b6c41bc65ddf322dabb53b1921eef5cdc777218e
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #ifdef MACRO_PREDEF
15 # include "macro_predef.h"
16 #endif
17
18 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
19
20
21 static uschar * syslog_facility_str;
22 static void fn_smtp_receive_timeout(const uschar *, const uschar *, unsigned);
23
24 /*************************************************
25 * Main configuration options *
26 *************************************************/
27
28 /* The list of options that can be set in the main configuration file. This
29 must be in alphabetic order because it is searched by binary chop. */
30
31 static optionlist optionlist_config[] = {
32 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
33 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
34 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
35 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
36 { "accept_8bitmime", opt_bool, &accept_8bitmime },
37 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
38 #ifdef WITH_CONTENT_SCAN
39 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
40 #endif
41 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
42 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
43 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
44 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
45 #ifndef DISABLE_PRDR
46 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
47 #endif
48 #ifndef DISABLE_DKIM
49 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
50 #endif
51 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
52 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
53 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
54 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
55 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
56 #ifdef WITH_CONTENT_SCAN
57 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
58 #endif
59 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
60 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
61 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
62 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
63 #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 { "exim_version", opt_stringptr, &version_string },
153 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
154 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
155 { "finduser_retries", opt_int, &finduser_retries },
156 { "freeze_tell", opt_stringptr, &freeze_tell },
157 { "gecos_name", opt_stringptr, &gecos_name },
158 { "gecos_pattern", opt_stringptr, &gecos_pattern },
159 #ifdef SUPPORT_TLS
160 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
161 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
162 #endif
163 { "header_line_maxsize", opt_int, &header_line_maxsize },
164 { "header_maxsize", opt_int, &header_maxsize },
165 { "headers_charset", opt_stringptr, &headers_charset },
166 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
167 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
168 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
169 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
170 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
171 { "hold_domains", opt_stringptr, &hold_domains },
172 { "host_lookup", opt_stringptr, &host_lookup },
173 { "host_lookup_order", opt_stringptr, &host_lookup_order },
174 { "host_reject_connection", opt_stringptr, &host_reject_connection },
175 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
176 #ifdef SUPPORT_PROXY
177 { "hosts_proxy", opt_stringptr, &hosts_proxy },
178 #endif
179 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
180 #ifdef LOOKUP_IBASE
181 { "ibase_servers", opt_stringptr, &ibase_servers },
182 #endif
183 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
184 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
185 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
186 { "keep_environment", opt_stringptr, &keep_environment },
187 { "keep_malformed", opt_time, &keep_malformed },
188 #ifdef LOOKUP_LDAP
189 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
190 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
191 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
192 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
193 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
194 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
195 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
196 { "ldap_start_tls", opt_bool, &eldap_start_tls },
197 { "ldap_version", opt_int, &eldap_version },
198 #endif
199 { "local_from_check", opt_bool, &local_from_check },
200 { "local_from_prefix", opt_stringptr, &local_from_prefix },
201 { "local_from_suffix", opt_stringptr, &local_from_suffix },
202 { "local_interfaces", opt_stringptr, &local_interfaces },
203 #ifdef HAVE_LOCAL_SCAN
204 { "local_scan_timeout", opt_time, &local_scan_timeout },
205 #endif
206 { "local_sender_retain", opt_bool, &local_sender_retain },
207 { "localhost_number", opt_stringptr, &host_number_string },
208 { "log_file_path", opt_stringptr, &log_file_path },
209 { "log_selector", opt_stringptr, &log_selector_string },
210 { "log_timezone", opt_bool, &log_timezone },
211 { "lookup_open_max", opt_int, &lookup_open_max },
212 { "max_username_length", opt_int, &max_username_length },
213 { "message_body_newlines", opt_bool, &message_body_newlines },
214 { "message_body_visible", opt_mkint, &message_body_visible },
215 { "message_id_header_domain", opt_stringptr, &message_id_domain },
216 { "message_id_header_text", opt_stringptr, &message_id_text },
217 { "message_logs", opt_bool, &message_logs },
218 { "message_size_limit", opt_stringptr, &message_size_limit },
219 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
220 { "move_frozen_messages", opt_bool, &move_frozen_messages },
221 #endif
222 { "mua_wrapper", opt_bool, &mua_wrapper },
223 #ifdef LOOKUP_MYSQL
224 { "mysql_servers", opt_stringptr, &mysql_servers },
225 #endif
226 { "never_users", opt_uidlist, &never_users },
227 #ifdef SUPPORT_TLS
228 { "openssl_options", opt_stringptr, &openssl_options },
229 #endif
230 #ifdef LOOKUP_ORACLE
231 { "oracle_servers", opt_stringptr, &oracle_servers },
232 #endif
233 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
234 #ifdef EXIM_PERL
235 { "perl_at_start", opt_bool, &opt_perl_at_start },
236 { "perl_startup", opt_stringptr, &opt_perl_startup },
237 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
238 #endif
239 #ifdef LOOKUP_PGSQL
240 { "pgsql_servers", opt_stringptr, &pgsql_servers },
241 #endif
242 { "pid_file_path", opt_stringptr, &pid_file_path },
243 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
244 #ifdef EXPERIMENTAL_PIPE_CONNECT
245 { "pipelining_connect_advertise_hosts", opt_stringptr,
246 &pipe_connect_advertise_hosts },
247 #endif
248 #ifndef DISABLE_PRDR
249 { "prdr_enable", opt_bool, &prdr_enable },
250 #endif
251 { "preserve_message_logs", opt_bool, &preserve_message_logs },
252 { "primary_hostname", opt_stringptr, &primary_hostname },
253 { "print_topbitchars", opt_bool, &print_topbitchars },
254 { "process_log_path", opt_stringptr, &process_log_path },
255 { "prod_requires_admin", opt_bool, &prod_requires_admin },
256 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
257 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
258 { "queue_domains", opt_stringptr, &queue_domains },
259 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
260 { "queue_only", opt_bool, &queue_only },
261 { "queue_only_file", opt_stringptr, &queue_only_file },
262 { "queue_only_load", opt_fixed, &queue_only_load },
263 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
264 { "queue_only_override", opt_bool, &queue_only_override },
265 { "queue_run_in_order", opt_bool, &queue_run_in_order },
266 { "queue_run_max", opt_stringptr, &queue_run_max },
267 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
268 { "receive_timeout", opt_time, &receive_timeout },
269 { "received_header_text", opt_stringptr, &received_header_text },
270 { "received_headers_max", opt_int, &received_headers_max },
271 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
272 { "recipients_max", opt_int, &recipients_max },
273 { "recipients_max_reject", opt_bool, &recipients_max_reject },
274 #ifdef LOOKUP_REDIS
275 { "redis_servers", opt_stringptr, &redis_servers },
276 #endif
277 { "remote_max_parallel", opt_int, &remote_max_parallel },
278 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
279 { "retry_data_expire", opt_time, &retry_data_expire },
280 { "retry_interval_max", opt_time, &retry_interval_max },
281 { "return_path_remove", opt_bool, &return_path_remove },
282 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
283 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
284 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
285 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
286 { "slow_lookup_log", opt_int, &slow_lookup_log },
287 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
288 { "smtp_accept_max", opt_int, &smtp_accept_max },
289 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
290 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
291 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
292 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
293 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
294 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
295 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
296 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
297 { "smtp_banner", opt_stringptr, &smtp_banner },
298 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
299 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
300 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
301 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
302 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
303 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
304 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
305 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
306 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
307 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
308 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
309 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
310 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
311 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
312 #ifdef SUPPORT_I18N
313 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
314 #endif
315 #ifdef WITH_CONTENT_SCAN
316 { "spamd_address", opt_stringptr, &spamd_address },
317 #endif
318 #ifdef SUPPORT_SPF
319 { "spf_guess", opt_stringptr, &spf_guess },
320 #endif
321 { "split_spool_directory", opt_bool, &split_spool_directory },
322 { "spool_directory", opt_stringptr, &spool_directory },
323 { "spool_wireformat", opt_bool, &spool_wireformat },
324 #ifdef LOOKUP_SQLITE
325 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
326 #endif
327 #ifdef EXPERIMENTAL_SRS
328 { "srs_config", opt_stringptr, &srs_config },
329 { "srs_hashlength", opt_int, &srs_hashlength },
330 { "srs_hashmin", opt_int, &srs_hashmin },
331 { "srs_maxage", opt_int, &srs_maxage },
332 { "srs_secrets", opt_stringptr, &srs_secrets },
333 { "srs_usehash", opt_bool, &srs_usehash },
334 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
335 #endif
336 { "strict_acl_vars", opt_bool, &strict_acl_vars },
337 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
338 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
339 { "syslog_duplication", opt_bool, &syslog_duplication },
340 { "syslog_facility", opt_stringptr, &syslog_facility_str },
341 { "syslog_pid", opt_bool, &syslog_pid },
342 { "syslog_processname", opt_stringptr, &syslog_processname },
343 { "syslog_timestamp", opt_bool, &syslog_timestamp },
344 { "system_filter", opt_stringptr, &system_filter },
345 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
346 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
347 { "system_filter_group", opt_gid, &system_filter_gid },
348 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
349 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
350 { "system_filter_user", opt_uid, &system_filter_uid },
351 { "tcp_nodelay", opt_bool, &tcp_nodelay },
352 #ifdef USE_TCP_WRAPPERS
353 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
354 #endif
355 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
356 { "timezone", opt_stringptr, &timezone_string },
357 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
358 #ifdef SUPPORT_TLS
359 { "tls_certificate", opt_stringptr, &tls_certificate },
360 { "tls_crl", opt_stringptr, &tls_crl },
361 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
362 { "tls_dhparam", opt_stringptr, &tls_dhparam },
363 { "tls_eccurve", opt_stringptr, &tls_eccurve },
364 # ifndef DISABLE_OCSP
365 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
366 # endif
367 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
368 { "tls_privatekey", opt_stringptr, &tls_privatekey },
369 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
370 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
371 # ifdef EXPERIMENTAL_TLS_RESUME
372 { "tls_resumption_hosts", opt_stringptr, &tls_resumption_hosts },
373 # endif
374 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
375 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
376 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
377 #endif
378 { "trusted_groups", opt_gidlist, &trusted_groups },
379 { "trusted_users", opt_uidlist, &trusted_users },
380 { "unknown_login", opt_stringptr, &unknown_login },
381 { "unknown_username", opt_stringptr, &unknown_username },
382 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
383 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
384 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
385 { "warn_message_file", opt_stringptr, &warn_message_file },
386 { "write_rejectlog", opt_bool, &write_rejectlog }
387 };
388
389 #ifndef MACRO_PREDEF
390 static int optionlist_config_size = nelem(optionlist_config);
391 #endif
392
393
394 #ifdef MACRO_PREDEF
395
396 static void
397 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
398
399 void
400 options_main(void)
401 {
402 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
403 }
404
405 void
406 options_auths(void)
407 {
408 uschar buf[64];
409
410 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
411
412 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
413 {
414 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
415 builtin_macro_create(buf);
416 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
417 }
418 }
419
420 void
421 options_logging(void)
422 {
423 uschar buf[64];
424
425 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
426 {
427 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
428 builtin_macro_create(buf);
429 }
430 }
431
432
433 #else /*!MACRO_PREDEF*/
434
435 extern char **environ;
436
437 static void save_config_line(const uschar* line);
438 static void save_config_position(const uschar *file, int line);
439 static void print_config(BOOL admin, BOOL terse);
440
441
442 #define CSTATE_STACK_SIZE 10
443
444 const uschar *config_directory = NULL;
445
446
447 /* Structure for chain (stack) of .included files */
448
449 typedef struct config_file_item {
450 struct config_file_item *next;
451 const uschar *filename;
452 const uschar *directory;
453 FILE *file;
454 int lineno;
455 } config_file_item;
456
457 /* Structure for chain of configuration lines (-bP config) */
458
459 typedef struct config_line_item {
460 struct config_line_item *next;
461 uschar *line;
462 } config_line_item;
463
464 static config_line_item* config_lines;
465
466 /* Structure of table of conditional words and their state transitions */
467
468 typedef struct cond_item {
469 uschar *name;
470 int namelen;
471 int action1;
472 int action2;
473 int pushpop;
474 } cond_item;
475
476 /* Structure of table of syslog facility names and values */
477
478 typedef struct syslog_fac_item {
479 uschar *name;
480 int value;
481 } syslog_fac_item;
482
483 /* constants */
484 static const char * const hidden = "<value not displayable>";
485
486 /* Static variables */
487
488 static config_file_item *config_file_stack = NULL; /* For includes */
489
490 static uschar *syslog_facility_str = NULL;
491 static uschar next_section[24];
492 static uschar time_buffer[24];
493
494 /* State variables for conditional loading (.ifdef / .else / .endif) */
495
496 static int cstate = 0;
497 static int cstate_stack_ptr = -1;
498 static int cstate_stack[CSTATE_STACK_SIZE];
499
500 /* Table of state transitions for handling conditional inclusions. There are
501 four possible state transitions:
502
503 .ifdef true
504 .ifdef false
505 .elifdef true (or .else)
506 .elifdef false
507
508 .endif just causes the previous cstate to be popped off the stack */
509
510 static int next_cstate[3][4] =
511 {
512 /* State 0: reading from file, or reading until next .else or .endif */
513 { 0, 1, 2, 2 },
514 /* State 1: condition failed, skipping until next .else or .endif */
515 { 2, 2, 0, 1 },
516 /* State 2: skipping until .endif */
517 { 2, 2, 2, 2 },
518 };
519
520 /* Table of conditionals and the states to set. For each name, there are four
521 values: the length of the name (to save computing it each time), the state to
522 set if a macro was found in the line, the state to set if a macro was not found
523 in the line, and a stack manipulation setting which is:
524
525 -1 pull state value off the stack
526 0 don't alter the stack
527 +1 push value onto stack, before setting new state
528 */
529
530 static cond_item cond_list[] = {
531 { US"ifdef", 5, 0, 1, 1 },
532 { US"ifndef", 6, 1, 0, 1 },
533 { US"elifdef", 7, 2, 3, 0 },
534 { US"elifndef", 8, 3, 2, 0 },
535 { US"else", 4, 2, 2, 0 },
536 { US"endif", 5, 0, 0, -1 }
537 };
538
539 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
540
541 /* Table of syslog facility names and their values */
542
543 static syslog_fac_item syslog_list[] = {
544 { US"mail", LOG_MAIL },
545 { US"user", LOG_USER },
546 { US"news", LOG_NEWS },
547 { US"uucp", LOG_UUCP },
548 { US"local0", LOG_LOCAL0 },
549 { US"local1", LOG_LOCAL1 },
550 { US"local2", LOG_LOCAL2 },
551 { US"local3", LOG_LOCAL3 },
552 { US"local4", LOG_LOCAL4 },
553 { US"local5", LOG_LOCAL5 },
554 { US"local6", LOG_LOCAL6 },
555 { US"local7", LOG_LOCAL7 },
556 { US"daemon", LOG_DAEMON }
557 };
558
559 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
560
561
562 #define opt_fn_print BIT(0)
563 #define opt_fn_print_label BIT(1)
564
565
566 /*************************************************
567 * Find the name of an option *
568 *************************************************/
569
570 /* This function is to aid debugging. Various functions take arguments that are
571 pointer variables in the options table or in option tables for various drivers.
