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Use C99 initialisations for iterators
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #ifdef MACRO_PREDEF
15 # include "macro_predef.h"
16 #endif
17
18 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
19
20
21 static uschar * syslog_facility_str;
22 static void fn_smtp_receive_timeout(const uschar *, const uschar *);
23
24 /*************************************************
25 * Main configuration options *
26 *************************************************/
27
28 /* The list of options that can be set in the main configuration file. This
29 must be in alphabetic order because it is searched by binary chop. */
30
31 static optionlist optionlist_config[] = {
32 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
33 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
34 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
35 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
36 { "accept_8bitmime", opt_bool, &accept_8bitmime },
37 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
38 #ifdef WITH_CONTENT_SCAN
39 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
40 #endif
41 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
42 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
43 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
44 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
45 #ifndef DISABLE_PRDR
46 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
47 #endif
48 #ifndef DISABLE_DKIM
49 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
50 #endif
51 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
52 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
53 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
54 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
55 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
56 #ifdef WITH_CONTENT_SCAN
57 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
58 #endif
59 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
60 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
61 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
62 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
63 #ifdef SUPPORT_TLS
64 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
65 #endif
66 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
67 { "add_environment", opt_stringptr, &add_environment },
68 { "admin_groups", opt_gidlist, &admin_groups },
69 { "allow_domain_literals", opt_bool, &allow_domain_literals },
70 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
71 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
72 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
73 { "auto_thaw", opt_time, &auto_thaw },
74 #ifdef WITH_CONTENT_SCAN
75 { "av_scanner", opt_stringptr, &av_scanner },
76 #endif
77 { "bi_command", opt_stringptr, &bi_command },
78 #ifdef EXPERIMENTAL_BRIGHTMAIL
79 { "bmi_config_file", opt_stringptr, &bmi_config_file },
80 #endif
81 { "bounce_message_file", opt_stringptr, &bounce_message_file },
82 { "bounce_message_text", opt_stringptr, &bounce_message_text },
83 { "bounce_return_body", opt_bool, &bounce_return_body },
84 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
85 { "bounce_return_message", opt_bool, &bounce_return_message },
86 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
87 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
88 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
89 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
90 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
91 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
92 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
93 { "check_log_inodes", opt_int, &check_log_inodes },
94 { "check_log_space", opt_Kint, &check_log_space },
95 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
96 { "check_spool_inodes", opt_int, &check_spool_inodes },
97 { "check_spool_space", opt_Kint, &check_spool_space },
98 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
99 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
100 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
101 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
102 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
103 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
104 #ifdef EXPERIMENTAL_DCC
105 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
106 { "dccifd_address", opt_stringptr, &dccifd_address },
107 { "dccifd_options", opt_stringptr, &dccifd_options },
108 #endif
109 { "debug_store", opt_bool, &debug_store },
110 { "delay_warning", opt_timelist, &delay_warning },
111 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
112 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
113 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
114 { "delivery_date_remove", opt_bool, &delivery_date_remove },
115 #ifdef ENABLE_DISABLE_FSYNC
116 { "disable_fsync", opt_bool, &disable_fsync },
117 #endif
118 { "disable_ipv6", opt_bool, &disable_ipv6 },
119 #ifndef DISABLE_DKIM
120 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
121 #endif
122 #ifdef EXPERIMENTAL_DMARC
123 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
124 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
125 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
126 #endif
127 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
128 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
129 { "dns_cname_loops", opt_int, &dns_cname_loops },
130 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
131 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
132 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
133 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
134 { "dns_retrans", opt_time, &dns_retrans },
135 { "dns_retry", opt_int, &dns_retry },
136 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
137 { "dns_use_edns0", opt_int, &dns_use_edns0 },
138 /* This option is now a no-op, retained for compatibility */
139 { "drop_cr", opt_bool, &drop_cr },
140 /*********************************************************/
141 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
142 { "dsn_from", opt_stringptr, &dsn_from },
143 { "envelope_to_remove", opt_bool, &envelope_to_remove },
144 { "errors_copy", opt_stringptr, &errors_copy },
145 { "errors_reply_to", opt_stringptr, &errors_reply_to },
146 #ifndef DISABLE_EVENT
147 { "event_action", opt_stringptr, &event_action },
148 #endif
149 { "exim_group", opt_gid, &exim_gid },
150 { "exim_path", opt_stringptr, &exim_path },
151 { "exim_user", opt_uid, &exim_uid },
152 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
153 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
154 { "finduser_retries", opt_int, &finduser_retries },
155 { "freeze_tell", opt_stringptr, &freeze_tell },
156 { "gecos_name", opt_stringptr, &gecos_name },
157 { "gecos_pattern", opt_stringptr, &gecos_pattern },
158 #ifdef SUPPORT_TLS
159 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
160 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
161 #endif
162 { "header_line_maxsize", opt_int, &header_line_maxsize },
163 { "header_maxsize", opt_int, &header_maxsize },
164 { "headers_charset", opt_stringptr, &headers_charset },
165 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
166 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
167 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
168 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
169 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
170 { "hold_domains", opt_stringptr, &hold_domains },
171 { "host_lookup", opt_stringptr, &host_lookup },
172 { "host_lookup_order", opt_stringptr, &host_lookup_order },
173 { "host_reject_connection", opt_stringptr, &host_reject_connection },
174 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
175 #ifdef SUPPORT_PROXY
176 { "hosts_proxy", opt_stringptr, &hosts_proxy },
177 #endif
178 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
179 #ifdef LOOKUP_IBASE
180 { "ibase_servers", opt_stringptr, &ibase_servers },
181 #endif
182 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
183 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
184 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
185 { "keep_environment", opt_stringptr, &keep_environment },
186 { "keep_malformed", opt_time, &keep_malformed },
187 #ifdef LOOKUP_LDAP
188 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
189 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
190 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
191 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
192 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
193 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
194 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
195 { "ldap_start_tls", opt_bool, &eldap_start_tls },
196 { "ldap_version", opt_int, &eldap_version },
197 #endif
198 { "local_from_check", opt_bool, &local_from_check },
199 { "local_from_prefix", opt_stringptr, &local_from_prefix },
200 { "local_from_suffix", opt_stringptr, &local_from_suffix },
201 { "local_interfaces", opt_stringptr, &local_interfaces },
202 #ifdef HAVE_LOCAL_SCAN
203 { "local_scan_timeout", opt_time, &local_scan_timeout },
204 #endif
205 { "local_sender_retain", opt_bool, &local_sender_retain },
206 { "localhost_number", opt_stringptr, &host_number_string },
207 { "log_file_path", opt_stringptr, &log_file_path },
208 { "log_selector", opt_stringptr, &log_selector_string },
209 { "log_timezone", opt_bool, &log_timezone },
210 { "lookup_open_max", opt_int, &lookup_open_max },
211 { "max_username_length", opt_int, &max_username_length },
212 { "message_body_newlines", opt_bool, &message_body_newlines },
213 { "message_body_visible", opt_mkint, &message_body_visible },
214 { "message_id_header_domain", opt_stringptr, &message_id_domain },
215 { "message_id_header_text", opt_stringptr, &message_id_text },
216 { "message_logs", opt_bool, &message_logs },
217 { "message_size_limit", opt_stringptr, &message_size_limit },
218 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
219 { "move_frozen_messages", opt_bool, &move_frozen_messages },
220 #endif
221 { "mua_wrapper", opt_bool, &mua_wrapper },
222 #ifdef LOOKUP_MYSQL
223 { "mysql_servers", opt_stringptr, &mysql_servers },
224 #endif
225 { "never_users", opt_uidlist, &never_users },
226 #ifdef SUPPORT_TLS
227 { "openssl_options", opt_stringptr, &openssl_options },
228 #endif
229 #ifdef LOOKUP_ORACLE
230 { "oracle_servers", opt_stringptr, &oracle_servers },
231 #endif
232 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
233 #ifdef EXIM_PERL
234 { "perl_at_start", opt_bool, &opt_perl_at_start },
235 { "perl_startup", opt_stringptr, &opt_perl_startup },
236 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
237 #endif
238 #ifdef LOOKUP_PGSQL
239 { "pgsql_servers", opt_stringptr, &pgsql_servers },
240 #endif
241 { "pid_file_path", opt_stringptr, &pid_file_path },
242 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
243 #ifdef EXPERIMENTAL_PIPE_CONNECT
244 { "pipelining_connect_advertise_hosts", opt_stringptr,
245 &pipe_connect_advertise_hosts },
246 #endif
247 #ifndef DISABLE_PRDR
248 { "prdr_enable", opt_bool, &prdr_enable },
249 #endif
250 { "preserve_message_logs", opt_bool, &preserve_message_logs },
251 { "primary_hostname", opt_stringptr, &primary_hostname },
252 { "print_topbitchars", opt_bool, &print_topbitchars },
253 { "process_log_path", opt_stringptr, &process_log_path },
254 { "prod_requires_admin", opt_bool, &prod_requires_admin },
255 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
256 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
257 { "queue_domains", opt_stringptr, &queue_domains },
258 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
259 { "queue_only", opt_bool, &queue_only },
260 { "queue_only_file", opt_stringptr, &queue_only_file },
261 { "queue_only_load", opt_fixed, &queue_only_load },
262 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
263 { "queue_only_override", opt_bool, &queue_only_override },
264 { "queue_run_in_order", opt_bool, &queue_run_in_order },
265 { "queue_run_max", opt_stringptr, &queue_run_max },
266 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
267 { "receive_timeout", opt_time, &receive_timeout },
268 { "received_header_text", opt_stringptr, &received_header_text },
269 { "received_headers_max", opt_int, &received_headers_max },
270 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
271 { "recipients_max", opt_int, &recipients_max },
272 { "recipients_max_reject", opt_bool, &recipients_max_reject },
273 #ifdef LOOKUP_REDIS
274 { "redis_servers", opt_stringptr, &redis_servers },
275 #endif
276 { "remote_max_parallel", opt_int, &remote_max_parallel },
277 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
278 { "retry_data_expire", opt_time, &retry_data_expire },
279 { "retry_interval_max", opt_time, &retry_interval_max },
280 { "return_path_remove", opt_bool, &return_path_remove },
281 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
282 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
283 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
284 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
285 { "slow_lookup_log", opt_int, &slow_lookup_log },
286 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
287 { "smtp_accept_max", opt_int, &smtp_accept_max },
288 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
289 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
290 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
291 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
292 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
293 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
294 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
295 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
296 { "smtp_banner", opt_stringptr, &smtp_banner },
297 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
298 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
299 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
300 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
301 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
302 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
303 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
304 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
305 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
306 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
307 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
308 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
309 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
310 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
311 #ifdef SUPPORT_I18N
312 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
313 #endif
314 #ifdef WITH_CONTENT_SCAN
315 { "spamd_address", opt_stringptr, &spamd_address },
316 #endif
317 #ifdef SUPPORT_SPF
318 { "spf_guess", opt_stringptr, &spf_guess },
319 #endif
320 { "split_spool_directory", opt_bool, &split_spool_directory },
321 { "spool_directory", opt_stringptr, &spool_directory },
322 { "spool_wireformat", opt_bool, &spool_wireformat },
323 #ifdef LOOKUP_SQLITE
324 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
325 #endif
326 #ifdef EXPERIMENTAL_SRS
327 { "srs_config", opt_stringptr, &srs_config },
328 { "srs_hashlength", opt_int, &srs_hashlength },
329 { "srs_hashmin", opt_int, &srs_hashmin },
330 { "srs_maxage", opt_int, &srs_maxage },
331 { "srs_secrets", opt_stringptr, &srs_secrets },
332 { "srs_usehash", opt_bool, &srs_usehash },
333 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
334 #endif
335 { "strict_acl_vars", opt_bool, &strict_acl_vars },
336 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
337 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
338 { "syslog_duplication", opt_bool, &syslog_duplication },
339 { "syslog_facility", opt_stringptr, &syslog_facility_str },
340 { "syslog_pid", opt_bool, &syslog_pid },
341 { "syslog_processname", opt_stringptr, &syslog_processname },
342 { "syslog_timestamp", opt_bool, &syslog_timestamp },
343 { "system_filter", opt_stringptr, &system_filter },
344 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
345 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
346 { "system_filter_group", opt_gid, &system_filter_gid },
347 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
348 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
349 { "system_filter_user", opt_uid, &system_filter_uid },
350 { "tcp_nodelay", opt_bool, &tcp_nodelay },
351 #ifdef USE_TCP_WRAPPERS
352 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
353 #endif
354 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
355 { "timezone", opt_stringptr, &timezone_string },
356 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
357 #ifdef SUPPORT_TLS
358 # ifdef EXPERIMENTAL_REQUIRETLS
359 { "tls_advertise_requiretls", opt_stringptr, &tls_advertise_requiretls },
360 # endif
361 { "tls_certificate", opt_stringptr, &tls_certificate },
362 { "tls_crl", opt_stringptr, &tls_crl },
363 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
364 { "tls_dhparam", opt_stringptr, &tls_dhparam },
365 { "tls_eccurve", opt_stringptr, &tls_eccurve },
366 # ifndef DISABLE_OCSP
367 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
368 # endif
369 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
370 { "tls_privatekey", opt_stringptr, &tls_privatekey },
371 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
372 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
373 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
374 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
375 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
376 #endif
377 { "trusted_groups", opt_gidlist, &trusted_groups },
378 { "trusted_users", opt_uidlist, &trusted_users },
379 { "unknown_login", opt_stringptr, &unknown_login },
380 { "unknown_username", opt_stringptr, &unknown_username },
381 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
382 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
383 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
384 { "warn_message_file", opt_stringptr, &warn_message_file },
385 { "write_rejectlog", opt_bool, &write_rejectlog }
386 };
387
388 #ifndef MACRO_PREDEF
389 static int optionlist_config_size = nelem(optionlist_config);
390 #endif
391
392
393 #ifdef MACRO_PREDEF
394
395 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
396
397 void
398 options_main(void)
399 {
400 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
401 }
402
403 void
404 options_auths(void)
405 {
406 uschar buf[64];
407
408 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
409
410 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
411 {
412 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
413 builtin_macro_create(buf);
414 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
415 }
416 }
417
418 void
419 options_logging(void)
420 {
421 uschar buf[64];
422
423 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
424 {
425 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
426 builtin_macro_create(buf);
427 }
428 }
429
430
431 #else /*!MACRO_PREDEF*/
432
433 extern char **environ;
434
435 static void save_config_line(const uschar* line);
436 static void save_config_position(const uschar *file, int line);
437 static void print_config(BOOL admin, BOOL terse);
438
439
440 #define CSTATE_STACK_SIZE 10
441
442 const uschar *config_directory = NULL;
443
444
445 /* Structure for chain (stack) of .included files */
446
447 typedef struct config_file_item {
448 struct config_file_item *next;
449 const uschar *filename;
450 const uschar *directory;
451 FILE *file;
452 int lineno;
453 } config_file_item;
454
455 /* Structure for chain of configuration lines (-bP config) */
456
457 typedef struct config_line_item {
458 struct config_line_item *next;
459 uschar *line;
460 } config_line_item;
461
462 static config_line_item* config_lines;
463
464 /* Structure of table of conditional words and their state transitions */
465
466 typedef struct cond_item {
467 uschar *name;
468 int namelen;
469 int action1;
470 int action2;
471 int pushpop;
472 } cond_item;
473
474 /* Structure of table of syslog facility names and values */
475
476 typedef struct syslog_fac_item {
477 uschar *name;
478 int value;
479 } syslog_fac_item;
480
481 /* constants */
482 static const char * const hidden = "<value not displayable>";
483
484 /* Static variables */
485
486 static config_file_item *config_file_stack = NULL; /* For includes */
487
488 static uschar *syslog_facility_str = NULL;
489 static uschar next_section[24];
490 static uschar time_buffer[24];
491
492 /* State variables for conditional loading (.ifdef / .else / .endif) */
493
494 static int cstate = 0;
495 static int cstate_stack_ptr = -1;
496 static int cstate_stack[CSTATE_STACK_SIZE];
497
498 /* Table of state transitions for handling conditional inclusions. There are
499 four possible state transitions:
500
501 .ifdef true
502 .ifdef false
503 .elifdef true (or .else)
504 .elifdef false
505
506 .endif just causes the previous cstate to be popped off the stack */
507
508 static int next_cstate[3][4] =
509 {
510 /* State 0: reading from file, or reading until next .else or .endif */
511 { 0, 1, 2, 2 },
512 /* State 1: condition failed, skipping until next .else or .endif */
513 { 2, 2, 0, 1 },
514 /* State 2: skipping until .endif */
515 { 2, 2, 2, 2 },
516 };
517
518 /* Table of conditionals and the states to set. For each name, there are four
519 values: the length of the name (to save computing it each time), the state to
520 set if a macro was found in the line, the state to set if a macro was not found
521 in the line, and a stack manipulation setting which is:
522
523 -1 pull state value off the stack
524 0 don't alter the stack
525 +1 push value onto stack, before setting new state
526 */
527
528 static cond_item cond_list[] = {
529 { US"ifdef", 5, 0, 1, 1 },
530 { US"ifndef", 6, 1, 0, 1 },
531 { US"elifdef", 7, 2, 3, 0 },
532 { US"elifndef", 8, 3, 2, 0 },
533 { US"else", 4, 2, 2, 0 },
534 { US"endif", 5, 0, 0, -1 }
535 };
536
537 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
538
539 /* Table of syslog facility names and their values */
540
541 static syslog_fac_item syslog_list[] = {
542 { US"mail", LOG_MAIL },
543 { US"user", LOG_USER },
544 { US"news", LOG_NEWS },
545 { US"uucp", LOG_UUCP },
546 { US"local0", LOG_LOCAL0 },
547 { US"local1", LOG_LOCAL1 },
548 { US"local2", LOG_LOCAL2 },
549 { US"local3", LOG_LOCAL3 },
550 { US"local4", LOG_LOCAL4 },
551 { US"local5", LOG_LOCAL5 },
552 { US"local6", LOG_LOCAL6 },
553 { US"local7", LOG_LOCAL7 },
554 { US"daemon", LOG_DAEMON }
555 };
556
557 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
558
559
560
561
562 /*************************************************
563 * Find the name of an option *
564 *************************************************/
565
566 /* This function is to aid debugging. Various functions take arguments that are
567 pointer variables in the options table or in option tables for various drivers.
