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[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #ifdef MACRO_PREDEF
15 # include "macro_predef.h"
16 #endif
17
18 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
19
20
21 static uschar * syslog_facility_str;
22 static void fn_smtp_receive_timeout(const uschar *, const uschar *, unsigned);
23
24 /*************************************************
25 * Main configuration options *
26 *************************************************/
27
28 /* The list of options that can be set in the main configuration file. This
29 must be in alphabetic order because it is searched by binary chop. */
30
31 static optionlist optionlist_config[] = {
32 { "*set_exim_group", opt_bool|opt_hidden, {&exim_gid_set} },
33 { "*set_exim_user", opt_bool|opt_hidden, {&exim_uid_set} },
34 { "*set_system_filter_group", opt_bool|opt_hidden, {&system_filter_gid_set} },
35 { "*set_system_filter_user", opt_bool|opt_hidden, {&system_filter_uid_set} },
36 { "accept_8bitmime", opt_bool, {&accept_8bitmime} },
37 { "acl_not_smtp", opt_stringptr, {&acl_not_smtp} },
38 #ifdef WITH_CONTENT_SCAN
39 { "acl_not_smtp_mime", opt_stringptr, {&acl_not_smtp_mime} },
40 #endif
41 { "acl_not_smtp_start", opt_stringptr, {&acl_not_smtp_start} },
42 { "acl_smtp_auth", opt_stringptr, {&acl_smtp_auth} },
43 { "acl_smtp_connect", opt_stringptr, {&acl_smtp_connect} },
44 { "acl_smtp_data", opt_stringptr, {&acl_smtp_data} },
45 #ifndef DISABLE_PRDR
46 { "acl_smtp_data_prdr", opt_stringptr, {&acl_smtp_data_prdr} },
47 #endif
48 #ifndef DISABLE_DKIM
49 { "acl_smtp_dkim", opt_stringptr, {&acl_smtp_dkim} },
50 #endif
51 { "acl_smtp_etrn", opt_stringptr, {&acl_smtp_etrn} },
52 { "acl_smtp_expn", opt_stringptr, {&acl_smtp_expn} },
53 { "acl_smtp_helo", opt_stringptr, {&acl_smtp_helo} },
54 { "acl_smtp_mail", opt_stringptr, {&acl_smtp_mail} },
55 { "acl_smtp_mailauth", opt_stringptr, {&acl_smtp_mailauth} },
56 #ifdef WITH_CONTENT_SCAN
57 { "acl_smtp_mime", opt_stringptr, {&acl_smtp_mime} },
58 #endif
59 { "acl_smtp_notquit", opt_stringptr, {&acl_smtp_notquit} },
60 { "acl_smtp_predata", opt_stringptr, {&acl_smtp_predata} },
61 { "acl_smtp_quit", opt_stringptr, {&acl_smtp_quit} },
62 { "acl_smtp_rcpt", opt_stringptr, {&acl_smtp_rcpt} },
63 #ifndef DISABLE_TLS
64 { "acl_smtp_starttls", opt_stringptr, {&acl_smtp_starttls} },
65 #endif
66 { "acl_smtp_vrfy", opt_stringptr, {&acl_smtp_vrfy} },
67 { "add_environment", opt_stringptr, {&add_environment} },
68 { "admin_groups", opt_gidlist, {&admin_groups} },
69 { "allow_domain_literals", opt_bool, {&allow_domain_literals} },
70 { "allow_mx_to_ip", opt_bool, {&allow_mx_to_ip} },
71 { "allow_utf8_domains", opt_bool, {&allow_utf8_domains} },
72 { "auth_advertise_hosts", opt_stringptr, {&auth_advertise_hosts} },
73 { "auto_thaw", opt_time, {&auto_thaw} },
74 #ifdef WITH_CONTENT_SCAN
75 { "av_scanner", opt_stringptr, {&av_scanner} },
76 #endif
77 { "bi_command", opt_stringptr, {&bi_command} },
78 #ifdef EXPERIMENTAL_BRIGHTMAIL
79 { "bmi_config_file", opt_stringptr, {&bmi_config_file} },
80 #endif
81 { "bounce_message_file", opt_stringptr, {&bounce_message_file} },
82 { "bounce_message_text", opt_stringptr, {&bounce_message_text} },
83 { "bounce_return_body", opt_bool, {&bounce_return_body} },
84 { "bounce_return_linesize_limit", opt_mkint, {&bounce_return_linesize_limit} },
85 { "bounce_return_message", opt_bool, {&bounce_return_message} },
86 { "bounce_return_size_limit", opt_mkint, {&bounce_return_size_limit} },
87 { "bounce_sender_authentication",opt_stringptr,{&bounce_sender_authentication} },
88 { "callout_domain_negative_expire", opt_time, {&callout_cache_domain_negative_expire} },
89 { "callout_domain_positive_expire", opt_time, {&callout_cache_domain_positive_expire} },
90 { "callout_negative_expire", opt_time, {&callout_cache_negative_expire} },
91 { "callout_positive_expire", opt_time, {&callout_cache_positive_expire} },
92 { "callout_random_local_part",opt_stringptr, {&callout_random_local_part} },
93 { "check_log_inodes", opt_int, {&check_log_inodes} },
94 { "check_log_space", opt_Kint, {&check_log_space} },
95 { "check_rfc2047_length", opt_bool, {&check_rfc2047_length} },
96 { "check_spool_inodes", opt_int, {&check_spool_inodes} },
97 { "check_spool_space", opt_Kint, {&check_spool_space} },
98 { "chunking_advertise_hosts", opt_stringptr, {&chunking_advertise_hosts} },
99 { "commandline_checks_require_admin", opt_bool,{&commandline_checks_require_admin} },
100 { "daemon_smtp_port", opt_stringptr|opt_hidden, {&daemon_smtp_port} },
101 { "daemon_smtp_ports", opt_stringptr, {&daemon_smtp_port} },
102 { "daemon_startup_retries", opt_int, {&daemon_startup_retries} },
103 { "daemon_startup_sleep", opt_time, {&daemon_startup_sleep} },
104 #ifdef EXPERIMENTAL_DCC
105 { "dcc_direct_add_header", opt_bool, {&dcc_direct_add_header} },
106 { "dccifd_address", opt_stringptr, {&dccifd_address} },
107 { "dccifd_options", opt_stringptr, {&dccifd_options} },
108 #endif
109 { "debug_store", opt_bool, {&debug_store} },
110 { "delay_warning", opt_timelist, {&delay_warning} },
111 { "delay_warning_condition", opt_stringptr, {&delay_warning_condition} },
112 { "deliver_drop_privilege", opt_bool, {&deliver_drop_privilege} },
113 { "deliver_queue_load_max", opt_fixed, {&deliver_queue_load_max} },
114 { "delivery_date_remove", opt_bool, {&delivery_date_remove} },
115 #ifdef ENABLE_DISABLE_FSYNC
116 { "disable_fsync", opt_bool, {&disable_fsync} },
117 #endif
118 { "disable_ipv6", opt_bool, {&disable_ipv6} },
119 #ifndef DISABLE_DKIM
120 { "dkim_verify_hashes", opt_stringptr, {&dkim_verify_hashes} },
121 { "dkim_verify_keytypes", opt_stringptr, {&dkim_verify_keytypes} },
122 { "dkim_verify_minimal", opt_bool, {&dkim_verify_minimal} },
123 { "dkim_verify_signers", opt_stringptr, {&dkim_verify_signers} },
124 #endif
125 #ifdef SUPPORT_DMARC
126 { "dmarc_forensic_sender", opt_stringptr, {&dmarc_forensic_sender} },
127 { "dmarc_history_file", opt_stringptr, {&dmarc_history_file} },
128 { "dmarc_tld_file", opt_stringptr, {&dmarc_tld_file} },
129 #endif
130 { "dns_again_means_nonexist", opt_stringptr, {&dns_again_means_nonexist} },
131 { "dns_check_names_pattern", opt_stringptr, {&check_dns_names_pattern} },
132 { "dns_cname_loops", opt_int, {&dns_cname_loops} },
133 { "dns_csa_search_limit", opt_int, {&dns_csa_search_limit} },
134 { "dns_csa_use_reverse", opt_bool, {&dns_csa_use_reverse} },
135 { "dns_dnssec_ok", opt_int, {&dns_dnssec_ok} },
136 { "dns_ipv4_lookup", opt_stringptr, {&dns_ipv4_lookup} },
137 { "dns_retrans", opt_time, {&dns_retrans} },
138 { "dns_retry", opt_int, {&dns_retry} },
139 { "dns_trust_aa", opt_stringptr, {&dns_trust_aa} },
140 { "dns_use_edns0", opt_int, {&dns_use_edns0} },
141 /* This option is now a no-op, retained for compatibility */
142 { "drop_cr", opt_bool, {&drop_cr} },
143 /*********************************************************/
144 { "dsn_advertise_hosts", opt_stringptr, {&dsn_advertise_hosts} },
145 { "dsn_from", opt_stringptr, {&dsn_from} },
146 { "envelope_to_remove", opt_bool, {&envelope_to_remove} },
147 { "errors_copy", opt_stringptr, {&errors_copy} },
148 { "errors_reply_to", opt_stringptr, {&errors_reply_to} },
149 #ifndef DISABLE_EVENT
150 { "event_action", opt_stringptr, {&event_action} },
151 #endif
152 { "exim_group", opt_gid, {&exim_gid} },
153 { "exim_path", opt_stringptr, {&exim_path} },
154 { "exim_user", opt_uid, {&exim_uid} },
155 { "exim_version", opt_stringptr, {&version_string} },
156 { "extra_local_interfaces", opt_stringptr, {&extra_local_interfaces} },
157 { "extract_addresses_remove_arguments", opt_bool, {&extract_addresses_remove_arguments} },
158 { "finduser_retries", opt_int, {&finduser_retries} },
159 { "freeze_tell", opt_stringptr, {&freeze_tell} },
160 { "gecos_name", opt_stringptr, {&gecos_name} },
161 { "gecos_pattern", opt_stringptr, {&gecos_pattern} },
162 #ifndef DISABLE_TLS
163 { "gnutls_allow_auto_pkcs11", opt_bool, {&gnutls_allow_auto_pkcs11} },
164 { "gnutls_compat_mode", opt_bool, {&gnutls_compat_mode} },
165 #endif
166 { "header_line_maxsize", opt_int, {&header_line_maxsize} },
167 { "header_maxsize", opt_int, {&header_maxsize} },
168 { "headers_charset", opt_stringptr, {&headers_charset} },
169 { "helo_accept_junk_hosts", opt_stringptr, {&helo_accept_junk_hosts} },
170 { "helo_allow_chars", opt_stringptr, {&helo_allow_chars} },
171 { "helo_lookup_domains", opt_stringptr, {&helo_lookup_domains} },
172 { "helo_try_verify_hosts", opt_stringptr, {&helo_try_verify_hosts} },
173 { "helo_verify_hosts", opt_stringptr, {&helo_verify_hosts} },
174 { "hold_domains", opt_stringptr, {&hold_domains} },
175 { "host_lookup", opt_stringptr, {&host_lookup} },
176 { "host_lookup_order", opt_stringptr, {&host_lookup_order} },
177 { "host_reject_connection", opt_stringptr, {&host_reject_connection} },
178 { "hosts_connection_nolog", opt_stringptr, {&hosts_connection_nolog} },
179 #ifdef SUPPORT_PROXY
180 { "hosts_proxy", opt_stringptr, {&hosts_proxy} },
181 #endif
182 { "hosts_treat_as_local", opt_stringptr, {&hosts_treat_as_local} },
183 #ifdef LOOKUP_IBASE
184 { "ibase_servers", opt_stringptr, {&ibase_servers} },
185 #endif
186 { "ignore_bounce_errors_after", opt_time, {&ignore_bounce_errors_after} },
187 { "ignore_fromline_hosts", opt_stringptr, {&ignore_fromline_hosts} },
188 { "ignore_fromline_local", opt_bool, {&ignore_fromline_local} },
189 { "keep_environment", opt_stringptr, {&keep_environment} },
190 { "keep_malformed", opt_time, {&keep_malformed} },
191 #ifdef LOOKUP_LDAP
192 { "ldap_ca_cert_dir", opt_stringptr, {&eldap_ca_cert_dir} },
193 { "ldap_ca_cert_file", opt_stringptr, {&eldap_ca_cert_file} },
194 { "ldap_cert_file", opt_stringptr, {&eldap_cert_file} },
195 { "ldap_cert_key", opt_stringptr, {&eldap_cert_key} },
196 { "ldap_cipher_suite", opt_stringptr, {&eldap_cipher_suite} },
197 { "ldap_default_servers", opt_stringptr, {&eldap_default_servers} },
198 { "ldap_require_cert", opt_stringptr, {&eldap_require_cert} },
199 { "ldap_start_tls", opt_bool, {&eldap_start_tls} },
200 { "ldap_version", opt_int, {&eldap_version} },
201 #endif
202 { "local_from_check", opt_bool, {&local_from_check} },
203 { "local_from_prefix", opt_stringptr, {&local_from_prefix} },
204 { "local_from_suffix", opt_stringptr, {&local_from_suffix} },
205 { "local_interfaces", opt_stringptr, {&local_interfaces} },
206 #ifdef HAVE_LOCAL_SCAN
207 { "local_scan_timeout", opt_time, {&local_scan_timeout} },
208 #endif
209 { "local_sender_retain", opt_bool, {&local_sender_retain} },
210 { "localhost_number", opt_stringptr, {&host_number_string} },
211 { "log_file_path", opt_stringptr, {&log_file_path} },
212 { "log_selector", opt_stringptr, {&log_selector_string} },
213 { "log_timezone", opt_bool, {&log_timezone} },
214 { "lookup_open_max", opt_int, {&lookup_open_max} },
215 { "max_username_length", opt_int, {&max_username_length} },
216 { "message_body_newlines", opt_bool, {&message_body_newlines} },
217 { "message_body_visible", opt_mkint, {&message_body_visible} },
218 { "message_id_header_domain", opt_stringptr, {&message_id_domain} },
219 { "message_id_header_text", opt_stringptr, {&message_id_text} },
220 { "message_logs", opt_bool, {&message_logs} },
221 { "message_size_limit", opt_stringptr, {&message_size_limit} },
222 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
223 { "move_frozen_messages", opt_bool, {&move_frozen_messages} },
224 #endif
225 { "mua_wrapper", opt_bool, {&mua_wrapper} },
226 #ifdef LOOKUP_MYSQL
227 { "mysql_servers", opt_stringptr, {&mysql_servers} },
228 #endif
229 { "never_users", opt_uidlist, {&never_users} },
230 { "notifier_socket", opt_stringptr, {&notifier_socket} },
231 #ifndef DISABLE_TLS
232 { "openssl_options", opt_stringptr, {&openssl_options} },
233 #endif
234 #ifdef LOOKUP_ORACLE
235 { "oracle_servers", opt_stringptr, {&oracle_servers} },
236 #endif
237 { "percent_hack_domains", opt_stringptr, {&percent_hack_domains} },
238 #ifdef EXIM_PERL
239 { "perl_at_start", opt_bool, {&opt_perl_at_start} },
240 { "perl_startup", opt_stringptr, {&opt_perl_startup} },
241 { "perl_taintmode", opt_bool, {&opt_perl_taintmode} },
242 #endif
243 #ifdef LOOKUP_PGSQL
244 { "pgsql_servers", opt_stringptr, {&pgsql_servers} },
245 #endif
246 { "pid_file_path", opt_stringptr, {&pid_file_path} },
247 { "pipelining_advertise_hosts", opt_stringptr, {&pipelining_advertise_hosts} },
248 #ifndef DISABLE_PIPE_CONNECT
249 { "pipelining_connect_advertise_hosts", opt_stringptr,
250 {&pipe_connect_advertise_hosts} },
251 #endif
252 #ifndef DISABLE_PRDR
253 { "prdr_enable", opt_bool, {&prdr_enable} },
254 #endif
255 { "preserve_message_logs", opt_bool, {&preserve_message_logs} },
256 { "primary_hostname", opt_stringptr, {&primary_hostname} },
257 { "print_topbitchars", opt_bool, {&print_topbitchars} },
258 { "process_log_path", opt_stringptr, {&process_log_path} },
259 { "prod_requires_admin", opt_bool, {&prod_requires_admin} },
260 { "qualify_domain", opt_stringptr, {&qualify_domain_sender} },
261 { "qualify_recipient", opt_stringptr, {&qualify_domain_recipient} },
262 { "queue_domains", opt_stringptr, {&queue_domains} },
263 #ifdef EXPERIMENTAL_QUEUE_RAMP
264 { "queue_fast_ramp", opt_bool, {&queue_fast_ramp} },
265 #endif
266 { "queue_list_requires_admin",opt_bool, {&queue_list_requires_admin} },
267 { "queue_only", opt_bool, {&queue_only} },
268 { "queue_only_file", opt_stringptr, {&queue_only_file} },
269 { "queue_only_load", opt_fixed, {&queue_only_load} },
270 { "queue_only_load_latch", opt_bool, {&queue_only_load_latch} },
271 { "queue_only_override", opt_bool, {&queue_only_override} },
272 { "queue_run_in_order", opt_bool, {&queue_run_in_order} },
273 { "queue_run_max", opt_stringptr, {&queue_run_max} },
274 { "queue_smtp_domains", opt_stringptr, {&queue_smtp_domains} },
275 { "receive_timeout", opt_time, {&receive_timeout} },
276 { "received_header_text", opt_stringptr, {&received_header_text} },
277 { "received_headers_max", opt_int, {&received_headers_max} },
278 { "recipient_unqualified_hosts", opt_stringptr, {&recipient_unqualified_hosts} },
279 { "recipients_max", opt_int, {&recipients_max} },
280 { "recipients_max_reject", opt_bool, {&recipients_max_reject} },
281 #ifdef LOOKUP_REDIS
282 { "redis_servers", opt_stringptr, {&redis_servers} },
283 #endif
284 { "remote_max_parallel", opt_int, {&remote_max_parallel} },
285 { "remote_sort_domains", opt_stringptr, {&remote_sort_domains} },
286 { "retry_data_expire", opt_time, {&retry_data_expire} },
287 { "retry_interval_max", opt_time, {&retry_interval_max} },
288 { "return_path_remove", opt_bool, {&return_path_remove} },
289 { "return_size_limit", opt_mkint|opt_hidden, {&bounce_return_size_limit} },
290 { "rfc1413_hosts", opt_stringptr, {&rfc1413_hosts} },
291 { "rfc1413_query_timeout", opt_time, {&rfc1413_query_timeout} },
292 { "sender_unqualified_hosts", opt_stringptr, {&sender_unqualified_hosts} },
293 { "slow_lookup_log", opt_int, {&slow_lookup_log} },
294 { "smtp_accept_keepalive", opt_bool, {&smtp_accept_keepalive} },
295 { "smtp_accept_max", opt_int, {&smtp_accept_max} },
296 { "smtp_accept_max_nonmail", opt_int, {&smtp_accept_max_nonmail} },
297 { "smtp_accept_max_nonmail_hosts", opt_stringptr, {&smtp_accept_max_nonmail_hosts} },
298 { "smtp_accept_max_per_connection", opt_int, {&smtp_accept_max_per_connection} },
299 { "smtp_accept_max_per_host", opt_stringptr, {&smtp_accept_max_per_host} },
300 { "smtp_accept_queue", opt_int, {&smtp_accept_queue} },
301 { "smtp_accept_queue_per_connection", opt_int, {&smtp_accept_queue_per_connection} },
