Follow CNAME chains only one step. Bug 2264
[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 { "tls_certificate", opt_stringptr, &tls_certificate },
352 { "tls_crl", opt_stringptr, &tls_crl },
353 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
354 { "tls_dhparam", opt_stringptr, &tls_dhparam },
355 { "tls_eccurve", opt_stringptr, &tls_eccurve },
356 # ifndef DISABLE_OCSP
357 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
358 # endif
359 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
360 { "tls_privatekey", opt_stringptr, &tls_privatekey },
361 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
362 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
363 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
364 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
365 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
366 #endif
367 { "trusted_groups", opt_gidlist, &trusted_groups },
368 { "trusted_users", opt_uidlist, &trusted_users },
369 { "unknown_login", opt_stringptr, &unknown_login },
370 { "unknown_username", opt_stringptr, &unknown_username },
371 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
372 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
373 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
374 { "warn_message_file", opt_stringptr, &warn_message_file },
375 { "write_rejectlog", opt_bool, &write_rejectlog }
376 };
377
378 #ifndef MACRO_PREDEF
379 static int optionlist_config_size = nelem(optionlist_config);
380 #endif
381
382
383 #ifdef MACRO_PREDEF
384
385 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
386
387 void
388 options_main(void)
389 {
390 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
391 }
392
393 void
394 options_auths(void)
395 {
396 struct auth_info * ai;
397 uschar buf[64];
398
399 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
400
401 for (ai = auths_available; ai->driver_name[0]; ai++)
402 {
403 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
404 builtin_macro_create(buf);
405 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
406 }
407 }
408
409
410 #else /*!MACRO_PREDEF*/
411
412 extern char **environ;
413
414 static void save_config_line(const uschar* line);
415 static void save_config_position(const uschar *file, int line);
416 static void print_config(BOOL admin, BOOL terse);
417
418
419 #define CSTATE_STACK_SIZE 10
420
421 const uschar *config_directory = NULL;
422
423
424 /* Structure for chain (stack) of .included files */
425
426 typedef struct config_file_item {
427 struct config_file_item *next;
428 const uschar *filename;
429 const uschar *directory;
430 FILE *file;
431 int lineno;
432 } config_file_item;
433
434 /* Structure for chain of configuration lines (-bP config) */
435
436 typedef struct config_line_item {
437 struct config_line_item *next;
438 uschar *line;
439 } config_line_item;
440
441 static config_line_item* config_lines;
442
443 /* Structure of table of conditional words and their state transitions */
444
445 typedef struct cond_item {
446 uschar *name;
447 int namelen;
448 int action1;
449 int action2;
450 int pushpop;
451 } cond_item;
452
453 /* Structure of table of syslog facility names and values */
454
455 typedef struct syslog_fac_item {
456 uschar *name;
457 int value;
458 } syslog_fac_item;
459
460 /* constants */
461 static const char * const hidden = "<value not displayable>";
462
463 /* Static variables */
464
465 static config_file_item *config_file_stack = NULL; /* For includes */
466
467 static uschar *syslog_facility_str = NULL;
468 static uschar next_section[24];
469 static uschar time_buffer[24];
470
471 /* State variables for conditional loading (.ifdef / .else / .endif) */
472
473 static int cstate = 0;
474 static int cstate_stack_ptr = -1;
475 static int cstate_stack[CSTATE_STACK_SIZE];
476
477 /* Table of state transitions for handling conditional inclusions. There are
478 four possible state transitions:
479
480 .ifdef true
481 .ifdef false
482 .elifdef true (or .else)
483 .elifdef false
484
485 .endif just causes the previous cstate to be popped off the stack */
486
487 static int next_cstate[3][4] =
488 {
489 /* State 0: reading from file, or reading until next .else or .endif */
490 { 0, 1, 2, 2 },
491 /* State 1: condition failed, skipping until next .else or .endif */
492 { 2, 2, 0, 1 },
493 /* State 2: skipping until .endif */
494 { 2, 2, 2, 2 },
495 };
496
497 /* Table of conditionals and the states to set. For each name, there are four
498 values: the length of the name (to save computing it each time), the state to
499 set if a macro was found in the line, the state to set if a macro was not found
500 in the line, and a stack manipulation setting which is:
501
502 -1 pull state value off the stack
503 0 don't alter the stack
504 +1 push value onto stack, before setting new state
505 */
506
507 static cond_item cond_list[] = {
508 { US"ifdef", 5, 0, 1, 1 },
509 { US"ifndef", 6, 1, 0, 1 },
510 { US"elifdef", 7, 2, 3, 0 },
511 { US"elifndef", 8, 3, 2, 0 },
512 { US"else", 4, 2, 2, 0 },
513 { US"endif", 5, 0, 0, -1 }
514 };
515
516 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
517
518 /* Table of syslog facility names and their values */
519
520 static syslog_fac_item syslog_list[] = {
521 { US"mail", LOG_MAIL },
522 { US"user", LOG_USER },
523 { US"news", LOG_NEWS },
524 { US"uucp", LOG_UUCP },
525 { US"local0", LOG_LOCAL0 },
526 { US"local1", LOG_LOCAL1 },
527 { US"local2", LOG_LOCAL2 },
528 { US"local3", LOG_LOCAL3 },
529 { US"local4", LOG_LOCAL4 },
530 { US"local5", LOG_LOCAL5 },
531 { US"local6", LOG_LOCAL6 },
532 { US"local7", LOG_LOCAL7 },
533 { US"daemon", LOG_DAEMON }
534 };
535
536 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
537
538
539
540
541 /*************************************************
542 * Find the name of an option *
543 *************************************************/
544
545 /* This function is to aid debugging. Various functions take arguments that are
546 pointer variables in the options table or in option tables for various drivers.
547 For debugging output, it is useful to be able to find the name of the option
548 which is currently being processed. This function finds it, if it exists, by
549 searching the table(s).
550
551 Arguments: a value that is presumed to be in the table above
552 Returns: the option name, or an empty string
553 */
554
555 uschar *
556 readconf_find_option(void *p)
557 {
558 int i;
559 router_instance *r;
560 transport_instance *t;
561
562 for (i = 0; i < nelem(optionlist_config); i++)
563 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
564
565 for (r = routers; r; r = r->next)
566 {
567 router_info *ri = r->info;
568 for (i = 0; i < *ri->options_count; i++)
569 {
570 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
571 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
572 return US ri->options[i].name;
573 }
574 }
575
576 for (t = transports; t; t = t->next)
577 {
578 transport_info *ti = t->info;
579 for (i = 0; i < *ti->options_count; i++)
580 {
581 optionlist * op = &ti->options[i];
582 if ((op->type & opt_mask) != opt_stringptr) continue;
583 if (p == ( op->type & opt_public
584 ? CS t
585 : CS t->options_block
586 )
587 + (long int)op->value)
588 return US op->name;
589 }
590 }
591
592 return US"";
593 }
594
595
596
597
598 /*************************************************
599 * Deal with an assignment to a macro *
600 *************************************************/
601
602 /* We have a new definition; append to the list.
603
604 Args:
605 name Name of the macro; will be copied
606 val Expansion result for the macro; will be copied
607 */
608
609 macro_item *
610 macro_create(const uschar * name, const uschar * val, BOOL command_line)
611 {
612 macro_item * m = store_get(sizeof(macro_item));
613
614 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val); */
615 m->next = NULL;
616 m->command_line = command_line;
617 m->namelen = Ustrlen(name);
618 m->replen = Ustrlen(val);
619 m->name = string_copy(name);
620 m->replacement = string_copy(val);
621 if (mlast)
622 mlast->next = m;
623 else
624 macros = m;
625 mlast = m;
626 if (!macros_user)
627 macros_user = m;
628 return m;
629 }
630
631
632 /* This function is called when a line that starts with an upper case letter is
633 encountered. The argument "line" should contain a complete logical line, and
634 start with the first letter of the macro name. The macro name and the
635 replacement text are extracted and stored. Redefinition of existing,
636 non-command line, macros is permitted using '==' instead of '='.
637
638 Arguments:
639 s points to the start of the logical line
640
641 Returns: FALSE iff fatal error
642 */
643
644 BOOL
645 macro_read_assignment(uschar *s)
646 {
647 uschar name[64];
648 int namelen = 0;
649 BOOL redef = FALSE;
650 macro_item *m;
651
652 while (isalnum(*s) || *s == '_')
653 {
654 if (namelen >= sizeof(name) - 1)
655 {
656 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
657 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
658 return FALSE;
659 }
660 name[namelen++] = *s++;
661 }
662 name[namelen] = 0;
663
664 while (isspace(*s)) s++;
665 if (*s++ != '=')
666 {
667 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
668 return FALSE;
669 }
670
671 if (*s == '=')
672 {
673 redef = TRUE;
674 s++;
675 }
676 while (isspace(*s)) s++;
677
678 /* If an existing macro of the same name was defined on the command line, we
679 just skip this definition. It's an error to attempt to redefine a macro without
680 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
681 It is also an error to define a macro whose name begins with the name of a
682 previously defined macro. This is the requirement that make using a tree
683 for macros hard; we must check all macros for the substring. Perhaps a
684 sorted list, and a bsearch, would work?
685 Note: it is documented that the other way round works. */
686
687 for (m = macros; m; m = m->next)
688 {
689 if (Ustrcmp(m->name, name) == 0)
690 {
691 if (!m->command_line && !redef)
692 {
693 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
694 "defined (use \"==\" if you want to redefine it)", name);
695 return FALSE;
696 }
697 break;
698 }
699
700 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
701 {
702 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
703 "a macro because previously defined macro \"%s\" is a substring",
704 name, m->name);
705 return FALSE;
706 }
707
708 /* We cannot have this test, because it is documented that a substring
709 macro is permitted (there is even an example).
710 *
711 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
712 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
713 * "a macro because it is a substring of previously defined macro \"%s\"",
714 * name, m->name);
715 */
716 }
717
718 /* Check for an overriding command-line definition. */
719
720 if (m && m->command_line) return TRUE;
721
722 /* Redefinition must refer to an existing macro. */
723
724 if (redef)
725 if (m)
726 {
727 m->replen = Ustrlen(s);
728 m->replacement = string_copy(s);
729 }
730 else
731 {
732 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
733 "\"%s\"", name);
734 return FALSE;
735 }
736
737 /* We have a new definition. */
738 else
739 (void) macro_create(name, s, FALSE);
740 return TRUE;
741 }
742
743
744
745
746
747 /* Process line for macros. The line is in big_buffer starting at offset len.
748 Expand big_buffer if needed. Handle definitions of new macros, and
749 macro expansions, rewriting the line in the buffer.