572 For debugging output, it is useful to be able to find the name of the option
573 which is currently being processed. This function finds it, if it exists, by
574 searching the table(s).
575
576 Arguments: a value that is presumed to be in the table above
577 Returns: the option name, or an empty string
578 */
579
580 uschar *
581 readconf_find_option(void *p)
582 {
583 for (int i = 0; i < nelem(optionlist_config); i++)
584 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
585
586 for (router_instance * r = routers; r; r = r->next)
587 {
588 router_info *ri = r->info;
589 for (int i = 0; i < *ri->options_count; i++)
590 {
591 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
592 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
593 return US ri->options[i].name;
594 }
595 }
596
597 for (transport_instance * t = transports; t; t = t->next)
598 {
599 transport_info *ti = t->info;
600 for (int i = 0; i < *ti->options_count; i++)
601 {
602 optionlist * op = &ti->options[i];
603 if ((op->type & opt_mask) != opt_stringptr) continue;
604 if (p == ( op->type & opt_public
605 ? CS t
606 : CS t->options_block
607 )
608 + (long int)op->value)
609 return US op->name;
610 }
611 }
612
613 return US"";
614 }
615
616
617
618
619 /*************************************************
620 * Deal with an assignment to a macro *
621 *************************************************/
622
623 /* We have a new definition; append to the list.
624
625 Args:
626 name Name of the macro; will be copied
627 val Expansion result for the macro; will be copied
628 */
629
630 macro_item *
631 macro_create(const uschar * name, const uschar * val, BOOL command_line)
632 {
633 macro_item * m = store_get(sizeof(macro_item));
634
635 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
636 m->next = NULL;
637 m->command_line = command_line;
638 m->namelen = Ustrlen(name);
639 m->replen = Ustrlen(val);
640 m->name = string_copy(name);
641 m->replacement = string_copy(val);
642 if (mlast)
643 mlast->next = m;
644 else
645 macros = m;
646 mlast = m;
647 if (!macros_user)
648 macros_user = m;
649 return m;
650 }
651
652
653 /* This function is called when a line that starts with an upper case letter is
654 encountered. The argument "line" should contain a complete logical line, and
655 start with the first letter of the macro name. The macro name and the
656 replacement text are extracted and stored. Redefinition of existing,
657 non-command line, macros is permitted using '==' instead of '='.
658
659 Arguments:
660 s points to the start of the logical line
661
662 Returns: FALSE iff fatal error
663 */
664
665 BOOL
666 macro_read_assignment(uschar *s)
667 {
668 uschar name[64];
669 int namelen = 0;
670 BOOL redef = FALSE;
671 macro_item *m;
672
673 while (isalnum(*s) || *s == '_')
674 {
675 if (namelen >= sizeof(name) - 1)
676 {
677 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
678 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
679 return FALSE;
680 }
681 name[namelen++] = *s++;
682 }
683 name[namelen] = 0;
684
685 while (isspace(*s)) s++;
686 if (*s++ != '=')
687 {
688 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
689 return FALSE;
690 }
691
692 if (*s == '=')
693 {
694 redef = TRUE;
695 s++;
696 }
697 while (isspace(*s)) s++;
698
699 /* If an existing macro of the same name was defined on the command line, we
700 just skip this definition. It's an error to attempt to redefine a macro without
701 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
702 It is also an error to define a macro whose name begins with the name of a
703 previously defined macro. This is the requirement that make using a tree
704 for macros hard; we must check all macros for the substring. Perhaps a
705 sorted list, and a bsearch, would work?
706 Note: it is documented that the other way round works. */
707
708 for (m = macros; m; m = m->next)
709 {
710 if (Ustrcmp(m->name, name) == 0)
711 {
712 if (!m->command_line && !redef)
713 {
714 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
715 "defined (use \"==\" if you want to redefine it)", name);
716 return FALSE;
717 }
718 break;
719 }
720
721 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
722 {
723 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
724 "a macro because previously defined macro \"%s\" is a substring",
725 name, m->name);
726 return FALSE;
727 }
728
729 /* We cannot have this test, because it is documented that a substring
730 macro is permitted (there is even an example).
731 *
732 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
733 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
734 * "a macro because it is a substring of previously defined macro \"%s\"",
735 * name, m->name);
736 */
737 }
738
739 /* Check for an overriding command-line definition. */
740
741 if (m && m->command_line) return TRUE;
742
743 /* Redefinition must refer to an existing macro. */
744
745 if (redef)
746 if (m)
747 {
748 m->replen = Ustrlen(s);
749 m->replacement = string_copy(s);
750 }
751 else
752 {
753 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
754 "\"%s\"", name);
755 return FALSE;
756 }
757
758 /* We have a new definition. */
759 else
760 (void) macro_create(name, s, FALSE);
761 return TRUE;
762 }
763
764
765
766
767
768 /* Process line for macros. The line is in big_buffer starting at offset len.
769 Expand big_buffer if needed. Handle definitions of new macros, and
770 macro expansions, rewriting the line in the buffer.
771
772 Arguments:
773 len Offset in buffer of start of line
774 newlen Pointer to offset of end of line, updated on return
775 macro_found Pointer to return that a macro was expanded
776
777 Return: pointer to first nonblank char in line
778 */
779
780 uschar *
781 macros_expand(int len, int * newlen, BOOL * macro_found)
782 {
783 uschar * ss = big_buffer + len;
784 uschar * s;
785
786 /* Find the true start of the physical line - leading spaces are always
787 ignored. */
788
789 while (isspace(*ss)) ss++;
790
791 /* Process the physical line for macros. If this is the start of the logical
792 line, skip over initial text at the start of the line if it starts with an
793 upper case character followed by a sequence of name characters and an equals
794 sign, because that is the definition of a new macro, and we don't do
795 replacement therein. */
796
797 s = ss;
798 if (len == 0 && isupper(*s))
799 {
800 while (isalnum(*s) || *s == '_') s++;
801 while (isspace(*s)) s++;
802 if (*s != '=') s = ss; /* Not a macro definition */
803 }
804
805 /* Skip leading chars which cannot start a macro name, to avoid multiple
806 pointless rescans in Ustrstr calls. */
807
808 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
809
810 /* For each defined macro, scan the line (from after XXX= if present),
811 replacing all occurrences of the macro. */
812
813 *macro_found = FALSE;
814 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
815 {
816 uschar * p, *pp;
817 uschar * t;
818
819 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
820 if (!*s) break;
821
822 t = s;
823 while ((p = Ustrstr(t, m->name)) != NULL)
824 {
825 int moveby;
826
827 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
828 m->name, (int) Ustrlen(ss)-1, ss);
829 /* Expand the buffer if necessary */
830
831 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
832 {
833 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
834 uschar *newbuffer = store_malloc(newsize);
835 memcpy(newbuffer, big_buffer, *newlen + 1);
836 p = newbuffer + (p - big_buffer);
837 s = newbuffer + (s - big_buffer);
838 ss = newbuffer + (ss - big_buffer);
839 t = newbuffer + (t - big_buffer);
840 big_buffer_size = newsize;
841 store_free(big_buffer);
842 big_buffer = newbuffer;
843 }
844
845 /* Shuffle the remaining characters up or down in the buffer before
846 copying in the replacement text. Don't rescan the replacement for this
847 same macro. */
848
849 pp = p + m->namelen;
850 if ((moveby = m->replen - m->namelen) != 0)
851 {
852 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
853 *newlen += moveby;
854 }
855 Ustrncpy(p, m->replacement, m->replen);
856 t = p + m->replen;
857 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
858 *macro_found = TRUE;
859 }
860 }
861
862 /* An empty macro replacement at the start of a line could mean that ss no
863 longer points to the first non-blank character. */
864
865 while (isspace(*ss)) ss++;
866 return ss;
867 }
868
869 /*************************************************
870 * Read configuration line *
871 *************************************************/
872
873 /* A logical line of text is read from the configuration file into the big
874 buffer, taking account of macros, .includes, and continuations. The size of
875 big_buffer is increased if necessary. The count of configuration lines is
876 maintained. Physical input lines starting with # (ignoring leading white space,
877 and after macro replacement) and empty logical lines are always ignored.
878 Leading and trailing spaces are removed.
879
880 If we hit a line of the form "begin xxxx", the xxxx is placed in the
881 next_section vector, and the function returns NULL, indicating the end of a
882 configuration section. On end-of-file, NULL is returned with next_section
883 empty.
884
885 Arguments: none
886
887 Returns: a pointer to the first non-blank in the line,
888 or NULL if eof or end of section is reached
889 */
890
891 static uschar *
892 get_config_line(void)
893 {
894 int startoffset = 0; /* To first non-blank char in logical line */
895 int len = 0; /* Of logical line so far */
896 int newlen;
897 uschar *s, *ss;
898 BOOL macro_found;
899
900 /* Loop for handling continuation lines, skipping comments, and dealing with
901 .include files. */
902
903 for (;;)
904 {
905 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
906 {
907 if (config_file_stack != NULL) /* EOF inside .include */
908 {
909 (void)fclose(config_file);
910 config_file = config_file_stack->file;
911 config_filename = config_file_stack->filename;
912 config_directory = config_file_stack->directory;
913 config_lineno = config_file_stack->lineno;
914 config_file_stack = config_file_stack->next;
915 if (config_lines)
916 save_config_position(config_filename, config_lineno);
917 continue;
918 }
919
920 /* EOF at top level */
921
922 if (cstate_stack_ptr >= 0)
923 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
924 "Unexpected end of configuration file: .endif missing");
925
926 if (len != 0) break; /* EOF after continuation */
927 next_section[0] = 0; /* EOF at start of logical line */
928 return NULL;
929 }
930
931 config_lineno++;
932 newlen = len + Ustrlen(big_buffer + len);
933
934 if (config_lines && config_lineno == 1)
935 save_config_position(config_filename, config_lineno);
936
937 /* Handle pathologically long physical lines - yes, it did happen - by
938 extending big_buffer at this point. The code also copes with very long
939 logical lines. */
940
941 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
942 {
943 uschar *newbuffer;
944 big_buffer_size += BIG_BUFFER_SIZE;
945 newbuffer = store_malloc(big_buffer_size);
946
947 /* This use of strcpy is OK because we know that the string in the old
948 buffer is shorter than the new buffer. */
949
950 Ustrcpy(newbuffer, big_buffer);
951 store_free(big_buffer);
952 big_buffer = newbuffer;
953 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
954 break;
955 newlen += Ustrlen(big_buffer + newlen);
956 }
957
958 ss = macros_expand(len, &newlen, &macro_found);
959
960 /* Check for comment lines - these are physical lines. */
961
962 if (*ss == '#') continue;
963
964 /* Handle conditionals, which are also applied to physical lines. Conditions
965 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
966 expansion occurred on the rest of the line. A preliminary test for the leading
967 '.' saves effort on most lines. */
968
969 if (*ss == '.')
