src/src/readconf.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8 /* Functions for reading the configuration file, and for displaying
   9 overall configuration values. Thanks to Brian Candler for the original
  10 implementation of the conditional .ifdef etc. */
  11
  12 #include "exim.h"
  13
  14 #ifdef MACRO_PREDEF
  15 # include "macro_predef.h"
  16 #endif
  17
  18 #define READCONF_DEBUG  if (FALSE)      /* Change to TRUE to enable */
  19
  20
  21 static uschar * syslog_facility_str;
  22 static void fn_smtp_receive_timeout(const uschar *, const uschar *);
  23
  24 /*************************************************
  25 *           Main configuration options           *
  26 *************************************************/
  27
  28 /* The list of options that can be set in the main configuration file. This
  29 must be in alphabetic order because it is searched by binary chop. */
  30
  31 static optionlist optionlist_config[] = {
  32   { "*set_exim_group",          opt_bool|opt_hidden, &exim_gid_set },
  33   { "*set_exim_user",           opt_bool|opt_hidden, &exim_uid_set },
  34   { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
  35   { "*set_system_filter_user",  opt_bool|opt_hidden, &system_filter_uid_set },
  36   { "accept_8bitmime",          opt_bool,        &accept_8bitmime },
  37   { "acl_not_smtp",             opt_stringptr,   &acl_not_smtp },
  38 #ifdef WITH_CONTENT_SCAN
  39   { "acl_not_smtp_mime",        opt_stringptr,   &acl_not_smtp_mime },
  40 #endif
  41   { "acl_not_smtp_start",       opt_stringptr,   &acl_not_smtp_start },
  42   { "acl_smtp_auth",            opt_stringptr,   &acl_smtp_auth },
  43   { "acl_smtp_connect",         opt_stringptr,   &acl_smtp_connect },
  44   { "acl_smtp_data",            opt_stringptr,   &acl_smtp_data },
  45 #ifndef DISABLE_PRDR
  46   { "acl_smtp_data_prdr",       opt_stringptr,   &acl_smtp_data_prdr },
  47 #endif
  48 #ifndef DISABLE_DKIM
  49   { "acl_smtp_dkim",            opt_stringptr,   &acl_smtp_dkim },
  50 #endif
  51   { "acl_smtp_etrn",            opt_stringptr,   &acl_smtp_etrn },
  52   { "acl_smtp_expn",            opt_stringptr,   &acl_smtp_expn },
  53   { "acl_smtp_helo",            opt_stringptr,   &acl_smtp_helo },
  54   { "acl_smtp_mail",            opt_stringptr,   &acl_smtp_mail },
  55   { "acl_smtp_mailauth",        opt_stringptr,   &acl_smtp_mailauth },
  56 #ifdef WITH_CONTENT_SCAN
  57   { "acl_smtp_mime",            opt_stringptr,   &acl_smtp_mime },
  58 #endif
  59   { "acl_smtp_notquit",         opt_stringptr,   &acl_smtp_notquit },
  60   { "acl_smtp_predata",         opt_stringptr,   &acl_smtp_predata },
  61   { "acl_smtp_quit",            opt_stringptr,   &acl_smtp_quit },
  62   { "acl_smtp_rcpt",            opt_stringptr,   &acl_smtp_rcpt },
  63 #ifdef SUPPORT_TLS
  64   { "acl_smtp_starttls",        opt_stringptr,   &acl_smtp_starttls },
  65 #endif
  66   { "acl_smtp_vrfy",            opt_stringptr,   &acl_smtp_vrfy },
  67   { "add_environment",          opt_stringptr,   &add_environment },
  68   { "admin_groups",             opt_gidlist,     &admin_groups },
  69   { "allow_domain_literals",    opt_bool,        &allow_domain_literals },
  70   { "allow_mx_to_ip",           opt_bool,        &allow_mx_to_ip },
  71   { "allow_utf8_domains",       opt_bool,        &allow_utf8_domains },
  72   { "auth_advertise_hosts",     opt_stringptr,   &auth_advertise_hosts },
  73   { "auto_thaw",                opt_time,        &auto_thaw },
  74 #ifdef WITH_CONTENT_SCAN
  75   { "av_scanner",               opt_stringptr,   &av_scanner },
  76 #endif
  77   { "bi_command",               opt_stringptr,   &bi_command },
  78 #ifdef EXPERIMENTAL_BRIGHTMAIL
  79   { "bmi_config_file",          opt_stringptr,   &bmi_config_file },
  80 #endif
  81   { "bounce_message_file",      opt_stringptr,   &bounce_message_file },
  82   { "bounce_message_text",      opt_stringptr,   &bounce_message_text },
  83   { "bounce_return_body",       opt_bool,        &bounce_return_body },
  84   { "bounce_return_linesize_limit", opt_mkint,   &bounce_return_linesize_limit },
  85   { "bounce_return_message",    opt_bool,        &bounce_return_message },
  86   { "bounce_return_size_limit", opt_mkint,       &bounce_return_size_limit },
  87   { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
  88   { "callout_domain_negative_expire", opt_time,  &callout_cache_domain_negative_expire },
  89   { "callout_domain_positive_expire", opt_time,  &callout_cache_domain_positive_expire },
  90   { "callout_negative_expire",  opt_time,        &callout_cache_negative_expire },
  91   { "callout_positive_expire",  opt_time,        &callout_cache_positive_expire },
  92   { "callout_random_local_part",opt_stringptr,   &callout_random_local_part },
  93   { "check_log_inodes",         opt_int,         &check_log_inodes },
  94   { "check_log_space",          opt_Kint,        &check_log_space },
  95   { "check_rfc2047_length",     opt_bool,        &check_rfc2047_length },
  96   { "check_spool_inodes",       opt_int,         &check_spool_inodes },
  97   { "check_spool_space",        opt_Kint,        &check_spool_space },
  98   { "chunking_advertise_hosts", opt_stringptr,   &chunking_advertise_hosts },
  99   { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
 100   { "daemon_smtp_port",         opt_stringptr|opt_hidden, &daemon_smtp_port },
 101   { "daemon_smtp_ports",        opt_stringptr,   &daemon_smtp_port },
 102   { "daemon_startup_retries",   opt_int,         &daemon_startup_retries },
 103   { "daemon_startup_sleep",     opt_time,        &daemon_startup_sleep },
 104 #ifdef EXPERIMENTAL_DCC
 105   { "dcc_direct_add_header",    opt_bool,        &dcc_direct_add_header },
 106   { "dccifd_address",           opt_stringptr,   &dccifd_address },
 107   { "dccifd_options",           opt_stringptr,   &dccifd_options },
 108 #endif
 109   { "debug_store",              opt_bool,        &debug_store },
 110   { "delay_warning",            opt_timelist,    &delay_warning },
 111   { "delay_warning_condition",  opt_stringptr,   &delay_warning_condition },
 112   { "deliver_drop_privilege",   opt_bool,        &deliver_drop_privilege },
 113   { "deliver_queue_load_max",   opt_fixed,       &deliver_queue_load_max },
 114   { "delivery_date_remove",     opt_bool,        &delivery_date_remove },
 115 #ifdef ENABLE_DISABLE_FSYNC
 116   { "disable_fsync",            opt_bool,        &disable_fsync },
 117 #endif
 118   { "disable_ipv6",             opt_bool,        &disable_ipv6 },
 119 #ifndef DISABLE_DKIM
 120   { "dkim_verify_signers",      opt_stringptr,   &dkim_verify_signers },
 121 #endif
 122 #ifdef EXPERIMENTAL_DMARC
 123   { "dmarc_forensic_sender",    opt_stringptr,   &dmarc_forensic_sender },
 124   { "dmarc_history_file",       opt_stringptr,   &dmarc_history_file },
 125   { "dmarc_tld_file",           opt_stringptr,   &dmarc_tld_file },
 126 #endif
 127   { "dns_again_means_nonexist", opt_stringptr,   &dns_again_means_nonexist },
 128   { "dns_check_names_pattern",  opt_stringptr,   &check_dns_names_pattern },
 129   { "dns_cname_loops",          opt_int,         &dns_cname_loops },
 130   { "dns_csa_search_limit",     opt_int,         &dns_csa_search_limit },
 131   { "dns_csa_use_reverse",      opt_bool,        &dns_csa_use_reverse },
 132   { "dns_dnssec_ok",            opt_int,         &dns_dnssec_ok },
 133   { "dns_ipv4_lookup",          opt_stringptr,   &dns_ipv4_lookup },
 134   { "dns_retrans",              opt_time,        &dns_retrans },
 135   { "dns_retry",                opt_int,         &dns_retry },
 136   { "dns_trust_aa",             opt_stringptr,   &dns_trust_aa },
 137   { "dns_use_edns0",            opt_int,         &dns_use_edns0 },
 138  /* This option is now a no-op, retained for compatibility */
 139   { "drop_cr",                  opt_bool,        &drop_cr },
 140 /*********************************************************/
 141   { "dsn_advertise_hosts",      opt_stringptr,   &dsn_advertise_hosts },
 142   { "dsn_from",                 opt_stringptr,   &dsn_from },
 143   { "envelope_to_remove",       opt_bool,        &envelope_to_remove },
 144   { "errors_copy",              opt_stringptr,   &errors_copy },
 145   { "errors_reply_to",          opt_stringptr,   &errors_reply_to },
 146 #ifndef DISABLE_EVENT
 147   { "event_action",             opt_stringptr,   &event_action },
 148 #endif
 149   { "exim_group",               opt_gid,         &exim_gid },
 150   { "exim_path",                opt_stringptr,   &exim_path },
 151   { "exim_user",                opt_uid,         &exim_uid },
 152   { "extra_local_interfaces",   opt_stringptr,   &extra_local_interfaces },
 153   { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
 154   { "finduser_retries",         opt_int,         &finduser_retries },
 155   { "freeze_tell",              opt_stringptr,   &freeze_tell },
 156   { "gecos_name",               opt_stringptr,   &gecos_name },
 157   { "gecos_pattern",            opt_stringptr,   &gecos_pattern },
 158 #ifdef SUPPORT_TLS
 159   { "gnutls_allow_auto_pkcs11", opt_bool,        &gnutls_allow_auto_pkcs11 },
 160   { "gnutls_compat_mode",       opt_bool,        &gnutls_compat_mode },
 161 #endif
 162   { "header_line_maxsize",      opt_int,         &header_line_maxsize },
 163   { "header_maxsize",           opt_int,         &header_maxsize },
 164   { "headers_charset",          opt_stringptr,   &headers_charset },
 165   { "helo_accept_junk_hosts",   opt_stringptr,   &helo_accept_junk_hosts },
 166   { "helo_allow_chars",         opt_stringptr,   &helo_allow_chars },
 167   { "helo_lookup_domains",      opt_stringptr,   &helo_lookup_domains },
 168   { "helo_try_verify_hosts",    opt_stringptr,   &helo_try_verify_hosts },
 169   { "helo_verify_hosts",        opt_stringptr,   &helo_verify_hosts },
 170   { "hold_domains",             opt_stringptr,   &hold_domains },
 171   { "host_lookup",              opt_stringptr,   &host_lookup },
 172   { "host_lookup_order",        opt_stringptr,   &host_lookup_order },
 173   { "host_reject_connection",   opt_stringptr,   &host_reject_connection },
 174   { "hosts_connection_nolog",   opt_stringptr,   &hosts_connection_nolog },
 175 #ifdef SUPPORT_PROXY
 176   { "hosts_proxy",              opt_stringptr,   &hosts_proxy },
 177 #endif
 178   { "hosts_treat_as_local",     opt_stringptr,   &hosts_treat_as_local },
 179 #ifdef LOOKUP_IBASE
 180   { "ibase_servers",            opt_stringptr,   &ibase_servers },
 181 #endif
 182   { "ignore_bounce_errors_after", opt_time,      &ignore_bounce_errors_after },
 183   { "ignore_fromline_hosts",    opt_stringptr,   &ignore_fromline_hosts },
 184   { "ignore_fromline_local",    opt_bool,        &ignore_fromline_local },
 185   { "keep_environment",         opt_stringptr,   &keep_environment },
 186   { "keep_malformed",           opt_time,        &keep_malformed },
 187 #ifdef LOOKUP_LDAP
 188   { "ldap_ca_cert_dir",         opt_stringptr,   &eldap_ca_cert_dir },
 189   { "ldap_ca_cert_file",        opt_stringptr,   &eldap_ca_cert_file },
 190   { "ldap_cert_file",           opt_stringptr,   &eldap_cert_file },
 191   { "ldap_cert_key",            opt_stringptr,   &eldap_cert_key },
 192   { "ldap_cipher_suite",        opt_stringptr,   &eldap_cipher_suite },
 193   { "ldap_default_servers",     opt_stringptr,   &eldap_default_servers },
 194   { "ldap_require_cert",        opt_stringptr,   &eldap_require_cert },
 195   { "ldap_start_tls",           opt_bool,        &eldap_start_tls },
 196   { "ldap_version",             opt_int,         &eldap_version },
 197 #endif
 198   { "local_from_check",         opt_bool,        &local_from_check },
 199   { "local_from_prefix",        opt_stringptr,   &local_from_prefix },
 200   { "local_from_suffix",        opt_stringptr,   &local_from_suffix },
 201   { "local_interfaces",         opt_stringptr,   &local_interfaces },
 202 #ifdef HAVE_LOCAL_SCAN
 203   { "local_scan_timeout",       opt_time,        &local_scan_timeout },
 204 #endif
 205   { "local_sender_retain",      opt_bool,        &local_sender_retain },
 206   { "localhost_number",         opt_stringptr,   &host_number_string },
 207   { "log_file_path",            opt_stringptr,   &log_file_path },
 208   { "log_selector",             opt_stringptr,   &log_selector_string },
 209   { "log_timezone",             opt_bool,        &log_timezone },
 210   { "lookup_open_max",          opt_int,         &lookup_open_max },
 211   { "max_username_length",      opt_int,         &max_username_length },
 212   { "message_body_newlines",    opt_bool,        &message_body_newlines },
 213   { "message_body_visible",     opt_mkint,       &message_body_visible },
 214   { "message_id_header_domain", opt_stringptr,   &message_id_domain },
 215   { "message_id_header_text",   opt_stringptr,   &message_id_text },
 216   { "message_logs",             opt_bool,        &message_logs },
 217   { "message_size_limit",       opt_stringptr,   &message_size_limit },
 218 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
 219   { "move_frozen_messages",     opt_bool,        &move_frozen_messages },
 220 #endif
 221   { "mua_wrapper",              opt_bool,        &mua_wrapper },
 222 #ifdef LOOKUP_MYSQL
 223   { "mysql_servers",            opt_stringptr,   &mysql_servers },
 224 #endif
 225   { "never_users",              opt_uidlist,     &never_users },
 226 #ifdef SUPPORT_TLS
 227   { "openssl_options",          opt_stringptr,   &openssl_options },
 228 #endif
 229 #ifdef LOOKUP_ORACLE
 230   { "oracle_servers",           opt_stringptr,   &oracle_servers },
 231 #endif
 232   { "percent_hack_domains",     opt_stringptr,   &percent_hack_domains },
 233 #ifdef EXIM_PERL
 234   { "perl_at_start",            opt_bool,        &opt_perl_at_start },
 235   { "perl_startup",             opt_stringptr,   &opt_perl_startup },
 236   { "perl_taintmode",           opt_bool,        &opt_perl_taintmode },
 237 #endif
 238 #ifdef LOOKUP_PGSQL
 239   { "pgsql_servers",            opt_stringptr,   &pgsql_servers },
 240 #endif
 241   { "pid_file_path",            opt_stringptr,   &pid_file_path },
 242   { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
 243 #ifdef EXPERIMENTAL_PIPE_CONNECT
 244   { "pipelining_connect_advertise_hosts", opt_stringptr,
 245                                                  &pipe_connect_advertise_hosts },
 246 #endif
 247 #ifndef DISABLE_PRDR
 248   { "prdr_enable",              opt_bool,        &prdr_enable },
 249 #endif
 250   { "preserve_message_logs",    opt_bool,        &preserve_message_logs },
 251   { "primary_hostname",         opt_stringptr,   &primary_hostname },
 252   { "print_topbitchars",        opt_bool,        &print_topbitchars },
 253   { "process_log_path",         opt_stringptr,   &process_log_path },
 254   { "prod_requires_admin",      opt_bool,        &prod_requires_admin },
 255   { "qualify_domain",           opt_stringptr,   &qualify_domain_sender },
 256   { "qualify_recipient",        opt_stringptr,   &qualify_domain_recipient },
 257   { "queue_domains",            opt_stringptr,   &queue_domains },
 258   { "queue_list_requires_admin",opt_bool,        &queue_list_requires_admin },
 259   { "queue_only",               opt_bool,        &queue_only },
 260   { "queue_only_file",          opt_stringptr,   &queue_only_file },
 261   { "queue_only_load",          opt_fixed,       &queue_only_load },
 262   { "queue_only_load_latch",    opt_bool,        &queue_only_load_latch },
 263   { "queue_only_override",      opt_bool,        &queue_only_override },
 264   { "queue_run_in_order",       opt_bool,        &queue_run_in_order },
 265   { "queue_run_max",            opt_stringptr,   &queue_run_max },
 266   { "queue_smtp_domains",       opt_stringptr,   &queue_smtp_domains },
 267   { "receive_timeout",          opt_time,        &receive_timeout },
 268   { "received_header_text",     opt_stringptr,   &received_header_text },
 269   { "received_headers_max",     opt_int,         &received_headers_max },
 270   { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
 271   { "recipients_max",           opt_int,         &recipients_max },
 272   { "recipients_max_reject",    opt_bool,        &recipients_max_reject },
 273 #ifdef LOOKUP_REDIS
 274   { "redis_servers",            opt_stringptr,   &redis_servers },
 275 #endif
 276   { "remote_max_parallel",      opt_int,         &remote_max_parallel },
 277   { "remote_sort_domains",      opt_stringptr,   &remote_sort_domains },
 278   { "retry_data_expire",        opt_time,        &retry_data_expire },
 279   { "retry_interval_max",       opt_time,        &retry_interval_max },
 280   { "return_path_remove",       opt_bool,        &return_path_remove },
 281   { "return_size_limit",        opt_mkint|opt_hidden, &bounce_return_size_limit },
 282   { "rfc1413_hosts",            opt_stringptr,   &rfc1413_hosts },
 283   { "rfc1413_query_timeout",    opt_time,        &rfc1413_query_timeout },
 284   { "sender_unqualified_hosts", opt_stringptr,   &sender_unqualified_hosts },
 285   { "slow_lookup_log",          opt_int,         &slow_lookup_log },
 286   { "smtp_accept_keepalive",    opt_bool,        &smtp_accept_keepalive },
 287   { "smtp_accept_max",          opt_int,         &smtp_accept_max },
 288   { "smtp_accept_max_nonmail",  opt_int,         &smtp_accept_max_nonmail },
 289   { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