750
751 Arguments:
752 len Offset in buffer of start of line
753 newlen Pointer to offset of end of line, updated on return
754 macro_found Pointer to return that a macro was expanded
755
756 Return: pointer to first nonblank char in line
757 */
758
759 uschar *
760 macros_expand(int len, int * newlen, BOOL * macro_found)
761 {
762 uschar * ss = big_buffer + len;
763 uschar * s;
764 macro_item * m;
765
766 /* Find the true start of the physical line - leading spaces are always
767 ignored. */
768
769 while (isspace(*ss)) ss++;
770
771 /* Process the physical line for macros. If this is the start of the logical
772 line, skip over initial text at the start of the line if it starts with an
773 upper case character followed by a sequence of name characters and an equals
774 sign, because that is the definition of a new macro, and we don't do
775 replacement therein. */
776
777 s = ss;
778 if (len == 0 && isupper(*s))
779 {
780 while (isalnum(*s) || *s == '_') s++;
781 while (isspace(*s)) s++;
782 if (*s != '=') s = ss; /* Not a macro definition */
783 }
784
785 /* Skip leading chars which cannot start a macro name, to avoid multiple
786 pointless rescans in Ustrstr calls. */
787
788 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
789
790 /* For each defined macro, scan the line (from after XXX= if present),
791 replacing all occurrences of the macro. */
792
793 *macro_found = FALSE;
794 if (*s) for (m = *s == '_' ? macros : macros_user; m; m = m->next)
795 {
796 uschar * p, *pp;
797 uschar * t;
798
799 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
800 if (!*s) break;
801
802 t = s;
803 while ((p = Ustrstr(t, m->name)) != NULL)
804 {
805 int moveby;
806
807 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, ss); */
808 /* Expand the buffer if necessary */
809
810 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
811 {
812 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
813 uschar *newbuffer = store_malloc(newsize);
814 memcpy(newbuffer, big_buffer, *newlen + 1);
815 p = newbuffer + (p - big_buffer);
816 s = newbuffer + (s - big_buffer);
817 ss = newbuffer + (ss - big_buffer);
818 t = newbuffer + (t - big_buffer);
819 big_buffer_size = newsize;
820 store_free(big_buffer);
821 big_buffer = newbuffer;
822 }
823
824 /* Shuffle the remaining characters up or down in the buffer before
825 copying in the replacement text. Don't rescan the replacement for this
826 same macro. */
827
828 pp = p + m->namelen;
829 if ((moveby = m->replen - m->namelen) != 0)
830 {
831 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
832 *newlen += moveby;
833 }
834 Ustrncpy(p, m->replacement, m->replen);
835 t = p + m->replen;
836 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
837 *macro_found = TRUE;
838 }
839 }
840
841 /* An empty macro replacement at the start of a line could mean that ss no
842 longer points to the first non-blank character. */
843
844 while (isspace(*ss)) ss++;
845 return ss;
846 }
847
848 /*************************************************
849 * Read configuration line *
850 *************************************************/
851
852 /* A logical line of text is read from the configuration file into the big
853 buffer, taking account of macros, .includes, and continuations. The size of
854 big_buffer is increased if necessary. The count of configuration lines is
855 maintained. Physical input lines starting with # (ignoring leading white space,
856 and after macro replacement) and empty logical lines are always ignored.
857 Leading and trailing spaces are removed.
858
859 If we hit a line of the form "begin xxxx", the xxxx is placed in the
860 next_section vector, and the function returns NULL, indicating the end of a
861 configuration section. On end-of-file, NULL is returned with next_section
862 empty.
863
864 Arguments: none
865
866 Returns: a pointer to the first non-blank in the line,
867 or NULL if eof or end of section is reached
868 */
869
870 static uschar *
871 get_config_line(void)
872 {
873 int startoffset = 0; /* To first non-blank char in logical line */
874 int len = 0; /* Of logical line so far */
875 int newlen;
876 uschar *s, *ss;
877 BOOL macro_found;
878
879 /* Loop for handling continuation lines, skipping comments, and dealing with
880 .include files. */
881
882 for (;;)
883 {
884 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
885 {
886 if (config_file_stack != NULL) /* EOF inside .include */
887 {
888 (void)fclose(config_file);
889 config_file = config_file_stack->file;
890 config_filename = config_file_stack->filename;
891 config_directory = config_file_stack->directory;
892 config_lineno = config_file_stack->lineno;
893 config_file_stack = config_file_stack->next;
894 if (config_lines)
895 save_config_position(config_filename, config_lineno);
896 continue;
897 }
898
899 /* EOF at top level */
900
901 if (cstate_stack_ptr >= 0)
902 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
903 "Unexpected end of configuration file: .endif missing");
904
905 if (len != 0) break; /* EOF after continuation */
906 next_section[0] = 0; /* EOF at start of logical line */
907 return NULL;
908 }
909
910 config_lineno++;
911 newlen = len + Ustrlen(big_buffer + len);
912
913 if (config_lines && config_lineno == 1)
914 save_config_position(config_filename, config_lineno);
915
916 /* Handle pathologically long physical lines - yes, it did happen - by
917 extending big_buffer at this point. The code also copes with very long
918 logical lines. */
919
920 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
921 {
922 uschar *newbuffer;
923 big_buffer_size += BIG_BUFFER_SIZE;
924 newbuffer = store_malloc(big_buffer_size);
925
926 /* This use of strcpy is OK because we know that the string in the old
927 buffer is shorter than the new buffer. */
928
929 Ustrcpy(newbuffer, big_buffer);
930 store_free(big_buffer);
931 big_buffer = newbuffer;
932 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
933 break;
934 newlen += Ustrlen(big_buffer + newlen);
935 }
936
937 ss = macros_expand(len, &newlen, &macro_found);
938
939 /* Check for comment lines - these are physical lines. */
940
941 if (*ss == '#') continue;
942
943 /* Handle conditionals, which are also applied to physical lines. Conditions
944 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
945 expansion occured on the rest of the line. A preliminary test for the leading
946 '.' saves effort on most lines. */
947
948 if (*ss == '.')
949 {
950 int i;
951
952 /* Search the list of conditional directives */
953
954 for (i = 0; i < cond_list_size; i++)
955 {
956 int n;
957 cond_item *c = cond_list+i;
958 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
959
960 /* The following character must be white space or end of string */
961
962 n = ss[1 + c->namelen];
963 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
964
965 /* .ifdef and .ifndef push the current state onto the stack, then set
966 a new one from the table. Stack overflow is an error */
967
968 if (c->pushpop > 0)
969 {
970 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
971 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
972 ".%s nested too deeply", c->name);
973 cstate_stack[++cstate_stack_ptr] = cstate;
974 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
975 }
976
977 /* For any of the others, stack underflow is an error. The next state
978 comes either from the stack (.endif) or from the table. */
979
980 else
981 {
982 if (cstate_stack_ptr < 0)
983 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
984 ".%s without matching .ifdef", c->name);
985 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
986 next_cstate[cstate][macro_found? c->action1 : c->action2];
987 }
988
989 /* Having dealt with a directive, break the loop */
990
991 break;
992 }
993
994 /* If we have handled a conditional directive, continue with the next
995 physical line. Otherwise, fall through. */
996
997 if (i < cond_list_size) continue;
998 }
999
1000 /* If the conditional state is not 0 (actively using these lines), ignore
1001 this input line. */
1002
1003 if (cstate != 0) continue; /* Conditional skip */
1004
1005 /* Handle .include lines - these are also physical lines. */
1006
1007 if (Ustrncmp(ss, ".include", 8) == 0 &&
1008 (isspace(ss[8]) ||
1009 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1010 {
1011 uschar *t;
1012 int include_if_exists = isspace(ss[8])? 0 : 10;
1013 config_file_item *save;
1014 struct stat statbuf;
1015
1016 ss += 9 + include_if_exists;
1017 while (isspace(*ss)) ss++;
1018 t = ss + Ustrlen(ss);
1019 while (t > ss && isspace(t[-1])) t--;
1020 if (*ss == '\"' && t[-1] == '\"')
1021 {
1022 ss++;
1023 t--;
1024 }
1025 *t = 0;
1026
1027 /* We allow relative file names. For security reasons currently
1028 relative names not allowed with .include_if_exists. For .include_if_exists
1029 we need to check the permissions/ownership of the containing folder */
1030 if (*ss != '/')
1031 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1032 "absolute path \"%s\"", ss);
1033 else
1034 {
1035 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1036 ss = string_from_gstring(g);
1037 }
1038
1039 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1040
1041 if (config_lines)
1042 save_config_position(config_filename, config_lineno);
1043 save = store_get(sizeof(config_file_item));
1044 save->next = config_file_stack;
1045 config_file_stack = save;
1046 save->file = config_file;
1047 save->filename = config_filename;
1048 save->directory = config_directory;
1049 save->lineno = config_lineno;
1050
1051 if (!(config_file = Ufopen(ss, "rb")))
1052 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1053 "configuration file %s", ss);
1054
1055 config_filename = string_copy(ss);
1056 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1057 config_lineno = 0;
1058 continue;
1059 }
1060
1061 /* If this is the start of the logical line, remember where the non-blank
1062 data starts. Otherwise shuffle down continuation lines to remove leading
1063 white space. */
1064
1065 if (len == 0)
1066 startoffset = ss - big_buffer;
1067 else
1068 {
1069 s = big_buffer + len;
1070 if (ss > s)
1071 {
1072 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1073 newlen -= ss - s;
1074 }
1075 }
1076
1077 /* Accept the new addition to the line. Remove trailing white space. */
1078
1079 len = newlen;
1080 while (len > 0 && isspace(big_buffer[len-1])) len--;
1081 big_buffer[len] = 0;
1082
1083 /* We are done if the line does not end in backslash and contains some data.
1084 Empty logical lines are ignored. For continuations, remove the backslash and
1085 go round the loop to read the continuation line. */
1086
1087 if (len > 0)
1088 {
1089 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1090 big_buffer[--len] = 0; /* Remove backslash */
1091 }
1092 } /* Loop for reading multiple physical lines */
1093
1094 /* We now have a logical line. Test for the end of a configuration section (or,
1095 more accurately, for the start of the next section). Place the name of the next
1096 section in next_section, and return NULL. If the name given is longer than
1097 next_section, truncate it. It will be unrecognized later, because all the known
1098 section names do fit. Leave space for pluralizing. */
1099
1100 s = big_buffer + startoffset; /* First non-space character */
1101
1102 if (config_lines)
1103 save_config_line(s);
1104
1105 if (strncmpic(s, US"begin ", 6) == 0)
1106 {
1107 s += 6;
1108 while (isspace(*s)) s++;
1109 if (big_buffer + len - s > sizeof(next_section) - 2)
1110 s[sizeof(next_section) - 2] = 0;
1111 Ustrcpy(next_section, s);
1112 return NULL;
1113 }
1114
1115 /* Return the first non-blank character. */
1116
1117 return s;
1118 }
1119
1120
1121
1122 /*************************************************
1123 * Read a name *
1124 *************************************************/
1125
1126 /* The yield is the pointer to the next uschar. Names longer than the
1127 output space are silently truncated. This function is also used from acl.c when
1128 parsing ACLs.