970 {
971 int i;
972
973 /* Search the list of conditional directives */
974
975 for (i = 0; i < cond_list_size; i++)
976 {
977 int n;
978 cond_item *c = cond_list+i;
979 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
980
981 /* The following character must be white space or end of string */
982
983 n = ss[1 + c->namelen];
984 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
985
986 /* .ifdef and .ifndef push the current state onto the stack, then set
987 a new one from the table. Stack overflow is an error */
988
989 if (c->pushpop > 0)
990 {
991 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
992 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
993 ".%s nested too deeply", c->name);
994 cstate_stack[++cstate_stack_ptr] = cstate;
995 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
996 }
997
998 /* For any of the others, stack underflow is an error. The next state
999 comes either from the stack (.endif) or from the table. */
1000
1001 else
1002 {
1003 if (cstate_stack_ptr < 0)
1004 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1005 ".%s without matching .ifdef", c->name);
1006 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1007 next_cstate[cstate][macro_found? c->action1 : c->action2];
1008 }
1009
1010 /* Having dealt with a directive, break the loop */
1011
1012 break;
1013 }
1014
1015 /* If we have handled a conditional directive, continue with the next
1016 physical line. Otherwise, fall through. */
1017
1018 if (i < cond_list_size) continue;
1019 }
1020
1021 /* If the conditional state is not 0 (actively using these lines), ignore
1022 this input line. */
1023
1024 if (cstate != 0) continue; /* Conditional skip */
1025
1026 /* Handle .include lines - these are also physical lines. */
1027
1028 if (Ustrncmp(ss, ".include", 8) == 0 &&
1029 (isspace(ss[8]) ||
1030 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1031 {
1032 uschar *t;
1033 int include_if_exists = isspace(ss[8])? 0 : 10;
1034 config_file_item *save;
1035 struct stat statbuf;
1036
1037 ss += 9 + include_if_exists;
1038 while (isspace(*ss)) ss++;
1039 t = ss + Ustrlen(ss);
1040 while (t > ss && isspace(t[-1])) t--;
1041 if (*ss == '\"' && t[-1] == '\"')
1042 {
1043 ss++;
1044 t--;
1045 }
1046 *t = 0;
1047
1048 /* We allow relative file names. For security reasons currently
1049 relative names not allowed with .include_if_exists. For .include_if_exists
1050 we need to check the permissions/ownership of the containing folder */
1051 if (*ss != '/')
1052 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1053 "absolute path \"%s\"", ss);
1054 else
1055 {
1056 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1057 ss = string_from_gstring(g);
1058 }
1059
1060 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1061
1062 if (config_lines)
1063 save_config_position(config_filename, config_lineno);
1064 save = store_get(sizeof(config_file_item));
1065 save->next = config_file_stack;
1066 config_file_stack = save;
1067 save->file = config_file;
1068 save->filename = config_filename;
1069 save->directory = config_directory;
1070 save->lineno = config_lineno;
1071
1072 if (!(config_file = Ufopen(ss, "rb")))
1073 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1074 "configuration file %s", ss);
1075
1076 config_filename = string_copy(ss);
1077 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1078 config_lineno = 0;
1079 continue;
1080 }
1081
1082 /* If this is the start of the logical line, remember where the non-blank
1083 data starts. Otherwise shuffle down continuation lines to remove leading
1084 white space. */
1085
1086 if (len == 0)
1087 startoffset = ss - big_buffer;
1088 else
1089 {
1090 s = big_buffer + len;
1091 if (ss > s)
1092 {
1093 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1094 newlen -= ss - s;
1095 }
1096 }
1097
1098 /* Accept the new addition to the line. Remove trailing white space. */
1099
1100 len = newlen;
1101 while (len > 0 && isspace(big_buffer[len-1])) len--;
1102 big_buffer[len] = 0;
1103
1104 /* We are done if the line does not end in backslash and contains some data.
1105 Empty logical lines are ignored. For continuations, remove the backslash and
1106 go round the loop to read the continuation line. */
1107
1108 if (len > 0)
1109 {
1110 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1111 big_buffer[--len] = 0; /* Remove backslash */
1112 }
1113 } /* Loop for reading multiple physical lines */
1114
1115 /* We now have a logical line. Test for the end of a configuration section (or,
1116 more accurately, for the start of the next section). Place the name of the next
1117 section in next_section, and return NULL. If the name given is longer than
1118 next_section, truncate it. It will be unrecognized later, because all the known
1119 section names do fit. Leave space for pluralizing. */
1120
1121 s = big_buffer + startoffset; /* First non-space character */
1122
1123 if (config_lines)
1124 save_config_line(s);
1125
1126 if (strncmpic(s, US"begin ", 6) == 0)
1127 {
1128 s += 6;
1129 while (isspace(*s)) s++;
1130 if (big_buffer + len - s > sizeof(next_section) - 2)
1131 s[sizeof(next_section) - 2] = 0;
1132 Ustrcpy(next_section, s);
1133 return NULL;
1134 }
1135
1136 /* Return the first non-blank character. */
1137
1138 return s;
1139 }
1140
1141
1142
1143 /*************************************************
1144 * Read a name *
1145 *************************************************/
1146
1147 /* The yield is the pointer to the next uschar. Names longer than the
1148 output space are silently truncated. This function is also used from acl.c when
1149 parsing ACLs.
1150
1151 Arguments:
1152 name where to put the name
1153 len length of name
1154 s input pointer
1155
1156 Returns: new input pointer
1157 */
1158
1159 uschar *
1160 readconf_readname(uschar *name, int len, uschar *s)
1161 {
1162 int p = 0;
1163 while (isspace(*s)) s++;
1164 if (isalpha(*s))
1165 {
1166 while (isalnum(*s) || *s == '_')
1167 {
1168 if (p < len-1) name[p++] = *s;
1169 s++;
1170 }
1171 }
1172 name[p] = 0;
1173 while (isspace(*s)) s++;
1174 return s;
1175 }
1176
1177
1178
1179
1180 /*************************************************
1181 * Read a time value *
1182 *************************************************/
1183
1184 /* This function is also called from outside, to read argument
1185 time values. The format of a time value is:
1186
1187 [<n>w][<n>d][<n>h][<n>m][<n>s]
1188
1189 as long as at least one is present. If a format error is encountered,
1190 return a negative value. The value must be terminated by the given
1191 terminator.
1192
1193 Arguments:
1194 s input pointer
1195 terminator required terminating character
1196 return_msec if TRUE, allow fractional seconds and return milliseconds
1197
1198 Returns: the time value, or -1 on syntax error
1199 value is seconds if return_msec is FALSE
1200 value is milliseconds if return_msec is TRUE
1201 */
1202
1203 int
1204 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1205 {
1206 int yield = 0;
1207 for (;;)
1208 {
1209 int value, count;
1210 double fraction;
1211
1212 if (!isdigit(*s)) return -1;
1213 (void)sscanf(CCS s, "%d%n", &value, &count);
1214 s += count;
1215
1216 switch (*s)
1217 {
1218 case 'w': value *= 7;
1219 case 'd': value *= 24;
1220 case 'h': value *= 60;
1221 case 'm': value *= 60;
1222 case 's': s++;
1223 break;
1224
1225 case '.':
1226 if (!return_msec) return -1;
1227 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1228 s += count;
1229 if (*s++ != 's') return -1;
1230 yield += (int)(fraction * 1000.0);
1231 break;
1232
1233 default: return -1;
1234 }
1235
1236 if (return_msec) value *= 1000;
1237 yield += value;
1238 if (*s == terminator) return yield;
1239 }
1240 /* Control never reaches here. */
1241 }
1242
1243
1244
1245 /*************************************************
1246 * Read a fixed point value *
1247 *************************************************/
1248
1249 /* The value is returned *1000
1250
1251 Arguments:
1252 s input pointer
1253 terminator required terminator
1254
1255 Returns: the value, or -1 on error
1256 */
1257
1258 static int
1259 readconf_readfixed(const uschar *s, int terminator)
1260 {
1261 int yield = 0;
1262 int value, count;
1263 if (!isdigit(*s)) return -1;
1264 (void)sscanf(CS s, "%d%n", &value, &count);
1265 s += count;
1266 yield = value * 1000;
1267 if (*s == '.')
1268 {
1269 int m = 100;
1270 while (isdigit((*(++s))))
1271 {
1272 yield += (*s - '0') * m;
1273 m /= 10;
1274 }
1275 }
1276
1277 return (*s == terminator)? yield : (-1);
1278 }
1279
1280
1281
1282 /*************************************************
1283 * Find option in list *
1284 *************************************************/
1285
1286 /* The lists are always in order, so binary chop can be used.
1287
1288 Arguments:
1289 name the option name to search for
1290 ol the first entry in the option list
1291 last one more than the offset of the last entry in the option list
1292
1293 Returns: pointer to an option entry, or NULL if not found
1294 */
1295
1296 static optionlist *
1297 find_option(uschar *name, optionlist *ol, int last)
1298 {
1299 int first = 0;
1300 while (last > first)
1301 {
1302 int middle = (first + last)/2;
1303 int c = Ustrcmp(name, ol[middle].name);
1304
1305 if (c == 0) return ol + middle;
1306 else if (c > 0) first = middle + 1;
1307 else last = middle;
1308 }
1309 return NULL;
1310 }
1311
1312
1313
1314 /*************************************************
1315 * Find a set flag in option list *
1316 *************************************************/
1317
1318 /* Because some versions of Unix make no restrictions on the values of uids and
1319 gids (even negative ones), we cannot represent "unset" by a special value.
1320 There is therefore a separate boolean variable for each one indicating whether
1321 a value is set or not. This function returns a pointer to the boolean, given
1322 the original option name. It is a major disaster if the flag cannot be found.
1323
1324 Arguments:
1325 name the name of the uid or gid option
1326 oltop points to the start of the relevant option list
1327 last one more than the offset of the last item in the option list
1328 data_block NULL when reading main options => data values in the option
1329 list are absolute addresses; otherwise they are byte offsets
1330 in data_block (used for driver options)
1331
1332 Returns: a pointer to the boolean flag.
1333 */
1334
1335 static BOOL *
1336 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1337 {
1338 optionlist *ol;
1339 uschar name2[64];
1340 sprintf(CS name2, "*set_%.50s", name);
1341 ol = find_option(name2, oltop, last);
1342 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1343 "Exim internal error: missing set flag for %s", name);
1344 return (data_block == NULL)? (BOOL *)(ol->value) :
1345 (BOOL *)(US data_block + (long int)(ol->value));
1346 }
1347
1348
1349
1350
1351 /*************************************************
1352 * Output extra characters message and die *
1353 *************************************************/
1354
1355 /* Called when an option line has junk on the end. Sometimes this is because
1356 the sysadmin thinks comments are permitted.
1357
1358 Arguments:
1359 s points to the extra characters
1360 t1..t3 strings to insert in the log message
1361
1362 Returns: doesn't return; dies
1363 */
1364
1365 static void
1366 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1367 {
1368 uschar *comment = US"";
1369 if (*s == '#') comment = US" (# is comment only at line start)";
1370 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1371 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1372 }
1373
1374
1375
1376 /*************************************************
1377 * Read rewrite information *
1378 *************************************************/
1379
1380 /* Each line of rewrite information contains:
1381
1382 . A complete address in the form user@domain, possibly with
1383 leading * for each part; or alternatively, a regex.
1384
1385 . A replacement string (which will be expanded).
1386
1387 . An optional sequence of one-letter flags, indicating which
1388 headers etc. to apply this rule to.
1389
1390 All this is decoded and placed into a control block. The OR of the flags is
1391 maintained in a common word.
1392
1393 Arguments:
1394 p points to the string that makes up the rule
1395 existflags points to the overall flag word
1396 isglobal TRUE if reading global rewrite rules
1397
1398 Returns: the control block for the parsed rule.
1399 */
1400
1401 static rewrite_rule *
1402 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1403 {
1404 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1405
1406 next->next = NULL;
1407 next->key = string_dequote(&p);
1408
1409 while (isspace(*p)) p++;
1410 if (*p == 0)
1411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1412 "missing rewrite replacement string");
1413
1414 next->flags = 0;
1415 next->replacement = string_dequote(&p);
1416
1417 while (*p != 0) switch (*p++)
1418 {
1419 case ' ': case '\t': break;
1420
1421 case 'q': next->flags |= rewrite_quit; break;
1422 case 'w': next->flags |= rewrite_whole; break;
1423
1424 case 'h': next->flags |= rewrite_all_headers; break;
1425 case 's': next->flags |= rewrite_sender; break;
1426 case 'f': next->flags |= rewrite_from; break;
1427 case 't': next->flags |= rewrite_to; break;
1428 case 'c': next->flags |= rewrite_cc; break;
1429 case 'b': next->flags |= rewrite_bcc; break;
1430 case 'r': next->flags |= rewrite_replyto; break;
1431
1432 case 'E': next->flags |= rewrite_all_envelope; break;
1433 case 'F': next->flags |= rewrite_envfrom; break;
1434 case 'T': next->flags |= rewrite_envto; break;
1435
1436 case 'Q': next->flags |= rewrite_qualify; break;
1437 case 'R': next->flags |= rewrite_repeat; break;
1438
1439 case 'S':
1440 next->flags |= rewrite_smtp;
1441 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1442 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1443 "rewrite rule has the S flag but is not a regular expression");
1444 break;
1445
1446 default:
1447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1448 "unknown rewrite flag character '%c' "
1449 "(could be missing quotes round replacement item)", p[-1]);
1450 break;
1451 }
1452
1453 /* If no action flags are set, set all the "normal" rewrites. */
1454
1455 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1456 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1457
1458 /* Remember which exist, for optimization, and return the rule */
1459
1460 *existflags |= next->flags;
1461 return next;
1462 }
1463
1464
1465
1466
1467 /*************************************************
1468 * Read global rewrite information *
1469 *************************************************/
1470
1471 /* Each line is a single rewrite rule; it is parsed into a control block
1472 by readconf_one_rewrite(), and its flags are ORed into the global flag
1473 word rewrite_existflags. */
1474
1475 void
1476 readconf_rewrites(void)
1477 {
1478 rewrite_rule **chain = &global_rewrite_rules;
1479 uschar *p;
1480
1481 while ((p = get_config_line()) != NULL)
1482 {
1483 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1484 *chain = next;
1485 chain = &(next->next);
1486 }
1487 }
1488
1489
1490
1491 /*************************************************
1492 * Read a string *
1493 *************************************************/
1494
1495 /* Strings are read into the normal store pool. As long we aren't too
1496 near the end of the current block, the string will just use what is necessary
1497 on the top of the stacking pool, because string_cat() uses the extension
1498 mechanism.