302 { "smtp_accept_reserve", opt_int, {&smtp_accept_reserve} },
303 { "smtp_active_hostname", opt_stringptr, {&raw_active_hostname} },
304 { "smtp_banner", opt_stringptr, {&smtp_banner} },
305 { "smtp_check_spool_space", opt_bool, {&smtp_check_spool_space} },
306 { "smtp_connect_backlog", opt_int, {&smtp_connect_backlog} },
307 { "smtp_enforce_sync", opt_bool, {&smtp_enforce_sync} },
308 { "smtp_etrn_command", opt_stringptr, {&smtp_etrn_command} },
309 { "smtp_etrn_serialize", opt_bool, {&smtp_etrn_serialize} },
310 { "smtp_load_reserve", opt_fixed, {&smtp_load_reserve} },
311 { "smtp_max_synprot_errors", opt_int, {&smtp_max_synprot_errors} },
312 { "smtp_max_unknown_commands",opt_int, {&smtp_max_unknown_commands} },
313 { "smtp_ratelimit_hosts", opt_stringptr, {&smtp_ratelimit_hosts} },
314 { "smtp_ratelimit_mail", opt_stringptr, {&smtp_ratelimit_mail} },
315 { "smtp_ratelimit_rcpt", opt_stringptr, {&smtp_ratelimit_rcpt} },
316 { "smtp_receive_timeout", opt_func, {.fn = &fn_smtp_receive_timeout} },
317 { "smtp_reserve_hosts", opt_stringptr, {&smtp_reserve_hosts} },
318 { "smtp_return_error_details",opt_bool, {&smtp_return_error_details} },
319 #ifdef SUPPORT_I18N
320 { "smtputf8_advertise_hosts", opt_stringptr, {&smtputf8_advertise_hosts} },
321 #endif
322 #ifdef WITH_CONTENT_SCAN
323 { "spamd_address", opt_stringptr, {&spamd_address} },
324 #endif
325 #ifdef SUPPORT_SPF
326 { "spf_guess", opt_stringptr, {&spf_guess} },
327 #endif
328 { "split_spool_directory", opt_bool, {&split_spool_directory} },
329 { "spool_directory", opt_stringptr, {&spool_directory} },
330 { "spool_wireformat", opt_bool, {&spool_wireformat} },
331 #ifdef LOOKUP_SQLITE
332 { "sqlite_dbfile", opt_stringptr, {&sqlite_dbfile} },
333 { "sqlite_lock_timeout", opt_int, {&sqlite_lock_timeout} },
334 #endif
335 #ifdef EXPERIMENTAL_SRS
336 { "srs_config", opt_stringptr, {&srs_config} },
337 { "srs_hashlength", opt_int, {&srs_hashlength} },
338 { "srs_hashmin", opt_int, {&srs_hashmin} },
339 { "srs_maxage", opt_int, {&srs_maxage} },
340 { "srs_secrets", opt_stringptr, {&srs_secrets} },
341 { "srs_usehash", opt_bool, {&srs_usehash} },
342 { "srs_usetimestamp", opt_bool, {&srs_usetimestamp} },
343 #endif
344 { "strict_acl_vars", opt_bool, {&strict_acl_vars} },
345 { "strip_excess_angle_brackets", opt_bool, {&strip_excess_angle_brackets} },
346 { "strip_trailing_dot", opt_bool, {&strip_trailing_dot} },
347 { "syslog_duplication", opt_bool, {&syslog_duplication} },
348 { "syslog_facility", opt_stringptr, {&syslog_facility_str} },
349 { "syslog_pid", opt_bool, {&syslog_pid} },
350 { "syslog_processname", opt_stringptr, {&syslog_processname} },
351 { "syslog_timestamp", opt_bool, {&syslog_timestamp} },
352 { "system_filter", opt_stringptr, {&system_filter} },
353 { "system_filter_directory_transport", opt_stringptr,{&system_filter_directory_transport} },
354 { "system_filter_file_transport",opt_stringptr,{&system_filter_file_transport} },
355 { "system_filter_group", opt_gid, {&system_filter_gid} },
356 { "system_filter_pipe_transport",opt_stringptr,{&system_filter_pipe_transport} },
357 { "system_filter_reply_transport",opt_stringptr,{&system_filter_reply_transport} },
358 { "system_filter_user", opt_uid, {&system_filter_uid} },
359 { "tcp_nodelay", opt_bool, {&tcp_nodelay} },
360 #ifdef USE_TCP_WRAPPERS
361 { "tcp_wrappers_daemon_name", opt_stringptr, {&tcp_wrappers_daemon_name} },
362 #endif
363 { "timeout_frozen_after", opt_time, {&timeout_frozen_after} },
364 { "timezone", opt_stringptr, {&timezone_string} },
365 { "tls_advertise_hosts", opt_stringptr, {&tls_advertise_hosts} },
366 #ifndef DISABLE_TLS
367 { "tls_certificate", opt_stringptr, {&tls_certificate} },
368 { "tls_crl", opt_stringptr, {&tls_crl} },
369 { "tls_dh_max_bits", opt_int, {&tls_dh_max_bits} },
370 { "tls_dhparam", opt_stringptr, {&tls_dhparam} },
371 { "tls_eccurve", opt_stringptr, {&tls_eccurve} },
372 # ifndef DISABLE_OCSP
373 { "tls_ocsp_file", opt_stringptr, {&tls_ocsp_file} },
374 # endif
375 { "tls_on_connect_ports", opt_stringptr, {&tls_in.on_connect_ports} },
376 { "tls_privatekey", opt_stringptr, {&tls_privatekey} },
377 { "tls_remember_esmtp", opt_bool, {&tls_remember_esmtp} },
378 { "tls_require_ciphers", opt_stringptr, {&tls_require_ciphers} },
379 # ifdef EXPERIMENTAL_TLS_RESUME
380 { "tls_resumption_hosts", opt_stringptr, {&tls_resumption_hosts} },
381 # endif
382 { "tls_try_verify_hosts", opt_stringptr, {&tls_try_verify_hosts} },
383 { "tls_verify_certificates", opt_stringptr, {&tls_verify_certificates} },
384 { "tls_verify_hosts", opt_stringptr, {&tls_verify_hosts} },
385 #endif
386 { "trusted_groups", opt_gidlist, {&trusted_groups} },
387 { "trusted_users", opt_uidlist, {&trusted_users} },
388 { "unknown_login", opt_stringptr, {&unknown_login} },
389 { "unknown_username", opt_stringptr, {&unknown_username} },
390 { "untrusted_set_sender", opt_stringptr, {&untrusted_set_sender} },
391 { "uucp_from_pattern", opt_stringptr, {&uucp_from_pattern} },
392 { "uucp_from_sender", opt_stringptr, {&uucp_from_sender} },
393 { "warn_message_file", opt_stringptr, {&warn_message_file} },
394 { "write_rejectlog", opt_bool, {&write_rejectlog} }
395 };
396
397 #ifndef MACRO_PREDEF
398 static int optionlist_config_size = nelem(optionlist_config);
399 #endif
400
401
402 #ifdef MACRO_PREDEF
403
404 static void
405 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
406
407 void
408 options_main(void)
409 {
410 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
411 }
412
413 void
414 options_auths(void)
415 {
416 uschar buf[64];
417
418 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
419
420 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
421 {
422 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
423 builtin_macro_create(buf);
424 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
425
426 if (ai->macros_create) (ai->macros_create)();
427 }
428 }
429
430 void
431 options_logging(void)
432 {
433 uschar buf[64];
434
435 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
436 {
437 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
438 builtin_macro_create(buf);
439 }
440 }
441
442
443 #else /*!MACRO_PREDEF*/
444
445 extern char **environ;
446
447 static void save_config_line(const uschar* line);
448 static void save_config_position(const uschar *file, int line);
449 static void print_config(BOOL admin, BOOL terse);
450
451
452 #define CSTATE_STACK_SIZE 10
453
454 const uschar *config_directory = NULL;
455
456
457 /* Structure for chain (stack) of .included files */
458
459 typedef struct config_file_item {
460 struct config_file_item *next;
461 const uschar *filename;
462 const uschar *directory;
463 FILE *file;
464 int lineno;
465 } config_file_item;
466
467 /* Structure for chain of configuration lines (-bP config) */
468
469 typedef struct config_line_item {
470 struct config_line_item *next;
471 uschar *line;
472 } config_line_item;
473
474 static config_line_item* config_lines;
475
476 /* Structure of table of conditional words and their state transitions */
477
478 typedef struct cond_item {
479 uschar *name;
480 int namelen;
481 int action1;
482 int action2;
483 int pushpop;
484 } cond_item;
485
486 /* Structure of table of syslog facility names and values */
487
488 typedef struct syslog_fac_item {
489 uschar *name;
490 int value;
491 } syslog_fac_item;
492
493 /* constants */
494 static const uschar * const hidden = US"<value not displayable>";
495
496 /* Static variables */
497
498 static config_file_item *config_file_stack = NULL; /* For includes */
499
500 static uschar *syslog_facility_str = NULL;
501 static uschar next_section[24];
502 static uschar time_buffer[24];
503
504 /* State variables for conditional loading (.ifdef / .else / .endif) */
505
506 static int cstate = 0;
507 static int cstate_stack_ptr = -1;
508 static int cstate_stack[CSTATE_STACK_SIZE];
509
510 /* Table of state transitions for handling conditional inclusions. There are
511 four possible state transitions:
512
513 .ifdef true
514 .ifdef false
515 .elifdef true (or .else)
516 .elifdef false
517
518 .endif just causes the previous cstate to be popped off the stack */
519
520 static int next_cstate[3][4] =
521 {
522 /* State 0: reading from file, or reading until next .else or .endif */
523 { 0, 1, 2, 2 },
524 /* State 1: condition failed, skipping until next .else or .endif */
525 { 2, 2, 0, 1 },
526 /* State 2: skipping until .endif */
527 { 2, 2, 2, 2 },
528 };
529
530 /* Table of conditionals and the states to set. For each name, there are four
531 values: the length of the name (to save computing it each time), the state to
532 set if a macro was found in the line, the state to set if a macro was not found
533 in the line, and a stack manipulation setting which is:
534
535 -1 pull state value off the stack
536 0 don't alter the stack
537 +1 push value onto stack, before setting new state
538 */
539
540 static cond_item cond_list[] = {
541 { US"ifdef", 5, 0, 1, 1 },
542 { US"ifndef", 6, 1, 0, 1 },
543 { US"elifdef", 7, 2, 3, 0 },
544 { US"elifndef", 8, 3, 2, 0 },
545 { US"else", 4, 2, 2, 0 },
546 { US"endif", 5, 0, 0, -1 }
547 };
548
549 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
550
551 /* Table of syslog facility names and their values */
552
553 static syslog_fac_item syslog_list[] = {
554 { US"mail", LOG_MAIL },
555 { US"user", LOG_USER },
556 { US"news", LOG_NEWS },
557 { US"uucp", LOG_UUCP },
558 { US"local0", LOG_LOCAL0 },
559 { US"local1", LOG_LOCAL1 },
560 { US"local2", LOG_LOCAL2 },
561 { US"local3", LOG_LOCAL3 },
562 { US"local4", LOG_LOCAL4 },
563 { US"local5", LOG_LOCAL5 },
564 { US"local6", LOG_LOCAL6 },
565 { US"local7", LOG_LOCAL7 },
566 { US"daemon", LOG_DAEMON }
567 };
568
569 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
570
571
572 #define opt_fn_print BIT(0)
573 #define opt_fn_print_label BIT(1)
574
575
576 /*************************************************
577 * Find the name of an option *
578 *************************************************/
579
580 /* This function is to aid debugging. Various functions take arguments that are
581 pointer variables in the options table or in option tables for various drivers.
582 For debugging output, it is useful to be able to find the name of the option
583 which is currently being processed. This function finds it, if it exists, by
584 searching the table(s).
585
586 Arguments: a value that is presumed to be in the table above
587 Returns: the option name, or an empty string
588 */
589
590 uschar *
591 readconf_find_option(void *p)
592 {
593 for (int i = 0; i < nelem(optionlist_config); i++)
594 if (p == optionlist_config[i].v.value) return US optionlist_config[i].name;
595
596 for (router_instance * r = routers; r; r = r->next)
597 {
598 router_info *ri = r->info;
599 for (int i = 0; i < *ri->options_count; i++)
600 {
601 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
602 if (p == CS (r->options_block) + ri->options[i].v.offset)
603 return US ri->options[i].name;
604 }
605 }
606
607 for (transport_instance * t = transports; t; t = t->next)
608 {
609 transport_info *ti = t->info;
610 for (int i = 0; i < *ti->options_count; i++)
611 {
612 optionlist * op = &ti->options[i];
613 if ((op->type & opt_mask) != opt_stringptr) continue;
614 if (p == ( op->type & opt_public
615 ? CS t
616 : CS t->options_block
617 )
618 + op->v.offset)
619 return US op->name;
620 }
621 }
622
623 return US"";
624 }
625
626
627
628
629 /*************************************************
630 * Deal with an assignment to a macro *
631 *************************************************/
632
633 /* We have a new definition; append to the list.
634
635 Args:
636 name Name of the macro; will be copied
637 val Expansion result for the macro; will be copied
638 */
639
640 macro_item *
641 macro_create(const uschar * name, const uschar * val, BOOL command_line)
642 {
643 macro_item * m = store_get(sizeof(macro_item), FALSE);
644
645 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
646 m->next = NULL;
647 m->command_line = command_line;
648 m->namelen = Ustrlen(name);
649 m->replen = Ustrlen(val);
650 m->name = string_copy(name);
651 m->replacement = string_copy(val);
652 if (mlast)
653 mlast->next = m;
654 else
655 macros = m;
656 mlast = m;
657 if (!macros_user)
658 macros_user = m;
659 return m;
660 }
661
662
663 /* This function is called when a line that starts with an upper case letter is
664 encountered. The argument "line" should contain a complete logical line, and
665 start with the first letter of the macro name. The macro name and the
666 replacement text are extracted and stored. Redefinition of existing,
667 non-command line, macros is permitted using '==' instead of '='.
668
669 Arguments:
670 s points to the start of the logical line
671
672 Returns: FALSE iff fatal error
673 */
674
675 BOOL
676 macro_read_assignment(uschar *s)
677 {
678 uschar name[64];
679 int namelen = 0;
680 BOOL redef = FALSE;
681 macro_item *m;
682
683 while (isalnum(*s) || *s == '_')
684 {
685 if (namelen >= sizeof(name) - 1)
686 {
687 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
688 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
689 return FALSE;
690 }
691 name[namelen++] = *s++;
692 }
693 name[namelen] = 0;
694
695 while (isspace(*s)) s++;
696 if (*s++ != '=')
697 {
698 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
699 return FALSE;
700 }
701
702 if (*s == '=')
703 {
704 redef = TRUE;
705 s++;
706 }
707 while (isspace(*s)) s++;
708
709 /* If an existing macro of the same name was defined on the command line, we
710 just skip this definition. It's an error to attempt to redefine a macro without
711 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
712 It is also an error to define a macro whose name begins with the name of a
713 previously defined macro. This is the requirement that make using a tree
714 for macros hard; we must check all macros for the substring. Perhaps a
715 sorted list, and a bsearch, would work?
716 Note: it is documented that the other way round works. */
717
718 for (m = macros; m; m = m->next)
719 {
720 if (Ustrcmp(m->name, name) == 0)
721 {
722 if (!m->command_line && !redef)
723 {
724 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
725 "defined (use \"==\" if you want to redefine it)", name);
726 return FALSE;
727 }
728 break;
729 }
730
731 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
732 {
733 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
734 "a macro because previously defined macro \"%s\" is a substring",
735 name, m->name);
736 return FALSE;
737 }
738
739 /* We cannot have this test, because it is documented that a substring
740 macro is permitted (there is even an example).
741 *
742 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
743 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
744 * "a macro because it is a substring of previously defined macro \"%s\"",
745 * name, m->name);
746 */
747 }
748
749 /* Check for an overriding command-line definition. */
750
751 if (m && m->command_line) return TRUE;
752
753 /* Redefinition must refer to an existing macro. */
754
755 if (redef)
756 if (m)
757 {
758 m->replen = Ustrlen(s);
759 m->replacement = string_copy(s);
760 }
761 else
762 {
763 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
764 "\"%s\"", name);
765 return FALSE;
766 }
767
768 /* We have a new definition. */
769 else
770 (void) macro_create(name, s, FALSE);
771 return TRUE;
772 }
773
774
775
776
777
778 /* Process line for macros. The line is in big_buffer starting at offset len.