1129
1130 Arguments:
1131 name where to put the name
1132 len length of name
1133 s input pointer
1134
1135 Returns: new input pointer
1136 */
1137
1138 uschar *
1139 readconf_readname(uschar *name, int len, uschar *s)
1140 {
1141 int p = 0;
1142 while (isspace(*s)) s++;
1143 if (isalpha(*s))
1144 {
1145 while (isalnum(*s) || *s == '_')
1146 {
1147 if (p < len-1) name[p++] = *s;
1148 s++;
1149 }
1150 }
1151 name[p] = 0;
1152 while (isspace(*s)) s++;
1153 return s;
1154 }
1155
1156
1157
1158
1159 /*************************************************
1160 * Read a time value *
1161 *************************************************/
1162
1163 /* This function is also called from outside, to read argument
1164 time values. The format of a time value is:
1165
1166 [<n>w][<n>d][<n>h][<n>m][<n>s]
1167
1168 as long as at least one is present. If a format error is encountered,
1169 return a negative value. The value must be terminated by the given
1170 terminator.
1171
1172 Arguments:
1173 s input pointer
1174 terminator required terminating character
1175 return_msec if TRUE, allow fractional seconds and return milliseconds
1176
1177 Returns: the time value, or -1 on syntax error
1178 value is seconds if return_msec is FALSE
1179 value is milliseconds if return_msec is TRUE
1180 */
1181
1182 int
1183 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1184 {
1185 int yield = 0;
1186 for (;;)
1187 {
1188 int value, count;
1189 double fraction;
1190
1191 if (!isdigit(*s)) return -1;
1192 (void)sscanf(CCS s, "%d%n", &value, &count);
1193 s += count;
1194
1195 switch (*s)
1196 {
1197 case 'w': value *= 7;
1198 case 'd': value *= 24;
1199 case 'h': value *= 60;
1200 case 'm': value *= 60;
1201 case 's': s++;
1202 break;
1203
1204 case '.':
1205 if (!return_msec) return -1;
1206 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1207 s += count;
1208 if (*s++ != 's') return -1;
1209 yield += (int)(fraction * 1000.0);
1210 break;
1211
1212 default: return -1;
1213 }
1214
1215 if (return_msec) value *= 1000;
1216 yield += value;
1217 if (*s == terminator) return yield;
1218 }
1219 /* Control never reaches here. */
1220 }
1221
1222
1223
1224 /*************************************************
1225 * Read a fixed point value *
1226 *************************************************/
1227
1228 /* The value is returned *1000
1229
1230 Arguments:
1231 s input pointer
1232 terminator required terminator
1233
1234 Returns: the value, or -1 on error
1235 */
1236
1237 static int
1238 readconf_readfixed(const uschar *s, int terminator)
1239 {
1240 int yield = 0;
1241 int value, count;
1242 if (!isdigit(*s)) return -1;
1243 (void)sscanf(CS s, "%d%n", &value, &count);
1244 s += count;
1245 yield = value * 1000;
1246 if (*s == '.')
1247 {
1248 int m = 100;
1249 while (isdigit((*(++s))))
1250 {
1251 yield += (*s - '0') * m;
1252 m /= 10;
1253 }
1254 }
1255
1256 return (*s == terminator)? yield : (-1);
1257 }
1258
1259
1260
1261 /*************************************************
1262 * Find option in list *
1263 *************************************************/
1264
1265 /* The lists are always in order, so binary chop can be used.
1266
1267 Arguments:
1268 name the option name to search for
1269 ol the first entry in the option list
1270 last one more than the offset of the last entry in the option list
1271
1272 Returns: pointer to an option entry, or NULL if not found
1273 */
1274
1275 static optionlist *
1276 find_option(uschar *name, optionlist *ol, int last)
1277 {
1278 int first = 0;
1279 while (last > first)
1280 {
1281 int middle = (first + last)/2;
1282 int c = Ustrcmp(name, ol[middle].name);
1283
1284 if (c == 0) return ol + middle;
1285 else if (c > 0) first = middle + 1;
1286 else last = middle;
1287 }
1288 return NULL;
1289 }
1290
1291
1292
1293 /*************************************************
1294 * Find a set flag in option list *
1295 *************************************************/
1296
1297 /* Because some versions of Unix make no restrictions on the values of uids and
1298 gids (even negative ones), we cannot represent "unset" by a special value.
1299 There is therefore a separate boolean variable for each one indicating whether
1300 a value is set or not. This function returns a pointer to the boolean, given
1301 the original option name. It is a major disaster if the flag cannot be found.
1302
1303 Arguments:
1304 name the name of the uid or gid option
1305 oltop points to the start of the relevant option list
1306 last one more than the offset of the last item in the option list
1307 data_block NULL when reading main options => data values in the option
1308 list are absolute addresses; otherwise they are byte offsets
1309 in data_block (used for driver options)
1310
1311 Returns: a pointer to the boolean flag.
1312 */
1313
1314 static BOOL *
1315 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1316 {
1317 optionlist *ol;
1318 uschar name2[64];
1319 sprintf(CS name2, "*set_%.50s", name);
1320 ol = find_option(name2, oltop, last);
1321 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1322 "Exim internal error: missing set flag for %s", name);
1323 return (data_block == NULL)? (BOOL *)(ol->value) :
1324 (BOOL *)(US data_block + (long int)(ol->value));
1325 }
1326
1327
1328
1329
1330 /*************************************************
1331 * Output extra characters message and die *
1332 *************************************************/
1333
1334 /* Called when an option line has junk on the end. Sometimes this is because
1335 the sysadmin thinks comments are permitted.
1336
1337 Arguments:
1338 s points to the extra characters
1339 t1..t3 strings to insert in the log message
1340
1341 Returns: doesn't return; dies
1342 */
1343
1344 static void
1345 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1346 {
1347 uschar *comment = US"";
1348 if (*s == '#') comment = US" (# is comment only at line start)";
1349 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1350 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1351 }
1352
1353
1354
1355 /*************************************************
1356 * Read rewrite information *
1357 *************************************************/
1358
1359 /* Each line of rewrite information contains:
1360
1361 . A complete address in the form user@domain, possibly with
1362 leading * for each part; or alternatively, a regex.
1363
1364 . A replacement string (which will be expanded).
1365
1366 . An optional sequence of one-letter flags, indicating which
1367 headers etc. to apply this rule to.
1368
1369 All this is decoded and placed into a control block. The OR of the flags is
1370 maintained in a common word.
1371
1372 Arguments:
1373 p points to the string that makes up the rule
1374 existflags points to the overall flag word
1375 isglobal TRUE if reading global rewrite rules
1376
1377 Returns: the control block for the parsed rule.
1378 */
1379
1380 static rewrite_rule *
1381 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1382 {
1383 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1384
1385 next->next = NULL;
1386 next->key = string_dequote(&p);
1387
1388 while (isspace(*p)) p++;
1389 if (*p == 0)
1390 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1391 "missing rewrite replacement string");
1392
1393 next->flags = 0;
1394 next->replacement = string_dequote(&p);
1395
1396 while (*p != 0) switch (*p++)
1397 {
1398 case ' ': case '\t': break;
1399
1400 case 'q': next->flags |= rewrite_quit; break;
1401 case 'w': next->flags |= rewrite_whole; break;
1402
1403 case 'h': next->flags |= rewrite_all_headers; break;
1404 case 's': next->flags |= rewrite_sender; break;
1405 case 'f': next->flags |= rewrite_from; break;
1406 case 't': next->flags |= rewrite_to; break;
1407 case 'c': next->flags |= rewrite_cc; break;
1408 case 'b': next->flags |= rewrite_bcc; break;
1409 case 'r': next->flags |= rewrite_replyto; break;
1410
1411 case 'E': next->flags |= rewrite_all_envelope; break;
1412 case 'F': next->flags |= rewrite_envfrom; break;
1413 case 'T': next->flags |= rewrite_envto; break;
1414
1415 case 'Q': next->flags |= rewrite_qualify; break;
1416 case 'R': next->flags |= rewrite_repeat; break;
1417
1418 case 'S':
1419 next->flags |= rewrite_smtp;
1420 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1422 "rewrite rule has the S flag but is not a regular expression");
1423 break;
1424
1425 default:
1426 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1427 "unknown rewrite flag character '%c' "
1428 "(could be missing quotes round replacement item)", p[-1]);
1429 break;
1430 }
1431
1432 /* If no action flags are set, set all the "normal" rewrites. */
1433
1434 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1435 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1436
1437 /* Remember which exist, for optimization, and return the rule */
1438
1439 *existflags |= next->flags;
1440 return next;
1441 }
1442
1443
1444
1445
1446 /*************************************************
1447 * Read global rewrite information *
1448 *************************************************/
1449
1450 /* Each line is a single rewrite rule; it is parsed into a control block
1451 by readconf_one_rewrite(), and its flags are ORed into the global flag
1452 word rewrite_existflags. */
1453
1454 void
1455 readconf_rewrites(void)
1456 {
1457 rewrite_rule **chain = &global_rewrite_rules;
1458 uschar *p;
1459
1460 while ((p = get_config_line()) != NULL)
1461 {
1462 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1463 *chain = next;
1464 chain = &(next->next);
1465 }
1466 }
1467
1468
1469
1470 /*************************************************
1471 * Read a string *
1472 *************************************************/
1473
1474 /* Strings are read into the normal store pool. As long we aren't too
1475 near the end of the current block, the string will just use what is necessary
1476 on the top of the stacking pool, because string_cat() uses the extension
1477 mechanism.