1499
1500 Argument:
1501 s the rest of the input line
1502 name the option name (for errors)
1503
1504 Returns: pointer to the string
1505 */
1506
1507 static uschar *
1508 read_string(const uschar *s, const uschar *name)
1509 {
1510 uschar *yield;
1511 const uschar *ss;
1512
1513 if (*s != '\"') return string_copy(s);
1514
1515 ss = s;
1516 yield = string_dequote(&s);
1517
1518 if (s == ss+1 || s[-1] != '\"')
1519 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1520 "missing quote at end of string value for %s", name);
1521
1522 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1523
1524 return yield;
1525 }
1526
1527
1528 /*************************************************
1529 * Custom-handler options *
1530 *************************************************/
1531 static void
1532 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1533 {
1534 if (flags & opt_fn_print)
1535 {
1536 if (flags & opt_fn_print_label) printf("%s = ", name);
1537 printf("%s\n", smtp_receive_timeout_s
1538 ? string_printing2(smtp_receive_timeout_s, FALSE)
1539 : readconf_printtime(smtp_receive_timeout));
1540 }
1541 else if (*str == '$')
1542 smtp_receive_timeout_s = string_copy(str);
1543 else
1544 {
1545 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1546 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1547 if (smtp_receive_timeout < 0)
1548 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1549 name);
1550 }
1551 }
1552
1553 /*************************************************
1554 * Handle option line *
1555 *************************************************/
1556
1557 /* This function is called from several places to process a line containing the
1558 setting of an option. The first argument is the line to be decoded; it has been
1559 checked not to be empty and not to start with '#'. Trailing newlines and white
1560 space have been removed. The second argument is a pointer to the list of
1561 variable names that are to be recognized, together with their types and
1562 locations, and the third argument gives the number of entries in the list.
1563
1564 The fourth argument is a pointer to a data block. If it is NULL, then the data
1565 values in the options list are absolute addresses. Otherwise, they are byte
1566 offsets in the data block.
1567
1568 String option data may continue onto several lines; this function reads further
1569 data from config_file if necessary.
1570
1571 The yield of this function is normally zero. If a string continues onto
1572 multiple lines, then the data value is permitted to be followed by a comma
1573 or a semicolon (for use in drivers) and the yield is that character.
1574
1575 Arguments:
1576 buffer contains the configuration line to be handled
1577 oltop points to the start of the relevant option list
1578 last one more than the offset of the last item in the option list
1579 data_block NULL when reading main options => data values in the option
1580 list are absolute addresses; otherwise they are byte offsets
1581 in data_block when they have opt_public set; otherwise
1582 they are byte offsets in data_block->options_block.
1583 unknown_txt format string to use in panic message for unknown option;
1584 must contain %s for option name
1585 if given as NULL, don't panic on unknown option
1586
1587 Returns: TRUE if an option was read successfully,
1588 FALSE false for an unknown option if unknown_txt == NULL,
1589 otherwise panic and die on an unknown option
1590 */
1591
1592 static BOOL
1593 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1594 void *data_block, uschar *unknown_txt)
1595 {
1596 int ptr = 0;
1597 int offset = 0;
1598 int count, type, value;
1599 int issecure = 0;
1600 uid_t uid;
1601 gid_t gid;
1602 BOOL boolvalue = TRUE;
1603 BOOL freesptr = TRUE;
1604 optionlist *ol, *ol2;
1605 struct passwd *pw;
1606 void *reset_point;
1607 int intbase = 0;
1608 uschar *inttype = US"";
1609 uschar *sptr;
1610 uschar *s = buffer;
1611 uschar **str_target;
1612 uschar name[64];
1613 uschar name2[64];
1614
1615 /* There may be leading spaces; thereafter, we expect an option name starting
1616 with a letter. */
1617
1618 while (isspace(*s)) s++;
1619 if (!isalpha(*s))
1620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1621
1622 /* Read the name of the option, and skip any subsequent white space. If
1623 it turns out that what we read was "hide", set the flag indicating that
1624 this is a secure option, and loop to read the next word. */
1625
1626 for (int n = 0; n < 2; n++)
1627 {
1628 while (isalnum(*s) || *s == '_')
1629 {
1630 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1631 s++;
1632 }
1633 name[ptr] = 0;
1634 while (isspace(*s)) s++;
1635 if (Ustrcmp(name, "hide") != 0) break;
1636 issecure = opt_secure;
1637 ptr = 0;
1638 }
1639
1640 /* Deal with "no_" or "not_" here for booleans */
1641
1642 if (Ustrncmp(name, "no_", 3) == 0)
1643 {
1644 boolvalue = FALSE;
1645 offset = 3;
1646 }
1647
1648 if (Ustrncmp(name, "not_", 4) == 0)
1649 {
1650 boolvalue = FALSE;
1651 offset = 4;
1652 }
1653
1654 /* Search the list for the given name. A non-existent name, or an option that
1655 is set twice, is a disaster. */
1656
1657 if (!(ol = find_option(name + offset, oltop, last)))
1658 {
1659 if (unknown_txt == NULL) return FALSE;
1660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1661 }
1662
1663 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1664 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1665 "\"%s\" option set for the second time", name);
1666
1667 ol->type |= opt_set | issecure;
1668 type = ol->type & opt_mask;
1669
1670 /* Types with data values must be followed by '='; the "no[t]_" prefix
1671 applies only to boolean values. */
1672
1673 if (type < opt_bool || type > opt_bool_last)
1674 {
1675 if (offset != 0)
1676 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1677 "negation prefix applied to a non-boolean option");
1678 if (*s == 0)
1679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1680 "unexpected end of line (data missing) after %s", name);
1681 if (*s != '=')
1682 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1683 }
1684
1685 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1686 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1687 ultimately expands to one of those values. */
1688
1689 else if (*s != 0 && (offset != 0 || *s != '='))
1690 extra_chars_error(s, US"boolean option ", name, US"");
1691
1692 /* Skip white space after = */
1693
1694 if (*s == '=') while (isspace((*(++s))));
1695
1696 /* If there is a data block and the opt_public flag is not set, change
1697 the data block pointer to the private options block. */
1698
1699 if (data_block != NULL && (ol->type & opt_public) == 0)
1700 data_block = (void *)(((driver_instance *)data_block)->options_block);
1701
1702 /* Now get the data according to the type. */
1703
1704 switch (type)
1705 {
1706 /* If a string value is not enclosed in quotes, it consists of
1707 the rest of the current line, verbatim. Otherwise, string escapes
1708 are processed.
1709
1710 A transport is specified as a string, which is then looked up in the
1711 list of transports. A search type is specified as one of a number of
1712 known strings.
1713
1714 A set or rewrite rules for a driver is specified as a string, which is
1715 then parsed into a suitable chain of control blocks.
1716
1717 Uids and gids are specified as strings which are then looked up in the
1718 passwd file. Lists of uids and gids are similarly specified as colon-
1719 separated strings. */
1720
1721 case opt_stringptr:
1722 case opt_uid:
1723 case opt_gid:
1724 case opt_expand_uid:
1725 case opt_expand_gid:
1726 case opt_uidlist:
1727 case opt_gidlist:
1728 case opt_rewrite:
1729
1730 reset_point = sptr = read_string(s, name);
1731
1732 /* Having read a string, we now have several different ways of using it,
1733 depending on the data type, so do another switch. If keeping the actual
1734 string is not required (because it is interpreted), freesptr is set TRUE,
1735 and at the end we reset the pool. */
1736
1737 switch (type)
1738 {
1739 /* If this was a string, set the variable to point to the new string,
1740 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1741 rules, we still keep the string (for printing), and parse the rules into a
1742 control block and flags word. */
1743
1744 case opt_stringptr:
1745 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1746 : USS (ol->value);
1747 if (ol->type & opt_rep_con)
1748 {
1749 uschar * saved_condition;
1750 /* We already have a condition, we're conducting a crude hack to let
1751 multiple condition rules be chained together, despite storing them in
1752 text form. */
1753 *str_target = string_copy_malloc( (saved_condition = *str_target)
1754 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1755 saved_condition, sptr)
1756 : sptr);
1757 /* TODO(pdp): there is a memory leak here and just below
1758 when we set 3 or more conditions; I still don't
1759 understand the store mechanism enough to know
1760 what's the safe way to free content from an earlier store.
1761 AFAICT, stores stack, so freeing an early stored item also stores
1762 all data alloc'd after it. If we knew conditions were adjacent,
1763 we could survive that, but we don't. So I *think* we need to take
1764 another bit from opt_type to indicate "malloced"; this seems like
1765 quite a hack, especially for this one case. It also means that
1766 we can't ever reclaim the store from the *first* condition.
1767
1768 Because we only do this once, near process start-up, I'm prepared to
1769 let this slide for the time being, even though it rankles. */
1770 }
1771 else if (ol->type & opt_rep_str)
1772 {
1773 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1774 int sep_i = -(int)sep_o;
1775 const uschar * list = sptr;
1776 uschar * s;
1777 gstring * list_o = NULL;
1778
1779 if (*str_target)
1780 {
1781 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1782 list_o = string_cat(list_o, *str_target);
1783 }
1784
1785 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1786 list_o = string_append_listele(list_o, sep_o, s);
1787
1788 if (list_o)
1789 *str_target = string_copy_malloc(string_from_gstring(list_o));
1790 }
1791 else
1792 {
1793 *str_target = sptr;
1794 freesptr = FALSE;
1795 }
1796 break;
1797
1798 case opt_rewrite:
1799 if (data_block)
1800 *USS (US data_block + (long int)(ol->value)) = sptr;
1801 else
1802 *USS (ol->value) = sptr;
1803 freesptr = FALSE;
1804 if (type == opt_rewrite)
1805 {
1806 int sep = 0;
1807 int *flagptr;
1808 uschar *p = sptr;
1809 rewrite_rule **chain;
1810 optionlist *ol3;
1811
1812 sprintf(CS name2, "*%.50s_rules", name);
1813 ol2 = find_option(name2, oltop, last);
1814 sprintf(CS name2, "*%.50s_flags", name);
1815 ol3 = find_option(name2, oltop, last);
1816
1817 if (ol2 == NULL || ol3 == NULL)
1818 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1819 "rewrite rules not available for driver");
1820
1821 if (data_block == NULL)
1822 {
1823 chain = (rewrite_rule **)(ol2->value);
1824 flagptr = (int *)(ol3->value);
1825 }
1826 else
1827 {
1828 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1829 flagptr = (int *)(US data_block + (long int)(ol3->value));
1830 }
1831
1832 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1833 {
1834 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1835 *chain = next;
1836 chain = &(next->next);
1837 }
1838
1839 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1840 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1841 "non-header rewrite - not allowed at transport time -");
1842 }
1843 break;
1844
1845 /* If it was an expanded uid, see if there is any expansion to be
1846 done by checking for the presence of a $ character. If there is, save it
1847 in the corresponding *expand_user option field. Otherwise, fall through
1848 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1849 of data. */
1850
1851 case opt_expand_uid:
1852 sprintf(CS name2, "*expand_%.50s", name);
1853 ol2 = find_option(name2, oltop, last);
1854 if (ol2 != NULL)
1855 {
1856 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1857
1858 if (data_block == NULL)
1859 *((uschar **)(ol2->value)) = ss;
1860 else
1861 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1862
1863 if (ss != NULL)
1864 {
1865 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1866 freesptr = FALSE;
1867 break;
1868 }
1869 }
1870
1871 /* Look up a fixed uid, and also make use of the corresponding gid
1872 if a passwd entry is returned and the gid has not been set. */
1873
1874 case opt_uid:
1875 if (!route_finduser(sptr, &pw, &uid))
1876 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1877 if (data_block == NULL)
1878 *((uid_t *)(ol->value)) = uid;
1879 else
1880 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1881
1882 /* Set the flag indicating a fixed value is set */
1883
1884 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1885
1886 /* Handle matching gid if we have a passwd entry: done by finding the
1887 same name with terminating "user" changed to "group"; if not found,
1888 ignore. Also ignore if the value is already set. */
1889
1890 if (pw == NULL) break;
1891 Ustrcpy(name+Ustrlen(name)-4, "group");
1892 ol2 = find_option(name, oltop, last);
1893 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1894 (ol2->type & opt_mask) == opt_expand_gid))
1895 {
1896 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1897 if (! *set_flag)
1898 {
1899 if (data_block == NULL)
1900 *((gid_t *)(ol2->value)) = pw->pw_gid;
1901 else
1902 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1903 *set_flag = TRUE;
1904 }
1905 }
1906 break;
1907
1908 /* If it was an expanded gid, see if there is any expansion to be
1909 done by checking for the presence of a $ character. If there is, save it
1910 in the corresponding *expand_user option field. Otherwise, fall through
1911 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1912 of data. */
1913
1914 case opt_expand_gid:
1915 sprintf(CS name2, "*expand_%.50s", name);
1916 ol2 = find_option(name2, oltop, last);
1917 if (ol2 != NULL)
1918 {
1919 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1920
1921 if (data_block == NULL)
1922 *((uschar **)(ol2->value)) = ss;
1923 else
1924 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1925
1926 if (ss != NULL)
1927 {
1928 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1929 freesptr = FALSE;
1930 break;
1931 }
1932 }
1933
1934 /* Handle freestanding gid */
1935
1936 case opt_gid:
1937 if (!route_findgroup(sptr, &gid))
1938 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1939 if (data_block == NULL)
1940 *((gid_t *)(ol->value)) = gid;
1941 else
1942 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1943 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1944 break;
1945
1946 /* If it was a uid list, look up each individual entry, and build
1947 a vector of uids, with a count in the first element. Put the vector
1948 in malloc store so we can free the string. (We are reading into
1949 permanent store already.) */
1950
1951 case opt_uidlist:
1952 {
1953 int count = 1;
1954 uid_t *list;
1955 int ptr = 0;
1956 const uschar *p;
1957 const uschar *op = expand_string (sptr);
1958
1959 if (op == NULL)
1960 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1961 name, expand_string_message);
1962
1963 p = op;
1964 if (*p != 0) count++;
1965 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1966 list = store_malloc(count*sizeof(uid_t));
1967 list[ptr++] = (uid_t)(count - 1);
1968
1969 if (data_block == NULL)
1970 *((uid_t **)(ol->value)) = list;
1971 else
1972 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1973
1974 p = op;
1975 while (count-- > 1)
1976 {
1977 int sep = 0;
1978 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1979 if (!route_finduser(big_buffer, NULL, &uid))
1980 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1981 big_buffer);
1982 list[ptr++] = uid;
1983 }
1984 }
1985 break;
1986
1987 /* If it was a gid list, look up each individual entry, and build
1988 a vector of gids, with a count in the first element. Put the vector
1989 in malloc store so we can free the string. (We are reading into permanent
1990 store already.) */
1991
1992 case opt_gidlist:
1993 {
1994 int count = 1;
1995 gid_t *list;
1996 int ptr = 0;
1997 const uschar *p;
1998 const uschar *op = expand_string (sptr);
1999
2000 if (op == NULL)
2001 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2002 name, expand_string_message);
2003
2004 p = op;
2005 if (*p != 0) count++;
2006 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2007 list = store_malloc(count*sizeof(gid_t));
2008 list[ptr++] = (gid_t)(count - 1);
2009
2010 if (data_block == NULL)
2011 *((gid_t **)(ol->value)) = list;
2012 else
2013 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2014
2015 p = op;
2016 while (count-- > 1)
2017 {
2018 int sep = 0;
2019 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2020 if (!route_findgroup(big_buffer, &gid))
2021 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2022 big_buffer);
2023 list[ptr++] = gid;
2024 }
2025 }
2026 break;
2027 }
2028
2029 /* Release store if the value of the string doesn't need to be kept. */
2030
2031 if (freesptr) store_reset(reset_point);
2032 break;
2033
2034 /* Expanded boolean: if no characters follow, or if there are no dollar
2035 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2036 save the string for later expansion in the alternate place. */
2037
2038 case opt_expand_bool:
2039 if (*s != 0 && Ustrchr(s, '$') != 0)
2040 {
2041 sprintf(CS name2, "*expand_%.50s", name);
2042 ol2 = find_option(name2, oltop, last);
2043 if (ol2 != NULL)
2044 {
2045 reset_point = sptr = read_string(s, name);
2046 if (data_block == NULL)
2047 *((uschar **)(ol2->value)) = sptr;
2048 else
2049 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2050 freesptr = FALSE;
2051 break;
2052 }
2053 }
2054 /* Fall through */
2055
2056 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2057 look for yes/not/true/false. Some booleans are stored in a single bit in
2058 a single int. There's a special fudge for verify settings; without a suffix
2059 they set both xx_sender and xx_recipient. The table points to the sender
2060 value; search subsequently for the recipient. There's another special case:
2061 opt_bool_set also notes when a boolean has been set. */
2062
2063 case opt_bool:
2064 case opt_bit:
2065 case opt_bool_verify:
2066 case opt_bool_set:
2067 if (*s != 0)
2068 {
2069 s = readconf_readname(name2, 64, s);
2070 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2071 boolvalue = TRUE;
2072 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2073 boolvalue = FALSE;
2074 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2075 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2076 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2077 US"for boolean option ", name);
2078 }
2079
2080 /* Handle single-bit type. */
2081
2082 if (type == opt_bit)
2083 {
2084 int bit = 1 << ((ol->type >> 16) & 31);
2085 int *ptr = (data_block == NULL)?
