cac8fe5c2e81a475663d2a30d50b2e412927716d
[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 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
153 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
154 { "finduser_retries", opt_int, &finduser_retries },
155 { "freeze_tell", opt_stringptr, &freeze_tell },
156 { "gecos_name", opt_stringptr, &gecos_name },
157 { "gecos_pattern", opt_stringptr, &gecos_pattern },
158 #ifdef SUPPORT_TLS
159 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
160 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
161 #endif
162 { "header_line_maxsize", opt_int, &header_line_maxsize },
163 { "header_maxsize", opt_int, &header_maxsize },
164 { "headers_charset", opt_stringptr, &headers_charset },
165 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
166 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
167 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
168 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
169 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
170 { "hold_domains", opt_stringptr, &hold_domains },
171 { "host_lookup", opt_stringptr, &host_lookup },
172 { "host_lookup_order", opt_stringptr, &host_lookup_order },
173 { "host_reject_connection", opt_stringptr, &host_reject_connection },
174 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
175 #ifdef SUPPORT_PROXY
176 { "hosts_proxy", opt_stringptr, &hosts_proxy },
177 #endif
178 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
179 #ifdef LOOKUP_IBASE
180 { "ibase_servers", opt_stringptr, &ibase_servers },
181 #endif
182 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
183 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
184 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
185 { "keep_environment", opt_stringptr, &keep_environment },
186 { "keep_malformed", opt_time, &keep_malformed },
187 #ifdef LOOKUP_LDAP
188 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
189 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
190 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
191 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
192 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
193 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
194 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
195 { "ldap_start_tls", opt_bool, &eldap_start_tls },
196 { "ldap_version", opt_int, &eldap_version },
197 #endif
198 { "local_from_check", opt_bool, &local_from_check },
199 { "local_from_prefix", opt_stringptr, &local_from_prefix },
200 { "local_from_suffix", opt_stringptr, &local_from_suffix },
201 { "local_interfaces", opt_stringptr, &local_interfaces },
202 #ifdef HAVE_LOCAL_SCAN
203 { "local_scan_timeout", opt_time, &local_scan_timeout },
204 #endif
205 { "local_sender_retain", opt_bool, &local_sender_retain },
206 { "localhost_number", opt_stringptr, &host_number_string },
207 { "log_file_path", opt_stringptr, &log_file_path },
208 { "log_selector", opt_stringptr, &log_selector_string },
209 { "log_timezone", opt_bool, &log_timezone },
210 { "lookup_open_max", opt_int, &lookup_open_max },
211 { "max_username_length", opt_int, &max_username_length },
212 { "message_body_newlines", opt_bool, &message_body_newlines },
213 { "message_body_visible", opt_mkint, &message_body_visible },
214 { "message_id_header_domain", opt_stringptr, &message_id_domain },
215 { "message_id_header_text", opt_stringptr, &message_id_text },
216 { "message_logs", opt_bool, &message_logs },
217 { "message_size_limit", opt_stringptr, &message_size_limit },
218 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
219 { "move_frozen_messages", opt_bool, &move_frozen_messages },
220 #endif
221 { "mua_wrapper", opt_bool, &mua_wrapper },
222 #ifdef LOOKUP_MYSQL
223 { "mysql_servers", opt_stringptr, &mysql_servers },
224 #endif
225 { "never_users", opt_uidlist, &never_users },
226 #ifdef SUPPORT_TLS
227 { "openssl_options", opt_stringptr, &openssl_options },
228 #endif
229 #ifdef LOOKUP_ORACLE
230 { "oracle_servers", opt_stringptr, &oracle_servers },
231 #endif
232 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
233 #ifdef EXIM_PERL
234 { "perl_at_start", opt_bool, &opt_perl_at_start },
235 { "perl_startup", opt_stringptr, &opt_perl_startup },
236 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
237 #endif
238 #ifdef LOOKUP_PGSQL
239 { "pgsql_servers", opt_stringptr, &pgsql_servers },
240 #endif
241 { "pid_file_path", opt_stringptr, &pid_file_path },
242 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
243 #ifdef EXPERIMENTAL_PIPE_CONNECT
244 { "pipelining_connect_advertise_hosts", opt_stringptr,
245 &pipe_connect_advertise_hosts },
246 #endif
247 #ifndef DISABLE_PRDR
248 { "prdr_enable", opt_bool, &prdr_enable },
249 #endif
250 { "preserve_message_logs", opt_bool, &preserve_message_logs },
251 { "primary_hostname", opt_stringptr, &primary_hostname },
252 { "print_topbitchars", opt_bool, &print_topbitchars },
253 { "process_log_path", opt_stringptr, &process_log_path },
254 { "prod_requires_admin", opt_bool, &prod_requires_admin },
255 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
256 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
257 { "queue_domains", opt_stringptr, &queue_domains },
258 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
259 { "queue_only", opt_bool, &queue_only },
260 { "queue_only_file", opt_stringptr, &queue_only_file },
261 { "queue_only_load", opt_fixed, &queue_only_load },
262 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
263 { "queue_only_override", opt_bool, &queue_only_override },
264 { "queue_run_in_order", opt_bool, &queue_run_in_order },
265 { "queue_run_max", opt_stringptr, &queue_run_max },
266 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
267 { "receive_timeout", opt_time, &receive_timeout },
268 { "received_header_text", opt_stringptr, &received_header_text },
269 { "received_headers_max", opt_int, &received_headers_max },
270 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
271 { "recipients_max", opt_int, &recipients_max },
272 { "recipients_max_reject", opt_bool, &recipients_max_reject },
273 #ifdef LOOKUP_REDIS
274 { "redis_servers", opt_stringptr, &redis_servers },
275 #endif
276 { "remote_max_parallel", opt_int, &remote_max_parallel },
277 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
278 { "retry_data_expire", opt_time, &retry_data_expire },
279 { "retry_interval_max", opt_time, &retry_interval_max },
280 { "return_path_remove", opt_bool, &return_path_remove },
281 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
282 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
283 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
284 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
285 { "slow_lookup_log", opt_int, &slow_lookup_log },
286 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
287 { "smtp_accept_max", opt_int, &smtp_accept_max },
288 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
289 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
290 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
291 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
292 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
293 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
294 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
295 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
296 { "smtp_banner", opt_stringptr, &smtp_banner },
297 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
298 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
299 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
300 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
301 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
302 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
303 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
304 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
305 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
306 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
307 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
308 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
309 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
310 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
311 #ifdef SUPPORT_I18N
312 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
313 #endif
314 #ifdef WITH_CONTENT_SCAN
315 { "spamd_address", opt_stringptr, &spamd_address },
316 #endif
317 #ifdef SUPPORT_SPF
318 { "spf_guess", opt_stringptr, &spf_guess },
319 #endif
320 { "split_spool_directory", opt_bool, &split_spool_directory },
321 { "spool_directory", opt_stringptr, &spool_directory },
322 { "spool_wireformat", opt_bool, &spool_wireformat },
323 #ifdef LOOKUP_SQLITE
324 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
325 #endif
326 #ifdef EXPERIMENTAL_SRS
327 { "srs_config", opt_stringptr, &srs_config },
328 { "srs_hashlength", opt_int, &srs_hashlength },
329 { "srs_hashmin", opt_int, &srs_hashmin },
330 { "srs_maxage", opt_int, &srs_maxage },
331 { "srs_secrets", opt_stringptr, &srs_secrets },
332 { "srs_usehash", opt_bool, &srs_usehash },
333 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
334 #endif
335 { "strict_acl_vars", opt_bool, &strict_acl_vars },
336 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
337 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
338 { "syslog_duplication", opt_bool, &syslog_duplication },
339 { "syslog_facility", opt_stringptr, &syslog_facility_str },
340 { "syslog_pid", opt_bool, &syslog_pid },
341 { "syslog_processname", opt_stringptr, &syslog_processname },
342 { "syslog_timestamp", opt_bool, &syslog_timestamp },
343 { "system_filter", opt_stringptr, &system_filter },
344 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
345 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
346 { "system_filter_group", opt_gid, &system_filter_gid },
347 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
348 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
349 { "system_filter_user", opt_uid, &system_filter_uid },
350 { "tcp_nodelay", opt_bool, &tcp_nodelay },
351 #ifdef USE_TCP_WRAPPERS
352 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
353 #endif
354 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
355 { "timezone", opt_stringptr, &timezone_string },
356 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
357 #ifdef SUPPORT_TLS
358 { "tls_certificate", opt_stringptr, &tls_certificate },
359 { "tls_crl", opt_stringptr, &tls_crl },
360 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
361 { "tls_dhparam", opt_stringptr, &tls_dhparam },
362 { "tls_eccurve", opt_stringptr, &tls_eccurve },
363 # ifndef DISABLE_OCSP
364 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
365 # endif
366 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
367 { "tls_privatekey", opt_stringptr, &tls_privatekey },
368 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
369 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
370 # ifdef EXPERIMENTAL_TLS_RESUME
371 { "tls_resumption_hosts", opt_stringptr, &tls_resumption_hosts },
372 # endif
373 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
374 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
375 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
376 #endif
377 { "trusted_groups", opt_gidlist, &trusted_groups },
378 { "trusted_users", opt_uidlist, &trusted_users },
379 { "unknown_login", opt_stringptr, &unknown_login },
380 { "unknown_username", opt_stringptr, &unknown_username },
381 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
382 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
383 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
384 { "warn_message_file", opt_stringptr, &warn_message_file },
385 { "write_rejectlog", opt_bool, &write_rejectlog }
386 };
387
388 #ifndef MACRO_PREDEF
389 static int optionlist_config_size = nelem(optionlist_config);
390 #endif
391
392
393 #ifdef MACRO_PREDEF
394
395 static void
396 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
397
398 void
399 options_main(void)
400 {
401 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
402 }
403
404 void
405 options_auths(void)
406 {
407 uschar buf[64];
408
409 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
410
411 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
412 {
413 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
414 builtin_macro_create(buf);
415 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
416 }
417 }
418
419 void
420 options_logging(void)
421 {
422 uschar buf[64];
423
424 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
425 {
426 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
427 builtin_macro_create(buf);
428 }
429 }
430
431
432 #else /*!MACRO_PREDEF*/
433
434 extern char **environ;
435
436 static void save_config_line(const uschar* line);
437 static void save_config_position(const uschar *file, int line);
438 static void print_config(BOOL admin, BOOL terse);
439
440
441 #define CSTATE_STACK_SIZE 10
442
443 const uschar *config_directory = NULL;
444
445
446 /* Structure for chain (stack) of .included files */
447
448 typedef struct config_file_item {
449 struct config_file_item *next;
450 const uschar *filename;
451 const uschar *directory;
452 FILE *file;
453 int lineno;
454 } config_file_item;
455
456 /* Structure for chain of configuration lines (-bP config) */
457
458 typedef struct config_line_item {
459 struct config_line_item *next;
460 uschar *line;
461 } config_line_item;
462
463 static config_line_item* config_lines;
464
465 /* Structure of table of conditional words and their state transitions */
466
467 typedef struct cond_item {
468 uschar *name;
469 int namelen;
470 int action1;
471 int action2;
472 int pushpop;
473 } cond_item;
474
475 /* Structure of table of syslog facility names and values */
476
477 typedef struct syslog_fac_item {
478 uschar *name;
479 int value;
480 } syslog_fac_item;
481
482 /* constants */
483 static const char * const hidden = "<value not displayable>";
484
485 /* Static variables */
486
487 static config_file_item *config_file_stack = NULL; /* For includes */
488
489 static uschar *syslog_facility_str = NULL;
490 static uschar next_section[24];
491 static uschar time_buffer[24];
492
493 /* State variables for conditional loading (.ifdef / .else / .endif) */
494
495 static int cstate = 0;
496 static int cstate_stack_ptr = -1;
497 static int cstate_stack[CSTATE_STACK_SIZE];
498
499 /* Table of state transitions for handling conditional inclusions. There are
500 four possible state transitions:
501
502 .ifdef true
503 .ifdef false
504 .elifdef true (or .else)
505 .elifdef false
506
507 .endif just causes the previous cstate to be popped off the stack */
508
509 static int next_cstate[3][4] =
510 {
511 /* State 0: reading from file, or reading until next .else or .endif */
512 { 0, 1, 2, 2 },
513 /* State 1: condition failed, skipping until next .else or .endif */
514 { 2, 2, 0, 1 },
515 /* State 2: skipping until .endif */
516 { 2, 2, 2, 2 },
517 };
518
519 /* Table of conditionals and the states to set. For each name, there are four
520 values: the length of the name (to save computing it each time), the state to
521 set if a macro was found in the line, the state to set if a macro was not found
522 in the line, and a stack manipulation setting which is:
523
524 -1 pull state value off the stack
525 0 don't alter the stack
526 +1 push value onto stack, before setting new state
527 */
528
529 static cond_item cond_list[] = {
530 { US"ifdef", 5, 0, 1, 1 },
531 { US"ifndef", 6, 1, 0, 1 },
532 { US"elifdef", 7, 2, 3, 0 },
533 { US"elifndef", 8, 3, 2, 0 },
534 { US"else", 4, 2, 2, 0 },
535 { US"endif", 5, 0, 0, -1 }
536 };
537
538 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
539
540 /* Table of syslog facility names and their values */
541
542 static syslog_fac_item syslog_list[] = {
543 { US"mail", LOG_MAIL },
544 { US"user", LOG_USER },
545 { US"news", LOG_NEWS },
546 { US"uucp", LOG_UUCP },
547 { US"local0", LOG_LOCAL0 },
548 { US"local1", LOG_LOCAL1 },
549 { US"local2", LOG_LOCAL2 },
550 { US"local3", LOG_LOCAL3 },
551 { US"local4", LOG_LOCAL4 },
552 { US"local5", LOG_LOCAL5 },
553 { US"local6", LOG_LOCAL6 },
554 { US"local7", LOG_LOCAL7 },
555 { US"daemon", LOG_DAEMON }
556 };
557
558 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
559
560
561 #define opt_fn_print BIT(0)
562 #define opt_fn_print_label BIT(1)
563
564
565 /*************************************************
566 * Find the name of an option *
567 *************************************************/
568
569 /* This function is to aid debugging. Various functions take arguments that are
570 pointer variables in the options table or in option tables for various drivers.
