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bf024efc9ed0488b7fcc1465373e6af8e38669d0
[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 static uschar * syslog_facility_str;
19 static void fn_smtp_receive_timeout(const uschar *, const uschar *);
20
21 /*************************************************
22 * Main configuration options *
23 *************************************************/
24
25 /* The list of options that can be set in the main configuration file. This
26 must be in alphabetic order because it is searched by binary chop. */
27
28 static optionlist optionlist_config[] = {
29 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
30 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
31 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
32 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
33 { "accept_8bitmime", opt_bool, &accept_8bitmime },
34 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
35 #ifdef WITH_CONTENT_SCAN
36 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
37 #endif
38 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
39 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
40 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
41 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
42 #ifndef DISABLE_PRDR
43 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
44 #endif
45 #ifndef DISABLE_DKIM
46 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
47 #endif
48 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
49 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
50 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
51 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
52 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
53 #ifdef WITH_CONTENT_SCAN
54 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
55 #endif
56 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
57 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
58 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
59 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
60 #ifdef SUPPORT_TLS
61 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
62 #endif
63 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
64 { "add_environment", opt_stringptr, &add_environment },
65 { "admin_groups", opt_gidlist, &admin_groups },
66 { "allow_domain_literals", opt_bool, &allow_domain_literals },
67 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
68 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
69 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
70 { "auto_thaw", opt_time, &auto_thaw },
71 #ifdef WITH_CONTENT_SCAN
72 { "av_scanner", opt_stringptr, &av_scanner },
73 #endif
74 { "bi_command", opt_stringptr, &bi_command },
75 #ifdef EXPERIMENTAL_BRIGHTMAIL
76 { "bmi_config_file", opt_stringptr, &bmi_config_file },
77 #endif
78 { "bounce_message_file", opt_stringptr, &bounce_message_file },
79 { "bounce_message_text", opt_stringptr, &bounce_message_text },
80 { "bounce_return_body", opt_bool, &bounce_return_body },
81 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
82 { "bounce_return_message", opt_bool, &bounce_return_message },
83 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
84 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
85 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
86 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
87 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
88 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
89 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
90 { "check_log_inodes", opt_int, &check_log_inodes },
91 { "check_log_space", opt_Kint, &check_log_space },
92 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
93 { "check_spool_inodes", opt_int, &check_spool_inodes },
94 { "check_spool_space", opt_Kint, &check_spool_space },
95 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
96 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
97 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
98 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
99 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
100 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
101 #ifdef EXPERIMENTAL_DCC
102 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
103 { "dccifd_address", opt_stringptr, &dccifd_address },
104 { "dccifd_options", opt_stringptr, &dccifd_options },
105 #endif
106 { "debug_store", opt_bool, &debug_store },
107 { "delay_warning", opt_timelist, &delay_warning },
108 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
109 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
110 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
111 { "delivery_date_remove", opt_bool, &delivery_date_remove },
112 #ifdef ENABLE_DISABLE_FSYNC
113 { "disable_fsync", opt_bool, &disable_fsync },
114 #endif
115 { "disable_ipv6", opt_bool, &disable_ipv6 },
116 #ifndef DISABLE_DKIM
117 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
118 #endif
119 #ifdef EXPERIMENTAL_DMARC
120 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
121 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
122 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
123 #endif
124 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
125 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
126 { "dns_cname_loops", opt_int, &dns_cname_loops },
127 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
128 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
129 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
130 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
131 { "dns_retrans", opt_time, &dns_retrans },
132 { "dns_retry", opt_int, &dns_retry },
133 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
134 { "dns_use_edns0", opt_int, &dns_use_edns0 },
135 /* This option is now a no-op, retained for compatibility */
136 { "drop_cr", opt_bool, &drop_cr },
137 /*********************************************************/
138 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
139 { "dsn_from", opt_stringptr, &dsn_from },
140 { "envelope_to_remove", opt_bool, &envelope_to_remove },
141 { "errors_copy", opt_stringptr, &errors_copy },
142 { "errors_reply_to", opt_stringptr, &errors_reply_to },
143 #ifndef DISABLE_EVENT
144 { "event_action", opt_stringptr, &event_action },
145 #endif
146 { "exim_group", opt_gid, &exim_gid },
147 { "exim_path", opt_stringptr, &exim_path },
148 { "exim_user", opt_uid, &exim_uid },
149 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
150 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
151 { "finduser_retries", opt_int, &finduser_retries },
152 { "freeze_tell", opt_stringptr, &freeze_tell },
153 { "gecos_name", opt_stringptr, &gecos_name },
154 { "gecos_pattern", opt_stringptr, &gecos_pattern },
155 #ifdef SUPPORT_TLS
156 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
157 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
158 #endif
159 { "header_line_maxsize", opt_int, &header_line_maxsize },
160 { "header_maxsize", opt_int, &header_maxsize },
161 { "headers_charset", opt_stringptr, &headers_charset },
162 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
163 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
164 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
165 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
166 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
167 { "hold_domains", opt_stringptr, &hold_domains },
168 { "host_lookup", opt_stringptr, &host_lookup },
169 { "host_lookup_order", opt_stringptr, &host_lookup_order },
170 { "host_reject_connection", opt_stringptr, &host_reject_connection },
171 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
172 #ifdef SUPPORT_PROXY
173 { "hosts_proxy", opt_stringptr, &hosts_proxy },
174 #endif
175 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
176 #ifdef LOOKUP_IBASE
177 { "ibase_servers", opt_stringptr, &ibase_servers },
178 #endif
179 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
180 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
181 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
182 { "keep_environment", opt_stringptr, &keep_environment },
183 { "keep_malformed", opt_time, &keep_malformed },
184 #ifdef LOOKUP_LDAP
185 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
186 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
187 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
188 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
189 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
190 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
191 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
192 { "ldap_start_tls", opt_bool, &eldap_start_tls },
193 { "ldap_version", opt_int, &eldap_version },
194 #endif
195 { "local_from_check", opt_bool, &local_from_check },
196 { "local_from_prefix", opt_stringptr, &local_from_prefix },
197 { "local_from_suffix", opt_stringptr, &local_from_suffix },
198 { "local_interfaces", opt_stringptr, &local_interfaces },
199 #ifdef HAVE_LOCAL_SCAN
200 { "local_scan_timeout", opt_time, &local_scan_timeout },
201 #endif
202 { "local_sender_retain", opt_bool, &local_sender_retain },
203 { "localhost_number", opt_stringptr, &host_number_string },
204 { "log_file_path", opt_stringptr, &log_file_path },
205 { "log_selector", opt_stringptr, &log_selector_string },
206 { "log_timezone", opt_bool, &log_timezone },
207 { "lookup_open_max", opt_int, &lookup_open_max },
208 { "max_username_length", opt_int, &max_username_length },
209 { "message_body_newlines", opt_bool, &message_body_newlines },
210 { "message_body_visible", opt_mkint, &message_body_visible },
211 { "message_id_header_domain", opt_stringptr, &message_id_domain },
212 { "message_id_header_text", opt_stringptr, &message_id_text },
213 { "message_logs", opt_bool, &message_logs },
214 { "message_size_limit", opt_stringptr, &message_size_limit },
215 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
216 { "move_frozen_messages", opt_bool, &move_frozen_messages },
217 #endif
218 { "mua_wrapper", opt_bool, &mua_wrapper },
219 #ifdef LOOKUP_MYSQL
220 { "mysql_servers", opt_stringptr, &mysql_servers },
221 #endif
222 { "never_users", opt_uidlist, &never_users },
223 #ifdef SUPPORT_TLS
224 { "openssl_options", opt_stringptr, &openssl_options },
225 #endif
226 #ifdef LOOKUP_ORACLE
227 { "oracle_servers", opt_stringptr, &oracle_servers },
228 #endif
229 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
230 #ifdef EXIM_PERL
231 { "perl_at_start", opt_bool, &opt_perl_at_start },
232 { "perl_startup", opt_stringptr, &opt_perl_startup },
233 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
234 #endif
235 #ifdef LOOKUP_PGSQL
236 { "pgsql_servers", opt_stringptr, &pgsql_servers },
237 #endif
238 { "pid_file_path", opt_stringptr, &pid_file_path },
239 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
240 #ifndef DISABLE_PRDR
241 { "prdr_enable", opt_bool, &prdr_enable },
242 #endif
243 { "preserve_message_logs", opt_bool, &preserve_message_logs },
244 { "primary_hostname", opt_stringptr, &primary_hostname },
245 { "print_topbitchars", opt_bool, &print_topbitchars },
246 { "process_log_path", opt_stringptr, &process_log_path },
247 { "prod_requires_admin", opt_bool, &prod_requires_admin },
248 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
249 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
250 { "queue_domains", opt_stringptr, &queue_domains },
251 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
252 { "queue_only", opt_bool, &queue_only },
253 { "queue_only_file", opt_stringptr, &queue_only_file },
254 { "queue_only_load", opt_fixed, &queue_only_load },
255 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
256 { "queue_only_override", opt_bool, &queue_only_override },
257 { "queue_run_in_order", opt_bool, &queue_run_in_order },
258 { "queue_run_max", opt_stringptr, &queue_run_max },
259 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
260 { "receive_timeout", opt_time, &receive_timeout },
261 { "received_header_text", opt_stringptr, &received_header_text },
262 { "received_headers_max", opt_int, &received_headers_max },
263 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
264 { "recipients_max", opt_int, &recipients_max },
265 { "recipients_max_reject", opt_bool, &recipients_max_reject },
266 #ifdef LOOKUP_REDIS
267 { "redis_servers", opt_stringptr, &redis_servers },
268 #endif
269 { "remote_max_parallel", opt_int, &remote_max_parallel },
270 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
271 { "retry_data_expire", opt_time, &retry_data_expire },
272 { "retry_interval_max", opt_time, &retry_interval_max },
273 { "return_path_remove", opt_bool, &return_path_remove },
274 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
275 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
276 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
277 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
278 { "slow_lookup_log", opt_int, &slow_lookup_log },
279 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
280 { "smtp_accept_max", opt_int, &smtp_accept_max },
281 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
282 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
283 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
284 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
285 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
286 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
287 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
288 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
289 { "smtp_banner", opt_stringptr, &smtp_banner },
290 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
291 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
292 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
293 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
294 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
295 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
296 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
297 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
298 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
299 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
300 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
301 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
302 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
303 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
304 #ifdef SUPPORT_I18N
305 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
306 #endif
307 #ifdef WITH_CONTENT_SCAN
308 { "spamd_address", opt_stringptr, &spamd_address },
309 #endif
310 #ifdef SUPPORT_SPF
311 { "spf_guess", opt_stringptr, &spf_guess },
312 #endif
313 { "split_spool_directory", opt_bool, &split_spool_directory },
314 { "spool_directory", opt_stringptr, &spool_directory },
315 { "spool_wireformat", opt_bool, &spool_wireformat },
316 #ifdef LOOKUP_SQLITE
317 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
318 #endif
319 #ifdef EXPERIMENTAL_SRS
320 { "srs_config", opt_stringptr, &srs_config },
321 { "srs_hashlength", opt_int, &srs_hashlength },
322 { "srs_hashmin", opt_int, &srs_hashmin },
323 { "srs_maxage", opt_int, &srs_maxage },
324 { "srs_secrets", opt_stringptr, &srs_secrets },
325 { "srs_usehash", opt_bool, &srs_usehash },
326 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
327 #endif
328 { "strict_acl_vars", opt_bool, &strict_acl_vars },
329 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
330 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
331 { "syslog_duplication", opt_bool, &syslog_duplication },
332 { "syslog_facility", opt_stringptr, &syslog_facility_str },
333 { "syslog_pid", opt_bool, &syslog_pid },
334 { "syslog_processname", opt_stringptr, &syslog_processname },
335 { "syslog_timestamp", opt_bool, &syslog_timestamp },
336 { "system_filter", opt_stringptr, &system_filter },
337 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
338 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
339 { "system_filter_group", opt_gid, &system_filter_gid },
340 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
341 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
342 { "system_filter_user", opt_uid, &system_filter_uid },
343 { "tcp_nodelay", opt_bool, &tcp_nodelay },
344 #ifdef USE_TCP_WRAPPERS
345 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
346 #endif
347 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
348 { "timezone", opt_stringptr, &timezone_string },
349 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
350 #ifdef SUPPORT_TLS
351 # ifdef EXPERIMENTAL_REQUIRETLS
352 { "tls_advertise_requiretls", opt_stringptr, &tls_advertise_requiretls },
353 # endif
354 { "tls_certificate", opt_stringptr, &tls_certificate },
355 { "tls_crl", opt_stringptr, &tls_crl },
356 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
357 { "tls_dhparam", opt_stringptr, &tls_dhparam },
358 { "tls_eccurve", opt_stringptr, &tls_eccurve },
359 # ifndef DISABLE_OCSP
360 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
361 # endif
362 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
363 { "tls_privatekey", opt_stringptr, &tls_privatekey },
364 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
365 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
366 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
367 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
368 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
369 #endif
370 { "trusted_groups", opt_gidlist, &trusted_groups },
371 { "trusted_users", opt_uidlist, &trusted_users },
372 { "unknown_login", opt_stringptr, &unknown_login },
373 { "unknown_username", opt_stringptr, &unknown_username },
374 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
375 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
376 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
377 { "warn_message_file", opt_stringptr, &warn_message_file },
378 { "write_rejectlog", opt_bool, &write_rejectlog }
379 };
380
381 #ifndef MACRO_PREDEF
382 static int optionlist_config_size = nelem(optionlist_config);
383 #endif
384
385
386 #ifdef MACRO_PREDEF
387
388 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
389
390 void
391 options_main(void)
392 {
393 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
394 }
395
396 void
397 options_auths(void)
398 {
399 struct auth_info * ai;
400 uschar buf[64];
401
402 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
403
404 for (ai = auths_available; ai->driver_name[0]; ai++)
405 {
406 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
407 builtin_macro_create(buf);
408 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
409 }
410 }
411
412
413 #else /*!MACRO_PREDEF*/
414
415 extern char **environ;
416
417 static void save_config_line(const uschar* line);
418 static void save_config_position(const uschar *file, int line);
419 static void print_config(BOOL admin, BOOL terse);
420
421
422 #define CSTATE_STACK_SIZE 10
423
424 const uschar *config_directory = NULL;
425
426
427 /* Structure for chain (stack) of .included files */
428
429 typedef struct config_file_item {
430 struct config_file_item *next;
431 const uschar *filename;
432 const uschar *directory;
433 FILE *file;
434 int lineno;
435 } config_file_item;
436
437 /* Structure for chain of configuration lines (-bP config) */
438
439 typedef struct config_line_item {
440 struct config_line_item *next;
441 uschar *line;
442 } config_line_item;
443
444 static config_line_item* config_lines;
445
446 /* Structure of table of conditional words and their state transitions */
447
448 typedef struct cond_item {
449 uschar *name;
450 int namelen;
451 int action1;
452 int action2;
453 int pushpop;
454 } cond_item;
455
456 /* Structure of table of syslog facility names and values */
457
458 typedef struct syslog_fac_item {
459 uschar *name;
460 int value;
461 } syslog_fac_item;
462
463 /* constants */
464 static const char * const hidden = "<value not displayable>";
465
466 /* Static variables */
467
468 static config_file_item *config_file_stack = NULL; /* For includes */
469
470 static uschar *syslog_facility_str = NULL;
471 static uschar next_section[24];
472 static uschar time_buffer[24];
473
474 /* State variables for conditional loading (.ifdef / .else / .endif) */
475
476 static int cstate = 0;
477 static int cstate_stack_ptr = -1;
478 static int cstate_stack[CSTATE_STACK_SIZE];
479
480 /* Table of state transitions for handling conditional inclusions. There are
481 four possible state transitions:
482
483 .ifdef true
484 .ifdef false
485 .elifdef true (or .else)
486 .elifdef false
487
488 .endif just causes the previous cstate to be popped off the stack */
489
490 static int next_cstate[3][4] =
491 {
492 /* State 0: reading from file, or reading until next .else or .endif */
493 { 0, 1, 2, 2 },
494 /* State 1: condition failed, skipping until next .else or .endif */
495 { 2, 2, 0, 1 },
496 /* State 2: skipping until .endif */
497 { 2, 2, 2, 2 },
498 };
499
500 /* Table of conditionals and the states to set. For each name, there are four
501 values: the length of the name (to save computing it each time), the state to
502 set if a macro was found in the line, the state to set if a macro was not found
503 in the line, and a stack manipulation setting which is:
504
505 -1 pull state value off the stack
506 0 don't alter the stack
507 +1 push value onto stack, before setting new state
508 */
509
510 static cond_item cond_list[] = {
511 { US"ifdef", 5, 0, 1, 1 },
512 { US"ifndef", 6, 1, 0, 1 },
513 { US"elifdef", 7, 2, 3, 0 },
514 { US"elifndef", 8, 3, 2, 0 },
515 { US"else", 4, 2, 2, 0 },
516 { US"endif", 5, 0, 0, -1 }
517 };
518
519 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
520
521 /* Table of syslog facility names and their values */
522
523 static syslog_fac_item syslog_list[] = {
524 { US"mail", LOG_MAIL },
525 { US"user", LOG_USER },
526 { US"news", LOG_NEWS },
527 { US"uucp", LOG_UUCP },
528 { US"local0", LOG_LOCAL0 },
529 { US"local1", LOG_LOCAL1 },
530 { US"local2", LOG_LOCAL2 },
531 { US"local3", LOG_LOCAL3 },
532 { US"local4", LOG_LOCAL4 },
533 { US"local5", LOG_LOCAL5 },
534 { US"local6", LOG_LOCAL6 },
535 { US"local7", LOG_LOCAL7 },
536 { US"daemon", LOG_DAEMON }
537 };
538
539 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
540
541
542
543
544 /*************************************************
545 * Find the name of an option *
546 *************************************************/
547
548 /* This function is to aid debugging. Various functions take arguments that are
549 pointer variables in the options table or in option tables for various drivers.