779 Expand big_buffer if needed. Handle definitions of new macros, and
780 macro expansions, rewriting the line in the buffer.
781
782 Arguments:
783 len Offset in buffer of start of line
784 newlen Pointer to offset of end of line, updated on return
785 macro_found Pointer to return that a macro was expanded
786
787 Return: pointer to first nonblank char in line
788 */
789
790 uschar *
791 macros_expand(int len, int * newlen, BOOL * macro_found)
792 {
793 uschar * ss = big_buffer + len;
794 uschar * s;
795
796 /* Find the true start of the physical line - leading spaces are always
797 ignored. */
798
799 while (isspace(*ss)) ss++;
800
801 /* Process the physical line for macros. If this is the start of the logical
802 line, skip over initial text at the start of the line if it starts with an
803 upper case character followed by a sequence of name characters and an equals
804 sign, because that is the definition of a new macro, and we don't do
805 replacement therein. */
806
807 s = ss;
808 if (len == 0 && isupper(*s))
809 {
810 while (isalnum(*s) || *s == '_') s++;
811 while (isspace(*s)) s++;
812 if (*s != '=') s = ss; /* Not a macro definition */
813 }
814
815 /* Skip leading chars which cannot start a macro name, to avoid multiple
816 pointless rescans in Ustrstr calls. */
817
818 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
819
820 /* For each defined macro, scan the line (from after XXX= if present),
821 replacing all occurrences of the macro. */
822
823 *macro_found = FALSE;
824 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
825 {
826 uschar * p, *pp;
827 uschar * t;
828
829 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
830 if (!*s) break;
831
832 t = s;
833 while ((p = Ustrstr(t, m->name)) != NULL)
834 {
835 int moveby;
836
837 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
838 m->name, (int) Ustrlen(ss)-1, ss);
839 /* Expand the buffer if necessary */
840
841 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
842 {
843 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
844 uschar *newbuffer = store_malloc(newsize);
845 memcpy(newbuffer, big_buffer, *newlen + 1);
846 p = newbuffer + (p - big_buffer);
847 s = newbuffer + (s - big_buffer);
848 ss = newbuffer + (ss - big_buffer);
849 t = newbuffer + (t - big_buffer);
850 big_buffer_size = newsize;
851 store_free(big_buffer);
852 big_buffer = newbuffer;
853 }
854
855 /* Shuffle the remaining characters up or down in the buffer before
856 copying in the replacement text. Don't rescan the replacement for this
857 same macro. */
858
859 pp = p + m->namelen;
860 if ((moveby = m->replen - m->namelen) != 0)
861 {
862 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
863 *newlen += moveby;
864 }
865 Ustrncpy(p, m->replacement, m->replen);
866 t = p + m->replen;
867 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
868 *macro_found = TRUE;
869 }
870 }
871
872 /* An empty macro replacement at the start of a line could mean that ss no
873 longer points to the first non-blank character. */
874
875 while (isspace(*ss)) ss++;
876 return ss;
877 }
878
879 /*************************************************
880 * Read configuration line *
881 *************************************************/
882
883 /* A logical line of text is read from the configuration file into the big
884 buffer, taking account of macros, .includes, and continuations. The size of
885 big_buffer is increased if necessary. The count of configuration lines is
886 maintained. Physical input lines starting with # (ignoring leading white space,
887 and after macro replacement) and empty logical lines are always ignored.
888 Leading and trailing spaces are removed.
889
890 If we hit a line of the form "begin xxxx", the xxxx is placed in the
891 next_section vector, and the function returns NULL, indicating the end of a
892 configuration section. On end-of-file, NULL is returned with next_section
893 empty.
894
895 Arguments: none
896
897 Returns: a pointer to the first non-blank in the line,
898 or NULL if eof or end of section is reached
899 */
900
901 static uschar *
902 get_config_line(void)
903 {
904 int startoffset = 0; /* To first non-blank char in logical line */
905 int len = 0; /* Of logical line so far */
906 int newlen;
907 uschar *s, *ss;
908 BOOL macro_found;
909
910 /* Loop for handling continuation lines, skipping comments, and dealing with
911 .include files. */
912
913 for (;;)
914 {
915 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
916 {
917 if (config_file_stack != NULL) /* EOF inside .include */
918 {
919 (void)fclose(config_file);
920 config_file = config_file_stack->file;
921 config_filename = config_file_stack->filename;
922 config_directory = config_file_stack->directory;
923 config_lineno = config_file_stack->lineno;
924 config_file_stack = config_file_stack->next;
925 if (config_lines)
926 save_config_position(config_filename, config_lineno);
927 continue;
928 }
929
930 /* EOF at top level */
931
932 if (cstate_stack_ptr >= 0)
933 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
934 "Unexpected end of configuration file: .endif missing");
935
936 if (len != 0) break; /* EOF after continuation */
937 next_section[0] = 0; /* EOF at start of logical line */
938 return NULL;
939 }
940
941 config_lineno++;
942 newlen = len + Ustrlen(big_buffer + len);
943
944 if (config_lines && config_lineno == 1)
945 save_config_position(config_filename, config_lineno);
946
947 /* Handle pathologically long physical lines - yes, it did happen - by
948 extending big_buffer at this point. The code also copes with very long
949 logical lines. */
950
951 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
952 {
953 uschar *newbuffer;
954 big_buffer_size += BIG_BUFFER_SIZE;
955 newbuffer = store_malloc(big_buffer_size);
956
957 /* This use of strcpy is OK because we know that the string in the old
958 buffer is shorter than the new buffer. */
959
960 Ustrcpy(newbuffer, big_buffer);
961 store_free(big_buffer);
962 big_buffer = newbuffer;
963 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
964 break;
965 newlen += Ustrlen(big_buffer + newlen);
966 }
967
968 ss = macros_expand(len, &newlen, &macro_found);
969
970 /* Check for comment lines - these are physical lines. */
971
972 if (*ss == '#') continue;
973
974 /* Handle conditionals, which are also applied to physical lines. Conditions
975 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
976 expansion occurred on the rest of the line. A preliminary test for the leading
977 '.' saves effort on most lines. */
978
979 if (*ss == '.')
980 {
981 int i;
982
983 /* Search the list of conditional directives */
984
985 for (i = 0; i < cond_list_size; i++)
986 {
987 int n;
988 cond_item *c = cond_list+i;
989 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
990
991 /* The following character must be white space or end of string */
992
993 n = ss[1 + c->namelen];
994 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
995
996 /* .ifdef and .ifndef push the current state onto the stack, then set
997 a new one from the table. Stack overflow is an error */
998
999 if (c->pushpop > 0)
1000 {
1001 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1002 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1003 ".%s nested too deeply", c->name);
1004 cstate_stack[++cstate_stack_ptr] = cstate;
1005 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1006 }
1007
1008 /* For any of the others, stack underflow is an error. The next state
1009 comes either from the stack (.endif) or from the table. */
1010
1011 else
1012 {
1013 if (cstate_stack_ptr < 0)
1014 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1015 ".%s without matching .ifdef", c->name);
1016 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1017 next_cstate[cstate][macro_found? c->action1 : c->action2];
1018 }
1019
1020 /* Having dealt with a directive, break the loop */
1021
1022 break;
1023 }
1024
1025 /* If we have handled a conditional directive, continue with the next
1026 physical line. Otherwise, fall through. */
1027
1028 if (i < cond_list_size) continue;
1029 }
1030
1031 /* If the conditional state is not 0 (actively using these lines), ignore
1032 this input line. */
1033
1034 if (cstate != 0) continue; /* Conditional skip */
1035
1036 /* Handle .include lines - these are also physical lines. */
1037
1038 if (Ustrncmp(ss, ".include", 8) == 0 &&
1039 (isspace(ss[8]) ||
1040 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1041 {
1042 uschar *t;
1043 int include_if_exists = isspace(ss[8])? 0 : 10;
1044 config_file_item *save;
1045 struct stat statbuf;
1046
1047 ss += 9 + include_if_exists;
1048 while (isspace(*ss)) ss++;
1049 t = ss + Ustrlen(ss);
1050 while (t > ss && isspace(t[-1])) t--;
1051 if (*ss == '\"' && t[-1] == '\"')
1052 {
1053 ss++;
1054 t--;
1055 }
1056 *t = 0;
1057
1058 /* We allow relative file names. For security reasons currently
1059 relative names not allowed with .include_if_exists. For .include_if_exists
1060 we need to check the permissions/ownership of the containing folder */
1061 if (*ss != '/')
1062 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1063 "absolute path \"%s\"", ss);
1064 else
1065 {
1066 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1067 ss = string_from_gstring(g);
1068 }
1069
1070 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1071
1072 if (config_lines)
1073 save_config_position(config_filename, config_lineno);
1074 save = store_get(sizeof(config_file_item), FALSE);
1075 save->next = config_file_stack;
1076 config_file_stack = save;
1077 save->file = config_file;
1078 save->filename = config_filename;
1079 save->directory = config_directory;
1080 save->lineno = config_lineno;
1081
1082 if (!(config_file = Ufopen(ss, "rb")))
1083 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1084 "configuration file %s", ss);
1085
1086 config_filename = string_copy(ss);
1087 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1088 config_lineno = 0;
1089 continue;
1090 }
1091
1092 /* If this is the start of the logical line, remember where the non-blank
1093 data starts. Otherwise shuffle down continuation lines to remove leading
1094 white space. */
1095
1096 if (len == 0)
1097 startoffset = ss - big_buffer;
1098 else
1099 {
1100 s = big_buffer + len;
1101 if (ss > s)
1102 {
1103 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1104 newlen -= ss - s;
1105 }
1106 }
1107
1108 /* Accept the new addition to the line. Remove trailing white space. */
1109
1110 len = newlen;
1111 while (len > 0 && isspace(big_buffer[len-1])) len--;
1112 big_buffer[len] = 0;
1113
1114 /* We are done if the line does not end in backslash and contains some data.
1115 Empty logical lines are ignored. For continuations, remove the backslash and
1116 go round the loop to read the continuation line. */
1117
1118 if (len > 0)
1119 {
1120 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1121 big_buffer[--len] = 0; /* Remove backslash */
1122 }
1123 } /* Loop for reading multiple physical lines */
1124
1125 /* We now have a logical line. Test for the end of a configuration section (or,
1126 more accurately, for the start of the next section). Place the name of the next
1127 section in next_section, and return NULL. If the name given is longer than
1128 next_section, truncate it. It will be unrecognized later, because all the known
1129 section names do fit. Leave space for pluralizing. */
1130
1131 s = big_buffer + startoffset; /* First non-space character */
1132
1133 if (config_lines)
1134 save_config_line(s);
1135
1136 if (strncmpic(s, US"begin ", 6) == 0)
1137 {
1138 s += 6;
1139 while (isspace(*s)) s++;
1140 if (big_buffer + len - s > sizeof(next_section) - 2)
1141 s[sizeof(next_section) - 2] = 0;
1142 Ustrcpy(next_section, s);
1143 return NULL;
1144 }
1145
1146 /* Return the first non-blank character. */
1147
1148 return s;
1149 }
1150
1151
1152
1153 /*************************************************
1154 * Read a name *
1155 *************************************************/
1156
1157 /* The yield is the pointer to the next uschar. Names longer than the
1158 output space are silently truncated. This function is also used from acl.c when
1159 parsing ACLs.
1160
1161 Arguments:
1162 name where to put the name
1163 len length of name
1164 s input pointer
1165
1166 Returns: new input pointer
1167 */
1168
1169 uschar *
1170 readconf_readname(uschar *name, int len, uschar *s)
1171 {
1172 int p = 0;
1173 while (isspace(*s)) s++;
1174 if (isalpha(*s))
1175 {
1176 while (isalnum(*s) || *s == '_')
1177 {
1178 if (p < len-1) name[p++] = *s;
1179 s++;
1180 }
1181 }
1182 name[p] = 0;
1183 while (isspace(*s)) s++;
1184 return s;
1185 }
1186
1187
1188
1189
1190 /*************************************************
1191 * Read a time value *
1192 *************************************************/
1193
1194 /* This function is also called from outside, to read argument
1195 time values. The format of a time value is:
1196
1197 [<n>w][<n>d][<n>h][<n>m][<n>s]
1198
1199 as long as at least one is present. If a format error is encountered,
1200 return a negative value. The value must be terminated by the given
1201 terminator.
1202
1203 Arguments:
1204 s input pointer
1205 terminator required terminating character
1206 return_msec if TRUE, allow fractional seconds and return milliseconds
1207
1208 Returns: the time value, or -1 on syntax error
1209 value is seconds if return_msec is FALSE
1210 value is milliseconds if return_msec is TRUE
1211 */
1212
1213 int
1214 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1215 {
1216 int yield = 0;
1217 for (;;)
1218 {
1219 int value, count;
1220 double fraction;
1221
1222 if (!isdigit(*s)) return -1;
1223 (void)sscanf(CCS s, "%d%n", &value, &count);
1224 s += count;
1225
1226 switch (*s)
1227 {
1228 case 'w': value *= 7;
1229 case 'd': value *= 24;
1230 case 'h': value *= 60;
1231 case 'm': value *= 60;
1232 case 's': s++;
1233 break;
1234
1235 case '.':
1236 if (!return_msec) return -1;
1237 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1238 s += count;
1239 if (*s++ != 's') return -1;
1240 yield += (int)(fraction * 1000.0);
1241 break;
1242
1243 default: return -1;
1244 }
1245
1246 if (return_msec) value *= 1000;
1247 yield += value;
1248 if (*s == terminator) return yield;
1249 }
1250 /* Control never reaches here. */
1251 }
1252
1253
1254
1255 /*************************************************
1256 * Read a fixed point value *
1257 *************************************************/
1258
1259 /* The value is returned *1000
1260
1261 Arguments:
1262 s input pointer
1263 terminator required terminator
1264
1265 Returns: the value, or -1 on error
1266 */
1267
1268 static int
1269 readconf_readfixed(const uschar *s, int terminator)
1270 {
1271 int yield = 0;
1272 int value, count;
1273 if (!isdigit(*s)) return -1;
1274 (void)sscanf(CS s, "%d%n", &value, &count);
1275 s += count;
1276 yield = value * 1000;
1277 if (*s == '.')
1278 {
1279 int m = 100;
1280 while (isdigit((*(++s))))
1281 {
1282 yield += (*s - '0') * m;
1283 m /= 10;
1284 }
1285 }
1286
1287 return (*s == terminator)? yield : (-1);
1288 }
1289
1290
1291
1292 /*************************************************
1293 * Find option in list *
1294 *************************************************/
1295
1296 /* The lists are always in order, so binary chop can be used.
1297
1298 Arguments:
1299 name the option name to search for
1300 ol the first entry in the option list
1301 last one more than the offset of the last entry in the option list
1302
1303 Returns: pointer to an option entry, or NULL if not found
1304 */
1305
1306 static optionlist *
1307 find_option(uschar *name, optionlist *ol, int last)
1308 {
1309 int first = 0;
1310 while (last > first)
1311 {
1312 int middle = (first + last)/2;
1313 int c = Ustrcmp(name, ol[middle].name);
1314
1315 if (c == 0) return ol + middle;
1316 else if (c > 0) first = middle + 1;
1317 else last = middle;
1318 }
1319 return NULL;
1320 }
1321
1322
1323
1324 /*************************************************
1325 * Find a set flag in option list *
1326 *************************************************/
1327
1328 /* Because some versions of Unix make no restrictions on the values of uids and
1329 gids (even negative ones), we cannot represent "unset" by a special value.
1330 There is therefore a separate boolean variable for each one indicating whether
1331 a value is set or not. This function returns a pointer to the boolean, given
1332 the original option name. It is a major disaster if the flag cannot be found.
1333
1334 Arguments:
1335 name the name of the uid or gid option
1336 oltop points to the start of the relevant option list
1337 last one more than the offset of the last item in the option list
1338 data_block NULL when reading main options => data values in the option
1339 list are absolute addresses; otherwise they are byte offsets
1340 in data_block (used for driver options)
1341
1342 Returns: a pointer to the boolean flag.
1343 */
1344
1345 static BOOL *
1346 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1347 {
1348 optionlist *ol;
1349 uschar name2[64];
1350 sprintf(CS name2, "*set_%.50s", name);
1351 if (!(ol = find_option(name2, oltop, last)))
1352 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1353 "Exim internal error: missing set flag for %s", name);
1354 return data_block
1355 ? (BOOL *)(US data_block + ol->v.offset) : (BOOL *)ol->v.value;
1356 }
1357
1358
1359
1360
1361 /*************************************************
1362 * Output extra characters message and die *
1363 *************************************************/
1364
1365 /* Called when an option line has junk on the end. Sometimes this is because
1366 the sysadmin thinks comments are permitted.
1367
1368 Arguments:
1369 s points to the extra characters
1370 t1..t3 strings to insert in the log message
1371
1372 Returns: doesn't return; dies
1373 */
1374
1375 static void
1376 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1377 {
1378 uschar *comment = US"";
1379 if (*s == '#') comment = US" (# is comment only at line start)";
1380 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1381 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1382 }
1383
1384
1385
1386 /*************************************************
1387 * Read rewrite information *
1388 *************************************************/
1389
1390 /* Each line of rewrite information contains:
1391
1392 . A complete address in the form user@domain, possibly with
1393 leading * for each part; or alternatively, a regex.
1394
1395 . A replacement string (which will be expanded).
1396
1397 . An optional sequence of one-letter flags, indicating which
1398 headers etc. to apply this rule to.
1399
1400 All this is decoded and placed into a control block. The OR of the flags is
1401 maintained in a common word.