571 For debugging output, it is useful to be able to find the name of the option
572 which is currently being processed. This function finds it, if it exists, by
573 searching the table(s).
574
575 Arguments: a value that is presumed to be in the table above
576 Returns: the option name, or an empty string
577 */
578
579 uschar *
580 readconf_find_option(void *p)
581 {
582 for (int i = 0; i < nelem(optionlist_config); i++)
583 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
584
585 for (router_instance * r = routers; r; r = r->next)
586 {
587 router_info *ri = r->info;
588 for (int i = 0; i < *ri->options_count; i++)
589 {
590 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
591 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
592 return US ri->options[i].name;
593 }
594 }
595
596 for (transport_instance * t = transports; t; t = t->next)
597 {
598 transport_info *ti = t->info;
599 for (int i = 0; i < *ti->options_count; i++)
600 {
601 optionlist * op = &ti->options[i];
602 if ((op->type & opt_mask) != opt_stringptr) continue;
603 if (p == ( op->type & opt_public
604 ? CS t
605 : CS t->options_block
606 )
607 + (long int)op->value)
608 return US op->name;
609 }
610 }
611
612 return US"";
613 }
614
615
616
617
618 /*************************************************
619 * Deal with an assignment to a macro *
620 *************************************************/
621
622 /* We have a new definition; append to the list.
623
624 Args:
625 name Name of the macro; will be copied
626 val Expansion result for the macro; will be copied
627 */
628
629 macro_item *
630 macro_create(const uschar * name, const uschar * val, BOOL command_line)
631 {
632 macro_item * m = store_get(sizeof(macro_item));
633
634 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
635 m->next = NULL;
636 m->command_line = command_line;
637 m->namelen = Ustrlen(name);
638 m->replen = Ustrlen(val);
639 m->name = string_copy(name);
640 m->replacement = string_copy(val);
641 if (mlast)
642 mlast->next = m;
643 else
644 macros = m;
645 mlast = m;
646 if (!macros_user)
647 macros_user = m;
648 return m;
649 }
650
651
652 /* This function is called when a line that starts with an upper case letter is
653 encountered. The argument "line" should contain a complete logical line, and
654 start with the first letter of the macro name. The macro name and the
655 replacement text are extracted and stored. Redefinition of existing,
656 non-command line, macros is permitted using '==' instead of '='.
657
658 Arguments:
659 s points to the start of the logical line
660
661 Returns: FALSE iff fatal error
662 */
663
664 BOOL
665 macro_read_assignment(uschar *s)
666 {
667 uschar name[64];
668 int namelen = 0;
669 BOOL redef = FALSE;
670 macro_item *m;
671
672 while (isalnum(*s) || *s == '_')
673 {
674 if (namelen >= sizeof(name) - 1)
675 {
676 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
677 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
678 return FALSE;
679 }
680 name[namelen++] = *s++;
681 }
682 name[namelen] = 0;
683
684 while (isspace(*s)) s++;
685 if (*s++ != '=')
686 {
687 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
688 return FALSE;
689 }
690
691 if (*s == '=')
692 {
693 redef = TRUE;
694 s++;
695 }
696 while (isspace(*s)) s++;
697
698 /* If an existing macro of the same name was defined on the command line, we
699 just skip this definition. It's an error to attempt to redefine a macro without
700 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
701 It is also an error to define a macro whose name begins with the name of a
702 previously defined macro. This is the requirement that make using a tree
703 for macros hard; we must check all macros for the substring. Perhaps a
704 sorted list, and a bsearch, would work?
705 Note: it is documented that the other way round works. */
706
707 for (m = macros; m; m = m->next)
708 {
709 if (Ustrcmp(m->name, name) == 0)
710 {
711 if (!m->command_line && !redef)
712 {
713 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
714 "defined (use \"==\" if you want to redefine it)", name);
715 return FALSE;
716 }
717 break;
718 }
719
720 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
721 {
722 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
723 "a macro because previously defined macro \"%s\" is a substring",
724 name, m->name);
725 return FALSE;
726 }
727
728 /* We cannot have this test, because it is documented that a substring
729 macro is permitted (there is even an example).
730 *
731 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
732 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
733 * "a macro because it is a substring of previously defined macro \"%s\"",
734 * name, m->name);
735 */
736 }
737
738 /* Check for an overriding command-line definition. */
739
740 if (m && m->command_line) return TRUE;
741
742 /* Redefinition must refer to an existing macro. */
743
744 if (redef)
745 if (m)
746 {
747 m->replen = Ustrlen(s);
748 m->replacement = string_copy(s);
749 }
750 else
751 {
752 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
753 "\"%s\"", name);
754 return FALSE;
755 }
756
757 /* We have a new definition. */
758 else
759 (void) macro_create(name, s, FALSE);
760 return TRUE;
761 }
762
763
764
765
766
767 /* Process line for macros. The line is in big_buffer starting at offset len.
768 Expand big_buffer if needed. Handle definitions of new macros, and
769 macro expansions, rewriting the line in the buffer.
770
771 Arguments:
772 len Offset in buffer of start of line
773 newlen Pointer to offset of end of line, updated on return
774 macro_found Pointer to return that a macro was expanded
775
776 Return: pointer to first nonblank char in line
777 */
778
779 uschar *
780 macros_expand(int len, int * newlen, BOOL * macro_found)
781 {
782 uschar * ss = big_buffer + len;
783 uschar * s;
784
785 /* Find the true start of the physical line - leading spaces are always
786 ignored. */
787
788 while (isspace(*ss)) ss++;
789
790 /* Process the physical line for macros. If this is the start of the logical
791 line, skip over initial text at the start of the line if it starts with an
792 upper case character followed by a sequence of name characters and an equals
793 sign, because that is the definition of a new macro, and we don't do
794 replacement therein. */
795
796 s = ss;
797 if (len == 0 && isupper(*s))
798 {
799 while (isalnum(*s) || *s == '_') s++;
800 while (isspace(*s)) s++;
801 if (*s != '=') s = ss; /* Not a macro definition */
802 }
803
804 /* Skip leading chars which cannot start a macro name, to avoid multiple
805 pointless rescans in Ustrstr calls. */
806
807 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
808
809 /* For each defined macro, scan the line (from after XXX= if present),
810 replacing all occurrences of the macro. */
811
812 *macro_found = FALSE;
813 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
814 {
815 uschar * p, *pp;
816 uschar * t;
817
818 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
819 if (!*s) break;
820
821 t = s;
822 while ((p = Ustrstr(t, m->name)) != NULL)
823 {
824 int moveby;
825
826 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
827 m->name, (int) Ustrlen(ss)-1, ss);
828 /* Expand the buffer if necessary */
829
830 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
831 {
832 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
833 uschar *newbuffer = store_malloc(newsize);
834 memcpy(newbuffer, big_buffer, *newlen + 1);
835 p = newbuffer + (p - big_buffer);
836 s = newbuffer + (s - big_buffer);
837 ss = newbuffer + (ss - big_buffer);
838 t = newbuffer + (t - big_buffer);
839 big_buffer_size = newsize;
840 store_free(big_buffer);
841 big_buffer = newbuffer;
842 }
843
844 /* Shuffle the remaining characters up or down in the buffer before
845 copying in the replacement text. Don't rescan the replacement for this
846 same macro. */
847
848 pp = p + m->namelen;
849 if ((moveby = m->replen - m->namelen) != 0)
850 {
851 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
852 *newlen += moveby;
853 }
854 Ustrncpy(p, m->replacement, m->replen);
855 t = p + m->replen;
856 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
857 *macro_found = TRUE;
858 }
859 }
860
861 /* An empty macro replacement at the start of a line could mean that ss no
862 longer points to the first non-blank character. */
863
864 while (isspace(*ss)) ss++;
865 return ss;
866 }
867
868 /*************************************************
869 * Read configuration line *
870 *************************************************/
871
872 /* A logical line of text is read from the configuration file into the big
873 buffer, taking account of macros, .includes, and continuations. The size of
874 big_buffer is increased if necessary. The count of configuration lines is
875 maintained. Physical input lines starting with # (ignoring leading white space,
876 and after macro replacement) and empty logical lines are always ignored.
877 Leading and trailing spaces are removed.
878
879 If we hit a line of the form "begin xxxx", the xxxx is placed in the
880 next_section vector, and the function returns NULL, indicating the end of a
881 configuration section. On end-of-file, NULL is returned with next_section
882 empty.
883
884 Arguments: none
885
886 Returns: a pointer to the first non-blank in the line,
887 or NULL if eof or end of section is reached
888 */
889
890 static uschar *
891 get_config_line(void)
892 {
893 int startoffset = 0; /* To first non-blank char in logical line */
894 int len = 0; /* Of logical line so far */
895 int newlen;
896 uschar *s, *ss;
897 BOOL macro_found;
898
899 /* Loop for handling continuation lines, skipping comments, and dealing with
900 .include files. */
901
902 for (;;)
903 {
904 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
905 {
906 if (config_file_stack != NULL) /* EOF inside .include */
907 {
908 (void)fclose(config_file);
909 config_file = config_file_stack->file;
910 config_filename = config_file_stack->filename;
911 config_directory = config_file_stack->directory;
912 config_lineno = config_file_stack->lineno;
913 config_file_stack = config_file_stack->next;
914 if (config_lines)
915 save_config_position(config_filename, config_lineno);
916 continue;
917 }
918
919 /* EOF at top level */
920
921 if (cstate_stack_ptr >= 0)
922 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
923 "Unexpected end of configuration file: .endif missing");
924
925 if (len != 0) break; /* EOF after continuation */
926 next_section[0] = 0; /* EOF at start of logical line */
927 return NULL;
928 }
929
930 config_lineno++;
931 newlen = len + Ustrlen(big_buffer + len);
932
933 if (config_lines && config_lineno == 1)
934 save_config_position(config_filename, config_lineno);
935
936 /* Handle pathologically long physical lines - yes, it did happen - by
937 extending big_buffer at this point. The code also copes with very long
938 logical lines. */
939
940 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
941 {
942 uschar *newbuffer;
943 big_buffer_size += BIG_BUFFER_SIZE;
944 newbuffer = store_malloc(big_buffer_size);
945
946 /* This use of strcpy is OK because we know that the string in the old
947 buffer is shorter than the new buffer. */
948
949 Ustrcpy(newbuffer, big_buffer);
950 store_free(big_buffer);
951 big_buffer = newbuffer;
952 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
953 break;
954 newlen += Ustrlen(big_buffer + newlen);
955 }
956
957 ss = macros_expand(len, &newlen, &macro_found);
958
959 /* Check for comment lines - these are physical lines. */
960
961 if (*ss == '#') continue;
962
963 /* Handle conditionals, which are also applied to physical lines. Conditions
964 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
965 expansion occurred on the rest of the line. A preliminary test for the leading
966 '.' saves effort on most lines. */
967
968 if (*ss == '.')