550 For debugging output, it is useful to be able to find the name of the option
551 which is currently being processed. This function finds it, if it exists, by
552 searching the table(s).
553
554 Arguments: a value that is presumed to be in the table above
555 Returns: the option name, or an empty string
556 */
557
558 uschar *
559 readconf_find_option(void *p)
560 {
561 int i;
562 router_instance *r;
563 transport_instance *t;
564
565 for (i = 0; i < nelem(optionlist_config); i++)
566 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
567
568 for (r = routers; r; r = r->next)
569 {
570 router_info *ri = r->info;
571 for (i = 0; i < *ri->options_count; i++)
572 {
573 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
574 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
575 return US ri->options[i].name;
576 }
577 }
578
579 for (t = transports; t; t = t->next)
580 {
581 transport_info *ti = t->info;
582 for (i = 0; i < *ti->options_count; i++)
583 {
584 optionlist * op = &ti->options[i];
585 if ((op->type & opt_mask) != opt_stringptr) continue;
586 if (p == ( op->type & opt_public
587 ? CS t
588 : CS t->options_block
589 )
590 + (long int)op->value)
591 return US op->name;
592 }
593 }
594
595 return US"";
596 }
597
598
599
600
601 /*************************************************
602 * Deal with an assignment to a macro *
603 *************************************************/
604
605 /* We have a new definition; append to the list.
606
607 Args:
608 name Name of the macro; will be copied
609 val Expansion result for the macro; will be copied
610 */
611
612 macro_item *
613 macro_create(const uschar * name, const uschar * val, BOOL command_line)
614 {
615 macro_item * m = store_get(sizeof(macro_item));
616
617 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val); */
618 m->next = NULL;
619 m->command_line = command_line;
620 m->namelen = Ustrlen(name);
621 m->replen = Ustrlen(val);
622 m->name = string_copy(name);
623 m->replacement = string_copy(val);
624 if (mlast)
625 mlast->next = m;
626 else
627 macros = m;
628 mlast = m;
629 if (!macros_user)
630 macros_user = m;
631 return m;
632 }
633
634
635 /* This function is called when a line that starts with an upper case letter is
636 encountered. The argument "line" should contain a complete logical line, and
637 start with the first letter of the macro name. The macro name and the
638 replacement text are extracted and stored. Redefinition of existing,
639 non-command line, macros is permitted using '==' instead of '='.
640
641 Arguments:
642 s points to the start of the logical line
643
644 Returns: FALSE iff fatal error
645 */
646
647 BOOL
648 macro_read_assignment(uschar *s)
649 {
650 uschar name[64];
651 int namelen = 0;
652 BOOL redef = FALSE;
653 macro_item *m;
654
655 while (isalnum(*s) || *s == '_')
656 {
657 if (namelen >= sizeof(name) - 1)
658 {
659 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
660 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
661 return FALSE;
662 }
663 name[namelen++] = *s++;
664 }
665 name[namelen] = 0;
666
667 while (isspace(*s)) s++;
668 if (*s++ != '=')
669 {
670 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
671 return FALSE;
672 }
673
674 if (*s == '=')
675 {
676 redef = TRUE;
677 s++;
678 }
679 while (isspace(*s)) s++;
680
681 /* If an existing macro of the same name was defined on the command line, we
682 just skip this definition. It's an error to attempt to redefine a macro without
683 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
684 It is also an error to define a macro whose name begins with the name of a
685 previously defined macro. This is the requirement that make using a tree
686 for macros hard; we must check all macros for the substring. Perhaps a
687 sorted list, and a bsearch, would work?
688 Note: it is documented that the other way round works. */
689
690 for (m = macros; m; m = m->next)
691 {
692 if (Ustrcmp(m->name, name) == 0)
693 {
694 if (!m->command_line && !redef)
695 {
696 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
697 "defined (use \"==\" if you want to redefine it)", name);
698 return FALSE;
699 }
700 break;
701 }
702
703 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
704 {
705 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
706 "a macro because previously defined macro \"%s\" is a substring",
707 name, m->name);
708 return FALSE;
709 }
710
711 /* We cannot have this test, because it is documented that a substring
712 macro is permitted (there is even an example).
713 *
714 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
715 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
716 * "a macro because it is a substring of previously defined macro \"%s\"",
717 * name, m->name);
718 */
719 }
720
721 /* Check for an overriding command-line definition. */
722
723 if (m && m->command_line) return TRUE;
724
725 /* Redefinition must refer to an existing macro. */
726
727 if (redef)
728 if (m)
729 {
730 m->replen = Ustrlen(s);
731 m->replacement = string_copy(s);
732 }
733 else
734 {
735 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
736 "\"%s\"", name);
737 return FALSE;
738 }
739
740 /* We have a new definition. */
741 else
742 (void) macro_create(name, s, FALSE);
743 return TRUE;
744 }
745
746
747
748
749
750 /* Process line for macros. The line is in big_buffer starting at offset len.
751 Expand big_buffer if needed. Handle definitions of new macros, and
752 macro expansions, rewriting the line in the buffer.
753
754 Arguments:
755 len Offset in buffer of start of line
756 newlen Pointer to offset of end of line, updated on return
757 macro_found Pointer to return that a macro was expanded
758
759 Return: pointer to first nonblank char in line
760 */
761
762 uschar *
763 macros_expand(int len, int * newlen, BOOL * macro_found)
764 {
765 uschar * ss = big_buffer + len;
766 uschar * s;
767 macro_item * m;
768
769 /* Find the true start of the physical line - leading spaces are always
770 ignored. */
771
772 while (isspace(*ss)) ss++;
773
774 /* Process the physical line for macros. If this is the start of the logical
775 line, skip over initial text at the start of the line if it starts with an
776 upper case character followed by a sequence of name characters and an equals
777 sign, because that is the definition of a new macro, and we don't do
778 replacement therein. */
779
780 s = ss;
781 if (len == 0 && isupper(*s))
782 {
783 while (isalnum(*s) || *s == '_') s++;
784 while (isspace(*s)) s++;
785 if (*s != '=') s = ss; /* Not a macro definition */
786 }
787
788 /* Skip leading chars which cannot start a macro name, to avoid multiple
789 pointless rescans in Ustrstr calls. */
790
791 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
792
793 /* For each defined macro, scan the line (from after XXX= if present),
794 replacing all occurrences of the macro. */
795
796 *macro_found = FALSE;
797 if (*s) for (m = *s == '_' ? macros : macros_user; m; m = m->next)
798 {
799 uschar * p, *pp;
800 uschar * t;
801
802 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
803 if (!*s) break;
804
805 t = s;
806 while ((p = Ustrstr(t, m->name)) != NULL)
807 {
808 int moveby;
809
810 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, ss); */
811 /* Expand the buffer if necessary */
812
813 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
814 {
815 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
816 uschar *newbuffer = store_malloc(newsize);
817 memcpy(newbuffer, big_buffer, *newlen + 1);
818 p = newbuffer + (p - big_buffer);
819 s = newbuffer + (s - big_buffer);
820 ss = newbuffer + (ss - big_buffer);
821 t = newbuffer + (t - big_buffer);
822 big_buffer_size = newsize;
823 store_free(big_buffer);
824 big_buffer = newbuffer;
825 }
826
827 /* Shuffle the remaining characters up or down in the buffer before
828 copying in the replacement text. Don't rescan the replacement for this
829 same macro. */
830
831 pp = p + m->namelen;
832 if ((moveby = m->replen - m->namelen) != 0)
833 {
834 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
835 *newlen += moveby;
836 }
837 Ustrncpy(p, m->replacement, m->replen);
838 t = p + m->replen;
839 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
840 *macro_found = TRUE;
841 }
842 }
843
844 /* An empty macro replacement at the start of a line could mean that ss no
845 longer points to the first non-blank character. */
846
847 while (isspace(*ss)) ss++;
848 return ss;
849 }
850
851 /*************************************************
852 * Read configuration line *
853 *************************************************/
854
855 /* A logical line of text is read from the configuration file into the big
856 buffer, taking account of macros, .includes, and continuations. The size of
857 big_buffer is increased if necessary. The count of configuration lines is
858 maintained. Physical input lines starting with # (ignoring leading white space,
859 and after macro replacement) and empty logical lines are always ignored.
860 Leading and trailing spaces are removed.
861
862 If we hit a line of the form "begin xxxx", the xxxx is placed in the
863 next_section vector, and the function returns NULL, indicating the end of a
864 configuration section. On end-of-file, NULL is returned with next_section
865 empty.
866
867 Arguments: none
868
869 Returns: a pointer to the first non-blank in the line,
870 or NULL if eof or end of section is reached
871 */
872
873 static uschar *
874 get_config_line(void)
875 {
876 int startoffset = 0; /* To first non-blank char in logical line */
877 int len = 0; /* Of logical line so far */
878 int newlen;
879 uschar *s, *ss;
880 BOOL macro_found;
881
882 /* Loop for handling continuation lines, skipping comments, and dealing with
883 .include files. */
884
885 for (;;)
886 {
887 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
888 {
889 if (config_file_stack != NULL) /* EOF inside .include */
890 {
891 (void)fclose(config_file);
892 config_file = config_file_stack->file;
893 config_filename = config_file_stack->filename;
894 config_directory = config_file_stack->directory;
895 config_lineno = config_file_stack->lineno;
896 config_file_stack = config_file_stack->next;
897 if (config_lines)
898 save_config_position(config_filename, config_lineno);
899 continue;
900 }
901
902 /* EOF at top level */
903
904 if (cstate_stack_ptr >= 0)
905 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
906 "Unexpected end of configuration file: .endif missing");
907
908 if (len != 0) break; /* EOF after continuation */
909 next_section[0] = 0; /* EOF at start of logical line */
910 return NULL;
911 }
912
913 config_lineno++;
914 newlen = len + Ustrlen(big_buffer + len);
915
916 if (config_lines && config_lineno == 1)
917 save_config_position(config_filename, config_lineno);
918
919 /* Handle pathologically long physical lines - yes, it did happen - by
920 extending big_buffer at this point. The code also copes with very long
921 logical lines. */
922
923 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
924 {
925 uschar *newbuffer;
926 big_buffer_size += BIG_BUFFER_SIZE;
927 newbuffer = store_malloc(big_buffer_size);
928
929 /* This use of strcpy is OK because we know that the string in the old
930 buffer is shorter than the new buffer. */
931
932 Ustrcpy(newbuffer, big_buffer);
933 store_free(big_buffer);
934 big_buffer = newbuffer;
935 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
936 break;
937 newlen += Ustrlen(big_buffer + newlen);
938 }
939
940 ss = macros_expand(len, &newlen, &macro_found);
941
942 /* Check for comment lines - these are physical lines. */
943
944 if (*ss == '#') continue;
945
946 /* Handle conditionals, which are also applied to physical lines. Conditions
947 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
948 expansion occured on the rest of the line. A preliminary test for the leading
949 '.' saves effort on most lines. */
950
951 if (*ss == '.')
952 {
953 int i;
954
955 /* Search the list of conditional directives */
956
957 for (i = 0; i < cond_list_size; i++)
958 {
959 int n;
960 cond_item *c = cond_list+i;
961 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
962
963 /* The following character must be white space or end of string */
964
965 n = ss[1 + c->namelen];
966 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
967
968 /* .ifdef and .ifndef push the current state onto the stack, then set
969 a new one from the table. Stack overflow is an error */
970
971 if (c->pushpop > 0)
972 {
973 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
974 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
975 ".%s nested too deeply", c->name);
976 cstate_stack[++cstate_stack_ptr] = cstate;
977 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
978 }
979
980 /* For any of the others, stack underflow is an error. The next state
981 comes either from the stack (.endif) or from the table. */
982
983 else
984 {
985 if (cstate_stack_ptr < 0)
986 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
987 ".%s without matching .ifdef", c->name);
988 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
989 next_cstate[cstate][macro_found? c->action1 : c->action2];
990 }
991
992 /* Having dealt with a directive, break the loop */
993
994 break;
995 }
996
997 /* If we have handled a conditional directive, continue with the next
998 physical line. Otherwise, fall through. */
999
1000 if (i < cond_list_size) continue;
1001 }
1002
1003 /* If the conditional state is not 0 (actively using these lines), ignore
1004 this input line. */
1005
1006 if (cstate != 0) continue; /* Conditional skip */
1007
1008 /* Handle .include lines - these are also physical lines. */
1009
1010 if (Ustrncmp(ss, ".include", 8) == 0 &&
1011 (isspace(ss[8]) ||
1012 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1013 {
1014 uschar *t;
1015 int include_if_exists = isspace(ss[8])? 0 : 10;
1016 config_file_item *save;
1017 struct stat statbuf;
1018
1019 ss += 9 + include_if_exists;
1020 while (isspace(*ss)) ss++;
1021 t = ss + Ustrlen(ss);
1022 while (t > ss && isspace(t[-1])) t--;
1023 if (*ss == '\"' && t[-1] == '\"')
1024 {
1025 ss++;
1026 t--;
1027 }
1028 *t = 0;
1029
1030 /* We allow relative file names. For security reasons currently
1031 relative names not allowed with .include_if_exists. For .include_if_exists
1032 we need to check the permissions/ownership of the containing folder */
1033 if (*ss != '/')
1034 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1035 "absolute path \"%s\"", ss);
1036 else
1037 {
1038 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1039 ss = string_from_gstring(g);
1040 }
1041
1042 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1043
1044 if (config_lines)
1045 save_config_position(config_filename, config_lineno);
1046 save = store_get(sizeof(config_file_item));
1047 save->next = config_file_stack;
1048 config_file_stack = save;
1049 save->file = config_file;
1050 save->filename = config_filename;
1051 save->directory = config_directory;
1052 save->lineno = config_lineno;
1053
1054 if (!(config_file = Ufopen(ss, "rb")))
1055 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1056 "configuration file %s", ss);
1057
1058 config_filename = string_copy(ss);
1059 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1060 config_lineno = 0;
1061 continue;
1062 }
1063
1064 /* If this is the start of the logical line, remember where the non-blank
1065 data starts. Otherwise shuffle down continuation lines to remove leading
1066 white space. */
1067
1068 if (len == 0)
1069 startoffset = ss - big_buffer;
1070 else
1071 {
1072 s = big_buffer + len;
1073 if (ss > s)
1074 {
1075 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1076 newlen -= ss - s;
1077 }
1078 }
1079
1080 /* Accept the new addition to the line. Remove trailing white space. */
1081
1082 len = newlen;
1083 while (len > 0 && isspace(big_buffer[len-1])) len--;
1084 big_buffer[len] = 0;
1085
1086 /* We are done if the line does not end in backslash and contains some data.
