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150d7973d3ffd706374093e6d86041e8af1f6fb1
[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 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
371 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
372 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
373 #endif
374 { "trusted_groups", opt_gidlist, &trusted_groups },
375 { "trusted_users", opt_uidlist, &trusted_users },
376 { "unknown_login", opt_stringptr, &unknown_login },
377 { "unknown_username", opt_stringptr, &unknown_username },
378 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
379 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
380 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
381 { "warn_message_file", opt_stringptr, &warn_message_file },
382 { "write_rejectlog", opt_bool, &write_rejectlog }
383 };
384
385 #ifndef MACRO_PREDEF
386 static int optionlist_config_size = nelem(optionlist_config);
387 #endif
388
389
390 #ifdef MACRO_PREDEF
391
392 static void
393 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
394
395 void
396 options_main(void)
397 {
398 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
399 }
400
401 void
402 options_auths(void)
403 {
404 uschar buf[64];
405
406 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
407
408 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
409 {
410 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
411 builtin_macro_create(buf);
412 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
413 }
414 }
415
416 void
417 options_logging(void)
418 {
419 uschar buf[64];
420
421 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
422 {
423 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
424 builtin_macro_create(buf);
425 }
426 }
427
428
429 #else /*!MACRO_PREDEF*/
430
431 extern char **environ;
432
433 static void save_config_line(const uschar* line);
434 static void save_config_position(const uschar *file, int line);
435 static void print_config(BOOL admin, BOOL terse);
436
437
438 #define CSTATE_STACK_SIZE 10
439
440 const uschar *config_directory = NULL;
441
442
443 /* Structure for chain (stack) of .included files */
444
445 typedef struct config_file_item {
446 struct config_file_item *next;
447 const uschar *filename;
448 const uschar *directory;
449 FILE *file;
450 int lineno;
451 } config_file_item;
452
453 /* Structure for chain of configuration lines (-bP config) */
454
455 typedef struct config_line_item {
456 struct config_line_item *next;
457 uschar *line;
458 } config_line_item;
459
460 static config_line_item* config_lines;
461
462 /* Structure of table of conditional words and their state transitions */
463
464 typedef struct cond_item {
465 uschar *name;
466 int namelen;
467 int action1;
468 int action2;
469 int pushpop;
470 } cond_item;
471
472 /* Structure of table of syslog facility names and values */
473
474 typedef struct syslog_fac_item {
475 uschar *name;
476 int value;
477 } syslog_fac_item;
478
479 /* constants */
480 static const char * const hidden = "<value not displayable>";
481
482 /* Static variables */
483
484 static config_file_item *config_file_stack = NULL; /* For includes */
485
486 static uschar *syslog_facility_str = NULL;
487 static uschar next_section[24];
488 static uschar time_buffer[24];
489
490 /* State variables for conditional loading (.ifdef / .else / .endif) */
491
492 static int cstate = 0;
493 static int cstate_stack_ptr = -1;
494 static int cstate_stack[CSTATE_STACK_SIZE];
495
496 /* Table of state transitions for handling conditional inclusions. There are
497 four possible state transitions:
498
499 .ifdef true
500 .ifdef false
501 .elifdef true (or .else)
502 .elifdef false
503
504 .endif just causes the previous cstate to be popped off the stack */
505
506 static int next_cstate[3][4] =
507 {
508 /* State 0: reading from file, or reading until next .else or .endif */
509 { 0, 1, 2, 2 },
510 /* State 1: condition failed, skipping until next .else or .endif */
511 { 2, 2, 0, 1 },
512 /* State 2: skipping until .endif */
513 { 2, 2, 2, 2 },
514 };
515
516 /* Table of conditionals and the states to set. For each name, there are four
517 values: the length of the name (to save computing it each time), the state to
518 set if a macro was found in the line, the state to set if a macro was not found
519 in the line, and a stack manipulation setting which is:
520
521 -1 pull state value off the stack
522 0 don't alter the stack
523 +1 push value onto stack, before setting new state
524 */
525
526 static cond_item cond_list[] = {
527 { US"ifdef", 5, 0, 1, 1 },
528 { US"ifndef", 6, 1, 0, 1 },
529 { US"elifdef", 7, 2, 3, 0 },
530 { US"elifndef", 8, 3, 2, 0 },
531 { US"else", 4, 2, 2, 0 },
532 { US"endif", 5, 0, 0, -1 }
533 };
534
535 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
536
537 /* Table of syslog facility names and their values */
538
539 static syslog_fac_item syslog_list[] = {
540 { US"mail", LOG_MAIL },
541 { US"user", LOG_USER },
542 { US"news", LOG_NEWS },
543 { US"uucp", LOG_UUCP },
544 { US"local0", LOG_LOCAL0 },
545 { US"local1", LOG_LOCAL1 },
546 { US"local2", LOG_LOCAL2 },
547 { US"local3", LOG_LOCAL3 },
548 { US"local4", LOG_LOCAL4 },
549 { US"local5", LOG_LOCAL5 },
550 { US"local6", LOG_LOCAL6 },
551 { US"local7", LOG_LOCAL7 },
552 { US"daemon", LOG_DAEMON }
553 };
554
555 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
556
557
558 #define opt_fn_print BIT(0)
559 #define opt_fn_print_label BIT(1)
560
561
562 /*************************************************
563 * Find the name of an option *
564 *************************************************/
565
566 /* This function is to aid debugging. Various functions take arguments that are
567 pointer variables in the options table or in option tables for various drivers.
568 For debugging output, it is useful to be able to find the name of the option
569 which is currently being processed. This function finds it, if it exists, by
570 searching the table(s).
571
572 Arguments: a value that is presumed to be in the table above
573 Returns: the option name, or an empty string
574 */
575
576 uschar *
577 readconf_find_option(void *p)
578 {
579 for (int i = 0; i < nelem(optionlist_config); i++)
580 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
581
582 for (router_instance * r = routers; r; r = r->next)
583 {
584 router_info *ri = r->info;
585 for (int i = 0; i < *ri->options_count; i++)
586 {
587 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
588 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
589 return US ri->options[i].name;
590 }
591 }
592
593 for (transport_instance * t = transports; t; t = t->next)
594 {
595 transport_info *ti = t->info;
596 for (int i = 0; i < *ti->options_count; i++)
597 {
598 optionlist * op = &ti->options[i];
599 if ((op->type & opt_mask) != opt_stringptr) continue;
600 if (p == ( op->type & opt_public
601 ? CS t
602 : CS t->options_block
603 )
604 + (long int)op->value)
605 return US op->name;
606 }
607 }
608
609 return US"";
610 }
611
612
613
614
615 /*************************************************
616 * Deal with an assignment to a macro *
617 *************************************************/
618
619 /* We have a new definition; append to the list.
620
621 Args:
622 name Name of the macro; will be copied
623 val Expansion result for the macro; will be copied
624 */
625
626 macro_item *
627 macro_create(const uschar * name, const uschar * val, BOOL command_line)
628 {
629 macro_item * m = store_get(sizeof(macro_item));
630
631 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
632 m->next = NULL;
633 m->command_line = command_line;
634 m->namelen = Ustrlen(name);
635 m->replen = Ustrlen(val);
636 m->name = string_copy(name);
637 m->replacement = string_copy(val);
638 if (mlast)
639 mlast->next = m;
640 else
641 macros = m;
642 mlast = m;
643 if (!macros_user)
644 macros_user = m;
645 return m;
646 }
647
648
649 /* This function is called when a line that starts with an upper case letter is
650 encountered. The argument "line" should contain a complete logical line, and
651 start with the first letter of the macro name. The macro name and the
652 replacement text are extracted and stored. Redefinition of existing,
653 non-command line, macros is permitted using '==' instead of '='.
654
655 Arguments:
656 s points to the start of the logical line
657
658 Returns: FALSE iff fatal error
659 */
660
661 BOOL
662 macro_read_assignment(uschar *s)
663 {
664 uschar name[64];
665 int namelen = 0;
666 BOOL redef = FALSE;
667 macro_item *m;
668
669 while (isalnum(*s) || *s == '_')
670 {
671 if (namelen >= sizeof(name) - 1)
672 {
673 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
674 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
675 return FALSE;
676 }
677 name[namelen++] = *s++;
678 }
679 name[namelen] = 0;
680
681 while (isspace(*s)) s++;
682 if (*s++ != '=')
683 {
684 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
685 return FALSE;
686 }
687
688 if (*s == '=')
689 {
690 redef = TRUE;
691 s++;
692 }
693 while (isspace(*s)) s++;
694
695 /* If an existing macro of the same name was defined on the command line, we
696 just skip this definition. It's an error to attempt to redefine a macro without
697 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
698 It is also an error to define a macro whose name begins with the name of a
699 previously defined macro. This is the requirement that make using a tree
700 for macros hard; we must check all macros for the substring. Perhaps a
701 sorted list, and a bsearch, would work?
702 Note: it is documented that the other way round works. */
703
704 for (m = macros; m; m = m->next)
705 {
706 if (Ustrcmp(m->name, name) == 0)
707 {
708 if (!m->command_line && !redef)
709 {
710 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
711 "defined (use \"==\" if you want to redefine it)", name);
712 return FALSE;
713 }
714 break;
715 }
716
717 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
718 {
719 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
720 "a macro because previously defined macro \"%s\" is a substring",
721 name, m->name);
722 return FALSE;
723 }
724
725 /* We cannot have this test, because it is documented that a substring
726 macro is permitted (there is even an example).
727 *
728 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
729 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
730 * "a macro because it is a substring of previously defined macro \"%s\"",
731 * name, m->name);
732 */
733 }
734
735 /* Check for an overriding command-line definition. */
736
737 if (m && m->command_line) return TRUE;
738
739 /* Redefinition must refer to an existing macro. */
740
741 if (redef)
742 if (m)
743 {
744 m->replen = Ustrlen(s);
745 m->replacement = string_copy(s);
746 }
747 else
748 {
749 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
750 "\"%s\"", name);
751 return FALSE;
752 }
753
754 /* We have a new definition. */
755 else
756 (void) macro_create(name, s, FALSE);
757 return TRUE;
758 }
759
760
761
762
763
764 /* Process line for macros. The line is in big_buffer starting at offset len.
765 Expand big_buffer if needed. Handle definitions of new macros, and
766 macro expansions, rewriting the line in the buffer.
767
768 Arguments:
769 len Offset in buffer of start of line
770 newlen Pointer to offset of end of line, updated on return
771 macro_found Pointer to return that a macro was expanded
772
773 Return: pointer to first nonblank char in line
774 */
775
776 uschar *
777 macros_expand(int len, int * newlen, BOOL * macro_found)
778 {
779 uschar * ss = big_buffer + len;
780 uschar * s;
781
782 /* Find the true start of the physical line - leading spaces are always
783 ignored. */
784
785 while (isspace(*ss)) ss++;
786
787 /* Process the physical line for macros. If this is the start of the logical
788 line, skip over initial text at the start of the line if it starts with an
789 upper case character followed by a sequence of name characters and an equals
790 sign, because that is the definition of a new macro, and we don't do
791 replacement therein. */
792
793 s = ss;
794 if (len == 0 && isupper(*s))
795 {
796 while (isalnum(*s) || *s == '_') s++;
797 while (isspace(*s)) s++;
798 if (*s != '=') s = ss; /* Not a macro definition */
799 }
800
801 /* Skip leading chars which cannot start a macro name, to avoid multiple
802 pointless rescans in Ustrstr calls. */
803
804 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
805
806 /* For each defined macro, scan the line (from after XXX= if present),
807 replacing all occurrences of the macro. */
808
809 *macro_found = FALSE;
810 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
811 {
812 uschar * p, *pp;
813 uschar * t;
814
815 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
816 if (!*s) break;
817
818 t = s;
819 while ((p = Ustrstr(t, m->name)) != NULL)
820 {
821 int moveby;
822
823 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
824 m->name, (int) Ustrlen(ss)-1, ss);
825 /* Expand the buffer if necessary */
826
827 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
828 {
829 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
830 uschar *newbuffer = store_malloc(newsize);
831 memcpy(newbuffer, big_buffer, *newlen + 1);
832 p = newbuffer + (p - big_buffer);
833 s = newbuffer + (s - big_buffer);
834 ss = newbuffer + (ss - big_buffer);
835 t = newbuffer + (t - big_buffer);
836 big_buffer_size = newsize;
837 store_free(big_buffer);
838 big_buffer = newbuffer;
839 }
840
841 /* Shuffle the remaining characters up or down in the buffer before
842 copying in the replacement text. Don't rescan the replacement for this
843 same macro. */
844
845 pp = p + m->namelen;
846 if ((moveby = m->replen - m->namelen) != 0)
847 {
848 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
849 *newlen += moveby;
850 }
851 Ustrncpy(p, m->replacement, m->replen);
852 t = p + m->replen;
853 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
854 *macro_found = TRUE;
855 }
856 }
857
858 /* An empty macro replacement at the start of a line could mean that ss no
859 longer points to the first non-blank character. */
860
861 while (isspace(*ss)) ss++;
862 return ss;
863 }
864
865 /*************************************************
866 * Read configuration line *
867 *************************************************/
868
869 /* A logical line of text is read from the configuration file into the big
870 buffer, taking account of macros, .includes, and continuations. The size of
871 big_buffer is increased if necessary. The count of configuration lines is
872 maintained. Physical input lines starting with # (ignoring leading white space,
873 and after macro replacement) and empty logical lines are always ignored.
874 Leading and trailing spaces are removed.
875
876 If we hit a line of the form "begin xxxx", the xxxx is placed in the
877 next_section vector, and the function returns NULL, indicating the end of a
878 configuration section. On end-of-file, NULL is returned with next_section
879 empty.