568 For debugging output, it is useful to be able to find the name of the option
569 which is currently being processed. This function finds it, if it exists, by
570 searching the table(s).
571
572 Arguments: a value that is presumed to be in the table above
573 Returns: the option name, or an empty string
574 */
575
576 uschar *
577 readconf_find_option(void *p)
578 {
579 for (int i = 0; i < nelem(optionlist_config); i++)
580 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
581
582 for (router_instance * r = routers; r; r = r->next)
583 {
584 router_info *ri = r->info;
585 for (int i = 0; i < *ri->options_count; i++)
586 {
587 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
588 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
589 return US ri->options[i].name;
590 }
591 }
592
593 for (transport_instance * t = transports; t; t = t->next)
594 {
595 transport_info *ti = t->info;
596 for (int i = 0; i < *ti->options_count; i++)
597 {
598 optionlist * op = &ti->options[i];
599 if ((op->type & opt_mask) != opt_stringptr) continue;
600 if (p == ( op->type & opt_public
601 ? CS t
602 : CS t->options_block
603 )
604 + (long int)op->value)
605 return US op->name;
606 }
607 }
608
609 return US"";
610 }
611
612
613
614
615 /*************************************************
616 * Deal with an assignment to a macro *
617 *************************************************/
618
619 /* We have a new definition; append to the list.
620
621 Args:
622 name Name of the macro; will be copied
623 val Expansion result for the macro; will be copied
624 */
625
626 macro_item *
627 macro_create(const uschar * name, const uschar * val, BOOL command_line)
628 {
629 macro_item * m = store_get(sizeof(macro_item));
630
631 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
632 m->next = NULL;
633 m->command_line = command_line;
634 m->namelen = Ustrlen(name);
635 m->replen = Ustrlen(val);
636 m->name = string_copy(name);
637 m->replacement = string_copy(val);
638 if (mlast)
639 mlast->next = m;
640 else
641 macros = m;
642 mlast = m;
643 if (!macros_user)
644 macros_user = m;
645 return m;
646 }
647
648
649 /* This function is called when a line that starts with an upper case letter is
650 encountered. The argument "line" should contain a complete logical line, and
651 start with the first letter of the macro name. The macro name and the
652 replacement text are extracted and stored. Redefinition of existing,
653 non-command line, macros is permitted using '==' instead of '='.
654
655 Arguments:
656 s points to the start of the logical line
657
658 Returns: FALSE iff fatal error
659 */
660
661 BOOL
662 macro_read_assignment(uschar *s)
663 {
664 uschar name[64];
665 int namelen = 0;
666 BOOL redef = FALSE;
667 macro_item *m;
668
669 while (isalnum(*s) || *s == '_')
670 {
671 if (namelen >= sizeof(name) - 1)
672 {
673 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
674 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
675 return FALSE;
676 }
677 name[namelen++] = *s++;
678 }
679 name[namelen] = 0;
680
681 while (isspace(*s)) s++;
682 if (*s++ != '=')
683 {
684 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
685 return FALSE;
686 }
687
688 if (*s == '=')
689 {
690 redef = TRUE;
691 s++;
692 }
693 while (isspace(*s)) s++;
694
695 /* If an existing macro of the same name was defined on the command line, we
696 just skip this definition. It's an error to attempt to redefine a macro without
697 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
698 It is also an error to define a macro whose name begins with the name of a
699 previously defined macro. This is the requirement that make using a tree
700 for macros hard; we must check all macros for the substring. Perhaps a
701 sorted list, and a bsearch, would work?
702 Note: it is documented that the other way round works. */
703
704 for (m = macros; m; m = m->next)
705 {
706 if (Ustrcmp(m->name, name) == 0)
707 {
708 if (!m->command_line && !redef)
709 {
710 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
711 "defined (use \"==\" if you want to redefine it)", name);
712 return FALSE;
713 }
714 break;
715 }
716
717 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
718 {
719 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
720 "a macro because previously defined macro \"%s\" is a substring",
721 name, m->name);
722 return FALSE;
723 }
724
725 /* We cannot have this test, because it is documented that a substring
726 macro is permitted (there is even an example).
727 *
728 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
729 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
730 * "a macro because it is a substring of previously defined macro \"%s\"",
731 * name, m->name);
732 */
733 }
734
735 /* Check for an overriding command-line definition. */
736
737 if (m && m->command_line) return TRUE;
738
739 /* Redefinition must refer to an existing macro. */
740
741 if (redef)
742 if (m)
743 {
744 m->replen = Ustrlen(s);
745 m->replacement = string_copy(s);
746 }
747 else
748 {
749 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
750 "\"%s\"", name);
751 return FALSE;
752 }
753
754 /* We have a new definition. */
755 else
756 (void) macro_create(name, s, FALSE);
757 return TRUE;
758 }
759
760
761
762
763
764 /* Process line for macros. The line is in big_buffer starting at offset len.
765 Expand big_buffer if needed. Handle definitions of new macros, and
766 macro expansions, rewriting the line in the buffer.
767
768 Arguments:
769 len Offset in buffer of start of line
770 newlen Pointer to offset of end of line, updated on return
771 macro_found Pointer to return that a macro was expanded
772
773 Return: pointer to first nonblank char in line
774 */
775
776 uschar *
777 macros_expand(int len, int * newlen, BOOL * macro_found)
778 {
779 uschar * ss = big_buffer + len;
780 uschar * s;
781
782 /* Find the true start of the physical line - leading spaces are always
783 ignored. */
784
785 while (isspace(*ss)) ss++;
786
787 /* Process the physical line for macros. If this is the start of the logical
788 line, skip over initial text at the start of the line if it starts with an
789 upper case character followed by a sequence of name characters and an equals
790 sign, because that is the definition of a new macro, and we don't do
791 replacement therein. */
792
793 s = ss;
794 if (len == 0 && isupper(*s))
795 {
796 while (isalnum(*s) || *s == '_') s++;
797 while (isspace(*s)) s++;
798 if (*s != '=') s = ss; /* Not a macro definition */
799 }
800
801 /* Skip leading chars which cannot start a macro name, to avoid multiple
802 pointless rescans in Ustrstr calls. */
803
804 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
805
806 /* For each defined macro, scan the line (from after XXX= if present),
807 replacing all occurrences of the macro. */
808
809 *macro_found = FALSE;
810 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
811 {
812 uschar * p, *pp;
813 uschar * t;
814
815 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
816 if (!*s) break;
817
818 t = s;
819 while ((p = Ustrstr(t, m->name)) != NULL)
820 {
821 int moveby;
822
823 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
824 m->name, (int) Ustrlen(ss)-1, ss);
825 /* Expand the buffer if necessary */
826
827 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
828 {
829 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
830 uschar *newbuffer = store_malloc(newsize);
831 memcpy(newbuffer, big_buffer, *newlen + 1);
832 p = newbuffer + (p - big_buffer);
833 s = newbuffer + (s - big_buffer);
834 ss = newbuffer + (ss - big_buffer);
835 t = newbuffer + (t - big_buffer);
836 big_buffer_size = newsize;
837 store_free(big_buffer);
838 big_buffer = newbuffer;
839 }
840
841 /* Shuffle the remaining characters up or down in the buffer before
842 copying in the replacement text. Don't rescan the replacement for this
843 same macro. */
844
845 pp = p + m->namelen;
846 if ((moveby = m->replen - m->namelen) != 0)
847 {
848 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
849 *newlen += moveby;
850 }
851 Ustrncpy(p, m->replacement, m->replen);
852 t = p + m->replen;
853 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
854 *macro_found = TRUE;
855 }
856 }
857
858 /* An empty macro replacement at the start of a line could mean that ss no
859 longer points to the first non-blank character. */
860
861 while (isspace(*ss)) ss++;
862 return ss;
863 }
864
865 /*************************************************
866 * Read configuration line *
867 *************************************************/
868
869 /* A logical line of text is read from the configuration file into the big
870 buffer, taking account of macros, .includes, and continuations. The size of
871 big_buffer is increased if necessary. The count of configuration lines is
872 maintained. Physical input lines starting with # (ignoring leading white space,
873 and after macro replacement) and empty logical lines are always ignored.
874 Leading and trailing spaces are removed.
875
876 If we hit a line of the form "begin xxxx", the xxxx is placed in the
877 next_section vector, and the function returns NULL, indicating the end of a
878 configuration section. On end-of-file, NULL is returned with next_section
879 empty.
880
881 Arguments: none
882
883 Returns: a pointer to the first non-blank in the line,
884 or NULL if eof or end of section is reached
885 */
886
887 static uschar *
888 get_config_line(void)
889 {
890 int startoffset = 0; /* To first non-blank char in logical line */
891 int len = 0; /* Of logical line so far */
892 int newlen;
893 uschar *s, *ss;
894 BOOL macro_found;
895
896 /* Loop for handling continuation lines, skipping comments, and dealing with
897 .include files. */
898
899 for (;;)
900 {
901 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
902 {
903 if (config_file_stack != NULL) /* EOF inside .include */
904 {
905 (void)fclose(config_file);
906 config_file = config_file_stack->file;
907 config_filename = config_file_stack->filename;
908 config_directory = config_file_stack->directory;
909 config_lineno = config_file_stack->lineno;
910 config_file_stack = config_file_stack->next;
911 if (config_lines)
912 save_config_position(config_filename, config_lineno);
913 continue;
914 }
915
916 /* EOF at top level */
917
918 if (cstate_stack_ptr >= 0)
919 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
920 "Unexpected end of configuration file: .endif missing");
921
922 if (len != 0) break; /* EOF after continuation */
923 next_section[0] = 0; /* EOF at start of logical line */
924 return NULL;
925 }
926
927 config_lineno++;
928 newlen = len + Ustrlen(big_buffer + len);
929
930 if (config_lines && config_lineno == 1)
931 save_config_position(config_filename, config_lineno);
932
933 /* Handle pathologically long physical lines - yes, it did happen - by
934 extending big_buffer at this point. The code also copes with very long
935 logical lines. */
936
937 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
938 {
939 uschar *newbuffer;
940 big_buffer_size += BIG_BUFFER_SIZE;
941 newbuffer = store_malloc(big_buffer_size);
942
943 /* This use of strcpy is OK because we know that the string in the old
944 buffer is shorter than the new buffer. */
945
946 Ustrcpy(newbuffer, big_buffer);
947 store_free(big_buffer);
948 big_buffer = newbuffer;
949 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
950 break;
951 newlen += Ustrlen(big_buffer + newlen);
952 }
953
954 ss = macros_expand(len, &newlen, &macro_found);
955
956 /* Check for comment lines - these are physical lines. */
957
958 if (*ss == '#') continue;
959
960 /* Handle conditionals, which are also applied to physical lines. Conditions
961 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
962 expansion occured on the rest of the line. A preliminary test for the leading
963 '.' saves effort on most lines. */
964
965 if (*ss == '.')
966 {
967 int i;
968
969 /* Search the list of conditional directives */
970
971 for (i = 0; i < cond_list_size; i++)
972 {
973 int n;
974 cond_item *c = cond_list+i;
975 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
976
977 /* The following character must be white space or end of string */
978
979 n = ss[1 + c->namelen];
980 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
981
982 /* .ifdef and .ifndef push the current state onto the stack, then set
983 a new one from the table. Stack overflow is an error */
984
985 if (c->pushpop > 0)
986 {
987 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
989 ".%s nested too deeply", c->name);
990 cstate_stack[++cstate_stack_ptr] = cstate;
991 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
992 }
993
994 /* For any of the others, stack underflow is an error. The next state
995 comes either from the stack (.endif) or from the table. */
996
997 else
998 {
999 if (cstate_stack_ptr < 0)
1000 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1001 ".%s without matching .ifdef", c->name);
1002 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1003 next_cstate[cstate][macro_found? c->action1 : c->action2];
1004 }
1005
1006 /* Having dealt with a directive, break the loop */
1007
1008 break;
1009 }
1010
1011 /* If we have handled a conditional directive, continue with the next
1012 physical line. Otherwise, fall through. */
1013
1014 if (i < cond_list_size) continue;
1015 }
1016
1017 /* If the conditional state is not 0 (actively using these lines), ignore
1018 this input line. */
1019
1020 if (cstate != 0) continue; /* Conditional skip */
1021
1022 /* Handle .include lines - these are also physical lines. */
1023
1024 if (Ustrncmp(ss, ".include", 8) == 0 &&
1025 (isspace(ss[8]) ||
1026 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1027 {
1028 uschar *t;
1029 int include_if_exists = isspace(ss[8])? 0 : 10;
1030 config_file_item *save;
1031 struct stat statbuf;
1032
1033 ss += 9 + include_if_exists;
1034 while (isspace(*ss)) ss++;
1035 t = ss + Ustrlen(ss);
1036 while (t > ss && isspace(t[-1])) t--;
1037 if (*ss == '\"' && t[-1] == '\"')
1038 {
1039 ss++;
1040 t--;
1041 }
1042 *t = 0;
1043
1044 /* We allow relative file names. For security reasons currently
1045 relative names not allowed with .include_if_exists. For .include_if_exists
1046 we need to check the permissions/ownership of the containing folder */
1047 if (*ss != '/')
1048 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1049 "absolute path \"%s\"", ss);
1050 else
1051 {
1052 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1053 ss = string_from_gstring(g);
1054 }
1055
1056 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1057
1058 if (config_lines)
1059 save_config_position(config_filename, config_lineno);
1060 save = store_get(sizeof(config_file_item));
1061 save->next = config_file_stack;
1062 config_file_stack = save;
1063 save->file = config_file;
1064 save->filename = config_filename;
1065 save->directory = config_directory;
1066 save->lineno = config_lineno;
1067
1068 if (!(config_file = Ufopen(ss, "rb")))
1069 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1070 "configuration file %s", ss);
1071
1072 config_filename = string_copy(ss);
1073 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1074 config_lineno = 0;
1075 continue;
1076 }
1077
1078 /* If this is the start of the logical line, remember where the non-blank
1079 data starts. Otherwise shuffle down continuation lines to remove leading
1080 white space. */
1081
1082 if (len == 0)
1083 startoffset = ss - big_buffer;
1084 else
1085 {
1086 s = big_buffer + len;
1087 if (ss > s)
1088 {
1089 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1090 newlen -= ss - s;
1091 }
1092 }
1093
1094 /* Accept the new addition to the line. Remove trailing white space. */
1095
1096 len = newlen;
1097 while (len > 0 && isspace(big_buffer[len-1])) len--;
1098 big_buffer[len] = 0;
1099
1100 /* We are done if the line does not end in backslash and contains some data.