969 {
970 int i;
971
972 /* Search the list of conditional directives */
973
974 for (i = 0; i < cond_list_size; i++)
975 {
976 int n;
977 cond_item *c = cond_list+i;
978 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
979
980 /* The following character must be white space or end of string */
981
982 n = ss[1 + c->namelen];
983 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
984
985 /* .ifdef and .ifndef push the current state onto the stack, then set
986 a new one from the table. Stack overflow is an error */
987
988 if (c->pushpop > 0)
989 {
990 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
991 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
992 ".%s nested too deeply", c->name);
993 cstate_stack[++cstate_stack_ptr] = cstate;
994 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
995 }
996
997 /* For any of the others, stack underflow is an error. The next state
998 comes either from the stack (.endif) or from the table. */
999
1000 else
1001 {
1002 if (cstate_stack_ptr < 0)
1003 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1004 ".%s without matching .ifdef", c->name);
1005 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1006 next_cstate[cstate][macro_found? c->action1 : c->action2];
1007 }
1008
1009 /* Having dealt with a directive, break the loop */
1010
1011 break;
1012 }
1013
1014 /* If we have handled a conditional directive, continue with the next
1015 physical line. Otherwise, fall through. */
1016
1017 if (i < cond_list_size) continue;
1018 }
1019
1020 /* If the conditional state is not 0 (actively using these lines), ignore
1021 this input line. */
1022
1023 if (cstate != 0) continue; /* Conditional skip */
1024
1025 /* Handle .include lines - these are also physical lines. */
1026
1027 if (Ustrncmp(ss, ".include", 8) == 0 &&
1028 (isspace(ss[8]) ||
1029 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1030 {
1031 uschar *t;
1032 int include_if_exists = isspace(ss[8])? 0 : 10;
1033 config_file_item *save;
1034 struct stat statbuf;
1035
1036 ss += 9 + include_if_exists;
1037 while (isspace(*ss)) ss++;
1038 t = ss + Ustrlen(ss);
1039 while (t > ss && isspace(t[-1])) t--;
1040 if (*ss == '\"' && t[-1] == '\"')
1041 {
1042 ss++;
1043 t--;
1044 }
1045 *t = 0;
1046
1047 /* We allow relative file names. For security reasons currently
1048 relative names not allowed with .include_if_exists. For .include_if_exists
1049 we need to check the permissions/ownership of the containing folder */
1050 if (*ss != '/')
1051 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1052 "absolute path \"%s\"", ss);
1053 else
1054 {
1055 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1056 ss = string_from_gstring(g);
1057 }
1058
1059 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1060
1061 if (config_lines)
1062 save_config_position(config_filename, config_lineno);
1063 save = store_get(sizeof(config_file_item));
1064 save->next = config_file_stack;
1065 config_file_stack = save;
1066 save->file = config_file;
1067 save->filename = config_filename;
1068 save->directory = config_directory;
1069 save->lineno = config_lineno;
1070
1071 if (!(config_file = Ufopen(ss, "rb")))
1072 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1073 "configuration file %s", ss);
1074
1075 config_filename = string_copy(ss);
1076 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1077 config_lineno = 0;
1078 continue;
1079 }
1080
1081 /* If this is the start of the logical line, remember where the non-blank
1082 data starts. Otherwise shuffle down continuation lines to remove leading
1083 white space. */
1084
1085 if (len == 0)
1086 startoffset = ss - big_buffer;
1087 else
1088 {
1089 s = big_buffer + len;
1090 if (ss > s)
1091 {
1092 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1093 newlen -= ss - s;
1094 }
1095 }
1096
1097 /* Accept the new addition to the line. Remove trailing white space. */
1098
1099 len = newlen;
1100 while (len > 0 && isspace(big_buffer[len-1])) len--;
1101 big_buffer[len] = 0;
1102
1103 /* We are done if the line does not end in backslash and contains some data.
1104 Empty logical lines are ignored. For continuations, remove the backslash and
1105 go round the loop to read the continuation line. */
1106
1107 if (len > 0)
1108 {
1109 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1110 big_buffer[--len] = 0; /* Remove backslash */
1111 }
1112 } /* Loop for reading multiple physical lines */
1113
1114 /* We now have a logical line. Test for the end of a configuration section (or,
1115 more accurately, for the start of the next section). Place the name of the next
1116 section in next_section, and return NULL. If the name given is longer than
1117 next_section, truncate it. It will be unrecognized later, because all the known
1118 section names do fit. Leave space for pluralizing. */
1119
1120 s = big_buffer + startoffset; /* First non-space character */
1121
1122 if (config_lines)
1123 save_config_line(s);
1124
1125 if (strncmpic(s, US"begin ", 6) == 0)
1126 {
1127 s += 6;
1128 while (isspace(*s)) s++;
1129 if (big_buffer + len - s > sizeof(next_section) - 2)
1130 s[sizeof(next_section) - 2] = 0;
1131 Ustrcpy(next_section, s);
1132 return NULL;
1133 }
1134
1135 /* Return the first non-blank character. */
1136
1137 return s;
1138 }
1139
1140
1141
1142 /*************************************************
1143 * Read a name *
1144 *************************************************/
1145
1146 /* The yield is the pointer to the next uschar. Names longer than the
1147 output space are silently truncated. This function is also used from acl.c when
1148 parsing ACLs.
1149
1150 Arguments:
1151 name where to put the name
1152 len length of name
1153 s input pointer
1154
1155 Returns: new input pointer
1156 */
1157
1158 uschar *
1159 readconf_readname(uschar *name, int len, uschar *s)
1160 {
1161 int p = 0;
1162 while (isspace(*s)) s++;
1163 if (isalpha(*s))
1164 {
1165 while (isalnum(*s) || *s == '_')
1166 {
1167 if (p < len-1) name[p++] = *s;
1168 s++;
1169 }
1170 }
1171 name[p] = 0;
1172 while (isspace(*s)) s++;
1173 return s;
1174 }
1175
1176
1177
1178
1179 /*************************************************
1180 * Read a time value *
1181 *************************************************/
1182
1183 /* This function is also called from outside, to read argument
1184 time values. The format of a time value is:
1185
1186 [<n>w][<n>d][<n>h][<n>m][<n>s]
1187
1188 as long as at least one is present. If a format error is encountered,
1189 return a negative value. The value must be terminated by the given
1190 terminator.
1191
1192 Arguments:
1193 s input pointer
1194 terminator required terminating character
1195 return_msec if TRUE, allow fractional seconds and return milliseconds
1196
1197 Returns: the time value, or -1 on syntax error
1198 value is seconds if return_msec is FALSE
1199 value is milliseconds if return_msec is TRUE
1200 */
1201
1202 int
1203 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1204 {
1205 int yield = 0;
1206 for (;;)
1207 {
1208 int value, count;
1209 double fraction;
1210
1211 if (!isdigit(*s)) return -1;
1212 (void)sscanf(CCS s, "%d%n", &value, &count);
1213 s += count;
1214
1215 switch (*s)
1216 {
1217 case 'w': value *= 7;
1218 case 'd': value *= 24;
1219 case 'h': value *= 60;
1220 case 'm': value *= 60;
1221 case 's': s++;
1222 break;
1223
1224 case '.':
1225 if (!return_msec) return -1;
1226 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1227 s += count;
1228 if (*s++ != 's') return -1;
1229 yield += (int)(fraction * 1000.0);
1230 break;
1231
1232 default: return -1;
1233 }
1234
1235 if (return_msec) value *= 1000;
1236 yield += value;
1237 if (*s == terminator) return yield;
1238 }
1239 /* Control never reaches here. */
1240 }
1241
1242
1243
1244 /*************************************************
1245 * Read a fixed point value *
1246 *************************************************/
1247
1248 /* The value is returned *1000
1249
1250 Arguments:
1251 s input pointer
1252 terminator required terminator
1253
1254 Returns: the value, or -1 on error
1255 */
1256
1257 static int
1258 readconf_readfixed(const uschar *s, int terminator)
1259 {
1260 int yield = 0;
1261 int value, count;
1262 if (!isdigit(*s)) return -1;
1263 (void)sscanf(CS s, "%d%n", &value, &count);
1264 s += count;
1265 yield = value * 1000;
1266 if (*s == '.')
1267 {
1268 int m = 100;
1269 while (isdigit((*(++s))))
1270 {
1271 yield += (*s - '0') * m;
1272 m /= 10;
1273 }
1274 }
1275
1276 return (*s == terminator)? yield : (-1);
1277 }
1278
1279
1280
1281 /*************************************************
1282 * Find option in list *
1283 *************************************************/
1284
1285 /* The lists are always in order, so binary chop can be used.
1286
1287 Arguments:
1288 name the option name to search for
1289 ol the first entry in the option list
1290 last one more than the offset of the last entry in the option list
1291
1292 Returns: pointer to an option entry, or NULL if not found
1293 */
1294
1295 static optionlist *
1296 find_option(uschar *name, optionlist *ol, int last)
1297 {
1298 int first = 0;
1299 while (last > first)
1300 {
1301 int middle = (first + last)/2;
1302 int c = Ustrcmp(name, ol[middle].name);
1303
1304 if (c == 0) return ol + middle;
1305 else if (c > 0) first = middle + 1;
1306 else last = middle;
1307 }
1308 return NULL;
1309 }
1310
1311
1312
1313 /*************************************************
1314 * Find a set flag in option list *
1315 *************************************************/
1316
1317 /* Because some versions of Unix make no restrictions on the values of uids and
1318 gids (even negative ones), we cannot represent "unset" by a special value.
1319 There is therefore a separate boolean variable for each one indicating whether
1320 a value is set or not. This function returns a pointer to the boolean, given
1321 the original option name. It is a major disaster if the flag cannot be found.
1322
1323 Arguments:
1324 name the name of the uid or gid option
1325 oltop points to the start of the relevant option list
1326 last one more than the offset of the last item in the option list
1327 data_block NULL when reading main options => data values in the option
1328 list are absolute addresses; otherwise they are byte offsets
1329 in data_block (used for driver options)
1330
1331 Returns: a pointer to the boolean flag.
1332 */
1333
1334 static BOOL *
1335 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1336 {
1337 optionlist *ol;
1338 uschar name2[64];
1339 sprintf(CS name2, "*set_%.50s", name);
1340 ol = find_option(name2, oltop, last);
1341 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1342 "Exim internal error: missing set flag for %s", name);
1343 return (data_block == NULL)? (BOOL *)(ol->value) :
1344 (BOOL *)(US data_block + (long int)(ol->value));
1345 }
1346
1347
1348
1349
1350 /*************************************************
1351 * Output extra characters message and die *
1352 *************************************************/
1353
1354 /* Called when an option line has junk on the end. Sometimes this is because
1355 the sysadmin thinks comments are permitted.
1356
1357 Arguments:
1358 s points to the extra characters
1359 t1..t3 strings to insert in the log message
1360
1361 Returns: doesn't return; dies
1362 */
1363
1364 static void
1365 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1366 {
1367 uschar *comment = US"";
1368 if (*s == '#') comment = US" (# is comment only at line start)";
1369 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1370 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1371 }
1372
1373
1374
1375 /*************************************************
1376 * Read rewrite information *
1377 *************************************************/
1378
1379 /* Each line of rewrite information contains:
1380
1381 . A complete address in the form user@domain, possibly with
1382 leading * for each part; or alternatively, a regex.
1383
1384 . A replacement string (which will be expanded).
1385
1386 . An optional sequence of one-letter flags, indicating which
1387 headers etc. to apply this rule to.
1388
1389 All this is decoded and placed into a control block. The OR of the flags is
1390 maintained in a common word.
1391
1392 Arguments:
1393 p points to the string that makes up the rule
1394 existflags points to the overall flag word
1395 isglobal TRUE if reading global rewrite rules
1396
1397 Returns: the control block for the parsed rule.
1398 */
1399
1400 static rewrite_rule *
1401 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1402 {
1403 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1404
1405 next->next = NULL;
1406 next->key = string_dequote(&p);
1407
1408 while (isspace(*p)) p++;
1409 if (*p == 0)
1410 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1411 "missing rewrite replacement string");
1412
1413 next->flags = 0;
1414 next->replacement = string_dequote(&p);
1415
1416 while (*p != 0) switch (*p++)
1417 {
1418 case ' ': case '\t': break;
1419
1420 case 'q': next->flags |= rewrite_quit; break;
1421 case 'w': next->flags |= rewrite_whole; break;
1422
1423 case 'h': next->flags |= rewrite_all_headers; break;
1424 case 's': next->flags |= rewrite_sender; break;
1425 case 'f': next->flags |= rewrite_from; break;
1426 case 't': next->flags |= rewrite_to; break;
1427 case 'c': next->flags |= rewrite_cc; break;
1428 case 'b': next->flags |= rewrite_bcc; break;
1429 case 'r': next->flags |= rewrite_replyto; break;
1430
1431 case 'E': next->flags |= rewrite_all_envelope; break;
1432 case 'F': next->flags |= rewrite_envfrom; break;
1433 case 'T': next->flags |= rewrite_envto; break;
1434
1435 case 'Q': next->flags |= rewrite_qualify; break;
1436 case 'R': next->flags |= rewrite_repeat; break;
1437
1438 case 'S':
1439 next->flags |= rewrite_smtp;
1440 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1441 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1442 "rewrite rule has the S flag but is not a regular expression");
1443 break;
1444
1445 default:
1446 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1447 "unknown rewrite flag character '%c' "
1448 "(could be missing quotes round replacement item)", p[-1]);
1449 break;
1450 }
1451
1452 /* If no action flags are set, set all the "normal" rewrites. */
1453
1454 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1455 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1456
1457 /* Remember which exist, for optimization, and return the rule */
1458
1459 *existflags |= next->flags;
1460 return next;
1461 }
1462
1463
1464
1465
1466 /*************************************************
1467 * Read global rewrite information *
1468 *************************************************/
1469
1470 /* Each line is a single rewrite rule; it is parsed into a control block
1471 by readconf_one_rewrite(), and its flags are ORed into the global flag
1472 word rewrite_existflags. */
1473
1474 void
1475 readconf_rewrites(void)
1476 {
1477 rewrite_rule **chain = &global_rewrite_rules;
1478 uschar *p;
1479
1480 while ((p = get_config_line()) != NULL)
1481 {
1482 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1483 *chain = next;
1484 chain = &(next->next);
1485 }
1486 }
1487
1488
1489
1490 /*************************************************
1491 * Read a string *
1492 *************************************************/
1493
1494 /* Strings are read into the normal store pool. As long we aren't too
1495 near the end of the current block, the string will just use what is necessary
1496 on the top of the stacking pool, because string_cat() uses the extension
1497 mechanism.
