1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
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. */
14 extern char **environ;
16 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 static void save_config_line(const uschar* line);
18 static void save_config_position(const uschar *file, int line);
19 static void print_config(BOOL admin, BOOL terse);
20 static void readconf_options_auths(void);
23 #define CSTATE_STACK_SIZE 10
25 const uschar *config_directory = NULL;
28 /* Structure for chain (stack) of .included files */
30 typedef struct config_file_item {
31 struct config_file_item *next;
32 const uschar *filename;
33 const uschar *directory;
38 /* Structure for chain of configuration lines (-bP config) */
40 typedef struct config_line_item {
41 struct config_line_item *next;
45 static config_line_item* config_lines;
47 /* Structure of table of conditional words and their state transitions */
49 typedef struct cond_item {
57 /* Structure of table of syslog facility names and values */
59 typedef struct syslog_fac_item {
65 static const char * const hidden = "<value not displayable>";
67 /* Static variables */
69 static config_file_item *config_file_stack = NULL; /* For includes */
71 static uschar *syslog_facility_str = NULL;
72 static uschar next_section[24];
73 static uschar time_buffer[24];
75 /* State variables for conditional loading (.ifdef / .else / .endif) */
77 static int cstate = 0;
78 static int cstate_stack_ptr = -1;
79 static int cstate_stack[CSTATE_STACK_SIZE];
81 /* Table of state transitions for handling conditional inclusions. There are
82 four possible state transitions:
86 .elifdef true (or .else)
89 .endif just causes the previous cstate to be popped off the stack */
91 static int next_cstate[3][4] =
93 /* State 0: reading from file, or reading until next .else or .endif */
95 /* State 1: condition failed, skipping until next .else or .endif */
97 /* State 2: skipping until .endif */
101 /* Table of conditionals and the states to set. For each name, there are four
102 values: the length of the name (to save computing it each time), the state to
103 set if a macro was found in the line, the state to set if a macro was not found
104 in the line, and a stack manipulation setting which is:
106 -1 pull state value off the stack
107 0 don't alter the stack
108 +1 push value onto stack, before setting new state
111 static cond_item cond_list[] = {
112 { US"ifdef", 5, 0, 1, 1 },
113 { US"ifndef", 6, 1, 0, 1 },
114 { US"elifdef", 7, 2, 3, 0 },
115 { US"elifndef", 8, 3, 2, 0 },
116 { US"else", 4, 2, 2, 0 },
117 { US"endif", 5, 0, 0, -1 }
120 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
122 /* Table of syslog facility names and their values */
124 static syslog_fac_item syslog_list[] = {
125 { US"mail", LOG_MAIL },
126 { US"user", LOG_USER },
127 { US"news", LOG_NEWS },
128 { US"uucp", LOG_UUCP },
129 { US"local0", LOG_LOCAL0 },
130 { US"local1", LOG_LOCAL1 },
131 { US"local2", LOG_LOCAL2 },
132 { US"local3", LOG_LOCAL3 },
133 { US"local4", LOG_LOCAL4 },
134 { US"local5", LOG_LOCAL5 },
135 { US"local6", LOG_LOCAL6 },
136 { US"local7", LOG_LOCAL7 },
137 { US"daemon", LOG_DAEMON }
140 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
145 /*************************************************
146 * Main configuration options *
147 *************************************************/
149 /* The list of options that can be set in the main configuration file. This
150 must be in alphabetic order because it is searched by binary chop. */
152 static optionlist optionlist_config[] = {
153 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
154 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
155 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
156 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
157 { "accept_8bitmime", opt_bool, &accept_8bitmime },
158 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
159 #ifdef WITH_CONTENT_SCAN
160 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
162 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
163 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
164 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
165 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
167 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
170 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
172 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
173 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
174 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
175 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
176 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
177 #ifdef WITH_CONTENT_SCAN
178 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
180 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
181 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
182 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
183 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
185 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
187 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
188 { "add_environment", opt_stringptr, &add_environment },
189 { "admin_groups", opt_gidlist, &admin_groups },
190 { "allow_domain_literals", opt_bool, &allow_domain_literals },
191 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
192 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
193 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
194 { "auto_thaw", opt_time, &auto_thaw },
195 #ifdef WITH_CONTENT_SCAN
196 { "av_scanner", opt_stringptr, &av_scanner },
198 { "bi_command", opt_stringptr, &bi_command },
199 #ifdef EXPERIMENTAL_BRIGHTMAIL
200 { "bmi_config_file", opt_stringptr, &bmi_config_file },
202 { "bounce_message_file", opt_stringptr, &bounce_message_file },
203 { "bounce_message_text", opt_stringptr, &bounce_message_text },
204 { "bounce_return_body", opt_bool, &bounce_return_body },
205 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
206 { "bounce_return_message", opt_bool, &bounce_return_message },
207 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
208 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
209 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
210 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
211 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
212 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
213 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
214 { "check_log_inodes", opt_int, &check_log_inodes },
215 { "check_log_space", opt_Kint, &check_log_space },
216 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
217 { "check_spool_inodes", opt_int, &check_spool_inodes },
218 { "check_spool_space", opt_Kint, &check_spool_space },
219 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
220 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
221 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
222 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
223 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
224 #ifdef EXPERIMENTAL_DCC
225 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
226 { "dccifd_address", opt_stringptr, &dccifd_address },
227 { "dccifd_options", opt_stringptr, &dccifd_options },
229 { "delay_warning", opt_timelist, &delay_warning },
230 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
231 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
232 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
233 { "delivery_date_remove", opt_bool, &delivery_date_remove },
234 #ifdef ENABLE_DISABLE_FSYNC
235 { "disable_fsync", opt_bool, &disable_fsync },
237 { "disable_ipv6", opt_bool, &disable_ipv6 },
239 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
241 #ifdef EXPERIMENTAL_DMARC
242 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
243 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
244 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
246 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
247 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
248 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
249 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
250 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
251 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
252 { "dns_retrans", opt_time, &dns_retrans },
253 { "dns_retry", opt_int, &dns_retry },
254 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
255 { "dns_use_edns0", opt_int, &dns_use_edns0 },
256 /* This option is now a no-op, retained for compatibility */
257 { "drop_cr", opt_bool, &drop_cr },
258 /*********************************************************/
259 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
260 { "dsn_from", opt_stringptr, &dsn_from },
261 { "envelope_to_remove", opt_bool, &envelope_to_remove },
262 { "errors_copy", opt_stringptr, &errors_copy },
263 { "errors_reply_to", opt_stringptr, &errors_reply_to },
264 #ifndef DISABLE_EVENT
265 { "event_action", opt_stringptr, &event_action },
267 { "exim_group", opt_gid, &exim_gid },
268 { "exim_path", opt_stringptr, &exim_path },
269 { "exim_user", opt_uid, &exim_uid },
270 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
271 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
272 { "finduser_retries", opt_int, &finduser_retries },
273 { "freeze_tell", opt_stringptr, &freeze_tell },
274 { "gecos_name", opt_stringptr, &gecos_name },
275 { "gecos_pattern", opt_stringptr, &gecos_pattern },
277 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
278 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
280 { "header_line_maxsize", opt_int, &header_line_maxsize },
281 { "header_maxsize", opt_int, &header_maxsize },
282 { "headers_charset", opt_stringptr, &headers_charset },
283 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
284 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
285 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
286 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
287 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
288 { "hold_domains", opt_stringptr, &hold_domains },
289 { "host_lookup", opt_stringptr, &host_lookup },
290 { "host_lookup_order", opt_stringptr, &host_lookup_order },
291 { "host_reject_connection", opt_stringptr, &host_reject_connection },
292 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
294 { "hosts_proxy", opt_stringptr, &hosts_proxy },
296 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
298 { "ibase_servers", opt_stringptr, &ibase_servers },
300 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
301 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
302 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
303 { "keep_environment", opt_stringptr, &keep_environment },
304 { "keep_malformed", opt_time, &keep_malformed },
306 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
307 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
308 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
309 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
310 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
311 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
312 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
313 { "ldap_start_tls", opt_bool, &eldap_start_tls },
314 { "ldap_version", opt_int, &eldap_version },
316 { "local_from_check", opt_bool, &local_from_check },
317 { "local_from_prefix", opt_stringptr, &local_from_prefix },
318 { "local_from_suffix", opt_stringptr, &local_from_suffix },
319 { "local_interfaces", opt_stringptr, &local_interfaces },
320 { "local_scan_timeout", opt_time, &local_scan_timeout },
321 { "local_sender_retain", opt_bool, &local_sender_retain },
322 { "localhost_number", opt_stringptr, &host_number_string },
323 { "log_file_path", opt_stringptr, &log_file_path },
324 { "log_selector", opt_stringptr, &log_selector_string },
325 { "log_timezone", opt_bool, &log_timezone },
326 { "lookup_open_max", opt_int, &lookup_open_max },
327 { "max_username_length", opt_int, &max_username_length },
328 { "message_body_newlines", opt_bool, &message_body_newlines },
329 { "message_body_visible", opt_mkint, &message_body_visible },
330 { "message_id_header_domain", opt_stringptr, &message_id_domain },
331 { "message_id_header_text", opt_stringptr, &message_id_text },
332 { "message_logs", opt_bool, &message_logs },
333 { "message_size_limit", opt_stringptr, &message_size_limit },
334 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
335 { "move_frozen_messages", opt_bool, &move_frozen_messages },
337 { "mua_wrapper", opt_bool, &mua_wrapper },
339 { "mysql_servers", opt_stringptr, &mysql_servers },
341 { "never_users", opt_uidlist, &never_users },
343 { "openssl_options", opt_stringptr, &openssl_options },
346 { "oracle_servers", opt_stringptr, &oracle_servers },
348 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
350 { "perl_at_start", opt_bool, &opt_perl_at_start },
351 { "perl_startup", opt_stringptr, &opt_perl_startup },
352 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
355 { "pgsql_servers", opt_stringptr, &pgsql_servers },
357 { "pid_file_path", opt_stringptr, &pid_file_path },
358 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
360 { "prdr_enable", opt_bool, &prdr_enable },
362 { "preserve_message_logs", opt_bool, &preserve_message_logs },
363 { "primary_hostname", opt_stringptr, &primary_hostname },
364 { "print_topbitchars", opt_bool, &print_topbitchars },
365 { "process_log_path", opt_stringptr, &process_log_path },
366 { "prod_requires_admin", opt_bool, &prod_requires_admin },
367 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
368 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
369 { "queue_domains", opt_stringptr, &queue_domains },
370 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
371 { "queue_only", opt_bool, &queue_only },
372 { "queue_only_file", opt_stringptr, &queue_only_file },
373 { "queue_only_load", opt_fixed, &queue_only_load },
374 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
375 { "queue_only_override", opt_bool, &queue_only_override },
376 { "queue_run_in_order", opt_bool, &queue_run_in_order },
377 { "queue_run_max", opt_stringptr, &queue_run_max },
378 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
379 { "receive_timeout", opt_time, &receive_timeout },
380 { "received_header_text", opt_stringptr, &received_header_text },
381 { "received_headers_max", opt_int, &received_headers_max },
382 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
383 { "recipients_max", opt_int, &recipients_max },
384 { "recipients_max_reject", opt_bool, &recipients_max_reject },
386 { "redis_servers", opt_stringptr, &redis_servers },
388 { "remote_max_parallel", opt_int, &remote_max_parallel },
389 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
390 { "retry_data_expire", opt_time, &retry_data_expire },
391 { "retry_interval_max", opt_time, &retry_interval_max },
392 { "return_path_remove", opt_bool, &return_path_remove },
393 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
394 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
395 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
396 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
397 { "slow_lookup_log", opt_int, &slow_lookup_log },
398 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
399 { "smtp_accept_max", opt_int, &smtp_accept_max },
400 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
401 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
402 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
403 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
404 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
405 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
406 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
407 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
408 { "smtp_banner", opt_stringptr, &smtp_banner },
409 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
410 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
411 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
412 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
413 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
414 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
415 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
416 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
417 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
418 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
419 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
420 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
421 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
422 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
424 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
426 #ifdef WITH_CONTENT_SCAN
427 { "spamd_address", opt_stringptr, &spamd_address },
429 #ifdef EXPERIMENTAL_SPF
430 { "spf_guess", opt_stringptr, &spf_guess },
432 { "split_spool_directory", opt_bool, &split_spool_directory },
433 { "spool_directory", opt_stringptr, &spool_directory },
435 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
437 #ifdef EXPERIMENTAL_SRS
438 { "srs_config", opt_stringptr, &srs_config },
439 { "srs_hashlength", opt_int, &srs_hashlength },
440 { "srs_hashmin", opt_int, &srs_hashmin },
441 { "srs_maxage", opt_int, &srs_maxage },
442 { "srs_secrets", opt_stringptr, &srs_secrets },
443 { "srs_usehash", opt_bool, &srs_usehash },
444 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
446 { "strict_acl_vars", opt_bool, &strict_acl_vars },
447 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
448 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
449 { "syslog_duplication", opt_bool, &syslog_duplication },
450 { "syslog_facility", opt_stringptr, &syslog_facility_str },
451 { "syslog_pid", opt_bool, &syslog_pid },
452 { "syslog_processname", opt_stringptr, &syslog_processname },
453 { "syslog_timestamp", opt_bool, &syslog_timestamp },
454 { "system_filter", opt_stringptr, &system_filter },
455 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
456 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
457 { "system_filter_group", opt_gid, &system_filter_gid },
458 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
459 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
460 { "system_filter_user", opt_uid, &system_filter_uid },
461 { "tcp_nodelay", opt_bool, &tcp_nodelay },
462 #ifdef USE_TCP_WRAPPERS
463 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
465 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
466 { "timezone", opt_stringptr, &timezone_string },
467 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
469 { "tls_certificate", opt_stringptr, &tls_certificate },
470 { "tls_crl", opt_stringptr, &tls_crl },
471 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
472 { "tls_dhparam", opt_stringptr, &tls_dhparam },
473 { "tls_eccurve", opt_stringptr, &tls_eccurve },
474 # ifndef DISABLE_OCSP
475 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
477 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
478 { "tls_privatekey", opt_stringptr, &tls_privatekey },
479 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
480 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
481 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
482 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
483 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
485 { "trusted_groups", opt_gidlist, &trusted_groups },
486 { "trusted_users", opt_uidlist, &trusted_users },
487 { "unknown_login", opt_stringptr, &unknown_login },
488 { "unknown_username", opt_stringptr, &unknown_username },
489 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
490 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
491 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
492 { "warn_message_file", opt_stringptr, &warn_message_file },
493 { "write_rejectlog", opt_bool, &write_rejectlog }
496 static int optionlist_config_size = nelem(optionlist_config);
500 /*************************************************
501 * Find the name of an option *
502 *************************************************/
504 /* This function is to aid debugging. Various functions take arguments that are
505 pointer variables in the options table or in option tables for various drivers.
