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 static uschar * syslog_facility_str;
  19 static void fn_smtp_receive_timeout(const uschar *, const uschar *);
  20
  21 /*************************************************
  22 *           Main configuration options           *
  23 *************************************************/
  24
  25 /* The list of options that can be set in the main configuration file. This
  26 must be in alphabetic order because it is searched by binary chop. */
  27
  28 static optionlist optionlist_config[] = {
  29   { "*set_exim_group",          opt_bool|opt_hidden, &exim_gid_set },
  30   { "*set_exim_user",           opt_bool|opt_hidden, &exim_uid_set },
  31   { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
  32   { "*set_system_filter_user",  opt_bool|opt_hidden, &system_filter_uid_set },
  33   { "accept_8bitmime",          opt_bool,        &accept_8bitmime },
  34   { "acl_not_smtp",             opt_stringptr,   &acl_not_smtp },
  35 #ifdef WITH_CONTENT_SCAN
  36   { "acl_not_smtp_mime",        opt_stringptr,   &acl_not_smtp_mime },
  37 #endif
  38   { "acl_not_smtp_start",       opt_stringptr,   &acl_not_smtp_start },
  39   { "acl_smtp_auth",            opt_stringptr,   &acl_smtp_auth },
  40   { "acl_smtp_connect",         opt_stringptr,   &acl_smtp_connect },
  41   { "acl_smtp_data",            opt_stringptr,   &acl_smtp_data },
  42 #ifndef DISABLE_PRDR
  43   { "acl_smtp_data_prdr",       opt_stringptr,   &acl_smtp_data_prdr },
  44 #endif
  45 #ifndef DISABLE_DKIM
  46   { "acl_smtp_dkim",            opt_stringptr,   &acl_smtp_dkim },
  47 #endif
  48   { "acl_smtp_etrn",            opt_stringptr,   &acl_smtp_etrn },
  49   { "acl_smtp_expn",            opt_stringptr,   &acl_smtp_expn },
  50   { "acl_smtp_helo",            opt_stringptr,   &acl_smtp_helo },
  51   { "acl_smtp_mail",            opt_stringptr,   &acl_smtp_mail },
  52   { "acl_smtp_mailauth",        opt_stringptr,   &acl_smtp_mailauth },
  53 #ifdef WITH_CONTENT_SCAN
  54   { "acl_smtp_mime",            opt_stringptr,   &acl_smtp_mime },
  55 #endif
  56   { "acl_smtp_notquit",         opt_stringptr,   &acl_smtp_notquit },
  57   { "acl_smtp_predata",         opt_stringptr,   &acl_smtp_predata },
  58   { "acl_smtp_quit",            opt_stringptr,   &acl_smtp_quit },
  59   { "acl_smtp_rcpt",            opt_stringptr,   &acl_smtp_rcpt },
  60 #ifdef SUPPORT_TLS
  61   { "acl_smtp_starttls",        opt_stringptr,   &acl_smtp_starttls },
  62 #endif
  63   { "acl_smtp_vrfy",            opt_stringptr,   &acl_smtp_vrfy },
  64   { "add_environment",          opt_stringptr,   &add_environment },
  65   { "admin_groups",             opt_gidlist,     &admin_groups },
  66   { "allow_domain_literals",    opt_bool,        &allow_domain_literals },
  67   { "allow_mx_to_ip",           opt_bool,        &allow_mx_to_ip },
  68   { "allow_utf8_domains",       opt_bool,        &allow_utf8_domains },
  69   { "auth_advertise_hosts",     opt_stringptr,   &auth_advertise_hosts },
  70   { "auto_thaw",                opt_time,        &auto_thaw },
  71 #ifdef WITH_CONTENT_SCAN
  72   { "av_scanner",               opt_stringptr,   &av_scanner },
  73 #endif
  74   { "bi_command",               opt_stringptr,   &bi_command },
  75 #ifdef EXPERIMENTAL_BRIGHTMAIL
  76   { "bmi_config_file",          opt_stringptr,   &bmi_config_file },
  77 #endif
  78   { "bounce_message_file",      opt_stringptr,   &bounce_message_file },
  79   { "bounce_message_text",      opt_stringptr,   &bounce_message_text },
  80   { "bounce_return_body",       opt_bool,        &bounce_return_body },
  81   { "bounce_return_linesize_limit", opt_mkint,   &bounce_return_linesize_limit },
  82   { "bounce_return_message",    opt_bool,        &bounce_return_message },
  83   { "bounce_return_size_limit", opt_mkint,       &bounce_return_size_limit },
  84   { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
  85   { "callout_domain_negative_expire", opt_time,  &callout_cache_domain_negative_expire },
  86   { "callout_domain_positive_expire", opt_time,  &callout_cache_domain_positive_expire },
  87   { "callout_negative_expire",  opt_time,        &callout_cache_negative_expire },
  88   { "callout_positive_expire",  opt_time,        &callout_cache_positive_expire },
  89   { "callout_random_local_part",opt_stringptr,   &callout_random_local_part },
  90   { "check_log_inodes",         opt_int,         &check_log_inodes },
  91   { "check_log_space",          opt_Kint,        &check_log_space },
  92   { "check_rfc2047_length",     opt_bool,        &check_rfc2047_length },
  93   { "check_spool_inodes",       opt_int,         &check_spool_inodes },
  94   { "check_spool_space",        opt_Kint,        &check_spool_space },
  95   { "chunking_advertise_hosts", opt_stringptr,   &chunking_advertise_hosts },
  96   { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
  97   { "daemon_smtp_port",         opt_stringptr|opt_hidden, &daemon_smtp_port },
  98   { "daemon_smtp_ports",        opt_stringptr,   &daemon_smtp_port },
  99   { "daemon_startup_retries",   opt_int,         &daemon_startup_retries },
 100   { "daemon_startup_sleep",     opt_time,        &daemon_startup_sleep },
 101 #ifdef EXPERIMENTAL_DCC
 102   { "dcc_direct_add_header",    opt_bool,        &dcc_direct_add_header },
 103   { "dccifd_address",           opt_stringptr,   &dccifd_address },
 104   { "dccifd_options",           opt_stringptr,   &dccifd_options },
 105 #endif
 106   { "debug_store",              opt_bool,        &debug_store },
 107   { "delay_warning",            opt_timelist,    &delay_warning },
 108   { "delay_warning_condition",  opt_stringptr,   &delay_warning_condition },
 109   { "deliver_drop_privilege",   opt_bool,        &deliver_drop_privilege },
 110   { "deliver_queue_load_max",   opt_fixed,       &deliver_queue_load_max },
 111   { "delivery_date_remove",     opt_bool,        &delivery_date_remove },
 112 #ifdef ENABLE_DISABLE_FSYNC
 113   { "disable_fsync",            opt_bool,        &disable_fsync },
 114 #endif
 115   { "disable_ipv6",             opt_bool,        &disable_ipv6 },
 116 #ifndef DISABLE_DKIM
 117   { "dkim_verify_signers",      opt_stringptr,   &dkim_verify_signers },
 118 #endif
 119 #ifdef EXPERIMENTAL_DMARC
 120   { "dmarc_forensic_sender",    opt_stringptr,   &dmarc_forensic_sender },
 121   { "dmarc_history_file",       opt_stringptr,   &dmarc_history_file },
 122   { "dmarc_tld_file",           opt_stringptr,   &dmarc_tld_file },
 123 #endif
 124   { "dns_again_means_nonexist", opt_stringptr,   &dns_again_means_nonexist },
 125   { "dns_check_names_pattern",  opt_stringptr,   &check_dns_names_pattern },
 126   { "dns_cname_loops",          opt_int,         &dns_cname_loops },
 127   { "dns_csa_search_limit",     opt_int,         &dns_csa_search_limit },
 128   { "dns_csa_use_reverse",      opt_bool,        &dns_csa_use_reverse },
 129   { "dns_dnssec_ok",            opt_int,         &dns_dnssec_ok },
 130   { "dns_ipv4_lookup",          opt_stringptr,   &dns_ipv4_lookup },
 131   { "dns_retrans",              opt_time,        &dns_retrans },
 132   { "dns_retry",                opt_int,         &dns_retry },
 133   { "dns_trust_aa",             opt_stringptr,   &dns_trust_aa },
 134   { "dns_use_edns0",            opt_int,         &dns_use_edns0 },
 135  /* This option is now a no-op, retained for compatibility */
 136   { "drop_cr",                  opt_bool,        &drop_cr },
 137 /*********************************************************/
 138   { "dsn_advertise_hosts",      opt_stringptr,   &dsn_advertise_hosts },
 139   { "dsn_from",                 opt_stringptr,   &dsn_from },
 140   { "envelope_to_remove",       opt_bool,        &envelope_to_remove },
 141   { "errors_copy",              opt_stringptr,   &errors_copy },
 142   { "errors_reply_to",          opt_stringptr,   &errors_reply_to },
 143 #ifndef DISABLE_EVENT
 144   { "event_action",             opt_stringptr,   &event_action },
 145 #endif
 146   { "exim_group",               opt_gid,         &exim_gid },
 147   { "exim_path",                opt_stringptr,   &exim_path },
 148   { "exim_user",                opt_uid,         &exim_uid },
 149   { "extra_local_interfaces",   opt_stringptr,   &extra_local_interfaces },
 150   { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
 151   { "finduser_retries",         opt_int,         &finduser_retries },
 152   { "freeze_tell",              opt_stringptr,   &freeze_tell },
 153   { "gecos_name",               opt_stringptr,   &gecos_name },
 154   { "gecos_pattern",            opt_stringptr,   &gecos_pattern },
 155 #ifdef SUPPORT_TLS
 156   { "gnutls_allow_auto_pkcs11", opt_bool,        &gnutls_allow_auto_pkcs11 },
 157   { "gnutls_compat_mode",       opt_bool,        &gnutls_compat_mode },
 158 #endif
 159   { "header_line_maxsize",      opt_int,         &header_line_maxsize },
 160   { "header_maxsize",           opt_int,         &header_maxsize },
 161   { "headers_charset",          opt_stringptr,   &headers_charset },
 162   { "helo_accept_junk_hosts",   opt_stringptr,   &helo_accept_junk_hosts },
 163   { "helo_allow_chars",         opt_stringptr,   &helo_allow_chars },
 164   { "helo_lookup_domains",      opt_stringptr,   &helo_lookup_domains },
 165   { "helo_try_verify_hosts",    opt_stringptr,   &helo_try_verify_hosts },
 166   { "helo_verify_hosts",        opt_stringptr,   &helo_verify_hosts },
 167   { "hold_domains",             opt_stringptr,   &hold_domains },
 168   { "host_lookup",              opt_stringptr,   &host_lookup },
 169   { "host_lookup_order",        opt_stringptr,   &host_lookup_order },
 170   { "host_reject_connection",   opt_stringptr,   &host_reject_connection },
 171   { "hosts_connection_nolog",   opt_stringptr,   &hosts_connection_nolog },
 172 #ifdef SUPPORT_PROXY
 173   { "hosts_proxy",              opt_stringptr,   &hosts_proxy },
 174 #endif
 175   { "hosts_treat_as_local",     opt_stringptr,   &hosts_treat_as_local },
 176 #ifdef LOOKUP_IBASE
 177   { "ibase_servers",            opt_stringptr,   &ibase_servers },
 178 #endif
 179   { "ignore_bounce_errors_after", opt_time,      &ignore_bounce_errors_after },
 180   { "ignore_fromline_hosts",    opt_stringptr,   &ignore_fromline_hosts },
 181   { "ignore_fromline_local",    opt_bool,        &ignore_fromline_local },
 182   { "keep_environment",         opt_stringptr,   &keep_environment },
 183   { "keep_malformed",           opt_time,        &keep_malformed },
 184 #ifdef LOOKUP_LDAP
 185   { "ldap_ca_cert_dir",         opt_stringptr,   &eldap_ca_cert_dir },
 186   { "ldap_ca_cert_file",        opt_stringptr,   &eldap_ca_cert_file },
 187   { "ldap_cert_file",           opt_stringptr,   &eldap_cert_file },
 188   { "ldap_cert_key",            opt_stringptr,   &eldap_cert_key },
 189   { "ldap_cipher_suite",        opt_stringptr,   &eldap_cipher_suite },
 190   { "ldap_default_servers",     opt_stringptr,   &eldap_default_servers },
 191   { "ldap_require_cert",        opt_stringptr,   &eldap_require_cert },
 192   { "ldap_start_tls",           opt_bool,        &eldap_start_tls },
 193   { "ldap_version",             opt_int,         &eldap_version },
 194 #endif
 195   { "local_from_check",         opt_bool,        &local_from_check },
 196   { "local_from_prefix",        opt_stringptr,   &local_from_prefix },
 197   { "local_from_suffix",        opt_stringptr,   &local_from_suffix },
 198   { "local_interfaces",         opt_stringptr,   &local_interfaces },
 199 #ifdef HAVE_LOCAL_SCAN
 200   { "local_scan_timeout",       opt_time,        &local_scan_timeout },
 201 #endif
 202   { "local_sender_retain",      opt_bool,        &local_sender_retain },
 203   { "localhost_number",         opt_stringptr,   &host_number_string },
 204   { "log_file_path",            opt_stringptr,   &log_file_path },
 205   { "log_selector",             opt_stringptr,   &log_selector_string },
 206   { "log_timezone",             opt_bool,        &log_timezone },
 207   { "lookup_open_max",          opt_int,         &lookup_open_max },
 208   { "max_username_length",      opt_int,         &max_username_length },
 209   { "message_body_newlines",    opt_bool,        &message_body_newlines },
 210   { "message_body_visible",     opt_mkint,       &message_body_visible },
 211   { "message_id_header_domain", opt_stringptr,   &message_id_domain },
 212   { "message_id_header_text",   opt_stringptr,   &message_id_text },
 213   { "message_logs",             opt_bool,        &message_logs },
 214   { "message_size_limit",       opt_stringptr,   &message_size_limit },
 215 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
 216   { "move_frozen_messages",     opt_bool,        &move_frozen_messages },
 217 #endif
 218   { "mua_wrapper",              opt_bool,        &mua_wrapper },
 219 #ifdef LOOKUP_MYSQL
 220   { "mysql_servers",            opt_stringptr,   &mysql_servers },
 221 #endif
 222   { "never_users",              opt_uidlist,     &never_users },
 223 #ifdef SUPPORT_TLS
 224   { "openssl_options",          opt_stringptr,   &openssl_options },
 225 #endif
 226 #ifdef LOOKUP_ORACLE
 227   { "oracle_servers",           opt_stringptr,   &oracle_servers },
 228 #endif
 229   { "percent_hack_domains",     opt_stringptr,   &percent_hack_domains },
 230 #ifdef EXIM_PERL
 231   { "perl_at_start",            opt_bool,        &opt_perl_at_start },
 232   { "perl_startup",             opt_stringptr,   &opt_perl_startup },
 233   { "perl_taintmode",           opt_bool,        &opt_perl_taintmode },
 234 #endif
 235 #ifdef LOOKUP_PGSQL
 236   { "pgsql_servers",            opt_stringptr,   &pgsql_servers },
 237 #endif
 238   { "pid_file_path",            opt_stringptr,   &pid_file_path },
 239   { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
 240 #ifndef DISABLE_PRDR
 241   { "prdr_enable",              opt_bool,        &prdr_enable },
 242 #endif
 243   { "preserve_message_logs",    opt_bool,        &preserve_message_logs },
 244   { "primary_hostname",         opt_stringptr,   &primary_hostname },
 245   { "print_topbitchars",        opt_bool,        &print_topbitchars },
 246   { "process_log_path",         opt_stringptr,   &process_log_path },
 247   { "prod_requires_admin",      opt_bool,        &prod_requires_admin },
 248   { "qualify_domain",           opt_stringptr,   &qualify_domain_sender },
 249   { "qualify_recipient",        opt_stringptr,   &qualify_domain_recipient },
 250   { "queue_domains",            opt_stringptr,   &queue_domains },
 251   { "queue_list_requires_admin",opt_bool,        &queue_list_requires_admin },
 252   { "queue_only",               opt_bool,        &queue_only },
 253   { "queue_only_file",          opt_stringptr,   &queue_only_file },
 254   { "queue_only_load",          opt_fixed,       &queue_only_load },
 255   { "queue_only_load_latch",    opt_bool,        &queue_only_load_latch },
 256   { "queue_only_override",      opt_bool,        &queue_only_override },
 257   { "queue_run_in_order",       opt_bool,        &queue_run_in_order },
 258   { "queue_run_max",            opt_stringptr,   &queue_run_max },
 259   { "queue_smtp_domains",       opt_stringptr,   &queue_smtp_domains },
 260   { "receive_timeout",          opt_time,        &receive_timeout },
 261   { "received_header_text",     opt_stringptr,   &received_header_text },
 262   { "received_headers_max",     opt_int,         &received_headers_max },
 263   { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
 264   { "recipients_max",           opt_int,         &recipients_max },
 265   { "recipients_max_reject",    opt_bool,        &recipients_max_reject },
 266 #ifdef LOOKUP_REDIS
 267   { "redis_servers",            opt_stringptr,   &redis_servers },
 268 #endif
 269   { "remote_max_parallel",      opt_int,         &remote_max_parallel },
 270   { "remote_sort_domains",      opt_stringptr,   &remote_sort_domains },
 271   { "retry_data_expire",        opt_time,        &retry_data_expire },
 272   { "retry_interval_max",       opt_time,        &retry_interval_max },
 273   { "return_path_remove",       opt_bool,        &return_path_remove },
 274   { "return_size_limit",        opt_mkint|opt_hidden, &bounce_return_size_limit },
 275   { "rfc1413_hosts",            opt_stringptr,   &rfc1413_hosts },
 276   { "rfc1413_query_timeout",    opt_time,        &rfc1413_query_timeout },
 277   { "sender_unqualified_hosts", opt_stringptr,   &sender_unqualified_hosts },
 278   { "slow_lookup_log",          opt_int,         &slow_lookup_log },
 279   { "smtp_accept_keepalive",    opt_bool,        &smtp_accept_keepalive },
 280   { "smtp_accept_max",          opt_int,         &smtp_accept_max },
 281   { "smtp_accept_max_nonmail",  opt_int,         &smtp_accept_max_nonmail },
 282   { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
 283   { "smtp_accept_max_per_connection", opt_int,   &smtp_accept_max_per_connection },
 284   { "smtp_accept_max_per_host", opt_stringptr,   &smtp_accept_max_per_host },
 285   { "smtp_accept_queue",        opt_int,         &smtp_accept_queue },
