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Fix taint-checking on OpenBSD
[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 #ifndef DISABLE_TLS
64 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
65 #endif
66 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
67 { "add_environment", opt_stringptr, &add_environment },
68 { "admin_groups", opt_gidlist, &admin_groups },
69 { "allow_domain_literals", opt_bool, &allow_domain_literals },
70 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
71 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
72 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
73 { "auto_thaw", opt_time, &auto_thaw },
74 #ifdef WITH_CONTENT_SCAN
75 { "av_scanner", opt_stringptr, &av_scanner },
76 #endif
77 { "bi_command", opt_stringptr, &bi_command },
78 #ifdef EXPERIMENTAL_BRIGHTMAIL
79 { "bmi_config_file", opt_stringptr, &bmi_config_file },
80 #endif
81 { "bounce_message_file", opt_stringptr, &bounce_message_file },
82 { "bounce_message_text", opt_stringptr, &bounce_message_text },
83 { "bounce_return_body", opt_bool, &bounce_return_body },
84 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
85 { "bounce_return_message", opt_bool, &bounce_return_message },
86 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
87 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
88 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
89 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
90 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
91 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
92 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
93 { "check_log_inodes", opt_int, &check_log_inodes },
94 { "check_log_space", opt_Kint, &check_log_space },
95 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
96 { "check_spool_inodes", opt_int, &check_spool_inodes },
97 { "check_spool_space", opt_Kint, &check_spool_space },
98 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
99 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
100 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
101 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
102 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
103 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
104 #ifdef EXPERIMENTAL_DCC
105 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
106 { "dccifd_address", opt_stringptr, &dccifd_address },
107 { "dccifd_options", opt_stringptr, &dccifd_options },
108 #endif
109 { "debug_store", opt_bool, &debug_store },
110 { "delay_warning", opt_timelist, &delay_warning },
111 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
112 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
113 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
114 { "delivery_date_remove", opt_bool, &delivery_date_remove },
115 #ifdef ENABLE_DISABLE_FSYNC
116 { "disable_fsync", opt_bool, &disable_fsync },
117 #endif
118 { "disable_ipv6", opt_bool, &disable_ipv6 },
119 #ifndef DISABLE_DKIM
120 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
121 #endif
122 #ifdef EXPERIMENTAL_DMARC
123 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
124 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
125 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
126 #endif
127 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
128 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
129 { "dns_cname_loops", opt_int, &dns_cname_loops },
130 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
131 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
132 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
133 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
134 { "dns_retrans", opt_time, &dns_retrans },
135 { "dns_retry", opt_int, &dns_retry },
136 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
137 { "dns_use_edns0", opt_int, &dns_use_edns0 },
138 /* This option is now a no-op, retained for compatibility */
139 { "drop_cr", opt_bool, &drop_cr },
140 /*********************************************************/
141 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
142 { "dsn_from", opt_stringptr, &dsn_from },
143 { "envelope_to_remove", opt_bool, &envelope_to_remove },
144 { "errors_copy", opt_stringptr, &errors_copy },
145 { "errors_reply_to", opt_stringptr, &errors_reply_to },
146 #ifndef DISABLE_EVENT
147 { "event_action", opt_stringptr, &event_action },
148 #endif
149 { "exim_group", opt_gid, &exim_gid },
150 { "exim_path", opt_stringptr, &exim_path },
151 { "exim_user", opt_uid, &exim_uid },
152 { "exim_version", opt_stringptr, &version_string },
153 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
154 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
155 { "finduser_retries", opt_int, &finduser_retries },
156 { "freeze_tell", opt_stringptr, &freeze_tell },
157 { "gecos_name", opt_stringptr, &gecos_name },
158 { "gecos_pattern", opt_stringptr, &gecos_pattern },
159 #ifndef DISABLE_TLS
160 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
161 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
162 #endif
163 { "header_line_maxsize", opt_int, &header_line_maxsize },
164 { "header_maxsize", opt_int, &header_maxsize },
165 { "headers_charset", opt_stringptr, &headers_charset },
166 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
167 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
168 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
169 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
170 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
171 { "hold_domains", opt_stringptr, &hold_domains },
172 { "host_lookup", opt_stringptr, &host_lookup },
173 { "host_lookup_order", opt_stringptr, &host_lookup_order },
174 { "host_reject_connection", opt_stringptr, &host_reject_connection },
175 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
176 #ifdef SUPPORT_PROXY
177 { "hosts_proxy", opt_stringptr, &hosts_proxy },
178 #endif
179 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
180 #ifdef LOOKUP_IBASE
181 { "ibase_servers", opt_stringptr, &ibase_servers },
182 #endif
183 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
184 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
185 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
186 { "keep_environment", opt_stringptr, &keep_environment },
187 { "keep_malformed", opt_time, &keep_malformed },
188 #ifdef LOOKUP_LDAP
189 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
190 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
191 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
192 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
193 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
194 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
195 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
196 { "ldap_start_tls", opt_bool, &eldap_start_tls },
197 { "ldap_version", opt_int, &eldap_version },
198 #endif
199 { "local_from_check", opt_bool, &local_from_check },
200 { "local_from_prefix", opt_stringptr, &local_from_prefix },
201 { "local_from_suffix", opt_stringptr, &local_from_suffix },
202 { "local_interfaces", opt_stringptr, &local_interfaces },
203 #ifdef HAVE_LOCAL_SCAN
204 { "local_scan_timeout", opt_time, &local_scan_timeout },
205 #endif
206 { "local_sender_retain", opt_bool, &local_sender_retain },
207 { "localhost_number", opt_stringptr, &host_number_string },
208 { "log_file_path", opt_stringptr, &log_file_path },
209 { "log_selector", opt_stringptr, &log_selector_string },
210 { "log_timezone", opt_bool, &log_timezone },
211 { "lookup_open_max", opt_int, &lookup_open_max },
212 { "max_username_length", opt_int, &max_username_length },
213 { "message_body_newlines", opt_bool, &message_body_newlines },
214 { "message_body_visible", opt_mkint, &message_body_visible },
215 { "message_id_header_domain", opt_stringptr, &message_id_domain },
216 { "message_id_header_text", opt_stringptr, &message_id_text },
217 { "message_logs", opt_bool, &message_logs },
218 { "message_size_limit", opt_stringptr, &message_size_limit },
219 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
220 { "move_frozen_messages", opt_bool, &move_frozen_messages },
221 #endif
222 { "mua_wrapper", opt_bool, &mua_wrapper },
223 #ifdef LOOKUP_MYSQL
224 { "mysql_servers", opt_stringptr, &mysql_servers },
225 #endif
226 { "never_users", opt_uidlist, &never_users },
227 #ifndef DISABLE_TLS
228 { "openssl_options", opt_stringptr, &openssl_options },
229 #endif
230 #ifdef LOOKUP_ORACLE
231 { "oracle_servers", opt_stringptr, &oracle_servers },
232 #endif
233 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
234 #ifdef EXIM_PERL
235 { "perl_at_start", opt_bool, &opt_perl_at_start },
236 { "perl_startup", opt_stringptr, &opt_perl_startup },
237 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
238 #endif
239 #ifdef LOOKUP_PGSQL
240 { "pgsql_servers", opt_stringptr, &pgsql_servers },
241 #endif
242 { "pid_file_path", opt_stringptr, &pid_file_path },
243 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
244 #ifdef SUPPORT_PIPE_CONNECT
245 { "pipelining_connect_advertise_hosts", opt_stringptr,
246 &pipe_connect_advertise_hosts },
247 #endif
248 #ifndef DISABLE_PRDR
249 { "prdr_enable", opt_bool, &prdr_enable },
250 #endif
251 { "preserve_message_logs", opt_bool, &preserve_message_logs },
252 { "primary_hostname", opt_stringptr, &primary_hostname },
253 { "print_topbitchars", opt_bool, &print_topbitchars },
254 { "process_log_path", opt_stringptr, &process_log_path },
255 { "prod_requires_admin", opt_bool, &prod_requires_admin },
256 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
257 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
258 { "queue_domains", opt_stringptr, &queue_domains },
259 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
260 { "queue_only", opt_bool, &queue_only },
261 { "queue_only_file", opt_stringptr, &queue_only_file },
262 { "queue_only_load", opt_fixed, &queue_only_load },
263 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
264 { "queue_only_override", opt_bool, &queue_only_override },
265 { "queue_run_in_order", opt_bool, &queue_run_in_order },
266 { "queue_run_max", opt_stringptr, &queue_run_max },
267 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
268 { "receive_timeout", opt_time, &receive_timeout },
269 { "received_header_text", opt_stringptr, &received_header_text },
270 { "received_headers_max", opt_int, &received_headers_max },
271 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
272 { "recipients_max", opt_int, &recipients_max },
273 { "recipients_max_reject", opt_bool, &recipients_max_reject },
274 #ifdef LOOKUP_REDIS
275 { "redis_servers", opt_stringptr, &redis_servers },
276 #endif
277 { "remote_max_parallel", opt_int, &remote_max_parallel },
278 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
279 { "retry_data_expire", opt_time, &retry_data_expire },
280 { "retry_interval_max", opt_time, &retry_interval_max },
281 { "return_path_remove", opt_bool, &return_path_remove },
282 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
283 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
284 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
285 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
286 { "slow_lookup_log", opt_int, &slow_lookup_log },
287 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
288 { "smtp_accept_max", opt_int, &smtp_accept_max },
289 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
290 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
291 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
292 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
293 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
294 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
295 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
296 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
297 { "smtp_banner", opt_stringptr, &smtp_banner },
298 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
299 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
300 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
301 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
302 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
303 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
304 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
305 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
306 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
307 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
308 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
309 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
310 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
311 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
312 #ifdef SUPPORT_I18N
313 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
314 #endif
315 #ifdef WITH_CONTENT_SCAN
316 { "spamd_address", opt_stringptr, &spamd_address },
317 #endif
318 #ifdef SUPPORT_SPF
319 { "spf_guess", opt_stringptr, &spf_guess },
320 #endif
321 { "split_spool_directory", opt_bool, &split_spool_directory },
322 { "spool_directory", opt_stringptr, &spool_directory },
323 { "spool_wireformat", opt_bool, &spool_wireformat },
324 #ifdef LOOKUP_SQLITE
325 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
326 #endif
327 #ifdef EXPERIMENTAL_SRS
328 { "srs_config", opt_stringptr, &srs_config },
329 { "srs_hashlength", opt_int, &srs_hashlength },
330 { "srs_hashmin", opt_int, &srs_hashmin },
331 { "srs_maxage", opt_int, &srs_maxage },
332 { "srs_secrets", opt_stringptr, &srs_secrets },
333 { "srs_usehash", opt_bool, &srs_usehash },
334 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
335 #endif
336 { "strict_acl_vars", opt_bool, &strict_acl_vars },
337 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
338 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
339 { "syslog_duplication", opt_bool, &syslog_duplication },
340 { "syslog_facility", opt_stringptr, &syslog_facility_str },
341 { "syslog_pid", opt_bool, &syslog_pid },
342 { "syslog_processname", opt_stringptr, &syslog_processname },
343 { "syslog_timestamp", opt_bool, &syslog_timestamp },
344 { "system_filter", opt_stringptr, &system_filter },
345 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
346 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
347 { "system_filter_group", opt_gid, &system_filter_gid },
348 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
349 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
350 { "system_filter_user", opt_uid, &system_filter_uid },
351 { "tcp_nodelay", opt_bool, &tcp_nodelay },
352 #ifdef USE_TCP_WRAPPERS
353 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
354 #endif
355 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
356 { "timezone", opt_stringptr, &timezone_string },
357 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
358 #ifndef DISABLE_TLS
359 { "tls_certificate", opt_stringptr, &tls_certificate },
360 { "tls_crl", opt_stringptr, &tls_crl },
361 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
362 { "tls_dhparam", opt_stringptr, &tls_dhparam },
363 { "tls_eccurve", opt_stringptr, &tls_eccurve },
364 # ifndef DISABLE_OCSP
365 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
366 # endif
367 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
368 { "tls_privatekey", opt_stringptr, &tls_privatekey },
369 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
370 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
371 # ifdef EXPERIMENTAL_TLS_RESUME
372 { "tls_resumption_hosts", opt_stringptr, &tls_resumption_hosts },
373 # endif
374 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
375 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
376 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
377 #endif
378 { "trusted_groups", opt_gidlist, &trusted_groups },
379 { "trusted_users", opt_uidlist, &trusted_users },
380 { "unknown_login", opt_stringptr, &unknown_login },
381 { "unknown_username", opt_stringptr, &unknown_username },
382 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
383 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
384 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
385 { "warn_message_file", opt_stringptr, &warn_message_file },
386 { "write_rejectlog", opt_bool, &write_rejectlog }
387 };
388
389 #ifndef MACRO_PREDEF
390 static int optionlist_config_size = nelem(optionlist_config);
391 #endif
392
393
394 #ifdef MACRO_PREDEF
395
396 static void
397 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
398
399 void
400 options_main(void)
401 {
402 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
403 }
404
405 void
406 options_auths(void)
407 {
408 uschar buf[64];
409
410 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
411
412 for (struct auth_info * ai = auths_available; ai->driver_name[0]; ai++)
413 {
414 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
415 builtin_macro_create(buf);
416 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
417 }
418 }
419
420 void
421 options_logging(void)
422 {
423 uschar buf[64];
424
425 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
426 {
427 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
428 builtin_macro_create(buf);
429 }
430 }
431
432
433 #else /*!MACRO_PREDEF*/
434
435 extern char **environ;
436
437 static void save_config_line(const uschar* line);
438 static void save_config_position(const uschar *file, int line);
439 static void print_config(BOOL admin, BOOL terse);
440
441
442 #define CSTATE_STACK_SIZE 10
443
444 const uschar *config_directory = NULL;
445
446
447 /* Structure for chain (stack) of .included files */
448
449 typedef struct config_file_item {
450 struct config_file_item *next;
451 const uschar *filename;
452 const uschar *directory;
453 FILE *file;
454 int lineno;
455 } config_file_item;
456
457 /* Structure for chain of configuration lines (-bP config) */
458
459 typedef struct config_line_item {
460 struct config_line_item *next;
461 uschar *line;
462 } config_line_item;
463
464 static config_line_item* config_lines;
465
466 /* Structure of table of conditional words and their state transitions */
467
468 typedef struct cond_item {
469 uschar *name;
470 int namelen;
471 int action1;
472 int action2;
473 int pushpop;
474 } cond_item;
475
476 /* Structure of table of syslog facility names and values */
477
478 typedef struct syslog_fac_item {
479 uschar *name;
480 int value;
481 } syslog_fac_item;
482
483 /* constants */
484 static const char * const hidden = "<value not displayable>";
485
486 /* Static variables */
487
488 static config_file_item *config_file_stack = NULL; /* For includes */
489
490 static uschar *syslog_facility_str = NULL;
491 static uschar next_section[24];
492 static uschar time_buffer[24];
493
494 /* State variables for conditional loading (.ifdef / .else / .endif) */
495
496 static int cstate = 0;
497 static int cstate_stack_ptr = -1;
498 static int cstate_stack[CSTATE_STACK_SIZE];
499
500 /* Table of state transitions for handling conditional inclusions. There are
501 four possible state transitions:
502
503 .ifdef true
504 .ifdef false
505 .elifdef true (or .else)
506 .elifdef false
507
508 .endif just causes the previous cstate to be popped off the stack */
509
510 static int next_cstate[3][4] =
511 {
512 /* State 0: reading from file, or reading until next .else or .endif */
513 { 0, 1, 2, 2 },
514 /* State 1: condition failed, skipping until next .else or .endif */
515 { 2, 2, 0, 1 },
516 /* State 2: skipping until .endif */
517 { 2, 2, 2, 2 },
518 };
519
520 /* Table of conditionals and the states to set. For each name, there are four
521 values: the length of the name (to save computing it each time), the state to
522 set if a macro was found in the line, the state to set if a macro was not found
523 in the line, and a stack manipulation setting which is:
524
525 -1 pull state value off the stack
526 0 don't alter the stack
527 +1 push value onto stack, before setting new state
528 */
529
530 static cond_item cond_list[] = {
531 { US"ifdef", 5, 0, 1, 1 },
532 { US"ifndef", 6, 1, 0, 1 },
533 { US"elifdef", 7, 2, 3, 0 },
534 { US"elifndef", 8, 3, 2, 0 },
535 { US"else", 4, 2, 2, 0 },
536 { US"endif", 5, 0, 0, -1 }
537 };
538
539 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
540
541 /* Table of syslog facility names and their values */
542
543 static syslog_fac_item syslog_list[] = {
544 { US"mail", LOG_MAIL },
545 { US"user", LOG_USER },
546 { US"news", LOG_NEWS },
547 { US"uucp", LOG_UUCP },
548 { US"local0", LOG_LOCAL0 },
549 { US"local1", LOG_LOCAL1 },
550 { US"local2", LOG_LOCAL2 },
551 { US"local3", LOG_LOCAL3 },
552 { US"local4", LOG_LOCAL4 },
553 { US"local5", LOG_LOCAL5 },
554 { US"local6", LOG_LOCAL6 },
555 { US"local7", LOG_LOCAL7 },
556 { US"daemon", LOG_DAEMON }
557 };
558
559 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
560
561
562 #define opt_fn_print BIT(0)
563 #define opt_fn_print_label BIT(1)
564
565
566 /*************************************************
567 * Find the name of an option *
568 *************************************************/
569
570 /* This function is to aid debugging. Various functions take arguments that are
571 pointer variables in the options table or in option tables for various drivers.