1498
1499 Argument:
1500 s the rest of the input line
1501 name the option name (for errors)
1502
1503 Returns: pointer to the string
1504 */
1505
1506 static uschar *
1507 read_string(const uschar *s, const uschar *name)
1508 {
1509 uschar *yield;
1510 const uschar *ss;
1511
1512 if (*s != '\"') return string_copy(s);
1513
1514 ss = s;
1515 yield = string_dequote(&s);
1516
1517 if (s == ss+1 || s[-1] != '\"')
1518 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1519 "missing quote at end of string value for %s", name);
1520
1521 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1522
1523 return yield;
1524 }
1525
1526
1527 /*************************************************
1528 * Custom-handler options *
1529 *************************************************/
1530 static void
1531 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1532 {
1533 if (flags & opt_fn_print)
1534 {
1535 if (flags & opt_fn_print_label) printf("%s = ", name);
1536 printf("%s\n", smtp_receive_timeout_s
1537 ? string_printing2(smtp_receive_timeout_s, FALSE)
1538 : readconf_printtime(smtp_receive_timeout));
1539 }
1540 else if (*str == '$')
1541 smtp_receive_timeout_s = string_copy(str);
1542 else
1543 {
1544 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1545 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1546 if (smtp_receive_timeout < 0)
1547 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1548 name);
1549 }
1550 }
1551
1552 /*************************************************
1553 * Handle option line *
1554 *************************************************/
1555
1556 /* This function is called from several places to process a line containing the
1557 setting of an option. The first argument is the line to be decoded; it has been
1558 checked not to be empty and not to start with '#'. Trailing newlines and white
1559 space have been removed. The second argument is a pointer to the list of
1560 variable names that are to be recognized, together with their types and
1561 locations, and the third argument gives the number of entries in the list.
1562
1563 The fourth argument is a pointer to a data block. If it is NULL, then the data
1564 values in the options list are absolute addresses. Otherwise, they are byte
1565 offsets in the data block.
1566
1567 String option data may continue onto several lines; this function reads further
1568 data from config_file if necessary.
1569
1570 The yield of this function is normally zero. If a string continues onto
1571 multiple lines, then the data value is permitted to be followed by a comma
1572 or a semicolon (for use in drivers) and the yield is that character.
1573
1574 Arguments:
1575 buffer contains the configuration line to be handled
1576 oltop points to the start of the relevant option list
1577 last one more than the offset of the last item in the option list
1578 data_block NULL when reading main options => data values in the option
1579 list are absolute addresses; otherwise they are byte offsets
1580 in data_block when they have opt_public set; otherwise
1581 they are byte offsets in data_block->options_block.
1582 unknown_txt format string to use in panic message for unknown option;
1583 must contain %s for option name
1584 if given as NULL, don't panic on unknown option
1585
1586 Returns: TRUE if an option was read successfully,
1587 FALSE false for an unknown option if unknown_txt == NULL,
1588 otherwise panic and die on an unknown option
1589 */
1590
1591 static BOOL
1592 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1593 void *data_block, uschar *unknown_txt)
1594 {
1595 int ptr = 0;
1596 int offset = 0;
1597 int count, type, value;
1598 int issecure = 0;
1599 uid_t uid;
1600 gid_t gid;
1601 BOOL boolvalue = TRUE;
1602 BOOL freesptr = TRUE;
1603 optionlist *ol, *ol2;
1604 struct passwd *pw;
1605 void *reset_point;
1606 int intbase = 0;
1607 uschar *inttype = US"";
1608 uschar *sptr;
1609 uschar *s = buffer;
1610 uschar **str_target;
1611 uschar name[64];
1612 uschar name2[64];
1613
1614 /* There may be leading spaces; thereafter, we expect an option name starting
1615 with a letter. */
1616
1617 while (isspace(*s)) s++;
1618 if (!isalpha(*s))
1619 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1620
1621 /* Read the name of the option, and skip any subsequent white space. If
1622 it turns out that what we read was "hide", set the flag indicating that
1623 this is a secure option, and loop to read the next word. */
1624
1625 for (int n = 0; n < 2; n++)
1626 {
1627 while (isalnum(*s) || *s == '_')
1628 {
1629 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1630 s++;
1631 }
1632 name[ptr] = 0;
1633 while (isspace(*s)) s++;
1634 if (Ustrcmp(name, "hide") != 0) break;
1635 issecure = opt_secure;
1636 ptr = 0;
1637 }
1638
1639 /* Deal with "no_" or "not_" here for booleans */
1640
1641 if (Ustrncmp(name, "no_", 3) == 0)
1642 {
1643 boolvalue = FALSE;
1644 offset = 3;
1645 }
1646
1647 if (Ustrncmp(name, "not_", 4) == 0)
1648 {
1649 boolvalue = FALSE;
1650 offset = 4;
1651 }
1652
1653 /* Search the list for the given name. A non-existent name, or an option that
1654 is set twice, is a disaster. */
1655
1656 if (!(ol = find_option(name + offset, oltop, last)))
1657 {
1658 if (unknown_txt == NULL) return FALSE;
1659 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1660 }
1661
1662 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1663 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1664 "\"%s\" option set for the second time", name);
1665
1666 ol->type |= opt_set | issecure;
1667 type = ol->type & opt_mask;
1668
1669 /* Types with data values must be followed by '='; the "no[t]_" prefix
1670 applies only to boolean values. */
1671
1672 if (type < opt_bool || type > opt_bool_last)
1673 {
1674 if (offset != 0)
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1676 "negation prefix applied to a non-boolean option");
1677 if (*s == 0)
1678 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1679 "unexpected end of line (data missing) after %s", name);
1680 if (*s != '=')
1681 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1682 }
1683
1684 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1685 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1686 ultimately expands to one of those values. */
1687
1688 else if (*s != 0 && (offset != 0 || *s != '='))
1689 extra_chars_error(s, US"boolean option ", name, US"");
1690
1691 /* Skip white space after = */
1692
1693 if (*s == '=') while (isspace((*(++s))));
1694
1695 /* If there is a data block and the opt_public flag is not set, change
1696 the data block pointer to the private options block. */
1697
1698 if (data_block != NULL && (ol->type & opt_public) == 0)
1699 data_block = (void *)(((driver_instance *)data_block)->options_block);
1700
1701 /* Now get the data according to the type. */
1702
1703 switch (type)
1704 {
1705 /* If a string value is not enclosed in quotes, it consists of
1706 the rest of the current line, verbatim. Otherwise, string escapes
1707 are processed.
1708
1709 A transport is specified as a string, which is then looked up in the
1710 list of transports. A search type is specified as one of a number of
1711 known strings.
1712
1713 A set or rewrite rules for a driver is specified as a string, which is
1714 then parsed into a suitable chain of control blocks.
1715
1716 Uids and gids are specified as strings which are then looked up in the
1717 passwd file. Lists of uids and gids are similarly specified as colon-
1718 separated strings. */
1719
1720 case opt_stringptr:
1721 case opt_uid:
1722 case opt_gid:
1723 case opt_expand_uid:
1724 case opt_expand_gid:
1725 case opt_uidlist:
1726 case opt_gidlist:
1727 case opt_rewrite:
1728
1729 reset_point = sptr = read_string(s, name);
1730
1731 /* Having read a string, we now have several different ways of using it,
1732 depending on the data type, so do another switch. If keeping the actual
1733 string is not required (because it is interpreted), freesptr is set TRUE,
1734 and at the end we reset the pool. */
1735
1736 switch (type)
1737 {
1738 /* If this was a string, set the variable to point to the new string,
1739 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1740 rules, we still keep the string (for printing), and parse the rules into a
1741 control block and flags word. */
1742
1743 case opt_stringptr:
1744 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1745 : USS (ol->value);
1746 if (ol->type & opt_rep_con)
1747 {
1748 uschar * saved_condition;
1749 /* We already have a condition, we're conducting a crude hack to let
1750 multiple condition rules be chained together, despite storing them in
1751 text form. */
1752 *str_target = string_copy_malloc( (saved_condition = *str_target)
1753 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1754 saved_condition, sptr)
1755 : sptr);
1756 /* TODO(pdp): there is a memory leak here and just below
1757 when we set 3 or more conditions; I still don't
1758 understand the store mechanism enough to know
1759 what's the safe way to free content from an earlier store.
1760 AFAICT, stores stack, so freeing an early stored item also stores
1761 all data alloc'd after it. If we knew conditions were adjacent,
1762 we could survive that, but we don't. So I *think* we need to take
1763 another bit from opt_type to indicate "malloced"; this seems like
1764 quite a hack, especially for this one case. It also means that
1765 we can't ever reclaim the store from the *first* condition.
1766
1767 Because we only do this once, near process start-up, I'm prepared to
1768 let this slide for the time being, even though it rankles. */
1769 }
1770 else if (ol->type & opt_rep_str)
1771 {
1772 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1773 int sep_i = -(int)sep_o;
1774 const uschar * list = sptr;
1775 uschar * s;
1776 gstring * list_o = NULL;
1777
1778 if (*str_target)
1779 {
1780 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1781 list_o = string_cat(list_o, *str_target);
1782 }
1783
1784 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1785 list_o = string_append_listele(list_o, sep_o, s);
1786
1787 if (list_o)
1788 *str_target = string_copy_malloc(string_from_gstring(list_o));
1789 }
1790 else
1791 {
1792 *str_target = sptr;
1793 freesptr = FALSE;
1794 }
1795 break;
1796
1797 case opt_rewrite:
1798 if (data_block)
1799 *USS (US data_block + (long int)(ol->value)) = sptr;
1800 else
1801 *USS (ol->value) = sptr;
1802 freesptr = FALSE;
1803 if (type == opt_rewrite)
1804 {
1805 int sep = 0;
1806 int *flagptr;
1807 uschar *p = sptr;
1808 rewrite_rule **chain;
1809 optionlist *ol3;
1810
1811 sprintf(CS name2, "*%.50s_rules", name);
1812 ol2 = find_option(name2, oltop, last);
1813 sprintf(CS name2, "*%.50s_flags", name);
1814 ol3 = find_option(name2, oltop, last);
1815
1816 if (ol2 == NULL || ol3 == NULL)
1817 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1818 "rewrite rules not available for driver");
1819
1820 if (data_block == NULL)
1821 {
1822 chain = (rewrite_rule **)(ol2->value);
1823 flagptr = (int *)(ol3->value);
1824 }
1825 else
1826 {
1827 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1828 flagptr = (int *)(US data_block + (long int)(ol3->value));
1829 }
1830
1831 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1832 {
1833 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1834 *chain = next;
1835 chain = &(next->next);
1836 }
1837
1838 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1839 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1840 "non-header rewrite - not allowed at transport time -");
1841 }
1842 break;
1843
1844 /* If it was an expanded uid, see if there is any expansion to be
1845 done by checking for the presence of a $ character. If there is, save it
1846 in the corresponding *expand_user option field. Otherwise, fall through
1847 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1848 of data. */
1849
1850 case opt_expand_uid:
1851 sprintf(CS name2, "*expand_%.50s", name);
1852 ol2 = find_option(name2, oltop, last);
1853 if (ol2 != NULL)
1854 {
1855 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1856
1857 if (data_block == NULL)
1858 *((uschar **)(ol2->value)) = ss;
1859 else
1860 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1861
1862 if (ss != NULL)
1863 {
1864 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1865 freesptr = FALSE;
1866 break;
1867 }
1868 }
1869
1870 /* Look up a fixed uid, and also make use of the corresponding gid
1871 if a passwd entry is returned and the gid has not been set. */
1872
1873 case opt_uid:
1874 if (!route_finduser(sptr, &pw, &uid))
1875 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1876 if (data_block == NULL)
1877 *((uid_t *)(ol->value)) = uid;
1878 else
1879 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1880
1881 /* Set the flag indicating a fixed value is set */
1882
1883 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1884
1885 /* Handle matching gid if we have a passwd entry: done by finding the
1886 same name with terminating "user" changed to "group"; if not found,
1887 ignore. Also ignore if the value is already set. */
1888
1889 if (pw == NULL) break;
1890 Ustrcpy(name+Ustrlen(name)-4, "group");
1891 ol2 = find_option(name, oltop, last);
1892 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1893 (ol2->type & opt_mask) == opt_expand_gid))
1894 {
1895 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1896 if (! *set_flag)
1897 {
1898 if (data_block == NULL)
1899 *((gid_t *)(ol2->value)) = pw->pw_gid;
1900 else
1901 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1902 *set_flag = TRUE;
1903 }
1904 }
1905 break;
1906
1907 /* If it was an expanded gid, see if there is any expansion to be
1908 done by checking for the presence of a $ character. If there is, save it
1909 in the corresponding *expand_user option field. Otherwise, fall through
1910 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1911 of data. */
1912
1913 case opt_expand_gid:
1914 sprintf(CS name2, "*expand_%.50s", name);
1915 ol2 = find_option(name2, oltop, last);
1916 if (ol2 != NULL)
1917 {
1918 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1919
1920 if (data_block == NULL)
1921 *((uschar **)(ol2->value)) = ss;
1922 else
1923 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1924
1925 if (ss != NULL)
1926 {
1927 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1928 freesptr = FALSE;
1929 break;
1930 }
1931 }
1932
1933 /* Handle freestanding gid */
1934
1935 case opt_gid:
1936 if (!route_findgroup(sptr, &gid))
1937 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1938 if (data_block == NULL)
1939 *((gid_t *)(ol->value)) = gid;
1940 else
1941 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1942 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1943 break;
1944
1945 /* If it was a uid list, look up each individual entry, and build
1946 a vector of uids, with a count in the first element. Put the vector
1947 in malloc store so we can free the string. (We are reading into
1948 permanent store already.) */
1949
1950 case opt_uidlist:
1951 {
1952 int count = 1;
1953 uid_t *list;
1954 int ptr = 0;
1955 const uschar *p;
1956 const uschar *op = expand_string (sptr);
1957
1958 if (op == NULL)
1959 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1960 name, expand_string_message);
1961
1962 p = op;
1963 if (*p != 0) count++;
1964 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1965 list = store_malloc(count*sizeof(uid_t));
1966 list[ptr++] = (uid_t)(count - 1);
1967
1968 if (data_block == NULL)
1969 *((uid_t **)(ol->value)) = list;
1970 else
1971 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1972
1973 p = op;
1974 while (count-- > 1)
1975 {
1976 int sep = 0;
1977 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1978 if (!route_finduser(big_buffer, NULL, &uid))
1979 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1980 big_buffer);
1981 list[ptr++] = uid;
1982 }
1983 }
1984 break;
1985
1986 /* If it was a gid list, look up each individual entry, and build
1987 a vector of gids, with a count in the first element. Put the vector
1988 in malloc store so we can free the string. (We are reading into permanent
1989 store already.) */
1990
1991 case opt_gidlist:
1992 {
1993 int count = 1;
1994 gid_t *list;
1995 int ptr = 0;
1996 const uschar *p;
1997 const uschar *op = expand_string (sptr);
1998
1999 if (op == NULL)
2000 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2001 name, expand_string_message);
2002
2003 p = op;
2004 if (*p != 0) count++;
2005 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2006 list = store_malloc(count*sizeof(gid_t));
2007 list[ptr++] = (gid_t)(count - 1);
2008
2009 if (data_block == NULL)
2010 *((gid_t **)(ol->value)) = list;
2011 else
2012 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2013
2014 p = op;
2015 while (count-- > 1)
2016 {
2017 int sep = 0;
2018 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2019 if (!route_findgroup(big_buffer, &gid))
2020 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2021 big_buffer);
2022 list[ptr++] = gid;
2023 }
2024 }
2025 break;
2026 }
2027
2028 /* Release store if the value of the string doesn't need to be kept. */
2029
2030 if (freesptr) store_reset(reset_point);
2031 break;
2032
2033 /* Expanded boolean: if no characters follow, or if there are no dollar
2034 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2035 save the string for later expansion in the alternate place. */
2036
2037 case opt_expand_bool:
2038 if (*s != 0 && Ustrchr(s, '$') != 0)
2039 {
2040 sprintf(CS name2, "*expand_%.50s", name);
2041 ol2 = find_option(name2, oltop, last);
2042 if (ol2 != NULL)
2043 {
2044 reset_point = sptr = read_string(s, name);
2045 if (data_block == NULL)
2046 *((uschar **)(ol2->value)) = sptr;
2047 else
2048 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2049 freesptr = FALSE;
2050 break;
2051 }
2052 }
2053 /* Fall through */
2054
2055 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2056 look for yes/not/true/false. Some booleans are stored in a single bit in
2057 a single int. There's a special fudge for verify settings; without a suffix
2058 they set both xx_sender and xx_recipient. The table points to the sender
2059 value; search subsequently for the recipient. There's another special case:
2060 opt_bool_set also notes when a boolean has been set. */
2061
2062 case opt_bool:
2063 case opt_bit:
2064 case opt_bool_verify:
2065 case opt_bool_set:
2066 if (*s != 0)
2067 {
2068 s = readconf_readname(name2, 64, s);
2069 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2070 boolvalue = TRUE;
2071 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2072 boolvalue = FALSE;
2073 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2074 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2075 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2076 US"for boolean option ", name);
2077 }
2078
2079 /* Handle single-bit type. */
2080
2081 if (type == opt_bit)
2082 {
2083 int bit = 1 << ((ol->type >> 16) & 31);
2084 int *ptr = (data_block == NULL)?