2086 (int *)(ol->value) :
2087 (int *)(US data_block + (long int)ol->value);
2088 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2089 break;
2090 }
2091
2092 /* Handle full BOOL types */
2093
2094 if (data_block == NULL)
2095 *((BOOL *)(ol->value)) = boolvalue;
2096 else
2097 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2098
2099 /* Verify fudge */
2100
2101 if (type == opt_bool_verify)
2102 {
2103 sprintf(CS name2, "%.50s_recipient", name + offset);
2104 ol2 = find_option(name2, oltop, last);
2105 if (ol2 != NULL)
2106 {
2107 if (data_block == NULL)
2108 *((BOOL *)(ol2->value)) = boolvalue;
2109 else
2110 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2111 }
2112 }
2113
2114 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2115
2116 else if (type == opt_bool_set)
2117 {
2118 sprintf(CS name2, "*set_%.50s", name + offset);
2119 ol2 = find_option(name2, oltop, last);
2120 if (ol2 != NULL)
2121 {
2122 if (data_block == NULL)
2123 *((BOOL *)(ol2->value)) = TRUE;
2124 else
2125 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2126 }
2127 }
2128 break;
2129
2130 /* Octal integer */
2131
2132 case opt_octint:
2133 intbase = 8;
2134 inttype = US"octal ";
2135
2136 /* Integer: a simple(ish) case; allow octal and hex formats, and
2137 suffixes K, M, G, and T. The different types affect output, not input. */
2138
2139 case opt_mkint:
2140 case opt_int:
2141 {
2142 uschar *endptr;
2143 long int lvalue;
2144
2145 errno = 0;
2146 lvalue = strtol(CS s, CSS &endptr, intbase);
2147
2148 if (endptr == s)
2149 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2150 inttype, name);
2151
2152 if (errno != ERANGE && *endptr)
2153 {
2154 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2155
2156 if ((mp = Ustrchr(mp, *endptr)))
2157 {
2158 endptr++;
2159 do
2160 {
2161 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2162 {
2163 errno = ERANGE;
2164 break;
2165 }
2166 lvalue *= 1024;
2167 }
2168 while (*(mp += 2));
2169 }
2170 }
2171
2172 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2173 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2174 "absolute value of integer \"%s\" is too large (overflow)", s);
2175
2176 while (isspace(*endptr)) endptr++;
2177 if (*endptr)
2178 extra_chars_error(endptr, inttype, US"integer value for ", name);
2179
2180 value = (int)lvalue;
2181 }
2182
2183 if (data_block)
2184 *(int *)(US data_block + (long int)ol->value) = value;
2185 else
2186 *(int *)ol->value = value;
2187 break;
2188
2189 /* Integer held in K: again, allow formats and suffixes as above. */
2190
2191 case opt_Kint:
2192 {
2193 uschar *endptr;
2194 errno = 0;
2195 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2196
2197 if (endptr == s)
2198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2199 inttype, name);
2200
2201 if (errno != ERANGE && *endptr)
2202 {
2203 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2204
2205 if ((mp = Ustrchr(mp, *endptr)))
2206 {
2207 endptr++;
2208 while (*(mp += 2))
2209 {
2210 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2211 {
2212 errno = ERANGE;
2213 break;
2214 }
2215 lvalue *= 1024;
2216 }
2217 }
2218 else
2219 lvalue = (lvalue + 512)/1024;
2220 }
2221
2222 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2223 "absolute value of integer \"%s\" is too large (overflow)", s);
2224
2225 while (isspace(*endptr)) endptr++;
2226 if (*endptr != 0)
2227 extra_chars_error(endptr, inttype, US"integer value for ", name);
2228
2229 if (data_block)
2230 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2231 else
2232 *(int_eximarith_t *)ol->value = lvalue;
2233 break;
2234 }
2235
2236 /* Fixed-point number: held to 3 decimal places. */
2237
2238 case opt_fixed:
2239 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2240 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2241 "fixed-point number expected for %s", name);
2242
2243 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2244 "integer \"%s\" is too large (overflow)", s);
2245
2246 value *= 1000;
2247
2248 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2249 "integer \"%s\" is too large (overflow)", s);
2250
2251 /* We get a coverity error here for using count, as it derived
2252 from the tainted buffer pointed to by s, as parsed by sscanf().
2253 By the definition of sscanf we must be accessing between start
2254 and end of s (assuming it is nul-terminated...) so ignore the error. */
2255 /* coverity[tainted_data] */
2256 if (s[count] == '.')
2257 {
2258 int d = 100;
2259 while (isdigit(s[++count]))
2260 {
2261 value += (s[count] - '0') * d;
2262 d /= 10;
2263 }
2264 }
2265
2266 while (isspace(s[count])) count++;
2267
2268 if (s[count] != 0)
2269 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2270
2271 if (data_block == NULL)
2272 *((int *)(ol->value)) = value;
2273 else
2274 *((int *)(US data_block + (long int)(ol->value))) = value;
2275 break;
2276
2277 /* There's a special routine to read time values. */
2278
2279 case opt_time:
2280 value = readconf_readtime(s, 0, FALSE);
2281 if (value < 0)
2282 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2283 name);
2284 if (data_block == NULL)
2285 *((int *)(ol->value)) = value;
2286 else
2287 *((int *)(US data_block + (long int)(ol->value))) = value;
2288 break;
2289
2290 /* A time list is a list of colon-separated times, with the first
2291 element holding the size of the list and the second the number of
2292 entries used. */
2293
2294 case opt_timelist:
2295 {
2296 int count = 0;
2297 int *list = (data_block == NULL)?
2298 (int *)(ol->value) :
2299 (int *)(US data_block + (long int)(ol->value));
2300
2301 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2302 {
2303 int terminator = 0;
2304 uschar *snext = Ustrchr(s, ':');
2305 if (snext != NULL)
2306 {
2307 uschar *ss = snext;
2308 while (ss > s && isspace(ss[-1])) ss--;
2309 terminator = *ss;
2310 }
2311 value = readconf_readtime(s, terminator, FALSE);
2312 if (value < 0)
2313 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2314 name);
2315 if (count > 1 && value <= list[count])
2316 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2317 "time value out of order for %s", name);
2318 list[count+1] = value;
2319 if (snext == NULL) break;
2320 s = snext + 1;
2321 while (isspace(*s)) s++;
2322 }
2323
2324 if (count > list[0] - 2)
2325 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2326 name);
2327 if (count > 0 && list[2] == 0) count = 0;
2328 list[1] = count;
2329 break;
2330 }
2331
2332 case opt_func:
2333 {
2334 void (*fn)() = ol->value;
2335 fn(name, s, 0);
2336 break;
2337 }
2338 }
2339
2340 return TRUE;
2341 }
2342
2343
2344
2345 /*************************************************
2346 * Print a time value *
2347 *************************************************/
2348
2349 /*
2350 Argument: a time value in seconds
2351 Returns: pointer to a fixed buffer containing the time as a string,
2352 in readconf_readtime() format
2353 */
2354
2355 uschar *
2356 readconf_printtime(int t)
2357 {
2358 int s, m, h, d, w;
2359 uschar *p = time_buffer;
2360
2361 if (t < 0)
2362 {
2363 *p++ = '-';
2364 t = -t;
2365 }
2366
2367 s = t % 60;
2368 t /= 60;
2369 m = t % 60;
2370 t /= 60;
2371 h = t % 24;
2372 t /= 24;
2373 d = t % 7;
2374 w = t/7;
2375
2376 if (w > 0) p += sprintf(CS p, "%dw", w);
2377 if (d > 0) p += sprintf(CS p, "%dd", d);
2378 if (h > 0) p += sprintf(CS p, "%dh", h);
2379 if (m > 0) p += sprintf(CS p, "%dm", m);
2380 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2381
2382 return time_buffer;
2383 }
2384
2385
2386
2387 /*************************************************
2388 * Print an individual option value *
2389 *************************************************/
2390
2391 /* This is used by the -bP option, so prints to the standard output.
2392 The entire options list is passed in as an argument, because some options come
2393 in pairs - typically uid/gid settings, which can either be explicit numerical
2394 values, or strings to be expanded later. If the numerical value is unset,
2395 search for "*expand_<name>" to see if there is a string equivalent.
2396
2397 Arguments:
2398 ol option entry, or NULL for an unknown option
2399 name option name
2400 options_block NULL for main configuration options; otherwise points to
2401 a driver block; if the option doesn't have opt_public
2402 set, then options_block->options_block is where the item
2403 resides.
2404 oltop points to the option list in which ol exists
2405 last one more than the offset of the last entry in optop
2406 no_labels do not show "foo = " at the start.
