1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
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 #define CSTATE_STACK_SIZE 10
17 /* Structure for chain (stack) of .included files */
19 typedef struct config_file_item {
20 struct config_file_item *next;
26 /* Structure of table of conditional words and their state transitions */
28 typedef struct cond_item {
36 /* Structure of table of syslog facility names and values */
38 typedef struct syslog_fac_item {
44 /* Static variables */
46 static config_file_item *config_file_stack = NULL; /* For includes */
48 static uschar *syslog_facility_str = NULL;
49 static uschar next_section[24];
50 static uschar time_buffer[24];
52 /* State variables for conditional loading (.ifdef / .else / .endif) */
54 static int cstate = 0;
55 static int cstate_stack_ptr = -1;
56 static int cstate_stack[CSTATE_STACK_SIZE];
58 /* Table of state transitions for handling conditional inclusions. There are
59 four possible state transitions:
63 .elifdef true (or .else)
66 .endif just causes the previous cstate to be popped off the stack */
68 static int next_cstate[3][4] =
70 /* State 0: reading from file, or reading until next .else or .endif */
72 /* State 1: condition failed, skipping until next .else or .endif */
74 /* State 2: skipping until .endif */
78 /* Table of conditionals and the states to set. For each name, there are four
79 values: the length of the name (to save computing it each time), the state to
80 set if a macro was found in the line, the state to set if a macro was not found
81 in the line, and a stack manipulation setting which is:
83 -1 pull state value off the stack
84 0 don't alter the stack
85 +1 push value onto stack, before setting new state
88 static cond_item cond_list[] = {
89 { US"ifdef", 5, 0, 1, 1 },
90 { US"ifndef", 6, 1, 0, 1 },
91 { US"elifdef", 7, 2, 3, 0 },
92 { US"elifndef", 8, 3, 2, 0 },
93 { US"else", 4, 2, 2, 0 },
94 { US"endif", 5, 0, 0, -1 }
97 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
99 /* Table of syslog facility names and their values */
101 static syslog_fac_item syslog_list[] = {
102 { US"mail", LOG_MAIL },
103 { US"user", LOG_USER },
104 { US"news", LOG_NEWS },
105 { US"uucp", LOG_UUCP },
106 { US"local0", LOG_LOCAL0 },
107 { US"local1", LOG_LOCAL1 },
108 { US"local2", LOG_LOCAL2 },
109 { US"local3", LOG_LOCAL3 },
110 { US"local4", LOG_LOCAL4 },
111 { US"local5", LOG_LOCAL5 },
112 { US"local6", LOG_LOCAL6 },
113 { US"local7", LOG_LOCAL7 },
114 { US"daemon", LOG_DAEMON }
117 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
122 /*************************************************
123 * Main configuration options *
124 *************************************************/
126 /* The list of options that can be set in the main configuration file. This
127 must be in alphabetic order because it is searched by binary chop. */
129 static optionlist optionlist_config[] = {
130 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
131 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
132 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
133 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
134 { "accept_8bitmime", opt_bool, &accept_8bitmime },
135 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
136 #ifdef WITH_CONTENT_SCAN
137 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
139 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
140 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
141 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
142 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
143 #ifdef EXPERIMENTAL_PRDR
144 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
147 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
149 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
150 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
151 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
152 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
153 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
154 #ifdef WITH_CONTENT_SCAN
155 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
157 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
158 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
159 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
160 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
162 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
164 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
165 { "admin_groups", opt_gidlist, &admin_groups },
166 { "allow_domain_literals", opt_bool, &allow_domain_literals },
167 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
168 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
169 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
170 { "auto_thaw", opt_time, &auto_thaw },
171 #ifdef WITH_CONTENT_SCAN
172 { "av_scanner", opt_stringptr, &av_scanner },
174 { "bi_command", opt_stringptr, &bi_command },
175 #ifdef EXPERIMENTAL_BRIGHTMAIL
176 { "bmi_config_file", opt_stringptr, &bmi_config_file },
178 { "bounce_message_file", opt_stringptr, &bounce_message_file },
179 { "bounce_message_text", opt_stringptr, &bounce_message_text },
180 { "bounce_return_body", opt_bool, &bounce_return_body },
181 { "bounce_return_message", opt_bool, &bounce_return_message },
182 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
183 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
184 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
185 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
186 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
187 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
188 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
189 { "check_log_inodes", opt_int, &check_log_inodes },
190 { "check_log_space", opt_Kint, &check_log_space },
191 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
192 { "check_spool_inodes", opt_int, &check_spool_inodes },
193 { "check_spool_space", opt_Kint, &check_spool_space },
194 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
195 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
196 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
197 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
198 #ifdef EXPERIMENTAL_DCC
199 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
200 { "dccifd_address", opt_stringptr, &dccifd_address },
201 { "dccifd_options", opt_stringptr, &dccifd_options },
203 { "delay_warning", opt_timelist, &delay_warning },
204 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
205 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
206 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
207 { "delivery_date_remove", opt_bool, &delivery_date_remove },
208 #ifdef ENABLE_DISABLE_FSYNC
209 { "disable_fsync", opt_bool, &disable_fsync },
211 { "disable_ipv6", opt_bool, &disable_ipv6 },
213 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
215 #ifdef EXPERIMENTAL_DMARC
216 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
217 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
218 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
220 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
221 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
222 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
223 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
224 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
225 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
226 { "dns_retrans", opt_time, &dns_retrans },
227 { "dns_retry", opt_int, &dns_retry },
228 { "dns_use_edns0", opt_int, &dns_use_edns0 },
229 /* This option is now a no-op, retained for compability */
230 { "drop_cr", opt_bool, &drop_cr },
231 /*********************************************************/
232 { "dsn_from", opt_stringptr, &dsn_from },
233 { "envelope_to_remove", opt_bool, &envelope_to_remove },
234 { "errors_copy", opt_stringptr, &errors_copy },
235 { "errors_reply_to", opt_stringptr, &errors_reply_to },
236 { "exim_group", opt_gid, &exim_gid },
237 { "exim_path", opt_stringptr, &exim_path },
238 { "exim_user", opt_uid, &exim_uid },
239 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
240 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
241 { "finduser_retries", opt_int, &finduser_retries },
242 { "freeze_tell", opt_stringptr, &freeze_tell },
243 { "gecos_name", opt_stringptr, &gecos_name },
244 { "gecos_pattern", opt_stringptr, &gecos_pattern },
246 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
247 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
248 /* These three gnutls_require_* options stopped working in Exim 4.80 */
249 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
250 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
251 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
253 { "header_line_maxsize", opt_int, &header_line_maxsize },
254 { "header_maxsize", opt_int, &header_maxsize },
255 { "headers_charset", opt_stringptr, &headers_charset },
256 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
257 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
258 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
259 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
260 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
261 { "hold_domains", opt_stringptr, &hold_domains },
262 { "host_lookup", opt_stringptr, &host_lookup },
263 { "host_lookup_order", opt_stringptr, &host_lookup_order },
264 { "host_reject_connection", opt_stringptr, &host_reject_connection },
265 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
266 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
268 { "ibase_servers", opt_stringptr, &ibase_servers },
270 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
271 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
272 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
273 { "keep_malformed", opt_time, &keep_malformed },
275 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
276 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
277 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
278 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
279 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
280 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
281 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
282 { "ldap_start_tls", opt_bool, &eldap_start_tls },
283 { "ldap_version", opt_int, &eldap_version },
285 { "local_from_check", opt_bool, &local_from_check },
286 { "local_from_prefix", opt_stringptr, &local_from_prefix },
287 { "local_from_suffix", opt_stringptr, &local_from_suffix },
288 { "local_interfaces", opt_stringptr, &local_interfaces },
289 { "local_scan_timeout", opt_time, &local_scan_timeout },
290 { "local_sender_retain", opt_bool, &local_sender_retain },
291 { "localhost_number", opt_stringptr, &host_number_string },
292 { "log_file_path", opt_stringptr, &log_file_path },
293 { "log_selector", opt_stringptr, &log_selector_string },
294 { "log_timezone", opt_bool, &log_timezone },
295 { "lookup_open_max", opt_int, &lookup_open_max },
296 { "max_username_length", opt_int, &max_username_length },
297 { "message_body_newlines", opt_bool, &message_body_newlines },
298 { "message_body_visible", opt_mkint, &message_body_visible },
299 { "message_id_header_domain", opt_stringptr, &message_id_domain },
300 { "message_id_header_text", opt_stringptr, &message_id_text },
301 { "message_logs", opt_bool, &message_logs },
302 { "message_size_limit", opt_stringptr, &message_size_limit },
303 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
304 { "move_frozen_messages", opt_bool, &move_frozen_messages },
306 { "mua_wrapper", opt_bool, &mua_wrapper },
308 { "mysql_servers", opt_stringptr, &mysql_servers },
310 { "never_users", opt_uidlist, &never_users },
312 { "openssl_options", opt_stringptr, &openssl_options },
315 { "oracle_servers", opt_stringptr, &oracle_servers },
317 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
319 { "perl_at_start", opt_bool, &opt_perl_at_start },
320 { "perl_startup", opt_stringptr, &opt_perl_startup },
323 { "pgsql_servers", opt_stringptr, &pgsql_servers },
325 { "pid_file_path", opt_stringptr, &pid_file_path },
326 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
327 #ifdef EXPERIMENTAL_PRDR
328 { "prdr_enable", opt_bool, &prdr_enable },
330 { "preserve_message_logs", opt_bool, &preserve_message_logs },
331 { "primary_hostname", opt_stringptr, &primary_hostname },
332 { "print_topbitchars", opt_bool, &print_topbitchars },
333 { "process_log_path", opt_stringptr, &process_log_path },
334 { "prod_requires_admin", opt_bool, &prod_requires_admin },
335 #ifdef EXPERIMENTAL_PROXY
336 { "proxy_required_hosts", opt_stringptr, &proxy_required_hosts },
338 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
339 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
340 { "queue_domains", opt_stringptr, &queue_domains },
341 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
342 { "queue_only", opt_bool, &queue_only },
343 { "queue_only_file", opt_stringptr, &queue_only_file },
344 { "queue_only_load", opt_fixed, &queue_only_load },
345 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
346 { "queue_only_override", opt_bool, &queue_only_override },
347 { "queue_run_in_order", opt_bool, &queue_run_in_order },
348 { "queue_run_max", opt_int, &queue_run_max },
349 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
350 { "receive_timeout", opt_time, &receive_timeout },
351 { "received_header_text", opt_stringptr, &received_header_text },
352 { "received_headers_max", opt_int, &received_headers_max },
353 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
354 { "recipients_max", opt_int, &recipients_max },
355 { "recipients_max_reject", opt_bool, &recipients_max_reject },
356 #ifdef EXPERIMENTAL_REDIS
357 { "redis_servers", opt_stringptr, &redis_servers },
359 { "remote_max_parallel", opt_int, &remote_max_parallel },
360 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
361 { "retry_data_expire", opt_time, &retry_data_expire },
362 { "retry_interval_max", opt_time, &retry_interval_max },
363 { "return_path_remove", opt_bool, &return_path_remove },
364 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
365 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
366 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
367 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
368 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
369 { "smtp_accept_max", opt_int, &smtp_accept_max },
370 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
371 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
372 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
373 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
374 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
375 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
376 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
377 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
378 { "smtp_banner", opt_stringptr, &smtp_banner },
379 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
380 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
381 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
382 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
383 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
384 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
385 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
386 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
387 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
388 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
389 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
390 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
391 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
392 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
393 #ifdef WITH_CONTENT_SCAN
394 { "spamd_address", opt_stringptr, &spamd_address },
396 #ifdef EXPERIMENTAL_SPF
397 { "spf_guess", opt_stringptr, &spf_guess },
399 { "split_spool_directory", opt_bool, &split_spool_directory },
400 { "spool_directory", opt_stringptr, &spool_directory },
402 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
404 #ifdef EXPERIMENTAL_SRS
405 { "srs_config", opt_stringptr, &srs_config },
406 { "srs_hashlength", opt_int, &srs_hashlength },
407 { "srs_hashmin", opt_int, &srs_hashmin },
408 { "srs_maxage", opt_int, &srs_maxage },
409 { "srs_secrets", opt_stringptr, &srs_secrets },
410 { "srs_usehash", opt_bool, &srs_usehash },
411 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
413 { "strict_acl_vars", opt_bool, &strict_acl_vars },
414 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
415 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
416 { "syslog_duplication", opt_bool, &syslog_duplication },
417 { "syslog_facility", opt_stringptr, &syslog_facility_str },
418 { "syslog_processname", opt_stringptr, &syslog_processname },
419 { "syslog_timestamp", opt_bool, &syslog_timestamp },
420 { "system_filter", opt_stringptr, &system_filter },
421 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
422 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
423 { "system_filter_group", opt_gid, &system_filter_gid },
424 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
425 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
426 { "system_filter_user", opt_uid, &system_filter_uid },
427 { "tcp_nodelay", opt_bool, &tcp_nodelay },
428 #ifdef USE_TCP_WRAPPERS
429 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
431 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
432 { "timezone", opt_stringptr, &timezone_string },
434 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
435 { "tls_certificate", opt_stringptr, &tls_certificate },
436 { "tls_crl", opt_stringptr, &tls_crl },
437 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
438 { "tls_dhparam", opt_stringptr, &tls_dhparam },
439 # if defined(EXPERIMENTAL_OCSP)
440 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
442 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
443 { "tls_privatekey", opt_stringptr, &tls_privatekey },
444 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
445 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
446 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
447 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
448 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
450 { "trusted_groups", opt_gidlist, &trusted_groups },
451 { "trusted_users", opt_uidlist, &trusted_users },
452 { "unknown_login", opt_stringptr, &unknown_login },
453 { "unknown_username", opt_stringptr, &unknown_username },
454 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
455 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
456 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
457 { "warn_message_file", opt_stringptr, &warn_message_file },
458 { "write_rejectlog", opt_bool, &write_rejectlog }
461 static int optionlist_config_size =
462 sizeof(optionlist_config)/sizeof(optionlist);
466 /*************************************************
467 * Find the name of an option *
468 *************************************************/
470 /* This function is to aid debugging. Various functions take arguments that are
471 pointer variables in the options table or in option tables for various drivers.