 290   { "smtp_accept_max_per_connection", opt_int,   &smtp_accept_max_per_connection },
 291   { "smtp_accept_max_per_host", opt_stringptr,   &smtp_accept_max_per_host },
 292   { "smtp_accept_queue",        opt_int,         &smtp_accept_queue },
 293   { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
 294   { "smtp_accept_reserve",      opt_int,         &smtp_accept_reserve },
 295   { "smtp_active_hostname",     opt_stringptr,   &raw_active_hostname },
 296   { "smtp_banner",              opt_stringptr,   &smtp_banner },
 297   { "smtp_check_spool_space",   opt_bool,        &smtp_check_spool_space },
 298   { "smtp_connect_backlog",     opt_int,         &smtp_connect_backlog },
 299   { "smtp_enforce_sync",        opt_bool,        &smtp_enforce_sync },
 300   { "smtp_etrn_command",        opt_stringptr,   &smtp_etrn_command },
 301   { "smtp_etrn_serialize",      opt_bool,        &smtp_etrn_serialize },
 302   { "smtp_load_reserve",        opt_fixed,       &smtp_load_reserve },
 303   { "smtp_max_synprot_errors",  opt_int,         &smtp_max_synprot_errors },
 304   { "smtp_max_unknown_commands",opt_int,         &smtp_max_unknown_commands },
 305   { "smtp_ratelimit_hosts",     opt_stringptr,   &smtp_ratelimit_hosts },
 306   { "smtp_ratelimit_mail",      opt_stringptr,   &smtp_ratelimit_mail },
 307   { "smtp_ratelimit_rcpt",      opt_stringptr,   &smtp_ratelimit_rcpt },
 308   { "smtp_receive_timeout",     opt_func,        &fn_smtp_receive_timeout },
 309   { "smtp_reserve_hosts",       opt_stringptr,   &smtp_reserve_hosts },
 310   { "smtp_return_error_details",opt_bool,        &smtp_return_error_details },
 311 #ifdef SUPPORT_I18N
 312   { "smtputf8_advertise_hosts", opt_stringptr,   &smtputf8_advertise_hosts },
 313 #endif
 314 #ifdef WITH_CONTENT_SCAN
 315   { "spamd_address",            opt_stringptr,   &spamd_address },
 316 #endif
 317 #ifdef SUPPORT_SPF
 318   { "spf_guess",                opt_stringptr,   &spf_guess },
 319 #endif
 320   { "split_spool_directory",    opt_bool,        &split_spool_directory },
 321   { "spool_directory",          opt_stringptr,   &spool_directory },
 322   { "spool_wireformat",         opt_bool,        &spool_wireformat },
 323 #ifdef LOOKUP_SQLITE
 324   { "sqlite_lock_timeout",      opt_int,         &sqlite_lock_timeout },
 325 #endif
 326 #ifdef EXPERIMENTAL_SRS
 327   { "srs_config",               opt_stringptr,   &srs_config },
 328   { "srs_hashlength",           opt_int,         &srs_hashlength },
 329   { "srs_hashmin",              opt_int,         &srs_hashmin },
 330   { "srs_maxage",               opt_int,         &srs_maxage },
 331   { "srs_secrets",              opt_stringptr,   &srs_secrets },
 332   { "srs_usehash",              opt_bool,        &srs_usehash },
 333   { "srs_usetimestamp",         opt_bool,        &srs_usetimestamp },
 334 #endif
 335   { "strict_acl_vars",          opt_bool,        &strict_acl_vars },
 336   { "strip_excess_angle_brackets", opt_bool,     &strip_excess_angle_brackets },
 337   { "strip_trailing_dot",       opt_bool,        &strip_trailing_dot },
 338   { "syslog_duplication",       opt_bool,        &syslog_duplication },
 339   { "syslog_facility",          opt_stringptr,   &syslog_facility_str },
 340   { "syslog_pid",               opt_bool,        &syslog_pid },
 341   { "syslog_processname",       opt_stringptr,   &syslog_processname },
 342   { "syslog_timestamp",         opt_bool,        &syslog_timestamp },
 343   { "system_filter",            opt_stringptr,   &system_filter },
 344   { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
 345   { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
 346   { "system_filter_group",      opt_gid,         &system_filter_gid },
 347   { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
 348   { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
 349   { "system_filter_user",       opt_uid,         &system_filter_uid },
 350   { "tcp_nodelay",              opt_bool,        &tcp_nodelay },
 351 #ifdef USE_TCP_WRAPPERS
 352   { "tcp_wrappers_daemon_name", opt_stringptr,   &tcp_wrappers_daemon_name },
 353 #endif
 354   { "timeout_frozen_after",     opt_time,        &timeout_frozen_after },
 355   { "timezone",                 opt_stringptr,   &timezone_string },
 356   { "tls_advertise_hosts",      opt_stringptr,   &tls_advertise_hosts },
 357 #ifdef SUPPORT_TLS
 358 # ifdef EXPERIMENTAL_REQUIRETLS
 359   { "tls_advertise_requiretls", opt_stringptr,   &tls_advertise_requiretls },
 360 # endif
 361   { "tls_certificate",          opt_stringptr,   &tls_certificate },
 362   { "tls_crl",                  opt_stringptr,   &tls_crl },
 363   { "tls_dh_max_bits",          opt_int,         &tls_dh_max_bits },
 364   { "tls_dhparam",              opt_stringptr,   &tls_dhparam },
 365   { "tls_eccurve",              opt_stringptr,   &tls_eccurve },
 366 # ifndef DISABLE_OCSP
 367   { "tls_ocsp_file",            opt_stringptr,   &tls_ocsp_file },
 368 # endif
 369   { "tls_on_connect_ports",     opt_stringptr,   &tls_in.on_connect_ports },
 370   { "tls_privatekey",           opt_stringptr,   &tls_privatekey },
 371   { "tls_remember_esmtp",       opt_bool,        &tls_remember_esmtp },
 372   { "tls_require_ciphers",      opt_stringptr,   &tls_require_ciphers },
 373   { "tls_try_verify_hosts",     opt_stringptr,   &tls_try_verify_hosts },
 374   { "tls_verify_certificates",  opt_stringptr,   &tls_verify_certificates },
 375   { "tls_verify_hosts",         opt_stringptr,   &tls_verify_hosts },
 376 #endif
 377   { "trusted_groups",           opt_gidlist,     &trusted_groups },
 378   { "trusted_users",            opt_uidlist,     &trusted_users },
 379   { "unknown_login",            opt_stringptr,   &unknown_login },
 380   { "unknown_username",         opt_stringptr,   &unknown_username },
 381   { "untrusted_set_sender",     opt_stringptr,   &untrusted_set_sender },
 382   { "uucp_from_pattern",        opt_stringptr,   &uucp_from_pattern },
 383   { "uucp_from_sender",         opt_stringptr,   &uucp_from_sender },
 384   { "warn_message_file",        opt_stringptr,   &warn_message_file },
 385   { "write_rejectlog",          opt_bool,        &write_rejectlog }
 386 };
 387
 388 #ifndef MACRO_PREDEF
 389 static int optionlist_config_size = nelem(optionlist_config);
 390 #endif
 391
 392
 393 #ifdef MACRO_PREDEF
 394
 395 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
 396
 397 void
 398 options_main(void)
 399 {
 400 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
 401 }
 402
 403 void
 404 options_auths(void)
 405 {
 406 uschar buf[64];
 407
 408 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
 409
 410 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
 411   {
 412   spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
 413   builtin_macro_create(buf);
 414   options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
 415   }
 416 }
 417
 418 void
 419 options_logging(void)
 420 {
 421 uschar buf[64];
 422
 423 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
 424   {
 425   spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
 426   builtin_macro_create(buf);
 427   }
 428 }
 429
 430
 431 #else   /*!MACRO_PREDEF*/
 432
 433 extern char **environ;
 434
 435 static void save_config_line(const uschar* line);
 436 static void save_config_position(const uschar *file, int line);
 437 static void print_config(BOOL admin, BOOL terse);
 438
 439
 440 #define CSTATE_STACK_SIZE 10
 441
 442 const uschar *config_directory = NULL;
 443
 444
 445 /* Structure for chain (stack) of .included files */
 446
 447 typedef struct config_file_item {
 448   struct config_file_item *next;
 449   const uschar *filename;
 450   const uschar *directory;
 451   FILE *file;
 452   int lineno;
 453 } config_file_item;
 454
 455 /* Structure for chain of configuration lines (-bP config) */
 456
 457 typedef struct config_line_item {
 458   struct config_line_item *next;
 459   uschar *line;
 460 } config_line_item;
 461
 462 static config_line_item* config_lines;
 463
 464 /* Structure of table of conditional words and their state transitions */
 465
 466 typedef struct cond_item {
 467   uschar *name;
 468   int    namelen;
 469   int    action1;
 470   int    action2;
 471   int    pushpop;
 472 } cond_item;
 473
 474 /* Structure of table of syslog facility names and values */
 475
 476 typedef struct syslog_fac_item {
 477   uschar *name;
 478   int    value;
 479 } syslog_fac_item;
 480
 481 /* constants */
 482 static const char * const hidden = "<value not displayable>";
 483
 484 /* Static variables */
 485
 486 static config_file_item *config_file_stack = NULL;  /* For includes */
 487
 488 static uschar *syslog_facility_str  = NULL;
 489 static uschar next_section[24];
 490 static uschar time_buffer[24];
 491
 492 /* State variables for conditional loading (.ifdef / .else / .endif) */
 493
 494 static int cstate = 0;
 495 static int cstate_stack_ptr = -1;
 496 static int cstate_stack[CSTATE_STACK_SIZE];
 497
 498 /* Table of state transitions for handling conditional inclusions. There are
 499 four possible state transitions:
 500
 501   .ifdef true
 502   .ifdef false
 503   .elifdef true  (or .else)
 504   .elifdef false
 505
 506 .endif just causes the previous cstate to be popped off the stack */
 507
 508 static int next_cstate[3][4] =
 509   {
 510   /* State 0: reading from file, or reading until next .else or .endif */
 511   { 0, 1, 2, 2 },
 512   /* State 1: condition failed, skipping until next .else or .endif */
 513   { 2, 2, 0, 1 },
 514   /* State 2: skipping until .endif */
 515   { 2, 2, 2, 2 },
 516   };
 517
 518 /* Table of conditionals and the states to set. For each name, there are four
 519 values: the length of the name (to save computing it each time), the state to
 520 set if a macro was found in the line, the state to set if a macro was not found
 521 in the line, and a stack manipulation setting which is:
 522
 523   -1   pull state value off the stack
 524    0   don't alter the stack
 525   +1   push value onto stack, before setting new state
 526 */
 527
 528 static cond_item cond_list[] = {
 529   { US"ifdef",    5, 0, 1,  1 },
 530   { US"ifndef",   6, 1, 0,  1 },
 531   { US"elifdef",  7, 2, 3,  0 },
 532   { US"elifndef", 8, 3, 2,  0 },
 533   { US"else",     4, 2, 2,  0 },
 534   { US"endif",    5, 0, 0, -1 }
 535 };
 536
 537 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
 538
 539 /* Table of syslog facility names and their values */
 540
 541 static syslog_fac_item syslog_list[] = {
 542   { US"mail",   LOG_MAIL },
 543   { US"user",   LOG_USER },
 544   { US"news",   LOG_NEWS },
 545   { US"uucp",   LOG_UUCP },
 546   { US"local0", LOG_LOCAL0 },
 547   { US"local1", LOG_LOCAL1 },
 548   { US"local2", LOG_LOCAL2 },
 549   { US"local3", LOG_LOCAL3 },
 550   { US"local4", LOG_LOCAL4 },
 551   { US"local5", LOG_LOCAL5 },
 552   { US"local6", LOG_LOCAL6 },
 553   { US"local7", LOG_LOCAL7 },
 554   { US"daemon", LOG_DAEMON }
 555 };
 556
 557 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
 558
 559
 560
 561
 562 /*************************************************
 563 *         Find the name of an option             *
 564 *************************************************/
 565
 566 /* This function is to aid debugging. Various functions take arguments that are
 567 pointer variables in the options table or in option tables for various drivers.
 568 For debugging output, it is useful to be able to find the name of the option
 569 which is currently being processed. This function finds it, if it exists, by
 570 searching the table(s).
 571
 572 Arguments:   a value that is presumed to be in the table above
 573 Returns:     the option name, or an empty string
 574 */
 575
 576 uschar *
 577 readconf_find_option(void *p)
 578 {
 579 for (int i = 0; i < nelem(optionlist_config); i++)
 580   if (p == optionlist_config[i].value) return US optionlist_config[i].name;
 581
 582 for (router_instance * r = routers; r; r = r->next)
 583   {
 584   router_info *ri = r->info;
 585   for (int i = 0; i < *ri->options_count; i++)
 586     {
 587     if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
 588     if (p == CS (r->options_block) + (long int)(ri->options[i].value))
 589       return US ri->options[i].name;
 590     }
 591   }
 592
 593 for (transport_instance * t = transports; t; t = t->next)
 594   {
 595   transport_info *ti = t->info;
 596   for (int i = 0; i < *ti->options_count; i++)
 597     {
 598     optionlist * op = &ti->options[i];
 599     if ((op->type & opt_mask) != opt_stringptr) continue;
 600     if (p == (  op->type & opt_public
 601              ? CS t
 602              : CS t->options_block
 603              )
 604              + (long int)op->value)
 605         return US op->name;
 606     }
 607   }
 608
 609 return US"";
 610 }
 611
 612
 613
 614
 615 /*************************************************
 616 *       Deal with an assignment to a macro       *
 617 *************************************************/
 618
 619 /* We have a new definition; append to the list.
 620
 621 Args:
 622  name   Name of the macro; will be copied
 623  val    Expansion result for the macro; will be copied
 624 */
 625
 626 macro_item *
 627 macro_create(const uschar * name, const uschar * val, BOOL command_line)
 628 {
 629 macro_item * m = store_get(sizeof(macro_item));
 630
 631 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
 632 m->next = NULL;
 633 m->command_line = command_line;
 634 m->namelen = Ustrlen(name);
 635 m->replen = Ustrlen(val);
 636 m->name = string_copy(name);
 637 m->replacement = string_copy(val);
 638 if (mlast)
 639   mlast->next = m;
 640 else
 641   macros = m;
 642 mlast = m;
 643 if (!macros_user)
 644   macros_user = m;
 645 return m;
 646 }
 647
 648
 649 /* This function is called when a line that starts with an upper case letter is
 650 encountered. The argument "line" should contain a complete logical line, and
 651 start with the first letter of the macro name. The macro name and the
 652 replacement text are extracted and stored. Redefinition of existing,
 653 non-command line, macros is permitted using '==' instead of '='.
 654
 655 Arguments:
 656   s            points to the start of the logical line
 657
 658 Returns:       FALSE iff fatal error
 659 */
 660
 661 BOOL
 662 macro_read_assignment(uschar *s)
 663 {
 664 uschar name[64];
 665 int namelen = 0;
 666 BOOL redef = FALSE;
 667 macro_item *m;
 668
 669 while (isalnum(*s) || *s == '_')
 670   {
 671   if (namelen >= sizeof(name) - 1)
 672     {
 673     log_write(0, LOG_PANIC|LOG_CONFIG_IN,
 674       "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
 675     return FALSE;
 676     }
 677   name[namelen++] = *s++;
 678   }
 679 name[namelen] = 0;
 680
 681 while (isspace(*s)) s++;
 682 if (*s++ != '=')
 683   {
 684   log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
 685   return FALSE;
 686   }
 687
 688 if (*s == '=')
 689   {
 690   redef = TRUE;
 691   s++;
 692   }
 693 while (isspace(*s)) s++;
 694
 695 /* If an existing macro of the same name was defined on the command line, we
 696 just skip this definition. It's an error to attempt to redefine a macro without
 697 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
 698 It is also an error to define a macro whose name begins with the name of a
 699 previously defined macro.  This is the requirement that make using a tree
 700 for macros hard; we must check all macros for the substring.  Perhaps a
 701 sorted list, and a bsearch, would work?
 702 Note: it is documented that the other way round works. */
 703
 704 for (m = macros; m; m = m->next)
 705   {
 706   if (Ustrcmp(m->name, name) == 0)
 707     {
 708     if (!m->command_line && !redef)
 709       {
 710       log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
 711        "defined (use \"==\" if you want to redefine it)", name);
 712       return FALSE;
 713       }
 714     break;
 715     }
 716
 717   if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
 718     {
 719     log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
 720       "a macro because previously defined macro \"%s\" is a substring",
 721       name, m->name);
 722     return FALSE;
 723     }
 724
 725   /* We cannot have this test, because it is documented that a substring
 726   macro is permitted (there is even an example).
 727   *
 728   * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
 729   *   log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
 730   *     "a macro because it is a substring of previously defined macro \"%s\"",
 731   *     name, m->name);
 732   */
 733   }
 734
 735 /* Check for an overriding command-line definition. */
 736
 737 if (m && m->command_line) return TRUE;
 738
 739 /* Redefinition must refer to an existing macro. */
 740
 741 if (redef)
 742   if (m)
 743     {
 744     m->replen = Ustrlen(s);
 745     m->replacement = string_copy(s);
 746     }
 747   else
 748     {
 749     log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
 750       "\"%s\"", name);
 751     return FALSE;
 752     }
 753
 754 /* We have a new definition. */
 755 else
 756   (void) macro_create(name, s, FALSE);
 757 return TRUE;
 758 }
 759
 760
 761
 762
 763
 764 /* Process line for macros. The line is in big_buffer starting at offset len.
 765 Expand big_buffer if needed.  Handle definitions of new macros, and
 766 macro expansions, rewriting the line in the buffer.