1402
1403 Arguments:
1404 p points to the string that makes up the rule
1405 existflags points to the overall flag word
1406 isglobal TRUE if reading global rewrite rules
1407
1408 Returns: the control block for the parsed rule.
1409 */
1410
1411 static rewrite_rule *
1412 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1413 {
1414 rewrite_rule *next = store_get(sizeof(rewrite_rule), FALSE);
1415
1416 next->next = NULL;
1417 next->key = string_dequote(&p);
1418
1419 while (isspace(*p)) p++;
1420 if (*p == 0)
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1422 "missing rewrite replacement string");
1423
1424 next->flags = 0;
1425 next->replacement = string_dequote(&p);
1426
1427 while (*p != 0) switch (*p++)
1428 {
1429 case ' ': case '\t': break;
1430
1431 case 'q': next->flags |= rewrite_quit; break;
1432 case 'w': next->flags |= rewrite_whole; break;
1433
1434 case 'h': next->flags |= rewrite_all_headers; break;
1435 case 's': next->flags |= rewrite_sender; break;
1436 case 'f': next->flags |= rewrite_from; break;
1437 case 't': next->flags |= rewrite_to; break;
1438 case 'c': next->flags |= rewrite_cc; break;
1439 case 'b': next->flags |= rewrite_bcc; break;
1440 case 'r': next->flags |= rewrite_replyto; break;
1441
1442 case 'E': next->flags |= rewrite_all_envelope; break;
1443 case 'F': next->flags |= rewrite_envfrom; break;
1444 case 'T': next->flags |= rewrite_envto; break;
1445
1446 case 'Q': next->flags |= rewrite_qualify; break;
1447 case 'R': next->flags |= rewrite_repeat; break;
1448
1449 case 'S':
1450 next->flags |= rewrite_smtp;
1451 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1452 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1453 "rewrite rule has the S flag but is not a regular expression");
1454 break;
1455
1456 default:
1457 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1458 "unknown rewrite flag character '%c' "
1459 "(could be missing quotes round replacement item)", p[-1]);
1460 break;
1461 }
1462
1463 /* If no action flags are set, set all the "normal" rewrites. */
1464
1465 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1466 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1467
1468 /* Remember which exist, for optimization, and return the rule */
1469
1470 *existflags |= next->flags;
1471 return next;
1472 }
1473
1474
1475
1476
1477 /*************************************************
1478 * Read global rewrite information *
1479 *************************************************/
1480
1481 /* Each line is a single rewrite rule; it is parsed into a control block
1482 by readconf_one_rewrite(), and its flags are ORed into the global flag
1483 word rewrite_existflags. */
1484
1485 void
1486 readconf_rewrites(void)
1487 {
1488 rewrite_rule **chain = &global_rewrite_rules;
1489 uschar *p;
1490
1491 while ((p = get_config_line()) != NULL)
1492 {
1493 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1494 *chain = next;
1495 chain = &(next->next);
1496 }
1497 }
1498
1499
1500
1501 /*************************************************
1502 * Read a string *
1503 *************************************************/
1504
1505 /* Strings are read into the normal store pool. As long we aren't too
1506 near the end of the current block, the string will just use what is necessary
1507 on the top of the stacking pool, because string_cat() uses the extension
1508 mechanism.
1509
1510 Argument:
1511 s the rest of the input line
1512 name the option name (for errors)
1513
1514 Returns: pointer to the string
1515 */
1516
1517 static uschar *
1518 read_string(const uschar *s, const uschar *name)
1519 {
1520 uschar *yield;
1521 const uschar *ss;
1522
1523 if (*s != '\"') return string_copy(s);
1524
1525 ss = s;
1526 yield = string_dequote(&s);
1527
1528 if (s == ss+1 || s[-1] != '\"')
1529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1530 "missing quote at end of string value for %s", name);
1531
1532 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1533
1534 return yield;
1535 }
1536
1537
1538 /*************************************************
1539 * Custom-handler options *
1540 *************************************************/
1541 static void
1542 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1543 {
1544 if (flags & opt_fn_print)
1545 {
1546 if (flags & opt_fn_print_label) printf("%s = ", name);
1547 printf("%s\n", smtp_receive_timeout_s
1548 ? string_printing2(smtp_receive_timeout_s, FALSE)
1549 : readconf_printtime(smtp_receive_timeout));
1550 }
1551 else if (*str == '$')
1552 smtp_receive_timeout_s = string_copy(str);
1553 else
1554 {
1555 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1556 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1557 if (smtp_receive_timeout < 0)
1558 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1559 name);
1560 }
1561 }
1562
1563 /*************************************************
1564 * Handle option line *
1565 *************************************************/
1566
1567 /* This function is called from several places to process a line containing the
1568 setting of an option. The first argument is the line to be decoded; it has been
1569 checked not to be empty and not to start with '#'. Trailing newlines and white
1570 space have been removed. The second argument is a pointer to the list of
1571 variable names that are to be recognized, together with their types and
1572 locations, and the third argument gives the number of entries in the list.
1573
1574 The fourth argument is a pointer to a data block. If it is NULL, then the data
1575 values in the options list are absolute addresses. Otherwise, they are byte
1576 offsets in the data block.
1577
1578 String option data may continue onto several lines; this function reads further
1579 data from config_file if necessary.
1580
1581 The yield of this function is normally zero. If a string continues onto
1582 multiple lines, then the data value is permitted to be followed by a comma
1583 or a semicolon (for use in drivers) and the yield is that character.
1584
1585 Arguments:
1586 buffer contains the configuration line to be handled
1587 oltop points to the start of the relevant option list
1588 last one more than the offset of the last item in the option list
1589 data_block NULL when reading main options => data values in the option
1590 list are absolute addresses; otherwise they are byte offsets
1591 in data_block when they have opt_public set; otherwise
1592 they are byte offsets in data_block->options_block.
1593 unknown_txt format string to use in panic message for unknown option;
1594 must contain %s for option name
1595 if given as NULL, don't panic on unknown option
1596
1597 Returns: TRUE if an option was read successfully,
1598 FALSE false for an unknown option if unknown_txt == NULL,
1599 otherwise panic and die on an unknown option
1600 */
1601
1602 static BOOL
1603 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1604 void *data_block, uschar *unknown_txt)
1605 {
1606 int ptr = 0;
1607 int offset = 0;
1608 int count, type, value;
1609 int issecure = 0;
1610 uid_t uid;
1611 gid_t gid;
1612 BOOL boolvalue = TRUE;
1613 BOOL freesptr = TRUE;
1614 optionlist *ol, *ol2;
1615 struct passwd *pw;
1616 rmark reset_point;
1617 int intbase = 0;
1618 uschar *inttype = US"";
1619 uschar *sptr;
1620 uschar *s = buffer;
1621 uschar **str_target;
1622 uschar name[64];
1623 uschar name2[64];
1624
1625 /* There may be leading spaces; thereafter, we expect an option name starting
1626 with a letter. */
1627
1628 while (isspace(*s)) s++;
1629 if (!isalpha(*s))
1630 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1631
1632 /* Read the name of the option, and skip any subsequent white space. If
1633 it turns out that what we read was "hide", set the flag indicating that
1634 this is a secure option, and loop to read the next word. */
1635
1636 for (int n = 0; n < 2; n++)
1637 {
1638 while (isalnum(*s) || *s == '_')
1639 {
1640 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1641 s++;
1642 }
1643 name[ptr] = 0;
1644 while (isspace(*s)) s++;
1645 if (Ustrcmp(name, "hide") != 0) break;
1646 issecure = opt_secure;
1647 ptr = 0;
1648 }
1649
1650 /* Deal with "no_" or "not_" here for booleans */
1651
1652 if (Ustrncmp(name, "no_", 3) == 0)
1653 {
1654 boolvalue = FALSE;
1655 offset = 3;
1656 }
1657
1658 if (Ustrncmp(name, "not_", 4) == 0)
1659 {
1660 boolvalue = FALSE;
1661 offset = 4;
1662 }
1663
1664 /* Search the list for the given name. A non-existent name, or an option that
1665 is set twice, is a disaster. */
1666
1667 if (!(ol = find_option(name + offset, oltop, last)))
1668 {
1669 if (!unknown_txt) return FALSE;
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1671 }
1672
1673 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1674 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1675 "\"%s\" option set for the second time", name);
1676
1677 ol->type |= opt_set | issecure;
1678 type = ol->type & opt_mask;
1679
1680 /* Types with data values must be followed by '='; the "no[t]_" prefix
1681 applies only to boolean values. */
1682
1683 if (type < opt_bool || type > opt_bool_last)
1684 {
1685 if (offset != 0)
1686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1687 "negation prefix applied to a non-boolean option");
1688 if (!*s)
1689 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1690 "unexpected end of line (data missing) after %s", name);
1691 if (*s != '=')
1692 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1693 }
1694
1695 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1696 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1697 ultimately expands to one of those values. */
1698
1699 else if (*s && (offset != 0 || *s != '='))
1700 extra_chars_error(s, US"boolean option ", name, US"");
1701
1702 /* Skip white space after = */
1703
1704 if (*s == '=') while (isspace((*(++s))));
1705
1706 /* If there is a data block and the opt_public flag is not set, change
1707 the data block pointer to the private options block. */
1708
1709 if (data_block && !(ol->type & opt_public))
1710 data_block = (void *)(((driver_instance *)data_block)->options_block);
1711
1712 /* Now get the data according to the type. */
1713
1714 switch (type)
1715 {
1716 /* If a string value is not enclosed in quotes, it consists of
1717 the rest of the current line, verbatim. Otherwise, string escapes
1718 are processed.
1719
1720 A transport is specified as a string, which is then looked up in the
1721 list of transports. A search type is specified as one of a number of
1722 known strings.
1723
1724 A set or rewrite rules for a driver is specified as a string, which is
1725 then parsed into a suitable chain of control blocks.
1726
1727 Uids and gids are specified as strings which are then looked up in the
1728 passwd file. Lists of uids and gids are similarly specified as colon-
1729 separated strings. */
1730
1731 case opt_stringptr:
1732 case opt_uid:
1733 case opt_gid:
1734 case opt_expand_uid:
1735 case opt_expand_gid:
1736 case opt_uidlist:
1737 case opt_gidlist:
1738 case opt_rewrite:
1739
1740 reset_point = store_mark();
1741 sptr = read_string(s, name);
1742
1743 /* Having read a string, we now have several different ways of using it,
1744 depending on the data type, so do another switch. If keeping the actual
1745 string is not required (because it is interpreted), freesptr is set TRUE,
1746 and at the end we reset the pool. */
1747
1748 switch (type)
1749 {
1750 /* If this was a string, set the variable to point to the new string,
1751 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1752 rules, we still keep the string (for printing), and parse the rules into a
1753 control block and flags word. */
1754
1755 case opt_stringptr:
1756 str_target = data_block ? USS (US data_block + ol->v.offset)
1757 : USS ol->v.value;
1758 if (ol->type & opt_rep_con)
1759 {
1760 uschar * saved_condition;
1761 /* We already have a condition, we're conducting a crude hack to let
1762 multiple condition rules be chained together, despite storing them in
1763 text form. */
1764 *str_target = string_copy_perm( (saved_condition = *str_target)
1765 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1766 saved_condition, sptr)
1767 : sptr,
1768 FALSE);
1769 /* TODO(pdp): there is a memory leak here and just below
1770 when we set 3 or more conditions; I still don't
1771 understand the store mechanism enough to know
1772 what's the safe way to free content from an earlier store.
1773 AFAICT, stores stack, so freeing an early stored item also stores
1774 all data alloc'd after it. If we knew conditions were adjacent,
1775 we could survive that, but we don't. So I *think* we need to take
1776 another bit from opt_type to indicate "malloced"; this seems like
1777 quite a hack, especially for this one case. It also means that
1778 we can't ever reclaim the store from the *first* condition.
1779
1780 Because we only do this once, near process start-up, I'm prepared to
1781 let this slide for the time being, even though it rankles. */
1782 }
1783 else if (ol->type & opt_rep_str)
1784 {
1785 uschar sep_o =
1786 Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
1787 : Ustrncmp(name, "set", 3) == 0 ? ';'
1788 : ':';
1789 int sep_i = -(int)sep_o;
1790 const uschar * list = sptr;
1791 uschar * s;
1792 gstring * list_o = NULL;
1793
1794 if (*str_target)
1795 {
1796 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1797 list_o = string_cat(list_o, *str_target);
1798 }
1799
1800 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1801 list_o = string_append_listele(list_o, sep_o, s);
1802
1803 if (list_o)
1804 *str_target = string_copy_perm(string_from_gstring(list_o), FALSE);
1805 }
1806 else
1807 {
1808 *str_target = sptr;
1809 freesptr = FALSE;
1810 }
1811 break;
1812
1813 case opt_rewrite:
1814 if (data_block)
1815 *USS (US data_block + ol->v.offset) = sptr;
1816 else
1817 *USS ol->v.value = sptr;
1818 freesptr = FALSE;
1819 if (type == opt_rewrite)
1820 {
1821 int sep = 0;
1822 int *flagptr;
1823 uschar *p = sptr;
1824 rewrite_rule **chain;
1825 optionlist *ol3;
1826
1827 sprintf(CS name2, "*%.50s_rules", name);
1828 ol2 = find_option(name2, oltop, last);
1829 sprintf(CS name2, "*%.50s_flags", name);
1830 ol3 = find_option(name2, oltop, last);
1831
1832 if (!ol2 || !ol3)
1833 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1834 "rewrite rules not available for driver");
1835
1836 if (data_block)
1837 {
1838 chain = (rewrite_rule **)(US data_block + ol2->v.offset);
1839 flagptr = (int *)(US data_block + ol3->v.offset);
1840 }
1841 else
1842 {
1843 chain = (rewrite_rule **)ol2->v.value;
1844 flagptr = (int *)ol3->v.value;
1845 }
1846
1847 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1848 {
1849 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1850 *chain = next;
1851 chain = &(next->next);
1852 }
1853
1854 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1855 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1856 "non-header rewrite - not allowed at transport time -");
1857 }
1858 break;
1859
1860 /* If it was an expanded uid, see if there is any expansion to be
1861 done by checking for the presence of a $ character. If there is, save it
1862 in the corresponding *expand_user option field. Otherwise, fall through
1863 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1864 of data. */
1865
1866 case opt_expand_uid:
1867 sprintf(CS name2, "*expand_%.50s", name);
1868 if ((ol2 = find_option(name2, oltop, last)))
1869 {
1870 uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;
1871
1872 if (data_block)
1873 *(USS(US data_block + ol2->v.offset)) = ss;
1874 else
1875 *(USS ol2->v.value) = ss;
1876
1877 if (ss)
1878 {
1879 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1880 freesptr = FALSE;
1881 break;
1882 }
1883 }
1884
1885 /* Look up a fixed uid, and also make use of the corresponding gid
1886 if a passwd entry is returned and the gid has not been set. */
1887
1888 case opt_uid:
1889 if (!route_finduser(sptr, &pw, &uid))
1890 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1891 if (data_block)
1892 *(uid_t *)(US data_block + ol->v.offset) = uid;
1893 else
1894 *(uid_t *)ol->v.value = uid;
1895
1896 /* Set the flag indicating a fixed value is set */
1897
1898 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1899
1900 /* Handle matching gid if we have a passwd entry: done by finding the
1901 same name with terminating "user" changed to "group"; if not found,
1902 ignore. Also ignore if the value is already set. */
1903
1904 if (pw == NULL) break;
1905 Ustrcpy(name+Ustrlen(name)-4, US"group");
1906 ol2 = find_option(name, oltop, last);
1907 if (ol2 && ((ol2->type & opt_mask) == opt_gid ||
1908 (ol2->type & opt_mask) == opt_expand_gid))
1909 {
1910 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1911 if (!*set_flag)
1912 {
1913 if (data_block)
1914 *((gid_t *)(US data_block + ol2->v.offset)) = pw->pw_gid;
1915 else
1916 *((gid_t *)ol2->v.value) = pw->pw_gid;
1917 *set_flag = TRUE;
1918 }
1919 }
1920 break;
1921
1922 /* If it was an expanded gid, see if there is any expansion to be
1923 done by checking for the presence of a $ character. If there is, save it
1924 in the corresponding *expand_user option field. Otherwise, fall through
1925 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1926 of data. */
1927
1928 case opt_expand_gid:
1929 sprintf(CS name2, "*expand_%.50s", name);
1930 if ((ol2 = find_option(name2, oltop, last)))
1931 {
1932 uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;
1933
1934 if (data_block)
1935 *(USS(US data_block + ol2->v.offset)) = ss;
1936 else
1937 *(USS ol2->v.value) = ss;
1938
1939 if (ss)
1940 {
1941 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1942 freesptr = FALSE;
1943 break;
1944 }
1945 }
1946
1947 /* Handle freestanding gid */
1948
1949 case opt_gid:
1950 if (!route_findgroup(sptr, &gid))
1951 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1952 if (data_block)
1953 *((gid_t *)(US data_block + ol->v.offset)) = gid;
1954 else
1955 *((gid_t *)ol->v.value) = gid;
1956 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1957 break;
1958
1959 /* If it was a uid list, look up each individual entry, and build
1960 a vector of uids, with a count in the first element. Put the vector
1961 in malloc store so we can free the string. (We are reading into
1962 permanent store already.) */
1963
1964 case opt_uidlist:
1965 {
1966 int count = 1;
1967 uid_t *list;
1968 int ptr = 0;
1969 const uschar *p;
1970 const uschar *op = expand_string (sptr);
1971
1972 if (op == NULL)
1973 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1974 name, expand_string_message);
1975
1976 p = op;
1977 if (*p != 0) count++;
1978 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1979 list = store_malloc(count*sizeof(uid_t));
1980 list[ptr++] = (uid_t)(count - 1);
1981
1982 if (data_block)
1983 *((uid_t **)(US data_block + ol->v.offset)) = list;
1984 else
1985 *((uid_t **)ol->v.value) = list;
1986
1987 p = op;
1988 while (count-- > 1)
1989 {
1990 int sep = 0;
1991 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1992 if (!route_finduser(big_buffer, NULL, &uid))
1993 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1994 big_buffer);
1995 list[ptr++] = uid;
1996 }
1997 }
1998 break;
1999
2000 /* If it was a gid list, look up each individual entry, and build
2001 a vector of gids, with a count in the first element. Put the vector
2002 in malloc store so we can free the string. (We are reading into permanent
