1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
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. */
15 # include "macro_predef.h"
18 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
21 static uschar * syslog_facility_str;
22 static void fn_smtp_receive_timeout(const uschar *, const uschar *, unsigned);
24 /*************************************************
25 * Main configuration options *
26 *************************************************/
28 /* The list of options that can be set in the main configuration file. This
29 must be in alphabetic order because it is searched by binary chop. */
31 static optionlist optionlist_config[] = {
32 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
33 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
34 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
35 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
36 { "accept_8bitmime", opt_bool, &accept_8bitmime },
37 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
38 #ifdef WITH_CONTENT_SCAN
39 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
41 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
42 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
43 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
44 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
46 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
49 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
51 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
52 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
53 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
54 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
55 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
56 #ifdef WITH_CONTENT_SCAN
57 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
59 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
60 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
61 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
62 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
64 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
66 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
67 { "add_environment", opt_stringptr, &add_environment },
68 { "admin_groups", opt_gidlist, &admin_groups },
69 { "allow_domain_literals", opt_bool, &allow_domain_literals },
70 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
71 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
72 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
73 { "auto_thaw", opt_time, &auto_thaw },
74 #ifdef WITH_CONTENT_SCAN
75 { "av_scanner", opt_stringptr, &av_scanner },
77 { "bi_command", opt_stringptr, &bi_command },
78 #ifdef EXPERIMENTAL_BRIGHTMAIL
79 { "bmi_config_file", opt_stringptr, &bmi_config_file },
81 { "bounce_message_file", opt_stringptr, &bounce_message_file },
82 { "bounce_message_text", opt_stringptr, &bounce_message_text },
83 { "bounce_return_body", opt_bool, &bounce_return_body },
84 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
85 { "bounce_return_message", opt_bool, &bounce_return_message },
86 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
87 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
88 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
89 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
90 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
91 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
92 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
93 { "check_log_inodes", opt_int, &check_log_inodes },
94 { "check_log_space", opt_Kint, &check_log_space },
95 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
96 { "check_spool_inodes", opt_int, &check_spool_inodes },
97 { "check_spool_space", opt_Kint, &check_spool_space },
98 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
99 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
100 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
101 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
102 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
103 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
104 #ifdef EXPERIMENTAL_DCC
105 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
106 { "dccifd_address", opt_stringptr, &dccifd_address },
107 { "dccifd_options", opt_stringptr, &dccifd_options },
109 { "debug_store", opt_bool, &debug_store },
110 { "delay_warning", opt_timelist, &delay_warning },
111 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
112 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
113 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
114 { "delivery_date_remove", opt_bool, &delivery_date_remove },
115 #ifdef ENABLE_DISABLE_FSYNC
116 { "disable_fsync", opt_bool, &disable_fsync },
118 { "disable_ipv6", opt_bool, &disable_ipv6 },
120 { "dkim_verify_hashes", opt_stringptr, &dkim_verify_hashes },
121 { "dkim_verify_keytypes", opt_stringptr, &dkim_verify_keytypes },
122 { "dkim_verify_minimal", opt_bool, &dkim_verify_minimal },
123 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
126 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
127 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
128 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
130 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
131 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
132 { "dns_cname_loops", opt_int, &dns_cname_loops },
133 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
134 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
135 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
136 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
137 { "dns_retrans", opt_time, &dns_retrans },
138 { "dns_retry", opt_int, &dns_retry },
139 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
140 { "dns_use_edns0", opt_int, &dns_use_edns0 },
141 /* This option is now a no-op, retained for compatibility */
142 { "drop_cr", opt_bool, &drop_cr },
143 /*********************************************************/
144 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
145 { "dsn_from", opt_stringptr, &dsn_from },
146 { "envelope_to_remove", opt_bool, &envelope_to_remove },
147 { "errors_copy", opt_stringptr, &errors_copy },
148 { "errors_reply_to", opt_stringptr, &errors_reply_to },
149 #ifndef DISABLE_EVENT
150 { "event_action", opt_stringptr, &event_action },
152 { "exim_group", opt_gid, &exim_gid },
153 { "exim_path", opt_stringptr, &exim_path },
154 { "exim_user", opt_uid, &exim_uid },
155 { "exim_version", opt_stringptr, &version_string },
156 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
157 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
158 { "finduser_retries", opt_int, &finduser_retries },
159 { "freeze_tell", opt_stringptr, &freeze_tell },
160 { "gecos_name", opt_stringptr, &gecos_name },
161 { "gecos_pattern", opt_stringptr, &gecos_pattern },
163 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
164 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
166 { "header_line_maxsize", opt_int, &header_line_maxsize },
167 { "header_maxsize", opt_int, &header_maxsize },
168 { "headers_charset", opt_stringptr, &headers_charset },
169 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
170 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
171 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
172 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
173 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
174 { "hold_domains", opt_stringptr, &hold_domains },
175 { "host_lookup", opt_stringptr, &host_lookup },
176 { "host_lookup_order", opt_stringptr, &host_lookup_order },
177 { "host_reject_connection", opt_stringptr, &host_reject_connection },
178 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
180 { "hosts_proxy", opt_stringptr, &hosts_proxy },
182 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
184 { "ibase_servers", opt_stringptr, &ibase_servers },
186 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
187 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
188 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
189 { "keep_environment", opt_stringptr, &keep_environment },
190 { "keep_malformed", opt_time, &keep_malformed },
192 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
193 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
194 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
195 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
196 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
197 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
198 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
199 { "ldap_start_tls", opt_bool, &eldap_start_tls },
200 { "ldap_version", opt_int, &eldap_version },
202 { "local_from_check", opt_bool, &local_from_check },
203 { "local_from_prefix", opt_stringptr, &local_from_prefix },
204 { "local_from_suffix", opt_stringptr, &local_from_suffix },
205 { "local_interfaces", opt_stringptr, &local_interfaces },
206 #ifdef HAVE_LOCAL_SCAN
207 { "local_scan_timeout", opt_time, &local_scan_timeout },
209 { "local_sender_retain", opt_bool, &local_sender_retain },
210 { "localhost_number", opt_stringptr, &host_number_string },
211 { "log_file_path", opt_stringptr, &log_file_path },
212 { "log_selector", opt_stringptr, &log_selector_string },
213 { "log_timezone", opt_bool, &log_timezone },
214 { "lookup_open_max", opt_int, &lookup_open_max },
215 { "max_username_length", opt_int, &max_username_length },
216 { "message_body_newlines", opt_bool, &message_body_newlines },
217 { "message_body_visible", opt_mkint, &message_body_visible },
218 { "message_id_header_domain", opt_stringptr, &message_id_domain },
219 { "message_id_header_text", opt_stringptr, &message_id_text },
220 { "message_logs", opt_bool, &message_logs },
221 { "message_size_limit", opt_stringptr, &message_size_limit },
222 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
223 { "move_frozen_messages", opt_bool, &move_frozen_messages },
225 { "mua_wrapper", opt_bool, &mua_wrapper },
227 { "mysql_servers", opt_stringptr, &mysql_servers },
229 { "never_users", opt_uidlist, &never_users },
231 { "openssl_options", opt_stringptr, &openssl_options },
234 { "oracle_servers", opt_stringptr, &oracle_servers },
236 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
238 { "perl_at_start", opt_bool, &opt_perl_at_start },
239 { "perl_startup", opt_stringptr, &opt_perl_startup },
240 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
243 { "pgsql_servers", opt_stringptr, &pgsql_servers },
245 { "pid_file_path", opt_stringptr, &pid_file_path },
246 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
247 #ifndef DISABLE_PIPE_CONNECT
248 { "pipelining_connect_advertise_hosts", opt_stringptr,
249 &pipe_connect_advertise_hosts },
252 { "prdr_enable", opt_bool, &prdr_enable },
254 { "preserve_message_logs", opt_bool, &preserve_message_logs },
255 { "primary_hostname", opt_stringptr, &primary_hostname },
256 { "print_topbitchars", opt_bool, &print_topbitchars },
257 { "process_log_path", opt_stringptr, &process_log_path },
258 { "prod_requires_admin", opt_bool, &prod_requires_admin },
259 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
260 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
261 { "queue_domains", opt_stringptr, &queue_domains },
262 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
263 { "queue_only", opt_bool, &queue_only },
264 { "queue_only_file", opt_stringptr, &queue_only_file },
265 { "queue_only_load", opt_fixed, &queue_only_load },
266 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
267 { "queue_only_override", opt_bool, &queue_only_override },
268 { "queue_run_in_order", opt_bool, &queue_run_in_order },
269 { "queue_run_max", opt_stringptr, &queue_run_max },
270 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
271 { "receive_timeout", opt_time, &receive_timeout },
272 { "received_header_text", opt_stringptr, &received_header_text },
273 { "received_headers_max", opt_int, &received_headers_max },
274 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
275 { "recipients_max", opt_int, &recipients_max },
276 { "recipients_max_reject", opt_bool, &recipients_max_reject },
278 { "redis_servers", opt_stringptr, &redis_servers },
280 { "remote_max_parallel", opt_int, &remote_max_parallel },
281 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
282 { "retry_data_expire", opt_time, &retry_data_expire },
283 { "retry_interval_max", opt_time, &retry_interval_max },
284 { "return_path_remove", opt_bool, &return_path_remove },
285 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
286 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
287 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
288 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
289 { "slow_lookup_log", opt_int, &slow_lookup_log },
290 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
291 { "smtp_accept_max", opt_int, &smtp_accept_max },
292 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
293 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
294 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
295 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
296 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
297 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
298 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
299 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
300 { "smtp_banner", opt_stringptr, &smtp_banner },
301 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
302 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
303 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
304 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
305 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
306 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
307 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
308 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
309 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
310 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
311 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
312 { "smtp_receive_timeout", opt_func, (void *) &fn_smtp_receive_timeout },
313 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
314 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
316 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
318 #ifdef WITH_CONTENT_SCAN
319 { "spamd_address", opt_stringptr, &spamd_address },
322 { "spf_guess", opt_stringptr, &spf_guess },
324 { "split_spool_directory", opt_bool, &split_spool_directory },
325 { "spool_directory", opt_stringptr, &spool_directory },
326 { "spool_wireformat", opt_bool, &spool_wireformat },