572 For debugging output, it is useful to be able to find the name of the option
573 which is currently being processed. This function finds it, if it exists, by
574 searching the table(s).
575
576 Arguments: a value that is presumed to be in the table above
577 Returns: the option name, or an empty string
578 */
579
580 uschar *
581 readconf_find_option(void *p)
582 {
583 for (int i = 0; i < nelem(optionlist_config); i++)
584 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
585
586 for (router_instance * r = routers; r; r = r->next)
587 {
588 router_info *ri = r->info;
589 for (int i = 0; i < *ri->options_count; i++)
590 {
591 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
592 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
593 return US ri->options[i].name;
594 }
595 }
596
597 for (transport_instance * t = transports; t; t = t->next)
598 {
599 transport_info *ti = t->info;
600 for (int i = 0; i < *ti->options_count; i++)
601 {
602 optionlist * op = &ti->options[i];
603 if ((op->type & opt_mask) != opt_stringptr) continue;
604 if (p == ( op->type & opt_public
605 ? CS t
606 : CS t->options_block
607 )
608 + (long int)op->value)
609 return US op->name;
610 }
611 }
612
613 return US"";
614 }
615
616
617
618
619 /*************************************************
620 * Deal with an assignment to a macro *
621 *************************************************/
622
623 /* We have a new definition; append to the list.
624
625 Args:
626 name Name of the macro; will be copied
627 val Expansion result for the macro; will be copied
628 */
629
630 macro_item *
631 macro_create(const uschar * name, const uschar * val, BOOL command_line)
632 {
633 macro_item * m = store_get(sizeof(macro_item), FALSE);
634
635 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
636 m->next = NULL;
637 m->command_line = command_line;
638 m->namelen = Ustrlen(name);
639 m->replen = Ustrlen(val);
640 m->name = string_copy(name);
641 m->replacement = string_copy(val);
642 if (mlast)
643 mlast->next = m;
644 else
645 macros = m;
646 mlast = m;
647 if (!macros_user)
648 macros_user = m;
649 return m;
650 }
651
652
653 /* This function is called when a line that starts with an upper case letter is
654 encountered. The argument "line" should contain a complete logical line, and
655 start with the first letter of the macro name. The macro name and the
656 replacement text are extracted and stored. Redefinition of existing,
657 non-command line, macros is permitted using '==' instead of '='.
658
659 Arguments:
660 s points to the start of the logical line
661
662 Returns: FALSE iff fatal error
663 */
664
665 BOOL
666 macro_read_assignment(uschar *s)
667 {
668 uschar name[64];
669 int namelen = 0;
670 BOOL redef = FALSE;
671 macro_item *m;
672
673 while (isalnum(*s) || *s == '_')
674 {
675 if (namelen >= sizeof(name) - 1)
676 {
677 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
678 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
679 return FALSE;
680 }
681 name[namelen++] = *s++;
682 }
683 name[namelen] = 0;
684
685 while (isspace(*s)) s++;
686 if (*s++ != '=')
687 {
688 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
689 return FALSE;
690 }
691
692 if (*s == '=')
693 {
694 redef = TRUE;
695 s++;
696 }
697 while (isspace(*s)) s++;
698
699 /* If an existing macro of the same name was defined on the command line, we
700 just skip this definition. It's an error to attempt to redefine a macro without
701 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
702 It is also an error to define a macro whose name begins with the name of a
703 previously defined macro. This is the requirement that make using a tree
704 for macros hard; we must check all macros for the substring. Perhaps a
705 sorted list, and a bsearch, would work?
706 Note: it is documented that the other way round works. */
707
708 for (m = macros; m; m = m->next)
709 {
710 if (Ustrcmp(m->name, name) == 0)
711 {
712 if (!m->command_line && !redef)
713 {
714 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
715 "defined (use \"==\" if you want to redefine it)", name);
716 return FALSE;
717 }
718 break;
719 }
720
721 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
722 {
723 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
724 "a macro because previously defined macro \"%s\" is a substring",
725 name, m->name);
726 return FALSE;
727 }
728
729 /* We cannot have this test, because it is documented that a substring
730 macro is permitted (there is even an example).
731 *
732 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
733 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
734 * "a macro because it is a substring of previously defined macro \"%s\"",
735 * name, m->name);
736 */
737 }
738
739 /* Check for an overriding command-line definition. */
740
741 if (m && m->command_line) return TRUE;
742
743 /* Redefinition must refer to an existing macro. */
744
745 if (redef)
746 if (m)
747 {
748 m->replen = Ustrlen(s);
749 m->replacement = string_copy(s);
750 }
751 else
752 {
753 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
754 "\"%s\"", name);
755 return FALSE;
756 }
757
758 /* We have a new definition. */
759 else
760 (void) macro_create(name, s, FALSE);
761 return TRUE;
762 }
763
764
765
766
767
768 /* Process line for macros. The line is in big_buffer starting at offset len.
769 Expand big_buffer if needed. Handle definitions of new macros, and
770 macro expansions, rewriting the line in the buffer.
771
772 Arguments:
773 len Offset in buffer of start of line
774 newlen Pointer to offset of end of line, updated on return
775 macro_found Pointer to return that a macro was expanded
776
777 Return: pointer to first nonblank char in line
778 */
779
780 uschar *
781 macros_expand(int len, int * newlen, BOOL * macro_found)
782 {
783 uschar * ss = big_buffer + len;
784 uschar * s;
785
786 /* Find the true start of the physical line - leading spaces are always
787 ignored. */
788
789 while (isspace(*ss)) ss++;
790
791 /* Process the physical line for macros. If this is the start of the logical
792 line, skip over initial text at the start of the line if it starts with an
793 upper case character followed by a sequence of name characters and an equals
794 sign, because that is the definition of a new macro, and we don't do
795 replacement therein. */
796
797 s = ss;
798 if (len == 0 && isupper(*s))
799 {
800 while (isalnum(*s) || *s == '_') s++;
801 while (isspace(*s)) s++;
802 if (*s != '=') s = ss; /* Not a macro definition */
803 }
804
805 /* Skip leading chars which cannot start a macro name, to avoid multiple
806 pointless rescans in Ustrstr calls. */
807
808 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
809
810 /* For each defined macro, scan the line (from after XXX= if present),
811 replacing all occurrences of the macro. */
812
813 *macro_found = FALSE;
814 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
815 {
816 uschar * p, *pp;
817 uschar * t;
818
819 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
820 if (!*s) break;
821
822 t = s;
823 while ((p = Ustrstr(t, m->name)) != NULL)
824 {
825 int moveby;
826
827 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
828 m->name, (int) Ustrlen(ss)-1, ss);
829 /* Expand the buffer if necessary */
830
831 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
832 {
833 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
834 uschar *newbuffer = store_malloc(newsize);
835 memcpy(newbuffer, big_buffer, *newlen + 1);
836 p = newbuffer + (p - big_buffer);
837 s = newbuffer + (s - big_buffer);
838 ss = newbuffer + (ss - big_buffer);
839 t = newbuffer + (t - big_buffer);
840 big_buffer_size = newsize;
841 store_free(big_buffer);
842 big_buffer = newbuffer;
843 }
844
845 /* Shuffle the remaining characters up or down in the buffer before
846 copying in the replacement text. Don't rescan the replacement for this
847 same macro. */
848
849 pp = p + m->namelen;
850 if ((moveby = m->replen - m->namelen) != 0)
851 {
852 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
853 *newlen += moveby;
854 }
855 Ustrncpy(p, m->replacement, m->replen);
856 t = p + m->replen;
857 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
858 *macro_found = TRUE;
859 }
860 }
861
862 /* An empty macro replacement at the start of a line could mean that ss no
863 longer points to the first non-blank character. */
864
865 while (isspace(*ss)) ss++;
866 return ss;
867 }
868
869 /*************************************************
870 * Read configuration line *
871 *************************************************/
872
873 /* A logical line of text is read from the configuration file into the big
874 buffer, taking account of macros, .includes, and continuations. The size of
875 big_buffer is increased if necessary. The count of configuration lines is
876 maintained. Physical input lines starting with # (ignoring leading white space,
877 and after macro replacement) and empty logical lines are always ignored.
878 Leading and trailing spaces are removed.
879
880 If we hit a line of the form "begin xxxx", the xxxx is placed in the
881 next_section vector, and the function returns NULL, indicating the end of a
882 configuration section. On end-of-file, NULL is returned with next_section
883 empty.
884
885 Arguments: none
886
887 Returns: a pointer to the first non-blank in the line,
888 or NULL if eof or end of section is reached
889 */
890
891 static uschar *
892 get_config_line(void)
893 {
894 int startoffset = 0; /* To first non-blank char in logical line */
895 int len = 0; /* Of logical line so far */
896 int newlen;
897 uschar *s, *ss;
898 BOOL macro_found;
899
900 /* Loop for handling continuation lines, skipping comments, and dealing with
901 .include files. */
902
903 for (;;)
904 {
905 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
906 {
907 if (config_file_stack != NULL) /* EOF inside .include */
908 {
909 (void)fclose(config_file);
910 config_file = config_file_stack->file;
911 config_filename = config_file_stack->filename;
912 config_directory = config_file_stack->directory;
913 config_lineno = config_file_stack->lineno;
914 config_file_stack = config_file_stack->next;
915 if (config_lines)
916 save_config_position(config_filename, config_lineno);
917 continue;
918 }
919
920 /* EOF at top level */
921
922 if (cstate_stack_ptr >= 0)
923 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
924 "Unexpected end of configuration file: .endif missing");
925
926 if (len != 0) break; /* EOF after continuation */
927 next_section[0] = 0; /* EOF at start of logical line */
928 return NULL;
929 }
930
931 config_lineno++;
932 newlen = len + Ustrlen(big_buffer + len);
933
934 if (config_lines && config_lineno == 1)
935 save_config_position(config_filename, config_lineno);
936
937 /* Handle pathologically long physical lines - yes, it did happen - by
938 extending big_buffer at this point. The code also copes with very long
939 logical lines. */
940
941 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
942 {
943 uschar *newbuffer;
944 big_buffer_size += BIG_BUFFER_SIZE;
945 newbuffer = store_malloc(big_buffer_size);
946
947 /* This use of strcpy is OK because we know that the string in the old
948 buffer is shorter than the new buffer. */
949
950 Ustrcpy(newbuffer, big_buffer);
951 store_free(big_buffer);
952 big_buffer = newbuffer;
953 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
954 break;
955 newlen += Ustrlen(big_buffer + newlen);
956 }
957
958 ss = macros_expand(len, &newlen, &macro_found);
959
960 /* Check for comment lines - these are physical lines. */
961
962 if (*ss == '#') continue;
963
964 /* Handle conditionals, which are also applied to physical lines. Conditions
965 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
966 expansion occurred on the rest of the line. A preliminary test for the leading
967 '.' saves effort on most lines. */
968
969 if (*ss == '.')
970 {
971 int i;
972
973 /* Search the list of conditional directives */
974
975 for (i = 0; i < cond_list_size; i++)
976 {
977 int n;
978 cond_item *c = cond_list+i;
979 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
980
981 /* The following character must be white space or end of string */
982
983 n = ss[1 + c->namelen];
984 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
985
986 /* .ifdef and .ifndef push the current state onto the stack, then set
987 a new one from the table. Stack overflow is an error */
988
989 if (c->pushpop > 0)
990 {
991 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
992 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
993 ".%s nested too deeply", c->name);
994 cstate_stack[++cstate_stack_ptr] = cstate;
995 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
996 }
997
998 /* For any of the others, stack underflow is an error. The next state
999 comes either from the stack (.endif) or from the table. */
1000
1001 else
1002 {
1003 if (cstate_stack_ptr < 0)
1004 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1005 ".%s without matching .ifdef", c->name);
1006 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1007 next_cstate[cstate][macro_found? c->action1 : c->action2];
1008 }
1009
1010 /* Having dealt with a directive, break the loop */
1011
1012 break;
1013 }
1014
1015 /* If we have handled a conditional directive, continue with the next
1016 physical line. Otherwise, fall through. */
1017
1018 if (i < cond_list_size) continue;
1019 }
1020
1021 /* If the conditional state is not 0 (actively using these lines), ignore
1022 this input line. */
1023
1024 if (cstate != 0) continue; /* Conditional skip */
1025
1026 /* Handle .include lines - these are also physical lines. */
1027
1028 if (Ustrncmp(ss, ".include", 8) == 0 &&
1029 (isspace(ss[8]) ||
1030 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1031 {
1032 uschar *t;
1033 int include_if_exists = isspace(ss[8])? 0 : 10;
1034 config_file_item *save;
1035 struct stat statbuf;
1036
1037 ss += 9 + include_if_exists;
1038 while (isspace(*ss)) ss++;
1039 t = ss + Ustrlen(ss);
1040 while (t > ss && isspace(t[-1])) t--;
1041 if (*ss == '\"' && t[-1] == '\"')
1042 {
1043 ss++;
1044 t--;
1045 }
1046 *t = 0;
1047
1048 /* We allow relative file names. For security reasons currently
1049 relative names not allowed with .include_if_exists. For .include_if_exists
1050 we need to check the permissions/ownership of the containing folder */
1051 if (*ss != '/')
1052 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1053 "absolute path \"%s\"", ss);
1054 else
1055 {
1056 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1057 ss = string_from_gstring(g);
1058 }
1059
1060 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1061
1062 if (config_lines)
1063 save_config_position(config_filename, config_lineno);
1064 save = store_get(sizeof(config_file_item), FALSE);
1065 save->next = config_file_stack;
1066 config_file_stack = save;
1067 save->file = config_file;
1068 save->filename = config_filename;
1069 save->directory = config_directory;
1070 save->lineno = config_lineno;
1071
1072 if (!(config_file = Ufopen(ss, "rb")))
1073 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1074 "configuration file %s", ss);
1075
1076 config_filename = string_copy(ss);
1077 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1078 config_lineno = 0;
1079 continue;
1080 }
1081
1082 /* If this is the start of the logical line, remember where the non-blank
1083 data starts. Otherwise shuffle down continuation lines to remove leading
1084 white space. */
1085
1086 if (len == 0)
1087 startoffset = ss - big_buffer;
1088 else
1089 {
1090 s = big_buffer + len;
1091 if (ss > s)
1092 {
1093 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1094 newlen -= ss - s;
1095 }
1096 }
1097
1098 /* Accept the new addition to the line. Remove trailing white space. */
1099
1100 len = newlen;
1101 while (len > 0 && isspace(big_buffer[len-1])) len--;
1102 big_buffer[len] = 0;
1103
1104 /* We are done if the line does not end in backslash and contains some data.
1105 Empty logical lines are ignored. For continuations, remove the backslash and
1106 go round the loop to read the continuation line. */
1107
1108 if (len > 0)
1109 {
1110 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1111 big_buffer[--len] = 0; /* Remove backslash */
1112 }
1113 } /* Loop for reading multiple physical lines */
1114
1115 /* We now have a logical line. Test for the end of a configuration section (or,
1116 more accurately, for the start of the next section). Place the name of the next
1117 section in next_section, and return NULL. If the name given is longer than
1118 next_section, truncate it. It will be unrecognized later, because all the known
1119 section names do fit. Leave space for pluralizing. */
1120
1121 s = big_buffer + startoffset; /* First non-space character */
1122
1123 if (config_lines)
1124 save_config_line(s);
1125
1126 if (strncmpic(s, US"begin ", 6) == 0)
1127 {
1128 s += 6;
1129 while (isspace(*s)) s++;
1130 if (big_buffer + len - s > sizeof(next_section) - 2)
1131 s[sizeof(next_section) - 2] = 0;
1132 Ustrcpy(next_section, s);
1133 return NULL;
1134 }
1135
1136 /* Return the first non-blank character. */
1137
1138 return s;
1139 }
1140
1141
1142
1143 /*************************************************
1144 * Read a name *
1145 *************************************************/
1146
1147 /* The yield is the pointer to the next uschar. Names longer than the
1148 output space are silently truncated. This function is also used from acl.c when
1149 parsing ACLs.