1101 Empty logical lines are ignored. For continuations, remove the backslash and
1102 go round the loop to read the continuation line. */
1103
1104 if (len > 0)
1105 {
1106 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1107 big_buffer[--len] = 0; /* Remove backslash */
1108 }
1109 } /* Loop for reading multiple physical lines */
1110
1111 /* We now have a logical line. Test for the end of a configuration section (or,
1112 more accurately, for the start of the next section). Place the name of the next
1113 section in next_section, and return NULL. If the name given is longer than
1114 next_section, truncate it. It will be unrecognized later, because all the known
1115 section names do fit. Leave space for pluralizing. */
1116
1117 s = big_buffer + startoffset; /* First non-space character */
1118
1119 if (config_lines)
1120 save_config_line(s);
1121
1122 if (strncmpic(s, US"begin ", 6) == 0)
1123 {
1124 s += 6;
1125 while (isspace(*s)) s++;
1126 if (big_buffer + len - s > sizeof(next_section) - 2)
1127 s[sizeof(next_section) - 2] = 0;
1128 Ustrcpy(next_section, s);
1129 return NULL;
1130 }
1131
1132 /* Return the first non-blank character. */
1133
1134 return s;
1135 }
1136
1137
1138
1139 /*************************************************
1140 * Read a name *
1141 *************************************************/
1142
1143 /* The yield is the pointer to the next uschar. Names longer than the
1144 output space are silently truncated. This function is also used from acl.c when
1145 parsing ACLs.
1146
1147 Arguments:
1148 name where to put the name
1149 len length of name
1150 s input pointer
1151
1152 Returns: new input pointer
1153 */
1154
1155 uschar *
1156 readconf_readname(uschar *name, int len, uschar *s)
1157 {
1158 int p = 0;
1159 while (isspace(*s)) s++;
1160 if (isalpha(*s))
1161 {
1162 while (isalnum(*s) || *s == '_')
1163 {
1164 if (p < len-1) name[p++] = *s;
1165 s++;
1166 }
1167 }
1168 name[p] = 0;
1169 while (isspace(*s)) s++;
1170 return s;
1171 }
1172
1173
1174
1175
1176 /*************************************************
1177 * Read a time value *
1178 *************************************************/
1179
1180 /* This function is also called from outside, to read argument
1181 time values. The format of a time value is:
1182
1183 [<n>w][<n>d][<n>h][<n>m][<n>s]
1184
1185 as long as at least one is present. If a format error is encountered,
1186 return a negative value. The value must be terminated by the given
1187 terminator.
1188
1189 Arguments:
1190 s input pointer
1191 terminator required terminating character
1192 return_msec if TRUE, allow fractional seconds and return milliseconds
1193
1194 Returns: the time value, or -1 on syntax error
1195 value is seconds if return_msec is FALSE
1196 value is milliseconds if return_msec is TRUE
1197 */
1198
1199 int
1200 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1201 {
1202 int yield = 0;
1203 for (;;)
1204 {
1205 int value, count;
1206 double fraction;
1207
1208 if (!isdigit(*s)) return -1;
1209 (void)sscanf(CCS s, "%d%n", &value, &count);
1210 s += count;
1211
1212 switch (*s)
1213 {
1214 case 'w': value *= 7;
1215 case 'd': value *= 24;
1216 case 'h': value *= 60;
1217 case 'm': value *= 60;
1218 case 's': s++;
1219 break;
1220
1221 case '.':
1222 if (!return_msec) return -1;
1223 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1224 s += count;
1225 if (*s++ != 's') return -1;
1226 yield += (int)(fraction * 1000.0);
1227 break;
1228
1229 default: return -1;
1230 }
1231
1232 if (return_msec) value *= 1000;
1233 yield += value;
1234 if (*s == terminator) return yield;
1235 }
1236 /* Control never reaches here. */
1237 }
1238
1239
1240
1241 /*************************************************
1242 * Read a fixed point value *
1243 *************************************************/
1244
1245 /* The value is returned *1000
1246
1247 Arguments:
1248 s input pointer
1249 terminator required terminator
1250
1251 Returns: the value, or -1 on error
1252 */
1253
1254 static int
1255 readconf_readfixed(const uschar *s, int terminator)
1256 {
1257 int yield = 0;
1258 int value, count;
1259 if (!isdigit(*s)) return -1;
1260 (void)sscanf(CS s, "%d%n", &value, &count);
1261 s += count;
1262 yield = value * 1000;
1263 if (*s == '.')
1264 {
1265 int m = 100;
1266 while (isdigit((*(++s))))
1267 {
1268 yield += (*s - '0') * m;
1269 m /= 10;
1270 }
1271 }
1272
1273 return (*s == terminator)? yield : (-1);
1274 }
1275
1276
1277
1278 /*************************************************
1279 * Find option in list *
1280 *************************************************/
1281
1282 /* The lists are always in order, so binary chop can be used.
1283
1284 Arguments:
1285 name the option name to search for
1286 ol the first entry in the option list
1287 last one more than the offset of the last entry in the option list
1288
1289 Returns: pointer to an option entry, or NULL if not found
1290 */
1291
1292 static optionlist *
1293 find_option(uschar *name, optionlist *ol, int last)
1294 {
1295 int first = 0;
1296 while (last > first)
1297 {
1298 int middle = (first + last)/2;
1299 int c = Ustrcmp(name, ol[middle].name);
1300
1301 if (c == 0) return ol + middle;
1302 else if (c > 0) first = middle + 1;
1303 else last = middle;
1304 }
1305 return NULL;
1306 }
1307
1308
1309
1310 /*************************************************
1311 * Find a set flag in option list *
1312 *************************************************/
1313
1314 /* Because some versions of Unix make no restrictions on the values of uids and
1315 gids (even negative ones), we cannot represent "unset" by a special value.
1316 There is therefore a separate boolean variable for each one indicating whether
1317 a value is set or not. This function returns a pointer to the boolean, given
1318 the original option name. It is a major disaster if the flag cannot be found.
1319
1320 Arguments:
1321 name the name of the uid or gid option
1322 oltop points to the start of the relevant option list
1323 last one more than the offset of the last item in the option list
1324 data_block NULL when reading main options => data values in the option
1325 list are absolute addresses; otherwise they are byte offsets
1326 in data_block (used for driver options)
1327
1328 Returns: a pointer to the boolean flag.
1329 */
1330
1331 static BOOL *
1332 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1333 {
1334 optionlist *ol;
1335 uschar name2[64];
1336 sprintf(CS name2, "*set_%.50s", name);
1337 ol = find_option(name2, oltop, last);
1338 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1339 "Exim internal error: missing set flag for %s", name);
1340 return (data_block == NULL)? (BOOL *)(ol->value) :
1341 (BOOL *)(US data_block + (long int)(ol->value));
1342 }
1343
1344
1345
1346
1347 /*************************************************
1348 * Output extra characters message and die *
1349 *************************************************/
1350
1351 /* Called when an option line has junk on the end. Sometimes this is because
1352 the sysadmin thinks comments are permitted.
1353
1354 Arguments:
1355 s points to the extra characters
1356 t1..t3 strings to insert in the log message
1357
1358 Returns: doesn't return; dies
1359 */
1360
1361 static void
1362 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1363 {
1364 uschar *comment = US"";
1365 if (*s == '#') comment = US" (# is comment only at line start)";
1366 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1367 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1368 }
1369
1370
1371
1372 /*************************************************
1373 * Read rewrite information *
1374 *************************************************/
1375
1376 /* Each line of rewrite information contains:
1377
1378 . A complete address in the form user@domain, possibly with
1379 leading * for each part; or alternatively, a regex.
1380
1381 . A replacement string (which will be expanded).
1382
1383 . An optional sequence of one-letter flags, indicating which
1384 headers etc. to apply this rule to.
1385
1386 All this is decoded and placed into a control block. The OR of the flags is
1387 maintained in a common word.
1388
1389 Arguments:
1390 p points to the string that makes up the rule
1391 existflags points to the overall flag word
1392 isglobal TRUE if reading global rewrite rules
1393
1394 Returns: the control block for the parsed rule.
1395 */
1396
1397 static rewrite_rule *
1398 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1399 {
1400 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1401
1402 next->next = NULL;
1403 next->key = string_dequote(&p);
1404
1405 while (isspace(*p)) p++;
1406 if (*p == 0)
1407 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1408 "missing rewrite replacement string");
1409
1410 next->flags = 0;
1411 next->replacement = string_dequote(&p);
1412
1413 while (*p != 0) switch (*p++)
1414 {
1415 case ' ': case '\t': break;
1416
1417 case 'q': next->flags |= rewrite_quit; break;
1418 case 'w': next->flags |= rewrite_whole; break;
1419
1420 case 'h': next->flags |= rewrite_all_headers; break;
1421 case 's': next->flags |= rewrite_sender; break;
1422 case 'f': next->flags |= rewrite_from; break;
1423 case 't': next->flags |= rewrite_to; break;
1424 case 'c': next->flags |= rewrite_cc; break;
1425 case 'b': next->flags |= rewrite_bcc; break;
1426 case 'r': next->flags |= rewrite_replyto; break;
1427
1428 case 'E': next->flags |= rewrite_all_envelope; break;
1429 case 'F': next->flags |= rewrite_envfrom; break;
1430 case 'T': next->flags |= rewrite_envto; break;
1431
1432 case 'Q': next->flags |= rewrite_qualify; break;
1433 case 'R': next->flags |= rewrite_repeat; break;
1434
1435 case 'S':
1436 next->flags |= rewrite_smtp;
1437 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1439 "rewrite rule has the S flag but is not a regular expression");
1440 break;
1441
1442 default:
1443 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1444 "unknown rewrite flag character '%c' "
1445 "(could be missing quotes round replacement item)", p[-1]);
1446 break;
1447 }
1448
1449 /* If no action flags are set, set all the "normal" rewrites. */
1450
1451 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1452 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1453
1454 /* Remember which exist, for optimization, and return the rule */
1455
1456 *existflags |= next->flags;
1457 return next;
1458 }
1459
1460
1461
1462
1463 /*************************************************
1464 * Read global rewrite information *
1465 *************************************************/
1466
1467 /* Each line is a single rewrite rule; it is parsed into a control block
1468 by readconf_one_rewrite(), and its flags are ORed into the global flag
1469 word rewrite_existflags. */
1470
1471 void
1472 readconf_rewrites(void)
1473 {
1474 rewrite_rule **chain = &global_rewrite_rules;
1475 uschar *p;
1476
1477 while ((p = get_config_line()) != NULL)
1478 {
1479 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1480 *chain = next;
1481 chain = &(next->next);
1482 }
1483 }
1484
1485
1486
1487 /*************************************************
1488 * Read a string *
1489 *************************************************/
1490
1491 /* Strings are read into the normal store pool. As long we aren't too
1492 near the end of the current block, the string will just use what is necessary
1493 on the top of the stacking pool, because string_cat() uses the extension
1494 mechanism.
1495
1496 Argument:
1497 s the rest of the input line
1498 name the option name (for errors)
1499
1500 Returns: pointer to the string
1501 */
1502
1503 static uschar *
1504 read_string(const uschar *s, const uschar *name)
1505 {
1506 uschar *yield;
1507 const uschar *ss;
1508
1509 if (*s != '\"') return string_copy(s);
1510
1511 ss = s;
1512 yield = string_dequote(&s);
1513
1514 if (s == ss+1 || s[-1] != '\"')
1515 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1516 "missing quote at end of string value for %s", name);
1517
1518 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1519
1520 return yield;
1521 }
1522
1523
1524 /*************************************************
1525 * Custom-handler options *
1526 *************************************************/
1527 static void
1528 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1529 {
1530 if (*str == '$')
1531 smtp_receive_timeout_s = string_copy(str);
1532 else
1533 {
1534 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1535 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1536 if (smtp_receive_timeout < 0)
1537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1538 name);
1539 }
1540 }
1541
1542 /*************************************************
1543 * Handle option line *
1544 *************************************************/
1545
1546 /* This function is called from several places to process a line containing the
1547 setting of an option. The first argument is the line to be decoded; it has been
1548 checked not to be empty and not to start with '#'. Trailing newlines and white
1549 space have been removed. The second argument is a pointer to the list of
1550 variable names that are to be recognized, together with their types and
1551 locations, and the third argument gives the number of entries in the list.
1552
1553 The fourth argument is a pointer to a data block. If it is NULL, then the data
1554 values in the options list are absolute addresses. Otherwise, they are byte
1555 offsets in the data block.
1556
1557 String option data may continue onto several lines; this function reads further
1558 data from config_file if necessary.
1559
1560 The yield of this function is normally zero. If a string continues onto
1561 multiple lines, then the data value is permitted to be followed by a comma
1562 or a semicolon (for use in drivers) and the yield is that character.
1563
1564 Arguments:
1565 buffer contains the configuration line to be handled
1566 oltop points to the start of the relevant option list
1567 last one more than the offset of the last item in the option list
1568 data_block NULL when reading main options => data values in the option
1569 list are absolute addresses; otherwise they are byte offsets
1570 in data_block when they have opt_public set; otherwise
1571 they are byte offsets in data_block->options_block.
1572 unknown_txt format string to use in panic message for unknown option;
1573 must contain %s for option name
1574 if given as NULL, don't panic on unknown option
1575
1576 Returns: TRUE if an option was read successfully,
1577 FALSE false for an unknown option if unknown_txt == NULL,
1578 otherwise panic and die on an unknown option
1579 */
1580
1581 static BOOL
1582 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1583 void *data_block, uschar *unknown_txt)
1584 {
1585 int ptr = 0;
1586 int offset = 0;
1587 int count, type, value;
1588 int issecure = 0;
1589 uid_t uid;
1590 gid_t gid;
1591 BOOL boolvalue = TRUE;
1592 BOOL freesptr = TRUE;
1593 optionlist *ol, *ol2;
1594 struct passwd *pw;
1595 void *reset_point;
1596 int intbase = 0;
1597 uschar *inttype = US"";
1598 uschar *sptr;
1599 uschar *s = buffer;
1600 uschar **str_target;
1601 uschar name[64];
1602 uschar name2[64];
1603
1604 /* There may be leading spaces; thereafter, we expect an option name starting
1605 with a letter. */
1606
1607 while (isspace(*s)) s++;
1608 if (!isalpha(*s))
1609 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1610
1611 /* Read the name of the option, and skip any subsequent white space. If
1612 it turns out that what we read was "hide", set the flag indicating that
1613 this is a secure option, and loop to read the next word. */
1614
1615 for (int n = 0; n < 2; n++)
1616 {
1617 while (isalnum(*s) || *s == '_')
1618 {
1619 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1620 s++;
1621 }
1622 name[ptr] = 0;
1623 while (isspace(*s)) s++;
1624 if (Ustrcmp(name, "hide") != 0) break;
1625 issecure = opt_secure;
1626 ptr = 0;
1627 }
1628
1629 /* Deal with "no_" or "not_" here for booleans */
1630
1631 if (Ustrncmp(name, "no_", 3) == 0)
1632 {
1633 boolvalue = FALSE;
1634 offset = 3;
1635 }
1636
1637 if (Ustrncmp(name, "not_", 4) == 0)
1638 {
1639 boolvalue = FALSE;
1640 offset = 4;
1641 }
1642
1643 /* Search the list for the given name. A non-existent name, or an option that
1644 is set twice, is a disaster. */
1645
1646 if (!(ol = find_option(name + offset, oltop, last)))
1647 {
1648 if (unknown_txt == NULL) return FALSE;
1649 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1650 }
1651
1652 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1653 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1654 "\"%s\" option set for the second time", name);
1655
1656 ol->type |= opt_set | issecure;
1657 type = ol->type & opt_mask;
1658
1659 /* Types with data values must be followed by '='; the "no[t]_" prefix
1660 applies only to boolean values. */
1661
1662 if (type < opt_bool || type > opt_bool_last)
1663 {
1664 if (offset != 0)
1665 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1666 "negation prefix applied to a non-boolean option");
1667 if (*s == 0)
1668 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1669 "unexpected end of line (data missing) after %s", name);
1670 if (*s != '=')
1671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1672 }
1673
1674 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1675 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1676 ultimately expands to one of those values. */
1677
1678 else if (*s != 0 && (offset != 0 || *s != '='))
1679 extra_chars_error(s, US"boolean option ", name, US"");
1680
1681 /* Skip white space after = */
1682
1683 if (*s == '=') while (isspace((*(++s))));
1684
1685 /* If there is a data block and the opt_public flag is not set, change
1686 the data block pointer to the private options block. */
1687
1688 if (data_block != NULL && (ol->type & opt_public) == 0)
1689 data_block = (void *)(((driver_instance *)data_block)->options_block);
1690
1691 /* Now get the data according to the type. */
1692
1693 switch (type)
1694 {
1695 /* If a string value is not enclosed in quotes, it consists of
1696 the rest of the current line, verbatim. Otherwise, string escapes
1697 are processed.