 286   { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
 287   { "smtp_accept_reserve",      opt_int,         &smtp_accept_reserve },
 288   { "smtp_active_hostname",     opt_stringptr,   &raw_active_hostname },
 289   { "smtp_banner",              opt_stringptr,   &smtp_banner },
 290   { "smtp_check_spool_space",   opt_bool,        &smtp_check_spool_space },
 291   { "smtp_connect_backlog",     opt_int,         &smtp_connect_backlog },
 292   { "smtp_enforce_sync",        opt_bool,        &smtp_enforce_sync },
 293   { "smtp_etrn_command",        opt_stringptr,   &smtp_etrn_command },
 294   { "smtp_etrn_serialize",      opt_bool,        &smtp_etrn_serialize },
 295   { "smtp_load_reserve",        opt_fixed,       &smtp_load_reserve },
 296   { "smtp_max_synprot_errors",  opt_int,         &smtp_max_synprot_errors },
 297   { "smtp_max_unknown_commands",opt_int,         &smtp_max_unknown_commands },
 298   { "smtp_ratelimit_hosts",     opt_stringptr,   &smtp_ratelimit_hosts },
 299   { "smtp_ratelimit_mail",      opt_stringptr,   &smtp_ratelimit_mail },
 300   { "smtp_ratelimit_rcpt",      opt_stringptr,   &smtp_ratelimit_rcpt },
 301   { "smtp_receive_timeout",     opt_func,        &fn_smtp_receive_timeout },
 302   { "smtp_reserve_hosts",       opt_stringptr,   &smtp_reserve_hosts },
 303   { "smtp_return_error_details",opt_bool,        &smtp_return_error_details },
 304 #ifdef SUPPORT_I18N
 305   { "smtputf8_advertise_hosts", opt_stringptr,   &smtputf8_advertise_hosts },
 306 #endif
 307 #ifdef WITH_CONTENT_SCAN
 308   { "spamd_address",            opt_stringptr,   &spamd_address },
 309 #endif
 310 #ifdef SUPPORT_SPF
 311   { "spf_guess",                opt_stringptr,   &spf_guess },
 312 #endif
 313   { "split_spool_directory",    opt_bool,        &split_spool_directory },
 314   { "spool_directory",          opt_stringptr,   &spool_directory },
 315   { "spool_wireformat",         opt_bool,        &spool_wireformat },
 316 #ifdef LOOKUP_SQLITE
 317   { "sqlite_lock_timeout",      opt_int,         &sqlite_lock_timeout },
 318 #endif
 319 #ifdef EXPERIMENTAL_SRS
 320   { "srs_config",               opt_stringptr,   &srs_config },
 321   { "srs_hashlength",           opt_int,         &srs_hashlength },
 322   { "srs_hashmin",              opt_int,         &srs_hashmin },
 323   { "srs_maxage",               opt_int,         &srs_maxage },
 324   { "srs_secrets",              opt_stringptr,   &srs_secrets },
 325   { "srs_usehash",              opt_bool,        &srs_usehash },
 326   { "srs_usetimestamp",         opt_bool,        &srs_usetimestamp },
 327 #endif
 328   { "strict_acl_vars",          opt_bool,        &strict_acl_vars },
 329   { "strip_excess_angle_brackets", opt_bool,     &strip_excess_angle_brackets },
 330   { "strip_trailing_dot",       opt_bool,        &strip_trailing_dot },
 331   { "syslog_duplication",       opt_bool,        &syslog_duplication },
 332   { "syslog_facility",          opt_stringptr,   &syslog_facility_str },
 333   { "syslog_pid",               opt_bool,        &syslog_pid },
 334   { "syslog_processname",       opt_stringptr,   &syslog_processname },
 335   { "syslog_timestamp",         opt_bool,        &syslog_timestamp },
 336   { "system_filter",            opt_stringptr,   &system_filter },
 337   { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
 338   { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
 339   { "system_filter_group",      opt_gid,         &system_filter_gid },
 340   { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
 341   { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
 342   { "system_filter_user",       opt_uid,         &system_filter_uid },
 343   { "tcp_nodelay",              opt_bool,        &tcp_nodelay },
 344 #ifdef USE_TCP_WRAPPERS
 345   { "tcp_wrappers_daemon_name", opt_stringptr,   &tcp_wrappers_daemon_name },
 346 #endif
 347   { "timeout_frozen_after",     opt_time,        &timeout_frozen_after },
 348   { "timezone",                 opt_stringptr,   &timezone_string },
 349   { "tls_advertise_hosts",      opt_stringptr,   &tls_advertise_hosts },
 350 #ifdef SUPPORT_TLS
 351 # ifdef EXPERIMENTAL_REQUIRETLS
 352   { "tls_advertise_requiretls", opt_stringptr,   &tls_advertise_requiretls },
 353 # endif
 354   { "tls_certificate",          opt_stringptr,   &tls_certificate },
 355   { "tls_crl",                  opt_stringptr,   &tls_crl },
 356   { "tls_dh_max_bits",          opt_int,         &tls_dh_max_bits },
 357   { "tls_dhparam",              opt_stringptr,   &tls_dhparam },
 358   { "tls_eccurve",              opt_stringptr,   &tls_eccurve },
 359 # ifndef DISABLE_OCSP
 360   { "tls_ocsp_file",            opt_stringptr,   &tls_ocsp_file },
 361 # endif
 362   { "tls_on_connect_ports",     opt_stringptr,   &tls_in.on_connect_ports },
 363   { "tls_privatekey",           opt_stringptr,   &tls_privatekey },
 364   { "tls_remember_esmtp",       opt_bool,        &tls_remember_esmtp },
 365   { "tls_require_ciphers",      opt_stringptr,   &tls_require_ciphers },
 366   { "tls_try_verify_hosts",     opt_stringptr,   &tls_try_verify_hosts },
 367   { "tls_verify_certificates",  opt_stringptr,   &tls_verify_certificates },
 368   { "tls_verify_hosts",         opt_stringptr,   &tls_verify_hosts },
 369 #endif
 370   { "trusted_groups",           opt_gidlist,     &trusted_groups },
 371   { "trusted_users",            opt_uidlist,     &trusted_users },
 372   { "unknown_login",            opt_stringptr,   &unknown_login },
 373   { "unknown_username",         opt_stringptr,   &unknown_username },
 374   { "untrusted_set_sender",     opt_stringptr,   &untrusted_set_sender },
 375   { "uucp_from_pattern",        opt_stringptr,   &uucp_from_pattern },
 376   { "uucp_from_sender",         opt_stringptr,   &uucp_from_sender },
 377   { "warn_message_file",        opt_stringptr,   &warn_message_file },
 378   { "write_rejectlog",          opt_bool,        &write_rejectlog }
 379 };
 380
 381 #ifndef MACRO_PREDEF
 382 static int optionlist_config_size = nelem(optionlist_config);
 383 #endif
 384
 385
 386 #ifdef MACRO_PREDEF
 387
 388 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
 389
 390 void
 391 options_main(void)
 392 {
 393 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
 394 }
 395
 396 void
 397 options_auths(void)
 398 {
 399 struct auth_info * ai;
 400 uschar buf[64];
 401
 402 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
 403
 404 for (ai = auths_available; ai->driver_name[0]; ai++)
 405   {
 406   spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
 407   builtin_macro_create(buf);
 408   options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
 409   }
 410 }
 411
 412
 413 #else   /*!MACRO_PREDEF*/
 414
 415 extern char **environ;
 416
 417 static void save_config_line(const uschar* line);
 418 static void save_config_position(const uschar *file, int line);
 419 static void print_config(BOOL admin, BOOL terse);
 420
 421
 422 #define CSTATE_STACK_SIZE 10
 423
 424 const uschar *config_directory = NULL;
 425
 426
 427 /* Structure for chain (stack) of .included files */
 428
 429 typedef struct config_file_item {
 430   struct config_file_item *next;
 431   const uschar *filename;
 432   const uschar *directory;
 433   FILE *file;
 434   int lineno;
 435 } config_file_item;
 436
 437 /* Structure for chain of configuration lines (-bP config) */
 438
 439 typedef struct config_line_item {
 440   struct config_line_item *next;
 441   uschar *line;
 442 } config_line_item;
 443
 444 static config_line_item* config_lines;
 445
 446 /* Structure of table of conditional words and their state transitions */
 447
 448 typedef struct cond_item {
 449   uschar *name;
 450   int    namelen;
 451   int    action1;
 452   int    action2;
 453   int    pushpop;
 454 } cond_item;
 455
 456 /* Structure of table of syslog facility names and values */
 457
 458 typedef struct syslog_fac_item {
 459   uschar *name;
 460   int    value;
 461 } syslog_fac_item;
 462
 463 /* constants */
 464 static const char * const hidden = "<value not displayable>";
 465
 466 /* Static variables */
 467
 468 static config_file_item *config_file_stack = NULL;  /* For includes */
 469
 470 static uschar *syslog_facility_str  = NULL;
 471 static uschar next_section[24];
 472 static uschar time_buffer[24];
 473
 474 /* State variables for conditional loading (.ifdef / .else / .endif) */
 475
 476 static int cstate = 0;
 477 static int cstate_stack_ptr = -1;
 478 static int cstate_stack[CSTATE_STACK_SIZE];
 479
 480 /* Table of state transitions for handling conditional inclusions. There are
 481 four possible state transitions:
 482
 483   .ifdef true
 484   .ifdef false
 485   .elifdef true  (or .else)
 486   .elifdef false
 487
 488 .endif just causes the previous cstate to be popped off the stack */
 489
 490 static int next_cstate[3][4] =
 491   {
 492   /* State 0: reading from file, or reading until next .else or .endif */
 493   { 0, 1, 2, 2 },
 494   /* State 1: condition failed, skipping until next .else or .endif */
 495   { 2, 2, 0, 1 },
 496   /* State 2: skipping until .endif */
 497   { 2, 2, 2, 2 },
 498   };
 499
 500 /* Table of conditionals and the states to set. For each name, there are four
 501 values: the length of the name (to save computing it each time), the state to
 502 set if a macro was found in the line, the state to set if a macro was not found
 503 in the line, and a stack manipulation setting which is:
 504
 505   -1   pull state value off the stack
 506    0   don't alter the stack
 507   +1   push value onto stack, before setting new state
 508 */
 509
 510 static cond_item cond_list[] = {
 511   { US"ifdef",    5, 0, 1,  1 },
 512   { US"ifndef",   6, 1, 0,  1 },
 513   { US"elifdef",  7, 2, 3,  0 },
 514   { US"elifndef", 8, 3, 2,  0 },
 515   { US"else",     4, 2, 2,  0 },
 516   { US"endif",    5, 0, 0, -1 }
 517 };
 518
 519 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
 520
 521 /* Table of syslog facility names and their values */
 522
 523 static syslog_fac_item syslog_list[] = {
 524   { US"mail",   LOG_MAIL },
 525   { US"user",   LOG_USER },
 526   { US"news",   LOG_NEWS },
 527   { US"uucp",   LOG_UUCP },
 528   { US"local0", LOG_LOCAL0 },
 529   { US"local1", LOG_LOCAL1 },
 530   { US"local2", LOG_LOCAL2 },
 531   { US"local3", LOG_LOCAL3 },
 532   { US"local4", LOG_LOCAL4 },
 533   { US"local5", LOG_LOCAL5 },
 534   { US"local6", LOG_LOCAL6 },
 535   { US"local7", LOG_LOCAL7 },
 536   { US"daemon", LOG_DAEMON }
 537 };
 538
 539 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
 540
 541
 542
 543
 544 /*************************************************
 545 *         Find the name of an option             *
 546 *************************************************/
 547
 548 /* This function is to aid debugging. Various functions take arguments that are
 549 pointer variables in the options table or in option tables for various drivers.
 550 For debugging output, it is useful to be able to find the name of the option
 551 which is currently being processed. This function finds it, if it exists, by
 552 searching the table(s).
 553
 554 Arguments:   a value that is presumed to be in the table above
 555 Returns:     the option name, or an empty string
 556 */
 557
 558 uschar *
 559 readconf_find_option(void *p)
 560 {
 561 int i;
 562 router_instance *r;
 563 transport_instance *t;
 564
 565 for (i = 0; i < nelem(optionlist_config); i++)
 566   if (p == optionlist_config[i].value) return US optionlist_config[i].name;
 567
 568 for (r = routers; r; r = r->next)
 569   {
 570   router_info *ri = r->info;
 571   for (i = 0; i < *ri->options_count; i++)
 572     {
 573     if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
 574     if (p == CS (r->options_block) + (long int)(ri->options[i].value))
 575       return US ri->options[i].name;
 576     }
 577   }
 578
 579 for (t = transports; t; t = t->next)
 580   {
 581   transport_info *ti = t->info;
 582   for (i = 0; i < *ti->options_count; i++)
 583     {
 584     optionlist * op = &ti->options[i];
 585     if ((op->type & opt_mask) != opt_stringptr) continue;
 586     if (p == (  op->type & opt_public
 587              ? CS t
 588              : CS t->options_block
 589              )
 590              + (long int)op->value)
 591         return US op->name;
 592     }
 593   }
 594
 595 return US"";
 596 }
 597
 598
 599
 600
 601 /*************************************************
 602 *       Deal with an assignment to a macro       *
 603 *************************************************/
 604
 605 /* We have a new definition; append to the list.
 606
 607 Args:
 608  name   Name of the macro; will be copied
 609  val    Expansion result for the macro; will be copied
 610 */
 611
 612 macro_item *
 613 macro_create(const uschar * name, const uschar * val, BOOL command_line)
 614 {
 615 macro_item * m = store_get(sizeof(macro_item));
 616
 617 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val); */
 618 m->next = NULL;
 619 m->command_line = command_line;
 620 m->namelen = Ustrlen(name);
 621 m->replen = Ustrlen(val);
 622 m->name = string_copy(name);
 623 m->replacement = string_copy(val);
 624 if (mlast)
 625   mlast->next = m;
 626 else
 627   macros = m;
 628 mlast = m;
 629 if (!macros_user)
 630   macros_user = m;
 631 return m;
 632 }
 633
 634
 635 /* This function is called when a line that starts with an upper case letter is
 636 encountered. The argument "line" should contain a complete logical line, and
 637 start with the first letter of the macro name. The macro name and the
 638 replacement text are extracted and stored. Redefinition of existing,
 639 non-command line, macros is permitted using '==' instead of '='.
 640
 641 Arguments:
 642   s            points to the start of the logical line
 643
 644 Returns:       FALSE iff fatal error
 645 */
 646
 647 BOOL
 648 macro_read_assignment(uschar *s)
 649 {
 650 uschar name[64];
 651 int namelen = 0;
 652 BOOL redef = FALSE;
 653 macro_item *m;
 654
 655 while (isalnum(*s) || *s == '_')
 656   {
 657   if (namelen >= sizeof(name) - 1)
 658     {
 659     log_write(0, LOG_PANIC|LOG_CONFIG_IN,
 660       "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
 661     return FALSE;
 662     }
 663   name[namelen++] = *s++;
 664   }
 665 name[namelen] = 0;
 666
 667 while (isspace(*s)) s++;
 668 if (*s++ != '=')
 669   {
 670   log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
 671   return FALSE;
 672   }
 673
 674 if (*s == '=')
 675   {
 676   redef = TRUE;
 677   s++;
 678   }
 679 while (isspace(*s)) s++;
 680
 681 /* If an existing macro of the same name was defined on the command line, we
 682 just skip this definition. It's an error to attempt to redefine a macro without
 683 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
 684 It is also an error to define a macro whose name begins with the name of a
 685 previously defined macro.  This is the requirement that make using a tree
 686 for macros hard; we must check all macros for the substring.  Perhaps a
 687 sorted list, and a bsearch, would work?
 688 Note: it is documented that the other way round works. */
 689
 690 for (m = macros; m; m = m->next)
 691   {
 692   if (Ustrcmp(m->name, name) == 0)
 693     {
 694     if (!m->command_line && !redef)
 695       {
 696       log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
 697        "defined (use \"==\" if you want to redefine it)", name);
 698       return FALSE;
 699       }
 700     break;
 701     }
 702
 703   if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
 704     {
 705     log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
 706       "a macro because previously defined macro \"%s\" is a substring",
 707       name, m->name);
 708     return FALSE;
 709     }
 710
 711   /* We cannot have this test, because it is documented that a substring
 712   macro is permitted (there is even an example).
 713   *
 714   * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
 715   *   log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
 716   *     "a macro because it is a substring of previously defined macro \"%s\"",
 717   *     name, m->name);
 718   */
 719   }
 720
 721 /* Check for an overriding command-line definition. */
 722
 723 if (m && m->command_line) return TRUE;
 724
 725 /* Redefinition must refer to an existing macro. */
 726
 727 if (redef)
 728   if (m)
 729     {
 730     m->replen = Ustrlen(s);
 731     m->replacement = string_copy(s);
 732     }
 733   else
 734     {
 735     log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
 736       "\"%s\"", name);
 737     return FALSE;
 738     }
 739
 740 /* We have a new definition. */
 741 else
 742   (void) macro_create(name, s, FALSE);
 743 return TRUE;
 744 }
 745
 746
 747
 748
 749
 750 /* Process line for macros. The line is in big_buffer starting at offset len.
 751 Expand big_buffer if needed.  Handle definitions of new macros, and
 752 macro expansions, rewriting the line in the buffer.