472 For debugging output, it is useful to be able to find the name of the option
473 which is currently being processed. This function finds it, if it exists, by
474 searching the table(s).
476 Arguments: a value that is presumed to be in the table above
477 Returns: the option name, or an empty string
481 readconf_find_option(void *p)
485 transport_instance *t;
487 for (i = 0; i < optionlist_config_size; i++)
488 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
490 for (r = routers; r != NULL; r = r->next)
492 router_info *ri = r->info;
493 for (i = 0; i < ri->options_count[0]; i++)
495 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
496 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
497 return US ri->options[i].name;
501 for (t = transports; t != NULL; t = t->next)
503 transport_info *ti = t->info;
504 for (i = 0; i < ti->options_count[0]; i++)
506 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
507 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
508 return US ti->options[i].name;
518 /*************************************************
519 * Deal with an assignment to a macro *
520 *************************************************/
522 /* This function is called when a line that starts with an upper case letter is
523 encountered. The argument "line" should contain a complete logical line, and
524 start with the first letter of the macro name. The macro name and the
525 replacement text are extracted and stored. Redefinition of existing,
526 non-command line, macros is permitted using '==' instead of '='.
529 s points to the start of the logical line
535 read_macro_assignment(uschar *s)
541 macro_item *mlast = NULL;
543 while (isalnum(*s) || *s == '_')
545 if (namelen >= sizeof(name) - 1)
546 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
547 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
548 name[namelen++] = *s++;
552 while (isspace(*s)) s++;
554 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
561 while (isspace(*s)) s++;
563 /* If an existing macro of the same name was defined on the command line, we
564 just skip this definition. It's an error to attempt to redefine a macro without
565 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
566 It is also an error to define a macro whose name begins with the name of a
567 previously defined macro. Note: it is documented that the other way round
570 for (m = macros; m != NULL; m = m->next)
572 int len = Ustrlen(m->name);
574 if (Ustrcmp(m->name, name) == 0)
576 if (!m->command_line && !redef)
577 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
578 "defined (use \"==\" if you want to redefine it", name);
582 if (len < namelen && Ustrstr(name, m->name) != NULL)
583 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
584 "a macro because previously defined macro \"%s\" is a substring",
587 /* We cannot have this test, because it is documented that a substring
588 macro is permitted (there is even an example).
590 * if (len > namelen && Ustrstr(m->name, name) != NULL)
591 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
592 * "a macro because it is a substring of previously defined macro \"%s\"",
599 /* Check for an overriding command-line definition. */
601 if (m != NULL && m->command_line) return;
603 /* Redefinition must refer to an existing macro. */
608 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
612 /* We have a new definition. The macro_item structure includes a final vector
613 called "name" which is one byte long. Thus, adding "namelen" gives us enough
614 room to store the "name" string. */
618 m = store_get(sizeof(macro_item) + namelen);
619 if (macros == NULL) macros = m; else mlast->next = m;
620 Ustrncpy(m->name, name, namelen);
621 m->name[namelen] = 0;
623 m->command_line = FALSE;
626 /* Set the value of the new or redefined macro */
628 m->replacement = string_copy(s);
635 /*************************************************
636 * Read configuration line *
637 *************************************************/
639 /* A logical line of text is read from the configuration file into the big
640 buffer, taking account of macros, .includes, and continuations. The size of
641 big_buffer is increased if necessary. The count of configuration lines is
642 maintained. Physical input lines starting with # (ignoring leading white space,
643 and after macro replacement) and empty logical lines are always ignored.
644 Leading and trailing spaces are removed.
646 If we hit a line of the form "begin xxxx", the xxxx is placed in the
647 next_section vector, and the function returns NULL, indicating the end of a
648 configuration section. On end-of-file, NULL is returned with next_section
653 Returns: a pointer to the first non-blank in the line,
654 or NULL if eof or end of section is reached
658 get_config_line(void)
660 int startoffset = 0; /* To first non-blank char in logical line */
661 int len = 0; /* Of logical line so far */
667 /* Loop for handling continuation lines, skipping comments, and dealing with
672 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
674 if (config_file_stack != NULL) /* EOF inside .include */
676 (void)fclose(config_file);
677 config_file = config_file_stack->file;
678 config_filename = config_file_stack->filename;
679 config_lineno = config_file_stack->lineno;
680 config_file_stack = config_file_stack->next;
684 /* EOF at top level */
686 if (cstate_stack_ptr >= 0)
687 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
688 "Unexpected end of configuration file: .endif missing");
690 if (len != 0) break; /* EOF after continuation */
691 next_section[0] = 0; /* EOF at start of logical line */
696 newlen = len + Ustrlen(big_buffer + len);
698 /* Handle pathologically long physical lines - yes, it did happen - by
699 extending big_buffer at this point. The code also copes with very long
702 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
705 big_buffer_size += BIG_BUFFER_SIZE;
706 newbuffer = store_malloc(big_buffer_size);
708 /* This use of strcpy is OK because we know that the string in the old
709 buffer is shorter than the new buffer. */
711 Ustrcpy(newbuffer, big_buffer);
712 store_free(big_buffer);
713 big_buffer = newbuffer;
714 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
716 newlen += Ustrlen(big_buffer + newlen);
719 /* Find the true start of the physical line - leading spaces are always
722 ss = big_buffer + len;
723 while (isspace(*ss)) ss++;
725 /* Process the physical line for macros. If this is the start of the logical
726 line, skip over initial text at the start of the line if it starts with an
727 upper case character followed by a sequence of name characters and an equals
728 sign, because that is the definition of a new macro, and we don't do
729 replacement therein. */
732 if (len == 0 && isupper(*s))
734 while (isalnum(*s) || *s == '_') s++;
735 while (isspace(*s)) s++;
736 if (*s != '=') s = ss; /* Not a macro definition */
739 /* For each defined macro, scan the line (from after XXX= if present),
740 replacing all occurrences of the macro. */
743 for (m = macros; m != NULL; m = m->next)
748 while ((p = Ustrstr(t, m->name)) != NULL)
751 int namelen = Ustrlen(m->name);
752 int replen = Ustrlen(m->replacement);
754 /* Expand the buffer if necessary */
756 while (newlen - namelen + replen + 1 > big_buffer_size)
758 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
759 uschar *newbuffer = store_malloc(newsize);
760 memcpy(newbuffer, big_buffer, newlen + 1);
761 p = newbuffer + (p - big_buffer);
762 s = newbuffer + (s - big_buffer);
763 ss = newbuffer + (ss - big_buffer);
764 t = newbuffer + (t - big_buffer);
765 big_buffer_size = newsize;
766 store_free(big_buffer);
767 big_buffer = newbuffer;
770 /* Shuffle the remaining characters up or down in the buffer before
771 copying in the replacement text. Don't rescan the replacement for this
775 moveby = replen - namelen;
778 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
781 Ustrncpy(p, m->replacement, replen);
787 /* An empty macro replacement at the start of a line could mean that ss no
788 longer points to the first non-blank character. */
790 while (isspace(*ss)) ss++;
792 /* Check for comment lines - these are physical lines. */
794 if (*ss == '#') continue;
796 /* Handle conditionals, which are also applied to physical lines. Conditions
797 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
798 expansion occured on the rest of the line. A preliminary test for the leading
799 '.' saves effort on most lines. */
805 /* Search the list of conditional directives */
807 for (i = 0; i < cond_list_size; i++)
810 cond_item *c = cond_list+i;
811 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
813 /* The following character must be white space or end of string */
815 n = ss[1 + c->namelen];
816 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
818 /* .ifdef and .ifndef push the current state onto the stack, then set
819 a new one from the table. Stack overflow is an error */
823 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
824 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
825 ".%s nested too deeply", c->name);
826 cstate_stack[++cstate_stack_ptr] = cstate;
827 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
830 /* For any of the others, stack underflow is an error. The next state
831 comes either from the stack (.endif) or from the table. */
835 if (cstate_stack_ptr < 0)
836 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
837 ".%s without matching .ifdef", c->name);
838 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
839 next_cstate[cstate][macro_found? c->action1 : c->action2];
842 /* Having dealt with a directive, break the loop */
847 /* If we have handled a conditional directive, continue with the next
848 physical line. Otherwise, fall through. */
850 if (i < cond_list_size) continue;
853 /* If the conditional state is not 0 (actively using these lines), ignore
856 if (cstate != 0) continue; /* Conditional skip */
858 /* Handle .include lines - these are also physical lines. */
860 if (Ustrncmp(ss, ".include", 8) == 0 &&
862 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
865 int include_if_exists = isspace(ss[8])? 0 : 10;
866 config_file_item *save;
869 ss += 9 + include_if_exists;
870 while (isspace(*ss)) ss++;
871 t = ss + Ustrlen(ss);
872 while (t > ss && isspace(t[-1])) t--;
873 if (*ss == '\"' && t[-1] == '\"')
881 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
882 "absolute path \"%s\"", ss);
884 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
886 save = store_get(sizeof(config_file_item));
887 save->next = config_file_stack;
888 config_file_stack = save;
889 save->file = config_file;
890 save->filename = config_filename;
891 save->lineno = config_lineno;
893 config_file = Ufopen(ss, "rb");
894 if (config_file == NULL)
895 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
896 "configuration file %s", ss);
897 config_filename = string_copy(ss);
902 /* If this is the start of the logical line, remember where the non-blank
903 data starts. Otherwise shuffle down continuation lines to remove leading
907 startoffset = ss - big_buffer;
910 s = big_buffer + len;
913 memmove(s, ss, (newlen - len) - (ss - s) + 1);
918 /* Accept the new addition to the line. Remove trailing white space. */
921 while (len > 0 && isspace(big_buffer[len-1])) len--;
924 /* We are done if the line does not end in backslash and contains some data.