880
881 Arguments: none
882
883 Returns: a pointer to the first non-blank in the line,
884 or NULL if eof or end of section is reached
885 */
886
887 static uschar *
888 get_config_line(void)
889 {
890 int startoffset = 0; /* To first non-blank char in logical line */
891 int len = 0; /* Of logical line so far */
892 int newlen;
893 uschar *s, *ss;
894 BOOL macro_found;
895
896 /* Loop for handling continuation lines, skipping comments, and dealing with
897 .include files. */
898
899 for (;;)
900 {
901 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
902 {
903 if (config_file_stack != NULL) /* EOF inside .include */
904 {
905 (void)fclose(config_file);
906 config_file = config_file_stack->file;
907 config_filename = config_file_stack->filename;
908 config_directory = config_file_stack->directory;
909 config_lineno = config_file_stack->lineno;
910 config_file_stack = config_file_stack->next;
911 if (config_lines)
912 save_config_position(config_filename, config_lineno);
913 continue;
914 }
915
916 /* EOF at top level */
917
918 if (cstate_stack_ptr >= 0)
919 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
920 "Unexpected end of configuration file: .endif missing");
921
922 if (len != 0) break; /* EOF after continuation */
923 next_section[0] = 0; /* EOF at start of logical line */
924 return NULL;
925 }
926
927 config_lineno++;
928 newlen = len + Ustrlen(big_buffer + len);
929
930 if (config_lines && config_lineno == 1)
931 save_config_position(config_filename, config_lineno);
932
933 /* Handle pathologically long physical lines - yes, it did happen - by
934 extending big_buffer at this point. The code also copes with very long
935 logical lines. */
936
937 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
938 {
939 uschar *newbuffer;
940 big_buffer_size += BIG_BUFFER_SIZE;
941 newbuffer = store_malloc(big_buffer_size);
942
943 /* This use of strcpy is OK because we know that the string in the old
944 buffer is shorter than the new buffer. */
945
946 Ustrcpy(newbuffer, big_buffer);
947 store_free(big_buffer);
948 big_buffer = newbuffer;
949 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
950 break;
951 newlen += Ustrlen(big_buffer + newlen);
952 }
953
954 ss = macros_expand(len, &newlen, &macro_found);
955
956 /* Check for comment lines - these are physical lines. */
957
958 if (*ss == '#') continue;
959
960 /* Handle conditionals, which are also applied to physical lines. Conditions
961 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
962 expansion occurred on the rest of the line. A preliminary test for the leading
963 '.' saves effort on most lines. */
964
965 if (*ss == '.')
966 {
967 int i;
968
969 /* Search the list of conditional directives */
970
971 for (i = 0; i < cond_list_size; i++)
972 {
973 int n;
974 cond_item *c = cond_list+i;
975 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
976
977 /* The following character must be white space or end of string */
978
979 n = ss[1 + c->namelen];
980 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
981
982 /* .ifdef and .ifndef push the current state onto the stack, then set
983 a new one from the table. Stack overflow is an error */
984
985 if (c->pushpop > 0)
986 {
987 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
989 ".%s nested too deeply", c->name);
990 cstate_stack[++cstate_stack_ptr] = cstate;
991 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
992 }
993
994 /* For any of the others, stack underflow is an error. The next state
995 comes either from the stack (.endif) or from the table. */
996
997 else
998 {
999 if (cstate_stack_ptr < 0)
1000 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1001 ".%s without matching .ifdef", c->name);
1002 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1003 next_cstate[cstate][macro_found? c->action1 : c->action2];
1004 }
1005
1006 /* Having dealt with a directive, break the loop */
1007
1008 break;
1009 }
1010
1011 /* If we have handled a conditional directive, continue with the next
1012 physical line. Otherwise, fall through. */
1013
1014 if (i < cond_list_size) continue;
1015 }
1016
1017 /* If the conditional state is not 0 (actively using these lines), ignore
1018 this input line. */
1019
1020 if (cstate != 0) continue; /* Conditional skip */
1021
1022 /* Handle .include lines - these are also physical lines. */
1023
1024 if (Ustrncmp(ss, ".include", 8) == 0 &&
1025 (isspace(ss[8]) ||
1026 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1027 {
1028 uschar *t;
1029 int include_if_exists = isspace(ss[8])? 0 : 10;
1030 config_file_item *save;
1031 struct stat statbuf;
1032
1033 ss += 9 + include_if_exists;
1034 while (isspace(*ss)) ss++;
1035 t = ss + Ustrlen(ss);
1036 while (t > ss && isspace(t[-1])) t--;
1037 if (*ss == '\"' && t[-1] == '\"')
1038 {
1039 ss++;
1040 t--;
1041 }
1042 *t = 0;
1043
1044 /* We allow relative file names. For security reasons currently
1045 relative names not allowed with .include_if_exists. For .include_if_exists
1046 we need to check the permissions/ownership of the containing folder */
1047 if (*ss != '/')
1048 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1049 "absolute path \"%s\"", ss);
1050 else
1051 {
1052 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1053 ss = string_from_gstring(g);
1054 }
1055
1056 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1057
1058 if (config_lines)
1059 save_config_position(config_filename, config_lineno);
1060 save = store_get(sizeof(config_file_item));
1061 save->next = config_file_stack;
1062 config_file_stack = save;
1063 save->file = config_file;
1064 save->filename = config_filename;
1065 save->directory = config_directory;
1066 save->lineno = config_lineno;
1067
1068 if (!(config_file = Ufopen(ss, "rb")))
1069 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1070 "configuration file %s", ss);
1071
1072 config_filename = string_copy(ss);
1073 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1074 config_lineno = 0;
1075 continue;
1076 }
1077
1078 /* If this is the start of the logical line, remember where the non-blank
1079 data starts. Otherwise shuffle down continuation lines to remove leading
1080 white space. */
1081
1082 if (len == 0)
1083 startoffset = ss - big_buffer;
1084 else
1085 {
1086 s = big_buffer + len;
1087 if (ss > s)
1088 {
1089 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1090 newlen -= ss - s;
1091 }
1092 }
1093
1094 /* Accept the new addition to the line. Remove trailing white space. */
1095
1096 len = newlen;
1097 while (len > 0 && isspace(big_buffer[len-1])) len--;
1098 big_buffer[len] = 0;
1099
1100 /* We are done if the line does not end in backslash and contains some data.
1101 Empty logical lines are ignored. For continuations, remove the backslash and
1102 go round the loop to read the continuation line. */
1103
1104 if (len > 0)
1105 {
1106 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1107 big_buffer[--len] = 0; /* Remove backslash */
1108 }
1109 } /* Loop for reading multiple physical lines */
1110
1111 /* We now have a logical line. Test for the end of a configuration section (or,
1112 more accurately, for the start of the next section). Place the name of the next
1113 section in next_section, and return NULL. If the name given is longer than
1114 next_section, truncate it. It will be unrecognized later, because all the known
1115 section names do fit. Leave space for pluralizing. */
1116
1117 s = big_buffer + startoffset; /* First non-space character */
1118
1119 if (config_lines)
1120 save_config_line(s);
1121
1122 if (strncmpic(s, US"begin ", 6) == 0)
1123 {
1124 s += 6;
1125 while (isspace(*s)) s++;
1126 if (big_buffer + len - s > sizeof(next_section) - 2)
1127 s[sizeof(next_section) - 2] = 0;
1128 Ustrcpy(next_section, s);
1129 return NULL;
1130 }
1131
1132 /* Return the first non-blank character. */
1133
1134 return s;
1135 }
1136
1137
1138
1139 /*************************************************
1140 * Read a name *
1141 *************************************************/
1142
1143 /* The yield is the pointer to the next uschar. Names longer than the
1144 output space are silently truncated. This function is also used from acl.c when
1145 parsing ACLs.
1146
1147 Arguments:
1148 name where to put the name
1149 len length of name
1150 s input pointer
1151
1152 Returns: new input pointer
1153 */
1154
1155 uschar *
1156 readconf_readname(uschar *name, int len, uschar *s)
1157 {
1158 int p = 0;
1159 while (isspace(*s)) s++;
1160 if (isalpha(*s))
1161 {
1162 while (isalnum(*s) || *s == '_')
1163 {
1164 if (p < len-1) name[p++] = *s;
1165 s++;
1166 }
1167 }
1168 name[p] = 0;
1169 while (isspace(*s)) s++;
1170 return s;
1171 }
1172
1173
1174
1175
1176 /*************************************************
1177 * Read a time value *
1178 *************************************************/
1179
1180 /* This function is also called from outside, to read argument
1181 time values. The format of a time value is:
1182
1183 [<n>w][<n>d][<n>h][<n>m][<n>s]
1184
1185 as long as at least one is present. If a format error is encountered,
1186 return a negative value. The value must be terminated by the given
1187 terminator.
1188
1189 Arguments:
1190 s input pointer
1191 terminator required terminating character
1192 return_msec if TRUE, allow fractional seconds and return milliseconds
1193
1194 Returns: the time value, or -1 on syntax error
1195 value is seconds if return_msec is FALSE
1196 value is milliseconds if return_msec is TRUE
1197 */
1198
1199 int
1200 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1201 {
1202 int yield = 0;
1203 for (;;)
1204 {
1205 int value, count;
1206 double fraction;
1207
1208 if (!isdigit(*s)) return -1;
1209 (void)sscanf(CCS s, "%d%n", &value, &count);
1210 s += count;
1211
1212 switch (*s)
1213 {
1214 case 'w': value *= 7;
1215 case 'd': value *= 24;
1216 case 'h': value *= 60;
1217 case 'm': value *= 60;
1218 case 's': s++;
1219 break;
1220
1221 case '.':
1222 if (!return_msec) return -1;
1223 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1224 s += count;
1225 if (*s++ != 's') return -1;
1226 yield += (int)(fraction * 1000.0);
1227 break;
1228
1229 default: return -1;
1230 }
1231
1232 if (return_msec) value *= 1000;
1233 yield += value;
1234 if (*s == terminator) return yield;
1235 }
1236 /* Control never reaches here. */
1237 }
1238
1239
1240
1241 /*************************************************
1242 * Read a fixed point value *
1243 *************************************************/
1244
1245 /* The value is returned *1000
1246
1247 Arguments:
1248 s input pointer
1249 terminator required terminator
1250
1251 Returns: the value, or -1 on error
1252 */
1253
1254 static int
1255 readconf_readfixed(const uschar *s, int terminator)
1256 {
1257 int yield = 0;
1258 int value, count;
1259 if (!isdigit(*s)) return -1;
1260 (void)sscanf(CS s, "%d%n", &value, &count);
1261 s += count;
1262 yield = value * 1000;
1263 if (*s == '.')
1264 {
1265 int m = 100;
1266 while (isdigit((*(++s))))
1267 {
1268 yield += (*s - '0') * m;
1269 m /= 10;
1270 }
1271 }
1272
1273 return (*s == terminator)? yield : (-1);
1274 }
1275
1276
1277
1278 /*************************************************
1279 * Find option in list *
1280 *************************************************/
1281
1282 /* The lists are always in order, so binary chop can be used.
1283
1284 Arguments:
1285 name the option name to search for
1286 ol the first entry in the option list
1287 last one more than the offset of the last entry in the option list
1288
1289 Returns: pointer to an option entry, or NULL if not found
1290 */
1291
1292 static optionlist *
1293 find_option(uschar *name, optionlist *ol, int last)
1294 {
1295 int first = 0;
1296 while (last > first)
1297 {
1298 int middle = (first + last)/2;
1299 int c = Ustrcmp(name, ol[middle].name);
1300
1301 if (c == 0) return ol + middle;
1302 else if (c > 0) first = middle + 1;
1303 else last = middle;
1304 }
1305 return NULL;
1306 }
1307
1308
1309
1310 /*************************************************
1311 * Find a set flag in option list *
1312 *************************************************/
1313
1314 /* Because some versions of Unix make no restrictions on the values of uids and
1315 gids (even negative ones), we cannot represent "unset" by a special value.
1316 There is therefore a separate boolean variable for each one indicating whether
1317 a value is set or not. This function returns a pointer to the boolean, given
1318 the original option name. It is a major disaster if the flag cannot be found.
1319
1320 Arguments:
1321 name the name of the uid or gid option
1322 oltop points to the start of the relevant option list
1323 last one more than the offset of the last item in the option list
1324 data_block NULL when reading main options => data values in the option
1325 list are absolute addresses; otherwise they are byte offsets
1326 in data_block (used for driver options)
1327
1328 Returns: a pointer to the boolean flag.
1329 */
1330
1331 static BOOL *
1332 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1333 {
1334 optionlist *ol;
1335 uschar name2[64];
1336 sprintf(CS name2, "*set_%.50s", name);
1337 ol = find_option(name2, oltop, last);
1338 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1339 "Exim internal error: missing set flag for %s", name);
1340 return (data_block == NULL)? (BOOL *)(ol->value) :
1341 (BOOL *)(US data_block + (long int)(ol->value));
1342 }
1343
1344
1345
1346
1347 /*************************************************
1348 * Output extra characters message and die *
1349 *************************************************/
1350
1351 /* Called when an option line has junk on the end. Sometimes this is because
1352 the sysadmin thinks comments are permitted.
1353
1354 Arguments:
1355 s points to the extra characters
1356 t1..t3 strings to insert in the log message
1357
1358 Returns: doesn't return; dies
1359 */
1360
1361 static void
1362 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1363 {
1364 uschar *comment = US"";
1365 if (*s == '#') comment = US" (# is comment only at line start)";
1366 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1367 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1368 }
1369
1370
1371
1372 /*************************************************
1373 * Read rewrite information *
1374 *************************************************/
1375
1376 /* Each line of rewrite information contains:
1377
1378 . A complete address in the form user@domain, possibly with
1379 leading * for each part; or alternatively, a regex.
1380
1381 . A replacement string (which will be expanded).
1382
1383 . An optional sequence of one-letter flags, indicating which
1384 headers etc. to apply this rule to.
1385
1386 All this is decoded and placed into a control block. The OR of the flags is
1387 maintained in a common word.
1388
1389 Arguments:
1390 p points to the string that makes up the rule
1391 existflags points to the overall flag word
1392 isglobal TRUE if reading global rewrite rules
1393
1394 Returns: the control block for the parsed rule.
1395 */
1396
1397 static rewrite_rule *
1398 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1399 {
1400 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1401
1402 next->next = NULL;
1403 next->key = string_dequote(&p);
1404
1405 while (isspace(*p)) p++;
1406 if (*p == 0)
1407 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1408 "missing rewrite replacement string");
1409
1410 next->flags = 0;
1411 next->replacement = string_dequote(&p);
1412
1413 while (*p != 0) switch (*p++)
1414 {
1415 case ' ': case '\t': break;
1416
1417 case 'q': next->flags |= rewrite_quit; break;
1418 case 'w': next->flags |= rewrite_whole; break;
1419
1420 case 'h': next->flags |= rewrite_all_headers; break;
1421 case 's': next->flags |= rewrite_sender; break;
1422 case 'f': next->flags |= rewrite_from; break;
1423 case 't': next->flags |= rewrite_to; break;
1424 case 'c': next->flags |= rewrite_cc; break;
1425 case 'b': next->flags |= rewrite_bcc; break;
1426 case 'r': next->flags |= rewrite_replyto; break;
1427
1428 case 'E': next->flags |= rewrite_all_envelope; break;
1429 case 'F': next->flags |= rewrite_envfrom; break;
1430 case 'T': next->flags |= rewrite_envto; break;
1431
1432 case 'Q': next->flags |= rewrite_qualify; break;
1433 case 'R': next->flags |= rewrite_repeat; break;
1434
1435 case 'S':
1436 next->flags |= rewrite_smtp;
1437 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1439 "rewrite rule has the S flag but is not a regular expression");
1440 break;
1441
1442 default:
1443 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1444 "unknown rewrite flag character '%c' "
1445 "(could be missing quotes round replacement item)", p[-1]);
1446 break;
1447 }
1448
1449 /* If no action flags are set, set all the "normal" rewrites. */
1450
1451 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1452 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1453
1454 /* Remember which exist, for optimization, and return the rule */
1455
1456 *existflags |= next->flags;
1457 return next;
1458 }
1459
1460
1461
1462
1463 /*************************************************
1464 * Read global rewrite information *
1465 *************************************************/
1466
1467 /* Each line is a single rewrite rule; it is parsed into a control block
1468 by readconf_one_rewrite(), and its flags are ORed into the global flag
1469 word rewrite_existflags. */
1470
1471 void
1472 readconf_rewrites(void)
1473 {
1474 rewrite_rule **chain = &global_rewrite_rules;
1475 uschar *p;
1476
1477 while ((p = get_config_line()) != NULL)
1478 {
1479 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1480 *chain = next;
1481 chain = &(next->next);
1482 }
1483 }
1484
1485
1486
1487 /*************************************************
1488 * Read a string *
1489 *************************************************/
1490
1491 /* Strings are read into the normal store pool. As long we aren't too
1492 near the end of the current block, the string will just use what is necessary
1493 on the top of the stacking pool, because string_cat() uses the extension
1494 mechanism.