 753
 754 Arguments:
 755  len            Offset in buffer of start of line
 756  newlen         Pointer to offset of end of line, updated on return
 757  macro_found    Pointer to return that a macro was expanded
 758
 759 Return: pointer to first nonblank char in line
 760 */
 761
 762 uschar *
 763 macros_expand(int len, int * newlen, BOOL * macro_found)
 764 {
 765 uschar * ss = big_buffer + len;
 766 uschar * s;
 767 macro_item * m;
 768
 769 /* Find the true start of the physical line - leading spaces are always
 770 ignored. */
 771
 772 while (isspace(*ss)) ss++;
 773
 774 /* Process the physical line for macros. If this is the start of the logical
 775 line, skip over initial text at the start of the line if it starts with an
 776 upper case character followed by a sequence of name characters and an equals
 777 sign, because that is the definition of a new macro, and we don't do
 778 replacement therein. */
 779
 780 s = ss;
 781 if (len == 0 && isupper(*s))
 782   {
 783   while (isalnum(*s) || *s == '_') s++;
 784   while (isspace(*s)) s++;
 785   if (*s != '=') s = ss;          /* Not a macro definition */
 786   }
 787
 788 /* Skip leading chars which cannot start a macro name, to avoid multiple
 789 pointless rescans in Ustrstr calls. */
 790
 791 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
 792
 793 /* For each defined macro, scan the line (from after XXX= if present),
 794 replacing all occurrences of the macro. */
 795
 796 *macro_found = FALSE;
 797 if (*s) for (m = *s == '_' ? macros : macros_user; m; m = m->next)
 798   {
 799   uschar * p, *pp;
 800   uschar * t;
 801
 802   while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
 803   if (!*s) break;
 804
 805   t = s;
 806   while ((p = Ustrstr(t, m->name)) != NULL)
 807     {
 808     int moveby;
 809
 810 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, ss); */
 811     /* Expand the buffer if necessary */
 812
 813     while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
 814       {
 815       int newsize = big_buffer_size + BIG_BUFFER_SIZE;
 816       uschar *newbuffer = store_malloc(newsize);
 817       memcpy(newbuffer, big_buffer, *newlen + 1);
 818       p = newbuffer  + (p - big_buffer);
 819       s = newbuffer  + (s - big_buffer);
 820       ss = newbuffer + (ss - big_buffer);
 821       t = newbuffer  + (t - big_buffer);
 822       big_buffer_size = newsize;
 823       store_free(big_buffer);
 824       big_buffer = newbuffer;
 825       }
 826
 827     /* Shuffle the remaining characters up or down in the buffer before
 828     copying in the replacement text. Don't rescan the replacement for this
 829     same macro. */
 830
 831     pp = p + m->namelen;
 832     if ((moveby = m->replen - m->namelen) != 0)
 833       {
 834       memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
 835       *newlen += moveby;
 836       }
 837     Ustrncpy(p, m->replacement, m->replen);
 838     t = p + m->replen;
 839     while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
 840     *macro_found = TRUE;
 841     }
 842   }
 843
 844 /* An empty macro replacement at the start of a line could mean that ss no
 845 longer points to the first non-blank character. */
 846
 847 while (isspace(*ss)) ss++;
 848 return ss;
 849 }
 850
 851 /*************************************************
 852 *            Read configuration line             *
 853 *************************************************/
 854
 855 /* A logical line of text is read from the configuration file into the big
 856 buffer, taking account of macros, .includes, and continuations. The size of
 857 big_buffer is increased if necessary. The count of configuration lines is
 858 maintained. Physical input lines starting with # (ignoring leading white space,
 859 and after macro replacement) and empty logical lines are always ignored.
 860 Leading and trailing spaces are removed.
 861
 862 If we hit a line of the form "begin xxxx", the xxxx is placed in the
 863 next_section vector, and the function returns NULL, indicating the end of a
 864 configuration section. On end-of-file, NULL is returned with next_section
 865 empty.
 866
 867 Arguments:      none
 868
 869 Returns:        a pointer to the first non-blank in the line,
 870                 or NULL if eof or end of section is reached
 871 */
 872
 873 static uschar *
 874 get_config_line(void)
 875 {
 876 int startoffset = 0;         /* To first non-blank char in logical line */
 877 int len = 0;                 /* Of logical line so far */
 878 int newlen;
 879 uschar *s, *ss;
 880 BOOL macro_found;
 881
 882 /* Loop for handling continuation lines, skipping comments, and dealing with
 883 .include files. */
 884
 885 for (;;)
 886   {
 887   if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
 888     {
 889     if (config_file_stack != NULL)    /* EOF inside .include */
 890       {
 891       (void)fclose(config_file);
 892       config_file = config_file_stack->file;
 893       config_filename = config_file_stack->filename;
 894       config_directory = config_file_stack->directory;
 895       config_lineno = config_file_stack->lineno;
 896       config_file_stack = config_file_stack->next;
 897       if (config_lines)
 898         save_config_position(config_filename, config_lineno);
 899       continue;
 900       }
 901
 902     /* EOF at top level */
 903
 904     if (cstate_stack_ptr >= 0)
 905       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
 906         "Unexpected end of configuration file: .endif missing");
 907
 908     if (len != 0) break;        /* EOF after continuation */
 909     next_section[0] = 0;        /* EOF at start of logical line */
 910     return NULL;
 911     }
 912
 913   config_lineno++;
 914   newlen = len + Ustrlen(big_buffer + len);
 915
 916   if (config_lines && config_lineno == 1)
 917     save_config_position(config_filename, config_lineno);
 918
 919   /* Handle pathologically long physical lines - yes, it did happen - by
 920   extending big_buffer at this point. The code also copes with very long
 921   logical lines. */
 922
 923   while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
 924     {
 925     uschar *newbuffer;
 926     big_buffer_size += BIG_BUFFER_SIZE;
 927     newbuffer = store_malloc(big_buffer_size);
 928
 929     /* This use of strcpy is OK because we know that the string in the old
 930     buffer is shorter than the new buffer. */
 931
 932     Ustrcpy(newbuffer, big_buffer);
 933     store_free(big_buffer);
 934     big_buffer = newbuffer;
 935     if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
 936       break;
 937     newlen += Ustrlen(big_buffer + newlen);
 938     }
 939
 940   ss = macros_expand(len, &newlen, &macro_found);
 941
 942   /* Check for comment lines - these are physical lines. */
 943
 944   if (*ss == '#') continue;
 945
 946   /* Handle conditionals, which are also applied to physical lines. Conditions
 947   are of the form ".ifdef ANYTEXT" and are treated as true if any macro
 948   expansion occured on the rest of the line. A preliminary test for the leading
 949   '.' saves effort on most lines. */
 950
 951   if (*ss == '.')
 952     {
 953     int i;
 954
 955     /* Search the list of conditional directives */
 956
 957     for (i = 0; i < cond_list_size; i++)
 958       {
 959       int n;
 960       cond_item *c = cond_list+i;
 961       if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
 962
 963       /* The following character must be white space or end of string */
 964
 965       n = ss[1 + c->namelen];
 966       if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
 967
 968       /* .ifdef and .ifndef push the current state onto the stack, then set
 969       a new one from the table. Stack overflow is an error */
 970
 971       if (c->pushpop > 0)
 972         {
 973         if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
 974           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
 975             ".%s nested too deeply", c->name);
 976         cstate_stack[++cstate_stack_ptr] = cstate;
 977         cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
 978         }
 979
 980       /* For any of the others, stack underflow is an error. The next state
 981       comes either from the stack (.endif) or from the table. */
 982
 983       else
 984         {
 985         if (cstate_stack_ptr < 0)
 986           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
 987             ".%s without matching .ifdef", c->name);
 988         cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
 989           next_cstate[cstate][macro_found? c->action1 : c->action2];
 990         }
 991
 992       /* Having dealt with a directive, break the loop */
 993
 994       break;
 995       }
 996
 997     /* If we have handled a conditional directive, continue with the next
 998     physical line. Otherwise, fall through. */
 999
1000     if (i < cond_list_size) continue;
1001     }
1002
1003   /* If the conditional state is not 0 (actively using these lines), ignore
1004   this input line. */
1005
1006   if (cstate != 0) continue;  /* Conditional skip */
1007
1008   /* Handle .include lines - these are also physical lines. */
1009
1010   if (Ustrncmp(ss, ".include", 8) == 0 &&
1011        (isspace(ss[8]) ||
1012          (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1013     {
1014     uschar *t;
1015     int include_if_exists = isspace(ss[8])? 0 : 10;
1016     config_file_item *save;
1017     struct stat statbuf;
1018
1019     ss += 9 + include_if_exists;
1020     while (isspace(*ss)) ss++;
1021     t = ss + Ustrlen(ss);
1022     while (t > ss && isspace(t[-1])) t--;
1023     if (*ss == '\"' && t[-1] == '\"')
1024       {
1025       ss++;
1026       t--;
1027       }
1028     *t = 0;
1029
1030     /* We allow relative file names. For security reasons currently
1031     relative names not allowed with .include_if_exists. For .include_if_exists
1032     we need to check the permissions/ownership of the containing folder */
1033     if (*ss != '/')
1034       if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1035           "absolute path \"%s\"", ss);
1036       else
1037         {
1038         gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1039         ss = string_from_gstring(g);
1040         }
1041
1042     if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1043
1044     if (config_lines)
1045       save_config_position(config_filename, config_lineno);
1046     save = store_get(sizeof(config_file_item));
1047     save->next = config_file_stack;
1048     config_file_stack = save;
1049     save->file = config_file;
1050     save->filename = config_filename;
1051     save->directory = config_directory;
1052     save->lineno = config_lineno;
1053
1054     if (!(config_file = Ufopen(ss, "rb")))
1055       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1056         "configuration file %s", ss);
1057
1058     config_filename = string_copy(ss);
1059     config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1060     config_lineno = 0;
1061     continue;
1062     }
1063
1064   /* If this is the start of the logical line, remember where the non-blank
1065   data starts. Otherwise shuffle down continuation lines to remove leading
1066   white space. */
1067
1068   if (len == 0)
1069     startoffset = ss - big_buffer;
1070   else
1071     {
1072     s = big_buffer + len;
1073     if (ss > s)
1074       {
1075       memmove(s, ss, (newlen - len) -  (ss - s) + 1);
1076       newlen -= ss - s;
1077       }
1078     }
1079
1080   /* Accept the new addition to the line. Remove trailing white space. */
1081
1082   len = newlen;
1083   while (len > 0 && isspace(big_buffer[len-1])) len--;
1084   big_buffer[len] = 0;
1085
1086   /* We are done if the line does not end in backslash and contains some data.
1087   Empty logical lines are ignored. For continuations, remove the backslash and
1088   go round the loop to read the continuation line. */
1089
1090   if (len > 0)
1091     {
1092     if (big_buffer[len-1] != '\\') break;   /* End of logical line */
1093     big_buffer[--len] = 0;                  /* Remove backslash */
1094     }
1095   }     /* Loop for reading multiple physical lines */
1096
1097 /* We now have a logical line. Test for the end of a configuration section (or,
1098 more accurately, for the start of the next section). Place the name of the next
1099 section in next_section, and return NULL. If the name given is longer than
1100 next_section, truncate it. It will be unrecognized later, because all the known
1101 section names do fit. Leave space for pluralizing. */
1102
1103 s = big_buffer + startoffset;            /* First non-space character */
1104
1105 if (config_lines)
1106   save_config_line(s);
1107
1108 if (strncmpic(s, US"begin ", 6) == 0)
1109   {
1110   s += 6;
1111   while (isspace(*s)) s++;
1112   if (big_buffer + len - s > sizeof(next_section) - 2)
1113     s[sizeof(next_section) - 2] = 0;
1114   Ustrcpy(next_section, s);
1115   return NULL;
1116   }
1117
1118 /* Return the first non-blank character. */
1119
1120 return s;
1121 }
1122
1123
1124
1125 /*************************************************
1126 *             Read a name                        *
1127 *************************************************/
1128
1129 /* The yield is the pointer to the next uschar. Names longer than the
1130 output space are silently truncated. This function is also used from acl.c when
1131 parsing ACLs.
1132
1133 Arguments:
1134   name      where to put the name
1135   len       length of name
1136   s         input pointer
1137
1138 Returns:    new input pointer
1139 */
1140
1141 uschar *
1142 readconf_readname(uschar *name, int len, uschar *s)
1143 {
1144 int p = 0;
1145 while (isspace(*s)) s++;
1146 if (isalpha(*s))
1147   {
1148   while (isalnum(*s) || *s == '_')
1149     {
1150     if (p < len-1) name[p++] = *s;
1151     s++;
1152     }
1153   }
1154 name[p] = 0;
1155 while (isspace(*s)) s++;
1156 return s;
1157 }
1158
1159
1160
1161
1162 /*************************************************
1163 *          Read a time value                     *
1164 *************************************************/
1165
1166 /* This function is also called from outside, to read argument
1167 time values. The format of a time value is:
1168
1169   [<n>w][<n>d][<n>h][<n>m][<n>s]
1170
1171 as long as at least one is present. If a format error is encountered,
1172 return a negative value. The value must be terminated by the given
1173 terminator.
1174
1175 Arguments:
1176   s             input pointer
1177   terminator    required terminating character
1178   return_msec   if TRUE, allow fractional seconds and return milliseconds
1179
1180 Returns:        the time value, or -1 on syntax error
1181                 value is seconds if return_msec is FALSE
1182                 value is milliseconds if return_msec is TRUE
1183 */
1184
1185 int
1186 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1187 {
1188 int yield = 0;
1189 for (;;)
1190   {
1191   int value, count;
1192   double fraction;
1193
1194   if (!isdigit(*s)) return -1;
1195   (void)sscanf(CCS s, "%d%n", &value, &count);
1196   s += count;
1197
1198   switch (*s)
1199     {
1200     case 'w': value *= 7;
1201     case 'd': value *= 24;
1202     case 'h': value *= 60;
1203     case 'm': value *= 60;
1204     case 's': s++;
1205     break;
1206
1207     case '.':
1208     if (!return_msec) return -1;
1209     (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1210     s += count;
1211     if (*s++ != 's') return -1;
1212     yield += (int)(fraction * 1000.0);
1213     break;
1214
1215     default: return -1;
1216     }
1217
1218   if (return_msec) value *= 1000;
1219   yield += value;
1220   if (*s == terminator) return yield;
1221   }
1222 /* Control never reaches here. */
1223 }
1224
1225
1226
1227 /*************************************************
1228 *          Read a fixed point value              *
1229 *************************************************/
1230
1231 /* The value is returned *1000
1232
1233 Arguments:
1234   s           input pointer
1235   terminator  required terminator
1236
1237 Returns:      the value, or -1 on error
1238 */
1239
1240 static int
1241 readconf_readfixed(const uschar *s, int terminator)
1242 {
1243 int yield = 0;
1244 int value, count;
1245 if (!isdigit(*s)) return -1;
1246 (void)sscanf(CS  s, "%d%n", &value, &count);
1247 s += count;
1248 yield = value * 1000;
1249 if (*s == '.')
1250   {
1251   int m = 100;
1252   while (isdigit((*(++s))))
1253     {
1254     yield += (*s - '0') * m;
1255     m /= 10;
1256     }
1257   }
1258
1259 return (*s == terminator)? yield : (-1);
1260 }
1261
1262
1263
1264 /*************************************************
1265 *            Find option in list                 *
1266 *************************************************/
1267
1268 /* The lists are always in order, so binary chop can be used.
1269
1270 Arguments:
1271   name      the option name to search for
1272   ol        the first entry in the option list
1273   last      one more than the offset of the last entry in the option list
1274
1275 Returns:    pointer to an option entry, or NULL if not found
1276 */
1277
1278 static optionlist *
1279 find_option(uschar *name, optionlist *ol, int last)
1280 {
1281 int first = 0;
1282 while (last > first)
1283   {
1284   int middle = (first + last)/2;
1285   int c = Ustrcmp(name, ol[middle].name);
1286
1287   if (c == 0) return ol + middle;
1288   else if (c > 0) first = middle + 1;
1289   else last = middle;
1290   }
1291 return NULL;
1292 }
1293
1294
1295
1296 /*************************************************
1297 *      Find a set flag in option list            *
1298 *************************************************/
1299
1300 /* Because some versions of Unix make no restrictions on the values of uids and
1301 gids (even negative ones), we cannot represent "unset" by a special value.
1302 There is therefore a separate boolean variable for each one indicating whether
1303 a value is set or not. This function returns a pointer to the boolean, given
1304 the original option name. It is a major disaster if the flag cannot be found.
1305
1306 Arguments:
1307   name          the name of the uid or gid option
1308   oltop         points to the start of the relevant option list
1309   last          one more than the offset of the last item in the option list
1310   data_block    NULL when reading main options => data values in the option
1311                   list are absolute addresses; otherwise they are byte offsets
1312                   in data_block (used for driver options)
1313
1314 Returns:        a pointer to the boolean flag.
1315 */
1316
1317 static BOOL *
1318 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1319 {
1320 optionlist *ol;
1321 uschar name2[64];
1322 sprintf(CS name2, "*set_%.50s", name);
1323 ol = find_option(name2, oltop, last);
1324 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1325   "Exim internal error: missing set flag for %s", name);
1326 return (data_block == NULL)? (BOOL *)(ol->value) :
1327   (BOOL *)(US data_block + (long int)(ol->value));
1328 }
1329
1330
1331
1332
1333 /*************************************************
1334 *    Output extra characters message and die     *
1335 *************************************************/
1336
1337 /* Called when an option line has junk on the end. Sometimes this is because
1338 the sysadmin thinks comments are permitted.
1339
1340 Arguments:
1341   s          points to the extra characters
1342   t1..t3     strings to insert in the log message
1343
1344 Returns:     doesn't return; dies
1345 */
1346
1347 static void
1348 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1349 {
1350 uschar *comment = US"";
1351 if (*s == '#') comment = US" (# is comment only at line start)";
1352 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1353   "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1354 }
1355
1356
1357
1358 /*************************************************
1359 *              Read rewrite information          *
1360 *************************************************/
1361
1362 /* Each line of rewrite information contains:
1363
1364 .  A complete address in the form user@domain, possibly with
1365    leading * for each part; or alternatively, a regex.