 767
 768 Arguments:
 769  len            Offset in buffer of start of line
 770  newlen         Pointer to offset of end of line, updated on return
 771  macro_found    Pointer to return that a macro was expanded
 772
 773 Return: pointer to first nonblank char in line
 774 */
 775
 776 uschar *
 777 macros_expand(int len, int * newlen, BOOL * macro_found)
 778 {
 779 uschar * ss = big_buffer + len;
 780 uschar * s;
 781
 782 /* Find the true start of the physical line - leading spaces are always
 783 ignored. */
 784
 785 while (isspace(*ss)) ss++;
 786
 787 /* Process the physical line for macros. If this is the start of the logical
 788 line, skip over initial text at the start of the line if it starts with an
 789 upper case character followed by a sequence of name characters and an equals
 790 sign, because that is the definition of a new macro, and we don't do
 791 replacement therein. */
 792
 793 s = ss;
 794 if (len == 0 && isupper(*s))
 795   {
 796   while (isalnum(*s) || *s == '_') s++;
 797   while (isspace(*s)) s++;
 798   if (*s != '=') s = ss;          /* Not a macro definition */
 799   }
 800
 801 /* Skip leading chars which cannot start a macro name, to avoid multiple
 802 pointless rescans in Ustrstr calls. */
 803
 804 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
 805
 806 /* For each defined macro, scan the line (from after XXX= if present),
 807 replacing all occurrences of the macro. */
 808
 809 *macro_found = FALSE;
 810 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
 811   {
 812   uschar * p, *pp;
 813   uschar * t;
 814
 815   while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
 816   if (!*s) break;
 817
 818   t = s;
 819   while ((p = Ustrstr(t, m->name)) != NULL)
 820     {
 821     int moveby;
 822
 823     READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
 824       m->name, (int) Ustrlen(ss)-1, ss);
 825     /* Expand the buffer if necessary */
 826
 827     while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
 828       {
 829       int newsize = big_buffer_size + BIG_BUFFER_SIZE;
 830       uschar *newbuffer = store_malloc(newsize);
 831       memcpy(newbuffer, big_buffer, *newlen + 1);
 832       p = newbuffer  + (p - big_buffer);
 833       s = newbuffer  + (s - big_buffer);
 834       ss = newbuffer + (ss - big_buffer);
 835       t = newbuffer  + (t - big_buffer);
 836       big_buffer_size = newsize;
 837       store_free(big_buffer);
 838       big_buffer = newbuffer;
 839       }
 840
 841     /* Shuffle the remaining characters up or down in the buffer before
 842     copying in the replacement text. Don't rescan the replacement for this
 843     same macro. */
 844
 845     pp = p + m->namelen;
 846     if ((moveby = m->replen - m->namelen) != 0)
 847       {
 848       memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
 849       *newlen += moveby;
 850       }
 851     Ustrncpy(p, m->replacement, m->replen);
 852     t = p + m->replen;
 853     while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
 854     *macro_found = TRUE;
 855     }
 856   }
 857
 858 /* An empty macro replacement at the start of a line could mean that ss no
 859 longer points to the first non-blank character. */
 860
 861 while (isspace(*ss)) ss++;
 862 return ss;
 863 }
 864
 865 /*************************************************
 866 *            Read configuration line             *
 867 *************************************************/
 868
 869 /* A logical line of text is read from the configuration file into the big
 870 buffer, taking account of macros, .includes, and continuations. The size of
 871 big_buffer is increased if necessary. The count of configuration lines is
 872 maintained. Physical input lines starting with # (ignoring leading white space,
 873 and after macro replacement) and empty logical lines are always ignored.
 874 Leading and trailing spaces are removed.
 875
 876 If we hit a line of the form "begin xxxx", the xxxx is placed in the
 877 next_section vector, and the function returns NULL, indicating the end of a
 878 configuration section. On end-of-file, NULL is returned with next_section
 879 empty.
 880
 881 Arguments:      none
 882
 883 Returns:        a pointer to the first non-blank in the line,
 884                 or NULL if eof or end of section is reached
 885 */
 886
 887 static uschar *
 888 get_config_line(void)
 889 {
 890 int startoffset = 0;         /* To first non-blank char in logical line */
 891 int len = 0;                 /* Of logical line so far */
 892 int newlen;
 893 uschar *s, *ss;
 894 BOOL macro_found;
 895
 896 /* Loop for handling continuation lines, skipping comments, and dealing with
 897 .include files. */
 898
 899 for (;;)
 900   {
 901   if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
 902     {
 903     if (config_file_stack != NULL)    /* EOF inside .include */
 904       {
 905       (void)fclose(config_file);
 906       config_file = config_file_stack->file;
 907       config_filename = config_file_stack->filename;
 908       config_directory = config_file_stack->directory;
 909       config_lineno = config_file_stack->lineno;
 910       config_file_stack = config_file_stack->next;
 911       if (config_lines)
 912         save_config_position(config_filename, config_lineno);
 913       continue;
 914       }
 915
 916     /* EOF at top level */
 917
 918     if (cstate_stack_ptr >= 0)
 919       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
 920         "Unexpected end of configuration file: .endif missing");
 921
 922     if (len != 0) break;        /* EOF after continuation */
 923     next_section[0] = 0;        /* EOF at start of logical line */
 924     return NULL;
 925     }
 926
 927   config_lineno++;
 928   newlen = len + Ustrlen(big_buffer + len);
 929
 930   if (config_lines && config_lineno == 1)
 931     save_config_position(config_filename, config_lineno);
 932
 933   /* Handle pathologically long physical lines - yes, it did happen - by
 934   extending big_buffer at this point. The code also copes with very long
 935   logical lines. */
 936
 937   while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
 938     {
 939     uschar *newbuffer;
 940     big_buffer_size += BIG_BUFFER_SIZE;
 941     newbuffer = store_malloc(big_buffer_size);
 942
 943     /* This use of strcpy is OK because we know that the string in the old
 944     buffer is shorter than the new buffer. */
 945
 946     Ustrcpy(newbuffer, big_buffer);
 947     store_free(big_buffer);
 948     big_buffer = newbuffer;
 949     if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
 950       break;
 951     newlen += Ustrlen(big_buffer + newlen);
 952     }
 953
 954   ss = macros_expand(len, &newlen, &macro_found);
 955
 956   /* Check for comment lines - these are physical lines. */
 957
 958   if (*ss == '#') continue;
 959
 960   /* Handle conditionals, which are also applied to physical lines. Conditions
 961   are of the form ".ifdef ANYTEXT" and are treated as true if any macro
 962   expansion occurred on the rest of the line. A preliminary test for the leading
 963   '.' saves effort on most lines. */
 964
 965   if (*ss == '.')
 966     {
 967     int i;
 968
 969     /* Search the list of conditional directives */
 970
 971     for (i = 0; i < cond_list_size; i++)
 972       {
 973       int n;
 974       cond_item *c = cond_list+i;
 975       if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
 976
 977       /* The following character must be white space or end of string */
 978
 979       n = ss[1 + c->namelen];
 980       if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
 981
 982       /* .ifdef and .ifndef push the current state onto the stack, then set
 983       a new one from the table. Stack overflow is an error */
 984
 985       if (c->pushpop > 0)
 986         {
 987         if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
 988           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
 989             ".%s nested too deeply", c->name);
 990         cstate_stack[++cstate_stack_ptr] = cstate;
 991         cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
 992         }
 993
 994       /* For any of the others, stack underflow is an error. The next state
 995       comes either from the stack (.endif) or from the table. */
 996
 997       else
 998         {
 999         if (cstate_stack_ptr < 0)
1000           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1001             ".%s without matching .ifdef", c->name);
1002         cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1003           next_cstate[cstate][macro_found? c->action1 : c->action2];
1004         }
1005
1006       /* Having dealt with a directive, break the loop */
1007
1008       break;
1009       }
1010
1011     /* If we have handled a conditional directive, continue with the next
1012     physical line. Otherwise, fall through. */
1013
1014     if (i < cond_list_size) continue;
1015     }
1016
1017   /* If the conditional state is not 0 (actively using these lines), ignore
1018   this input line. */
1019
1020   if (cstate != 0) continue;  /* Conditional skip */
1021
1022   /* Handle .include lines - these are also physical lines. */
1023
1024   if (Ustrncmp(ss, ".include", 8) == 0 &&
1025        (isspace(ss[8]) ||
1026          (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1027     {
1028     uschar *t;
1029     int include_if_exists = isspace(ss[8])? 0 : 10;
1030     config_file_item *save;
1031     struct stat statbuf;
1032
1033     ss += 9 + include_if_exists;
1034     while (isspace(*ss)) ss++;
1035     t = ss + Ustrlen(ss);
1036     while (t > ss && isspace(t[-1])) t--;
1037     if (*ss == '\"' && t[-1] == '\"')
1038       {
1039       ss++;
1040       t--;
1041       }
1042     *t = 0;
1043
1044     /* We allow relative file names. For security reasons currently
1045     relative names not allowed with .include_if_exists. For .include_if_exists
1046     we need to check the permissions/ownership of the containing folder */
1047     if (*ss != '/')
1048       if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1049           "absolute path \"%s\"", ss);
1050       else
1051         {
1052         gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1053         ss = string_from_gstring(g);
1054         }
1055
1056     if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1057
1058     if (config_lines)
1059       save_config_position(config_filename, config_lineno);
1060     save = store_get(sizeof(config_file_item));
1061     save->next = config_file_stack;
1062     config_file_stack = save;
1063     save->file = config_file;
1064     save->filename = config_filename;
1065     save->directory = config_directory;
1066     save->lineno = config_lineno;
1067
1068     if (!(config_file = Ufopen(ss, "rb")))
1069       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1070         "configuration file %s", ss);
1071
1072     config_filename = string_copy(ss);
1073     config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1074     config_lineno = 0;
1075     continue;
1076     }
1077
1078   /* If this is the start of the logical line, remember where the non-blank
1079   data starts. Otherwise shuffle down continuation lines to remove leading
1080   white space. */
1081
1082   if (len == 0)
1083     startoffset = ss - big_buffer;
1084   else
1085     {
1086     s = big_buffer + len;
1087     if (ss > s)
1088       {
1089       memmove(s, ss, (newlen - len) -  (ss - s) + 1);
1090       newlen -= ss - s;
1091       }
1092     }
1093
1094   /* Accept the new addition to the line. Remove trailing white space. */
1095
1096   len = newlen;
1097   while (len > 0 && isspace(big_buffer[len-1])) len--;
1098   big_buffer[len] = 0;
1099
1100   /* We are done if the line does not end in backslash and contains some data.
1101   Empty logical lines are ignored. For continuations, remove the backslash and
1102   go round the loop to read the continuation line. */
1103
1104   if (len > 0)
1105     {
1106     if (big_buffer[len-1] != '\\') break;   /* End of logical line */
1107     big_buffer[--len] = 0;                  /* Remove backslash */
1108     }
1109   }     /* Loop for reading multiple physical lines */
1110
1111 /* We now have a logical line. Test for the end of a configuration section (or,
1112 more accurately, for the start of the next section). Place the name of the next
1113 section in next_section, and return NULL. If the name given is longer than
1114 next_section, truncate it. It will be unrecognized later, because all the known
1115 section names do fit. Leave space for pluralizing. */
1116
1117 s = big_buffer + startoffset;            /* First non-space character */
1118
1119 if (config_lines)
1120   save_config_line(s);
1121
1122 if (strncmpic(s, US"begin ", 6) == 0)
1123   {
1124   s += 6;
1125   while (isspace(*s)) s++;
1126   if (big_buffer + len - s > sizeof(next_section) - 2)
1127     s[sizeof(next_section) - 2] = 0;
1128   Ustrcpy(next_section, s);
1129   return NULL;
1130   }
1131
1132 /* Return the first non-blank character. */
1133
1134 return s;
1135 }
1136
1137
1138
1139 /*************************************************
1140 *             Read a name                        *
1141 *************************************************/
1142
1143 /* The yield is the pointer to the next uschar. Names longer than the
1144 output space are silently truncated. This function is also used from acl.c when
1145 parsing ACLs.
1146
1147 Arguments:
1148   name      where to put the name
1149   len       length of name
1150   s         input pointer
1151
1152 Returns:    new input pointer
1153 */
1154
1155 uschar *
1156 readconf_readname(uschar *name, int len, uschar *s)
1157 {
1158 int p = 0;
1159 while (isspace(*s)) s++;
1160 if (isalpha(*s))
1161   {
1162   while (isalnum(*s) || *s == '_')
1163     {
1164     if (p < len-1) name[p++] = *s;
1165     s++;
1166     }
1167   }
1168 name[p] = 0;
1169 while (isspace(*s)) s++;
1170 return s;
1171 }
1172
1173
1174
1175
1176 /*************************************************
1177 *          Read a time value                     *
1178 *************************************************/
1179
1180 /* This function is also called from outside, to read argument
1181 time values. The format of a time value is:
1182
1183   [<n>w][<n>d][<n>h][<n>m][<n>s]
1184
1185 as long as at least one is present. If a format error is encountered,
1186 return a negative value. The value must be terminated by the given
1187 terminator.
1188
1189 Arguments:
1190   s             input pointer
1191   terminator    required terminating character
1192   return_msec   if TRUE, allow fractional seconds and return milliseconds
1193
1194 Returns:        the time value, or -1 on syntax error
1195                 value is seconds if return_msec is FALSE
1196                 value is milliseconds if return_msec is TRUE
1197 */
1198
1199 int
1200 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1201 {
1202 int yield = 0;
1203 for (;;)
1204   {
1205   int value, count;
1206   double fraction;
1207
1208   if (!isdigit(*s)) return -1;
1209   (void)sscanf(CCS s, "%d%n", &value, &count);
1210   s += count;
1211
1212   switch (*s)
1213     {
1214     case 'w': value *= 7;
1215     case 'd': value *= 24;
1216     case 'h': value *= 60;
1217     case 'm': value *= 60;
1218     case 's': s++;
1219     break;
1220
1221     case '.':
1222     if (!return_msec) return -1;
1223     (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1224     s += count;
1225     if (*s++ != 's') return -1;
1226     yield += (int)(fraction * 1000.0);
1227     break;
1228
1229     default: return -1;
1230     }
1231
1232   if (return_msec) value *= 1000;
1233   yield += value;
1234   if (*s == terminator) return yield;
1235   }
1236 /* Control never reaches here. */
1237 }
1238
1239
1240
1241 /*************************************************
1242 *          Read a fixed point value              *
1243 *************************************************/
1244
1245 /* The value is returned *1000
1246
1247 Arguments:
1248   s           input pointer
1249   terminator  required terminator
1250
1251 Returns:      the value, or -1 on error
1252 */
1253
1254 static int
1255 readconf_readfixed(const uschar *s, int terminator)
1256 {
1257 int yield = 0;
1258 int value, count;
1259 if (!isdigit(*s)) return -1;
1260 (void)sscanf(CS  s, "%d%n", &value, &count);
1261 s += count;
1262 yield = value * 1000;
1263 if (*s == '.')
1264   {
1265   int m = 100;
1266   while (isdigit((*(++s))))
1267     {
1268     yield += (*s - '0') * m;
1269     m /= 10;
1270     }
1271   }
1272
1273 return (*s == terminator)? yield : (-1);
1274 }
1275
1276
1277
1278 /*************************************************
1279 *            Find option in list                 *
1280 *************************************************/
1281
1282 /* The lists are always in order, so binary chop can be used.
1283
1284 Arguments:
1285   name      the option name to search for
1286   ol        the first entry in the option list
1287   last      one more than the offset of the last entry in the option list
1288
1289 Returns:    pointer to an option entry, or NULL if not found
1290 */
1291
1292 static optionlist *
1293 find_option(uschar *name, optionlist *ol, int last)
1294 {
1295 int first = 0;
1296 while (last > first)
1297   {
1298   int middle = (first + last)/2;
1299   int c = Ustrcmp(name, ol[middle].name);
1300
1301   if (c == 0) return ol + middle;
1302   else if (c > 0) first = middle + 1;
1303   else last = middle;
1304   }
1305 return NULL;
1306 }
1307
1308
1309
1310 /*************************************************
1311 *      Find a set flag in option list            *
1312 *************************************************/
1313
1314 /* Because some versions of Unix make no restrictions on the values of uids and
1315 gids (even negative ones), we cannot represent "unset" by a special value.
1316 There is therefore a separate boolean variable for each one indicating whether
1317 a value is set or not. This function returns a pointer to the boolean, given
1318 the original option name. It is a major disaster if the flag cannot be found.
1319
1320 Arguments:
1321   name          the name of the uid or gid option
1322   oltop         points to the start of the relevant option list
1323   last          one more than the offset of the last item in the option list
1324   data_block    NULL when reading main options => data values in the option
1325                   list are absolute addresses; otherwise they are byte offsets
1326                   in data_block (used for driver options)
1327
1328 Returns:        a pointer to the boolean flag.
1329 */
1330
1331 static BOOL *
1332 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1333 {
1334 optionlist *ol;
1335 uschar name2[64];
1336 sprintf(CS name2, "*set_%.50s", name);
1337 ol = find_option(name2, oltop, last);
1338 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1339   "Exim internal error: missing set flag for %s", name);
1340 return (data_block == NULL)? (BOOL *)(ol->value) :
1341   (BOOL *)(US data_block + (long int)(ol->value));
1342 }
1343
1344
1345
1346
1347 /*************************************************
1348 *    Output extra characters message and die     *
1349 *************************************************/
1350
1351 /* Called when an option line has junk on the end. Sometimes this is because
1352 the sysadmin thinks comments are permitted.
1353
1354 Arguments:
1355   s          points to the extra characters
1356   t1..t3     strings to insert in the log message
1357
1358 Returns:     doesn't return; dies
1359 */
1360
1361 static void
1362 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1363 {
1364 uschar *comment = US"";
1365 if (*s == '#') comment = US" (# is comment only at line start)";
1366 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1367   "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1368 }
1369
1370
1371
1372 /*************************************************
1373 *              Read rewrite information          *
1374 *************************************************/
1375
1376 /* Each line of rewrite information contains:
1377
1378 .  A complete address in the form user@domain, possibly with
1379    leading * for each part; or alternatively, a regex.
1380
1381 .  A replacement string (which will be expanded).
1382
1383 .  An optional sequence of one-letter flags, indicating which
1384    headers etc. to apply this rule to.
1385
1386 All this is decoded and placed into a control block. The OR of the flags is
1387 maintained in a common word.