328 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
330 #ifdef EXPERIMENTAL_SRS
331 { "srs_config", opt_stringptr, &srs_config },
332 { "srs_hashlength", opt_int, &srs_hashlength },
333 { "srs_hashmin", opt_int, &srs_hashmin },
334 { "srs_maxage", opt_int, &srs_maxage },
335 { "srs_secrets", opt_stringptr, &srs_secrets },
336 { "srs_usehash", opt_bool, &srs_usehash },
337 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
339 { "strict_acl_vars", opt_bool, &strict_acl_vars },
340 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
341 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
342 { "syslog_duplication", opt_bool, &syslog_duplication },
343 { "syslog_facility", opt_stringptr, &syslog_facility_str },
344 { "syslog_pid", opt_bool, &syslog_pid },
345 { "syslog_processname", opt_stringptr, &syslog_processname },
346 { "syslog_timestamp", opt_bool, &syslog_timestamp },
347 { "system_filter", opt_stringptr, &system_filter },
348 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
349 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
350 { "system_filter_group", opt_gid, &system_filter_gid },
351 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
352 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
353 { "system_filter_user", opt_uid, &system_filter_uid },
354 { "tcp_nodelay", opt_bool, &tcp_nodelay },
355 #ifdef USE_TCP_WRAPPERS
356 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
358 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
359 { "timezone", opt_stringptr, &timezone_string },
360 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
362 { "tls_certificate", opt_stringptr, &tls_certificate },
363 { "tls_crl", opt_stringptr, &tls_crl },
364 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
365 { "tls_dhparam", opt_stringptr, &tls_dhparam },
366 { "tls_eccurve", opt_stringptr, &tls_eccurve },
367 # ifndef DISABLE_OCSP
368 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
370 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
371 { "tls_privatekey", opt_stringptr, &tls_privatekey },
372 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
373 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
374 # ifdef EXPERIMENTAL_TLS_RESUME
375 { "tls_resumption_hosts", opt_stringptr, &tls_resumption_hosts },
377 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
378 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
379 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
381 { "trusted_groups", opt_gidlist, &trusted_groups },
382 { "trusted_users", opt_uidlist, &trusted_users },
383 { "unknown_login", opt_stringptr, &unknown_login },
384 { "unknown_username", opt_stringptr, &unknown_username },
385 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
386 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
387 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
388 { "warn_message_file", opt_stringptr, &warn_message_file },
389 { "write_rejectlog", opt_bool, &write_rejectlog }
393 static int optionlist_config_size = nelem(optionlist_config);
400 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
405 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
413 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
415 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
417 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
418 builtin_macro_create(buf);
419 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
421 if (ai->macros_create) (ai->macros_create)();
426 options_logging(void)
430 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
432 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
433 builtin_macro_create(buf);
438 #else /*!MACRO_PREDEF*/
440 extern char **environ;
442 static void save_config_line(const uschar* line);
443 static void save_config_position(const uschar *file, int line);
444 static void print_config(BOOL admin, BOOL terse);
447 #define CSTATE_STACK_SIZE 10
449 const uschar *config_directory = NULL;
452 /* Structure for chain (stack) of .included files */
454 typedef struct config_file_item {
455 struct config_file_item *next;
456 const uschar *filename;
457 const uschar *directory;
462 /* Structure for chain of configuration lines (-bP config) */
464 typedef struct config_line_item {
465 struct config_line_item *next;
469 static config_line_item* config_lines;
471 /* Structure of table of conditional words and their state transitions */
473 typedef struct cond_item {
481 /* Structure of table of syslog facility names and values */
483 typedef struct syslog_fac_item {
489 static const char * const hidden = "<value not displayable>";
491 /* Static variables */
493 static config_file_item *config_file_stack = NULL; /* For includes */
495 static uschar *syslog_facility_str = NULL;
496 static uschar next_section[24];
497 static uschar time_buffer[24];
499 /* State variables for conditional loading (.ifdef / .else / .endif) */
501 static int cstate = 0;
502 static int cstate_stack_ptr = -1;
503 static int cstate_stack[CSTATE_STACK_SIZE];
505 /* Table of state transitions for handling conditional inclusions. There are
506 four possible state transitions:
510 .elifdef true (or .else)
513 .endif just causes the previous cstate to be popped off the stack */
515 static int next_cstate[3][4] =
517 /* State 0: reading from file, or reading until next .else or .endif */
519 /* State 1: condition failed, skipping until next .else or .endif */
521 /* State 2: skipping until .endif */
525 /* Table of conditionals and the states to set. For each name, there are four
526 values: the length of the name (to save computing it each time), the state to
527 set if a macro was found in the line, the state to set if a macro was not found
528 in the line, and a stack manipulation setting which is:
530 -1 pull state value off the stack
531 0 don't alter the stack
532 +1 push value onto stack, before setting new state
535 static cond_item cond_list[] = {
536 { US"ifdef", 5, 0, 1, 1 },
537 { US"ifndef", 6, 1, 0, 1 },
538 { US"elifdef", 7, 2, 3, 0 },
539 { US"elifndef", 8, 3, 2, 0 },
540 { US"else", 4, 2, 2, 0 },
541 { US"endif", 5, 0, 0, -1 }
544 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
546 /* Table of syslog facility names and their values */
548 static syslog_fac_item syslog_list[] = {
549 { US"mail", LOG_MAIL },
550 { US"user", LOG_USER },
551 { US"news", LOG_NEWS },
552 { US"uucp", LOG_UUCP },
553 { US"local0", LOG_LOCAL0 },
554 { US"local1", LOG_LOCAL1 },
555 { US"local2", LOG_LOCAL2 },
556 { US"local3", LOG_LOCAL3 },
557 { US"local4", LOG_LOCAL4 },
558 { US"local5", LOG_LOCAL5 },
559 { US"local6", LOG_LOCAL6 },
560 { US"local7", LOG_LOCAL7 },
561 { US"daemon", LOG_DAEMON }
564 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
567 #define opt_fn_print BIT(0)
568 #define opt_fn_print_label BIT(1)
571 /*************************************************
572 * Find the name of an option *
573 *************************************************/
575 /* This function is to aid debugging. Various functions take arguments that are
576 pointer variables in the options table or in option tables for various drivers.
577 For debugging output, it is useful to be able to find the name of the option
578 which is currently being processed. This function finds it, if it exists, by
579 searching the table(s).
581 Arguments: a value that is presumed to be in the table above
582 Returns: the option name, or an empty string
586 readconf_find_option(void *p)
588 for (int i = 0; i < nelem(optionlist_config); i++)
589 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
591 for (router_instance * r = routers; r; r = r->next)
593 router_info *ri = r->info;
594 for (int i = 0; i < *ri->options_count; i++)
596 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
597 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
598 return US ri->options[i].name;
602 for (transport_instance * t = transports; t; t = t->next)
604 transport_info *ti = t->info;
605 for (int i = 0; i < *ti->options_count; i++)
607 optionlist * op = &ti->options[i];
608 if ((op->type & opt_mask) != opt_stringptr) continue;
609 if (p == ( op->type & opt_public
611 : CS t->options_block
613 + (long int)op->value)
624 /*************************************************
625 * Deal with an assignment to a macro *
626 *************************************************/
628 /* We have a new definition; append to the list.
631 name Name of the macro; will be copied
632 val Expansion result for the macro; will be copied
636 macro_create(const uschar * name, const uschar * val, BOOL command_line)
638 macro_item * m = store_get(sizeof(macro_item), FALSE);
640 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
642 m->command_line = command_line;
643 m->namelen = Ustrlen(name);
644 m->replen = Ustrlen(val);
645 m->name = string_copy(name);
646 m->replacement = string_copy(val);
658 /* This function is called when a line that starts with an upper case letter is
659 encountered. The argument "line" should contain a complete logical line, and
660 start with the first letter of the macro name. The macro name and the
661 replacement text are extracted and stored. Redefinition of existing,
662 non-command line, macros is permitted using '==' instead of '='.
665 s points to the start of the logical line
667 Returns: FALSE iff fatal error
671 macro_read_assignment(uschar *s)
678 while (isalnum(*s) || *s == '_')
680 if (namelen >= sizeof(name) - 1)
682 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
683 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
686 name[namelen++] = *s++;
690 while (isspace(*s)) s++;
693 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
702 while (isspace(*s)) s++;
704 /* If an existing macro of the same name was defined on the command line, we
705 just skip this definition. It's an error to attempt to redefine a macro without
706 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
707 It is also an error to define a macro whose name begins with the name of a
708 previously defined macro. This is the requirement that make using a tree
709 for macros hard; we must check all macros for the substring. Perhaps a
710 sorted list, and a bsearch, would work?
711 Note: it is documented that the other way round works. */
713 for (m = macros; m; m = m->next)
715 if (Ustrcmp(m->name, name) == 0)
717 if (!m->command_line && !redef)
719 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
720 "defined (use \"==\" if you want to redefine it)", name);
726 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
728 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
729 "a macro because previously defined macro \"%s\" is a substring",
734 /* We cannot have this test, because it is documented that a substring
735 macro is permitted (there is even an example).
737 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
738 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
739 * "a macro because it is a substring of previously defined macro \"%s\"",
744 /* Check for an overriding command-line definition. */
746 if (m && m->command_line) return TRUE;
748 /* Redefinition must refer to an existing macro. */
753 m->replen = Ustrlen(s);
754 m->replacement = string_copy(s);
758 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
763 /* We have a new definition. */
765 (void) macro_create(name, s, FALSE);
773 /* Process line for macros. The line is in big_buffer starting at offset len.
774 Expand big_buffer if needed. Handle definitions of new macros, and
775 macro expansions, rewriting the line in the buffer.
778 len Offset in buffer of start of line
779 newlen Pointer to offset of end of line, updated on return
780 macro_found Pointer to return that a macro was expanded
782 Return: pointer to first nonblank char in line
786 macros_expand(int len, int * newlen, BOOL * macro_found)
788 uschar * ss = big_buffer + len;
791 /* Find the true start of the physical line - leading spaces are always
794 while (isspace(*ss)) ss++;
796 /* Process the physical line for macros. If this is the start of the logical
797 line, skip over initial text at the start of the line if it starts with an
798 upper case character followed by a sequence of name characters and an equals
799 sign, because that is the definition of a new macro, and we don't do
800 replacement therein. */
803 if (len == 0 && isupper(*s))
805 while (isalnum(*s) || *s == '_') s++;
806 while (isspace(*s)) s++;
807 if (*s != '=') s = ss; /* Not a macro definition */
810 /* Skip leading chars which cannot start a macro name, to avoid multiple
811 pointless rescans in Ustrstr calls. */
813 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
815 /* For each defined macro, scan the line (from after XXX= if present),
816 replacing all occurrences of the macro. */
818 *macro_found = FALSE;
819 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
824 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
828 while ((p = Ustrstr(t, m->name)) != NULL)
832 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
833 m->name, (int) Ustrlen(ss)-1, ss);
834 /* Expand the buffer if necessary */
836 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
838 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
839 uschar *newbuffer = store_malloc(newsize);
840 memcpy(newbuffer, big_buffer, *newlen + 1);
841 p = newbuffer + (p - big_buffer);
842 s = newbuffer + (s - big_buffer);
843 ss = newbuffer + (ss - big_buffer);
844 t = newbuffer + (t - big_buffer);
845 big_buffer_size = newsize;
846 store_free(big_buffer);
847 big_buffer = newbuffer;
850 /* Shuffle the remaining characters up or down in the buffer before
851 copying in the replacement text. Don't rescan the replacement for this
855 if ((moveby = m->replen - m->namelen) != 0)
857 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
860 Ustrncpy(p, m->replacement, m->replen);
862 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
867 /* An empty macro replacement at the start of a line could mean that ss no
868 longer points to the first non-blank character. */
870 while (isspace(*ss)) ss++;
874 /*************************************************
875 * Read configuration line *
876 *************************************************/
878 /* A logical line of text is read from the configuration file into the big
879 buffer, taking account of macros, .includes, and continuations. The size of
880 big_buffer is increased if necessary. The count of configuration lines is
881 maintained. Physical input lines starting with # (ignoring leading white space,
882 and after macro replacement) and empty logical lines are always ignored.