1478
1479 Argument:
1480 s the rest of the input line
1481 name the option name (for errors)
1482
1483 Returns: pointer to the string
1484 */
1485
1486 static uschar *
1487 read_string(const uschar *s, const uschar *name)
1488 {
1489 uschar *yield;
1490 const uschar *ss;
1491
1492 if (*s != '\"') return string_copy(s);
1493
1494 ss = s;
1495 yield = string_dequote(&s);
1496
1497 if (s == ss+1 || s[-1] != '\"')
1498 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1499 "missing quote at end of string value for %s", name);
1500
1501 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1502
1503 return yield;
1504 }
1505
1506
1507 /*************************************************
1508 * Custom-handler options *
1509 *************************************************/
1510 static void
1511 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1512 {
1513 if (*str == '$')
1514 smtp_receive_timeout_s = string_copy(str);
1515 else
1516 {
1517 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1518 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1519 if (smtp_receive_timeout < 0)
1520 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1521 name);
1522 }
1523 }
1524
1525 /*************************************************
1526 * Handle option line *
1527 *************************************************/
1528
1529 /* This function is called from several places to process a line containing the
1530 setting of an option. The first argument is the line to be decoded; it has been
1531 checked not to be empty and not to start with '#'. Trailing newlines and white
1532 space have been removed. The second argument is a pointer to the list of
1533 variable names that are to be recognized, together with their types and
1534 locations, and the third argument gives the number of entries in the list.
1535
1536 The fourth argument is a pointer to a data block. If it is NULL, then the data
1537 values in the options list are absolute addresses. Otherwise, they are byte
1538 offsets in the data block.
1539
1540 String option data may continue onto several lines; this function reads further
1541 data from config_file if necessary.
1542
1543 The yield of this function is normally zero. If a string continues onto
1544 multiple lines, then the data value is permitted to be followed by a comma
1545 or a semicolon (for use in drivers) and the yield is that character.
1546
1547 Arguments:
1548 buffer contains the configuration line to be handled
1549 oltop points to the start of the relevant option list
1550 last one more than the offset of the last item in the option list
1551 data_block NULL when reading main options => data values in the option
1552 list are absolute addresses; otherwise they are byte offsets
1553 in data_block when they have opt_public set; otherwise
1554 they are byte offsets in data_block->options_block.
1555 unknown_txt format string to use in panic message for unknown option;
1556 must contain %s for option name
1557 if given as NULL, don't panic on unknown option
1558
1559 Returns: TRUE if an option was read successfully,
1560 FALSE false for an unknown option if unknown_txt == NULL,
1561 otherwise panic and die on an unknown option
1562 */
1563
1564 static BOOL
1565 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1566 void *data_block, uschar *unknown_txt)
1567 {
1568 int ptr = 0;
1569 int offset = 0;
1570 int n, count, type, value;
1571 int issecure = 0;
1572 uid_t uid;
1573 gid_t gid;
1574 BOOL boolvalue = TRUE;
1575 BOOL freesptr = TRUE;
1576 optionlist *ol, *ol2;
1577 struct passwd *pw;
1578 void *reset_point;
1579 int intbase = 0;
1580 uschar *inttype = US"";
1581 uschar *sptr;
1582 uschar *s = buffer;
1583 uschar **str_target;
1584 uschar name[64];
1585 uschar name2[64];
1586
1587 /* There may be leading spaces; thereafter, we expect an option name starting
1588 with a letter. */
1589
1590 while (isspace(*s)) s++;
1591 if (!isalpha(*s))
1592 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1593
1594 /* Read the name of the option, and skip any subsequent white space. If
1595 it turns out that what we read was "hide", set the flag indicating that
1596 this is a secure option, and loop to read the next word. */
1597
1598 for (n = 0; n < 2; n++)
1599 {
1600 while (isalnum(*s) || *s == '_')
1601 {
1602 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1603 s++;
1604 }
1605 name[ptr] = 0;
1606 while (isspace(*s)) s++;
1607 if (Ustrcmp(name, "hide") != 0) break;
1608 issecure = opt_secure;
1609 ptr = 0;
1610 }
1611
1612 /* Deal with "no_" or "not_" here for booleans */
1613
1614 if (Ustrncmp(name, "no_", 3) == 0)
1615 {
1616 boolvalue = FALSE;
1617 offset = 3;
1618 }
1619
1620 if (Ustrncmp(name, "not_", 4) == 0)
1621 {
1622 boolvalue = FALSE;
1623 offset = 4;
1624 }
1625
1626 /* Search the list for the given name. A non-existent name, or an option that
1627 is set twice, is a disaster. */
1628
1629 if (!(ol = find_option(name + offset, oltop, last)))
1630 {
1631 if (unknown_txt == NULL) return FALSE;
1632 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1633 }
1634
1635 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1636 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1637 "\"%s\" option set for the second time", name);
1638
1639 ol->type |= opt_set | issecure;
1640 type = ol->type & opt_mask;
1641
1642 /* Types with data values must be followed by '='; the "no[t]_" prefix
1643 applies only to boolean values. */
1644
1645 if (type < opt_bool || type > opt_bool_last)
1646 {
1647 if (offset != 0)
1648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1649 "negation prefix applied to a non-boolean option");
1650 if (*s == 0)
1651 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1652 "unexpected end of line (data missing) after %s", name);
1653 if (*s != '=')
1654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1655 }
1656
1657 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1658 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1659 ultimately expands to one of those values. */
1660
1661 else if (*s != 0 && (offset != 0 || *s != '='))
1662 extra_chars_error(s, US"boolean option ", name, US"");
1663
1664 /* Skip white space after = */
1665
1666 if (*s == '=') while (isspace((*(++s))));
1667
1668 /* If there is a data block and the opt_public flag is not set, change
1669 the data block pointer to the private options block. */
1670
1671 if (data_block != NULL && (ol->type & opt_public) == 0)
1672 data_block = (void *)(((driver_instance *)data_block)->options_block);
1673
1674 /* Now get the data according to the type. */
1675
1676 switch (type)
1677 {
1678 /* If a string value is not enclosed in quotes, it consists of
1679 the rest of the current line, verbatim. Otherwise, string escapes
1680 are processed.
1681
1682 A transport is specified as a string, which is then looked up in the
1683 list of transports. A search type is specified as one of a number of
1684 known strings.
1685
1686 A set or rewrite rules for a driver is specified as a string, which is
1687 then parsed into a suitable chain of control blocks.
1688
1689 Uids and gids are specified as strings which are then looked up in the
1690 passwd file. Lists of uids and gids are similarly specified as colon-
1691 separated strings. */
1692
1693 case opt_stringptr:
1694 case opt_uid:
1695 case opt_gid:
1696 case opt_expand_uid:
1697 case opt_expand_gid:
1698 case opt_uidlist:
1699 case opt_gidlist:
1700 case opt_rewrite:
1701
1702 reset_point = sptr = read_string(s, name);
1703
1704 /* Having read a string, we now have several different ways of using it,
1705 depending on the data type, so do another switch. If keeping the actual
1706 string is not required (because it is interpreted), freesptr is set TRUE,
1707 and at the end we reset the pool. */
1708
1709 switch (type)
1710 {
1711 /* If this was a string, set the variable to point to the new string,
1712 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1713 rules, we still keep the string (for printing), and parse the rules into a
1714 control block and flags word. */
1715
1716 case opt_stringptr:
1717 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1718 : USS (ol->value);
1719 if (ol->type & opt_rep_con)
1720 {
1721 uschar * saved_condition;
1722 /* We already have a condition, we're conducting a crude hack to let
1723 multiple condition rules be chained together, despite storing them in
1724 text form. */
1725 *str_target = string_copy_malloc( (saved_condition = *str_target)
1726 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1727 saved_condition, sptr)
1728 : sptr);
1729 /* TODO(pdp): there is a memory leak here and just below
1730 when we set 3 or more conditions; I still don't
1731 understand the store mechanism enough to know
1732 what's the safe way to free content from an earlier store.
1733 AFAICT, stores stack, so freeing an early stored item also stores
1734 all data alloc'd after it. If we knew conditions were adjacent,
1735 we could survive that, but we don't. So I *think* we need to take
1736 another bit from opt_type to indicate "malloced"; this seems like
1737 quite a hack, especially for this one case. It also means that
1738 we can't ever reclaim the store from the *first* condition.