1388
1389 Arguments:
1390   p           points to the string that makes up the rule
1391   existflags  points to the overall flag word
1392   isglobal    TRUE if reading global rewrite rules
1393
1394 Returns:      the control block for the parsed rule.
1395 */
1396
1397 static rewrite_rule *
1398 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1399 {
1400 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1401
1402 next->next = NULL;
1403 next->key = string_dequote(&p);
1404
1405 while (isspace(*p)) p++;
1406 if (*p == 0)
1407   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1408     "missing rewrite replacement string");
1409
1410 next->flags = 0;
1411 next->replacement = string_dequote(&p);
1412
1413 while (*p != 0) switch (*p++)
1414   {
1415   case ' ': case '\t': break;
1416
1417   case 'q': next->flags |= rewrite_quit; break;
1418   case 'w': next->flags |= rewrite_whole; break;
1419
1420   case 'h': next->flags |= rewrite_all_headers; break;
1421   case 's': next->flags |= rewrite_sender; break;
1422   case 'f': next->flags |= rewrite_from; break;
1423   case 't': next->flags |= rewrite_to;   break;
1424   case 'c': next->flags |= rewrite_cc;   break;
1425   case 'b': next->flags |= rewrite_bcc;  break;
1426   case 'r': next->flags |= rewrite_replyto; break;
1427
1428   case 'E': next->flags |= rewrite_all_envelope; break;
1429   case 'F': next->flags |= rewrite_envfrom; break;
1430   case 'T': next->flags |= rewrite_envto; break;
1431
1432   case 'Q': next->flags |= rewrite_qualify; break;
1433   case 'R': next->flags |= rewrite_repeat; break;
1434
1435   case 'S':
1436   next->flags |= rewrite_smtp;
1437   if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1438     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1439       "rewrite rule has the S flag but is not a regular expression");
1440   break;
1441
1442   default:
1443   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1444     "unknown rewrite flag character '%c' "
1445     "(could be missing quotes round replacement item)", p[-1]);
1446   break;
1447   }
1448
1449 /* If no action flags are set, set all the "normal" rewrites. */
1450
1451 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1452   next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1453
1454 /* Remember which exist, for optimization, and return the rule */
1455
1456 *existflags |= next->flags;
1457 return next;
1458 }
1459
1460
1461
1462
1463 /*************************************************
1464 *          Read global rewrite information       *
1465 *************************************************/
1466
1467 /* Each line is a single rewrite rule; it is parsed into a control block
1468 by readconf_one_rewrite(), and its flags are ORed into the global flag
1469 word rewrite_existflags. */
1470
1471 void
1472 readconf_rewrites(void)
1473 {
1474 rewrite_rule **chain = &global_rewrite_rules;
1475 uschar *p;
1476
1477 while ((p = get_config_line()) != NULL)
1478   {
1479   rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1480   *chain = next;
1481   chain = &(next->next);
1482   }
1483 }
1484
1485
1486
1487 /*************************************************
1488 *               Read a string                    *
1489 *************************************************/
1490
1491 /* Strings are read into the normal store pool. As long we aren't too
1492 near the end of the current block, the string will just use what is necessary
1493 on the top of the stacking pool, because string_cat() uses the extension
1494 mechanism.
1495
1496 Argument:
1497   s         the rest of the input line
1498   name      the option name (for errors)
1499
1500 Returns:    pointer to the string
1501 */
1502
1503 static uschar *
1504 read_string(const uschar *s, const uschar *name)
1505 {
1506 uschar *yield;
1507 const uschar *ss;
1508
1509 if (*s != '\"') return string_copy(s);
1510
1511 ss = s;
1512 yield = string_dequote(&s);
1513
1514 if (s == ss+1 || s[-1] != '\"')
1515   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1516     "missing quote at end of string value for %s", name);
1517
1518 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1519
1520 return yield;
1521 }
1522
1523
1524 /*************************************************
1525 *            Custom-handler options              *
1526 *************************************************/
1527 static void
1528 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1529 {
1530 if (*str == '$')
1531   smtp_receive_timeout_s = string_copy(str);
1532 else
1533   {
1534   /* "smtp_receive_timeout",     opt_time,        &smtp_receive_timeout */
1535   smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1536   if (smtp_receive_timeout < 0)
1537     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1538       name);
1539   }
1540 }
1541
1542 /*************************************************
1543 *            Handle option line                  *
1544 *************************************************/
1545
1546 /* This function is called from several places to process a line containing the
1547 setting of an option. The first argument is the line to be decoded; it has been
1548 checked not to be empty and not to start with '#'. Trailing newlines and white
1549 space have been removed. The second argument is a pointer to the list of
1550 variable names that are to be recognized, together with their types and
1551 locations, and the third argument gives the number of entries in the list.
1552
1553 The fourth argument is a pointer to a data block. If it is NULL, then the data
1554 values in the options list are absolute addresses. Otherwise, they are byte
1555 offsets in the data block.
1556
1557 String option data may continue onto several lines; this function reads further
1558 data from config_file if necessary.
1559
1560 The yield of this function is normally zero. If a string continues onto
1561 multiple lines, then the data value is permitted to be followed by a comma
1562 or a semicolon (for use in drivers) and the yield is that character.
1563
1564 Arguments:
1565   buffer        contains the configuration line to be handled
1566   oltop         points to the start of the relevant option list
1567   last          one more than the offset of the last item in the option list
1568   data_block    NULL when reading main options => data values in the option
1569                   list are absolute addresses; otherwise they are byte offsets
1570                   in data_block when they have opt_public set; otherwise
1571                   they are byte offsets in data_block->options_block.
1572   unknown_txt   format string to use in panic message for unknown option;
1573                   must contain %s for option name
1574                 if given as NULL, don't panic on unknown option
1575
1576 Returns:        TRUE if an option was read successfully,
1577                 FALSE false for an unknown option if unknown_txt == NULL,
1578                   otherwise panic and die on an unknown option
1579 */
1580
1581 static BOOL
1582 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1583   void *data_block, uschar *unknown_txt)
1584 {
1585 int ptr = 0;
1586 int offset = 0;
1587 int count, type, value;
1588 int issecure = 0;
1589 uid_t uid;
1590 gid_t gid;
1591 BOOL boolvalue = TRUE;
1592 BOOL freesptr = TRUE;
1593 optionlist *ol, *ol2;
1594 struct passwd *pw;
1595 void *reset_point;
1596 int intbase = 0;
1597 uschar *inttype = US"";
1598 uschar *sptr;
1599 uschar *s = buffer;
1600 uschar **str_target;
1601 uschar name[64];
1602 uschar name2[64];
1603
1604 /* There may be leading spaces; thereafter, we expect an option name starting
1605 with a letter. */
1606
1607 while (isspace(*s)) s++;
1608 if (!isalpha(*s))
1609   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1610
1611 /* Read the name of the option, and skip any subsequent white space. If
1612 it turns out that what we read was "hide", set the flag indicating that
1613 this is a secure option, and loop to read the next word. */
1614
1615 for (int n = 0; n < 2; n++)
1616   {
1617   while (isalnum(*s) || *s == '_')
1618     {
1619     if (ptr < sizeof(name)-1) name[ptr++] = *s;
1620     s++;
1621     }
1622   name[ptr] = 0;
1623   while (isspace(*s)) s++;
1624   if (Ustrcmp(name, "hide") != 0) break;
1625   issecure = opt_secure;
1626   ptr = 0;
1627   }
1628
1629 /* Deal with "no_" or "not_" here for booleans */
1630
1631 if (Ustrncmp(name, "no_", 3) == 0)
1632   {
1633   boolvalue = FALSE;
1634   offset = 3;
1635   }
1636
1637 if (Ustrncmp(name, "not_", 4) == 0)
1638   {
1639   boolvalue = FALSE;
1640   offset = 4;
1641   }
1642
1643 /* Search the list for the given name. A non-existent name, or an option that
1644 is set twice, is a disaster. */
1645
1646 if (!(ol = find_option(name + offset, oltop, last)))
1647   {
1648   if (unknown_txt == NULL) return FALSE;
1649   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1650   }
1651
1652 if ((ol->type & opt_set)  && !(ol->type & (opt_rep_con | opt_rep_str)))
1653   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1654     "\"%s\" option set for the second time", name);
1655
1656 ol->type |= opt_set | issecure;
1657 type = ol->type & opt_mask;
1658
1659 /* Types with data values must be followed by '='; the "no[t]_" prefix
1660 applies only to boolean values. */
1661
1662 if (type < opt_bool || type > opt_bool_last)
1663   {
1664   if (offset != 0)
1665     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1666       "negation prefix applied to a non-boolean option");
1667   if (*s == 0)
1668     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1669       "unexpected end of line (data missing) after %s", name);
1670   if (*s != '=')
1671     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1672   }
1673
1674 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1675 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1676 ultimately expands to one of those values. */
1677
1678 else if (*s != 0 && (offset != 0 || *s != '='))
1679   extra_chars_error(s, US"boolean option ", name, US"");
1680
1681 /* Skip white space after = */
1682
1683 if (*s == '=') while (isspace((*(++s))));
1684
1685 /* If there is a data block and the opt_public flag is not set, change
1686 the data block pointer to the private options block. */
1687
1688 if (data_block != NULL && (ol->type & opt_public) == 0)
1689   data_block = (void *)(((driver_instance *)data_block)->options_block);
1690
1691 /* Now get the data according to the type. */
1692
1693 switch (type)
1694   {
1695   /* If a string value is not enclosed in quotes, it consists of
1696   the rest of the current line, verbatim. Otherwise, string escapes
1697   are processed.
1698
1699   A transport is specified as a string, which is then looked up in the
1700   list of transports. A search type is specified as one of a number of
1701   known strings.
1702
1703   A set or rewrite rules for a driver is specified as a string, which is
1704   then parsed into a suitable chain of control blocks.
1705
1706   Uids and gids are specified as strings which are then looked up in the
1707   passwd file. Lists of uids and gids are similarly specified as colon-
1708   separated strings. */
1709
1710   case opt_stringptr:
1711   case opt_uid:
1712   case opt_gid:
1713   case opt_expand_uid:
1714   case opt_expand_gid:
1715   case opt_uidlist:
1716   case opt_gidlist:
1717   case opt_rewrite:
1718
1719   reset_point = sptr = read_string(s, name);
1720
1721   /* Having read a string, we now have several different ways of using it,
1722   depending on the data type, so do another switch. If keeping the actual
1723   string is not required (because it is interpreted), freesptr is set TRUE,
1724   and at the end we reset the pool. */
1725
1726   switch (type)
1727     {
1728     /* If this was a string, set the variable to point to the new string,
1729     and set the flag so its store isn't reclaimed. If it was a list of rewrite
1730     rules, we still keep the string (for printing), and parse the rules into a
1731     control block and flags word. */
1732
1733     case opt_stringptr:
1734     str_target = data_block ? USS (US data_block + (long int)(ol->value))
1735                             : USS (ol->value);
1736     if (ol->type & opt_rep_con)
1737       {
1738       uschar * saved_condition;
1739       /* We already have a condition, we're conducting a crude hack to let
1740       multiple condition rules be chained together, despite storing them in
1741       text form. */
1742       *str_target = string_copy_malloc( (saved_condition = *str_target)
1743         ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1744             saved_condition, sptr)
1745         : sptr);
1746       /* TODO(pdp): there is a memory leak here and just below
1747       when we set 3 or more conditions; I still don't
1748       understand the store mechanism enough to know
1749       what's the safe way to free content from an earlier store.
1750       AFAICT, stores stack, so freeing an early stored item also stores
1751       all data alloc'd after it.  If we knew conditions were adjacent,
1752       we could survive that, but we don't.  So I *think* we need to take
1753       another bit from opt_type to indicate "malloced"; this seems like
1754       quite a hack, especially for this one case.  It also means that
1755       we can't ever reclaim the store from the *first* condition.
1756
1757       Because we only do this once, near process start-up, I'm prepared to
1758       let this slide for the time being, even though it rankles.  */
1759       }
1760     else if (ol->type & opt_rep_str)
1761       {
1762       uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1763       int    sep_i = -(int)sep_o;
1764       const uschar * list = sptr;
1765       uschar * s;
1766       gstring * list_o = NULL;
1767
1768       if (*str_target)
1769         {
1770         list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1771         list_o = string_cat(list_o, *str_target);
1772         }
1773
1774       while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1775         list_o = string_append_listele(list_o, sep_o, s);
1776
1777       if (list_o)
1778         *str_target = string_copy_malloc(string_from_gstring(list_o));
1779       }
1780     else
1781       {
1782       *str_target = sptr;
1783       freesptr = FALSE;
1784       }
1785     break;
1786
1787     case opt_rewrite:
1788     if (data_block)
1789       *USS (US data_block + (long int)(ol->value)) = sptr;
1790     else
1791       *USS (ol->value) = sptr;
1792     freesptr = FALSE;
1793     if (type == opt_rewrite)
1794       {
1795       int sep = 0;
1796       int *flagptr;
1797       uschar *p = sptr;
1798       rewrite_rule **chain;
1799       optionlist *ol3;
1800
1801       sprintf(CS name2, "*%.50s_rules", name);
1802       ol2 = find_option(name2, oltop, last);
1803       sprintf(CS name2, "*%.50s_flags", name);
1804       ol3 = find_option(name2, oltop, last);
1805
1806       if (ol2 == NULL || ol3 == NULL)
1807         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1808           "rewrite rules not available for driver");
1809
1810       if (data_block == NULL)
1811         {
1812         chain = (rewrite_rule **)(ol2->value);
1813         flagptr = (int *)(ol3->value);
1814         }
1815       else
1816         {
1817         chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1818         flagptr = (int *)(US data_block + (long int)(ol3->value));
1819         }
1820
1821       while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1822         {
1823         rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1824         *chain = next;
1825         chain = &(next->next);
1826         }
1827
1828       if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1829         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1830           "non-header rewrite - not allowed at transport time -");
1831       }
1832     break;
1833
1834     /* If it was an expanded uid, see if there is any expansion to be
1835     done by checking for the presence of a $ character. If there is, save it
1836     in the corresponding *expand_user option field. Otherwise, fall through
1837     to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1838     of data. */
1839
1840     case opt_expand_uid:
1841     sprintf(CS name2, "*expand_%.50s", name);
1842     ol2 = find_option(name2, oltop, last);
1843     if (ol2 != NULL)
1844       {
1845       uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1846
1847       if (data_block == NULL)
1848         *((uschar **)(ol2->value)) = ss;
1849       else
1850         *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1851
1852       if (ss != NULL)
1853         {
1854         *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1855         freesptr = FALSE;
1856         break;
1857         }
1858       }
1859
1860     /* Look up a fixed uid, and also make use of the corresponding gid
1861     if a passwd entry is returned and the gid has not been set. */
1862
1863     case opt_uid:
1864     if (!route_finduser(sptr, &pw, &uid))
1865       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1866     if (data_block == NULL)
1867       *((uid_t *)(ol->value)) = uid;
1868     else
1869       *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1870
1871     /* Set the flag indicating a fixed value is set */
1872
1873     *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1874
1875     /* Handle matching gid if we have a passwd entry: done by finding the
1876     same name with terminating "user" changed to "group"; if not found,
1877     ignore. Also ignore if the value is already set. */
1878
1879     if (pw == NULL) break;
1880     Ustrcpy(name+Ustrlen(name)-4, "group");
1881     ol2 = find_option(name, oltop, last);
1882     if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1883         (ol2->type & opt_mask) == opt_expand_gid))
1884       {
1885       BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1886       if (! *set_flag)
1887         {
1888         if (data_block == NULL)
1889           *((gid_t *)(ol2->value)) = pw->pw_gid;
1890         else
1891           *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1892         *set_flag = TRUE;
1893         }
1894       }
1895     break;
1896
1897     /* If it was an expanded gid, see if there is any expansion to be
1898     done by checking for the presence of a $ character. If there is, save it
1899     in the corresponding *expand_user option field. Otherwise, fall through
1900     to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1901     of data. */
1902
1903     case opt_expand_gid:
1904     sprintf(CS name2, "*expand_%.50s", name);
1905     ol2 = find_option(name2, oltop, last);
1906     if (ol2 != NULL)
1907       {
1908       uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1909
1910       if (data_block == NULL)
1911         *((uschar **)(ol2->value)) = ss;
1912       else
1913         *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1914
1915       if (ss != NULL)
1916         {
1917         *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1918         freesptr = FALSE;
1919         break;
1920         }
1921       }
1922
1923     /* Handle freestanding gid */
1924
1925     case opt_gid:
1926     if (!route_findgroup(sptr, &gid))
1927       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1928     if (data_block == NULL)
1929       *((gid_t *)(ol->value)) = gid;
1930     else
1931       *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1932     *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1933     break;
1934
1935     /* If it was a uid list, look up each individual entry, and build
1936     a vector of uids, with a count in the first element. Put the vector
1937     in malloc store so we can free the string. (We are reading into
1938     permanent store already.) */
1939
1940     case opt_uidlist:
1941       {
1942       int count = 1;
1943       uid_t *list;
1944       int ptr = 0;
1945       const uschar *p;
1946       const uschar *op = expand_string (sptr);
1947
1948       if (op == NULL)
1949         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1950           name, expand_string_message);
1951
1952       p = op;
1953       if (*p != 0) count++;
1954       while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1955       list = store_malloc(count*sizeof(uid_t));
1956       list[ptr++] = (uid_t)(count - 1);
1957
1958       if (data_block == NULL)
1959         *((uid_t **)(ol->value)) = list;
1960       else
1961         *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1962
1963       p = op;
1964       while (count-- > 1)
1965         {
1966         int sep = 0;
1967         (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1968         if (!route_finduser(big_buffer, NULL, &uid))
1969           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1970             big_buffer);
1971         list[ptr++] = uid;
1972         }
1973       }
1974     break;
1975
1976     /* If it was a gid list, look up each individual entry, and build
1977     a vector of gids, with a count in the first element. Put the vector
1978     in malloc store so we can free the string. (We are reading into permanent
1979     store already.) */
1980
1981     case opt_gidlist:
1982       {
1983       int count = 1;
1984       gid_t *list;
1985       int ptr = 0;
1986       const uschar *p;
1987       const uschar *op = expand_string (sptr);
1988
1989       if (op == NULL)
1990         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1991           name, expand_string_message);
1992
1993       p = op;
1994       if (*p != 0) count++;
1995       while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1996       list = store_malloc(count*sizeof(gid_t));
1997       list[ptr++] = (gid_t)(count - 1);
1998
1999       if (data_block == NULL)
2000         *((gid_t **)(ol->value)) = list;
2001       else
2002         *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2003
2004       p = op;
2005       while (count-- > 1)
2006         {
2007         int sep = 0;
2008         (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2009         if (!route_findgroup(big_buffer, &gid))
2010           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2011             big_buffer);
2012         list[ptr++] = gid;
2013         }
2014       }
2015     break;
2016     }
2017
2018   /* Release store if the value of the string doesn't need to be kept. */
2019
2020   if (freesptr) store_reset(reset_point);
2021   break;
2022
2023   /* Expanded boolean: if no characters follow, or if there are no dollar
2024   characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2025   save the string for later expansion in the alternate place. */
2026
2027   case opt_expand_bool:
2028   if (*s != 0 && Ustrchr(s, '$') != 0)
2029     {
2030     sprintf(CS name2, "*expand_%.50s", name);
2031     ol2 = find_option(name2, oltop, last);
2032     if (ol2 != NULL)
2033       {
2034       reset_point = sptr = read_string(s, name);
2035       if (data_block == NULL)
2036         *((uschar **)(ol2->value)) = sptr;
2037       else
2038         *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2039       freesptr = FALSE;
2040       break;
2041       }
2042     }
2043   /* Fall through */
2044
2045   /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2046   look for yes/not/true/false. Some booleans are stored in a single bit in
2047   a single int. There's a special fudge for verify settings; without a suffix
2048   they set both xx_sender and xx_recipient. The table points to the sender
2049   value; search subsequently for the recipient. There's another special case:
2050   opt_bool_set also notes when a boolean has been set. */
2051
2052   case opt_bool:
2053   case opt_bit:
2054   case opt_bool_verify:
2055   case opt_bool_set:
2056   if (*s != 0)
2057     {
2058     s = readconf_readname(name2, 64, s);
2059     if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2060       boolvalue = TRUE;
2061     else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2062       boolvalue = FALSE;
2063     else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2064       "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2065     if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2066       US"for boolean option ", name);
2067     }
2068
2069   /* Handle single-bit type. */
2070
2071   if (type == opt_bit)
2072     {
2073     int bit = 1 << ((ol->type >> 16) & 31);
2074     int *ptr = (data_block == NULL)?