925 Empty logical lines are ignored. For continuations, remove the backslash and
926 go round the loop to read the continuation line. */
930 if (big_buffer[len-1] != '\\') break; /* End of logical line */
931 big_buffer[--len] = 0; /* Remove backslash */
933 } /* Loop for reading multiple physical lines */
935 /* We now have a logical line. Test for the end of a configuration section (or,
936 more accurately, for the start of the next section). Place the name of the next
937 section in next_section, and return NULL. If the name given is longer than
938 next_section, truncate it. It will be unrecognized later, because all the known
939 section names do fit. Leave space for pluralizing. */
941 s = big_buffer + startoffset; /* First non-space character */
942 if (strncmpic(s, US"begin ", 6) == 0)
945 while (isspace(*s)) s++;
946 if (big_buffer + len - s > sizeof(next_section) - 2)
947 s[sizeof(next_section) - 2] = 0;
948 Ustrcpy(next_section, s);
952 /* Return the first non-blank character. */
959 /*************************************************
961 *************************************************/
963 /* The yield is the pointer to the next uschar. Names longer than the
964 output space are silently truncated. This function is also used from acl.c when
968 name where to put the name
972 Returns: new input pointer
976 readconf_readname(uschar *name, int len, uschar *s)
979 while (isspace(*s)) s++;
982 while (isalnum(*s) || *s == '_')
984 if (p < len-1) name[p++] = *s;
989 while (isspace(*s)) s++;
996 /*************************************************
997 * Read a time value *
998 *************************************************/
1000 /* This function is also called from outside, to read argument
1001 time values. The format of a time value is:
1003 [<n>w][<n>d][<n>h][<n>m][<n>s]
1005 as long as at least one is present. If a format error is encountered,
1006 return a negative value. The value must be terminated by the given
1011 terminator required terminating character
1012 return_msec if TRUE, allow fractional seconds and return milliseconds
1014 Returns: the time value, or -1 on syntax error
1015 value is seconds if return_msec is FALSE
1016 value is milliseconds if return_msec is TRUE
1020 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
1028 if (!isdigit(*s)) return -1;
1029 (void)sscanf(CS s, "%d%n", &value, &count);
1034 case 'w': value *= 7;
1035 case 'd': value *= 24;
1036 case 'h': value *= 60;
1037 case 'm': value *= 60;
1042 if (!return_msec) return -1;
1043 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1045 if (*s++ != 's') return -1;
1046 yield += (int)(fraction * 1000.0);
1052 if (return_msec) value *= 1000;
1054 if (*s == terminator) return yield;
1056 /* Control never reaches here. */
1061 /*************************************************
1062 * Read a fixed point value *
1063 *************************************************/
1065 /* The value is returned *1000
1069 terminator required terminator
1071 Returns: the value, or -1 on error
1075 readconf_readfixed(uschar *s, int terminator)
1079 if (!isdigit(*s)) return -1;
1080 (void)sscanf(CS s, "%d%n", &value, &count);
1082 yield = value * 1000;
1086 while (isdigit((*(++s))))
1088 yield += (*s - '0') * m;
1093 return (*s == terminator)? yield : (-1);
1098 /*************************************************
1099 * Find option in list *
1100 *************************************************/
1102 /* The lists are always in order, so binary chop can be used.
1105 name the option name to search for
1106 ol the first entry in the option list
1107 last one more than the offset of the last entry in the option list
1109 Returns: pointer to an option entry, or NULL if not found
1113 find_option(uschar *name, optionlist *ol, int last)
1116 while (last > first)
1118 int middle = (first + last)/2;
1119 int c = Ustrcmp(name, ol[middle].name);
1120 if (c == 0) return ol + middle;
1121 else if (c > 0) first = middle + 1;
1129 /*************************************************
1130 * Find a set flag in option list *
1131 *************************************************/
1133 /* Because some versions of Unix make no restrictions on the values of uids and
1134 gids (even negative ones), we cannot represent "unset" by a special value.
1135 There is therefore a separate boolean variable for each one indicating whether
1136 a value is set or not. This function returns a pointer to the boolean, given
1137 the original option name. It is a major disaster if the flag cannot be found.
1140 name the name of the uid or gid option
1141 oltop points to the start of the relevant option list
1142 last one more than the offset of the last item in the option list
1143 data_block NULL when reading main options => data values in the option
1144 list are absolute addresses; otherwise they are byte offsets
1145 in data_block (used for driver options)
1147 Returns: a pointer to the boolean flag.
1151 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1155 sprintf(CS name2, "*set_%.50s", name);
1156 ol = find_option(name2, oltop, last);
1157 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1158 "Exim internal error: missing set flag for %s", name);
1159 return (data_block == NULL)? (BOOL *)(ol->value) :
1160 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1166 /*************************************************
1167 * Output extra characters message and die *
1168 *************************************************/
1170 /* Called when an option line has junk on the end. Sometimes this is because
1171 the sysadmin thinks comments are permitted.
1174 s points to the extra characters
1175 t1..t3 strings to insert in the log message
1177 Returns: doesn't return; dies
1181 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1183 uschar *comment = US"";
1184 if (*s == '#') comment = US" (# is comment only at line start)";
1185 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1186 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1191 /*************************************************
1192 * Read rewrite information *
1193 *************************************************/
1195 /* Each line of rewrite information contains:
1197 . A complete address in the form user@domain, possibly with
1198 leading * for each part; or alternatively, a regex.
1200 . A replacement string (which will be expanded).
1202 . An optional sequence of one-letter flags, indicating which
1203 headers etc. to apply this rule to.
1205 All this is decoded and placed into a control block. The OR of the flags is
1206 maintained in a common word.
1209 p points to the string that makes up the rule
1210 existflags points to the overall flag word
1211 isglobal TRUE if reading global rewrite rules
1213 Returns: the control block for the parsed rule.
1216 static rewrite_rule *
1217 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1219 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1222 next->key = string_dequote(&p);
1224 while (isspace(*p)) p++;
1226 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1227 "missing rewrite replacement string");
1230 next->replacement = string_dequote(&p);
1232 while (*p != 0) switch (*p++)
1234 case ' ': case '\t': break;
1236 case 'q': next->flags |= rewrite_quit; break;
1237 case 'w': next->flags |= rewrite_whole; break;
1239 case 'h': next->flags |= rewrite_all_headers; break;
1240 case 's': next->flags |= rewrite_sender; break;
1241 case 'f': next->flags |= rewrite_from; break;
1242 case 't': next->flags |= rewrite_to; break;
1243 case 'c': next->flags |= rewrite_cc; break;
1244 case 'b': next->flags |= rewrite_bcc; break;
1245 case 'r': next->flags |= rewrite_replyto; break;
1247 case 'E': next->flags |= rewrite_all_envelope; break;
1248 case 'F': next->flags |= rewrite_envfrom; break;
1249 case 'T': next->flags |= rewrite_envto; break;
1251 case 'Q': next->flags |= rewrite_qualify; break;
1252 case 'R': next->flags |= rewrite_repeat; break;
1255 next->flags |= rewrite_smtp;
1256 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1257 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1258 "rewrite rule has the S flag but is not a regular expression");
1262 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1263 "unknown rewrite flag character '%c' "
1264 "(could be missing quotes round replacement item)", p[-1]);
1268 /* If no action flags are set, set all the "normal" rewrites. */
1270 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1271 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1273 /* Remember which exist, for optimization, and return the rule */
1275 *existflags |= next->flags;
1282 /*************************************************
1283 * Read global rewrite information *
1284 *************************************************/
1286 /* Each line is a single rewrite rule; it is parsed into a control block
1287 by readconf_one_rewrite(), and its flags are ORed into the global flag
1288 word rewrite_existflags. */
1291 readconf_rewrites(void)
1293 rewrite_rule **chain = &global_rewrite_rules;
1296 while ((p = get_config_line()) != NULL)
1298 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1300 chain = &(next->next);
1306 /*************************************************
1308 *************************************************/
1310 /* Strings are read into the normal store pool. As long we aren't too
1311 near the end of the current block, the string will just use what is necessary
1312 on the top of the stacking pool, because string_cat() uses the extension
1316 s the rest of the input line
1317 name the option name (for errors)
1319 Returns: pointer to the string
1323 read_string(uschar *s, uschar *name)
1328 if (*s != '\"') return string_copy(s);
1331 yield = string_dequote(&s);
1333 if (s == ss+1 || s[-1] != '\"')
1334 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1335 "missing quote at end of string value for %s", name);
1337 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1343 /*************************************************
1344 * Handle option line *
1345 *************************************************/
1347 /* This function is called from several places to process a line containing the
1348 setting of an option. The first argument is the line to be decoded; it has been
1349 checked not to be empty and not to start with '#'. Trailing newlines and white
1350 space have been removed. The second argument is a pointer to the list of
1351 variable names that are to be recognized, together with their types and
1352 locations, and the third argument gives the number of entries in the list.
1354 The fourth argument is a pointer to a data block. If it is NULL, then the data
1355 values in the options list are absolute addresses. Otherwise, they are byte
1356 offsets in the data block.
1358 String option data may continue onto several lines; this function reads further
1359 data from config_file if necessary.
1361 The yield of this function is normally zero. If a string continues onto
1362 multiple lines, then the data value is permitted to be followed by a comma
1363 or a semicolon (for use in drivers) and the yield is that character.
1366 buffer contains the configuration line to be handled
1367 oltop points to the start of the relevant option list
1368 last one more than the offset of the last item in the option list
1369 data_block NULL when reading main options => data values in the option
1370 list are absolute addresses; otherwise they are byte offsets
1371 in data_block when they have opt_public set; otherwise
1372 they are byte offsets in data_block->options_block.