1495
1496 Argument:
1497 s the rest of the input line
1498 name the option name (for errors)
1499
1500 Returns: pointer to the string
1501 */
1502
1503 static uschar *
1504 read_string(const uschar *s, const uschar *name)
1505 {
1506 uschar *yield;
1507 const uschar *ss;
1508
1509 if (*s != '\"') return string_copy(s);
1510
1511 ss = s;
1512 yield = string_dequote(&s);
1513
1514 if (s == ss+1 || s[-1] != '\"')
1515 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1516 "missing quote at end of string value for %s", name);
1517
1518 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1519
1520 return yield;
1521 }
1522
1523
1524 /*************************************************
1525 * Custom-handler options *
1526 *************************************************/
1527 static void
1528 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1529 {
1530 if (flags & opt_fn_print)
1531 {
1532 if (flags & opt_fn_print_label) printf("%s = ", name);
1533 printf("%s\n", smtp_receive_timeout_s
1534 ? string_printing2(smtp_receive_timeout_s, FALSE)
1535 : readconf_printtime(smtp_receive_timeout));
1536 }
1537 else if (*str == '$')
1538 smtp_receive_timeout_s = string_copy(str);
1539 else
1540 {
1541 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1542 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1543 if (smtp_receive_timeout < 0)
1544 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1545 name);
1546 }
1547 }
1548
1549 /*************************************************
1550 * Handle option line *
1551 *************************************************/
1552
1553 /* This function is called from several places to process a line containing the
1554 setting of an option. The first argument is the line to be decoded; it has been
1555 checked not to be empty and not to start with '#'. Trailing newlines and white
1556 space have been removed. The second argument is a pointer to the list of
1557 variable names that are to be recognized, together with their types and
1558 locations, and the third argument gives the number of entries in the list.
1559
1560 The fourth argument is a pointer to a data block. If it is NULL, then the data
1561 values in the options list are absolute addresses. Otherwise, they are byte
1562 offsets in the data block.
1563
1564 String option data may continue onto several lines; this function reads further
1565 data from config_file if necessary.
1566
1567 The yield of this function is normally zero. If a string continues onto
1568 multiple lines, then the data value is permitted to be followed by a comma
1569 or a semicolon (for use in drivers) and the yield is that character.
1570
1571 Arguments:
1572 buffer contains the configuration line to be handled
1573 oltop points to the start of the relevant option list
1574 last one more than the offset of the last item in the option list
1575 data_block NULL when reading main options => data values in the option
1576 list are absolute addresses; otherwise they are byte offsets
1577 in data_block when they have opt_public set; otherwise
1578 they are byte offsets in data_block->options_block.
1579 unknown_txt format string to use in panic message for unknown option;
1580 must contain %s for option name
1581 if given as NULL, don't panic on unknown option
1582
1583 Returns: TRUE if an option was read successfully,
1584 FALSE false for an unknown option if unknown_txt == NULL,
1585 otherwise panic and die on an unknown option
1586 */
1587
1588 static BOOL
1589 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1590 void *data_block, uschar *unknown_txt)
1591 {
1592 int ptr = 0;
1593 int offset = 0;
1594 int count, type, value;
1595 int issecure = 0;
1596 uid_t uid;
1597 gid_t gid;
1598 BOOL boolvalue = TRUE;
1599 BOOL freesptr = TRUE;
1600 optionlist *ol, *ol2;
1601 struct passwd *pw;
1602 void *reset_point;
1603 int intbase = 0;
1604 uschar *inttype = US"";
1605 uschar *sptr;
1606 uschar *s = buffer;
1607 uschar **str_target;
1608 uschar name[64];
1609 uschar name2[64];
1610
1611 /* There may be leading spaces; thereafter, we expect an option name starting
1612 with a letter. */
1613
1614 while (isspace(*s)) s++;
1615 if (!isalpha(*s))
1616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1617
1618 /* Read the name of the option, and skip any subsequent white space. If
1619 it turns out that what we read was "hide", set the flag indicating that
1620 this is a secure option, and loop to read the next word. */
1621
1622 for (int n = 0; n < 2; n++)
1623 {
1624 while (isalnum(*s) || *s == '_')
1625 {
1626 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1627 s++;
1628 }
1629 name[ptr] = 0;
1630 while (isspace(*s)) s++;
1631 if (Ustrcmp(name, "hide") != 0) break;
1632 issecure = opt_secure;
1633 ptr = 0;
1634 }
1635
1636 /* Deal with "no_" or "not_" here for booleans */
1637
1638 if (Ustrncmp(name, "no_", 3) == 0)
1639 {
1640 boolvalue = FALSE;
1641 offset = 3;
1642 }
1643
1644 if (Ustrncmp(name, "not_", 4) == 0)
1645 {
1646 boolvalue = FALSE;
1647 offset = 4;
1648 }
1649
1650 /* Search the list for the given name. A non-existent name, or an option that
1651 is set twice, is a disaster. */
1652
1653 if (!(ol = find_option(name + offset, oltop, last)))
1654 {
1655 if (unknown_txt == NULL) return FALSE;
1656 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1657 }
1658
1659 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1661 "\"%s\" option set for the second time", name);
1662
1663 ol->type |= opt_set | issecure;
1664 type = ol->type & opt_mask;
1665
1666 /* Types with data values must be followed by '='; the "no[t]_" prefix
1667 applies only to boolean values. */
1668
1669 if (type < opt_bool || type > opt_bool_last)
1670 {
1671 if (offset != 0)
1672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1673 "negation prefix applied to a non-boolean option");
1674 if (*s == 0)
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1676 "unexpected end of line (data missing) after %s", name);
1677 if (*s != '=')
1678 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1679 }
1680
1681 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1682 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1683 ultimately expands to one of those values. */
1684
1685 else if (*s != 0 && (offset != 0 || *s != '='))
1686 extra_chars_error(s, US"boolean option ", name, US"");
1687
1688 /* Skip white space after = */
1689
1690 if (*s == '=') while (isspace((*(++s))));
1691
1692 /* If there is a data block and the opt_public flag is not set, change
1693 the data block pointer to the private options block. */
1694
1695 if (data_block != NULL && (ol->type & opt_public) == 0)
1696 data_block = (void *)(((driver_instance *)data_block)->options_block);
1697
1698 /* Now get the data according to the type. */
1699
1700 switch (type)
1701 {
1702 /* If a string value is not enclosed in quotes, it consists of
1703 the rest of the current line, verbatim. Otherwise, string escapes
1704 are processed.
1705
1706 A transport is specified as a string, which is then looked up in the
1707 list of transports. A search type is specified as one of a number of
1708 known strings.
1709
1710 A set or rewrite rules for a driver is specified as a string, which is
1711 then parsed into a suitable chain of control blocks.
1712
1713 Uids and gids are specified as strings which are then looked up in the
1714 passwd file. Lists of uids and gids are similarly specified as colon-
1715 separated strings. */
1716
1717 case opt_stringptr:
1718 case opt_uid:
1719 case opt_gid:
1720 case opt_expand_uid:
1721 case opt_expand_gid:
1722 case opt_uidlist:
1723 case opt_gidlist:
1724 case opt_rewrite:
1725
1726 reset_point = sptr = read_string(s, name);
1727
1728 /* Having read a string, we now have several different ways of using it,
1729 depending on the data type, so do another switch. If keeping the actual
1730 string is not required (because it is interpreted), freesptr is set TRUE,
1731 and at the end we reset the pool. */
1732
1733 switch (type)
1734 {
1735 /* If this was a string, set the variable to point to the new string,
1736 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1737 rules, we still keep the string (for printing), and parse the rules into a
1738 control block and flags word. */
1739
1740 case opt_stringptr:
1741 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1742 : USS (ol->value);
1743 if (ol->type & opt_rep_con)
1744 {
1745 uschar * saved_condition;
1746 /* We already have a condition, we're conducting a crude hack to let
1747 multiple condition rules be chained together, despite storing them in
1748 text form. */
1749 *str_target = string_copy_malloc( (saved_condition = *str_target)
1750 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1751 saved_condition, sptr)
1752 : sptr);
1753 /* TODO(pdp): there is a memory leak here and just below
1754 when we set 3 or more conditions; I still don't
1755 understand the store mechanism enough to know
1756 what's the safe way to free content from an earlier store.
1757 AFAICT, stores stack, so freeing an early stored item also stores
1758 all data alloc'd after it. If we knew conditions were adjacent,
1759 we could survive that, but we don't. So I *think* we need to take
1760 another bit from opt_type to indicate "malloced"; this seems like
1761 quite a hack, especially for this one case. It also means that
1762 we can't ever reclaim the store from the *first* condition.
1763
1764 Because we only do this once, near process start-up, I'm prepared to
1765 let this slide for the time being, even though it rankles. */
1766 }
1767 else if (ol->type & opt_rep_str)
1768 {
1769 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1770 int sep_i = -(int)sep_o;
1771 const uschar * list = sptr;
1772 uschar * s;
1773 gstring * list_o = NULL;
1774
1775 if (*str_target)
1776 {
1777 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1778 list_o = string_cat(list_o, *str_target);
1779 }
1780
1781 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1782 list_o = string_append_listele(list_o, sep_o, s);
1783
1784 if (list_o)
1785 *str_target = string_copy_malloc(string_from_gstring(list_o));
1786 }
1787 else
1788 {
1789 *str_target = sptr;
1790 freesptr = FALSE;
1791 }
1792 break;
1793
1794 case opt_rewrite:
1795 if (data_block)
1796 *USS (US data_block + (long int)(ol->value)) = sptr;
1797 else
1798 *USS (ol->value) = sptr;
1799 freesptr = FALSE;
1800 if (type == opt_rewrite)
1801 {
1802 int sep = 0;
1803 int *flagptr;
1804 uschar *p = sptr;
1805 rewrite_rule **chain;
1806 optionlist *ol3;
1807
1808 sprintf(CS name2, "*%.50s_rules", name);
1809 ol2 = find_option(name2, oltop, last);
1810 sprintf(CS name2, "*%.50s_flags", name);
1811 ol3 = find_option(name2, oltop, last);
1812
1813 if (ol2 == NULL || ol3 == NULL)
1814 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1815 "rewrite rules not available for driver");
1816
1817 if (data_block == NULL)
1818 {
1819 chain = (rewrite_rule **)(ol2->value);
1820 flagptr = (int *)(ol3->value);
1821 }
1822 else
1823 {
1824 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1825 flagptr = (int *)(US data_block + (long int)(ol3->value));
1826 }
1827
1828 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1829 {
1830 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1831 *chain = next;
1832 chain = &(next->next);
1833 }
1834
1835 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1836 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1837 "non-header rewrite - not allowed at transport time -");
1838 }
1839 break;
1840
1841 /* If it was an expanded uid, see if there is any expansion to be
1842 done by checking for the presence of a $ character. If there is, save it
1843 in the corresponding *expand_user option field. Otherwise, fall through
1844 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1845 of data. */
1846
1847 case opt_expand_uid:
1848 sprintf(CS name2, "*expand_%.50s", name);
1849 ol2 = find_option(name2, oltop, last);
1850 if (ol2 != NULL)
1851 {
1852 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1853
1854 if (data_block == NULL)
1855 *((uschar **)(ol2->value)) = ss;
1856 else
1857 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1858
1859 if (ss != NULL)
1860 {
1861 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1862 freesptr = FALSE;
1863 break;
1864 }
1865 }
1866
1867 /* Look up a fixed uid, and also make use of the corresponding gid
1868 if a passwd entry is returned and the gid has not been set. */
1869
1870 case opt_uid:
1871 if (!route_finduser(sptr, &pw, &uid))
1872 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1873 if (data_block == NULL)
1874 *((uid_t *)(ol->value)) = uid;
1875 else
1876 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1877
1878 /* Set the flag indicating a fixed value is set */
1879
1880 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1881
1882 /* Handle matching gid if we have a passwd entry: done by finding the
1883 same name with terminating "user" changed to "group"; if not found,
1884 ignore. Also ignore if the value is already set. */
1885
1886 if (pw == NULL) break;
1887 Ustrcpy(name+Ustrlen(name)-4, "group");
1888 ol2 = find_option(name, oltop, last);
1889 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1890 (ol2->type & opt_mask) == opt_expand_gid))
1891 {
1892 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1893 if (! *set_flag)
1894 {
1895 if (data_block == NULL)
1896 *((gid_t *)(ol2->value)) = pw->pw_gid;
1897 else
1898 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1899 *set_flag = TRUE;
1900 }
1901 }
1902 break;
1903
1904 /* If it was an expanded gid, see if there is any expansion to be
1905 done by checking for the presence of a $ character. If there is, save it
1906 in the corresponding *expand_user option field. Otherwise, fall through
1907 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1908 of data. */
1909
1910 case opt_expand_gid:
1911 sprintf(CS name2, "*expand_%.50s", name);
1912 ol2 = find_option(name2, oltop, last);
1913 if (ol2 != NULL)
1914 {
1915 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1916
1917 if (data_block == NULL)
1918 *((uschar **)(ol2->value)) = ss;
1919 else
1920 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1921
1922 if (ss != NULL)
1923 {
1924 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1925 freesptr = FALSE;
1926 break;
1927 }
1928 }
1929
1930 /* Handle freestanding gid */
1931
1932 case opt_gid:
1933 if (!route_findgroup(sptr, &gid))
1934 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1935 if (data_block == NULL)
1936 *((gid_t *)(ol->value)) = gid;
1937 else
1938 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1939 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1940 break;
1941
1942 /* If it was a uid list, look up each individual entry, and build
1943 a vector of uids, with a count in the first element. Put the vector
1944 in malloc store so we can free the string. (We are reading into
1945 permanent store already.) */
1946
1947 case opt_uidlist:
1948 {
1949 int count = 1;
1950 uid_t *list;
1951 int ptr = 0;
1952 const uschar *p;
1953 const uschar *op = expand_string (sptr);
1954
1955 if (op == NULL)
1956 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1957 name, expand_string_message);
1958
1959 p = op;
1960 if (*p != 0) count++;
1961 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1962 list = store_malloc(count*sizeof(uid_t));
1963 list[ptr++] = (uid_t)(count - 1);
1964
1965 if (data_block == NULL)
1966 *((uid_t **)(ol->value)) = list;
1967 else
1968 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1969
1970 p = op;
1971 while (count-- > 1)
1972 {
1973 int sep = 0;
1974 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1975 if (!route_finduser(big_buffer, NULL, &uid))
1976 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1977 big_buffer);
1978 list[ptr++] = uid;
1979 }
1980 }
1981 break;
1982
1983 /* If it was a gid list, look up each individual entry, and build
1984 a vector of gids, with a count in the first element. Put the vector
1985 in malloc store so we can free the string. (We are reading into permanent
1986 store already.) */
1987
1988 case opt_gidlist:
1989 {
1990 int count = 1;
1991 gid_t *list;
1992 int ptr = 0;
1993 const uschar *p;
1994 const uschar *op = expand_string (sptr);
1995
1996 if (op == NULL)
1997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1998 name, expand_string_message);
1999
2000 p = op;
2001 if (*p != 0) count++;
2002 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2003 list = store_malloc(count*sizeof(gid_t));
2004 list[ptr++] = (gid_t)(count - 1);
2005
2006 if (data_block == NULL)
2007 *((gid_t **)(ol->value)) = list;
2008 else
2009 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2010
2011 p = op;
2012 while (count-- > 1)
2013 {
2014 int sep = 0;
2015 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2016 if (!route_findgroup(big_buffer, &gid))
2017 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2018 big_buffer);
2019 list[ptr++] = gid;
2020 }
2021 }
2022 break;
2023 }
2024
2025 /* Release store if the value of the string doesn't need to be kept. */
2026
2027 if (freesptr) store_reset(reset_point);
2028 break;
2029
2030 /* Expanded boolean: if no characters follow, or if there are no dollar
2031 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2032 save the string for later expansion in the alternate place. */
2033
2034 case opt_expand_bool:
2035 if (*s != 0 && Ustrchr(s, '$') != 0)
2036 {
2037 sprintf(CS name2, "*expand_%.50s", name);
2038 ol2 = find_option(name2, oltop, last);
2039 if (ol2 != NULL)
2040 {
2041 reset_point = sptr = read_string(s, name);
2042 if (data_block == NULL)
2043 *((uschar **)(ol2->value)) = sptr;
2044 else
2045 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2046 freesptr = FALSE;
2047 break;
2048 }
2049 }
2050 /* Fall through */
2051
2052 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2053 look for yes/not/true/false. Some booleans are stored in a single bit in
2054 a single int. There's a special fudge for verify settings; without a suffix
2055 they set both xx_sender and xx_recipient. The table points to the sender
2056 value; search subsequently for the recipient. There's another special case:
2057 opt_bool_set also notes when a boolean has been set. */
2058
2059 case opt_bool:
2060 case opt_bit:
2061 case opt_bool_verify:
2062 case opt_bool_set:
2063 if (*s != 0)
2064 {
2065 s = readconf_readname(name2, 64, s);
2066 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2067 boolvalue = TRUE;
2068 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2069 boolvalue = FALSE;
2070 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2071 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2072 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2073 US"for boolean option ", name);
2074 }
2075
2076 /* Handle single-bit type. */
2077
2078 if (type == opt_bit)
2079 {
2080 int bit = 1 << ((ol->type >> 16) & 31);
2081 int *ptr = (data_block == NULL)?