506 For debugging output, it is useful to be able to find the name of the option
507 which is currently being processed. This function finds it, if it exists, by
508 searching the table(s).
510 Arguments: a value that is presumed to be in the table above
511 Returns: the option name, or an empty string
515 readconf_find_option(void *p)
519 transport_instance *t;
521 for (i = 0; i < nelem(optionlist_config); i++)
522 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
524 for (r = routers; r; r = r->next)
526 router_info *ri = r->info;
527 for (i = 0; i < *ri->options_count; i++)
529 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
530 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
531 return US ri->options[i].name;
535 for (t = transports; t; t = t->next)
537 transport_info *ti = t->info;
538 for (i = 0; i < *ti->options_count; i++)
540 optionlist * op = &ti->options[i];
541 if ((op->type & opt_mask) != opt_stringptr) continue;
542 if (p == ( op->type & opt_public
544 : (char *)t->options_block
546 + (long int)op->value)
557 /*************************************************
558 * Deal with an assignment to a macro *
559 *************************************************/
561 /* We have a new definition. The macro_item structure includes a final vector
562 called "name" which is one byte long. Thus, adding "namelen" gives us enough
563 room to store the "name" string.
564 If a builtin macro we place at head of list, else tail. This lets us lazy-create
568 macro_create(const uschar * name, const uschar * val,
569 BOOL command_line, BOOL builtin)
571 unsigned namelen = Ustrlen(name);
572 macro_item * m = store_get(sizeof(macro_item) + namelen);
574 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val) */
592 m->command_line = command_line;
593 m->namelen = namelen;
594 m->replacement = string_copy(val);
595 Ustrcpy(m->name, name);
600 /* This function is called when a line that starts with an upper case letter is
601 encountered. The argument "line" should contain a complete logical line, and
602 start with the first letter of the macro name. The macro name and the
603 replacement text are extracted and stored. Redefinition of existing,
604 non-command line, macros is permitted using '==' instead of '='.
607 s points to the start of the logical line
613 read_macro_assignment(uschar *s)
620 while (isalnum(*s) || *s == '_')
622 if (namelen >= sizeof(name) - 1)
623 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
624 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
625 name[namelen++] = *s++;
629 while (isspace(*s)) s++;
631 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
638 while (isspace(*s)) s++;
640 /* If an existing macro of the same name was defined on the command line, we
641 just skip this definition. It's an error to attempt to redefine a macro without
642 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
643 It is also an error to define a macro whose name begins with the name of a
644 previously defined macro. This is the requirement that make using a tree
645 for macros hard; we must check all macros for the substring. Perhaps a
646 sorted list, and a bsearch, would work?
647 Note: it is documented that the other way round works. */
649 for (m = macros; m; m = m->next)
651 if (Ustrcmp(m->name, name) == 0)
653 if (!m->command_line && !redef)
654 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
655 "defined (use \"==\" if you want to redefine it", name);
659 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
660 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
661 "a macro because previously defined macro \"%s\" is a substring",
664 /* We cannot have this test, because it is documented that a substring
665 macro is permitted (there is even an example).
667 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
668 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
669 * "a macro because it is a substring of previously defined macro \"%s\"",
674 /* Check for an overriding command-line definition. */
676 if (m && m->command_line) return;
678 /* Redefinition must refer to an existing macro. */
682 m->replacement = string_copy(s);
684 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
687 /* We have a new definition. */
689 (void) macro_create(name, s, FALSE, FALSE);
696 /*************************************************/
697 /* Create compile-time feature macros */
699 readconf_features(void)
701 /* Probably we could work out a static initialiser for wherever
702 macros are stored, but this will do for now. Some names are awkward
703 due to conflicts with other common macros. */
705 #ifdef SUPPORT_CRYPTEQ
706 macro_create(US"_HAVE_CRYPTEQ", US"y", FALSE, TRUE);
709 macro_create(US"_HAVE_ICONV", US"y", FALSE, TRUE);
712 macro_create(US"_HAVE_IPV6", US"y", FALSE, TRUE);
714 #ifdef HAVE_SETCLASSRESOURCES
715 macro_create(US"_HAVE_SETCLASSRESOURCES", US"y", FALSE, TRUE);
718 macro_create(US"_HAVE_PAM", US"y", FALSE, TRUE);
721 macro_create(US"_HAVE_PERL", US"y", FALSE, TRUE);
724 macro_create(US"_HAVE_DLFUNC", US"y", FALSE, TRUE);
726 #ifdef USE_TCP_WRAPPERS
727 macro_create(US"_HAVE_TCPWRAPPERS", US"y", FALSE, TRUE);
730 macro_create(US"_HAVE_TLS", US"y", FALSE, TRUE);
732 macro_create(US"_HAVE_GNUTLS", US"y", FALSE, TRUE);
734 macro_create(US"_HAVE_OPENSSL", US"y", FALSE, TRUE);
737 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
738 macro_create(US"_HAVE_TRANSLATE_IP_ADDRESS", US"y", FALSE, TRUE);
740 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
741 macro_create(US"_HAVE_MOVE_FROZEN_MESSAGES", US"y", FALSE, TRUE);
743 #ifdef WITH_CONTENT_SCAN
744 macro_create(US"_HAVE_CONTENT_SCANNING", US"y", FALSE, TRUE);
747 macro_create(US"_HAVE_DKIM", US"y", FALSE, TRUE);
749 #ifndef DISABLE_DNSSEC
750 macro_create(US"_HAVE_DNSSEC", US"y", FALSE, TRUE);
752 #ifndef DISABLE_EVENT
753 macro_create(US"_HAVE_EVENT", US"y", FALSE, TRUE);
756 macro_create(US"_HAVE_I18N", US"y", FALSE, TRUE);
759 macro_create(US"_HAVE_OCSP", US"y", FALSE, TRUE);
762 macro_create(US"_HAVE_PRDR", US"y", FALSE, TRUE);
765 macro_create(US"_HAVE_PROXY", US"y", FALSE, TRUE);
768 macro_create(US"_HAVE_SOCKS", US"y", FALSE, TRUE);
771 macro_create(US"_HAVE_TCP_FASTOPEN", US"y", FALSE, TRUE);
773 #ifdef EXPERIMENTAL_LMDB
774 macro_create(US"_HAVE_LMDB", US"y", FALSE, TRUE);
776 #ifdef EXPERIMENTAL_SPF
777 macro_create(US"_HAVE_SPF", US"y", FALSE, TRUE);
779 #ifdef EXPERIMENTAL_SRS
780 macro_create(US"_HAVE_SRS", US"y", FALSE, TRUE);
782 #ifdef EXPERIMENTAL_BRIGHTMAIL
783 macro_create(US"_HAVE_BRIGHTMAIL", US"y", FALSE, TRUE);
785 #ifdef EXPERIMENTAL_DANE
786 macro_create(US"_HAVE_DANE", US"y", FALSE, TRUE);
788 #ifdef EXPERIMENTAL_DCC
789 macro_create(US"_HAVE_DCC", US"y", FALSE, TRUE);
791 #ifdef EXPERIMENTAL_DMARC
792 macro_create(US"_HAVE_DMARC", US"y", FALSE, TRUE);
794 #ifdef EXPERIMENTAL_DSN_INFO
795 macro_create(US"_HAVE_DSN_INFO", US"y", FALSE, TRUE);
798 #ifdef LOOKUP_LSEARCH
799 macro_create(US"_HAVE_LOOKUP_LSEARCH", US"y", FALSE, TRUE);
802 macro_create(US"_HAVE_LOOKUP_CDB", US"y", FALSE, TRUE);
805 macro_create(US"_HAVE_LOOKUP_DBM", US"y", FALSE, TRUE);
808 macro_create(US"_HAVE_LOOKUP_DNSDB", US"y", FALSE, TRUE);
810 #ifdef LOOKUP_DSEARCH
811 macro_create(US"_HAVE_LOOKUP_DSEARCH", US"y", FALSE, TRUE);
814 macro_create(US"_HAVE_LOOKUP_IBASE", US"y", FALSE, TRUE);
817 macro_create(US"_HAVE_LOOKUP_LDAP", US"y", FALSE, TRUE);
819 #ifdef EXPERIMENTAL_LMDB
820 macro_create(US"_HAVE_LOOKUP_LMDB", US"y", FALSE, TRUE);
823 macro_create(US"_HAVE_LOOKUP_MYSQL", US"y", FALSE, TRUE);
826 macro_create(US"_HAVE_LOOKUP_NIS", US"y", FALSE, TRUE);
828 #ifdef LOOKUP_NISPLUS
829 macro_create(US"_HAVE_LOOKUP_NISPLUS", US"y", FALSE, TRUE);
832 macro_create(US"_HAVE_LOOKUP_ORACLE", US"y", FALSE, TRUE);
835 macro_create(US"_HAVE_LOOKUP_PASSWD", US"y", FALSE, TRUE);
838 macro_create(US"_HAVE_LOOKUP_PGSQL", US"y", FALSE, TRUE);
841 macro_create(US"_HAVE_LOOKUP_REDIS", US"y", FALSE, TRUE);
844 macro_create(US"_HAVE_LOOKUP_SQLITE", US"y", FALSE, TRUE);
847 macro_create(US"_HAVE_LOOKUP_TESTDB", US"y", FALSE, TRUE);
850 macro_create(US"_HAVE_LOOKUP_WHOSON", US"y", FALSE, TRUE);
853 #ifdef TRANSPORT_APPENDFILE
854 # ifdef SUPPORT_MAILDIR
855 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILDIR", US"y", FALSE, TRUE);
857 # ifdef SUPPORT_MAILSTORE
858 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILSTORE", US"y", FALSE, TRUE);
861 macro_create(US"_HAVE_TRANSPORT_APPEND_MBX", US"y", FALSE, TRUE);
868 readconf_options_from_list(optionlist * opts, unsigned nopt, const uschar * section, uschar * group)
873 /* The 'previously-defined-substring' rule for macros in config file
874 lines is done so for these builtin macros: we know that the table
875 we source from is in strict alpha order, hence the builtins portion
876 of the macros list is in reverse-alpha (we prepend them) - so longer
877 macros that have substrings are always discovered first during
880 for (i = 0; i < nopt; i++) if (*(s = US opts[i].name) && *s != '*')
882 macro_create(string_sprintf("_OPT_%T_%T_%T", section, group, s), US"y", FALSE, TRUE);
884 macro_create(string_sprintf("_OPT_%T_%T", section, s), US"y", FALSE, TRUE);
889 readconf_options(void)
891 readconf_options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
892 readconf_options_routers();
893 readconf_options_transports();
894 readconf_options_auths();
898 macros_create_builtin(void)
902 macros_builtin_created = TRUE;
906 /*************************************************
907 * Read configuration line *
908 *************************************************/
910 /* A logical line of text is read from the configuration file into the big
911 buffer, taking account of macros, .includes, and continuations. The size of
912 big_buffer is increased if necessary. The count of configuration lines is
913 maintained. Physical input lines starting with # (ignoring leading white space,
914 and after macro replacement) and empty logical lines are always ignored.