883 Leading and trailing spaces are removed.
885 If we hit a line of the form "begin xxxx", the xxxx is placed in the
886 next_section vector, and the function returns NULL, indicating the end of a
887 configuration section. On end-of-file, NULL is returned with next_section
892 Returns: a pointer to the first non-blank in the line,
893 or NULL if eof or end of section is reached
897 get_config_line(void)
899 int startoffset = 0; /* To first non-blank char in logical line */
900 int len = 0; /* Of logical line so far */
905 /* Loop for handling continuation lines, skipping comments, and dealing with
910 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
912 if (config_file_stack != NULL) /* EOF inside .include */
914 (void)fclose(config_file);
915 config_file = config_file_stack->file;
916 config_filename = config_file_stack->filename;
917 config_directory = config_file_stack->directory;
918 config_lineno = config_file_stack->lineno;
919 config_file_stack = config_file_stack->next;
921 save_config_position(config_filename, config_lineno);
925 /* EOF at top level */
927 if (cstate_stack_ptr >= 0)
928 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
929 "Unexpected end of configuration file: .endif missing");
931 if (len != 0) break; /* EOF after continuation */
932 next_section[0] = 0; /* EOF at start of logical line */
937 newlen = len + Ustrlen(big_buffer + len);
939 if (config_lines && config_lineno == 1)
940 save_config_position(config_filename, config_lineno);
942 /* Handle pathologically long physical lines - yes, it did happen - by
943 extending big_buffer at this point. The code also copes with very long
946 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
949 big_buffer_size += BIG_BUFFER_SIZE;
950 newbuffer = store_malloc(big_buffer_size);
952 /* This use of strcpy is OK because we know that the string in the old
953 buffer is shorter than the new buffer. */
955 Ustrcpy(newbuffer, big_buffer);
956 store_free(big_buffer);
957 big_buffer = newbuffer;
958 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
960 newlen += Ustrlen(big_buffer + newlen);
963 ss = macros_expand(len, &newlen, ¯o_found);
965 /* Check for comment lines - these are physical lines. */
967 if (*ss == '#') continue;
969 /* Handle conditionals, which are also applied to physical lines. Conditions
970 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
971 expansion occurred on the rest of the line. A preliminary test for the leading
972 '.' saves effort on most lines. */
978 /* Search the list of conditional directives */
980 for (i = 0; i < cond_list_size; i++)
983 cond_item *c = cond_list+i;
984 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
986 /* The following character must be white space or end of string */
988 n = ss[1 + c->namelen];
989 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
991 /* .ifdef and .ifndef push the current state onto the stack, then set
992 a new one from the table. Stack overflow is an error */
996 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
998 ".%s nested too deeply", c->name);
999 cstate_stack[++cstate_stack_ptr] = cstate;
1000 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1003 /* For any of the others, stack underflow is an error. The next state
1004 comes either from the stack (.endif) or from the table. */
1008 if (cstate_stack_ptr < 0)
1009 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1010 ".%s without matching .ifdef", c->name);
1011 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1012 next_cstate[cstate][macro_found? c->action1 : c->action2];
1015 /* Having dealt with a directive, break the loop */
1020 /* If we have handled a conditional directive, continue with the next
1021 physical line. Otherwise, fall through. */
1023 if (i < cond_list_size) continue;
1026 /* If the conditional state is not 0 (actively using these lines), ignore
1029 if (cstate != 0) continue; /* Conditional skip */
1031 /* Handle .include lines - these are also physical lines. */
1033 if (Ustrncmp(ss, ".include", 8) == 0 &&
1035 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1038 int include_if_exists = isspace(ss[8])? 0 : 10;
1039 config_file_item *save;
1040 struct stat statbuf;
1042 ss += 9 + include_if_exists;
1043 while (isspace(*ss)) ss++;
1044 t = ss + Ustrlen(ss);
1045 while (t > ss && isspace(t[-1])) t--;
1046 if (*ss == '\"' && t[-1] == '\"')
1053 /* We allow relative file names. For security reasons currently
1054 relative names not allowed with .include_if_exists. For .include_if_exists
1055 we need to check the permissions/ownership of the containing folder */
1057 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1058 "absolute path \"%s\"", ss);
1061 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1062 ss = string_from_gstring(g);
1065 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1068 save_config_position(config_filename, config_lineno);
1069 save = store_get(sizeof(config_file_item), FALSE);
1070 save->next = config_file_stack;
1071 config_file_stack = save;
1072 save->file = config_file;
1073 save->filename = config_filename;
1074 save->directory = config_directory;
1075 save->lineno = config_lineno;
1077 if (!(config_file = Ufopen(ss, "rb")))
1078 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1079 "configuration file %s", ss);
1081 config_filename = string_copy(ss);
1082 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1087 /* If this is the start of the logical line, remember where the non-blank
1088 data starts. Otherwise shuffle down continuation lines to remove leading
1092 startoffset = ss - big_buffer;
1095 s = big_buffer + len;
1098 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1103 /* Accept the new addition to the line. Remove trailing white space. */
1106 while (len > 0 && isspace(big_buffer[len-1])) len--;
1107 big_buffer[len] = 0;
1109 /* We are done if the line does not end in backslash and contains some data.
1110 Empty logical lines are ignored. For continuations, remove the backslash and
1111 go round the loop to read the continuation line. */
1115 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1116 big_buffer[--len] = 0; /* Remove backslash */
1118 } /* Loop for reading multiple physical lines */
1120 /* We now have a logical line. Test for the end of a configuration section (or,
1121 more accurately, for the start of the next section). Place the name of the next
1122 section in next_section, and return NULL. If the name given is longer than
1123 next_section, truncate it. It will be unrecognized later, because all the known
1124 section names do fit. Leave space for pluralizing. */
1126 s = big_buffer + startoffset; /* First non-space character */
1129 save_config_line(s);
1131 if (strncmpic(s, US"begin ", 6) == 0)
1134 while (isspace(*s)) s++;
1135 if (big_buffer + len - s > sizeof(next_section) - 2)
1136 s[sizeof(next_section) - 2] = 0;
1137 Ustrcpy(next_section, s);
1141 /* Return the first non-blank character. */
1148 /*************************************************
1150 *************************************************/
1152 /* The yield is the pointer to the next uschar. Names longer than the
1153 output space are silently truncated. This function is also used from acl.c when
1157 name where to put the name
1161 Returns: new input pointer
1165 readconf_readname(uschar *name, int len, uschar *s)
1168 while (isspace(*s)) s++;
1171 while (isalnum(*s) || *s == '_')
1173 if (p < len-1) name[p++] = *s;
1178 while (isspace(*s)) s++;
1185 /*************************************************
1186 * Read a time value *
1187 *************************************************/
1189 /* This function is also called from outside, to read argument
1190 time values. The format of a time value is:
1192 [<n>w][<n>d][<n>h][<n>m][<n>s]
1194 as long as at least one is present. If a format error is encountered,
1195 return a negative value. The value must be terminated by the given
1200 terminator required terminating character
1201 return_msec if TRUE, allow fractional seconds and return milliseconds
1203 Returns: the time value, or -1 on syntax error
1204 value is seconds if return_msec is FALSE
1205 value is milliseconds if return_msec is TRUE
1209 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1217 if (!isdigit(*s)) return -1;
1218 (void)sscanf(CCS s, "%d%n", &value, &count);
1223 case 'w': value *= 7;
1224 case 'd': value *= 24;
1225 case 'h': value *= 60;
1226 case 'm': value *= 60;
1231 if (!return_msec) return -1;
1232 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1234 if (*s++ != 's') return -1;
1235 yield += (int)(fraction * 1000.0);
1241 if (return_msec) value *= 1000;
1243 if (*s == terminator) return yield;
1245 /* Control never reaches here. */
1250 /*************************************************
1251 * Read a fixed point value *
1252 *************************************************/
1254 /* The value is returned *1000
1258 terminator required terminator
1260 Returns: the value, or -1 on error
1264 readconf_readfixed(const uschar *s, int terminator)
1268 if (!isdigit(*s)) return -1;
1269 (void)sscanf(CS s, "%d%n", &value, &count);
1271 yield = value * 1000;
1275 while (isdigit((*(++s))))
1277 yield += (*s - '0') * m;
1282 return (*s == terminator)? yield : (-1);
1287 /*************************************************
1288 * Find option in list *
1289 *************************************************/
1291 /* The lists are always in order, so binary chop can be used.
1294 name the option name to search for
1295 ol the first entry in the option list
1296 last one more than the offset of the last entry in the option list
1298 Returns: pointer to an option entry, or NULL if not found
1302 find_option(uschar *name, optionlist *ol, int last)
1305 while (last > first)
1307 int middle = (first + last)/2;
1308 int c = Ustrcmp(name, ol[middle].name);
1310 if (c == 0) return ol + middle;
1311 else if (c > 0) first = middle + 1;
1319 /*************************************************
1320 * Find a set flag in option list *
1321 *************************************************/
1323 /* Because some versions of Unix make no restrictions on the values of uids and
1324 gids (even negative ones), we cannot represent "unset" by a special value.
1325 There is therefore a separate boolean variable for each one indicating whether
1326 a value is set or not. This function returns a pointer to the boolean, given
1327 the original option name. It is a major disaster if the flag cannot be found.
1330 name the name of the uid or gid option
1331 oltop points to the start of the relevant option list
1332 last one more than the offset of the last item in the option list
1333 data_block NULL when reading main options => data values in the option
1334 list are absolute addresses; otherwise they are byte offsets
1335 in data_block (used for driver options)
1337 Returns: a pointer to the boolean flag.
1341 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1345 sprintf(CS name2, "*set_%.50s", name);
1346 ol = find_option(name2, oltop, last);
1347 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1348 "Exim internal error: missing set flag for %s", name);
1349 return (data_block == NULL)? (BOOL *)(ol->value) :
1350 (BOOL *)(US data_block + (long int)(ol->value));
1356 /*************************************************
1357 * Output extra characters message and die *
1358 *************************************************/
1360 /* Called when an option line has junk on the end. Sometimes this is because
1361 the sysadmin thinks comments are permitted.
1364 s points to the extra characters
1365 t1..t3 strings to insert in the log message
1367 Returns: doesn't return; dies
1371 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1373 uschar *comment = US"";
1374 if (*s == '#') comment = US" (# is comment only at line start)";
1375 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1376 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1381 /*************************************************
1382 * Read rewrite information *
1383 *************************************************/
1385 /* Each line of rewrite information contains:
1387 . A complete address in the form user@domain, possibly with
1388 leading * for each part; or alternatively, a regex.
1390 . A replacement string (which will be expanded).
1392 . An optional sequence of one-letter flags, indicating which
1393 headers etc. to apply this rule to.
1395 All this is decoded and placed into a control block. The OR of the flags is
1396 maintained in a common word.
1399 p points to the string that makes up the rule
1400 existflags points to the overall flag word
1401 isglobal TRUE if reading global rewrite rules
1403 Returns: the control block for the parsed rule.
1406 static rewrite_rule *
1407 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1409 rewrite_rule *next = store_get(sizeof(rewrite_rule), FALSE);
1412 next->key = string_dequote(&p);
1414 while (isspace(*p)) p++;
1416 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1417 "missing rewrite replacement string");
1420 next->replacement = string_dequote(&p);
1422 while (*p != 0) switch (*p++)
1424 case ' ': case '\t': break;
1426 case 'q': next->flags |= rewrite_quit; break;
1427 case 'w': next->flags |= rewrite_whole; break;
1429 case 'h': next->flags |= rewrite_all_headers; break;
1430 case 's': next->flags |= rewrite_sender; break;
1431 case 'f': next->flags |= rewrite_from; break;
1432 case 't': next->flags |= rewrite_to; break;
1433 case 'c': next->flags |= rewrite_cc; break;
1434 case 'b': next->flags |= rewrite_bcc; break;
1435 case 'r': next->flags |= rewrite_replyto; break;
1437 case 'E': next->flags |= rewrite_all_envelope; break;
1438 case 'F': next->flags |= rewrite_envfrom; break;
1439 case 'T': next->flags |= rewrite_envto; break;
1441 case 'Q': next->flags |= rewrite_qualify; break;
1442 case 'R': next->flags |= rewrite_repeat; break;
1445 next->flags |= rewrite_smtp;
1446 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1448 "rewrite rule has the S flag but is not a regular expression");
1452 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1453 "unknown rewrite flag character '%c' "
1454 "(could be missing quotes round replacement item)", p[-1]);
1458 /* If no action flags are set, set all the "normal" rewrites. */
1460 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1461 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1463 /* Remember which exist, for optimization, and return the rule */
1465 *existflags |= next->flags;
1472 /*************************************************
1473 * Read global rewrite information *
1474 *************************************************/
1476 /* Each line is a single rewrite rule; it is parsed into a control block
1477 by readconf_one_rewrite(), and its flags are ORed into the global flag
1478 word rewrite_existflags. */
1481 readconf_rewrites(void)
1483 rewrite_rule **chain = &global_rewrite_rules;
1486 while ((p = get_config_line()) != NULL)
1488 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1490 chain = &(next->next);
1496 /*************************************************
1498 *************************************************/
1500 /* Strings are read into the normal store pool. As long we aren't too
1501 near the end of the current block, the string will just use what is necessary
1502 on the top of the stacking pool, because string_cat() uses the extension
1506 s the rest of the input line
1507 name the option name (for errors)
1509 Returns: pointer to the string
1513 read_string(const uschar *s, const uschar *name)
1518 if (*s != '\"') return string_copy(s);
1521 yield = string_dequote(&s);
1523 if (s == ss+1 || s[-1] != '\"')
1524 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1525 "missing quote at end of string value for %s", name);
1527 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1533 /*************************************************
1534 * Custom-handler options *
1535 *************************************************/
1537 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1539 if (flags & opt_fn_print)
1541 if (flags & opt_fn_print_label) printf("%s = ", name);
1542 printf("%s\n", smtp_receive_timeout_s
1543 ? string_printing2(smtp_receive_timeout_s, FALSE)
1544 : readconf_printtime(smtp_receive_timeout));
1546 else if (*str == '$')
1547 smtp_receive_timeout_s = string_copy(str);
1550 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1551 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1552 if (smtp_receive_timeout < 0)
1553 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1558 /*************************************************
1559 * Handle option line *
1560 *************************************************/
1562 /* This function is called from several places to process a line containing the
1563 setting of an option. The first argument is the line to be decoded; it has been
1564 checked not to be empty and not to start with '#'. Trailing newlines and white
1565 space have been removed. The second argument is a pointer to the list of
1566 variable names that are to be recognized, together with their types and
1567 locations, and the third argument gives the number of entries in the list.