2075       (int *)(ol->value) :
2076       (int *)(US data_block + (long int)ol->value);
2077     if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2078     break;
2079     }
2080
2081   /* Handle full BOOL types */
2082
2083   if (data_block == NULL)
2084     *((BOOL *)(ol->value)) = boolvalue;
2085   else
2086     *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2087
2088   /* Verify fudge */
2089
2090   if (type == opt_bool_verify)
2091     {
2092     sprintf(CS name2, "%.50s_recipient", name + offset);
2093     ol2 = find_option(name2, oltop, last);
2094     if (ol2 != NULL)
2095       {
2096       if (data_block == NULL)
2097         *((BOOL *)(ol2->value)) = boolvalue;
2098       else
2099         *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2100       }
2101     }
2102
2103   /* Note that opt_bool_set type is set, if there is somewhere to do so */
2104
2105   else if (type == opt_bool_set)
2106     {
2107     sprintf(CS name2, "*set_%.50s", name + offset);
2108     ol2 = find_option(name2, oltop, last);
2109     if (ol2 != NULL)
2110       {
2111       if (data_block == NULL)
2112         *((BOOL *)(ol2->value)) = TRUE;
2113       else
2114         *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2115       }
2116     }
2117   break;
2118
2119   /* Octal integer */
2120
2121   case opt_octint:
2122   intbase = 8;
2123   inttype = US"octal ";
2124
2125   /*  Integer: a simple(ish) case; allow octal and hex formats, and
2126   suffixes K, M, G, and T.  The different types affect output, not input. */
2127
2128   case opt_mkint:
2129   case opt_int:
2130     {
2131     uschar *endptr;
2132     long int lvalue;
2133
2134     errno = 0;
2135     lvalue = strtol(CS s, CSS &endptr, intbase);
2136
2137     if (endptr == s)
2138       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2139         inttype, name);
2140
2141     if (errno != ERANGE && *endptr)
2142       {
2143       uschar * mp = US"TtGgMmKk\0";     /* YyZzEePpTtGgMmKk */
2144
2145       if ((mp = Ustrchr(mp, *endptr)))
2146         {
2147         endptr++;
2148         do
2149           {
2150           if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2151             {
2152             errno = ERANGE;
2153             break;
2154             }
2155           lvalue *= 1024;
2156           }
2157         while (*(mp += 2));
2158         }
2159       }
2160
2161     if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2162       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2163         "absolute value of integer \"%s\" is too large (overflow)", s);
2164
2165     while (isspace(*endptr)) endptr++;
2166     if (*endptr)
2167       extra_chars_error(endptr, inttype, US"integer value for ", name);
2168
2169     value = (int)lvalue;
2170     }
2171
2172   if (data_block)
2173     *(int *)(US data_block + (long int)ol->value) = value;
2174   else
2175     *(int *)ol->value = value;
2176   break;
2177
2178   /*  Integer held in K: again, allow formats and suffixes as above. */
2179
2180   case opt_Kint:
2181     {
2182     uschar *endptr;
2183     errno = 0;
2184     int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2185
2186     if (endptr == s)
2187       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2188         inttype, name);
2189
2190     if (errno != ERANGE && *endptr)
2191       {
2192       uschar * mp = US"ZzEePpTtGgMmKk\0";       /* YyZzEePpTtGgMmKk */
2193
2194       if ((mp = Ustrchr(mp, *endptr)))
2195         {
2196         endptr++;
2197         while (*(mp += 2))
2198           {
2199           if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2200             {
2201             errno = ERANGE;
2202             break;
2203             }
2204           lvalue *= 1024;
2205           }
2206         }
2207       else
2208         lvalue = (lvalue + 512)/1024;
2209       }
2210
2211     if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2212       "absolute value of integer \"%s\" is too large (overflow)", s);
2213
2214     while (isspace(*endptr)) endptr++;
2215     if (*endptr != 0)
2216       extra_chars_error(endptr, inttype, US"integer value for ", name);
2217
2218     if (data_block)
2219       *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2220     else
2221       *(int_eximarith_t *)ol->value = lvalue;
2222     break;
2223     }
2224
2225   /*  Fixed-point number: held to 3 decimal places. */
2226
2227   case opt_fixed:
2228   if (sscanf(CS s, "%d%n", &value, &count) != 1)
2229     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2230       "fixed-point number expected for %s", name);
2231
2232   if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2233     "integer \"%s\" is too large (overflow)", s);
2234
2235   value *= 1000;
2236
2237   if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2238     "integer \"%s\" is too large (overflow)", s);
2239
2240   /* We get a coverity error here for using count, as it derived
2241   from the tainted buffer pointed to by s, as parsed by sscanf().
2242   By the definition of sscanf we must be accessing between start
2243   and end of s (assuming it is nul-terminated...) so ignore the error.  */
2244   /* coverity[tainted_data] */
2245   if (s[count] == '.')
2246     {
2247     int d = 100;
2248     while (isdigit(s[++count]))
2249       {
2250       value += (s[count] - '0') * d;
2251       d /= 10;
2252       }
2253     }
2254
2255   while (isspace(s[count])) count++;
2256
2257   if (s[count] != 0)
2258     extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2259
2260   if (data_block == NULL)
2261     *((int *)(ol->value)) = value;
2262   else
2263     *((int *)(US data_block + (long int)(ol->value))) = value;
2264   break;
2265
2266   /* There's a special routine to read time values. */
2267
2268   case opt_time:
2269   value = readconf_readtime(s, 0, FALSE);
2270   if (value < 0)
2271     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2272       name);
2273   if (data_block == NULL)
2274     *((int *)(ol->value)) = value;
2275   else
2276     *((int *)(US data_block + (long int)(ol->value))) = value;
2277   break;
2278
2279   /* A time list is a list of colon-separated times, with the first
2280   element holding the size of the list and the second the number of
2281   entries used. */
2282
2283   case opt_timelist:
2284     {
2285     int count = 0;
2286     int *list = (data_block == NULL)?
2287       (int *)(ol->value) :
2288       (int *)(US data_block + (long int)(ol->value));
2289
2290     if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2291       {
2292       int terminator = 0;
2293       uschar *snext = Ustrchr(s, ':');
2294       if (snext != NULL)
2295         {
2296         uschar *ss = snext;
2297         while (ss > s && isspace(ss[-1])) ss--;
2298         terminator = *ss;
2299         }
2300       value = readconf_readtime(s, terminator, FALSE);
2301       if (value < 0)
2302         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2303           name);
2304       if (count > 1 && value <= list[count])
2305         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2306           "time value out of order for %s", name);
2307       list[count+1] = value;
2308       if (snext == NULL) break;
2309       s = snext + 1;
2310       while (isspace(*s)) s++;
2311       }
2312
2313     if (count > list[0] - 2)
2314       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2315         name);
2316     if (count > 0 && list[2] == 0) count = 0;
2317     list[1] = count;
2318     break;
2319     }
2320
2321   case opt_func:
2322     {
2323     void (*fn)() = ol->value;
2324     fn(name, s);
2325     break;
2326     }
2327   }
2328
2329 return TRUE;
2330 }
2331
2332
2333
2334 /*************************************************
2335 *               Print a time value               *
2336 *************************************************/
2337
2338 /*
2339 Argument:  a time value in seconds
2340 Returns:   pointer to a fixed buffer containing the time as a string,
2341            in readconf_readtime() format
2342 */
2343
2344 uschar *
2345 readconf_printtime(int t)
2346 {
2347 int s, m, h, d, w;
2348 uschar *p = time_buffer;
2349
2350 if (t < 0)
2351   {
2352   *p++ = '-';
2353   t = -t;
2354   }
2355
2356 s = t % 60;
2357 t /= 60;
2358 m = t % 60;
2359 t /= 60;
2360 h = t % 24;
2361 t /= 24;
2362 d = t % 7;
2363 w = t/7;
2364
2365 if (w > 0) p += sprintf(CS p, "%dw", w);
2366 if (d > 0) p += sprintf(CS p, "%dd", d);
2367 if (h > 0) p += sprintf(CS p, "%dh", h);
2368 if (m > 0) p += sprintf(CS p, "%dm", m);
2369 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2370
2371 return time_buffer;
2372 }
2373
2374
2375
2376 /*************************************************
2377 *      Print an individual option value          *
2378 *************************************************/
2379
2380 /* This is used by the -bP option, so prints to the standard output.
2381 The entire options list is passed in as an argument, because some options come
2382 in pairs - typically uid/gid settings, which can either be explicit numerical
2383 values, or strings to be expanded later. If the numerical value is unset,
2384 search for "*expand_<name>" to see if there is a string equivalent.
2385
2386 Arguments:
2387   ol             option entry, or NULL for an unknown option
2388   name           option name
2389   options_block  NULL for main configuration options; otherwise points to
2390                    a driver block; if the option doesn't have opt_public
2391                    set, then options_block->options_block is where the item
2392                    resides.
2393   oltop          points to the option list in which ol exists
2394   last           one more than the offset of the last entry in optop
2395   no_labels      do not show "foo = " at the start.
2396
2397 Returns:         boolean success
2398 */
2399
2400 static BOOL
2401 print_ol(optionlist *ol, uschar *name, void *options_block,
2402   optionlist *oltop, int last, BOOL no_labels)
2403 {
2404 struct passwd *pw;
2405 struct group *gr;
2406 optionlist *ol2;
2407 void *value;
2408 uid_t *uidlist;
2409 gid_t *gidlist;
2410 uschar *s;
2411 uschar name2[64];
2412
2413 if (!ol)
2414   {
2415   printf("%s is not a known option\n", name);
2416   return FALSE;
2417   }
2418
2419 /* Non-admin callers cannot see options that have been flagged secure by the
2420 "hide" prefix. */
2421
2422 if (!f.admin_user && ol->type & opt_secure)
2423   {
2424   if (no_labels)
2425     printf("%s\n", hidden);
2426   else
2427     printf("%s = %s\n", name, hidden);
2428   return TRUE;
2429   }
2430
2431 /* Else show the value of the option */
2432
2433 value = ol->value;
2434 if (options_block)
2435   {
2436   if (!(ol->type & opt_public))
2437     options_block = (void *)(((driver_instance *)options_block)->options_block);
2438   value = (void *)(US options_block + (long int)value);
2439   }
2440
2441 switch(ol->type & opt_mask)
2442   {
2443   case opt_stringptr:
2444   case opt_rewrite:        /* Show the text value */
2445     s = *(USS value);
2446     if (!no_labels) printf("%s = ", name);
2447     printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2448     break;
2449
2450   case opt_int:
2451     if (!no_labels) printf("%s = ", name);
2452     printf("%d\n", *((int *)value));
2453     break;
2454
2455   case opt_mkint:
2456     {
2457     int x = *((int *)value);
2458     if (x != 0 && (x & 1023) == 0)
2459       {
2460       int c = 'K';
2461       x >>= 10;
2462       if ((x & 1023) == 0)
2463         {
2464         c = 'M';
2465         x >>= 10;
2466         }
2467       if (!no_labels) printf("%s = ", name);
2468       printf("%d%c\n", x, c);
2469       }
2470     else
2471       {
2472       if (!no_labels) printf("%s = ", name);
2473       printf("%d\n", x);
2474       }
2475     }
2476     break;
2477
2478   case opt_Kint:
2479     {
2480     int_eximarith_t x = *((int_eximarith_t *)value);
2481     if (!no_labels) printf("%s = ", name);
2482     if (x == 0) printf("0\n");
2483     else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2484     else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2485     else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2486     else printf(PR_EXIM_ARITH "K\n", x);
2487     }
2488     break;
2489
2490   case opt_octint:
2491     if (!no_labels) printf("%s = ", name);
2492     printf("%#o\n", *((int *)value));
2493     break;
2494
2495   /* Can be negative only when "unset", in which case integer */
2496
2497   case opt_fixed:
2498     {
2499     int x = *((int *)value);
2500     int f = x % 1000;
2501     int d = 100;
2502     if (x < 0) printf("%s =\n", name); else
2503       {
2504       if (!no_labels) printf("%s = ", name);
2505       printf("%d.", x/1000);
2506       do
2507         {
2508         printf("%d", f/d);
2509         f %= d;
2510         d /= 10;
2511         }
2512       while (f != 0);
2513       printf("\n");
2514       }
2515     }
2516     break;
2517
2518   /* If the numerical value is unset, try for the string value */
2519
2520   case opt_expand_uid:
2521     if (! *get_set_flag(name, oltop, last, options_block))
2522       {
2523       sprintf(CS name2, "*expand_%.50s", name);
2524       if ((ol2 = find_option(name2, oltop, last)))
2525         {
2526         void *value2 = ol2->value;
2527         if (options_block)
2528           value2 = (void *)(US options_block + (long int)value2);
2529         s = *(USS value2);
2530         if (!no_labels) printf("%s = ", name);
2531         printf("%s\n", s ? string_printing(s) : US"");
2532         break;
2533         }
2534       }
2535
2536     /* Else fall through */
2537
2538   case opt_uid:
2539     if (!no_labels) printf("%s = ", name);
2540     if (! *get_set_flag(name, oltop, last, options_block))
2541       printf("\n");
2542     else
2543       if ((pw = getpwuid(*((uid_t *)value))))
2544         printf("%s\n", pw->pw_name);
2545       else
2546         printf("%ld\n", (long int)(*((uid_t *)value)));
2547     break;
2548
2549   /* If the numerical value is unset, try for the string value */
2550
2551   case opt_expand_gid:
2552     if (! *get_set_flag(name, oltop, last, options_block))
2553       {
2554       sprintf(CS name2, "*expand_%.50s", name);
2555       if (  (ol2 = find_option(name2, oltop, last))
2556          && (ol2->type & opt_mask) == opt_stringptr)
2557         {
2558         void *value2 = ol2->value;
2559         if (options_block)
2560           value2 = (void *)(US options_block + (long int)value2);
2561         s = *(USS value2);
2562         if (!no_labels) printf("%s = ", name);
2563         printf("%s\n", s ? string_printing(s) : US"");
2564         break;
2565         }
2566       }
2567
2568     /* Else fall through */
2569
2570   case opt_gid:
2571     if (!no_labels) printf("%s = ", name);
2572     if (! *get_set_flag(name, oltop, last, options_block))
2573       printf("\n");
2574     else
2575       if ((gr = getgrgid(*((int *)value))))
2576         printf("%s\n", gr->gr_name);
2577       else
2578          printf("%ld\n", (long int)(*((int *)value)));
2579     break;
2580
2581   case opt_uidlist:
2582     uidlist = *((uid_t **)value);
2583     if (!no_labels) printf("%s =", name);
2584     if (uidlist)
2585       {
2586       uschar sep = no_labels ? '\0' : ' ';
2587       for (int i = 1; i <= (int)(uidlist[0]); i++)
2588         {
2589         uschar *name = NULL;
2590         if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2591         if (sep != '\0') printf("%c", sep);
2592         if (name) printf("%s", name);
2593         else printf("%ld", (long int)(uidlist[i]));
2594         sep = ':';
2595         }
2596       }
2597     printf("\n");
2598     break;
2599
2600   case opt_gidlist:
2601     gidlist = *((gid_t **)value);
2602     if (!no_labels) printf("%s =", name);
2603     if (gidlist)
2604       {
2605       uschar sep = no_labels ? '\0' : ' ';
2606       for (int i = 1; i <= (int)(gidlist[0]); i++)
2607         {
2608         uschar *name = NULL;
2609         if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2610         if (sep != '\0') printf("%c", sep);
2611         if (name) printf("%s", name);
2612         else printf("%ld", (long int)(gidlist[i]));
2613         sep = ':';
2614         }
2615       }
2616     printf("\n");
2617     break;
2618
2619   case opt_time:
2620     if (!no_labels) printf("%s = ", name);
2621     printf("%s\n", readconf_printtime(*((int *)value)));
2622     break;
2623
2624   case opt_timelist:
2625     {
2626     int *list = (int *)value;
2627     if (!no_labels) printf("%s = ", name);
2628     for (int i = 0; i < list[1]; i++)
2629       printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2630     printf("\n");
2631     }
2632     break;
2633
2634   case opt_bit:
2635     printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2636       "" : "no_", name);
2637     break;
2638
2639   case opt_expand_bool:
2640     sprintf(CS name2, "*expand_%.50s", name);
2641     if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2642       {
2643       void *value2 = ol2->value;
2644       if (options_block)
2645         value2 = (void *)(US options_block + (long int)value2);
2646       s = *(USS value2);
2647       if (s)
2648         {
2649         if (!no_labels) printf("%s = ", name);
2650         printf("%s\n", string_printing(s));
2651         break;
2652         }
2653       /* s == NULL => string not set; fall through */
2654       }
2655
2656     /* Fall through */
2657
2658   case opt_bool:
2659   case opt_bool_verify:
2660   case opt_bool_set:
2661     printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2662     break;
2663   }
2664 return TRUE;
2665 }
2666
2667
2668
2669 /*************************************************
2670 *        Print value from main configuration     *
2671 *************************************************/
2672
2673 /* This function, called as a result of encountering the -bP option,
2674 causes the value of any main configuration variable to be output if the
2675 second argument is NULL. There are some special values:
2676
2677   all                print all main configuration options
2678   config_file        print the name of the configuration file
2679                      (configure_file will still work, for backward
2680                      compatibility)
2681   routers            print the routers' configurations
2682   transports         print the transports' configuration
2683   authenticators     print the authenticators' configuration
2684   macros             print the macros' configuration
2685   router_list        print a list of router names
2686   transport_list     print a list of transport names
2687   authenticator_list print a list of authentication mechanism names
2688   macro_list         print a list of macro names
2689   +name              print a named list item
2690   local_scan         print the local_scan options
2691   config             print the configuration as it is parsed
2692   environment        print the used execution environment
2693
2694 If the second argument is not NULL, it must be one of "router", "transport",
2695 "authenticator" or "macro" in which case the first argument identifies the
2696 driver whose options are to be printed.