1150
1151 Arguments:
1152 name where to put the name
1153 len length of name
1154 s input pointer
1155
1156 Returns: new input pointer
1157 */
1158
1159 uschar *
1160 readconf_readname(uschar *name, int len, uschar *s)
1161 {
1162 int p = 0;
1163 while (isspace(*s)) s++;
1164 if (isalpha(*s))
1165 {
1166 while (isalnum(*s) || *s == '_')
1167 {
1168 if (p < len-1) name[p++] = *s;
1169 s++;
1170 }
1171 }
1172 name[p] = 0;
1173 while (isspace(*s)) s++;
1174 return s;
1175 }
1176
1177
1178
1179
1180 /*************************************************
1181 * Read a time value *
1182 *************************************************/
1183
1184 /* This function is also called from outside, to read argument
1185 time values. The format of a time value is:
1186
1187 [<n>w][<n>d][<n>h][<n>m][<n>s]
1188
1189 as long as at least one is present. If a format error is encountered,
1190 return a negative value. The value must be terminated by the given
1191 terminator.
1192
1193 Arguments:
1194 s input pointer
1195 terminator required terminating character
1196 return_msec if TRUE, allow fractional seconds and return milliseconds
1197
1198 Returns: the time value, or -1 on syntax error
1199 value is seconds if return_msec is FALSE
1200 value is milliseconds if return_msec is TRUE
1201 */
1202
1203 int
1204 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1205 {
1206 int yield = 0;
1207 for (;;)
1208 {
1209 int value, count;
1210 double fraction;
1211
1212 if (!isdigit(*s)) return -1;
1213 (void)sscanf(CCS s, "%d%n", &value, &count);
1214 s += count;
1215
1216 switch (*s)
1217 {
1218 case 'w': value *= 7;
1219 case 'd': value *= 24;
1220 case 'h': value *= 60;
1221 case 'm': value *= 60;
1222 case 's': s++;
1223 break;
1224
1225 case '.':
1226 if (!return_msec) return -1;
1227 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1228 s += count;
1229 if (*s++ != 's') return -1;
1230 yield += (int)(fraction * 1000.0);
1231 break;
1232
1233 default: return -1;
1234 }
1235
1236 if (return_msec) value *= 1000;
1237 yield += value;
1238 if (*s == terminator) return yield;
1239 }
1240 /* Control never reaches here. */
1241 }
1242
1243
1244
1245 /*************************************************
1246 * Read a fixed point value *
1247 *************************************************/
1248
1249 /* The value is returned *1000
1250
1251 Arguments:
1252 s input pointer
1253 terminator required terminator
1254
1255 Returns: the value, or -1 on error
1256 */
1257
1258 static int
1259 readconf_readfixed(const uschar *s, int terminator)
1260 {
1261 int yield = 0;
1262 int value, count;
1263 if (!isdigit(*s)) return -1;
1264 (void)sscanf(CS s, "%d%n", &value, &count);
1265 s += count;
1266 yield = value * 1000;
1267 if (*s == '.')
1268 {
1269 int m = 100;
1270 while (isdigit((*(++s))))
1271 {
1272 yield += (*s - '0') * m;
1273 m /= 10;
1274 }
1275 }
1276
1277 return (*s == terminator)? yield : (-1);
1278 }
1279
1280
1281
1282 /*************************************************
1283 * Find option in list *
1284 *************************************************/
1285
1286 /* The lists are always in order, so binary chop can be used.
1287
1288 Arguments:
1289 name the option name to search for
1290 ol the first entry in the option list
1291 last one more than the offset of the last entry in the option list
1292
1293 Returns: pointer to an option entry, or NULL if not found
1294 */
1295
1296 static optionlist *
1297 find_option(uschar *name, optionlist *ol, int last)
1298 {
1299 int first = 0;
1300 while (last > first)
1301 {
1302 int middle = (first + last)/2;
1303 int c = Ustrcmp(name, ol[middle].name);
1304
1305 if (c == 0) return ol + middle;
1306 else if (c > 0) first = middle + 1;
1307 else last = middle;
1308 }
1309 return NULL;
1310 }
1311
1312
1313
1314 /*************************************************
1315 * Find a set flag in option list *
1316 *************************************************/
1317
1318 /* Because some versions of Unix make no restrictions on the values of uids and
1319 gids (even negative ones), we cannot represent "unset" by a special value.
1320 There is therefore a separate boolean variable for each one indicating whether
1321 a value is set or not. This function returns a pointer to the boolean, given
1322 the original option name. It is a major disaster if the flag cannot be found.
1323
1324 Arguments:
1325 name the name of the uid or gid option
1326 oltop points to the start of the relevant option list
1327 last one more than the offset of the last item in the option list
1328 data_block NULL when reading main options => data values in the option
1329 list are absolute addresses; otherwise they are byte offsets
1330 in data_block (used for driver options)
1331
1332 Returns: a pointer to the boolean flag.
1333 */
1334
1335 static BOOL *
1336 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1337 {
1338 optionlist *ol;
1339 uschar name2[64];
1340 sprintf(CS name2, "*set_%.50s", name);
1341 ol = find_option(name2, oltop, last);
1342 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1343 "Exim internal error: missing set flag for %s", name);
1344 return (data_block == NULL)? (BOOL *)(ol->value) :
1345 (BOOL *)(US data_block + (long int)(ol->value));
1346 }
1347
1348
1349
1350
1351 /*************************************************
1352 * Output extra characters message and die *
1353 *************************************************/
1354
1355 /* Called when an option line has junk on the end. Sometimes this is because
1356 the sysadmin thinks comments are permitted.
1357
1358 Arguments:
1359 s points to the extra characters
1360 t1..t3 strings to insert in the log message
1361
1362 Returns: doesn't return; dies
1363 */
1364
1365 static void
1366 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1367 {
1368 uschar *comment = US"";
1369 if (*s == '#') comment = US" (# is comment only at line start)";
1370 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1371 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1372 }
1373
1374
1375
1376 /*************************************************
1377 * Read rewrite information *
1378 *************************************************/
1379
1380 /* Each line of rewrite information contains:
1381
1382 . A complete address in the form user@domain, possibly with
1383 leading * for each part; or alternatively, a regex.
1384
1385 . A replacement string (which will be expanded).
1386
1387 . An optional sequence of one-letter flags, indicating which
1388 headers etc. to apply this rule to.
1389
1390 All this is decoded and placed into a control block. The OR of the flags is
1391 maintained in a common word.
1392
1393 Arguments:
1394 p points to the string that makes up the rule
1395 existflags points to the overall flag word
1396 isglobal TRUE if reading global rewrite rules
1397
1398 Returns: the control block for the parsed rule.
1399 */
1400
1401 static rewrite_rule *
1402 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1403 {
1404 rewrite_rule *next = store_get(sizeof(rewrite_rule), FALSE);
1405
1406 next->next = NULL;
1407 next->key = string_dequote(&p);
1408
1409 while (isspace(*p)) p++;
1410 if (*p == 0)
1411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1412 "missing rewrite replacement string");
1413
1414 next->flags = 0;
1415 next->replacement = string_dequote(&p);
1416
1417 while (*p != 0) switch (*p++)
1418 {
1419 case ' ': case '\t': break;
1420
1421 case 'q': next->flags |= rewrite_quit; break;
1422 case 'w': next->flags |= rewrite_whole; break;
1423
1424 case 'h': next->flags |= rewrite_all_headers; break;
1425 case 's': next->flags |= rewrite_sender; break;
1426 case 'f': next->flags |= rewrite_from; break;
1427 case 't': next->flags |= rewrite_to; break;
1428 case 'c': next->flags |= rewrite_cc; break;
1429 case 'b': next->flags |= rewrite_bcc; break;
1430 case 'r': next->flags |= rewrite_replyto; break;
1431
1432 case 'E': next->flags |= rewrite_all_envelope; break;
1433 case 'F': next->flags |= rewrite_envfrom; break;
1434 case 'T': next->flags |= rewrite_envto; break;
1435
1436 case 'Q': next->flags |= rewrite_qualify; break;
1437 case 'R': next->flags |= rewrite_repeat; break;
1438
1439 case 'S':
1440 next->flags |= rewrite_smtp;
1441 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1442 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1443 "rewrite rule has the S flag but is not a regular expression");
1444 break;
1445
1446 default:
1447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1448 "unknown rewrite flag character '%c' "
1449 "(could be missing quotes round replacement item)", p[-1]);
1450 break;
1451 }
1452
1453 /* If no action flags are set, set all the "normal" rewrites. */
1454
1455 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1456 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1457
1458 /* Remember which exist, for optimization, and return the rule */
1459
1460 *existflags |= next->flags;
1461 return next;
1462 }
1463
1464
1465
1466
1467 /*************************************************
1468 * Read global rewrite information *
1469 *************************************************/
1470
1471 /* Each line is a single rewrite rule; it is parsed into a control block
1472 by readconf_one_rewrite(), and its flags are ORed into the global flag
1473 word rewrite_existflags. */
1474
1475 void
1476 readconf_rewrites(void)
1477 {
1478 rewrite_rule **chain = &global_rewrite_rules;
1479 uschar *p;
1480
1481 while ((p = get_config_line()) != NULL)
1482 {
1483 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1484 *chain = next;
1485 chain = &(next->next);
1486 }
1487 }
1488
1489
1490
1491 /*************************************************
1492 * Read a string *
1493 *************************************************/
1494
1495 /* Strings are read into the normal store pool. As long we aren't too
1496 near the end of the current block, the string will just use what is necessary
1497 on the top of the stacking pool, because string_cat() uses the extension
1498 mechanism.
1499
1500 Argument:
1501 s the rest of the input line
1502 name the option name (for errors)
1503
1504 Returns: pointer to the string
1505 */
1506
1507 static uschar *
1508 read_string(const uschar *s, const uschar *name)
1509 {
1510 uschar *yield;
1511 const uschar *ss;
1512
1513 if (*s != '\"') return string_copy(s);
1514
1515 ss = s;
1516 yield = string_dequote(&s);
1517
1518 if (s == ss+1 || s[-1] != '\"')
1519 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1520 "missing quote at end of string value for %s", name);
1521
1522 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1523
1524 return yield;
1525 }
1526
1527
1528 /*************************************************
1529 * Custom-handler options *
1530 *************************************************/
1531 static void
1532 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1533 {
1534 if (flags & opt_fn_print)
1535 {
1536 if (flags & opt_fn_print_label) printf("%s = ", name);
1537 printf("%s\n", smtp_receive_timeout_s
1538 ? string_printing2(smtp_receive_timeout_s, FALSE)
1539 : readconf_printtime(smtp_receive_timeout));
1540 }
1541 else if (*str == '$')
1542 smtp_receive_timeout_s = string_copy(str);
1543 else
1544 {
1545 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1546 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1547 if (smtp_receive_timeout < 0)
1548 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1549 name);
1550 }
1551 }
1552
1553 /*************************************************
1554 * Handle option line *
1555 *************************************************/
1556
1557 /* This function is called from several places to process a line containing the
1558 setting of an option. The first argument is the line to be decoded; it has been
1559 checked not to be empty and not to start with '#'. Trailing newlines and white
1560 space have been removed. The second argument is a pointer to the list of
1561 variable names that are to be recognized, together with their types and
1562 locations, and the third argument gives the number of entries in the list.
1563
1564 The fourth argument is a pointer to a data block. If it is NULL, then the data
1565 values in the options list are absolute addresses. Otherwise, they are byte
1566 offsets in the data block.
1567
1568 String option data may continue onto several lines; this function reads further
1569 data from config_file if necessary.
1570
1571 The yield of this function is normally zero. If a string continues onto
1572 multiple lines, then the data value is permitted to be followed by a comma
1573 or a semicolon (for use in drivers) and the yield is that character.
1574
1575 Arguments:
1576 buffer contains the configuration line to be handled
1577 oltop points to the start of the relevant option list
1578 last one more than the offset of the last item in the option list
1579 data_block NULL when reading main options => data values in the option
1580 list are absolute addresses; otherwise they are byte offsets
1581 in data_block when they have opt_public set; otherwise
1582 they are byte offsets in data_block->options_block.
1583 unknown_txt format string to use in panic message for unknown option;
1584 must contain %s for option name
1585 if given as NULL, don't panic on unknown option
1586
1587 Returns: TRUE if an option was read successfully,
1588 FALSE false for an unknown option if unknown_txt == NULL,
1589 otherwise panic and die on an unknown option
1590 */
1591
1592 static BOOL
1593 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1594 void *data_block, uschar *unknown_txt)
1595 {
1596 int ptr = 0;
1597 int offset = 0;
1598 int count, type, value;
1599 int issecure = 0;
1600 uid_t uid;
1601 gid_t gid;
1602 BOOL boolvalue = TRUE;
1603 BOOL freesptr = TRUE;
1604 optionlist *ol, *ol2;
1605 struct passwd *pw;
1606 rmark reset_point;
1607 int intbase = 0;
1608 uschar *inttype = US"";
1609 uschar *sptr;
1610 uschar *s = buffer;
1611 uschar **str_target;
1612 uschar name[64];
1613 uschar name2[64];
1614
1615 /* There may be leading spaces; thereafter, we expect an option name starting
1616 with a letter. */
1617
1618 while (isspace(*s)) s++;
1619 if (!isalpha(*s))
1620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1621
1622 /* Read the name of the option, and skip any subsequent white space. If
1623 it turns out that what we read was "hide", set the flag indicating that
1624 this is a secure option, and loop to read the next word. */
1625
1626 for (int n = 0; n < 2; n++)
1627 {
1628 while (isalnum(*s) || *s == '_')
1629 {
1630 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1631 s++;
1632 }
1633 name[ptr] = 0;
1634 while (isspace(*s)) s++;
1635 if (Ustrcmp(name, "hide") != 0) break;
1636 issecure = opt_secure;
1637 ptr = 0;
1638 }
1639
1640 /* Deal with "no_" or "not_" here for booleans */
1641
1642 if (Ustrncmp(name, "no_", 3) == 0)
1643 {
1644 boolvalue = FALSE;
1645 offset = 3;
1646 }
1647
1648 if (Ustrncmp(name, "not_", 4) == 0)
1649 {
1650 boolvalue = FALSE;
1651 offset = 4;
1652 }
1653
1654 /* Search the list for the given name. A non-existent name, or an option that
1655 is set twice, is a disaster. */
1656
1657 if (!(ol = find_option(name + offset, oltop, last)))
1658 {
1659 if (unknown_txt == NULL) return FALSE;
1660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1661 }
1662
1663 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1664 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1665 "\"%s\" option set for the second time", name);
1666
1667 ol->type |= opt_set | issecure;
1668 type = ol->type & opt_mask;
1669
1670 /* Types with data values must be followed by '='; the "no[t]_" prefix
1671 applies only to boolean values. */
1672
1673 if (type < opt_bool || type > opt_bool_last)
1674 {
1675 if (offset != 0)
1676 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1677 "negation prefix applied to a non-boolean option");
1678 if (*s == 0)
1679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1680 "unexpected end of line (data missing) after %s", name);
1681 if (*s != '=')
1682 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1683 }
1684
1685 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1686 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1687 ultimately expands to one of those values. */
1688
1689 else if (*s != 0 && (offset != 0 || *s != '='))
1690 extra_chars_error(s, US"boolean option ", name, US"");
1691
1692 /* Skip white space after = */
1693
1694 if (*s == '=') while (isspace((*(++s))));
1695
1696 /* If there is a data block and the opt_public flag is not set, change
1697 the data block pointer to the private options block. */
1698
1699 if (data_block != NULL && (ol->type & opt_public) == 0)
1700 data_block = (void *)(((driver_instance *)data_block)->options_block);
1701
1702 /* Now get the data according to the type. */
1703
1704 switch (type)
1705 {
1706 /* If a string value is not enclosed in quotes, it consists of
1707 the rest of the current line, verbatim. Otherwise, string escapes
1708 are processed.