915 Leading and trailing spaces are removed.
917 If we hit a line of the form "begin xxxx", the xxxx is placed in the
918 next_section vector, and the function returns NULL, indicating the end of a
919 configuration section. On end-of-file, NULL is returned with next_section
924 Returns: a pointer to the first non-blank in the line,
925 or NULL if eof or end of section is reached
929 get_config_line(void)
931 int startoffset = 0; /* To first non-blank char in logical line */
932 int len = 0; /* Of logical line so far */
938 /* Loop for handling continuation lines, skipping comments, and dealing with
943 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
945 if (config_file_stack != NULL) /* EOF inside .include */
947 (void)fclose(config_file);
948 config_file = config_file_stack->file;
949 config_filename = config_file_stack->filename;
950 config_directory = config_file_stack->directory;
951 config_lineno = config_file_stack->lineno;
952 config_file_stack = config_file_stack->next;
954 save_config_position(config_filename, config_lineno);
958 /* EOF at top level */
960 if (cstate_stack_ptr >= 0)
961 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
962 "Unexpected end of configuration file: .endif missing");
964 if (len != 0) break; /* EOF after continuation */
965 next_section[0] = 0; /* EOF at start of logical line */
970 newlen = len + Ustrlen(big_buffer + len);
972 if (config_lines && config_lineno == 1)
973 save_config_position(config_filename, config_lineno);
975 /* Handle pathologically long physical lines - yes, it did happen - by
976 extending big_buffer at this point. The code also copes with very long
979 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
982 big_buffer_size += BIG_BUFFER_SIZE;
983 newbuffer = store_malloc(big_buffer_size);
985 /* This use of strcpy is OK because we know that the string in the old
986 buffer is shorter than the new buffer. */
988 Ustrcpy(newbuffer, big_buffer);
989 store_free(big_buffer);
990 big_buffer = newbuffer;
991 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
993 newlen += Ustrlen(big_buffer + newlen);
996 /* Find the true start of the physical line - leading spaces are always
999 ss = big_buffer + len;
1000 while (isspace(*ss)) ss++;
1002 /* Process the physical line for macros. If this is the start of the logical
1003 line, skip over initial text at the start of the line if it starts with an
1004 upper case character followed by a sequence of name characters and an equals
1005 sign, because that is the definition of a new macro, and we don't do
1006 replacement therein. */
1009 if (len == 0 && isupper(*s))
1011 while (isalnum(*s) || *s == '_') s++;
1012 while (isspace(*s)) s++;
1013 if (*s != '=') s = ss; /* Not a macro definition */
1016 /* If the builtin macros are not yet defined, and the line contains an
1017 underscrore followed by an one of the three possible chars used by
1018 builtins, create them. */
1020 if (!macros_builtin_created)
1022 const uschar * t, * p;
1024 for (t = s; (p = CUstrchr(t, '_')); t = p+1)
1025 if (c = p[1], c == 'O' || c == 'D' || c == 'H')
1027 /* fprintf(stderr, "%s: builtins create triggered by '%s'\n", __FUNCTION__, s); */
1028 macros_create_builtin();
1033 /* For each defined macro, scan the line (from after XXX= if present),
1034 replacing all occurrences of the macro. */
1036 macro_found = FALSE;
1037 for (m = macros; m; m = m->next)
1042 while ((p = Ustrstr(t, m->name)) != NULL)
1045 int replen = Ustrlen(m->replacement);
1047 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, t) */
1048 /* Expand the buffer if necessary */
1050 while (newlen - m->namelen + replen + 1 > big_buffer_size)
1052 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
1053 uschar *newbuffer = store_malloc(newsize);
1054 memcpy(newbuffer, big_buffer, newlen + 1);
1055 p = newbuffer + (p - big_buffer);
1056 s = newbuffer + (s - big_buffer);
1057 ss = newbuffer + (ss - big_buffer);
1058 t = newbuffer + (t - big_buffer);
1059 big_buffer_size = newsize;
1060 store_free(big_buffer);
1061 big_buffer = newbuffer;
1064 /* Shuffle the remaining characters up or down in the buffer before
1065 copying in the replacement text. Don't rescan the replacement for this
1068 pp = p + m->namelen;
1069 if ((moveby = replen - m->namelen) != 0)
1071 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
1074 Ustrncpy(p, m->replacement, replen);
1080 /* An empty macro replacement at the start of a line could mean that ss no
1081 longer points to the first non-blank character. */
1083 while (isspace(*ss)) ss++;
1085 /* Check for comment lines - these are physical lines. */
1087 if (*ss == '#') continue;
1089 /* Handle conditionals, which are also applied to physical lines. Conditions
1090 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1091 expansion occured on the rest of the line. A preliminary test for the leading
1092 '.' saves effort on most lines. */
1098 /* Search the list of conditional directives */
1100 for (i = 0; i < cond_list_size; i++)
1103 cond_item *c = cond_list+i;
1104 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1106 /* The following character must be white space or end of string */
1108 n = ss[1 + c->namelen];
1109 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1111 /* .ifdef and .ifndef push the current state onto the stack, then set
1112 a new one from the table. Stack overflow is an error */
1116 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1117 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1118 ".%s nested too deeply", c->name);
1119 cstate_stack[++cstate_stack_ptr] = cstate;
1120 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1123 /* For any of the others, stack underflow is an error. The next state
1124 comes either from the stack (.endif) or from the table. */
1128 if (cstate_stack_ptr < 0)
1129 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1130 ".%s without matching .ifdef", c->name);
1131 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1132 next_cstate[cstate][macro_found? c->action1 : c->action2];
1135 /* Having dealt with a directive, break the loop */
1140 /* If we have handled a conditional directive, continue with the next
1141 physical line. Otherwise, fall through. */
1143 if (i < cond_list_size) continue;
1146 /* If the conditional state is not 0 (actively using these lines), ignore
1149 if (cstate != 0) continue; /* Conditional skip */
1151 /* Handle .include lines - these are also physical lines. */
1153 if (Ustrncmp(ss, ".include", 8) == 0 &&
1155 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1158 int include_if_exists = isspace(ss[8])? 0 : 10;
1159 config_file_item *save;
1160 struct stat statbuf;
1162 ss += 9 + include_if_exists;
1163 while (isspace(*ss)) ss++;
1164 t = ss + Ustrlen(ss);
1165 while (t > ss && isspace(t[-1])) t--;
1166 if (*ss == '\"' && t[-1] == '\"')
1173 /* We allow relative file names. For security reasons currently
1174 relative names not allowed with .include_if_exists. For .include_if_exists
1175 we need to check the permissions/ownership of the containing folder */
1177 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1178 "absolute path \"%s\"", ss);
1183 ss = string_append(NULL, &size, &offset, 3, config_directory, "/", ss);
1184 ss[offset] = '\0'; /* string_append() does not zero terminate the string! */
1187 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1190 save_config_position(config_filename, config_lineno);
1191 save = store_get(sizeof(config_file_item));
1192 save->next = config_file_stack;
1193 config_file_stack = save;
1194 save->file = config_file;
1195 save->filename = config_filename;
1196 save->directory = config_directory;
1197 save->lineno = config_lineno;
1199 if (!(config_file = Ufopen(ss, "rb")))
1200 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1201 "configuration file %s", ss);
1203 config_filename = string_copy(ss);
1204 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1209 /* If this is the start of the logical line, remember where the non-blank
1210 data starts. Otherwise shuffle down continuation lines to remove leading
1214 startoffset = ss - big_buffer;
1217 s = big_buffer + len;
1220 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1225 /* Accept the new addition to the line. Remove trailing white space. */
1228 while (len > 0 && isspace(big_buffer[len-1])) len--;
1229 big_buffer[len] = 0;
1231 /* We are done if the line does not end in backslash and contains some data.
1232 Empty logical lines are ignored. For continuations, remove the backslash and
1233 go round the loop to read the continuation line. */
1237 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1238 big_buffer[--len] = 0; /* Remove backslash */
1240 } /* Loop for reading multiple physical lines */
1242 /* We now have a logical line. Test for the end of a configuration section (or,
1243 more accurately, for the start of the next section). Place the name of the next
1244 section in next_section, and return NULL. If the name given is longer than
1245 next_section, truncate it. It will be unrecognized later, because all the known
1246 section names do fit. Leave space for pluralizing. */
1248 s = big_buffer + startoffset; /* First non-space character */
1251 save_config_line(s);
1253 if (strncmpic(s, US"begin ", 6) == 0)
1256 while (isspace(*s)) s++;
1257 if (big_buffer + len - s > sizeof(next_section) - 2)
1258 s[sizeof(next_section) - 2] = 0;
1259 Ustrcpy(next_section, s);
1263 /* Return the first non-blank character. */
1270 /*************************************************
1272 *************************************************/
1274 /* The yield is the pointer to the next uschar. Names longer than the
1275 output space are silently truncated. This function is also used from acl.c when
1279 name where to put the name
1283 Returns: new input pointer
1287 readconf_readname(uschar *name, int len, uschar *s)
1290 while (isspace(*s)) s++;
1293 while (isalnum(*s) || *s == '_')
1295 if (p < len-1) name[p++] = *s;
1300 while (isspace(*s)) s++;
1307 /*************************************************
1308 * Read a time value *
1309 *************************************************/
1311 /* This function is also called from outside, to read argument
1312 time values. The format of a time value is:
1314 [<n>w][<n>d][<n>h][<n>m][<n>s]
1316 as long as at least one is present. If a format error is encountered,
1317 return a negative value. The value must be terminated by the given
1322 terminator required terminating character
1323 return_msec if TRUE, allow fractional seconds and return milliseconds
1325 Returns: the time value, or -1 on syntax error
1326 value is seconds if return_msec is FALSE
1327 value is milliseconds if return_msec is TRUE
1331 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1339 if (!isdigit(*s)) return -1;
1340 (void)sscanf(CCS s, "%d%n", &value, &count);
1345 case 'w': value *= 7;
1346 case 'd': value *= 24;
1347 case 'h': value *= 60;
1348 case 'm': value *= 60;
1353 if (!return_msec) return -1;
1354 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1356 if (*s++ != 's') return -1;
1357 yield += (int)(fraction * 1000.0);
1363 if (return_msec) value *= 1000;
1365 if (*s == terminator) return yield;
1367 /* Control never reaches here. */
1372 /*************************************************
1373 * Read a fixed point value *
1374 *************************************************/
1376 /* The value is returned *1000
1380 terminator required terminator
1382 Returns: the value, or -1 on error
1386 readconf_readfixed(const uschar *s, int terminator)
1390 if (!isdigit(*s)) return -1;
1391 (void)sscanf(CS s, "%d%n", &value, &count);
1393 yield = value * 1000;
1397 while (isdigit((*(++s))))
1399 yield += (*s - '0') * m;
1404 return (*s == terminator)? yield : (-1);
1409 /*************************************************
1410 * Find option in list *
1411 *************************************************/
1413 /* The lists are always in order, so binary chop can be used.
1416 name the option name to search for
1417 ol the first entry in the option list
1418 last one more than the offset of the last entry in the option list
1420 Returns: pointer to an option entry, or NULL if not found
1424 find_option(uschar *name, optionlist *ol, int last)
1427 while (last > first)
1429 int middle = (first + last)/2;
1430 int c = Ustrcmp(name, ol[middle].name);
1432 if (c == 0) return ol + middle;
1433 else if (c > 0) first = middle + 1;
1441 /*************************************************
1442 * Find a set flag in option list *
1443 *************************************************/
1445 /* Because some versions of Unix make no restrictions on the values of uids and
1446 gids (even negative ones), we cannot represent "unset" by a special value.
1447 There is therefore a separate boolean variable for each one indicating whether
1448 a value is set or not. This function returns a pointer to the boolean, given
1449 the original option name. It is a major disaster if the flag cannot be found.
1452 name the name of the uid or gid option
1453 oltop points to the start of the relevant option list
1454 last one more than the offset of the last item in the option list
1455 data_block NULL when reading main options => data values in the option
1456 list are absolute addresses; otherwise they are byte offsets
1457 in data_block (used for driver options)
1459 Returns: a pointer to the boolean flag.
1463 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1467 sprintf(CS name2, "*set_%.50s", name);
1468 ol = find_option(name2, oltop, last);
1469 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1470 "Exim internal error: missing set flag for %s", name);
1471 return (data_block == NULL)? (BOOL *)(ol->value) :
1472 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1478 /*************************************************
1479 * Output extra characters message and die *
1480 *************************************************/
1482 /* Called when an option line has junk on the end. Sometimes this is because
1483 the sysadmin thinks comments are permitted.
1486 s points to the extra characters
1487 t1..t3 strings to insert in the log message
1489 Returns: doesn't return; dies
1493 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1495 uschar *comment = US"";
1496 if (*s == '#') comment = US" (# is comment only at line start)";
1497 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1498 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1503 /*************************************************
1504 * Read rewrite information *
1505 *************************************************/
1507 /* Each line of rewrite information contains:
1509 . A complete address in the form user@domain, possibly with
1510 leading * for each part; or alternatively, a regex.
1512 . A replacement string (which will be expanded).
1514 . An optional sequence of one-letter flags, indicating which
1515 headers etc. to apply this rule to.
1517 All this is decoded and placed into a control block. The OR of the flags is
1518 maintained in a common word.