1087 Empty logical lines are ignored. For continuations, remove the backslash and
1088 go round the loop to read the continuation line. */
1089
1090 if (len > 0)
1091 {
1092 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1093 big_buffer[--len] = 0; /* Remove backslash */
1094 }
1095 } /* Loop for reading multiple physical lines */
1096
1097 /* We now have a logical line. Test for the end of a configuration section (or,
1098 more accurately, for the start of the next section). Place the name of the next
1099 section in next_section, and return NULL. If the name given is longer than
1100 next_section, truncate it. It will be unrecognized later, because all the known
1101 section names do fit. Leave space for pluralizing. */
1102
1103 s = big_buffer + startoffset; /* First non-space character */
1104
1105 if (config_lines)
1106 save_config_line(s);
1107
1108 if (strncmpic(s, US"begin ", 6) == 0)
1109 {
1110 s += 6;
1111 while (isspace(*s)) s++;
1112 if (big_buffer + len - s > sizeof(next_section) - 2)
1113 s[sizeof(next_section) - 2] = 0;
1114 Ustrcpy(next_section, s);
1115 return NULL;
1116 }
1117
1118 /* Return the first non-blank character. */
1119
1120 return s;
1121 }
1122
1123
1124
1125 /*************************************************
1126 * Read a name *
1127 *************************************************/
1128
1129 /* The yield is the pointer to the next uschar. Names longer than the
1130 output space are silently truncated. This function is also used from acl.c when
1131 parsing ACLs.
1132
1133 Arguments:
1134 name where to put the name
1135 len length of name
1136 s input pointer
1137
1138 Returns: new input pointer
1139 */
1140
1141 uschar *
1142 readconf_readname(uschar *name, int len, uschar *s)
1143 {
1144 int p = 0;
1145 while (isspace(*s)) s++;
1146 if (isalpha(*s))
1147 {
1148 while (isalnum(*s) || *s == '_')
1149 {
1150 if (p < len-1) name[p++] = *s;
1151 s++;
1152 }
1153 }
1154 name[p] = 0;
1155 while (isspace(*s)) s++;
1156 return s;
1157 }
1158
1159
1160
1161
1162 /*************************************************
1163 * Read a time value *
1164 *************************************************/
1165
1166 /* This function is also called from outside, to read argument
1167 time values. The format of a time value is:
1168
1169 [<n>w][<n>d][<n>h][<n>m][<n>s]
1170
1171 as long as at least one is present. If a format error is encountered,
1172 return a negative value. The value must be terminated by the given
1173 terminator.
1174
1175 Arguments:
1176 s input pointer
1177 terminator required terminating character
1178 return_msec if TRUE, allow fractional seconds and return milliseconds
1179
1180 Returns: the time value, or -1 on syntax error
1181 value is seconds if return_msec is FALSE
1182 value is milliseconds if return_msec is TRUE
1183 */
1184
1185 int
1186 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1187 {
1188 int yield = 0;
1189 for (;;)
1190 {
1191 int value, count;
1192 double fraction;
1193
1194 if (!isdigit(*s)) return -1;
1195 (void)sscanf(CCS s, "%d%n", &value, &count);
1196 s += count;
1197
1198 switch (*s)
1199 {
1200 case 'w': value *= 7;
1201 case 'd': value *= 24;
1202 case 'h': value *= 60;
1203 case 'm': value *= 60;
1204 case 's': s++;
1205 break;
1206
1207 case '.':
1208 if (!return_msec) return -1;
1209 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1210 s += count;
1211 if (*s++ != 's') return -1;
1212 yield += (int)(fraction * 1000.0);
1213 break;
1214
1215 default: return -1;
1216 }
1217
1218 if (return_msec) value *= 1000;
1219 yield += value;
1220 if (*s == terminator) return yield;
1221 }
1222 /* Control never reaches here. */
1223 }
1224
1225
1226
1227 /*************************************************
1228 * Read a fixed point value *
1229 *************************************************/
1230
1231 /* The value is returned *1000
1232
1233 Arguments:
1234 s input pointer
1235 terminator required terminator
1236
1237 Returns: the value, or -1 on error
1238 */
1239
1240 static int
1241 readconf_readfixed(const uschar *s, int terminator)
1242 {
1243 int yield = 0;
1244 int value, count;
1245 if (!isdigit(*s)) return -1;
1246 (void)sscanf(CS s, "%d%n", &value, &count);
1247 s += count;
1248 yield = value * 1000;
1249 if (*s == '.')
1250 {
1251 int m = 100;
1252 while (isdigit((*(++s))))
1253 {
1254 yield += (*s - '0') * m;
1255 m /= 10;
1256 }
1257 }
1258
1259 return (*s == terminator)? yield : (-1);
1260 }
1261
1262
1263
1264 /*************************************************
1265 * Find option in list *
1266 *************************************************/
1267
1268 /* The lists are always in order, so binary chop can be used.
1269
1270 Arguments:
1271 name the option name to search for
1272 ol the first entry in the option list
1273 last one more than the offset of the last entry in the option list
1274
1275 Returns: pointer to an option entry, or NULL if not found
1276 */
1277
1278 static optionlist *
1279 find_option(uschar *name, optionlist *ol, int last)
1280 {
1281 int first = 0;
1282 while (last > first)
1283 {
1284 int middle = (first + last)/2;
1285 int c = Ustrcmp(name, ol[middle].name);
1286
1287 if (c == 0) return ol + middle;
1288 else if (c > 0) first = middle + 1;
1289 else last = middle;
1290 }
1291 return NULL;
1292 }
1293
1294
1295
1296 /*************************************************
1297 * Find a set flag in option list *
1298 *************************************************/
1299
1300 /* Because some versions of Unix make no restrictions on the values of uids and
1301 gids (even negative ones), we cannot represent "unset" by a special value.
1302 There is therefore a separate boolean variable for each one indicating whether
1303 a value is set or not. This function returns a pointer to the boolean, given
1304 the original option name. It is a major disaster if the flag cannot be found.
1305
1306 Arguments:
1307 name the name of the uid or gid option
1308 oltop points to the start of the relevant option list
1309 last one more than the offset of the last item in the option list
1310 data_block NULL when reading main options => data values in the option
1311 list are absolute addresses; otherwise they are byte offsets
1312 in data_block (used for driver options)
1313
1314 Returns: a pointer to the boolean flag.
1315 */
1316
1317 static BOOL *
1318 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1319 {
1320 optionlist *ol;
1321 uschar name2[64];
1322 sprintf(CS name2, "*set_%.50s", name);
1323 ol = find_option(name2, oltop, last);
1324 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1325 "Exim internal error: missing set flag for %s", name);
1326 return (data_block == NULL)? (BOOL *)(ol->value) :
1327 (BOOL *)(US data_block + (long int)(ol->value));
1328 }
1329
1330
1331
1332
1333 /*************************************************
1334 * Output extra characters message and die *
1335 *************************************************/
1336
1337 /* Called when an option line has junk on the end. Sometimes this is because
1338 the sysadmin thinks comments are permitted.
1339
1340 Arguments:
1341 s points to the extra characters
1342 t1..t3 strings to insert in the log message
1343
1344 Returns: doesn't return; dies
1345 */
1346
1347 static void
1348 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1349 {
1350 uschar *comment = US"";
1351 if (*s == '#') comment = US" (# is comment only at line start)";
1352 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1353 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1354 }
1355
1356
1357
1358 /*************************************************
1359 * Read rewrite information *
1360 *************************************************/
1361
1362 /* Each line of rewrite information contains:
1363
1364 . A complete address in the form user@domain, possibly with
1365 leading * for each part; or alternatively, a regex.
1366
1367 . A replacement string (which will be expanded).
1368
1369 . An optional sequence of one-letter flags, indicating which
1370 headers etc. to apply this rule to.
1371
1372 All this is decoded and placed into a control block. The OR of the flags is
1373 maintained in a common word.
1374
1375 Arguments:
1376 p points to the string that makes up the rule
1377 existflags points to the overall flag word
1378 isglobal TRUE if reading global rewrite rules
1379
1380 Returns: the control block for the parsed rule.
1381 */
1382
1383 static rewrite_rule *
1384 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1385 {
1386 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1387
1388 next->next = NULL;
1389 next->key = string_dequote(&p);
1390
1391 while (isspace(*p)) p++;
1392 if (*p == 0)
1393 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1394 "missing rewrite replacement string");
1395
1396 next->flags = 0;
1397 next->replacement = string_dequote(&p);
1398
1399 while (*p != 0) switch (*p++)
1400 {
1401 case ' ': case '\t': break;
1402
1403 case 'q': next->flags |= rewrite_quit; break;
1404 case 'w': next->flags |= rewrite_whole; break;
1405
1406 case 'h': next->flags |= rewrite_all_headers; break;
1407 case 's': next->flags |= rewrite_sender; break;
1408 case 'f': next->flags |= rewrite_from; break;
1409 case 't': next->flags |= rewrite_to; break;
1410 case 'c': next->flags |= rewrite_cc; break;
1411 case 'b': next->flags |= rewrite_bcc; break;
1412 case 'r': next->flags |= rewrite_replyto; break;
1413
1414 case 'E': next->flags |= rewrite_all_envelope; break;
1415 case 'F': next->flags |= rewrite_envfrom; break;
1416 case 'T': next->flags |= rewrite_envto; break;
1417
1418 case 'Q': next->flags |= rewrite_qualify; break;
1419 case 'R': next->flags |= rewrite_repeat; break;
1420
1421 case 'S':
1422 next->flags |= rewrite_smtp;
1423 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1424 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1425 "rewrite rule has the S flag but is not a regular expression");
1426 break;
1427
1428 default:
1429 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1430 "unknown rewrite flag character '%c' "
1431 "(could be missing quotes round replacement item)", p[-1]);
1432 break;
1433 }
1434
1435 /* If no action flags are set, set all the "normal" rewrites. */
1436
1437 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1438 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1439
1440 /* Remember which exist, for optimization, and return the rule */
1441
1442 *existflags |= next->flags;
1443 return next;
1444 }
1445
1446
1447
1448
1449 /*************************************************
1450 * Read global rewrite information *
1451 *************************************************/
1452
1453 /* Each line is a single rewrite rule; it is parsed into a control block
1454 by readconf_one_rewrite(), and its flags are ORed into the global flag
1455 word rewrite_existflags. */
1456
1457 void
1458 readconf_rewrites(void)
1459 {
1460 rewrite_rule **chain = &global_rewrite_rules;
1461 uschar *p;
1462
1463 while ((p = get_config_line()) != NULL)
1464 {
1465 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1466 *chain = next;
1467 chain = &(next->next);
1468 }
1469 }
1470
1471
1472
1473 /*************************************************
1474 * Read a string *
1475 *************************************************/
1476
1477 /* Strings are read into the normal store pool. As long we aren't too
1478 near the end of the current block, the string will just use what is necessary
1479 on the top of the stacking pool, because string_cat() uses the extension
1480 mechanism.
1481
1482 Argument:
1483 s the rest of the input line
1484 name the option name (for errors)
1485
1486 Returns: pointer to the string
1487 */
1488
1489 static uschar *
1490 read_string(const uschar *s, const uschar *name)
1491 {
1492 uschar *yield;
1493 const uschar *ss;
1494
1495 if (*s != '\"') return string_copy(s);
1496
1497 ss = s;
1498 yield = string_dequote(&s);
1499
1500 if (s == ss+1 || s[-1] != '\"')
1501 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1502 "missing quote at end of string value for %s", name);
1503
1504 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1505
1506 return yield;
1507 }
1508
1509
1510 /*************************************************
1511 * Custom-handler options *
1512 *************************************************/
1513 static void
1514 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1515 {
1516 if (*str == '$')
1517 smtp_receive_timeout_s = string_copy(str);
1518 else
1519 {
1520 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1521 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1522 if (smtp_receive_timeout < 0)
1523 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1524 name);
1525 }
1526 }
1527
1528 /*************************************************
1529 * Handle option line *
1530 *************************************************/
1531
1532 /* This function is called from several places to process a line containing the
1533 setting of an option. The first argument is the line to be decoded; it has been
1534 checked not to be empty and not to start with '#'. Trailing newlines and white
1535 space have been removed. The second argument is a pointer to the list of
1536 variable names that are to be recognized, together with their types and
1537 locations, and the third argument gives the number of entries in the list.
1538
1539 The fourth argument is a pointer to a data block. If it is NULL, then the data
1540 values in the options list are absolute addresses. Otherwise, they are byte
1541 offsets in the data block.
1542
1543 String option data may continue onto several lines; this function reads further
1544 data from config_file if necessary.
1545
1546 The yield of this function is normally zero. If a string continues onto
1547 multiple lines, then the data value is permitted to be followed by a comma
1548 or a semicolon (for use in drivers) and the yield is that character.
1549
1550 Arguments:
1551 buffer contains the configuration line to be handled
1552 oltop points to the start of the relevant option list
1553 last one more than the offset of the last item in the option list
1554 data_block NULL when reading main options => data values in the option
1555 list are absolute addresses; otherwise they are byte offsets
1556 in data_block when they have opt_public set; otherwise
1557 they are byte offsets in data_block->options_block.
1558 unknown_txt format string to use in panic message for unknown option;
1559 must contain %s for option name
1560 if given as NULL, don't panic on unknown option
1561
1562 Returns: TRUE if an option was read successfully,
1563 FALSE false for an unknown option if unknown_txt == NULL,
1564 otherwise panic and die on an unknown option
1565 */
1566
1567 static BOOL
1568 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1569 void *data_block, uschar *unknown_txt)
1570 {
1571 int ptr = 0;
1572 int offset = 0;
1573 int n, count, type, value;
1574 int issecure = 0;
1575 uid_t uid;
1576 gid_t gid;
1577 BOOL boolvalue = TRUE;
1578 BOOL freesptr = TRUE;
1579 optionlist *ol, *ol2;
1580 struct passwd *pw;
1581 void *reset_point;
1582 int intbase = 0;
1583 uschar *inttype = US"";
1584 uschar *sptr;
1585 uschar *s = buffer;
1586 uschar **str_target;
1587 uschar name[64];
1588 uschar name2[64];
1589
1590 /* There may be leading spaces; thereafter, we expect an option name starting
1591 with a letter. */
1592
1593 while (isspace(*s)) s++;
1594 if (!isalpha(*s))
1595 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1596
1597 /* Read the name of the option, and skip any subsequent white space. If
1598 it turns out that what we read was "hide", set the flag indicating that
1599 this is a secure option, and loop to read the next word. */
1600
1601 for (n = 0; n < 2; n++)
1602 {
1603 while (isalnum(*s) || *s == '_')
1604 {
1605 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1606 s++;
1607 }
1608 name[ptr] = 0;
1609 while (isspace(*s)) s++;
1610 if (Ustrcmp(name, "hide") != 0) break;
1611 issecure = opt_secure;
1612 ptr = 0;
1613 }
1614
1615 /* Deal with "no_" or "not_" here for booleans */
1616
1617 if (Ustrncmp(name, "no_", 3) == 0)
1618 {
1619 boolvalue = FALSE;
1620 offset = 3;
1621 }
1622
1623 if (Ustrncmp(name, "not_", 4) == 0)
1624 {
1625 boolvalue = FALSE;
1626 offset = 4;
1627 }
1628
1629 /* Search the list for the given name. A non-existent name, or an option that
1630 is set twice, is a disaster. */
1631
1632 if (!(ol = find_option(name + offset, oltop, last)))
1633 {
1634 if (unknown_txt == NULL) return FALSE;
1635 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1636 }
1637
1638 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1639 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1640 "\"%s\" option set for the second time", name);
1641
1642 ol->type |= opt_set | issecure;
1643 type = ol->type & opt_mask;
1644
1645 /* Types with data values must be followed by '='; the "no[t]_" prefix
1646 applies only to boolean values. */
1647
1648 if (type < opt_bool || type > opt_bool_last)
1649 {
1650 if (offset != 0)
1651 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1652 "negation prefix applied to a non-boolean option");
1653 if (*s == 0)
1654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1655 "unexpected end of line (data missing) after %s", name);
1656 if (*s != '=')
1657 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1658 }
1659
1660 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1661 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1662 ultimately expands to one of those values. */
1663
1664 else if (*s != 0 && (offset != 0 || *s != '='))
1665 extra_chars_error(s, US"boolean option ", name, US"");
1666
1667 /* Skip white space after = */
1668
1669 if (*s == '=') while (isspace((*(++s))));
1670
1671 /* If there is a data block and the opt_public flag is not set, change
1672 the data block pointer to the private options block. */
1673
1674 if (data_block != NULL && (ol->type & opt_public) == 0)
1675 data_block = (void *)(((driver_instance *)data_block)->options_block);
1676
1677 /* Now get the data according to the type. */
1678
1679 switch (type)
1680 {
1681 /* If a string value is not enclosed in quotes, it consists of
1682 the rest of the current line, verbatim. Otherwise, string escapes
1683 are processed.