1569 The fourth argument is a pointer to a data block. If it is NULL, then the data
1570 values in the options list are absolute addresses. Otherwise, they are byte
1571 offsets in the data block.
1573 String option data may continue onto several lines; this function reads further
1574 data from config_file if necessary.
1576 The yield of this function is normally zero. If a string continues onto
1577 multiple lines, then the data value is permitted to be followed by a comma
1578 or a semicolon (for use in drivers) and the yield is that character.
1581 buffer contains the configuration line to be handled
1582 oltop points to the start of the relevant option list
1583 last one more than the offset of the last item in the option list
1584 data_block NULL when reading main options => data values in the option
1585 list are absolute addresses; otherwise they are byte offsets
1586 in data_block when they have opt_public set; otherwise
1587 they are byte offsets in data_block->options_block.
1588 unknown_txt format string to use in panic message for unknown option;
1589 must contain %s for option name
1590 if given as NULL, don't panic on unknown option
1592 Returns: TRUE if an option was read successfully,
1593 FALSE false for an unknown option if unknown_txt == NULL,
1594 otherwise panic and die on an unknown option
1598 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1599 void *data_block, uschar *unknown_txt)
1603 int count, type, value;
1607 BOOL boolvalue = TRUE;
1608 BOOL freesptr = TRUE;
1609 optionlist *ol, *ol2;
1613 uschar *inttype = US"";
1616 uschar **str_target;
1620 /* There may be leading spaces; thereafter, we expect an option name starting
1623 while (isspace(*s)) s++;
1625 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1627 /* Read the name of the option, and skip any subsequent white space. If
1628 it turns out that what we read was "hide", set the flag indicating that
1629 this is a secure option, and loop to read the next word. */
1631 for (int n = 0; n < 2; n++)
1633 while (isalnum(*s) || *s == '_')
1635 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1639 while (isspace(*s)) s++;
1640 if (Ustrcmp(name, "hide") != 0) break;
1641 issecure = opt_secure;
1645 /* Deal with "no_" or "not_" here for booleans */
1647 if (Ustrncmp(name, "no_", 3) == 0)
1653 if (Ustrncmp(name, "not_", 4) == 0)
1659 /* Search the list for the given name. A non-existent name, or an option that
1660 is set twice, is a disaster. */
1662 if (!(ol = find_option(name + offset, oltop, last)))
1664 if (unknown_txt == NULL) return FALSE;
1665 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1668 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1669 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1670 "\"%s\" option set for the second time", name);
1672 ol->type |= opt_set | issecure;
1673 type = ol->type & opt_mask;
1675 /* Types with data values must be followed by '='; the "no[t]_" prefix
1676 applies only to boolean values. */
1678 if (type < opt_bool || type > opt_bool_last)
1681 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1682 "negation prefix applied to a non-boolean option");
1684 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1685 "unexpected end of line (data missing) after %s", name);
1687 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1690 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1691 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1692 ultimately expands to one of those values. */
1694 else if (*s != 0 && (offset != 0 || *s != '='))
1695 extra_chars_error(s, US"boolean option ", name, US"");
1697 /* Skip white space after = */
1699 if (*s == '=') while (isspace((*(++s))));
1701 /* If there is a data block and the opt_public flag is not set, change
1702 the data block pointer to the private options block. */
1704 if (data_block != NULL && (ol->type & opt_public) == 0)
1705 data_block = (void *)(((driver_instance *)data_block)->options_block);
1707 /* Now get the data according to the type. */
1711 /* If a string value is not enclosed in quotes, it consists of
1712 the rest of the current line, verbatim. Otherwise, string escapes
1715 A transport is specified as a string, which is then looked up in the
1716 list of transports. A search type is specified as one of a number of
1719 A set or rewrite rules for a driver is specified as a string, which is
1720 then parsed into a suitable chain of control blocks.
1722 Uids and gids are specified as strings which are then looked up in the
1723 passwd file. Lists of uids and gids are similarly specified as colon-
1724 separated strings. */
1729 case opt_expand_uid:
1730 case opt_expand_gid:
1735 reset_point = store_mark();
1736 sptr = read_string(s, name);
1738 /* Having read a string, we now have several different ways of using it,
1739 depending on the data type, so do another switch. If keeping the actual
1740 string is not required (because it is interpreted), freesptr is set TRUE,
1741 and at the end we reset the pool. */
1745 /* If this was a string, set the variable to point to the new string,
1746 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1747 rules, we still keep the string (for printing), and parse the rules into a
1748 control block and flags word. */
1751 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1753 if (ol->type & opt_rep_con)
1755 uschar * saved_condition;
1756 /* We already have a condition, we're conducting a crude hack to let
1757 multiple condition rules be chained together, despite storing them in
1759 *str_target = string_copy_perm( (saved_condition = *str_target)
1760 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1761 saved_condition, sptr)
1764 /* TODO(pdp): there is a memory leak here and just below
1765 when we set 3 or more conditions; I still don't
1766 understand the store mechanism enough to know
1767 what's the safe way to free content from an earlier store.
1768 AFAICT, stores stack, so freeing an early stored item also stores
1769 all data alloc'd after it. If we knew conditions were adjacent,
1770 we could survive that, but we don't. So I *think* we need to take
1771 another bit from opt_type to indicate "malloced"; this seems like
1772 quite a hack, especially for this one case. It also means that
1773 we can't ever reclaim the store from the *first* condition.
1775 Because we only do this once, near process start-up, I'm prepared to
1776 let this slide for the time being, even though it rankles. */
1778 else if (ol->type & opt_rep_str)
1781 Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
1782 : Ustrncmp(name, "set", 3) == 0 ? ';'
1784 int sep_i = -(int)sep_o;
1785 const uschar * list = sptr;
1787 gstring * list_o = NULL;
1791 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1792 list_o = string_cat(list_o, *str_target);
1795 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1796 list_o = string_append_listele(list_o, sep_o, s);
1799 *str_target = string_copy_perm(string_from_gstring(list_o), FALSE);
1810 *USS (US data_block + (long int)(ol->value)) = sptr;
1812 *USS (ol->value) = sptr;
1814 if (type == opt_rewrite)
1819 rewrite_rule **chain;
1822 sprintf(CS name2, "*%.50s_rules", name);
1823 ol2 = find_option(name2, oltop, last);
1824 sprintf(CS name2, "*%.50s_flags", name);
1825 ol3 = find_option(name2, oltop, last);
1827 if (ol2 == NULL || ol3 == NULL)
1828 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1829 "rewrite rules not available for driver");
1831 if (data_block == NULL)
1833 chain = (rewrite_rule **)(ol2->value);
1834 flagptr = (int *)(ol3->value);
1838 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1839 flagptr = (int *)(US data_block + (long int)(ol3->value));
1842 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1844 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1846 chain = &(next->next);
1849 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1850 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1851 "non-header rewrite - not allowed at transport time -");
1855 /* If it was an expanded uid, see if there is any expansion to be
1856 done by checking for the presence of a $ character. If there is, save it
1857 in the corresponding *expand_user option field. Otherwise, fall through
1858 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1861 case opt_expand_uid:
1862 sprintf(CS name2, "*expand_%.50s", name);
1863 ol2 = find_option(name2, oltop, last);
1866 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1868 if (data_block == NULL)
1869 *((uschar **)(ol2->value)) = ss;
1871 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1875 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1881 /* Look up a fixed uid, and also make use of the corresponding gid
1882 if a passwd entry is returned and the gid has not been set. */
1885 if (!route_finduser(sptr, &pw, &uid))
1886 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1887 if (data_block == NULL)
1888 *((uid_t *)(ol->value)) = uid;
1890 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1892 /* Set the flag indicating a fixed value is set */
1894 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1896 /* Handle matching gid if we have a passwd entry: done by finding the
1897 same name with terminating "user" changed to "group"; if not found,
1898 ignore. Also ignore if the value is already set. */
1900 if (pw == NULL) break;
1901 Ustrcpy(name+Ustrlen(name)-4, US"group");
1902 ol2 = find_option(name, oltop, last);
1903 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1904 (ol2->type & opt_mask) == opt_expand_gid))
1906 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1909 if (data_block == NULL)
1910 *((gid_t *)(ol2->value)) = pw->pw_gid;
1912 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1918 /* If it was an expanded gid, see if there is any expansion to be
1919 done by checking for the presence of a $ character. If there is, save it
1920 in the corresponding *expand_user option field. Otherwise, fall through
1921 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1924 case opt_expand_gid:
1925 sprintf(CS name2, "*expand_%.50s", name);
1926 ol2 = find_option(name2, oltop, last);
1929 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1931 if (data_block == NULL)
1932 *((uschar **)(ol2->value)) = ss;
1934 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1938 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1944 /* Handle freestanding gid */
1947 if (!route_findgroup(sptr, &gid))
1948 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1949 if (data_block == NULL)
1950 *((gid_t *)(ol->value)) = gid;
1952 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1953 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1956 /* If it was a uid list, look up each individual entry, and build
1957 a vector of uids, with a count in the first element. Put the vector
1958 in malloc store so we can free the string. (We are reading into
1959 permanent store already.) */
1967 const uschar *op = expand_string (sptr);
1970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1971 name, expand_string_message);
1974 if (*p != 0) count++;
1975 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1976 list = store_malloc(count*sizeof(uid_t));
1977 list[ptr++] = (uid_t)(count - 1);
1979 if (data_block == NULL)
1980 *((uid_t **)(ol->value)) = list;
1982 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1988 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1989 if (!route_finduser(big_buffer, NULL, &uid))
1990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1997 /* If it was a gid list, look up each individual entry, and build
1998 a vector of gids, with a count in the first element. Put the vector
1999 in malloc store so we can free the string. (We are reading into permanent
2008 const uschar *op = expand_string (sptr);
2011 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2012 name, expand_string_message);
2015 if (*p != 0) count++;
2016 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2017 list = store_malloc(count*sizeof(gid_t));
2018 list[ptr++] = (gid_t)(count - 1);
2020 if (data_block == NULL)
2021 *((gid_t **)(ol->value)) = list;
2023 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2029 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2030 if (!route_findgroup(big_buffer, &gid))
2031 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2039 /* Release store if the value of the string doesn't need to be kept. */
2041 if (freesptr) reset_point = store_reset(reset_point);
2044 /* Expanded boolean: if no characters follow, or if there are no dollar
2045 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2046 save the string for later expansion in the alternate place. */
2048 case opt_expand_bool:
2049 if (*s != 0 && Ustrchr(s, '$') != 0)
2051 sprintf(CS name2, "*expand_%.50s", name);
2052 if ((ol2 = find_option(name2, oltop, last)))
2054 reset_point = store_mark();
2055 sptr = read_string(s, name);
2056 if (data_block == NULL)
2057 *((uschar **)(ol2->value)) = sptr;
2059 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2066 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2067 look for yes/not/true/false. Some booleans are stored in a single bit in
2068 a single int. There's a special fudge for verify settings; without a suffix
2069 they set both xx_sender and xx_recipient. The table points to the sender
2070 value; search subsequently for the recipient. There's another special case:
2071 opt_bool_set also notes when a boolean has been set. */
2075 case opt_bool_verify:
2079 s = readconf_readname(name2, 64, s);
2080 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2082 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2084 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2085 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2086 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2087 US"for boolean option ", name);
2090 /* Handle single-bit type. */
2092 if (type == opt_bit)
2094 int bit = 1 << ((ol->type >> 16) & 31);
2095 int *ptr = (data_block == NULL)?