1521 p points to the string that makes up the rule
1522 existflags points to the overall flag word
1523 isglobal TRUE if reading global rewrite rules
1525 Returns: the control block for the parsed rule.
1528 static rewrite_rule *
1529 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1531 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1534 next->key = string_dequote(&p);
1536 while (isspace(*p)) p++;
1538 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1539 "missing rewrite replacement string");
1542 next->replacement = string_dequote(&p);
1544 while (*p != 0) switch (*p++)
1546 case ' ': case '\t': break;
1548 case 'q': next->flags |= rewrite_quit; break;
1549 case 'w': next->flags |= rewrite_whole; break;
1551 case 'h': next->flags |= rewrite_all_headers; break;
1552 case 's': next->flags |= rewrite_sender; break;
1553 case 'f': next->flags |= rewrite_from; break;
1554 case 't': next->flags |= rewrite_to; break;
1555 case 'c': next->flags |= rewrite_cc; break;
1556 case 'b': next->flags |= rewrite_bcc; break;
1557 case 'r': next->flags |= rewrite_replyto; break;
1559 case 'E': next->flags |= rewrite_all_envelope; break;
1560 case 'F': next->flags |= rewrite_envfrom; break;
1561 case 'T': next->flags |= rewrite_envto; break;
1563 case 'Q': next->flags |= rewrite_qualify; break;
1564 case 'R': next->flags |= rewrite_repeat; break;
1567 next->flags |= rewrite_smtp;
1568 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1569 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1570 "rewrite rule has the S flag but is not a regular expression");
1574 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1575 "unknown rewrite flag character '%c' "
1576 "(could be missing quotes round replacement item)", p[-1]);
1580 /* If no action flags are set, set all the "normal" rewrites. */
1582 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1583 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1585 /* Remember which exist, for optimization, and return the rule */
1587 *existflags |= next->flags;
1594 /*************************************************
1595 * Read global rewrite information *
1596 *************************************************/
1598 /* Each line is a single rewrite rule; it is parsed into a control block
1599 by readconf_one_rewrite(), and its flags are ORed into the global flag
1600 word rewrite_existflags. */
1603 readconf_rewrites(void)
1605 rewrite_rule **chain = &global_rewrite_rules;
1608 while ((p = get_config_line()) != NULL)
1610 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1612 chain = &(next->next);
1618 /*************************************************
1620 *************************************************/
1622 /* Strings are read into the normal store pool. As long we aren't too
1623 near the end of the current block, the string will just use what is necessary
1624 on the top of the stacking pool, because string_cat() uses the extension
1628 s the rest of the input line
1629 name the option name (for errors)
1631 Returns: pointer to the string
1635 read_string(const uschar *s, const uschar *name)
1640 if (*s != '\"') return string_copy(s);
1643 yield = string_dequote(&s);
1645 if (s == ss+1 || s[-1] != '\"')
1646 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1647 "missing quote at end of string value for %s", name);
1649 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1655 /*************************************************
1656 * Custom-handler options *
1657 *************************************************/
1659 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1662 smtp_receive_timeout_s = string_copy(str);
1665 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1666 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1667 if (smtp_receive_timeout < 0)
1668 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1673 /*************************************************
1674 * Handle option line *
1675 *************************************************/
1677 /* This function is called from several places to process a line containing the
1678 setting of an option. The first argument is the line to be decoded; it has been
1679 checked not to be empty and not to start with '#'. Trailing newlines and white
1680 space have been removed. The second argument is a pointer to the list of
1681 variable names that are to be recognized, together with their types and
1682 locations, and the third argument gives the number of entries in the list.
1684 The fourth argument is a pointer to a data block. If it is NULL, then the data
1685 values in the options list are absolute addresses. Otherwise, they are byte
1686 offsets in the data block.
1688 String option data may continue onto several lines; this function reads further
1689 data from config_file if necessary.
1691 The yield of this function is normally zero. If a string continues onto
1692 multiple lines, then the data value is permitted to be followed by a comma
1693 or a semicolon (for use in drivers) and the yield is that character.
1696 buffer contains the configuration line to be handled
1697 oltop points to the start of the relevant option list
1698 last one more than the offset of the last item in the option list
1699 data_block NULL when reading main options => data values in the option
1700 list are absolute addresses; otherwise they are byte offsets
1701 in data_block when they have opt_public set; otherwise
1702 they are byte offsets in data_block->options_block.
1703 unknown_txt format string to use in panic message for unknown option;
1704 must contain %s for option name
1705 if given as NULL, don't panic on unknown option
1707 Returns: TRUE if an option was read successfully,
1708 FALSE false for an unknown option if unknown_txt == NULL,
1709 otherwise panic and die on an unknown option
1713 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1714 void *data_block, uschar *unknown_txt)
1718 int n, count, type, value;
1722 BOOL boolvalue = TRUE;
1723 BOOL freesptr = TRUE;
1724 optionlist *ol, *ol2;
1728 uschar *inttype = US"";
1731 uschar **str_target;
1735 /* There may be leading spaces; thereafter, we expect an option name starting
1738 while (isspace(*s)) s++;
1740 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1742 /* Read the name of the option, and skip any subsequent white space. If
1743 it turns out that what we read was "hide", set the flag indicating that
1744 this is a secure option, and loop to read the next word. */
1746 for (n = 0; n < 2; n++)
1748 while (isalnum(*s) || *s == '_')
1750 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1754 while (isspace(*s)) s++;
1755 if (Ustrcmp(name, "hide") != 0) break;
1756 issecure = opt_secure;
1760 /* Deal with "no_" or "not_" here for booleans */
1762 if (Ustrncmp(name, "no_", 3) == 0)
1768 if (Ustrncmp(name, "not_", 4) == 0)
1774 /* Search the list for the given name. A non-existent name, or an option that
1775 is set twice, is a disaster. */
1777 if (!(ol = find_option(name + offset, oltop, last)))
1779 if (unknown_txt == NULL) return FALSE;
1780 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1783 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1784 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1785 "\"%s\" option set for the second time", name);
1787 ol->type |= opt_set | issecure;
1788 type = ol->type & opt_mask;
1790 /* Types with data values must be followed by '='; the "no[t]_" prefix
1791 applies only to boolean values. */
1793 if (type < opt_bool || type > opt_bool_last)
1796 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1797 "negation prefix applied to a non-boolean option");
1799 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1800 "unexpected end of line (data missing) after %s", name);
1802 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1805 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1806 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1807 ultimately expands to one of those values. */
1809 else if (*s != 0 && (offset != 0 || *s != '='))
1810 extra_chars_error(s, US"boolean option ", name, US"");
1812 /* Skip white space after = */
1814 if (*s == '=') while (isspace((*(++s))));
1816 /* If there is a data block and the opt_public flag is not set, change
1817 the data block pointer to the private options block. */
1819 if (data_block != NULL && (ol->type & opt_public) == 0)
1820 data_block = (void *)(((driver_instance *)data_block)->options_block);
1822 /* Now get the data according to the type. */
1826 /* If a string value is not enclosed in quotes, it consists of
1827 the rest of the current line, verbatim. Otherwise, string escapes
1830 A transport is specified as a string, which is then looked up in the
1831 list of transports. A search type is specified as one of a number of
1834 A set or rewrite rules for a driver is specified as a string, which is
1835 then parsed into a suitable chain of control blocks.
1837 Uids and gids are specified as strings which are then looked up in the
1838 passwd file. Lists of uids and gids are similarly specified as colon-
1839 separated strings. */
1844 case opt_expand_uid:
1845 case opt_expand_gid:
1850 reset_point = sptr = read_string(s, name);
1852 /* Having read a string, we now have several different ways of using it,
1853 depending on the data type, so do another switch. If keeping the actual
1854 string is not required (because it is interpreted), freesptr is set TRUE,
1855 and at the end we reset the pool. */
1859 /* If this was a string, set the variable to point to the new string,
1860 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1861 rules, we still keep the string (for printing), and parse the rules into a
1862 control block and flags word. */
1865 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1867 if (ol->type & opt_rep_con)
1869 uschar * saved_condition;
1870 /* We already have a condition, we're conducting a crude hack to let
1871 multiple condition rules be chained together, despite storing them in
1873 *str_target = string_copy_malloc( (saved_condition = *str_target)
1874 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1875 saved_condition, sptr)
1877 /* TODO(pdp): there is a memory leak here and just below
1878 when we set 3 or more conditions; I still don't
1879 understand the store mechanism enough to know
1880 what's the safe way to free content from an earlier store.
1881 AFAICT, stores stack, so freeing an early stored item also stores
1882 all data alloc'd after it. If we knew conditions were adjacent,
1883 we could survive that, but we don't. So I *think* we need to take
1884 another bit from opt_type to indicate "malloced"; this seems like
1885 quite a hack, especially for this one case. It also means that
1886 we can't ever reclaim the store from the *first* condition.
1888 Because we only do this once, near process start-up, I'm prepared to
1889 let this slide for the time being, even though it rankles. */
1891 else if (ol->type & opt_rep_str)
1893 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1894 int sep_i = -(int)sep_o;
1895 const uschar * list = sptr;
1897 uschar * list_o = *str_target;
1899 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1900 list_o = string_append_listele(list_o, sep_o, s);
1902 *str_target = string_copy_malloc(list_o);
1913 *USS (US data_block + (long int)(ol->value)) = sptr;
1915 *USS (ol->value) = sptr;
1917 if (type == opt_rewrite)
1922 rewrite_rule **chain;
1925 sprintf(CS name2, "*%.50s_rules", name);
1926 ol2 = find_option(name2, oltop, last);
1927 sprintf(CS name2, "*%.50s_flags", name);
1928 ol3 = find_option(name2, oltop, last);
1930 if (ol2 == NULL || ol3 == NULL)
1931 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1932 "rewrite rules not available for driver");
1934 if (data_block == NULL)
1936 chain = (rewrite_rule **)(ol2->value);
1937 flagptr = (int *)(ol3->value);
1941 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1942 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1945 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1947 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1949 chain = &(next->next);
1952 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1953 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1954 "non-header rewrite - not allowed at transport time -");
1958 /* If it was an expanded uid, see if there is any expansion to be
1959 done by checking for the presence of a $ character. If there is, save it
1960 in the corresponding *expand_user option field. Otherwise, fall through
1961 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1964 case opt_expand_uid:
1965 sprintf(CS name2, "*expand_%.50s", name);
1966 ol2 = find_option(name2, oltop, last);
1969 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1971 if (data_block == NULL)
1972 *((uschar **)(ol2->value)) = ss;
1974 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1978 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1984 /* Look up a fixed uid, and also make use of the corresponding gid
1985 if a passwd entry is returned and the gid has not been set. */
1988 if (!route_finduser(sptr, &pw, &uid))
1989 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1990 if (data_block == NULL)
1991 *((uid_t *)(ol->value)) = uid;
1993 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1995 /* Set the flag indicating a fixed value is set */
1997 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1999 /* Handle matching gid if we have a passwd entry: done by finding the
2000 same name with terminating "user" changed to "group"; if not found,
2001 ignore. Also ignore if the value is already set. */
2003 if (pw == NULL) break;
2004 Ustrcpy(name+Ustrlen(name)-4, "group");
2005 ol2 = find_option(name, oltop, last);
2006 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
2007 (ol2->type & opt_mask) == opt_expand_gid))
2009 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
2012 if (data_block == NULL)
2013 *((gid_t *)(ol2->value)) = pw->pw_gid;
2015 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
2021 /* If it was an expanded gid, see if there is any expansion to be
2022 done by checking for the presence of a $ character. If there is, save it
2023 in the corresponding *expand_user option field. Otherwise, fall through
2024 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
2027 case opt_expand_gid:
2028 sprintf(CS name2, "*expand_%.50s", name);
2029 ol2 = find_option(name2, oltop, last);
2032 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
2034 if (data_block == NULL)
2035 *((uschar **)(ol2->value)) = ss;
2037 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
2041 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2047 /* Handle freestanding gid */
2050 if (!route_findgroup(sptr, &gid))
2051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2052 if (data_block == NULL)
2053 *((gid_t *)(ol->value)) = gid;
2055 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
2056 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2059 /* If it was a uid list, look up each individual entry, and build
2060 a vector of uids, with a count in the first element. Put the vector
2061 in malloc store so we can free the string. (We are reading into
2062 permanent store already.) */
2070 const uschar *op = expand_string (sptr);
2073 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2074 name, expand_string_message);
2077 if (*p != 0) count++;
2078 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2079 list = store_malloc(count*sizeof(uid_t));
2080 list[ptr++] = (uid_t)(count - 1);
2082 if (data_block == NULL)
2083 *((uid_t **)(ol->value)) = list;
2085 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2091 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2092 if (!route_finduser(big_buffer, NULL, &uid))
2093 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2100 /* If it was a gid list, look up each individual entry, and build
2101 a vector of gids, with a count in the first element. Put the vector
2102 in malloc store so we can free the string. (We are reading into permanent
2111 const uschar *op = expand_string (sptr);
2114 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2115 name, expand_string_message);
2118 if (*p != 0) count++;
2119 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2120 list = store_malloc(count*sizeof(gid_t));
2121 list[ptr++] = (gid_t)(count - 1);
2123 if (data_block == NULL)
2124 *((gid_t **)(ol->value)) = list;
2126 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2132 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2133 if (!route_findgroup(big_buffer, &gid))
2134 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2142 /* Release store if the value of the string doesn't need to be kept. */
2144 if (freesptr) store_reset(reset_point);
2147 /* Expanded boolean: if no characters follow, or if there are no dollar
2148 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2149 save the string for later expansion in the alternate place. */
2151 case opt_expand_bool:
2152 if (*s != 0 && Ustrchr(s, '$') != 0)
2154 sprintf(CS name2, "*expand_%.50s", name);
2155 ol2 = find_option(name2, oltop, last);
2158 reset_point = sptr = read_string(s, name);
2159 if (data_block == NULL)
2160 *((uschar **)(ol2->value)) = sptr;
2162 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
2169 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2170 look for yes/not/true/false. Some booleans are stored in a single bit in
2171 a single int. There's a special fudge for verify settings; without a suffix
2172 they set both xx_sender and xx_recipient. The table points to the sender
2173 value; search subsequently for the recipient. There's another special case:
2174 opt_bool_set also notes when a boolean has been set. */
2178 case opt_bool_verify:
2182 s = readconf_readname(name2, 64, s);
2183 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2185 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2187 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2188 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2189 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2190 US"for boolean option ", name);
2193 /* Handle single-bit type. */
2195 if (type == opt_bit)
2197 int bit = 1 << ((ol->type >> 16) & 31);
2198 int *ptr = (data_block == NULL)?