1709
1710 A transport is specified as a string, which is then looked up in the
1711 list of transports. A search type is specified as one of a number of
1712 known strings.
1713
1714 A set or rewrite rules for a driver is specified as a string, which is
1715 then parsed into a suitable chain of control blocks.
1716
1717 Uids and gids are specified as strings which are then looked up in the
1718 passwd file. Lists of uids and gids are similarly specified as colon-
1719 separated strings. */
1720
1721 case opt_stringptr:
1722 case opt_uid:
1723 case opt_gid:
1724 case opt_expand_uid:
1725 case opt_expand_gid:
1726 case opt_uidlist:
1727 case opt_gidlist:
1728 case opt_rewrite:
1729
1730 reset_point = store_mark();
1731 sptr = read_string(s, name);
1732
1733 /* Having read a string, we now have several different ways of using it,
1734 depending on the data type, so do another switch. If keeping the actual
1735 string is not required (because it is interpreted), freesptr is set TRUE,
1736 and at the end we reset the pool. */
1737
1738 switch (type)
1739 {
1740 /* If this was a string, set the variable to point to the new string,
1741 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1742 rules, we still keep the string (for printing), and parse the rules into a
1743 control block and flags word. */
1744
1745 case opt_stringptr:
1746 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1747 : USS (ol->value);
1748 if (ol->type & opt_rep_con)
1749 {
1750 uschar * saved_condition;
1751 /* We already have a condition, we're conducting a crude hack to let
1752 multiple condition rules be chained together, despite storing them in
1753 text form. */
1754 *str_target = string_copy_perm( (saved_condition = *str_target)
1755 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1756 saved_condition, sptr)
1757 : sptr,
1758 FALSE);
1759 /* TODO(pdp): there is a memory leak here and just below
1760 when we set 3 or more conditions; I still don't
1761 understand the store mechanism enough to know
1762 what's the safe way to free content from an earlier store.
1763 AFAICT, stores stack, so freeing an early stored item also stores
1764 all data alloc'd after it. If we knew conditions were adjacent,
1765 we could survive that, but we don't. So I *think* we need to take
1766 another bit from opt_type to indicate "malloced"; this seems like
1767 quite a hack, especially for this one case. It also means that
1768 we can't ever reclaim the store from the *first* condition.
1769
1770 Because we only do this once, near process start-up, I'm prepared to
1771 let this slide for the time being, even though it rankles. */
1772 }
1773 else if (ol->type & opt_rep_str)
1774 {
1775 uschar sep_o =
1776 Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
1777 : Ustrncmp(name, "set", 3) == 0 ? ';'
1778 : ':';
1779 int sep_i = -(int)sep_o;
1780 const uschar * list = sptr;
1781 uschar * s;
1782 gstring * list_o = NULL;
1783
1784 if (*str_target)
1785 {
1786 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1787 list_o = string_cat(list_o, *str_target);
1788 }
1789
1790 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1791 list_o = string_append_listele(list_o, sep_o, s);
1792
1793 if (list_o)
1794 *str_target = string_copy_perm(string_from_gstring(list_o), FALSE);
1795 }
1796 else
1797 {
1798 *str_target = sptr;
1799 freesptr = FALSE;
1800 }
1801 break;
1802
1803 case opt_rewrite:
1804 if (data_block)
1805 *USS (US data_block + (long int)(ol->value)) = sptr;
1806 else
1807 *USS (ol->value) = sptr;
1808 freesptr = FALSE;
1809 if (type == opt_rewrite)
1810 {
1811 int sep = 0;
1812 int *flagptr;
1813 uschar *p = sptr;
1814 rewrite_rule **chain;
1815 optionlist *ol3;
1816
1817 sprintf(CS name2, "*%.50s_rules", name);
1818 ol2 = find_option(name2, oltop, last);
1819 sprintf(CS name2, "*%.50s_flags", name);
1820 ol3 = find_option(name2, oltop, last);
1821
1822 if (ol2 == NULL || ol3 == NULL)
1823 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1824 "rewrite rules not available for driver");
1825
1826 if (data_block == NULL)
1827 {
1828 chain = (rewrite_rule **)(ol2->value);
1829 flagptr = (int *)(ol3->value);
1830 }
1831 else
1832 {
1833 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1834 flagptr = (int *)(US data_block + (long int)(ol3->value));
1835 }
1836
1837 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1838 {
1839 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1840 *chain = next;
1841 chain = &(next->next);
1842 }
1843
1844 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1845 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1846 "non-header rewrite - not allowed at transport time -");
1847 }
1848 break;
1849
1850 /* If it was an expanded uid, see if there is any expansion to be
1851 done by checking for the presence of a $ character. If there is, save it
1852 in the corresponding *expand_user option field. Otherwise, fall through
1853 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1854 of data. */
1855
1856 case opt_expand_uid:
1857 sprintf(CS name2, "*expand_%.50s", name);
1858 ol2 = find_option(name2, oltop, last);
1859 if (ol2 != NULL)
1860 {
1861 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1862
1863 if (data_block == NULL)
1864 *((uschar **)(ol2->value)) = ss;
1865 else
1866 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1867
1868 if (ss != NULL)
1869 {
1870 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1871 freesptr = FALSE;
1872 break;
1873 }
1874 }
1875
1876 /* Look up a fixed uid, and also make use of the corresponding gid
1877 if a passwd entry is returned and the gid has not been set. */
1878
1879 case opt_uid:
1880 if (!route_finduser(sptr, &pw, &uid))
1881 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1882 if (data_block == NULL)
1883 *((uid_t *)(ol->value)) = uid;
1884 else
1885 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1886
1887 /* Set the flag indicating a fixed value is set */
1888
1889 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1890
1891 /* Handle matching gid if we have a passwd entry: done by finding the
1892 same name with terminating "user" changed to "group"; if not found,
1893 ignore. Also ignore if the value is already set. */
1894
1895 if (pw == NULL) break;
1896 Ustrcpy(name+Ustrlen(name)-4, US"group");
1897 ol2 = find_option(name, oltop, last);
1898 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1899 (ol2->type & opt_mask) == opt_expand_gid))
1900 {
1901 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1902 if (! *set_flag)
1903 {
1904 if (data_block == NULL)
1905 *((gid_t *)(ol2->value)) = pw->pw_gid;
1906 else
1907 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1908 *set_flag = TRUE;
1909 }
1910 }
1911 break;
1912
1913 /* If it was an expanded gid, see if there is any expansion to be
1914 done by checking for the presence of a $ character. If there is, save it
1915 in the corresponding *expand_user option field. Otherwise, fall through
1916 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1917 of data. */
1918
1919 case opt_expand_gid:
1920 sprintf(CS name2, "*expand_%.50s", name);
1921 ol2 = find_option(name2, oltop, last);
1922 if (ol2 != NULL)
1923 {
1924 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1925
1926 if (data_block == NULL)
1927 *((uschar **)(ol2->value)) = ss;
1928 else
1929 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1930
1931 if (ss != NULL)
1932 {
1933 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1934 freesptr = FALSE;
1935 break;
1936 }
1937 }
1938
1939 /* Handle freestanding gid */
1940
1941 case opt_gid:
1942 if (!route_findgroup(sptr, &gid))
1943 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1944 if (data_block == NULL)
1945 *((gid_t *)(ol->value)) = gid;
1946 else
1947 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1948 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1949 break;
1950
1951 /* If it was a uid list, look up each individual entry, and build
1952 a vector of uids, with a count in the first element. Put the vector
1953 in malloc store so we can free the string. (We are reading into
1954 permanent store already.) */
1955
1956 case opt_uidlist:
1957 {
1958 int count = 1;
1959 uid_t *list;
1960 int ptr = 0;
1961 const uschar *p;
1962 const uschar *op = expand_string (sptr);
1963
1964 if (op == NULL)
1965 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1966 name, expand_string_message);
1967
1968 p = op;
1969 if (*p != 0) count++;
1970 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1971 list = store_malloc(count*sizeof(uid_t));
1972 list[ptr++] = (uid_t)(count - 1);
1973
1974 if (data_block == NULL)
1975 *((uid_t **)(ol->value)) = list;
1976 else
1977 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1978
1979 p = op;
1980 while (count-- > 1)
1981 {
1982 int sep = 0;
1983 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1984 if (!route_finduser(big_buffer, NULL, &uid))
1985 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1986 big_buffer);
1987 list[ptr++] = uid;
1988 }
1989 }
1990 break;
1991
1992 /* If it was a gid list, look up each individual entry, and build
1993 a vector of gids, with a count in the first element. Put the vector
1994 in malloc store so we can free the string. (We are reading into permanent
1995 store already.) */
1996
1997 case opt_gidlist:
1998 {
1999 int count = 1;
2000 gid_t *list;
2001 int ptr = 0;
2002 const uschar *p;
2003 const uschar *op = expand_string (sptr);
2004
2005 if (op == NULL)
2006 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2007 name, expand_string_message);
2008
2009 p = op;
2010 if (*p != 0) count++;
2011 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2012 list = store_malloc(count*sizeof(gid_t));
2013 list[ptr++] = (gid_t)(count - 1);
2014
2015 if (data_block == NULL)
2016 *((gid_t **)(ol->value)) = list;
2017 else
2018 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2019
2020 p = op;
2021 while (count-- > 1)
2022 {
2023 int sep = 0;
2024 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2025 if (!route_findgroup(big_buffer, &gid))
2026 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2027 big_buffer);
2028 list[ptr++] = gid;
2029 }
2030 }
2031 break;
2032 }
2033
2034 /* Release store if the value of the string doesn't need to be kept. */
2035
2036 if (freesptr) reset_point = store_reset(reset_point);
2037 break;
2038
2039 /* Expanded boolean: if no characters follow, or if there are no dollar
2040 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2041 save the string for later expansion in the alternate place. */
2042
2043 case opt_expand_bool:
2044 if (*s != 0 && Ustrchr(s, '$') != 0)
2045 {
2046 sprintf(CS name2, "*expand_%.50s", name);
2047 if ((ol2 = find_option(name2, oltop, last)))
2048 {
2049 reset_point = store_mark();
2050 sptr = read_string(s, name);
2051 if (data_block == NULL)
2052 *((uschar **)(ol2->value)) = sptr;
2053 else
2054 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2055 freesptr = FALSE;
2056 break;
2057 }
2058 }
2059 /* Fall through */
2060
2061 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2062 look for yes/not/true/false. Some booleans are stored in a single bit in
2063 a single int. There's a special fudge for verify settings; without a suffix
2064 they set both xx_sender and xx_recipient. The table points to the sender
2065 value; search subsequently for the recipient. There's another special case:
2066 opt_bool_set also notes when a boolean has been set. */
2067
2068 case opt_bool:
2069 case opt_bit:
2070 case opt_bool_verify:
2071 case opt_bool_set:
2072 if (*s != 0)
2073 {
2074 s = readconf_readname(name2, 64, s);
2075 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2076 boolvalue = TRUE;
2077 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2078 boolvalue = FALSE;
2079 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2080 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2081 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2082 US"for boolean option ", name);
2083 }
2084
2085 /* Handle single-bit type. */
2086
2087 if (type == opt_bit)
2088 {
2089 int bit = 1 << ((ol->type >> 16) & 31);
2090 int *ptr = (data_block == NULL)?
2091 (int *)(ol->value) :
2092 (int *)(US data_block + (long int)ol->value);
2093 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2094 break;
2095 }
2096
2097 /* Handle full BOOL types */
2098
2099 if (data_block == NULL)
2100 *((BOOL *)(ol->value)) = boolvalue;
2101 else
2102 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2103
2104 /* Verify fudge */
2105
2106 if (type == opt_bool_verify)
2107 {
2108 sprintf(CS name2, "%.50s_recipient", name + offset);
2109 ol2 = find_option(name2, oltop, last);
2110 if (ol2 != NULL)
2111 {
2112 if (data_block == NULL)
2113 *((BOOL *)(ol2->value)) = boolvalue;
2114 else
2115 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2116 }
2117 }
2118
2119 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2120
2121 else if (type == opt_bool_set)
2122 {
2123 sprintf(CS name2, "*set_%.50s", name + offset);
2124 ol2 = find_option(name2, oltop, last);
2125 if (ol2 != NULL)
2126 {
2127 if (data_block == NULL)
2128 *((BOOL *)(ol2->value)) = TRUE;
2129 else
2130 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2131 }
2132 }
2133 break;
2134
2135 /* Octal integer */
2136
2137 case opt_octint:
2138 intbase = 8;
2139 inttype = US"octal ";
2140
2141 /* Integer: a simple(ish) case; allow octal and hex formats, and
2142 suffixes K, M, G, and T. The different types affect output, not input. */
2143
2144 case opt_mkint:
2145 case opt_int:
2146 {
2147 uschar *endptr;
2148 long int lvalue;
2149
2150 errno = 0;
2151 lvalue = strtol(CS s, CSS &endptr, intbase);
2152
2153 if (endptr == s)
2154 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2155 inttype, name);
2156
2157 if (errno != ERANGE && *endptr)
2158 {
2159 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2160
2161 if ((mp = Ustrchr(mp, *endptr)))
2162 {
2163 endptr++;
2164 do
2165 {
2166 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2167 {
2168 errno = ERANGE;
2169 break;
2170 }
2171 lvalue *= 1024;
2172 }
2173 while (*(mp += 2));
2174 }
2175 }
2176
2177 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2178 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2179 "absolute value of integer \"%s\" is too large (overflow)", s);
2180
2181 while (isspace(*endptr)) endptr++;
2182 if (*endptr)
2183 extra_chars_error(endptr, inttype, US"integer value for ", name);
2184
2185 value = (int)lvalue;
2186 }
2187
2188 if (data_block)
2189 *(int *)(US data_block + (long int)ol->value) = value;
2190 else
2191 *(int *)ol->value = value;
2192 break;
2193
2194 /* Integer held in K: again, allow formats and suffixes as above. */
2195
2196 case opt_Kint:
2197 {
2198 uschar *endptr;
2199 errno = 0;
2200 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2201
2202 if (endptr == s)
2203 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2204 inttype, name);
2205
2206 if (errno != ERANGE && *endptr)
2207 {
2208 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2209
2210 if ((mp = Ustrchr(mp, *endptr)))
2211 {
2212 endptr++;
2213 while (*(mp += 2))
2214 {
2215 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2216 {
2217 errno = ERANGE;
2218 break;
2219 }
2220 lvalue *= 1024;
2221 }
2222 }
2223 else
2224 lvalue = (lvalue + 512)/1024;
2225 }
2226
2227 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2228 "absolute value of integer \"%s\" is too large (overflow)", s);
2229
2230 while (isspace(*endptr)) endptr++;
2231 if (*endptr != 0)
2232 extra_chars_error(endptr, inttype, US"integer value for ", name);
2233
2234 if (data_block)
2235 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2236 else
2237 *(int_eximarith_t *)ol->value = lvalue;
2238 break;
2239 }
2240
2241 /* Fixed-point number: held to 3 decimal places. */
2242
2243 case opt_fixed:
2244 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2245 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2246 "fixed-point number expected for %s", name);
2247
2248 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2249 "integer \"%s\" is too large (overflow)", s);
2250
2251 value *= 1000;
2252
2253 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2254 "integer \"%s\" is too large (overflow)", s);
2255
2256 /* We get a coverity error here for using count, as it derived
2257 from the tainted buffer pointed to by s, as parsed by sscanf().
2258 By the definition of sscanf we must be accessing between start
2259 and end of s (assuming it is nul-terminated...) so ignore the error. */
2260 /* coverity[tainted_data] */
2261 if (s[count] == '.')
2262 {
2263 int d = 100;
2264 while (isdigit(s[++count]))
2265 {
2266 value += (s[count] - '0') * d;
2267 d /= 10;
2268 }
2269 }
2270
2271 while (isspace(s[count])) count++;
2272
2273 if (s[count] != 0)
2274 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2275
2276 if (data_block == NULL)
2277 *((int *)(ol->value)) = value;
2278 else
2279 *((int *)(US data_block + (long int)(ol->value))) = value;
2280 break;
2281
2282 /* There's a special routine to read time values. */
2283
2284 case opt_time:
2285 value = readconf_readtime(s, 0, FALSE);
2286 if (value < 0)
2287 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2288 name);
2289 if (data_block == NULL)
2290 *((int *)(ol->value)) = value;
2291 else
2292 *((int *)(US data_block + (long int)(ol->value))) = value;
2293 break;
2294
2295 /* A time list is a list of colon-separated times, with the first
2296 element holding the size of the list and the second the number of
2297 entries used. */
2298
2299 case opt_timelist:
2300 {
2301 int count = 0;
2302 int *list = (data_block == NULL)?