2082 (int *)(ol->value) :
2083 (int *)(US data_block + (long int)ol->value);
2084 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2085 break;
2086 }
2087
2088 /* Handle full BOOL types */
2089
2090 if (data_block == NULL)
2091 *((BOOL *)(ol->value)) = boolvalue;
2092 else
2093 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2094
2095 /* Verify fudge */
2096
2097 if (type == opt_bool_verify)
2098 {
2099 sprintf(CS name2, "%.50s_recipient", name + offset);
2100 ol2 = find_option(name2, oltop, last);
2101 if (ol2 != NULL)
2102 {
2103 if (data_block == NULL)
2104 *((BOOL *)(ol2->value)) = boolvalue;
2105 else
2106 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2107 }
2108 }
2109
2110 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2111
2112 else if (type == opt_bool_set)
2113 {
2114 sprintf(CS name2, "*set_%.50s", name + offset);
2115 ol2 = find_option(name2, oltop, last);
2116 if (ol2 != NULL)
2117 {
2118 if (data_block == NULL)
2119 *((BOOL *)(ol2->value)) = TRUE;
2120 else
2121 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2122 }
2123 }
2124 break;
2125
2126 /* Octal integer */
2127
2128 case opt_octint:
2129 intbase = 8;
2130 inttype = US"octal ";
2131
2132 /* Integer: a simple(ish) case; allow octal and hex formats, and
2133 suffixes K, M, G, and T. The different types affect output, not input. */
2134
2135 case opt_mkint:
2136 case opt_int:
2137 {
2138 uschar *endptr;
2139 long int lvalue;
2140
2141 errno = 0;
2142 lvalue = strtol(CS s, CSS &endptr, intbase);
2143
2144 if (endptr == s)
2145 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2146 inttype, name);
2147
2148 if (errno != ERANGE && *endptr)
2149 {
2150 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2151
2152 if ((mp = Ustrchr(mp, *endptr)))
2153 {
2154 endptr++;
2155 do
2156 {
2157 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2158 {
2159 errno = ERANGE;
2160 break;
2161 }
2162 lvalue *= 1024;
2163 }
2164 while (*(mp += 2));
2165 }
2166 }
2167
2168 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2169 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2170 "absolute value of integer \"%s\" is too large (overflow)", s);
2171
2172 while (isspace(*endptr)) endptr++;
2173 if (*endptr)
2174 extra_chars_error(endptr, inttype, US"integer value for ", name);
2175
2176 value = (int)lvalue;
2177 }
2178
2179 if (data_block)
2180 *(int *)(US data_block + (long int)ol->value) = value;
2181 else
2182 *(int *)ol->value = value;
2183 break;
2184
2185 /* Integer held in K: again, allow formats and suffixes as above. */
2186
2187 case opt_Kint:
2188 {
2189 uschar *endptr;
2190 errno = 0;
2191 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2192
2193 if (endptr == s)
2194 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2195 inttype, name);
2196
2197 if (errno != ERANGE && *endptr)
2198 {
2199 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2200
2201 if ((mp = Ustrchr(mp, *endptr)))
2202 {
2203 endptr++;
2204 while (*(mp += 2))
2205 {
2206 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2207 {
2208 errno = ERANGE;
2209 break;
2210 }
2211 lvalue *= 1024;
2212 }
2213 }
2214 else
2215 lvalue = (lvalue + 512)/1024;
2216 }
2217
2218 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2219 "absolute value of integer \"%s\" is too large (overflow)", s);
2220
2221 while (isspace(*endptr)) endptr++;
2222 if (*endptr != 0)
2223 extra_chars_error(endptr, inttype, US"integer value for ", name);
2224
2225 if (data_block)
2226 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2227 else
2228 *(int_eximarith_t *)ol->value = lvalue;
2229 break;
2230 }
2231
2232 /* Fixed-point number: held to 3 decimal places. */
2233
2234 case opt_fixed:
2235 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2236 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2237 "fixed-point number expected for %s", name);
2238
2239 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2240 "integer \"%s\" is too large (overflow)", s);
2241
2242 value *= 1000;
2243
2244 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2245 "integer \"%s\" is too large (overflow)", s);
2246
2247 /* We get a coverity error here for using count, as it derived
2248 from the tainted buffer pointed to by s, as parsed by sscanf().
2249 By the definition of sscanf we must be accessing between start
2250 and end of s (assuming it is nul-terminated...) so ignore the error. */
2251 /* coverity[tainted_data] */
2252 if (s[count] == '.')
2253 {
2254 int d = 100;
2255 while (isdigit(s[++count]))
2256 {
2257 value += (s[count] - '0') * d;
2258 d /= 10;
2259 }
2260 }
2261
2262 while (isspace(s[count])) count++;
2263
2264 if (s[count] != 0)
2265 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2266
2267 if (data_block == NULL)
2268 *((int *)(ol->value)) = value;
2269 else
2270 *((int *)(US data_block + (long int)(ol->value))) = value;
2271 break;
2272
2273 /* There's a special routine to read time values. */
2274
2275 case opt_time:
2276 value = readconf_readtime(s, 0, FALSE);
2277 if (value < 0)
2278 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2279 name);
2280 if (data_block == NULL)
2281 *((int *)(ol->value)) = value;
2282 else
2283 *((int *)(US data_block + (long int)(ol->value))) = value;
2284 break;
2285
2286 /* A time list is a list of colon-separated times, with the first
2287 element holding the size of the list and the second the number of
2288 entries used. */
2289
2290 case opt_timelist:
2291 {
2292 int count = 0;
2293 int *list = (data_block == NULL)?
2294 (int *)(ol->value) :
2295 (int *)(US data_block + (long int)(ol->value));
2296
2297 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2298 {
2299 int terminator = 0;
2300 uschar *snext = Ustrchr(s, ':');
2301 if (snext != NULL)
2302 {
2303 uschar *ss = snext;
2304 while (ss > s && isspace(ss[-1])) ss--;
2305 terminator = *ss;
2306 }
2307 value = readconf_readtime(s, terminator, FALSE);
2308 if (value < 0)
2309 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2310 name);
2311 if (count > 1 && value <= list[count])
2312 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2313 "time value out of order for %s", name);
2314 list[count+1] = value;
2315 if (snext == NULL) break;
2316 s = snext + 1;
2317 while (isspace(*s)) s++;
2318 }
2319
2320 if (count > list[0] - 2)
2321 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2322 name);
2323 if (count > 0 && list[2] == 0) count = 0;
2324 list[1] = count;
2325 break;
2326 }
2327
2328 case opt_func:
2329 {
2330 void (*fn)() = ol->value;
2331 fn(name, s, 0);
2332 break;
2333 }
2334 }
2335
2336 return TRUE;
2337 }
2338
2339
2340
2341 /*************************************************
2342 * Print a time value *
2343 *************************************************/
2344
2345 /*
2346 Argument: a time value in seconds
2347 Returns: pointer to a fixed buffer containing the time as a string,
2348 in readconf_readtime() format
2349 */
2350
2351 uschar *
2352 readconf_printtime(int t)
2353 {
2354 int s, m, h, d, w;
2355 uschar *p = time_buffer;
2356
2357 if (t < 0)
2358 {
2359 *p++ = '-';
2360 t = -t;
2361 }
2362
2363 s = t % 60;
2364 t /= 60;
2365 m = t % 60;
2366 t /= 60;
2367 h = t % 24;
2368 t /= 24;
2369 d = t % 7;
2370 w = t/7;
2371
2372 if (w > 0) p += sprintf(CS p, "%dw", w);
2373 if (d > 0) p += sprintf(CS p, "%dd", d);
2374 if (h > 0) p += sprintf(CS p, "%dh", h);
2375 if (m > 0) p += sprintf(CS p, "%dm", m);
2376 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2377
2378 return time_buffer;
2379 }
2380
2381
2382
2383 /*************************************************
2384 * Print an individual option value *
2385 *************************************************/
2386
2387 /* This is used by the -bP option, so prints to the standard output.
2388 The entire options list is passed in as an argument, because some options come
2389 in pairs - typically uid/gid settings, which can either be explicit numerical
2390 values, or strings to be expanded later. If the numerical value is unset,
2391 search for "*expand_<name>" to see if there is a string equivalent.
2392
2393 Arguments:
2394 ol option entry, or NULL for an unknown option
2395 name option name
2396 options_block NULL for main configuration options; otherwise points to
2397 a driver block; if the option doesn't have opt_public
2398 set, then options_block->options_block is where the item
2399 resides.
2400 oltop points to the option list in which ol exists
2401 last one more than the offset of the last entry in optop
2402 no_labels do not show "foo = " at the start.