2407
2408 Returns: boolean success
2409 */
2410
2411 static BOOL
2412 print_ol(optionlist *ol, uschar *name, void *options_block,
2413 optionlist *oltop, int last, BOOL no_labels)
2414 {
2415 struct passwd *pw;
2416 struct group *gr;
2417 optionlist *ol2;
2418 void *value;
2419 uid_t *uidlist;
2420 gid_t *gidlist;
2421 uschar *s;
2422 uschar name2[64];
2423
2424 if (!ol)
2425 {
2426 printf("%s is not a known option\n", name);
2427 return FALSE;
2428 }
2429
2430 /* Non-admin callers cannot see options that have been flagged secure by the
2431 "hide" prefix. */
2432
2433 if (!f.admin_user && ol->type & opt_secure)
2434 {
2435 if (no_labels)
2436 printf("%s\n", hidden);
2437 else
2438 printf("%s = %s\n", name, hidden);
2439 return TRUE;
2440 }
2441
2442 /* Else show the value of the option */
2443
2444 value = ol->value;
2445 if (options_block)
2446 {
2447 if (!(ol->type & opt_public))
2448 options_block = (void *)(((driver_instance *)options_block)->options_block);
2449 value = (void *)(US options_block + (long int)value);
2450 }
2451
2452 switch(ol->type & opt_mask)
2453 {
2454 case opt_stringptr:
2455 case opt_rewrite: /* Show the text value */
2456 s = *(USS value);
2457 if (!no_labels) printf("%s = ", name);
2458 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2459 break;
2460
2461 case opt_int:
2462 if (!no_labels) printf("%s = ", name);
2463 printf("%d\n", *((int *)value));
2464 break;
2465
2466 case opt_mkint:
2467 {
2468 int x = *((int *)value);
2469 if (x != 0 && (x & 1023) == 0)
2470 {
2471 int c = 'K';
2472 x >>= 10;
2473 if ((x & 1023) == 0)
2474 {
2475 c = 'M';
2476 x >>= 10;
2477 }
2478 if (!no_labels) printf("%s = ", name);
2479 printf("%d%c\n", x, c);
2480 }
2481 else
2482 {
2483 if (!no_labels) printf("%s = ", name);
2484 printf("%d\n", x);
2485 }
2486 }
2487 break;
2488
2489 case opt_Kint:
2490 {
2491 int_eximarith_t x = *((int_eximarith_t *)value);
2492 if (!no_labels) printf("%s = ", name);
2493 if (x == 0) printf("0\n");
2494 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2495 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2496 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2497 else printf(PR_EXIM_ARITH "K\n", x);
2498 }
2499 break;
2500
2501 case opt_octint:
2502 if (!no_labels) printf("%s = ", name);
2503 printf("%#o\n", *((int *)value));
2504 break;
2505
2506 /* Can be negative only when "unset", in which case integer */
2507
2508 case opt_fixed:
2509 {
2510 int x = *((int *)value);
2511 int f = x % 1000;
2512 int d = 100;
2513 if (x < 0) printf("%s =\n", name); else
2514 {
2515 if (!no_labels) printf("%s = ", name);
2516 printf("%d.", x/1000);
2517 do
2518 {
2519 printf("%d", f/d);
2520 f %= d;
2521 d /= 10;
2522 }
2523 while (f != 0);
2524 printf("\n");
2525 }
2526 }
2527 break;
2528
2529 /* If the numerical value is unset, try for the string value */
2530
2531 case opt_expand_uid:
2532 if (! *get_set_flag(name, oltop, last, options_block))
2533 {
2534 sprintf(CS name2, "*expand_%.50s", name);
2535 if ((ol2 = find_option(name2, oltop, last)))
2536 {
2537 void *value2 = ol2->value;
2538 if (options_block)
2539 value2 = (void *)(US options_block + (long int)value2);
2540 s = *(USS value2);
2541 if (!no_labels) printf("%s = ", name);
2542 printf("%s\n", s ? string_printing(s) : US"");
2543 break;
2544 }
2545 }
2546
2547 /* Else fall through */
2548
2549 case opt_uid:
2550 if (!no_labels) printf("%s = ", name);
2551 if (! *get_set_flag(name, oltop, last, options_block))
2552 printf("\n");
2553 else
2554 if ((pw = getpwuid(*((uid_t *)value))))
2555 printf("%s\n", pw->pw_name);
2556 else
2557 printf("%ld\n", (long int)(*((uid_t *)value)));
2558 break;
2559
2560 /* If the numerical value is unset, try for the string value */
2561
2562 case opt_expand_gid:
2563 if (! *get_set_flag(name, oltop, last, options_block))
2564 {
2565 sprintf(CS name2, "*expand_%.50s", name);
2566 if ( (ol2 = find_option(name2, oltop, last))
2567 && (ol2->type & opt_mask) == opt_stringptr)
2568 {
2569 void *value2 = ol2->value;
2570 if (options_block)
2571 value2 = (void *)(US options_block + (long int)value2);
2572 s = *(USS value2);
2573 if (!no_labels) printf("%s = ", name);
2574 printf("%s\n", s ? string_printing(s) : US"");
2575 break;
2576 }
2577 }
2578
2579 /* Else fall through */
2580
2581 case opt_gid:
2582 if (!no_labels) printf("%s = ", name);
2583 if (! *get_set_flag(name, oltop, last, options_block))
2584 printf("\n");
2585 else
2586 if ((gr = getgrgid(*((int *)value))))
2587 printf("%s\n", gr->gr_name);
2588 else
2589 printf("%ld\n", (long int)(*((int *)value)));
2590 break;
2591
2592 case opt_uidlist:
2593 uidlist = *((uid_t **)value);
2594 if (!no_labels) printf("%s =", name);
2595 if (uidlist)
2596 {
2597 uschar sep = no_labels ? '\0' : ' ';
2598 for (int i = 1; i <= (int)(uidlist[0]); i++)
2599 {
2600 uschar *name = NULL;
2601 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2602 if (sep != '\0') printf("%c", sep);
2603 if (name) printf("%s", name);
2604 else printf("%ld", (long int)(uidlist[i]));
2605 sep = ':';
2606 }
2607 }
2608 printf("\n");
2609 break;
2610
2611 case opt_gidlist:
2612 gidlist = *((gid_t **)value);
2613 if (!no_labels) printf("%s =", name);
2614 if (gidlist)
2615 {
2616 uschar sep = no_labels ? '\0' : ' ';
2617 for (int i = 1; i <= (int)(gidlist[0]); i++)
2618 {
2619 uschar *name = NULL;
2620 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2621 if (sep != '\0') printf("%c", sep);
2622 if (name) printf("%s", name);
2623 else printf("%ld", (long int)(gidlist[i]));
2624 sep = ':';
2625 }
2626 }
2627 printf("\n");
2628 break;
2629
2630 case opt_time:
2631 if (!no_labels) printf("%s = ", name);
2632 printf("%s\n", readconf_printtime(*((int *)value)));
2633 break;
2634
2635 case opt_timelist:
2636 {
2637 int *list = (int *)value;
2638 if (!no_labels) printf("%s = ", name);
2639 for (int i = 0; i < list[1]; i++)
2640 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2641 printf("\n");
2642 }
2643 break;
2644
2645 case opt_bit:
2646 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2647 "" : "no_", name);
2648 break;
2649
2650 case opt_expand_bool:
2651 sprintf(CS name2, "*expand_%.50s", name);
2652 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2653 {
2654 void *value2 = ol2->value;
2655 if (options_block)
2656 value2 = (void *)(US options_block + (long int)value2);
2657 s = *(USS value2);
2658 if (s)
2659 {
2660 if (!no_labels) printf("%s = ", name);
2661 printf("%s\n", string_printing(s));
2662 break;
2663 }
2664 /* s == NULL => string not set; fall through */
2665 }
2666
2667 /* Fall through */
2668
2669 case opt_bool:
2670 case opt_bool_verify:
2671 case opt_bool_set:
2672 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2673 break;
2674
2675 case opt_func:
2676 {
2677 void (*fn)() = ol->value;
2678 fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2679 break;
2680 }
2681 }
2682 return TRUE;
2683 }
2684
2685
2686
2687 /*************************************************
2688 * Print value from main configuration *
2689 *************************************************/
2690
2691 /* This function, called as a result of encountering the -bP option,
2692 causes the value of any main configuration variable to be output if the
2693 second argument is NULL. There are some special values:
2694
2695 all print all main configuration options
2696 config_file print the name of the configuration file
2697 (configure_file will still work, for backward
2698 compatibility)
2699 routers print the routers' configurations
2700 transports print the transports' configuration
2701 authenticators print the authenticators' configuration
2702 macros print the macros' configuration
2703 router_list print a list of router names
2704 transport_list print a list of transport names
2705 authenticator_list print a list of authentication mechanism names
2706 macro_list print a list of macro names
2707 +name print a named list item
2708 local_scan print the local_scan options
2709 config print the configuration as it is parsed
2710 environment print the used execution environment
2711
2712 If the second argument is not NULL, it must be one of "router", "transport",
2713 "authenticator" or "macro" in which case the first argument identifies the
2714 driver whose options are to be printed.
2715
2716 Arguments:
2717 name option name if type == NULL; else driver name
2718 type NULL or driver type name, as described above
2719 no_labels avoid the "foo = " at the start of an item
2720
2721 Returns: Boolean success
2722 */
2723
2724 BOOL
2725 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2726 {
2727 BOOL names_only = FALSE;
2728 optionlist *ol2 = NULL;
2729 driver_instance *d = NULL;
2730 int size = 0;
2731
2732 if (!type)
2733 {
2734 if (*name == '+')
2735 {
2736 tree_node *t;
2737 BOOL found = FALSE;
2738 static uschar *types[] = { US"address", US"domain", US"host",
2739 US"localpart" };
2740 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2741 &hostlist_anchor, &localpartlist_anchor };
2742
2743 for (int i = 0; i < 4; i++)
2744 if ((t = tree_search(*(anchors[i]), name+1)))
2745 {
2746 found = TRUE;
2747 if (no_labels)
2748 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2749 else
2750 printf("%slist %s = %s\n", types[i], name+1,
2751 ((namedlist_block *)(t->data.ptr))->string);
2752 }
2753
2754 if (!found)
2755 printf("no address, domain, host, or local part list called \"%s\" "
2756 "exists\n", name+1);
2757
2758 return found;
2759 }
2760
2761 if ( Ustrcmp(name, "configure_file") == 0
2762 || Ustrcmp(name, "config_file") == 0)
2763 {
2764 printf("%s\n", CS config_main_filename);
2765 return TRUE;
2766 }
2767
2768 if (Ustrcmp(name, "all") == 0)
2769 {
2770 for (optionlist * ol = optionlist_config;
2771 ol < optionlist_config + nelem(optionlist_config); ol++)
2772 if (!(ol->type & opt_hidden))
2773 (void) print_ol(ol, US ol->name, NULL,
2774 optionlist_config, nelem(optionlist_config),
2775 no_labels);
2776 return TRUE;
2777 }
2778
2779 if (Ustrcmp(name, "local_scan") == 0)
2780 {
2781 #ifndef LOCAL_SCAN_HAS_OPTIONS
2782 printf("local_scan() options are not supported\n");
2783 return FALSE;
2784 #else
2785 for (optionlist * ol = local_scan_options;
2786 ol < local_scan_options + local_scan_options_count; ol++)
2787 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2788 local_scan_options_count, no_labels);
2789 return TRUE;
2790 #endif
2791 }
2792
2793 if (Ustrcmp(name, "config") == 0)
2794 {
2795 print_config(f.admin_user, no_labels);
2796 return TRUE;
2797 }
2798
2799 if (Ustrcmp(name, "routers") == 0)
2800 {
2801 type = US"router";
2802 name = NULL;
2803 }
2804 else if (Ustrcmp(name, "transports") == 0)
2805 {
2806 type = US"transport";
2807 name = NULL;
2808 }
2809 else if (Ustrcmp(name, "authenticators") == 0)
2810 {
2811 type = US"authenticator";
2812 name = NULL;
2813 }
2814 else if (Ustrcmp(name, "macros") == 0)
2815 {
2816 type = US"macro";
2817 name = NULL;
2818 }
2819 else if (Ustrcmp(name, "router_list") == 0)
2820 {
2821 type = US"router";
2822 name = NULL;
2823 names_only = TRUE;
2824 }
2825 else if (Ustrcmp(name, "transport_list") == 0)
2826 {
2827 type = US"transport";
2828 name = NULL;
2829 names_only = TRUE;
2830 }
2831 else if (Ustrcmp(name, "authenticator_list") == 0)
2832 {
2833 type = US"authenticator";
2834 name = NULL;
2835 names_only = TRUE;
2836 }
2837 else if (Ustrcmp(name, "macro_list") == 0)
2838 {
2839 type = US"macro";
2840 name = NULL;
2841 names_only = TRUE;
2842 }
2843 else if (Ustrcmp(name, "environment") == 0)
2844 {
2845 if (environ)
2846 {
2847 uschar ** p;
2848 for (p = USS environ; *p; p++) ;
2849 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2850
2851 for (p = USS environ; *p; p++)
2852 {
2853 uschar * q;
2854 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2855 puts(CS *p);
2856 }
2857 }
2858 return TRUE;
2859 }
2860
2861 else
2862 return print_ol(find_option(name,
2863 optionlist_config, nelem(optionlist_config)),
2864 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2865 }
2866
2867 /* Handle the options for a router or transport. Skip options that are flagged
2868 as hidden. Some of these are options with names starting with '*', used for
2869 internal alternative representations of other options (which the printing
2870 function will sort out). Others are synonyms kept for backward compatibility.