1373 unknown_txt format string to use in panic message for unknown option;
1374 must contain %s for option name
1375 if given as NULL, don't panic on unknown option
1377 Returns: TRUE if an option was read successfully,
1378 FALSE false for an unknown option if unknown_txt == NULL,
1379 otherwise panic and die on an unknown option
1383 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1384 void *data_block, uschar *unknown_txt)
1388 int n, count, type, value;
1392 BOOL boolvalue = TRUE;
1393 BOOL freesptr = TRUE;
1394 optionlist *ol, *ol2;
1398 uschar *inttype = US"";
1401 uschar *saved_condition, *strtemp;
1402 uschar **str_target;
1406 /* There may be leading spaces; thereafter, we expect an option name starting
1409 while (isspace(*s)) s++;
1411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1413 /* Read the name of the option, and skip any subsequent white space. If
1414 it turns out that what we read was "hide", set the flag indicating that
1415 this is a secure option, and loop to read the next word. */
1417 for (n = 0; n < 2; n++)
1419 while (isalnum(*s) || *s == '_')
1421 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1425 while (isspace(*s)) s++;
1426 if (Ustrcmp(name, "hide") != 0) break;
1427 issecure = opt_secure;
1431 /* Deal with "no_" or "not_" here for booleans */
1433 if (Ustrncmp(name, "no_", 3) == 0)
1439 if (Ustrncmp(name, "not_", 4) == 0)
1445 /* Search the list for the given name. A non-existent name, or an option that
1446 is set twice, is a disaster. */
1448 ol = find_option(name + offset, oltop, last);
1452 if (unknown_txt == NULL) return FALSE;
1453 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1456 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1457 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1458 "\"%s\" option set for the second time", name);
1460 ol->type |= opt_set | issecure;
1461 type = ol->type & opt_mask;
1463 /* Types with data values must be followed by '='; the "no[t]_" prefix
1464 applies only to boolean values. */
1466 if (type < opt_bool || type > opt_bool_last)
1469 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1470 "negation prefix applied to a non-boolean option");
1472 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1473 "unexpected end of line (data missing) after %s", name);
1475 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1478 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1479 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1480 ultimately expands to one of those values. */
1482 else if (*s != 0 && (offset != 0 || *s != '='))
1483 extra_chars_error(s, US"boolean option ", name, US"");
1485 /* Skip white space after = */
1487 if (*s == '=') while (isspace((*(++s))));
1489 /* If there is a data block and the opt_public flag is not set, change
1490 the data block pointer to the private options block. */
1492 if (data_block != NULL && (ol->type & opt_public) == 0)
1493 data_block = (void *)(((driver_instance *)data_block)->options_block);
1495 /* Now get the data according to the type. */
1499 /* If a string value is not enclosed in quotes, it consists of
1500 the rest of the current line, verbatim. Otherwise, string escapes
1503 A transport is specified as a string, which is then looked up in the
1504 list of transports. A search type is specified as one of a number of
1507 A set or rewrite rules for a driver is specified as a string, which is
1508 then parsed into a suitable chain of control blocks.
1510 Uids and gids are specified as strings which are then looked up in the
1511 passwd file. Lists of uids and gids are similarly specified as colon-
1512 separated strings. */
1517 case opt_expand_uid:
1518 case opt_expand_gid:
1523 reset_point = sptr = read_string(s, name);
1525 /* Having read a string, we now have several different ways of using it,
1526 depending on the data type, so do another switch. If keeping the actual
1527 string is not required (because it is interpreted), freesptr is set TRUE,
1528 and at the end we reset the pool. */
1532 /* If this was a string, set the variable to point to the new string,
1533 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1534 rules, we still keep the string (for printing), and parse the rules into a
1535 control block and flags word. */
1538 if (data_block == NULL)
1539 str_target = (uschar **)(ol->value);
1541 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1542 if (ol->type & opt_rep_con)
1544 /* We already have a condition, we're conducting a crude hack to let
1545 multiple condition rules be chained together, despite storing them in
1547 saved_condition = *str_target;
1548 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1549 saved_condition, sptr);
1550 *str_target = string_copy_malloc(strtemp);
1551 /* TODO(pdp): there is a memory leak here and just below
1552 when we set 3 or more conditions; I still don't
1553 understand the store mechanism enough to know
1554 what's the safe way to free content from an earlier store.
1555 AFAICT, stores stack, so freeing an early stored item also stores
1556 all data alloc'd after it. If we knew conditions were adjacent,
1557 we could survive that, but we don't. So I *think* we need to take
1558 another bit from opt_type to indicate "malloced"; this seems like
1559 quite a hack, especially for this one case. It also means that
1560 we can't ever reclaim the store from the *first* condition.
1562 Because we only do this once, near process start-up, I'm prepared to
1563 let this slide for the time being, even though it rankles. */
1565 else if (ol->type & opt_rep_str)
1567 uschar sep = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1570 /* Strip trailing whitespace and seperators */
1571 for (cp = sptr + Ustrlen(sptr) - 1;
1572 cp >= sptr && (*cp == '\n' || *cp == '\t' || *cp == ' ' || *cp == sep);
1576 *str_target = string_copy_malloc(
1577 *str_target ? string_sprintf("%s%c%s", *str_target, sep, sptr)
1588 if (data_block == NULL)
1589 *((uschar **)(ol->value)) = sptr;
1591 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1593 if (type == opt_rewrite)
1598 rewrite_rule **chain;
1601 sprintf(CS name2, "*%.50s_rules", name);
1602 ol2 = find_option(name2, oltop, last);
1603 sprintf(CS name2, "*%.50s_flags", name);
1604 ol3 = find_option(name2, oltop, last);
1606 if (ol2 == NULL || ol3 == NULL)
1607 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1608 "rewrite rules not available for driver");
1610 if (data_block == NULL)
1612 chain = (rewrite_rule **)(ol2->value);
1613 flagptr = (int *)(ol3->value);
1617 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1618 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1621 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1624 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1626 chain = &(next->next);
1629 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1630 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1631 "non-header rewrite - not allowed at transport time -");
1635 /* If it was an expanded uid, see if there is any expansion to be
1636 done by checking for the presence of a $ character. If there is, save it
1637 in the corresponding *expand_user option field. Otherwise, fall through
1638 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1641 case opt_expand_uid:
1642 sprintf(CS name2, "*expand_%.50s", name);
1643 ol2 = find_option(name2, oltop, last);
1646 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1648 if (data_block == NULL)
1649 *((uschar **)(ol2->value)) = ss;
1651 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1655 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1661 /* Look up a fixed uid, and also make use of the corresponding gid
1662 if a passwd entry is returned and the gid has not been set. */
1665 if (!route_finduser(sptr, &pw, &uid))
1666 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1667 if (data_block == NULL)
1668 *((uid_t *)(ol->value)) = uid;
1670 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1672 /* Set the flag indicating a fixed value is set */
1674 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1676 /* Handle matching gid if we have a passwd entry: done by finding the
1677 same name with terminating "user" changed to "group"; if not found,
1678 ignore. Also ignore if the value is already set. */
1680 if (pw == NULL) break;
1681 Ustrcpy(name+Ustrlen(name)-4, "group");
1682 ol2 = find_option(name, oltop, last);
1683 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1684 (ol2->type & opt_mask) == opt_expand_gid))
1686 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1689 if (data_block == NULL)
1690 *((gid_t *)(ol2->value)) = pw->pw_gid;
1692 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1698 /* If it was an expanded gid, see if there is any expansion to be
1699 done by checking for the presence of a $ character. If there is, save it
1700 in the corresponding *expand_user option field. Otherwise, fall through
1701 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1704 case opt_expand_gid:
1705 sprintf(CS name2, "*expand_%.50s", name);
1706 ol2 = find_option(name2, oltop, last);
1709 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1711 if (data_block == NULL)
1712 *((uschar **)(ol2->value)) = ss;
1714 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1718 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1724 /* Handle freestanding gid */
1727 if (!route_findgroup(sptr, &gid))
1728 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1729 if (data_block == NULL)
1730 *((gid_t *)(ol->value)) = gid;
1732 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1733 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1736 /* If it was a uid list, look up each individual entry, and build
1737 a vector of uids, with a count in the first element. Put the vector
1738 in malloc store so we can free the string. (We are reading into
1739 permanent store already.) */
1747 uschar *op = expand_string (sptr);
1750 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1751 name, expand_string_message);
1754 if (*p != 0) count++;
1755 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1756 list = store_malloc(count*sizeof(uid_t));
1757 list[ptr++] = (uid_t)(count - 1);
1759 if (data_block == NULL)
1760 *((uid_t **)(ol->value)) = list;
1762 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1768 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1769 if (!route_finduser(big_buffer, NULL, &uid))
1770 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1777 /* If it was a gid list, look up each individual entry, and build
1778 a vector of gids, with a count in the first element. Put the vector
1779 in malloc store so we can free the string. (We are reading into permanent
1788 uschar *op = expand_string (sptr);
1791 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1792 name, expand_string_message);
1795 if (*p != 0) count++;
1796 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1797 list = store_malloc(count*sizeof(gid_t));
1798 list[ptr++] = (gid_t)(count - 1);
1800 if (data_block == NULL)
1801 *((gid_t **)(ol->value)) = list;
1803 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1809 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1810 if (!route_findgroup(big_buffer, &gid))
1811 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1819 /* Release store if the value of the string doesn't need to be kept. */
1821 if (freesptr) store_reset(reset_point);
1824 /* Expanded boolean: if no characters follow, or if there are no dollar
1825 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1826 save the string for later expansion in the alternate place. */
1828 case opt_expand_bool:
1829 if (*s != 0 && Ustrchr(s, '$') != 0)
1831 sprintf(CS name2, "*expand_%.50s", name);
1832 ol2 = find_option(name2, oltop, last);
1835 reset_point = sptr = read_string(s, name);
1836 if (data_block == NULL)
1837 *((uschar **)(ol2->value)) = sptr;
1839 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1846 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1847 look for yes/not/true/false. Some booleans are stored in a single bit in
1848 a single int. There's a special fudge for verify settings; without a suffix
1849 they set both xx_sender and xx_recipient. The table points to the sender
1850 value; search subsequently for the recipient. There's another special case:
1851 opt_bool_set also notes when a boolean has been set. */
1855 case opt_bool_verify:
1859 s = readconf_readname(name2, 64, s);
1860 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1862 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1864 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1865 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1866 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1867 US"for boolean option ", name);
1870 /* Handle single-bit type. */
1872 if (type == opt_bit)
1874 int bit = 1 << ((ol->type >> 16) & 31);
1875 int *ptr = (data_block == NULL)?