2403
2404 Returns: boolean success
2405 */
2406
2407 static BOOL
2408 print_ol(optionlist *ol, uschar *name, void *options_block,
2409 optionlist *oltop, int last, BOOL no_labels)
2410 {
2411 struct passwd *pw;
2412 struct group *gr;
2413 optionlist *ol2;
2414 void *value;
2415 uid_t *uidlist;
2416 gid_t *gidlist;
2417 uschar *s;
2418 uschar name2[64];
2419
2420 if (!ol)
2421 {
2422 printf("%s is not a known option\n", name);
2423 return FALSE;
2424 }
2425
2426 /* Non-admin callers cannot see options that have been flagged secure by the
2427 "hide" prefix. */
2428
2429 if (!f.admin_user && ol->type & opt_secure)
2430 {
2431 if (no_labels)
2432 printf("%s\n", hidden);
2433 else
2434 printf("%s = %s\n", name, hidden);
2435 return TRUE;
2436 }
2437
2438 /* Else show the value of the option */
2439
2440 value = ol->value;
2441 if (options_block)
2442 {
2443 if (!(ol->type & opt_public))
2444 options_block = (void *)(((driver_instance *)options_block)->options_block);
2445 value = (void *)(US options_block + (long int)value);
2446 }
2447
2448 switch(ol->type & opt_mask)
2449 {
2450 case opt_stringptr:
2451 case opt_rewrite: /* Show the text value */
2452 s = *(USS value);
2453 if (!no_labels) printf("%s = ", name);
2454 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2455 break;
2456
2457 case opt_int:
2458 if (!no_labels) printf("%s = ", name);
2459 printf("%d\n", *((int *)value));
2460 break;
2461
2462 case opt_mkint:
2463 {
2464 int x = *((int *)value);
2465 if (x != 0 && (x & 1023) == 0)
2466 {
2467 int c = 'K';
2468 x >>= 10;
2469 if ((x & 1023) == 0)
2470 {
2471 c = 'M';
2472 x >>= 10;
2473 }
2474 if (!no_labels) printf("%s = ", name);
2475 printf("%d%c\n", x, c);
2476 }
2477 else
2478 {
2479 if (!no_labels) printf("%s = ", name);
2480 printf("%d\n", x);
2481 }
2482 }
2483 break;
2484
2485 case opt_Kint:
2486 {
2487 int_eximarith_t x = *((int_eximarith_t *)value);
2488 if (!no_labels) printf("%s = ", name);
2489 if (x == 0) printf("0\n");
2490 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2491 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2492 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2493 else printf(PR_EXIM_ARITH "K\n", x);
2494 }
2495 break;
2496
2497 case opt_octint:
2498 if (!no_labels) printf("%s = ", name);
2499 printf("%#o\n", *((int *)value));
2500 break;
2501
2502 /* Can be negative only when "unset", in which case integer */
2503
2504 case opt_fixed:
2505 {
2506 int x = *((int *)value);
2507 int f = x % 1000;
2508 int d = 100;
2509 if (x < 0) printf("%s =\n", name); else
2510 {
2511 if (!no_labels) printf("%s = ", name);
2512 printf("%d.", x/1000);
2513 do
2514 {
2515 printf("%d", f/d);
2516 f %= d;
2517 d /= 10;
2518 }
2519 while (f != 0);
2520 printf("\n");
2521 }
2522 }
2523 break;
2524
2525 /* If the numerical value is unset, try for the string value */
2526
2527 case opt_expand_uid:
2528 if (! *get_set_flag(name, oltop, last, options_block))
2529 {
2530 sprintf(CS name2, "*expand_%.50s", name);
2531 if ((ol2 = find_option(name2, oltop, last)))
2532 {
2533 void *value2 = ol2->value;
2534 if (options_block)
2535 value2 = (void *)(US options_block + (long int)value2);
2536 s = *(USS value2);
2537 if (!no_labels) printf("%s = ", name);
2538 printf("%s\n", s ? string_printing(s) : US"");
2539 break;
2540 }
2541 }
2542
2543 /* Else fall through */
2544
2545 case opt_uid:
2546 if (!no_labels) printf("%s = ", name);
2547 if (! *get_set_flag(name, oltop, last, options_block))
2548 printf("\n");
2549 else
2550 if ((pw = getpwuid(*((uid_t *)value))))
2551 printf("%s\n", pw->pw_name);
2552 else
2553 printf("%ld\n", (long int)(*((uid_t *)value)));
2554 break;
2555
2556 /* If the numerical value is unset, try for the string value */
2557
2558 case opt_expand_gid:
2559 if (! *get_set_flag(name, oltop, last, options_block))
2560 {
2561 sprintf(CS name2, "*expand_%.50s", name);
2562 if ( (ol2 = find_option(name2, oltop, last))
2563 && (ol2->type & opt_mask) == opt_stringptr)
2564 {
2565 void *value2 = ol2->value;
2566 if (options_block)
2567 value2 = (void *)(US options_block + (long int)value2);
2568 s = *(USS value2);
2569 if (!no_labels) printf("%s = ", name);
2570 printf("%s\n", s ? string_printing(s) : US"");
2571 break;
2572 }
2573 }
2574
2575 /* Else fall through */
2576
2577 case opt_gid:
2578 if (!no_labels) printf("%s = ", name);
2579 if (! *get_set_flag(name, oltop, last, options_block))
2580 printf("\n");
2581 else
2582 if ((gr = getgrgid(*((int *)value))))
2583 printf("%s\n", gr->gr_name);
2584 else
2585 printf("%ld\n", (long int)(*((int *)value)));
2586 break;
2587
2588 case opt_uidlist:
2589 uidlist = *((uid_t **)value);
2590 if (!no_labels) printf("%s =", name);
2591 if (uidlist)
2592 {
2593 uschar sep = no_labels ? '\0' : ' ';
2594 for (int i = 1; i <= (int)(uidlist[0]); i++)
2595 {
2596 uschar *name = NULL;
2597 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2598 if (sep != '\0') printf("%c", sep);
2599 if (name) printf("%s", name);
2600 else printf("%ld", (long int)(uidlist[i]));
2601 sep = ':';
2602 }
2603 }
2604 printf("\n");
2605 break;
2606
2607 case opt_gidlist:
2608 gidlist = *((gid_t **)value);
2609 if (!no_labels) printf("%s =", name);
2610 if (gidlist)
2611 {
2612 uschar sep = no_labels ? '\0' : ' ';
2613 for (int i = 1; i <= (int)(gidlist[0]); i++)
2614 {
2615 uschar *name = NULL;
2616 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2617 if (sep != '\0') printf("%c", sep);
2618 if (name) printf("%s", name);
2619 else printf("%ld", (long int)(gidlist[i]));
2620 sep = ':';
2621 }
2622 }
2623 printf("\n");
2624 break;
2625
2626 case opt_time:
2627 if (!no_labels) printf("%s = ", name);
2628 printf("%s\n", readconf_printtime(*((int *)value)));
2629 break;
2630
2631 case opt_timelist:
2632 {
2633 int *list = (int *)value;
2634 if (!no_labels) printf("%s = ", name);
2635 for (int i = 0; i < list[1]; i++)
2636 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2637 printf("\n");
2638 }
2639 break;
2640
2641 case opt_bit:
2642 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2643 "" : "no_", name);
2644 break;
2645
2646 case opt_expand_bool:
2647 sprintf(CS name2, "*expand_%.50s", name);
2648 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2649 {
2650 void *value2 = ol2->value;
2651 if (options_block)
2652 value2 = (void *)(US options_block + (long int)value2);
2653 s = *(USS value2);
2654 if (s)
2655 {
2656 if (!no_labels) printf("%s = ", name);
2657 printf("%s\n", string_printing(s));
2658 break;
2659 }
2660 /* s == NULL => string not set; fall through */
2661 }
2662
2663 /* Fall through */
2664
2665 case opt_bool:
2666 case opt_bool_verify:
2667 case opt_bool_set:
2668 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2669 break;
2670
2671 case opt_func:
2672 {
2673 void (*fn)() = ol->value;
2674 fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2675 break;
2676 }
2677 }
2678 return TRUE;
2679 }
2680
2681
2682
2683 /*************************************************
2684 * Print value from main configuration *
2685 *************************************************/
2686
2687 /* This function, called as a result of encountering the -bP option,
2688 causes the value of any main configuration variable to be output if the
2689 second argument is NULL. There are some special values:
2690
2691 all print all main configuration options
2692 config_file print the name of the configuration file
2693 (configure_file will still work, for backward
2694 compatibility)
2695 routers print the routers' configurations
2696 transports print the transports' configuration
2697 authenticators print the authenticators' configuration
2698 macros print the macros' configuration
2699 router_list print a list of router names
2700 transport_list print a list of transport names
2701 authenticator_list print a list of authentication mechanism names
2702 macro_list print a list of macro names
2703 +name print a named list item
2704 local_scan print the local_scan options
2705 config print the configuration as it is parsed
2706 environment print the used execution environment
2707
2708 If the second argument is not NULL, it must be one of "router", "transport",
2709 "authenticator" or "macro" in which case the first argument identifies the
2710 driver whose options are to be printed.
2711
2712 Arguments:
2713 name option name if type == NULL; else driver name
2714 type NULL or driver type name, as described above
2715 no_labels avoid the "foo = " at the start of an item
2716
2717 Returns: Boolean success
2718 */
2719
2720 BOOL
2721 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2722 {
2723 BOOL names_only = FALSE;
2724 optionlist *ol2 = NULL;
2725 driver_instance *d = NULL;
2726 int size = 0;
2727
2728 if (!type)
2729 {
2730 if (*name == '+')
2731 {
2732 tree_node *t;
2733 BOOL found = FALSE;
2734 static uschar *types[] = { US"address", US"domain", US"host",
2735 US"localpart" };
2736 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2737 &hostlist_anchor, &localpartlist_anchor };
2738
2739 for (int i = 0; i < 4; i++)
2740 if ((t = tree_search(*(anchors[i]), name+1)))
2741 {
2742 found = TRUE;
2743 if (no_labels)
2744 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2745 else
2746 printf("%slist %s = %s\n", types[i], name+1,
2747 ((namedlist_block *)(t->data.ptr))->string);
2748 }
2749
2750 if (!found)
2751 printf("no address, domain, host, or local part list called \"%s\" "
2752 "exists\n", name+1);
2753
2754 return found;
2755 }
2756
2757 if ( Ustrcmp(name, "configure_file") == 0
2758 || Ustrcmp(name, "config_file") == 0)
2759 {
2760 printf("%s\n", CS config_main_filename);
2761 return TRUE;
2762 }
2763
2764 if (Ustrcmp(name, "all") == 0)
2765 {
2766 for (optionlist * ol = optionlist_config;
2767 ol < optionlist_config + nelem(optionlist_config); ol++)
2768 if (!(ol->type & opt_hidden))
2769 (void) print_ol(ol, US ol->name, NULL,
2770 optionlist_config, nelem(optionlist_config),
2771 no_labels);
2772 return TRUE;
2773 }
2774
2775 if (Ustrcmp(name, "local_scan") == 0)
2776 {
2777 #ifndef LOCAL_SCAN_HAS_OPTIONS
2778 printf("local_scan() options are not supported\n");
2779 return FALSE;
2780 #else
2781 for (optionlist * ol = local_scan_options;
2782 ol < local_scan_options + local_scan_options_count; ol++)
2783 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2784 local_scan_options_count, no_labels);
2785 return TRUE;
2786 #endif
2787 }
2788
2789 if (Ustrcmp(name, "config") == 0)
2790 {
2791 print_config(f.admin_user, no_labels);
2792 return TRUE;
2793 }
2794
2795 if (Ustrcmp(name, "routers") == 0)
2796 {
2797 type = US"router";
2798 name = NULL;
2799 }
2800 else if (Ustrcmp(name, "transports") == 0)
2801 {
2802 type = US"transport";
2803 name = NULL;
2804 }
2805 else if (Ustrcmp(name, "authenticators") == 0)
2806 {
2807 type = US"authenticator";
2808 name = NULL;
2809 }
2810 else if (Ustrcmp(name, "macros") == 0)
2811 {
2812 type = US"macro";
2813 name = NULL;
2814 }
2815 else if (Ustrcmp(name, "router_list") == 0)
2816 {
2817 type = US"router";
2818 name = NULL;
2819 names_only = TRUE;
2820 }
2821 else if (Ustrcmp(name, "transport_list") == 0)
2822 {
2823 type = US"transport";
2824 name = NULL;
2825 names_only = TRUE;
2826 }
2827 else if (Ustrcmp(name, "authenticator_list") == 0)
2828 {
2829 type = US"authenticator";
2830 name = NULL;
2831 names_only = TRUE;
2832 }
2833 else if (Ustrcmp(name, "macro_list") == 0)
2834 {
2835 type = US"macro";
2836 name = NULL;
2837 names_only = TRUE;
2838 }
2839 else if (Ustrcmp(name, "environment") == 0)
2840 {
2841 if (environ)
2842 {
2843 uschar ** p;
2844 for (p = USS environ; *p; p++) ;
2845 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2846
2847 for (p = USS environ; *p; p++)
2848 {
2849 uschar * q;
2850 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2851 puts(CS *p);
2852 }
2853 }
2854 return TRUE;
2855 }
2856
2857 else
2858 return print_ol(find_option(name,
2859 optionlist_config, nelem(optionlist_config)),
2860 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2861 }
2862
2863 /* Handle the options for a router or transport. Skip options that are flagged
2864 as hidden. Some of these are options with names starting with '*', used for
2865 internal alternative representations of other options (which the printing
2866 function will sort out). Others are synonyms kept for backward compatibility.
2867 */
2868
2869 if (Ustrcmp(type, "router") == 0)
2870 {
2871 d = (driver_instance *)routers;
2872 ol2 = optionlist_routers;
2873 size = optionlist_routers_size;
2874 }
2875 else if (Ustrcmp(type, "transport") == 0)
2876 {
2877 d = (driver_instance *)transports;
2878 ol2 = optionlist_transports;
2879 size = optionlist_transports_size;
2880 }
2881 else if (Ustrcmp(type, "authenticator") == 0)
2882 {
2883 d = (driver_instance *)auths;
2884 ol2 = optionlist_auths;
2885 size = optionlist_auths_size;
2886 }
2887
2888 else if (Ustrcmp(type, "macro") == 0)
2889 {
2890 /* People store passwords in macros and they were previously not available
2891 for printing. So we have an admin_users restriction. */
2892 if (!f.admin_user)
2893 {
2894 fprintf(stderr, "exim: permission denied\n");
2895 return FALSE;
2896 }
2897 for (macro_item * m = macros; m; m = m->next)
2898 if (!name || Ustrcmp(name, m->name) == 0)
2899 {
2900 if (names_only)
2901 printf("%s\n", CS m->name);
2902 else if (no_labels)
2903 printf("%s\n", CS m->replacement);
2904 else
2905 printf("%s=%s\n", CS m->name, CS m->replacement);
2906 if (name)
2907 return TRUE;
2908 }
2909 if (!name) return TRUE;
2910
2911 printf("%s %s not found\n", type, name);
2912 return FALSE;
2913 }
2914
2915 if (names_only)
2916 {
2917 for (; d; d = d->next) printf("%s\n", CS d->name);
2918 return TRUE;
2919 }
2920
2921 /* Either search for a given driver, or print all of them */
2922
2923 for (; d; d = d->next)
2924 {
2925 BOOL rc = FALSE;
2926 if (!name)
2927 printf("\n%s %s:\n", d->name, type);
2928 else if (Ustrcmp(d->name, name) != 0) continue;
2929
2930 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2931 if (!(ol->type & opt_hidden))
2932 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2933
2934 for (optionlist * ol = d->info->options;
2935 ol < d->info->options + *(d->info->options_count); ol++)
2936 if (!(ol->type & opt_hidden))
2937 rc |= print_ol(ol, US ol->name, d, d->info->options,
2938 *d->info->options_count, no_labels);
2939
2940 if (name) return rc;
2941 }
2942 if (!name) return TRUE;
2943
2944 printf("%s %s not found\n", type, name);
2945 return FALSE;
2946 }
2947
2948
2949
2950 /*************************************************
2951 * Read a named list item *
2952 *************************************************/
2953
2954 /* This function reads a name and a list (i.e. string). The name is used to
2955 save the list in a tree, sorted by its name. Each entry also has a number,
2956 which can be used for caching tests, but if the string contains any expansion
2957 items other than $key, the number is set negative to inhibit caching. This
2958 mechanism is used for domain, host, and address lists that are referenced by
2959 the "+name" syntax.