2096 (int *)(ol->value) :
2097 (int *)(US data_block + (long int)ol->value);
2098 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2102 /* Handle full BOOL types */
2104 if (data_block == NULL)
2105 *((BOOL *)(ol->value)) = boolvalue;
2107 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2111 if (type == opt_bool_verify)
2113 sprintf(CS name2, "%.50s_recipient", name + offset);
2114 ol2 = find_option(name2, oltop, last);
2117 if (data_block == NULL)
2118 *((BOOL *)(ol2->value)) = boolvalue;
2120 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2124 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2126 else if (type == opt_bool_set)
2128 sprintf(CS name2, "*set_%.50s", name + offset);
2129 ol2 = find_option(name2, oltop, last);
2132 if (data_block == NULL)
2133 *((BOOL *)(ol2->value)) = TRUE;
2135 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2144 inttype = US"octal ";
2146 /* Integer: a simple(ish) case; allow octal and hex formats, and
2147 suffixes K, M, G, and T. The different types affect output, not input. */
2156 lvalue = strtol(CS s, CSS &endptr, intbase);
2159 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2162 if (errno != ERANGE && *endptr)
2164 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2166 if ((mp = Ustrchr(mp, *endptr)))
2171 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2182 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2183 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2184 "absolute value of integer \"%s\" is too large (overflow)", s);
2186 while (isspace(*endptr)) endptr++;
2188 extra_chars_error(endptr, inttype, US"integer value for ", name);
2190 value = (int)lvalue;
2194 *(int *)(US data_block + (long int)ol->value) = value;
2196 *(int *)ol->value = value;
2199 /* Integer held in K: again, allow formats and suffixes as above. */
2205 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2208 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2211 if (errno != ERANGE && *endptr)
2213 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2215 if ((mp = Ustrchr(mp, *endptr)))
2220 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2229 lvalue = (lvalue + 512)/1024;
2232 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2233 "absolute value of integer \"%s\" is too large (overflow)", s);
2235 while (isspace(*endptr)) endptr++;
2237 extra_chars_error(endptr, inttype, US"integer value for ", name);
2240 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2242 *(int_eximarith_t *)ol->value = lvalue;
2246 /* Fixed-point number: held to 3 decimal places. */
2249 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2250 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2251 "fixed-point number expected for %s", name);
2253 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2254 "integer \"%s\" is too large (overflow)", s);
2258 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2259 "integer \"%s\" is too large (overflow)", s);
2261 /* We get a coverity error here for using count, as it derived
2262 from the tainted buffer pointed to by s, as parsed by sscanf().
2263 By the definition of sscanf we must be accessing between start
2264 and end of s (assuming it is nul-terminated...) so ignore the error. */
2265 /* coverity[tainted_data] */
2266 if (s[count] == '.')
2269 while (isdigit(s[++count]))
2271 value += (s[count] - '0') * d;
2276 while (isspace(s[count])) count++;
2279 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2281 if (data_block == NULL)
2282 *((int *)(ol->value)) = value;
2284 *((int *)(US data_block + (long int)(ol->value))) = value;
2287 /* There's a special routine to read time values. */
2290 value = readconf_readtime(s, 0, FALSE);
2292 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2294 if (data_block == NULL)
2295 *((int *)(ol->value)) = value;
2297 *((int *)(US data_block + (long int)(ol->value))) = value;
2300 /* A time list is a list of colon-separated times, with the first
2301 element holding the size of the list and the second the number of
2307 int *list = (data_block == NULL)?
2308 (int *)(ol->value) :
2309 (int *)(US data_block + (long int)(ol->value));
2311 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2314 uschar *snext = Ustrchr(s, ':');
2318 while (ss > s && isspace(ss[-1])) ss--;
2321 value = readconf_readtime(s, terminator, FALSE);
2323 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2325 if (count > 1 && value <= list[count])
2326 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2327 "time value out of order for %s", name);
2328 list[count+1] = value;
2329 if (snext == NULL) break;
2331 while (isspace(*s)) s++;
2334 if (count > list[0] - 2)
2335 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2337 if (count > 0 && list[2] == 0) count = 0;
2344 void (*fn)() = ol->value;
2355 /*************************************************
2356 * Print a time value *
2357 *************************************************/
2360 Argument: a time value in seconds
2361 Returns: pointer to a fixed buffer containing the time as a string,
2362 in readconf_readtime() format
2366 readconf_printtime(int t)
2369 uschar *p = time_buffer;
2386 if (w > 0) p += sprintf(CS p, "%dw", w);
2387 if (d > 0) p += sprintf(CS p, "%dd", d);
2388 if (h > 0) p += sprintf(CS p, "%dh", h);
2389 if (m > 0) p += sprintf(CS p, "%dm", m);
2390 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2397 /*************************************************
2398 * Print an individual option value *
2399 *************************************************/
2401 /* This is used by the -bP option, so prints to the standard output.
2402 The entire options list is passed in as an argument, because some options come
2403 in pairs - typically uid/gid settings, which can either be explicit numerical
2404 values, or strings to be expanded later. If the numerical value is unset,
2405 search for "*expand_<name>" to see if there is a string equivalent.
2408 ol option entry, or NULL for an unknown option
2410 options_block NULL for main configuration options; otherwise points to
2411 a driver block; if the option doesn't have opt_public
2412 set, then options_block->options_block is where the item
2414 oltop points to the option list in which ol exists
2415 last one more than the offset of the last entry in optop
2416 no_labels do not show "foo = " at the start.
2418 Returns: boolean success
2422 print_ol(optionlist *ol, uschar *name, void *options_block,
2423 optionlist *oltop, int last, BOOL no_labels)
2436 printf("%s is not a known option\n", name);
2440 /* Non-admin callers cannot see options that have been flagged secure by the
2443 if (!f.admin_user && ol->type & opt_secure)
2446 printf("%s\n", hidden);
2448 printf("%s = %s\n", name, hidden);
2452 /* Else show the value of the option */
2457 if (!(ol->type & opt_public))
2458 options_block = (void *)(((driver_instance *)options_block)->options_block);
2459 value = (void *)(US options_block + (long int)value);
2462 switch(ol->type & opt_mask)
2465 case opt_rewrite: /* Show the text value */
2467 if (!no_labels) printf("%s = ", name);
2468 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2472 if (!no_labels) printf("%s = ", name);
2473 printf("%d\n", *((int *)value));
2478 int x = *((int *)value);
2479 if (x != 0 && (x & 1023) == 0)
2483 if ((x & 1023) == 0)
2488 if (!no_labels) printf("%s = ", name);
2489 printf("%d%c\n", x, c);
2493 if (!no_labels) printf("%s = ", name);
2501 int_eximarith_t x = *((int_eximarith_t *)value);
2502 if (!no_labels) printf("%s = ", name);
2503 if (x == 0) printf("0\n");
2504 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2505 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2506 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2507 else printf(PR_EXIM_ARITH "K\n", x);
2512 if (!no_labels) printf("%s = ", name);
2513 printf("%#o\n", *((int *)value));
2516 /* Can be negative only when "unset", in which case integer */
2520 int x = *((int *)value);
2523 if (x < 0) printf("%s =\n", name); else
2525 if (!no_labels) printf("%s = ", name);
2526 printf("%d.", x/1000);
2539 /* If the numerical value is unset, try for the string value */
2541 case opt_expand_uid:
2542 if (! *get_set_flag(name, oltop, last, options_block))
2544 sprintf(CS name2, "*expand_%.50s", name);
2545 if ((ol2 = find_option(name2, oltop, last)))
2547 void *value2 = ol2->value;
2549 value2 = (void *)(US options_block + (long int)value2);
2551 if (!no_labels) printf("%s = ", name);
2552 printf("%s\n", s ? string_printing(s) : US"");
2557 /* Else fall through */
2560 if (!no_labels) printf("%s = ", name);
2561 if (! *get_set_flag(name, oltop, last, options_block))
2564 if ((pw = getpwuid(*((uid_t *)value))))
2565 printf("%s\n", pw->pw_name);
2567 printf("%ld\n", (long int)(*((uid_t *)value)));
2570 /* If the numerical value is unset, try for the string value */
2572 case opt_expand_gid:
2573 if (! *get_set_flag(name, oltop, last, options_block))
2575 sprintf(CS name2, "*expand_%.50s", name);
2576 if ( (ol2 = find_option(name2, oltop, last))
2577 && (ol2->type & opt_mask) == opt_stringptr)
2579 void *value2 = ol2->value;
2581 value2 = (void *)(US options_block + (long int)value2);
2583 if (!no_labels) printf("%s = ", name);
2584 printf("%s\n", s ? string_printing(s) : US"");
2589 /* Else fall through */
2592 if (!no_labels) printf("%s = ", name);
2593 if (! *get_set_flag(name, oltop, last, options_block))
2596 if ((gr = getgrgid(*((int *)value))))
2597 printf("%s\n", gr->gr_name);
2599 printf("%ld\n", (long int)(*((int *)value)));
2603 uidlist = *((uid_t **)value);
2604 if (!no_labels) printf("%s =", name);
2607 uschar sep = no_labels ? '\0' : ' ';
2608 for (int i = 1; i <= (int)(uidlist[0]); i++)
2610 uschar *name = NULL;
2611 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2612 if (sep != '\0') printf("%c", sep);
2613 if (name) printf("%s", name);
2614 else printf("%ld", (long int)(uidlist[i]));
2622 gidlist = *((gid_t **)value);
2623 if (!no_labels) printf("%s =", name);
2626 uschar sep = no_labels ? '\0' : ' ';
2627 for (int i = 1; i <= (int)(gidlist[0]); i++)
2629 uschar *name = NULL;
2630 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2631 if (sep != '\0') printf("%c", sep);
2632 if (name) printf("%s", name);
2633 else printf("%ld", (long int)(gidlist[i]));
2641 if (!no_labels) printf("%s = ", name);
2642 printf("%s\n", readconf_printtime(*((int *)value)));
2647 int *list = (int *)value;
2648 if (!no_labels) printf("%s = ", name);
2649 for (int i = 0; i < list[1]; i++)
2650 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2656 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2660 case opt_expand_bool:
2661 sprintf(CS name2, "*expand_%.50s", name);
2662 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2664 void *value2 = ol2->value;
2666 value2 = (void *)(US options_block + (long int)value2);
2670 if (!no_labels) printf("%s = ", name);
2671 printf("%s\n", string_printing(s));
2674 /* s == NULL => string not set; fall through */
2680 case opt_bool_verify:
2682 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2687 void (*fn)() = ol->value;
2688 fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2697 /*************************************************
2698 * Print value from main configuration *
2699 *************************************************/
2701 /* This function, called as a result of encountering the -bP option,
2702 causes the value of any main configuration variable to be output if the
2703 second argument is NULL. There are some special values:
2705 all print all main configuration options
2706 config_file print the name of the configuration file
2707 (configure_file will still work, for backward
2709 routers print the routers' configurations
2710 transports print the transports' configuration
2711 authenticators print the authenticators' configuration
2712 macros print the macros' configuration
2713 router_list print a list of router names
2714 transport_list print a list of transport names
2715 authenticator_list print a list of authentication mechanism names
2716 macro_list print a list of macro names
2717 +name print a named list item
2718 local_scan print the local_scan options
2719 config print the configuration as it is parsed
2720 environment print the used execution environment
2722 If the second argument is not NULL, it must be one of "router", "transport",
2723 "authenticator" or "macro" in which case the first argument identifies the
2724 driver whose options are to be printed.