2085 (int *)(ol->value) :
2086 (int *)(US data_block + (long int)ol->value);
2087 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2088 break;
2089 }
2090
2091 /* Handle full BOOL types */
2092
2093 if (data_block == NULL)
2094 *((BOOL *)(ol->value)) = boolvalue;
2095 else
2096 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2097
2098 /* Verify fudge */
2099
2100 if (type == opt_bool_verify)
2101 {
2102 sprintf(CS name2, "%.50s_recipient", name + offset);
2103 ol2 = find_option(name2, oltop, last);
2104 if (ol2 != NULL)
2105 {
2106 if (data_block == NULL)
2107 *((BOOL *)(ol2->value)) = boolvalue;
2108 else
2109 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2110 }
2111 }
2112
2113 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2114
2115 else if (type == opt_bool_set)
2116 {
2117 sprintf(CS name2, "*set_%.50s", name + offset);
2118 ol2 = find_option(name2, oltop, last);
2119 if (ol2 != NULL)
2120 {
2121 if (data_block == NULL)
2122 *((BOOL *)(ol2->value)) = TRUE;
2123 else
2124 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2125 }
2126 }
2127 break;
2128
2129 /* Octal integer */
2130
2131 case opt_octint:
2132 intbase = 8;
2133 inttype = US"octal ";
2134
2135 /* Integer: a simple(ish) case; allow octal and hex formats, and
2136 suffixes K, M, G, and T. The different types affect output, not input. */
2137
2138 case opt_mkint:
2139 case opt_int:
2140 {
2141 uschar *endptr;
2142 long int lvalue;
2143
2144 errno = 0;
2145 lvalue = strtol(CS s, CSS &endptr, intbase);
2146
2147 if (endptr == s)
2148 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2149 inttype, name);
2150
2151 if (errno != ERANGE && *endptr)
2152 {
2153 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2154
2155 if ((mp = Ustrchr(mp, *endptr)))
2156 {
2157 endptr++;
2158 do
2159 {
2160 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2161 {
2162 errno = ERANGE;
2163 break;
2164 }
2165 lvalue *= 1024;
2166 }
2167 while (*(mp += 2));
2168 }
2169 }
2170
2171 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2172 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2173 "absolute value of integer \"%s\" is too large (overflow)", s);
2174
2175 while (isspace(*endptr)) endptr++;
2176 if (*endptr)
2177 extra_chars_error(endptr, inttype, US"integer value for ", name);
2178
2179 value = (int)lvalue;
2180 }
2181
2182 if (data_block)
2183 *(int *)(US data_block + (long int)ol->value) = value;
2184 else
2185 *(int *)ol->value = value;
2186 break;
2187
2188 /* Integer held in K: again, allow formats and suffixes as above. */
2189
2190 case opt_Kint:
2191 {
2192 uschar *endptr;
2193 errno = 0;
2194 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2195
2196 if (endptr == s)
2197 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2198 inttype, name);
2199
2200 if (errno != ERANGE && *endptr)
2201 {
2202 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2203
2204 if ((mp = Ustrchr(mp, *endptr)))
2205 {
2206 endptr++;
2207 while (*(mp += 2))
2208 {
2209 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2210 {
2211 errno = ERANGE;
2212 break;
2213 }
2214 lvalue *= 1024;
2215 }
2216 }
2217 else
2218 lvalue = (lvalue + 512)/1024;
2219 }
2220
2221 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2222 "absolute value of integer \"%s\" is too large (overflow)", s);
2223
2224 while (isspace(*endptr)) endptr++;
2225 if (*endptr != 0)
2226 extra_chars_error(endptr, inttype, US"integer value for ", name);
2227
2228 if (data_block)
2229 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2230 else
2231 *(int_eximarith_t *)ol->value = lvalue;
2232 break;
2233 }
2234
2235 /* Fixed-point number: held to 3 decimal places. */
2236
2237 case opt_fixed:
2238 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2239 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2240 "fixed-point number expected for %s", name);
2241
2242 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2243 "integer \"%s\" is too large (overflow)", s);
2244
2245 value *= 1000;
2246
2247 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2248 "integer \"%s\" is too large (overflow)", s);
2249
2250 /* We get a coverity error here for using count, as it derived
2251 from the tainted buffer pointed to by s, as parsed by sscanf().
2252 By the definition of sscanf we must be accessing between start
2253 and end of s (assuming it is nul-terminated...) so ignore the error. */
2254 /* coverity[tainted_data] */
2255 if (s[count] == '.')
2256 {
2257 int d = 100;
2258 while (isdigit(s[++count]))
2259 {
2260 value += (s[count] - '0') * d;
2261 d /= 10;
2262 }
2263 }
2264
2265 while (isspace(s[count])) count++;
2266
2267 if (s[count] != 0)
2268 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2269
2270 if (data_block == NULL)
2271 *((int *)(ol->value)) = value;
2272 else
2273 *((int *)(US data_block + (long int)(ol->value))) = value;
2274 break;
2275
2276 /* There's a special routine to read time values. */
2277
2278 case opt_time:
2279 value = readconf_readtime(s, 0, FALSE);
2280 if (value < 0)
2281 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2282 name);
2283 if (data_block == NULL)
2284 *((int *)(ol->value)) = value;
2285 else
2286 *((int *)(US data_block + (long int)(ol->value))) = value;
2287 break;
2288
2289 /* A time list is a list of colon-separated times, with the first
2290 element holding the size of the list and the second the number of
2291 entries used. */
2292
2293 case opt_timelist:
2294 {
2295 int count = 0;
2296 int *list = (data_block == NULL)?
2297 (int *)(ol->value) :
2298 (int *)(US data_block + (long int)(ol->value));
2299
2300 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2301 {
2302 int terminator = 0;
2303 uschar *snext = Ustrchr(s, ':');
2304 if (snext != NULL)
2305 {
2306 uschar *ss = snext;
2307 while (ss > s && isspace(ss[-1])) ss--;
2308 terminator = *ss;
2309 }
2310 value = readconf_readtime(s, terminator, FALSE);
2311 if (value < 0)
2312 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2313 name);
2314 if (count > 1 && value <= list[count])
2315 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2316 "time value out of order for %s", name);
2317 list[count+1] = value;
2318 if (snext == NULL) break;
2319 s = snext + 1;
2320 while (isspace(*s)) s++;
2321 }
2322
2323 if (count > list[0] - 2)
2324 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2325 name);
2326 if (count > 0 && list[2] == 0) count = 0;
2327 list[1] = count;
2328 break;
2329 }
2330
2331 case opt_func:
2332 {
2333 void (*fn)() = ol->value;
2334 fn(name, s, 0);
2335 break;
2336 }
2337 }
2338
2339 return TRUE;
2340 }
2341
2342
2343
2344 /*************************************************
2345 * Print a time value *
2346 *************************************************/
2347
2348 /*
2349 Argument: a time value in seconds
2350 Returns: pointer to a fixed buffer containing the time as a string,
2351 in readconf_readtime() format
2352 */
2353
2354 uschar *
2355 readconf_printtime(int t)
2356 {
2357 int s, m, h, d, w;
2358 uschar *p = time_buffer;
2359
2360 if (t < 0)
2361 {
2362 *p++ = '-';
2363 t = -t;
2364 }
2365
2366 s = t % 60;
2367 t /= 60;
2368 m = t % 60;
2369 t /= 60;
2370 h = t % 24;
2371 t /= 24;
2372 d = t % 7;
2373 w = t/7;
2374
2375 if (w > 0) p += sprintf(CS p, "%dw", w);
2376 if (d > 0) p += sprintf(CS p, "%dd", d);
2377 if (h > 0) p += sprintf(CS p, "%dh", h);
2378 if (m > 0) p += sprintf(CS p, "%dm", m);
2379 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2380
2381 return time_buffer;
2382 }
2383
2384
2385
2386 /*************************************************
2387 * Print an individual option value *
2388 *************************************************/
2389
2390 /* This is used by the -bP option, so prints to the standard output.
2391 The entire options list is passed in as an argument, because some options come
2392 in pairs - typically uid/gid settings, which can either be explicit numerical
2393 values, or strings to be expanded later. If the numerical value is unset,
2394 search for "*expand_<name>" to see if there is a string equivalent.
2395
2396 Arguments:
2397 ol option entry, or NULL for an unknown option
2398 name option name
2399 options_block NULL for main configuration options; otherwise points to
2400 a driver block; if the option doesn't have opt_public
2401 set, then options_block->options_block is where the item
2402 resides.
2403 oltop points to the option list in which ol exists
2404 last one more than the offset of the last entry in optop
2405 no_labels do not show "foo = " at the start.