1698
1699 A transport is specified as a string, which is then looked up in the
1700 list of transports. A search type is specified as one of a number of
1701 known strings.
1702
1703 A set or rewrite rules for a driver is specified as a string, which is
1704 then parsed into a suitable chain of control blocks.
1705
1706 Uids and gids are specified as strings which are then looked up in the
1707 passwd file. Lists of uids and gids are similarly specified as colon-
1708 separated strings. */
1709
1710 case opt_stringptr:
1711 case opt_uid:
1712 case opt_gid:
1713 case opt_expand_uid:
1714 case opt_expand_gid:
1715 case opt_uidlist:
1716 case opt_gidlist:
1717 case opt_rewrite:
1718
1719 reset_point = sptr = read_string(s, name);
1720
1721 /* Having read a string, we now have several different ways of using it,
1722 depending on the data type, so do another switch. If keeping the actual
1723 string is not required (because it is interpreted), freesptr is set TRUE,
1724 and at the end we reset the pool. */
1725
1726 switch (type)
1727 {
1728 /* If this was a string, set the variable to point to the new string,
1729 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1730 rules, we still keep the string (for printing), and parse the rules into a
1731 control block and flags word. */
1732
1733 case opt_stringptr:
1734 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1735 : USS (ol->value);
1736 if (ol->type & opt_rep_con)
1737 {
1738 uschar * saved_condition;
1739 /* We already have a condition, we're conducting a crude hack to let
1740 multiple condition rules be chained together, despite storing them in
1741 text form. */
1742 *str_target = string_copy_malloc( (saved_condition = *str_target)
1743 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1744 saved_condition, sptr)
1745 : sptr);
1746 /* TODO(pdp): there is a memory leak here and just below
1747 when we set 3 or more conditions; I still don't
1748 understand the store mechanism enough to know
1749 what's the safe way to free content from an earlier store.
1750 AFAICT, stores stack, so freeing an early stored item also stores
1751 all data alloc'd after it. If we knew conditions were adjacent,
1752 we could survive that, but we don't. So I *think* we need to take
1753 another bit from opt_type to indicate "malloced"; this seems like
1754 quite a hack, especially for this one case. It also means that
1755 we can't ever reclaim the store from the *first* condition.
1756
1757 Because we only do this once, near process start-up, I'm prepared to
1758 let this slide for the time being, even though it rankles. */
1759 }
1760 else if (ol->type & opt_rep_str)
1761 {
1762 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1763 int sep_i = -(int)sep_o;
1764 const uschar * list = sptr;
1765 uschar * s;
1766 gstring * list_o = NULL;
1767
1768 if (*str_target)
1769 {
1770 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1771 list_o = string_cat(list_o, *str_target);
1772 }
1773
1774 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1775 list_o = string_append_listele(list_o, sep_o, s);
1776
1777 if (list_o)
1778 *str_target = string_copy_malloc(string_from_gstring(list_o));
1779 }
1780 else
1781 {
1782 *str_target = sptr;
1783 freesptr = FALSE;
1784 }
1785 break;
1786
1787 case opt_rewrite:
1788 if (data_block)
1789 *USS (US data_block + (long int)(ol->value)) = sptr;
1790 else
1791 *USS (ol->value) = sptr;
1792 freesptr = FALSE;
1793 if (type == opt_rewrite)
1794 {
1795 int sep = 0;
1796 int *flagptr;
1797 uschar *p = sptr;
1798 rewrite_rule **chain;
1799 optionlist *ol3;
1800
1801 sprintf(CS name2, "*%.50s_rules", name);
1802 ol2 = find_option(name2, oltop, last);
1803 sprintf(CS name2, "*%.50s_flags", name);
1804 ol3 = find_option(name2, oltop, last);
1805
1806 if (ol2 == NULL || ol3 == NULL)
1807 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1808 "rewrite rules not available for driver");
1809
1810 if (data_block == NULL)
1811 {
1812 chain = (rewrite_rule **)(ol2->value);
1813 flagptr = (int *)(ol3->value);
1814 }
1815 else
1816 {
1817 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1818 flagptr = (int *)(US data_block + (long int)(ol3->value));
1819 }
1820
1821 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1822 {
1823 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1824 *chain = next;
1825 chain = &(next->next);
1826 }
1827
1828 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1829 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1830 "non-header rewrite - not allowed at transport time -");
1831 }
1832 break;
1833
1834 /* If it was an expanded uid, see if there is any expansion to be
1835 done by checking for the presence of a $ character. If there is, save it
1836 in the corresponding *expand_user option field. Otherwise, fall through
1837 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1838 of data. */
1839
1840 case opt_expand_uid:
1841 sprintf(CS name2, "*expand_%.50s", name);
1842 ol2 = find_option(name2, oltop, last);
1843 if (ol2 != NULL)
1844 {
1845 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1846
1847 if (data_block == NULL)
1848 *((uschar **)(ol2->value)) = ss;
1849 else
1850 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1851
1852 if (ss != NULL)
1853 {
1854 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1855 freesptr = FALSE;
1856 break;
1857 }
1858 }
1859
1860 /* Look up a fixed uid, and also make use of the corresponding gid
1861 if a passwd entry is returned and the gid has not been set. */
1862
1863 case opt_uid:
1864 if (!route_finduser(sptr, &pw, &uid))
1865 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1866 if (data_block == NULL)
1867 *((uid_t *)(ol->value)) = uid;
1868 else
1869 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1870
1871 /* Set the flag indicating a fixed value is set */
1872
1873 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1874
1875 /* Handle matching gid if we have a passwd entry: done by finding the
1876 same name with terminating "user" changed to "group"; if not found,
1877 ignore. Also ignore if the value is already set. */
1878
1879 if (pw == NULL) break;
1880 Ustrcpy(name+Ustrlen(name)-4, "group");
1881 ol2 = find_option(name, oltop, last);
1882 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1883 (ol2->type & opt_mask) == opt_expand_gid))
1884 {
1885 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1886 if (! *set_flag)
1887 {
1888 if (data_block == NULL)
1889 *((gid_t *)(ol2->value)) = pw->pw_gid;
1890 else
1891 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1892 *set_flag = TRUE;
1893 }
1894 }
1895 break;
1896
1897 /* If it was an expanded gid, see if there is any expansion to be
1898 done by checking for the presence of a $ character. If there is, save it
1899 in the corresponding *expand_user option field. Otherwise, fall through
1900 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1901 of data. */
1902
1903 case opt_expand_gid:
1904 sprintf(CS name2, "*expand_%.50s", name);
1905 ol2 = find_option(name2, oltop, last);
1906 if (ol2 != NULL)
1907 {
1908 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1909
1910 if (data_block == NULL)
1911 *((uschar **)(ol2->value)) = ss;
1912 else
1913 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1914
1915 if (ss != NULL)
1916 {
1917 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1918 freesptr = FALSE;
1919 break;
1920 }
1921 }
1922
1923 /* Handle freestanding gid */
1924
1925 case opt_gid:
1926 if (!route_findgroup(sptr, &gid))
1927 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1928 if (data_block == NULL)
1929 *((gid_t *)(ol->value)) = gid;
1930 else
1931 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1932 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1933 break;
1934
1935 /* If it was a uid list, look up each individual entry, and build
1936 a vector of uids, with a count in the first element. Put the vector
1937 in malloc store so we can free the string. (We are reading into
1938 permanent store already.) */
1939
1940 case opt_uidlist:
1941 {
1942 int count = 1;
1943 uid_t *list;
1944 int ptr = 0;
1945 const uschar *p;
1946 const uschar *op = expand_string (sptr);
1947
1948 if (op == NULL)
1949 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1950 name, expand_string_message);
1951
1952 p = op;
1953 if (*p != 0) count++;
1954 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1955 list = store_malloc(count*sizeof(uid_t));
1956 list[ptr++] = (uid_t)(count - 1);
1957
1958 if (data_block == NULL)
1959 *((uid_t **)(ol->value)) = list;
1960 else
1961 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1962
1963 p = op;
1964 while (count-- > 1)
1965 {
1966 int sep = 0;
1967 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1968 if (!route_finduser(big_buffer, NULL, &uid))
1969 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1970 big_buffer);
1971 list[ptr++] = uid;
1972 }
1973 }
1974 break;
1975
1976 /* If it was a gid list, look up each individual entry, and build
1977 a vector of gids, with a count in the first element. Put the vector
1978 in malloc store so we can free the string. (We are reading into permanent
1979 store already.) */
1980
1981 case opt_gidlist:
1982 {
1983 int count = 1;
1984 gid_t *list;
1985 int ptr = 0;
1986 const uschar *p;
1987 const uschar *op = expand_string (sptr);
1988
1989 if (op == NULL)
1990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1991 name, expand_string_message);
1992
1993 p = op;
1994 if (*p != 0) count++;
1995 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1996 list = store_malloc(count*sizeof(gid_t));
1997 list[ptr++] = (gid_t)(count - 1);
1998
1999 if (data_block == NULL)
2000 *((gid_t **)(ol->value)) = list;
2001 else
2002 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2003
2004 p = op;
2005 while (count-- > 1)
2006 {
2007 int sep = 0;
2008 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2009 if (!route_findgroup(big_buffer, &gid))
2010 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2011 big_buffer);
2012 list[ptr++] = gid;
2013 }
2014 }
2015 break;
2016 }
2017
2018 /* Release store if the value of the string doesn't need to be kept. */
2019
2020 if (freesptr) store_reset(reset_point);
2021 break;
2022
2023 /* Expanded boolean: if no characters follow, or if there are no dollar
2024 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2025 save the string for later expansion in the alternate place. */
2026
2027 case opt_expand_bool:
2028 if (*s != 0 && Ustrchr(s, '$') != 0)
2029 {
2030 sprintf(CS name2, "*expand_%.50s", name);
2031 ol2 = find_option(name2, oltop, last);
2032 if (ol2 != NULL)
2033 {
2034 reset_point = sptr = read_string(s, name);
2035 if (data_block == NULL)
2036 *((uschar **)(ol2->value)) = sptr;
2037 else
2038 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2039 freesptr = FALSE;
2040 break;
2041 }
2042 }
2043 /* Fall through */
2044
2045 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2046 look for yes/not/true/false. Some booleans are stored in a single bit in
2047 a single int. There's a special fudge for verify settings; without a suffix
2048 they set both xx_sender and xx_recipient. The table points to the sender
2049 value; search subsequently for the recipient. There's another special case:
2050 opt_bool_set also notes when a boolean has been set. */
2051
2052 case opt_bool:
2053 case opt_bit:
2054 case opt_bool_verify:
2055 case opt_bool_set:
2056 if (*s != 0)
2057 {
2058 s = readconf_readname(name2, 64, s);
2059 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2060 boolvalue = TRUE;
2061 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2062 boolvalue = FALSE;
2063 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2064 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2065 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2066 US"for boolean option ", name);
2067 }
2068
2069 /* Handle single-bit type. */
2070
2071 if (type == opt_bit)
2072 {
2073 int bit = 1 << ((ol->type >> 16) & 31);
2074 int *ptr = (data_block == NULL)?
2075 (int *)(ol->value) :
2076 (int *)(US data_block + (long int)ol->value);
2077 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2078 break;
2079 }
2080
2081 /* Handle full BOOL types */
2082
2083 if (data_block == NULL)
2084 *((BOOL *)(ol->value)) = boolvalue;
2085 else
2086 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2087
2088 /* Verify fudge */
2089
2090 if (type == opt_bool_verify)
2091 {
2092 sprintf(CS name2, "%.50s_recipient", name + offset);
2093 ol2 = find_option(name2, oltop, last);
2094 if (ol2 != NULL)
2095 {
2096 if (data_block == NULL)
2097 *((BOOL *)(ol2->value)) = boolvalue;
2098 else
2099 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2100 }
2101 }
2102
2103 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2104
2105 else if (type == opt_bool_set)
2106 {
2107 sprintf(CS name2, "*set_%.50s", name + offset);
2108 ol2 = find_option(name2, oltop, last);
2109 if (ol2 != NULL)
2110 {
2111 if (data_block == NULL)
2112 *((BOOL *)(ol2->value)) = TRUE;
2113 else
2114 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2115 }
2116 }
2117 break;
2118
2119 /* Octal integer */
2120
2121 case opt_octint:
2122 intbase = 8;
2123 inttype = US"octal ";
2124
2125 /* Integer: a simple(ish) case; allow octal and hex formats, and
2126 suffixes K, M and G. The different types affect output, not input. */
2127
2128 case opt_mkint:
2129 case opt_int:
2130 {
2131 uschar *endptr;
2132 long int lvalue;
2133
2134 errno = 0;
2135 lvalue = strtol(CS s, CSS &endptr, intbase);
2136
2137 if (endptr == s)
2138 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2139 inttype, name);
2140
2141 if (errno != ERANGE && *endptr)
2142 {
2143 uschar * mp = US"GgMmKk\0"; /* YyZzEePpTtGgMmKk */
2144
2145 if ((mp = Ustrchr(mp, *endptr)))
2146 {
2147 endptr++;
2148 do
2149 {
2150 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2151 {
2152 errno = ERANGE;
2153 break;
2154 }
2155 lvalue *= 1024;
2156 }
2157 while (*(mp += 2));
2158 }
2159 }
2160
2161 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2162 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2163 "absolute value of integer \"%s\" is too large (overflow)", s);
2164
2165 while (isspace(*endptr)) endptr++;
2166 if (*endptr)
2167 extra_chars_error(endptr, inttype, US"integer value for ", name);
2168
2169 value = (int)lvalue;
2170 }
2171
2172 if (data_block)
2173 *(int *)(US data_block + (long int)ol->value) = value;
2174 else
2175 *(int *)ol->value = value;
2176 break;
2177
2178 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M,
2179 G and T. */
2180
2181 case opt_Kint:
2182 {
2183 uschar *endptr;
2184 errno = 0;
2185 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2186
2187 if (endptr == s)
2188 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2189 inttype, name);
2190
2191 if (errno != ERANGE && *endptr)
2192 {
2193 uschar * mp = US"EePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2194
2195 if ((mp = Ustrchr(mp, *endptr)))
2196 {
2197 endptr++;
2198 do
2199 {
2200 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2201 {
2202 errno = ERANGE;
2203 break;
2204 }
2205 lvalue *= 1024;
2206 }
2207 while (*(mp += 2));
2208 }
2209 else
2210 lvalue = (lvalue + 512)/1024;
2211 }
2212
2213 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2214 "absolute value of integer \"%s\" is too large (overflow)", s);
2215
2216 while (isspace(*endptr)) endptr++;
2217 if (*endptr != 0)
2218 extra_chars_error(endptr, inttype, US"integer value for ", name);
2219
2220 if (data_block)
2221 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2222 else
2223 *(int_eximarith_t *)ol->value = lvalue;
2224 break;
2225 }
2226
2227 /* Fixed-point number: held to 3 decimal places. */
2228
2229 case opt_fixed:
2230 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2231 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2232 "fixed-point number expected for %s", name);
2233
2234 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2235 "integer \"%s\" is too large (overflow)", s);
2236
2237 value *= 1000;
2238
2239 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2240 "integer \"%s\" is too large (overflow)", s);
2241
2242 /* We get a coverity error here for using count, as it derived
2243 from the tainted buffer pointed to by s, as parsed by sscanf().
2244 By the definition of sscanf we must be accessing between start
2245 and end of s (assuming it is nul-terminated...) so ignore the error. */
2246 /* coverity[tainted_data] */
2247 if (s[count] == '.')