1366
1367 .  A replacement string (which will be expanded).
1368
1369 .  An optional sequence of one-letter flags, indicating which
1370    headers etc. to apply this rule to.
1371
1372 All this is decoded and placed into a control block. The OR of the flags is
1373 maintained in a common word.
1374
1375 Arguments:
1376   p           points to the string that makes up the rule
1377   existflags  points to the overall flag word
1378   isglobal    TRUE if reading global rewrite rules
1379
1380 Returns:      the control block for the parsed rule.
1381 */
1382
1383 static rewrite_rule *
1384 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1385 {
1386 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1387
1388 next->next = NULL;
1389 next->key = string_dequote(&p);
1390
1391 while (isspace(*p)) p++;
1392 if (*p == 0)
1393   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1394     "missing rewrite replacement string");
1395
1396 next->flags = 0;
1397 next->replacement = string_dequote(&p);
1398
1399 while (*p != 0) switch (*p++)
1400   {
1401   case ' ': case '\t': break;
1402
1403   case 'q': next->flags |= rewrite_quit; break;
1404   case 'w': next->flags |= rewrite_whole; break;
1405
1406   case 'h': next->flags |= rewrite_all_headers; break;
1407   case 's': next->flags |= rewrite_sender; break;
1408   case 'f': next->flags |= rewrite_from; break;
1409   case 't': next->flags |= rewrite_to;   break;
1410   case 'c': next->flags |= rewrite_cc;   break;
1411   case 'b': next->flags |= rewrite_bcc;  break;
1412   case 'r': next->flags |= rewrite_replyto; break;
1413
1414   case 'E': next->flags |= rewrite_all_envelope; break;
1415   case 'F': next->flags |= rewrite_envfrom; break;
1416   case 'T': next->flags |= rewrite_envto; break;
1417
1418   case 'Q': next->flags |= rewrite_qualify; break;
1419   case 'R': next->flags |= rewrite_repeat; break;
1420
1421   case 'S':
1422   next->flags |= rewrite_smtp;
1423   if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1424     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1425       "rewrite rule has the S flag but is not a regular expression");
1426   break;
1427
1428   default:
1429   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1430     "unknown rewrite flag character '%c' "
1431     "(could be missing quotes round replacement item)", p[-1]);
1432   break;
1433   }
1434
1435 /* If no action flags are set, set all the "normal" rewrites. */
1436
1437 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1438   next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1439
1440 /* Remember which exist, for optimization, and return the rule */
1441
1442 *existflags |= next->flags;
1443 return next;
1444 }
1445
1446
1447
1448
1449 /*************************************************
1450 *          Read global rewrite information       *
1451 *************************************************/
1452
1453 /* Each line is a single rewrite rule; it is parsed into a control block
1454 by readconf_one_rewrite(), and its flags are ORed into the global flag
1455 word rewrite_existflags. */
1456
1457 void
1458 readconf_rewrites(void)
1459 {
1460 rewrite_rule **chain = &global_rewrite_rules;
1461 uschar *p;
1462
1463 while ((p = get_config_line()) != NULL)
1464   {
1465   rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1466   *chain = next;
1467   chain = &(next->next);
1468   }
1469 }
1470
1471
1472
1473 /*************************************************
1474 *               Read a string                    *
1475 *************************************************/
1476
1477 /* Strings are read into the normal store pool. As long we aren't too
1478 near the end of the current block, the string will just use what is necessary
1479 on the top of the stacking pool, because string_cat() uses the extension
1480 mechanism.
1481
1482 Argument:
1483   s         the rest of the input line
1484   name      the option name (for errors)
1485
1486 Returns:    pointer to the string
1487 */
1488
1489 static uschar *
1490 read_string(const uschar *s, const uschar *name)
1491 {
1492 uschar *yield;
1493 const uschar *ss;
1494
1495 if (*s != '\"') return string_copy(s);
1496
1497 ss = s;
1498 yield = string_dequote(&s);
1499
1500 if (s == ss+1 || s[-1] != '\"')
1501   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1502     "missing quote at end of string value for %s", name);
1503
1504 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1505
1506 return yield;
1507 }
1508
1509
1510 /*************************************************
1511 *            Custom-handler options              *
1512 *************************************************/
1513 static void
1514 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1515 {
1516 if (*str == '$')
1517   smtp_receive_timeout_s = string_copy(str);
1518 else
1519   {
1520   /* "smtp_receive_timeout",     opt_time,        &smtp_receive_timeout */
1521   smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1522   if (smtp_receive_timeout < 0)
1523     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1524       name);
1525   }
1526 }
1527
1528 /*************************************************
1529 *            Handle option line                  *
1530 *************************************************/
1531
1532 /* This function is called from several places to process a line containing the
1533 setting of an option. The first argument is the line to be decoded; it has been
1534 checked not to be empty and not to start with '#'. Trailing newlines and white
1535 space have been removed. The second argument is a pointer to the list of
1536 variable names that are to be recognized, together with their types and
1537 locations, and the third argument gives the number of entries in the list.
1538
1539 The fourth argument is a pointer to a data block. If it is NULL, then the data
1540 values in the options list are absolute addresses. Otherwise, they are byte
1541 offsets in the data block.
1542
1543 String option data may continue onto several lines; this function reads further
1544 data from config_file if necessary.
1545
1546 The yield of this function is normally zero. If a string continues onto
1547 multiple lines, then the data value is permitted to be followed by a comma
1548 or a semicolon (for use in drivers) and the yield is that character.
1549
1550 Arguments:
1551   buffer        contains the configuration line to be handled
1552   oltop         points to the start of the relevant option list
1553   last          one more than the offset of the last item in the option list
1554   data_block    NULL when reading main options => data values in the option
1555                   list are absolute addresses; otherwise they are byte offsets
1556                   in data_block when they have opt_public set; otherwise
1557                   they are byte offsets in data_block->options_block.
1558   unknown_txt   format string to use in panic message for unknown option;
1559                   must contain %s for option name
1560                 if given as NULL, don't panic on unknown option
1561
1562 Returns:        TRUE if an option was read successfully,
1563                 FALSE false for an unknown option if unknown_txt == NULL,
1564                   otherwise panic and die on an unknown option
1565 */
1566
1567 static BOOL
1568 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1569   void *data_block, uschar *unknown_txt)
1570 {
1571 int ptr = 0;
1572 int offset = 0;
1573 int n, count, type, value;
1574 int issecure = 0;
1575 uid_t uid;
1576 gid_t gid;
1577 BOOL boolvalue = TRUE;
1578 BOOL freesptr = TRUE;
1579 optionlist *ol, *ol2;
1580 struct passwd *pw;
1581 void *reset_point;
1582 int intbase = 0;
1583 uschar *inttype = US"";
1584 uschar *sptr;
1585 uschar *s = buffer;
1586 uschar **str_target;
1587 uschar name[64];
1588 uschar name2[64];
1589
1590 /* There may be leading spaces; thereafter, we expect an option name starting
1591 with a letter. */
1592
1593 while (isspace(*s)) s++;
1594 if (!isalpha(*s))
1595   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1596
1597 /* Read the name of the option, and skip any subsequent white space. If
1598 it turns out that what we read was "hide", set the flag indicating that
1599 this is a secure option, and loop to read the next word. */
1600
1601 for (n = 0; n < 2; n++)
1602   {
1603   while (isalnum(*s) || *s == '_')
1604     {
1605     if (ptr < sizeof(name)-1) name[ptr++] = *s;
1606     s++;
1607     }
1608   name[ptr] = 0;
1609   while (isspace(*s)) s++;
1610   if (Ustrcmp(name, "hide") != 0) break;
1611   issecure = opt_secure;
1612   ptr = 0;
1613   }
1614
1615 /* Deal with "no_" or "not_" here for booleans */
1616
1617 if (Ustrncmp(name, "no_", 3) == 0)
1618   {
1619   boolvalue = FALSE;
1620   offset = 3;
1621   }
1622
1623 if (Ustrncmp(name, "not_", 4) == 0)
1624   {
1625   boolvalue = FALSE;
1626   offset = 4;
1627   }
1628
1629 /* Search the list for the given name. A non-existent name, or an option that
1630 is set twice, is a disaster. */
1631
1632 if (!(ol = find_option(name + offset, oltop, last)))
1633   {
1634   if (unknown_txt == NULL) return FALSE;
1635   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1636   }
1637
1638 if ((ol->type & opt_set)  && !(ol->type & (opt_rep_con | opt_rep_str)))
1639   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1640     "\"%s\" option set for the second time", name);
1641
1642 ol->type |= opt_set | issecure;
1643 type = ol->type & opt_mask;
1644
1645 /* Types with data values must be followed by '='; the "no[t]_" prefix
1646 applies only to boolean values. */
1647
1648 if (type < opt_bool || type > opt_bool_last)
1649   {
1650   if (offset != 0)
1651     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1652       "negation prefix applied to a non-boolean option");
1653   if (*s == 0)
1654     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1655       "unexpected end of line (data missing) after %s", name);
1656   if (*s != '=')
1657     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1658   }
1659
1660 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1661 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1662 ultimately expands to one of those values. */
1663
1664 else if (*s != 0 && (offset != 0 || *s != '='))
1665   extra_chars_error(s, US"boolean option ", name, US"");
1666
1667 /* Skip white space after = */
1668
1669 if (*s == '=') while (isspace((*(++s))));
1670
1671 /* If there is a data block and the opt_public flag is not set, change
1672 the data block pointer to the private options block. */
1673
1674 if (data_block != NULL && (ol->type & opt_public) == 0)
1675   data_block = (void *)(((driver_instance *)data_block)->options_block);
1676
1677 /* Now get the data according to the type. */
1678
1679 switch (type)
1680   {
1681   /* If a string value is not enclosed in quotes, it consists of
1682   the rest of the current line, verbatim. Otherwise, string escapes
1683   are processed.
1684
1685   A transport is specified as a string, which is then looked up in the
1686   list of transports. A search type is specified as one of a number of
1687   known strings.
1688
1689   A set or rewrite rules for a driver is specified as a string, which is
1690   then parsed into a suitable chain of control blocks.
1691
1692   Uids and gids are specified as strings which are then looked up in the
1693   passwd file. Lists of uids and gids are similarly specified as colon-
1694   separated strings. */
1695
1696   case opt_stringptr:
1697   case opt_uid:
1698   case opt_gid:
1699   case opt_expand_uid:
1700   case opt_expand_gid:
1701   case opt_uidlist:
1702   case opt_gidlist:
1703   case opt_rewrite:
1704
1705   reset_point = sptr = read_string(s, name);
1706
1707   /* Having read a string, we now have several different ways of using it,
1708   depending on the data type, so do another switch. If keeping the actual
1709   string is not required (because it is interpreted), freesptr is set TRUE,
1710   and at the end we reset the pool. */
1711
1712   switch (type)
1713     {
1714     /* If this was a string, set the variable to point to the new string,
1715     and set the flag so its store isn't reclaimed. If it was a list of rewrite
1716     rules, we still keep the string (for printing), and parse the rules into a
1717     control block and flags word. */
1718
1719     case opt_stringptr:
1720     str_target = data_block ? USS (US data_block + (long int)(ol->value))
1721                             : USS (ol->value);
1722     if (ol->type & opt_rep_con)
1723       {
1724       uschar * saved_condition;
1725       /* We already have a condition, we're conducting a crude hack to let
1726       multiple condition rules be chained together, despite storing them in
1727       text form. */
1728       *str_target = string_copy_malloc( (saved_condition = *str_target)
1729         ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1730             saved_condition, sptr)
1731         : sptr);
1732       /* TODO(pdp): there is a memory leak here and just below
1733       when we set 3 or more conditions; I still don't
1734       understand the store mechanism enough to know
1735       what's the safe way to free content from an earlier store.
1736       AFAICT, stores stack, so freeing an early stored item also stores
1737       all data alloc'd after it.  If we knew conditions were adjacent,
1738       we could survive that, but we don't.  So I *think* we need to take
1739       another bit from opt_type to indicate "malloced"; this seems like
1740       quite a hack, especially for this one case.  It also means that
1741       we can't ever reclaim the store from the *first* condition.
1742
1743       Because we only do this once, near process start-up, I'm prepared to
1744       let this slide for the time being, even though it rankles.  */
1745       }
1746     else if (ol->type & opt_rep_str)
1747       {
1748       uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1749       int    sep_i = -(int)sep_o;
1750       const uschar * list = sptr;
1751       uschar * s;
1752       gstring * list_o = NULL;
1753
1754       if (*str_target)
1755         {
1756         list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1757         list_o = string_cat(list_o, *str_target);
1758         }
1759
1760       while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1761         list_o = string_append_listele(list_o, sep_o, s);
1762
1763       if (list_o)
1764         *str_target = string_copy_malloc(string_from_gstring(list_o));
1765       }
1766     else
1767       {
1768       *str_target = sptr;
1769       freesptr = FALSE;
1770       }
1771     break;
1772
1773     case opt_rewrite:
1774     if (data_block)
1775       *USS (US data_block + (long int)(ol->value)) = sptr;
1776     else
1777       *USS (ol->value) = sptr;
1778     freesptr = FALSE;
1779     if (type == opt_rewrite)
1780       {
1781       int sep = 0;
1782       int *flagptr;
1783       uschar *p = sptr;
1784       rewrite_rule **chain;
1785       optionlist *ol3;
1786
1787       sprintf(CS name2, "*%.50s_rules", name);
1788       ol2 = find_option(name2, oltop, last);
1789       sprintf(CS name2, "*%.50s_flags", name);
1790       ol3 = find_option(name2, oltop, last);
1791
1792       if (ol2 == NULL || ol3 == NULL)
1793         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1794           "rewrite rules not available for driver");
1795
1796       if (data_block == NULL)
1797         {
1798         chain = (rewrite_rule **)(ol2->value);
1799         flagptr = (int *)(ol3->value);
1800         }
1801       else
1802         {
1803         chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1804         flagptr = (int *)(US data_block + (long int)(ol3->value));
1805         }
1806
1807       while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1808         {
1809         rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1810         *chain = next;
1811         chain = &(next->next);
1812         }
1813
1814       if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1815         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1816           "non-header rewrite - not allowed at transport time -");
1817       }
1818     break;
1819
1820     /* If it was an expanded uid, see if there is any expansion to be
1821     done by checking for the presence of a $ character. If there is, save it
1822     in the corresponding *expand_user option field. Otherwise, fall through
1823     to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1824     of data. */
1825
1826     case opt_expand_uid:
1827     sprintf(CS name2, "*expand_%.50s", name);
1828     ol2 = find_option(name2, oltop, last);
1829     if (ol2 != NULL)
1830       {
1831       uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1832
1833       if (data_block == NULL)
1834         *((uschar **)(ol2->value)) = ss;
1835       else
1836         *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1837
1838       if (ss != NULL)
1839         {
1840         *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1841         freesptr = FALSE;
1842         break;
1843         }
1844       }
1845
1846     /* Look up a fixed uid, and also make use of the corresponding gid
1847     if a passwd entry is returned and the gid has not been set. */
1848
1849     case opt_uid:
1850     if (!route_finduser(sptr, &pw, &uid))
1851       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1852     if (data_block == NULL)
1853       *((uid_t *)(ol->value)) = uid;
1854     else
1855       *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1856
1857     /* Set the flag indicating a fixed value is set */
1858
1859     *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1860
1861     /* Handle matching gid if we have a passwd entry: done by finding the
1862     same name with terminating "user" changed to "group"; if not found,
1863     ignore. Also ignore if the value is already set. */
1864
1865     if (pw == NULL) break;
1866     Ustrcpy(name+Ustrlen(name)-4, "group");
1867     ol2 = find_option(name, oltop, last);
1868     if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1869         (ol2->type & opt_mask) == opt_expand_gid))
1870       {
1871       BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1872       if (! *set_flag)
1873         {
1874         if (data_block == NULL)
1875           *((gid_t *)(ol2->value)) = pw->pw_gid;
1876         else
1877           *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1878         *set_flag = TRUE;
1879         }
1880       }
1881     break;
1882
1883     /* If it was an expanded gid, see if there is any expansion to be
1884     done by checking for the presence of a $ character. If there is, save it
1885     in the corresponding *expand_user option field. Otherwise, fall through
1886     to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1887     of data. */
1888
1889     case opt_expand_gid:
1890     sprintf(CS name2, "*expand_%.50s", name);
1891     ol2 = find_option(name2, oltop, last);
1892     if (ol2 != NULL)
1893       {
1894       uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1895
1896       if (data_block == NULL)
1897         *((uschar **)(ol2->value)) = ss;
1898       else
1899         *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1900
1901       if (ss != NULL)
1902         {
1903         *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1904         freesptr = FALSE;
1905         break;
1906         }
1907       }
1908
1909     /* Handle freestanding gid */
1910
1911     case opt_gid:
1912     if (!route_findgroup(sptr, &gid))
1913       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1914     if (data_block == NULL)
1915       *((gid_t *)(ol->value)) = gid;
1916     else
1917       *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1918     *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1919     break;
1920
1921     /* If it was a uid list, look up each individual entry, and build
1922     a vector of uids, with a count in the first element. Put the vector
1923     in malloc store so we can free the string. (We are reading into
1924     permanent store already.) */
1925
1926     case opt_uidlist:
1927       {
1928       int count = 1;
1929       uid_t *list;
1930       int ptr = 0;
1931       const uschar *p;
1932       const uschar *op = expand_string (sptr);
1933
1934       if (op == NULL)
1935         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1936           name, expand_string_message);
1937
1938       p = op;
1939       if (*p != 0) count++;
1940       while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1941       list = store_malloc(count*sizeof(uid_t));
1942       list[ptr++] = (uid_t)(count - 1);
1943
1944       if (data_block == NULL)
1945         *((uid_t **)(ol->value)) = list;
1946       else
1947         *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1948
1949       p = op;
1950       while (count-- > 1)
1951         {
1952         int sep = 0;
1953         (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1954         if (!route_finduser(big_buffer, NULL, &uid))
1955           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1956             big_buffer);
1957         list[ptr++] = uid;
1958         }
1959       }
1960     break;
1961
1962     /* If it was a gid list, look up each individual entry, and build
1963     a vector of gids, with a count in the first element. Put the vector
1964     in malloc store so we can free the string. (We are reading into permanent
1965     store already.) */
1966
1967     case opt_gidlist:
1968       {
1969       int count = 1;
1970       gid_t *list;
1971       int ptr = 0;
1972       const uschar *p;
1973       const uschar *op = expand_string (sptr);
1974
1975       if (op == NULL)
1976         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1977           name, expand_string_message);
1978
1979       p = op;
1980       if (*p != 0) count++;
1981       while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1982       list = store_malloc(count*sizeof(gid_t));
1983       list[ptr++] = (gid_t)(count - 1);
1984
1985       if (data_block == NULL)
1986         *((gid_t **)(ol->value)) = list;
1987       else
1988         *((gid_t **)(US data_block + (long int)(ol->value))) = list;
1989
1990       p = op;
1991       while (count-- > 1)
1992         {
1993         int sep = 0;
1994         (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1995         if (!route_findgroup(big_buffer, &gid))
1996           log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1997             big_buffer);
1998         list[ptr++] = gid;
1999         }
2000       }
2001     break;
2002     }
2003
2004   /* Release store if the value of the string doesn't need to be kept. */
2005
2006   if (freesptr) store_reset(reset_point);
2007   break;
2008
2009   /* Expanded boolean: if no characters follow, or if there are no dollar
2010   characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2011   save the string for later expansion in the alternate place. */
2012
2013   case opt_expand_bool:
2014   if (*s != 0 && Ustrchr(s, '$') != 0)
2015     {
2016     sprintf(CS name2, "*expand_%.50s", name);
2017     ol2 = find_option(name2, oltop, last);
2018     if (ol2 != NULL)
2019       {
2020       reset_point = sptr = read_string(s, name);
2021       if (data_block == NULL)
2022         *((uschar **)(ol2->value)) = sptr;
2023       else
2024         *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2025       freesptr = FALSE;
2026       break;
2027       }
2028     }
2029   /* Fall through */
2030
2031   /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2032   look for yes/not/true/false. Some booleans are stored in a single bit in
2033   a single int. There's a special fudge for verify settings; without a suffix
2034   they set both xx_sender and xx_recipient. The table points to the sender
2035   value; search subsequently for the recipient. There's another special case:
2036   opt_bool_set also notes when a boolean has been set. */
2037
2038   case opt_bool:
2039   case opt_bit:
2040   case opt_bool_verify:
2041   case opt_bool_set:
2042   if (*s != 0)
2043     {
2044     s = readconf_readname(name2, 64, s);
2045     if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2046       boolvalue = TRUE;
2047     else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2048       boolvalue = FALSE;
2049     else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2050       "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2051     if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2052       US"for boolean option ", name);
2053     }
2054
2055   /* Handle single-bit type. */
2056
2057   if (type == opt_bit)
2058     {
2059     int bit = 1 << ((ol->type >> 16) & 31);
2060     int *ptr = (data_block == NULL)?