2960
2961 Arguments:
2962 anchorp points to the tree anchor
2963 numberp points to the current number for this tree
2964 max the maximum number permitted
2965 s the text of the option line, starting immediately after the name
2966 of the list type
2967 tname the name of the list type, for messages
2968
2969 Returns: nothing
2970 */
2971
2972 static void
2973 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2974 uschar *tname)
2975 {
2976 BOOL forcecache = FALSE;
2977 uschar *ss;
2978 tree_node *t;
2979 namedlist_block *nb = store_get(sizeof(namedlist_block));
2980
2981 if (Ustrncmp(s, "_cache", 6) == 0)
2982 {
2983 forcecache = TRUE;
2984 s += 6;
2985 }
2986
2987 if (!isspace(*s))
2988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2989
2990 if (*numberp >= max)
2991 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2992 tname, max);
2993
2994 while (isspace(*s)) s++;
2995 ss = s;
2996 while (isalnum(*s) || *s == '_') s++;
2997 t = store_get(sizeof(tree_node) + s-ss);
2998 Ustrncpy(t->name, ss, s-ss);
2999 t->name[s-ss] = 0;
3000 while (isspace(*s)) s++;
3001
3002 if (!tree_insertnode(anchorp, t))
3003 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3004 "duplicate name \"%s\" for a named %s", t->name, tname);
3005
3006 t->data.ptr = nb;
3007 nb->number = *numberp;
3008 *numberp += 1;
3009
3010 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3011 "missing '=' after \"%s\"", t->name);
3012 while (isspace(*s)) s++;
3013 nb->string = read_string(s, t->name);
3014 nb->cache_data = NULL;
3015
3016 /* Check the string for any expansions; if any are found, mark this list
3017 uncacheable unless the user has explicited forced caching. */
3018
3019 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3020 }
3021
3022
3023
3024
3025 /*************************************************
3026 * Unpick data for a rate limit *
3027 *************************************************/
3028
3029 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3030 separate values.
3031
3032 Arguments:
3033 s string, in the form t,b,f,l
3034 where t is the threshold (integer)
3035 b is the initial delay (time)
3036 f is the multiplicative factor (fixed point)
3037 k is the maximum time (time)
3038 threshold where to store threshold
3039 base where to store base in milliseconds
3040 factor where to store factor in milliseconds
3041 limit where to store limit
3042
3043 Returns: nothing (panics on error)
3044 */
3045
3046 static void
3047 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3048 int *limit)
3049 {
3050 uschar bstring[16], lstring[16];
3051
3052 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3053 factor, lstring) == 4)
3054 {
3055 *base = readconf_readtime(bstring, 0, TRUE);
3056 *limit = readconf_readtime(lstring, 0, TRUE);
3057 if (*base >= 0 && *limit >= 0) return;
3058 }
3059 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3060 }
3061
3062
3063
3064
3065 /*************************************************
3066 * Drop privs for checking TLS config *
3067 *************************************************/
3068
3069 /* We want to validate TLS options during readconf, but do not want to be
3070 root when we call into the TLS library, in case of library linkage errors
3071 which cause segfaults; before this check, those were always done as the Exim
3072 runtime user and it makes sense to continue with that.
3073
3074 Assumes: tls_require_ciphers has been set, if it will be
3075 exim_user has been set, if it will be
3076 exim_group has been set, if it will be
3077
3078 Returns: bool for "okay"; false will cause caller to immediately exit.
3079 */
3080
3081 #ifdef SUPPORT_TLS
3082 static BOOL
3083 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3084 {
3085 const uschar *errmsg;
3086 pid_t pid;
3087 int rc, status;
3088 void (*oldsignal)(int);
3089
3090 /* If TLS will never be used, no point checking ciphers */
3091
3092 if ( !tls_advertise_hosts
3093 || !*tls_advertise_hosts
3094 || Ustrcmp(tls_advertise_hosts, ":") == 0
3095 )
3096 return TRUE;
3097 else if (!nowarn && !tls_certificate)
3098 log_write(0, LOG_MAIN,
3099 "Warning: No server certificate defined; will use a selfsigned one.\n"
3100 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3101
3102 oldsignal = signal(SIGCHLD, SIG_DFL);
3103
3104 fflush(NULL);
3105 if ((pid = fork()) < 0)
3106 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3107
3108 if (pid == 0)
3109 {
3110 /* in some modes, will have dropped privilege already */
3111 if (!geteuid())
3112 exim_setugid(exim_uid, exim_gid, FALSE,
3113 US"calling tls_validate_require_cipher");
3114
3115 if ((errmsg = tls_validate_require_cipher()))
3116 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3117 "tls_require_ciphers invalid: %s", errmsg);
3118 fflush(NULL);
3119 _exit(0);
3120 }
3121
3122 do {
3123 rc = waitpid(pid, &status, 0);
3124 } while (rc < 0 && errno == EINTR);
3125
3126 DEBUG(D_tls)
3127 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3128 (int)pid, status);
3129
3130 signal(SIGCHLD, oldsignal);
3131
3132 return status == 0;
3133 }
3134 #endif /* SUPPORT_TLS */
3135
3136
3137
3138
3139 /*************************************************
3140 * Read main configuration options *
3141 *************************************************/
3142
3143 /* This function is the first to be called for configuration reading. It
3144 opens the configuration file and reads general configuration settings until
3145 it reaches the end of the configuration section. The file is then left open so
3146 that the remaining configuration data can subsequently be read if needed for
3147 this run of Exim.
3148
3149 The configuration file must be owned either by root or exim, and be writeable
3150 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3151 in the config file, so the test is done on the compiled in values. A slight
3152 anomaly, to be carefully documented.
3153
3154 The name of the configuration file is taken from a list that is included in the
3155 binary of Exim. It can be altered from the command line, but if that is done,
3156 root privilege is immediately withdrawn unless the caller is root or exim.
3157 The first file on the list that exists is used.
3158
3159 For use on multiple systems that share file systems, first look for a
3160 configuration file whose name has the current node name on the end. If that is
3161 not found, try the generic name. For really contorted configurations, that run
3162 multiple Exims with different uid settings, first try adding the effective uid
3163 before the node name. These complications are going to waste resources on most
3164 systems. Therefore they are available only when requested by compile-time
3165 options. */
3166
3167 void
3168 readconf_main(BOOL nowarn)
3169 {
3170 int sep = 0;
3171 struct stat statbuf;
3172 uschar *s, *filename;
3173 const uschar *list = config_main_filelist;
3174
3175 /* Loop through the possible file names */
3176
3177 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3178 {
3179
3180 /* Cut out all the fancy processing unless specifically wanted */
3181
3182 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3183 uschar *suffix = filename + Ustrlen(filename);
3184
3185 /* Try for the node-specific file if a node name exists */
3186
3187 #ifdef CONFIGURE_FILE_USE_NODE
3188 struct utsname uts;
3189 if (uname(&uts) >= 0)
3190 {
3191 #ifdef CONFIGURE_FILE_USE_EUID
3192 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3193 config_file = Ufopen(filename, "rb");
3194 if (config_file == NULL)
3195 #endif /* CONFIGURE_FILE_USE_EUID */
3196 {
3197 sprintf(CS suffix, ".%.256s", uts.nodename);
3198 config_file = Ufopen(filename, "rb");
3199 }
3200 }
3201 #endif /* CONFIGURE_FILE_USE_NODE */
3202
3203 /* Otherwise, try the generic name, possibly with the euid added */
3204
3205 #ifdef CONFIGURE_FILE_USE_EUID
3206 if (config_file == NULL)
3207 {
3208 sprintf(CS suffix, ".%ld", (long int)original_euid);
3209 config_file = Ufopen(filename, "rb");
3210 }
3211 #endif /* CONFIGURE_FILE_USE_EUID */
3212
3213 /* Finally, try the unadorned name */
3214
3215 if (config_file == NULL)
3216 {
3217 *suffix = 0;
3218 config_file = Ufopen(filename, "rb");
3219 }
3220 #else /* if neither defined */
3221
3222 /* This is the common case when the fancy processing is not included. */
3223
3224 config_file = Ufopen(filename, "rb");
3225 #endif
3226
3227 /* If the file does not exist, continue to try any others. For any other
3228 error, break out (and die). */
3229
3230 if (config_file != NULL || errno != ENOENT) break;
3231 }
3232
3233 /* On success, save the name for verification; config_filename is used when
3234 logging configuration errors (it changes for .included files) whereas
3235 config_main_filename is the name shown by -bP. Failure to open a configuration
3236 file is a serious disaster. */
3237
3238 if (config_file)
3239 {
3240 uschar *last_slash = Ustrrchr(filename, '/');
3241 config_filename = config_main_filename = string_copy(filename);
3242
3243 /* The config_main_directory we need for the $config_dir expansion.
3244 config_main_filename we need for $config_file expansion.
3245 And config_dir is the directory of the current configuration, used for
3246 relative .includes. We do need to know it's name, as we change our working
3247 directory later. */
3248
3249 if (filename[0] == '/')
3250 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3251 else
3252 {
3253 /* relative configuration file name: working dir + / + basename(filename) */
3254
3255 uschar buf[PATH_MAX];
3256 gstring * g;
3257
3258 if (os_getcwd(buf, PATH_MAX) == NULL)
3259 {
3260 perror("exim: getcwd");
3261 exit(EXIT_FAILURE);
3262 }
3263 g = string_cat(NULL, buf);
3264
3265 /* If the dir does not end with a "/", append one */
3266 if (g->s[g->ptr-1] != '/')
3267 g = string_catn(g, US"/", 1);
3268
3269 /* If the config file contains a "/", extract the directory part */
3270 if (last_slash)
3271 g = string_catn(g, filename, last_slash - filename);
3272
3273 config_main_directory = string_from_gstring(g);
3274 }
3275 config_directory = config_main_directory;
3276 }
3277 else
3278 {
3279 if (filename == NULL)
3280 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3281 "%s", config_main_filelist);
3282 else
3283 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3284 "configuration file %s", filename));
3285 }
3286
3287 /* Now, once we found and opened our configuration file, we change the directory
3288 to a safe place. Later we change to $spool_directory. */
3289
3290 if (Uchdir("/") < 0)
3291 {
3292 perror("exim: chdir `/': ");
3293 exit(EXIT_FAILURE);
3294 }
3295
3296 /* Check the status of the file we have opened, if we have retained root
3297 privileges and the file isn't /dev/null (which *should* be 0666). */
3298
3299 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3300 {
3301 if (fstat(fileno(config_file), &statbuf) != 0)
3302 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3303 big_buffer);
3304
3305 if ((statbuf.st_uid != root_uid /* owner not root */
3306 #ifdef CONFIGURE_OWNER
3307 && statbuf.st_uid != config_uid /* owner not the special one */
3308 #endif
3309 ) || /* or */
3310 (statbuf.st_gid != root_gid /* group not root & */
3311 #ifdef CONFIGURE_GROUP
3312 && statbuf.st_gid != config_gid /* group not the special one */
3313 #endif
3314 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3315 /* or */
3316 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3317
3318 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3319 "wrong owner, group, or mode", big_buffer);
3320 }
3321
3322 /* Process the main configuration settings. They all begin with a lower case
3323 letter. If we see something starting with an upper case letter, it is taken as
3324 a macro definition. */
3325
3326 while ((s = get_config_line()))
3327 {
3328 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3329 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3330 "found unexpected BOM (Byte Order Mark)");
3331
3332 if (isupper(s[0]))
3333 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3334
3335 else if (Ustrncmp(s, "domainlist", 10) == 0)
3336 read_named_list(&domainlist_anchor, &domainlist_count,
3337 MAX_NAMED_LIST, s+10, US"domain list");
3338
3339 else if (Ustrncmp(s, "hostlist", 8) == 0)
3340 read_named_list(&hostlist_anchor, &hostlist_count,
3341 MAX_NAMED_LIST, s+8, US"host list");
3342
3343 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3344 read_named_list(&addresslist_anchor, &addresslist_count,
3345 MAX_NAMED_LIST, s+11, US"address list");
3346
3347 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3348 read_named_list(&localpartlist_anchor, &localpartlist_count,
3349 MAX_NAMED_LIST, s+13, US"local part list");
3350
3351 else
3352 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3353 NULL, US"main option \"%s\" unknown");
3354 }
3355
3356
3357 /* If local_sender_retain is set, local_from_check must be unset. */
3358
3359 if (local_sender_retain && local_from_check)
3360 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3361 "local_sender_retain are set; this combination is not allowed");
3362
3363 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3364 wanted. */
3365
3366 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3367
3368 /* The max retry interval must not be greater than 24 hours. */
3369
3370 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3371
3372 /* remote_max_parallel must be > 0 */
3373
3374 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3375
3376 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3377 start of a new SMTP message. */
3378
3379 freeze_tell_config = freeze_tell;
3380
3381 /* The primary host name may be required for expansion of spool_directory
3382 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3383 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3384 canonize it. Some people like upper case letters in their host names, so we
3385 don't force the case. */
3386
3387 if (primary_hostname == NULL)
3388 {
3389 const uschar *hostname;
3390 struct utsname uts;
3391 if (uname(&uts) < 0)
3392 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3393 hostname = US uts.nodename;
3394
3395 if (Ustrchr(hostname, '.') == NULL)
3396 {
3397 int af = AF_INET;
3398 struct hostent *hostdata;
3399
3400 #if HAVE_IPV6
3401 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3402 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3403 MCL_DOMAIN, TRUE, NULL) != OK))
3404 af = AF_INET6;
3405 #else
3406 af = AF_INET;
3407 #endif
3408
3409 for (;;)
3410 {
3411 #if HAVE_IPV6
3412 #if HAVE_GETIPNODEBYNAME
3413 int error_num;
3414 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3415 #else
3416 hostdata = gethostbyname2(CS hostname, af);
3417 #endif
3418 #else
3419 hostdata = gethostbyname(CS hostname);
3420 #endif
3421
3422 if (hostdata != NULL)
3423 {
3424 hostname = US hostdata->h_name;
3425 break;
3426 }
3427
3428 if (af == AF_INET) break;
3429 af = AF_INET;
3430 }
3431 }
3432
3433 primary_hostname = string_copy(hostname);
3434 }
3435
3436 /* Set up default value for smtp_active_hostname */
3437
3438 smtp_active_hostname = primary_hostname;
3439
3440 /* If spool_directory wasn't set in the build-time configuration, it must have
3441 got set above. Of course, writing to the log may not work if log_file_path is
3442 not set, but it will at least get to syslog or somewhere, with any luck. */
3443
3444 if (*spool_directory == 0)
3445 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3446 "proceed");
3447
3448 /* Expand the spool directory name; it may, for example, contain the primary
3449 host name. Same comment about failure. */
3450
3451 s = expand_string(spool_directory);
3452 if (s == NULL)
3453 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3454 "\"%s\": %s", spool_directory, expand_string_message);
3455 spool_directory = s;
3456
3457 /* Expand log_file_path, which must contain "%s" in any component that isn't
3458 the null string or "syslog". It is also allowed to contain one instance of %D
3459 or %M. However, it must NOT contain % followed by anything else. */
3460
3461 if (*log_file_path != 0)
3462 {
3463 const uschar *ss, *sss;
3464 int sep = ':'; /* Fixed for log file path */
3465 s = expand_string(log_file_path);
3466 if (s == NULL)
3467 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3468 "\"%s\": %s", log_file_path, expand_string_message);
3469
3470 ss = s;
3471 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3472 {
3473 uschar *t;
3474 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3475 t = Ustrstr(sss, "%s");
3476 if (t == NULL)
3477 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3478 "contain \"%%s\"", sss);
3479 *t = 'X';
3480 t = Ustrchr(sss, '%');
3481 if (t != NULL)
3482 {
3483 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3484 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3485 "unexpected \"%%\" character", s);
3486 }
3487 }
3488
3489 log_file_path = s;
3490 }
3491
3492 /* Interpret syslog_facility into an integer argument for 'ident' param to
3493 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3494 leading "log_". */
3495
3496 if (syslog_facility_str)
3497 {
3498 int i;
3499 uschar *s = syslog_facility_str;
3500
3501 if ((Ustrlen(syslog_facility_str) >= 4) &&
3502 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3503 s += 4;
3504
3505 for (i = 0; i < syslog_list_size; i++)
3506 if (strcmpic(s, syslog_list[i].name) == 0)
3507 {
3508 syslog_facility = syslog_list[i].value;