2199 (int *)(ol->value) :
2200 (int *)((uschar *)data_block + (long int)ol->value);
2201 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2205 /* Handle full BOOL types */
2207 if (data_block == NULL)
2208 *((BOOL *)(ol->value)) = boolvalue;
2210 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
2214 if (type == opt_bool_verify)
2216 sprintf(CS name2, "%.50s_recipient", name + offset);
2217 ol2 = find_option(name2, oltop, last);
2220 if (data_block == NULL)
2221 *((BOOL *)(ol2->value)) = boolvalue;
2223 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
2227 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2229 else if (type == opt_bool_set)
2231 sprintf(CS name2, "*set_%.50s", name + offset);
2232 ol2 = find_option(name2, oltop, last);
2235 if (data_block == NULL)
2236 *((BOOL *)(ol2->value)) = TRUE;
2238 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
2247 inttype = US"octal ";
2249 /* Integer: a simple(ish) case; allow octal and hex formats, and
2250 suffixes K, M and G. The different types affect output, not input. */
2259 lvalue = strtol(CS s, CSS &endptr, intbase);
2262 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2265 if (errno != ERANGE)
2266 if (tolower(*endptr) == 'k')
2268 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2269 else lvalue *= 1024;
2272 else if (tolower(*endptr) == 'm')
2274 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2276 else lvalue *= 1024*1024;
2279 else if (tolower(*endptr) == 'g')
2281 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2283 else lvalue *= 1024*1024*1024;
2287 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2288 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2289 "absolute value of integer \"%s\" is too large (overflow)", s);
2291 while (isspace(*endptr)) endptr++;
2293 extra_chars_error(endptr, inttype, US"integer value for ", name);
2295 value = (int)lvalue;
2298 if (data_block == NULL)
2299 *((int *)(ol->value)) = value;
2301 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2304 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2306 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2312 value = strtol(CS s, CSS &endptr, intbase);
2315 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2318 if (errno != ERANGE)
2319 if (tolower(*endptr) == 'g')
2321 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2327 else if (tolower(*endptr) == 'm')
2329 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2335 else if (tolower(*endptr) == 'k')
2338 value = (value + 512)/1024;
2340 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2341 "absolute value of integer \"%s\" is too large (overflow)", s);
2343 while (isspace(*endptr)) endptr++;
2345 extra_chars_error(endptr, inttype, US"integer value for ", name);
2348 if (data_block == NULL)
2349 *((int *)(ol->value)) = value;
2351 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2354 /* Fixed-point number: held to 3 decimal places. */
2357 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2358 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2359 "fixed-point number expected for %s", name);
2361 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2362 "integer \"%s\" is too large (overflow)", s);
2366 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2367 "integer \"%s\" is too large (overflow)", s);
2369 /* We get a coverity error here for using count, as it derived
2370 from the tainted buffer pointed to by s, as parsed by sscanf().
2371 By the definition of sscanf we must be accessing between start
2372 and end of s (assuming it is nul-terminated...) so ignore the error. */
2373 /* coverity[tainted_data] */
2374 if (s[count] == '.')
2377 while (isdigit(s[++count]))
2379 value += (s[count] - '0') * d;
2384 while (isspace(s[count])) count++;
2387 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2389 if (data_block == NULL)
2390 *((int *)(ol->value)) = value;
2392 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2395 /* There's a special routine to read time values. */
2398 value = readconf_readtime(s, 0, FALSE);
2400 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2402 if (data_block == NULL)
2403 *((int *)(ol->value)) = value;
2405 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2408 /* A time list is a list of colon-separated times, with the first
2409 element holding the size of the list and the second the number of
2415 int *list = (data_block == NULL)?
2416 (int *)(ol->value) :
2417 (int *)((uschar *)data_block + (long int)(ol->value));
2419 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2422 uschar *snext = Ustrchr(s, ':');
2426 while (ss > s && isspace(ss[-1])) ss--;
2429 value = readconf_readtime(s, terminator, FALSE);
2431 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2433 if (count > 1 && value <= list[count])
2434 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2435 "time value out of order for %s", name);
2436 list[count+1] = value;
2437 if (snext == NULL) break;
2439 while (isspace(*s)) s++;
2442 if (count > list[0] - 2)
2443 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2445 if (count > 0 && list[2] == 0) count = 0;
2452 void (*fn)() = ol->value;
2463 /*************************************************
2464 * Print a time value *
2465 *************************************************/
2468 Argument: a time value in seconds
2469 Returns: pointer to a fixed buffer containing the time as a string,
2470 in readconf_readtime() format
2474 readconf_printtime(int t)
2477 uschar *p = time_buffer;
2494 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2495 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2496 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2497 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2498 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2505 /*************************************************
2506 * Print an individual option value *
2507 *************************************************/
2509 /* This is used by the -bP option, so prints to the standard output.
2510 The entire options list is passed in as an argument, because some options come
2511 in pairs - typically uid/gid settings, which can either be explicit numerical
2512 values, or strings to be expanded later. If the numerical value is unset,
2513 search for "*expand_<name>" to see if there is a string equivalent.
2516 ol option entry, or NULL for an unknown option
2518 options_block NULL for main configuration options; otherwise points to
2519 a driver block; if the option doesn't have opt_public
2520 set, then options_block->options_block is where the item
2522 oltop points to the option list in which ol exists
2523 last one more than the offset of the last entry in optop
2524 no_labels do not show "foo = " at the start.
2530 print_ol(optionlist *ol, uschar *name, void *options_block,
2531 optionlist *oltop, int last, BOOL no_labels)
2544 printf("%s is not a known option\n", name);
2548 /* Non-admin callers cannot see options that have been flagged secure by the
2551 if (!admin_user && (ol->type & opt_secure) != 0)
2554 printf("%s\n", hidden);
2556 printf("%s = %s\n", name, hidden);
2560 /* Else show the value of the option */
2563 if (options_block != NULL)
2565 if ((ol->type & opt_public) == 0)
2566 options_block = (void *)(((driver_instance *)options_block)->options_block);
2567 value = (void *)((uschar *)options_block + (long int)value);
2570 switch(ol->type & opt_mask)
2573 case opt_rewrite: /* Show the text value */
2574 s = *((uschar **)value);
2575 if (!no_labels) printf("%s = ", name);
2576 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2580 if (!no_labels) printf("%s = ", name);
2581 printf("%d\n", *((int *)value));
2586 int x = *((int *)value);
2587 if (x != 0 && (x & 1023) == 0)
2591 if ((x & 1023) == 0)
2596 if (!no_labels) printf("%s = ", name);
2597 printf("%d%c\n", x, c);
2601 if (!no_labels) printf("%s = ", name);
2609 int x = *((int *)value);
2610 if (!no_labels) printf("%s = ", name);
2611 if (x == 0) printf("0\n");
2612 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2613 else printf("%dK\n", x);
2618 if (!no_labels) printf("%s = ", name);
2619 printf("%#o\n", *((int *)value));
2622 /* Can be negative only when "unset", in which case integer */
2626 int x = *((int *)value);
2629 if (x < 0) printf("%s =\n", name); else
2631 if (!no_labels) printf("%s = ", name);
2632 printf("%d.", x/1000);
2645 /* If the numerical value is unset, try for the string value */
2647 case opt_expand_uid:
2648 if (! *get_set_flag(name, oltop, last, options_block))
2650 sprintf(CS name2, "*expand_%.50s", name);
2651 ol2 = find_option(name2, oltop, last);
2654 void *value2 = ol2->value;
2655 if (options_block != NULL)
2656 value2 = (void *)((uschar *)options_block + (long int)value2);
2657 s = *((uschar **)value2);
2658 if (!no_labels) printf("%s = ", name);
2659 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2664 /* Else fall through */
2667 if (!no_labels) printf("%s = ", name);
2668 if (! *get_set_flag(name, oltop, last, options_block))
2672 pw = getpwuid(*((uid_t *)value));
2674 printf("%ld\n", (long int)(*((uid_t *)value)));
2675 else printf("%s\n", pw->pw_name);
2679 /* If the numerical value is unset, try for the string value */
2681 case opt_expand_gid:
2682 if (! *get_set_flag(name, oltop, last, options_block))
2684 sprintf(CS name2, "*expand_%.50s", name);
2685 ol2 = find_option(name2, oltop, last);
2686 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2688 void *value2 = ol2->value;
2689 if (options_block != NULL)
2690 value2 = (void *)((uschar *)options_block + (long int)value2);
2691 s = *((uschar **)value2);
2692 if (!no_labels) printf("%s = ", name);
2693 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2698 /* Else fall through */
2701 if (!no_labels) printf("%s = ", name);
2702 if (! *get_set_flag(name, oltop, last, options_block))
2706 gr = getgrgid(*((int *)value));
2708 printf("%ld\n", (long int)(*((int *)value)));
2709 else printf("%s\n", gr->gr_name);
2714 uidlist = *((uid_t **)value);
2715 if (!no_labels) printf("%s =", name);
2716 if (uidlist != NULL)
2720 if (no_labels) sep = '\0';
2721 for (i = 1; i <= (int)(uidlist[0]); i++)
2723 uschar *name = NULL;
2724 pw = getpwuid(uidlist[i]);
2725 if (pw != NULL) name = US pw->pw_name;
2726 if (sep != '\0') printf("%c", sep);
2727 if (name != NULL) printf("%s", name);
2728 else printf("%ld", (long int)(uidlist[i]));
2736 gidlist = *((gid_t **)value);
2737 if (!no_labels) printf("%s =", name);
2738 if (gidlist != NULL)
2742 if (no_labels) sep = '\0';
2743 for (i = 1; i <= (int)(gidlist[0]); i++)
2745 uschar *name = NULL;
2746 gr = getgrgid(gidlist[i]);
2747 if (gr != NULL) name = US gr->gr_name;
2748 if (sep != '\0') printf("%c", sep);
2749 if (name != NULL) printf("%s", name);
2750 else printf("%ld", (long int)(gidlist[i]));
2758 if (!no_labels) printf("%s = ", name);
2759 printf("%s\n", readconf_printtime(*((int *)value)));
2765 int *list = (int *)value;
2766 if (!no_labels) printf("%s = ", name);
2767 for (i = 0; i < list[1]; i++)
2768 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2774 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2778 case opt_expand_bool:
2779 sprintf(CS name2, "*expand_%.50s", name);
2780 ol2 = find_option(name2, oltop, last);
2781 if (ol2 != NULL && ol2->value != NULL)
2783 void *value2 = ol2->value;
2784 if (options_block != NULL)
2785 value2 = (void *)((uschar *)options_block + (long int)value2);
2786 s = *((uschar **)value2);
2789 if (!no_labels) printf("%s = ", name);
2790 printf("%s\n", string_printing(s));
2793 /* s == NULL => string not set; fall through */
2799 case opt_bool_verify:
2801 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2808 /*************************************************
2809 * Print value from main configuration *
2810 *************************************************/
2812 /* This function, called as a result of encountering the -bP option,
2813 causes the value of any main configuration variable to be output if the
2814 second argument is NULL. There are some special values:
2816 all print all main configuration options
2817 config_file print the name of the configuration file
2818 (configure_file will still work, for backward
2820 routers print the routers' configurations
2821 transports print the transports' configuration
2822 authenticators print the authenticators' configuration
2823 macros print the macros' configuration
2824 router_list print a list of router names
2825 transport_list print a list of transport names
2826 authenticator_list print a list of authentication mechanism names
2827 macro_list print a list of macro names
2828 +name print a named list item
2829 local_scan print the local_scan options
2830 config print the configuration as it is parsed
2831 environment print the used execution environment
2833 If the second argument is not NULL, it must be one of "router", "transport",
2834 "authenticator" or "macro" in which case the first argument identifies the
2835 driver whose options are to be printed.