2871 */
2872
2873 if (Ustrcmp(type, "router") == 0)
2874 {
2875 d = (driver_instance *)routers;
2876 ol2 = optionlist_routers;
2877 size = optionlist_routers_size;
2878 }
2879 else if (Ustrcmp(type, "transport") == 0)
2880 {
2881 d = (driver_instance *)transports;
2882 ol2 = optionlist_transports;
2883 size = optionlist_transports_size;
2884 }
2885 else if (Ustrcmp(type, "authenticator") == 0)
2886 {
2887 d = (driver_instance *)auths;
2888 ol2 = optionlist_auths;
2889 size = optionlist_auths_size;
2890 }
2891
2892 else if (Ustrcmp(type, "macro") == 0)
2893 {
2894 /* People store passwords in macros and they were previously not available
2895 for printing. So we have an admin_users restriction. */
2896 if (!f.admin_user)
2897 {
2898 fprintf(stderr, "exim: permission denied\n");
2899 return FALSE;
2900 }
2901 for (macro_item * m = macros; m; m = m->next)
2902 if (!name || Ustrcmp(name, m->name) == 0)
2903 {
2904 if (names_only)
2905 printf("%s\n", CS m->name);
2906 else if (no_labels)
2907 printf("%s\n", CS m->replacement);
2908 else
2909 printf("%s=%s\n", CS m->name, CS m->replacement);
2910 if (name)
2911 return TRUE;
2912 }
2913 if (!name) return TRUE;
2914
2915 printf("%s %s not found\n", type, name);
2916 return FALSE;
2917 }
2918
2919 if (names_only)
2920 {
2921 for (; d; d = d->next) printf("%s\n", CS d->name);
2922 return TRUE;
2923 }
2924
2925 /* Either search for a given driver, or print all of them */
2926
2927 for (; d; d = d->next)
2928 {
2929 BOOL rc = FALSE;
2930 if (!name)
2931 printf("\n%s %s:\n", d->name, type);
2932 else if (Ustrcmp(d->name, name) != 0) continue;
2933
2934 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2935 if (!(ol->type & opt_hidden))
2936 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2937
2938 for (optionlist * ol = d->info->options;
2939 ol < d->info->options + *(d->info->options_count); ol++)
2940 if (!(ol->type & opt_hidden))
2941 rc |= print_ol(ol, US ol->name, d, d->info->options,
2942 *d->info->options_count, no_labels);
2943
2944 if (name) return rc;
2945 }
2946 if (!name) return TRUE;
2947
2948 printf("%s %s not found\n", type, name);
2949 return FALSE;
2950 }
2951
2952
2953
2954 /*************************************************
2955 * Read a named list item *
2956 *************************************************/
2957
2958 /* This function reads a name and a list (i.e. string). The name is used to
2959 save the list in a tree, sorted by its name. Each entry also has a number,
2960 which can be used for caching tests, but if the string contains any expansion
2961 items other than $key, the number is set negative to inhibit caching. This
2962 mechanism is used for domain, host, and address lists that are referenced by
2963 the "+name" syntax.
2964
2965 Arguments:
2966 anchorp points to the tree anchor
2967 numberp points to the current number for this tree
2968 max the maximum number permitted
2969 s the text of the option line, starting immediately after the name
2970 of the list type
2971 tname the name of the list type, for messages
2972
2973 Returns: nothing
2974 */
2975
2976 static void
2977 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2978 uschar *tname)
2979 {
2980 BOOL forcecache = FALSE;
2981 uschar *ss;
2982 tree_node *t;
2983 namedlist_block *nb = store_get(sizeof(namedlist_block));
2984
2985 if (Ustrncmp(s, "_cache", 6) == 0)
2986 {
2987 forcecache = TRUE;
2988 s += 6;
2989 }
2990
2991 if (!isspace(*s))
2992 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2993
2994 if (*numberp >= max)
2995 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2996 tname, max);
2997
2998 while (isspace(*s)) s++;
2999 ss = s;
3000 while (isalnum(*s) || *s == '_') s++;
3001 t = store_get(sizeof(tree_node) + s-ss);
3002 Ustrncpy(t->name, ss, s-ss);
3003 t->name[s-ss] = 0;
3004 while (isspace(*s)) s++;
3005
3006 if (!tree_insertnode(anchorp, t))
3007 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3008 "duplicate name \"%s\" for a named %s", t->name, tname);
3009
3010 t->data.ptr = nb;
3011 nb->number = *numberp;
3012 *numberp += 1;
3013
3014 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3015 "missing '=' after \"%s\"", t->name);
3016 while (isspace(*s)) s++;
3017 nb->string = read_string(s, t->name);
3018 nb->cache_data = NULL;
3019
3020 /* Check the string for any expansions; if any are found, mark this list
3021 uncacheable unless the user has explicited forced caching. */
3022
3023 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3024 }
3025
3026
3027
3028
3029 /*************************************************
3030 * Unpick data for a rate limit *
3031 *************************************************/
3032
3033 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3034 separate values.
3035
3036 Arguments:
3037 s string, in the form t,b,f,l
3038 where t is the threshold (integer)
3039 b is the initial delay (time)
3040 f is the multiplicative factor (fixed point)
3041 k is the maximum time (time)
3042 threshold where to store threshold
3043 base where to store base in milliseconds
3044 factor where to store factor in milliseconds
3045 limit where to store limit
3046
3047 Returns: nothing (panics on error)
3048 */
3049
3050 static void
3051 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3052 int *limit)
3053 {
3054 uschar bstring[16], lstring[16];
3055
3056 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3057 factor, lstring) == 4)
3058 {
3059 *base = readconf_readtime(bstring, 0, TRUE);
3060 *limit = readconf_readtime(lstring, 0, TRUE);
3061 if (*base >= 0 && *limit >= 0) return;
3062 }
3063 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3064 }
3065
3066
3067
3068
3069 /*************************************************
3070 * Drop privs for checking TLS config *
3071 *************************************************/
3072
3073 /* We want to validate TLS options during readconf, but do not want to be
3074 root when we call into the TLS library, in case of library linkage errors
3075 which cause segfaults; before this check, those were always done as the Exim
3076 runtime user and it makes sense to continue with that.
3077
3078 Assumes: tls_require_ciphers has been set, if it will be
3079 exim_user has been set, if it will be
3080 exim_group has been set, if it will be
3081
3082 Returns: bool for "okay"; false will cause caller to immediately exit.
3083 */
3084
3085 #ifdef SUPPORT_TLS
3086 static BOOL
3087 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3088 {
3089 const uschar *errmsg;
3090 pid_t pid;
3091 int rc, status;
3092 void (*oldsignal)(int);
3093
3094 /* If TLS will never be used, no point checking ciphers */
3095
3096 if ( !tls_advertise_hosts
3097 || !*tls_advertise_hosts
3098 || Ustrcmp(tls_advertise_hosts, ":") == 0
3099 )
3100 return TRUE;
3101 else if (!nowarn && !tls_certificate)
3102 log_write(0, LOG_MAIN,
3103 "Warning: No server certificate defined; will use a selfsigned one.\n"
3104 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3105
3106 oldsignal = signal(SIGCHLD, SIG_DFL);
3107
3108 fflush(NULL);
3109 if ((pid = fork()) < 0)
3110 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3111
3112 if (pid == 0)
3113 {
3114 /* in some modes, will have dropped privilege already */
3115 if (!geteuid())
3116 exim_setugid(exim_uid, exim_gid, FALSE,
3117 US"calling tls_validate_require_cipher");
3118
3119 if ((errmsg = tls_validate_require_cipher()))
3120 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3121 "tls_require_ciphers invalid: %s", errmsg);
3122 fflush(NULL);
3123 _exit(0);
3124 }
3125
3126 do {
3127 rc = waitpid(pid, &status, 0);
3128 } while (rc < 0 && errno == EINTR);
3129
3130 DEBUG(D_tls)
3131 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3132 (int)pid, status);
3133
3134 signal(SIGCHLD, oldsignal);
3135
3136 return status == 0;
3137 }
3138 #endif /* SUPPORT_TLS */
3139
3140
3141
3142
3143 /*************************************************
3144 * Read main configuration options *
3145 *************************************************/
3146
3147 /* This function is the first to be called for configuration reading. It
3148 opens the configuration file and reads general configuration settings until
3149 it reaches the end of the configuration section. The file is then left open so
3150 that the remaining configuration data can subsequently be read if needed for
3151 this run of Exim.
3152
3153 The configuration file must be owned either by root or exim, and be writeable
3154 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3155 in the config file, so the test is done on the compiled in values. A slight
3156 anomaly, to be carefully documented.
3157
3158 The name of the configuration file is taken from a list that is included in the
3159 binary of Exim. It can be altered from the command line, but if that is done,
3160 root privilege is immediately withdrawn unless the caller is root or exim.
3161 The first file on the list that exists is used.
3162
3163 For use on multiple systems that share file systems, first look for a
3164 configuration file whose name has the current node name on the end. If that is
3165 not found, try the generic name. For really contorted configurations, that run
3166 multiple Exims with different uid settings, first try adding the effective uid
3167 before the node name. These complications are going to waste resources on most
3168 systems. Therefore they are available only when requested by compile-time
3169 options. */
3170
3171 void
3172 readconf_main(BOOL nowarn)
3173 {
3174 int sep = 0;
3175 struct stat statbuf;
3176 uschar *s, *filename;
3177 const uschar *list = config_main_filelist;
3178
3179 /* Loop through the possible file names */
3180
3181 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3182 {
3183
3184 /* Cut out all the fancy processing unless specifically wanted */
3185
3186 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3187 uschar *suffix = filename + Ustrlen(filename);
3188
3189 /* Try for the node-specific file if a node name exists */
3190
3191 #ifdef CONFIGURE_FILE_USE_NODE
3192 struct utsname uts;
3193 if (uname(&uts) >= 0)
3194 {
3195 #ifdef CONFIGURE_FILE_USE_EUID
3196 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3197 config_file = Ufopen(filename, "rb");
3198 if (config_file == NULL)
3199 #endif /* CONFIGURE_FILE_USE_EUID */
3200 {
3201 sprintf(CS suffix, ".%.256s", uts.nodename);
3202 config_file = Ufopen(filename, "rb");
3203 }
3204 }
3205 #endif /* CONFIGURE_FILE_USE_NODE */
3206
3207 /* Otherwise, try the generic name, possibly with the euid added */
3208
3209 #ifdef CONFIGURE_FILE_USE_EUID
3210 if (config_file == NULL)
3211 {
3212 sprintf(CS suffix, ".%ld", (long int)original_euid);
3213 config_file = Ufopen(filename, "rb");
3214 }
3215 #endif /* CONFIGURE_FILE_USE_EUID */
3216
3217 /* Finally, try the unadorned name */
3218
3219 if (config_file == NULL)
3220 {
3221 *suffix = 0;
3222 config_file = Ufopen(filename, "rb");
3223 }
3224 #else /* if neither defined */
3225
3226 /* This is the common case when the fancy processing is not included. */
3227
3228 config_file = Ufopen(filename, "rb");
3229 #endif
3230
3231 /* If the file does not exist, continue to try any others. For any other
3232 error, break out (and die). */
3233
3234 if (config_file != NULL || errno != ENOENT) break;
3235 }
3236
3237 /* On success, save the name for verification; config_filename is used when
3238 logging configuration errors (it changes for .included files) whereas
3239 config_main_filename is the name shown by -bP. Failure to open a configuration
3240 file is a serious disaster. */
3241
3242 if (config_file)
3243 {
3244 uschar *last_slash = Ustrrchr(filename, '/');
3245 config_filename = config_main_filename = string_copy(filename);
3246
3247 /* The config_main_directory we need for the $config_dir expansion.
3248 config_main_filename we need for $config_file expansion.