1876 (int *)(ol->value) :
1877 (int *)((uschar *)data_block + (long int)ol->value);
1878 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1882 /* Handle full BOOL types */
1884 if (data_block == NULL)
1885 *((BOOL *)(ol->value)) = boolvalue;
1887 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1891 if (type == opt_bool_verify)
1893 sprintf(CS name2, "%.50s_recipient", name + offset);
1894 ol2 = find_option(name2, oltop, last);
1897 if (data_block == NULL)
1898 *((BOOL *)(ol2->value)) = boolvalue;
1900 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1904 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1906 else if (type == opt_bool_set)
1908 sprintf(CS name2, "*set_%.50s", name + offset);
1909 ol2 = find_option(name2, oltop, last);
1912 if (data_block == NULL)
1913 *((BOOL *)(ol2->value)) = TRUE;
1915 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1924 inttype = US"octal ";
1926 /* Integer: a simple(ish) case; allow octal and hex formats, and
1927 suffixes K and M. The different types affect output, not input. */
1936 lvalue = strtol(CS s, CSS &endptr, intbase);
1939 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1942 if (errno != ERANGE)
1944 if (tolower(*endptr) == 'k')
1946 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1947 else lvalue *= 1024;
1950 else if (tolower(*endptr) == 'm')
1952 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1954 else lvalue *= 1024*1024;
1959 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1960 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1961 "absolute value of integer \"%s\" is too large (overflow)", s);
1963 while (isspace(*endptr)) endptr++;
1965 extra_chars_error(endptr, inttype, US"integer value for ", name);
1967 value = (int)lvalue;
1970 if (data_block == NULL)
1971 *((int *)(ol->value)) = value;
1973 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1976 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1983 value = strtol(CS s, CSS &endptr, intbase);
1986 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1989 if (errno != ERANGE)
1991 if (tolower(*endptr) == 'm')
1993 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1997 else if (tolower(*endptr) == 'k')
2003 value = (value + 512)/1024;
2007 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2008 "absolute value of integer \"%s\" is too large (overflow)", s);
2010 while (isspace(*endptr)) endptr++;
2012 extra_chars_error(endptr, inttype, US"integer value for ", name);
2015 if (data_block == NULL)
2016 *((int *)(ol->value)) = value;
2018 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2021 /* Fixed-point number: held to 3 decimal places. */
2024 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2025 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2026 "fixed-point number expected for %s", name);
2028 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2029 "integer \"%s\" is too large (overflow)", s);
2033 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2034 "integer \"%s\" is too large (overflow)", s);
2036 if (s[count] == '.')
2039 while (isdigit(s[++count]))
2041 value += (s[count] - '0') * d;
2046 while (isspace(s[count])) count++;
2049 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2051 if (data_block == NULL)
2052 *((int *)(ol->value)) = value;
2054 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2057 /* There's a special routine to read time values. */
2060 value = readconf_readtime(s, 0, FALSE);
2062 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2064 if (data_block == NULL)
2065 *((int *)(ol->value)) = value;
2067 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2070 /* A time list is a list of colon-separated times, with the first
2071 element holding the size of the list and the second the number of
2077 int *list = (data_block == NULL)?
2078 (int *)(ol->value) :
2079 (int *)((uschar *)data_block + (long int)(ol->value));
2081 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2084 uschar *snext = Ustrchr(s, ':');
2088 while (ss > s && isspace(ss[-1])) ss--;
2091 value = readconf_readtime(s, terminator, FALSE);
2093 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2095 if (count > 1 && value <= list[count])
2096 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2097 "time value out of order for %s", name);
2098 list[count+1] = value;
2099 if (snext == NULL) break;
2101 while (isspace(*s)) s++;
2104 if (count > list[0] - 2)
2105 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2107 if (count > 0 && list[2] == 0) count = 0;
2119 /*************************************************
2120 * Print a time value *
2121 *************************************************/
2124 Argument: a time value in seconds
2125 Returns: pointer to a fixed buffer containing the time as a string,
2126 in readconf_readtime() format
2130 readconf_printtime(int t)
2133 uschar *p = time_buffer;
2150 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2151 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2152 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2153 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2154 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2161 /*************************************************
2162 * Print an individual option value *
2163 *************************************************/
2165 /* This is used by the -bP option, so prints to the standard output.
2166 The entire options list is passed in as an argument, because some options come
2167 in pairs - typically uid/gid settings, which can either be explicit numerical
2168 values, or strings to be expanded later. If the numerical value is unset,
2169 search for "*expand_<name>" to see if there is a string equivalent.
2172 ol option entry, or NULL for an unknown option
2174 options_block NULL for main configuration options; otherwise points to
2175 a driver block; if the option doesn't have opt_public
2176 set, then options_block->options_block is where the item
2178 oltop points to the option list in which ol exists
2179 last one more than the offset of the last entry in optop
2180 no_labels do not show "foo = " at the start.
2186 print_ol(optionlist *ol, uschar *name, void *options_block,
2187 optionlist *oltop, int last, BOOL no_labels)
2200 printf("%s is not a known option\n", name);
2204 /* Non-admin callers cannot see options that have been flagged secure by the
2207 if (!admin_user && (ol->type & opt_secure) != 0)
2209 const char * const hidden = "<value not displayable>";
2211 printf("%s\n", hidden);
2213 printf("%s = %s\n", name, hidden);
2217 /* Else show the value of the option */
2220 if (options_block != NULL)
2222 if ((ol->type & opt_public) == 0)
2223 options_block = (void *)(((driver_instance *)options_block)->options_block);
2224 value = (void *)((uschar *)options_block + (long int)value);
2227 switch(ol->type & opt_mask)
2230 case opt_rewrite: /* Show the text value */
2231 s = *((uschar **)value);
2232 if (!no_labels) printf("%s = ", name);
2233 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2237 if (!no_labels) printf("%s = ", name);
2238 printf("%d\n", *((int *)value));
2243 int x = *((int *)value);
2244 if (x != 0 && (x & 1023) == 0)
2248 if ((x & 1023) == 0)
2253 if (!no_labels) printf("%s = ", name);
2254 printf("%d%c\n", x, c);
2258 if (!no_labels) printf("%s = ", name);
2266 int x = *((int *)value);
2267 if (!no_labels) printf("%s = ", name);
2268 if (x == 0) printf("0\n");
2269 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2270 else printf("%dK\n", x);
2275 if (!no_labels) printf("%s = ", name);
2276 printf("%#o\n", *((int *)value));
2279 /* Can be negative only when "unset", in which case integer */
2283 int x = *((int *)value);
2286 if (x < 0) printf("%s =\n", name); else
2288 if (!no_labels) printf("%s = ", name);
2289 printf("%d.", x/1000);
2302 /* If the numerical value is unset, try for the string value */
2304 case opt_expand_uid:
2305 if (! *get_set_flag(name, oltop, last, options_block))
2307 sprintf(CS name2, "*expand_%.50s", name);
2308 ol2 = find_option(name2, oltop, last);
2311 void *value2 = ol2->value;
2312 if (options_block != NULL)
2313 value2 = (void *)((uschar *)options_block + (long int)value2);
2314 s = *((uschar **)value2);
2315 if (!no_labels) printf("%s = ", name);
2316 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2321 /* Else fall through */
2324 if (!no_labels) printf("%s = ", name);
2325 if (! *get_set_flag(name, oltop, last, options_block))
2329 pw = getpwuid(*((uid_t *)value));
2331 printf("%ld\n", (long int)(*((uid_t *)value)));
2332 else printf("%s\n", pw->pw_name);
2336 /* If the numerical value is unset, try for the string value */
2338 case opt_expand_gid:
2339 if (! *get_set_flag(name, oltop, last, options_block))
2341 sprintf(CS name2, "*expand_%.50s", name);
2342 ol2 = find_option(name2, oltop, last);
2343 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2345 void *value2 = ol2->value;
2346 if (options_block != NULL)
2347 value2 = (void *)((uschar *)options_block + (long int)value2);
2348 s = *((uschar **)value2);
2349 if (!no_labels) printf("%s = ", name);
2350 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2355 /* Else fall through */
2358 if (!no_labels) printf("%s = ", name);
2359 if (! *get_set_flag(name, oltop, last, options_block))
2363 gr = getgrgid(*((int *)value));
2365 printf("%ld\n", (long int)(*((int *)value)));
2366 else printf("%s\n", gr->gr_name);
2371 uidlist = *((uid_t **)value);
2372 if (!no_labels) printf("%s =", name);
2373 if (uidlist != NULL)
2377 if (no_labels) sep = '\0';
2378 for (i = 1; i <= (int)(uidlist[0]); i++)
2380 uschar *name = NULL;
2381 pw = getpwuid(uidlist[i]);
2382 if (pw != NULL) name = US pw->pw_name;
2383 if (sep != '\0') printf("%c", sep);
2384 if (name != NULL) printf("%s", name);
2385 else printf("%ld", (long int)(uidlist[i]));
2393 gidlist = *((gid_t **)value);
2394 if (!no_labels) printf("%s =", name);
2395 if (gidlist != NULL)
2399 if (no_labels) sep = '\0';
2400 for (i = 1; i <= (int)(gidlist[0]); i++)
2402 uschar *name = NULL;
2403 gr = getgrgid(gidlist[i]);
2404 if (gr != NULL) name = US gr->gr_name;
2405 if (sep != '\0') printf("%c", sep);
2406 if (name != NULL) printf("%s", name);
2407 else printf("%ld", (long int)(gidlist[i]));
2415 if (!no_labels) printf("%s = ", name);
2416 printf("%s\n", readconf_printtime(*((int *)value)));
2422 int *list = (int *)value;
2423 if (!no_labels) printf("%s = ", name);
2424 for (i = 0; i < list[1]; i++)
2425 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2431 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2435 case opt_expand_bool:
2436 sprintf(CS name2, "*expand_%.50s", name);
2437 ol2 = find_option(name2, oltop, last);
2438 if (ol2 != NULL && ol2->value != NULL)
2440 void *value2 = ol2->value;
2441 if (options_block != NULL)
2442 value2 = (void *)((uschar *)options_block + (long int)value2);
2443 s = *((uschar **)value2);
2446 if (!no_labels) printf("%s = ", name);
2447 printf("%s\n", string_printing(s));
2450 /* s == NULL => string not set; fall through */
2456 case opt_bool_verify:
2458 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2465 /*************************************************
2466 * Print value from main configuration *
2467 *************************************************/
2469 /* This function, called as a result of encountering the -bP option,
2470 causes the value of any main configuration variable to be output if the
2471 second argument is NULL. There are some special values:
2473 all print all main configuration options
2474 configure_file print the name of the configuration file
2475 routers print the routers' configurations
2476 transports print the transports' configuration
2477 authenticators print the authenticators' configuration
2478 macros print the macros' configuration
2479 router_list print a list of router names
2480 transport_list print a list of transport names
2481 authenticator_list print a list of authentication mechanism names
2482 macro_list print a list of macro names
2483 +name print a named list item
2484 local_scan print the local_scan options
2486 If the second argument is not NULL, it must be one of "router", "transport",
2487 "authenticator" or "macro" in which case the first argument identifies the
2488 driver whose options are to be printed.