2838 name option name if type == NULL; else driver name
2839 type NULL or driver type name, as described above
2840 no_labels avoid the "foo = " at the start of an item
2846 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2848 BOOL names_only = FALSE;
2850 optionlist *ol2 = NULL;
2851 driver_instance *d = NULL;
2862 static uschar *types[] = { US"address", US"domain", US"host",
2864 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2865 &hostlist_anchor, &localpartlist_anchor };
2867 for (i = 0; i < 4; i++)
2869 t = tree_search(*(anchors[i]), name+1);
2874 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2876 printf("%slist %s = %s\n", types[i], name+1,
2877 ((namedlist_block *)(t->data.ptr))->string);
2882 printf("no address, domain, host, or local part list called \"%s\" "
2883 "exists\n", name+1);
2888 if ( Ustrcmp(name, "configure_file") == 0
2889 || Ustrcmp(name, "config_file") == 0)
2891 printf("%s\n", CS config_main_filename);
2895 if (Ustrcmp(name, "all") == 0)
2897 for (ol = optionlist_config;
2898 ol < optionlist_config + nelem(optionlist_config); ol++)
2900 if ((ol->type & opt_hidden) == 0)
2901 print_ol(ol, US ol->name, NULL,
2902 optionlist_config, nelem(optionlist_config),
2908 if (Ustrcmp(name, "local_scan") == 0)
2910 #ifndef LOCAL_SCAN_HAS_OPTIONS
2911 printf("local_scan() options are not supported\n");
2913 for (ol = local_scan_options;
2914 ol < local_scan_options + local_scan_options_count; ol++)
2916 print_ol(ol, US ol->name, NULL, local_scan_options,
2917 local_scan_options_count, no_labels);
2923 if (Ustrcmp(name, "config") == 0)
2925 print_config(admin_user, no_labels);
2929 if (Ustrcmp(name, "routers") == 0)
2934 else if (Ustrcmp(name, "transports") == 0)
2936 type = US"transport";
2940 else if (Ustrcmp(name, "authenticators") == 0)
2942 type = US"authenticator";
2946 else if (Ustrcmp(name, "macros") == 0)
2952 else if (Ustrcmp(name, "router_list") == 0)
2959 else if (Ustrcmp(name, "transport_list") == 0)
2961 type = US"transport";
2966 else if (Ustrcmp(name, "authenticator_list") == 0)
2968 type = US"authenticator";
2973 else if (Ustrcmp(name, "macro_list") == 0)
2980 else if (Ustrcmp(name, "environment") == 0)
2985 for (p = USS environ; *p; p++) ;
2986 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2988 for (p = USS environ; *p; p++)
2991 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
3000 print_ol(find_option(name, optionlist_config, nelem(optionlist_config)),
3001 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
3006 /* Handle the options for a router or transport. Skip options that are flagged
3007 as hidden. Some of these are options with names starting with '*', used for
3008 internal alternative representations of other options (which the printing
3009 function will sort out). Others are synonyms kept for backward compatibility.
3012 if (Ustrcmp(type, "router") == 0)
3014 d = (driver_instance *)routers;
3015 ol2 = optionlist_routers;
3016 size = optionlist_routers_size;
3018 else if (Ustrcmp(type, "transport") == 0)
3020 d = (driver_instance *)transports;
3021 ol2 = optionlist_transports;
3022 size = optionlist_transports_size;
3024 else if (Ustrcmp(type, "authenticator") == 0)
3026 d = (driver_instance *)auths;
3027 ol2 = optionlist_auths;
3028 size = optionlist_auths_size;
3031 else if (Ustrcmp(type, "macro") == 0)
3033 /* People store passwords in macros and they were previously not available
3034 for printing. So we have an admin_users restriction. */
3037 fprintf(stderr, "exim: permission denied\n");
3040 if (!macros_builtin_created) macros_create_builtin();
3041 for (m = macros; m; m = m->next)
3042 if (!name || Ustrcmp(name, m->name) == 0)
3045 printf("%s\n", CS m->name);
3047 printf("%s=%s\n", CS m->name, CS m->replacement);
3052 printf("%s %s not found\n", type, name);
3058 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
3062 /* Either search for a given driver, or print all of them */
3064 for (; d != NULL; d = d->next)
3067 printf("\n%s %s:\n", d->name, type);
3068 else if (Ustrcmp(d->name, name) != 0) continue;
3070 for (ol = ol2; ol < ol2 + size; ol++)
3072 if ((ol->type & opt_hidden) == 0)
3073 print_ol(ol, US ol->name, d, ol2, size, no_labels);
3076 for (ol = d->info->options;
3077 ol < d->info->options + *(d->info->options_count); ol++)
3079 if ((ol->type & opt_hidden) == 0)
3080 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
3082 if (name != NULL) return;
3084 if (name != NULL) printf("%s %s not found\n", type, name);
3089 /*************************************************
3090 * Read a named list item *
3091 *************************************************/
3093 /* This function reads a name and a list (i.e. string). The name is used to
3094 save the list in a tree, sorted by its name. Each entry also has a number,
3095 which can be used for caching tests, but if the string contains any expansion
3096 items other than $key, the number is set negative to inhibit caching. This
3097 mechanism is used for domain, host, and address lists that are referenced by
3101 anchorp points to the tree anchor
3102 numberp points to the current number for this tree
3103 max the maximum number permitted
3104 s the text of the option line, starting immediately after the name
3106 tname the name of the list type, for messages
3112 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3115 BOOL forcecache = FALSE;
3118 namedlist_block *nb = store_get(sizeof(namedlist_block));
3120 if (Ustrncmp(s, "_cache", 6) == 0)
3127 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3129 if (*numberp >= max)
3130 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3133 while (isspace(*s)) s++;
3135 while (isalnum(*s) || *s == '_') s++;
3136 t = store_get(sizeof(tree_node) + s-ss);
3137 Ustrncpy(t->name, ss, s-ss);
3139 while (isspace(*s)) s++;
3141 if (!tree_insertnode(anchorp, t))
3142 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3143 "duplicate name \"%s\" for a named %s", t->name, tname);
3146 nb->number = *numberp;
3149 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3150 "missing '=' after \"%s\"", t->name);
3151 while (isspace(*s)) s++;
3152 nb->string = read_string(s, t->name);
3153 nb->cache_data = NULL;
3155 /* Check the string for any expansions; if any are found, mark this list
3156 uncacheable unless the user has explicited forced caching. */
3158 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3164 /*************************************************
3165 * Unpick data for a rate limit *
3166 *************************************************/
3168 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3172 s string, in the form t,b,f,l
3173 where t is the threshold (integer)
3174 b is the initial delay (time)
3175 f is the multiplicative factor (fixed point)
3176 k is the maximum time (time)
3177 threshold where to store threshold
3178 base where to store base in milliseconds
3179 factor where to store factor in milliseconds
3180 limit where to store limit
3182 Returns: nothing (panics on error)
3186 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3189 uschar bstring[16], lstring[16];
3191 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3192 factor, lstring) == 4)
3194 *base = readconf_readtime(bstring, 0, TRUE);
3195 *limit = readconf_readtime(lstring, 0, TRUE);
3196 if (*base >= 0 && *limit >= 0) return;
3198 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3204 /*************************************************
3205 * Drop privs for checking TLS config *
3206 *************************************************/
3208 /* We want to validate TLS options during readconf, but do not want to be
3209 root when we call into the TLS library, in case of library linkage errors
3210 which cause segfaults; before this check, those were always done as the Exim
3211 runtime user and it makes sense to continue with that.
3213 Assumes: tls_require_ciphers has been set, if it will be
3214 exim_user has been set, if it will be
3215 exim_group has been set, if it will be
3217 Returns: bool for "okay"; false will cause caller to immediately exit.
3222 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3224 const uschar *errmsg;
3227 void (*oldsignal)(int);
3229 /* If TLS will never be used, no point checking ciphers */
3231 if ( !tls_advertise_hosts
3232 || !*tls_advertise_hosts
3233 || Ustrcmp(tls_advertise_hosts, ":") == 0
3236 else if (!nowarn && !tls_certificate)
3237 log_write(0, LOG_MAIN,
3238 "Warning: No server certificate defined; will use a selfsigned one.\n"
3239 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3241 oldsignal = signal(SIGCHLD, SIG_DFL);
3244 if ((pid = fork()) < 0)
3245 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3249 /* in some modes, will have dropped privilege already */
3251 exim_setugid(exim_uid, exim_gid, FALSE,
3252 US"calling tls_validate_require_cipher");
3254 errmsg = tls_validate_require_cipher();
3257 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3258 "tls_require_ciphers invalid: %s", errmsg);
3265 rc = waitpid(pid, &status, 0);
3266 } while (rc < 0 && errno == EINTR);
3269 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3272 signal(SIGCHLD, oldsignal);
3276 #endif /* SUPPORT_TLS */
3281 /*************************************************
3282 * Read main configuration options *
3283 *************************************************/
3285 /* This function is the first to be called for configuration reading. It
3286 opens the configuration file and reads general configuration settings until
3287 it reaches the end of the configuration section. The file is then left open so
3288 that the remaining configuration data can subsequently be read if needed for
3291 The configuration file must be owned either by root or exim, and be writeable
3292 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3293 in the config file, so the test is done on the compiled in values. A slight
3294 anomaly, to be carefully documented.
3296 The name of the configuration file is taken from a list that is included in the
3297 binary of Exim. It can be altered from the command line, but if that is done,
3298 root privilege is immediately withdrawn unless the caller is root or exim.
3299 The first file on the list that exists is used.
3301 For use on multiple systems that share file systems, first look for a
3302 configuration file whose name has the current node name on the end. If that is
3303 not found, try the generic name. For really contorted configurations, that run
3304 multiple Exims with different uid settings, first try adding the effective uid
3305 before the node name. These complications are going to waste resources on most
3306 systems. Therefore they are available only when requested by compile-time
3310 readconf_main(BOOL nowarn)
3313 struct stat statbuf;
3314 uschar *s, *filename;
3315 const uschar *list = config_main_filelist;
3317 /* Loop through the possible file names */
3319 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3322 /* Cut out all the fancy processing unless specifically wanted */
3324 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3325 uschar *suffix = filename + Ustrlen(filename);
3327 /* Try for the node-specific file if a node name exists */
3329 #ifdef CONFIGURE_FILE_USE_NODE
3331 if (uname(&uts) >= 0)
3333 #ifdef CONFIGURE_FILE_USE_EUID
3334 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3335 config_file = Ufopen(filename, "rb");
3336 if (config_file == NULL)
3337 #endif /* CONFIGURE_FILE_USE_EUID */
3339 sprintf(CS suffix, ".%.256s", uts.nodename);
3340 config_file = Ufopen(filename, "rb");
3343 #endif /* CONFIGURE_FILE_USE_NODE */
3345 /* Otherwise, try the generic name, possibly with the euid added */
3347 #ifdef CONFIGURE_FILE_USE_EUID
3348 if (config_file == NULL)
3350 sprintf(CS suffix, ".%ld", (long int)original_euid);
3351 config_file = Ufopen(filename, "rb");
3353 #endif /* CONFIGURE_FILE_USE_EUID */
3355 /* Finally, try the unadorned name */
3357 if (config_file == NULL)
3360 config_file = Ufopen(filename, "rb");
3362 #else /* if neither defined */
3364 /* This is the common case when the fancy processing is not included. */
3366 config_file = Ufopen(filename, "rb");
3369 /* If the file does not exist, continue to try any others. For any other
3370 error, break out (and die). */
3372 if (config_file != NULL || errno != ENOENT) break;
3375 /* On success, save the name for verification; config_filename is used when
3376 logging configuration errors (it changes for .included files) whereas
3377 config_main_filename is the name shown by -bP. Failure to open a configuration
3378 file is a serious disaster. */
3382 uschar *last_slash = Ustrrchr(filename, '/');
3383 config_filename = config_main_filename = string_copy(filename);
3385 /* The config_main_directory we need for the $config_dir expansion.
3386 config_main_filename we need for $config_file expansion.