2406
2407 Returns: boolean success
2408 */
2409
2410 static BOOL
2411 print_ol(optionlist *ol, uschar *name, void *options_block,
2412 optionlist *oltop, int last, BOOL no_labels)
2413 {
2414 struct passwd *pw;
2415 struct group *gr;
2416 optionlist *ol2;
2417 void *value;
2418 uid_t *uidlist;
2419 gid_t *gidlist;
2420 uschar *s;
2421 uschar name2[64];
2422
2423 if (!ol)
2424 {
2425 printf("%s is not a known option\n", name);
2426 return FALSE;
2427 }
2428
2429 /* Non-admin callers cannot see options that have been flagged secure by the
2430 "hide" prefix. */
2431
2432 if (!f.admin_user && ol->type & opt_secure)
2433 {
2434 if (no_labels)
2435 printf("%s\n", hidden);
2436 else
2437 printf("%s = %s\n", name, hidden);
2438 return TRUE;
2439 }
2440
2441 /* Else show the value of the option */
2442
2443 value = ol->value;
2444 if (options_block)
2445 {
2446 if (!(ol->type & opt_public))
2447 options_block = (void *)(((driver_instance *)options_block)->options_block);
2448 value = (void *)(US options_block + (long int)value);
2449 }
2450
2451 switch(ol->type & opt_mask)
2452 {
2453 case opt_stringptr:
2454 case opt_rewrite: /* Show the text value */
2455 s = *(USS value);
2456 if (!no_labels) printf("%s = ", name);
2457 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2458 break;
2459
2460 case opt_int:
2461 if (!no_labels) printf("%s = ", name);
2462 printf("%d\n", *((int *)value));
2463 break;
2464
2465 case opt_mkint:
2466 {
2467 int x = *((int *)value);
2468 if (x != 0 && (x & 1023) == 0)
2469 {
2470 int c = 'K';
2471 x >>= 10;
2472 if ((x & 1023) == 0)
2473 {
2474 c = 'M';
2475 x >>= 10;
2476 }
2477 if (!no_labels) printf("%s = ", name);
2478 printf("%d%c\n", x, c);
2479 }
2480 else
2481 {
2482 if (!no_labels) printf("%s = ", name);
2483 printf("%d\n", x);
2484 }
2485 }
2486 break;
2487
2488 case opt_Kint:
2489 {
2490 int_eximarith_t x = *((int_eximarith_t *)value);
2491 if (!no_labels) printf("%s = ", name);
2492 if (x == 0) printf("0\n");
2493 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2494 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2495 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2496 else printf(PR_EXIM_ARITH "K\n", x);
2497 }
2498 break;
2499
2500 case opt_octint:
2501 if (!no_labels) printf("%s = ", name);
2502 printf("%#o\n", *((int *)value));
2503 break;
2504
2505 /* Can be negative only when "unset", in which case integer */
2506
2507 case opt_fixed:
2508 {
2509 int x = *((int *)value);
2510 int f = x % 1000;
2511 int d = 100;
2512 if (x < 0) printf("%s =\n", name); else
2513 {
2514 if (!no_labels) printf("%s = ", name);
2515 printf("%d.", x/1000);
2516 do
2517 {
2518 printf("%d", f/d);
2519 f %= d;
2520 d /= 10;
2521 }
2522 while (f != 0);
2523 printf("\n");
2524 }
2525 }
2526 break;
2527
2528 /* If the numerical value is unset, try for the string value */
2529
2530 case opt_expand_uid:
2531 if (! *get_set_flag(name, oltop, last, options_block))
2532 {
2533 sprintf(CS name2, "*expand_%.50s", name);
2534 if ((ol2 = find_option(name2, oltop, last)))
2535 {
2536 void *value2 = ol2->value;
2537 if (options_block)
2538 value2 = (void *)(US options_block + (long int)value2);
2539 s = *(USS value2);
2540 if (!no_labels) printf("%s = ", name);
2541 printf("%s\n", s ? string_printing(s) : US"");
2542 break;
2543 }
2544 }
2545
2546 /* Else fall through */
2547
2548 case opt_uid:
2549 if (!no_labels) printf("%s = ", name);
2550 if (! *get_set_flag(name, oltop, last, options_block))
2551 printf("\n");
2552 else
2553 if ((pw = getpwuid(*((uid_t *)value))))
2554 printf("%s\n", pw->pw_name);
2555 else
2556 printf("%ld\n", (long int)(*((uid_t *)value)));
2557 break;
2558
2559 /* If the numerical value is unset, try for the string value */
2560
2561 case opt_expand_gid:
2562 if (! *get_set_flag(name, oltop, last, options_block))
2563 {
2564 sprintf(CS name2, "*expand_%.50s", name);
2565 if ( (ol2 = find_option(name2, oltop, last))
2566 && (ol2->type & opt_mask) == opt_stringptr)
2567 {
2568 void *value2 = ol2->value;
2569 if (options_block)
2570 value2 = (void *)(US options_block + (long int)value2);
2571 s = *(USS value2);
2572 if (!no_labels) printf("%s = ", name);
2573 printf("%s\n", s ? string_printing(s) : US"");
2574 break;
2575 }
2576 }
2577
2578 /* Else fall through */
2579
2580 case opt_gid:
2581 if (!no_labels) printf("%s = ", name);
2582 if (! *get_set_flag(name, oltop, last, options_block))
2583 printf("\n");
2584 else
2585 if ((gr = getgrgid(*((int *)value))))
2586 printf("%s\n", gr->gr_name);
2587 else
2588 printf("%ld\n", (long int)(*((int *)value)));
2589 break;
2590
2591 case opt_uidlist:
2592 uidlist = *((uid_t **)value);
2593 if (!no_labels) printf("%s =", name);
2594 if (uidlist)
2595 {
2596 uschar sep = no_labels ? '\0' : ' ';
2597 for (int i = 1; i <= (int)(uidlist[0]); i++)
2598 {
2599 uschar *name = NULL;
2600 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2601 if (sep != '\0') printf("%c", sep);
2602 if (name) printf("%s", name);
2603 else printf("%ld", (long int)(uidlist[i]));
2604 sep = ':';
2605 }
2606 }
2607 printf("\n");
2608 break;
2609
2610 case opt_gidlist:
2611 gidlist = *((gid_t **)value);
2612 if (!no_labels) printf("%s =", name);
2613 if (gidlist)
2614 {
2615 uschar sep = no_labels ? '\0' : ' ';
2616 for (int i = 1; i <= (int)(gidlist[0]); i++)
2617 {
2618 uschar *name = NULL;
2619 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2620 if (sep != '\0') printf("%c", sep);
2621 if (name) printf("%s", name);
2622 else printf("%ld", (long int)(gidlist[i]));
2623 sep = ':';
2624 }
2625 }
2626 printf("\n");
2627 break;
2628
2629 case opt_time:
2630 if (!no_labels) printf("%s = ", name);
2631 printf("%s\n", readconf_printtime(*((int *)value)));
2632 break;
2633
2634 case opt_timelist:
2635 {
2636 int *list = (int *)value;
2637 if (!no_labels) printf("%s = ", name);
2638 for (int i = 0; i < list[1]; i++)
2639 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2640 printf("\n");
2641 }
2642 break;
2643
2644 case opt_bit:
2645 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2646 "" : "no_", name);
2647 break;
2648
2649 case opt_expand_bool:
2650 sprintf(CS name2, "*expand_%.50s", name);
2651 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2652 {
2653 void *value2 = ol2->value;
2654 if (options_block)
2655 value2 = (void *)(US options_block + (long int)value2);
2656 s = *(USS value2);
2657 if (s)
2658 {
2659 if (!no_labels) printf("%s = ", name);
2660 printf("%s\n", string_printing(s));
2661 break;
2662 }
2663 /* s == NULL => string not set; fall through */
2664 }
2665
2666 /* Fall through */
2667
2668 case opt_bool:
2669 case opt_bool_verify:
2670 case opt_bool_set:
2671 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2672 break;
2673
2674 case opt_func:
2675 {
2676 void (*fn)() = ol->value;
2677 fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2678 break;
2679 }
2680 }
2681 return TRUE;
2682 }
2683
2684
2685
2686 /*************************************************
2687 * Print value from main configuration *
2688 *************************************************/
2689
2690 /* This function, called as a result of encountering the -bP option,
2691 causes the value of any main configuration variable to be output if the
2692 second argument is NULL. There are some special values:
2693
2694 all print all main configuration options
2695 config_file print the name of the configuration file
2696 (configure_file will still work, for backward
2697 compatibility)
2698 routers print the routers' configurations
2699 transports print the transports' configuration
2700 authenticators print the authenticators' configuration
2701 macros print the macros' configuration
2702 router_list print a list of router names
2703 transport_list print a list of transport names
2704 authenticator_list print a list of authentication mechanism names
2705 macro_list print a list of macro names
2706 +name print a named list item
2707 local_scan print the local_scan options
2708 config print the configuration as it is parsed
2709 environment print the used execution environment
2710
2711 If the second argument is not NULL, it must be one of "router", "transport",
2712 "authenticator" or "macro" in which case the first argument identifies the
2713 driver whose options are to be printed.
2714
2715 Arguments:
2716 name option name if type == NULL; else driver name
2717 type NULL or driver type name, as described above
2718 no_labels avoid the "foo = " at the start of an item
2719
2720 Returns: Boolean success
2721 */
2722
2723 BOOL
2724 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2725 {
2726 BOOL names_only = FALSE;
2727 optionlist *ol2 = NULL;
2728 driver_instance *d = NULL;
2729 int size = 0;
2730
2731 if (!type)
2732 {
2733 if (*name == '+')
2734 {
2735 tree_node *t;
2736 BOOL found = FALSE;
2737 static uschar *types[] = { US"address", US"domain", US"host",
2738 US"localpart" };
2739 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2740 &hostlist_anchor, &localpartlist_anchor };
2741
2742 for (int i = 0; i < 4; i++)
2743 if ((t = tree_search(*(anchors[i]), name+1)))
2744 {
2745 found = TRUE;
2746 if (no_labels)
2747 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2748 else
2749 printf("%slist %s = %s\n", types[i], name+1,
2750 ((namedlist_block *)(t->data.ptr))->string);
2751 }
2752
2753 if (!found)
2754 printf("no address, domain, host, or local part list called \"%s\" "
2755 "exists\n", name+1);
2756
2757 return found;
2758 }
2759
2760 if ( Ustrcmp(name, "configure_file") == 0
2761 || Ustrcmp(name, "config_file") == 0)
2762 {
2763 printf("%s\n", CS config_main_filename);
2764 return TRUE;
2765 }
2766
2767 if (Ustrcmp(name, "all") == 0)
2768 {
2769 for (optionlist * ol = optionlist_config;
2770 ol < optionlist_config + nelem(optionlist_config); ol++)
2771 if (!(ol->type & opt_hidden))
2772 (void) print_ol(ol, US ol->name, NULL,
2773 optionlist_config, nelem(optionlist_config),
2774 no_labels);
2775 return TRUE;
2776 }
2777
2778 if (Ustrcmp(name, "local_scan") == 0)
2779 {
2780 #ifndef LOCAL_SCAN_HAS_OPTIONS
2781 printf("local_scan() options are not supported\n");
2782 return FALSE;
2783 #else
2784 for (optionlist * ol = local_scan_options;
2785 ol < local_scan_options + local_scan_options_count; ol++)
2786 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2787 local_scan_options_count, no_labels);
2788 return TRUE;
2789 #endif
2790 }
2791
2792 if (Ustrcmp(name, "config") == 0)
2793 {
2794 print_config(f.admin_user, no_labels);
2795 return TRUE;
2796 }
2797
2798 if (Ustrcmp(name, "routers") == 0)
2799 {
2800 type = US"router";
2801 name = NULL;
2802 }
2803 else if (Ustrcmp(name, "transports") == 0)
2804 {
2805 type = US"transport";
2806 name = NULL;
2807 }
2808 else if (Ustrcmp(name, "authenticators") == 0)
2809 {
2810 type = US"authenticator";
2811 name = NULL;
2812 }
2813 else if (Ustrcmp(name, "macros") == 0)
2814 {
2815 type = US"macro";
2816 name = NULL;
2817 }
2818 else if (Ustrcmp(name, "router_list") == 0)
2819 {
2820 type = US"router";
2821 name = NULL;
2822 names_only = TRUE;
2823 }
2824 else if (Ustrcmp(name, "transport_list") == 0)
2825 {
2826 type = US"transport";
2827 name = NULL;
2828 names_only = TRUE;
2829 }
2830 else if (Ustrcmp(name, "authenticator_list") == 0)
2831 {
2832 type = US"authenticator";
2833 name = NULL;
2834 names_only = TRUE;
2835 }
2836 else if (Ustrcmp(name, "macro_list") == 0)
2837 {
2838 type = US"macro";
2839 name = NULL;
2840 names_only = TRUE;
2841 }
2842 else if (Ustrcmp(name, "environment") == 0)
2843 {
2844 if (environ)
2845 {
2846 uschar ** p;
2847 for (p = USS environ; *p; p++) ;
2848 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2849
2850 for (p = USS environ; *p; p++)
2851 {
2852 uschar * q;
2853 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2854 puts(CS *p);
2855 }
2856 }
2857 return TRUE;
2858 }
2859
2860 else
2861 return print_ol(find_option(name,
2862 optionlist_config, nelem(optionlist_config)),
2863 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2864 }
2865
2866 /* Handle the options for a router or transport. Skip options that are flagged
2867 as hidden. Some of these are options with names starting with '*', used for
2868 internal alternative representations of other options (which the printing
2869 function will sort out). Others are synonyms kept for backward compatibility.