1684
1685 A transport is specified as a string, which is then looked up in the
1686 list of transports. A search type is specified as one of a number of
1687 known strings.
1688
1689 A set or rewrite rules for a driver is specified as a string, which is
1690 then parsed into a suitable chain of control blocks.
1691
1692 Uids and gids are specified as strings which are then looked up in the
1693 passwd file. Lists of uids and gids are similarly specified as colon-
1694 separated strings. */
1695
1696 case opt_stringptr:
1697 case opt_uid:
1698 case opt_gid:
1699 case opt_expand_uid:
1700 case opt_expand_gid:
1701 case opt_uidlist:
1702 case opt_gidlist:
1703 case opt_rewrite:
1704
1705 reset_point = sptr = read_string(s, name);
1706
1707 /* Having read a string, we now have several different ways of using it,
1708 depending on the data type, so do another switch. If keeping the actual
1709 string is not required (because it is interpreted), freesptr is set TRUE,
1710 and at the end we reset the pool. */
1711
1712 switch (type)
1713 {
1714 /* If this was a string, set the variable to point to the new string,
1715 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1716 rules, we still keep the string (for printing), and parse the rules into a
1717 control block and flags word. */
1718
1719 case opt_stringptr:
1720 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1721 : USS (ol->value);
1722 if (ol->type & opt_rep_con)
1723 {
1724 uschar * saved_condition;
1725 /* We already have a condition, we're conducting a crude hack to let
1726 multiple condition rules be chained together, despite storing them in
1727 text form. */
1728 *str_target = string_copy_malloc( (saved_condition = *str_target)
1729 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1730 saved_condition, sptr)
1731 : sptr);
1732 /* TODO(pdp): there is a memory leak here and just below
1733 when we set 3 or more conditions; I still don't
1734 understand the store mechanism enough to know
1735 what's the safe way to free content from an earlier store.
1736 AFAICT, stores stack, so freeing an early stored item also stores
1737 all data alloc'd after it. If we knew conditions were adjacent,
1738 we could survive that, but we don't. So I *think* we need to take
1739 another bit from opt_type to indicate "malloced"; this seems like
1740 quite a hack, especially for this one case. It also means that
1741 we can't ever reclaim the store from the *first* condition.
1742
1743 Because we only do this once, near process start-up, I'm prepared to
1744 let this slide for the time being, even though it rankles. */
1745 }
1746 else if (ol->type & opt_rep_str)
1747 {
1748 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1749 int sep_i = -(int)sep_o;
1750 const uschar * list = sptr;
1751 uschar * s;
1752 gstring * list_o = NULL;
1753
1754 if (*str_target)
1755 {
1756 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1757 list_o = string_cat(list_o, *str_target);
1758 }
1759
1760 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1761 list_o = string_append_listele(list_o, sep_o, s);
1762
1763 if (list_o)
1764 *str_target = string_copy_malloc(string_from_gstring(list_o));
1765 }
1766 else
1767 {
1768 *str_target = sptr;
1769 freesptr = FALSE;
1770 }
1771 break;
1772
1773 case opt_rewrite:
1774 if (data_block)
1775 *USS (US data_block + (long int)(ol->value)) = sptr;
1776 else
1777 *USS (ol->value) = sptr;
1778 freesptr = FALSE;
1779 if (type == opt_rewrite)
1780 {
1781 int sep = 0;
1782 int *flagptr;
1783 uschar *p = sptr;
1784 rewrite_rule **chain;
1785 optionlist *ol3;
1786
1787 sprintf(CS name2, "*%.50s_rules", name);
1788 ol2 = find_option(name2, oltop, last);
1789 sprintf(CS name2, "*%.50s_flags", name);
1790 ol3 = find_option(name2, oltop, last);
1791
1792 if (ol2 == NULL || ol3 == NULL)
1793 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1794 "rewrite rules not available for driver");
1795
1796 if (data_block == NULL)
1797 {
1798 chain = (rewrite_rule **)(ol2->value);
1799 flagptr = (int *)(ol3->value);
1800 }
1801 else
1802 {
1803 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1804 flagptr = (int *)(US data_block + (long int)(ol3->value));
1805 }
1806
1807 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1808 {
1809 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1810 *chain = next;
1811 chain = &(next->next);
1812 }
1813
1814 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1815 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1816 "non-header rewrite - not allowed at transport time -");
1817 }
1818 break;
1819
1820 /* If it was an expanded uid, see if there is any expansion to be
1821 done by checking for the presence of a $ character. If there is, save it
1822 in the corresponding *expand_user option field. Otherwise, fall through
1823 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1824 of data. */
1825
1826 case opt_expand_uid:
1827 sprintf(CS name2, "*expand_%.50s", name);
1828 ol2 = find_option(name2, oltop, last);
1829 if (ol2 != NULL)
1830 {
1831 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1832
1833 if (data_block == NULL)
1834 *((uschar **)(ol2->value)) = ss;
1835 else
1836 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1837
1838 if (ss != NULL)
1839 {
1840 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1841 freesptr = FALSE;
1842 break;
1843 }
1844 }
1845
1846 /* Look up a fixed uid, and also make use of the corresponding gid
1847 if a passwd entry is returned and the gid has not been set. */
1848
1849 case opt_uid:
1850 if (!route_finduser(sptr, &pw, &uid))
1851 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1852 if (data_block == NULL)
1853 *((uid_t *)(ol->value)) = uid;
1854 else
1855 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1856
1857 /* Set the flag indicating a fixed value is set */
1858
1859 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1860
1861 /* Handle matching gid if we have a passwd entry: done by finding the
1862 same name with terminating "user" changed to "group"; if not found,
1863 ignore. Also ignore if the value is already set. */
1864
1865 if (pw == NULL) break;
1866 Ustrcpy(name+Ustrlen(name)-4, "group");
1867 ol2 = find_option(name, oltop, last);
1868 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1869 (ol2->type & opt_mask) == opt_expand_gid))
1870 {
1871 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1872 if (! *set_flag)
1873 {
1874 if (data_block == NULL)
1875 *((gid_t *)(ol2->value)) = pw->pw_gid;
1876 else
1877 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1878 *set_flag = TRUE;
1879 }
1880 }
1881 break;
1882
1883 /* If it was an expanded gid, see if there is any expansion to be
1884 done by checking for the presence of a $ character. If there is, save it
1885 in the corresponding *expand_user option field. Otherwise, fall through
1886 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1887 of data. */
1888
1889 case opt_expand_gid:
1890 sprintf(CS name2, "*expand_%.50s", name);
1891 ol2 = find_option(name2, oltop, last);
1892 if (ol2 != NULL)
1893 {
1894 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1895
1896 if (data_block == NULL)
1897 *((uschar **)(ol2->value)) = ss;
1898 else
1899 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1900
1901 if (ss != NULL)
1902 {
1903 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1904 freesptr = FALSE;
1905 break;
1906 }
1907 }
1908
1909 /* Handle freestanding gid */
1910
1911 case opt_gid:
1912 if (!route_findgroup(sptr, &gid))
1913 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1914 if (data_block == NULL)
1915 *((gid_t *)(ol->value)) = gid;
1916 else
1917 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1918 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1919 break;
1920
1921 /* If it was a uid list, look up each individual entry, and build
1922 a vector of uids, with a count in the first element. Put the vector
1923 in malloc store so we can free the string. (We are reading into
1924 permanent store already.) */
1925
1926 case opt_uidlist:
1927 {
1928 int count = 1;
1929 uid_t *list;
1930 int ptr = 0;
1931 const uschar *p;
1932 const uschar *op = expand_string (sptr);
1933
1934 if (op == NULL)
1935 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1936 name, expand_string_message);
1937
1938 p = op;
1939 if (*p != 0) count++;
1940 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1941 list = store_malloc(count*sizeof(uid_t));
1942 list[ptr++] = (uid_t)(count - 1);
1943
1944 if (data_block == NULL)
1945 *((uid_t **)(ol->value)) = list;
1946 else
1947 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1948
1949 p = op;
1950 while (count-- > 1)
1951 {
1952 int sep = 0;
1953 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1954 if (!route_finduser(big_buffer, NULL, &uid))
1955 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1956 big_buffer);
1957 list[ptr++] = uid;
1958 }
1959 }
1960 break;
1961
1962 /* If it was a gid list, look up each individual entry, and build
1963 a vector of gids, with a count in the first element. Put the vector
1964 in malloc store so we can free the string. (We are reading into permanent
1965 store already.) */
1966
1967 case opt_gidlist:
1968 {
1969 int count = 1;
1970 gid_t *list;
1971 int ptr = 0;
1972 const uschar *p;
1973 const uschar *op = expand_string (sptr);
1974
1975 if (op == NULL)
1976 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1977 name, expand_string_message);
1978
1979 p = op;
1980 if (*p != 0) count++;
1981 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1982 list = store_malloc(count*sizeof(gid_t));
1983 list[ptr++] = (gid_t)(count - 1);
1984
1985 if (data_block == NULL)
1986 *((gid_t **)(ol->value)) = list;
1987 else
1988 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
1989
1990 p = op;
1991 while (count-- > 1)
1992 {
1993 int sep = 0;
1994 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1995 if (!route_findgroup(big_buffer, &gid))
1996 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1997 big_buffer);
1998 list[ptr++] = gid;
1999 }
2000 }
2001 break;
2002 }
2003
2004 /* Release store if the value of the string doesn't need to be kept. */
2005
2006 if (freesptr) store_reset(reset_point);
2007 break;
2008
2009 /* Expanded boolean: if no characters follow, or if there are no dollar
2010 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2011 save the string for later expansion in the alternate place. */
2012
2013 case opt_expand_bool:
2014 if (*s != 0 && Ustrchr(s, '$') != 0)
2015 {
2016 sprintf(CS name2, "*expand_%.50s", name);
2017 ol2 = find_option(name2, oltop, last);
2018 if (ol2 != NULL)
2019 {
2020 reset_point = sptr = read_string(s, name);
2021 if (data_block == NULL)
2022 *((uschar **)(ol2->value)) = sptr;
2023 else
2024 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2025 freesptr = FALSE;
2026 break;
2027 }
2028 }
2029 /* Fall through */
2030
2031 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2032 look for yes/not/true/false. Some booleans are stored in a single bit in
2033 a single int. There's a special fudge for verify settings; without a suffix
2034 they set both xx_sender and xx_recipient. The table points to the sender
2035 value; search subsequently for the recipient. There's another special case:
2036 opt_bool_set also notes when a boolean has been set. */
2037
2038 case opt_bool:
2039 case opt_bit:
2040 case opt_bool_verify:
2041 case opt_bool_set:
2042 if (*s != 0)
2043 {
2044 s = readconf_readname(name2, 64, s);
2045 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2046 boolvalue = TRUE;
2047 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2048 boolvalue = FALSE;
2049 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2050 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2051 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2052 US"for boolean option ", name);
2053 }
2054
2055 /* Handle single-bit type. */
2056
2057 if (type == opt_bit)
2058 {
2059 int bit = 1 << ((ol->type >> 16) & 31);
2060 int *ptr = (data_block == NULL)?
2061 (int *)(ol->value) :
2062 (int *)(US data_block + (long int)ol->value);
2063 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2064 break;
2065 }
2066
2067 /* Handle full BOOL types */
2068
2069 if (data_block == NULL)
2070 *((BOOL *)(ol->value)) = boolvalue;
2071 else
2072 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2073
2074 /* Verify fudge */
2075
2076 if (type == opt_bool_verify)
2077 {
2078 sprintf(CS name2, "%.50s_recipient", name + offset);
2079 ol2 = find_option(name2, oltop, last);
2080 if (ol2 != NULL)
2081 {
2082 if (data_block == NULL)
2083 *((BOOL *)(ol2->value)) = boolvalue;
2084 else
2085 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2086 }
2087 }
2088
2089 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2090
2091 else if (type == opt_bool_set)
2092 {
2093 sprintf(CS name2, "*set_%.50s", name + offset);
2094 ol2 = find_option(name2, oltop, last);
2095 if (ol2 != NULL)
2096 {
2097 if (data_block == NULL)
2098 *((BOOL *)(ol2->value)) = TRUE;
2099 else
2100 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2101 }
2102 }
2103 break;
2104
2105 /* Octal integer */
2106
2107 case opt_octint:
2108 intbase = 8;
2109 inttype = US"octal ";
2110
2111 /* Integer: a simple(ish) case; allow octal and hex formats, and
2112 suffixes K, M and G. The different types affect output, not input. */
2113
2114 case opt_mkint:
2115 case opt_int:
2116 {
2117 uschar *endptr;
2118 long int lvalue;
2119
2120 errno = 0;
2121 lvalue = strtol(CS s, CSS &endptr, intbase);
2122
2123 if (endptr == s)
2124 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2125 inttype, name);
2126
2127 if (errno != ERANGE)
2128 if (tolower(*endptr) == 'k')
2129 {
2130 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2131 else lvalue *= 1024;
2132 endptr++;
2133 }
2134 else if (tolower(*endptr) == 'm')
2135 {
2136 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2137 errno = ERANGE;
2138 else lvalue *= 1024*1024;
2139 endptr++;
2140 }
2141 else if (tolower(*endptr) == 'g')
2142 {
2143 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2144 errno = ERANGE;
2145 else lvalue *= 1024*1024*1024;
2146 endptr++;
2147 }
2148
2149 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2150 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2151 "absolute value of integer \"%s\" is too large (overflow)", s);
2152
2153 while (isspace(*endptr)) endptr++;
2154 if (*endptr != 0)
2155 extra_chars_error(endptr, inttype, US"integer value for ", name);
2156
2157 value = (int)lvalue;
2158 }
2159
2160 if (data_block == NULL)
2161 *((int *)(ol->value)) = value;
2162 else
2163 *((int *)(US data_block + (long int)(ol->value))) = value;
2164 break;
2165
2166 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2167 and G. */
2168 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2169
2170 case opt_Kint:
2171 {
2172 uschar *endptr;
2173 errno = 0;
2174 value = strtol(CS s, CSS &endptr, intbase);
2175
2176 if (endptr == s)
2177 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2178 inttype, name);
2179
2180 if (errno != ERANGE)
2181 if (tolower(*endptr) == 'g')
2182 {
2183 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2184 errno = ERANGE;
2185 else
2186 value *= 1024*1024;
2187 endptr++;
2188 }
2189 else if (tolower(*endptr) == 'm')
2190 {
2191 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2192 errno = ERANGE;
2193 else
2194 value *= 1024;
2195 endptr++;
2196 }
2197 else if (tolower(*endptr) == 'k')
2198 endptr++;
2199 else
2200 value = (value + 512)/1024;
2201
2202 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2203 "absolute value of integer \"%s\" is too large (overflow)", s);
2204
2205 while (isspace(*endptr)) endptr++;
2206 if (*endptr != 0)
2207 extra_chars_error(endptr, inttype, US"integer value for ", name);
2208 }
2209
2210 if (data_block == NULL)
2211 *((int *)(ol->value)) = value;
2212 else
2213 *((int *)(US data_block + (long int)(ol->value))) = value;
2214 break;
2215
2216 /* Fixed-point number: held to 3 decimal places. */
2217
2218 case opt_fixed:
2219 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2220 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2221 "fixed-point number expected for %s", name);
2222
2223 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2224 "integer \"%s\" is too large (overflow)", s);
2225
2226 value *= 1000;
2227
2228 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2229 "integer \"%s\" is too large (overflow)", s);
2230
2231 /* We get a coverity error here for using count, as it derived
2232 from the tainted buffer pointed to by s, as parsed by sscanf().
2233 By the definition of sscanf we must be accessing between start
2234 and end of s (assuming it is nul-terminated...) so ignore the error. */
2235 /* coverity[tainted_data] */
2236 if (s[count] == '.')