2491 name option name if type == NULL; else driver name
2492 type NULL or driver type name, as described above
2493 no_labels avoid the "foo = " at the start of an item
2499 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2501 BOOL names_only = FALSE;
2503 optionlist *ol2 = NULL;
2504 driver_instance *d = NULL;
2515 static uschar *types[] = { US"address", US"domain", US"host",
2517 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2518 &hostlist_anchor, &localpartlist_anchor };
2520 for (i = 0; i < 4; i++)
2522 t = tree_search(*(anchors[i]), name+1);
2527 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2529 printf("%slist %s = %s\n", types[i], name+1,
2530 ((namedlist_block *)(t->data.ptr))->string);
2535 printf("no address, domain, host, or local part list called \"%s\" "
2536 "exists\n", name+1);
2541 if (Ustrcmp(name, "configure_file") == 0)
2543 printf("%s\n", CS config_main_filename);
2547 if (Ustrcmp(name, "all") == 0)
2549 for (ol = optionlist_config;
2550 ol < optionlist_config + optionlist_config_size; ol++)
2552 if ((ol->type & opt_hidden) == 0)
2553 print_ol(ol, US ol->name, NULL,
2554 optionlist_config, optionlist_config_size,
2560 if (Ustrcmp(name, "local_scan") == 0)
2562 #ifndef LOCAL_SCAN_HAS_OPTIONS
2563 printf("local_scan() options are not supported\n");
2565 for (ol = local_scan_options;
2566 ol < local_scan_options + local_scan_options_count; ol++)
2568 print_ol(ol, US ol->name, NULL, local_scan_options,
2569 local_scan_options_count, no_labels);
2575 if (Ustrcmp(name, "routers") == 0)
2580 else if (Ustrcmp(name, "transports") == 0)
2582 type = US"transport";
2586 else if (Ustrcmp(name, "authenticators") == 0)
2588 type = US"authenticator";
2592 else if (Ustrcmp(name, "macros") == 0)
2598 else if (Ustrcmp(name, "router_list") == 0)
2605 else if (Ustrcmp(name, "transport_list") == 0)
2607 type = US"transport";
2612 else if (Ustrcmp(name, "authenticator_list") == 0)
2614 type = US"authenticator";
2619 else if (Ustrcmp(name, "macro_list") == 0)
2628 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2629 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2634 /* Handle the options for a router or transport. Skip options that are flagged
2635 as hidden. Some of these are options with names starting with '*', used for
2636 internal alternative representations of other options (which the printing
2637 function will sort out). Others are synonyms kept for backward compatibility.
2640 if (Ustrcmp(type, "router") == 0)
2642 d = (driver_instance *)routers;
2643 ol2 = optionlist_routers;
2644 size = optionlist_routers_size;
2646 else if (Ustrcmp(type, "transport") == 0)
2648 d = (driver_instance *)transports;
2649 ol2 = optionlist_transports;
2650 size = optionlist_transports_size;
2652 else if (Ustrcmp(type, "authenticator") == 0)
2654 d = (driver_instance *)auths;
2655 ol2 = optionlist_auths;
2656 size = optionlist_auths_size;
2659 else if (Ustrcmp(type, "macro") == 0)
2661 /* People store passwords in macros and they were previously not available
2662 for printing. So we have an admin_users restriction. */
2665 fprintf(stderr, "exim: permission denied\n");
2668 for (m = macros; m != NULL; m = m->next)
2670 if (name == NULL || Ustrcmp(name, m->name) == 0)
2673 printf("%s\n", CS m->name);
2675 printf("%s=%s\n", CS m->name, CS m->replacement);
2681 printf("%s %s not found\n", type, name);
2687 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2691 /* Either search for a given driver, or print all of them */
2693 for (; d != NULL; d = d->next)
2696 printf("\n%s %s:\n", d->name, type);
2697 else if (Ustrcmp(d->name, name) != 0) continue;
2699 for (ol = ol2; ol < ol2 + size; ol++)
2701 if ((ol->type & opt_hidden) == 0)
2702 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2705 for (ol = d->info->options;
2706 ol < d->info->options + *(d->info->options_count); ol++)
2708 if ((ol->type & opt_hidden) == 0)
2709 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2711 if (name != NULL) return;
2713 if (name != NULL) printf("%s %s not found\n", type, name);
2718 /*************************************************
2719 * Read a named list item *
2720 *************************************************/
2722 /* This function reads a name and a list (i.e. string). The name is used to
2723 save the list in a tree, sorted by its name. Each entry also has a number,
2724 which can be used for caching tests, but if the string contains any expansion
2725 items other than $key, the number is set negative to inhibit caching. This
2726 mechanism is used for domain, host, and address lists that are referenced by
2730 anchorp points to the tree anchor
2731 numberp points to the current number for this tree
2732 max the maximum number permitted
2733 s the text of the option line, starting immediately after the name
2735 tname the name of the list type, for messages
2741 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2744 BOOL forcecache = FALSE;
2747 namedlist_block *nb = store_get(sizeof(namedlist_block));
2749 if (Ustrncmp(s, "_cache", 6) == 0)
2756 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2758 if (*numberp >= max)
2759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2762 while (isspace(*s)) s++;
2764 while (isalnum(*s) || *s == '_') s++;
2765 t = store_get(sizeof(tree_node) + s-ss);
2766 Ustrncpy(t->name, ss, s-ss);
2768 while (isspace(*s)) s++;
2770 if (!tree_insertnode(anchorp, t))
2771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2772 "duplicate name \"%s\" for a named %s", t->name, tname);
2775 nb->number = *numberp;
2778 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2779 "missing '=' after \"%s\"", t->name);
2780 while (isspace(*s)) s++;
2781 nb->string = read_string(s, t->name);
2782 nb->cache_data = NULL;
2784 /* Check the string for any expansions; if any are found, mark this list
2785 uncacheable unless the user has explicited forced caching. */
2787 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2793 /*************************************************
2794 * Unpick data for a rate limit *
2795 *************************************************/
2797 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2801 s string, in the form t,b,f,l
2802 where t is the threshold (integer)
2803 b is the initial delay (time)
2804 f is the multiplicative factor (fixed point)
2805 k is the maximum time (time)
2806 threshold where to store threshold
2807 base where to store base in milliseconds
2808 factor where to store factor in milliseconds
2809 limit where to store limit
2811 Returns: nothing (panics on error)
2815 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2818 uschar bstring[16], lstring[16];
2820 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2821 factor, lstring) == 4)
2823 *base = readconf_readtime(bstring, 0, TRUE);
2824 *limit = readconf_readtime(lstring, 0, TRUE);
2825 if (*base >= 0 && *limit >= 0) return;
2827 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2833 /*************************************************
2834 * Drop privs for checking TLS config *
2835 *************************************************/
2837 /* We want to validate TLS options during readconf, but do not want to be
2838 root when we call into the TLS library, in case of library linkage errors
2839 which cause segfaults; before this check, those were always done as the Exim
2840 runtime user and it makes sense to continue with that.
2842 Assumes: tls_require_ciphers has been set, if it will be
2843 exim_user has been set, if it will be
2844 exim_group has been set, if it will be
2846 Returns: bool for "okay"; false will cause caller to immediately exit.
2851 tls_dropprivs_validate_require_cipher(void)
2853 const uschar *errmsg;
2856 void (*oldsignal)(int);
2858 oldsignal = signal(SIGCHLD, SIG_DFL);
2861 if ((pid = fork()) < 0)
2862 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2866 /* in some modes, will have dropped privilege already */
2868 exim_setugid(exim_uid, exim_gid, FALSE,
2869 US"calling tls_validate_require_cipher");
2871 errmsg = tls_validate_require_cipher();
2874 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2875 "tls_require_ciphers invalid: %s", errmsg);
2882 rc = waitpid(pid, &status, 0);
2883 } while (rc < 0 && errno == EINTR);
2886 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2889 signal(SIGCHLD, oldsignal);
2893 #endif /* SUPPORT_TLS */
2898 /*************************************************
2899 * Read main configuration options *
2900 *************************************************/
2902 /* This function is the first to be called for configuration reading. It
2903 opens the configuration file and reads general configuration settings until
2904 it reaches the end of the configuration section. The file is then left open so
2905 that the remaining configuration data can subsequently be read if needed for
2908 The configuration file must be owned either by root or exim, and be writeable
2909 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2910 in the config file, so the test is done on the compiled in values. A slight
2911 anomaly, to be carefully documented.
2913 The name of the configuration file is taken from a list that is included in the
2914 binary of Exim. It can be altered from the command line, but if that is done,
2915 root privilege is immediately withdrawn unless the caller is root or exim.