2003 store already.) */
2004
2005 case opt_gidlist:
2006 {
2007 int count = 1;
2008 gid_t *list;
2009 int ptr = 0;
2010 const uschar *p;
2011 const uschar *op = expand_string (sptr);
2012
2013 if (!op)
2014 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2015 name, expand_string_message);
2016
2017 p = op;
2018 if (*p != 0) count++;
2019 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2020 list = store_malloc(count*sizeof(gid_t));
2021 list[ptr++] = (gid_t)(count - 1);
2022
2023 if (data_block)
2024 *((gid_t **)(US data_block + ol->v.offset)) = list;
2025 else
2026 *((gid_t **)ol->v.value) = list;
2027
2028 p = op;
2029 while (count-- > 1)
2030 {
2031 int sep = 0;
2032 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2033 if (!route_findgroup(big_buffer, &gid))
2034 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2035 big_buffer);
2036 list[ptr++] = gid;
2037 }
2038 }
2039 break;
2040 }
2041
2042 /* Release store if the value of the string doesn't need to be kept. */
2043
2044 if (freesptr) reset_point = store_reset(reset_point);
2045 break;
2046
2047 /* Expanded boolean: if no characters follow, or if there are no dollar
2048 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2049 save the string for later expansion in the alternate place. */
2050
2051 case opt_expand_bool:
2052 if (*s && Ustrchr(s, '$') != 0)
2053 {
2054 sprintf(CS name2, "*expand_%.50s", name);
2055 if ((ol2 = find_option(name2, oltop, last)))
2056 {
2057 reset_point = store_mark();
2058 sptr = read_string(s, name);
2059 if (data_block)
2060 *(USS(US data_block + ol2->v.offset)) = sptr;
2061 else
2062 *(USS ol2->v.value) = sptr;
2063 freesptr = FALSE;
2064 break;
2065 }
2066 }
2067 /* Fall through */
2068
2069 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2070 look for yes/not/true/false. Some booleans are stored in a single bit in
2071 a single int. There's a special fudge for verify settings; without a suffix
2072 they set both xx_sender and xx_recipient. The table points to the sender
2073 value; search subsequently for the recipient. There's another special case:
2074 opt_bool_set also notes when a boolean has been set. */
2075
2076 case opt_bool:
2077 case opt_bit:
2078 case opt_bool_verify:
2079 case opt_bool_set:
2080 if (*s != 0)
2081 {
2082 s = readconf_readname(name2, 64, s);
2083 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2084 boolvalue = TRUE;
2085 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2086 boolvalue = FALSE;
2087 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2088 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2089 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2090 US"for boolean option ", name);
2091 }
2092
2093 /* Handle single-bit type. */
2094
2095 if (type == opt_bit)
2096 {
2097 int bit = 1 << ((ol->type >> 16) & 31);
2098 int * ptr = data_block
2099 ? (int *)(US data_block + ol->v.offset)
2100 : (int *)ol->v.value;
2101 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2102 break;
2103 }
2104
2105 /* Handle full BOOL types */
2106
2107 if (data_block)
2108 *((BOOL *)(US data_block + ol->v.offset)) = boolvalue;
2109 else
2110 *((BOOL *)ol->v.value) = boolvalue;
2111
2112 /* Verify fudge */
2113
2114 if (type == opt_bool_verify)
2115 {
2116 sprintf(CS name2, "%.50s_recipient", name + offset);
2117 if ((ol2 = find_option(name2, oltop, last)))
2118 if (data_block)
2119 *((BOOL *)(US data_block + ol2->v.offset)) = boolvalue;
2120 else
2121 *((BOOL *)ol2->v.value) = boolvalue;
2122 }
2123
2124 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2125
2126 else if (type == opt_bool_set)
2127 {
2128 sprintf(CS name2, "*set_%.50s", name + offset);
2129 if ((ol2 = find_option(name2, oltop, last)))
2130 if (data_block)
2131 *((BOOL *)(US data_block + ol2->v.offset)) = TRUE;
2132 else
2133 *((BOOL *)ol2->v.value) = TRUE;
2134 }
2135 break;
2136
2137 /* Octal integer */
2138
2139 case opt_octint:
2140 intbase = 8;
2141 inttype = US"octal ";
2142
2143 /* Integer: a simple(ish) case; allow octal and hex formats, and
2144 suffixes K, M, G, and T. The different types affect output, not input. */
2145
2146 case opt_mkint:
2147 case opt_int:
2148 {
2149 uschar *endptr;
2150 long int lvalue;
2151
2152 errno = 0;
2153 lvalue = strtol(CS s, CSS &endptr, intbase);
2154
2155 if (endptr == s)
2156 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2157 inttype, name);
2158
2159 if (errno != ERANGE && *endptr)
2160 {
2161 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2162
2163 if ((mp = Ustrchr(mp, *endptr)))
2164 {
2165 endptr++;
2166 do
2167 {
2168 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2169 {
2170 errno = ERANGE;
2171 break;
2172 }
2173 lvalue *= 1024;
2174 }
2175 while (*(mp += 2));
2176 }
2177 }
2178
2179 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2180 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2181 "absolute value of integer \"%s\" is too large (overflow)", s);
2182
2183 while (isspace(*endptr)) endptr++;
2184 if (*endptr)
2185 extra_chars_error(endptr, inttype, US"integer value for ", name);
2186
2187 value = (int)lvalue;
2188 }
2189
2190 if (data_block)
2191 *(int *)(US data_block + ol->v.offset) = value;
2192 else
2193 *(int *)ol->v.value = value;
2194 break;
2195
2196 /* Integer held in K: again, allow formats and suffixes as above. */
2197
2198 case opt_Kint:
2199 {
2200 uschar *endptr;
2201 errno = 0;
2202 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2203
2204 if (endptr == s)
2205 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2206 inttype, name);
2207
2208 if (errno != ERANGE && *endptr)
2209 {
2210 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2211
2212 if ((mp = Ustrchr(mp, *endptr)))
2213 {
2214 endptr++;
2215 while (*(mp += 2))
2216 {
2217 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2218 {
2219 errno = ERANGE;
2220 break;
2221 }
2222 lvalue *= 1024;
2223 }
2224 }
2225 else
2226 lvalue = (lvalue + 512)/1024;
2227 }
2228
2229 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2230 "absolute value of integer \"%s\" is too large (overflow)", s);
2231
2232 while (isspace(*endptr)) endptr++;
2233 if (*endptr != 0)
2234 extra_chars_error(endptr, inttype, US"integer value for ", name);
2235
2236 if (data_block)
2237 *(int_eximarith_t *)(US data_block + ol->v.offset) = lvalue;
2238 else
2239 *(int_eximarith_t *)ol->v.value = lvalue;
2240 break;
2241 }
2242
2243 /* Fixed-point number: held to 3 decimal places. */
2244
2245 case opt_fixed:
2246 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2247 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2248 "fixed-point number expected for %s", name);
2249
2250 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2251 "integer \"%s\" is too large (overflow)", s);
2252
2253 value *= 1000;
2254
2255 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2256 "integer \"%s\" is too large (overflow)", s);
2257
2258 /* We get a coverity error here for using count, as it derived
2259 from the tainted buffer pointed to by s, as parsed by sscanf().
2260 By the definition of sscanf we must be accessing between start
2261 and end of s (assuming it is nul-terminated...) so ignore the error. */
2262 /* coverity[tainted_data] */
2263 if (s[count] == '.')
2264 {
2265 int d = 100;
2266 while (isdigit(s[++count]))
2267 {
2268 value += (s[count] - '0') * d;
2269 d /= 10;
2270 }
2271 }
2272
2273 while (isspace(s[count])) count++;
2274
2275 if (s[count] != 0)
2276 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2277
2278 if (data_block)
2279 *((int *)(US data_block + ol->v.offset)) = value;
2280 else
2281 *((int *)ol->v.value) = value;
2282 break;
2283
2284 /* There's a special routine to read time values. */
2285
2286 case opt_time:
2287 value = readconf_readtime(s, 0, FALSE);
2288 if (value < 0)
2289 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2290 name);
2291 if (data_block)
2292 *((int *)(US data_block + ol->v.offset)) = value;
2293 else
2294 *((int *)ol->v.value) = value;
2295 break;
2296
2297 /* A time list is a list of colon-separated times, with the first
2298 element holding the size of the list and the second the number of
2299 entries used. */
2300
2301 case opt_timelist:
2302 {
2303 int count = 0;
2304 int * list = data_block
2305 ? (int *)(US data_block + ol->v.offset)
2306 : (int *)ol->v.value;
2307
2308 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2309 {
2310 int terminator = 0;
2311 uschar *snext = Ustrchr(s, ':');
2312 if (snext != NULL)
2313 {
2314 uschar *ss = snext;
2315 while (ss > s && isspace(ss[-1])) ss--;
2316 terminator = *ss;
2317 }
2318 value = readconf_readtime(s, terminator, FALSE);
2319 if (value < 0)
2320 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2321 name);
2322 if (count > 1 && value <= list[count])
2323 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2324 "time value out of order for %s", name);
2325 list[count+1] = value;
2326 if (snext == NULL) break;
2327 s = snext + 1;
2328 while (isspace(*s)) s++;
2329 }
2330
2331 if (count > list[0] - 2)
2332 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2333 name);
2334 if (count > 0 && list[2] == 0) count = 0;
2335 list[1] = count;
2336 break;
2337 }
2338
2339 case opt_func:
2340 {
2341 void (*fn)() = ol->v.fn;
2342 fn(name, s, 0);
2343 break;
2344 }
2345 }
2346
2347 return TRUE;
2348 }
2349
2350
2351
2352 /*************************************************
2353 * Print a time value *
2354 *************************************************/
2355
2356 /*
2357 Argument: a time value in seconds
2358 Returns: pointer to a fixed buffer containing the time as a string,
2359 in readconf_readtime() format
2360 */
2361
2362 uschar *
2363 readconf_printtime(int t)
2364 {
2365 int s, m, h, d, w;
2366 uschar *p = time_buffer;
2367
2368 if (t < 0)
2369 {
2370 *p++ = '-';
2371 t = -t;
2372 }
2373
2374 s = t % 60;
2375 t /= 60;
2376 m = t % 60;
2377 t /= 60;
2378 h = t % 24;
2379 t /= 24;
2380 d = t % 7;
2381 w = t/7;
2382
2383 if (w > 0) p += sprintf(CS p, "%dw", w);
2384 if (d > 0) p += sprintf(CS p, "%dd", d);
2385 if (h > 0) p += sprintf(CS p, "%dh", h);
2386 if (m > 0) p += sprintf(CS p, "%dm", m);
2387 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2388
2389 return time_buffer;
2390 }
2391
2392
2393
2394 /*************************************************
2395 * Print an individual option value *
2396 *************************************************/
2397
2398 /* This is used by the -bP option, so prints to the standard output.
2399 The entire options list is passed in as an argument, because some options come
2400 in pairs - typically uid/gid settings, which can either be explicit numerical
2401 values, or strings to be expanded later. If the numerical value is unset,
2402 search for "*expand_<name>" to see if there is a string equivalent.
2403
2404 Arguments:
2405 ol option entry, or NULL for an unknown option
2406 name option name
2407 options_block NULL for main configuration options; otherwise points to
2408 a driver block; if the option doesn't have opt_public
2409 set, then options_block->options_block is where the item
2410 resides.
2411 oltop points to the option list in which ol exists
2412 last one more than the offset of the last entry in optop
2413 no_labels do not show "foo = " at the start.
2414
2415 Returns: boolean success
2416 */
2417
2418 static BOOL
2419 print_ol(optionlist *ol, uschar *name, void *options_block,
2420 optionlist *oltop, int last, BOOL no_labels)
2421 {
2422 struct passwd *pw;
2423 struct group *gr;
2424 optionlist *ol2;
2425 void *value;
2426 uid_t *uidlist;
2427 gid_t *gidlist;
2428 uschar *s;
2429 uschar name2[64];
2430
2431 if (!ol)
2432 {
2433 printf("%s is not a known option\n", name);
2434 return FALSE;
2435 }
2436
2437 /* Non-admin callers cannot see options that have been flagged secure by the
2438 "hide" prefix. */
2439
2440 if (!f.admin_user && ol->type & opt_secure)
2441 {
2442 if (no_labels)
2443 printf("%s\n", CCS hidden);
2444 else
2445 printf("%s = %s\n", name, CCS hidden);
2446 return TRUE;
2447 }
2448
2449 /* Else show the value of the option */
2450
2451 value = ol->v.value;
2452 if (options_block)
2453 {
2454 if (!(ol->type & opt_public))
2455 options_block = (void *)(((driver_instance *)options_block)->options_block);
2456 value = (void *)(US options_block + (long int)value);
2457 }
2458
2459 switch(ol->type & opt_mask)
2460 {
2461 case opt_stringptr:
2462 case opt_rewrite: /* Show the text value */
2463 s = *(USS value);
2464 if (!no_labels) printf("%s = ", name);
2465 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2466 break;
2467
2468 case opt_int:
2469 if (!no_labels) printf("%s = ", name);
2470 printf("%d\n", *((int *)value));
2471 break;
2472
2473 case opt_mkint:
2474 {
2475 int x = *((int *)value);
2476 if (x != 0 && (x & 1023) == 0)
2477 {
2478 int c = 'K';
2479 x >>= 10;
2480 if ((x & 1023) == 0)
2481 {
2482 c = 'M';
2483 x >>= 10;
2484 }
2485 if (!no_labels) printf("%s = ", name);
2486 printf("%d%c\n", x, c);
2487 }
2488 else
2489 {
2490 if (!no_labels) printf("%s = ", name);
2491 printf("%d\n", x);
2492 }
2493 }
2494 break;
2495
2496 case opt_Kint:
2497 {
2498 int_eximarith_t x = *((int_eximarith_t *)value);
2499 if (!no_labels) printf("%s = ", name);
2500 if (x == 0) printf("0\n");
2501 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2502 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2503 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2504 else printf(PR_EXIM_ARITH "K\n", x);
2505 }
2506 break;
2507
2508 case opt_octint:
2509 if (!no_labels) printf("%s = ", name);
2510 printf("%#o\n", *((int *)value));
2511 break;
2512
2513 /* Can be negative only when "unset", in which case integer */
2514
2515 case opt_fixed:
2516 {
2517 int x = *((int *)value);
2518 int f = x % 1000;
2519 int d = 100;
2520 if (x < 0) printf("%s =\n", name); else
2521 {
2522 if (!no_labels) printf("%s = ", name);
2523 printf("%d.", x/1000);
2524 do
2525 {
2526 printf("%d", f/d);
2527 f %= d;
2528 d /= 10;
2529 }
2530 while (f != 0);
2531 printf("\n");
2532 }
2533 }
2534 break;
2535
2536 /* If the numerical value is unset, try for the string value */
2537
2538 case opt_expand_uid:
2539 if (! *get_set_flag(name, oltop, last, options_block))
2540 {
2541 sprintf(CS name2, "*expand_%.50s", name);
2542 if ((ol2 = find_option(name2, oltop, last)))
2543 {
2544 if (options_block)
2545 s = *USS (US options_block + ol2->v.offset);
2546 else
2547 s = *USS ol2->v.value;
2548 if (!no_labels) printf("%s = ", name);
2549 printf("%s\n", s ? string_printing(s) : US"");
2550 break;
2551 }
2552 }
2553
2554 /* Else fall through */
2555
2556 case opt_uid:
2557 if (!no_labels) printf("%s = ", name);
2558 if (! *get_set_flag(name, oltop, last, options_block))
2559 printf("\n");
2560 else
2561 if ((pw = getpwuid(*((uid_t *)value))))
2562 printf("%s\n", pw->pw_name);
2563 else
2564 printf("%ld\n", (long int)(*((uid_t *)value)));
2565 break;
2566
2567 /* If the numerical value is unset, try for the string value */
2568
2569 case opt_expand_gid:
2570 if (! *get_set_flag(name, oltop, last, options_block))
2571 {
2572 sprintf(CS name2, "*expand_%.50s", name);
2573 if ( (ol2 = find_option(name2, oltop, last))
2574 && (ol2->type & opt_mask) == opt_stringptr)
2575 {
2576 if (options_block)
2577 s = *USS (US options_block + ol2->v.offset);
2578 else
2579 s = *USS ol2->v.value;
2580 if (!no_labels) printf("%s = ", name);
2581 printf("%s\n", s ? string_printing(s) : US"");
2582 break;
2583 }
2584 }
2585
2586 /* Else fall through */
2587
2588 case opt_gid:
2589 if (!no_labels) printf("%s = ", name);
2590 if (! *get_set_flag(name, oltop, last, options_block))
2591 printf("\n");
2592 else
2593 if ((gr = getgrgid(*((int *)value))))
2594 printf("%s\n", gr->gr_name);
2595 else
2596 printf("%ld\n", (long int)(*((int *)value)));
2597 break;
2598
2599 case opt_uidlist:
2600 uidlist = *((uid_t **)value);
2601 if (!no_labels) printf("%s =", name);
2602 if (uidlist)
2603 {
2604 uschar sep = no_labels ? '\0' : ' ';
2605 for (int i = 1; i <= (int)(uidlist[0]); i++)
2606 {
2607 uschar *name = NULL;
2608 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2609 if (sep != '\0') printf("%c", sep);
2610 if (name) printf("%s", name);
2611 else printf("%ld", (long int)(uidlist[i]));
2612 sep = ':';
2613 }
2614 }
2615 printf("\n");
2616 break;
2617
2618 case opt_gidlist:
2619 gidlist = *((gid_t **)value);
2620 if (!no_labels) printf("%s =", name);
2621 if (gidlist)
2622 {
2623 uschar sep = no_labels ? '\0' : ' ';
2624 for (int i = 1; i <= (int)(gidlist[0]); i++)
2625 {
2626 uschar *name = NULL;
2627 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2628 if (sep != '\0') printf("%c", sep);
2629 if (name) printf("%s", name);
2630 else printf("%ld", (long int)(gidlist[i]));
2631 sep = ':';
2632 }
2633 }
2634 printf("\n");
2635 break;
2636
2637 case opt_time:
2638 if (!no_labels) printf("%s = ", name);
2639 printf("%s\n", readconf_printtime(*((int *)value)));
2640 break;
2641
2642 case opt_timelist:
2643 {
2644 int *list = (int *)value;
2645 if (!no_labels) printf("%s = ", name);
2646 for (int i = 0; i < list[1]; i++)
2647 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2648 printf("\n");
2649 }
2650 break;
2651
2652 case opt_bit:
2653 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2654 "" : "no_", name);
2655 break;
2656
2657 case opt_expand_bool:
2658 sprintf(CS name2, "*expand_%.50s", name);
2659 if ((ol2 = find_option(name2, oltop, last)) && ol2->v.value)
2660 {
2661 if (options_block)
2662 s = *USS (US options_block + ol2->v.offset);
2663 else
2664 s = *USS ol2->v.value;
2665 if (s)
2666 {
2667 if (!no_labels) printf("%s = ", name);
2668 printf("%s\n", string_printing(s));
2669 break;
2670 }
2671 /* s == NULL => string not set; fall through */
2672 }
2673
2674 /* Fall through */
2675
2676 case opt_bool:
2677 case opt_bool_verify:
2678 case opt_bool_set:
2679 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2680 break;
2681
2682 case opt_func:
2683 ol->v.fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2684 break;
2685 }
2686 return TRUE;
2687 }
2688
2689
2690
2691 /*************************************************
2692 * Print value from main configuration *
2693 *************************************************/
2694
2695 /* This function, called as a result of encountering the -bP option,
2696 causes the value of any main configuration variable to be output if the
2697 second argument is NULL. There are some special values:
2698
2699 all print all main configuration options
2700 config_file print the name of the configuration file
2701 (configure_file will still work, for backward
2702 compatibility)
2703 routers print the routers' configurations
2704 transports print the transports' configuration
2705 authenticators print the authenticators' configuration
2706 macros print the macros' configuration
2707 router_list print a list of router names
2708 transport_list print a list of transport names
2709 authenticator_list print a list of authentication mechanism names
2710 macro_list print a list of macro names
2711 +name print a named list item
2712 local_scan print the local_scan options
2713 config print the configuration as it is parsed
2714 environment print the used execution environment
2715
2716 If the second argument is not NULL, it must be one of "router", "transport",
2717 "authenticator" or "macro" in which case the first argument identifies the
2718 driver whose options are to be printed.