2237 {
2238 int d = 100;
2239 while (isdigit(s[++count]))
2240 {
2241 value += (s[count] - '0') * d;
2242 d /= 10;
2243 }
2244 }
2245
2246 while (isspace(s[count])) count++;
2247
2248 if (s[count] != 0)
2249 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2250
2251 if (data_block == NULL)
2252 *((int *)(ol->value)) = value;
2253 else
2254 *((int *)(US data_block + (long int)(ol->value))) = value;
2255 break;
2256
2257 /* There's a special routine to read time values. */
2258
2259 case opt_time:
2260 value = readconf_readtime(s, 0, FALSE);
2261 if (value < 0)
2262 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2263 name);
2264 if (data_block == NULL)
2265 *((int *)(ol->value)) = value;
2266 else
2267 *((int *)(US data_block + (long int)(ol->value))) = value;
2268 break;
2269
2270 /* A time list is a list of colon-separated times, with the first
2271 element holding the size of the list and the second the number of
2272 entries used. */
2273
2274 case opt_timelist:
2275 {
2276 int count = 0;
2277 int *list = (data_block == NULL)?
2278 (int *)(ol->value) :
2279 (int *)(US data_block + (long int)(ol->value));
2280
2281 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2282 {
2283 int terminator = 0;
2284 uschar *snext = Ustrchr(s, ':');
2285 if (snext != NULL)
2286 {
2287 uschar *ss = snext;
2288 while (ss > s && isspace(ss[-1])) ss--;
2289 terminator = *ss;
2290 }
2291 value = readconf_readtime(s, terminator, FALSE);
2292 if (value < 0)
2293 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2294 name);
2295 if (count > 1 && value <= list[count])
2296 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2297 "time value out of order for %s", name);
2298 list[count+1] = value;
2299 if (snext == NULL) break;
2300 s = snext + 1;
2301 while (isspace(*s)) s++;
2302 }
2303
2304 if (count > list[0] - 2)
2305 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2306 name);
2307 if (count > 0 && list[2] == 0) count = 0;
2308 list[1] = count;
2309 break;
2310 }
2311
2312 case opt_func:
2313 {
2314 void (*fn)() = ol->value;
2315 fn(name, s);
2316 break;
2317 }
2318 }
2319
2320 return TRUE;
2321 }
2322
2323
2324
2325 /*************************************************
2326 * Print a time value *
2327 *************************************************/
2328
2329 /*
2330 Argument: a time value in seconds
2331 Returns: pointer to a fixed buffer containing the time as a string,
2332 in readconf_readtime() format
2333 */
2334
2335 uschar *
2336 readconf_printtime(int t)
2337 {
2338 int s, m, h, d, w;
2339 uschar *p = time_buffer;
2340
2341 if (t < 0)
2342 {
2343 *p++ = '-';
2344 t = -t;
2345 }
2346
2347 s = t % 60;
2348 t /= 60;
2349 m = t % 60;
2350 t /= 60;
2351 h = t % 24;
2352 t /= 24;
2353 d = t % 7;
2354 w = t/7;
2355
2356 if (w > 0) p += sprintf(CS p, "%dw", w);
2357 if (d > 0) p += sprintf(CS p, "%dd", d);
2358 if (h > 0) p += sprintf(CS p, "%dh", h);
2359 if (m > 0) p += sprintf(CS p, "%dm", m);
2360 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2361
2362 return time_buffer;
2363 }
2364
2365
2366
2367 /*************************************************
2368 * Print an individual option value *
2369 *************************************************/
2370
2371 /* This is used by the -bP option, so prints to the standard output.
2372 The entire options list is passed in as an argument, because some options come
2373 in pairs - typically uid/gid settings, which can either be explicit numerical
2374 values, or strings to be expanded later. If the numerical value is unset,
2375 search for "*expand_<name>" to see if there is a string equivalent.
2376
2377 Arguments:
2378 ol option entry, or NULL for an unknown option
2379 name option name
2380 options_block NULL for main configuration options; otherwise points to
2381 a driver block; if the option doesn't have opt_public
2382 set, then options_block->options_block is where the item
2383 resides.
2384 oltop points to the option list in which ol exists
2385 last one more than the offset of the last entry in optop
2386 no_labels do not show "foo = " at the start.
2387
2388 Returns: boolean success
2389 */
2390
2391 static BOOL
2392 print_ol(optionlist *ol, uschar *name, void *options_block,
2393 optionlist *oltop, int last, BOOL no_labels)
2394 {
2395 struct passwd *pw;
2396 struct group *gr;
2397 optionlist *ol2;
2398 void *value;
2399 uid_t *uidlist;
2400 gid_t *gidlist;
2401 uschar *s;
2402 uschar name2[64];
2403
2404 if (!ol)
2405 {
2406 printf("%s is not a known option\n", name);
2407 return FALSE;
2408 }
2409
2410 /* Non-admin callers cannot see options that have been flagged secure by the
2411 "hide" prefix. */
2412
2413 if (!admin_user && ol->type & opt_secure)
2414 {
2415 if (no_labels)
2416 printf("%s\n", hidden);
2417 else
2418 printf("%s = %s\n", name, hidden);
2419 return TRUE;
2420 }
2421
2422 /* Else show the value of the option */
2423
2424 value = ol->value;
2425 if (options_block)
2426 {
2427 if (!(ol->type & opt_public))
2428 options_block = (void *)(((driver_instance *)options_block)->options_block);
2429 value = (void *)(US options_block + (long int)value);
2430 }
2431
2432 switch(ol->type & opt_mask)
2433 {
2434 case opt_stringptr:
2435 case opt_rewrite: /* Show the text value */
2436 s = *(USS value);
2437 if (!no_labels) printf("%s = ", name);
2438 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2439 break;
2440
2441 case opt_int:
2442 if (!no_labels) printf("%s = ", name);
2443 printf("%d\n", *((int *)value));
2444 break;
2445
2446 case opt_mkint:
2447 {
2448 int x = *((int *)value);
2449 if (x != 0 && (x & 1023) == 0)
2450 {
2451 int c = 'K';
2452 x >>= 10;
2453 if ((x & 1023) == 0)
2454 {
2455 c = 'M';
2456 x >>= 10;
2457 }
2458 if (!no_labels) printf("%s = ", name);
2459 printf("%d%c\n", x, c);
2460 }
2461 else
2462 {
2463 if (!no_labels) printf("%s = ", name);
2464 printf("%d\n", x);
2465 }
2466 }
2467 break;
2468
2469 case opt_Kint:
2470 {
2471 int x = *((int *)value);
2472 if (!no_labels) printf("%s = ", name);
2473 if (x == 0) printf("0\n");
2474 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2475 else printf("%dK\n", x);
2476 }
2477 break;
2478
2479 case opt_octint:
2480 if (!no_labels) printf("%s = ", name);
2481 printf("%#o\n", *((int *)value));
2482 break;
2483
2484 /* Can be negative only when "unset", in which case integer */
2485
2486 case opt_fixed:
2487 {
2488 int x = *((int *)value);
2489 int f = x % 1000;
2490 int d = 100;
2491 if (x < 0) printf("%s =\n", name); else
2492 {
2493 if (!no_labels) printf("%s = ", name);
2494 printf("%d.", x/1000);
2495 do
2496 {
2497 printf("%d", f/d);
2498 f %= d;
2499 d /= 10;
2500 }
2501 while (f != 0);
2502 printf("\n");
2503 }
2504 }
2505 break;
2506
2507 /* If the numerical value is unset, try for the string value */
2508
2509 case opt_expand_uid:
2510 if (! *get_set_flag(name, oltop, last, options_block))
2511 {
2512 sprintf(CS name2, "*expand_%.50s", name);
2513 if ((ol2 = find_option(name2, oltop, last)))
2514 {
2515 void *value2 = ol2->value;
2516 if (options_block)
2517 value2 = (void *)(US options_block + (long int)value2);
2518 s = *(USS value2);
2519 if (!no_labels) printf("%s = ", name);
2520 printf("%s\n", s ? string_printing(s) : US"");
2521 break;
2522 }
2523 }
2524
2525 /* Else fall through */
2526
2527 case opt_uid:
2528 if (!no_labels) printf("%s = ", name);
2529 if (! *get_set_flag(name, oltop, last, options_block))
2530 printf("\n");
2531 else
2532 if ((pw = getpwuid(*((uid_t *)value))))
2533 printf("%s\n", pw->pw_name);
2534 else
2535 printf("%ld\n", (long int)(*((uid_t *)value)));
2536 break;
2537
2538 /* If the numerical value is unset, try for the string value */
2539
2540 case opt_expand_gid:
2541 if (! *get_set_flag(name, oltop, last, options_block))
2542 {
2543 sprintf(CS name2, "*expand_%.50s", name);
2544 if ( (ol2 = find_option(name2, oltop, last))
2545 && (ol2->type & opt_mask) == opt_stringptr)
2546 {
2547 void *value2 = ol2->value;
2548 if (options_block)
2549 value2 = (void *)(US options_block + (long int)value2);
2550 s = *(USS value2);
2551 if (!no_labels) printf("%s = ", name);
2552 printf("%s\n", s ? string_printing(s) : US"");
2553 break;
2554 }
2555 }
2556
2557 /* Else fall through */
2558
2559 case opt_gid:
2560 if (!no_labels) printf("%s = ", name);
2561 if (! *get_set_flag(name, oltop, last, options_block))
2562 printf("\n");
2563 else
2564 if ((gr = getgrgid(*((int *)value))))
2565 printf("%s\n", gr->gr_name);
2566 else
2567 printf("%ld\n", (long int)(*((int *)value)));
2568 break;
2569
2570 case opt_uidlist:
2571 uidlist = *((uid_t **)value);
2572 if (!no_labels) printf("%s =", name);
2573 if (uidlist)
2574 {
2575 int i;
2576 uschar sep = no_labels ? '\0' : ' ';
2577 for (i = 1; i <= (int)(uidlist[0]); i++)
2578 {
2579 uschar *name = NULL;
2580 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2581 if (sep != '\0') printf("%c", sep);
2582 if (name) printf("%s", name);
2583 else printf("%ld", (long int)(uidlist[i]));
2584 sep = ':';
2585 }
2586 }
2587 printf("\n");
2588 break;
2589
2590 case opt_gidlist:
2591 gidlist = *((gid_t **)value);
2592 if (!no_labels) printf("%s =", name);
2593 if (gidlist)
2594 {
2595 int i;
2596 uschar sep = no_labels ? '\0' : ' ';
2597 for (i = 1; i <= (int)(gidlist[0]); i++)
2598 {
2599 uschar *name = NULL;
2600 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2601 if (sep != '\0') printf("%c", sep);
2602 if (name) printf("%s", name);
2603 else printf("%ld", (long int)(gidlist[i]));
2604 sep = ':';
2605 }
2606 }
2607 printf("\n");
2608 break;
2609
2610 case opt_time:
2611 if (!no_labels) printf("%s = ", name);
2612 printf("%s\n", readconf_printtime(*((int *)value)));
2613 break;
2614
2615 case opt_timelist:
2616 {
2617 int i;
2618 int *list = (int *)value;
2619 if (!no_labels) printf("%s = ", name);
2620 for (i = 0; i < list[1]; i++)
2621 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2622 printf("\n");
2623 }
2624 break;
2625
2626 case opt_bit:
2627 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2628 "" : "no_", name);
2629 break;
2630
2631 case opt_expand_bool:
2632 sprintf(CS name2, "*expand_%.50s", name);
2633 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2634 {
2635 void *value2 = ol2->value;
2636 if (options_block)
2637 value2 = (void *)(US options_block + (long int)value2);
2638 s = *(USS value2);
2639 if (s)
2640 {
2641 if (!no_labels) printf("%s = ", name);
2642 printf("%s\n", string_printing(s));
2643 break;
2644 }
2645 /* s == NULL => string not set; fall through */
2646 }
2647
2648 /* Fall through */
2649
2650 case opt_bool:
2651 case opt_bool_verify:
2652 case opt_bool_set:
2653 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2654 break;
2655 }
2656 return TRUE;
2657 }
2658
2659
2660
2661 /*************************************************
2662 * Print value from main configuration *
2663 *************************************************/
2664
2665 /* This function, called as a result of encountering the -bP option,
2666 causes the value of any main configuration variable to be output if the
2667 second argument is NULL. There are some special values:
2668
2669 all print all main configuration options
2670 config_file print the name of the configuration file
2671 (configure_file will still work, for backward
2672 compatibility)
2673 routers print the routers' configurations
2674 transports print the transports' configuration
2675 authenticators print the authenticators' configuration
2676 macros print the macros' configuration
2677 router_list print a list of router names
2678 transport_list print a list of transport names
2679 authenticator_list print a list of authentication mechanism names
2680 macro_list print a list of macro names
2681 +name print a named list item
2682 local_scan print the local_scan options
2683 config print the configuration as it is parsed
2684 environment print the used execution environment
2685
2686 If the second argument is not NULL, it must be one of "router", "transport",
2687 "authenticator" or "macro" in which case the first argument identifies the
2688 driver whose options are to be printed.
2689
2690 Arguments:
2691 name option name if type == NULL; else driver name
2692 type NULL or driver type name, as described above
2693 no_labels avoid the "foo = " at the start of an item
2694
2695 Returns: Boolean success
2696 */
2697
2698 BOOL
2699 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2700 {
2701 BOOL names_only = FALSE;
2702 optionlist *ol;
2703 optionlist *ol2 = NULL;
2704 driver_instance *d = NULL;
2705 macro_item *m;
2706 int size = 0;
2707
2708 if (!type)
2709 {
2710 if (*name == '+')
2711 {
2712 int i;
2713 tree_node *t;
2714 BOOL found = FALSE;
2715 static uschar *types[] = { US"address", US"domain", US"host",
2716 US"localpart" };
2717 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2718 &hostlist_anchor, &localpartlist_anchor };
2719
2720 for (i = 0; i < 4; i++)
2721 if ((t = tree_search(*(anchors[i]), name+1)))
2722 {
2723 found = TRUE;
2724 if (no_labels)
2725 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2726 else
2727 printf("%slist %s = %s\n", types[i], name+1,
2728 ((namedlist_block *)(t->data.ptr))->string);
2729 }
2730
2731 if (!found)
2732 printf("no address, domain, host, or local part list called \"%s\" "
2733 "exists\n", name+1);
2734
2735 return found;
2736 }
2737
2738 if ( Ustrcmp(name, "configure_file") == 0
2739 || Ustrcmp(name, "config_file") == 0)
2740 {
2741 printf("%s\n", CS config_main_filename);
2742 return TRUE;
2743 }
2744
2745 if (Ustrcmp(name, "all") == 0)
2746 {
2747 for (ol = optionlist_config;
2748 ol < optionlist_config + nelem(optionlist_config); ol++)
2749 if (!(ol->type & opt_hidden))
2750 (void) print_ol(ol, US ol->name, NULL,
2751 optionlist_config, nelem(optionlist_config),
2752 no_labels);
2753 return TRUE;
2754 }
2755
2756 if (Ustrcmp(name, "local_scan") == 0)
2757 {
2758 #ifndef LOCAL_SCAN_HAS_OPTIONS
2759 printf("local_scan() options are not supported\n");
2760 return FALSE;
2761 #else
2762 for (ol = local_scan_options;
2763 ol < local_scan_options + local_scan_options_count; ol++)
2764 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2765 local_scan_options_count, no_labels);
2766 return TRUE;
2767 #endif
2768 }
2769
2770 if (Ustrcmp(name, "config") == 0)
2771 {
2772 print_config(admin_user, no_labels);
2773 return TRUE;
2774 }
2775
2776 if (Ustrcmp(name, "routers") == 0)
2777 {
2778 type = US"router";
2779 name = NULL;
2780 }
2781 else if (Ustrcmp(name, "transports") == 0)
2782 {
2783 type = US"transport";
2784 name = NULL;
2785 }
2786 else if (Ustrcmp(name, "authenticators") == 0)
2787 {
2788 type = US"authenticator";
2789 name = NULL;
2790 }
2791 else if (Ustrcmp(name, "macros") == 0)
2792 {
2793 type = US"macro";
2794 name = NULL;
2795 }
2796 else if (Ustrcmp(name, "router_list") == 0)
2797 {
2798 type = US"router";
2799 name = NULL;
2800 names_only = TRUE;
2801 }
2802 else if (Ustrcmp(name, "transport_list") == 0)
2803 {
2804 type = US"transport";
2805 name = NULL;
2806 names_only = TRUE;
2807 }
2808 else if (Ustrcmp(name, "authenticator_list") == 0)
2809 {
2810 type = US"authenticator";
2811 name = NULL;
2812 names_only = TRUE;
2813 }
2814 else if (Ustrcmp(name, "macro_list") == 0)
2815 {
2816 type = US"macro";
2817 name = NULL;
2818 names_only = TRUE;
2819 }
2820 else if (Ustrcmp(name, "environment") == 0)
2821 {
2822 if (environ)
2823 {
2824 uschar ** p;
2825 for (p = USS environ; *p; p++) ;
2826 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2827
2828 for (p = USS environ; *p; p++)
2829 {
2830 uschar * q;
2831 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2832 puts(CS *p);
2833 }
2834 }
2835 return TRUE;
2836 }
2837
2838 else
2839 return print_ol(find_option(name,
2840 optionlist_config, nelem(optionlist_config)),
2841 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2842 }
2843
2844 /* Handle the options for a router or transport. Skip options that are flagged
2845 as hidden. Some of these are options with names starting with '*', used for
2846 internal alternative representations of other options (which the printing
2847 function will sort out). Others are synonyms kept for backward compatibility.