2916 The first file on the list that exists is used.
2918 For use on multiple systems that share file systems, first look for a
2919 configuration file whose name has the current node name on the end. If that is
2920 not found, try the generic name. For really contorted configurations, that run
2921 multiple Exims with different uid settings, first try adding the effective uid
2922 before the node name. These complications are going to waste resources on most
2923 systems. Therefore they are available only when requested by compile-time
2930 struct stat statbuf;
2931 uschar *s, *filename;
2932 uschar *list = config_main_filelist;
2934 /* Loop through the possible file names */
2936 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2939 /* Cut out all the fancy processing unless specifically wanted */
2941 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2942 uschar *suffix = filename + Ustrlen(filename);
2944 /* Try for the node-specific file if a node name exists */
2946 #ifdef CONFIGURE_FILE_USE_NODE
2948 if (uname(&uts) >= 0)
2950 #ifdef CONFIGURE_FILE_USE_EUID
2951 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2952 config_file = Ufopen(filename, "rb");
2953 if (config_file == NULL)
2954 #endif /* CONFIGURE_FILE_USE_EUID */
2956 sprintf(CS suffix, ".%.256s", uts.nodename);
2957 config_file = Ufopen(filename, "rb");
2960 #endif /* CONFIGURE_FILE_USE_NODE */
2962 /* Otherwise, try the generic name, possibly with the euid added */
2964 #ifdef CONFIGURE_FILE_USE_EUID
2965 if (config_file == NULL)
2967 sprintf(CS suffix, ".%ld", (long int)original_euid);
2968 config_file = Ufopen(filename, "rb");
2970 #endif /* CONFIGURE_FILE_USE_EUID */
2972 /* Finally, try the unadorned name */
2974 if (config_file == NULL)
2977 config_file = Ufopen(filename, "rb");
2979 #else /* if neither defined */
2981 /* This is the common case when the fancy processing is not included. */
2983 config_file = Ufopen(filename, "rb");
2986 /* If the file does not exist, continue to try any others. For any other
2987 error, break out (and die). */
2989 if (config_file != NULL || errno != ENOENT) break;
2992 /* On success, save the name for verification; config_filename is used when
2993 logging configuration errors (it changes for .included files) whereas
2994 config_main_filename is the name shown by -bP. Failure to open a configuration
2995 file is a serious disaster. */
2997 if (config_file != NULL)
2999 config_filename = config_main_filename = string_copy(filename);
3003 if (filename == NULL)
3004 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3005 "%s", config_main_filelist);
3007 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3008 "configuration file %s", filename));
3011 /* Check the status of the file we have opened, if we have retained root
3012 privileges and the file isn't /dev/null (which *should* be 0666). */
3014 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3016 if (fstat(fileno(config_file), &statbuf) != 0)
3017 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3020 if ((statbuf.st_uid != root_uid /* owner not root */
3021 #ifdef CONFIGURE_OWNER
3022 && statbuf.st_uid != config_uid /* owner not the special one */
3025 (statbuf.st_gid != root_gid /* group not root & */
3026 #ifdef CONFIGURE_GROUP
3027 && statbuf.st_gid != config_gid /* group not the special one */
3029 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3031 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3033 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3034 "wrong owner, group, or mode", big_buffer);
3037 /* Process the main configuration settings. They all begin with a lower case
3038 letter. If we see something starting with an upper case letter, it is taken as
3039 a macro definition. */
3041 while ((s = get_config_line()) != NULL)
3043 if (isupper(s[0])) read_macro_assignment(s);
3045 else if (Ustrncmp(s, "domainlist", 10) == 0)
3046 read_named_list(&domainlist_anchor, &domainlist_count,
3047 MAX_NAMED_LIST, s+10, US"domain list");
3049 else if (Ustrncmp(s, "hostlist", 8) == 0)
3050 read_named_list(&hostlist_anchor, &hostlist_count,
3051 MAX_NAMED_LIST, s+8, US"host list");
3053 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3054 read_named_list(&addresslist_anchor, &addresslist_count,
3055 MAX_NAMED_LIST, s+11, US"address list");
3057 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3058 read_named_list(&localpartlist_anchor, &localpartlist_count,
3059 MAX_NAMED_LIST, s+13, US"local part list");
3062 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3063 NULL, US"main option \"%s\" unknown");
3067 /* If local_sender_retain is set, local_from_check must be unset. */
3069 if (local_sender_retain && local_from_check)
3070 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3071 "local_sender_retain are set; this combination is not allowed");
3073 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3076 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3078 /* The max retry interval must not be greater than 24 hours. */
3080 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3082 /* remote_max_parallel must be > 0 */
3084 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3086 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3087 start of a new SMTP message. */
3089 freeze_tell_config = freeze_tell;
3091 /* The primary host name may be required for expansion of spool_directory
3092 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3093 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3094 canonize it. Some people like upper case letters in their host names, so we
3095 don't force the case. */
3097 if (primary_hostname == NULL)
3101 if (uname(&uts) < 0)
3102 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3103 hostname = US uts.nodename;
3105 if (Ustrchr(hostname, '.') == NULL)
3108 struct hostent *hostdata;
3111 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3112 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
3122 #if HAVE_GETIPNODEBYNAME
3124 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3126 hostdata = gethostbyname2(CS hostname, af);
3129 hostdata = gethostbyname(CS hostname);
3132 if (hostdata != NULL)
3134 hostname = US hostdata->h_name;
3138 if (af == AF_INET) break;
3143 primary_hostname = string_copy(hostname);
3146 /* Set up default value for smtp_active_hostname */
3148 smtp_active_hostname = primary_hostname;
3150 /* If spool_directory wasn't set in the build-time configuration, it must have
3151 got set above. Of course, writing to the log may not work if log_file_path is
3152 not set, but it will at least get to syslog or somewhere, with any luck. */
3154 if (*spool_directory == 0)
3155 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3158 /* Expand the spool directory name; it may, for example, contain the primary
3159 host name. Same comment about failure. */
3161 s = expand_string(spool_directory);
3163 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3164 "\"%s\": %s", spool_directory, expand_string_message);
3165 spool_directory = s;
3167 /* Expand log_file_path, which must contain "%s" in any component that isn't
3168 the null string or "syslog". It is also allowed to contain one instance of %D
3169 or %M. However, it must NOT contain % followed by anything else. */
3171 if (*log_file_path != 0)
3174 int sep = ':'; /* Fixed for log file path */
3175 s = expand_string(log_file_path);
3177 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3178 "\"%s\": %s", log_file_path, expand_string_message);
3181 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3184 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3185 t = Ustrstr(sss, "%s");
3187 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3188 "contain \"%%s\"", sss);
3190 t = Ustrchr(sss, '%');
3193 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3194 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3195 "unexpected \"%%\" character", s);
3202 /* Interpret syslog_facility into an integer argument for 'ident' param to
3203 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3206 if (syslog_facility_str != NULL)
3209 uschar *s = syslog_facility_str;
3211 if ((Ustrlen(syslog_facility_str) >= 4) &&
3212 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3215 for (i = 0; i < syslog_list_size; i++)
3217 if (strcmpic(s, syslog_list[i].name) == 0)
3219 syslog_facility = syslog_list[i].value;
3224 if (i >= syslog_list_size)
3226 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3227 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3231 /* Expand pid_file_path */
3233 if (*pid_file_path != 0)
3235 s = expand_string(pid_file_path);
3237 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3238 "\"%s\": %s", pid_file_path, expand_string_message);
3242 /* Set default value of process_log_path */
3244 if (process_log_path == NULL || *process_log_path =='\0')
3245 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3247 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3250 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3252 /* Unpick the SMTP rate limiting options, if set */
3254 if (smtp_ratelimit_mail != NULL)
3256 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3257 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3260 if (smtp_ratelimit_rcpt != NULL)
3262 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3263 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3266 /* The qualify domains default to the primary host name */
3268 if (qualify_domain_sender == NULL)
3269 qualify_domain_sender = primary_hostname;
3270 if (qualify_domain_recipient == NULL)
3271 qualify_domain_recipient = qualify_domain_sender;
3273 /* Setting system_filter_user in the configuration sets the gid as well if a
3274 name is given, but a numerical value does not. */
3276 if (system_filter_uid_set && !system_filter_gid_set)
3278 struct passwd *pw = getpwuid(system_filter_uid);
3280 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3281 (long int)system_filter_uid);
3282 system_filter_gid = pw->pw_gid;
3283 system_filter_gid_set = TRUE;
3286 /* If the errors_reply_to field is set, check that it is syntactically valid
3287 and ensure it contains a domain. */
3289 if (errors_reply_to != NULL)
3292 int start, end, domain;
3293 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3294 &start, &end, &domain, FALSE);
3296 if (recipient == NULL)
3297 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3298 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3301 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3302 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3305 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3306 smtp_accept_max must also be set. */
3308 if (smtp_accept_max == 0 &&
3309 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3310 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3311 "smtp_accept_max must be set if smtp_accept_queue or "
3312 "smtp_accept_max_per_host is set");
3314 /* Set up the host number if anything is specified. It is an expanded string
3315 so that it can be computed from the host name, for example. We do this last
3316 so as to ensure that everything else is set up before the expansion. */
3318 if (host_number_string != NULL)
3322 uschar *s = expand_string(host_number_string);
3324 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3325 "failed to expand localhost_number \"%s\": %s",
3326 host_number_string, expand_string_message);
3327 n = Ustrtol(s, &end, 0);
3328 while (isspace(*end)) end++;
3330 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3331 "localhost_number value is not a number: %s", s);
3332 if (n > LOCALHOST_MAX)
3333 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3334 "localhost_number is greater than the maximum allowed value (%d)",
3340 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3342 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3343 tls_verify_certificates == NULL)
3344 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3345 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3346 (tls_verify_hosts != NULL)? "" : "try_");
3348 /* This also checks that the library linkage is working and we can call
3349 routines in it, so call even if tls_require_ciphers is unset */
3350 if (!tls_dropprivs_validate_require_cipher())
3353 /* Magic number: at time of writing, 1024 has been the long-standing value
3354 used by so many clients, and what Exim used to use always, that it makes
3355 sense to just min-clamp this max-clamp at that. */
3356 if (tls_dh_max_bits < 1024)
3357 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3358 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3360 /* If openssl_options is set, validate it */
3361 if (openssl_options != NULL)
3364 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3365 "openssl_options is set but we're using GnuTLS");
3368 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3369 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3370 "openssl_options parse error: %s", openssl_options);
3378 /*************************************************
3379 * Initialize one driver *
3380 *************************************************/
3382 /* This is called once the driver's generic options, if any, have been read.
3383 We can now find the driver, set up defaults for the private options, and
3384 unset any "set" bits in the private options table (which might have been
3385 set by another incarnation of the same driver).
3388 d pointer to driver instance block, with generic
3390 drivers_available vector of available drivers
3391 size_of_info size of each block in drivers_available
3392 class class of driver, for error message
3394 Returns: pointer to the driver info block
3397 static driver_info *
3398 init_driver(driver_instance *d, driver_info *drivers_available,
3399 int size_of_info, uschar *class)
3403 for (dd = drivers_available; dd->driver_name[0] != 0;
3404 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3406 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3409 int len = dd->options_len;
3411 d->options_block = store_get(len);
3412 memcpy(d->options_block, dd->options_block, len);
3413 for (i = 0; i < *(dd->options_count); i++)
3414 dd->options[i].type &= ~opt_set;
3419 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3420 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3422 return NULL; /* never obeyed */
3428 /*************************************************
3429 * Initialize driver list *
3430 *************************************************/
3432 /* This function is called for routers, transports, and authentication
3433 mechanisms. It reads the data from the current point in the configuration file
3434 up to the end of the section, and sets up a chain of instance blocks according
3435 to the file's contents. The file will already have been opened by a call to
3436 readconf_main, and must be left open for subsequent reading of further data.
3438 Any errors cause a panic crash. Note that the blocks with names driver_info and
3439 driver_instance must map the first portions of all the _info and _instance
3440 blocks for this shared code to work.
3443 class "router", "transport", or "authenticator"
3444 anchor &routers, &transports, &auths
3445 drivers_available available drivers
3446 size_of_info size of each info block
3447 instance_default points to default data for an instance
3448 instance_size size of instance block
3449 driver_optionlist generic option list
3450 driver_optionlist_count count of generic option list
3456 readconf_driver_init(
3458 driver_instance **anchor,
3459 driver_info *drivers_available,
3461 void *instance_default,
3463 optionlist *driver_optionlist,
3464 int driver_optionlist_count)
3466 driver_instance **p = anchor;
3467 driver_instance *d = NULL;
3470 while ((buffer = get_config_line()) != NULL)
3475 /* Read the first name on the line and test for the start of a new driver. A
3476 macro definition indicates the end of the previous driver. If this isn't the
3477 start of a new driver, the line will be re-read. */
3479 s = readconf_readname(name, sizeof(name), buffer);
3481 /* Handle macro definition, first finishing off the initialization of the
3482 previous driver, if any. */
3484 if (isupper(*name) && *s == '=')
3488 if (d->driver_name == NULL)
3489 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3490 "no driver defined for %s \"%s\"", class, d->name);
3494 read_macro_assignment(buffer);
3498 /* If the line starts with a name terminated by a colon, we are at the
3499 start of the definition of a new driver. The rest of the line must be
3506 /* Finish off initializing the previous driver. */
3510 if (d->driver_name == NULL)
3511 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3512 "no driver defined for %s \"%s\"", class, d->name);
3516 /* Check that we haven't already got a driver of this name */
3518 for (d = *anchor; d != NULL; d = d->next)
3519 if (Ustrcmp(name, d->name) == 0)
3520 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3521 "there are two %ss called \"%s\"", class, name);
3523 /* Set up a new driver instance data block on the chain, with
3524 its default values installed. */
3526 d = store_get(instance_size);
3527 memcpy(d, instance_default, instance_size);
3530 d->name = string_copy(name);
3532 /* Clear out the "set" bits in the generic options */
3534 for (i = 0; i < driver_optionlist_count; i++)
3535 driver_optionlist[i].type &= ~opt_set;
3537 /* Check nothing more on this line, then do the next loop iteration. */
3539 while (isspace(*s)) s++;
3540 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3544 /* Not the start of a new driver. Give an error if we have not set up a
3545 current driver yet. */
3547 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3548 "%s name missing", class);
3550 /* First look to see if this is a generic option; if it is "driver",
3551 initialize the driver. If is it not a generic option, we can look for a
3552 private option provided that the driver has been previously set up. */
3554 if (readconf_handle_option(buffer, driver_optionlist,
3555 driver_optionlist_count, d, NULL))
3557 if (d->info == NULL && d->driver_name != NULL)
3558 init_driver(d, drivers_available, size_of_info, class);
3561 /* Handle private options - pass the generic block because some may
3562 live therein. A flag with each option indicates if it is in the public
3565 else if (d->info != NULL)
3567 readconf_handle_option(buffer, d->info->options,
3568 *(d->info->options_count), d, US"option \"%s\" unknown");
3571 /* The option is not generic and the driver name has not yet been given. */
3573 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3574 "(\"driver\" must be specified before any private options)", name);
3577 /* Run the initialization function for the final driver. */
3581 if (d->driver_name == NULL)
3582 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3583 "no driver defined for %s \"%s\"", class, d->name);
3590 /*************************************************
3591 * Check driver dependency *
3592 *************************************************/
3594 /* This function is passed a driver instance and a string. It checks whether
3595 any of the string options for the driver contains the given string as an
3599 d points to a driver instance block
3600 s the string to search for
3602 Returns: TRUE if a dependency is found
3606 readconf_depends(driver_instance *d, uschar *s)
3608 int count = *(d->info->options_count);
3612 for (ol = d->info->options; ol < d->info->options + count; ol++)
3614 void *options_block;
3616 int type = ol->type & opt_mask;
3617 if (type != opt_stringptr) continue;
3618 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3619 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3620 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3622 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3623 isalnum(ss[Ustrlen(s)])) continue;
3624 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3625 d->name, ol->name, s);
3630 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3637 /*************************************************
3638 * Decode an error type for retries *
3639 *************************************************/
3641 /* This function is global because it is also called from the main
3642 program when testing retry information. It decodes strings such as "quota_7d"
3643 into numerical error codes.