2870 */
2871
2872 if (Ustrcmp(type, "router") == 0)
2873 {
2874 d = (driver_instance *)routers;
2875 ol2 = optionlist_routers;
2876 size = optionlist_routers_size;
2877 }
2878 else if (Ustrcmp(type, "transport") == 0)
2879 {
2880 d = (driver_instance *)transports;
2881 ol2 = optionlist_transports;
2882 size = optionlist_transports_size;
2883 }
2884 else if (Ustrcmp(type, "authenticator") == 0)
2885 {
2886 d = (driver_instance *)auths;
2887 ol2 = optionlist_auths;
2888 size = optionlist_auths_size;
2889 }
2890
2891 else if (Ustrcmp(type, "macro") == 0)
2892 {
2893 /* People store passwords in macros and they were previously not available
2894 for printing. So we have an admin_users restriction. */
2895 if (!f.admin_user)
2896 {
2897 fprintf(stderr, "exim: permission denied\n");
2898 return FALSE;
2899 }
2900 for (macro_item * m = macros; m; m = m->next)
2901 if (!name || Ustrcmp(name, m->name) == 0)
2902 {
2903 if (names_only)
2904 printf("%s\n", CS m->name);
2905 else if (no_labels)
2906 printf("%s\n", CS m->replacement);
2907 else
2908 printf("%s=%s\n", CS m->name, CS m->replacement);
2909 if (name)
2910 return TRUE;
2911 }
2912 if (!name) return TRUE;
2913
2914 printf("%s %s not found\n", type, name);
2915 return FALSE;
2916 }
2917
2918 if (names_only)
2919 {
2920 for (; d; d = d->next) printf("%s\n", CS d->name);
2921 return TRUE;
2922 }
2923
2924 /* Either search for a given driver, or print all of them */
2925
2926 for (; d; d = d->next)
2927 {
2928 BOOL rc = FALSE;
2929 if (!name)
2930 printf("\n%s %s:\n", d->name, type);
2931 else if (Ustrcmp(d->name, name) != 0) continue;
2932
2933 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2934 if (!(ol->type & opt_hidden))
2935 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2936
2937 for (optionlist * ol = d->info->options;
2938 ol < d->info->options + *(d->info->options_count); ol++)
2939 if (!(ol->type & opt_hidden))
2940 rc |= print_ol(ol, US ol->name, d, d->info->options,
2941 *d->info->options_count, no_labels);
2942
2943 if (name) return rc;
2944 }
2945 if (!name) return TRUE;
2946
2947 printf("%s %s not found\n", type, name);
2948 return FALSE;
2949 }
2950
2951
2952
2953 /*************************************************
2954 * Read a named list item *
2955 *************************************************/
2956
2957 /* This function reads a name and a list (i.e. string). The name is used to
2958 save the list in a tree, sorted by its name. Each entry also has a number,
2959 which can be used for caching tests, but if the string contains any expansion
2960 items other than $key, the number is set negative to inhibit caching. This
2961 mechanism is used for domain, host, and address lists that are referenced by
2962 the "+name" syntax.
2963
2964 Arguments:
2965 anchorp points to the tree anchor
2966 numberp points to the current number for this tree
2967 max the maximum number permitted
2968 s the text of the option line, starting immediately after the name
2969 of the list type
2970 tname the name of the list type, for messages
2971
2972 Returns: nothing
2973 */
2974
2975 static void
2976 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2977 uschar *tname)
2978 {
2979 BOOL forcecache = FALSE;
2980 uschar *ss;
2981 tree_node *t;
2982 namedlist_block *nb = store_get(sizeof(namedlist_block));
2983
2984 if (Ustrncmp(s, "_cache", 6) == 0)
2985 {
2986 forcecache = TRUE;
2987 s += 6;
2988 }
2989
2990 if (!isspace(*s))
2991 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2992
2993 if (*numberp >= max)
2994 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2995 tname, max);
2996
2997 while (isspace(*s)) s++;
2998 ss = s;
2999 while (isalnum(*s) || *s == '_') s++;
3000 t = store_get(sizeof(tree_node) + s-ss);
3001 Ustrncpy(t->name, ss, s-ss);
3002 t->name[s-ss] = 0;
3003 while (isspace(*s)) s++;
3004
3005 if (!tree_insertnode(anchorp, t))
3006 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3007 "duplicate name \"%s\" for a named %s", t->name, tname);
3008
3009 t->data.ptr = nb;
3010 nb->number = *numberp;
3011 *numberp += 1;
3012
3013 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3014 "missing '=' after \"%s\"", t->name);
3015 while (isspace(*s)) s++;
3016 nb->string = read_string(s, t->name);
3017 nb->cache_data = NULL;
3018
3019 /* Check the string for any expansions; if any are found, mark this list
3020 uncacheable unless the user has explicited forced caching. */
3021
3022 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3023 }
3024
3025
3026
3027
3028 /*************************************************
3029 * Unpick data for a rate limit *
3030 *************************************************/
3031
3032 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3033 separate values.
3034
3035 Arguments:
3036 s string, in the form t,b,f,l
3037 where t is the threshold (integer)
3038 b is the initial delay (time)
3039 f is the multiplicative factor (fixed point)
3040 k is the maximum time (time)
3041 threshold where to store threshold
3042 base where to store base in milliseconds
3043 factor where to store factor in milliseconds
3044 limit where to store limit
3045
3046 Returns: nothing (panics on error)
3047 */
3048
3049 static void
3050 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3051 int *limit)
3052 {
3053 uschar bstring[16], lstring[16];
3054
3055 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3056 factor, lstring) == 4)
3057 {
3058 *base = readconf_readtime(bstring, 0, TRUE);
3059 *limit = readconf_readtime(lstring, 0, TRUE);
3060 if (*base >= 0 && *limit >= 0) return;
3061 }
3062 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3063 }
3064
3065
3066
3067
3068 /*************************************************
3069 * Drop privs for checking TLS config *
3070 *************************************************/
3071
3072 /* We want to validate TLS options during readconf, but do not want to be
3073 root when we call into the TLS library, in case of library linkage errors
3074 which cause segfaults; before this check, those were always done as the Exim
3075 runtime user and it makes sense to continue with that.
3076
3077 Assumes: tls_require_ciphers has been set, if it will be
3078 exim_user has been set, if it will be
3079 exim_group has been set, if it will be
3080
3081 Returns: bool for "okay"; false will cause caller to immediately exit.
3082 */
3083
3084 #ifdef SUPPORT_TLS
3085 static BOOL
3086 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3087 {
3088 const uschar *errmsg;
3089 pid_t pid;
3090 int rc, status;
3091 void (*oldsignal)(int);
3092
3093 /* If TLS will never be used, no point checking ciphers */
3094
3095 if ( !tls_advertise_hosts
3096 || !*tls_advertise_hosts
3097 || Ustrcmp(tls_advertise_hosts, ":") == 0
3098 )
3099 return TRUE;
3100 else if (!nowarn && !tls_certificate)
3101 log_write(0, LOG_MAIN,
3102 "Warning: No server certificate defined; will use a selfsigned one.\n"
3103 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3104
3105 oldsignal = signal(SIGCHLD, SIG_DFL);
3106
3107 fflush(NULL);
3108 if ((pid = fork()) < 0)
3109 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3110
3111 if (pid == 0)
3112 {
3113 /* in some modes, will have dropped privilege already */
3114 if (!geteuid())
3115 exim_setugid(exim_uid, exim_gid, FALSE,
3116 US"calling tls_validate_require_cipher");
3117
3118 if ((errmsg = tls_validate_require_cipher()))
3119 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3120 "tls_require_ciphers invalid: %s", errmsg);
3121 fflush(NULL);
3122 _exit(0);
3123 }
3124
3125 do {
3126 rc = waitpid(pid, &status, 0);
3127 } while (rc < 0 && errno == EINTR);
3128
3129 DEBUG(D_tls)
3130 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3131 (int)pid, status);
3132
3133 signal(SIGCHLD, oldsignal);
3134
3135 return status == 0;
3136 }
3137 #endif /* SUPPORT_TLS */
3138
3139
3140
3141
3142 /*************************************************
3143 * Read main configuration options *
3144 *************************************************/
3145
3146 /* This function is the first to be called for configuration reading. It
3147 opens the configuration file and reads general configuration settings until
3148 it reaches the end of the configuration section. The file is then left open so
3149 that the remaining configuration data can subsequently be read if needed for
3150 this run of Exim.
3151
3152 The configuration file must be owned either by root or exim, and be writeable
3153 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3154 in the config file, so the test is done on the compiled in values. A slight
3155 anomaly, to be carefully documented.
3156
3157 The name of the configuration file is taken from a list that is included in the
3158 binary of Exim. It can be altered from the command line, but if that is done,
3159 root privilege is immediately withdrawn unless the caller is root or exim.
3160 The first file on the list that exists is used.
3161
3162 For use on multiple systems that share file systems, first look for a
3163 configuration file whose name has the current node name on the end. If that is
3164 not found, try the generic name. For really contorted configurations, that run
3165 multiple Exims with different uid settings, first try adding the effective uid
3166 before the node name. These complications are going to waste resources on most
3167 systems. Therefore they are available only when requested by compile-time
3168 options. */
3169
3170 void
3171 readconf_main(BOOL nowarn)
3172 {
3173 int sep = 0;
3174 struct stat statbuf;
3175 uschar *s, *filename;
3176 const uschar *list = config_main_filelist;
3177
3178 /* Loop through the possible file names */
3179
3180 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3181 {
3182
3183 /* Cut out all the fancy processing unless specifically wanted */
3184
3185 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3186 uschar *suffix = filename + Ustrlen(filename);
3187
3188 /* Try for the node-specific file if a node name exists */
3189
3190 #ifdef CONFIGURE_FILE_USE_NODE
3191 struct utsname uts;
3192 if (uname(&uts) >= 0)
3193 {
3194 #ifdef CONFIGURE_FILE_USE_EUID
3195 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3196 config_file = Ufopen(filename, "rb");
3197 if (config_file == NULL)
3198 #endif /* CONFIGURE_FILE_USE_EUID */
3199 {
3200 sprintf(CS suffix, ".%.256s", uts.nodename);
3201 config_file = Ufopen(filename, "rb");
3202 }
3203 }
3204 #endif /* CONFIGURE_FILE_USE_NODE */
3205
3206 /* Otherwise, try the generic name, possibly with the euid added */
3207
3208 #ifdef CONFIGURE_FILE_USE_EUID
3209 if (config_file == NULL)
3210 {
3211 sprintf(CS suffix, ".%ld", (long int)original_euid);
3212 config_file = Ufopen(filename, "rb");
3213 }
3214 #endif /* CONFIGURE_FILE_USE_EUID */
3215
3216 /* Finally, try the unadorned name */
3217
3218 if (config_file == NULL)
3219 {
3220 *suffix = 0;
3221 config_file = Ufopen(filename, "rb");
3222 }
3223 #else /* if neither defined */
3224
3225 /* This is the common case when the fancy processing is not included. */
3226
3227 config_file = Ufopen(filename, "rb");
3228 #endif
3229
3230 /* If the file does not exist, continue to try any others. For any other
3231 error, break out (and die). */
3232
3233 if (config_file != NULL || errno != ENOENT) break;
3234 }
3235
3236 /* On success, save the name for verification; config_filename is used when
3237 logging configuration errors (it changes for .included files) whereas
3238 config_main_filename is the name shown by -bP. Failure to open a configuration
3239 file is a serious disaster. */
3240
3241 if (config_file)
3242 {
3243 uschar *last_slash = Ustrrchr(filename, '/');
3244 config_filename = config_main_filename = string_copy(filename);
3245
3246 /* The config_main_directory we need for the $config_dir expansion.
3247 config_main_filename we need for $config_file expansion.