1739
1740 Because we only do this once, near process start-up, I'm prepared to
1741 let this slide for the time being, even though it rankles. */
1742 }
1743 else if (ol->type & opt_rep_str)
1744 {
1745 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1746 int sep_i = -(int)sep_o;
1747 const uschar * list = sptr;
1748 uschar * s;
1749 gstring * list_o = NULL;
1750
1751 if (*str_target)
1752 {
1753 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1754 list_o = string_cat(list_o, *str_target);
1755 }
1756
1757 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1758 list_o = string_append_listele(list_o, sep_o, s);
1759
1760 if (list_o)
1761 *str_target = string_copy_malloc(string_from_gstring(list_o));
1762 }
1763 else
1764 {
1765 *str_target = sptr;
1766 freesptr = FALSE;
1767 }
1768 break;
1769
1770 case opt_rewrite:
1771 if (data_block)
1772 *USS (US data_block + (long int)(ol->value)) = sptr;
1773 else
1774 *USS (ol->value) = sptr;
1775 freesptr = FALSE;
1776 if (type == opt_rewrite)
1777 {
1778 int sep = 0;
1779 int *flagptr;
1780 uschar *p = sptr;
1781 rewrite_rule **chain;
1782 optionlist *ol3;
1783
1784 sprintf(CS name2, "*%.50s_rules", name);
1785 ol2 = find_option(name2, oltop, last);
1786 sprintf(CS name2, "*%.50s_flags", name);
1787 ol3 = find_option(name2, oltop, last);
1788
1789 if (ol2 == NULL || ol3 == NULL)
1790 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1791 "rewrite rules not available for driver");
1792
1793 if (data_block == NULL)
1794 {
1795 chain = (rewrite_rule **)(ol2->value);
1796 flagptr = (int *)(ol3->value);
1797 }
1798 else
1799 {
1800 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1801 flagptr = (int *)(US data_block + (long int)(ol3->value));
1802 }
1803
1804 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1805 {
1806 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1807 *chain = next;
1808 chain = &(next->next);
1809 }
1810
1811 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1812 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1813 "non-header rewrite - not allowed at transport time -");
1814 }
1815 break;
1816
1817 /* If it was an expanded uid, see if there is any expansion to be
1818 done by checking for the presence of a $ character. If there is, save it
1819 in the corresponding *expand_user option field. Otherwise, fall through
1820 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1821 of data. */
1822
1823 case opt_expand_uid:
1824 sprintf(CS name2, "*expand_%.50s", name);
1825 ol2 = find_option(name2, oltop, last);
1826 if (ol2 != NULL)
1827 {
1828 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1829
1830 if (data_block == NULL)
1831 *((uschar **)(ol2->value)) = ss;
1832 else
1833 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1834
1835 if (ss != NULL)
1836 {
1837 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1838 freesptr = FALSE;
1839 break;
1840 }
1841 }
1842
1843 /* Look up a fixed uid, and also make use of the corresponding gid
1844 if a passwd entry is returned and the gid has not been set. */
1845
1846 case opt_uid:
1847 if (!route_finduser(sptr, &pw, &uid))
1848 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1849 if (data_block == NULL)
1850 *((uid_t *)(ol->value)) = uid;
1851 else
1852 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1853
1854 /* Set the flag indicating a fixed value is set */
1855
1856 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1857
1858 /* Handle matching gid if we have a passwd entry: done by finding the
1859 same name with terminating "user" changed to "group"; if not found,
1860 ignore. Also ignore if the value is already set. */
1861
1862 if (pw == NULL) break;
1863 Ustrcpy(name+Ustrlen(name)-4, "group");
1864 ol2 = find_option(name, oltop, last);
1865 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1866 (ol2->type & opt_mask) == opt_expand_gid))
1867 {
1868 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1869 if (! *set_flag)
1870 {
1871 if (data_block == NULL)
1872 *((gid_t *)(ol2->value)) = pw->pw_gid;
1873 else
1874 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1875 *set_flag = TRUE;
1876 }
1877 }
1878 break;
1879
1880 /* If it was an expanded gid, see if there is any expansion to be
1881 done by checking for the presence of a $ character. If there is, save it
1882 in the corresponding *expand_user option field. Otherwise, fall through
1883 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1884 of data. */
1885
1886 case opt_expand_gid:
1887 sprintf(CS name2, "*expand_%.50s", name);
1888 ol2 = find_option(name2, oltop, last);
1889 if (ol2 != NULL)
1890 {
1891 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1892
1893 if (data_block == NULL)
1894 *((uschar **)(ol2->value)) = ss;
1895 else
1896 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1897
1898 if (ss != NULL)
1899 {
1900 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1901 freesptr = FALSE;
1902 break;
1903 }
1904 }
1905
1906 /* Handle freestanding gid */
1907
1908 case opt_gid:
1909 if (!route_findgroup(sptr, &gid))
1910 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1911 if (data_block == NULL)
1912 *((gid_t *)(ol->value)) = gid;
1913 else
1914 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1915 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1916 break;
1917
1918 /* If it was a uid list, look up each individual entry, and build
1919 a vector of uids, with a count in the first element. Put the vector
1920 in malloc store so we can free the string. (We are reading into
1921 permanent store already.) */
1922
1923 case opt_uidlist:
1924 {
1925 int count = 1;
1926 uid_t *list;
1927 int ptr = 0;
1928 const uschar *p;
1929 const uschar *op = expand_string (sptr);
1930
1931 if (op == NULL)
1932 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1933 name, expand_string_message);
1934
1935 p = op;
1936 if (*p != 0) count++;
1937 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1938 list = store_malloc(count*sizeof(uid_t));
1939 list[ptr++] = (uid_t)(count - 1);
1940
1941 if (data_block == NULL)
1942 *((uid_t **)(ol->value)) = list;
1943 else
1944 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1945
1946 p = op;
1947 while (count-- > 1)
1948 {
1949 int sep = 0;
1950 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1951 if (!route_finduser(big_buffer, NULL, &uid))
1952 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1953 big_buffer);
1954 list[ptr++] = uid;
1955 }
1956 }
1957 break;
1958
1959 /* If it was a gid list, look up each individual entry, and build
1960 a vector of gids, with a count in the first element. Put the vector
1961 in malloc store so we can free the string. (We are reading into permanent
1962 store already.) */
1963
1964 case opt_gidlist:
1965 {
1966 int count = 1;
1967 gid_t *list;
1968 int ptr = 0;
1969 const uschar *p;
1970 const uschar *op = expand_string (sptr);
1971
1972 if (op == NULL)
1973 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1974 name, expand_string_message);
1975
1976 p = op;
1977 if (*p != 0) count++;
1978 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1979 list = store_malloc(count*sizeof(gid_t));
1980 list[ptr++] = (gid_t)(count - 1);
1981
1982 if (data_block == NULL)
1983 *((gid_t **)(ol->value)) = list;
1984 else
1985 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
1986
1987 p = op;
1988 while (count-- > 1)
1989 {
1990 int sep = 0;
1991 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1992 if (!route_findgroup(big_buffer, &gid))
1993 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1994 big_buffer);
1995 list[ptr++] = gid;
1996 }
1997 }
1998 break;
1999 }
2000
2001 /* Release store if the value of the string doesn't need to be kept. */
2002
2003 if (freesptr) store_reset(reset_point);
2004 break;
2005
2006 /* Expanded boolean: if no characters follow, or if there are no dollar
2007 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2008 save the string for later expansion in the alternate place. */
2009
2010 case opt_expand_bool:
2011 if (*s != 0 && Ustrchr(s, '$') != 0)
2012 {
2013 sprintf(CS name2, "*expand_%.50s", name);
2014 ol2 = find_option(name2, oltop, last);
2015 if (ol2 != NULL)
2016 {
2017 reset_point = sptr = read_string(s, name);
2018 if (data_block == NULL)
2019 *((uschar **)(ol2->value)) = sptr;
2020 else
2021 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2022 freesptr = FALSE;
2023 break;
2024 }
2025 }
2026 /* Fall through */
2027
2028 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2029 look for yes/not/true/false. Some booleans are stored in a single bit in
2030 a single int. There's a special fudge for verify settings; without a suffix
2031 they set both xx_sender and xx_recipient. The table points to the sender
2032 value; search subsequently for the recipient. There's another special case:
2033 opt_bool_set also notes when a boolean has been set. */
2034
2035 case opt_bool:
2036 case opt_bit:
2037 case opt_bool_verify:
2038 case opt_bool_set:
2039 if (*s != 0)
2040 {
2041 s = readconf_readname(name2, 64, s);
2042 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2043 boolvalue = TRUE;
2044 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2045 boolvalue = FALSE;
2046 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2047 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2048 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2049 US"for boolean option ", name);
2050 }
2051
2052 /* Handle single-bit type. */
2053
2054 if (type == opt_bit)
2055 {
2056 int bit = 1 << ((ol->type >> 16) & 31);
2057 int *ptr = (data_block == NULL)?
2058 (int *)(ol->value) :
2059 (int *)(US data_block + (long int)ol->value);
2060 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2061 break;
2062 }
2063
2064 /* Handle full BOOL types */
2065
2066 if (data_block == NULL)
2067 *((BOOL *)(ol->value)) = boolvalue;
2068 else
2069 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2070
2071 /* Verify fudge */
2072
2073 if (type == opt_bool_verify)
2074 {
2075 sprintf(CS name2, "%.50s_recipient", name + offset);
2076 ol2 = find_option(name2, oltop, last);
2077 if (ol2 != NULL)
2078 {
2079 if (data_block == NULL)
2080 *((BOOL *)(ol2->value)) = boolvalue;
2081 else
2082 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2083 }
2084 }
2085
2086 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2087
2088 else if (type == opt_bool_set)
2089 {
2090 sprintf(CS name2, "*set_%.50s", name + offset);
2091 ol2 = find_option(name2, oltop, last);
2092 if (ol2 != NULL)
2093 {
2094 if (data_block == NULL)
2095 *((BOOL *)(ol2->value)) = TRUE;
2096 else
2097 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2098 }
2099 }
2100 break;
2101
2102 /* Octal integer */
2103
2104 case opt_octint:
2105 intbase = 8;
2106 inttype = US"octal ";
2107
2108 /* Integer: a simple(ish) case; allow octal and hex formats, and
2109 suffixes K, M and G. The different types affect output, not input. */
2110
2111 case opt_mkint:
2112 case opt_int:
2113 {
2114 uschar *endptr;
2115 long int lvalue;
2116
2117 errno = 0;
2118 lvalue = strtol(CS s, CSS &endptr, intbase);
2119
2120 if (endptr == s)
2121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2122 inttype, name);
2123
2124 if (errno != ERANGE)
2125 if (tolower(*endptr) == 'k')
2126 {
2127 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2128 else lvalue *= 1024;
2129 endptr++;
2130 }
2131 else if (tolower(*endptr) == 'm')
2132 {
2133 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2134 errno = ERANGE;
2135 else lvalue *= 1024*1024;
2136 endptr++;
2137 }
2138 else if (tolower(*endptr) == 'g')
2139 {
2140 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2141 errno = ERANGE;
2142 else lvalue *= 1024*1024*1024;
2143 endptr++;
2144 }
2145
2146 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2147 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2148 "absolute value of integer \"%s\" is too large (overflow)", s);
2149
2150 while (isspace(*endptr)) endptr++;
2151 if (*endptr != 0)
2152 extra_chars_error(endptr, inttype, US"integer value for ", name);
2153
2154 value = (int)lvalue;
2155 }
2156
2157 if (data_block == NULL)
2158 *((int *)(ol->value)) = value;
2159 else
2160 *((int *)(US data_block + (long int)(ol->value))) = value;
2161 break;
2162
2163 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2164 and G. */
2165 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2166
2167 case opt_Kint:
2168 {
2169 uschar *endptr;
2170 errno = 0;
2171 value = strtol(CS s, CSS &endptr, intbase);
2172
2173 if (endptr == s)
2174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2175 inttype, name);
2176
2177 if (errno != ERANGE)
2178 if (tolower(*endptr) == 'g')
2179 {
2180 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2181 errno = ERANGE;
2182 else
2183 value *= 1024*1024;
2184 endptr++;
2185 }
2186 else if (tolower(*endptr) == 'm')
2187 {
2188 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2189 errno = ERANGE;
2190 else
2191 value *= 1024;
2192 endptr++;
2193 }
2194 else if (tolower(*endptr) == 'k')
2195 endptr++;
2196 else
2197 value = (value + 512)/1024;
2198
2199 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2200 "absolute value of integer \"%s\" is too large (overflow)", s);
2201
2202 while (isspace(*endptr)) endptr++;
2203 if (*endptr != 0)
2204 extra_chars_error(endptr, inttype, US"integer value for ", name);
2205 }
2206
2207 if (data_block == NULL)
2208 *((int *)(ol->value)) = value;
2209 else
2210 *((int *)(US data_block + (long int)(ol->value))) = value;
2211 break;
2212
2213 /* Fixed-point number: held to 3 decimal places. */
2214
2215 case opt_fixed:
2216 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2217 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2218 "fixed-point number expected for %s", name);
2219
2220 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2221 "integer \"%s\" is too large (overflow)", s);
2222
2223 value *= 1000;
2224
2225 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2226 "integer \"%s\" is too large (overflow)", s);
2227
2228 /* We get a coverity error here for using count, as it derived
2229 from the tainted buffer pointed to by s, as parsed by sscanf().