2697
2698 Arguments:
2699   name        option name if type == NULL; else driver name
2700   type        NULL or driver type name, as described above
2701   no_labels   avoid the "foo = " at the start of an item
2702
2703 Returns:      Boolean success
2704 */
2705
2706 BOOL
2707 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2708 {
2709 BOOL names_only = FALSE;
2710 optionlist *ol2 = NULL;
2711 driver_instance *d = NULL;
2712 int size = 0;
2713
2714 if (!type)
2715   {
2716   if (*name == '+')
2717     {
2718     tree_node *t;
2719     BOOL found = FALSE;
2720     static uschar *types[] = { US"address", US"domain", US"host",
2721       US"localpart" };
2722     static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2723       &hostlist_anchor, &localpartlist_anchor };
2724
2725     for (int i = 0; i < 4; i++)
2726       if ((t = tree_search(*(anchors[i]), name+1)))
2727         {
2728         found = TRUE;
2729         if (no_labels)
2730           printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2731         else
2732           printf("%slist %s = %s\n", types[i], name+1,
2733             ((namedlist_block *)(t->data.ptr))->string);
2734         }
2735
2736     if (!found)
2737       printf("no address, domain, host, or local part list called \"%s\" "
2738         "exists\n", name+1);
2739
2740     return found;
2741     }
2742
2743   if (  Ustrcmp(name, "configure_file") == 0
2744      || Ustrcmp(name, "config_file") == 0)
2745     {
2746     printf("%s\n", CS config_main_filename);
2747     return TRUE;
2748     }
2749
2750   if (Ustrcmp(name, "all") == 0)
2751     {
2752     for (optionlist * ol = optionlist_config;
2753          ol < optionlist_config + nelem(optionlist_config); ol++)
2754       if (!(ol->type & opt_hidden))
2755         (void) print_ol(ol, US ol->name, NULL,
2756                   optionlist_config, nelem(optionlist_config),
2757                   no_labels);
2758     return TRUE;
2759     }
2760
2761   if (Ustrcmp(name, "local_scan") == 0)
2762     {
2763 #ifndef LOCAL_SCAN_HAS_OPTIONS
2764     printf("local_scan() options are not supported\n");
2765     return FALSE;
2766 #else
2767     for (optionlist * ol = local_scan_options;
2768          ol < local_scan_options + local_scan_options_count; ol++)
2769       (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2770                   local_scan_options_count, no_labels);
2771     return TRUE;
2772 #endif
2773     }
2774
2775   if (Ustrcmp(name, "config") == 0)
2776     {
2777     print_config(f.admin_user, no_labels);
2778     return TRUE;
2779     }
2780
2781   if (Ustrcmp(name, "routers") == 0)
2782     {
2783     type = US"router";
2784     name = NULL;
2785     }
2786   else if (Ustrcmp(name, "transports") == 0)
2787     {
2788     type = US"transport";
2789     name = NULL;
2790     }
2791   else if (Ustrcmp(name, "authenticators") == 0)
2792     {
2793     type = US"authenticator";
2794     name = NULL;
2795     }
2796   else if (Ustrcmp(name, "macros") == 0)
2797     {
2798     type = US"macro";
2799     name = NULL;
2800     }
2801   else if (Ustrcmp(name, "router_list") == 0)
2802     {
2803     type = US"router";
2804     name = NULL;
2805     names_only = TRUE;
2806     }
2807   else if (Ustrcmp(name, "transport_list") == 0)
2808     {
2809     type = US"transport";
2810     name = NULL;
2811     names_only = TRUE;
2812     }
2813   else if (Ustrcmp(name, "authenticator_list") == 0)
2814     {
2815     type = US"authenticator";
2816     name = NULL;
2817     names_only = TRUE;
2818     }
2819   else if (Ustrcmp(name, "macro_list") == 0)
2820     {
2821     type = US"macro";
2822     name = NULL;
2823     names_only = TRUE;
2824     }
2825   else if (Ustrcmp(name, "environment") == 0)
2826     {
2827     if (environ)
2828       {
2829       uschar ** p;
2830       for (p = USS environ; *p; p++) ;
2831       qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2832
2833       for (p = USS environ; *p; p++)
2834         {
2835         uschar * q;
2836         if (no_labels && (q = Ustrchr(*p, '='))) *q  = '\0';
2837         puts(CS *p);
2838         }
2839       }
2840     return TRUE;
2841     }
2842
2843   else
2844     return print_ol(find_option(name,
2845       optionlist_config, nelem(optionlist_config)),
2846       name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2847   }
2848
2849 /* Handle the options for a router or transport. Skip options that are flagged
2850 as hidden. Some of these are options with names starting with '*', used for
2851 internal alternative representations of other options (which the printing
2852 function will sort out). Others are synonyms kept for backward compatibility.
2853 */
2854
2855 if (Ustrcmp(type, "router") == 0)
2856   {
2857   d = (driver_instance *)routers;
2858   ol2 = optionlist_routers;
2859   size = optionlist_routers_size;
2860   }
2861 else if (Ustrcmp(type, "transport") == 0)
2862   {
2863   d = (driver_instance *)transports;
2864   ol2 = optionlist_transports;
2865   size = optionlist_transports_size;
2866   }
2867 else if (Ustrcmp(type, "authenticator") == 0)
2868   {
2869   d = (driver_instance *)auths;
2870   ol2 = optionlist_auths;
2871   size = optionlist_auths_size;
2872   }
2873
2874 else if (Ustrcmp(type, "macro") == 0)
2875   {
2876   /* People store passwords in macros and they were previously not available
2877   for printing.  So we have an admin_users restriction. */
2878   if (!f.admin_user)
2879     {
2880     fprintf(stderr, "exim: permission denied\n");
2881     return FALSE;
2882     }
2883   for (macro_item * m = macros; m; m = m->next)
2884     if (!name || Ustrcmp(name, m->name) == 0)
2885       {
2886       if (names_only)
2887         printf("%s\n", CS m->name);
2888       else if (no_labels)
2889         printf("%s\n", CS m->replacement);
2890       else
2891         printf("%s=%s\n", CS m->name, CS m->replacement);
2892       if (name)
2893         return TRUE;
2894       }
2895   if (!name) return TRUE;
2896
2897   printf("%s %s not found\n", type, name);
2898   return FALSE;
2899   }
2900
2901 if (names_only)
2902   {
2903   for (; d; d = d->next) printf("%s\n", CS d->name);
2904   return TRUE;
2905   }
2906
2907 /* Either search for a given driver, or print all of them */
2908
2909 for (; d; d = d->next)
2910   {
2911   BOOL rc = FALSE;
2912   if (!name)
2913     printf("\n%s %s:\n", d->name, type);
2914   else if (Ustrcmp(d->name, name) != 0) continue;
2915
2916   for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2917     if (!(ol->type & opt_hidden))
2918       rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2919
2920   for (optionlist * ol = d->info->options;
2921        ol < d->info->options + *(d->info->options_count); ol++)
2922     if (!(ol->type & opt_hidden))
2923       rc |= print_ol(ol, US ol->name, d, d->info->options,
2924                     *d->info->options_count, no_labels);
2925
2926   if (name) return rc;
2927   }
2928 if (!name) return TRUE;
2929
2930 printf("%s %s not found\n", type, name);
2931 return FALSE;
2932 }
2933
2934
2935
2936 /*************************************************
2937 *          Read a named list item                *
2938 *************************************************/
2939
2940 /* This function reads a name and a list (i.e. string). The name is used to
2941 save the list in a tree, sorted by its name. Each entry also has a number,
2942 which can be used for caching tests, but if the string contains any expansion
2943 items other than $key, the number is set negative to inhibit caching. This
2944 mechanism is used for domain, host, and address lists that are referenced by
2945 the "+name" syntax.
2946
2947 Arguments:
2948   anchorp     points to the tree anchor
2949   numberp     points to the current number for this tree
2950   max         the maximum number permitted
2951   s           the text of the option line, starting immediately after the name
2952                 of the list type
2953   tname       the name of the list type, for messages
2954
2955 Returns:      nothing
2956 */
2957
2958 static void
2959 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2960   uschar *tname)
2961 {
2962 BOOL forcecache = FALSE;
2963 uschar *ss;
2964 tree_node *t;
2965 namedlist_block *nb = store_get(sizeof(namedlist_block));
2966
2967 if (Ustrncmp(s, "_cache", 6) == 0)
2968   {
2969   forcecache = TRUE;
2970   s += 6;
2971   }
2972
2973 if (!isspace(*s))
2974   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2975
2976 if (*numberp >= max)
2977  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2978    tname, max);
2979
2980 while (isspace(*s)) s++;
2981 ss = s;
2982 while (isalnum(*s) || *s == '_') s++;
2983 t = store_get(sizeof(tree_node) + s-ss);
2984 Ustrncpy(t->name, ss, s-ss);
2985 t->name[s-ss] = 0;
2986 while (isspace(*s)) s++;
2987
2988 if (!tree_insertnode(anchorp, t))
2989   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2990     "duplicate name \"%s\" for a named %s", t->name, tname);
2991
2992 t->data.ptr = nb;
2993 nb->number = *numberp;
2994 *numberp += 1;
2995
2996 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2997   "missing '=' after \"%s\"", t->name);
2998 while (isspace(*s)) s++;
2999 nb->string = read_string(s, t->name);
3000 nb->cache_data = NULL;
3001
3002 /* Check the string for any expansions; if any are found, mark this list
3003 uncacheable unless the user has explicited forced caching. */
3004
3005 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3006 }
3007
3008
3009
3010
3011 /*************************************************
3012 *        Unpick data for a rate limit            *
3013 *************************************************/
3014
3015 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3016 separate values.
3017
3018 Arguments:
3019   s            string, in the form t,b,f,l
3020                where t is the threshold (integer)
3021                b is the initial delay (time)
3022                f is the multiplicative factor (fixed point)
3023                k is the maximum time (time)
3024   threshold    where to store threshold
3025   base         where to store base in milliseconds
3026   factor       where to store factor in milliseconds
3027   limit        where to store limit
3028
3029 Returns:       nothing (panics on error)
3030 */
3031
3032 static void
3033 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3034   int *limit)
3035 {
3036 uschar bstring[16], lstring[16];
3037
3038 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3039     factor, lstring) == 4)
3040   {
3041   *base = readconf_readtime(bstring, 0, TRUE);
3042   *limit = readconf_readtime(lstring, 0, TRUE);
3043   if (*base >= 0 && *limit >= 0) return;
3044   }
3045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3046 }
3047
3048
3049
3050
3051 /*************************************************
3052 *       Drop privs for checking TLS config      *
3053 *************************************************/
3054
3055 /* We want to validate TLS options during readconf, but do not want to be
3056 root when we call into the TLS library, in case of library linkage errors
3057 which cause segfaults; before this check, those were always done as the Exim
3058 runtime user and it makes sense to continue with that.
3059
3060 Assumes:  tls_require_ciphers has been set, if it will be
3061           exim_user has been set, if it will be
3062           exim_group has been set, if it will be
3063
3064 Returns:  bool for "okay"; false will cause caller to immediately exit.
3065 */
3066
3067 #ifdef SUPPORT_TLS
3068 static BOOL
3069 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3070 {
3071 const uschar *errmsg;
3072 pid_t pid;
3073 int rc, status;
3074 void (*oldsignal)(int);
3075
3076 /* If TLS will never be used, no point checking ciphers */
3077
3078 if (  !tls_advertise_hosts
3079    || !*tls_advertise_hosts
3080    || Ustrcmp(tls_advertise_hosts, ":") == 0
3081    )
3082   return TRUE;
3083 else if (!nowarn && !tls_certificate)
3084   log_write(0, LOG_MAIN,
3085     "Warning: No server certificate defined; will use a selfsigned one.\n"
3086     " Suggested action: either install a certificate or change tls_advertise_hosts option");
3087
3088 oldsignal = signal(SIGCHLD, SIG_DFL);
3089
3090 fflush(NULL);
3091 if ((pid = fork()) < 0)
3092   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3093
3094 if (pid == 0)
3095   {
3096   /* in some modes, will have dropped privilege already */
3097   if (!geteuid())
3098     exim_setugid(exim_uid, exim_gid, FALSE,
3099         US"calling tls_validate_require_cipher");
3100
3101   if ((errmsg = tls_validate_require_cipher()))
3102     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3103         "tls_require_ciphers invalid: %s", errmsg);
3104   fflush(NULL);
3105   _exit(0);
3106   }
3107
3108 do {
3109   rc = waitpid(pid, &status, 0);
3110 } while (rc < 0 && errno == EINTR);
3111
3112 DEBUG(D_tls)
3113   debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3114       (int)pid, status);
3115
3116 signal(SIGCHLD, oldsignal);
3117
3118 return status == 0;
3119 }
3120 #endif /* SUPPORT_TLS */
3121
3122
3123
3124
3125 /*************************************************
3126 *         Read main configuration options        *
3127 *************************************************/
3128
3129 /* This function is the first to be called for configuration reading. It
3130 opens the configuration file and reads general configuration settings until
3131 it reaches the end of the configuration section. The file is then left open so
3132 that the remaining configuration data can subsequently be read if needed for
3133 this run of Exim.
3134
3135 The configuration file must be owned either by root or exim, and be writeable
3136 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3137 in the config file, so the test is done on the compiled in values. A slight
3138 anomaly, to be carefully documented.
3139
3140 The name of the configuration file is taken from a list that is included in the
3141 binary of Exim. It can be altered from the command line, but if that is done,
3142 root privilege is immediately withdrawn unless the caller is root or exim.
3143 The first file on the list that exists is used.
3144
3145 For use on multiple systems that share file systems, first look for a
3146 configuration file whose name has the current node name on the end. If that is
3147 not found, try the generic name. For really contorted configurations, that run
3148 multiple Exims with different uid settings, first try adding the effective uid
3149 before the node name. These complications are going to waste resources on most
3150 systems. Therefore they are available only when requested by compile-time
3151 options. */
3152
3153 void
3154 readconf_main(BOOL nowarn)
3155 {
3156 int sep = 0;
3157 struct stat statbuf;
3158 uschar *s, *filename;
3159 const uschar *list = config_main_filelist;
3160
3161 /* Loop through the possible file names */
3162
3163 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3164   {
3165
3166   /* Cut out all the fancy processing unless specifically wanted */
3167
3168   #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3169   uschar *suffix = filename + Ustrlen(filename);
3170
3171   /* Try for the node-specific file if a node name exists */
3172
3173   #ifdef CONFIGURE_FILE_USE_NODE
3174   struct utsname uts;
3175   if (uname(&uts) >= 0)
3176     {
3177     #ifdef CONFIGURE_FILE_USE_EUID
3178     sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3179     config_file = Ufopen(filename, "rb");
3180     if (config_file == NULL)
3181     #endif  /* CONFIGURE_FILE_USE_EUID */
3182       {
3183       sprintf(CS suffix, ".%.256s", uts.nodename);
3184       config_file = Ufopen(filename, "rb");
3185       }
3186     }
3187   #endif  /* CONFIGURE_FILE_USE_NODE */
3188
3189   /* Otherwise, try the generic name, possibly with the euid added */
3190
3191   #ifdef CONFIGURE_FILE_USE_EUID
3192   if (config_file == NULL)
3193     {
3194     sprintf(CS suffix, ".%ld", (long int)original_euid);
3195     config_file = Ufopen(filename, "rb");
3196     }
3197   #endif  /* CONFIGURE_FILE_USE_EUID */
3198
3199   /* Finally, try the unadorned name */
3200
3201   if (config_file == NULL)
3202     {
3203     *suffix = 0;
3204     config_file = Ufopen(filename, "rb");
3205     }
3206   #else  /* if neither defined */
3207
3208   /* This is the common case when the fancy processing is not included. */
3209
3210   config_file = Ufopen(filename, "rb");
3211   #endif
3212
3213   /* If the file does not exist, continue to try any others. For any other
3214   error, break out (and die). */
3215
3216   if (config_file != NULL || errno != ENOENT) break;
3217   }
3218
3219 /* On success, save the name for verification; config_filename is used when
3220 logging configuration errors (it changes for .included files) whereas
3221 config_main_filename is the name shown by -bP. Failure to open a configuration
3222 file is a serious disaster. */
3223
3224 if (config_file)
3225   {
3226   uschar *last_slash = Ustrrchr(filename, '/');
3227   config_filename = config_main_filename = string_copy(filename);
3228
3229   /* The config_main_directory we need for the $config_dir expansion.
3230   config_main_filename we need for $config_file expansion.