2848 */
2849
2850 if (Ustrcmp(type, "router") == 0)
2851 {
2852 d = (driver_instance *)routers;
2853 ol2 = optionlist_routers;
2854 size = optionlist_routers_size;
2855 }
2856 else if (Ustrcmp(type, "transport") == 0)
2857 {
2858 d = (driver_instance *)transports;
2859 ol2 = optionlist_transports;
2860 size = optionlist_transports_size;
2861 }
2862 else if (Ustrcmp(type, "authenticator") == 0)
2863 {
2864 d = (driver_instance *)auths;
2865 ol2 = optionlist_auths;
2866 size = optionlist_auths_size;
2867 }
2868
2869 else if (Ustrcmp(type, "macro") == 0)
2870 {
2871 /* People store passwords in macros and they were previously not available
2872 for printing. So we have an admin_users restriction. */
2873 if (!admin_user)
2874 {
2875 fprintf(stderr, "exim: permission denied\n");
2876 return FALSE;
2877 }
2878 for (m = macros; m; m = m->next)
2879 if (!name || Ustrcmp(name, m->name) == 0)
2880 {
2881 if (names_only)
2882 printf("%s\n", CS m->name);
2883 else if (no_labels)
2884 printf("%s\n", CS m->replacement);
2885 else
2886 printf("%s=%s\n", CS m->name, CS m->replacement);
2887 if (name)
2888 return TRUE;
2889 }
2890 if (!name) return TRUE;
2891
2892 printf("%s %s not found\n", type, name);
2893 return FALSE;
2894 }
2895
2896 if (names_only)
2897 {
2898 for (; d; d = d->next) printf("%s\n", CS d->name);
2899 return TRUE;
2900 }
2901
2902 /* Either search for a given driver, or print all of them */
2903
2904 for (; d; d = d->next)
2905 {
2906 BOOL rc = FALSE;
2907 if (!name)
2908 printf("\n%s %s:\n", d->name, type);
2909 else if (Ustrcmp(d->name, name) != 0) continue;
2910
2911 for (ol = ol2; ol < ol2 + size; ol++)
2912 if (!(ol->type & opt_hidden))
2913 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2914
2915 for (ol = d->info->options;
2916 ol < d->info->options + *(d->info->options_count); ol++)
2917 if (!(ol->type & opt_hidden))
2918 rc |= print_ol(ol, US ol->name, d, d->info->options,
2919 *d->info->options_count, no_labels);
2920
2921 if (name) return rc;
2922 }
2923 if (!name) return TRUE;
2924
2925 printf("%s %s not found\n", type, name);
2926 return FALSE;
2927 }
2928
2929
2930
2931 /*************************************************
2932 * Read a named list item *
2933 *************************************************/
2934
2935 /* This function reads a name and a list (i.e. string). The name is used to
2936 save the list in a tree, sorted by its name. Each entry also has a number,
2937 which can be used for caching tests, but if the string contains any expansion
2938 items other than $key, the number is set negative to inhibit caching. This
2939 mechanism is used for domain, host, and address lists that are referenced by
2940 the "+name" syntax.
2941
2942 Arguments:
2943 anchorp points to the tree anchor
2944 numberp points to the current number for this tree
2945 max the maximum number permitted
2946 s the text of the option line, starting immediately after the name
2947 of the list type
2948 tname the name of the list type, for messages
2949
2950 Returns: nothing
2951 */
2952
2953 static void
2954 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2955 uschar *tname)
2956 {
2957 BOOL forcecache = FALSE;
2958 uschar *ss;
2959 tree_node *t;
2960 namedlist_block *nb = store_get(sizeof(namedlist_block));
2961
2962 if (Ustrncmp(s, "_cache", 6) == 0)
2963 {
2964 forcecache = TRUE;
2965 s += 6;
2966 }
2967
2968 if (!isspace(*s))
2969 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2970
2971 if (*numberp >= max)
2972 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2973 tname, max);
2974
2975 while (isspace(*s)) s++;
2976 ss = s;
2977 while (isalnum(*s) || *s == '_') s++;
2978 t = store_get(sizeof(tree_node) + s-ss);
2979 Ustrncpy(t->name, ss, s-ss);
2980 t->name[s-ss] = 0;
2981 while (isspace(*s)) s++;
2982
2983 if (!tree_insertnode(anchorp, t))
2984 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2985 "duplicate name \"%s\" for a named %s", t->name, tname);
2986
2987 t->data.ptr = nb;
2988 nb->number = *numberp;
2989 *numberp += 1;
2990
2991 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2992 "missing '=' after \"%s\"", t->name);
2993 while (isspace(*s)) s++;
2994 nb->string = read_string(s, t->name);
2995 nb->cache_data = NULL;
2996
2997 /* Check the string for any expansions; if any are found, mark this list
2998 uncacheable unless the user has explicited forced caching. */
2999
3000 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3001 }
3002
3003
3004
3005
3006 /*************************************************
3007 * Unpick data for a rate limit *
3008 *************************************************/
3009
3010 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3011 separate values.
3012
3013 Arguments:
3014 s string, in the form t,b,f,l
3015 where t is the threshold (integer)
3016 b is the initial delay (time)
3017 f is the multiplicative factor (fixed point)
3018 k is the maximum time (time)
3019 threshold where to store threshold
3020 base where to store base in milliseconds
3021 factor where to store factor in milliseconds
3022 limit where to store limit
3023
3024 Returns: nothing (panics on error)
3025 */
3026
3027 static void
3028 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3029 int *limit)
3030 {
3031 uschar bstring[16], lstring[16];
3032
3033 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3034 factor, lstring) == 4)
3035 {
3036 *base = readconf_readtime(bstring, 0, TRUE);
3037 *limit = readconf_readtime(lstring, 0, TRUE);
3038 if (*base >= 0 && *limit >= 0) return;
3039 }
3040 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3041 }
3042
3043
3044
3045
3046 /*************************************************
3047 * Drop privs for checking TLS config *
3048 *************************************************/
3049
3050 /* We want to validate TLS options during readconf, but do not want to be
3051 root when we call into the TLS library, in case of library linkage errors
3052 which cause segfaults; before this check, those were always done as the Exim
3053 runtime user and it makes sense to continue with that.
3054
3055 Assumes: tls_require_ciphers has been set, if it will be
3056 exim_user has been set, if it will be
3057 exim_group has been set, if it will be
3058
3059 Returns: bool for "okay"; false will cause caller to immediately exit.
3060 */
3061
3062 #ifdef SUPPORT_TLS
3063 static BOOL
3064 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3065 {
3066 const uschar *errmsg;
3067 pid_t pid;
3068 int rc, status;
3069 void (*oldsignal)(int);
3070
3071 /* If TLS will never be used, no point checking ciphers */
3072
3073 if ( !tls_advertise_hosts
3074 || !*tls_advertise_hosts
3075 || Ustrcmp(tls_advertise_hosts, ":") == 0
3076 )
3077 return TRUE;
3078 else if (!nowarn && !tls_certificate)
3079 log_write(0, LOG_MAIN,
3080 "Warning: No server certificate defined; will use a selfsigned one.\n"
3081 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3082
3083 oldsignal = signal(SIGCHLD, SIG_DFL);
3084
3085 fflush(NULL);
3086 if ((pid = fork()) < 0)
3087 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3088
3089 if (pid == 0)
3090 {
3091 /* in some modes, will have dropped privilege already */
3092 if (!geteuid())
3093 exim_setugid(exim_uid, exim_gid, FALSE,
3094 US"calling tls_validate_require_cipher");
3095
3096 if ((errmsg = tls_validate_require_cipher()))
3097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3098 "tls_require_ciphers invalid: %s", errmsg);
3099 fflush(NULL);
3100 _exit(0);
3101 }
3102
3103 do {
3104 rc = waitpid(pid, &status, 0);
3105 } while (rc < 0 && errno == EINTR);
3106
3107 DEBUG(D_tls)
3108 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3109 (int)pid, status);
3110
3111 signal(SIGCHLD, oldsignal);
3112
3113 return status == 0;
3114 }
3115 #endif /* SUPPORT_TLS */
3116
3117
3118
3119
3120 /*************************************************
3121 * Read main configuration options *
3122 *************************************************/
3123
3124 /* This function is the first to be called for configuration reading. It
3125 opens the configuration file and reads general configuration settings until
3126 it reaches the end of the configuration section. The file is then left open so
3127 that the remaining configuration data can subsequently be read if needed for
3128 this run of Exim.
3129
3130 The configuration file must be owned either by root or exim, and be writeable
3131 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3132 in the config file, so the test is done on the compiled in values. A slight
3133 anomaly, to be carefully documented.
3134
3135 The name of the configuration file is taken from a list that is included in the
3136 binary of Exim. It can be altered from the command line, but if that is done,
3137 root privilege is immediately withdrawn unless the caller is root or exim.
3138 The first file on the list that exists is used.
3139
3140 For use on multiple systems that share file systems, first look for a
3141 configuration file whose name has the current node name on the end. If that is
3142 not found, try the generic name. For really contorted configurations, that run
3143 multiple Exims with different uid settings, first try adding the effective uid
3144 before the node name. These complications are going to waste resources on most
3145 systems. Therefore they are available only when requested by compile-time
3146 options. */
3147
3148 void
3149 readconf_main(BOOL nowarn)
3150 {
3151 int sep = 0;
3152 struct stat statbuf;
3153 uschar *s, *filename;
3154 const uschar *list = config_main_filelist;
3155
3156 /* Loop through the possible file names */
3157
3158 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3159 {
3160
3161 /* Cut out all the fancy processing unless specifically wanted */
3162
3163 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3164 uschar *suffix = filename + Ustrlen(filename);
3165
3166 /* Try for the node-specific file if a node name exists */
3167
3168 #ifdef CONFIGURE_FILE_USE_NODE
3169 struct utsname uts;
3170 if (uname(&uts) >= 0)
3171 {
3172 #ifdef CONFIGURE_FILE_USE_EUID
3173 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3174 config_file = Ufopen(filename, "rb");
3175 if (config_file == NULL)
3176 #endif /* CONFIGURE_FILE_USE_EUID */
3177 {
3178 sprintf(CS suffix, ".%.256s", uts.nodename);
3179 config_file = Ufopen(filename, "rb");
3180 }
3181 }
3182 #endif /* CONFIGURE_FILE_USE_NODE */
3183
3184 /* Otherwise, try the generic name, possibly with the euid added */
3185
3186 #ifdef CONFIGURE_FILE_USE_EUID
3187 if (config_file == NULL)
3188 {
3189 sprintf(CS suffix, ".%ld", (long int)original_euid);
3190 config_file = Ufopen(filename, "rb");
3191 }
3192 #endif /* CONFIGURE_FILE_USE_EUID */
3193
3194 /* Finally, try the unadorned name */
3195
3196 if (config_file == NULL)
3197 {
3198 *suffix = 0;
3199 config_file = Ufopen(filename, "rb");
3200 }
3201 #else /* if neither defined */
3202
3203 /* This is the common case when the fancy processing is not included. */
3204
3205 config_file = Ufopen(filename, "rb");
3206 #endif
3207
3208 /* If the file does not exist, continue to try any others. For any other
3209 error, break out (and die). */
3210
3211 if (config_file != NULL || errno != ENOENT) break;
3212 }
3213
3214 /* On success, save the name for verification; config_filename is used when
3215 logging configuration errors (it changes for .included files) whereas
3216 config_main_filename is the name shown by -bP. Failure to open a configuration
3217 file is a serious disaster. */
3218
3219 if (config_file)
3220 {
3221 uschar *last_slash = Ustrrchr(filename, '/');
3222 config_filename = config_main_filename = string_copy(filename);
3223
3224 /* The config_main_directory we need for the $config_dir expansion.
3225 config_main_filename we need for $config_file expansion.