2719
2720 Arguments:
2721 name option name if type == NULL; else driver name
2722 type NULL or driver type name, as described above
2723 no_labels avoid the "foo = " at the start of an item
2724
2725 Returns: Boolean success
2726 */
2727
2728 BOOL
2729 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2730 {
2731 BOOL names_only = FALSE;
2732 optionlist *ol2 = NULL;
2733 driver_instance *d = NULL;
2734 int size = 0;
2735
2736 if (!type)
2737 {
2738 if (*name == '+')
2739 {
2740 tree_node *t;
2741 BOOL found = FALSE;
2742 static uschar *types[] = { US"address", US"domain", US"host",
2743 US"localpart" };
2744 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2745 &hostlist_anchor, &localpartlist_anchor };
2746
2747 for (int i = 0; i < 4; i++)
2748 if ((t = tree_search(*(anchors[i]), name+1)))
2749 {
2750 namedlist_block * nb = t->data.ptr;
2751 const uschar * s = nb->hide ? hidden : nb->string;
2752 found = TRUE;
2753 if (no_labels)
2754 printf("%s\n", CCS s);
2755 else
2756 printf("%slist %s = %s\n", types[i], name+1, CCS s);
2757 }
2758
2759 if (!found)
2760 printf("no address, domain, host, or local part list called \"%s\" "
2761 "exists\n", name+1);
2762
2763 return found;
2764 }
2765
2766 if ( Ustrcmp(name, "configure_file") == 0
2767 || Ustrcmp(name, "config_file") == 0)
2768 {
2769 printf("%s\n", CS config_main_filename);
2770 return TRUE;
2771 }
2772
2773 if (Ustrcmp(name, "all") == 0)
2774 {
2775 for (optionlist * ol = optionlist_config;
2776 ol < optionlist_config + nelem(optionlist_config); ol++)
2777 if (!(ol->type & opt_hidden))
2778 (void) print_ol(ol, US ol->name, NULL,
2779 optionlist_config, nelem(optionlist_config),
2780 no_labels);
2781 return TRUE;
2782 }
2783
2784 if (Ustrcmp(name, "local_scan") == 0)
2785 {
2786 #ifndef LOCAL_SCAN_HAS_OPTIONS
2787 printf("local_scan() options are not supported\n");
2788 return FALSE;
2789 #else
2790 for (optionlist * ol = local_scan_options;
2791 ol < local_scan_options + local_scan_options_count; ol++)
2792 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2793 local_scan_options_count, no_labels);
2794 return TRUE;
2795 #endif
2796 }
2797
2798 if (Ustrcmp(name, "config") == 0)
2799 {
2800 print_config(f.admin_user, no_labels);
2801 return TRUE;
2802 }
2803
2804 if (Ustrcmp(name, "routers") == 0)
2805 {
2806 type = US"router";
2807 name = NULL;
2808 }
2809 else if (Ustrcmp(name, "transports") == 0)
2810 {
2811 type = US"transport";
2812 name = NULL;
2813 }
2814 else if (Ustrcmp(name, "authenticators") == 0)
2815 {
2816 type = US"authenticator";
2817 name = NULL;
2818 }
2819 else if (Ustrcmp(name, "macros") == 0)
2820 {
2821 type = US"macro";
2822 name = NULL;
2823 }
2824 else if (Ustrcmp(name, "router_list") == 0)
2825 {
2826 type = US"router";
2827 name = NULL;
2828 names_only = TRUE;
2829 }
2830 else if (Ustrcmp(name, "transport_list") == 0)
2831 {
2832 type = US"transport";
2833 name = NULL;
2834 names_only = TRUE;
2835 }
2836 else if (Ustrcmp(name, "authenticator_list") == 0)
2837 {
2838 type = US"authenticator";
2839 name = NULL;
2840 names_only = TRUE;
2841 }
2842 else if (Ustrcmp(name, "macro_list") == 0)
2843 {
2844 type = US"macro";
2845 name = NULL;
2846 names_only = TRUE;
2847 }
2848 else if (Ustrcmp(name, "environment") == 0)
2849 {
2850 if (environ)
2851 {
2852 uschar ** p;
2853 for (p = USS environ; *p; p++) ;
2854 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2855
2856 for (p = USS environ; *p; p++)
2857 {
2858 uschar * q;
2859 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2860 puts(CS *p);
2861 }
2862 }
2863 return TRUE;
2864 }
2865
2866 else
2867 return print_ol(find_option(name,
2868 optionlist_config, nelem(optionlist_config)),
2869 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2870 }
2871
2872 /* Handle the options for a router or transport. Skip options that are flagged
2873 as hidden. Some of these are options with names starting with '*', used for
2874 internal alternative representations of other options (which the printing
2875 function will sort out). Others are synonyms kept for backward compatibility.
2876 */
2877
2878 if (Ustrcmp(type, "router") == 0)
2879 {
2880 d = (driver_instance *)routers;
2881 ol2 = optionlist_routers;
2882 size = optionlist_routers_size;
2883 }
2884 else if (Ustrcmp(type, "transport") == 0)
2885 {
2886 d = (driver_instance *)transports;
2887 ol2 = optionlist_transports;
2888 size = optionlist_transports_size;
2889 }
2890 else if (Ustrcmp(type, "authenticator") == 0)
2891 {
2892 d = (driver_instance *)auths;
2893 ol2 = optionlist_auths;
2894 size = optionlist_auths_size;
2895 }
2896
2897 else if (Ustrcmp(type, "macro") == 0)
2898 {
2899 /* People store passwords in macros and they were previously not available
2900 for printing. So we have an admin_users restriction. */
2901 if (!f.admin_user)
2902 {
2903 fprintf(stderr, "exim: permission denied\n");
2904 return FALSE;
2905 }
2906 for (macro_item * m = macros; m; m = m->next)
2907 if (!name || Ustrcmp(name, m->name) == 0)
2908 {
2909 if (names_only)
2910 printf("%s\n", CS m->name);
2911 else if (no_labels)
2912 printf("%s\n", CS m->replacement);
2913 else
2914 printf("%s=%s\n", CS m->name, CS m->replacement);
2915 if (name)
2916 return TRUE;
2917 }
2918 if (!name) return TRUE;
2919
2920 printf("%s %s not found\n", type, name);
2921 return FALSE;
2922 }
2923
2924 if (names_only)
2925 {
2926 for (; d; d = d->next) printf("%s\n", CS d->name);
2927 return TRUE;
2928 }
2929
2930 /* Either search for a given driver, or print all of them */
2931
2932 for (; d; d = d->next)
2933 {
2934 BOOL rc = FALSE;
2935 if (!name)
2936 printf("\n%s %s:\n", d->name, type);
2937 else if (Ustrcmp(d->name, name) != 0) continue;
2938
2939 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2940 if (!(ol->type & opt_hidden))
2941 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2942
2943 for (optionlist * ol = d->info->options;
2944 ol < d->info->options + *(d->info->options_count); ol++)
2945 if (!(ol->type & opt_hidden))
2946 rc |= print_ol(ol, US ol->name, d, d->info->options,
2947 *d->info->options_count, no_labels);
2948
2949 if (name) return rc;
2950 }
2951 if (!name) return TRUE;
2952
2953 printf("%s %s not found\n", type, name);
2954 return FALSE;
2955 }
2956
2957
2958
2959 /*************************************************
2960 * Read a named list item *
2961 *************************************************/
2962
2963 /* This function reads a name and a list (i.e. string). The name is used to
2964 save the list in a tree, sorted by its name. Each entry also has a number,
2965 which can be used for caching tests, but if the string contains any expansion
2966 items other than $key, the number is set negative to inhibit caching. This
2967 mechanism is used for domain, host, and address lists that are referenced by
2968 the "+name" syntax.
2969
2970 Arguments:
2971 anchorp points to the tree anchor
2972 numberp points to the current number for this tree
2973 max the maximum number permitted
2974 s the text of the option line, starting immediately after the name
2975 of the list type
2976 tname the name of the list type, for messages
2977 hide do not output value on "-bP"
2978
2979 Returns: nothing
2980 */
2981
2982 static void
2983 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2984 uschar *tname, BOOL hide)
2985 {
2986 BOOL forcecache = FALSE;
2987 uschar *ss;
2988 tree_node *t;
2989 namedlist_block * nb = store_get(sizeof(namedlist_block), FALSE);
2990
2991 if (Ustrncmp(s, "_cache", 6) == 0)
2992 {
2993 forcecache = TRUE;
2994 s += 6;
2995 }
2996
2997 if (!isspace(*s))
2998 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2999
3000 if (*numberp >= max)
3001 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3002 tname, max);
3003
3004 while (isspace(*s)) s++;
3005 ss = s;
3006 while (isalnum(*s) || *s == '_') s++;
3007 t = store_get(sizeof(tree_node) + s-ss, is_tainted(ss));
3008 Ustrncpy(t->name, ss, s-ss);
3009 t->name[s-ss] = 0;
3010 while (isspace(*s)) s++;
3011
3012 if (!tree_insertnode(anchorp, t))
3013 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3014 "duplicate name \"%s\" for a named %s", t->name, tname);
3015
3016 t->data.ptr = nb;
3017 nb->number = *numberp;
3018 *numberp += 1;
3019 nb->hide = hide;
3020
3021 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3022 "missing '=' after \"%s\"", t->name);
3023 while (isspace(*s)) s++;
3024 nb->string = read_string(s, t->name);
3025 nb->cache_data = NULL;
3026
3027 /* Check the string for any expansions; if any are found, mark this list
3028 uncacheable unless the user has explicited forced caching. */
3029
3030 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3031 }
3032
3033
3034
3035
3036 /*************************************************
3037 * Unpick data for a rate limit *
3038 *************************************************/
3039
3040 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3041 separate values.
3042
3043 Arguments:
3044 s string, in the form t,b,f,l
3045 where t is the threshold (integer)
3046 b is the initial delay (time)
3047 f is the multiplicative factor (fixed point)
3048 k is the maximum time (time)
3049 threshold where to store threshold
3050 base where to store base in milliseconds
3051 factor where to store factor in milliseconds
3052 limit where to store limit
3053
3054 Returns: nothing (panics on error)
3055 */
3056
3057 static void
3058 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3059 int *limit)
3060 {
3061 uschar bstring[16], lstring[16];
3062
3063 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3064 factor, lstring) == 4)
3065 {
3066 *base = readconf_readtime(bstring, 0, TRUE);
3067 *limit = readconf_readtime(lstring, 0, TRUE);
3068 if (*base >= 0 && *limit >= 0) return;
3069 }
3070 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3071 }
3072
3073
3074
3075
3076 /*************************************************
3077 * Read main configuration options *
3078 *************************************************/
3079
3080 /* This function is the first to be called for configuration reading. It
3081 opens the configuration file and reads general configuration settings until
3082 it reaches the end of the configuration section. The file is then left open so
3083 that the remaining configuration data can subsequently be read if needed for
3084 this run of Exim.
3085
3086 The configuration file must be owned either by root or exim, and be writeable
3087 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3088 in the config file, so the test is done on the compiled in values. A slight
3089 anomaly, to be carefully documented.
3090
3091 The name of the configuration file is taken from a list that is included in the
3092 binary of Exim. It can be altered from the command line, but if that is done,
3093 root privilege is immediately withdrawn unless the caller is root or exim.
3094 The first file on the list that exists is used.
3095
3096 For use on multiple systems that share file systems, first look for a
3097 configuration file whose name has the current node name on the end. If that is
3098 not found, try the generic name. For really contorted configurations, that run
3099 multiple Exims with different uid settings, first try adding the effective uid
3100 before the node name. These complications are going to waste resources on most
3101 systems. Therefore they are available only when requested by compile-time
3102 options. */
3103
3104 void
3105 readconf_main(BOOL nowarn)
3106 {
3107 int sep = 0;
3108 struct stat statbuf;
3109 uschar *s, *filename;
3110 const uschar *list = config_main_filelist;
3111
3112 /* Loop through the possible file names */
3113
3114 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3115 {
3116
3117 /* Cut out all the fancy processing unless specifically wanted */
3118
3119 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3120 uschar *suffix = filename + Ustrlen(filename);
3121
3122 /* Try for the node-specific file if a node name exists */
3123
3124 #ifdef CONFIGURE_FILE_USE_NODE
3125 struct utsname uts;
3126 if (uname(&uts) >= 0)
3127 {
3128 #ifdef CONFIGURE_FILE_USE_EUID
3129 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3130 config_file = Ufopen(filename, "rb");
3131 if (config_file == NULL)
3132 #endif /* CONFIGURE_FILE_USE_EUID */
3133 {
3134 sprintf(CS suffix, ".%.256s", uts.nodename);
3135 config_file = Ufopen(filename, "rb");
3136 }
3137 }
3138 #endif /* CONFIGURE_FILE_USE_NODE */
3139
3140 /* Otherwise, try the generic name, possibly with the euid added */
3141
3142 #ifdef CONFIGURE_FILE_USE_EUID
3143 if (config_file == NULL)
3144 {
3145 sprintf(CS suffix, ".%ld", (long int)original_euid);
3146 config_file = Ufopen(filename, "rb");
3147 }
3148 #endif /* CONFIGURE_FILE_USE_EUID */
3149
3150 /* Finally, try the unadorned name */
3151
3152 if (config_file == NULL)
3153 {
3154 *suffix = 0;
3155 config_file = Ufopen(filename, "rb");
3156 }
3157 #else /* if neither defined */
3158
3159 /* This is the common case when the fancy processing is not included. */
3160
3161 config_file = Ufopen(filename, "rb");
3162 #endif
3163
3164 /* If the file does not exist, continue to try any others. For any other
3165 error, break out (and die). */
3166
3167 if (config_file != NULL || errno != ENOENT) break;
3168 }
3169
3170 /* On success, save the name for verification; config_filename is used when
3171 logging configuration errors (it changes for .included files) whereas
3172 config_main_filename is the name shown by -bP. Failure to open a configuration
3173 file is a serious disaster. */
3174
3175 if (config_file)
3176 {
3177 uschar *last_slash = Ustrrchr(filename, '/');
3178 config_filename = config_main_filename = string_copy(filename);
3179
3180 /* The config_main_directory we need for the $config_dir expansion.
3181 config_main_filename we need for $config_file expansion.