2727 name option name if type == NULL; else driver name
2728 type NULL or driver type name, as described above
2729 no_labels avoid the "foo = " at the start of an item
2731 Returns: Boolean success
2735 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2737 BOOL names_only = FALSE;
2738 optionlist *ol2 = NULL;
2739 driver_instance *d = NULL;
2748 static uschar *types[] = { US"address", US"domain", US"host",
2750 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2751 &hostlist_anchor, &localpartlist_anchor };
2753 for (int i = 0; i < 4; i++)
2754 if ((t = tree_search(*(anchors[i]), name+1)))
2758 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2760 printf("%slist %s = %s\n", types[i], name+1,
2761 ((namedlist_block *)(t->data.ptr))->string);
2765 printf("no address, domain, host, or local part list called \"%s\" "
2766 "exists\n", name+1);
2771 if ( Ustrcmp(name, "configure_file") == 0
2772 || Ustrcmp(name, "config_file") == 0)
2774 printf("%s\n", CS config_main_filename);
2778 if (Ustrcmp(name, "all") == 0)
2780 for (optionlist * ol = optionlist_config;
2781 ol < optionlist_config + nelem(optionlist_config); ol++)
2782 if (!(ol->type & opt_hidden))
2783 (void) print_ol(ol, US ol->name, NULL,
2784 optionlist_config, nelem(optionlist_config),
2789 if (Ustrcmp(name, "local_scan") == 0)
2791 #ifndef LOCAL_SCAN_HAS_OPTIONS
2792 printf("local_scan() options are not supported\n");
2795 for (optionlist * ol = local_scan_options;
2796 ol < local_scan_options + local_scan_options_count; ol++)
2797 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2798 local_scan_options_count, no_labels);
2803 if (Ustrcmp(name, "config") == 0)
2805 print_config(f.admin_user, no_labels);
2809 if (Ustrcmp(name, "routers") == 0)
2814 else if (Ustrcmp(name, "transports") == 0)
2816 type = US"transport";
2819 else if (Ustrcmp(name, "authenticators") == 0)
2821 type = US"authenticator";
2824 else if (Ustrcmp(name, "macros") == 0)
2829 else if (Ustrcmp(name, "router_list") == 0)
2835 else if (Ustrcmp(name, "transport_list") == 0)
2837 type = US"transport";
2841 else if (Ustrcmp(name, "authenticator_list") == 0)
2843 type = US"authenticator";
2847 else if (Ustrcmp(name, "macro_list") == 0)
2853 else if (Ustrcmp(name, "environment") == 0)
2858 for (p = USS environ; *p; p++) ;
2859 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2861 for (p = USS environ; *p; p++)
2864 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2872 return print_ol(find_option(name,
2873 optionlist_config, nelem(optionlist_config)),
2874 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2877 /* Handle the options for a router or transport. Skip options that are flagged
2878 as hidden. Some of these are options with names starting with '*', used for
2879 internal alternative representations of other options (which the printing
2880 function will sort out). Others are synonyms kept for backward compatibility.
2883 if (Ustrcmp(type, "router") == 0)
2885 d = (driver_instance *)routers;
2886 ol2 = optionlist_routers;
2887 size = optionlist_routers_size;
2889 else if (Ustrcmp(type, "transport") == 0)
2891 d = (driver_instance *)transports;
2892 ol2 = optionlist_transports;
2893 size = optionlist_transports_size;
2895 else if (Ustrcmp(type, "authenticator") == 0)
2897 d = (driver_instance *)auths;
2898 ol2 = optionlist_auths;
2899 size = optionlist_auths_size;
2902 else if (Ustrcmp(type, "macro") == 0)
2904 /* People store passwords in macros and they were previously not available
2905 for printing. So we have an admin_users restriction. */
2908 fprintf(stderr, "exim: permission denied\n");
2911 for (macro_item * m = macros; m; m = m->next)
2912 if (!name || Ustrcmp(name, m->name) == 0)
2915 printf("%s\n", CS m->name);
2917 printf("%s\n", CS m->replacement);
2919 printf("%s=%s\n", CS m->name, CS m->replacement);
2923 if (!name) return TRUE;
2925 printf("%s %s not found\n", type, name);
2931 for (; d; d = d->next) printf("%s\n", CS d->name);
2935 /* Either search for a given driver, or print all of them */
2937 for (; d; d = d->next)
2941 printf("\n%s %s:\n", d->name, type);
2942 else if (Ustrcmp(d->name, name) != 0) continue;
2944 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2945 if (!(ol->type & opt_hidden))
2946 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2948 for (optionlist * ol = d->info->options;
2949 ol < d->info->options + *(d->info->options_count); ol++)
2950 if (!(ol->type & opt_hidden))
2951 rc |= print_ol(ol, US ol->name, d, d->info->options,
2952 *d->info->options_count, no_labels);
2954 if (name) return rc;
2956 if (!name) return TRUE;
2958 printf("%s %s not found\n", type, name);
2964 /*************************************************
2965 * Read a named list item *
2966 *************************************************/
2968 /* This function reads a name and a list (i.e. string). The name is used to
2969 save the list in a tree, sorted by its name. Each entry also has a number,
2970 which can be used for caching tests, but if the string contains any expansion
2971 items other than $key, the number is set negative to inhibit caching. This
2972 mechanism is used for domain, host, and address lists that are referenced by
2976 anchorp points to the tree anchor
2977 numberp points to the current number for this tree
2978 max the maximum number permitted
2979 s the text of the option line, starting immediately after the name
2981 tname the name of the list type, for messages
2987 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2990 BOOL forcecache = FALSE;
2993 namedlist_block *nb = store_get(sizeof(namedlist_block), FALSE);
2995 if (Ustrncmp(s, "_cache", 6) == 0)
3002 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3004 if (*numberp >= max)
3005 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3008 while (isspace(*s)) s++;
3010 while (isalnum(*s) || *s == '_') s++;
3011 t = store_get(sizeof(tree_node) + s-ss, is_tainted(ss));
3012 Ustrncpy(t->name, ss, s-ss);
3014 while (isspace(*s)) s++;
3016 if (!tree_insertnode(anchorp, t))
3017 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3018 "duplicate name \"%s\" for a named %s", t->name, tname);
3021 nb->number = *numberp;
3024 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3025 "missing '=' after \"%s\"", t->name);
3026 while (isspace(*s)) s++;
3027 nb->string = read_string(s, t->name);
3028 nb->cache_data = NULL;
3030 /* Check the string for any expansions; if any are found, mark this list
3031 uncacheable unless the user has explicited forced caching. */
3033 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3039 /*************************************************
3040 * Unpick data for a rate limit *
3041 *************************************************/
3043 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3047 s string, in the form t,b,f,l
3048 where t is the threshold (integer)
3049 b is the initial delay (time)
3050 f is the multiplicative factor (fixed point)
3051 k is the maximum time (time)
3052 threshold where to store threshold
3053 base where to store base in milliseconds
3054 factor where to store factor in milliseconds
3055 limit where to store limit
3057 Returns: nothing (panics on error)
3061 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3064 uschar bstring[16], lstring[16];
3066 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3067 factor, lstring) == 4)
3069 *base = readconf_readtime(bstring, 0, TRUE);
3070 *limit = readconf_readtime(lstring, 0, TRUE);
3071 if (*base >= 0 && *limit >= 0) return;
3073 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3079 /*************************************************
3080 * Read main configuration options *
3081 *************************************************/
3083 /* This function is the first to be called for configuration reading. It
3084 opens the configuration file and reads general configuration settings until
3085 it reaches the end of the configuration section. The file is then left open so
3086 that the remaining configuration data can subsequently be read if needed for
3089 The configuration file must be owned either by root or exim, and be writeable
3090 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3091 in the config file, so the test is done on the compiled in values. A slight
3092 anomaly, to be carefully documented.
3094 The name of the configuration file is taken from a list that is included in the
3095 binary of Exim. It can be altered from the command line, but if that is done,
3096 root privilege is immediately withdrawn unless the caller is root or exim.
3097 The first file on the list that exists is used.
3099 For use on multiple systems that share file systems, first look for a
3100 configuration file whose name has the current node name on the end. If that is
3101 not found, try the generic name. For really contorted configurations, that run
3102 multiple Exims with different uid settings, first try adding the effective uid
3103 before the node name. These complications are going to waste resources on most
3104 systems. Therefore they are available only when requested by compile-time
3108 readconf_main(BOOL nowarn)
3111 struct stat statbuf;
3112 uschar *s, *filename;
3113 const uschar *list = config_main_filelist;
3115 /* Loop through the possible file names */
3117 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3120 /* Cut out all the fancy processing unless specifically wanted */
3122 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3123 uschar *suffix = filename + Ustrlen(filename);
3125 /* Try for the node-specific file if a node name exists */
3127 #ifdef CONFIGURE_FILE_USE_NODE
3129 if (uname(&uts) >= 0)
3131 #ifdef CONFIGURE_FILE_USE_EUID
3132 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3133 config_file = Ufopen(filename, "rb");
3134 if (config_file == NULL)
3135 #endif /* CONFIGURE_FILE_USE_EUID */
3137 sprintf(CS suffix, ".%.256s", uts.nodename);
3138 config_file = Ufopen(filename, "rb");
3141 #endif /* CONFIGURE_FILE_USE_NODE */
3143 /* Otherwise, try the generic name, possibly with the euid added */
3145 #ifdef CONFIGURE_FILE_USE_EUID
3146 if (config_file == NULL)
3148 sprintf(CS suffix, ".%ld", (long int)original_euid);
3149 config_file = Ufopen(filename, "rb");
3151 #endif /* CONFIGURE_FILE_USE_EUID */
3153 /* Finally, try the unadorned name */
3155 if (config_file == NULL)
3158 config_file = Ufopen(filename, "rb");
3160 #else /* if neither defined */
3162 /* This is the common case when the fancy processing is not included. */
3164 config_file = Ufopen(filename, "rb");
3167 /* If the file does not exist, continue to try any others. For any other
3168 error, break out (and die). */
3170 if (config_file != NULL || errno != ENOENT) break;
3173 /* On success, save the name for verification; config_filename is used when
3174 logging configuration errors (it changes for .included files) whereas
3175 config_main_filename is the name shown by -bP. Failure to open a configuration
3176 file is a serious disaster. */
3180 uschar *last_slash = Ustrrchr(filename, '/');
3181 config_filename = config_main_filename = string_copy(filename);
3183 /* The config_main_directory we need for the $config_dir expansion.
3184 config_main_filename we need for $config_file expansion.
3185 And config_dir is the directory of the current configuration, used for
3186 relative .includes. We do need to know it's name, as we change our working
3189 if (filename[0] == '/')
3190 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3193 /* relative configuration file name: working dir + / + basename(filename) */
3195 uschar buf[PATH_MAX];
3198 if (os_getcwd(buf, PATH_MAX) == NULL)
3200 perror("exim: getcwd");
3203 g = string_cat(NULL, buf);
3205 /* If the dir does not end with a "/", append one */
3206 if (g->s[g->ptr-1] != '/')
3207 g = string_catn(g, US"/", 1);
3209 /* If the config file contains a "/", extract the directory part */
3211 g = string_catn(g, filename, last_slash - filename);
3213 config_main_directory = string_from_gstring(g);
3215 config_directory = config_main_directory;
3219 if (filename == NULL)
3220 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3221 "%s", config_main_filelist);
3223 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3224 "configuration file %s", filename));
3227 /* Now, once we found and opened our configuration file, we change the directory
3228 to a safe place. Later we change to $spool_directory. */
3230 if (Uchdir("/") < 0)
3232 perror("exim: chdir `/': ");
3236 /* Check the status of the file we have opened, if we have retained root
3237 privileges and the file isn't /dev/null (which *should* be 0666). */
3239 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3241 if (fstat(fileno(config_file), &statbuf) != 0)
3242 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3245 if ((statbuf.st_uid != root_uid /* owner not root */
3246 #ifdef CONFIGURE_OWNER
3247 && statbuf.st_uid != config_uid /* owner not the special one */
3250 (statbuf.st_gid != root_gid /* group not root & */
3251 #ifdef CONFIGURE_GROUP
3252 && statbuf.st_gid != config_gid /* group not the special one */
3254 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3256 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3258 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3259 "wrong owner, group, or mode", big_buffer);
3261 /* Do a dummy store-allocation of a size related to the (toplevel) file size.