3249 And config_dir is the directory of the current configuration, used for
3250 relative .includes. We do need to know it's name, as we change our working
3251 directory later. */
3252
3253 if (filename[0] == '/')
3254 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3255 else
3256 {
3257 /* relative configuration file name: working dir + / + basename(filename) */
3258
3259 uschar buf[PATH_MAX];
3260 gstring * g;
3261
3262 if (os_getcwd(buf, PATH_MAX) == NULL)
3263 {
3264 perror("exim: getcwd");
3265 exit(EXIT_FAILURE);
3266 }
3267 g = string_cat(NULL, buf);
3268
3269 /* If the dir does not end with a "/", append one */
3270 if (g->s[g->ptr-1] != '/')
3271 g = string_catn(g, US"/", 1);
3272
3273 /* If the config file contains a "/", extract the directory part */
3274 if (last_slash)
3275 g = string_catn(g, filename, last_slash - filename);
3276
3277 config_main_directory = string_from_gstring(g);
3278 }
3279 config_directory = config_main_directory;
3280 }
3281 else
3282 {
3283 if (filename == NULL)
3284 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3285 "%s", config_main_filelist);
3286 else
3287 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3288 "configuration file %s", filename));
3289 }
3290
3291 /* Now, once we found and opened our configuration file, we change the directory
3292 to a safe place. Later we change to $spool_directory. */
3293
3294 if (Uchdir("/") < 0)
3295 {
3296 perror("exim: chdir `/': ");
3297 exit(EXIT_FAILURE);
3298 }
3299
3300 /* Check the status of the file we have opened, if we have retained root
3301 privileges and the file isn't /dev/null (which *should* be 0666). */
3302
3303 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3304 {
3305 if (fstat(fileno(config_file), &statbuf) != 0)
3306 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3307 big_buffer);
3308
3309 if ((statbuf.st_uid != root_uid /* owner not root */
3310 #ifdef CONFIGURE_OWNER
3311 && statbuf.st_uid != config_uid /* owner not the special one */
3312 #endif
3313 ) || /* or */
3314 (statbuf.st_gid != root_gid /* group not root & */
3315 #ifdef CONFIGURE_GROUP
3316 && statbuf.st_gid != config_gid /* group not the special one */
3317 #endif
3318 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3319 /* or */
3320 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3321
3322 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3323 "wrong owner, group, or mode", big_buffer);
3324 }
3325
3326 /* Process the main configuration settings. They all begin with a lower case
3327 letter. If we see something starting with an upper case letter, it is taken as
3328 a macro definition. */
3329
3330 while ((s = get_config_line()))
3331 {
3332 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3333 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3334 "found unexpected BOM (Byte Order Mark)");
3335
3336 if (isupper(s[0]))
3337 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3338
3339 else if (Ustrncmp(s, "domainlist", 10) == 0)
3340 read_named_list(&domainlist_anchor, &domainlist_count,
3341 MAX_NAMED_LIST, s+10, US"domain list");
3342
3343 else if (Ustrncmp(s, "hostlist", 8) == 0)
3344 read_named_list(&hostlist_anchor, &hostlist_count,
3345 MAX_NAMED_LIST, s+8, US"host list");
3346
3347 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3348 read_named_list(&addresslist_anchor, &addresslist_count,
3349 MAX_NAMED_LIST, s+11, US"address list");
3350
3351 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3352 read_named_list(&localpartlist_anchor, &localpartlist_count,
3353 MAX_NAMED_LIST, s+13, US"local part list");
3354
3355 else
3356 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3357 NULL, US"main option \"%s\" unknown");
3358 }
3359
3360
3361 /* If local_sender_retain is set, local_from_check must be unset. */
3362
3363 if (local_sender_retain && local_from_check)
3364 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3365 "local_sender_retain are set; this combination is not allowed");
3366
3367 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3368 wanted. */
3369
3370 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3371
3372 /* The max retry interval must not be greater than 24 hours. */
3373
3374 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3375
3376 /* remote_max_parallel must be > 0 */
3377
3378 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3379
3380 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3381 start of a new SMTP message. */
3382
3383 freeze_tell_config = freeze_tell;
3384
3385 /* The primary host name may be required for expansion of spool_directory
3386 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3387 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3388 canonize it. Some people like upper case letters in their host names, so we
3389 don't force the case. */
3390
3391 if (primary_hostname == NULL)
3392 {
3393 const uschar *hostname;
3394 struct utsname uts;
3395 if (uname(&uts) < 0)
3396 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3397 hostname = US uts.nodename;
3398
3399 if (Ustrchr(hostname, '.') == NULL)
3400 {
3401 int af = AF_INET;
3402 struct hostent *hostdata;
3403
3404 #if HAVE_IPV6
3405 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3406 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3407 MCL_DOMAIN, TRUE, NULL) != OK))
3408 af = AF_INET6;
3409 #else
3410 af = AF_INET;
3411 #endif
3412
3413 for (;;)
3414 {
3415 #if HAVE_IPV6
3416 #if HAVE_GETIPNODEBYNAME
3417 int error_num;
3418 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3419 #else
3420 hostdata = gethostbyname2(CS hostname, af);
3421 #endif
3422 #else
3423 hostdata = gethostbyname(CS hostname);
3424 #endif
3425
3426 if (hostdata != NULL)
3427 {
3428 hostname = US hostdata->h_name;
3429 break;
3430 }
3431
3432 if (af == AF_INET) break;
3433 af = AF_INET;
3434 }
3435 }
3436
3437 primary_hostname = string_copy(hostname);
3438 }
3439
3440 /* Set up default value for smtp_active_hostname */
3441
3442 smtp_active_hostname = primary_hostname;
3443
3444 /* If spool_directory wasn't set in the build-time configuration, it must have
3445 got set above. Of course, writing to the log may not work if log_file_path is
3446 not set, but it will at least get to syslog or somewhere, with any luck. */
3447
3448 if (*spool_directory == 0)
3449 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3450 "proceed");
3451
3452 /* Expand the spool directory name; it may, for example, contain the primary
3453 host name. Same comment about failure. */
3454
3455 s = expand_string(spool_directory);
3456 if (s == NULL)
3457 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3458 "\"%s\": %s", spool_directory, expand_string_message);
3459 spool_directory = s;
3460
3461 /* Expand log_file_path, which must contain "%s" in any component that isn't
3462 the null string or "syslog". It is also allowed to contain one instance of %D
3463 or %M. However, it must NOT contain % followed by anything else. */
3464
3465 if (*log_file_path != 0)
3466 {
3467 const uschar *ss, *sss;
3468 int sep = ':'; /* Fixed for log file path */
3469 s = expand_string(log_file_path);
3470 if (s == NULL)
3471 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3472 "\"%s\": %s", log_file_path, expand_string_message);
3473
3474 ss = s;
3475 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3476 {
3477 uschar *t;
3478 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3479 t = Ustrstr(sss, "%s");
3480 if (t == NULL)
3481 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3482 "contain \"%%s\"", sss);
3483 *t = 'X';
3484 t = Ustrchr(sss, '%');
3485 if (t != NULL)
3486 {
3487 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3488 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3489 "unexpected \"%%\" character", s);
3490 }
3491 }
3492
3493 log_file_path = s;
3494 }
3495
3496 /* Interpret syslog_facility into an integer argument for 'ident' param to
3497 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3498 leading "log_". */
3499
3500 if (syslog_facility_str)
3501 {
3502 int i;
3503 uschar *s = syslog_facility_str;
3504
3505 if ((Ustrlen(syslog_facility_str) >= 4) &&
3506 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3507 s += 4;
3508
3509 for (i = 0; i < syslog_list_size; i++)
3510 if (strcmpic(s, syslog_list[i].name) == 0)
3511 {
3512 syslog_facility = syslog_list[i].value;
3513 break;
3514 }
3515
3516 if (i >= syslog_list_size)
3517 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3518 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3519 }
3520
3521 /* Expand pid_file_path */
3522
3523 if (*pid_file_path != 0)
3524 {
3525 if (!(s = expand_string(pid_file_path)))
3526 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3527 "\"%s\": %s", pid_file_path, expand_string_message);
3528 pid_file_path = s;
3529 }
3530
3531 /* Set default value of process_log_path */
3532
3533 if (!process_log_path || *process_log_path =='\0')
3534 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3535
3536 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3537 message. */
3538
3539 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3540
3541 /* Unpick the SMTP rate limiting options, if set */
3542
3543 if (smtp_ratelimit_mail)
3544 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3545 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3546
3547 if (smtp_ratelimit_rcpt)
3548 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3549 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3550
3551 /* The qualify domains default to the primary host name */
3552
3553 if (!qualify_domain_sender)
3554 qualify_domain_sender = primary_hostname;
3555 if (!qualify_domain_recipient)
3556 qualify_domain_recipient = qualify_domain_sender;
3557
3558 /* Setting system_filter_user in the configuration sets the gid as well if a
3559 name is given, but a numerical value does not. */
3560
3561 if (system_filter_uid_set && !system_filter_gid_set)
3562 {
3563 struct passwd *pw = getpwuid(system_filter_uid);
3564 if (!pw)
3565 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3566 (long int)system_filter_uid);
3567 system_filter_gid = pw->pw_gid;
3568 system_filter_gid_set = TRUE;
3569 }
3570
3571 /* If the errors_reply_to field is set, check that it is syntactically valid
3572 and ensure it contains a domain. */
3573
3574 if (errors_reply_to)
3575 {
3576 uschar *errmess;
3577 int start, end, domain;
3578 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3579 &start, &end, &domain, FALSE);
3580
3581 if (!recipient)
3582 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3583 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3584
3585 if (domain == 0)
3586 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3587 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3588 }
3589
3590 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3591 smtp_accept_max must also be set. */
3592
3593 if (smtp_accept_max == 0 &&
3594 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3595 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3596 "smtp_accept_max must be set if smtp_accept_queue or "
3597 "smtp_accept_max_per_host is set");
3598
3599 /* Set up the host number if anything is specified. It is an expanded string
3600 so that it can be computed from the host name, for example. We do this last
3601 so as to ensure that everything else is set up before the expansion. */
3602
3603 if (host_number_string)
3604 {
3605 long int n;
3606 uschar *end;
3607 uschar *s = expand_string(host_number_string);
3608
3609 if (!s)
3610 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3611 "failed to expand localhost_number \"%s\": %s",
3612 host_number_string, expand_string_message);
3613 n = Ustrtol(s, &end, 0);
3614 while (isspace(*end)) end++;
3615 if (*end != 0)
3616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3617 "localhost_number value is not a number: %s", s);
3618 if (n > LOCALHOST_MAX)
3619 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3620 "localhost_number is greater than the maximum allowed value (%d)",
3621 LOCALHOST_MAX);
3622 host_number = n;
3623 }
3624
3625 #ifdef SUPPORT_TLS
3626 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3627
3628 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3629 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3630 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3631 tls_verify_hosts ? "" : "try_");
3632
3633 /* This also checks that the library linkage is working and we can call
3634 routines in it, so call even if tls_require_ciphers is unset */
3635 if (!tls_dropprivs_validate_require_cipher(nowarn))
3636 exit(1);
3637
3638 /* Magic number: at time of writing, 1024 has been the long-standing value
3639 used by so many clients, and what Exim used to use always, that it makes
3640 sense to just min-clamp this max-clamp at that. */
3641 if (tls_dh_max_bits < 1024)
3642 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3643 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3644
3645 /* If openssl_options is set, validate it */
3646 if (openssl_options)
3647 {
3648 # ifdef USE_GNUTLS
3649 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3650 "openssl_options is set but we're using GnuTLS");
3651 # else
3652 long dummy;
3653 if (!tls_openssl_options_parse(openssl_options, &dummy))
3654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3655 "openssl_options parse error: %s", openssl_options);
3656 # endif
3657 }
3658 #endif /*SUPPORT_TLS*/
3659
3660 if (!nowarn && !keep_environment && environ && *environ)
3661 log_write(0, LOG_MAIN,
3662 "Warning: purging the environment.\n"
3663 " Suggested action: use keep_environment.");
3664 }
3665
3666
3667
3668 /*************************************************
3669 * Initialize one driver *
3670 *************************************************/
3671
3672 /* This is called once the driver's generic options, if any, have been read.
3673 We can now find the driver, set up defaults for the private options, and
3674 unset any "set" bits in the private options table (which might have been
3675 set by another incarnation of the same driver).
3676
3677 Arguments:
3678 d pointer to driver instance block, with generic
3679 options filled in
3680 drivers_available vector of available drivers
3681 size_of_info size of each block in drivers_available
3682 class class of driver, for error message
3683
3684 Returns: pointer to the driver info block
3685 */
3686
3687 static driver_info *
3688 init_driver(driver_instance *d, driver_info *drivers_available,
3689 int size_of_info, uschar *class)
3690 {
3691 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3692 dd = (driver_info *)((US dd) + size_of_info))
3693 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3694 {
3695 int len = dd->options_len;
3696 d->info = dd;
3697 d->options_block = store_get(len);
3698 memcpy(d->options_block, dd->options_block, len);
3699 for (int i = 0; i < *(dd->options_count); i++)
3700 dd->options[i].type &= ~opt_set;
3701 return dd;
3702 }
3703
3704 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3705 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3706
3707 return NULL; /* never obeyed */
3708 }
3709
3710
3711
3712
3713 /*************************************************
3714 * Initialize driver list *
3715 *************************************************/
3716
3717 /* This function is called for routers, transports, and authentication
3718 mechanisms. It reads the data from the current point in the configuration file
3719 up to the end of the section, and sets up a chain of instance blocks according
3720 to the file's contents. The file will already have been opened by a call to
3721 readconf_main, and must be left open for subsequent reading of further data.
3722
3723 Any errors cause a panic crash. Note that the blocks with names driver_info and
3724 driver_instance must map the first portions of all the _info and _instance
3725 blocks for this shared code to work.
3726
3727 Arguments:
3728 class "router", "transport", or "authenticator"
3729 anchor &routers, &transports, &auths
3730 drivers_available available drivers
3731 size_of_info size of each info block
3732 instance_default points to default data for an instance
3733 instance_size size of instance block
3734 driver_optionlist generic option list
3735 driver_optionlist_count count of generic option list
3736
3737 Returns: nothing
3738 */
3739
3740 void
3741 readconf_driver_init(
3742 uschar *class,
3743 driver_instance **anchor,
3744 driver_info *drivers_available,
3745 int size_of_info,
3746 void *instance_default,
3747 int instance_size,
3748 optionlist *driver_optionlist,
3749 int driver_optionlist_count)
3750 {
3751 driver_instance **p = anchor;
3752 driver_instance *d = NULL;
3753 uschar *buffer;
3754
3755 while ((buffer = get_config_line()) != NULL)
3756 {
3757 uschar name[64];
3758 uschar *s;
3759
3760 /* Read the first name on the line and test for the start of a new driver. A
3761 macro definition indicates the end of the previous driver. If this isn't the
3762 start of a new driver, the line will be re-read. */
3763
3764 s = readconf_readname(name, sizeof(name), buffer);
3765
3766 /* Handle macro definition, first finishing off the initialization of the
3767 previous driver, if any. */
3768
3769 if (isupper(*name) && *s == '=')
3770 {
3771 if (d)
3772 {
3773 if (!d->driver_name)
3774 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3775 "no driver defined for %s \"%s\"", class, d->name);
3776 (d->info->init)(d);
3777 d = NULL;
3778 }
3779 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3780 continue;
3781 }
3782
3783 /* If the line starts with a name terminated by a colon, we are at the
3784 start of the definition of a new driver. The rest of the line must be
3785 blank. */
3786
3787 if (*s++ == ':')
3788 {
3789 /* Finish off initializing the previous driver. */
3790
3791 if (d)
3792 {
3793 if (!d->driver_name)
3794 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3795 "no driver defined for %s \"%s\"", class, d->name);
3796 (d->info->init)(d);
3797 }
3798
3799 /* Check that we haven't already got a driver of this name */
3800
3801 for (d = *anchor; d; d = d->next)
3802 if (Ustrcmp(name, d->name) == 0)
3803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3804 "there are two %ss called \"%s\"", class, name);
3805
3806 /* Set up a new driver instance data block on the chain, with
3807 its default values installed. */
3808
3809 d = store_get(instance_size);
3810 memcpy(d, instance_default, instance_size);
3811 *p = d;
3812 p = &d->next;
3813 d->name = string_copy(name);
3814
3815 /* Clear out the "set" bits in the