2303 (int *)(ol->value) :
2304 (int *)(US data_block + (long int)(ol->value));
2305
2306 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2307 {
2308 int terminator = 0;
2309 uschar *snext = Ustrchr(s, ':');
2310 if (snext != NULL)
2311 {
2312 uschar *ss = snext;
2313 while (ss > s && isspace(ss[-1])) ss--;
2314 terminator = *ss;
2315 }
2316 value = readconf_readtime(s, terminator, FALSE);
2317 if (value < 0)
2318 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2319 name);
2320 if (count > 1 && value <= list[count])
2321 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2322 "time value out of order for %s", name);
2323 list[count+1] = value;
2324 if (snext == NULL) break;
2325 s = snext + 1;
2326 while (isspace(*s)) s++;
2327 }
2328
2329 if (count > list[0] - 2)
2330 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2331 name);
2332 if (count > 0 && list[2] == 0) count = 0;
2333 list[1] = count;
2334 break;
2335 }
2336
2337 case opt_func:
2338 {
2339 void (*fn)() = ol->value;
2340 fn(name, s, 0);
2341 break;
2342 }
2343 }
2344
2345 return TRUE;
2346 }
2347
2348
2349
2350 /*************************************************
2351 * Print a time value *
2352 *************************************************/
2353
2354 /*
2355 Argument: a time value in seconds
2356 Returns: pointer to a fixed buffer containing the time as a string,
2357 in readconf_readtime() format
2358 */
2359
2360 uschar *
2361 readconf_printtime(int t)
2362 {
2363 int s, m, h, d, w;
2364 uschar *p = time_buffer;
2365
2366 if (t < 0)
2367 {
2368 *p++ = '-';
2369 t = -t;
2370 }
2371
2372 s = t % 60;
2373 t /= 60;
2374 m = t % 60;
2375 t /= 60;
2376 h = t % 24;
2377 t /= 24;
2378 d = t % 7;
2379 w = t/7;
2380
2381 if (w > 0) p += sprintf(CS p, "%dw", w);
2382 if (d > 0) p += sprintf(CS p, "%dd", d);
2383 if (h > 0) p += sprintf(CS p, "%dh", h);
2384 if (m > 0) p += sprintf(CS p, "%dm", m);
2385 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2386
2387 return time_buffer;
2388 }
2389
2390
2391
2392 /*************************************************
2393 * Print an individual option value *
2394 *************************************************/
2395
2396 /* This is used by the -bP option, so prints to the standard output.
2397 The entire options list is passed in as an argument, because some options come
2398 in pairs - typically uid/gid settings, which can either be explicit numerical
2399 values, or strings to be expanded later. If the numerical value is unset,
2400 search for "*expand_<name>" to see if there is a string equivalent.
2401
2402 Arguments:
2403 ol option entry, or NULL for an unknown option
2404 name option name
2405 options_block NULL for main configuration options; otherwise points to
2406 a driver block; if the option doesn't have opt_public
2407 set, then options_block->options_block is where the item
2408 resides.
2409 oltop points to the option list in which ol exists
2410 last one more than the offset of the last entry in optop
2411 no_labels do not show "foo = " at the start.
2412
2413 Returns: boolean success
2414 */
2415
2416 static BOOL
2417 print_ol(optionlist *ol, uschar *name, void *options_block,
2418 optionlist *oltop, int last, BOOL no_labels)
2419 {
2420 struct passwd *pw;
2421 struct group *gr;
2422 optionlist *ol2;
2423 void *value;
2424 uid_t *uidlist;
2425 gid_t *gidlist;
2426 uschar *s;
2427 uschar name2[64];
2428
2429 if (!ol)
2430 {
2431 printf("%s is not a known option\n", name);
2432 return FALSE;
2433 }
2434
2435 /* Non-admin callers cannot see options that have been flagged secure by the
2436 "hide" prefix. */
2437
2438 if (!f.admin_user && ol->type & opt_secure)
2439 {
2440 if (no_labels)
2441 printf("%s\n", hidden);
2442 else
2443 printf("%s = %s\n", name, hidden);
2444 return TRUE;
2445 }
2446
2447 /* Else show the value of the option */
2448
2449 value = ol->value;
2450 if (options_block)
2451 {
2452 if (!(ol->type & opt_public))
2453 options_block = (void *)(((driver_instance *)options_block)->options_block);
2454 value = (void *)(US options_block + (long int)value);
2455 }
2456
2457 switch(ol->type & opt_mask)
2458 {
2459 case opt_stringptr:
2460 case opt_rewrite: /* Show the text value */
2461 s = *(USS value);
2462 if (!no_labels) printf("%s = ", name);
2463 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2464 break;
2465
2466 case opt_int:
2467 if (!no_labels) printf("%s = ", name);
2468 printf("%d\n", *((int *)value));
2469 break;
2470
2471 case opt_mkint:
2472 {
2473 int x = *((int *)value);
2474 if (x != 0 && (x & 1023) == 0)
2475 {
2476 int c = 'K';
2477 x >>= 10;
2478 if ((x & 1023) == 0)
2479 {
2480 c = 'M';
2481 x >>= 10;
2482 }
2483 if (!no_labels) printf("%s = ", name);
2484 printf("%d%c\n", x, c);
2485 }
2486 else
2487 {
2488 if (!no_labels) printf("%s = ", name);
2489 printf("%d\n", x);
2490 }
2491 }
2492 break;
2493
2494 case opt_Kint:
2495 {
2496 int_eximarith_t x = *((int_eximarith_t *)value);
2497 if (!no_labels) printf("%s = ", name);
2498 if (x == 0) printf("0\n");
2499 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2500 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2501 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2502 else printf(PR_EXIM_ARITH "K\n", x);
2503 }
2504 break;
2505
2506 case opt_octint:
2507 if (!no_labels) printf("%s = ", name);
2508 printf("%#o\n", *((int *)value));
2509 break;
2510
2511 /* Can be negative only when "unset", in which case integer */
2512
2513 case opt_fixed:
2514 {
2515 int x = *((int *)value);
2516 int f = x % 1000;
2517 int d = 100;
2518 if (x < 0) printf("%s =\n", name); else
2519 {
2520 if (!no_labels) printf("%s = ", name);
2521 printf("%d.", x/1000);
2522 do
2523 {
2524 printf("%d", f/d);
2525 f %= d;
2526 d /= 10;
2527 }
2528 while (f != 0);
2529 printf("\n");
2530 }
2531 }
2532 break;
2533
2534 /* If the numerical value is unset, try for the string value */
2535
2536 case opt_expand_uid:
2537 if (! *get_set_flag(name, oltop, last, options_block))
2538 {
2539 sprintf(CS name2, "*expand_%.50s", name);
2540 if ((ol2 = find_option(name2, oltop, last)))
2541 {
2542 void *value2 = ol2->value;
2543 if (options_block)
2544 value2 = (void *)(US options_block + (long int)value2);
2545 s = *(USS value2);
2546 if (!no_labels) printf("%s = ", name);
2547 printf("%s\n", s ? string_printing(s) : US"");
2548 break;
2549 }
2550 }
2551
2552 /* Else fall through */
2553
2554 case opt_uid:
2555 if (!no_labels) printf("%s = ", name);
2556 if (! *get_set_flag(name, oltop, last, options_block))
2557 printf("\n");
2558 else
2559 if ((pw = getpwuid(*((uid_t *)value))))
2560 printf("%s\n", pw->pw_name);
2561 else
2562 printf("%ld\n", (long int)(*((uid_t *)value)));
2563 break;
2564
2565 /* If the numerical value is unset, try for the string value */
2566
2567 case opt_expand_gid:
2568 if (! *get_set_flag(name, oltop, last, options_block))
2569 {
2570 sprintf(CS name2, "*expand_%.50s", name);
2571 if ( (ol2 = find_option(name2, oltop, last))
2572 && (ol2->type & opt_mask) == opt_stringptr)
2573 {
2574 void *value2 = ol2->value;
2575 if (options_block)
2576 value2 = (void *)(US options_block + (long int)value2);
2577 s = *(USS value2);
2578 if (!no_labels) printf("%s = ", name);
2579 printf("%s\n", s ? string_printing(s) : US"");
2580 break;
2581 }
2582 }
2583
2584 /* Else fall through */
2585
2586 case opt_gid:
2587 if (!no_labels) printf("%s = ", name);
2588 if (! *get_set_flag(name, oltop, last, options_block))
2589 printf("\n");
2590 else
2591 if ((gr = getgrgid(*((int *)value))))
2592 printf("%s\n", gr->gr_name);
2593 else
2594 printf("%ld\n", (long int)(*((int *)value)));
2595 break;
2596
2597 case opt_uidlist:
2598 uidlist = *((uid_t **)value);
2599 if (!no_labels) printf("%s =", name);
2600 if (uidlist)
2601 {
2602 uschar sep = no_labels ? '\0' : ' ';
2603 for (int i = 1; i <= (int)(uidlist[0]); i++)
2604 {
2605 uschar *name = NULL;
2606 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2607 if (sep != '\0') printf("%c", sep);
2608 if (name) printf("%s", name);
2609 else printf("%ld", (long int)(uidlist[i]));
2610 sep = ':';
2611 }
2612 }
2613 printf("\n");
2614 break;
2615
2616 case opt_gidlist:
2617 gidlist = *((gid_t **)value);
2618 if (!no_labels) printf("%s =", name);
2619 if (gidlist)
2620 {
2621 uschar sep = no_labels ? '\0' : ' ';
2622 for (int i = 1; i <= (int)(gidlist[0]); i++)
2623 {
2624 uschar *name = NULL;
2625 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2626 if (sep != '\0') printf("%c", sep);
2627 if (name) printf("%s", name);
2628 else printf("%ld", (long int)(gidlist[i]));
2629 sep = ':';
2630 }
2631 }
2632 printf("\n");
2633 break;
2634
2635 case opt_time:
2636 if (!no_labels) printf("%s = ", name);
2637 printf("%s\n", readconf_printtime(*((int *)value)));
2638 break;
2639
2640 case opt_timelist:
2641 {
2642 int *list = (int *)value;
2643 if (!no_labels) printf("%s = ", name);
2644 for (int i = 0; i < list[1]; i++)
2645 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2646 printf("\n");
2647 }
2648 break;
2649
2650 case opt_bit:
2651 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2652 "" : "no_", name);
2653 break;
2654
2655 case opt_expand_bool:
2656 sprintf(CS name2, "*expand_%.50s", name);
2657 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2658 {
2659 void *value2 = ol2->value;
2660 if (options_block)
2661 value2 = (void *)(US options_block + (long int)value2);
2662 s = *(USS value2);
2663 if (s)
2664 {
2665 if (!no_labels) printf("%s = ", name);
2666 printf("%s\n", string_printing(s));
2667 break;
2668 }
2669 /* s == NULL => string not set; fall through */
2670 }
2671
2672 /* Fall through */
2673
2674 case opt_bool:
2675 case opt_bool_verify:
2676 case opt_bool_set:
2677 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2678 break;
2679
2680 case opt_func:
2681 {
2682 void (*fn)() = ol->value;
2683 fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2684 break;
2685 }
2686 }
2687 return TRUE;
2688 }
2689
2690
2691
2692 /*************************************************
2693 * Print value from main configuration *
2694 *************************************************/
2695
2696 /* This function, called as a result of encountering the -bP option,
2697 causes the value of any main configuration variable to be output if the
2698 second argument is NULL. There are some special values:
2699
2700 all print all main configuration options
2701 config_file print the name of the configuration file
2702 (configure_file will still work, for backward
2703 compatibility)
2704 routers print the routers' configurations
2705 transports print the transports' configuration
2706 authenticators print the authenticators' configuration
2707 macros print the macros' configuration
2708 router_list print a list of router names
2709 transport_list print a list of transport names
2710 authenticator_list print a list of authentication mechanism names
2711 macro_list print a list of macro names
2712 +name print a named list item
2713 local_scan print the local_scan options
2714 config print the configuration as it is parsed
2715 environment print the used execution environment
2716
2717 If the second argument is not NULL, it must be one of "router", "transport",
2718 "authenticator" or "macro" in which case the first argument identifies the
2719 driver whose options are to be printed.
2720
2721 Arguments:
2722 name option name if type == NULL; else driver name
2723 type NULL or driver type name, as described above
2724 no_labels avoid the "foo = " at the start of an item
2725
2726 Returns: Boolean success
2727 */
2728
2729 BOOL
2730 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2731 {
2732 BOOL names_only = FALSE;
2733 optionlist *ol2 = NULL;
2734 driver_instance *d = NULL;
2735 int size = 0;
2736
2737 if (!type)
2738 {
2739 if (*name == '+')
2740 {
2741 tree_node *t;
2742 BOOL found = FALSE;
2743 static uschar *types[] = { US"address", US"domain", US"host",
2744 US"localpart" };
2745 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2746 &hostlist_anchor, &localpartlist_anchor };
2747
2748 for (int i = 0; i < 4; i++)
2749 if ((t = tree_search(*(anchors[i]), name+1)))
2750 {
2751 found = TRUE;
2752 if (no_labels)
2753 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2754 else
2755 printf("%slist %s = %s\n", types[i], name+1,
2756 ((namedlist_block *)(t->data.ptr))->string);
2757 }
2758
2759 if (!found)
2760 printf("no address, domain, host, or local part list called \"%s\" "
2761 "exists\n", name+1);
2762
2763 return found;
2764 }
2765
2766 if ( Ustrcmp(name, "configure_file") == 0
2767 || Ustrcmp(name, "config_file") == 0)
2768 {
2769 printf("%s\n", CS config_main_filename);
2770 return TRUE;
2771 }
2772
2773 if (Ustrcmp(name, "all") == 0)
2774 {
2775 for (optionlist * ol = optionlist_config;
2776 ol < optionlist_config + nelem(optionlist_config); ol++)
2777 if (!(ol->type & opt_hidden))
2778 (void) print_ol(ol, US ol->name, NULL,
2779 optionlist_config, nelem(optionlist_config),
2780 no_labels);
2781 return TRUE;
2782 }
2783
2784 if (Ustrcmp(name, "local_scan") == 0)
2785 {
2786 #ifndef LOCAL_SCAN_HAS_OPTIONS
2787 printf("local_scan() options are not supported\n");
2788 return FALSE;
2789 #else
2790 for (optionlist * ol = local_scan_options;
2791 ol < local_scan_options + local_scan_options_count; ol++)
2792 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2793 local_scan_options_count, no_labels);
2794 return TRUE;
2795 #endif
2796 }
2797
2798 if (Ustrcmp(name, "config") == 0)
2799 {
2800 print_config(f.admin_user, no_labels);
2801 return TRUE;
2802 }
2803
2804 if (Ustrcmp(name, "routers") == 0)
2805 {
2806 type = US"router";
2807 name = NULL;
2808 }
2809 else if (Ustrcmp(name, "transports") == 0)
2810 {
2811 type = US"transport";
2812 name = NULL;
2813 }
2814 else if (Ustrcmp(name, "authenticators") == 0)
2815 {
2816 type = US"authenticator";
2817 name = NULL;
2818 }
2819 else if (Ustrcmp(name, "macros") == 0)
2820 {
2821 type = US"macro";
2822 name = NULL;
2823 }
2824 else if (Ustrcmp(name, "router_list") == 0)
2825 {
2826 type = US"router";
2827 name = NULL;
2828 names_only = TRUE;
2829 }
2830 else if (Ustrcmp(name, "transport_list") == 0)
2831 {
2832 type = US"transport";
2833 name = NULL;
2834 names_only = TRUE;
2835 }
2836 else if (Ustrcmp(name, "authenticator_list") == 0)
2837 {
2838 type = US"authenticator";
2839 name = NULL;
2840 names_only = TRUE;
2841 }
2842 else if (Ustrcmp(name, "macro_list") == 0)
2843 {
2844 type = US"macro";
2845 name = NULL;
2846 names_only = TRUE;
2847 }
2848 else if (Ustrcmp(name, "environment") == 0)
2849 {
2850 if (environ)
2851 {
2852 uschar ** p;
2853 for (p = USS environ; *p; p++) ;
2854 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2855
2856 for (p = USS environ; *p; p++)
2857 {
2858 uschar * q;
2859 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2860 puts(CS *p);
2861 }
2862 }
2863 return TRUE;
2864 }
2865
2866 else
2867 return print_ol(find_option(name,
2868 optionlist_config, nelem(optionlist_config)),
2869 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2870 }
2871
2872 /* Handle the options for a router or transport. Skip options that are flagged
2873 as hidden. Some of these are options with names starting with '*', used for
2874 internal alternative representations of other options (which the printing
2875 function will sort out). Others are synonyms kept for backward compatibility.