2061       (int *)(ol->value) :
2062       (int *)(US data_block + (long int)ol->value);
2063     if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2064     break;
2065     }
2066
2067   /* Handle full BOOL types */
2068
2069   if (data_block == NULL)
2070     *((BOOL *)(ol->value)) = boolvalue;
2071   else
2072     *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2073
2074   /* Verify fudge */
2075
2076   if (type == opt_bool_verify)
2077     {
2078     sprintf(CS name2, "%.50s_recipient", name + offset);
2079     ol2 = find_option(name2, oltop, last);
2080     if (ol2 != NULL)
2081       {
2082       if (data_block == NULL)
2083         *((BOOL *)(ol2->value)) = boolvalue;
2084       else
2085         *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2086       }
2087     }
2088
2089   /* Note that opt_bool_set type is set, if there is somewhere to do so */
2090
2091   else if (type == opt_bool_set)
2092     {
2093     sprintf(CS name2, "*set_%.50s", name + offset);
2094     ol2 = find_option(name2, oltop, last);
2095     if (ol2 != NULL)
2096       {
2097       if (data_block == NULL)
2098         *((BOOL *)(ol2->value)) = TRUE;
2099       else
2100         *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2101       }
2102     }
2103   break;
2104
2105   /* Octal integer */
2106
2107   case opt_octint:
2108   intbase = 8;
2109   inttype = US"octal ";
2110
2111   /*  Integer: a simple(ish) case; allow octal and hex formats, and
2112   suffixes K, M and G. The different types affect output, not input. */
2113
2114   case opt_mkint:
2115   case opt_int:
2116     {
2117     uschar *endptr;
2118     long int lvalue;
2119
2120     errno = 0;
2121     lvalue = strtol(CS s, CSS &endptr, intbase);
2122
2123     if (endptr == s)
2124       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2125         inttype, name);
2126
2127     if (errno != ERANGE)
2128       if (tolower(*endptr) == 'k')
2129         {
2130         if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2131           else lvalue *= 1024;
2132         endptr++;
2133         }
2134       else if (tolower(*endptr) == 'm')
2135         {
2136         if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2137           errno = ERANGE;
2138         else lvalue *= 1024*1024;
2139         endptr++;
2140         }
2141       else if (tolower(*endptr) == 'g')
2142         {
2143         if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2144           errno = ERANGE;
2145         else lvalue *= 1024*1024*1024;
2146         endptr++;
2147         }
2148
2149     if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2150       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2151         "absolute value of integer \"%s\" is too large (overflow)", s);
2152
2153     while (isspace(*endptr)) endptr++;
2154     if (*endptr != 0)
2155       extra_chars_error(endptr, inttype, US"integer value for ", name);
2156
2157     value = (int)lvalue;
2158     }
2159
2160   if (data_block == NULL)
2161     *((int *)(ol->value)) = value;
2162   else
2163     *((int *)(US data_block + (long int)(ol->value))) = value;
2164   break;
2165
2166   /*  Integer held in K: again, allow octal and hex formats, and suffixes K, M
2167   and G. */
2168   /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2169
2170   case opt_Kint:
2171     {
2172     uschar *endptr;
2173     errno = 0;
2174     value = strtol(CS s, CSS &endptr, intbase);
2175
2176     if (endptr == s)
2177       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2178         inttype, name);
2179
2180     if (errno != ERANGE)
2181       if (tolower(*endptr) == 'g')
2182         {
2183         if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2184           errno = ERANGE;
2185         else
2186           value *= 1024*1024;
2187         endptr++;
2188         }
2189       else if (tolower(*endptr) == 'm')
2190         {
2191         if (value > INT_MAX/1024 || value < INT_MIN/1024)
2192           errno = ERANGE;
2193         else
2194           value *= 1024;
2195         endptr++;
2196         }
2197       else if (tolower(*endptr) == 'k')
2198         endptr++;
2199       else
2200         value = (value + 512)/1024;
2201
2202     if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2203       "absolute value of integer \"%s\" is too large (overflow)", s);
2204
2205     while (isspace(*endptr)) endptr++;
2206     if (*endptr != 0)
2207       extra_chars_error(endptr, inttype, US"integer value for ", name);
2208     }
2209
2210   if (data_block == NULL)
2211     *((int *)(ol->value)) = value;
2212   else
2213     *((int *)(US data_block + (long int)(ol->value))) = value;
2214   break;
2215
2216   /*  Fixed-point number: held to 3 decimal places. */
2217
2218   case opt_fixed:
2219   if (sscanf(CS s, "%d%n", &value, &count) != 1)
2220     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2221       "fixed-point number expected for %s", name);
2222
2223   if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2224     "integer \"%s\" is too large (overflow)", s);
2225
2226   value *= 1000;
2227
2228   if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2229     "integer \"%s\" is too large (overflow)", s);
2230
2231   /* We get a coverity error here for using count, as it derived
2232   from the tainted buffer pointed to by s, as parsed by sscanf().
2233   By the definition of sscanf we must be accessing between start
2234   and end of s (assuming it is nul-terminated...) so ignore the error.  */
2235   /* coverity[tainted_data] */
2236   if (s[count] == '.')
2237     {
2238     int d = 100;
2239     while (isdigit(s[++count]))
2240       {
2241       value += (s[count] - '0') * d;
2242       d /= 10;
2243       }
2244     }
2245
2246   while (isspace(s[count])) count++;
2247
2248   if (s[count] != 0)
2249     extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2250
2251   if (data_block == NULL)
2252     *((int *)(ol->value)) = value;
2253   else
2254     *((int *)(US data_block + (long int)(ol->value))) = value;
2255   break;
2256
2257   /* There's a special routine to read time values. */
2258
2259   case opt_time:
2260   value = readconf_readtime(s, 0, FALSE);
2261   if (value < 0)
2262     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2263       name);
2264   if (data_block == NULL)
2265     *((int *)(ol->value)) = value;
2266   else
2267     *((int *)(US data_block + (long int)(ol->value))) = value;
2268   break;
2269
2270   /* A time list is a list of colon-separated times, with the first
2271   element holding the size of the list and the second the number of
2272   entries used. */
2273
2274   case opt_timelist:
2275     {
2276     int count = 0;
2277     int *list = (data_block == NULL)?
2278       (int *)(ol->value) :
2279       (int *)(US data_block + (long int)(ol->value));
2280
2281     if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2282       {
2283       int terminator = 0;
2284       uschar *snext = Ustrchr(s, ':');
2285       if (snext != NULL)
2286         {
2287         uschar *ss = snext;
2288         while (ss > s && isspace(ss[-1])) ss--;
2289         terminator = *ss;
2290         }
2291       value = readconf_readtime(s, terminator, FALSE);
2292       if (value < 0)
2293         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2294           name);
2295       if (count > 1 && value <= list[count])
2296         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2297           "time value out of order for %s", name);
2298       list[count+1] = value;
2299       if (snext == NULL) break;
2300       s = snext + 1;
2301       while (isspace(*s)) s++;
2302       }
2303
2304     if (count > list[0] - 2)
2305       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2306         name);
2307     if (count > 0 && list[2] == 0) count = 0;
2308     list[1] = count;
2309     break;
2310     }
2311
2312   case opt_func:
2313     {
2314     void (*fn)() = ol->value;
2315     fn(name, s);
2316     break;
2317     }
2318   }
2319
2320 return TRUE;
2321 }
2322
2323
2324
2325 /*************************************************
2326 *               Print a time value               *
2327 *************************************************/
2328
2329 /*
2330 Argument:  a time value in seconds
2331 Returns:   pointer to a fixed buffer containing the time as a string,
2332            in readconf_readtime() format
2333 */
2334
2335 uschar *
2336 readconf_printtime(int t)
2337 {
2338 int s, m, h, d, w;
2339 uschar *p = time_buffer;
2340
2341 if (t < 0)
2342   {
2343   *p++ = '-';
2344   t = -t;
2345   }
2346
2347 s = t % 60;
2348 t /= 60;
2349 m = t % 60;
2350 t /= 60;
2351 h = t % 24;
2352 t /= 24;
2353 d = t % 7;
2354 w = t/7;
2355
2356 if (w > 0) p += sprintf(CS p, "%dw", w);
2357 if (d > 0) p += sprintf(CS p, "%dd", d);
2358 if (h > 0) p += sprintf(CS p, "%dh", h);
2359 if (m > 0) p += sprintf(CS p, "%dm", m);
2360 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2361
2362 return time_buffer;
2363 }
2364
2365
2366
2367 /*************************************************
2368 *      Print an individual option value          *
2369 *************************************************/
2370
2371 /* This is used by the -bP option, so prints to the standard output.
2372 The entire options list is passed in as an argument, because some options come
2373 in pairs - typically uid/gid settings, which can either be explicit numerical
2374 values, or strings to be expanded later. If the numerical value is unset,
2375 search for "*expand_<name>" to see if there is a string equivalent.
2376
2377 Arguments:
2378   ol             option entry, or NULL for an unknown option
2379   name           option name
2380   options_block  NULL for main configuration options; otherwise points to
2381                    a driver block; if the option doesn't have opt_public
2382                    set, then options_block->options_block is where the item
2383                    resides.
2384   oltop          points to the option list in which ol exists
2385   last           one more than the offset of the last entry in optop
2386   no_labels      do not show "foo = " at the start.
2387
2388 Returns:         boolean success
2389 */
2390
2391 static BOOL
2392 print_ol(optionlist *ol, uschar *name, void *options_block,
2393   optionlist *oltop, int last, BOOL no_labels)
2394 {
2395 struct passwd *pw;
2396 struct group *gr;
2397 optionlist *ol2;
2398 void *value;
2399 uid_t *uidlist;
2400 gid_t *gidlist;
2401 uschar *s;
2402 uschar name2[64];
2403
2404 if (!ol)
2405   {
2406   printf("%s is not a known option\n", name);
2407   return FALSE;
2408   }
2409
2410 /* Non-admin callers cannot see options that have been flagged secure by the
2411 "hide" prefix. */
2412
2413 if (!admin_user && ol->type & opt_secure)
2414   {
2415   if (no_labels)
2416     printf("%s\n", hidden);
2417   else
2418     printf("%s = %s\n", name, hidden);
2419   return TRUE;
2420   }
2421
2422 /* Else show the value of the option */
2423
2424 value = ol->value;
2425 if (options_block)
2426   {
2427   if (!(ol->type & opt_public))
2428     options_block = (void *)(((driver_instance *)options_block)->options_block);
2429   value = (void *)(US options_block + (long int)value);
2430   }
2431
2432 switch(ol->type & opt_mask)
2433   {
2434   case opt_stringptr:
2435   case opt_rewrite:        /* Show the text value */
2436     s = *(USS value);
2437     if (!no_labels) printf("%s = ", name);
2438     printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2439     break;
2440
2441   case opt_int:
2442     if (!no_labels) printf("%s = ", name);
2443     printf("%d\n", *((int *)value));
2444     break;
2445
2446   case opt_mkint:
2447     {
2448     int x = *((int *)value);
2449     if (x != 0 && (x & 1023) == 0)
2450       {
2451       int c = 'K';
2452       x >>= 10;
2453       if ((x & 1023) == 0)
2454         {
2455         c = 'M';
2456         x >>= 10;
2457         }
2458       if (!no_labels) printf("%s = ", name);
2459       printf("%d%c\n", x, c);
2460       }
2461     else
2462       {
2463       if (!no_labels) printf("%s = ", name);
2464       printf("%d\n", x);
2465       }
2466     }
2467     break;
2468
2469   case opt_Kint:
2470     {
2471     int x = *((int *)value);
2472     if (!no_labels) printf("%s = ", name);
2473     if (x == 0) printf("0\n");
2474     else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2475     else printf("%dK\n", x);
2476     }
2477     break;
2478
2479   case opt_octint:
2480     if (!no_labels) printf("%s = ", name);
2481     printf("%#o\n", *((int *)value));
2482     break;
2483
2484   /* Can be negative only when "unset", in which case integer */
2485
2486   case opt_fixed:
2487     {
2488     int x = *((int *)value);
2489     int f = x % 1000;
2490     int d = 100;
2491     if (x < 0) printf("%s =\n", name); else
2492       {
2493       if (!no_labels) printf("%s = ", name);
2494       printf("%d.", x/1000);
2495       do
2496         {
2497         printf("%d", f/d);
2498         f %= d;
2499         d /= 10;
2500         }
2501       while (f != 0);
2502       printf("\n");
2503       }
2504     }
2505     break;
2506
2507   /* If the numerical value is unset, try for the string value */
2508
2509   case opt_expand_uid:
2510     if (! *get_set_flag(name, oltop, last, options_block))
2511       {
2512       sprintf(CS name2, "*expand_%.50s", name);
2513       if ((ol2 = find_option(name2, oltop, last)))
2514         {
2515         void *value2 = ol2->value;
2516         if (options_block)
2517           value2 = (void *)(US options_block + (long int)value2);
2518         s = *(USS value2);
2519         if (!no_labels) printf("%s = ", name);
2520         printf("%s\n", s ? string_printing(s) : US"");
2521         break;
2522         }
2523       }
2524
2525     /* Else fall through */
2526
2527   case opt_uid:
2528     if (!no_labels) printf("%s = ", name);
2529     if (! *get_set_flag(name, oltop, last, options_block))
2530       printf("\n");
2531     else
2532       if ((pw = getpwuid(*((uid_t *)value))))
2533         printf("%s\n", pw->pw_name);
2534       else
2535         printf("%ld\n", (long int)(*((uid_t *)value)));
2536     break;
2537
2538   /* If the numerical value is unset, try for the string value */
2539
2540   case opt_expand_gid:
2541     if (! *get_set_flag(name, oltop, last, options_block))
2542       {
2543       sprintf(CS name2, "*expand_%.50s", name);
2544       if (  (ol2 = find_option(name2, oltop, last))
2545          && (ol2->type & opt_mask) == opt_stringptr)
2546         {
2547         void *value2 = ol2->value;
2548         if (options_block)
2549           value2 = (void *)(US options_block + (long int)value2);
2550         s = *(USS value2);
2551         if (!no_labels) printf("%s = ", name);
2552         printf("%s\n", s ? string_printing(s) : US"");
2553         break;
2554         }
2555       }
2556
2557     /* Else fall through */
2558
2559   case opt_gid:
2560     if (!no_labels) printf("%s = ", name);
2561     if (! *get_set_flag(name, oltop, last, options_block))
2562       printf("\n");
2563     else
2564       if ((gr = getgrgid(*((int *)value))))
2565         printf("%s\n", gr->gr_name);
2566       else
2567          printf("%ld\n", (long int)(*((int *)value)));
2568     break;
2569
2570   case opt_uidlist:
2571     uidlist = *((uid_t **)value);
2572     if (!no_labels) printf("%s =", name);
2573     if (uidlist)
2574       {
2575       int i;
2576       uschar sep = no_labels ? '\0' : ' ';
2577       for (i = 1; i <= (int)(uidlist[0]); i++)
2578         {
2579         uschar *name = NULL;
2580         if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2581         if (sep != '\0') printf("%c", sep);
2582         if (name) printf("%s", name);
2583         else printf("%ld", (long int)(uidlist[i]));
2584         sep = ':';
2585         }
2586       }
2587     printf("\n");
2588     break;
2589
2590   case opt_gidlist:
2591     gidlist = *((gid_t **)value);
2592     if (!no_labels) printf("%s =", name);
2593     if (gidlist)
2594       {
2595       int i;
2596       uschar sep = no_labels ? '\0' : ' ';
2597       for (i = 1; i <= (int)(gidlist[0]); i++)
2598         {
2599         uschar *name = NULL;
2600         if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2601         if (sep != '\0') printf("%c", sep);
2602         if (name) printf("%s", name);
2603         else printf("%ld", (long int)(gidlist[i]));
2604         sep = ':';
2605         }
2606       }
2607     printf("\n");
2608     break;
2609
2610   case opt_time:
2611     if (!no_labels) printf("%s = ", name);
2612     printf("%s\n", readconf_printtime(*((int *)value)));
2613     break;
2614
2615   case opt_timelist:
2616     {
2617     int i;
2618     int *list = (int *)value;
2619     if (!no_labels) printf("%s = ", name);
2620     for (i = 0; i < list[1]; i++)
2621       printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2622     printf("\n");
2623     }
2624     break;
2625
2626   case opt_bit:
2627     printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2628       "" : "no_", name);
2629     break;
2630
2631   case opt_expand_bool:
2632     sprintf(CS name2, "*expand_%.50s", name);
2633     if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2634       {
2635       void *value2 = ol2->value;
2636       if (options_block)
2637         value2 = (void *)(US options_block + (long int)value2);
2638       s = *(USS value2);
2639       if (s)
2640         {
2641         if (!no_labels) printf("%s = ", name);
2642         printf("%s\n", string_printing(s));
2643         break;
2644         }
2645       /* s == NULL => string not set; fall through */
2646       }
2647
2648     /* Fall through */
2649
2650   case opt_bool:
2651   case opt_bool_verify:
2652   case opt_bool_set:
2653     printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2654     break;
2655   }
2656 return TRUE;
2657 }
2658
2659
2660
2661 /*************************************************
2662 *        Print value from main configuration     *
2663 *************************************************/
2664
2665 /* This function, called as a result of encountering the -bP option,
2666 causes the value of any main configuration variable to be output if the
2667 second argument is NULL. There are some special values:
2668
2669   all                print all main configuration options
2670   config_file        print the name of the configuration file
2671                      (configure_file will still work, for backward
2672                      compatibility)
2673   routers            print the routers' configurations
2674   transports         print the transports' configuration
2675   authenticators     print the authenticators' configuration
2676   macros             print the macros' configuration
2677   router_list        print a list of router names
2678   transport_list     print a list of transport names
2679   authenticator_list print a list of authentication mechanism names
2680   macro_list         print a list of macro names
2681   +name              print a named list item
2682   local_scan         print the local_scan options
2683   config             print the configuration as it is parsed
2684   environment        print the used execution environment
2685
2686 If the second argument is not NULL, it must be one of "router", "transport",
2687 "authenticator" or "macro" in which case the first argument identifies the
2688 driver whose options are to be printed.