3182 And config_dir is the directory of the current configuration, used for
3183 relative .includes. We do need to know it's name, as we change our working
3184 directory later. */
3185
3186 if (filename[0] == '/')
3187 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3188 else
3189 {
3190 /* relative configuration file name: working dir + / + basename(filename) */
3191
3192 uschar buf[PATH_MAX];
3193 gstring * g;
3194
3195 if (os_getcwd(buf, PATH_MAX) == NULL)
3196 {
3197 perror("exim: getcwd");
3198 exit(EXIT_FAILURE);
3199 }
3200 g = string_cat(NULL, buf);
3201
3202 /* If the dir does not end with a "/", append one */
3203 if (g->s[g->ptr-1] != '/')
3204 g = string_catn(g, US"/", 1);
3205
3206 /* If the config file contains a "/", extract the directory part */
3207 if (last_slash)
3208 g = string_catn(g, filename, last_slash - filename);
3209
3210 config_main_directory = string_from_gstring(g);
3211 }
3212 config_directory = config_main_directory;
3213 }
3214 else
3215 {
3216 if (filename == NULL)
3217 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3218 "%s", config_main_filelist);
3219 else
3220 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3221 "configuration file %s", filename));
3222 }
3223
3224 /* Now, once we found and opened our configuration file, we change the directory
3225 to a safe place. Later we change to $spool_directory. */
3226
3227 if (Uchdir("/") < 0)
3228 {
3229 perror("exim: chdir `/': ");
3230 exit(EXIT_FAILURE);
3231 }
3232
3233 /* Check the status of the file we have opened, if we have retained root
3234 privileges and the file isn't /dev/null (which *should* be 0666). */
3235
3236 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3237 {
3238 if (fstat(fileno(config_file), &statbuf) != 0)
3239 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3240 big_buffer);
3241
3242 if ((statbuf.st_uid != root_uid /* owner not root */
3243 #ifdef CONFIGURE_OWNER
3244 && statbuf.st_uid != config_uid /* owner not the special one */
3245 #endif
3246 ) || /* or */
3247 (statbuf.st_gid != root_gid /* group not root & */
3248 #ifdef CONFIGURE_GROUP
3249 && statbuf.st_gid != config_gid /* group not the special one */
3250 #endif
3251 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3252 /* or */
3253 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3254
3255 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3256 "wrong owner, group, or mode", big_buffer);
3257
3258 /* Do a dummy store-allocation of a size related to the (toplevel) file size.
3259 This assumes we will need this much storage to handle all the allocations
3260 during startup; it won't help when .include is being used. When it does, it
3261 will cut down on the number of store blocks (and malloc calls, and sbrk
3262 syscalls). It also assume we're on the relevant pool. */
3263
3264 if (statbuf.st_size > 8192)
3265 {
3266 rmark r = store_mark();
3267 void * dummy = store_get((int)statbuf.st_size, FALSE);
3268 store_reset(r);
3269 }
3270 }
3271
3272 /* Process the main configuration settings. They all begin with a lower case
3273 letter. If we see something starting with an upper case letter, it is taken as
3274 a macro definition. */
3275
3276 while ((s = get_config_line()))
3277 {
3278 BOOL hide;
3279 uschar * t;
3280
3281 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3282 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3283 "found unexpected BOM (Byte Order Mark)");
3284
3285 if (isupper(*s))
3286 {
3287 if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE);
3288 continue;
3289 }
3290
3291 t = (hide = Ustrncmp(s, "hide", 4) == 0 && isspace(s[4])) ? s + 5 : s;
3292
3293 if (Ustrncmp(t, "domainlist", 10) == 0)
3294 read_named_list(&domainlist_anchor, &domainlist_count,
3295 MAX_NAMED_LIST, t+10, US"domain list", hide);
3296
3297 else if (Ustrncmp(t, "hostlist", 8) == 0)
3298 read_named_list(&hostlist_anchor, &hostlist_count,
3299 MAX_NAMED_LIST, t+8, US"host list", hide);
3300
3301 else if (Ustrncmp(t, US"addresslist", 11) == 0)
3302 read_named_list(&addresslist_anchor, &addresslist_count,
3303 MAX_NAMED_LIST, t+11, US"address list", hide);
3304
3305 else if (Ustrncmp(t, US"localpartlist", 13) == 0)
3306 read_named_list(&localpartlist_anchor, &localpartlist_count,
3307 MAX_NAMED_LIST, t+13, US"local part list", hide);
3308
3309 else
3310 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3311 NULL, US"main option \"%s\" unknown");
3312 }
3313
3314
3315 /* If local_sender_retain is set, local_from_check must be unset. */
3316
3317 if (local_sender_retain && local_from_check)
3318 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3319 "local_sender_retain are set; this combination is not allowed");
3320
3321 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3322 wanted. */
3323
3324 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3325
3326 /* The max retry interval must not be greater than 24 hours. */
3327
3328 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3329
3330 /* remote_max_parallel must be > 0 */
3331
3332 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3333
3334 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3335 start of a new SMTP message. */
3336
3337 freeze_tell_config = freeze_tell;
3338
3339 /* The primary host name may be required for expansion of spool_directory
3340 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3341 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3342 canonize it. Some people like upper case letters in their host names, so we
3343 don't force the case. */
3344
3345 if (primary_hostname == NULL)
3346 {
3347 const uschar *hostname;
3348 struct utsname uts;
3349 if (uname(&uts) < 0)
3350 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3351 hostname = US uts.nodename;
3352
3353 if (Ustrchr(hostname, '.') == NULL)
3354 {
3355 int af = AF_INET;
3356 struct hostent *hostdata;
3357
3358 #if HAVE_IPV6
3359 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3360 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3361 MCL_DOMAIN, TRUE, NULL) != OK))
3362 af = AF_INET6;
3363 #else
3364 af = AF_INET;
3365 #endif
3366
3367 for (;;)
3368 {
3369 #if HAVE_IPV6
3370 #if HAVE_GETIPNODEBYNAME
3371 int error_num;
3372 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3373 #else
3374 hostdata = gethostbyname2(CS hostname, af);
3375 #endif
3376 #else
3377 hostdata = gethostbyname(CS hostname);
3378 #endif
3379
3380 if (hostdata != NULL)
3381 {
3382 hostname = US hostdata->h_name;
3383 break;
3384 }
3385
3386 if (af == AF_INET) break;
3387 af = AF_INET;
3388 }
3389 }
3390
3391 primary_hostname = string_copy(hostname);
3392 }
3393
3394 /* Set up default value for smtp_active_hostname */
3395
3396 smtp_active_hostname = primary_hostname;
3397
3398 /* If spool_directory wasn't set in the build-time configuration, it must have
3399 got set above. Of course, writing to the log may not work if log_file_path is
3400 not set, but it will at least get to syslog or somewhere, with any luck. */
3401
3402 if (!*spool_directory)
3403 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3404 "proceed");
3405
3406 /* Expand the spool directory name; it may, for example, contain the primary
3407 host name. Same comment about failure. */
3408
3409 if (!(s = expand_string(spool_directory)))
3410 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3411 "\"%s\": %s", spool_directory, expand_string_message);
3412 spool_directory = s;
3413
3414 /* Expand log_file_path, which must contain "%s" in any component that isn't
3415 the null string or "syslog". It is also allowed to contain one instance of %D
3416 or %M. However, it must NOT contain % followed by anything else. */
3417
3418 if (*log_file_path)
3419 {
3420 const uschar *ss, *sss;
3421 int sep = ':'; /* Fixed for log file path */
3422 if (!(s = expand_string(log_file_path)))
3423 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3424 "\"%s\": %s", log_file_path, expand_string_message);
3425
3426 ss = s;
3427 while ((sss = string_nextinlist(&ss, &sep, big_buffer, big_buffer_size)))
3428 {
3429 uschar *t;
3430 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3431 if (!(t = Ustrstr(sss, "%s")))
3432 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3433 "contain \"%%s\"", sss);
3434 *t = 'X';
3435 if ((t = Ustrchr(sss, '%')))
3436 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3437 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3438 "unexpected \"%%\" character", s);
3439 }
3440
3441 log_file_path = s;
3442 }
3443
3444 /* Interpret syslog_facility into an integer argument for 'ident' param to
3445 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3446 leading "log_". */
3447
3448 if (syslog_facility_str)
3449 {
3450 int i;
3451 uschar *s = syslog_facility_str;
3452
3453 if ((Ustrlen(syslog_facility_str) >= 4) &&
3454 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3455 s += 4;
3456
3457 for (i = 0; i < syslog_list_size; i++)
3458 if (strcmpic(s, syslog_list[i].name) == 0)
3459 {
3460 syslog_facility = syslog_list[i].value;
3461 break;
3462 }
3463
3464 if (i >= syslog_list_size)
3465 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3466 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3467 }
3468
3469 /* Expand pid_file_path */
3470
3471 if (*pid_file_path != 0)
3472 {
3473 if (!(s = expand_string(pid_file_path)))
3474 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3475 "\"%s\": %s", pid_file_path, expand_string_message);
3476 pid_file_path = s;
3477 }
3478
3479 /* Set default value of process_log_path */
3480
3481 if (!process_log_path || *process_log_path =='\0')
3482 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3483
3484 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3485 message. */
3486
3487 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3488
3489 /* Unpick the SMTP rate limiting options, if set */
3490
3491 if (smtp_ratelimit_mail)
3492 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3493 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3494
3495 if (smtp_ratelimit_rcpt)
3496 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3497 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3498
3499 /* The qualify domains default to the primary host name */
3500
3501 if (!qualify_domain_sender)
3502 qualify_domain_sender = primary_hostname;
3503 if (!qualify_domain_recipient)
3504 qualify_domain_recipient = qualify_domain_sender;
3505
3506 /* Setting system_filter_user in the configuration sets the gid as well if a
3507 name is given, but a numerical value does not. */
3508
3509 if (system_filter_uid_set && !system_filter_gid_set)
3510 {
3511 struct passwd *pw = getpwuid(system_filter_uid);
3512 if (!pw)
3513 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3514 (long int)system_filter_uid);
3515 system_filter_gid = pw->pw_gid;
3516 system_filter_gid_set = TRUE;
3517 }
3518
3519 /* If the errors_reply_to field is set, check that it is syntactically valid
3520 and ensure it contains a domain. */
3521
3522 if (errors_reply_to)
3523 {
3524 uschar *errmess;
3525 int start, end, domain;
3526 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3527 &start, &end, &domain, FALSE);
3528
3529 if (!recipient)
3530 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3531 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3532
3533 if (domain == 0)
3534 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3535 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3536 }
3537
3538 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3539 smtp_accept_max must also be set. */
3540
3541 if (smtp_accept_max == 0 &&
3542 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3543 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3544 "smtp_accept_max must be set if smtp_accept_queue or "
3545 "smtp_accept_max_per_host is set");
3546
3547 /* Set up the host number if anything is specified. It is an expanded string
3548 so that it can be computed from the host name, for example. We do this last
3549 so as to ensure that everything else is set up before the expansion. */
3550
3551 if (host_number_string)
3552 {
3553 long int n;
3554 uschar *end;
3555 uschar *s = expand_string(host_number_string);
3556
3557 if (!s)
3558 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3559 "failed to expand localhost_number \"%s\": %s",
3560 host_number_string, expand_string_message);
3561 n = Ustrtol(s, &end, 0);
3562 while (isspace(*end)) end++;
3563 if (*end != 0)
3564 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3565 "localhost_number value is not a number: %s", s);
3566 if (n > LOCALHOST_MAX)
3567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3568 "localhost_number is greater than the maximum allowed value (%d)",
3569 LOCALHOST_MAX);
3570 host_number = n;
3571 }
3572
3573 #ifndef DISABLE_TLS
3574 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3575
3576 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3577 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3578 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3579 tls_verify_hosts ? "" : "try_");
3580
3581 /* Magic number: at time of writing, 1024 has been the long-standing value
3582 used by so many clients, and what Exim used to use always, that it makes
3583 sense to just min-clamp this max-clamp at that. */
3584 if (tls_dh_max_bits < 1024)
3585 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3586 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3587
3588 /* If openssl_options is set, validate it */
3589 if (openssl_options)
3590 {
3591 # ifdef USE_GNUTLS
3592 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3593 "openssl_options is set but we're using GnuTLS");
3594 # else
3595 long dummy;
3596 if (!tls_openssl_options_parse(openssl_options, &dummy))
3597 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3598 "openssl_options parse error: %s", openssl_options);
3599 # endif
3600 }
3601 #endif /*DISABLE_TLS*/
3602
3603 if (!nowarn && !keep_environment && environ && *environ)
3604 log_write(0, LOG_MAIN,
3605 "Warning: purging the environment.\n"
3606 " Suggested action: use keep_environment.");
3607 }
3608
3609
3610
3611 /*************************************************
3612 * Initialize one driver *
3613 *************************************************/
3614
3615 /* This is called once the driver's generic options, if any, have been read.
3616 We can now find the driver, set up defaults for the private options, and
3617 unset any "set" bits in the private options table (which might have been
3618 set by another incarnation of the same driver).
3619
3620 Arguments:
3621 d pointer to driver instance block, with generic
3622 options filled in
3623 drivers_available vector of available drivers
3624 size_of_info size of each block in drivers_available
3625 class class of driver, for error message
3626
3627 Returns: pointer to the driver info block
3628 */
3629
3630 static driver_info *
3631 init_driver(driver_instance *d, driver_info *drivers_available,
3632 int size_of_info, uschar *class)
3633 {
3634 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3635 dd = (driver_info *)((US dd) + size_of_info))
3636 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3637 {
3638 int len = dd->options_len;
3639 d->info = dd;
3640 d->options_block = store_get(len, FALSE);
3641 memcpy(d->options_block, dd->options_block, len);
3642 for (int i = 0; i < *(dd->options_count); i++)
3643 dd->options[i].type &= ~opt_set;
3644 return dd;
3645 }
3646
3647 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3648 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3649
3650 return NULL; /* never obeyed */
3651 }
3652
3653
3654
3655
3656 /*************************************************
3657 * Initialize driver list *
3658 *************************************************/
3659
3660 /* This function is called for routers, transports, and authentication
3661 mechanisms. It reads the data from the current point in the configuration file
3662 up to the end of the section, and sets up a chain of instance blocks according
3663 to the file's contents. The file will already have been opened by a call to
3664 readconf_main, and must be left open for subsequent reading of further data.
3665
3666 Any errors cause a panic crash. Note that the blocks with names driver_info and
3667 driver_instance must map the first portions of all the _info and _instance
3668 blocks for this shared code to work.
3669
3670 Arguments:
3671 class "router", "transport", or "authenticator"
3672 anchor &routers, &transports, &auths
3673 drivers_available available drivers
3674 size_of_info size of each info block
3675 instance_default points to default data for an instance
3676 instance_size size of instance block
3677 driver_optionlist generic option list
3678 driver_optionlist_count count of generic option list
3679
3680 Returns: nothing
3681 */
3682
3683 void
3684 readconf_driver_init(
3685 uschar *class,
3686 driver_instance **anchor,
3687 driver_info *drivers_available,
3688 int size_of_info,
3689 void *instance_default,
3690 int instance_size,
3691 optionlist *driver_optionlist,
3692 int driver_optionlist_count)
3693 {
3694 driver_instance **p = anchor;
3695 driver_instance *d = NULL;
3696 uschar *buffer;
3697
3698 while ((buffer = get_config_line()))
3699 {
3700 uschar name[64];
3701 uschar *s;
3702
3703 /* Read the first name on the line and test for the start of a new driver. A
3704 macro definition indicates the end of the previous driver. If this isn't the
3705 start of a new driver, the line will be re-read. */
3706
3707 s = readconf_readname(name, sizeof(name), buffer);
3708
3709 /* Handle macro definition, first finishing off the initialization of the
3710 previous driver, if any. */
3711
3712 if (isupper(*name) && *s == '=')
3713 {
3714 if (d)
3715 {
3716 if (!d->driver_name)
3717 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3718 "no driver defined for %s \"%s\"", class, d->name);
3719 /* s is using big_buffer, so this call had better not */
3720 (d->info->init)(d);
3721 d = NULL;
3722 }
3723 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE);
3724 continue;
3725 }
3726
3727 /* If the line starts with a name terminated by a colon, we are at the
3728 start of the definition of a new driver. The rest of the line must be
3729 blank. */
3730
3731 if (*s++ == ':')
3732 {
3733 /* Finish off initializing the previous driver. */
3734
3735 if (d)
3736 {
3737 if (!d->driver_name)
3738 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3739 "no driver defined for %s \"%s\"", class, d->name);
3740 (d->info->init)(d);
3741 }
3742
3743 /* Check that we haven't already got a driver of this name */
3744
3745 for (d = *anchor; d; d = d->next)
3746 if (Ustrcmp(name, d->name) == 0)
3747 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3748 "there are two %ss called \"%s\"", class, name);
3749
3750 /* Set up a new driver instance data block on the chain, with
3751 its default values installed. */
3752
3753 d = store_get(instance_size, FALSE);
3754 memcpy(d, instance_default, instance_size);
3755 *p = d;
3756 p = &d->next;
3757 d->name = string_copy(name);
3758
3759 /* Clear out the "set" bits in the generic options */
3760
3761 for (int i = 0; i < driver_optionlist_count; i++)
3762 driver_optionlist[i].type &= ~opt_set;
3763
3764 /* Check nothing more on this line, then do the next loop iteration. */
3765
3766 while (isspace(*s)) s++;
3767 if (*s) extra_chars_error(s, US"driver name ", name, US"");
3768 continue;
3769 }
3770
3771 /* Not the start of a new driver. Give an error if we have not set up a
3772 current driver yet. */
3773
3774 if (!d)
3775 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3776
3777 /* First look to see if this is a generic option; if it is "driver",
3778 initialize the driver. If is it not a generic option, we can look for a
3779 private option provided that the driver has been previously set up. */
3780
3781 if (readconf_handle_option(buffer, driver_optionlist,
3782 driver_optionlist_count, d, NULL))
3783 {
3784 if (!d->info && d->driver_name)
3785 init_driver(d, drivers_available, size_of_info, class);
3786 }
3787
3788 /* Handle private options - pass the generic block because some may
3789 live therein. A flag with each option indicates if it is in the public
3790 block. */
3791
3792 else if (d->info)
3793 readconf_handle_option(buffer, d->info->options,
3794 *(d->info->options_count), d, US"option \"%s\" unknown");
3795
3796 /* The option is not generic and the driver name has not yet been given. */
3797
3798 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3799 "(\"driver\" must be specified before any private options)", name);
3800 }
3801
3802 /* Run the initialization function for the final driver. */
3803
3804 if (d)
3805 {
3806 if (!d->driver_name)
3807 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3808 "no driver defined for %s \"%s\"", class, d->name);
3809 (d->info->init)(d);
3810 }
3811 }
3812
3813
3814
3815 /*************************************************
3816 * Check driver dependency *
3817 *************************************************/
3818
3819 /* This function is passed a driver instance and a string. It checks whether
3820 any of the string options for the driver contains the given string as an
3821 expansion variable.