2248 {
2249 int d = 100;
2250 while (isdigit(s[++count]))
2251 {
2252 value += (s[count] - '0') * d;
2253 d /= 10;
2254 }
2255 }
2256
2257 while (isspace(s[count])) count++;
2258
2259 if (s[count] != 0)
2260 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2261
2262 if (data_block == NULL)
2263 *((int *)(ol->value)) = value;
2264 else
2265 *((int *)(US data_block + (long int)(ol->value))) = value;
2266 break;
2267
2268 /* There's a special routine to read time values. */
2269
2270 case opt_time:
2271 value = readconf_readtime(s, 0, FALSE);
2272 if (value < 0)
2273 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2274 name);
2275 if (data_block == NULL)
2276 *((int *)(ol->value)) = value;
2277 else
2278 *((int *)(US data_block + (long int)(ol->value))) = value;
2279 break;
2280
2281 /* A time list is a list of colon-separated times, with the first
2282 element holding the size of the list and the second the number of
2283 entries used. */
2284
2285 case opt_timelist:
2286 {
2287 int count = 0;
2288 int *list = (data_block == NULL)?
2289 (int *)(ol->value) :
2290 (int *)(US data_block + (long int)(ol->value));
2291
2292 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2293 {
2294 int terminator = 0;
2295 uschar *snext = Ustrchr(s, ':');
2296 if (snext != NULL)
2297 {
2298 uschar *ss = snext;
2299 while (ss > s && isspace(ss[-1])) ss--;
2300 terminator = *ss;
2301 }
2302 value = readconf_readtime(s, terminator, FALSE);
2303 if (value < 0)
2304 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2305 name);
2306 if (count > 1 && value <= list[count])
2307 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2308 "time value out of order for %s", name);
2309 list[count+1] = value;
2310 if (snext == NULL) break;
2311 s = snext + 1;
2312 while (isspace(*s)) s++;
2313 }
2314
2315 if (count > list[0] - 2)
2316 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2317 name);
2318 if (count > 0 && list[2] == 0) count = 0;
2319 list[1] = count;
2320 break;
2321 }
2322
2323 case opt_func:
2324 {
2325 void (*fn)() = ol->value;
2326 fn(name, s);
2327 break;
2328 }
2329 }
2330
2331 return TRUE;
2332 }
2333
2334
2335
2336 /*************************************************
2337 * Print a time value *
2338 *************************************************/
2339
2340 /*
2341 Argument: a time value in seconds
2342 Returns: pointer to a fixed buffer containing the time as a string,
2343 in readconf_readtime() format
2344 */
2345
2346 uschar *
2347 readconf_printtime(int t)
2348 {
2349 int s, m, h, d, w;
2350 uschar *p = time_buffer;
2351
2352 if (t < 0)
2353 {
2354 *p++ = '-';
2355 t = -t;
2356 }
2357
2358 s = t % 60;
2359 t /= 60;
2360 m = t % 60;
2361 t /= 60;
2362 h = t % 24;
2363 t /= 24;
2364 d = t % 7;
2365 w = t/7;
2366
2367 if (w > 0) p += sprintf(CS p, "%dw", w);
2368 if (d > 0) p += sprintf(CS p, "%dd", d);
2369 if (h > 0) p += sprintf(CS p, "%dh", h);
2370 if (m > 0) p += sprintf(CS p, "%dm", m);
2371 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2372
2373 return time_buffer;
2374 }
2375
2376
2377
2378 /*************************************************
2379 * Print an individual option value *
2380 *************************************************/
2381
2382 /* This is used by the -bP option, so prints to the standard output.
2383 The entire options list is passed in as an argument, because some options come
2384 in pairs - typically uid/gid settings, which can either be explicit numerical
2385 values, or strings to be expanded later. If the numerical value is unset,
2386 search for "*expand_<name>" to see if there is a string equivalent.
2387
2388 Arguments:
2389 ol option entry, or NULL for an unknown option
2390 name option name
2391 options_block NULL for main configuration options; otherwise points to
2392 a driver block; if the option doesn't have opt_public
2393 set, then options_block->options_block is where the item
2394 resides.
2395 oltop points to the option list in which ol exists
2396 last one more than the offset of the last entry in optop
2397 no_labels do not show "foo = " at the start.
2398
2399 Returns: boolean success
2400 */
2401
2402 static BOOL
2403 print_ol(optionlist *ol, uschar *name, void *options_block,
2404 optionlist *oltop, int last, BOOL no_labels)
2405 {
2406 struct passwd *pw;
2407 struct group *gr;
2408 optionlist *ol2;
2409 void *value;
2410 uid_t *uidlist;
2411 gid_t *gidlist;
2412 uschar *s;
2413 uschar name2[64];
2414
2415 if (!ol)
2416 {
2417 printf("%s is not a known option\n", name);
2418 return FALSE;
2419 }
2420
2421 /* Non-admin callers cannot see options that have been flagged secure by the
2422 "hide" prefix. */
2423
2424 if (!f.admin_user && ol->type & opt_secure)
2425 {
2426 if (no_labels)
2427 printf("%s\n", hidden);
2428 else
2429 printf("%s = %s\n", name, hidden);
2430 return TRUE;
2431 }
2432
2433 /* Else show the value of the option */
2434
2435 value = ol->value;
2436 if (options_block)
2437 {
2438 if (!(ol->type & opt_public))
2439 options_block = (void *)(((driver_instance *)options_block)->options_block);
2440 value = (void *)(US options_block + (long int)value);
2441 }
2442
2443 switch(ol->type & opt_mask)
2444 {
2445 case opt_stringptr:
2446 case opt_rewrite: /* Show the text value */
2447 s = *(USS value);
2448 if (!no_labels) printf("%s = ", name);
2449 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2450 break;
2451
2452 case opt_int:
2453 if (!no_labels) printf("%s = ", name);
2454 printf("%d\n", *((int *)value));
2455 break;
2456
2457 case opt_mkint:
2458 {
2459 int x = *((int *)value);
2460 if (x != 0 && (x & 1023) == 0)
2461 {
2462 int c = 'K';
2463 x >>= 10;
2464 if ((x & 1023) == 0)
2465 {
2466 c = 'M';
2467 x >>= 10;
2468 }
2469 if (!no_labels) printf("%s = ", name);
2470 printf("%d%c\n", x, c);
2471 }
2472 else
2473 {
2474 if (!no_labels) printf("%s = ", name);
2475 printf("%d\n", x);
2476 }
2477 }
2478 break;
2479
2480 case opt_Kint:
2481 {
2482 int_eximarith_t x = *((int_eximarith_t *)value);
2483 if (!no_labels) printf("%s = ", name);
2484 if (x == 0) printf("0\n");
2485 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2486 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2487 else printf(PR_EXIM_ARITH "K\n", x);
2488 }
2489 break;
2490
2491 case opt_octint:
2492 if (!no_labels) printf("%s = ", name);
2493 printf("%#o\n", *((int *)value));
2494 break;
2495
2496 /* Can be negative only when "unset", in which case integer */
2497
2498 case opt_fixed:
2499 {
2500 int x = *((int *)value);
2501 int f = x % 1000;
2502 int d = 100;
2503 if (x < 0) printf("%s =\n", name); else
2504 {
2505 if (!no_labels) printf("%s = ", name);
2506 printf("%d.", x/1000);
2507 do
2508 {
2509 printf("%d", f/d);
2510 f %= d;
2511 d /= 10;
2512 }
2513 while (f != 0);
2514 printf("\n");
2515 }
2516 }
2517 break;
2518
2519 /* If the numerical value is unset, try for the string value */
2520
2521 case opt_expand_uid:
2522 if (! *get_set_flag(name, oltop, last, options_block))
2523 {
2524 sprintf(CS name2, "*expand_%.50s", name);
2525 if ((ol2 = find_option(name2, oltop, last)))
2526 {
2527 void *value2 = ol2->value;
2528 if (options_block)
2529 value2 = (void *)(US options_block + (long int)value2);
2530 s = *(USS value2);
2531 if (!no_labels) printf("%s = ", name);
2532 printf("%s\n", s ? string_printing(s) : US"");
2533 break;
2534 }
2535 }
2536
2537 /* Else fall through */
2538
2539 case opt_uid:
2540 if (!no_labels) printf("%s = ", name);
2541 if (! *get_set_flag(name, oltop, last, options_block))
2542 printf("\n");
2543 else
2544 if ((pw = getpwuid(*((uid_t *)value))))
2545 printf("%s\n", pw->pw_name);
2546 else
2547 printf("%ld\n", (long int)(*((uid_t *)value)));
2548 break;
2549
2550 /* If the numerical value is unset, try for the string value */
2551
2552 case opt_expand_gid:
2553 if (! *get_set_flag(name, oltop, last, options_block))
2554 {
2555 sprintf(CS name2, "*expand_%.50s", name);
2556 if ( (ol2 = find_option(name2, oltop, last))
2557 && (ol2->type & opt_mask) == opt_stringptr)
2558 {
2559 void *value2 = ol2->value;
2560 if (options_block)
2561 value2 = (void *)(US options_block + (long int)value2);
2562 s = *(USS value2);
2563 if (!no_labels) printf("%s = ", name);
2564 printf("%s\n", s ? string_printing(s) : US"");
2565 break;
2566 }
2567 }
2568
2569 /* Else fall through */
2570
2571 case opt_gid:
2572 if (!no_labels) printf("%s = ", name);
2573 if (! *get_set_flag(name, oltop, last, options_block))
2574 printf("\n");
2575 else
2576 if ((gr = getgrgid(*((int *)value))))
2577 printf("%s\n", gr->gr_name);
2578 else
2579 printf("%ld\n", (long int)(*((int *)value)));
2580 break;
2581
2582 case opt_uidlist:
2583 uidlist = *((uid_t **)value);
2584 if (!no_labels) printf("%s =", name);
2585 if (uidlist)
2586 {
2587 uschar sep = no_labels ? '\0' : ' ';
2588 for (int i = 1; i <= (int)(uidlist[0]); i++)
2589 {
2590 uschar *name = NULL;
2591 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2592 if (sep != '\0') printf("%c", sep);
2593 if (name) printf("%s", name);
2594 else printf("%ld", (long int)(uidlist[i]));
2595 sep = ':';
2596 }
2597 }
2598 printf("\n");
2599 break;
2600
2601 case opt_gidlist:
2602 gidlist = *((gid_t **)value);
2603 if (!no_labels) printf("%s =", name);
2604 if (gidlist)
2605 {
2606 uschar sep = no_labels ? '\0' : ' ';
2607 for (int i = 1; i <= (int)(gidlist[0]); i++)
2608 {
2609 uschar *name = NULL;
2610 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2611 if (sep != '\0') printf("%c", sep);
2612 if (name) printf("%s", name);
2613 else printf("%ld", (long int)(gidlist[i]));
2614 sep = ':';
2615 }
2616 }
2617 printf("\n");
2618 break;
2619
2620 case opt_time:
2621 if (!no_labels) printf("%s = ", name);
2622 printf("%s\n", readconf_printtime(*((int *)value)));
2623 break;
2624
2625 case opt_timelist:
2626 {
2627 int *list = (int *)value;
2628 if (!no_labels) printf("%s = ", name);
2629 for (int i = 0; i < list[1]; i++)
2630 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2631 printf("\n");
2632 }
2633 break;
2634
2635 case opt_bit:
2636 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2637 "" : "no_", name);
2638 break;
2639
2640 case opt_expand_bool:
2641 sprintf(CS name2, "*expand_%.50s", name);
2642 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2643 {
2644 void *value2 = ol2->value;
2645 if (options_block)
2646 value2 = (void *)(US options_block + (long int)value2);
2647 s = *(USS value2);
2648 if (s)
2649 {
2650 if (!no_labels) printf("%s = ", name);
2651 printf("%s\n", string_printing(s));
2652 break;
2653 }
2654 /* s == NULL => string not set; fall through */
2655 }
2656
2657 /* Fall through */
2658
2659 case opt_bool:
2660 case opt_bool_verify:
2661 case opt_bool_set:
2662 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2663 break;
2664 }
2665 return TRUE;
2666 }
2667
2668
2669
2670 /*************************************************
2671 * Print value from main configuration *
2672 *************************************************/
2673
2674 /* This function, called as a result of encountering the -bP option,
2675 causes the value of any main configuration variable to be output if the
2676 second argument is NULL. There are some special values:
2677
2678 all print all main configuration options
2679 config_file print the name of the configuration file
2680 (configure_file will still work, for backward
2681 compatibility)
2682 routers print the routers' configurations
2683 transports print the transports' configuration
2684 authenticators print the authenticators' configuration
2685 macros print the macros' configuration
2686 router_list print a list of router names
2687 transport_list print a list of transport names
2688 authenticator_list print a list of authentication mechanism names
2689 macro_list print a list of macro names
2690 +name print a named list item
2691 local_scan print the local_scan options
2692 config print the configuration as it is parsed
2693 environment print the used execution environment
2694
2695 If the second argument is not NULL, it must be one of "router", "transport",
2696 "authenticator" or "macro" in which case the first argument identifies the
2697 driver whose options are to be printed.
2698
2699 Arguments:
2700 name option name if type == NULL; else driver name
2701 type NULL or driver type name, as described above
2702 no_labels avoid the "foo = " at the start of an item
2703
2704 Returns: Boolean success
2705 */
2706
2707 BOOL
2708 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2709 {
2710 BOOL names_only = FALSE;
2711 optionlist *ol2 = NULL;
2712 driver_instance *d = NULL;
2713 int size = 0;
2714
2715 if (!type)
2716 {
2717 if (*name == '+')
2718 {
2719 tree_node *t;
2720 BOOL found = FALSE;
2721 static uschar *types[] = { US"address", US"domain", US"host",
2722 US"localpart" };
2723 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2724 &hostlist_anchor, &localpartlist_anchor };
2725
2726 for (int i = 0; i < 4; i++)
2727 if ((t = tree_search(*(anchors[i]), name+1)))
2728 {
2729 found = TRUE;
2730 if (no_labels)
2731 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2732 else
2733 printf("%slist %s = %s\n", types[i], name+1,
2734 ((namedlist_block *)(t->data.ptr))->string);
2735 }
2736
2737 if (!found)
2738 printf("no address, domain, host, or local part list called \"%s\" "
2739 "exists\n", name+1);
2740
2741 return found;
2742 }
2743
2744 if ( Ustrcmp(name, "configure_file") == 0
2745 || Ustrcmp(name, "config_file") == 0)
2746 {
2747 printf("%s\n", CS config_main_filename);
2748 return TRUE;
2749 }
2750
2751 if (Ustrcmp(name, "all") == 0)
2752 {
2753 for (optionlist * ol = optionlist_config;
2754 ol < optionlist_config + nelem(optionlist_config); ol++)
2755 if (!(ol->type & opt_hidden))
2756 (void) print_ol(ol, US ol->name, NULL,
2757 optionlist_config, nelem(optionlist_config),
2758 no_labels);
2759 return TRUE;
2760 }
2761
2762 if (Ustrcmp(name, "local_scan") == 0)
2763 {
2764 #ifndef LOCAL_SCAN_HAS_OPTIONS
2765 printf("local_scan() options are not supported\n");
2766 return FALSE;
2767 #else
2768 for (optionlist * ol = local_scan_options;
2769 ol < local_scan_options + local_scan_options_count; ol++)
2770 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2771 local_scan_options_count, no_labels);
2772 return TRUE;
2773 #endif
2774 }
2775
2776 if (Ustrcmp(name, "config") == 0)
2777 {
2778 print_config(f.admin_user, no_labels);
2779 return TRUE;
2780 }
2781
2782 if (Ustrcmp(name, "routers") == 0)
2783 {
2784 type = US"router";
2785 name = NULL;
2786 }
2787 else if (Ustrcmp(name, "transports") == 0)
2788 {
2789 type = US"transport";
2790 name = NULL;
2791 }
2792 else if (Ustrcmp(name, "authenticators") == 0)
2793 {
2794 type = US"authenticator";
2795 name = NULL;
2796 }
2797 else if (Ustrcmp(name, "macros") == 0)
2798 {
2799 type = US"macro";
2800 name = NULL;
2801 }
2802 else if (Ustrcmp(name, "router_list") == 0)
2803 {
2804 type = US"router";
2805 name = NULL;
2806 names_only = TRUE;
2807 }
2808 else if (Ustrcmp(name, "transport_list") == 0)
2809 {
2810 type = US"transport";
2811 name = NULL;
2812 names_only = TRUE;
2813 }
2814 else if (Ustrcmp(name, "authenticator_list") == 0)
2815 {
2816 type = US"authenticator";
2817 name = NULL;
2818 names_only = TRUE;
2819 }
2820 else if (Ustrcmp(name, "macro_list") == 0)
2821 {
2822 type = US"macro";
2823 name = NULL;
2824 names_only = TRUE;
2825 }
2826 else if (Ustrcmp(name, "environment") == 0)
2827 {
2828 if (environ)
2829 {
2830 uschar ** p;
2831 for (p = USS environ; *p; p++) ;
2832 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2833
2834 for (p = USS environ; *p; p++)
2835 {
2836 uschar * q;
2837 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2838 puts(CS *p);
2839 }
2840 }
2841 return TRUE;
2842 }
2843
2844 else
2845 return print_ol(find_option(name,
2846 optionlist_config, nelem(optionlist_config)),
2847 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2848 }
2849
2850 /* Handle the options for a router or transport. Skip options that are flagged
2851 as hidden. Some of these are options with names starting with '*', used for
2852 internal alternative representations of other options (which the printing
2853 function will sort out). Others are synonyms kept for backward compatibility.