2689
2690 Arguments:
2691   name        option name if type == NULL; else driver name
2692   type        NULL or driver type name, as described above
2693   no_labels   avoid the "foo = " at the start of an item
2694
2695 Returns:      Boolean success
2696 */
2697
2698 BOOL
2699 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2700 {
2701 BOOL names_only = FALSE;
2702 optionlist *ol;
2703 optionlist *ol2 = NULL;
2704 driver_instance *d = NULL;
2705 macro_item *m;
2706 int size = 0;
2707
2708 if (!type)
2709   {
2710   if (*name == '+')
2711     {
2712     int i;
2713     tree_node *t;
2714     BOOL found = FALSE;
2715     static uschar *types[] = { US"address", US"domain", US"host",
2716       US"localpart" };
2717     static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2718       &hostlist_anchor, &localpartlist_anchor };
2719
2720     for (i = 0; i < 4; i++)
2721       if ((t = tree_search(*(anchors[i]), name+1)))
2722         {
2723         found = TRUE;
2724         if (no_labels)
2725           printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2726         else
2727           printf("%slist %s = %s\n", types[i], name+1,
2728             ((namedlist_block *)(t->data.ptr))->string);
2729         }
2730
2731     if (!found)
2732       printf("no address, domain, host, or local part list called \"%s\" "
2733         "exists\n", name+1);
2734
2735     return found;
2736     }
2737
2738   if (  Ustrcmp(name, "configure_file") == 0
2739      || Ustrcmp(name, "config_file") == 0)
2740     {
2741     printf("%s\n", CS config_main_filename);
2742     return TRUE;
2743     }
2744
2745   if (Ustrcmp(name, "all") == 0)
2746     {
2747     for (ol = optionlist_config;
2748          ol < optionlist_config + nelem(optionlist_config); ol++)
2749       if (!(ol->type & opt_hidden))
2750         (void) print_ol(ol, US ol->name, NULL,
2751                   optionlist_config, nelem(optionlist_config),
2752                   no_labels);
2753     return TRUE;
2754     }
2755
2756   if (Ustrcmp(name, "local_scan") == 0)
2757     {
2758 #ifndef LOCAL_SCAN_HAS_OPTIONS
2759     printf("local_scan() options are not supported\n");
2760     return FALSE;
2761 #else
2762     for (ol = local_scan_options;
2763          ol < local_scan_options + local_scan_options_count; ol++)
2764       (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2765                   local_scan_options_count, no_labels);
2766     return TRUE;
2767 #endif
2768     }
2769
2770   if (Ustrcmp(name, "config") == 0)
2771     {
2772     print_config(admin_user, no_labels);
2773     return TRUE;
2774     }
2775
2776   if (Ustrcmp(name, "routers") == 0)
2777     {
2778     type = US"router";
2779     name = NULL;
2780     }
2781   else if (Ustrcmp(name, "transports") == 0)
2782     {
2783     type = US"transport";
2784     name = NULL;
2785     }
2786   else if (Ustrcmp(name, "authenticators") == 0)
2787     {
2788     type = US"authenticator";
2789     name = NULL;
2790     }
2791   else if (Ustrcmp(name, "macros") == 0)
2792     {
2793     type = US"macro";
2794     name = NULL;
2795     }
2796   else if (Ustrcmp(name, "router_list") == 0)
2797     {
2798     type = US"router";
2799     name = NULL;
2800     names_only = TRUE;
2801     }
2802   else if (Ustrcmp(name, "transport_list") == 0)
2803     {
2804     type = US"transport";
2805     name = NULL;
2806     names_only = TRUE;
2807     }
2808   else if (Ustrcmp(name, "authenticator_list") == 0)
2809     {
2810     type = US"authenticator";
2811     name = NULL;
2812     names_only = TRUE;
2813     }
2814   else if (Ustrcmp(name, "macro_list") == 0)
2815     {
2816     type = US"macro";
2817     name = NULL;
2818     names_only = TRUE;
2819     }
2820   else if (Ustrcmp(name, "environment") == 0)
2821     {
2822     if (environ)
2823       {
2824       uschar ** p;
2825       for (p = USS environ; *p; p++) ;
2826       qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2827
2828       for (p = USS environ; *p; p++)
2829         {
2830         uschar * q;
2831         if (no_labels && (q = Ustrchr(*p, '='))) *q  = '\0';
2832         puts(CS *p);
2833         }
2834       }
2835     return TRUE;
2836     }
2837
2838   else
2839     return print_ol(find_option(name,
2840       optionlist_config, nelem(optionlist_config)),
2841       name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2842   }
2843
2844 /* Handle the options for a router or transport. Skip options that are flagged
2845 as hidden. Some of these are options with names starting with '*', used for
2846 internal alternative representations of other options (which the printing
2847 function will sort out). Others are synonyms kept for backward compatibility.
2848 */
2849
2850 if (Ustrcmp(type, "router") == 0)
2851   {
2852   d = (driver_instance *)routers;
2853   ol2 = optionlist_routers;
2854   size = optionlist_routers_size;
2855   }
2856 else if (Ustrcmp(type, "transport") == 0)
2857   {
2858   d = (driver_instance *)transports;
2859   ol2 = optionlist_transports;
2860   size = optionlist_transports_size;
2861   }
2862 else if (Ustrcmp(type, "authenticator") == 0)
2863   {
2864   d = (driver_instance *)auths;
2865   ol2 = optionlist_auths;
2866   size = optionlist_auths_size;
2867   }
2868
2869 else if (Ustrcmp(type, "macro") == 0)
2870   {
2871   /* People store passwords in macros and they were previously not available
2872   for printing.  So we have an admin_users restriction. */
2873   if (!admin_user)
2874     {
2875     fprintf(stderr, "exim: permission denied\n");
2876     return FALSE;
2877     }
2878   for (m = macros; m; m = m->next)
2879     if (!name || Ustrcmp(name, m->name) == 0)
2880       {
2881       if (names_only)
2882         printf("%s\n", CS m->name);
2883       else
2884         printf("%s=%s\n", CS m->name, CS m->replacement);
2885       if (name)
2886         return TRUE;
2887       }
2888   if (!name) return TRUE;
2889
2890   printf("%s %s not found\n", type, name);
2891   return FALSE;
2892   }
2893
2894 if (names_only)
2895   {
2896   for (; d; d = d->next) printf("%s\n", CS d->name);
2897   return TRUE;
2898   }
2899
2900 /* Either search for a given driver, or print all of them */
2901
2902 for (; d; d = d->next)
2903   {
2904   BOOL rc = FALSE;
2905   if (!name)
2906     printf("\n%s %s:\n", d->name, type);
2907   else if (Ustrcmp(d->name, name) != 0) continue;
2908
2909   for (ol = ol2; ol < ol2 + size; ol++)
2910     if (!(ol->type & opt_hidden))
2911       rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2912
2913   for (ol = d->info->options;
2914        ol < d->info->options + *(d->info->options_count); ol++)
2915     if (!(ol->type & opt_hidden))
2916       rc |= print_ol(ol, US ol->name, d, d->info->options,
2917                     *d->info->options_count, no_labels);
2918
2919   if (name) return rc;
2920   }
2921 if (!name) return TRUE;
2922
2923 printf("%s %s not found\n", type, name);
2924 return FALSE;
2925 }
2926
2927
2928
2929 /*************************************************
2930 *          Read a named list item                *
2931 *************************************************/
2932
2933 /* This function reads a name and a list (i.e. string). The name is used to
2934 save the list in a tree, sorted by its name. Each entry also has a number,
2935 which can be used for caching tests, but if the string contains any expansion
2936 items other than $key, the number is set negative to inhibit caching. This
2937 mechanism is used for domain, host, and address lists that are referenced by
2938 the "+name" syntax.
2939
2940 Arguments:
2941   anchorp     points to the tree anchor
2942   numberp     points to the current number for this tree
2943   max         the maximum number permitted
2944   s           the text of the option line, starting immediately after the name
2945                 of the list type
2946   tname       the name of the list type, for messages
2947
2948 Returns:      nothing
2949 */
2950
2951 static void
2952 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2953   uschar *tname)
2954 {
2955 BOOL forcecache = FALSE;
2956 uschar *ss;
2957 tree_node *t;
2958 namedlist_block *nb = store_get(sizeof(namedlist_block));
2959
2960 if (Ustrncmp(s, "_cache", 6) == 0)
2961   {
2962   forcecache = TRUE;
2963   s += 6;
2964   }
2965
2966 if (!isspace(*s))
2967   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2968
2969 if (*numberp >= max)
2970  log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2971    tname, max);
2972
2973 while (isspace(*s)) s++;
2974 ss = s;
2975 while (isalnum(*s) || *s == '_') s++;
2976 t = store_get(sizeof(tree_node) + s-ss);
2977 Ustrncpy(t->name, ss, s-ss);
2978 t->name[s-ss] = 0;
2979 while (isspace(*s)) s++;
2980
2981 if (!tree_insertnode(anchorp, t))
2982   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2983     "duplicate name \"%s\" for a named %s", t->name, tname);
2984
2985 t->data.ptr = nb;
2986 nb->number = *numberp;
2987 *numberp += 1;
2988
2989 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2990   "missing '=' after \"%s\"", t->name);
2991 while (isspace(*s)) s++;
2992 nb->string = read_string(s, t->name);
2993 nb->cache_data = NULL;
2994
2995 /* Check the string for any expansions; if any are found, mark this list
2996 uncacheable unless the user has explicited forced caching. */
2997
2998 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2999 }
3000
3001
3002
3003
3004 /*************************************************
3005 *        Unpick data for a rate limit            *
3006 *************************************************/
3007
3008 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3009 separate values.
3010
3011 Arguments:
3012   s            string, in the form t,b,f,l
3013                where t is the threshold (integer)
3014                b is the initial delay (time)
3015                f is the multiplicative factor (fixed point)
3016                k is the maximum time (time)
3017   threshold    where to store threshold
3018   base         where to store base in milliseconds
3019   factor       where to store factor in milliseconds
3020   limit        where to store limit
3021
3022 Returns:       nothing (panics on error)
3023 */
3024
3025 static void
3026 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3027   int *limit)
3028 {
3029 uschar bstring[16], lstring[16];
3030
3031 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3032     factor, lstring) == 4)
3033   {
3034   *base = readconf_readtime(bstring, 0, TRUE);
3035   *limit = readconf_readtime(lstring, 0, TRUE);
3036   if (*base >= 0 && *limit >= 0) return;
3037   }
3038 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3039 }
3040
3041
3042
3043
3044 /*************************************************
3045 *       Drop privs for checking TLS config      *
3046 *************************************************/
3047
3048 /* We want to validate TLS options during readconf, but do not want to be
3049 root when we call into the TLS library, in case of library linkage errors
3050 which cause segfaults; before this check, those were always done as the Exim
3051 runtime user and it makes sense to continue with that.
3052
3053 Assumes:  tls_require_ciphers has been set, if it will be
3054           exim_user has been set, if it will be
3055           exim_group has been set, if it will be
3056
3057 Returns:  bool for "okay"; false will cause caller to immediately exit.
3058 */
3059
3060 #ifdef SUPPORT_TLS
3061 static BOOL
3062 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3063 {
3064 const uschar *errmsg;
3065 pid_t pid;
3066 int rc, status;
3067 void (*oldsignal)(int);
3068
3069 /* If TLS will never be used, no point checking ciphers */
3070
3071 if (  !tls_advertise_hosts
3072    || !*tls_advertise_hosts
3073    || Ustrcmp(tls_advertise_hosts, ":") == 0
3074    )
3075   return TRUE;
3076 else if (!nowarn && !tls_certificate)
3077   log_write(0, LOG_MAIN,
3078     "Warning: No server certificate defined; will use a selfsigned one.\n"
3079     " Suggested action: either install a certificate or change tls_advertise_hosts option");
3080
3081 oldsignal = signal(SIGCHLD, SIG_DFL);
3082
3083 fflush(NULL);
3084 if ((pid = fork()) < 0)
3085   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3086
3087 if (pid == 0)
3088   {
3089   /* in some modes, will have dropped privilege already */
3090   if (!geteuid())
3091     exim_setugid(exim_uid, exim_gid, FALSE,
3092         US"calling tls_validate_require_cipher");
3093
3094   if ((errmsg = tls_validate_require_cipher()))
3095     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3096         "tls_require_ciphers invalid: %s", errmsg);
3097   fflush(NULL);
3098   _exit(0);
3099   }
3100
3101 do {
3102   rc = waitpid(pid, &status, 0);
3103 } while (rc < 0 && errno == EINTR);
3104
3105 DEBUG(D_tls)
3106   debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3107       (int)pid, status);
3108
3109 signal(SIGCHLD, oldsignal);
3110
3111 return status == 0;
3112 }
3113 #endif /* SUPPORT_TLS */
3114
3115
3116
3117
3118 /*************************************************
3119 *         Read main configuration options        *
3120 *************************************************/
3121
3122 /* This function is the first to be called for configuration reading. It
3123 opens the configuration file and reads general configuration settings until
3124 it reaches the end of the configuration section. The file is then left open so
3125 that the remaining configuration data can subsequently be read if needed for
3126 this run of Exim.
3127
3128 The configuration file must be owned either by root or exim, and be writeable
3129 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3130 in the config file, so the test is done on the compiled in values. A slight
3131 anomaly, to be carefully documented.
3132
3133 The name of the configuration file is taken from a list that is included in the
3134 binary of Exim. It can be altered from the command line, but if that is done,
3135 root privilege is immediately withdrawn unless the caller is root or exim.