3231   And config_dir is the directory of the current configuration, used for
3232   relative .includes. We do need to know it's name, as we change our working
3233   directory later. */
3234
3235   if (filename[0] == '/')
3236     config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3237   else
3238     {
3239       /* relative configuration file name: working dir + / + basename(filename) */
3240
3241       uschar buf[PATH_MAX];
3242       gstring * g;
3243
3244       if (os_getcwd(buf, PATH_MAX) == NULL)
3245         {
3246         perror("exim: getcwd");
3247         exit(EXIT_FAILURE);
3248         }
3249       g = string_cat(NULL, buf);
3250
3251       /* If the dir does not end with a "/", append one */
3252       if (g->s[g->ptr-1] != '/')
3253         g = string_catn(g, US"/", 1);
3254
3255       /* If the config file contains a "/", extract the directory part */
3256       if (last_slash)
3257         g = string_catn(g, filename, last_slash - filename);
3258
3259       config_main_directory = string_from_gstring(g);
3260     }
3261   config_directory = config_main_directory;
3262   }
3263 else
3264   {
3265   if (filename == NULL)
3266     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3267       "%s", config_main_filelist);
3268   else
3269     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3270       "configuration file %s", filename));
3271   }
3272
3273 /* Now, once we found and opened our configuration file, we change the directory
3274 to a safe place. Later we change to $spool_directory. */
3275
3276 if (Uchdir("/") < 0)
3277   {
3278   perror("exim: chdir `/': ");
3279   exit(EXIT_FAILURE);
3280   }
3281
3282 /* Check the status of the file we have opened, if we have retained root
3283 privileges and the file isn't /dev/null (which *should* be 0666). */
3284
3285 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3286   {
3287   if (fstat(fileno(config_file), &statbuf) != 0)
3288     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3289       big_buffer);
3290
3291   if ((statbuf.st_uid != root_uid                /* owner not root */
3292        #ifdef CONFIGURE_OWNER
3293        && statbuf.st_uid != config_uid           /* owner not the special one */
3294        #endif
3295          ) ||                                    /* or */
3296       (statbuf.st_gid != root_gid                /* group not root & */
3297        #ifdef CONFIGURE_GROUP
3298        && statbuf.st_gid != config_gid           /* group not the special one */
3299        #endif
3300        && (statbuf.st_mode & 020) != 0) ||       /* group writeable  */
3301                                                  /* or */
3302       ((statbuf.st_mode & 2) != 0))              /* world writeable  */
3303
3304     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3305       "wrong owner, group, or mode", big_buffer);
3306   }
3307
3308 /* Process the main configuration settings. They all begin with a lower case
3309 letter. If we see something starting with an upper case letter, it is taken as
3310 a macro definition. */
3311
3312 while ((s = get_config_line()))
3313   {
3314   if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3315     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3316       "found unexpected BOM (Byte Order Mark)");
3317
3318   if (isupper(s[0]))
3319     { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3320
3321   else if (Ustrncmp(s, "domainlist", 10) == 0)
3322     read_named_list(&domainlist_anchor, &domainlist_count,
3323       MAX_NAMED_LIST, s+10, US"domain list");
3324
3325   else if (Ustrncmp(s, "hostlist", 8) == 0)
3326     read_named_list(&hostlist_anchor, &hostlist_count,
3327       MAX_NAMED_LIST, s+8, US"host list");
3328
3329   else if (Ustrncmp(s, US"addresslist", 11) == 0)
3330     read_named_list(&addresslist_anchor, &addresslist_count,
3331       MAX_NAMED_LIST, s+11, US"address list");
3332
3333   else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3334     read_named_list(&localpartlist_anchor, &localpartlist_count,
3335       MAX_NAMED_LIST, s+13, US"local part list");
3336
3337   else
3338     (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3339       NULL, US"main option \"%s\" unknown");
3340   }
3341
3342
3343 /* If local_sender_retain is set, local_from_check must be unset. */
3344
3345 if (local_sender_retain && local_from_check)
3346   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3347     "local_sender_retain are set; this combination is not allowed");
3348
3349 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3350 wanted. */
3351
3352 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3353
3354 /* The max retry interval must not be greater than 24 hours. */
3355
3356 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3357
3358 /* remote_max_parallel must be > 0 */
3359
3360 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3361
3362 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3363 start of a new SMTP message. */
3364
3365 freeze_tell_config = freeze_tell;
3366
3367 /* The primary host name may be required for expansion of spool_directory
3368 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3369 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3370 canonize it. Some people like upper case letters in their host names, so we
3371 don't force the case. */
3372
3373 if (primary_hostname == NULL)
3374   {
3375   const uschar *hostname;
3376   struct utsname uts;
3377   if (uname(&uts) < 0)
3378     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3379   hostname = US uts.nodename;
3380
3381   if (Ustrchr(hostname, '.') == NULL)
3382     {
3383     int af = AF_INET;
3384     struct hostent *hostdata;
3385
3386     #if HAVE_IPV6
3387     if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3388          match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3389             MCL_DOMAIN, TRUE, NULL) != OK))
3390       af = AF_INET6;
3391     #else
3392     af = AF_INET;
3393     #endif
3394
3395     for (;;)
3396       {
3397       #if HAVE_IPV6
3398         #if HAVE_GETIPNODEBYNAME
3399         int error_num;
3400         hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3401         #else
3402         hostdata = gethostbyname2(CS hostname, af);
3403         #endif
3404       #else
3405       hostdata = gethostbyname(CS hostname);
3406       #endif
3407
3408       if (hostdata != NULL)
3409         {
3410         hostname = US hostdata->h_name;
3411         break;
3412         }
3413
3414       if (af == AF_INET) break;
3415       af = AF_INET;
3416       }
3417     }
3418
3419   primary_hostname = string_copy(hostname);
3420   }
3421
3422 /* Set up default value for smtp_active_hostname */
3423
3424 smtp_active_hostname = primary_hostname;
3425
3426 /* If spool_directory wasn't set in the build-time configuration, it must have
3427 got set above. Of course, writing to the log may not work if log_file_path is
3428 not set, but it will at least get to syslog or somewhere, with any luck. */
3429
3430 if (*spool_directory == 0)
3431   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3432     "proceed");
3433
3434 /* Expand the spool directory name; it may, for example, contain the primary
3435 host name. Same comment about failure. */
3436
3437 s = expand_string(spool_directory);
3438 if (s == NULL)
3439   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3440     "\"%s\": %s", spool_directory, expand_string_message);
3441 spool_directory = s;
3442
3443 /* Expand log_file_path, which must contain "%s" in any component that isn't
3444 the null string or "syslog". It is also allowed to contain one instance of %D
3445 or %M. However, it must NOT contain % followed by anything else. */
3446
3447 if (*log_file_path != 0)
3448   {
3449   const uschar *ss, *sss;
3450   int sep = ':';                       /* Fixed for log file path */
3451   s = expand_string(log_file_path);
3452   if (s == NULL)
3453     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3454       "\"%s\": %s", log_file_path, expand_string_message);
3455
3456   ss = s;
3457   while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3458     {
3459     uschar *t;
3460     if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3461     t = Ustrstr(sss, "%s");
3462     if (t == NULL)
3463       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3464         "contain \"%%s\"", sss);
3465     *t = 'X';
3466     t = Ustrchr(sss, '%');
3467     if (t != NULL)
3468       {
3469       if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3470         log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3471           "unexpected \"%%\" character", s);
3472       }
3473     }
3474
3475   log_file_path = s;
3476   }
3477
3478 /* Interpret syslog_facility into an integer argument for 'ident' param to
3479 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3480 leading "log_". */
3481
3482 if (syslog_facility_str)
3483   {
3484   int i;
3485   uschar *s = syslog_facility_str;
3486
3487   if ((Ustrlen(syslog_facility_str) >= 4) &&
3488         (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3489     s += 4;
3490
3491   for (i = 0; i < syslog_list_size; i++)
3492     if (strcmpic(s, syslog_list[i].name) == 0)
3493       {
3494       syslog_facility = syslog_list[i].value;
3495       break;
3496       }
3497
3498   if (i >= syslog_list_size)
3499     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3500       "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3501   }
3502
3503 /* Expand pid_file_path */
3504
3505 if (*pid_file_path != 0)
3506   {
3507   if (!(s = expand_string(pid_file_path)))
3508     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3509       "\"%s\": %s", pid_file_path, expand_string_message);
3510   pid_file_path = s;
3511   }
3512
3513 /* Set default value of process_log_path */
3514
3515 if (!process_log_path || *process_log_path =='\0')
3516   process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3517
3518 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3519 message. */
3520
3521 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3522
3523 /* Unpick the SMTP rate limiting options, if set */
3524
3525 if (smtp_ratelimit_mail)
3526   unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3527     &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3528
3529 if (smtp_ratelimit_rcpt)
3530   unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3531     &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3532
3533 /* The qualify domains default to the primary host name */
3534
3535 if (!qualify_domain_sender)
3536   qualify_domain_sender = primary_hostname;
3537 if (!qualify_domain_recipient)
3538   qualify_domain_recipient = qualify_domain_sender;
3539
3540 /* Setting system_filter_user in the configuration sets the gid as well if a
3541 name is given, but a numerical value does not. */
3542
3543 if (system_filter_uid_set && !system_filter_gid_set)
3544   {
3545   struct passwd *pw = getpwuid(system_filter_uid);
3546   if (!pw)
3547     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3548       (long int)system_filter_uid);
3549   system_filter_gid = pw->pw_gid;
3550   system_filter_gid_set = TRUE;
3551   }
3552
3553 /* If the errors_reply_to field is set, check that it is syntactically valid
3554 and ensure it contains a domain. */
3555
3556 if (errors_reply_to)
3557   {
3558   uschar *errmess;
3559   int start, end, domain;
3560   uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3561     &start, &end, &domain, FALSE);
3562
3563   if (!recipient)
3564     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3565       "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3566
3567   if (domain == 0)
3568     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3569       "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3570   }
3571
3572 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3573 smtp_accept_max must also be set. */
3574
3575 if (smtp_accept_max == 0 &&
3576     (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3577   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3578     "smtp_accept_max must be set if smtp_accept_queue or "
3579     "smtp_accept_max_per_host is set");
3580
3581 /* Set up the host number if anything is specified. It is an expanded string
3582 so that it can be computed from the host name, for example. We do this last
3583 so as to ensure that everything else is set up before the expansion. */
3584
3585 if (host_number_string)
3586   {
3587   long int n;
3588   uschar *end;
3589   uschar *s = expand_string(host_number_string);
3590
3591   if (!s)
3592     log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3593         "failed to expand localhost_number \"%s\": %s",
3594         host_number_string, expand_string_message);
3595   n = Ustrtol(s, &end, 0);
3596   while (isspace(*end)) end++;
3597   if (*end != 0)
3598     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3599       "localhost_number value is not a number: %s", s);
3600   if (n > LOCALHOST_MAX)
3601     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3602       "localhost_number is greater than the maximum allowed value (%d)",
3603         LOCALHOST_MAX);
3604   host_number = n;
3605   }
3606
3607 #ifdef SUPPORT_TLS
3608 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3609
3610 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3611   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3612     "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3613     tls_verify_hosts ? "" : "try_");
3614
3615 /* This also checks that the library linkage is working and we can call
3616 routines in it, so call even if tls_require_ciphers is unset */
3617 if (!tls_dropprivs_validate_require_cipher(nowarn))
3618   exit(1);
3619
3620 /* Magic number: at time of writing, 1024 has been the long-standing value
3621 used by so many clients, and what Exim used to use always, that it makes
3622 sense to just min-clamp this max-clamp at that. */
3623 if (tls_dh_max_bits < 1024)
3624   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3625       "tls_dh_max_bits is too small, must be at least 1024 for interop");
3626
3627 /* If openssl_options is set, validate it */
3628 if (openssl_options)
3629   {
3630 # ifdef USE_GNUTLS
3631   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3632     "openssl_options is set but we're using GnuTLS");
3633 # else
3634   long dummy;
3635   if (!tls_openssl_options_parse(openssl_options, &dummy))
3636     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3637       "openssl_options parse error: %s", openssl_options);
3638 # endif
3639   }
3640 #endif  /*SUPPORT_TLS*/
3641
3642 if (!nowarn && !keep_environment && environ && *environ)
3643   log_write(0, LOG_MAIN,
3644       "Warning: purging the environment.\n"
3645       " Suggested action: use keep_environment.");
3646 }
3647
3648
3649
3650 /*************************************************
3651 *          Initialize one driver                 *
3652 *************************************************/
3653
3654 /* This is called once the driver's generic options, if any, have been read.
3655 We can now find the driver, set up defaults for the private options, and
3656 unset any "set" bits in the private options table (which might have been
3657 set by another incarnation of the same driver).
3658
3659 Arguments:
3660   d                   pointer to driver instance block, with generic
3661                         options filled in
3662   drivers_available   vector of available drivers
3663   size_of_info        size of each block in drivers_available
3664   class               class of driver, for error message
3665
3666 Returns:              pointer to the driver info block
3667 */
3668
3669 static driver_info *
3670 init_driver(driver_instance *d, driver_info *drivers_available,
3671   int size_of_info, uschar *class)
3672 {
3673 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3674      dd = (driver_info *)((US dd) + size_of_info))
3675   if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3676     {
3677     int len = dd->options_len;
3678     d->info = dd;
3679     d->options_block = store_get(len);
3680     memcpy(d->options_block, dd->options_block, len);
3681     for (int i = 0; i < *(dd->options_count); i++)
3682       dd->options[i].type &= ~opt_set;
3683     return dd;
3684     }
3685
3686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3687   "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3688
3689 return NULL;   /* never obeyed */
3690 }
3691
3692
3693
3694
3695 /*************************************************
3696 *             Initialize driver list             *
3697 *************************************************/
3698
3699 /* This function is called for routers, transports, and authentication
3700 mechanisms. It reads the data from the current point in the configuration file
3701 up to the end of the section, and sets up a chain of instance blocks according
3702 to the file's contents. The file will already have been opened by a call to
3703 readconf_main, and must be left open for subsequent reading of further data.
3704
3705 Any errors cause a panic crash. Note that the blocks with names driver_info and
3706 driver_instance must map the first portions of all the _info and _instance
3707 blocks for this shared code to work.
3708
3709 Arguments:
3710   class                      "router", "transport", or "authenticator"
3711   anchor                     &routers, &transports, &auths
3712   drivers_available          available drivers
3713   size_of_info               size of each info block
3714   instance_default           points to default data for an instance
3715   instance_size              size of instance block
3716   driver_optionlist          generic option list
3717   driver_optionlist_count    count of generic option list
3718
3719 Returns:                     nothing
3720 */
3721
3722 void
3723 readconf_driver_init(
3724   uschar *class,
3725   driver_instance **anchor,
3726   driver_info *drivers_available,
3727   int size_of_info,
3728   void *instance_default,
3729   int  instance_size,
3730   optionlist *driver_optionlist,
3731   int  driver_optionlist_count)
3732 {
3733 driver_instance **p = anchor;
3734 driver_instance *d = NULL;
3735 uschar *buffer;
3736
3737 while ((buffer = get_config_line()) != NULL)
3738   {
3739   uschar name[64];
3740   uschar *s;
3741
3742   /* Read the first name on the line and test for the start of a new driver. A
3743   macro definition indicates the end of the previous driver. If this isn't the
3744   start of a new driver, the line will be re-read. */
3745
3746   s = readconf_readname(name, sizeof(name), buffer);
3747
3748   /* Handle macro definition, first finishing off the initialization of the
3749   previous driver, if any. */
3750
3751   if (isupper(*name) && *s == '=')
3752     {
3753     if (d)
3754       {
3755       if (!d->driver_name)
3756         log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3757           "no driver defined for %s \"%s\"", class, d->name);
3758       (d->info->init)(d);
3759       d = NULL;
3760       }
3761     if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3762     continue;
3763     }
3764
3765   /* If the line starts with a name terminated by a colon, we are at the
3766   start of the definition of a new driver. The rest of the line must be
3767   blank. */
3768
3769   if (*s++ == ':')
3770     {
3771     /* Finish off initializing the previous driver. */
3772
3773     if (d)
3774       {
3775       if (!d->driver_name)
3776         log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3777           "no driver defined for %s \"%s\"", class, d->name);
3778       (d->info->init)(d);
3779       }
3780
3781     /* Check that we haven't already got a driver of this name */
3782
3783     for (d = *anchor; d; d = d->next)
3784       if (Ustrcmp(name, d->name) == 0)
3785         log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3786           "there are two %ss called \"%s\"", class, name);
3787
3788     /* Set up a new driver instance data block on the chain, with
3789     its default values installed. */
3790
3791     d = store_get(instance_size);
3792     memcpy(d, instance_default, instance_size);
3793     *p = d;
3794     p = &d->next;
3795     d->name = string_copy(name);
3796
3797     /* Clear out the "set" bits in the generic options */
3798
3799     for (int i = 0; i < driver_optionlist_count; i++)
3800       driver_optionlist[i].type &= ~opt_set;
3801
3802     /* Check nothing more on this line, then do the next loop iteration. */
3803
3804     while (isspace(*s)) s++;
3805     if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3806     continue;
3807     }
3808
3809   /* Not the start of a new driver. Give an error if we have not set up a
3810   current driver yet. */
3811
3812   if (!d)
3813     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3814
3815   /* First look to see if this is a generic option; if it is "driver",
3816   initialize the driver. If is it not a generic option, we can look for a
3817   private option provided that the driver has been previously set up. */
3818
3819   if (readconf_handle_option(buffer, driver_optionlist,
3820         driver_optionlist_count, d, NULL))
3821     {
3822     if (!d->info && d->driver_name)
3823       init_driver(d, drivers_available, size_of_info, class);
3824     }
3825
3826   /* Handle private options - pass the generic block because some may
3827   live therein. A flag with each option indicates if it is in the public
3828   block. */
3829
3830   else if (d->info)
3831     readconf_handle_option(buffer, d->info->options,
3832       *(d->info->options_count), d, US"option \"%s\" unknown");
3833
3834   /* The option is not generic and the driver name has not yet been given. */
3835
3836   else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3837     "(\"driver\" must be specified before any private options)", name);
3838   }
3839
3840 /* Run the initialization function for the final driver. */
3841
3842 if (d)
3843   {
3844   if (!d->driver_name)
3845     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3846       "no driver defined for %s \"%s\"", class, d->name);
3847   (d->info->init)(d);
3848   }
3849 }
3850
3851
3852
3853 /*************************************************
3854 *            Check driver dependency             *
3855 *************************************************/
3856
3857 /* This function is passed a driver instance and a string. It checks whether
3858 any of the string options for the driver contains the given string as an
3859 expansion variable.
