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