3387 And config_dir is the directory of the current configuration, used for
3388 relative .includes. We do need to know it's name, as we change our working
3391 if (filename[0] == '/')
3392 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3395 /* relative configuration file name: working dir + / + basename(filename) */
3397 uschar buf[PATH_MAX];
3401 if (os_getcwd(buf, PATH_MAX) == NULL)
3403 perror("exim: getcwd");
3406 config_main_directory = string_cat(NULL, &size, &offset, buf);
3408 /* If the dir does not end with a "/", append one */
3409 if (config_main_directory[offset-1] != '/')
3410 config_main_directory = string_catn(config_main_directory, &size, &offset, US"/", 1);
3412 /* If the config file contains a "/", extract the directory part */
3414 config_main_directory = string_catn(config_main_directory, &size, &offset, filename, last_slash - filename);
3416 config_main_directory[offset] = '\0';
3418 config_directory = config_main_directory;
3422 if (filename == NULL)
3423 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3424 "%s", config_main_filelist);
3426 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3427 "configuration file %s", filename));
3430 /* Now, once we found and opened our configuration file, we change the directory
3431 to a safe place. Later we change to $spool_directory. */
3433 if (Uchdir("/") < 0)
3435 perror("exim: chdir `/': ");
3439 /* Check the status of the file we have opened, if we have retained root
3440 privileges and the file isn't /dev/null (which *should* be 0666). */
3442 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3444 if (fstat(fileno(config_file), &statbuf) != 0)
3445 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3448 if ((statbuf.st_uid != root_uid /* owner not root */
3449 #ifdef CONFIGURE_OWNER
3450 && statbuf.st_uid != config_uid /* owner not the special one */
3453 (statbuf.st_gid != root_gid /* group not root & */
3454 #ifdef CONFIGURE_GROUP
3455 && statbuf.st_gid != config_gid /* group not the special one */
3457 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3459 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3461 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3462 "wrong owner, group, or mode", big_buffer);
3465 /* Process the main configuration settings. They all begin with a lower case
3466 letter. If we see something starting with an upper case letter, it is taken as
3467 a macro definition. */
3469 while ((s = get_config_line()) != NULL)
3471 if (isupper(s[0])) read_macro_assignment(s);
3473 else if (Ustrncmp(s, "domainlist", 10) == 0)
3474 read_named_list(&domainlist_anchor, &domainlist_count,
3475 MAX_NAMED_LIST, s+10, US"domain list");
3477 else if (Ustrncmp(s, "hostlist", 8) == 0)
3478 read_named_list(&hostlist_anchor, &hostlist_count,
3479 MAX_NAMED_LIST, s+8, US"host list");
3481 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3482 read_named_list(&addresslist_anchor, &addresslist_count,
3483 MAX_NAMED_LIST, s+11, US"address list");
3485 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3486 read_named_list(&localpartlist_anchor, &localpartlist_count,
3487 MAX_NAMED_LIST, s+13, US"local part list");
3490 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3491 NULL, US"main option \"%s\" unknown");
3495 /* If local_sender_retain is set, local_from_check must be unset. */
3497 if (local_sender_retain && local_from_check)
3498 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3499 "local_sender_retain are set; this combination is not allowed");
3501 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3504 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3506 /* The max retry interval must not be greater than 24 hours. */
3508 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3510 /* remote_max_parallel must be > 0 */
3512 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3514 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3515 start of a new SMTP message. */
3517 freeze_tell_config = freeze_tell;
3519 /* The primary host name may be required for expansion of spool_directory
3520 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3521 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3522 canonize it. Some people like upper case letters in their host names, so we
3523 don't force the case. */
3525 if (primary_hostname == NULL)
3527 const uschar *hostname;
3529 if (uname(&uts) < 0)
3530 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3531 hostname = US uts.nodename;
3533 if (Ustrchr(hostname, '.') == NULL)
3536 struct hostent *hostdata;
3539 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3540 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3541 MCL_DOMAIN, TRUE, NULL) != OK))
3550 #if HAVE_GETIPNODEBYNAME
3552 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3554 hostdata = gethostbyname2(CS hostname, af);
3557 hostdata = gethostbyname(CS hostname);
3560 if (hostdata != NULL)
3562 hostname = US hostdata->h_name;
3566 if (af == AF_INET) break;
3571 primary_hostname = string_copy(hostname);
3574 /* Set up default value for smtp_active_hostname */
3576 smtp_active_hostname = primary_hostname;
3578 /* If spool_directory wasn't set in the build-time configuration, it must have
3579 got set above. Of course, writing to the log may not work if log_file_path is
3580 not set, but it will at least get to syslog or somewhere, with any luck. */
3582 if (*spool_directory == 0)
3583 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3586 /* Expand the spool directory name; it may, for example, contain the primary
3587 host name. Same comment about failure. */
3589 s = expand_string(spool_directory);
3591 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3592 "\"%s\": %s", spool_directory, expand_string_message);
3593 spool_directory = s;
3595 /* Expand log_file_path, which must contain "%s" in any component that isn't
3596 the null string or "syslog". It is also allowed to contain one instance of %D
3597 or %M. However, it must NOT contain % followed by anything else. */
3599 if (*log_file_path != 0)
3601 const uschar *ss, *sss;
3602 int sep = ':'; /* Fixed for log file path */
3603 s = expand_string(log_file_path);
3605 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3606 "\"%s\": %s", log_file_path, expand_string_message);
3609 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3612 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3613 t = Ustrstr(sss, "%s");
3615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3616 "contain \"%%s\"", sss);
3618 t = Ustrchr(sss, '%');
3621 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3622 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3623 "unexpected \"%%\" character", s);
3630 /* Interpret syslog_facility into an integer argument for 'ident' param to
3631 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3634 if (syslog_facility_str != NULL)
3637 uschar *s = syslog_facility_str;
3639 if ((Ustrlen(syslog_facility_str) >= 4) &&
3640 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3643 for (i = 0; i < syslog_list_size; i++)
3645 if (strcmpic(s, syslog_list[i].name) == 0)
3647 syslog_facility = syslog_list[i].value;
3652 if (i >= syslog_list_size)
3654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3655 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3659 /* Expand pid_file_path */
3661 if (*pid_file_path != 0)
3663 s = expand_string(pid_file_path);
3665 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3666 "\"%s\": %s", pid_file_path, expand_string_message);
3670 /* Set default value of process_log_path */
3672 if (process_log_path == NULL || *process_log_path =='\0')
3673 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3675 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3678 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3680 /* Unpick the SMTP rate limiting options, if set */
3682 if (smtp_ratelimit_mail != NULL)
3684 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3685 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3688 if (smtp_ratelimit_rcpt != NULL)
3690 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3691 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3694 /* The qualify domains default to the primary host name */
3696 if (qualify_domain_sender == NULL)
3697 qualify_domain_sender = primary_hostname;
3698 if (qualify_domain_recipient == NULL)
3699 qualify_domain_recipient = qualify_domain_sender;
3701 /* Setting system_filter_user in the configuration sets the gid as well if a
3702 name is given, but a numerical value does not. */
3704 if (system_filter_uid_set && !system_filter_gid_set)
3706 struct passwd *pw = getpwuid(system_filter_uid);
3708 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3709 (long int)system_filter_uid);
3710 system_filter_gid = pw->pw_gid;
3711 system_filter_gid_set = TRUE;
3714 /* If the errors_reply_to field is set, check that it is syntactically valid
3715 and ensure it contains a domain. */
3717 if (errors_reply_to != NULL)
3720 int start, end, domain;
3721 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3722 &start, &end, &domain, FALSE);
3724 if (recipient == NULL)
3725 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3726 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3729 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3730 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3733 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3734 smtp_accept_max must also be set. */
3736 if (smtp_accept_max == 0 &&
3737 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3738 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3739 "smtp_accept_max must be set if smtp_accept_queue or "
3740 "smtp_accept_max_per_host is set");
3742 /* Set up the host number if anything is specified. It is an expanded string
3743 so that it can be computed from the host name, for example. We do this last
3744 so as to ensure that everything else is set up before the expansion. */
3746 if (host_number_string != NULL)
3750 uschar *s = expand_string(host_number_string);
3752 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3753 "failed to expand localhost_number \"%s\": %s",
3754 host_number_string, expand_string_message);
3755 n = Ustrtol(s, &end, 0);
3756 while (isspace(*end)) end++;
3758 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3759 "localhost_number value is not a number: %s", s);
3760 if (n > LOCALHOST_MAX)
3761 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3762 "localhost_number is greater than the maximum allowed value (%d)",
3768 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3770 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3771 tls_verify_certificates == NULL)
3772 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3773 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3774 (tls_verify_hosts != NULL)? "" : "try_");
3776 /* This also checks that the library linkage is working and we can call
3777 routines in it, so call even if tls_require_ciphers is unset */
3778 if (!tls_dropprivs_validate_require_cipher(nowarn))
3781 /* Magic number: at time of writing, 1024 has been the long-standing value
3782 used by so many clients, and what Exim used to use always, that it makes
3783 sense to just min-clamp this max-clamp at that. */
3784 if (tls_dh_max_bits < 1024)
3785 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3786 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3788 /* If openssl_options is set, validate it */
3789 if (openssl_options != NULL)
3792 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3793 "openssl_options is set but we're using GnuTLS");
3796 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3797 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3798 "openssl_options parse error: %s", openssl_options);
3801 #endif /*SUPPORT_TLS*/
3803 if (!nowarn && !keep_environment && environ && *environ)
3804 log_write(0, LOG_MAIN,
3805 "Warning: purging the environment.\n"
3806 " Suggested action: use keep_environment.");
3811 /*************************************************
3812 * Initialize one driver *
3813 *************************************************/
3815 /* This is called once the driver's generic options, if any, have been read.
3816 We can now find the driver, set up defaults for the private options, and
3817 unset any "set" bits in the private options table (which might have been
3818 set by another incarnation of the same driver).
3821 d pointer to driver instance block, with generic
3823 drivers_available vector of available drivers
3824 size_of_info size of each block in drivers_available
3825 class class of driver, for error message
3827 Returns: pointer to the driver info block
3830 static driver_info *
3831 init_driver(driver_instance *d, driver_info *drivers_available,
3832 int size_of_info, uschar *class)
3836 for (dd = drivers_available; dd->driver_name[0] != 0;
3837 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3839 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3842 int len = dd->options_len;
3844 d->options_block = store_get(len);
3845 memcpy(d->options_block, dd->options_block, len);
3846 for (i = 0; i < *(dd->options_count); i++)
3847 dd->options[i].type &= ~opt_set;
3852 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3853 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3855 return NULL; /* never obeyed */
3861 /*************************************************
3862 * Initialize driver list *
3863 *************************************************/
3865 /* This function is called for routers, transports, and authentication
3866 mechanisms. It reads the data from the current point in the configuration file
3867 up to the end of the section, and sets up a chain of instance blocks according
3868 to the file's contents. The file will already have been opened by a call to
3869 readconf_main, and must be left open for subsequent reading of further data.
3871 Any errors cause a panic crash. Note that the blocks with names driver_info and
3872 driver_instance must map the first portions of all the _info and _instance
3873 blocks for this shared code to work.
3876 class "router", "transport", or "authenticator"
3877 anchor &routers, &transports, &auths
3878 drivers_available available drivers
3879 size_of_info size of each info block
3880 instance_default points to default data for an instance
3881 instance_size size of instance block
3882 driver_optionlist generic option list
3883 driver_optionlist_count count of generic option list
3889 readconf_driver_init(
3891 driver_instance **anchor,
3892 driver_info *drivers_available,
3894 void *instance_default,
3896 optionlist *driver_optionlist,
3897 int driver_optionlist_count)
3899 driver_instance **p = anchor;
3900 driver_instance *d = NULL;
3903 while ((buffer = get_config_line()) != NULL)
3908 /* Read the first name on the line and test for the start of a new driver. A
3909 macro definition indicates the end of the previous driver. If this isn't the
3910 start of a new driver, the line will be re-read. */
3912 s = readconf_readname(name, sizeof(name), buffer);
3914 /* Handle macro definition, first finishing off the initialization of the
3915 previous driver, if any. */
3917 if (isupper(*name) && *s == '=')
3921 if (!d->driver_name)
3922 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3923 "no driver defined for %s \"%s\"", class, d->name);
3927 read_macro_assignment(buffer);
3931 /* If the line starts with a name terminated by a colon, we are at the
3932 start of the definition of a new driver. The rest of the line must be
3939 /* Finish off initializing the previous driver. */
3943 if (!d->driver_name)
3944 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3945 "no driver defined for %s \"%s\"", class, d->name);
3949 /* Check that we haven't already got a driver of this name */
3951 for (d = *anchor; d; d = d->next)
3952 if (Ustrcmp(name, d->name) == 0)
3953 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3954 "there are two %ss called \"%s\"", class, name);
3956 /* Set up a new driver instance data block on the chain, with
3957 its default values installed. */
3959 d = store_get(instance_size);
3960 memcpy(d, instance_default, instance_size);
3963 d->name = string_copy(name);
3965 /* Clear out the "set" bits in the generic options */
3967 for (i = 0; i < driver_optionlist_count; i++)
3968 driver_optionlist[i].type &= ~opt_set;
3970 /* Check nothing more on this line, then do the next loop iteration. */
3972 while (isspace(*s)) s++;
3973 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3977 /* Not the start of a new driver. Give an error if we have not set up a
3978 current driver yet. */
3981 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3983 /* First look to see if this is a generic option; if it is "driver",
3984 initialize the driver. If is it not a generic option, we can look for a
3985 private option provided that the driver has been previously set up. */
3987 if (readconf_handle_option(buffer, driver_optionlist,
3988 driver_optionlist_count, d, NULL))
3990 if (!d->info && d->driver_name)
3991 init_driver(d, drivers_available, size_of_info, class);
3994 /* Handle private options - pass the generic block because some may
3995 live therein. A flag with each option indicates if it is in the public
3999 readconf_handle_option(buffer, d->info->options,
4000 *(d->info->options_count), d, US"option \"%s\" unknown");
4002 /* The option is not generic and the driver name has not yet been given. */
4004 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
4005 "(\"driver\" must be specified before any private options)", name);
4008 /* Run the initialization function for the final driver. */
4012 if (!d->driver_name)
4013 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
4014 "no driver defined for %s \"%s\"", class, d->name);
4021 /*************************************************
4022 * Check driver dependency *
4023 *************************************************/
4025 /* This function is passed a driver instance and a string. It checks whether
4026 any of the string options for the driver contains the given string as an
4030 d points to a driver instance block
4031 s the string to search for
4033 Returns: TRUE if a dependency is found
4037 readconf_depends(driver_instance *d, uschar *s)
4039 int count = *(d->info->options_count);
4043 for (ol = d->info->options; ol < d->info->options + count; ol++)
4045 void *options_block;
4047 int type = ol->type & opt_mask;
4048 if (type != opt_stringptr) continue;
4049 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
4050 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
4051 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
4053 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
4054 isalnum(ss[Ustrlen(s)])) continue;
4055 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
4056 d->name, ol->name, s);
4061 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
4068 /*************************************************
4069 * Decode an error type for retries *
4070 *************************************************/
4072 /* This function is global because it is also called from the main
4073 program when testing retry information. It decodes strings such as "quota_7d"
4074 into numerical error codes.