3136 The first file on the list that exists is used.
3137
3138 For use on multiple systems that share file systems, first look for a
3139 configuration file whose name has the current node name on the end. If that is
3140 not found, try the generic name. For really contorted configurations, that run
3141 multiple Exims with different uid settings, first try adding the effective uid
3142 before the node name. These complications are going to waste resources on most
3143 systems. Therefore they are available only when requested by compile-time
3144 options. */
3145
3146 void
3147 readconf_main(BOOL nowarn)
3148 {
3149 int sep = 0;
3150 struct stat statbuf;
3151 uschar *s, *filename;
3152 const uschar *list = config_main_filelist;
3153
3154 /* Loop through the possible file names */
3155
3156 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3157   {
3158
3159   /* Cut out all the fancy processing unless specifically wanted */
3160
3161   #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3162   uschar *suffix = filename + Ustrlen(filename);
3163
3164   /* Try for the node-specific file if a node name exists */
3165
3166   #ifdef CONFIGURE_FILE_USE_NODE
3167   struct utsname uts;
3168   if (uname(&uts) >= 0)
3169     {
3170     #ifdef CONFIGURE_FILE_USE_EUID
3171     sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3172     config_file = Ufopen(filename, "rb");
3173     if (config_file == NULL)
3174     #endif  /* CONFIGURE_FILE_USE_EUID */
3175       {
3176       sprintf(CS suffix, ".%.256s", uts.nodename);
3177       config_file = Ufopen(filename, "rb");
3178       }
3179     }
3180   #endif  /* CONFIGURE_FILE_USE_NODE */
3181
3182   /* Otherwise, try the generic name, possibly with the euid added */
3183
3184   #ifdef CONFIGURE_FILE_USE_EUID
3185   if (config_file == NULL)
3186     {
3187     sprintf(CS suffix, ".%ld", (long int)original_euid);
3188     config_file = Ufopen(filename, "rb");
3189     }
3190   #endif  /* CONFIGURE_FILE_USE_EUID */
3191
3192   /* Finally, try the unadorned name */
3193
3194   if (config_file == NULL)
3195     {
3196     *suffix = 0;
3197     config_file = Ufopen(filename, "rb");
3198     }
3199   #else  /* if neither defined */
3200
3201   /* This is the common case when the fancy processing is not included. */
3202
3203   config_file = Ufopen(filename, "rb");
3204   #endif
3205
3206   /* If the file does not exist, continue to try any others. For any other
3207   error, break out (and die). */
3208
3209   if (config_file != NULL || errno != ENOENT) break;
3210   }
3211
3212 /* On success, save the name for verification; config_filename is used when
3213 logging configuration errors (it changes for .included files) whereas
3214 config_main_filename is the name shown by -bP. Failure to open a configuration
3215 file is a serious disaster. */
3216
3217 if (config_file)
3218   {
3219   uschar *last_slash = Ustrrchr(filename, '/');
3220   config_filename = config_main_filename = string_copy(filename);
3221
3222   /* The config_main_directory we need for the $config_dir expansion.
3223   config_main_filename we need for $config_file expansion.
3224   And config_dir is the directory of the current configuration, used for
3225   relative .includes. We do need to know it's name, as we change our working
3226   directory later. */
3227
3228   if (filename[0] == '/')
3229     config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3230   else
3231     {
3232       /* relative configuration file name: working dir + / + basename(filename) */
3233
3234       uschar buf[PATH_MAX];
3235       gstring * g;
3236
3237       if (os_getcwd(buf, PATH_MAX) == NULL)
3238         {
3239         perror("exim: getcwd");
3240         exit(EXIT_FAILURE);
3241         }
3242       g = string_cat(NULL, buf);
3243
3244       /* If the dir does not end with a "/", append one */
3245       if (g->s[g->ptr-1] != '/')
3246         g = string_catn(g, US"/", 1);
3247
3248       /* If the config file contains a "/", extract the directory part */
3249       if (last_slash)
3250         g = string_catn(g, filename, last_slash - filename);
3251
3252       config_main_directory = string_from_gstring(g);
3253     }
3254   config_directory = config_main_directory;
3255   }
3256 else
3257   {
3258   if (filename == NULL)
3259     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3260       "%s", config_main_filelist);
3261   else
3262     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3263       "configuration file %s", filename));
3264   }
3265
3266 /* Now, once we found and opened our configuration file, we change the directory
3267 to a safe place. Later we change to $spool_directory. */
3268
3269 if (Uchdir("/") < 0)
3270   {
3271   perror("exim: chdir `/': ");
3272   exit(EXIT_FAILURE);
3273   }
3274
3275 /* Check the status of the file we have opened, if we have retained root
3276 privileges and the file isn't /dev/null (which *should* be 0666). */
3277
3278 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3279   {
3280   if (fstat(fileno(config_file), &statbuf) != 0)
3281     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3282       big_buffer);
3283
3284   if ((statbuf.st_uid != root_uid                /* owner not root */
3285        #ifdef CONFIGURE_OWNER
3286        && statbuf.st_uid != config_uid           /* owner not the special one */
3287        #endif
3288          ) ||                                    /* or */
3289       (statbuf.st_gid != root_gid                /* group not root & */
3290        #ifdef CONFIGURE_GROUP
3291        && statbuf.st_gid != config_gid           /* group not the special one */
3292        #endif
3293        && (statbuf.st_mode & 020) != 0) ||       /* group writeable  */
3294                                                  /* or */
3295       ((statbuf.st_mode & 2) != 0))              /* world writeable  */
3296
3297     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3298       "wrong owner, group, or mode", big_buffer);
3299   }
3300
3301 /* Process the main configuration settings. They all begin with a lower case
3302 letter. If we see something starting with an upper case letter, it is taken as
3303 a macro definition. */
3304
3305 while ((s = get_config_line()))
3306   {
3307   if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3308     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3309       "found unexpected BOM (Byte Order Mark)");
3310
3311   if (isupper(s[0]))
3312     { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3313
3314   else if (Ustrncmp(s, "domainlist", 10) == 0)
3315     read_named_list(&domainlist_anchor, &domainlist_count,
3316       MAX_NAMED_LIST, s+10, US"domain list");
3317
3318   else if (Ustrncmp(s, "hostlist", 8) == 0)
3319     read_named_list(&hostlist_anchor, &hostlist_count,
3320       MAX_NAMED_LIST, s+8, US"host list");
3321
3322   else if (Ustrncmp(s, US"addresslist", 11) == 0)
3323     read_named_list(&addresslist_anchor, &addresslist_count,
3324       MAX_NAMED_LIST, s+11, US"address list");
3325
3326   else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3327     read_named_list(&localpartlist_anchor, &localpartlist_count,
3328       MAX_NAMED_LIST, s+13, US"local part list");
3329
3330   else
3331     (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3332       NULL, US"main option \"%s\" unknown");
3333   }
3334
3335
3336 /* If local_sender_retain is set, local_from_check must be unset. */
3337
3338 if (local_sender_retain && local_from_check)
3339   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3340     "local_sender_retain are set; this combination is not allowed");
3341
3342 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3343 wanted. */
3344
3345 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3346
3347 /* The max retry interval must not be greater than 24 hours. */
3348
3349 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3350
3351 /* remote_max_parallel must be > 0 */
3352
3353 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3354
3355 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3356 start of a new SMTP message. */
3357
3358 freeze_tell_config = freeze_tell;
3359
3360 /* The primary host name may be required for expansion of spool_directory
3361 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3362 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3363 canonize it. Some people like upper case letters in their host names, so we
3364 don't force the case. */
3365
3366 if (primary_hostname == NULL)
3367   {
3368   const uschar *hostname;
3369   struct utsname uts;
3370   if (uname(&uts) < 0)
3371     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3372   hostname = US uts.nodename;
3373
3374   if (Ustrchr(hostname, '.') == NULL)
3375     {
3376     int af = AF_INET;
3377     struct hostent *hostdata;
3378
3379     #if HAVE_IPV6
3380     if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3381          match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3382             MCL_DOMAIN, TRUE, NULL) != OK))
3383       af = AF_INET6;
3384     #else
3385     af = AF_INET;
3386     #endif
3387
3388     for (;;)
3389       {
3390       #if HAVE_IPV6
3391         #if HAVE_GETIPNODEBYNAME
3392         int error_num;
3393         hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3394         #else
3395         hostdata = gethostbyname2(CS hostname, af);
3396         #endif
3397       #else
3398       hostdata = gethostbyname(CS hostname);
3399       #endif
3400
3401       if (hostdata != NULL)
3402         {
3403         hostname = US hostdata->h_name;
3404         break;
3405         }
3406
3407       if (af == AF_INET) break;
3408       af = AF_INET;
3409       }
3410     }
3411
3412   primary_hostname = string_copy(hostname);
3413   }
3414
3415 /* Set up default value for smtp_active_hostname */
3416
3417 smtp_active_hostname = primary_hostname;
3418
3419 /* If spool_directory wasn't set in the build-time configuration, it must have
3420 got set above. Of course, writing to the log may not work if log_file_path is
3421 not set, but it will at least get to syslog or somewhere, with any luck. */
3422
3423 if (*spool_directory == 0)
3424   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3425     "proceed");
3426
3427 /* Expand the spool directory name; it may, for example, contain the primary
3428 host name. Same comment about failure. */
3429
3430 s = expand_string(spool_directory);
3431 if (s == NULL)
3432   log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3433     "\"%s\": %s", spool_directory, expand_string_message);
3434 spool_directory = s;
3435
3436 /* Expand log_file_path, which must contain "%s" in any component that isn't
3437 the null string or "syslog". It is also allowed to contain one instance of %D
3438 or %M. However, it must NOT contain % followed by anything else. */
3439
3440 if (*log_file_path != 0)
3441   {
3442   const uschar *ss, *sss;
3443   int sep = ':';                       /* Fixed for log file path */
3444   s = expand_string(log_file_path);
3445   if (s == NULL)
3446     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3447       "\"%s\": %s", log_file_path, expand_string_message);
3448
3449   ss = s;
3450   while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3451     {
3452     uschar *t;
3453     if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3454     t = Ustrstr(sss, "%s");
3455     if (t == NULL)
3456       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3457         "contain \"%%s\"", sss);
3458     *t = 'X';
3459     t = Ustrchr(sss, '%');
3460     if (t != NULL)
3461       {
3462       if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3463         log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3464           "unexpected \"%%\" character", s);
3465       }
3466     }
3467
3468   log_file_path = s;
3469   }
3470
3471 /* Interpret syslog_facility into an integer argument for 'ident' param to
3472 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3473 leading "log_". */
3474
3475 if (syslog_facility_str)
3476   {
3477   int i;
3478   uschar *s = syslog_facility_str;
3479
3480   if ((Ustrlen(syslog_facility_str) >= 4) &&
3481         (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3482     s += 4;
3483
3484   for (i = 0; i < syslog_list_size; i++)
3485     if (strcmpic(s, syslog_list[i].name) == 0)
3486       {
3487       syslog_facility = syslog_list[i].value;
3488       break;
3489       }
3490
3491   if (i >= syslog_list_size)
3492     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3493       "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3494   }
3495
3496 /* Expand pid_file_path */
3497
3498 if (*pid_file_path != 0)
3499   {
3500   if (!(s = expand_string(pid_file_path)))
3501     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3502       "\"%s\": %s", pid_file_path, expand_string_message);
3503   pid_file_path = s;
3504   }
3505
3506 /* Set default value of process_log_path */
3507
3508 if (!process_log_path || *process_log_path =='\0')
3509   process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3510
3511 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3512 message. */
3513
3514 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3515
3516 /* Unpick the SMTP rate limiting options, if set */
3517
3518 if (smtp_ratelimit_mail)
3519   unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3520     &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3521
3522 if (smtp_ratelimit_rcpt)
3523   unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3524     &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3525
3526 /* The qualify domains default to the primary host name */
3527
3528 if (!qualify_domain_sender)
3529   qualify_domain_sender = primary_hostname;
3530 if (!qualify_domain_recipient)
3531   qualify_domain_recipient = qualify_domain_sender;
3532
3533 /* Setting system_filter_user in the configuration sets the gid as well if a
3534 name is given, but a numerical value does not. */
3535
3536 if (system_filter_uid_set && !system_filter_gid_set)
3537   {
3538   struct passwd *pw = getpwuid(system_filter_uid);
3539   if (!pw)
3540     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3541       (long int)system_filter_uid);
3542   system_filter_gid = pw->pw_gid;
3543   system_filter_gid_set = TRUE;
3544   }
3545
3546 /* If the errors_reply_to field is set, check that it is syntactically valid
3547 and ensure it contains a domain. */
3548
3549 if (errors_reply_to)
3550   {
3551   uschar *errmess;
3552   int start, end, domain;
3553   uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3554     &start, &end, &domain, FALSE);
3555
3556   if (!recipient)
3557     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3558       "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3559
3560   if (domain == 0)
3561     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3562       "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3563   }
3564
3565 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3566 smtp_accept_max must also be set. */
3567
3568 if (smtp_accept_max == 0 &&
3569     (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3570   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3571     "smtp_accept_max must be set if smtp_accept_queue or "
3572     "smtp_accept_max_per_host is set");
3573
3574 /* Set up the host number if anything is specified. It is an expanded string
3575 so that it can be computed from the host name, for example. We do this last
3576 so as to ensure that everything else is set up before the expansion. */
3577
3578 if (host_number_string)
3579   {
3580   long int n;
3581   uschar *end;
3582   uschar *s = expand_string(host_number_string);
3583
3584   if (!s)
3585     log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3586         "failed to expand localhost_number \"%s\": %s",
3587         host_number_string, expand_string_message);
3588   n = Ustrtol(s, &end, 0);
3589   while (isspace(*end)) end++;
3590   if (*end != 0)
3591     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3592       "localhost_number value is not a number: %s", s);
3593   if (n > LOCALHOST_MAX)
3594     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3595       "localhost_number is greater than the maximum allowed value (%d)",
3596         LOCALHOST_MAX);
3597   host_number = n;
3598   }
3599
3600 #ifdef SUPPORT_TLS
3601 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3602
3603 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3604   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3605     "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3606     tls_verify_hosts ? "" : "try_");
3607
3608 /* This also checks that the library linkage is working and we can call
3609 routines in it, so call even if tls_require_ciphers is unset */
3610 if (!tls_dropprivs_validate_require_cipher(nowarn))
3611   exit(1);
3612
3613 /* Magic number: at time of writing, 1024 has been the long-standing value
3614 used by so many clients, and what Exim used to use always, that it makes
3615 sense to just min-clamp this max-clamp at that. */
3616 if (tls_dh_max_bits < 1024)
3617   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3618       "tls_dh_max_bits is too small, must be at least 1024 for interop");
3619
3620 /* If openssl_options is set, validate it */
3621 if (openssl_options)
3622   {
3623 # ifdef USE_GNUTLS
3624   log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3625     "openssl_options is set but we're using GnuTLS");
3626 # else
3627   long dummy;
3628   if (!tls_openssl_options_parse(openssl_options, &dummy))
3629     log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3630       "openssl_options parse error: %s", openssl_options);
3631 # endif
3632   }
3633 #endif  /*SUPPORT_TLS*/
3634
3635 if (!nowarn && !keep_environment && environ && *environ)
3636   log_write(0, LOG_MAIN,
3637       "Warning: purging the environment.\n"
3638       " Suggested action: use keep_environment.");
3639 }
3640
3641
3642
3643 /*************************************************
3644 *          Initialize one driver                 *
3645 *************************************************/
3646
3647 /* This is called once the driver's generic options, if any, have been read.
3648 We can now find the driver, set up defaults for the private options, and
3649 unset any "set" bits in the private options table (which might have been
3650 set by another incarnation of the same driver).
3651
3652 Arguments:
3653   d                   pointer to driver instance block, with generic
3654                         options filled in
3655   drivers_available   vector of available drivers
3656   size_of_info        size of each block in drivers_available
3657   class               class of driver, for error message
3658
3659 Returns:              pointer to the driver info block
3660 */
3661
3662 static driver_info *
3663 init_driver(driver_instance *d, driver_info *drivers_available,
3664   int size_of_info, uschar *class)
3665 {
3666 driver_info *dd;
3667
3668 for (dd = drivers_available; dd->driver_name[0] != 0;
3669      dd = (driver_info *)((US dd) + size_of_info))
3670   {
3671   if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3672     {
3673     int i;
3674     int len = dd->options_len;
3675     d->info = dd;
3676     d->options_block = store_get(len);
3677     memcpy(d->options_block, dd->options_block, len);
3678     for (i = 0; i < *(dd->options_count); i++)
3679       dd->options[i].type &= ~opt_set;
3680     return dd;
3681     }
3682   }
3683
3684 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3685   "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3686
3687 return NULL;   /* never obeyed */
3688 }
3689
3690
3691
3692
3693 /*************************************************
3694 *             Initialize driver list             *
3695 *************************************************/
3696
3697 /* This function is called for routers, transports, and authentication
3698 mechanisms. It reads the data from the current point in the configuration file
3699 up to the end of the section, and sets up a chain of instance blocks according
3700 to the file's contents. The file will already have been opened by a call to
3701 readconf_main, and must be left open for subsequent reading of further data.
3702
3703 Any errors cause a panic crash. Note that the blocks with names driver_info and
3704 driver_instance must map the first portions of all the _info and _instance
3705 blocks for this shared code to work.
3706
3707 Arguments:
3708   class                      "router", "transport", or "authenticator"
3709   anchor                     &routers, &transports, &auths
3710   drivers_available          available drivers
3711   size_of_info               size of each info block
3712   instance_default           points to default data for an instance
3713   instance_size              size of instance block
3714   driver_optionlist          generic option list
3715   driver_optionlist_count    count of generic option list
3716
3717 Returns:                     nothing
3718 */
3719
3720 void
3721 readconf_driver_init(
3722   uschar *class,
3723   driver_instance **anchor,
3724   driver_info *drivers_available,
3725   int size_of_info,
3726   void *instance_default,
3727   int  instance_size,
3728   optionlist *driver_optionlist,
3729   int  driver_optionlist_count)
3730 {
3731 driver_instance **p = anchor;
3732 driver_instance *d = NULL;
3733 uschar *buffer;
3734
3735 while ((buffer = get_config_line()) != NULL)
3736   {
3737   uschar name[64];
3738   uschar *s;
3739
3740   /* Read the first name on the line and test for the start of a new driver. A
3741   macro definition indicates the end of the previous driver. If this isn't the
3742   start of a new driver, the line will be re-read. */
3743
3744   s = readconf_readname(name, sizeof(name), buffer);
3745
3746   /* Handle macro definition, first finishing off the initialization of the
3747   previous driver, if any. */
3748
3749   if (isupper(*name) && *s == '=')
3750     {
3751     if (d)
3752       {
3753       if (!d->driver_name)
3754         log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3755           "no driver defined for %s \"%s\"", class, d->name);
3756       (d->info->init)(d);
3757       d = NULL;
3758       }
3759     if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3760     continue;
3761     }
3762
3763   /* If the line starts with a name terminated by a colon, we are at the
3764   start of the definition of a new driver. The rest of the line must be
3765   blank. */
3766
3767   if (*s++ == ':')
3768     {
3769     int i;
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 (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 optionlist *ol;
3873 uschar *ss;
3874
3875 for (ol = d->info->options; ol < d->info->options + count; ol++)
3876   {
3877   void *options_block;
3878   uschar *value;
3879   int type = ol->type & opt_mask;
3880   if (type != opt_stringptr) continue;
3881   options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3882   value = *(uschar **)(US options_block + (long int)(ol->value));
3883   if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3884     {
3885     if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3886       isalnum(ss[Ustrlen(s)])) continue;
3887     DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3888       d->name, ol->name, s);
3889     return TRUE;
3890     }
3891   }
3892
3893 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3894 return FALSE;
3895 }
3896
3897
3898
3899
3900 /*************************************************
3901 *      Decode an error type for retries          *
3902 *************************************************/
3903
3904 /* This function is global because it is also called from the main
3905 program when testing retry information. It decodes strings such as "quota_7d"
3906 into numerical error codes.