2876 */
2877
2878 if (Ustrcmp(type, "router") == 0)
2879 {
2880 d = (driver_instance *)routers;
2881 ol2 = optionlist_routers;
2882 size = optionlist_routers_size;
2883 }
2884 else if (Ustrcmp(type, "transport") == 0)
2885 {
2886 d = (driver_instance *)transports;
2887 ol2 = optionlist_transports;
2888 size = optionlist_transports_size;
2889 }
2890 else if (Ustrcmp(type, "authenticator") == 0)
2891 {
2892 d = (driver_instance *)auths;
2893 ol2 = optionlist_auths;
2894 size = optionlist_auths_size;
2895 }
2896
2897 else if (Ustrcmp(type, "macro") == 0)
2898 {
2899 /* People store passwords in macros and they were previously not available
2900 for printing. So we have an admin_users restriction. */
2901 if (!f.admin_user)
2902 {
2903 fprintf(stderr, "exim: permission denied\n");
2904 return FALSE;
2905 }
2906 for (macro_item * m = macros; m; m = m->next)
2907 if (!name || Ustrcmp(name, m->name) == 0)
2908 {
2909 if (names_only)
2910 printf("%s\n", CS m->name);
2911 else if (no_labels)
2912 printf("%s\n", CS m->replacement);
2913 else
2914 printf("%s=%s\n", CS m->name, CS m->replacement);
2915 if (name)
2916 return TRUE;
2917 }
2918 if (!name) return TRUE;
2919
2920 printf("%s %s not found\n", type, name);
2921 return FALSE;
2922 }
2923
2924 if (names_only)
2925 {
2926 for (; d; d = d->next) printf("%s\n", CS d->name);
2927 return TRUE;
2928 }
2929
2930 /* Either search for a given driver, or print all of them */
2931
2932 for (; d; d = d->next)
2933 {
2934 BOOL rc = FALSE;
2935 if (!name)
2936 printf("\n%s %s:\n", d->name, type);
2937 else if (Ustrcmp(d->name, name) != 0) continue;
2938
2939 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
2940 if (!(ol->type & opt_hidden))
2941 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2942
2943 for (optionlist * ol = d->info->options;
2944 ol < d->info->options + *(d->info->options_count); ol++)
2945 if (!(ol->type & opt_hidden))
2946 rc |= print_ol(ol, US ol->name, d, d->info->options,
2947 *d->info->options_count, no_labels);
2948
2949 if (name) return rc;
2950 }
2951 if (!name) return TRUE;
2952
2953 printf("%s %s not found\n", type, name);
2954 return FALSE;
2955 }
2956
2957
2958
2959 /*************************************************
2960 * Read a named list item *
2961 *************************************************/
2962
2963 /* This function reads a name and a list (i.e. string). The name is used to
2964 save the list in a tree, sorted by its name. Each entry also has a number,
2965 which can be used for caching tests, but if the string contains any expansion
2966 items other than $key, the number is set negative to inhibit caching. This
2967 mechanism is used for domain, host, and address lists that are referenced by
2968 the "+name" syntax.
2969
2970 Arguments:
2971 anchorp points to the tree anchor
2972 numberp points to the current number for this tree
2973 max the maximum number permitted
2974 s the text of the option line, starting immediately after the name
2975 of the list type
2976 tname the name of the list type, for messages
2977
2978 Returns: nothing
2979 */
2980
2981 static void
2982 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2983 uschar *tname)
2984 {
2985 BOOL forcecache = FALSE;
2986 uschar *ss;
2987 tree_node *t;
2988 namedlist_block *nb = store_get(sizeof(namedlist_block), FALSE);
2989
2990 if (Ustrncmp(s, "_cache", 6) == 0)
2991 {
2992 forcecache = TRUE;
2993 s += 6;
2994 }
2995
2996 if (!isspace(*s))
2997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2998
2999 if (*numberp >= max)
3000 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3001 tname, max);
3002
3003 while (isspace(*s)) s++;
3004 ss = s;
3005 while (isalnum(*s) || *s == '_') s++;
3006 t = store_get(sizeof(tree_node) + s-ss, is_tainted(ss));
3007 Ustrncpy(t->name, ss, s-ss);
3008 t->name[s-ss] = 0;
3009 while (isspace(*s)) s++;
3010
3011 if (!tree_insertnode(anchorp, t))
3012 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3013 "duplicate name \"%s\" for a named %s", t->name, tname);
3014
3015 t->data.ptr = nb;
3016 nb->number = *numberp;
3017 *numberp += 1;
3018
3019 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3020 "missing '=' after \"%s\"", t->name);
3021 while (isspace(*s)) s++;
3022 nb->string = read_string(s, t->name);
3023 nb->cache_data = NULL;
3024
3025 /* Check the string for any expansions; if any are found, mark this list
3026 uncacheable unless the user has explicited forced caching. */
3027
3028 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3029 }
3030
3031
3032
3033
3034 /*************************************************
3035 * Unpick data for a rate limit *
3036 *************************************************/
3037
3038 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3039 separate values.
3040
3041 Arguments:
3042 s string, in the form t,b,f,l
3043 where t is the threshold (integer)
3044 b is the initial delay (time)
3045 f is the multiplicative factor (fixed point)
3046 k is the maximum time (time)
3047 threshold where to store threshold
3048 base where to store base in milliseconds
3049 factor where to store factor in milliseconds
3050 limit where to store limit
3051
3052 Returns: nothing (panics on error)
3053 */
3054
3055 static void
3056 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3057 int *limit)
3058 {
3059 uschar bstring[16], lstring[16];
3060
3061 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3062 factor, lstring) == 4)
3063 {
3064 *base = readconf_readtime(bstring, 0, TRUE);
3065 *limit = readconf_readtime(lstring, 0, TRUE);
3066 if (*base >= 0 && *limit >= 0) return;
3067 }
3068 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3069 }
3070
3071
3072
3073
3074 /*************************************************
3075 * Drop privs for checking TLS config *
3076 *************************************************/
3077
3078 /* We want to validate TLS options during readconf, but do not want to be
3079 root when we call into the TLS library, in case of library linkage errors
3080 which cause segfaults; before this check, those were always done as the Exim
3081 runtime user and it makes sense to continue with that.
3082
3083 Assumes: tls_require_ciphers has been set, if it will be
3084 exim_user has been set, if it will be
3085 exim_group has been set, if it will be
3086
3087 Returns: bool for "okay"; false will cause caller to immediately exit.
3088 */
3089
3090 #ifndef DISABLE_TLS
3091 static BOOL
3092 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3093 {
3094 const uschar *errmsg;
3095 pid_t pid;
3096 int rc, status;
3097 void (*oldsignal)(int);
3098
3099 /* If TLS will never be used, no point checking ciphers */
3100
3101 if ( !tls_advertise_hosts
3102 || !*tls_advertise_hosts
3103 || Ustrcmp(tls_advertise_hosts, ":") == 0
3104 )
3105 return TRUE;
3106 else if (!nowarn && !tls_certificate)
3107 log_write(0, LOG_MAIN,
3108 "Warning: No server certificate defined; will use a selfsigned one.\n"
3109 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3110
3111 oldsignal = signal(SIGCHLD, SIG_DFL);
3112
3113 fflush(NULL);
3114 if ((pid = fork()) < 0)
3115 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3116
3117 if (pid == 0)
3118 {
3119 /* in some modes, will have dropped privilege already */
3120 if (!geteuid())
3121 exim_setugid(exim_uid, exim_gid, FALSE,
3122 US"calling tls_validate_require_cipher");
3123
3124 if ((errmsg = tls_validate_require_cipher()))
3125 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3126 "tls_require_ciphers invalid: %s", errmsg);
3127 fflush(NULL);
3128 exim_underbar_exit(0);
3129 }
3130
3131 do {
3132 rc = waitpid(pid, &status, 0);
3133 } while (rc < 0 && errno == EINTR);
3134
3135 DEBUG(D_tls)
3136 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3137 (int)pid, status);
3138
3139 signal(SIGCHLD, oldsignal);
3140
3141 return status == 0;
3142 }
3143 #endif /*DISABLE_TLS*/
3144
3145
3146
3147
3148 /*************************************************
3149 * Read main configuration options *
3150 *************************************************/
3151
3152 /* This function is the first to be called for configuration reading. It
3153 opens the configuration file and reads general configuration settings until
3154 it reaches the end of the configuration section. The file is then left open so
3155 that the remaining configuration data can subsequently be read if needed for
3156 this run of Exim.
3157
3158 The configuration file must be owned either by root or exim, and be writeable
3159 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3160 in the config file, so the test is done on the compiled in values. A slight
3161 anomaly, to be carefully documented.
3162
3163 The name of the configuration file is taken from a list that is included in the
3164 binary of Exim. It can be altered from the command line, but if that is done,
3165 root privilege is immediately withdrawn unless the caller is root or exim.
3166 The first file on the list that exists is used.
3167
3168 For use on multiple systems that share file systems, first look for a
3169 configuration file whose name has the current node name on the end. If that is
3170 not found, try the generic name. For really contorted configurations, that run
3171 multiple Exims with different uid settings, first try adding the effective uid
3172 before the node name. These complications are going to waste resources on most
3173 systems. Therefore they are available only when requested by compile-time
3174 options. */
3175
3176 void
3177 readconf_main(BOOL nowarn)
3178 {
3179 int sep = 0;
3180 struct stat statbuf;
3181 uschar *s, *filename;
3182 const uschar *list = config_main_filelist;
3183
3184 /* Loop through the possible file names */
3185
3186 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3187 {
3188
3189 /* Cut out all the fancy processing unless specifically wanted */
3190
3191 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3192 uschar *suffix = filename + Ustrlen(filename);
3193
3194 /* Try for the node-specific file if a node name exists */
3195
3196 #ifdef CONFIGURE_FILE_USE_NODE
3197 struct utsname uts;
3198 if (uname(&uts) >= 0)
3199 {
3200 #ifdef CONFIGURE_FILE_USE_EUID
3201 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3202 config_file = Ufopen(filename, "rb");
3203 if (config_file == NULL)
3204 #endif /* CONFIGURE_FILE_USE_EUID */
3205 {
3206 sprintf(CS suffix, ".%.256s", uts.nodename);
3207 config_file = Ufopen(filename, "rb");
3208 }
3209 }
3210 #endif /* CONFIGURE_FILE_USE_NODE */
3211
3212 /* Otherwise, try the generic name, possibly with the euid added */
3213
3214 #ifdef CONFIGURE_FILE_USE_EUID
3215 if (config_file == NULL)
3216 {
3217 sprintf(CS suffix, ".%ld", (long int)original_euid);
3218 config_file = Ufopen(filename, "rb");
3219 }
3220 #endif /* CONFIGURE_FILE_USE_EUID */
3221
3222 /* Finally, try the unadorned name */
3223
3224 if (config_file == NULL)
3225 {
3226 *suffix = 0;
3227 config_file = Ufopen(filename, "rb");
3228 }
3229 #else /* if neither defined */
3230
3231 /* This is the common case when the fancy processing is not included. */
3232
3233 config_file = Ufopen(filename, "rb");
3234 #endif
3235
3236 /* If the file does not exist, continue to try any others. For any other
3237 error, break out (and die). */
3238
3239 if (config_file != NULL || errno != ENOENT) break;
3240 }
3241
3242 /* On success, save the name for verification; config_filename is used when
3243 logging configuration errors (it changes for .included files) whereas
3244 config_main_filename is the name shown by -bP. Failure to open a configuration
3245 file is a serious disaster. */
3246
3247 if (config_file)
3248 {
3249 uschar *last_slash = Ustrrchr(filename, '/');
3250 config_filename = config_main_filename = string_copy(filename);
3251
3252 /* The config_main_directory we need for the $config_dir expansion.
3253 config_main_filename we need for $config_file expansion.
3254 And config_dir is the directory of the current configuration, used for
3255 relative .includes. We do need to know it's name, as we change our working
3256 directory later. */
3257
3258 if (filename[0] == '/')
3259 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3260 else
3261 {
3262 /* relative configuration file name: working dir + / + basename(filename) */
3263
3264 uschar buf[PATH_MAX];
3265 gstring * g;
3266
3267 if (os_getcwd(buf, PATH_MAX) == NULL)
3268 {
3269 perror("exim: getcwd");
3270 exit(EXIT_FAILURE);
3271 }
3272 g = string_cat(NULL, buf);
3273
3274 /* If the dir does not end with a "/", append one */
3275 if (g->s[g->ptr-1] != '/')
3276 g = string_catn(g, US"/", 1);
3277
3278 /* If the config file contains a "/", extract the directory part */
3279 if (last_slash)
3280 g = string_catn(g, filename, last_slash - filename);
3281
3282 config_main_directory = string_from_gstring(g);
3283 }
3284 config_directory = config_main_directory;
3285 }
3286 else
3287 {
3288 if (filename == NULL)
3289 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3290 "%s", config_main_filelist);
3291 else
3292 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3293 "configuration file %s", filename));
3294 }
3295
3296 /* Now, once we found and opened our configuration file, we change the directory
3297 to a safe place. Later we change to $spool_directory. */
3298
3299 if (Uchdir("/") < 0)
3300 {
3301 perror("exim: chdir `/': ");
3302 exit(EXIT_FAILURE);
3303 }
3304
3305 /* Check the status of the file we have opened, if we have retained root
3306 privileges and the file isn't /dev/null (which *should* be 0666). */
3307
3308 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3309 {
3310 if (fstat(fileno(config_file), &statbuf) != 0)
3311 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3312 big_buffer);
3313
3314 if ((statbuf.st_uid != root_uid /* owner not root */
3315 #ifdef CONFIGURE_OWNER
3316 && statbuf.st_uid != config_uid /* owner not the special one */
3317 #endif
3318 ) || /* or */
3319 (statbuf.st_gid != root_gid /* group not root & */
3320 #ifdef CONFIGURE_GROUP
3321 && statbuf.st_gid != config_gid /* group not the special one */
3322 #endif
3323 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3324 /* or */
3325 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3326
3327 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3328 "wrong owner, group, or mode", big_buffer);
3329
3330 /* Do a dummy store-allocation of a size related to the (toplevel) file size.