2854 */
2855
2856 if (Ustrcmp(type, "router") == 0)
2857 {
2858 d = (driver_instance *)routers;
2859 ol2 = optionlist_routers;
2860 size = optionlist_routers_size;
2861 }
2862 else if (Ustrcmp(type, "transport") == 0)
2863 {
2864 d = (driver_instance *)transports;
2865 ol2 = optionlist_transports;
2866 size = optionlist_transports_size;
2867 }
2868 else if (Ustrcmp(type, "authenticator") == 0)
2869 {
2870 d = (driver_instance *)auths;
2871 ol2 = optionlist_auths;
2872 size = optionlist_auths_size;
2873 }
2874
2875 else if (Ustrcmp(type, "macro") == 0)
2876 {
2877 /* People store passwords in macros and they were previously not available
2878 for printing. So we have an admin_users restriction. */
2879 if (!f.admin_user)
2880 {
2881 fprintf(stderr, "exim: permission denied\n");
2882 return FALSE;
2883 }
2884 for (macro_item * m = macros; m; m = m->next)
2885 if (!name || Ustrcmp(name, m->name) == 0)
2886 {
2887 if (names_only)
2888 printf("%s\n", CS m->name);
2889 else if (no_labels)
2890 printf("%s\n", CS m->replacement);
2891 else
2892 printf("%s=%s\n", CS m->name, CS m->replacement);
2893 if (name)
2894 return TRUE;
2895 }
2896 if (!name) return TRUE;
2897
2898 printf("%s %s not found\n", type, name);
2899 return FALSE;
2900 }
2901
2902 if (names_only)
2903 {
2904 for (; d; d = d->next) printf("%s\n", CS d->name);
2905 return TRUE;
2906 }
2907
2908 /* Either search for a given driver, or print all of them */
2909
2910 for (; d; d = d->next)
2911 {
2912 BOOL rc = FALSE;
2913 if (!name)
2914 printf("\n%s %s:\n", d->name, type);
2915 else if (Ustrcmp(d->name, name) != 0) continue;
2916
2917 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2918 if (!(ol->type & opt_hidden))
2919 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2920
2921 for (optionlist * ol = d->info->options;
2922 ol < d->info->options + *(d->info->options_count); ol++)
2923 if (!(ol->type & opt_hidden))
2924 rc |= print_ol(ol, US ol->name, d, d->info->options,
2925 *d->info->options_count, no_labels);
2926
2927 if (name) return rc;
2928 }
2929 if (!name) return TRUE;
2930
2931 printf("%s %s not found\n", type, name);
2932 return FALSE;
2933 }
2934
2935
2936
2937 /*************************************************
2938 * Read a named list item *
2939 *************************************************/
2940
2941 /* This function reads a name and a list (i.e. string). The name is used to
2942 save the list in a tree, sorted by its name. Each entry also has a number,
2943 which can be used for caching tests, but if the string contains any expansion
2944 items other than $key, the number is set negative to inhibit caching. This
2945 mechanism is used for domain, host, and address lists that are referenced by
2946 the "+name" syntax.
2947
2948 Arguments:
2949 anchorp points to the tree anchor
2950 numberp points to the current number for this tree
2951 max the maximum number permitted
2952 s the text of the option line, starting immediately after the name
2953 of the list type
2954 tname the name of the list type, for messages
2955
2956 Returns: nothing
2957 */
2958
2959 static void
2960 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2961 uschar *tname)
2962 {
2963 BOOL forcecache = FALSE;
2964 uschar *ss;
2965 tree_node *t;
2966 namedlist_block *nb = store_get(sizeof(namedlist_block));
2967
2968 if (Ustrncmp(s, "_cache", 6) == 0)
2969 {
2970 forcecache = TRUE;
2971 s += 6;
2972 }
2973
2974 if (!isspace(*s))
2975 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2976
2977 if (*numberp >= max)
2978 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2979 tname, max);
2980
2981 while (isspace(*s)) s++;
2982 ss = s;
2983 while (isalnum(*s) || *s == '_') s++;
2984 t = store_get(sizeof(tree_node) + s-ss);
2985 Ustrncpy(t->name, ss, s-ss);
2986 t->name[s-ss] = 0;
2987 while (isspace(*s)) s++;
2988
2989 if (!tree_insertnode(anchorp, t))
2990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2991 "duplicate name \"%s\" for a named %s", t->name, tname);
2992
2993 t->data.ptr = nb;
2994 nb->number = *numberp;
2995 *numberp += 1;
2996
2997 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2998 "missing '=' after \"%s\"", t->name);
2999 while (isspace(*s)) s++;
3000 nb->string = read_string(s, t->name);
3001 nb->cache_data = NULL;
3002
3003 /* Check the string for any expansions; if any are found, mark this list
3004 uncacheable unless the user has explicited forced caching. */
3005
3006 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3007 }
3008
3009
3010
3011
3012 /*************************************************
3013 * Unpick data for a rate limit *
3014 *************************************************/
3015
3016 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3017 separate values.
3018
3019 Arguments:
3020 s string, in the form t,b,f,l
3021 where t is the threshold (integer)
3022 b is the initial delay (time)
3023 f is the multiplicative factor (fixed point)
3024 k is the maximum time (time)
3025 threshold where to store threshold
3026 base where to store base in milliseconds
3027 factor where to store factor in milliseconds
3028 limit where to store limit
3029
3030 Returns: nothing (panics on error)
3031 */
3032
3033 static void
3034 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3035 int *limit)
3036 {
3037 uschar bstring[16], lstring[16];
3038
3039 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3040 factor, lstring) == 4)
3041 {
3042 *base = readconf_readtime(bstring, 0, TRUE);
3043 *limit = readconf_readtime(lstring, 0, TRUE);
3044 if (*base >= 0 && *limit >= 0) return;
3045 }
3046 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3047 }
3048
3049
3050
3051
3052 /*************************************************
3053 * Drop privs for checking TLS config *
3054 *************************************************/
3055
3056 /* We want to validate TLS options during readconf, but do not want to be
3057 root when we call into the TLS library, in case of library linkage errors
3058 which cause segfaults; before this check, those were always done as the Exim
3059 runtime user and it makes sense to continue with that.
3060
3061 Assumes: tls_require_ciphers has been set, if it will be
3062 exim_user has been set, if it will be
3063 exim_group has been set, if it will be
3064
3065 Returns: bool for "okay"; false will cause caller to immediately exit.
3066 */
3067
3068 #ifdef SUPPORT_TLS
3069 static BOOL
3070 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3071 {
3072 const uschar *errmsg;
3073 pid_t pid;
3074 int rc, status;
3075 void (*oldsignal)(int);
3076
3077 /* If TLS will never be used, no point checking ciphers */
3078
3079 if ( !tls_advertise_hosts
3080 || !*tls_advertise_hosts
3081 || Ustrcmp(tls_advertise_hosts, ":") == 0
3082 )
3083 return TRUE;
3084 else if (!nowarn && !tls_certificate)
3085 log_write(0, LOG_MAIN,
3086 "Warning: No server certificate defined; will use a selfsigned one.\n"
3087 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3088
3089 oldsignal = signal(SIGCHLD, SIG_DFL);
3090
3091 fflush(NULL);
3092 if ((pid = fork()) < 0)
3093 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3094
3095 if (pid == 0)
3096 {
3097 /* in some modes, will have dropped privilege already */
3098 if (!geteuid())
3099 exim_setugid(exim_uid, exim_gid, FALSE,
3100 US"calling tls_validate_require_cipher");
3101
3102 if ((errmsg = tls_validate_require_cipher()))
3103 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3104 "tls_require_ciphers invalid: %s", errmsg);
3105 fflush(NULL);
3106 _exit(0);
3107 }
3108
3109 do {
3110 rc = waitpid(pid, &status, 0);
3111 } while (rc < 0 && errno == EINTR);
3112
3113 DEBUG(D_tls)
3114 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3115 (int)pid, status);
3116
3117 signal(SIGCHLD, oldsignal);
3118
3119 return status == 0;
3120 }
3121 #endif /* SUPPORT_TLS */
3122
3123
3124
3125
3126 /*************************************************
3127 * Read main configuration options *
3128 *************************************************/
3129
3130 /* This function is the first to be called for configuration reading. It
3131 opens the configuration file and reads general configuration settings until
3132 it reaches the end of the configuration section. The file is then left open so
3133 that the remaining configuration data can subsequently be read if needed for
3134 this run of Exim.
3135
3136 The configuration file must be owned either by root or exim, and be writeable
3137 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3138 in the config file, so the test is done on the compiled in values. A slight
3139 anomaly, to be carefully documented.
3140
3141 The name of the configuration file is taken from a list that is included in the
3142 binary of Exim. It can be altered from the command line, but if that is done,
3143 root privilege is immediately withdrawn unless the caller is root or exim.
3144 The first file on the list that exists is used.
3145
3146 For use on multiple systems that share file systems, first look for a
3147 configuration file whose name has the current node name on the end. If that is
3148 not found, try the generic name. For really contorted configurations, that run
3149 multiple Exims with different uid settings, first try adding the effective uid
3150 before the node name. These complications are going to waste resources on most
3151 systems. Therefore they are available only when requested by compile-time
3152 options. */
3153
3154 void
3155 readconf_main(BOOL nowarn)
3156 {
3157 int sep = 0;
3158 struct stat statbuf;
3159 uschar *s, *filename;
3160 const uschar *list = config_main_filelist;
3161
3162 /* Loop through the possible file names */
3163
3164 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3165 {
3166
3167 /* Cut out all the fancy processing unless specifically wanted */
3168
3169 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3170 uschar *suffix = filename + Ustrlen(filename);
3171
3172 /* Try for the node-specific file if a node name exists */
3173
3174 #ifdef CONFIGURE_FILE_USE_NODE
3175 struct utsname uts;
3176 if (uname(&uts) >= 0)
3177 {
3178 #ifdef CONFIGURE_FILE_USE_EUID
3179 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3180 config_file = Ufopen(filename, "rb");
3181 if (config_file == NULL)
3182 #endif /* CONFIGURE_FILE_USE_EUID */
3183 {
3184 sprintf(CS suffix, ".%.256s", uts.nodename);
3185 config_file = Ufopen(filename, "rb");
3186 }
3187 }
3188 #endif /* CONFIGURE_FILE_USE_NODE */
3189
3190 /* Otherwise, try the generic name, possibly with the euid added */
3191
3192 #ifdef CONFIGURE_FILE_USE_EUID
3193 if (config_file == NULL)
3194 {
3195 sprintf(CS suffix, ".%ld", (long int)original_euid);
3196 config_file = Ufopen(filename, "rb");
3197 }
3198 #endif /* CONFIGURE_FILE_USE_EUID */
3199
3200 /* Finally, try the unadorned name */
3201
3202 if (config_file == NULL)
3203 {
3204 *suffix = 0;
3205 config_file = Ufopen(filename, "rb");
3206 }
3207 #else /* if neither defined */
3208
3209 /* This is the common case when the fancy processing is not included. */
3210
3211 config_file = Ufopen(filename, "rb");
3212 #endif
3213
3214 /* If the file does not exist, continue to try any others. For any other
3215 error, break out (and die). */
3216
3217 if (config_file != NULL || errno != ENOENT) break;
3218 }
3219
3220 /* On success, save the name for verification; config_filename is used when
3221 logging configuration errors (it changes for .included files) whereas
3222 config_main_filename is the name shown by -bP. Failure to open a configuration
3223 file is a serious disaster. */
3224
3225 if (config_file)
3226 {
3227 uschar *last_slash = Ustrrchr(filename, '/');
3228 config_filename = config_main_filename = string_copy(filename);
3229
3230 /* The config_main_directory we need for the $config_dir expansion.
3231 config_main_filename we need for $config_file expansion.