3907
3908 Arguments:
3909   pp           points to start of text
3910   p            points past end of text
3911   basic_errno  points to an int to receive the main error number
3912   more_errno   points to an int to receive the secondary error data
3913
3914 Returns:       NULL if decoded correctly; else points to error text
3915 */
3916
3917 uschar *
3918 readconf_retry_error(const uschar *pp, const uschar *p,
3919   int *basic_errno, int *more_errno)
3920 {
3921 int len;
3922 const uschar *q = pp;
3923 while (q < p && *q != '_') q++;
3924 len = q - pp;
3925
3926 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3927   {
3928   *basic_errno = ERRNO_EXIMQUOTA;
3929   if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3930       return US"bad time value";
3931   }
3932
3933 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3934   {
3935   *basic_errno = ECONNREFUSED;
3936   if (q != p)
3937     {
3938     if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3939     else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3940     else return US"A or MX expected after \"refused\"";
3941     }
3942   }
3943
3944 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3945   {
3946   *basic_errno = ETIMEDOUT;
3947   if (q != p)
3948     {
3949     int i;
3950     int xlen = p - q - 1;
3951     const uschar *x = q + 1;
3952
3953     static uschar *extras[] =
3954       { US"A", US"MX", US"connect", US"connect_A",  US"connect_MX" };
3955     static int values[] =
3956       { 'A',   'M',    RTEF_CTOUT,  RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3957
3958     for (i = 0; i < nelem(extras); i++)
3959       if (strncmpic(x, extras[i], xlen) == 0)
3960         {
3961         *more_errno = values[i];
3962         break;
3963         }
3964
3965     if (i >= nelem(extras))
3966       if (strncmpic(x, US"DNS", xlen) == 0)
3967         log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3968           "available in retry rules (it has never worked) - treated as "
3969           "\"timeout\"");
3970       else
3971         return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3972     }
3973   }
3974
3975 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3976          strncmpic(pp, US"rcpt_4", 6) == 0 ||
3977          strncmpic(pp, US"data_4", 6) == 0)
3978   {
3979   BOOL bad = FALSE;
3980   int x = 255;                           /* means "any 4xx code" */
3981   if (p != pp + 8) bad = TRUE; else
3982     {
3983     int a = pp[6], b = pp[7];
3984     if (isdigit(a))
3985       {
3986       x = (a - '0') * 10;
3987       if (isdigit(b)) x += b - '0';
3988       else if (b == 'x') x += 100;
3989       else bad = TRUE;
3990       }
3991     else if (a != 'x' || b != 'x') bad = TRUE;
3992     }
3993
3994   if (bad)
3995     return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3996       "x is literal and d is any digit", pp);
3997
3998   *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3999                  *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4000   *more_errno = x << 8;
4001   }
4002
4003 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4004          strncmpic(q+1, US"failed", p-q-1) == 0)
4005   *basic_errno = ERRNO_AUTHFAIL;
4006
4007 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4008   *basic_errno = ERRNO_SMTPCLOSED;
4009
4010 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4011   *basic_errno = ERRNO_TLSREQUIRED;
4012
4013 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4014   *basic_errno = ERRNO_UNKNOWNHOST;
4015
4016 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4017   return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4018
4019 return NULL;
4020 }
4021
4022
4023
4024
4025 /*************************************************
4026 *                Read retry information          *
4027 *************************************************/
4028
4029 /* Each line of retry information contains:
4030
4031 .  A domain name pattern or an address pattern;
4032
4033 .  An error name, possibly with additional data, or *;
4034
4035 .  An optional sequence of retry items, each consisting of an identifying
4036    letter, a cutoff time, and optional parameters.
4037
4038 All this is decoded and placed into a control block. */
4039
4040
4041 /* Subroutine to read an argument, preceded by a comma and terminated
4042 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4043 1 = fixed point number (returned *1000).
4044
4045 Arguments:
4046   paddr     pointer to pointer to current character; updated
4047   type      0 => read a time; 1 => read a fixed point number
4048
4049 Returns:    time in seconds or fixed point number * 1000
4050 */
4051
4052 static int
4053 retry_arg(const uschar **paddr, int type)
4054 {
4055 const uschar *p = *paddr;
4056 const uschar *pp;
4057
4058 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4059
4060 while (isspace(*p)) p++;
4061 pp = p;
4062 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4063
4064 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4065   log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4066
4067 *paddr = p;
4068 switch (type)
4069   {
4070   case 0: return readconf_readtime(pp, *p, FALSE);
4071   case 1: return readconf_readfixed(pp, *p);
4072   }
4073 return 0;    /* Keep picky compilers happy */
4074 }
4075
4076 /* The function proper */
4077
4078 void
4079 readconf_retries(void)
4080 {
4081 retry_config **chain = &retries;
4082 retry_config *next;
4083 const uschar *p;
4084
4085 while ((p = get_config_line()))
4086   {
4087   retry_rule **rchain;
4088   const uschar *pp;
4089   uschar *error;
4090
4091   next = store_get(sizeof(retry_config));
4092   next->next = NULL;
4093   *chain = next;
4094   chain = &(next->next);
4095   next->basic_errno = next->more_errno = 0;
4096   next->senders = NULL;
4097   next->rules = NULL;
4098   rchain = &(next->rules);
4099
4100   next->pattern = string_dequote(&p);
4101   while (isspace(*p)) p++;
4102   pp = p;
4103   while (mac_isgraph(*p)) p++;
4104   if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4105     "missing error type in retry rule");
4106
4107   /* Test error names for things we understand. */
4108
4109   if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4110        &next->more_errno)))
4111     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4112
4113   /* There may be an optional address list of senders to be used as another
4114   constraint on the rule. This was added later, so the syntax is a bit of a
4115   fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4116   an address list. */
4117
4118   while (isspace(*p)) p++;
4119   if (Ustrncmp(p, "senders", 7) == 0)
4120     {
4121     p += 7;
4122     while (isspace(*p)) p++;
4123     if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4124       "\"=\" expected after \"senders\" in retry rule");
4125     while (isspace(*p)) p++;
4126     next->senders = string_dequote(&p);
4127     }
4128
4129   /* Now the retry rules. Keep the maximum timeout encountered. */
4130
4131   while (isspace(*p)) p++;
4132
4133   while (*p != 0)
4134     {
4135     retry_rule *rule = store_get(sizeof(retry_rule));
4136     *rchain = rule;
4137     rchain = &(rule->next);
4138     rule->next = NULL;
4139     rule->rule = toupper(*p++);
4140     rule->timeout = retry_arg(&p, 0);
4141     if (rule->timeout > retry_maximum_timeout)
4142       retry_maximum_timeout = rule->timeout;
4143
4144     switch (rule->rule)
4145       {
4146       case 'F':   /* Fixed interval */
4147         rule->p1 = retry_arg(&p, 0);
4148         break;
4149
4150       case 'G':   /* Geometrically increasing intervals */
4151       case 'H':   /* Ditto, but with randomness */
4152         rule->p1 = retry_arg(&p, 0);
4153         rule->p2 = retry_arg(&p, 1);
4154         break;
4155
4156       default:
4157         log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4158         break;
4159       }
4160
4161     if (rule->timeout <= 0 || rule->p1 <= 0 ||
4162           (rule->rule != 'F' && rule->p2 < 1000))
4163       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4164         "bad parameters for retry rule");
4165
4166     while (isspace(*p)) p++;
4167     if (*p == ';')
4168       {
4169       p++;
4170       while (isspace(*p)) p++;
4171       }
4172     else if (*p != 0)
4173       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4174     }
4175   }
4176 }
4177
4178
4179
4180 /*************************************************
4181 *         Initialize authenticators              *
4182 *************************************************/
4183
4184 /* Read the authenticators section of the configuration file.
4185
4186 Arguments:   none
4187 Returns:     nothing
4188 */
4189
4190 static void
4191 auths_init(void)
4192 {
4193 auth_instance *au, *bu;
4194
4195 readconf_driver_init(US"authenticator",
4196   (driver_instance **)(&auths),      /* chain anchor */
4197   (driver_info *)auths_available,    /* available drivers */
4198   sizeof(auth_info),                 /* size of info block */
4199   &auth_defaults,                    /* default values for generic options */
4200   sizeof(auth_instance),             /* size of instance block */
4201   optionlist_auths,                  /* generic options */
4202   optionlist_auths_size);
4203
4204 for (au = auths; au; au = au->next)
4205   {
4206   if (!au->public_name)
4207     log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4208       "the %s authenticator", au->name);
4209
4210   for (bu = au->next; bu; bu = bu->next)
4211     if (strcmpic(au->public_name, bu->public_name) == 0)
4212       if ((au->client && bu->client) || (au->server && bu->server))
4213         log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4214           "(%s and %s) have the same public name (%s)",
4215           au->client ? US"client" : US"server", au->name, bu->name,
4216           au->public_name);
4217   }
4218 }
4219
4220
4221
4222
4223 /*************************************************
4224 *             Read ACL information               *
4225 *************************************************/
4226
4227 /* If this run of Exim is not doing something that involves receiving a
4228 message, we can just skip over the ACL information. No need to parse it.
4229
4230 First, we have a function for acl_read() to call back to get the next line. We
4231 need to remember the line we passed, because at the end it will contain the
4232 name of the next ACL. */
4233
4234 static uschar *acl_line;
4235
4236 static uschar *
4237 acl_callback(void)
4238 {
4239 acl_line = get_config_line();
4240 return acl_line;
4241 }
4242
4243
4244 /* Now the main function:
4245
4246 Arguments:    none
4247 Returns:      nothing
4248 */
4249
4250 static void
4251 readconf_acl(void)
4252 {
4253 uschar *p;
4254
4255 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4256 between ACLs. */
4257
4258 acl_line = get_config_line();
4259
4260 while(acl_line)
4261   {
4262   uschar name[64];
4263   tree_node *node;
4264   uschar *error;
4265
4266   p = readconf_readname(name, sizeof(name), acl_line);
4267   if (isupper(*name) && *p == '=')
4268     {
4269     if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4270     acl_line = get_config_line();
4271     continue;
4272     }
4273
4274   if (*p != ':' || name[0] == 0)
4275     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4276
4277   node = store_get(sizeof(tree_node) + Ustrlen(name));
4278   Ustrcpy(node->name, name);
4279   if (!tree_insertnode(&acl_anchor, node))
4280     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4281       "there are two ACLs called \"%s\"", name);
4282
4283   node->data.ptr = acl_read(acl_callback, &error);
4284
4285   if (node->data.ptr == NULL && error != NULL)
4286     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4287   }
4288 }
4289
4290
4291
4292 /*************************************************
4293 *     Read configuration for local_scan()        *
4294 *************************************************/
4295
4296 /* This function is called after "begin local_scan" is encountered in the
4297 configuration file. If the local_scan() function allows for configuration
4298 options, we can process them. Otherwise, we expire in a panic.
4299
4300 Arguments:  none
4301 Returns:    nothing
4302 */
4303
4304 static void
4305 local_scan_init(void)
4306 {
4307 #ifndef LOCAL_SCAN_HAS_OPTIONS
4308 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4309   "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4310 #else
4311
4312 uschar *p;
4313 while ((p = get_config_line()))
4314   {
4315   (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4316     NULL, US"local_scan option \"%s\" unknown");
4317   }
4318 #endif
4319 }
4320
4321
4322
4323 /*************************************************
4324 *     Read rest of configuration (after main)    *
4325 *************************************************/
4326
4327 /* This function reads the rest of the runtime configuration, after the main
4328 configuration. It is called only when actually needed. Each subsequent section
4329 of the configuration starts with a line of the form
4330
4331   begin name
4332
4333 where the name is "routers", "transports", etc. A section is terminated by
4334 hitting the next "begin" line, and the next name is left in next_section.
4335 Because it may confuse people as to whether the names are singular or plural,
4336 we add "s" if it's missing. There is always enough room in next_section for
4337 this. This function is basically just a switch.
4338
4339 Arguments:   none
4340 Returns:     nothing
4341 */
4342
4343 static uschar *section_list[] = {
4344   US"acls",
4345   US"authenticators",
4346   US"local_scans",
4347   US"retrys",
4348   US"rewrites",
4349   US"routers",
4350   US"transports"};
4351
4352 void
4353 readconf_rest(void)
4354 {
4355 int had = 0;
4356
4357 while(next_section[0] != 0)
4358   {
4359   int bit;
4360   int first = 0;
4361   int last = nelem(section_list);
4362   int mid = last/2;
4363   int n = Ustrlen(next_section);
4364
4365   if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4366
4367   for (;;)
4368     {
4369     int c = strcmpic(next_section, section_list[mid]);
4370     if (c == 0) break;
4371     if (c > 0) first = mid + 1; else last = mid;
4372     if (first >= last)
4373       log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4374         "\"%.*s\" is not a known configuration section name", n, next_section);
4375     mid = (last + first)/2;
4376     }
4377
4378   bit = 1 << mid;
4379   if (((had ^= bit) & bit) == 0)
4380     log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4381       "\"%.*s\" section is repeated in the configuration file", n,
4382         next_section);
4383
4384   switch(mid)
4385     {
4386     case 0: readconf_acl(); break;
4387     case 1: auths_init(); break;
4388     case 2: local_scan_init(); break;
4389     case 3: readconf_retries(); break;
4390     case 4: readconf_rewrites(); break;
4391     case 5: route_init(); break;
4392     case 6: transport_init(); break;
4393     }
4394   }
4395
4396 (void)fclose(config_file);
4397 }
4398
4399 /* Init the storage for the pre-parsed config lines */
4400 void
4401 readconf_save_config(const uschar *s)
4402 {
4403 save_config_line(string_sprintf("# Exim Configuration (%s)",
4404   running_in_test_harness ? US"X" : s));
4405 }
4406
4407 static void
4408 save_config_position(const uschar *file, int line)
4409 {
4410 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4411 }
4412
4413 /* Append a pre-parsed logical line to the config lines store,
4414 this operates on a global (static) list that holds all the pre-parsed
4415 config lines, we do no further processing here, output formatting and
4416 honouring of <hide> or macros will be done during output */
4417
4418 static void
4419 save_config_line(const uschar* line)
4420 {
4421 static config_line_item *current;
4422 config_line_item *next;
4423
4424 next = (config_line_item*) store_get(sizeof(config_line_item));
4425 next->line = string_copy(line);
4426 next->next = NULL;
4427
4428 if (!config_lines) config_lines = next;
4429 else current->next = next;
4430
4431 current = next;
4432 }
4433
4434 /* List the parsed config lines, care about nice formatting and
4435 hide the <hide> values unless we're the admin user */
4436 void
4437 print_config(BOOL admin, BOOL terse)
4438 {
4439 config_line_item *i;
4440 const int TS = terse ? 0 : 2;
4441 int indent = 0;
4442
4443 for (i = config_lines; i; i = i->next)
4444   {
4445   uschar *current;
4446   uschar *p;
4447
4448   /* skip over to the first non-space */
4449   for (current = i->line; *current && isspace(*current); ++current)
4450     ;
4451
4452   if (*current == '\0')
4453     continue;
4454
4455   /* Collapse runs of spaces. We stop this if we encounter one of the
4456    * following characters: "'$, as this may indicate careful formatting */
4457   for (p = current; *p; ++p)
4458     {
4459     uschar *next;
4460     if (!isspace(*p)) continue;
4461     if (*p != ' ') *p = ' ';
4462
4463     for (next = p; isspace(*next); ++next)
4464       ;
4465
4466     if (next - p > 1)
4467       memmove(p+1, next, Ustrlen(next)+1);
4468
4469     if (*next == '"' || *next == '\'' || *next == '$')
4470       break;
4471     }
4472
4473   /* # lines */
4474   if (current[0] == '#')
4475     puts(CCS current);
4476
4477   /* begin lines are left aligned */
4478   else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4479     {
4480     if (!terse) puts("");
4481     puts(CCS current);
4482     indent = TS;
4483     }
4484
4485   /* router/acl/transport block names */
4486   else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4487     {
4488     if (!terse) puts("");
4489     printf("%*s%s\n", TS, "", current);
4490     indent = 2 * TS;
4491     }
4492
4493   /* hidden lines (all MACROS or lines prefixed with "hide") */
4494   else if (  !admin
4495           && (  isupper(*current)
4496              || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4497              )
4498           )
4499     {
4500     if ((p = Ustrchr(current, '=')))
4501       {
4502       *p = '\0';
4503       printf("%*s%s= %s\n", indent, "", current, hidden);
4504       }
4505     /* e.g.: hide split_spool_directory */
4506     else
4507       printf("%*s\n", indent, hidden);
4508     }
4509
4510   else
4511     /* rest is public */
4512     printf("%*s%s\n", indent, "", current);
4513   }
4514 }
4515
4516 #endif  /*!MACRO_PREDEF*/
4517 /* vi: aw ai sw=2
4518 */
4519 /* End of readconf.c */