3226 And config_dir is the directory of the current configuration, used for
3227 relative .includes. We do need to know it's name, as we change our working
3228 directory later. */
3229
3230 if (filename[0] == '/')
3231 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3232 else
3233 {
3234 /* relative configuration file name: working dir + / + basename(filename) */
3235
3236 uschar buf[PATH_MAX];
3237 gstring * g;
3238
3239 if (os_getcwd(buf, PATH_MAX) == NULL)
3240 {
3241 perror("exim: getcwd");
3242 exit(EXIT_FAILURE);
3243 }
3244 g = string_cat(NULL, buf);
3245
3246 /* If the dir does not end with a "/", append one */
3247 if (g->s[g->ptr-1] != '/')
3248 g = string_catn(g, US"/", 1);
3249
3250 /* If the config file contains a "/", extract the directory part */
3251 if (last_slash)
3252 g = string_catn(g, filename, last_slash - filename);
3253
3254 config_main_directory = string_from_gstring(g);
3255 }
3256 config_directory = config_main_directory;
3257 }
3258 else
3259 {
3260 if (filename == NULL)
3261 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3262 "%s", config_main_filelist);
3263 else
3264 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3265 "configuration file %s", filename));
3266 }
3267
3268 /* Now, once we found and opened our configuration file, we change the directory
3269 to a safe place. Later we change to $spool_directory. */
3270
3271 if (Uchdir("/") < 0)
3272 {
3273 perror("exim: chdir `/': ");
3274 exit(EXIT_FAILURE);
3275 }
3276
3277 /* Check the status of the file we have opened, if we have retained root
3278 privileges and the file isn't /dev/null (which *should* be 0666). */
3279
3280 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3281 {
3282 if (fstat(fileno(config_file), &statbuf) != 0)
3283 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3284 big_buffer);
3285
3286 if ((statbuf.st_uid != root_uid /* owner not root */
3287 #ifdef CONFIGURE_OWNER
3288 && statbuf.st_uid != config_uid /* owner not the special one */
3289 #endif
3290 ) || /* or */
3291 (statbuf.st_gid != root_gid /* group not root & */
3292 #ifdef CONFIGURE_GROUP
3293 && statbuf.st_gid != config_gid /* group not the special one */
3294 #endif
3295 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3296 /* or */
3297 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3298
3299 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3300 "wrong owner, group, or mode", big_buffer);
3301 }
3302
3303 /* Process the main configuration settings. They all begin with a lower case
3304 letter. If we see something starting with an upper case letter, it is taken as
3305 a macro definition. */
3306
3307 while ((s = get_config_line()))
3308 {
3309 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3310 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3311 "found unexpected BOM (Byte Order Mark)");
3312
3313 if (isupper(s[0]))
3314 { if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE, US""); }
3315
3316 else if (Ustrncmp(s, "domainlist", 10) == 0)
3317 read_named_list(&domainlist_anchor, &domainlist_count,
3318 MAX_NAMED_LIST, s+10, US"domain list");
3319
3320 else if (Ustrncmp(s, "hostlist", 8) == 0)
3321 read_named_list(&hostlist_anchor, &hostlist_count,
3322 MAX_NAMED_LIST, s+8, US"host list");
3323
3324 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3325 read_named_list(&addresslist_anchor, &addresslist_count,
3326 MAX_NAMED_LIST, s+11, US"address list");
3327
3328 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3329 read_named_list(&localpartlist_anchor, &localpartlist_count,
3330 MAX_NAMED_LIST, s+13, US"local part list");
3331
3332 else
3333 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3334 NULL, US"main option \"%s\" unknown");
3335 }
3336
3337
3338 /* If local_sender_retain is set, local_from_check must be unset. */
3339
3340 if (local_sender_retain && local_from_check)
3341 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3342 "local_sender_retain are set; this combination is not allowed");
3343
3344 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3345 wanted. */
3346
3347 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3348
3349 /* The max retry interval must not be greater than 24 hours. */
3350
3351 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3352
3353 /* remote_max_parallel must be > 0 */
3354
3355 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3356
3357 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3358 start of a new SMTP message. */
3359
3360 freeze_tell_config = freeze_tell;
3361
3362 /* The primary host name may be required for expansion of spool_directory
3363 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3364 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3365 canonize it. Some people like upper case letters in their host names, so we
3366 don't force the case. */
3367
3368 if (primary_hostname == NULL)
3369 {
3370 const uschar *hostname;
3371 struct utsname uts;
3372 if (uname(&uts) < 0)
3373 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3374 hostname = US uts.nodename;
3375
3376 if (Ustrchr(hostname, '.') == NULL)
3377 {
3378 int af = AF_INET;
3379 struct hostent *hostdata;
3380
3381 #if HAVE_IPV6
3382 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3383 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3384 MCL_DOMAIN, TRUE, NULL) != OK))
3385 af = AF_INET6;
3386 #else
3387 af = AF_INET;
3388 #endif
3389
3390 for (;;)
3391 {
3392 #if HAVE_IPV6
3393 #if HAVE_GETIPNODEBYNAME
3394 int error_num;
3395 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3396 #else
3397 hostdata = gethostbyname2(CS hostname, af);
3398 #endif
3399 #else
3400 hostdata = gethostbyname(CS hostname);
3401 #endif
3402
3403 if (hostdata != NULL)
3404 {
3405 hostname = US hostdata->h_name;
3406 break;
3407 }
3408
3409 if (af == AF_INET) break;
3410 af = AF_INET;
3411 }
3412 }
3413
3414 primary_hostname = string_copy(hostname);
3415 }
3416
3417 /* Set up default value for smtp_active_hostname */
3418
3419 smtp_active_hostname = primary_hostname;
3420
3421 /* If spool_directory wasn't set in the build-time configuration, it must have
3422 got set above. Of course, writing to the log may not work if log_file_path is
3423 not set, but it will at least get to syslog or somewhere, with any luck. */
3424
3425 if (*spool_directory == 0)
3426 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3427 "proceed");
3428
3429 /* Expand the spool directory name; it may, for example, contain the primary
3430 host name. Same comment about failure. */
3431
3432 s = expand_string(spool_directory);
3433 if (s == NULL)
3434 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3435 "\"%s\": %s", spool_directory, expand_string_message);
3436 spool_directory = s;
3437
3438 /* Expand log_file_path, which must contain "%s" in any component that isn't
3439 the null string or "syslog". It is also allowed to contain one instance of %D
3440 or %M. However, it must NOT contain % followed by anything else. */
3441
3442 if (*log_file_path != 0)
3443 {
3444 const uschar *ss, *sss;
3445 int sep = ':'; /* Fixed for log file path */
3446 s = expand_string(log_file_path);
3447 if (s == NULL)
3448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3449 "\"%s\": %s", log_file_path, expand_string_message);
3450
3451 ss = s;
3452 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3453 {
3454 uschar *t;
3455 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3456 t = Ustrstr(sss, "%s");
3457 if (t == NULL)
3458 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3459 "contain \"%%s\"", sss);
3460 *t = 'X';
3461 t = Ustrchr(sss, '%');
3462 if (t != NULL)
3463 {
3464 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3465 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3466 "unexpected \"%%\" character", s);
3467 }
3468 }
3469
3470 log_file_path = s;
3471 }
3472
3473 /* Interpret syslog_facility into an integer argument for 'ident' param to
3474 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3475 leading "log_". */
3476
3477 if (syslog_facility_str)
3478 {
3479 int i;
3480 uschar *s = syslog_facility_str;
3481
3482 if ((Ustrlen(syslog_facility_str) >= 4) &&
3483 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3484 s += 4;
3485
3486 for (i = 0; i < syslog_list_size; i++)
3487 if (strcmpic(s, syslog_list[i].name) == 0)
3488 {
3489 syslog_facility = syslog_list[i].value;
3490 break;
3491 }
3492
3493 if (i >= syslog_list_size)
3494 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3495 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3496 }
3497
3498 /* Expand pid_file_path */
3499
3500 if (*pid_file_path != 0)
3501 {
3502 if (!(s = expand_string(pid_file_path)))
3503 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3504 "\"%s\": %s", pid_file_path, expand_string_message);
3505 pid_file_path = s;
3506 }
3507
3508 /* Set default value of process_log_path */
3509
3510 if (!process_log_path || *process_log_path =='\0')
3511 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3512
3513 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3514 message. */
3515
3516 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3517
3518 /* Unpick the SMTP rate limiting options, if set */
3519
3520 if (smtp_ratelimit_mail)
3521 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3522 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3523
3524 if (smtp_ratelimit_rcpt)
3525 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3526 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3527
3528 /* The qualify domains default to the primary host name */
3529
3530 if (!qualify_domain_sender)
3531 qualify_domain_sender = primary_hostname;
3532 if (!qualify_domain_recipient)
3533 qualify_domain_recipient = qualify_domain_sender;
3534
3535 /* Setting system_filter_user in the configuration sets the gid as well if a
3536 name is given, but a numerical value does not. */
3537
3538 if (system_filter_uid_set && !system_filter_gid_set)
3539 {
3540 struct passwd *pw = getpwuid(system_filter_uid);
3541 if (!pw)
3542 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3543 (long int)system_filter_uid);
3544 system_filter_gid = pw->pw_gid;
3545 system_filter_gid_set = TRUE;
3546 }
3547
3548 /* If the errors_reply_to field is set, check that it is syntactically valid
3549 and ensure it contains a domain. */
3550
3551 if (errors_reply_to)
3552 {
3553 uschar *errmess;
3554 int start, end, domain;
3555 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3556 &start, &end, &domain, FALSE);
3557
3558 if (!recipient)
3559 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3560 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3561
3562 if (domain == 0)
3563 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3564 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3565 }
3566
3567 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3568 smtp_accept_max must also be set. */
3569
3570 if (smtp_accept_max == 0 &&
3571 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3572 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3573 "smtp_accept_max must be set if smtp_accept_queue or "
3574 "smtp_accept_max_per_host is set");
3575
3576 /* Set up the host number if anything is specified. It is an expanded string
3577 so that it can be computed from the host name, for example. We do this last
3578 so as to ensure that everything else is set up before the expansion. */
3579
3580 if (host_number_string)
3581 {
3582 long int n;
3583 uschar *end;
3584 uschar *s = expand_string(host_number_string);
3585
3586 if (!s)
3587 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3588 "failed to expand localhost_number \"%s\": %s",
3589 host_number_string, expand_string_message);
3590 n = Ustrtol(s, &end, 0);
3591 while (isspace(*end)) end++;
3592 if (*end != 0)
3593 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3594 "localhost_number value is not a number: %s", s);
3595 if (n > LOCALHOST_MAX)
3596 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3597 "localhost_number is greater than the maximum allowed value (%d)",
3598 LOCALHOST_MAX);
3599 host_number = n;
3600 }
3601
3602 #ifdef SUPPORT_TLS
3603 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3604
3605 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3606 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3607 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3608 tls_verify_hosts ? "" : "try_");
3609
3610 /* This also checks that the library linkage is working and we can call
3611 routines in it, so call even if tls_require_ciphers is unset */
3612 if (!tls_dropprivs_validate_require_cipher(nowarn))
3613 exit(1);
3614
3615 /* Magic number: at time of writing, 1024 has been the long-standing value
3616 used by so many clients, and what Exim used to use always, that it makes
3617 sense to just min-clamp this max-clamp at that. */
3618 if (tls_dh_max_bits < 1024)
3619 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3620 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3621
3622 /* If openssl_options is set, validate it */
3623 if (openssl_options)
3624 {
3625 # ifdef USE_GNUTLS
3626 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3627 "openssl_options is set but we're using GnuTLS");
3628 # else
3629 long dummy;
3630 if (!tls_openssl_options_parse(openssl_options, &dummy))
3631 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3632 "openssl_options parse error: %s", openssl_options);
3633 # endif
3634 }
3635 #endif /*SUPPORT_TLS*/
3636
3637 if (!nowarn && !keep_environment && environ && *environ)
3638 log_write(0, LOG_MAIN,
3639 "Warning: purging the environment.\n"
3640 " Suggested action: use keep_environment.");
3641 }
3642
3643
3644
3645 /*************************************************
3646 * Initialize one driver *
3647 *************************************************/
3648
3649 /* This is called once the driver's generic options, if any, have been read.
3650 We can now find the driver, set up defaults for the private options, and
3651 unset any "set" bits in the private options table (which might have been
3652 set by another incarnation of the same driver).
3653
3654 Arguments:
3655 d pointer to driver instance block, with generic
3656 options filled in
3657 drivers_available vector of available drivers
3658 size_of_info size of each block in drivers_available
3659 class class of driver, for error message
3660
3661 Returns: pointer to the driver info block
3662 */
3663
3664 static driver_info *
3665 init_driver(driver_instance *d, driver_info *drivers_available,
3666 int size_of_info, uschar *class)
3667 {
3668 driver_info *dd;
3669
3670 for (dd = drivers_available; dd->driver_name[0] != 0;
3671 dd = (driver_info *)((US dd) + size_of_info))
3672 {
3673 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3674 {
3675 int i;
3676 int len = dd->options_len;
3677 d->info = dd;
3678 d->options_block = store_get(len);
3679 memcpy(d->options_block, dd->options_block, len);
3680 for (i = 0; i < *(dd->options_count); i++)
3681 dd->options[i].type &= ~opt_set;
3682 return dd;
3683 }
3684 }
3685
3686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3687 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3688
3689 return NULL; /* never obeyed */
3690 }
3691
3692
3693
3694
3695 /*************************************************
3696 * Initialize driver list *
3697 *************************************************/
3698
3699 /* This function is called for routers, transports, and authentication
3700 mechanisms. It reads the data from the current point in the configuration file
3701 up to the end of the section, and sets up a chain of instance blocks according
3702 to the file's contents. The file will already have been opened by a call to
3703 readconf_main, and must be left open for subsequent reading of further data.
3704
3705 Any errors cause a panic crash. Note that the blocks with names driver_info and
3706 driver_instance must map the first portions of all the _info and _instance
3707 blocks for this shared code to work.
3708
3709 Arguments:
3710 class "router", "transport", or "authenticator"
3711 anchor &routers, &transports, &auths
3712 drivers_available available drivers
3713 size_of_info size of each info block
3714 instance_default points to default data for an instance
3715 instance_size size of instance block
3716 driver_optionlist generic option list
3717 driver_optionlist_count count of generic option list
3718
3719 Returns: nothing
3720 */
3721
3722 void
3723 readconf_driver_init(
3724 uschar *class,
3725 driver_instance **anchor,
3726 driver_info *drivers_available,
3727 int size_of_info,
3728 void *instance_default,
3729 int instance_size,
3730 optionlist *driver_optionlist,
3731 int driver_optionlist_count)
3732 {
3733 driver_instance **p = anchor;
3734 driver_instance *d = NULL;
3735 uschar *buffer;
3736
3737 while ((buffer = get_config_line()) != NULL)
3738 {
3739 uschar name[64];
3740 uschar *s;
3741
3742 /* Read the first name on the line and test for the start of a new driver. A
3743 macro definition indicates the end of the previous driver. If this isn't the
3744 start of a new driver, the line will be re-read. */
3745
3746 s = readconf_readname(name, sizeof(name), buffer);
3747
3748 /* Handle macro definition, first finishing off the initialization of the
3749 previous driver, if any. */
3750
3751 if (isupper(*name) && *s == '=')
3752 {
3753 if (d)
3754 {
3755 if (!d->driver_name)
3756 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3757 "no driver defined for %s \"%s\"", class, d->name);
3758 (d->info->init)(d);
3759 d = NULL;
3760 }
3761 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE, US"");
3762 continue;
3763 }
3764
3765 /* If the line starts with a name terminated by a colon, we are at the
3766 start of the definition of a new driver. The rest of the line must be
3767 blank. */
3768
3769 if (*s++ == ':')
3770 {
3771 int i;
3772
3773 /* Finish off initializing the previous driver. */
3774
3775 if (d)
3776 {
3777 if (!d->driver_name)
3778 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3779 "no driver defined for %s \"%s\"", class, d->name);
3780 (d->info->init)(d);
3781 }
3782
3783 /* Check that we haven't already got a driver of this name */
3784
3785 for (d = *anchor; d; d = d->next)
3786 if (Ustrcmp(name, d->name) == 0)
3787 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3788 "there are two %ss called \"%s\"", class, name);
3789
3790 /* Set up a new driver instance data block on the chain, with
3791 its default values installed. */
3792
3793 d = store_get(instance_size);
3794 memcpy(d, instance_default, instance_size);
3795 *p = d;
3796 p = &d->next;
3797 d->name = string_copy(name);
3798
3799 /* Clear out the "set" bits in the generic options */
3800
3801 for (i = 0; i < driver_optionlist_count; i++)
3802 driver_optionlist[i].type &= ~opt_set;
3803
3804 /* Check nothing more on this line, then do the next loop iteration. */
3805
3806 while (isspace(*s)) s++;
3807 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3808 continue;
3809 }
3810
3811 /* Not the start of a new driver. Give an error if we have not set up a
3812 current driver yet. */
3813
3814 if (!d)
3815 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3816
3817 /* First look to see if this is a generic option; if it is "driver",
3818 initialize the driver. If is it not a generic option, we can look for a
3819 private option provided that the driver has been previously set up. */
3820
3821 if (readconf_handle_option(buffer, driver_optionlist,
3822 driver_optionlist_count, d, NULL))
3823 {
3824 if (!d->info && d->driver_name)
3825 init_driver(d, drivers_available, size_of_info, class);
3826 }
3827
3828 /* Handle private options - pass the generic block because some may
3829 live therein. A flag with each option indicates if it is in the public
3830 block. */
3831
3832 else if (d->info)
3833 readconf_handle_option(buffer, d->info->options,
3834 *(d->info->options_count), d, US"option \"%s\" unknown");
3835
3836 /* The option is not generic and the driver name has not yet been given. */
3837
3838 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3839 "(\"driver\" must be specified before any private options)", name);
3840 }
3841
3842 /* Run the initialization function for the final driver. */
3843
3844 if (d)
3845 {
3846 if (!d->driver_name)
3847 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3848 "no driver defined for %s \"%s\"", class, d->name);
3849 (d->info->init)(d);
3850 }
3851 }
3852
3853
3854
3855 /*************************************************
3856 * Check driver dependency *
3857 *************************************************/
3858
3859 /* This function is passed a driver instance and a string. It checks whether
3860 any of the string options for the driver contains the given string as an
3861 expansion variable.
3862
3863 Arguments:
3864 d points to a driver instance block
3865 s the string to search for
3866
3867 Returns: TRUE if a dependency is found
3868 */
3869
3870 BOOL
3871 readconf_depends(driver_instance *d, uschar *s)
3872 {
3873 int count = *(d->info->options_count);
3874 optionlist *ol;
3875 uschar *ss;
3876
3877 for (ol = d->info->options; ol < d->info->options + count; ol++)
3878 {
3879 void *options_block;
3880 uschar *value;
3881 int type = ol->type & opt_mask;
3882 if (type != opt_stringptr) continue;
3883 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3884 value = *(uschar **)(US options_block + (long int)(ol->value));
3885 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3886 {
3887 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3888 isalnum(ss[Ustrlen(s)])) continue;
3889 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3890 d->name, ol->name, s);
3891 return TRUE;
3892 }
3893 }
3894
3895 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3896 return FALSE;
3897 }
3898
3899
3900
3901
3902 /*************************************************
3903 * Decode an error type for retries *
3904 *************************************************/
3905
3906 /* This function is global because it is also called from the main
3907 program when testing retry information. It decodes strings such as "quota_7d"
3908 into numerical error codes.