3262 This assumes we will need this much storage to handle all the allocations
3263 during startup; it won't help when .include is being used. When it does, it
3264 will cut down on the number of store blocks (and malloc calls, and sbrk
3265 syscalls). It also assume we're on the relevant pool. */
3267 if (statbuf.st_size > 8192)
3269 rmark r = store_mark();
3270 void * dummy = store_get((int)statbuf.st_size, FALSE);
3275 /* Process the main configuration settings. They all begin with a lower case
3276 letter. If we see something starting with an upper case letter, it is taken as
3277 a macro definition. */
3279 while ((s = get_config_line()))
3281 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3282 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3283 "found unexpected BOM (Byte Order Mark)");
3286 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3288 else if (Ustrncmp(s, "domainlist", 10) == 0)
3289 read_named_list(&domainlist_anchor, &domainlist_count,
3290 MAX_NAMED_LIST, s+10, US"domain list");
3292 else if (Ustrncmp(s, "hostlist", 8) == 0)
3293 read_named_list(&hostlist_anchor, &hostlist_count,
3294 MAX_NAMED_LIST, s+8, US"host list");
3296 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3297 read_named_list(&addresslist_anchor, &addresslist_count,
3298 MAX_NAMED_LIST, s+11, US"address list");
3300 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3301 read_named_list(&localpartlist_anchor, &localpartlist_count,
3302 MAX_NAMED_LIST, s+13, US"local part list");
3305 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3306 NULL, US"main option \"%s\" unknown");
3310 /* If local_sender_retain is set, local_from_check must be unset. */
3312 if (local_sender_retain && local_from_check)
3313 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3314 "local_sender_retain are set; this combination is not allowed");
3316 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3319 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3321 /* The max retry interval must not be greater than 24 hours. */
3323 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3325 /* remote_max_parallel must be > 0 */
3327 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3329 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3330 start of a new SMTP message. */
3332 freeze_tell_config = freeze_tell;
3334 /* The primary host name may be required for expansion of spool_directory
3335 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3336 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3337 canonize it. Some people like upper case letters in their host names, so we
3338 don't force the case. */
3340 if (primary_hostname == NULL)
3342 const uschar *hostname;
3344 if (uname(&uts) < 0)
3345 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3346 hostname = US uts.nodename;
3348 if (Ustrchr(hostname, '.') == NULL)
3351 struct hostent *hostdata;
3354 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3355 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3356 MCL_DOMAIN, TRUE, NULL) != OK))
3365 #if HAVE_GETIPNODEBYNAME
3367 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3369 hostdata = gethostbyname2(CS hostname, af);
3372 hostdata = gethostbyname(CS hostname);
3375 if (hostdata != NULL)
3377 hostname = US hostdata->h_name;
3381 if (af == AF_INET) break;
3386 primary_hostname = string_copy(hostname);
3389 /* Set up default value for smtp_active_hostname */
3391 smtp_active_hostname = primary_hostname;
3393 /* If spool_directory wasn't set in the build-time configuration, it must have
3394 got set above. Of course, writing to the log may not work if log_file_path is
3395 not set, but it will at least get to syslog or somewhere, with any luck. */
3397 if (!*spool_directory)
3398 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3401 /* Expand the spool directory name; it may, for example, contain the primary
3402 host name. Same comment about failure. */
3404 if (!(s = expand_string(spool_directory)))
3405 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3406 "\"%s\": %s", spool_directory, expand_string_message);
3407 spool_directory = s;
3409 /* Expand log_file_path, which must contain "%s" in any component that isn't
3410 the null string or "syslog". It is also allowed to contain one instance of %D
3411 or %M. However, it must NOT contain % followed by anything else. */
3415 const uschar *ss, *sss;
3416 int sep = ':'; /* Fixed for log file path */
3417 if (!(s = expand_string(log_file_path)))
3418 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3419 "\"%s\": %s", log_file_path, expand_string_message);
3422 while ((sss = string_nextinlist(&ss, &sep, big_buffer, big_buffer_size)))
3425 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3426 if (!(t = Ustrstr(sss, "%s")))
3427 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3428 "contain \"%%s\"", sss);
3430 if ((t = Ustrchr(sss, '%')))
3431 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3432 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3433 "unexpected \"%%\" character", s);
3439 /* Interpret syslog_facility into an integer argument for 'ident' param to
3440 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3443 if (syslog_facility_str)
3446 uschar *s = syslog_facility_str;
3448 if ((Ustrlen(syslog_facility_str) >= 4) &&
3449 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3452 for (i = 0; i < syslog_list_size; i++)
3453 if (strcmpic(s, syslog_list[i].name) == 0)
3455 syslog_facility = syslog_list[i].value;
3459 if (i >= syslog_list_size)
3460 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3461 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3464 /* Expand pid_file_path */
3466 if (*pid_file_path != 0)
3468 if (!(s = expand_string(pid_file_path)))
3469 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3470 "\"%s\": %s", pid_file_path, expand_string_message);
3474 /* Set default value of process_log_path */
3476 if (!process_log_path || *process_log_path =='\0')
3477 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3479 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3482 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3484 /* Unpick the SMTP rate limiting options, if set */
3486 if (smtp_ratelimit_mail)
3487 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3488 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3490 if (smtp_ratelimit_rcpt)
3491 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3492 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3494 /* The qualify domains default to the primary host name */
3496 if (!qualify_domain_sender)
3497 qualify_domain_sender = primary_hostname;
3498 if (!qualify_domain_recipient)
3499 qualify_domain_recipient = qualify_domain_sender;
3501 /* Setting system_filter_user in the configuration sets the gid as well if a
3502 name is given, but a numerical value does not. */
3504 if (system_filter_uid_set && !system_filter_gid_set)
3506 struct passwd *pw = getpwuid(system_filter_uid);
3508 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3509 (long int)system_filter_uid);
3510 system_filter_gid = pw->pw_gid;
3511 system_filter_gid_set = TRUE;
3514 /* If the errors_reply_to field is set, check that it is syntactically valid
3515 and ensure it contains a domain. */
3517 if (errors_reply_to)
3520 int start, end, domain;
3521 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3522 &start, &end, &domain, FALSE);
3525 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3526 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3530 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3533 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3534 smtp_accept_max must also be set. */
3536 if (smtp_accept_max == 0 &&
3537 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3538 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3539 "smtp_accept_max must be set if smtp_accept_queue or "
3540 "smtp_accept_max_per_host is set");
3542 /* Set up the host number if anything is specified. It is an expanded string
3543 so that it can be computed from the host name, for example. We do this last
3544 so as to ensure that everything else is set up before the expansion. */
3546 if (host_number_string)
3550 uschar *s = expand_string(host_number_string);
3553 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3554 "failed to expand localhost_number \"%s\": %s",
3555 host_number_string, expand_string_message);
3556 n = Ustrtol(s, &end, 0);
3557 while (isspace(*end)) end++;
3559 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3560 "localhost_number value is not a number: %s", s);
3561 if (n > LOCALHOST_MAX)
3562 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3563 "localhost_number is greater than the maximum allowed value (%d)",
3569 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3571 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3572 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3573 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3574 tls_verify_hosts ? "" : "try_");
3576 /* Magic number: at time of writing, 1024 has been the long-standing value
3577 used by so many clients, and what Exim used to use always, that it makes
3578 sense to just min-clamp this max-clamp at that. */
3579 if (tls_dh_max_bits < 1024)
3580 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3581 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3583 /* If openssl_options is set, validate it */
3584 if (openssl_options)
3587 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3588 "openssl_options is set but we're using GnuTLS");
3591 if (!tls_openssl_options_parse(openssl_options, &dummy))
3592 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3593 "openssl_options parse error: %s", openssl_options);
3596 #endif /*DISABLE_TLS*/
3598 if (!nowarn && !keep_environment && environ && *environ)
3599 log_write(0, LOG_MAIN,
3600 "Warning: purging the environment.\n"
3601 " Suggested action: use keep_environment.");
3606 /*************************************************
3607 * Initialize one driver *
3608 *************************************************/
3610 /* This is called once the driver's generic options, if any, have been read.
3611 We can now find the driver, set up defaults for the private options, and
3612 unset any "set" bits in the private options table (which might have been
3613 set by another incarnation of the same driver).
3616 d pointer to driver instance block, with generic
3618 drivers_available vector of available drivers
3619 size_of_info size of each block in drivers_available
3620 class class of driver, for error message
3622 Returns: pointer to the driver info block
3625 static driver_info *
3626 init_driver(driver_instance *d, driver_info *drivers_available,
3627 int size_of_info, uschar *class)
3629 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3630 dd = (driver_info *)((US dd) + size_of_info))
3631 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3633 int len = dd->options_len;
3635 d->options_block = store_get(len, FALSE);
3636 memcpy(d->options_block, dd->options_block, len);
3637 for (int i = 0; i < *(dd->options_count); i++)
3638 dd->options[i].type &= ~opt_set;
3642 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3643 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3645 return NULL; /* never obeyed */
3651 /*************************************************
3652 * Initialize driver list *
3653 *************************************************/
3655 /* This function is called for routers, transports, and authentication
3656 mechanisms. It reads the data from the current point in the configuration file
3657 up to the end of the section, and sets up a chain of instance blocks according
3658 to the file's contents. The file will already have been opened by a call to
3659 readconf_main, and must be left open for subsequent reading of further data.
3661 Any errors cause a panic crash. Note that the blocks with names driver_info and
3662 driver_instance must map the first portions of all the _info and _instance
3663 blocks for this shared code to work.
3666 class "router", "transport", or "authenticator"
3667 anchor &routers, &transports, &auths
3668 drivers_available available drivers
3669 size_of_info size of each info block
3670 instance_default points to default data for an instance
3671 instance_size size of instance block
3672 driver_optionlist generic option list
3673 driver_optionlist_count count of generic option list
3679 readconf_driver_init(
3681 driver_instance **anchor,
3682 driver_info *drivers_available,
3684 void *instance_default,
3686 optionlist *driver_optionlist,
3687 int driver_optionlist_count)
3689 driver_instance **p = anchor;
3690 driver_instance *d = NULL;
3693 while ((buffer = get_config_line()))
3698 /* Read the first name on the line and test for the start of a new driver. A
3699 macro definition indicates the end of the previous driver. If this isn't the
3700 start of a new driver, the line will be re-read. */
3702 s = readconf_readname(name, sizeof(name), buffer);
3704 /* Handle macro definition, first finishing off the initialization of the
3705 previous driver, if any. */
3707 if (isupper(*name) && *s == '=')
3711 if (!d->driver_name)
3712 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3713 "no driver defined for %s \"%s\"", class, d->name);
3714 /* s is using big_buffer, so this call had better not */
3718 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3722 /* If the line starts with a name terminated by a colon, we are at the
3723 start of the definition of a new driver. The rest of the line must be
3728 /* Finish off initializing the previous driver. */
3732 if (!d->driver_name)
3733 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3734 "no driver defined for %s \"%s\"", class, d->name);
3738 /* Check that we haven't already got a driver of this name */
3740 for (d = *anchor; d; d = d->next)
3741 if (Ustrcmp(name, d->name) == 0)
3742 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3743 "there are two %ss called \"%s\"", class, name);
3745 /* Set up a new driver instance data block on the chain, with
3746 its default values installed. */
3748 d = store_get(instance_size, FALSE);
3749 memcpy(d, instance_default, instance_size);
3752 d->name = string_copy(name);
3754 /* Clear out the "set" bits in the generic options */
3756 for (int i = 0; i < driver_optionlist_count; i++)
3757 driver_optionlist[i].type &= ~opt_set;
3759 /* Check nothing more on this line, then do the next loop iteration. */
3761 while (isspace(*s)) s++;
3762 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3766 /* Not the start of a new driver. Give an error if we have not set up a
3767 current driver yet. */
3770 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3772 /* First look to see if this is a generic option; if it is "driver",
3773 initialize the driver. If is it not a generic option, we can look for a
3774 private option provided that the driver has been previously set up. */
3776 if (readconf_handle_option(buffer, driver_optionlist,
3777 driver_optionlist_count, d, NULL))
3779 if (!d->info && d->driver_name)
3780 init_driver(d, drivers_available, size_of_info, class);
3783 /* Handle private options - pass the generic block because some may
3784 live therein. A flag with each option indicates if it is in the public
3788 readconf_handle_option(buffer, d->info->options,
3789 *(d->info->options_count), d, US"option \"%s\" unknown");
3791 /* The option is not generic and the driver name has not yet been given. */
3793 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3794 "(\"driver\" must be specified before any private options)", name);
3797 /* Run the initialization function for the final driver. */
3801 if (!d->driver_name)
3802 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3803 "no driver defined for %s \"%s\"", class, d->name);
3810 /*************************************************
3811 * Check driver dependency *
3812 *************************************************/
3814 /* This function is passed a driver instance and a string. It checks whether
3815 any of the string options for the driver contains the given string as an
3819 d points to a driver instance block
3820 s the string to search for
3822 Returns: TRUE if a dependency is found
3826 readconf_depends(driver_instance *d, uschar *s)
3828 int count = *(d->info->options_count);
3831 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3833 void *options_block;
3835 int type = ol->type & opt_mask;
3836 if (type != opt_stringptr) continue;
3837 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3838 value = *(uschar **)(US options_block + (long int)(ol->value));
3839 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3841 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3842 isalnum(ss[Ustrlen(s)])) continue;
3843 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3844 d->name, ol->name, s);
3849 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3856 /*************************************************
3857 * Decode an error type for retries *
3858 *************************************************/
3860 /* This function is global because it is also called from the main
3861 program when testing retry information. It decodes strings such as "quota_7d"
3862 into numerical error codes.