3331 This assumes we will need this much storage to handle all the allocations
3332 during startup; it won't help when .include is being used. When it does, it
3333 will cut down on the number of store blocks (and malloc calls, and sbrk
3334 syscalls). It also assume we're on the relevant pool. */
3335
3336 if (statbuf.st_size > 8192)
3337 {
3338 rmark r = store_mark();
3339 void * dummy = store_get((int)statbuf.st_size, FALSE);
3340 store_reset(r);
3341 }
3342 }
3343
3344 /* Process the main configuration settings. They all begin with a lower case
3345 letter. If we see something starting with an upper case letter, it is taken as
3346 a macro definition. */
3347
3348 while ((s = get_config_line()))
3349 {
3350 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3351 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3352 "found unexpected BOM (Byte Order Mark)");
3353
3354 if (isupper(s[0]))
3355 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3356
3357 else if (Ustrncmp(s, "domainlist", 10) == 0)
3358 read_named_list(&domainlist_anchor, &domainlist_count,
3359 MAX_NAMED_LIST, s+10, US"domain list");
3360
3361 else if (Ustrncmp(s, "hostlist", 8) == 0)
3362 read_named_list(&hostlist_anchor, &hostlist_count,
3363 MAX_NAMED_LIST, s+8, US"host list");
3364
3365 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3366 read_named_list(&addresslist_anchor, &addresslist_count,
3367 MAX_NAMED_LIST, s+11, US"address list");
3368
3369 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3370 read_named_list(&localpartlist_anchor, &localpartlist_count,
3371 MAX_NAMED_LIST, s+13, US"local part list");
3372
3373 else
3374 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3375 NULL, US"main option \"%s\" unknown");
3376 }
3377
3378
3379 /* If local_sender_retain is set, local_from_check must be unset. */
3380
3381 if (local_sender_retain && local_from_check)
3382 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3383 "local_sender_retain are set; this combination is not allowed");
3384
3385 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3386 wanted. */
3387
3388 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3389
3390 /* The max retry interval must not be greater than 24 hours. */
3391
3392 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3393
3394 /* remote_max_parallel must be > 0 */
3395
3396 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3397
3398 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3399 start of a new SMTP message. */
3400
3401 freeze_tell_config = freeze_tell;
3402
3403 /* The primary host name may be required for expansion of spool_directory
3404 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3405 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3406 canonize it. Some people like upper case letters in their host names, so we
3407 don't force the case. */
3408
3409 if (primary_hostname == NULL)
3410 {
3411 const uschar *hostname;
3412 struct utsname uts;
3413 if (uname(&uts) < 0)
3414 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3415 hostname = US uts.nodename;
3416
3417 if (Ustrchr(hostname, '.') == NULL)
3418 {
3419 int af = AF_INET;
3420 struct hostent *hostdata;
3421
3422 #if HAVE_IPV6
3423 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3424 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3425 MCL_DOMAIN, TRUE, NULL) != OK))
3426 af = AF_INET6;
3427 #else
3428 af = AF_INET;
3429 #endif
3430
3431 for (;;)
3432 {
3433 #if HAVE_IPV6
3434 #if HAVE_GETIPNODEBYNAME
3435 int error_num;
3436 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3437 #else
3438 hostdata = gethostbyname2(CS hostname, af);
3439 #endif
3440 #else
3441 hostdata = gethostbyname(CS hostname);
3442 #endif
3443
3444 if (hostdata != NULL)
3445 {
3446 hostname = US hostdata->h_name;
3447 break;
3448 }
3449
3450 if (af == AF_INET) break;
3451 af = AF_INET;
3452 }
3453 }
3454
3455 primary_hostname = string_copy(hostname);
3456 }
3457
3458 /* Set up default value for smtp_active_hostname */
3459
3460 smtp_active_hostname = primary_hostname;
3461
3462 /* If spool_directory wasn't set in the build-time configuration, it must have
3463 got set above. Of course, writing to the log may not work if log_file_path is
3464 not set, but it will at least get to syslog or somewhere, with any luck. */
3465
3466 if (*spool_directory == 0)
3467 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3468 "proceed");
3469
3470 /* Expand the spool directory name; it may, for example, contain the primary
3471 host name. Same comment about failure. */
3472
3473 s = expand_string(spool_directory);
3474 if (s == NULL)
3475 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3476 "\"%s\": %s", spool_directory, expand_string_message);
3477 spool_directory = s;
3478
3479 /* Expand log_file_path, which must contain "%s" in any component that isn't
3480 the null string or "syslog". It is also allowed to contain one instance of %D
3481 or %M. However, it must NOT contain % followed by anything else. */
3482
3483 if (*log_file_path != 0)
3484 {
3485 const uschar *ss, *sss;
3486 int sep = ':'; /* Fixed for log file path */
3487 s = expand_string(log_file_path);
3488 if (s == NULL)
3489 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3490 "\"%s\": %s", log_file_path, expand_string_message);
3491
3492 ss = s;
3493 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3494 {
3495 uschar *t;
3496 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3497 t = Ustrstr(sss, "%s");
3498 if (t == NULL)
3499 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3500 "contain \"%%s\"", sss);
3501 *t = 'X';
3502 t = Ustrchr(sss, '%');
3503 if (t != NULL)
3504 {
3505 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3506 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3507 "unexpected \"%%\" character", s);
3508 }
3509 }
3510
3511 log_file_path = s;
3512 }
3513
3514 /* Interpret syslog_facility into an integer argument for 'ident' param to
3515 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3516 leading "log_". */
3517
3518 if (syslog_facility_str)
3519 {
3520 int i;
3521 uschar *s = syslog_facility_str;
3522
3523 if ((Ustrlen(syslog_facility_str) >= 4) &&
3524 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3525 s += 4;
3526
3527 for (i = 0; i < syslog_list_size; i++)
3528 if (strcmpic(s, syslog_list[i].name) == 0)
3529 {
3530 syslog_facility = syslog_list[i].value;
3531 break;
3532 }
3533
3534 if (i >= syslog_list_size)
3535 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3536 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3537 }
3538
3539 /* Expand pid_file_path */
3540
3541 if (*pid_file_path != 0)
3542 {
3543 if (!(s = expand_string(pid_file_path)))
3544 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3545 "\"%s\": %s", pid_file_path, expand_string_message);
3546 pid_file_path = s;
3547 }
3548
3549 /* Set default value of process_log_path */
3550
3551 if (!process_log_path || *process_log_path =='\0')
3552 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3553
3554 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3555 message. */
3556
3557 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3558
3559 /* Unpick the SMTP rate limiting options, if set */
3560
3561 if (smtp_ratelimit_mail)
3562 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3563 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3564
3565 if (smtp_ratelimit_rcpt)
3566 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3567 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3568
3569 /* The qualify domains default to the primary host name */
3570
3571 if (!qualify_domain_sender)
3572 qualify_domain_sender = primary_hostname;
3573 if (!qualify_domain_recipient)
3574 qualify_domain_recipient = qualify_domain_sender;
3575
3576 /* Setting system_filter_user in the configuration sets the gid as well if a
3577 name is given, but a numerical value does not. */
3578
3579 if (system_filter_uid_set && !system_filter_gid_set)
3580 {
3581 struct passwd *pw = getpwuid(system_filter_uid);
3582 if (!pw)
3583 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3584 (long int)system_filter_uid);
3585 system_filter_gid = pw->pw_gid;
3586 system_filter_gid_set = TRUE;
3587 }
3588
3589 /* If the errors_reply_to field is set, check that it is syntactically valid
3590 and ensure it contains a domain. */
3591
3592 if (errors_reply_to)
3593 {
3594 uschar *errmess;
3595 int start, end, domain;
3596 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3597 &start, &end, &domain, FALSE);
3598
3599 if (!recipient)
3600 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3601 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3602
3603 if (domain == 0)
3604 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3605 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3606 }
3607
3608 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3609 smtp_accept_max must also be set. */
3610
3611 if (smtp_accept_max == 0 &&
3612 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3613 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3614 "smtp_accept_max must be set if smtp_accept_queue or "
3615 "smtp_accept_max_per_host is set");
3616
3617 /* Set up the host number if anything is specified. It is an expanded string
3618 so that it can be computed from the host name, for example. We do this last
3619 so as to ensure that everything else is set up before the expansion. */
3620
3621 if (host_number_string)
3622 {
3623 long int n;
3624 uschar *end;
3625 uschar *s = expand_string(host_number_string);
3626
3627 if (!s)
3628 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3629 "failed to expand localhost_number \"%s\": %s",
3630 host_number_string, expand_string_message);
3631 n = Ustrtol(s, &end, 0);
3632 while (isspace(*end)) end++;
3633 if (*end != 0)
3634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3635 "localhost_number value is not a number: %s", s);
3636 if (n > LOCALHOST_MAX)
3637 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3638 "localhost_number is greater than the maximum allowed value (%d)",
3639 LOCALHOST_MAX);
3640 host_number = n;
3641 }
3642
3643 #ifndef DISABLE_TLS
3644 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3645
3646 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3647 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3648 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3649 tls_verify_hosts ? "" : "try_");
3650
3651 /* This also checks that the library linkage is working and we can call
3652 routines in it, so call even if tls_require_ciphers is unset */
3653 if (!tls_dropprivs_validate_require_cipher(nowarn))
3654 exit(1);
3655
3656 /* Magic number: at time of writing, 1024 has been the long-standing value
3657 used by so many clients, and what Exim used to use always, that it makes
3658 sense to just min-clamp this max-clamp at that. */
3659 if (tls_dh_max_bits < 1024)
3660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3661 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3662
3663 /* If openssl_options is set, validate it */
3664 if (openssl_options)
3665 {
3666 # ifdef USE_GNUTLS
3667 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3668 "openssl_options is set but we're using GnuTLS");
3669 # else
3670 long dummy;
3671 if (!tls_openssl_options_parse(openssl_options, &dummy))
3672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3673 "openssl_options parse error: %s", openssl_options);
3674 # endif
3675 }
3676 #endif /*DISABLE_TLS*/
3677
3678 if (!nowarn && !keep_environment && environ && *environ)
3679 log_write(0, LOG_MAIN,
3680 "Warning: purging the environment.\n"
3681 " Suggested action: use keep_environment.");
3682 }
3683
3684
3685
3686 /*************************************************
3687 * Initialize one driver *
3688 *************************************************/
3689
3690 /* This is called once the driver's generic options, if any, have been read.
3691 We can now find the driver, set up defaults for the private options, and
3692 unset any "set" bits in the private options table (which might have been
3693 set by another incarnation of the same driver).
3694
3695 Arguments:
3696 d pointer to driver instance block, with generic
3697 options filled in
3698 drivers_available vector of available drivers
3699 size_of_info size of each block in drivers_available
3700 class class of driver, for error message
3701
3702 Returns: pointer to the driver info block
3703 */
3704
3705 static driver_info *
3706 init_driver(driver_instance *d, driver_info *drivers_available,
3707 int size_of_info, uschar *class)
3708 {
3709 for (driver_info * dd = drivers_available; dd->driver_name[0] != 0;
3710 dd = (driver_info *)((US dd) + size_of_info))
3711 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3712 {
3713 int len = dd->options_len;
3714 d->info = dd;
3715 d->options_block = store_get(len, FALSE);
3716 memcpy(d->options_block, dd->options_block, len);
3717 for (int i = 0; i < *(dd->options_count); i++)
3718 dd->options[i].type &= ~opt_set;
3719 return dd;
3720 }
3721
3722 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3723 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3724
3725 return NULL; /* never obeyed */
3726 }
3727
3728
3729
3730
3731 /*************************************************
3732 * Initialize driver list *
3733 *************************************************/
3734
3735 /* This function is called for routers, transports, and authentication
3736 mechanisms. It reads the data from the current point in the configuration file
3737 up to the end of the section, and sets up a chain of instance blocks according
3738 to the file's contents. The file will already have been opened by a call to
3739 readconf_main, and must be left open for subsequent reading of further data.
3740
3741 Any errors cause a panic crash. Note that the blocks with names driver_info and
3742 driver_instance must map the first portions of all the _info and _instance
3743 blocks for this shared code to work.
3744
3745 Arguments:
3746 class "router", "transport", or "authenticator"
3747 anchor &routers, &transports, &auths
3748 drivers_available available drivers
3749 size_of_info size of each info block
3750 instance_default points to default data for an instance
3751 instance_size size of instance block
3752 driver_optionlist generic option list
3753 driver_optionlist_count count of generic option list
3754
3755 Returns: nothing
3756 */
3757
3758 void
3759 readconf_driver_init(
3760 uschar *class,
3761 driver_instance **anchor,
3762 driver_info *drivers_available,
3763 int size_of_info,
3764 void *instance_default,
3765 int instance_size,
3766 optionlist *driver_optionlist,
3767 int driver_optionlist_count)
3768 {
3769 driver_instance **p = anchor;
3770 driver_instance *d = NULL;
3771 uschar *buffer;
3772
3773 while ((buffer = get_config_line()) != NULL)
3774 {
3775 uschar name[64];
3776 uschar *s;
3777
3778 /* Read the first name on the line and test for the start of a new driver. A
3779 macro definition indicates the end of the previous driver. If this isn't the
3780 start of a new driver, the line will be re-read. */
3781
3782 s = readconf_readname(name, sizeof(name), buffer);
3783
3784 /* Handle macro definition, first finishing off the initialization of the
3785 previous driver, if any. */
3786
3787 if (isupper(*name) && *s == '=')
3788 {
3789 if (d)
3790 {
3791 if (!d->driver_name)
3792 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3793 "no driver defined for %s \"%s\"", class, d->name);
3794 (d->info->init)(d);
3795 d = NULL;
3796 }
3797 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3798 continue;
3799 }
3800
3801 /* If the line starts with a name terminated by a colon, we are at the
3802 start of the definition of a new driver. The rest of the line must be
3803 blank. */
3804
3805 if (*s++ == ':')
3806 {
3807 /* Finish off initializing the previous driver. */
3808
3809 if (d)
3810 {
3811 if (!d->driver_name)
3812 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3813 "no driver defined for %s \"%s\"", class, d->name);
3814 (d->info->init)(d);
3815 }
3816
3817 /* Check that we haven't already got a driver of this name */
3818
3819 for (d = *anchor; d; d = d->next)
3820 if (Ustrcmp(name, d->name) == 0)
3821 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3822 "there are two %ss called \"%s\"", class, name);
3823
3824 /* Set up a new driver instance data block on the chain, with
3825 its default values installed. */
3826
3827 d = store_get(instance_size, FALSE);
3828 memcpy(d, instance_default, instance_size);
3829 *p = d;
3830 p = &d->next;
3831 d->name = string_copy(name);
3832
3833 /* Clear out the "set" bits in the generic options */
3834
3835 for (int i = 0; i < driver_optionlist_count; i++)
3836 driver_optionlist[i].type &= ~opt_set;
3837
3838 /* Check nothing more on this line, then do the next loop iteration. */
3839
3840 while (isspace(*s)) s++;
3841 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3842 continue;
3843 }
3844
3845 /* Not the start of a new driver. Give an error if we have not set up a
3846 current driver yet. */
3847
3848 if (!d)
3849 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3850
3851 /* First look to see if this is a generic option; if it is "driver",
3852 initialize the driver. If is it not a generic option, we can look for a
3853 private option provided that the driver has been previously set up. */
3854
3855 if (readconf_handle_option(buffer, driver_optionlist,
3856 driver_optionlist_count, d, NULL))
3857 {
3858 if (!d->info && d->driver_name)
3859 init_driver(d, drivers_available, size_of_info, class);
3860 }
3861
3862 /* Handle private options - pass the generic block because some may
3863 live therein. A flag with each option indicates if it is in the public
3864 block. */
3865
3866 else if (d->info)
3867 readconf_handle_option(buffer, d->info->options,
3868 *(d->info->options_count), d, US"option \"%s\" unknown");
3869
3870 /* The option is not generic and the driver name has not yet been given. */
3871
3872 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3873 "(\"driver\" must be specified before any private options)", name);
3874 }
3875
3876 /* Run the initialization function for the final driver. */
3877
3878 if (d)
3879 {
3880 if (!d->driver_name)
3881 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3882 "no driver defined for %s \"%s\"", class, d->name);
3883 (d->info->init)(d);
3884 }
3885 }
3886
3887
3888
3889 /*************************************************
3890 * Check driver dependency *
3891 *************************************************/
3892
3893 /* This function is passed a driver instance and a string. It checks whether
3894 any of the string options for the driver contains the given string as an
3895 expansion variable.
3896
3897 Arguments:
3898 d points to a driver instance block
3899 s the string to search for
3900
3901 Returns: TRUE if a dependency is found
3902 */
3903
3904 BOOL
3905 readconf_depends(driver_instance *d, uschar *s)
3906 {
3907 int count = *(d->info->options_count);
3908 uschar *ss;
3909
3910 for (optionlist * ol = d->info->options; ol < d->info->options + count; ol++)
3911 {
3912 void *options_block;
3913 uschar *value;
3914 int type = ol->type & opt_mask;
3915 if (type != opt_stringptr) continue;
3916 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3917 value = *(uschar **)(US options_block + (long int)(ol->value));
3918 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3919 {
3920 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3921 isalnum(ss[Ustrlen(s)])) continue;
3922 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3923 d->name, ol->name, s);
3924 return TRUE;
3925 }
3926 }
3927
3928 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3929 return FALSE;
3930 }
3931
3932
3933
3934
3935 /*************************************************
3936 * Decode an error type for retries *
3937 *************************************************/
3938
3939 /* This function is global because it is also called from the main
3940 program when testing retry information. It decodes strings such as "quota_7d"
3941 into numerical error codes.