3646 pp points to start of text
3647 p points past end of text
3648 basic_errno points to an int to receive the main error number
3649 more_errno points to an int to receive the secondary error data
3651 Returns: NULL if decoded correctly; else points to error text
3655 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3659 while (q < p && *q != '_') q++;
3662 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3664 *basic_errno = ERRNO_EXIMQUOTA;
3665 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3666 return US"bad time value";
3669 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3671 *basic_errno = ECONNREFUSED;
3674 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3675 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3676 else return US"A or MX expected after \"refused\"";
3680 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3682 *basic_errno = ETIMEDOUT;
3686 int xlen = p - q - 1;
3689 static uschar *extras[] =
3690 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3691 static int values[] =
3692 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3694 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3696 if (strncmpic(x, extras[i], xlen) == 0)
3698 *more_errno = values[i];
3703 if (i >= sizeof(extras)/sizeof(uschar *))
3705 if (strncmpic(x, US"DNS", xlen) == 0)
3707 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3708 "available in retry rules (it has never worked) - treated as "
3711 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3716 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3717 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3718 strncmpic(pp, US"data_4", 6) == 0)
3721 int x = 255; /* means "any 4xx code" */
3722 if (p != pp + 8) bad = TRUE; else
3724 int a = pp[6], b = pp[7];
3728 if (isdigit(b)) x += b - '0';
3729 else if (b == 'x') x += 100;
3732 else if (a != 'x' || b != 'x') bad = TRUE;
3736 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3737 "x is literal and d is any digit", pp);
3739 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3740 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3741 *more_errno = x << 8;
3744 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3745 strncmpic(q+1, US"failed", p-q-1) == 0)
3746 *basic_errno = ERRNO_AUTHFAIL;
3748 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3749 *basic_errno = ERRNO_SMTPCLOSED;
3751 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3752 *basic_errno = ERRNO_TLSREQUIRED;
3754 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3755 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3763 /*************************************************
3764 * Read retry information *
3765 *************************************************/
3767 /* Each line of retry information contains:
3769 . A domain name pattern or an address pattern;
3771 . An error name, possibly with additional data, or *;
3773 . An optional sequence of retry items, each consisting of an identifying
3774 letter, a cutoff time, and optional parameters.
3776 All this is decoded and placed into a control block. */
3779 /* Subroutine to read an argument, preceded by a comma and terminated
3780 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3781 1 = fixed point number (returned *1000).
3784 paddr pointer to pointer to current character; updated
3785 type 0 => read a time; 1 => read a fixed point number
3787 Returns: time in seconds or fixed point number * 1000
3791 retry_arg(uschar **paddr, int type)
3796 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3798 while (isspace(*p)) p++;
3800 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3802 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3809 return readconf_readtime(pp, *p, FALSE);
3811 return readconf_readfixed(pp, *p);
3813 return 0; /* Keep picky compilers happy */
3816 /* The function proper */
3819 readconf_retries(void)
3821 retry_config **chain = &retries;
3825 while ((p = get_config_line()) != NULL)
3827 retry_rule **rchain;
3830 next = store_get(sizeof(retry_config));
3833 chain = &(next->next);
3834 next->basic_errno = next->more_errno = 0;
3835 next->senders = NULL;
3837 rchain = &(next->rules);
3839 next->pattern = string_dequote(&p);
3840 while (isspace(*p)) p++;
3842 while (mac_isgraph(*p)) p++;
3843 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3844 "missing error type in retry rule");
3846 /* Test error names for things we understand. */
3848 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3849 &(next->more_errno))) != NULL)
3850 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3852 /* There may be an optional address list of senders to be used as another
3853 constraint on the rule. This was added later, so the syntax is a bit of a
3854 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3857 while (isspace(*p)) p++;
3858 if (Ustrncmp(p, "senders", 7) == 0)
3861 while (isspace(*p)) p++;
3862 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3863 "\"=\" expected after \"senders\" in retry rule");
3864 while (isspace(*p)) p++;
3865 next->senders = string_dequote(&p);
3868 /* Now the retry rules. Keep the maximum timeout encountered. */
3870 while (isspace(*p)) p++;
3874 retry_rule *rule = store_get(sizeof(retry_rule));
3876 rchain = &(rule->next);
3878 rule->rule = toupper(*p++);
3879 rule->timeout = retry_arg(&p, 0);
3880 if (rule->timeout > retry_maximum_timeout)
3881 retry_maximum_timeout = rule->timeout;
3885 case 'F': /* Fixed interval */
3886 rule->p1 = retry_arg(&p, 0);
3889 case 'G': /* Geometrically increasing intervals */
3890 case 'H': /* Ditto, but with randomness */
3891 rule->p1 = retry_arg(&p, 0);
3892 rule->p2 = retry_arg(&p, 1);
3896 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3900 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3901 (rule->rule != 'F' && rule->p2 < 1000))
3902 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3903 "bad parameters for retry rule");
3905 while (isspace(*p)) p++;
3909 while (isspace(*p)) p++;
3912 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3919 /*************************************************
3920 * Initialize authenticators *
3921 *************************************************/
3923 /* Read the authenticators section of the configuration file.
3932 auth_instance *au, *bu;
3933 readconf_driver_init(US"authenticator",
3934 (driver_instance **)(&auths), /* chain anchor */
3935 (driver_info *)auths_available, /* available drivers */
3936 sizeof(auth_info), /* size of info block */
3937 &auth_defaults, /* default values for generic options */
3938 sizeof(auth_instance), /* size of instance block */
3939 optionlist_auths, /* generic options */
3940 optionlist_auths_size);
3942 for (au = auths; au != NULL; au = au->next)
3944 if (au->public_name == NULL)
3945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3946 "the %s authenticator", au->name);
3947 for (bu = au->next; bu != NULL; bu = bu->next)
3949 if (strcmpic(au->public_name, bu->public_name) == 0)
3951 if ((au->client && bu->client) || (au->server && bu->server))
3952 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3953 "(%s and %s) have the same public name (%s)",
3954 (au->client)? US"client" : US"server", au->name, bu->name,
3964 /*************************************************
3965 * Read ACL information *
3966 *************************************************/
3968 /* If this run of Exim is not doing something that involves receiving a
3969 message, we can just skip over the ACL information. No need to parse it.
3971 First, we have a function for acl_read() to call back to get the next line. We
3972 need to remember the line we passed, because at the end it will contain the
3973 name of the next ACL. */
3975 static uschar *acl_line;
3980 acl_line = get_config_line();
3985 /* Now the main function:
3996 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3999 acl_line = get_config_line();
4001 while(acl_line != NULL)
4007 p = readconf_readname(name, sizeof(name), acl_line);
4008 if (isupper(*name) && *p == '=')
4010 read_macro_assignment(acl_line);
4011 acl_line = get_config_line();
4015 if (*p != ':' || name[0] == 0)
4016 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4018 node = store_get(sizeof(tree_node) + Ustrlen(name));
4019 Ustrcpy(node->name, name);
4020 if (!tree_insertnode(&acl_anchor, node))
4021 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4022 "there are two ACLs called \"%s\"", name);
4024 node->data.ptr = acl_read(acl_callback, &error);
4026 if (node->data.ptr == NULL && error != NULL)
4027 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4033 /*************************************************
4034 * Read configuration for local_scan() *
4035 *************************************************/
4037 /* This function is called after "begin local_scan" is encountered in the
4038 configuration file. If the local_scan() function allows for configuration
4039 options, we can process them. Otherwise, we expire in a panic.
4046 local_scan_init(void)
4048 #ifndef LOCAL_SCAN_HAS_OPTIONS
4049 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4050 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4054 while ((p = get_config_line()) != NULL)
4056 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4057 NULL, US"local_scan option \"%s\" unknown");
4064 /*************************************************
4065 * Read rest of configuration (after main) *
4066 *************************************************/
4068 /* This function reads the rest of the runtime configuration, after the main
4069 configuration. It is called only when actually needed. Each subsequent section
4070 of the configuration starts with a line of the form
4074 where the name is "routers", "transports", etc. A section is terminated by
4075 hitting the next "begin" line, and the next name is left in next_section.
4076 Because it may confuse people as to whether the names are singular or plural,
4077 we add "s" if it's missing. There is always enough room in next_section for
4078 this. This function is basically just a switch.
4084 static uschar *section_list[] = {
4098 while(next_section[0] != 0)
4102 int last = sizeof(section_list) / sizeof(uschar *);
4104 int n = Ustrlen(next_section);
4106 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4110 int c = strcmpic(next_section, section_list[mid]);
4112 if (c > 0) first = mid + 1; else last = mid;
4114 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4115 "\"%.*s\" is not a known configuration section name", n, next_section);
4116 mid = (last + first)/2;
4120 if (((had ^= bit) & bit) == 0)
4121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4122 "\"%.*s\" section is repeated in the configuration file", n,
4127 case 0: readconf_acl(); break;
4128 case 1: auths_init(); break;
4129 case 2: local_scan_init(); break;
4130 case 3: readconf_retries(); break;
4131 case 4: readconf_rewrites(); break;
4132 case 5: route_init(); break;
4133 case 6: transport_init(); break;
4137 (void)fclose(config_file);
4142 /* End of readconf.c */