3860
3861 Arguments:
3862   d        points to a driver instance block
3863   s        the string to search for
3864
3865 Returns:   TRUE if a dependency is found
3866 */
3867
3868 BOOL
3869 readconf_depends(driver_instance *d, uschar *s)
3870 {
3871 int count = *(d->info->options_count);
3872 uschar *ss;
3873
3874 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3875   {
3876   void *options_block;
3877   uschar *value;
3878   int type = ol->type & opt_mask;
3879   if (type != opt_stringptr) continue;
3880   options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3881   value = *(uschar **)(US options_block + (long int)(ol->value));
3882   if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3883     {
3884     if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3885       isalnum(ss[Ustrlen(s)])) continue;
3886     DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3887       d->name, ol->name, s);
3888     return TRUE;
3889     }
3890   }
3891
3892 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3893 return FALSE;
3894 }
3895
3896
3897
3898
3899 /*************************************************
3900 *      Decode an error type for retries          *
3901 *************************************************/
3902
3903 /* This function is global because it is also called from the main
3904 program when testing retry information. It decodes strings such as "quota_7d"
3905 into numerical error codes.
3906
3907 Arguments:
3908   pp           points to start of text
3909   p            points past end of text
3910   basic_errno  points to an int to receive the main error number
3911   more_errno   points to an int to receive the secondary error data
3912
3913 Returns:       NULL if decoded correctly; else points to error text
3914 */
3915
3916 uschar *
3917 readconf_retry_error(const uschar *pp, const uschar *p,
3918   int *basic_errno, int *more_errno)
3919 {
3920 int len;
3921 const uschar *q = pp;
3922 while (q < p && *q != '_') q++;
3923 len = q - pp;
3924
3925 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3926   {
3927   *basic_errno = ERRNO_EXIMQUOTA;
3928   if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3929       return US"bad time value";
3930   }
3931
3932 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3933   {
3934   *basic_errno = ECONNREFUSED;
3935   if (q != p)
3936     {
3937     if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3938     else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3939     else return US"A or MX expected after \"refused\"";
3940     }
3941   }
3942
3943 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3944   {
3945   *basic_errno = ETIMEDOUT;
3946   if (q != p)
3947     {
3948     int i;
3949     int xlen = p - q - 1;
3950     const uschar *x = q + 1;
3951
3952     static uschar *extras[] =
3953       { US"A", US"MX", US"connect", US"connect_A",  US"connect_MX" };
3954     static int values[] =
3955       { 'A',   'M',    RTEF_CTOUT,  RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3956
3957     for (i = 0; i < nelem(extras); i++)
3958       if (strncmpic(x, extras[i], xlen) == 0)
3959         {
3960         *more_errno = values[i];
3961         break;
3962         }
3963
3964     if (i >= nelem(extras))
3965       if (strncmpic(x, US"DNS", xlen) == 0)
3966         log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3967           "available in retry rules (it has never worked) - treated as "
3968           "\"timeout\"");
3969       else
3970         return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3971     }
3972   }
3973
3974 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3975          strncmpic(pp, US"rcpt_4", 6) == 0 ||
3976          strncmpic(pp, US"data_4", 6) == 0)
3977   {
3978   BOOL bad = FALSE;
3979   int x = 255;                           /* means "any 4xx code" */
3980   if (p != pp + 8) bad = TRUE; else
3981     {
3982     int a = pp[6], b = pp[7];
3983     if (isdigit(a))
3984       {
3985       x = (a - '0') * 10;
3986       if (isdigit(b)) x += b - '0';
3987       else if (b == 'x') x += 100;
3988       else bad = TRUE;
3989       }
3990     else if (a != 'x' || b != 'x') bad = TRUE;
3991     }
3992
3993   if (bad)
3994     return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3995       "x is literal and d is any digit", pp);
3996
3997   *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3998                  *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3999   *more_errno = x << 8;
4000   }
4001
4002 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4003          strncmpic(q+1, US"failed", p-q-1) == 0)
4004   *basic_errno = ERRNO_AUTHFAIL;
4005
4006 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4007   *basic_errno = ERRNO_SMTPCLOSED;
4008
4009 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4010   *basic_errno = ERRNO_TLSREQUIRED;
4011
4012 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4013   *basic_errno = ERRNO_UNKNOWNHOST;
4014
4015 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4016   return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4017
4018 return NULL;
4019 }
4020
4021
4022
4023
4024 /*************************************************
4025 *                Read retry information          *
4026 *************************************************/
4027
4028 /* Each line of retry information contains:
4029
4030 .  A domain name pattern or an address pattern;
4031
4032 .  An error name, possibly with additional data, or *;
4033
4034 .  An optional sequence of retry items, each consisting of an identifying
4035    letter, a cutoff time, and optional parameters.
4036
4037 All this is decoded and placed into a control block. */
4038
4039
4040 /* Subroutine to read an argument, preceded by a comma and terminated
4041 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4042 1 = fixed point number (returned *1000).
4043
4044 Arguments:
4045   paddr     pointer to pointer to current character; updated
4046   type      0 => read a time; 1 => read a fixed point number
4047
4048 Returns:    time in seconds or fixed point number * 1000
4049 */
4050
4051 static int
4052 retry_arg(const uschar **paddr, int type)
4053 {
4054 const uschar *p = *paddr;
4055 const uschar *pp;
4056
4057 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4058
4059 while (isspace(*p)) p++;
4060 pp = p;
4061 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4062
4063 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4064   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4065
4066 *paddr = p;
4067 switch (type)
4068   {
4069   case 0: return readconf_readtime(pp, *p, FALSE);
4070   case 1: return readconf_readfixed(pp, *p);
4071   }
4072 return 0;    /* Keep picky compilers happy */
4073 }
4074
4075 /* The function proper */
4076
4077 void
4078 readconf_retries(void)
4079 {
4080 retry_config **chain = &retries;
4081 retry_config *next;
4082 const uschar *p;
4083
4084 while ((p = get_config_line()))
4085   {
4086   retry_rule **rchain;
4087   const uschar *pp;
4088   uschar *error;
4089
4090   next = store_get(sizeof(retry_config));
4091   next->next = NULL;
4092   *chain = next;
4093   chain = &(next->next);
4094   next->basic_errno = next->more_errno = 0;
4095   next->senders = NULL;
4096   next->rules = NULL;
4097   rchain = &(next->rules);
4098
4099   next->pattern = string_dequote(&p);
4100   while (isspace(*p)) p++;
4101   pp = p;
4102   while (mac_isgraph(*p)) p++;
4103   if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4104     "missing error type in retry rule");
4105
4106   /* Test error names for things we understand. */
4107
4108   if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4109        &next->more_errno)))
4110     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4111
4112   /* There may be an optional address list of senders to be used as another
4113   constraint on the rule. This was added later, so the syntax is a bit of a
4114   fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4115   an address list. */
4116
4117   while (isspace(*p)) p++;
4118   if (Ustrncmp(p, "senders", 7) == 0)
4119     {
4120     p += 7;
4121     while (isspace(*p)) p++;
4122     if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4123       "\"=\" expected after \"senders\" in retry rule");
4124     while (isspace(*p)) p++;
4125     next->senders = string_dequote(&p);
4126     }
4127
4128   /* Now the retry rules. Keep the maximum timeout encountered. */
4129
4130   while (isspace(*p)) p++;
4131
4132   while (*p != 0)
4133     {
4134     retry_rule *rule = store_get(sizeof(retry_rule));
4135     *rchain = rule;
4136     rchain = &(rule->next);
4137     rule->next = NULL;
4138     rule->rule = toupper(*p++);
4139     rule->timeout = retry_arg(&p, 0);
4140     if (rule->timeout > retry_maximum_timeout)
4141       retry_maximum_timeout = rule->timeout;
4142
4143     switch (rule->rule)
4144       {
4145       case 'F':   /* Fixed interval */
4146         rule->p1 = retry_arg(&p, 0);
4147         break;
4148
4149       case 'G':   /* Geometrically increasing intervals */
4150       case 'H':   /* Ditto, but with randomness */
4151         rule->p1 = retry_arg(&p, 0);
4152         rule->p2 = retry_arg(&p, 1);
4153         break;
4154
4155       default:
4156         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4157         break;
4158       }
4159
4160     if (rule->timeout <= 0 || rule->p1 <= 0 ||
4161           (rule->rule != 'F' && rule->p2 < 1000))
4162       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4163         "bad parameters for retry rule");
4164
4165     while (isspace(*p)) p++;
4166     if (*p == ';')
4167       {
4168       p++;
4169       while (isspace(*p)) p++;
4170       }
4171     else if (*p != 0)
4172       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4173     }
4174   }
4175 }
4176
4177
4178
4179 /*************************************************
4180 *         Initialize authenticators              *
4181 *************************************************/
4182
4183 /* Read the authenticators section of the configuration file.
4184
4185 Arguments:   none
4186 Returns:     nothing
4187 */
4188
4189 static void
4190 auths_init(void)
4191 {
4192 #ifdef EXPERIMENTAL_PIPE_CONNECT
4193 int nauths = 0;
4194 #endif
4195
4196 readconf_driver_init(US"authenticator",
4197   (driver_instance **)(&auths),      /* chain anchor */
4198   (driver_info *)auths_available,    /* available drivers */
4199   sizeof(auth_info),                 /* size of info block */
4200   &auth_defaults,                    /* default values for generic options */
4201   sizeof(auth_instance),             /* size of instance block */
4202   optionlist_auths,                  /* generic options */
4203   optionlist_auths_size);
4204
4205 for (auth_instance * au = auths; au; au = au->next)
4206   {
4207   if (!au->public_name)
4208     log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4209       "the %s authenticator", au->name);
4210
4211   for (auth_instance * bu = au->next; bu; bu = bu->next)
4212     if (strcmpic(au->public_name, bu->public_name) == 0)
4213       if ((au->client && bu->client) || (au->server && bu->server))
4214         log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4215           "(%s and %s) have the same public name (%s)",
4216           au->client ? US"client" : US"server", au->name, bu->name,
4217           au->public_name);
4218 #ifdef EXPERIMENTAL_PIPE_CONNECT
4219   nauths++;
4220 #endif
4221   }
4222 #ifdef EXPERIMENTAL_PIPE_CONNECT
4223 f.smtp_in_early_pipe_no_auth = nauths > 16;
4224 #endif
4225 }
4226
4227
4228
4229
4230 /*************************************************
4231 *             Read ACL information               *
4232 *************************************************/
4233
4234 /* If this run of Exim is not doing something that involves receiving a
4235 message, we can just skip over the ACL information. No need to parse it.
4236
4237 First, we have a function for acl_read() to call back to get the next line. We
4238 need to remember the line we passed, because at the end it will contain the
4239 name of the next ACL. */
4240
4241 static uschar *acl_line;
4242
4243 static uschar *
4244 acl_callback(void)
4245 {
4246 acl_line = get_config_line();
4247 return acl_line;
4248 }
4249
4250
4251 /* Now the main function:
4252
4253 Arguments:    none
4254 Returns:      nothing
4255 */
4256
4257 static void
4258 readconf_acl(void)
4259 {
4260 uschar *p;
4261
4262 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4263 between ACLs. */
4264
4265 acl_line = get_config_line();
4266
4267 while(acl_line)
4268   {
4269   uschar name[64];
4270   tree_node *node;
4271   uschar *error;
4272
4273   p = readconf_readname(name, sizeof(name), acl_line);
4274   if (isupper(*name) && *p == '=')
4275     {
4276     if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4277     acl_line = get_config_line();
4278     continue;
4279     }
4280
4281   if (*p != ':' || name[0] == 0)
4282     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4283
4284   node = store_get(sizeof(tree_node) + Ustrlen(name));
4285   Ustrcpy(node->name, name);
4286   if (!tree_insertnode(&acl_anchor, node))
4287     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4288       "there are two ACLs called \"%s\"", name);
4289
4290   node->data.ptr = acl_read(acl_callback, &error);
4291
4292   if (node->data.ptr == NULL && error != NULL)
4293     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4294   }
4295 }
4296
4297
4298
4299 /*************************************************
4300 *     Read configuration for local_scan()        *
4301 *************************************************/
4302
4303 /* This function is called after "begin local_scan" is encountered in the
4304 configuration file. If the local_scan() function allows for configuration
4305 options, we can process them. Otherwise, we expire in a panic.
4306
4307 Arguments:  none
4308 Returns:    nothing
4309 */
4310
4311 static void
4312 local_scan_init(void)
4313 {
4314 #ifndef LOCAL_SCAN_HAS_OPTIONS
4315 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4316   "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4317 #else
4318
4319 uschar *p;
4320 while ((p = get_config_line()))
4321   {
4322   (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4323     NULL, US"local_scan option \"%s\" unknown");
4324   }
4325 #endif
4326 }
4327
4328
4329
4330 /*************************************************
4331 *     Read rest of configuration (after main)    *
4332 *************************************************/
4333
4334 /* This function reads the rest of the runtime configuration, after the main
4335 configuration. It is called only when actually needed. Each subsequent section
4336 of the configuration starts with a line of the form
4337
4338   begin name
4339
4340 where the name is "routers", "transports", etc. A section is terminated by
4341 hitting the next "begin" line, and the next name is left in next_section.
4342 Because it may confuse people as to whether the names are singular or plural,
4343 we add "s" if it's missing. There is always enough room in next_section for
4344 this. This function is basically just a switch.
4345
4346 Arguments:   none
4347 Returns:     nothing
4348 */
4349
4350 static uschar *section_list[] = {
4351   US"acls",
4352   US"authenticators",
4353   US"local_scans",
4354   US"retrys",
4355   US"rewrites",
4356   US"routers",
4357   US"transports"};
4358
4359 void
4360 readconf_rest(void)
4361 {
4362 int had = 0;
4363
4364 while(next_section[0] != 0)
4365   {
4366   int bit;
4367   int first = 0;
4368   int last = nelem(section_list);
4369   int mid = last/2;
4370   int n = Ustrlen(next_section);
4371
4372   if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4373
4374   for (;;)
4375     {
4376     int c = strcmpic(next_section, section_list[mid]);
4377     if (c == 0) break;
4378     if (c > 0) first = mid + 1; else last = mid;
4379     if (first >= last)
4380       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4381         "\"%.*s\" is not a known configuration section name", n, next_section);
4382     mid = (last + first)/2;
4383     }
4384
4385   bit = 1 << mid;
4386   if (((had ^= bit) & bit) == 0)
4387     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4388       "\"%.*s\" section is repeated in the configuration file", n,
4389         next_section);
4390
4391   switch(mid)
4392     {
4393     case 0: readconf_acl(); break;
4394     case 1: auths_init(); break;
4395     case 2: local_scan_init(); break;
4396     case 3: readconf_retries(); break;
4397     case 4: readconf_rewrites(); break;
4398     case 5: route_init(); break;
4399     case 6: transport_init(); break;
4400     }
4401   }
4402
4403 (void)fclose(config_file);
4404 }
4405
4406 /* Init the storage for the pre-parsed config lines */
4407 void
4408 readconf_save_config(const uschar *s)
4409 {
4410 save_config_line(string_sprintf("# Exim Configuration (%s)",
4411   f.running_in_test_harness ? US"X" : s));
4412 }
4413
4414 static void
4415 save_config_position(const uschar *file, int line)
4416 {
4417 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4418 }
4419
4420 /* Append a pre-parsed logical line to the config lines store,
4421 this operates on a global (static) list that holds all the pre-parsed
4422 config lines, we do no further processing here, output formatting and
4423 honouring of <hide> or macros will be done during output */
4424
4425 static void
4426 save_config_line(const uschar* line)
4427 {
4428 static config_line_item *current;
4429 config_line_item *next;
4430
4431 next = (config_line_item*) store_get(sizeof(config_line_item));
4432 next->line = string_copy(line);
4433 next->next = NULL;
4434
4435 if (!config_lines) config_lines = next;
4436 else current->next = next;
4437
4438 current = next;
4439 }
4440
4441 /* List the parsed config lines, care about nice formatting and
4442 hide the <hide> values unless we're the admin user */
4443 void
4444 print_config(BOOL admin, BOOL terse)
4445 {
4446 const int TS = terse ? 0 : 2;
4447 int indent = 0;
4448
4449 for (config_line_item * i = config_lines; i; i = i->next)
4450   {
4451   uschar *current;
4452   uschar *p;
4453
4454   /* skip over to the first non-space */
4455   for (current = i->line; *current && isspace(*current); ++current)
4456     ;
4457
4458   if (*current == '\0')
4459     continue;
4460
4461   /* Collapse runs of spaces. We stop this if we encounter one of the
4462    * following characters: "'$, as this may indicate careful formatting */
4463   for (p = current; *p; ++p)
4464     {
4465     uschar *next;
4466     if (!isspace(*p)) continue;
4467     if (*p != ' ') *p = ' ';
4468
4469     for (next = p; isspace(*next); ++next)
4470       ;
4471
4472     if (next - p > 1)
4473       memmove(p+1, next, Ustrlen(next)+1);
4474
4475     if (*next == '"' || *next == '\'' || *next == '$')
4476       break;
4477     }
4478
4479   /* # lines */
4480   if (current[0] == '#')
4481     puts(CCS current);
4482
4483   /* begin lines are left aligned */
4484   else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4485     {
4486     if (!terse) puts("");
4487     puts(CCS current);
4488     indent = TS;
4489     }
4490
4491   /* router/acl/transport block names */
4492   else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4493     {
4494     if (!terse) puts("");
4495     printf("%*s%s\n", TS, "", current);
4496     indent = 2 * TS;
4497     }
4498
4499   /* hidden lines (all MACROS or lines prefixed with "hide") */
4500   else if (  !admin
4501           && (  isupper(*current)
4502              || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4503              )
4504           )
4505     {
4506     if ((p = Ustrchr(current, '=')))
4507       {
4508       *p = '\0';
4509       printf("%*s%s= %s\n", indent, "", current, hidden);
4510       }
4511     /* e.g.: hide split_spool_directory */
4512     else
4513       printf("%*s\n", indent, hidden);
4514     }
4515
4516   else
4517     /* rest is public */
4518     printf("%*s%s\n", indent, "", current);
4519   }
4520 }
4521
4522 #endif  /*!MACRO_PREDEF*/
4523 /* vi: aw ai sw=2
4524 */
4525 /* End of readconf.c */