2230 By the definition of sscanf we must be accessing between start
2231 and end of s (assuming it is nul-terminated...) so ignore the error. */
2232 /* coverity[tainted_data] */
2233 if (s[count] == '.')
2234 {
2235 int d = 100;
2236 while (isdigit(s[++count]))
2237 {
2238 value += (s[count] - '0') * d;
2239 d /= 10;
2240 }
2241 }
2242
2243 while (isspace(s[count])) count++;
2244
2245 if (s[count] != 0)
2246 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2247
2248 if (data_block == NULL)
2249 *((int *)(ol->value)) = value;
2250 else
2251 *((int *)(US data_block + (long int)(ol->value))) = value;
2252 break;
2253
2254 /* There's a special routine to read time values. */
2255
2256 case opt_time:
2257 value = readconf_readtime(s, 0, FALSE);
2258 if (value < 0)
2259 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2260 name);
2261 if (data_block == NULL)
2262 *((int *)(ol->value)) = value;
2263 else
2264 *((int *)(US data_block + (long int)(ol->value))) = value;
2265 break;
2266
2267 /* A time list is a list of colon-separated times, with the first
2268 element holding the size of the list and the second the number of
2269 entries used. */
2270
2271 case opt_timelist:
2272 {
2273 int count = 0;
2274 int *list = (data_block == NULL)?
2275 (int *)(ol->value) :
2276 (int *)(US data_block + (long int)(ol->value));
2277
2278 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2279 {
2280 int terminator = 0;
2281 uschar *snext = Ustrchr(s, ':');
2282 if (snext != NULL)
2283 {
2284 uschar *ss = snext;
2285 while (ss > s && isspace(ss[-1])) ss--;
2286 terminator = *ss;
2287 }
2288 value = readconf_readtime(s, terminator, FALSE);
2289 if (value < 0)
2290 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2291 name);
2292 if (count > 1 && value <= list[count])
2293 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2294 "time value out of order for %s", name);
2295 list[count+1] = value;
2296 if (snext == NULL) break;
2297 s = snext + 1;
2298 while (isspace(*s)) s++;
2299 }
2300
2301 if (count > list[0] - 2)
2302 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2303 name);
2304 if (count > 0 && list[2] == 0) count = 0;
2305 list[1] = count;
2306 break;
2307 }
2308
2309 case opt_func:
2310 {
2311 void (*fn)() = ol->value;
2312 fn(name, s);
2313 break;
2314 }
2315 }
2316
2317 return TRUE;
2318 }
2319
2320
2321
2322 /*************************************************
2323 * Print a time value *
2324 *************************************************/
2325
2326 /*
2327 Argument: a time value in seconds
2328 Returns: pointer to a fixed buffer containing the time as a string,
2329 in readconf_readtime() format
2330 */
2331
2332 uschar *
2333 readconf_printtime(int t)
2334 {
2335 int s, m, h, d, w;
2336 uschar *p = time_buffer;
2337
2338 if (t < 0)
2339 {
2340 *p++ = '-';
2341 t = -t;
2342 }
2343
2344 s = t % 60;
2345 t /= 60;
2346 m = t % 60;
2347 t /= 60;
2348 h = t % 24;
2349 t /= 24;
2350 d = t % 7;
2351 w = t/7;
2352
2353 if (w > 0) p += sprintf(CS p, "%dw", w);
2354 if (d > 0) p += sprintf(CS p, "%dd", d);
2355 if (h > 0) p += sprintf(CS p, "%dh", h);
2356 if (m > 0) p += sprintf(CS p, "%dm", m);
2357 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2358
2359 return time_buffer;
2360 }
2361
2362
2363
2364 /*************************************************
2365 * Print an individual option value *
2366 *************************************************/
2367
2368 /* This is used by the -bP option, so prints to the standard output.
2369 The entire options list is passed in as an argument, because some options come
2370 in pairs - typically uid/gid settings, which can either be explicit numerical
2371 values, or strings to be expanded later. If the numerical value is unset,
2372 search for "*expand_<name>" to see if there is a string equivalent.
2373
2374 Arguments:
2375 ol option entry, or NULL for an unknown option
2376 name option name
2377 options_block NULL for main configuration options; otherwise points to
2378 a driver block; if the option doesn't have opt_public
2379 set, then options_block->options_block is where the item
2380 resides.
2381 oltop points to the option list in which ol exists
2382 last one more than the offset of the last entry in optop
2383 no_labels do not show "foo = " at the start.
2384
2385 Returns: boolean success
2386 */
2387
2388 static BOOL
2389 print_ol(optionlist *ol, uschar *name, void *options_block,
2390 optionlist *oltop, int last, BOOL no_labels)
2391 {
2392 struct passwd *pw;
2393 struct group *gr;
2394 optionlist *ol2;
2395 void *value;
2396 uid_t *uidlist;
2397 gid_t *gidlist;
2398 uschar *s;
2399 uschar name2[64];
2400
2401 if (!ol)
2402 {
2403 printf("%s is not a known option\n", name);
2404 return FALSE;
2405 }
2406
2407 /* Non-admin callers cannot see options that have been flagged secure by the
2408 "hide" prefix. */
2409
2410 if (!admin_user && ol->type & opt_secure)
2411 {
2412 if (no_labels)
2413 printf("%s\n", hidden);
2414 else
2415 printf("%s = %s\n", name, hidden);
2416 return TRUE;
2417 }
2418
2419 /* Else show the value of the option */
2420
2421 value = ol->value;
2422 if (options_block)
2423 {
2424 if (!(ol->type & opt_public))
2425 options_block = (void *)(((driver_instance *)options_block)->options_block);
2426 value = (void *)(US options_block + (long int)value);
2427 }
2428
2429 switch(ol->type & opt_mask)
2430 {
2431 case opt_stringptr:
2432 case opt_rewrite: /* Show the text value */
2433 s = *(USS value);
2434 if (!no_labels) printf("%s = ", name);
2435 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2436 break;
2437
2438 case opt_int:
2439 if (!no_labels) printf("%s = ", name);
2440 printf("%d\n", *((int *)value));
2441 break;
2442
2443 case opt_mkint:
2444 {
2445 int x = *((int *)value);
2446 if (x != 0 && (x & 1023) == 0)
2447 {
2448 int c = 'K';
2449 x >>= 10;
2450 if ((x & 1023) == 0)
2451 {
2452 c = 'M';
2453 x >>= 10;
2454 }
2455 if (!no_labels) printf("%s = ", name);
2456 printf("%d%c\n", x, c);
2457 }
2458 else
2459 {
2460 if (!no_labels) printf("%s = ", name);
2461 printf("%d\n", x);
2462 }
2463 }
2464 break;
2465
2466 case opt_Kint:
2467 {
2468 int x = *((int *)value);
2469 if (!no_labels) printf("%s = ", name);
2470 if (x == 0) printf("0\n");
2471 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2472 else printf("%dK\n", x);
2473 }
2474 break;
2475
2476 case opt_octint:
2477 if (!no_labels) printf("%s = ", name);
2478 printf("%#o\n", *((int *)value));
2479 break;
2480
2481 /* Can be negative only when "unset", in which case integer */
2482
2483 case opt_fixed:
2484 {
2485 int x = *((int *)value);
2486 int f = x % 1000;
2487 int d = 100;
2488 if (x < 0) printf("%s =\n", name); else
2489 {
2490 if (!no_labels) printf("%s = ", name);
2491 printf("%d.", x/1000);
2492 do
2493 {
2494 printf("%d", f/d);
2495 f %= d;
2496 d /= 10;
2497 }
2498 while (f != 0);
2499 printf("\n");
2500 }
2501 }
2502 break;
2503
2504 /* If the numerical value is unset, try for the string value */
2505
2506 case opt_expand_uid:
2507 if (! *get_set_flag(name, oltop, last, options_block))
2508 {
2509 sprintf(CS name2, "*expand_%.50s", name);
2510 if ((ol2 = find_option(name2, oltop, last)))
2511 {
2512 void *value2 = ol2->value;
2513 if (options_block)
2514 value2 = (void *)(US options_block + (long int)value2);
2515 s = *(USS value2);
2516 if (!no_labels) printf("%s = ", name);
2517 printf("%s\n", s ? string_printing(s) : US"");
2518 break;
2519 }
2520 }
2521
2522 /* Else fall through */
2523
2524 case opt_uid:
2525 if (!no_labels) printf("%s = ", name);
2526 if (! *get_set_flag(name, oltop, last, options_block))
2527 printf("\n");
2528 else
2529 if ((pw = getpwuid(*((uid_t *)value))))
2530 printf("%s\n", pw->pw_name);
2531 else
2532 printf("%ld\n", (long int)(*((uid_t *)value)));
2533 break;
2534
2535 /* If the numerical value is unset, try for the string value */
2536
2537 case opt_expand_gid:
2538 if (! *get_set_flag(name, oltop, last, options_block))
2539 {
2540 sprintf(CS name2, "*expand_%.50s", name);
2541 if ( (ol2 = find_option(name2, oltop, last))
2542 && (ol2->type & opt_mask) == opt_stringptr)
2543 {
2544 void *value2 = ol2->value;
2545 if (options_block)
2546 value2 = (void *)(US options_block + (long int)value2);
2547 s = *(USS value2);
2548 if (!no_labels) printf("%s = ", name);
2549 printf("%s\n", s ? string_printing(s) : US"");
2550 break;
2551 }
2552 }
2553
2554 /* Else fall through */
2555
2556 case opt_gid:
2557 if (!no_labels) printf("%s = ", name);
2558 if (! *get_set_flag(name, oltop, last, options_block))
2559 printf("\n");
2560 else
2561 if ((gr = getgrgid(*((int *)value))))
2562 printf("%s\n", gr->gr_name);
2563 else
2564 printf("%ld\n", (long int)(*((int *)value)));
2565 break;
2566
2567 case opt_uidlist:
2568 uidlist = *((uid_t **)value);
2569 if (!no_labels) printf("%s =", name);
2570 if (uidlist)
2571 {
2572 int i;
2573 uschar sep = no_labels ? '\0' : ' ';
2574 for (i = 1; i <= (int)(uidlist[0]); i++)
2575 {
2576 uschar *name = NULL;
2577 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2578 if (sep != '\0') printf("%c", sep);
2579 if (name) printf("%s", name);
2580 else printf("%ld", (long int)(uidlist[i]));
2581 sep = ':';
2582 }
2583 }
2584 printf("\n");
2585 break;
2586
2587 case opt_gidlist:
2588 gidlist = *((gid_t **)value);
2589 if (!no_labels) printf("%s =", name);
2590 if (gidlist)
2591 {
2592 int i;
2593 uschar sep = no_labels ? '\0' : ' ';
2594 for (i = 1; i <= (int)(gidlist[0]); i++)
2595 {
2596 uschar *name = NULL;
2597 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2598 if (sep != '\0') printf("%c", sep);
2599 if (name) printf("%s", name);
2600 else printf("%ld", (long int)(gidlist[i]));
2601 sep = ':';
2602 }
2603 }
2604 printf("\n");
2605 break;
2606
2607 case opt_time:
2608 if (!no_labels) printf("%s = ", name);
2609 printf("%s\n", readconf_printtime(*((int *)value)));
2610 break;
2611
2612 case opt_timelist:
2613 {
2614 int i;
2615 int *list = (int *)value;
2616 if (!no_labels) printf("%s = ", name);
2617 for (i = 0; i < list[1]; i++)
2618 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2619 printf("\n");
2620 }
2621 break;
2622
2623 case opt_bit:
2624 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2625 "" : "no_", name);
2626 break;
2627
2628 case opt_expand_bool:
2629 sprintf(CS name2, "*expand_%.50s", name);
2630 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2631 {
2632 void *value2 = ol2->value;
2633 if (options_block)
2634 value2 = (void *)(US options_block + (long int)value2);
2635 s = *(USS value2);
2636 if (s)
2637 {
2638 if (!no_labels) printf("%s = ", name);
2639 printf("%s\n", string_printing(s));
2640 break;
2641 }
2642 /* s == NULL => string not set; fall through */
2643 }
2644
2645 /* Fall through */
2646
2647 case opt_bool:
2648 case opt_bool_verify:
2649 case opt_bool_set:
2650 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2651 break;
2652 }
2653 return TRUE;
2654 }
2655
2656
2657
2658 /*************************************************
2659 * Print value from main configuration *
2660 *************************************************/
2661
2662 /* This function, called as a result of encountering the -bP option,
2663 causes the value of any main configuration variable to be output if the
2664 second argument is NULL. There are some special values:
2665
2666 all print all main configuration options
2667 config_file print the name of the configuration file
2668 (configure_file will still work, for backward
2669 compatibility)
2670 routers print the routers' configurations
2671 transports print the transports' configuration
2672 authenticators print the authenticators' configuration
2673 macros print the macros' configuration
2674 router_list print a list of router names
2675 transport_list print a list of transport names
2676 authenticator_list print a list of authentication mechanism names
2677 macro_list print a list of macro names
2678 +name print a named list item
2679 local_scan print the local_scan options
2680 config print the configuration as it is parsed
2681 environment print the used execution environment
2682
2683 If the second argument is not NULL, it must be one of "router", "transport",
2684 "authenticator" or "macro" in which case the first argument identifies the
2685 driver whose options are to be printed.