3942
3943 Arguments:
3944 pp points to start of text
3945 p points past end of text
3946 basic_errno points to an int to receive the main error number
3947 more_errno points to an int to receive the secondary error data
3948
3949 Returns: NULL if decoded correctly; else points to error text
3950 */
3951
3952 uschar *
3953 readconf_retry_error(const uschar *pp, const uschar *p,
3954 int *basic_errno, int *more_errno)
3955 {
3956 int len;
3957 const uschar *q = pp;
3958 while (q < p && *q != '_') q++;
3959 len = q - pp;
3960
3961 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3962 {
3963 *basic_errno = ERRNO_EXIMQUOTA;
3964 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3965 return US"bad time value";
3966 }
3967
3968 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3969 {
3970 *basic_errno = ECONNREFUSED;
3971 if (q != p)
3972 {
3973 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3974 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3975 else return US"A or MX expected after \"refused\"";
3976 }
3977 }
3978
3979 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3980 {
3981 *basic_errno = ETIMEDOUT;
3982 if (q != p)
3983 {
3984 int i;
3985 int xlen = p - q - 1;
3986 const uschar *x = q + 1;
3987
3988 static uschar *extras[] =
3989 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3990 static int values[] =
3991 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3992
3993 for (i = 0; i < nelem(extras); i++)
3994 if (strncmpic(x, extras[i], xlen) == 0)
3995 {
3996 *more_errno = values[i];
3997 break;
3998 }
3999
4000 if (i >= nelem(extras))
4001 if (strncmpic(x, US"DNS", xlen) == 0)
4002 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
4003 "available in retry rules (it has never worked) - treated as "
4004 "\"timeout\"");
4005 else
4006 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
4007 }
4008 }
4009
4010 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
4011 strncmpic(pp, US"rcpt_4", 6) == 0 ||
4012 strncmpic(pp, US"data_4", 6) == 0)
4013 {
4014 BOOL bad = FALSE;
4015 int x = 255; /* means "any 4xx code" */
4016 if (p != pp + 8) bad = TRUE; else
4017 {
4018 int a = pp[6], b = pp[7];
4019 if (isdigit(a))
4020 {
4021 x = (a - '0') * 10;
4022 if (isdigit(b)) x += b - '0';
4023 else if (b == 'x') x += 100;
4024 else bad = TRUE;
4025 }
4026 else if (a != 'x' || b != 'x') bad = TRUE;
4027 }
4028
4029 if (bad)
4030 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4031 "x is literal and d is any digit", pp);
4032
4033 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4034 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4035 *more_errno = x << 8;
4036 }
4037
4038 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4039 strncmpic(q+1, US"failed", p-q-1) == 0)
4040 *basic_errno = ERRNO_AUTHFAIL;
4041
4042 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4043 *basic_errno = ERRNO_SMTPCLOSED;
4044
4045 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4046 *basic_errno = ERRNO_TLSREQUIRED;
4047
4048 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4049 *basic_errno = ERRNO_UNKNOWNHOST;
4050
4051 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4052 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4053
4054 return NULL;
4055 }
4056
4057
4058
4059
4060 /*************************************************
4061 * Read retry information *
4062 *************************************************/
4063
4064 /* Each line of retry information contains:
4065
4066 . A domain name pattern or an address pattern;
4067
4068 . An error name, possibly with additional data, or *;
4069
4070 . An optional sequence of retry items, each consisting of an identifying
4071 letter, a cutoff time, and optional parameters.
4072
4073 All this is decoded and placed into a control block. */
4074
4075
4076 /* Subroutine to read an argument, preceded by a comma and terminated
4077 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4078 1 = fixed point number (returned *1000).
4079
4080 Arguments:
4081 paddr pointer to pointer to current character; updated
4082 type 0 => read a time; 1 => read a fixed point number
4083
4084 Returns: time in seconds or fixed point number * 1000
4085 */
4086
4087 static int
4088 retry_arg(const uschar **paddr, int type)
4089 {
4090 const uschar *p = *paddr;
4091 const uschar *pp;
4092
4093 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4094
4095 while (isspace(*p)) p++;
4096 pp = p;
4097 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4098
4099 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4100 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4101
4102 *paddr = p;
4103 switch (type)
4104 {
4105 case 0: return readconf_readtime(pp, *p, FALSE);
4106 case 1: return readconf_readfixed(pp, *p);
4107 }
4108 return 0; /* Keep picky compilers happy */
4109 }
4110
4111 /* The function proper */
4112
4113 void
4114 readconf_retries(void)
4115 {
4116 retry_config **chain = &retries;
4117 retry_config *next;
4118 const uschar *p;
4119
4120 while ((p = get_config_line()))
4121 {
4122 retry_rule **rchain;
4123 const uschar *pp;
4124 uschar *error;
4125
4126 next = store_get(sizeof(retry_config), FALSE);
4127 next->next = NULL;
4128 *chain = next;
4129 chain = &(next->next);
4130 next->basic_errno = next->more_errno = 0;
4131 next->senders = NULL;
4132 next->rules = NULL;
4133 rchain = &(next->rules);
4134
4135 next->pattern = string_dequote(&p);
4136 while (isspace(*p)) p++;
4137 pp = p;
4138 while (mac_isgraph(*p)) p++;
4139 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4140 "missing error type in retry rule");
4141
4142 /* Test error names for things we understand. */
4143
4144 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4145 &next->more_errno)))
4146 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4147
4148 /* There may be an optional address list of senders to be used as another
4149 constraint on the rule. This was added later, so the syntax is a bit of a
4150 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4151 an address list. */
4152
4153 while (isspace(*p)) p++;
4154 if (Ustrncmp(p, "senders", 7) == 0)
4155 {
4156 p += 7;
4157 while (isspace(*p)) p++;
4158 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4159 "\"=\" expected after \"senders\" in retry rule");
4160 while (isspace(*p)) p++;
4161 next->senders = string_dequote(&p);
4162 }
4163
4164 /* Now the retry rules. Keep the maximum timeout encountered. */
4165
4166 while (isspace(*p)) p++;
4167
4168 while (*p != 0)
4169 {
4170 retry_rule *rule = store_get(sizeof(retry_rule), FALSE);
4171 *rchain = rule;
4172 rchain = &(rule->next);
4173 rule->next = NULL;
4174 rule->rule = toupper(*p++);
4175 rule->timeout = retry_arg(&p, 0);
4176 if (rule->timeout > retry_maximum_timeout)
4177 retry_maximum_timeout = rule->timeout;
4178
4179 switch (rule->rule)
4180 {
4181 case 'F': /* Fixed interval */
4182 rule->p1 = retry_arg(&p, 0);
4183 break;
4184
4185 case 'G': /* Geometrically increasing intervals */
4186 case 'H': /* Ditto, but with randomness */
4187 rule->p1 = retry_arg(&p, 0);
4188 rule->p2 = retry_arg(&p, 1);
4189 break;
4190
4191 default:
4192 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4193 break;
4194 }
4195
4196 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4197 (rule->rule != 'F' && rule->p2 < 1000))
4198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4199 "bad parameters for retry rule");
4200
4201 while (isspace(*p)) p++;
4202 if (*p == ';')
4203 {
4204 p++;
4205 while (isspace(*p)) p++;
4206 }
4207 else if (*p != 0)
4208 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4209 }
4210 }
4211 }
4212
4213
4214
4215 /*************************************************
4216 * Initialize authenticators *
4217 *************************************************/
4218
4219 /* Read the authenticators section of the configuration file.
4220
4221 Arguments: none
4222 Returns: nothing
4223 */
4224
4225 static void
4226 auths_init(void)
4227 {
4228 #ifdef SUPPORT_PIPE_CONNECT
4229 int nauths = 0;
4230 #endif
4231
4232 readconf_driver_init(US"authenticator",
4233 (driver_instance **)(&auths), /* chain anchor */
4234 (driver_info *)auths_available, /* available drivers */
4235 sizeof(auth_info), /* size of info block */
4236 &auth_defaults, /* default values for generic options */
4237 sizeof(auth_instance), /* size of instance block */
4238 optionlist_auths, /* generic options */
4239 optionlist_auths_size);
4240
4241 for (auth_instance * au = auths; au; au = au->next)
4242 {
4243 if (!au->public_name)
4244 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4245 "the %s authenticator", au->name);
4246
4247 for (auth_instance * bu = au->next; bu; bu = bu->next)
4248 if (strcmpic(au->public_name, bu->public_name) == 0)
4249 if ((au->client && bu->client) || (au->server && bu->server))
4250 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4251 "(%s and %s) have the same public name (%s)",
4252 au->client ? US"client" : US"server", au->name, bu->name,
4253 au->public_name);
4254 #ifdef SUPPORT_PIPE_CONNECT
4255 nauths++;
4256 #endif
4257 }
4258 #ifdef SUPPORT_PIPE_CONNECT
4259 f.smtp_in_early_pipe_no_auth = nauths > 16;
4260 #endif
4261 }
4262
4263
4264
4265
4266 /*************************************************
4267 * Read ACL information *
4268 *************************************************/
4269
4270 /* If this run of Exim is not doing something that involves receiving a
4271 message, we can just skip over the ACL information. No need to parse it.
4272
4273 First, we have a function for acl_read() to call back to get the next line. We
4274 need to remember the line we passed, because at the end it will contain the
4275 name of the next ACL. */
4276
4277 static uschar *acl_line;
4278
4279 static uschar *
4280 acl_callback(void)
4281 {
4282 acl_line = get_config_line();
4283 return acl_line;
4284 }
4285
4286
4287 /* Now the main function:
4288
4289 Arguments: none
4290 Returns: nothing
4291 */
4292
4293 static void
4294 readconf_acl(void)
4295 {
4296 uschar *p;
4297
4298 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4299 between ACLs. */
4300
4301 acl_line = get_config_line();
4302
4303 while(acl_line)
4304 {
4305 uschar name[64];
4306 tree_node *node;
4307 uschar *error;
4308
4309 p = readconf_readname(name, sizeof(name), acl_line);
4310 if (isupper(*name) && *p == '=')
4311 {
4312 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4313 acl_line = get_config_line();
4314 continue;
4315 }
4316
4317 if (*p != ':' || name[0] == 0)
4318 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4319
4320 node = store_get(sizeof(tree_node) + Ustrlen(name), is_tainted(name));
4321 Ustrcpy(node->name, name);
4322 if (!tree_insertnode(&acl_anchor, node))
4323 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4324 "there are two ACLs called \"%s\"", name);
4325
4326 node->data.ptr = acl_read(acl_callback, &error);
4327
4328 if (node->data.ptr == NULL && error != NULL)
4329 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4330 }
4331 }
4332
4333
4334
4335 /*************************************************
4336 * Read configuration for local_scan() *
4337 *************************************************/
4338
4339 /* This function is called after "begin local_scan" is encountered in the
4340 configuration file. If the local_scan() function allows for configuration
4341 options, we can process them. Otherwise, we expire in a panic.
4342
4343 Arguments: none
4344 Returns: nothing
4345 */
4346
4347 static void
4348 local_scan_init(void)
4349 {
4350 #ifndef LOCAL_SCAN_HAS_OPTIONS
4351 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4352 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4353 #else
4354
4355 uschar *p;
4356 while ((p = get_config_line()))
4357 {
4358 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4359 NULL, US"local_scan option \"%s\" unknown");
4360 }
4361 #endif
4362 }
4363
4364
4365
4366 /*************************************************
4367 * Read rest of configuration (after main) *
4368 *************************************************/
4369
4370 /* This function reads the rest of the runtime configuration, after the main
4371 configuration. It is called only when actually needed. Each subsequent section
4372 of the configuration starts with a line of the form
4373
4374 begin name
4375
4376 where the name is "routers", "transports", etc. A section is terminated by
4377 hitting the next "begin" line, and the next name is left in next_section.
4378 Because it may confuse people as to whether the names are singular or plural,
4379 we add "s" if it's missing. There is always enough room in next_section for
4380 this. This function is basically just a switch.
4381
4382 Arguments: none
4383 Returns: nothing
4384 */
4385
4386 static uschar *section_list[] = {
4387 US"acls",
4388 US"authenticators",
4389 US"local_scans",
4390 US"retrys",
4391 US"rewrites",
4392 US"routers",
4393 US"transports"};
4394
4395 void
4396 readconf_rest(void)
4397 {
4398 int had = 0;
4399
4400 while(next_section[0] != 0)
4401 {
4402 int bit;
4403 int first = 0;
4404 int last = nelem(section_list);
4405 int mid = last/2;
4406 int n = Ustrlen(next_section);
4407
4408 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, US"s");
4409
4410 for (;;)
4411 {
4412 int c = strcmpic(next_section, section_list[mid]);
4413 if (c == 0) break;
4414 if (c > 0) first = mid + 1; else last = mid;
4415 if (first >= last)
4416 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4417 "\"%.*s\" is not a known configuration section name", n, next_section);
4418 mid = (last + first)/2;
4419 }
4420
4421 bit = 1 << mid;
4422 if (((had ^= bit) & bit) == 0)
4423 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4424 "\"%.*s\" section is repeated in the configuration file", n,
4425 next_section);
4426
4427 switch(mid)
4428 {
4429 case 0: readconf_acl(); break;
4430 case 1: auths_init(); break;
4431 case 2: local_scan_init(); break;
4432 case 3: readconf_retries(); break;
4433 case 4: readconf_rewrites(); break;
4434 case 5: route_init(); break;
4435 case 6: transport_init(); break;
4436 }
4437 }
4438
4439 (void)fclose(config_file);
4440 }
4441
4442 /* Init the storage for the pre-parsed config lines */
4443 void
4444 readconf_save_config(const uschar *s)
4445 {
4446 save_config_line(string_sprintf("# Exim Configuration (%s)",
4447 f.running_in_test_harness ? US"X" : s));
4448 }
4449
4450 static void
4451 save_config_position(const uschar *file, int line)
4452 {
4453 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4454 }
4455
4456 /* Append a pre-parsed logical line to the config lines store,
4457 this operates on a global (static) list that holds all the pre-parsed
4458 config lines, we do no further processing here, output formatting and
4459 honouring of <hide> or macros will be done during output */
4460
4461 static void
4462 save_config_line(const uschar* line)
4463 {
4464 static config_line_item *current;
4465 config_line_item *next;
4466
4467 next = (config_line_item*) store_get(sizeof(config_line_item), FALSE);
4468 next->line = string_copy(line);
4469 next->next = NULL;
4470
4471 if (!config_lines) config_lines = next;
4472 else current->next = next;
4473
4474 current = next;
4475 }
4476
4477 /* List the parsed config lines, care about nice formatting and
4478 hide the <hide> values unless we're the admin user */
4479 void
4480 print_config(BOOL admin, BOOL terse)
4481 {
4482 const int TS = terse ? 0 : 2;
4483 int indent = 0;
4484
4485 for (config_line_item * i = config_lines; i; i = i->next)
4486 {
4487 uschar *current;
4488 uschar *p;
4489
4490 /* skip over to the first non-space */
4491 for (current = i->line; *current && isspace(*current); ++current)
4492 ;
4493
4494 if (*current == '\0')
4495 continue;
4496
4497 /* Collapse runs of spaces. We stop this if we encounter one of the
4498 * following characters: "'$, as this may indicate careful formatting */
4499 for (p = current; *p; ++p)
4500 {
4501 uschar *next;
4502 if (!isspace(*p)) continue;
4503 if (*p != ' ') *p = ' ';
4504
4505 for (next = p; isspace(*next); ++next)
4506 ;
4507
4508 if (next - p > 1)
4509 memmove(p+1, next, Ustrlen(next)+1);
4510
4511 if (*next == '"' || *next == '\'' || *next == '$')
4512 break;
4513 }
4514
4515 /* # lines */
4516 if (current[0] == '#')
4517 puts(CCS current);
4518
4519 /* begin lines are left aligned */
4520 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4521 {
4522 if (!terse) puts("");
4523 puts(CCS current);
4524 indent = TS;
4525 }
4526
4527 /* router/acl/transport block names */
4528 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4529 {
4530 if (!terse) puts("");
4531 printf("%*s%s\n", TS, "", current);
4532 indent = 2 * TS;
4533 }
4534
4535 /* hidden lines (all MACROS or lines prefixed with "hide") */
4536 else if ( !admin
4537 && ( isupper(*current)
4538 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4539 )
4540 )
4541 {
4542 if ((p = Ustrchr(current, '=')))
4543 {
4544 *p = '\0';
4545 printf("%*s%s= %s\n", indent, "", current, hidden);
4546 }
4547 /* e.g.: hide split_spool_directory */
4548 else
4549 printf("%*s\n", indent, hidden);
4550 }
4551
4552 else
4553 /* rest is public */
4554 printf("%*s%s\n", indent, "", current);
4555 }
4556 }
4557
4558 #endif /*!MACRO_PREDEF*/
4559 /* vi: aw ai sw=2
4560 */
4561 /* End of readconf.c */
Unnamed repository; edit this file 'description' to name the repository.