3909
3910 Arguments:
3911 pp points to start of text
3912 p points past end of text
3913 basic_errno points to an int to receive the main error number
3914 more_errno points to an int to receive the secondary error data
3915
3916 Returns: NULL if decoded correctly; else points to error text
3917 */
3918
3919 uschar *
3920 readconf_retry_error(const uschar *pp, const uschar *p,
3921 int *basic_errno, int *more_errno)
3922 {
3923 int len;
3924 const uschar *q = pp;
3925 while (q < p && *q != '_') q++;
3926 len = q - pp;
3927
3928 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3929 {
3930 *basic_errno = ERRNO_EXIMQUOTA;
3931 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3932 return US"bad time value";
3933 }
3934
3935 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3936 {
3937 *basic_errno = ECONNREFUSED;
3938 if (q != p)
3939 {
3940 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3941 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3942 else return US"A or MX expected after \"refused\"";
3943 }
3944 }
3945
3946 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3947 {
3948 *basic_errno = ETIMEDOUT;
3949 if (q != p)
3950 {
3951 int i;
3952 int xlen = p - q - 1;
3953 const uschar *x = q + 1;
3954
3955 static uschar *extras[] =
3956 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3957 static int values[] =
3958 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3959
3960 for (i = 0; i < nelem(extras); i++)
3961 if (strncmpic(x, extras[i], xlen) == 0)
3962 {
3963 *more_errno = values[i];
3964 break;
3965 }
3966
3967 if (i >= nelem(extras))
3968 if (strncmpic(x, US"DNS", xlen) == 0)
3969 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3970 "available in retry rules (it has never worked) - treated as "
3971 "\"timeout\"");
3972 else
3973 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3974 }
3975 }
3976
3977 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3978 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3979 strncmpic(pp, US"data_4", 6) == 0)
3980 {
3981 BOOL bad = FALSE;
3982 int x = 255; /* means "any 4xx code" */
3983 if (p != pp + 8) bad = TRUE; else
3984 {
3985 int a = pp[6], b = pp[7];
3986 if (isdigit(a))
3987 {
3988 x = (a - '0') * 10;
3989 if (isdigit(b)) x += b - '0';
3990 else if (b == 'x') x += 100;
3991 else bad = TRUE;
3992 }
3993 else if (a != 'x' || b != 'x') bad = TRUE;
3994 }
3995
3996 if (bad)
3997 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3998 "x is literal and d is any digit", pp);
3999
4000 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4001 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4002 *more_errno = x << 8;
4003 }
4004
4005 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4006 strncmpic(q+1, US"failed", p-q-1) == 0)
4007 *basic_errno = ERRNO_AUTHFAIL;
4008
4009 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4010 *basic_errno = ERRNO_SMTPCLOSED;
4011
4012 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4013 *basic_errno = ERRNO_TLSREQUIRED;
4014
4015 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4016 *basic_errno = ERRNO_UNKNOWNHOST;
4017
4018 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4019 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4020
4021 return NULL;
4022 }
4023
4024
4025
4026
4027 /*************************************************
4028 * Read retry information *
4029 *************************************************/
4030
4031 /* Each line of retry information contains:
4032
4033 . A domain name pattern or an address pattern;
4034
4035 . An error name, possibly with additional data, or *;
4036
4037 . An optional sequence of retry items, each consisting of an identifying
4038 letter, a cutoff time, and optional parameters.
4039
4040 All this is decoded and placed into a control block. */
4041
4042
4043 /* Subroutine to read an argument, preceded by a comma and terminated
4044 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4045 1 = fixed point number (returned *1000).
4046
4047 Arguments:
4048 paddr pointer to pointer to current character; updated
4049 type 0 => read a time; 1 => read a fixed point number
4050
4051 Returns: time in seconds or fixed point number * 1000
4052 */
4053
4054 static int
4055 retry_arg(const uschar **paddr, int type)
4056 {
4057 const uschar *p = *paddr;
4058 const uschar *pp;
4059
4060 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4061
4062 while (isspace(*p)) p++;
4063 pp = p;
4064 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4065
4066 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4067 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4068
4069 *paddr = p;
4070 switch (type)
4071 {
4072 case 0: return readconf_readtime(pp, *p, FALSE);
4073 case 1: return readconf_readfixed(pp, *p);
4074 }
4075 return 0; /* Keep picky compilers happy */
4076 }
4077
4078 /* The function proper */
4079
4080 void
4081 readconf_retries(void)
4082 {
4083 retry_config **chain = &retries;
4084 retry_config *next;
4085 const uschar *p;
4086
4087 while ((p = get_config_line()))
4088 {
4089 retry_rule **rchain;
4090 const uschar *pp;
4091 uschar *error;
4092
4093 next = store_get(sizeof(retry_config));
4094 next->next = NULL;
4095 *chain = next;
4096 chain = &(next->next);
4097 next->basic_errno = next->more_errno = 0;
4098 next->senders = NULL;
4099 next->rules = NULL;
4100 rchain = &(next->rules);
4101
4102 next->pattern = string_dequote(&p);
4103 while (isspace(*p)) p++;
4104 pp = p;
4105 while (mac_isgraph(*p)) p++;
4106 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4107 "missing error type in retry rule");
4108
4109 /* Test error names for things we understand. */
4110
4111 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4112 &next->more_errno)))
4113 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4114
4115 /* There may be an optional address list of senders to be used as another
4116 constraint on the rule. This was added later, so the syntax is a bit of a
4117 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4118 an address list. */
4119
4120 while (isspace(*p)) p++;
4121 if (Ustrncmp(p, "senders", 7) == 0)
4122 {
4123 p += 7;
4124 while (isspace(*p)) p++;
4125 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4126 "\"=\" expected after \"senders\" in retry rule");
4127 while (isspace(*p)) p++;
4128 next->senders = string_dequote(&p);
4129 }
4130
4131 /* Now the retry rules. Keep the maximum timeout encountered. */
4132
4133 while (isspace(*p)) p++;
4134
4135 while (*p != 0)
4136 {
4137 retry_rule *rule = store_get(sizeof(retry_rule));
4138 *rchain = rule;
4139 rchain = &(rule->next);
4140 rule->next = NULL;
4141 rule->rule = toupper(*p++);
4142 rule->timeout = retry_arg(&p, 0);
4143 if (rule->timeout > retry_maximum_timeout)
4144 retry_maximum_timeout = rule->timeout;
4145
4146 switch (rule->rule)
4147 {
4148 case 'F': /* Fixed interval */
4149 rule->p1 = retry_arg(&p, 0);
4150 break;
4151
4152 case 'G': /* Geometrically increasing intervals */
4153 case 'H': /* Ditto, but with randomness */
4154 rule->p1 = retry_arg(&p, 0);
4155 rule->p2 = retry_arg(&p, 1);
4156 break;
4157
4158 default:
4159 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4160 break;
4161 }
4162
4163 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4164 (rule->rule != 'F' && rule->p2 < 1000))
4165 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4166 "bad parameters for retry rule");
4167
4168 while (isspace(*p)) p++;
4169 if (*p == ';')
4170 {
4171 p++;
4172 while (isspace(*p)) p++;
4173 }
4174 else if (*p != 0)
4175 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4176 }
4177 }
4178 }
4179
4180
4181
4182 /*************************************************
4183 * Initialize authenticators *
4184 *************************************************/
4185
4186 /* Read the authenticators section of the configuration file.
4187
4188 Arguments: none
4189 Returns: nothing
4190 */
4191
4192 static void
4193 auths_init(void)
4194 {
4195 auth_instance *au, *bu;
4196
4197 readconf_driver_init(US"authenticator",
4198 (driver_instance **)(&auths), /* chain anchor */
4199 (driver_info *)auths_available, /* available drivers */
4200 sizeof(auth_info), /* size of info block */
4201 &auth_defaults, /* default values for generic options */
4202 sizeof(auth_instance), /* size of instance block */
4203 optionlist_auths, /* generic options */
4204 optionlist_auths_size);
4205
4206 for (au = auths; au; au = au->next)
4207 {
4208 if (!au->public_name)
4209 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4210 "the %s authenticator", au->name);
4211
4212 for (bu = au->next; bu; bu = bu->next)
4213 if (strcmpic(au->public_name, bu->public_name) == 0)
4214 if ((au->client && bu->client) || (au->server && bu->server))
4215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4216 "(%s and %s) have the same public name (%s)",
4217 au->client ? US"client" : US"server", au->name, bu->name,
4218 au->public_name);
4219 }
4220 }
4221
4222
4223
4224
4225 /*************************************************
4226 * Read ACL information *
4227 *************************************************/
4228
4229 /* If this run of Exim is not doing something that involves receiving a
4230 message, we can just skip over the ACL information. No need to parse it.
4231
4232 First, we have a function for acl_read() to call back to get the next line. We
4233 need to remember the line we passed, because at the end it will contain the
4234 name of the next ACL. */
4235
4236 static uschar *acl_line;
4237
4238 static uschar *
4239 acl_callback(void)
4240 {
4241 acl_line = get_config_line();
4242 return acl_line;
4243 }
4244
4245
4246 /* Now the main function:
4247
4248 Arguments: none
4249 Returns: nothing
4250 */
4251
4252 static void
4253 readconf_acl(void)
4254 {
4255 uschar *p;
4256
4257 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4258 between ACLs. */
4259
4260 acl_line = get_config_line();
4261
4262 while(acl_line)
4263 {
4264 uschar name[64];
4265 tree_node *node;
4266 uschar *error;
4267
4268 p = readconf_readname(name, sizeof(name), acl_line);
4269 if (isupper(*name) && *p == '=')
4270 {
4271 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE, US"");
4272 acl_line = get_config_line();
4273 continue;
4274 }
4275
4276 if (*p != ':' || name[0] == 0)
4277 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4278
4279 node = store_get(sizeof(tree_node) + Ustrlen(name));
4280 Ustrcpy(node->name, name);
4281 if (!tree_insertnode(&acl_anchor, node))
4282 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4283 "there are two ACLs called \"%s\"", name);
4284
4285 node->data.ptr = acl_read(acl_callback, &error);
4286
4287 if (node->data.ptr == NULL && error != NULL)
4288 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4289 }
4290 }
4291
4292
4293
4294 /*************************************************
4295 * Read configuration for local_scan() *
4296 *************************************************/
4297
4298 /* This function is called after "begin local_scan" is encountered in the
4299 configuration file. If the local_scan() function allows for configuration
4300 options, we can process them. Otherwise, we expire in a panic.
4301
4302 Arguments: none
4303 Returns: nothing
4304 */
4305
4306 static void
4307 local_scan_init(void)
4308 {
4309 #ifndef LOCAL_SCAN_HAS_OPTIONS
4310 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4311 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4312 #else
4313
4314 uschar *p;
4315 while ((p = get_config_line()))
4316 {
4317 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4318 NULL, US"local_scan option \"%s\" unknown");
4319 }
4320 #endif
4321 }
4322
4323
4324
4325 /*************************************************
4326 * Read rest of configuration (after main) *
4327 *************************************************/
4328
4329 /* This function reads the rest of the runtime configuration, after the main
4330 configuration. It is called only when actually needed. Each subsequent section
4331 of the configuration starts with a line of the form
4332
4333 begin name
4334
4335 where the name is "routers", "transports", etc. A section is terminated by
4336 hitting the next "begin" line, and the next name is left in next_section.
4337 Because it may confuse people as to whether the names are singular or plural,
4338 we add "s" if it's missing. There is always enough room in next_section for
4339 this. This function is basically just a switch.
4340
4341 Arguments: none
4342 Returns: nothing
4343 */
4344
4345 static uschar *section_list[] = {
4346 US"acls",
4347 US"authenticators",
4348 US"local_scans",
4349 US"retrys",
4350 US"rewrites",
4351 US"routers",
4352 US"transports"};
4353
4354 void
4355 readconf_rest(void)
4356 {
4357 int had = 0;
4358
4359 while(next_section[0] != 0)
4360 {
4361 int bit;
4362 int first = 0;
4363 int last = nelem(section_list);
4364 int mid = last/2;
4365 int n = Ustrlen(next_section);
4366
4367 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4368
4369 for (;;)
4370 {
4371 int c = strcmpic(next_section, section_list[mid]);
4372 if (c == 0) break;
4373 if (c > 0) first = mid + 1; else last = mid;
4374 if (first >= last)
4375 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4376 "\"%.*s\" is not a known configuration section name", n, next_section);
4377 mid = (last + first)/2;
4378 }
4379
4380 bit = 1 << mid;
4381 if (((had ^= bit) & bit) == 0)
4382 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4383 "\"%.*s\" section is repeated in the configuration file", n,
4384 next_section);
4385
4386 switch(mid)
4387 {
4388 case 0: readconf_acl(); break;
4389 case 1: auths_init(); break;
4390 case 2: local_scan_init(); break;
4391 case 3: readconf_retries(); break;
4392 case 4: readconf_rewrites(); break;
4393 case 5: route_init(); break;
4394 case 6: transport_init(); break;
4395 }
4396 }
4397
4398 (void)fclose(config_file);
4399 }
4400
4401 /* Init the storage for the pre-parsed config lines */
4402 void
4403 readconf_save_config(const uschar *s)
4404 {
4405 save_config_line(string_sprintf("# Exim Configuration (%s)",
4406 running_in_test_harness ? US"X" : s));
4407 }
4408
4409 static void
4410 save_config_position(const uschar *file, int line)
4411 {
4412 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4413 }
4414
4415 /* Append a pre-parsed logical line to the config lines store,
4416 this operates on a global (static) list that holds all the pre-parsed
4417 config lines, we do no further processing here, output formatting and
4418 honouring of <hide> or macros will be done during output */
4419
4420 static void
4421 save_config_line(const uschar* line)
4422 {
4423 static config_line_item *current;
4424 config_line_item *next;
4425
4426 next = (config_line_item*) store_get(sizeof(config_line_item));
4427 next->line = string_copy(line);
4428 next->next = NULL;
4429
4430 if (!config_lines) config_lines = next;
4431 else current->next = next;
4432
4433 current = next;
4434 }
4435
4436 /* List the parsed config lines, care about nice formatting and
4437 hide the <hide> values unless we're the admin user */
4438 void
4439 print_config(BOOL admin, BOOL terse)
4440 {
4441 config_line_item *i;
4442 const int TS = terse ? 0 : 2;
4443 int indent = 0;
4444
4445 for (i = config_lines; i; i = i->next)
4446 {
4447 uschar *current;
4448 uschar *p;
4449
4450 /* skip over to the first non-space */
4451 for (current = i->line; *current && isspace(*current); ++current)
4452 ;
4453
4454 if (*current == '\0')
4455 continue;
4456
4457 /* Collapse runs of spaces. We stop this if we encounter one of the
4458 * following characters: "'$, as this may indicate careful formatting */
4459 for (p = current; *p; ++p)
4460 {
4461 uschar *next;
4462 if (!isspace(*p)) continue;
4463 if (*p != ' ') *p = ' ';
4464
4465 for (next = p; isspace(*next); ++next)
4466 ;
4467
4468 if (next - p > 1)
4469 memmove(p+1, next, Ustrlen(next)+1);
4470
4471 if (*next == '"' || *next == '\'' || *next == '$')
4472 break;
4473 }
4474
4475 /* # lines */
4476 if (current[0] == '#')
4477 puts(CCS current);
4478
4479 /* begin lines are left aligned */
4480 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4481 {
4482 if (!terse) puts("");
4483 puts(CCS current);
4484 indent = TS;
4485 }
4486
4487 /* router/acl/transport block names */
4488 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4489 {
4490 if (!terse) puts("");
4491 printf("%*s%s\n", TS, "", current);
4492 indent = 2 * TS;
4493 }
4494
4495 /* hidden lines (all MACROS or lines prefixed with "hide") */
4496 else if ( !admin
4497 && ( isupper(*current)
4498 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4499 )
4500 )
4501 {
4502 if ((p = Ustrchr(current, '=')))
4503 {
4504 *p = '\0';
4505 printf("%*s%s= %s\n", indent, "", current, hidden);
4506 }
4507 /* e.g.: hide split_spool_directory */
4508 else
4509 printf("%*s\n", indent, hidden);
4510 }
4511
4512 else
4513 /* rest is public */
4514 printf("%*s%s\n", indent, "", current);
4515 }
4516 }
4517
4518 #endif /*!MACRO_PREDEF*/
4519 /* vi: aw ai sw=2
4520 */
4521 /* End of readconf.c */
Unnamed repository; edit this file 'description' to name the repository.