3509 break;
3510 }
3511
3512 if (i >= syslog_list_size)
3513 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3514 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3515 }
3516
3517 /* Expand pid_file_path */
3518
3519 if (*pid_file_path != 0)
3520 {
3521 if (!(s = expand_string(pid_file_path)))
3522 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3523 "\"%s\": %s", pid_file_path, expand_string_message);
3524 pid_file_path = s;
3525 }
3526
3527 /* Set default value of process_log_path */
3528
3529 if (!process_log_path || *process_log_path =='\0')
3530 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3531
3532 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3533 message. */
3534
3535 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3536
3537 /* Unpick the SMTP rate limiting options, if set */
3538
3539 if (smtp_ratelimit_mail)
3540 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3541 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3542
3543 if (smtp_ratelimit_rcpt)
3544 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3545 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3546
3547 /* The qualify domains default to the primary host name */
3548
3549 if (!qualify_domain_sender)
3550 qualify_domain_sender = primary_hostname;
3551 if (!qualify_domain_recipient)
3552 qualify_domain_recipient = qualify_domain_sender;
3553
3554 /* Setting system_filter_user in the configuration sets the gid as well if a
3555 name is given, but a numerical value does not. */
3556
3557 if (system_filter_uid_set && !system_filter_gid_set)
3558 {
3559 struct passwd *pw = getpwuid(system_filter_uid);
3560 if (!pw)
3561 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3562 (long int)system_filter_uid);
3563 system_filter_gid = pw->pw_gid;
3564 system_filter_gid_set = TRUE;
3565 }
3566
3567 /* If the errors_reply_to field is set, check that it is syntactically valid
3568 and ensure it contains a domain. */
3569
3570 if (errors_reply_to)
3571 {
3572 uschar *errmess;
3573 int start, end, domain;
3574 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3575 &start, &end, &domain, FALSE);
3576
3577 if (!recipient)
3578 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3579 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3580
3581 if (domain == 0)
3582 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3583 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3584 }
3585
3586 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3587 smtp_accept_max must also be set. */
3588
3589 if (smtp_accept_max == 0 &&
3590 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3591 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3592 "smtp_accept_max must be set if smtp_accept_queue or "
3593 "smtp_accept_max_per_host is set");
3594
3595 /* Set up the host number if anything is specified. It is an expanded string
3596 so that it can be computed from the host name, for example. We do this last
3597 so as to ensure that everything else is set up before the expansion. */
3598
3599 if (host_number_string)
3600 {
3601 long int n;
3602 uschar *end;
3603 uschar *s = expand_string(host_number_string);
3604
3605 if (!s)
3606 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3607 "failed to expand localhost_number \"%s\": %s",
3608 host_number_string, expand_string_message);
3609 n = Ustrtol(s, &end, 0);
3610 while (isspace(*end)) end++;
3611 if (*end != 0)
3612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3613 "localhost_number value is not a number: %s", s);
3614 if (n > LOCALHOST_MAX)
3615 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3616 "localhost_number is greater than the maximum allowed value (%d)",
3617 LOCALHOST_MAX);
3618 host_number = n;
3619 }
3620
3621 #ifdef SUPPORT_TLS
3622 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3623
3624 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3625 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3626 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3627 tls_verify_hosts ? "" : "try_");
3628
3629 /* This also checks that the library linkage is working and we can call
3630 routines in it, so call even if tls_require_ciphers is unset */
3631 if (!tls_dropprivs_validate_require_cipher(nowarn))
3632 exit(1);
3633
3634 /* Magic number: at time of writing, 1024 has been the long-standing value
3635 used by so many clients, and what Exim used to use always, that it makes
3636 sense to just min-clamp this max-clamp at that. */
3637 if (tls_dh_max_bits < 1024)
3638 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3639 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3640
3641 /* If openssl_options is set, validate it */
3642 if (openssl_options)
3643 {
3644 # ifdef USE_GNUTLS
3645 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3646 "openssl_options is set but we're using GnuTLS");
3647 # else
3648 long dummy;
3649 if (!tls_openssl_options_parse(openssl_options, &dummy))
3650 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3651 "openssl_options parse error: %s", openssl_options);
3652 # endif
3653 }
3654 #endif /*SUPPORT_TLS*/
3655
3656 if (!nowarn && !keep_environment && environ && *environ)
3657 log_write(0, LOG_MAIN,
3658 "Warning: purging the environment.\n"
3659 " Suggested action: use keep_environment.");
3660 }
3661
3662
3663
3664 /*************************************************
3665 * Initialize one driver *
3666 *************************************************/
3667
3668 /* This is called once the driver's generic options, if any, have been read.
3669 We can now find the driver, set up defaults for the private options, and
3670 unset any "set" bits in the private options table (which might have been
3671 set by another incarnation of the same driver).
3672
3673 Arguments:
3674 d pointer to driver instance block, with generic
3675 options filled in
3676 drivers_available vector of available drivers
3677 size_of_info size of each block in drivers_available
3678 class class of driver, for error message
3679
3680 Returns: pointer to the driver info block
3681 */
3682
3683 static driver_info *
3684 init_driver(driver_instance *d, driver_info *drivers_available,
3685 int size_of_info, uschar *class)
3686 {
3687 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3688 dd = (driver_info *)((US dd) + size_of_info))
3689 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3690 {
3691 int len = dd->options_len;
3692 d->info = dd;
3693 d->options_block = store_get(len);
3694 memcpy(d->options_block, dd->options_block, len);
3695 for (int i = 0; i < *(dd->options_count); i++)
3696 dd->options[i].type &= ~opt_set;
3697 return dd;
3698 }
3699
3700 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3701 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3702
3703 return NULL; /* never obeyed */
3704 }
3705
3706
3707
3708
3709 /*************************************************
3710 * Initialize driver list *
3711 *************************************************/
3712
3713 /* This function is called for routers, transports, and authentication
3714 mechanisms. It reads the data from the current point in the configuration file
3715 up to the end of the section, and sets up a chain of instance blocks according
3716 to the file's contents. The file will already have been opened by a call to
3717 readconf_main, and must be left open for subsequent reading of further data.
3718
3719 Any errors cause a panic crash. Note that the blocks with names driver_info and
3720 driver_instance must map the first portions of all the _info and _instance
3721 blocks for this shared code to work.
3722
3723 Arguments:
3724 class "router", "transport", or "authenticator"
3725 anchor &routers, &transports, &auths
3726 drivers_available available drivers
3727 size_of_info size of each info block
3728 instance_default points to default data for an instance
3729 instance_size size of instance block
3730 driver_optionlist generic option list
3731 driver_optionlist_count count of generic option list
3732
3733 Returns: nothing
3734 */
3735
3736 void
3737 readconf_driver_init(
3738 uschar *class,
3739 driver_instance **anchor,
3740 driver_info *drivers_available,
3741 int size_of_info,
3742 void *instance_default,
3743 int instance_size,
3744 optionlist *driver_optionlist,
3745 int driver_optionlist_count)
3746 {
3747 driver_instance **p = anchor;
3748 driver_instance *d = NULL;
3749 uschar *buffer;
3750
3751 while ((buffer = get_config_line()) != NULL)
3752 {
3753 uschar name[64];
3754 uschar *s;
3755
3756 /* Read the first name on the line and test for the start of a new driver. A
3757 macro definition indicates the end of the previous driver. If this isn't the
3758 start of a new driver, the line will be re-read. */
3759
3760 s = readconf_readname(name, sizeof(name), buffer);
3761
3762 /* Handle macro definition, first finishing off the initialization of the
3763 previous driver, if any. */
3764
3765 if (isupper(*name) && *s == '=')
3766 {
3767 if (d)
3768 {
3769 if (!d->driver_name)
3770 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3771 "no driver defined for %s \"%s\"", class, d->name);
3772 (d->info->init)(d);
3773 d = NULL;
3774 }
3775 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3776 continue;
3777 }
3778
3779 /* If the line starts with a name terminated by a colon, we are at the
3780 start of the definition of a new driver. The rest of the line must be
3781 blank. */
3782
3783 if (*s++ == ':')
3784 {
3785 /* Finish off initializing the previous driver. */
3786
3787 if (d)
3788 {
3789 if (!d->driver_name)
3790 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3791 "no driver defined for %s \"%s\"", class, d->name);
3792 (d->info->init)(d);
3793 }
3794
3795 /* Check that we haven't already got a driver of this name */
3796
3797 for (d = *anchor; d; d = d->next)
3798 if (Ustrcmp(name, d->name) == 0)
3799 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3800 "there are two %ss called \"%s\"", class, name);
3801
3802 /* Set up a new driver instance data block on the chain, with
3803 its default values installed. */
3804
3805 d = store_get(instance_size);
3806 memcpy(d, instance_default, instance_size);
3807 *p = d;
3808 p = &d->next;
3809 d->name = string_copy(name);
3810
3811 /* Clear out the "set" bits in the generic options */
3812
3813 for (int i = 0; i < driver_optionlist_count; i++)
3814 driver_optionlist[i].type &= ~opt_set;
3815
3816 /* Check nothing more on this line, then do the next loop iteration. */
3817
3818 while (isspace(*s)) s++;
3819 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3820 continue;
3821 }
3822
3823 /* Not the start of a new driver. Give an error if we have not set up a
3824 current driver yet. */
3825
3826 if (!d)
3827 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3828
3829 /* First look to see if this is a generic option; if it is "driver",
3830 initialize the driver. If is it not a generic option, we can look for a
3831 private option provided that the driver has been previously set up. */
3832
3833 if (readconf_handle_option(buffer, driver_optionlist,
3834 driver_optionlist_count, d, NULL))
3835 {
3836 if (!d->info && d->driver_name)
3837 init_driver(d, drivers_available, size_of_info, class);
3838 }
3839
3840 /* Handle private options - pass the generic block because some may
3841 live therein. A flag with each option indicates if it is in the public
3842 block. */
3843
3844 else if (d->info)
3845 readconf_handle_option(buffer, d->info->options,
3846 *(d->info->options_count), d, US"option \"%s\" unknown");
3847
3848 /* The option is not generic and the driver name has not yet been given. */
3849
3850 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3851 "(\"driver\" must be specified before any private options)", name);
3852 }
3853
3854 /* Run the initialization function for the final driver. */
3855
3856 if (d)
3857 {
3858 if (!d->driver_name)
3859 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3860 "no driver defined for %s \"%s\"", class, d->name);
3861 (d->info->init)(d);
3862 }
3863 }
3864
3865
3866
3867 /*************************************************
3868 * Check driver dependency *
3869 *************************************************/
3870
3871 /* This function is passed a driver instance and a string. It checks whether
3872 any of the string options for the driver contains the given string as an
3873 expansion variable.
3874
3875 Arguments:
3876 d points to a driver instance block
3877 s the string to search for
3878
3879 Returns: TRUE if a dependency is found
3880 */
3881
3882 BOOL
3883 readconf_depends(driver_instance *d, uschar *s)
3884 {
3885 int count = *(d->info->options_count);
3886 uschar *ss;
3887
3888 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3889 {
3890 void *options_block;
3891 uschar *value;
3892 int type = ol->type & opt_mask;
3893 if (type != opt_stringptr) continue;
3894 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3895 value = *(uschar **)(US options_block + (long int)(ol->value));
3896 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3897 {
3898 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3899 isalnum(ss[Ustrlen(s)])) continue;
3900 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3901 d->name, ol->name, s);
3902 return TRUE;
3903 }
3904 }
3905
3906 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3907 return FALSE;
3908 }
3909
3910
3911
3912
3913 /*************************************************
3914 * Decode an error type for retries *
3915 *************************************************/
3916
3917 /* This function is global because it is also called from the main
3918 program when testing retry information. It decodes strings such as "quota_7d"
3919 into numerical error codes.
3920
3921 Arguments:
3922 pp points to start of text
3923 p points past end of text
3924 basic_errno points to an int to receive the main error number
3925 more_errno points to an int to receive the secondary error data
3926
3927 Returns: NULL if decoded correctly; else points to error text
3928 */
3929
3930 uschar *
3931 readconf_retry_error(const uschar *pp, const uschar *p,
3932 int *basic_errno, int *more_errno)
3933 {
3934 int len;
3935 const uschar *q = pp;
3936 while (q < p && *q != '_') q++;
3937 len = q - pp;
3938
3939 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3940 {
3941 *basic_errno = ERRNO_EXIMQUOTA;
3942 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3943 return US"bad time value";
3944 }
3945
3946 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3947 {
3948 *basic_errno = ECONNREFUSED;
3949 if (q != p)
3950 {
3951 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3952 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3953 else return US"A or MX expected after \"refused\"";
3954 }
3955 }
3956
3957 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3958 {
3959 *basic_errno = ETIMEDOUT;
3960 if (q != p)
3961 {
3962 int i;
3963 int xlen = p - q - 1;
3964 const uschar *x = q + 1;
3965
3966 static uschar *extras[] =
3967 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3968 static int values[] =
3969 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3970
3971 for (i = 0; i < nelem(extras); i++)
3972 if (strncmpic(x, extras[i], xlen) == 0)
3973 {
3974 *more_errno = values[i];
3975 break;
3976 }
3977
3978 if (i >= nelem(extras))
3979 if (strncmpic(x, US"DNS", xlen) == 0)
3980 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3981 "available in retry rules (it has never worked) - treated as "
3982 "\"timeout\"");
3983 else
3984 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3985 }
3986 }
3987
3988 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3989 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3990 strncmpic(pp, US"data_4", 6) == 0)
3991 {
3992 BOOL bad = FALSE;
3993 int x = 255; /* means "any 4xx code" */
3994 if (p != pp + 8) bad = TRUE; else
3995 {
3996 int a = pp[6], b = pp[7];
3997 if (isdigit(a))
3998 {
3999 x = (a - '0') * 10;
4000 if (isdigit(b)) x += b - '0';
4001 else if (b == 'x') x += 100;
4002 else bad = TRUE;
4003 }
4004 else if (a != 'x' || b != 'x') bad = TRUE;
4005 }
4006
4007 if (bad)
4008 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4009 "x is literal and d is any digit", pp);
4010
4011 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4012 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4013 *more_errno = x << 8;
4014 }
4015
4016 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4017 strncmpic(q+1, US"failed", p-q-1) == 0)
4018 *basic_errno = ERRNO_AUTHFAIL;
4019
4020 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4021 *basic_errno = ERRNO_SMTPCLOSED;
4022
4023 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4024 *basic_errno = ERRNO_TLSREQUIRED;
4025
4026 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4027 *basic_errno = ERRNO_UNKNOWNHOST;
4028
4029 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4030 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4031
4032 return NULL;
4033 }
4034
4035
4036
4037
4038 /*************************************************
4039 * Read retry information *
4040 *************************************************/
4041
4042 /* Each line of retry information contains:
4043
4044 . A domain name pattern or an address pattern;
4045
4046 . An error name, possibly with additional data, or *;
4047
4048 . An optional sequence of retry items, each consisting of an identifying
4049 letter, a cutoff time, and optional parameters.