2686
2687 Arguments:
2688 name option name if type == NULL; else driver name
2689 type NULL or driver type name, as described above
2690 no_labels avoid the "foo = " at the start of an item
2691
2692 Returns: Boolean success
2693 */
2694
2695 BOOL
2696 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2697 {
2698 BOOL names_only = FALSE;
2699 optionlist *ol;
2700 optionlist *ol2 = NULL;
2701 driver_instance *d = NULL;
2702 macro_item *m;
2703 int size = 0;
2704
2705 if (!type)
2706 {
2707 if (*name == '+')
2708 {
2709 int i;
2710 tree_node *t;
2711 BOOL found = FALSE;
2712 static uschar *types[] = { US"address", US"domain", US"host",
2713 US"localpart" };
2714 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2715 &hostlist_anchor, &localpartlist_anchor };
2716
2717 for (i = 0; i < 4; i++)
2718 if ((t = tree_search(*(anchors[i]), name+1)))
2719 {
2720 found = TRUE;
2721 if (no_labels)
2722 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2723 else
2724 printf("%slist %s = %s\n", types[i], name+1,
2725 ((namedlist_block *)(t->data.ptr))->string);
2726 }
2727
2728 if (!found)
2729 printf("no address, domain, host, or local part list called \"%s\" "
2730 "exists\n", name+1);
2731
2732 return found;
2733 }
2734
2735 if ( Ustrcmp(name, "configure_file") == 0
2736 || Ustrcmp(name, "config_file") == 0)
2737 {
2738 printf("%s\n", CS config_main_filename);
2739 return TRUE;
2740 }
2741
2742 if (Ustrcmp(name, "all") == 0)
2743 {
2744 for (ol = optionlist_config;
2745 ol < optionlist_config + nelem(optionlist_config); ol++)
2746 if (!(ol->type & opt_hidden))
2747 (void) print_ol(ol, US ol->name, NULL,
2748 optionlist_config, nelem(optionlist_config),
2749 no_labels);
2750 return TRUE;
2751 }
2752
2753 if (Ustrcmp(name, "local_scan") == 0)
2754 {
2755 #ifndef LOCAL_SCAN_HAS_OPTIONS
2756 printf("local_scan() options are not supported\n");
2757 return FALSE;
2758 #else
2759 for (ol = local_scan_options;
2760 ol < local_scan_options + local_scan_options_count; ol++)
2761 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2762 local_scan_options_count, no_labels);
2763 return TRUE;
2764 #endif
2765 }
2766
2767 if (Ustrcmp(name, "config") == 0)
2768 {
2769 print_config(admin_user, no_labels);
2770 return TRUE;
2771 }
2772
2773 if (Ustrcmp(name, "routers") == 0)
2774 {
2775 type = US"router";
2776 name = NULL;
2777 }
2778 else if (Ustrcmp(name, "transports") == 0)
2779 {
2780 type = US"transport";
2781 name = NULL;
2782 }
2783 else if (Ustrcmp(name, "authenticators") == 0)
2784 {
2785 type = US"authenticator";
2786 name = NULL;
2787 }
2788 else if (Ustrcmp(name, "macros") == 0)
2789 {
2790 type = US"macro";
2791 name = NULL;
2792 }
2793 else if (Ustrcmp(name, "router_list") == 0)
2794 {
2795 type = US"router";
2796 name = NULL;
2797 names_only = TRUE;
2798 }
2799 else if (Ustrcmp(name, "transport_list") == 0)
2800 {
2801 type = US"transport";
2802 name = NULL;
2803 names_only = TRUE;
2804 }
2805 else if (Ustrcmp(name, "authenticator_list") == 0)
2806 {
2807 type = US"authenticator";
2808 name = NULL;
2809 names_only = TRUE;
2810 }
2811 else if (Ustrcmp(name, "macro_list") == 0)
2812 {
2813 type = US"macro";
2814 name = NULL;
2815 names_only = TRUE;
2816 }
2817 else if (Ustrcmp(name, "environment") == 0)
2818 {
2819 if (environ)
2820 {
2821 uschar ** p;
2822 for (p = USS environ; *p; p++) ;
2823 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2824
2825 for (p = USS environ; *p; p++)
2826 {
2827 uschar * q;
2828 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2829 puts(CS *p);
2830 }
2831 }
2832 return TRUE;
2833 }
2834
2835 else
2836 return print_ol(find_option(name,
2837 optionlist_config, nelem(optionlist_config)),
2838 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2839 }
2840
2841 /* Handle the options for a router or transport. Skip options that are flagged
2842 as hidden. Some of these are options with names starting with '*', used for
2843 internal alternative representations of other options (which the printing
2844 function will sort out). Others are synonyms kept for backward compatibility.
2845 */
2846
2847 if (Ustrcmp(type, "router") == 0)
2848 {
2849 d = (driver_instance *)routers;
2850 ol2 = optionlist_routers;
2851 size = optionlist_routers_size;
2852 }
2853 else if (Ustrcmp(type, "transport") == 0)
2854 {
2855 d = (driver_instance *)transports;
2856 ol2 = optionlist_transports;
2857 size = optionlist_transports_size;
2858 }
2859 else if (Ustrcmp(type, "authenticator") == 0)
2860 {
2861 d = (driver_instance *)auths;
2862 ol2 = optionlist_auths;
2863 size = optionlist_auths_size;
2864 }
2865
2866 else if (Ustrcmp(type, "macro") == 0)
2867 {
2868 /* People store passwords in macros and they were previously not available
2869 for printing. So we have an admin_users restriction. */
2870 if (!admin_user)
2871 {
2872 fprintf(stderr, "exim: permission denied\n");
2873 return FALSE;
2874 }
2875 for (m = macros; m; m = m->next)
2876 if (!name || Ustrcmp(name, m->name) == 0)
2877 {
2878 if (names_only)
2879 printf("%s\n", CS m->name);
2880 else
2881 printf("%s=%s\n", CS m->name, CS m->replacement);
2882 if (name)
2883 return TRUE;
2884 }
2885 if (!name) return TRUE;
2886
2887 printf("%s %s not found\n", type, name);
2888 return FALSE;
2889 }
2890
2891 if (names_only)
2892 {
2893 for (; d; d = d->next) printf("%s\n", CS d->name);
2894 return TRUE;
2895 }
2896
2897 /* Either search for a given driver, or print all of them */
2898
2899 for (; d; d = d->next)
2900 {
2901 BOOL rc = FALSE;
2902 if (!name)
2903 printf("\n%s %s:\n", d->name, type);
2904 else if (Ustrcmp(d->name, name) != 0) continue;
2905
2906 for (ol = ol2; ol < ol2 + size; ol++)
2907 if (!(ol->type & opt_hidden))
2908 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2909
2910 for (ol = d->info->options;
2911 ol < d->info->options + *(d->info->options_count); ol++)
2912 if (!(ol->type & opt_hidden))
2913 rc |= print_ol(ol, US ol->name, d, d->info->options,
2914 *d->info->options_count, no_labels);
2915
2916 if (name) return rc;
2917 }
2918 if (!name) return TRUE;
2919
2920 printf("%s %s not found\n", type, name);
2921 return FALSE;
2922 }
2923
2924
2925
2926 /*************************************************
2927 * Read a named list item *
2928 *************************************************/
2929
2930 /* This function reads a name and a list (i.e. string). The name is used to
2931 save the list in a tree, sorted by its name. Each entry also has a number,
2932 which can be used for caching tests, but if the string contains any expansion
2933 items other than $key, the number is set negative to inhibit caching. This
2934 mechanism is used for domain, host, and address lists that are referenced by
2935 the "+name" syntax.