3232 And config_dir is the directory of the current configuration, used for
3233 relative .includes. We do need to know it's name, as we change our working
3234 directory later. */
3235
3236 if (filename[0] == '/')
3237 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3238 else
3239 {
3240 /* relative configuration file name: working dir + / + basename(filename) */
3241
3242 uschar buf[PATH_MAX];
3243 gstring * g;
3244
3245 if (os_getcwd(buf, PATH_MAX) == NULL)
3246 {
3247 perror("exim: getcwd");
3248 exit(EXIT_FAILURE);
3249 }
3250 g = string_cat(NULL, buf);
3251
3252 /* If the dir does not end with a "/", append one */
3253 if (g->s[g->ptr-1] != '/')
3254 g = string_catn(g, US"/", 1);
3255
3256 /* If the config file contains a "/", extract the directory part */
3257 if (last_slash)
3258 g = string_catn(g, filename, last_slash - filename);
3259
3260 config_main_directory = string_from_gstring(g);
3261 }
3262 config_directory = config_main_directory;
3263 }
3264 else
3265 {
3266 if (filename == NULL)
3267 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3268 "%s", config_main_filelist);
3269 else
3270 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3271 "configuration file %s", filename));
3272 }
3273
3274 /* Now, once we found and opened our configuration file, we change the directory
3275 to a safe place. Later we change to $spool_directory. */
3276
3277 if (Uchdir("/") < 0)
3278 {
3279 perror("exim: chdir `/': ");
3280 exit(EXIT_FAILURE);
3281 }
3282
3283 /* Check the status of the file we have opened, if we have retained root
3284 privileges and the file isn't /dev/null (which *should* be 0666). */
3285
3286 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3287 {
3288 if (fstat(fileno(config_file), &statbuf) != 0)
3289 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3290 big_buffer);
3291
3292 if ((statbuf.st_uid != root_uid /* owner not root */
3293 #ifdef CONFIGURE_OWNER
3294 && statbuf.st_uid != config_uid /* owner not the special one */
3295 #endif
3296 ) || /* or */
3297 (statbuf.st_gid != root_gid /* group not root & */
3298 #ifdef CONFIGURE_GROUP
3299 && statbuf.st_gid != config_gid /* group not the special one */
3300 #endif
3301 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3302 /* or */
3303 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3304
3305 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3306 "wrong owner, group, or mode", big_buffer);
3307 }
3308
3309 /* Process the main configuration settings. They all begin with a lower case
3310 letter. If we see something starting with an upper case letter, it is taken as
3311 a macro definition. */
3312
3313 while ((s = get_config_line()))
3314 {
3315 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3316 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3317 "found unexpected BOM (Byte Order Mark)");
3318
3319 if (isupper(s[0]))
3320 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3321
3322 else if (Ustrncmp(s, "domainlist", 10) == 0)
3323 read_named_list(&domainlist_anchor, &domainlist_count,
3324 MAX_NAMED_LIST, s+10, US"domain list");
3325
3326 else if (Ustrncmp(s, "hostlist", 8) == 0)
3327 read_named_list(&hostlist_anchor, &hostlist_count,
3328 MAX_NAMED_LIST, s+8, US"host list");
3329
3330 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3331 read_named_list(&addresslist_anchor, &addresslist_count,
3332 MAX_NAMED_LIST, s+11, US"address list");
3333
3334 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3335 read_named_list(&localpartlist_anchor, &localpartlist_count,
3336 MAX_NAMED_LIST, s+13, US"local part list");
3337
3338 else
3339 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3340 NULL, US"main option \"%s\" unknown");
3341 }
3342
3343
3344 /* If local_sender_retain is set, local_from_check must be unset. */
3345
3346 if (local_sender_retain && local_from_check)
3347 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3348 "local_sender_retain are set; this combination is not allowed");
3349
3350 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3351 wanted. */
3352
3353 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3354
3355 /* The max retry interval must not be greater than 24 hours. */
3356
3357 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3358
3359 /* remote_max_parallel must be > 0 */
3360
3361 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3362
3363 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3364 start of a new SMTP message. */
3365
3366 freeze_tell_config = freeze_tell;
3367
3368 /* The primary host name may be required for expansion of spool_directory
3369 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3370 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3371 canonize it. Some people like upper case letters in their host names, so we
3372 don't force the case. */
3373
3374 if (primary_hostname == NULL)
3375 {
3376 const uschar *hostname;
3377 struct utsname uts;
3378 if (uname(&uts) < 0)
3379 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3380 hostname = US uts.nodename;
3381
3382 if (Ustrchr(hostname, '.') == NULL)
3383 {
3384 int af = AF_INET;
3385 struct hostent *hostdata;
3386
3387 #if HAVE_IPV6
3388 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3389 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3390 MCL_DOMAIN, TRUE, NULL) != OK))
3391 af = AF_INET6;
3392 #else
3393 af = AF_INET;
3394 #endif
3395
3396 for (;;)
3397 {
3398 #if HAVE_IPV6
3399 #if HAVE_GETIPNODEBYNAME
3400 int error_num;
3401 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3402 #else
3403 hostdata = gethostbyname2(CS hostname, af);
3404 #endif
3405 #else
3406 hostdata = gethostbyname(CS hostname);
3407 #endif
3408
3409 if (hostdata != NULL)
3410 {
3411 hostname = US hostdata->h_name;
3412 break;
3413 }
3414
3415 if (af == AF_INET) break;
3416 af = AF_INET;
3417 }
3418 }
3419
3420 primary_hostname = string_copy(hostname);
3421 }
3422
3423 /* Set up default value for smtp_active_hostname */
3424
3425 smtp_active_hostname = primary_hostname;
3426
3427 /* If spool_directory wasn't set in the build-time configuration, it must have
3428 got set above. Of course, writing to the log may not work if log_file_path is
3429 not set, but it will at least get to syslog or somewhere, with any luck. */
3430
3431 if (*spool_directory == 0)
3432 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3433 "proceed");
3434
3435 /* Expand the spool directory name; it may, for example, contain the primary
3436 host name. Same comment about failure. */
3437
3438 s = expand_string(spool_directory);
3439 if (s == NULL)
3440 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3441 "\"%s\": %s", spool_directory, expand_string_message);
3442 spool_directory = s;
3443
3444 /* Expand log_file_path, which must contain "%s" in any component that isn't
3445 the null string or "syslog". It is also allowed to contain one instance of %D
3446 or %M. However, it must NOT contain % followed by anything else. */
3447
3448 if (*log_file_path != 0)
3449 {
3450 const uschar *ss, *sss;
3451 int sep = ':'; /* Fixed for log file path */
3452 s = expand_string(log_file_path);
3453 if (s == NULL)
3454 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3455 "\"%s\": %s", log_file_path, expand_string_message);
3456
3457 ss = s;
3458 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3459 {
3460 uschar *t;
3461 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3462 t = Ustrstr(sss, "%s");
3463 if (t == NULL)
3464 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3465 "contain \"%%s\"", sss);
3466 *t = 'X';
3467 t = Ustrchr(sss, '%');
3468 if (t != NULL)
3469 {
3470 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3471 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3472 "unexpected \"%%\" character", s);
3473 }
3474 }
3475
3476 log_file_path = s;
3477 }
3478
3479 /* Interpret syslog_facility into an integer argument for 'ident' param to
3480 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3481 leading "log_". */
3482
3483 if (syslog_facility_str)
3484 {
3485 int i;
3486 uschar *s = syslog_facility_str;
3487
3488 if ((Ustrlen(syslog_facility_str) >= 4) &&
3489 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3490 s += 4;
3491
3492 for (i = 0; i < syslog_list_size; i++)
3493 if (strcmpic(s, syslog_list[i].name) == 0)
3494 {
3495 syslog_facility = syslog_list[i].value;
3496 break;
3497 }
3498
3499 if (i >= syslog_list_size)
3500 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3501 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3502 }
3503
3504 /* Expand pid_file_path */
3505
3506 if (*pid_file_path != 0)
3507 {
3508 if (!(s = expand_string(pid_file_path)))
3509 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3510 "\"%s\": %s", pid_file_path, expand_string_message);
3511 pid_file_path = s;
3512 }
3513
3514 /* Set default value of process_log_path */
3515
3516 if (!process_log_path || *process_log_path =='\0')
3517 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3518
3519 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3520 message. */
3521
3522 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3523
3524 /* Unpick the SMTP rate limiting options, if set */
3525
3526 if (smtp_ratelimit_mail)
3527 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3528 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3529
3530 if (smtp_ratelimit_rcpt)
3531 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3532 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3533
3534 /* The qualify domains default to the primary host name */
3535
3536 if (!qualify_domain_sender)
3537 qualify_domain_sender = primary_hostname;
3538 if (!qualify_domain_recipient)
3539 qualify_domain_recipient = qualify_domain_sender;
3540
3541 /* Setting system_filter_user in the configuration sets the gid as well if a
3542 name is given, but a numerical value does not. */
3543
3544 if (system_filter_uid_set && !system_filter_gid_set)
3545 {
3546 struct passwd *pw = getpwuid(system_filter_uid);
3547 if (!pw)
3548 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3549 (long int)system_filter_uid);
3550 system_filter_gid = pw->pw_gid;
3551 system_filter_gid_set = TRUE;
3552 }
3553
3554 /* If the errors_reply_to field is set, check that it is syntactically valid
3555 and ensure it contains a domain. */
3556
3557 if (errors_reply_to)
3558 {
3559 uschar *errmess;
3560 int start, end, domain;
3561 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3562 &start, &end, &domain, FALSE);
3563
3564 if (!recipient)
3565 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3566 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3567
3568 if (domain == 0)
3569 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3570 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3571 }
3572
3573 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3574 smtp_accept_max must also be set. */
3575
3576 if (smtp_accept_max == 0 &&
3577 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3578 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3579 "smtp_accept_max must be set if smtp_accept_queue or "
3580 "smtp_accept_max_per_host is set");
3581
3582 /* Set up the host number if anything is specified. It is an expanded string
3583 so that it can be computed from the host name, for example. We do this last
3584 so as to ensure that everything else is set up before the expansion. */
3585
3586 if (host_number_string)
3587 {
3588 long int n;
3589 uschar *end;
3590 uschar *s = expand_string(host_number_string);
3591
3592 if (!s)
3593 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3594 "failed to expand localhost_number \"%s\": %s",
3595 host_number_string, expand_string_message);
3596 n = Ustrtol(s, &end, 0);
3597 while (isspace(*end)) end++;
3598 if (*end != 0)
3599 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3600 "localhost_number value is not a number: %s", s);
3601 if (n > LOCALHOST_MAX)
3602 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3603 "localhost_number is greater than the maximum allowed value (%d)",
3604 LOCALHOST_MAX);
3605 host_number = n;
3606 }
3607
3608 #ifdef SUPPORT_TLS
3609 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3610
3611 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3613 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3614 tls_verify_hosts ? "" : "try_");
3615
3616 /* This also checks that the library linkage is working and we can call
3617 routines in it, so call even if tls_require_ciphers is unset */
3618 if (!tls_dropprivs_validate_require_cipher(nowarn))
3619 exit(1);
3620
3621 /* Magic number: at time of writing, 1024 has been the long-standing value
3622 used by so many clients, and what Exim used to use always, that it makes
3623 sense to just min-clamp this max-clamp at that. */
3624 if (tls_dh_max_bits < 1024)
3625 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3626 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3627
3628 /* If openssl_options is set, validate it */
3629 if (openssl_options)
3630 {
3631 # ifdef USE_GNUTLS
3632 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3633 "openssl_options is set but we're using GnuTLS");
3634 # else
3635 long dummy;
3636 if (!tls_openssl_options_parse(openssl_options, &dummy))
3637 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3638 "openssl_options parse error: %s", openssl_options);
3639 # endif
3640 }
3641 #endif /*SUPPORT_TLS*/
3642
3643 if (!nowarn && !keep_environment && environ && *environ)
3644 log_write(0, LOG_MAIN,
3645 "Warning: purging the environment.\n"
3646 " Suggested action: use keep_environment.");
3647 }
3648
3649
3650
3651 /*************************************************
3652 * Initialize one driver *
3653 *************************************************/
3654
3655 /* This is called once the driver's generic options, if any, have been read.
3656 We can now find the driver, set up defaults for the private options, and
3657 unset any "set" bits in the private options table (which might have been
3658 set by another incarnation of the same driver).
3659
3660 Arguments:
3661 d pointer to driver instance block, with generic
3662 options filled in
3663 drivers_available vector of available drivers
3664 size_of_info size of each block in drivers_available
3665 class class of driver, for error message
3666
3667 Returns: pointer to the driver info block
3668 */
3669
3670 static driver_info *
3671 init_driver(driver_instance *d, driver_info *drivers_available,
3672 int size_of_info, uschar *class)
3673 {
3674 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3675 dd = (driver_info *)((US dd) + size_of_info))
3676 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3677 {
3678 int len = dd->options_len;
3679 d->info = dd;
3680 d->options_block = store_get(len);
3681 memcpy(d->options_block, dd->options_block, len);
3682 for (int i = 0; i < *(dd->options_count); i++)
3683 dd->options[i].type &= ~opt_set;
3684 return dd;
3685 }
3686
3687 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3688 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3689
3690 return NULL; /* never obeyed */
3691 }
3692
3693
3694
3695
3696 /*************************************************
3697 * Initialize driver list *
3698 *************************************************/
3699
3700 /* This function is called for routers, transports, and authentication
3701 mechanisms. It reads the data from the current point in the configuration file
3702 up to the end of the section, and sets up a chain of instance blocks according
3703 to the file's contents. The file will already have been opened by a call to
3704 readconf_main, and must be left open for subsequent reading of further data.
3705
3706 Any errors cause a panic crash. Note that the blocks with names driver_info and
3707 driver_instance must map the first portions of all the _info and _instance
3708 blocks for this shared code to work.
3709
3710 Arguments:
3711 class "router", "transport", or "authenticator"
3712 anchor &routers, &transports, &auths
3713 drivers_available available drivers
3714 size_of_info size of each info block
3715 instance_default points to default data for an instance
3716 instance_size size of instance block
3717 driver_optionlist generic option list
3718 driver_optionlist_count count of generic option list
3719
3720 Returns: nothing
3721 */
3722
3723 void
3724 readconf_driver_init(
3725 uschar *class,
3726 driver_instance **anchor,
3727 driver_info *drivers_available,
3728 int size_of_info,
3729 void *instance_default,
3730 int instance_size,
3731 optionlist *driver_optionlist,
3732 int driver_optionlist_count)
3733 {
3734 driver_instance **p = anchor;
3735 driver_instance *d = NULL;
3736 uschar *buffer;
3737
3738 while ((buffer = get_config_line()) != NULL)
3739 {
3740 uschar name[64];
3741 uschar *s;
3742
3743 /* Read the first name on the line and test for the start of a new driver. A
3744 macro definition indicates the end of the previous driver. If this isn't the
3745 start of a new driver, the line will be re-read. */
3746
3747 s = readconf_readname(name, sizeof(name), buffer);
3748
3749 /* Handle macro definition, first finishing off the initialization of the
3750 previous driver, if any. */
3751
3752 if (isupper(*name) && *s == '=')
3753 {
3754 if (d)
3755 {
3756 if (!d->driver_name)
3757 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3758 "no driver defined for %s \"%s\"", class, d->name);
3759 (d->info->init)(d);
3760 d = NULL;
3761 }
3762 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3763 continue;
3764 }
3765
3766 /* If the line starts with a name terminated by a colon, we are at the
3767 start of the definition of a new driver. The rest of the line must be
3768 blank. */
3769
3770 if (*s++ == ':')
3771 {
3772 /* Finish off initializing the previous driver. */
3773
3774 if (d)
3775 {
3776 if (!d->driver_name)
3777 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3778 "no driver defined for %s \"%s\"", class, d->name);
3779 (d->info->init)(d);
3780 }
3781
3782 /* Check that we haven't already got a driver of this name */
3783
3784 for (d = *anchor; d; d = d->next)
3785 if (Ustrcmp(name, d->name) == 0)
3786 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3787 "there are two %ss called \"%s\"", class, name);
3788
3789 /* Set up a new driver instance data block on the chain, with
3790 its default values installed. */
3791
3792 d = store_get(instance_size);
3793 memcpy(d, instance_default, instance_size);
3794 *p = d;
3795 p = &d->next;
3796 d->name = string_copy(name);
3797
3798 /* Clear out the "set" bits in the generic options */
3799
3800 for (int i = 0; i < driver_optionlist_count; i++)
3801 driver_optionlist[i].type &= ~opt_set;
3802
3803 /* Check nothing more on this line, then do the next loop iteration. */
3804
3805 while (isspace(*s)) s++;
3806 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3807 continue;
3808 }
3809
3810 /* Not the start of a new driver. Give an error if we have not set up a
3811 current driver yet. */
3812
3813 if (!d)
3814 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3815
3816 /* First look to see if this is a generic option; if it is "driver",
3817 initialize the driver. If is it not a generic option, we can look for a
3818 private option provided that the driver has been previously set up. */
3819
3820 if (readconf_handle_option(buffer, driver_optionlist,
3821 driver_optionlist_count, d, NULL))
3822 {
3823 if (!d->info && d->driver_name)
3824 init_driver(d, drivers_available, size_of_info, class);
3825 }
3826
3827 /* Handle private options - pass the generic block because some may
3828 live therein. A flag with each option indicates if it is in the public
3829 block. */
3830
3831 else if (d->info)
3832 readconf_handle_option(buffer, d->info->options,
3833 *(d->info->options_count), d, US"option \"%s\" unknown");
3834
3835 /* The option is not generic and the driver name has not yet been given. */
3836
3837 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3838 "(\"driver\" must be specified before any private options)", name);
3839 }
3840
3841 /* Run the initialization function for the final driver. */
3842
3843 if (d)
3844 {
3845 if (!d->driver_name)
3846 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3847 "no driver defined for %s \"%s\"", class, d->name);
3848 (d->info->init)(d);
3849 }
3850 }
3851
3852
3853
3854 /*************************************************
3855 * Check driver dependency *
3856 *************************************************/
3857
3858 /* This function is passed a driver instance and a string. It checks whether
3859 any of the string options for the driver contains the given string as an
3860 expansion variable.
3861
3862 Arguments:
3863 d points to a driver instance block
3864 s the string to search for
3865
3866 Returns: TRUE if a dependency is found
3867 */
3868
3869 BOOL
3870 readconf_depends(driver_instance *d, uschar *s)
3871 {
3872 int count = *(d->info->options_count);
3873 uschar *ss;
3874
3875 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3876 {
3877 void *options_block;
3878 uschar *value;
3879 int type = ol->type & opt_mask;
3880 if (type != opt_stringptr) continue;
3881 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3882 value = *(uschar **)(US options_block + (long int)(ol->value));
3883 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3884 {
3885 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3886 isalnum(ss[Ustrlen(s)])) continue;
3887 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3888 d->name, ol->name, s);
3889 return TRUE;
3890 }
3891 }
3892
3893 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3894 return FALSE;
3895 }
3896
3897
3898
3899
3900 /*************************************************
3901 * Decode an error type for retries *
3902 *************************************************/
3903
3904 /* This function is global because it is also called from the main
3905 program when testing retry information. It decodes strings such as "quota_7d"
3906 into numerical error codes.