4050
4051 All this is decoded and placed into a control block. */
4052
4053
4054 /* Subroutine to read an argument, preceded by a comma and terminated
4055 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4056 1 = fixed point number (returned *1000).
4057
4058 Arguments:
4059 paddr pointer to pointer to current character; updated
4060 type 0 => read a time; 1 => read a fixed point number
4061
4062 Returns: time in seconds or fixed point number * 1000
4063 */
4064
4065 static int
4066 retry_arg(const uschar **paddr, int type)
4067 {
4068 const uschar *p = *paddr;
4069 const uschar *pp;
4070
4071 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4072
4073 while (isspace(*p)) p++;
4074 pp = p;
4075 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4076
4077 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4078 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4079
4080 *paddr = p;
4081 switch (type)
4082 {
4083 case 0: return readconf_readtime(pp, *p, FALSE);
4084 case 1: return readconf_readfixed(pp, *p);
4085 }
4086 return 0; /* Keep picky compilers happy */
4087 }
4088
4089 /* The function proper */
4090
4091 void
4092 readconf_retries(void)
4093 {
4094 retry_config **chain = &retries;
4095 retry_config *next;
4096 const uschar *p;
4097
4098 while ((p = get_config_line()))
4099 {
4100 retry_rule **rchain;
4101 const uschar *pp;
4102 uschar *error;
4103
4104 next = store_get(sizeof(retry_config));
4105 next->next = NULL;
4106 *chain = next;
4107 chain = &(next->next);
4108 next->basic_errno = next->more_errno = 0;
4109 next->senders = NULL;
4110 next->rules = NULL;
4111 rchain = &(next->rules);
4112
4113 next->pattern = string_dequote(&p);
4114 while (isspace(*p)) p++;
4115 pp = p;
4116 while (mac_isgraph(*p)) p++;
4117 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4118 "missing error type in retry rule");
4119
4120 /* Test error names for things we understand. */
4121
4122 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4123 &next->more_errno)))
4124 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4125
4126 /* There may be an optional address list of senders to be used as another
4127 constraint on the rule. This was added later, so the syntax is a bit of a
4128 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4129 an address list. */
4130
4131 while (isspace(*p)) p++;
4132 if (Ustrncmp(p, "senders", 7) == 0)
4133 {
4134 p += 7;
4135 while (isspace(*p)) p++;
4136 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4137 "\"=\" expected after \"senders\" in retry rule");
4138 while (isspace(*p)) p++;
4139 next->senders = string_dequote(&p);
4140 }
4141
4142 /* Now the retry rules. Keep the maximum timeout encountered. */
4143
4144 while (isspace(*p)) p++;
4145
4146 while (*p != 0)
4147 {
4148 retry_rule *rule = store_get(sizeof(retry_rule));
4149 *rchain = rule;
4150 rchain = &(rule->next);
4151 rule->next = NULL;
4152 rule->rule = toupper(*p++);
4153 rule->timeout = retry_arg(&p, 0);
4154 if (rule->timeout > retry_maximum_timeout)
4155 retry_maximum_timeout = rule->timeout;
4156
4157 switch (rule->rule)
4158 {
4159 case 'F': /* Fixed interval */
4160 rule->p1 = retry_arg(&p, 0);
4161 break;
4162
4163 case 'G': /* Geometrically increasing intervals */
4164 case 'H': /* Ditto, but with randomness */
4165 rule->p1 = retry_arg(&p, 0);
4166 rule->p2 = retry_arg(&p, 1);
4167 break;
4168
4169 default:
4170 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4171 break;
4172 }
4173
4174 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4175 (rule->rule != 'F' && rule->p2 < 1000))
4176 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4177 "bad parameters for retry rule");
4178
4179 while (isspace(*p)) p++;
4180 if (*p == ';')
4181 {
4182 p++;
4183 while (isspace(*p)) p++;
4184 }
4185 else if (*p != 0)
4186 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4187 }
4188 }
4189 }
4190
4191
4192
4193 /*************************************************
4194 * Initialize authenticators *
4195 *************************************************/
4196
4197 /* Read the authenticators section of the configuration file.
4198
4199 Arguments: none
4200 Returns: nothing
4201 */
4202
4203 static void
4204 auths_init(void)
4205 {
4206 #ifdef EXPERIMENTAL_PIPE_CONNECT
4207 int nauths = 0;
4208 #endif
4209
4210 readconf_driver_init(US"authenticator",
4211 (driver_instance **)(&auths), /* chain anchor */
4212 (driver_info *)auths_available, /* available drivers */
4213 sizeof(auth_info), /* size of info block */
4214 &auth_defaults, /* default values for generic options */
4215 sizeof(auth_instance), /* size of instance block */
4216 optionlist_auths, /* generic options */
4217 optionlist_auths_size);
4218
4219 for (auth_instance * au = auths; au; au = au->next)
4220 {
4221 if (!au->public_name)
4222 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4223 "the %s authenticator", au->name);
4224
4225 for (auth_instance * bu = au->next; bu; bu = bu->next)
4226 if (strcmpic(au->public_name, bu->public_name) == 0)
4227 if ((au->client && bu->client) || (au->server && bu->server))
4228 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4229 "(%s and %s) have the same public name (%s)",
4230 au->client ? US"client" : US"server", au->name, bu->name,
4231 au->public_name);
4232 #ifdef EXPERIMENTAL_PIPE_CONNECT
4233 nauths++;
4234 #endif
4235 }
4236 #ifdef EXPERIMENTAL_PIPE_CONNECT
4237 f.smtp_in_early_pipe_no_auth = nauths > 16;
4238 #endif
4239 }
4240
4241
4242
4243
4244 /*************************************************
4245 * Read ACL information *
4246 *************************************************/
4247
4248 /* If this run of Exim is not doing something that involves receiving a
4249 message, we can just skip over the ACL information. No need to parse it.
4250
4251 First, we have a function for acl_read() to call back to get the next line. We
4252 need to remember the line we passed, because at the end it will contain the
4253 name of the next ACL. */
4254
4255 static uschar *acl_line;
4256
4257 static uschar *
4258 acl_callback(void)
4259 {
4260 acl_line = get_config_line();
4261 return acl_line;
4262 }
4263
4264
4265 /* Now the main function:
4266
4267 Arguments: none
4268 Returns: nothing
4269 */
4270
4271 static void
4272 readconf_acl(void)
4273 {
4274 uschar *p;
4275
4276 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4277 between ACLs. */
4278
4279 acl_line = get_config_line();
4280
4281 while(acl_line)
4282 {
4283 uschar name[64];
4284 tree_node *node;
4285 uschar *error;
4286
4287 p = readconf_readname(name, sizeof(name), acl_line);
4288 if (isupper(*name) && *p == '=')
4289 {
4290 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4291 acl_line = get_config_line();
4292 continue;
4293 }
4294
4295 if (*p != ':' || name[0] == 0)
4296 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4297
4298 node = store_get(sizeof(tree_node) + Ustrlen(name));
4299 Ustrcpy(node->name, name);
4300 if (!tree_insertnode(&acl_anchor, node))
4301 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4302 "there are two ACLs called \"%s\"", name);
4303
4304 node->data.ptr = acl_read(acl_callback, &error);
4305
4306 if (node->data.ptr == NULL && error != NULL)
4307 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4308 }
4309 }
4310
4311
4312
4313 /*************************************************
4314 * Read configuration for local_scan() *
4315 *************************************************/
4316
4317 /* This function is called after "begin local_scan" is encountered in the
4318 configuration file. If the local_scan() function allows for configuration
4319 options, we can process them. Otherwise, we expire in a panic.
4320
4321 Arguments: none
4322 Returns: nothing
4323 */
4324
4325 static void
4326 local_scan_init(void)
4327 {
4328 #ifndef LOCAL_SCAN_HAS_OPTIONS
4329 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4330 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4331 #else
4332
4333 uschar *p;
4334 while ((p = get_config_line()))
4335 {
4336 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4337 NULL, US"local_scan option \"%s\" unknown");
4338 }
4339 #endif
4340 }
4341
4342
4343
4344 /*************************************************
4345 * Read rest of configuration (after main) *
4346 *************************************************/
4347
4348 /* This function reads the rest of the runtime configuration, after the main
4349 configuration. It is called only when actually needed. Each subsequent section
4350 of the configuration starts with a line of the form
4351
4352 begin name
4353
4354 where the name is "routers", "transports", etc. A section is terminated by
4355 hitting the next "begin" line, and the next name is left in next_section.
4356 Because it may confuse people as to whether the names are singular or plural,
4357 we add "s" if it's missing. There is always enough room in next_section for
4358 this. This function is basically just a switch.
4359
4360 Arguments: none
4361 Returns: nothing
4362 */
4363
4364 static uschar *section_list[] = {
4365 US"acls",
4366 US"authenticators",
4367 US"local_scans",
4368 US"retrys",
4369 US"rewrites",
4370 US"routers",
4371 US"transports"};
4372
4373 void
4374 readconf_rest(void)
4375 {
4376 int had = 0;
4377
4378 while(next_section[0] != 0)
4379 {
4380 int bit;
4381 int first = 0;
4382 int last = nelem(section_list);
4383 int mid = last/2;
4384 int n = Ustrlen(next_section);
4385
4386 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4387
4388 for (;;)
4389 {
4390 int c = strcmpic(next_section, section_list[mid]);
4391 if (c == 0) break;
4392 if (c > 0) first = mid + 1; else last = mid;
4393 if (first >= last)
4394 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4395 "\"%.*s\" is not a known configuration section name", n, next_section);
4396 mid = (last + first)/2;
4397 }
4398
4399 bit = 1 << mid;
4400 if (((had ^= bit) & bit) == 0)
4401 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4402 "\"%.*s\" section is repeated in the configuration file", n,
4403 next_section);
4404
4405 switch(mid)
4406 {
4407 case 0: readconf_acl(); break;
4408 case 1: auths_init(); break;
4409 case 2: local_scan_init(); break;
4410 case 3: readconf_retries(); break;
4411 case 4: readconf_rewrites(); break;
4412 case 5: route_init(); break;
4413 case 6: transport_init(); break;
4414 }
4415 }
4416
4417 (void)fclose(config_file);
4418 }
4419
4420 /* Init the storage for the pre-parsed config lines */
4421 void
4422 readconf_save_config(const uschar *s)
4423 {
4424 save_config_line(string_sprintf("# Exim Configuration (%s)",
4425 f.running_in_test_harness ? US"X" : s));
4426 }
4427
4428 static void
4429 save_config_position(const uschar *file, int line)
4430 {
4431 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4432 }
4433
4434 /* Append a pre-parsed logical line to the config lines store,
4435 this operates on a global (static) list that holds all the pre-parsed
4436 config lines, we do no further processing here, output formatting and
4437 honouring of <hide> or macros will be done during output */
4438
4439 static void
4440 save_config_line(const uschar* line)
4441 {
4442 static config_line_item *current;
4443 config_line_item *next;
4444
4445 next = (config_line_item*) store_get(sizeof(config_line_item));
4446 next->line = string_copy(line);
4447 next->next = NULL;
4448
4449 if (!config_lines) config_lines = next;
4450 else current->next = next;
4451
4452 current = next;
4453 }
4454
4455 /* List the parsed config lines, care about nice formatting and
4456 hide the <hide> values unless we're the admin user */
4457 void
4458 print_config(BOOL admin, BOOL terse)
4459 {
4460 const int TS = terse ? 0 : 2;
4461 int indent = 0;
4462
4463 for (config_line_item * i = config_lines; i; i = i->next)
4464 {
4465 uschar *current;
4466 uschar *p;
4467
4468 /* skip over to the first non-space */
4469 for (current = i->line; *current && isspace(*current); ++current)
4470 ;
4471
4472 if (*current == '\0')
4473 continue;
4474
4475 /* Collapse runs of spaces. We stop this if we encounter one of the
4476 * following characters: "'$, as this may indicate careful formatting */
4477 for (p = current; *p; ++p)
4478 {
4479 uschar *next;
4480 if (!isspace(*p)) continue;
4481 if (*p != ' ') *p = ' ';
4482
4483 for (next = p; isspace(*next); ++next)
4484 ;
4485
4486 if (next - p > 1)
4487 memmove(p+1, next, Ustrlen(next)+1);
4488
4489 if (*next == '"' || *next == '\'' || *next == '$')
4490 break;
4491 }
4492
4493 /* # lines */
4494 if (current[0] == '#')
4495 puts(CCS current);
4496
4497 /* begin lines are left aligned */
4498 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4499 {
4500 if (!terse) puts("");
4501 puts(CCS current);
4502 indent = TS;
4503 }
4504
4505 /* router/acl/transport block names */
4506 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4507 {
4508 if (!terse) puts("");
4509 printf("%*s%s\n", TS, "", current);
4510 indent = 2 * TS;
4511 }
4512
4513 /* hidden lines (all MACROS or lines prefixed with "hide") */
4514 else if ( !admin
4515 && ( isupper(*current)
4516 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4517 )
4518 )
4519 {
4520 if ((p = Ustrchr(current, '=')))
4521 {
4522 *p = '\0';
4523 printf("%*s%s= %s\n", indent, "", current, hidden);
4524 }
4525 /* e.g.: hide split_spool_directory */
4526 else
4527 printf("%*s\n", indent, hidden);
4528 }
4529
4530 else
4531 /* rest is public */
4532 printf("%*s%s\n", indent, "", current);
4533 }
4534 }
4535
4536 #endif /*!MACRO_PREDEF*/
4537 /* vi: aw ai sw=2
4538 */
4539 /* End of readconf.c */
Unnamed repository; edit this file 'description' to name the repository.