2936
2937 Arguments:
2938 anchorp points to the tree anchor
2939 numberp points to the current number for this tree
2940 max the maximum number permitted
2941 s the text of the option line, starting immediately after the name
2942 of the list type
2943 tname the name of the list type, for messages
2944
2945 Returns: nothing
2946 */
2947
2948 static void
2949 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2950 uschar *tname)
2951 {
2952 BOOL forcecache = FALSE;
2953 uschar *ss;
2954 tree_node *t;
2955 namedlist_block *nb = store_get(sizeof(namedlist_block));
2956
2957 if (Ustrncmp(s, "_cache", 6) == 0)
2958 {
2959 forcecache = TRUE;
2960 s += 6;
2961 }
2962
2963 if (!isspace(*s))
2964 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2965
2966 if (*numberp >= max)
2967 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2968 tname, max);
2969
2970 while (isspace(*s)) s++;
2971 ss = s;
2972 while (isalnum(*s) || *s == '_') s++;
2973 t = store_get(sizeof(tree_node) + s-ss);
2974 Ustrncpy(t->name, ss, s-ss);
2975 t->name[s-ss] = 0;
2976 while (isspace(*s)) s++;
2977
2978 if (!tree_insertnode(anchorp, t))
2979 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2980 "duplicate name \"%s\" for a named %s", t->name, tname);
2981
2982 t->data.ptr = nb;
2983 nb->number = *numberp;
2984 *numberp += 1;
2985
2986 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2987 "missing '=' after \"%s\"", t->name);
2988 while (isspace(*s)) s++;
2989 nb->string = read_string(s, t->name);
2990 nb->cache_data = NULL;
2991
2992 /* Check the string for any expansions; if any are found, mark this list
2993 uncacheable unless the user has explicited forced caching. */
2994
2995 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2996 }
2997
2998
2999
3000
3001 /*************************************************
3002 * Unpick data for a rate limit *
3003 *************************************************/
3004
3005 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3006 separate values.
3007
3008 Arguments:
3009 s string, in the form t,b,f,l
3010 where t is the threshold (integer)
3011 b is the initial delay (time)
3012 f is the multiplicative factor (fixed point)
3013 k is the maximum time (time)
3014 threshold where to store threshold
3015 base where to store base in milliseconds
3016 factor where to store factor in milliseconds
3017 limit where to store limit
3018
3019 Returns: nothing (panics on error)
3020 */
3021
3022 static void
3023 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3024 int *limit)
3025 {
3026 uschar bstring[16], lstring[16];
3027
3028 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3029 factor, lstring) == 4)
3030 {
3031 *base = readconf_readtime(bstring, 0, TRUE);
3032 *limit = readconf_readtime(lstring, 0, TRUE);
3033 if (*base >= 0 && *limit >= 0) return;
3034 }
3035 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3036 }
3037
3038
3039
3040
3041 /*************************************************
3042 * Drop privs for checking TLS config *
3043 *************************************************/
3044
3045 /* We want to validate TLS options during readconf, but do not want to be
3046 root when we call into the TLS library, in case of library linkage errors
3047 which cause segfaults; before this check, those were always done as the Exim
3048 runtime user and it makes sense to continue with that.
3049
3050 Assumes: tls_require_ciphers has been set, if it will be
3051 exim_user has been set, if it will be
3052 exim_group has been set, if it will be
3053
3054 Returns: bool for "okay"; false will cause caller to immediately exit.
3055 */
3056
3057 #ifdef SUPPORT_TLS
3058 static BOOL
3059 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3060 {
3061 const uschar *errmsg;
3062 pid_t pid;
3063 int rc, status;
3064 void (*oldsignal)(int);
3065
3066 /* If TLS will never be used, no point checking ciphers */
3067
3068 if ( !tls_advertise_hosts
3069 || !*tls_advertise_hosts
3070 || Ustrcmp(tls_advertise_hosts, ":") == 0
3071 )
3072 return TRUE;
3073 else if (!nowarn && !tls_certificate)
3074 log_write(0, LOG_MAIN,
3075 "Warning: No server certificate defined; will use a selfsigned one.\n"
3076 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3077
3078 oldsignal = signal(SIGCHLD, SIG_DFL);
3079
3080 fflush(NULL);
3081 if ((pid = fork()) < 0)
3082 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3083
3084 if (pid == 0)
3085 {
3086 /* in some modes, will have dropped privilege already */
3087 if (!geteuid())
3088 exim_setugid(exim_uid, exim_gid, FALSE,
3089 US"calling tls_validate_require_cipher");
3090
3091 if ((errmsg = tls_validate_require_cipher()))
3092 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3093 "tls_require_ciphers invalid: %s", errmsg);
3094 fflush(NULL);
3095 _exit(0);
3096 }
3097
3098 do {
3099 rc = waitpid(pid, &status, 0);
3100 } while (rc < 0 && errno == EINTR);
3101
3102 DEBUG(D_tls)
3103 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3104 (int)pid, status);
3105
3106 signal(SIGCHLD, oldsignal);
3107
3108 return status == 0;
3109 }
3110 #endif /* SUPPORT_TLS */
3111
3112
3113
3114
3115 /*************************************************
3116 * Read main configuration options *
3117 *************************************************/
3118
3119 /* This function is the first to be called for configuration reading. It
3120 opens the configuration file and reads general configuration settings until
3121 it reaches the end of the configuration section. The file is then left open so
3122 that the remaining configuration data can subsequently be read if needed for
3123 this run of Exim.
3124
3125 The configuration file must be owned either by root or exim, and be writeable
3126 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3127 in the config file, so the test is done on the compiled in values. A slight
3128 anomaly, to be carefully documented.
3129
3130 The name of the configuration file is taken from a list that is included in the
3131 binary of Exim. It can be altered from the command line, but if that is done,
3132 root privilege is immediately withdrawn unless the caller is root or exim.
3133 The first file on the list that exists is used.
3134
3135 For use on multiple systems that share file systems, first look for a
3136 configuration file whose name has the current node name on the end. If that is
3137 not found, try the generic name. For really contorted configurations, that run
3138 multiple Exims with different uid settings, first try adding the effective uid
3139 before the node name. These complications are going to waste resources on most
3140 systems. Therefore they are available only when requested by compile-time
3141 options. */
3142
3143 void
3144 readconf_main(BOOL nowarn)
3145 {
3146 int sep = 0;
3147 struct stat statbuf;
3148 uschar *s, *filename;
3149 const uschar *list = config_main_filelist;
3150
3151 /* Loop through the possible file names */
3152
3153 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3154 {
3155
3156 /* Cut out all the fancy processing unless specifically wanted */
3157
3158 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3159 uschar *suffix = filename + Ustrlen(filename);
3160
3161 /* Try for the node-specific file if a node name exists */
3162
3163 #ifdef CONFIGURE_FILE_USE_NODE
3164 struct utsname uts;
3165 if (uname(&uts) >= 0)
3166 {
3167 #ifdef CONFIGURE_FILE_USE_EUID
3168 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3169 config_file = Ufopen(filename, "rb");
3170 if (config_file == NULL)
3171 #endif /* CONFIGURE_FILE_USE_EUID */
3172 {
3173 sprintf(CS suffix, ".%.256s", uts.nodename);
3174 config_file = Ufopen(filename, "rb");
3175 }
3176 }
3177 #endif /* CONFIGURE_FILE_USE_NODE */
3178
3179 /* Otherwise, try the generic name, possibly with the euid added */
3180
3181 #ifdef CONFIGURE_FILE_USE_EUID
3182 if (config_file == NULL)
3183 {
3184 sprintf(CS suffix, ".%ld", (long int)original_euid);
3185 config_file = Ufopen(filename, "rb");
3186 }
3187 #endif /* CONFIGURE_FILE_USE_EUID */
3188
3189 /* Finally, try the unadorned name */
3190
3191 if (config_file == NULL)
3192 {
3193 *suffix = 0;
3194 config_file = Ufopen(filename, "rb");
3195 }
3196 #else /* if neither defined */
3197
3198 /* This is the common case when the fancy processing is not included. */
3199
3200 config_file = Ufopen(filename, "rb");
3201 #endif
3202
3203 /* If the file does not exist, continue to try any others. For any other
3204 error, break out (and die). */
3205
3206 if (config_file != NULL || errno != ENOENT) break;
3207 }
3208
3209 /* On success, save the name for verification; config_filename is used when
3210 logging configuration errors (it changes for .included files) whereas
3211 config_main_filename is the name shown by -bP. Failure to open a configuration
3212 file is a serious disaster. */
3213
3214 if (config_file)
3215 {
3216 uschar *last_slash = Ustrrchr(filename, '/');
3217 config_filename = config_main_filename = string_copy(filename);
3218
3219 /* The config_main_directory we need for the $config_dir expansion.
3220 config_main_filename we need for $config_file expansion.
3221 And config_dir is the directory of the current configuration, used for
3222 relative .includes. We do need to know it's name, as we change our working
3223 directory later. */
3224
3225 if (filename[0] == '/')
3226 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3227 else
3228 {
3229 /* relative configuration file name: working dir + / + basename(filename) */
3230
3231 uschar buf[PATH_MAX];
3232 gstring * g;
3233
3234 if (os_getcwd(buf, PATH_MAX) == NULL)
3235 {
3236 perror("exim: getcwd");
3237 exit(EXIT_FAILURE);
3238 }
3239 g = string_cat(NULL, buf);
3240
3241 /* If the dir does not end with a "/", append one */
3242 if (g->s[g->ptr-1] != '/')
3243 g = string_catn(g, US"/", 1);
3244
3245 /* If the config file contains a "/", extract the directory part */
3246 if (last_slash)
3247 g = string_catn(g, filename, last_slash - filename);
3248
3249 config_main_directory = string_from_gstring(g);
3250 }
3251 config_directory = config_main_directory;
3252 }
3253 else
3254 {
3255 if (filename == NULL)
3256 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3257 "%s", config_main_filelist);
3258 else
3259 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3260 "configuration file %s", filename));
3261 }
3262
3263 /* Now, once we found and opened our configuration file, we change the directory
3264 to a safe place. Later we change to $spool_directory. */
3265
3266 if (Uchdir("/") < 0)
3267 {
3268 perror("exim: chdir `/': ");
3269 exit(EXIT_FAILURE);
3270 }
3271
3272 /* Check the status of the file we have opened, if we have retained root
3273 privileges and the file isn't /dev/null (which *should* be 0666). */
3274
3275 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3276 {
3277 if (fstat(fileno(config_file), &statbuf) != 0)
3278 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",