3248 And config_dir is the directory of the current configuration, used for
3249 relative .includes. We do need to know it's name, as we change our working
3250 directory later. */
3251
3252 if (filename[0] == '/')
3253 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3254 else
3255 {
3256 /* relative configuration file name: working dir + / + basename(filename) */
3257
3258 uschar buf[PATH_MAX];
3259 gstring * g;
3260
3261 if (os_getcwd(buf, PATH_MAX) == NULL)
3262 {
3263 perror("exim: getcwd");
3264 exit(EXIT_FAILURE);
3265 }
3266 g = string_cat(NULL, buf);
3267
3268 /* If the dir does not end with a "/", append one */
3269 if (g->s[g->ptr-1] != '/')
3270 g = string_catn(g, US"/", 1);
3271
3272 /* If the config file contains a "/", extract the directory part */
3273 if (last_slash)
3274 g = string_catn(g, filename, last_slash - filename);
3275
3276 config_main_directory = string_from_gstring(g);
3277 }
3278 config_directory = config_main_directory;
3279 }
3280 else
3281 {
3282 if (filename == NULL)
3283 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3284 "%s", config_main_filelist);
3285 else
3286 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3287 "configuration file %s", filename));
3288 }
3289
3290 /* Now, once we found and opened our configuration file, we change the directory
3291 to a safe place. Later we change to $spool_directory. */
3292
3293 if (Uchdir("/") < 0)
3294 {
3295 perror("exim: chdir `/': ");
3296 exit(EXIT_FAILURE);
3297 }
3298
3299 /* Check the status of the file we have opened, if we have retained root
3300 privileges and the file isn't /dev/null (which *should* be 0666). */
3301
3302 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3303 {
3304 if (fstat(fileno(config_file), &statbuf) != 0)
3305 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3306 big_buffer);
3307
3308 if ((statbuf.st_uid != root_uid /* owner not root */
3309 #ifdef CONFIGURE_OWNER
3310 && statbuf.st_uid != config_uid /* owner not the special one */
3311 #endif
3312 ) || /* or */
3313 (statbuf.st_gid != root_gid /* group not root & */
3314 #ifdef CONFIGURE_GROUP
3315 && statbuf.st_gid != config_gid /* group not the special one */
3316 #endif
3317 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3318 /* or */
3319 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3320
3321 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3322 "wrong owner, group, or mode", big_buffer);
3323 }
3324
3325 /* Process the main configuration settings. They all begin with a lower case
3326 letter. If we see something starting with an upper case letter, it is taken as
3327 a macro definition. */
3328
3329 while ((s = get_config_line()))
3330 {
3331 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3332 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3333 "found unexpected BOM (Byte Order Mark)");
3334
3335 if (isupper(s[0]))
3336 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3337
3338 else if (Ustrncmp(s, "domainlist", 10) == 0)
3339 read_named_list(&domainlist_anchor, &domainlist_count,
3340 MAX_NAMED_LIST, s+10, US"domain list");
3341
3342 else if (Ustrncmp(s, "hostlist", 8) == 0)
3343 read_named_list(&hostlist_anchor, &hostlist_count,
3344 MAX_NAMED_LIST, s+8, US"host list");
3345
3346 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3347 read_named_list(&addresslist_anchor, &addresslist_count,
3348 MAX_NAMED_LIST, s+11, US"address list");
3349
3350 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3351 read_named_list(&localpartlist_anchor, &localpartlist_count,
3352 MAX_NAMED_LIST, s+13, US"local part list");
3353
3354 else
3355 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3356 NULL, US"main option \"%s\" unknown");
3357 }
3358
3359
3360 /* If local_sender_retain is set, local_from_check must be unset. */
3361
3362 if (local_sender_retain && local_from_check)
3363 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3364 "local_sender_retain are set; this combination is not allowed");
3365
3366 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3367 wanted. */
3368
3369 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3370
3371 /* The max retry interval must not be greater than 24 hours. */
3372
3373 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3374
3375 /* remote_max_parallel must be > 0 */
3376
3377 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3378
3379 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3380 start of a new SMTP message. */
3381
3382 freeze_tell_config = freeze_tell;
3383
3384 /* The primary host name may be required for expansion of spool_directory
3385 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3386 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3387 canonize it. Some people like upper case letters in their host names, so we
3388 don't force the case. */
3389
3390 if (primary_hostname == NULL)
3391 {
3392 const uschar *hostname;
3393 struct utsname uts;
3394 if (uname(&uts) < 0)
3395 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3396 hostname = US uts.nodename;
3397
3398 if (Ustrchr(hostname, '.') == NULL)
3399 {
3400 int af = AF_INET;
3401 struct hostent *hostdata;
3402
3403 #if HAVE_IPV6
3404 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3405 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3406 MCL_DOMAIN, TRUE, NULL) != OK))
3407 af = AF_INET6;
3408 #else
3409 af = AF_INET;
3410 #endif
3411
3412 for (;;)
3413 {
3414 #if HAVE_IPV6
3415 #if HAVE_GETIPNODEBYNAME
3416 int error_num;
3417 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3418 #else
3419 hostdata = gethostbyname2(CS hostname, af);
3420 #endif
3421 #else
3422 hostdata = gethostbyname(CS hostname);
3423 #endif
3424
3425 if (hostdata != NULL)
3426 {
3427 hostname = US hostdata->h_name;
3428 break;
3429 }
3430
3431 if (af == AF_INET) break;
3432 af = AF_INET;
3433 }
3434 }
3435
3436 primary_hostname = string_copy(hostname);
3437 }
3438
3439 /* Set up default value for smtp_active_hostname */
3440
3441 smtp_active_hostname = primary_hostname;
3442
3443 /* If spool_directory wasn't set in the build-time configuration, it must have
3444 got set above. Of course, writing to the log may not work if log_file_path is
3445 not set, but it will at least get to syslog or somewhere, with any luck. */
3446
3447 if (*spool_directory == 0)
3448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3449 "proceed");
3450
3451 /* Expand the spool directory name; it may, for example, contain the primary
3452 host name. Same comment about failure. */
3453
3454 s = expand_string(spool_directory);
3455 if (s == NULL)
3456 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3457 "\"%s\": %s", spool_directory, expand_string_message);
3458 spool_directory = s;
3459
3460 /* Expand log_file_path, which must contain "%s" in any component that isn't
3461 the null string or "syslog". It is also allowed to contain one instance of %D
3462 or %M. However, it must NOT contain % followed by anything else. */
3463
3464 if (*log_file_path != 0)
3465 {
3466 const uschar *ss, *sss;
3467 int sep = ':'; /* Fixed for log file path */
3468 s = expand_string(log_file_path);
3469 if (s == NULL)
3470 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3471 "\"%s\": %s", log_file_path, expand_string_message);
3472
3473 ss = s;
3474 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3475 {
3476 uschar *t;
3477 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3478 t = Ustrstr(sss, "%s");
3479 if (t == NULL)
3480 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3481 "contain \"%%s\"", sss);
3482 *t = 'X';
3483 t = Ustrchr(sss, '%');
3484 if (t != NULL)
3485 {
3486 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3487 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3488 "unexpected \"%%\" character", s);
3489 }
3490 }
3491
3492 log_file_path = s;
3493 }
3494
3495 /* Interpret syslog_facility into an integer argument for 'ident' param to
3496 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3497 leading "log_". */
3498
3499 if (syslog_facility_str)
3500 {
3501 int i;
3502 uschar *s = syslog_facility_str;
3503
3504 if ((Ustrlen(syslog_facility_str) >= 4) &&
3505 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3506 s += 4;
3507
3508 for (i = 0; i < syslog_list_size; i++)
3509 if (strcmpic(s, syslog_list[i].name) == 0)
3510 {
3511 syslog_facility = syslog_list[i].value;
3512 break;
3513 }
3514
3515 if (i >= syslog_list_size)
3516 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3517 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3518 }
3519
3520 /* Expand pid_file_path */
3521
3522 if (*pid_file_path != 0)
3523 {
3524 if (!(s = expand_string(pid_file_path)))
3525 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3526 "\"%s\": %s", pid_file_path, expand_string_message);
3527 pid_file_path = s;
3528 }
3529
3530 /* Set default value of process_log_path */
3531
3532 if (!process_log_path || *process_log_path =='\0')
3533 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3534
3535 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3536 message. */
3537
3538 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3539
3540 /* Unpick the SMTP rate limiting options, if set */
3541
3542 if (smtp_ratelimit_mail)
3543 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3544 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3545
3546 if (smtp_ratelimit_rcpt)
3547 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3548 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3549
3550 /* The qualify domains default to the primary host name */
3551
3552 if (!qualify_domain_sender)
3553 qualify_domain_sender = primary_hostname;
3554 if (!qualify_domain_recipient)
3555 qualify_domain_recipient = qualify_domain_sender;
3556
3557 /* Setting system_filter_user in the configuration sets the gid as well if a
3558 name is given, but a numerical value does not. */
3559
3560 if (system_filter_uid_set && !system_filter_gid_set)
3561 {
3562 struct passwd *pw = getpwuid(system_filter_uid);
3563 if (!pw)
3564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3565 (long int)system_filter_uid);
3566 system_filter_gid = pw->pw_gid;
3567 system_filter_gid_set = TRUE;
3568 }
3569
3570 /* If the errors_reply_to field is set, check that it is syntactically valid
3571 and ensure it contains a domain. */
3572
3573 if (errors_reply_to)
3574 {
3575 uschar *errmess;
3576 int start, end, domain;
3577 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3578 &start, &end, &domain, FALSE);
3579
3580 if (!recipient)
3581 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3582 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3583
3584 if (domain == 0)
3585 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3586 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3587 }
3588
3589 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3590 smtp_accept_max must also be set. */
3591
3592 if (smtp_accept_max == 0 &&
3593 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3594 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3595 "smtp_accept_max must be set if smtp_accept_queue or "
3596 "smtp_accept_max_per_host is set");
3597
3598 /* Set up the host number if anything is specified. It is an expanded string
3599 so that it can be computed from the host name, for example. We do this last
3600 so as to ensure that everything else is set up before the expansion. */
3601
3602 if (host_number_string)
3603 {
3604 long int n;
3605 uschar *end;
3606 uschar *s = expand_string(host_number_string);
3607
3608 if (!s)
3609 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3610 "failed to expand localhost_number \"%s\": %s",
3611 host_number_string, expand_string_message);
3612 n = Ustrtol(s, &end, 0);
3613 while (isspace(*end)) end++;
3614 if (*end != 0)
3615 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3616 "localhost_number value is not a number: %s", s);
3617 if (n > LOCALHOST_MAX)
3618 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3619 "localhost_number is greater than the maximum allowed value (%d)",
3620 LOCALHOST_MAX);
3621 host_number = n;
3622 }
3623
3624 #ifdef SUPPORT_TLS
3625 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3626
3627 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3628 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3629 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3630 tls_verify_hosts ? "" : "try_");
3631
3632 /* This also checks that the library linkage is working and we can call
3633 routines in it, so call even if tls_require_ciphers is unset */
3634 if (!tls_dropprivs_validate_require_cipher(nowarn))
3635 exit(1);
3636
3637 /* Magic number: at time of writing, 1024 has been the long-standing value
3638 used by so many clients, and what Exim used to use always, that it makes
3639 sense to just min-clamp this max-clamp at that. */
3640 if (tls_dh_max_bits < 1024)
3641 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3642 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3643
3644 /* If openssl_options is set, validate it */
3645 if (openssl_options)
3646 {
3647 # ifdef USE_GNUTLS
3648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3649 "openssl_options is set but we're using GnuTLS");
3650 # else
3651 long dummy;
3652 if (!tls_openssl_options_parse(openssl_options, &dummy))
3653 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3654 "openssl_options parse error: %s", openssl_options);
3655 # endif
3656 }
3657 #endif /*SUPPORT_TLS*/
3658
3659 if (!nowarn && !keep_environment && environ && *environ)
3660 log_write(0, LOG_MAIN,
3661 "Warning: purging the environment.\n"
3662 " Suggested action: use keep_environment.");
3663 }
3664
3665
3666
3667 /*************************************************
3668 * Initialize one driver *
3669 *************************************************/
3670
3671 /* This is called once the driver's generic options, if any, have been read.
3672 We can now find the driver, set up defaults for the private options, and
3673 unset any "set" bits in the private options table (which might have been
3674 set by another incarnation of the same driver).
3675
3676 Arguments:
3677 d pointer to driver instance block, with generic
3678 options filled in
3679 drivers_available vector of available drivers
3680 size_of_info size of each block in drivers_available
3681 class class of driver, for error message
3682
3683 Returns: pointer to the driver info block
3684 */
3685
3686 static driver_info *
3687 init_driver(driver_instance *d, driver_info *drivers_available,
3688 int size_of_info, uschar *class)
3689 {
3690 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3691 dd = (driver_info *)((US dd) + size_of_info))
3692 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3693 {
3694 int len = dd->options_len;
3695 d->info = dd;
3696 d->options_block = store_get(len);
3697 memcpy(d->options_block, dd->options_block, len);
3698 for (int i = 0; i < *(dd->options_count); i++)
3699 dd->options[i].type &= ~opt_set;
3700 return dd;
3701 }
3702
3703 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3704 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3705
3706 return NULL; /* never obeyed */
3707 }
3708
3709
3710
3711
3712 /*************************************************
3713 * Initialize driver list *
3714 *************************************************/
3715
3716 /* This function is called for routers, transports, and authentication
3717 mechanisms. It reads the data from the current point in the configuration file
3718 up to the end of the section, and sets up a chain of instance blocks according
3719 to the file's contents. The file will already have been opened by a call to
3720 readconf_main, and must be left open for subsequent reading of further data.
3721
3722 Any errors cause a panic crash. Note that the blocks with names driver_info and
3723 driver_instance must map the first portions of all the _info and _instance
3724 blocks for this shared code to work.
3725
3726 Arguments:
3727 class "router", "transport", or "authenticator"
3728 anchor &routers, &transports, &auths
3729 drivers_available available drivers
3730 size_of_info size of each info block
3731 instance_default points to default data for an instance
3732 instance_size size of instance block
3733 driver_optionlist generic option list
3734 driver_optionlist_count count of generic option list
3735
3736 Returns: nothing
3737 */
3738
3739 void
3740 readconf_driver_init(
3741 uschar *class,
3742 driver_instance **anchor,
3743 driver_info *drivers_available,
3744 int size_of_info,
3745 void *instance_default,
3746 int instance_size,
3747 optionlist *driver_optionlist,
3748 int driver_optionlist_count)
3749 {
3750 driver_instance **p = anchor;
3751 driver_instance *d = NULL;
3752 uschar *buffer;
3753
3754 while ((buffer = get_config_line()) != NULL)
3755 {
3756 uschar name[64];
3757 uschar *s;
3758
3759 /* Read the first name on the line and test for the start of a new driver. A
3760 macro definition indicates the end of the previous driver. If this isn't the
3761 start of a new driver, the line will be re-read. */
3762
3763 s = readconf_readname(name, sizeof(name), buffer);
3764
3765 /* Handle macro definition, first finishing off the initialization of the
3766 previous driver, if any. */
3767
3768 if (isupper(*name) && *s == '=')
3769 {
3770 if (d)
3771 {
3772 if (!d->driver_name)
3773 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3774 "no driver defined for %s \"%s\"", class, d->name);
3775 (d->info->init)(d);
3776 d = NULL;
3777 }
3778 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3779 continue;
3780 }
3781
3782 /* If the line starts with a name terminated by a colon, we are at the
3783 start of the definition of a new driver. The rest of the line must be
3784 blank. */
3785
3786 if (*s++ == ':')
3787 {
3788 /* Finish off initializing the previous driver. */
3789
3790 if (d)
3791 {
3792 if (!d->driver_name)
3793 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3794 "no driver defined for %s \"%s\"", class, d->name);
3795 (d->info->init)(d);
3796 }
3797
3798 /* Check that we haven't already got a driver of this name */
3799
3800 for (d = *anchor; d; d = d->next)
3801 if (Ustrcmp(name, d->name) == 0)
3802 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3803 "there are two %ss called \"%s\"", class, name);
3804
3805 /* Set up a new driver instance data block on the chain, with
3806 its default values installed. */
3807
3808 d = store_get(instance_size);
3809 memcpy(d, instance_default, instance_size);
3810 *p = d;
3811 p = &d->next;
3812 d->name = string_copy(name);
3813
3814 /* Clear out the "set" bits in the generic options */
3815
3816 for <