4077 pp points to start of text
4078 p points past end of text
4079 basic_errno points to an int to receive the main error number
4080 more_errno points to an int to receive the secondary error data
4082 Returns: NULL if decoded correctly; else points to error text
4086 readconf_retry_error(const uschar *pp, const uschar *p,
4087 int *basic_errno, int *more_errno)
4090 const uschar *q = pp;
4091 while (q < p && *q != '_') q++;
4094 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
4096 *basic_errno = ERRNO_EXIMQUOTA;
4097 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
4098 return US"bad time value";
4101 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
4103 *basic_errno = ECONNREFUSED;
4106 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
4107 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
4108 else return US"A or MX expected after \"refused\"";
4112 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
4114 *basic_errno = ETIMEDOUT;
4118 int xlen = p - q - 1;
4119 const uschar *x = q + 1;
4121 static uschar *extras[] =
4122 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
4123 static int values[] =
4124 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
4126 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
4127 if (strncmpic(x, extras[i], xlen) == 0)
4129 *more_errno = values[i];
4133 if (i >= sizeof(extras)/sizeof(uschar *))
4134 if (strncmpic(x, US"DNS", xlen) == 0)
4135 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
4136 "available in retry rules (it has never worked) - treated as "
4139 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
4143 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
4144 strncmpic(pp, US"rcpt_4", 6) == 0 ||
4145 strncmpic(pp, US"data_4", 6) == 0)
4148 int x = 255; /* means "any 4xx code" */
4149 if (p != pp + 8) bad = TRUE; else
4151 int a = pp[6], b = pp[7];
4155 if (isdigit(b)) x += b - '0';
4156 else if (b == 'x') x += 100;
4159 else if (a != 'x' || b != 'x') bad = TRUE;
4163 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4164 "x is literal and d is any digit", pp);
4166 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4167 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4168 *more_errno = x << 8;
4171 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4172 strncmpic(q+1, US"failed", p-q-1) == 0)
4173 *basic_errno = ERRNO_AUTHFAIL;
4175 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4176 *basic_errno = ERRNO_SMTPCLOSED;
4178 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4179 *basic_errno = ERRNO_TLSREQUIRED;
4181 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4182 *basic_errno = ERRNO_UNKNOWNHOST;
4184 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4185 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4193 /*************************************************
4194 * Read retry information *
4195 *************************************************/
4197 /* Each line of retry information contains:
4199 . A domain name pattern or an address pattern;
4201 . An error name, possibly with additional data, or *;
4203 . An optional sequence of retry items, each consisting of an identifying
4204 letter, a cutoff time, and optional parameters.
4206 All this is decoded and placed into a control block. */
4209 /* Subroutine to read an argument, preceded by a comma and terminated
4210 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4211 1 = fixed point number (returned *1000).
4214 paddr pointer to pointer to current character; updated
4215 type 0 => read a time; 1 => read a fixed point number
4217 Returns: time in seconds or fixed point number * 1000
4221 retry_arg(const uschar **paddr, int type)
4223 const uschar *p = *paddr;
4226 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4228 while (isspace(*p)) p++;
4230 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4232 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4233 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4238 case 0: return readconf_readtime(pp, *p, FALSE);
4239 case 1: return readconf_readfixed(pp, *p);
4241 return 0; /* Keep picky compilers happy */
4244 /* The function proper */
4247 readconf_retries(void)
4249 retry_config **chain = &retries;
4253 while ((p = get_config_line()))
4255 retry_rule **rchain;
4259 next = store_get(sizeof(retry_config));
4262 chain = &(next->next);
4263 next->basic_errno = next->more_errno = 0;
4264 next->senders = NULL;
4266 rchain = &(next->rules);
4268 next->pattern = string_dequote(&p);
4269 while (isspace(*p)) p++;
4271 while (mac_isgraph(*p)) p++;
4272 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4273 "missing error type in retry rule");
4275 /* Test error names for things we understand. */
4277 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4278 &next->more_errno)))
4279 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4281 /* There may be an optional address list of senders to be used as another
4282 constraint on the rule. This was added later, so the syntax is a bit of a
4283 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4286 while (isspace(*p)) p++;
4287 if (Ustrncmp(p, "senders", 7) == 0)
4290 while (isspace(*p)) p++;
4291 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4292 "\"=\" expected after \"senders\" in retry rule");
4293 while (isspace(*p)) p++;
4294 next->senders = string_dequote(&p);
4297 /* Now the retry rules. Keep the maximum timeout encountered. */
4299 while (isspace(*p)) p++;
4303 retry_rule *rule = store_get(sizeof(retry_rule));
4305 rchain = &(rule->next);
4307 rule->rule = toupper(*p++);
4308 rule->timeout = retry_arg(&p, 0);
4309 if (rule->timeout > retry_maximum_timeout)
4310 retry_maximum_timeout = rule->timeout;
4314 case 'F': /* Fixed interval */
4315 rule->p1 = retry_arg(&p, 0);
4318 case 'G': /* Geometrically increasing intervals */
4319 case 'H': /* Ditto, but with randomness */
4320 rule->p1 = retry_arg(&p, 0);
4321 rule->p2 = retry_arg(&p, 1);
4325 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4329 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4330 (rule->rule != 'F' && rule->p2 < 1000))
4331 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4332 "bad parameters for retry rule");
4334 while (isspace(*p)) p++;
4338 while (isspace(*p)) p++;
4341 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4348 /*************************************************
4349 * Initialize authenticators *
4350 *************************************************/
4353 readconf_options_auths(void)
4355 struct auth_info * ai;
4357 readconf_options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
4359 for (ai = auths_available; ai->driver_name[0]; ai++)
4361 macro_create(string_sprintf("_DRIVER_AUTHENTICATOR_%T", ai->driver_name), US"y", FALSE, TRUE);
4362 readconf_options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
4367 /* Read the authenticators section of the configuration file.
4376 auth_instance *au, *bu;
4378 readconf_driver_init(US"authenticator",
4379 (driver_instance **)(&auths), /* chain anchor */
4380 (driver_info *)auths_available, /* available drivers */
4381 sizeof(auth_info), /* size of info block */
4382 &auth_defaults, /* default values for generic options */
4383 sizeof(auth_instance), /* size of instance block */
4384 optionlist_auths, /* generic options */
4385 optionlist_auths_size);
4387 for (au = auths; au; au = au->next)
4389 if (!au->public_name)
4390 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4391 "the %s authenticator", au->name);
4393 for (bu = au->next; bu; bu = bu->next)
4394 if (strcmpic(au->public_name, bu->public_name) == 0)
4395 if ((au->client && bu->client) || (au->server && bu->server))
4396 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4397 "(%s and %s) have the same public name (%s)",
4398 au->client ? US"client" : US"server", au->name, bu->name,
4406 /*************************************************
4407 * Read ACL information *
4408 *************************************************/
4410 /* If this run of Exim is not doing something that involves receiving a
4411 message, we can just skip over the ACL information. No need to parse it.
4413 First, we have a function for acl_read() to call back to get the next line. We
4414 need to remember the line we passed, because at the end it will contain the
4415 name of the next ACL. */
4417 static uschar *acl_line;
4422 acl_line = get_config_line();
4427 /* Now the main function:
4438 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4441 acl_line = get_config_line();
4443 while(acl_line != NULL)
4449 p = readconf_readname(name, sizeof(name), acl_line);
4450 if (isupper(*name) && *p == '=')
4452 read_macro_assignment(acl_line);
4453 acl_line = get_config_line();
4457 if (*p != ':' || name[0] == 0)
4458 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4460 node = store_get(sizeof(tree_node) + Ustrlen(name));
4461 Ustrcpy(node->name, name);
4462 if (!tree_insertnode(&acl_anchor, node))
4463 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4464 "there are two ACLs called \"%s\"", name);
4466 node->data.ptr = acl_read(acl_callback, &error);
4468 if (node->data.ptr == NULL && error != NULL)
4469 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4475 /*************************************************
4476 * Read configuration for local_scan() *
4477 *************************************************/
4479 /* This function is called after "begin local_scan" is encountered in the
4480 configuration file. If the local_scan() function allows for configuration
4481 options, we can process them. Otherwise, we expire in a panic.
4488 local_scan_init(void)
4490 #ifndef LOCAL_SCAN_HAS_OPTIONS
4491 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4492 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4496 while ((p = get_config_line()) != NULL)
4498 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4499 NULL, US"local_scan option \"%s\" unknown");
4506 /*************************************************
4507 * Read rest of configuration (after main) *
4508 *************************************************/
4510 /* This function reads the rest of the runtime configuration, after the main
4511 configuration. It is called only when actually needed. Each subsequent section
4512 of the configuration starts with a line of the form
4516 where the name is "routers", "transports", etc. A section is terminated by
4517 hitting the next "begin" line, and the next name is left in next_section.
4518 Because it may confuse people as to whether the names are singular or plural,
4519 we add "s" if it's missing. There is always enough room in next_section for
4520 this. This function is basically just a switch.
4526 static uschar *section_list[] = {
4540 while(next_section[0] != 0)
4544 int last = sizeof(section_list) / sizeof(uschar *);
4546 int n = Ustrlen(next_section);
4548 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4552 int c = strcmpic(next_section, section_list[mid]);
4554 if (c > 0) first = mid + 1; else last = mid;
4556 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4557 "\"%.*s\" is not a known configuration section name", n, next_section);
4558 mid = (last + first)/2;
4562 if (((had ^= bit) & bit) == 0)
4563 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4564 "\"%.*s\" section is repeated in the configuration file", n,
4569 case 0: readconf_acl(); break;
4570 case 1: auths_init(); break;
4571 case 2: local_scan_init(); break;
4572 case 3: readconf_retries(); break;
4573 case 4: readconf_rewrites(); break;
4574 case 5: route_init(); break;
4575 case 6: transport_init(); break;
4579 (void)fclose(config_file);
4582 /* Init the storage for the pre-parsed config lines */
4584 readconf_save_config(const uschar *s)
4586 save_config_line(string_sprintf("# Exim Configuration (%s)",
4587 running_in_test_harness ? US"X" : s));
4591 save_config_position(const uschar *file, int line)
4593 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4596 /* Append a pre-parsed logical line to the config lines store,
4597 this operates on a global (static) list that holds all the pre-parsed
4598 config lines, we do no further processing here, output formatting and
4599 honouring of <hide> or macros will be done during output */
4601 save_config_line(const uschar* line)
4603 static config_line_item *current;
4604 config_line_item *next;
4606 next = (config_line_item*) store_get(sizeof(config_line_item));
4607 next->line = string_copy(line);
4610 if (!config_lines) config_lines = next;
4611 else current->next = next;
4616 /* List the parsed config lines, care about nice formatting and
4617 hide the <hide> values unless we're the admin user */
4619 print_config(BOOL admin, BOOL terse)
4621 config_line_item *i;
4622 const int TS = terse ? 0 : 2;
4625 for (i = config_lines; i; i = i->next)
4630 /* skip over to the first non-space */
4631 for (current = i->line; *current && isspace(*current); ++current)
4634 if (*current == '\0')
4637 /* Collapse runs of spaces. We stop this if we encounter one of the
4638 * following characters: "'$, as this may indicate careful formatting */
4639 for (p = current; *p; ++p)
4642 if (!isspace(*p)) continue;
4643 if (*p != ' ') *p = ' ';
4645 for (next = p; isspace(*next); ++next)
4649 memmove(p+1, next, Ustrlen(next)+1);
4651 if (*next == '"' || *next == '\'' || *next == '$')
4656 if (current[0] == '#')
4659 /* begin lines are left aligned */
4660 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4662 if (!terse) puts("");
4667 /* router/acl/transport block names */
4668 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4670 if (!terse) puts("");
4671 printf("%*s%s\n", TS, "", current);
4675 /* hidden lines (all MACROS or lines prefixed with "hide") */
4677 && ( isupper(*current)
4678 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4682 if ((p = Ustrchr(current, '=')))
4685 printf("%*s%s= %s\n", indent, "", current, hidden);
4687 /* e.g.: hide split_spool_directory */
4689 printf("%*s\n", indent, hidden);
4693 /* rest is public */
4694 printf("%*s%s\n", indent, "", current);
4700 /* End of readconf.c */