3865 pp points to start of text
3866 p points past end of text
3867 basic_errno points to an int to receive the main error number
3868 more_errno points to an int to receive the secondary error data
3870 Returns: NULL if decoded correctly; else points to error text
3874 readconf_retry_error(const uschar *pp, const uschar *p,
3875 int *basic_errno, int *more_errno)
3878 const uschar *q = pp;
3879 while (q < p && *q != '_') q++;
3882 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3884 *basic_errno = ERRNO_EXIMQUOTA;
3885 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3886 return US"bad time value";
3889 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3891 *basic_errno = ECONNREFUSED;
3894 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3895 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3896 else return US"A or MX expected after \"refused\"";
3900 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3902 *basic_errno = ETIMEDOUT;
3906 int xlen = p - q - 1;
3907 const uschar *x = q + 1;
3909 static uschar *extras[] =
3910 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3911 static int values[] =
3912 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3914 for (i = 0; i < nelem(extras); i++)
3915 if (strncmpic(x, extras[i], xlen) == 0)
3917 *more_errno = values[i];
3921 if (i >= nelem(extras))
3922 if (strncmpic(x, US"DNS", xlen) == 0)
3923 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3924 "available in retry rules (it has never worked) - treated as "
3927 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3931 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3932 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3933 strncmpic(pp, US"data_4", 6) == 0)
3936 int x = 255; /* means "any 4xx code" */
3937 if (p != pp + 8) bad = TRUE; else
3939 int a = pp[6], b = pp[7];
3943 if (isdigit(b)) x += b - '0';
3944 else if (b == 'x') x += 100;
3947 else if (a != 'x' || b != 'x') bad = TRUE;
3951 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3952 "x is literal and d is any digit", pp);
3954 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3955 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3956 *more_errno = x << 8;
3959 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3960 strncmpic(q+1, US"failed", p-q-1) == 0)
3961 *basic_errno = ERRNO_AUTHFAIL;
3963 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3964 *basic_errno = ERRNO_SMTPCLOSED;
3966 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3967 *basic_errno = ERRNO_TLSREQUIRED;
3969 else if (strncmpic(pp, US"lookup", p - pp) == 0)
3970 *basic_errno = ERRNO_UNKNOWNHOST;
3972 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3973 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3981 /*************************************************
3982 * Read retry information *
3983 *************************************************/
3985 /* Each line of retry information contains:
3987 . A domain name pattern or an address pattern;
3989 . An error name, possibly with additional data, or *;
3991 . An optional sequence of retry items, each consisting of an identifying
3992 letter, a cutoff time, and optional parameters.
3994 All this is decoded and placed into a control block. */
3997 /* Subroutine to read an argument, preceded by a comma and terminated
3998 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3999 1 = fixed point number (returned *1000).
4002 paddr pointer to pointer to current character; updated
4003 type 0 => read a time; 1 => read a fixed point number
4005 Returns: time in seconds or fixed point number * 1000
4009 retry_arg(const uschar **paddr, int type)
4011 const uschar *p = *paddr;
4014 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4016 while (isspace(*p)) p++;
4018 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4020 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4021 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4026 case 0: return readconf_readtime(pp, *p, FALSE);
4027 case 1: return readconf_readfixed(pp, *p);
4029 return 0; /* Keep picky compilers happy */
4032 /* The function proper */
4035 readconf_retries(void)
4037 retry_config **chain = &retries;
4041 while ((p = get_config_line()))
4043 retry_rule **rchain;
4047 next = store_get(sizeof(retry_config), FALSE);
4050 chain = &(next->next);
4051 next->basic_errno = next->more_errno = 0;
4052 next->senders = NULL;
4054 rchain = &(next->rules);
4056 next->pattern = string_dequote(&p);
4057 while (isspace(*p)) p++;
4059 while (mac_isgraph(*p)) p++;
4060 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4061 "missing error type in retry rule");
4063 /* Test error names for things we understand. */
4065 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4066 &next->more_errno)))
4067 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4069 /* There may be an optional address list of senders to be used as another
4070 constraint on the rule. This was added later, so the syntax is a bit of a
4071 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4074 while (isspace(*p)) p++;
4075 if (Ustrncmp(p, "senders", 7) == 0)
4078 while (isspace(*p)) p++;
4079 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4080 "\"=\" expected after \"senders\" in retry rule");
4081 while (isspace(*p)) p++;
4082 next->senders = string_dequote(&p);
4085 /* Now the retry rules. Keep the maximum timeout encountered. */
4087 while (isspace(*p)) p++;
4091 retry_rule *rule = store_get(sizeof(retry_rule), FALSE);
4093 rchain = &(rule->next);
4095 rule->rule = toupper(*p++);
4096 rule->timeout = retry_arg(&p, 0);
4097 if (rule->timeout > retry_maximum_timeout)
4098 retry_maximum_timeout = rule->timeout;
4102 case 'F': /* Fixed interval */
4103 rule->p1 = retry_arg(&p, 0);
4106 case 'G': /* Geometrically increasing intervals */
4107 case 'H': /* Ditto, but with randomness */
4108 rule->p1 = retry_arg(&p, 0);
4109 rule->p2 = retry_arg(&p, 1);
4113 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4117 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4118 (rule->rule != 'F' && rule->p2 < 1000))
4119 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4120 "bad parameters for retry rule");
4122 while (isspace(*p)) p++;
4126 while (isspace(*p)) p++;
4129 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4136 /*************************************************
4137 * Initialize authenticators *
4138 *************************************************/
4140 /* Read the authenticators section of the configuration file.
4149 #ifndef DISABLE_PIPE_CONNECT
4153 readconf_driver_init(US"authenticator",
4154 (driver_instance **)(&auths), /* chain anchor */
4155 (driver_info *)auths_available, /* available drivers */
4156 sizeof(auth_info), /* size of info block */
4157 &auth_defaults, /* default values for generic options */
4158 sizeof(auth_instance), /* size of instance block */
4159 optionlist_auths, /* generic options */
4160 optionlist_auths_size);
4162 for (auth_instance * au = auths; au; au = au->next)
4164 if (!au->public_name)
4165 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4166 "the %s authenticator", au->name);
4168 for (auth_instance * bu = au->next; bu; bu = bu->next)
4169 if (strcmpic(au->public_name, bu->public_name) == 0)
4170 if ((au->client && bu->client) || (au->server && bu->server))
4171 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4172 "(%s and %s) have the same public name (%s)",
4173 au->client ? US"client" : US"server", au->name, bu->name,
4175 #ifndef DISABLE_PIPE_CONNECT
4179 #ifndef DISABLE_PIPE_CONNECT
4180 f.smtp_in_early_pipe_no_auth = nauths > 16;
4187 /*************************************************
4188 * Read ACL information *
4189 *************************************************/
4191 /* If this run of Exim is not doing something that involves receiving a
4192 message, we can just skip over the ACL information. No need to parse it.
4194 First, we have a function for acl_read() to call back to get the next line. We
4195 need to remember the line we passed, because at the end it will contain the
4196 name of the next ACL. */
4198 static uschar *acl_line;
4203 acl_line = get_config_line();
4208 /* Now the main function:
4219 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4222 acl_line = get_config_line();
4230 p = readconf_readname(name, sizeof(name), acl_line);
4231 if (isupper(*name) && *p == '=')
4233 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4234 acl_line = get_config_line();
4238 if (*p != ':' || name[0] == 0)
4239 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4241 node = store_get(sizeof(tree_node) + Ustrlen(name), is_tainted(name));
4242 Ustrcpy(node->name, name);
4243 if (!tree_insertnode(&acl_anchor, node))
4244 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4245 "there are two ACLs called \"%s\"", name);
4247 node->data.ptr = acl_read(acl_callback, &error);
4249 if (node->data.ptr == NULL && error != NULL)
4250 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4256 /*************************************************
4257 * Read configuration for local_scan() *
4258 *************************************************/
4260 /* This function is called after "begin local_scan" is encountered in the
4261 configuration file. If the local_scan() function allows for configuration
4262 options, we can process them. Otherwise, we expire in a panic.
4269 local_scan_init(void)
4271 #ifndef LOCAL_SCAN_HAS_OPTIONS
4272 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4273 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4277 while ((p = get_config_line()))
4279 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4280 NULL, US"local_scan option \"%s\" unknown");
4287 /*************************************************
4288 * Read rest of configuration (after main) *
4289 *************************************************/
4291 /* This function reads the rest of the runtime configuration, after the main
4292 configuration. It is called only when actually needed. Each subsequent section
4293 of the configuration starts with a line of the form
4297 where the name is "routers", "transports", etc. A section is terminated by
4298 hitting the next "begin" line, and the next name is left in next_section.
4299 Because it may confuse people as to whether the names are singular or plural,
4300 we add "s" if it's missing. There is always enough room in next_section for
4301 this. This function is basically just a switch.
4307 static uschar *section_list[] = {
4321 while(next_section[0] != 0)
4325 int last = nelem(section_list);
4327 int n = Ustrlen(next_section);
4329 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, US"s");
4333 int c = strcmpic(next_section, section_list[mid]);
4335 if (c > 0) first = mid + 1; else last = mid;
4337 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4338 "\"%.*s\" is not a known configuration section name", n, next_section);
4339 mid = (last + first)/2;
4343 if (((had ^= bit) & bit) == 0)
4344 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4345 "\"%.*s\" section is repeated in the configuration file", n,
4350 case 0: readconf_acl(); break;
4351 case 1: auths_init(); break;
4352 case 2: local_scan_init(); break;
4353 case 3: readconf_retries(); break;
4354 case 4: readconf_rewrites(); break;
4355 case 5: route_init(); break;
4356 case 6: transport_init(); break;
4360 (void)fclose(config_file);
4363 /* Init the storage for the pre-parsed config lines */
4365 readconf_save_config(const uschar *s)
4367 save_config_line(string_sprintf("# Exim Configuration (%s)",
4368 f.running_in_test_harness ? US"X" : s));
4372 save_config_position(const uschar *file, int line)
4374 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4377 /* Append a pre-parsed logical line to the config lines store,
4378 this operates on a global (static) list that holds all the pre-parsed
4379 config lines, we do no further processing here, output formatting and
4380 honouring of <hide> or macros will be done during output */
4383 save_config_line(const uschar* line)
4385 static config_line_item *current;
4386 config_line_item *next;
4388 next = (config_line_item*) store_get(sizeof(config_line_item), FALSE);
4389 next->line = string_copy(line);
4392 if (!config_lines) config_lines = next;
4393 else current->next = next;
4398 /* List the parsed config lines, care about nice formatting and
4399 hide the <hide> values unless we're the admin user */
4401 print_config(BOOL admin, BOOL terse)
4403 const int TS = terse ? 0 : 2;
4406 for (config_line_item * i = config_lines; i; i = i->next)
4411 /* skip over to the first non-space */
4412 for (current = i->line; *current && isspace(*current); ++current)
4415 if (*current == '\0')
4418 /* Collapse runs of spaces. We stop this if we encounter one of the
4419 * following characters: "'$, as this may indicate careful formatting */
4420 for (p = current; *p; ++p)
4423 if (!isspace(*p)) continue;
4424 if (*p != ' ') *p = ' ';
4426 for (next = p; isspace(*next); ++next)
4430 memmove(p+1, next, Ustrlen(next)+1);
4432 if (*next == '"' || *next == '\'' || *next == '$')
4437 if (current[0] == '#')
4440 /* begin lines are left aligned */
4441 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4443 if (!terse) puts("");
4448 /* router/acl/transport block names */
4449 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4451 if (!terse) puts("");
4452 printf("%*s%s\n", TS, "", current);
4456 /* hidden lines (all MACROS or lines prefixed with "hide") */
4458 && ( isupper(*current)
4459 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4463 if ((p = Ustrchr(current, '=')))
4466 printf("%*s%s= %s\n", indent, "", current, hidden);
4468 /* e.g.: hide split_spool_directory */
4470 printf("%*s\n", indent, hidden);
4474 /* rest is public */
4475 printf("%*s%s\n", indent, "", current);
4479 #endif /*!MACRO_PREDEF*/
4482 /* End of readconf.c */