3907
3908 Arguments:
3909 pp points to start of text
3910 p points past end of text
3911 basic_errno points to an int to receive the main error number
3912 more_errno points to an int to receive the secondary error data
3913
3914 Returns: NULL if decoded correctly; else points to error text
3915 */
3916
3917 uschar *
3918 readconf_retry_error(const uschar *pp, const uschar *p,
3919 int *basic_errno, int *more_errno)
3920 {
3921 int len;
3922 const uschar *q = pp;
3923 while (q < p && *q != '_') q++;
3924 len = q - pp;
3925
3926 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3927 {
3928 *basic_errno = ERRNO_EXIMQUOTA;
3929 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3930 return US"bad time value";
3931 }
3932
3933 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3934 {
3935 *basic_errno = ECONNREFUSED;
3936 if (q != p)
3937 {
3938 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3939 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3940 else return US"A or MX expected after \"refused\"";
3941 }
3942 }
3943
3944 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3945 {
3946 *basic_errno = ETIMEDOUT;
3947 if (q != p)
3948 {
3949 int i;
3950 int xlen = p - q - 1;
3951 const uschar *x = q + 1;
3952
3953 static uschar *extras[] =
3954 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3955 static int values[] =
3956 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3957
3958 for (i = 0; i < nelem(extras); i++)
3959 if (strncmpic(x, extras[i], xlen) == 0)
3960 {
3961 *more_errno = values[i];
3962 break;
3963 }
3964
3965 if (i >= nelem(extras))
3966 if (strncmpic(x, US"DNS", xlen) == 0)
3967 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3968 "available in retry rules (it has never worked) - treated as "
3969 "\"timeout\"");
3970 else
3971 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3972 }
3973 }
3974
3975 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3976 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3977 strncmpic(pp, US"data_4", 6) == 0)
3978 {
3979 BOOL bad = FALSE;
3980 int x = 255; /* means "any 4xx code" */
3981 if (p != pp + 8) bad = TRUE; else
3982 {
3983 int a = pp[6], b = pp[7];
3984 if (isdigit(a))
3985 {
3986 x = (a - '0') * 10;
3987 if (isdigit(b)) x += b - '0';
3988 else if (b == 'x') x += 100;
3989 else bad = TRUE;
3990 }
3991 else if (a != 'x' || b != 'x') bad = TRUE;
3992 }
3993
3994 if (bad)
3995 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3996 "x is literal and d is any digit", pp);
3997
3998 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3999 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4000 *more_errno = x << 8;
4001 }
4002
4003 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4004 strncmpic(q+1, US"failed", p-q-1) == 0)
4005 *basic_errno = ERRNO_AUTHFAIL;
4006
4007 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4008 *basic_errno = ERRNO_SMTPCLOSED;
4009
4010 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4011 *basic_errno = ERRNO_TLSREQUIRED;
4012
4013 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4014 *basic_errno = ERRNO_UNKNOWNHOST;
4015
4016 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4017 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4018
4019 return NULL;
4020 }
4021
4022
4023
4024
4025 /*************************************************
4026 * Read retry information *
4027 *************************************************/
4028
4029 /* Each line of retry information contains:
4030
4031 . A domain name pattern or an address pattern;
4032
4033 . An error name, possibly with additional data, or *;
4034
4035 . An optional sequence of retry items, each consisting of an identifying
4036 letter, a cutoff time, and optional parameters.
4037
4038 All this is decoded and placed into a control block. */
4039
4040
4041 /* Subroutine to read an argument, preceded by a comma and terminated
4042 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4043 1 = fixed point number (returned *1000).
4044
4045 Arguments:
4046 paddr pointer to pointer to current character; updated
4047 type 0 => read a time; 1 => read a fixed point number
4048
4049 Returns: time in seconds or fixed point number * 1000
4050 */
4051
4052 static int
4053 retry_arg(const uschar **paddr, int type)
4054 {
4055 const uschar *p = *paddr;
4056 const uschar *pp;
4057
4058 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4059
4060 while (isspace(*p)) p++;
4061 pp = p;
4062 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4063
4064 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4065 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4066
4067 *paddr = p;
4068 switch (type)
4069 {
4070 case 0: return readconf_readtime(pp, *p, FALSE);
4071 case 1: return readconf_readfixed(pp, *p);
4072 }
4073 return 0; /* Keep picky compilers happy */
4074 }
4075
4076 /* The function proper */
4077
4078 void
4079 readconf_retries(void)
4080 {
4081 retry_config **chain = &retries;
4082 retry_config *next;
4083 const uschar *p;
4084
4085 while ((p = get_config_line()))
4086 {
4087 retry_rule **rchain;
4088 const uschar *pp;
4089 uschar *error;
4090
4091 next = store_get(sizeof(retry_config));
4092 next->next = NULL;
4093 *chain = next;
4094 chain = &(next->next);
4095 next->basic_errno = next->more_errno = 0;
4096 next->senders = NULL;
4097 next->rules = NULL;
4098 rchain = &(next->rules);
4099
4100 next->pattern = string_dequote(&p);
4101 while (isspace(*p)) p++;
4102 pp = p;
4103 while (mac_isgraph(*p)) p++;
4104 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4105 "missing error type in retry rule");
4106
4107 /* Test error names for things we understand. */
4108
4109 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4110 &next->more_errno)))
4111 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4112
4113 /* There may be an optional address list of senders to be used as another
4114 constraint on the rule. This was added later, so the syntax is a bit of a
4115 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4116 an address list. */
4117
4118 while (isspace(*p)) p++;
4119 if (Ustrncmp(p, "senders", 7) == 0)
4120 {
4121 p += 7;
4122 while (isspace(*p)) p++;
4123 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4124 "\"=\" expected after \"senders\" in retry rule");
4125 while (isspace(*p)) p++;
4126 next->senders = string_dequote(&p);
4127 }
4128
4129 /* Now the retry rules. Keep the maximum timeout encountered. */
4130
4131 while (isspace(*p)) p++;
4132
4133 while (*p != 0)
4134 {
4135 retry_rule *rule = store_get(sizeof(retry_rule));
4136 *rchain = rule;
4137 rchain = &(rule->next);
4138 rule->next = NULL;
4139 rule->rule = toupper(*p++);
4140 rule->timeout = retry_arg(&p, 0);
4141 if (rule->timeout > retry_maximum_timeout)
4142 retry_maximum_timeout = rule->timeout;
4143
4144 switch (rule->rule)
4145 {
4146 case 'F': /* Fixed interval */
4147 rule->p1 = retry_arg(&p, 0);
4148 break;
4149
4150 case 'G': /* Geometrically increasing intervals */
4151 case 'H': /* Ditto, but with randomness */
4152 rule->p1 = retry_arg(&p, 0);
4153 rule->p2 = retry_arg(&p, 1);
4154 break;
4155
4156 default:
4157 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4158 break;
4159 }
4160
4161 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4162 (rule->rule != 'F' && rule->p2 < 1000))
4163 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4164 "bad parameters for retry rule");
4165
4166 while (isspace(*p)) p++;
4167 if (*p == ';')
4168 {
4169 p++;
4170 while (isspace(*p)) p++;
4171 }
4172 else if (*p != 0)
4173 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4174 }
4175 }
4176 }
4177
4178
4179
4180 /*************************************************
4181 * Initialize authenticators *
4182 *************************************************/
4183
4184 /* Read the authenticators section of the configuration file.
4185
4186 Arguments: none
4187 Returns: nothing
4188 */
4189
4190 static void
4191 auths_init(void)
4192 {
4193 #ifdef EXPERIMENTAL_PIPE_CONNECT
4194 int nauths = 0;
4195 #endif
4196
4197 readconf_driver_init(US"authenticator",
4198 (driver_instance **)(&auths), /* chain anchor */
4199 (driver_info *)auths_available, /* available drivers */
4200 sizeof(auth_info), /* size of info block */
4201 &auth_defaults, /* default values for generic options */
4202 sizeof(auth_instance), /* size of instance block */
4203 optionlist_auths, /* generic options */
4204 optionlist_auths_size);
4205
4206 for (auth_instance * au = auths; au; au = au->next)
4207 {
4208 if (!au->public_name)
4209 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4210 "the %s authenticator", au->name);
4211
4212 for (auth_instance * bu = au->next; bu; bu = bu->next)
4213 if (strcmpic(au->public_name, bu->public_name) == 0)
4214 if ((au->client && bu->client) || (au->server && bu->server))
4215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4216 "(%s and %s) have the same public name (%s)",
4217 au->client ? US"client" : US"server", au->name, bu->name,
4218 au->public_name);
4219 #ifdef EXPERIMENTAL_PIPE_CONNECT
4220 nauths++;
4221 #endif
4222 }
4223 #ifdef EXPERIMENTAL_PIPE_CONNECT
4224 f.smtp_in_early_pipe_no_auth = nauths > 16;
4225 #endif
4226 }
4227
4228
4229
4230
4231 /*************************************************
4232 * Read ACL information *
4233 *************************************************/
4234
4235 /* If this run of Exim is not doing something that involves receiving a
4236 message, we can just skip over the ACL information. No need to parse it.
4237
4238 First, we have a function for acl_read() to call back to get the next line. We
4239 need to remember the line we passed, because at the end it will contain the
4240 name of the next ACL. */
4241
4242 static uschar *acl_line;
4243
4244 static uschar *
4245 acl_callback(void)
4246 {
4247 acl_line = get_config_line();
4248 return acl_line;
4249 }
4250
4251
4252 /* Now the main function:
4253
4254 Arguments: none
4255 Returns: nothing
4256 */
4257
4258 static void
4259 readconf_acl(void)
4260 {
4261 uschar *p;
4262
4263 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4264 between ACLs. */
4265
4266 acl_line = get_config_line();
4267
4268 while(acl_line)
4269 {
4270 uschar name[64];
4271 tree_node *node;
4272 uschar *error;
4273
4274 p = readconf_readname(name, sizeof(name), acl_line);
4275 if (isupper(*name) && *p == '=')
4276 {
4277 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4278 acl_line = get_config_line();
4279 continue;
4280 }
4281
4282 if (*p != ':' || name[0] == 0)
4283 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4284
4285 node = store_get(sizeof(tree_node) + Ustrlen(name));
4286 Ustrcpy(node->name, name);
4287 if (!tree_insertnode(&acl_anchor, node))
4288 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4289 "there are two ACLs called \"%s\"", name);
4290
4291 node->data.ptr = acl_read(acl_callback, &error);
4292
4293 if (node->data.ptr == NULL && error != NULL)
4294 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4295 }
4296 }
4297
4298
4299
4300 /*************************************************
4301 * Read configuration for local_scan() *
4302 *************************************************/
4303
4304 /* This function is called after "begin local_scan" is encountered in the
4305 configuration file. If the local_scan() function allows for configuration
4306 options, we can process them. Otherwise, we expire in a panic.
4307
4308 Arguments: none
4309 Returns: nothing
4310 */
4311
4312 static void
4313 local_scan_init(void)
4314 {
4315 #ifndef LOCAL_SCAN_HAS_OPTIONS
4316 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4317 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4318 #else
4319
4320 uschar *p;
4321 while ((p = get_config_line()))
4322 {
4323 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4324 NULL, US"local_scan option \"%s\" unknown");
4325 }
4326 #endif
4327 }
4328
4329
4330
4331 /*************************************************
4332 * Read rest of configuration (after main) *
4333 *************************************************/
4334
4335 /* This function reads the rest of the runtime configuration, after the main
4336 configuration. It is called only when actually needed. Each subsequent section
4337 of the configuration starts with a line of the form
4338
4339 begin name
4340
4341 where the name is "routers", "transports", etc. A section is terminated by
4342 hitting the next "begin" line, and the next name is left in next_section.
4343 Because it may confuse people as to whether the names are singular or plural,
4344 we add "s" if it's missing. There is always enough room in next_section for
4345 this. This function is basically just a switch.
4346
4347 Arguments: none
4348 Returns: nothing
4349 */
4350
4351 static uschar *section_list[] = {
4352 US"acls",
4353 US"authenticators",
4354 US"local_scans",
4355 US"retrys",
4356 US"rewrites",
4357 US"routers",
4358 US"transports"};
4359
4360 void
4361 readconf_rest(void)
4362 {
4363 int had = 0;
4364
4365 while(next_section[0] != 0)
4366 {
4367 int bit;
4368 int first = 0;
4369 int last = nelem(section_list);
4370 int mid = last/2;
4371 int n = Ustrlen(next_section);
4372
4373 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4374
4375 for (;;)
4376 {
4377 int c = strcmpic(next_section, section_list[mid]);
4378 if (c == 0) break;
4379 if (c > 0) first = mid + 1; else last = mid;
4380 if (first >= last)
4381 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4382 "\"%.*s\" is not a known configuration section name", n, next_section);
4383 mid = (last + first)/2;
4384 }
4385
4386 bit = 1 << mid;
4387 if (((had ^= bit) & bit) == 0)
4388 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4389 "\"%.*s\" section is repeated in the configuration file", n,
4390 next_section);
4391
4392 switch(mid)
4393 {
4394 case 0: readconf_acl(); break;
4395 case 1: auths_init(); break;
4396 case 2: local_scan_init(); break;
4397 case 3: readconf_retries(); break;
4398 case 4: readconf_rewrites(); break;
4399 case 5: route_init(); break;
4400 case 6: transport_init(); break;
4401 }
4402 }
4403
4404 (void)fclose(config_file);
4405 }
4406
4407 /* Init the storage for the pre-parsed config lines */
4408 void
4409 readconf_save_config(const uschar *s)
4410 {
4411 save_config_line(string_sprintf("# Exim Configuration (%s)",
4412 f.running_in_test_harness ? US"X" : s));
4413 }
4414
4415 static void
4416 save_config_position(const uschar *file, int line)
4417 {
4418 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4419 }
4420
4421 /* Append a pre-parsed logical line to the config lines store,
4422 this operates on a global (static) list that holds all the pre-parsed
4423 config lines, we do no further processing here, output formatting and
4424 honouring of <hide> or macros will be done during output */
4425
4426 static void
4427 save_config_line(const uschar* line)
4428 {
4429 static config_line_item *current;
4430 config_line_item *next;
4431
4432 next = (config_line_item*) store_get(sizeof(config_line_item));
4433 next->line = string_copy(line);
4434 next->next = NULL;
4435
4436 if (!config_lines) config_lines = next;
4437 else current->next = next;
4438
4439 current = next;
4440 }
4441
4442 /* List the parsed config lines, care about nice formatting and
4443 hide the <hide> values unless we're the admin user */
4444 void
4445 print_config(BOOL admin, BOOL terse)
4446 {
4447 const int TS = terse ? 0 : 2;
4448 int indent = 0;
4449
4450 for (config_line_item * i = config_lines; i; i = i->next)
4451 {
4452 uschar *current;
4453 uschar *p;
4454
4455 /* skip over to the first non-space */
4456 for (current = i->line; *current && isspace(*current); ++current)
4457 ;
4458
4459 if (*current == '\0')
4460 continue;
4461
4462 /* Collapse runs of spaces. We stop this if we encounter one of the
4463 * following characters: "'$, as this may indicate careful formatting */
4464 for (p = current; *p; ++p)
4465 {
4466 uschar *next;
4467 if (!isspace(*p)) continue;
4468 if (*p != ' ') *p = ' ';
4469
4470 for (next = p; isspace(*next); ++next)
4471 ;
4472
4473 if (next - p > 1)
4474 memmove(p+1, next, Ustrlen(next)+1);
4475
4476 if (*next == '"' || *next == '\'' || *next == '$')
4477 break;
4478 }
4479
4480 /* # lines */
4481 if (current[0] == '#')
4482 puts(CCS current);
4483
4484 /* begin lines are left aligned */
4485 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4486 {
4487 if (!terse) puts("");
4488 puts(CCS current);
4489 indent = TS;
4490 }
4491
4492 /* router/acl/transport block names */
4493 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4494 {
4495 if (!terse) puts("");
4496 printf("%*s%s\n", TS, "", current);
4497 indent = 2 * TS;
4498 }
4499
4500 /* hidden lines (all MACROS or lines prefixed with "hide") */
4501 else if ( !admin
4502 && ( isupper(*current)
4503 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4504 )
4505 )
4506 {
4507 if ((p = Ustrchr(current, '=')))
4508 {
4509 *p = '\0';
4510 printf("%*s%s= %s\n", indent, "", current, hidden);
4511 }
4512 /* e.g.: hide split_spool_directory */
4513 else
4514 printf("%*s\n", indent, hidden);
4515 }
4516
4517 else
4518 /* rest is public */
4519 printf("%*s%s\n", indent, "", current);
4520 }
4521 }
4522
4523 #endif /*!MACRO_PREDEF*/
4524 /* vi: aw ai sw=2
4525 */
4526 /* End of readconf.c */
Unnamed repository; edit this file 'description' to name the repository.