3822
3823 Arguments:
3824 d points to a driver instance block
3825 s the string to search for
3826
3827 Returns: TRUE if a dependency is found
3828 */
3829
3830 BOOL
3831 readconf_depends(driver_instance *d, uschar *s)
3832 {
3833 int count = *(d->info->options_count);
3834 uschar *ss;
3835
3836 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3837 if ((ol->type & opt_mask) == opt_stringptr)
3838 {
3839 void * options_block = ol->type & opt_public ? (void *)d : d->options_block;
3840 uschar * value = *USS(US options_block + ol->v.offset);
3841
3842 if (value && (ss = Ustrstr(value, s)) != NULL)
3843 {
3844 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3845 isalnum(ss[Ustrlen(s)])) continue;
3846 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3847 d->name, ol->name, s);
3848 return TRUE;
3849 }
3850 }
3851
3852 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3853 return FALSE;
3854 }
3855
3856
3857
3858
3859 /*************************************************
3860 * Decode an error type for retries *
3861 *************************************************/
3862
3863 /* This function is global because it is also called from the main
3864 program when testing retry information. It decodes strings such as "quota_7d"
3865 into numerical error codes.
3866
3867 Arguments:
3868 pp points to start of text
3869 p points past end of text
3870 basic_errno points to an int to receive the main error number
3871 more_errno points to an int to receive the secondary error data
3872
3873 Returns: NULL if decoded correctly; else points to error text
3874 */
3875
3876 uschar *
3877 readconf_retry_error(const uschar *pp, const uschar *p,
3878 int *basic_errno, int *more_errno)
3879 {
3880 int len;
3881 const uschar *q = pp;
3882 while (q < p && *q != '_') q++;
3883 len = q - pp;
3884
3885 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3886 {
3887 *basic_errno = ERRNO_EXIMQUOTA;
3888 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3889 return US"bad time value";
3890 }
3891
3892 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3893 {
3894 *basic_errno = ECONNREFUSED;
3895 if (q != p)
3896 {
3897 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3898 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3899 else return US"A or MX expected after \"refused\"";
3900 }
3901 }
3902
3903 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3904 {
3905 *basic_errno = ETIMEDOUT;
3906 if (q != p)
3907 {
3908 int i;
3909 int xlen = p - q - 1;
3910 const uschar *x = q + 1;
3911
3912 static uschar *extras[] =
3913 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3914 static int values[] =
3915 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3916
3917 for (i = 0; i < nelem(extras); i++)
3918 if (strncmpic(x, extras[i], xlen) == 0)
3919 {
3920 *more_errno = values[i];
3921 break;
3922 }
3923
3924 if (i >= nelem(extras))
3925 if (strncmpic(x, US"DNS", xlen) == 0)
3926 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3927 "available in retry rules (it has never worked) - treated as "
3928 "\"timeout\"");
3929 else
3930 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3931 }
3932 }
3933
3934 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3935 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3936 strncmpic(pp, US"data_4", 6) == 0)
3937 {
3938 BOOL bad = FALSE;
3939 int x = 255; /* means "any 4xx code" */
3940 if (p != pp + 8) bad = TRUE; else
3941 {
3942 int a = pp[6], b = pp[7];
3943 if (isdigit(a))
3944 {
3945 x = (a - '0') * 10;
3946 if (isdigit(b)) x += b - '0';
3947 else if (b == 'x') x += 100;
3948 else bad = TRUE;
3949 }
3950 else if (a != 'x' || b != 'x') bad = TRUE;
3951 }
3952
3953 if (bad)
3954 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3955 "x is literal and d is any digit", pp);
3956
3957 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3958 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3959 *more_errno = x << 8;
3960 }
3961
3962 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3963 strncmpic(q+1, US"failed", p-q-1) == 0)
3964 *basic_errno = ERRNO_AUTHFAIL;
3965
3966 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3967 *basic_errno = ERRNO_SMTPCLOSED;
3968
3969 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3970 *basic_errno = ERRNO_TLSREQUIRED;
3971
3972 else if (strncmpic(pp, US"lookup", p - pp) == 0)
3973 *basic_errno = ERRNO_UNKNOWNHOST;
3974
3975 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3976 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3977
3978 return NULL;
3979 }
3980
3981
3982
3983
3984 /*************************************************
3985 * Read retry information *
3986 *************************************************/
3987
3988 /* Each line of retry information contains:
3989
3990 . A domain name pattern or an address pattern;
3991
3992 . An error name, possibly with additional data, or *;
3993
3994 . An optional sequence of retry items, each consisting of an identifying
3995 letter, a cutoff time, and optional parameters.
3996
3997 All this is decoded and placed into a control block. */
3998
3999
4000 /* Subroutine to read an argument, preceded by a comma and terminated
4001 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4002 1 = fixed point number (returned *1000).
4003
4004 Arguments:
4005 paddr pointer to pointer to current character; updated
4006 type 0 => read a time; 1 => read a fixed point number
4007
4008 Returns: time in seconds or fixed point number * 1000
4009 */
4010
4011 static int
4012 retry_arg(const uschar **paddr, int type)
4013 {
4014 const uschar *p = *paddr;
4015 const uschar *pp;
4016
4017 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4018
4019 while (isspace(*p)) p++;
4020 pp = p;
4021 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4022
4023 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4024 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4025
4026 *paddr = p;
4027 switch (type)
4028 {
4029 case 0: return readconf_readtime(pp, *p, FALSE);
4030 case 1: return readconf_readfixed(pp, *p);
4031 }
4032 return 0; /* Keep picky compilers happy */
4033 }
4034
4035 /* The function proper */
4036
4037 void
4038 readconf_retries(void)
4039 {
4040 retry_config **chain = &retries;
4041 retry_config *next;
4042 const uschar *p;
4043
4044 while ((p = get_config_line()))
4045 {
4046 retry_rule **rchain;
4047 const uschar *pp;
4048 uschar *error;
4049
4050 next = store_get(sizeof(retry_config), FALSE);
4051 next->next = NULL;
4052 *chain = next;
4053 chain = &(next->next);
4054 next->basic_errno = next->more_errno = 0;
4055 next->senders = NULL;
4056 next->rules = NULL;
4057 rchain = &(next->rules);
4058
4059 next->pattern = string_dequote(&p);
4060 while (isspace(*p)) p++;
4061 pp = p;
4062 while (mac_isgraph(*p)) p++;
4063 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4064 "missing error type in retry rule");
4065
4066 /* Test error names for things we understand. */
4067
4068 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4069 &next->more_errno)))
4070 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4071
4072 /* There may be an optional address list of senders to be used as another
4073 constraint on the rule. This was added later, so the syntax is a bit of a
4074 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4075 an address list. */
4076
4077 while (isspace(*p)) p++;
4078 if (Ustrncmp(p, "senders", 7) == 0)
4079 {
4080 p += 7;
4081 while (isspace(*p)) p++;
4082 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4083 "\"=\" expected after \"senders\" in retry rule");
4084 while (isspace(*p)) p++;
4085 next->senders = string_dequote(&p);
4086 }
4087
4088 /* Now the retry rules. Keep the maximum timeout encountered. */
4089
4090 while (isspace(*p)) p++;
4091
4092 while (*p != 0)
4093 {
4094 retry_rule *rule = store_get(sizeof(retry_rule), FALSE);
4095 *rchain = rule;
4096 rchain = &(rule->next);
4097 rule->next = NULL;
4098 rule->rule = toupper(*p++);
4099 rule->timeout = retry_arg(&p, 0);
4100 if (rule->timeout > retry_maximum_timeout)
4101 retry_maximum_timeout = rule->timeout;
4102
4103 switch (rule->rule)
4104 {
4105 case 'F': /* Fixed interval */
4106 rule->p1 = retry_arg(&p, 0);
4107 break;
4108
4109 case 'G': /* Geometrically increasing intervals */
4110 case 'H': /* Ditto, but with randomness */
4111 rule->p1 = retry_arg(&p, 0);
4112 rule->p2 = retry_arg(&p, 1);
4113 break;
4114
4115 default:
4116 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4117 break;
4118 }
4119
4120 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4121 (rule->rule != 'F' && rule->p2 < 1000))
4122 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4123 "bad parameters for retry rule");
4124
4125 while (isspace(*p)) p++;
4126 if (*p == ';')
4127 {
4128 p++;
4129 while (isspace(*p)) p++;
4130 }
4131 else if (*p != 0)
4132 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4133 }
4134 }
4135 }
4136
4137
4138
4139 /*************************************************
4140 * Initialize authenticators *
4141 *************************************************/
4142
4143 /* Read the authenticators section of the configuration file.
4144
4145 Arguments: none
4146 Returns: nothing
4147 */
4148
4149 static void
4150 auths_init(void)
4151 {
4152 #ifndef DISABLE_PIPE_CONNECT
4153 int nauths = 0;
4154 #endif
4155
4156 readconf_driver_init(US"authenticator",
4157 (driver_instance **)(&auths), /* chain anchor */
4158 (driver_info *)auths_available, /* available drivers */
4159 sizeof(auth_info), /* size of info block */
4160 &auth_defaults, /* default values for generic options */
4161 sizeof(auth_instance), /* size of instance block */
4162 optionlist_auths, /* generic options */
4163 optionlist_auths_size);
4164
4165 for (auth_instance * au = auths; au; au = au->next)
4166 {
4167 if (!au->public_name)
4168 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4169 "the %s authenticator", au->name);
4170
4171 for (auth_instance * bu = au->next; bu; bu = bu->next)
4172 if (strcmpic(au->public_name, bu->public_name) == 0)
4173 if ((au->client && bu->client) || (au->server && bu->server))
4174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4175 "(%s and %s) have the same public name (%s)",
4176 au->client ? US"client" : US"server", au->name, bu->name,
4177 au->public_name);
4178 #ifndef DISABLE_PIPE_CONNECT
4179 nauths++;
4180 #endif
4181 }
4182 #ifndef DISABLE_PIPE_CONNECT
4183 f.smtp_in_early_pipe_no_auth = nauths > 16;
4184 #endif
4185 }
4186
4187
4188
4189
4190 /*************************************************
4191 * Read ACL information *
4192 *************************************************/
4193
4194 /* If this run of Exim is not doing something that involves receiving a
4195 message, we can just skip over the ACL information. No need to parse it.
4196
4197 First, we have a function for acl_read() to call back to get the next line. We
4198 need to remember the line we passed, because at the end it will contain the
4199 name of the next ACL. */
4200
4201 static uschar *acl_line;
4202
4203 static uschar *
4204 acl_callback(void)
4205 {
4206 acl_line = get_config_line();
4207 return acl_line;
4208 }
4209
4210
4211 /* Now the main function:
4212
4213 Arguments: none
4214 Returns: nothing
4215 */
4216
4217 static void
4218 readconf_acl(void)
4219 {
4220 uschar *p;
4221
4222 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4223 between ACLs. */
4224
4225 acl_line = get_config_line();
4226
4227 while(acl_line)
4228 {
4229 uschar name[64];
4230 tree_node *node;
4231 uschar *error;
4232
4233 p = readconf_readname(name, sizeof(name), acl_line);
4234 if (isupper(*name) && *p == '=')
4235 {
4236 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE);
4237 acl_line = get_config_line();
4238 continue;
4239 }
4240
4241 if (*p != ':' || name[0] == 0)
4242 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4243
4244 node = store_get(sizeof(tree_node) + Ustrlen(name), is_tainted(name));
4245 Ustrcpy(node->name, name);
4246 if (!tree_insertnode(&acl_anchor, node))
4247 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4248 "there are two ACLs called \"%s\"", name);
4249
4250 node->data.ptr = acl_read(acl_callback, &error);
4251
4252 if (node->data.ptr == NULL && error != NULL)
4253 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4254 }
4255 }
4256
4257
4258
4259 /*************************************************
4260 * Read configuration for local_scan() *
4261 *************************************************/
4262
4263 /* This function is called after "begin local_scan" is encountered in the
4264 configuration file. If the local_scan() function allows for configuration
4265 options, we can process them. Otherwise, we expire in a panic.
4266
4267 Arguments: none
4268 Returns: nothing
4269 */
4270
4271 static void
4272 local_scan_init(void)
4273 {
4274 #ifndef LOCAL_SCAN_HAS_OPTIONS
4275 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4276 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4277 #else
4278
4279 uschar *p;
4280 while ((p = get_config_line()))
4281 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4282 NULL, US"local_scan option \"%s\" unknown");
4283 #endif
4284 }
4285
4286
4287
4288 /*************************************************
4289 * Read rest of configuration (after main) *
4290 *************************************************/
4291
4292 /* This function reads the rest of the runtime configuration, after the main
4293 configuration. It is called only when actually needed. Each subsequent section
4294 of the configuration starts with a line of the form
4295
4296 begin name
4297
4298 where the name is "routers", "transports", etc. A section is terminated by
4299 hitting the next "begin" line, and the next name is left in next_section.
4300 Because it may confuse people as to whether the names are singular or plural,
4301 we add "s" if it's missing. There is always enough room in next_section for
4302 this. This function is basically just a switch.
4303
4304 Arguments: none
4305 Returns: nothing
4306 */
4307
4308 static uschar *section_list[] = {
4309 US"acls",
4310 US"authenticators",
4311 US"local_scans",
4312 US"retrys",
4313 US"rewrites",
4314 US"routers",
4315 US"transports"};
4316
4317 void
4318 readconf_rest(void)
4319 {
4320 int had = 0;
4321
4322 while(next_section[0] != 0)
4323 {
4324 int bit;
4325 int first = 0;
4326 int last = nelem(section_list);
4327 int mid = last/2;
4328 int n = Ustrlen(next_section);
4329
4330 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, US"s");
4331
4332 for (;;)
4333 {
4334 int c = strcmpic(next_section, section_list[mid]);
4335 if (c == 0) break;
4336 if (c > 0) first = mid + 1; else last = mid;
4337 if (first >= last)
4338 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4339 "\"%.*s\" is not a known configuration section name", n, next_section);
4340 mid = (last + first)/2;
4341 }
4342
4343 bit = 1 << mid;
4344 if (((had ^= bit) & bit) == 0)
4345 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4346 "\"%.*s\" section is repeated in the configuration file", n,
4347 next_section);
4348
4349 switch(mid)
4350 {
4351 case 0: readconf_acl(); break;
4352 case 1: auths_init(); break;
4353 case 2: local_scan_init(); break;
4354 case 3: readconf_retries(); break;
4355 case 4: readconf_rewrites(); break;
4356 case 5: route_init(); break;
4357 case 6: transport_init(); break;
4358 }
4359 }
4360
4361 (void)fclose(config_file);
4362 }
4363
4364 /* Init the storage for the pre-parsed config lines */
4365 void
4366 readconf_save_config(const uschar *s)
4367 {
4368 save_config_line(string_sprintf("# Exim Configuration (%s)",
4369 f.running_in_test_harness ? US"X" : s));
4370 }
4371
4372 static void
4373 save_config_position(const uschar *file, int line)
4374 {
4375 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4376 }
4377
4378 /* Append a pre-parsed logical line to the config lines store,
4379 this operates on a global (static) list that holds all the pre-parsed
4380 config lines, we do no further processing here, output formatting and
4381 honouring of <hide> or macros will be done during output */
4382
4383 static void
4384 save_config_line(const uschar* line)
4385 {
4386 static config_line_item *current;
4387 config_line_item *next;
4388
4389 next = (config_line_item*) store_get(sizeof(config_line_item), FALSE);
4390 next->line = string_copy(line);
4391 next->next = NULL;
4392
4393 if (!config_lines) config_lines = next;
4394 else current->next = next;
4395
4396 current = next;
4397 }
4398
4399 /* List the parsed config lines, care about nice formatting and
4400 hide the <hide> values unless we're the admin user */
4401 void
4402 print_config(BOOL admin, BOOL terse)
4403 {
4404 const int TS = terse ? 0 : 2;
4405 int indent = 0;
4406
4407 for (config_line_item * i = config_lines; i; i = i->next)
4408 {
4409 uschar *current;
4410 uschar *p;
4411
4412 /* skip over to the first non-space */
4413 for (current = i->line; *current && isspace(*current); ++current)
4414 ;
4415
4416 if (*current == '\0')
4417 continue;
4418
4419 /* Collapse runs of spaces. We stop this if we encounter one of the
4420 * following characters: "'$, as this may indicate careful formatting */
4421 for (p = current; *p; ++p)
4422 {
4423 uschar *next;
4424 if (!isspace(*p)) continue;
4425 if (*p != ' ') *p = ' ';
4426
4427 for (next = p; isspace(*next); ++next)
4428 ;
4429
4430 if (next - p > 1)
4431 memmove(p+1, next, Ustrlen(next)+1);
4432
4433 if (*next == '"' || *next == '\'' || *next == '$')
4434 break;
4435 }
4436
4437 /* # lines */
4438 if (current[0] == '#')
4439 puts(CCS current);
4440
4441 /* begin lines are left aligned */
4442 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4443 {
4444 if (!terse) puts("");
4445 puts(CCS current);
4446 indent = TS;
4447 }
4448
4449 /* router/acl/transport block names */
4450 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4451 {
4452 if (!terse) puts("");
4453 printf("%*s%s\n", TS, "", current);
4454 indent = 2 * TS;
4455 }
4456
4457 /* hidden lines (all MACROS or lines prefixed with "hide") */
4458 else if ( !admin
4459 && ( isupper(*current)
4460 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4461 )
4462 )
4463 {
4464 if ((p = Ustrchr(current, '=')))
4465 {
4466 *p = '\0';
4467 printf("%*s%s= %s\n", indent, "", current, CCS hidden);
4468 }
4469 /* e.g.: hide split_spool_directory */
4470 else
4471 printf("%*s\n", indent, CCS hidden);
4472 }
4473
4474 else
4475 /* rest is public */
4476 printf("%*s%s\n", indent, "", current);
4477 }
4478 }
4479
4480 #endif /*!MACRO_PREDEF*/
4481 /* vi: aw ai sw=2
4482 */
4483 /* End of readconf.c */
Unnamed repository; edit this file 'description' to name the repository.