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[hcoop/debian/exim4.git] / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
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 #define CSTATE_STACK_SIZE 10
15
16
17 /* Structure for chain (stack) of .included files */
18
19 typedef struct config_file_item {
20 struct config_file_item *next;
21 uschar *filename;
22 FILE *file;
23 int lineno;
24 } config_file_item;
25
26 /* Structure of table of conditional words and their state transitions */
27
28 typedef struct cond_item {
29 uschar *name;
30 int namelen;
31 int action1;
32 int action2;
33 int pushpop;
34 } cond_item;
35
36 /* Structure of table of syslog facility names and values */
37
38 typedef struct syslog_fac_item {
39 uschar *name;
40 int value;
41 } syslog_fac_item;
42
43
44 /* Static variables */
45
46 static config_file_item *config_file_stack = NULL; /* For includes */
47
48 static uschar *syslog_facility_str = NULL;
49 static uschar next_section[24];
50 static uschar time_buffer[24];
51
52 /* State variables for conditional loading (.ifdef / .else / .endif) */
53
54 static int cstate = 0;
55 static int cstate_stack_ptr = -1;
56 static int cstate_stack[CSTATE_STACK_SIZE];
57
58 /* Table of state transitions for handling conditional inclusions. There are
59 four possible state transitions:
60
61 .ifdef true
62 .ifdef false
63 .elifdef true (or .else)
64 .elifdef false
65
66 .endif just causes the previous cstate to be popped off the stack */
67
68 static int next_cstate[3][4] =
69 {
70 /* State 0: reading from file, or reading until next .else or .endif */
71 { 0, 1, 2, 2 },
72 /* State 1: condition failed, skipping until next .else or .endif */
73 { 2, 2, 0, 1 },
74 /* State 2: skipping until .endif */
75 { 2, 2, 2, 2 },
76 };
77
78 /* Table of conditionals and the states to set. For each name, there are four
79 values: the length of the name (to save computing it each time), the state to
80 set if a macro was found in the line, the state to set if a macro was not found
81 in the line, and a stack manipulation setting which is:
82
83 -1 pull state value off the stack
84 0 don't alter the stack
85 +1 push value onto stack, before setting new state
86 */
87
88 static cond_item cond_list[] = {
89 { US"ifdef", 5, 0, 1, 1 },
90 { US"ifndef", 6, 1, 0, 1 },
91 { US"elifdef", 7, 2, 3, 0 },
92 { US"elifndef", 8, 3, 2, 0 },
93 { US"else", 4, 2, 2, 0 },
94 { US"endif", 5, 0, 0, -1 }
95 };
96
97 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
98
99 /* Table of syslog facility names and their values */
100
101 static syslog_fac_item syslog_list[] = {
102 { US"mail", LOG_MAIL },
103 { US"user", LOG_USER },
104 { US"news", LOG_NEWS },
105 { US"uucp", LOG_UUCP },
106 { US"local0", LOG_LOCAL0 },
107 { US"local1", LOG_LOCAL1 },
108 { US"local2", LOG_LOCAL2 },
109 { US"local3", LOG_LOCAL3 },
110 { US"local4", LOG_LOCAL4 },
111 { US"local5", LOG_LOCAL5 },
112 { US"local6", LOG_LOCAL6 },
113 { US"local7", LOG_LOCAL7 },
114 { US"daemon", LOG_DAEMON }
115 };
116
117 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
118
119
120
121
122 /*************************************************
123 * Main configuration options *
124 *************************************************/
125
126 /* The list of options that can be set in the main configuration file. This
127 must be in alphabetic order because it is searched by binary chop. */
128
129 static optionlist optionlist_config[] = {
130 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
131 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
132 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
133 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
134 { "accept_8bitmime", opt_bool, &accept_8bitmime },
135 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
136 #ifdef WITH_CONTENT_SCAN
137 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
138 #endif
139 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
140 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
141 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
142 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
143 #ifndef DISABLE_PRDR
144 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
145 #endif
146 #ifndef DISABLE_DKIM
147 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
148 #endif
149 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
150 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
151 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
152 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
153 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
154 #ifdef WITH_CONTENT_SCAN
155 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
156 #endif
157 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
158 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
159 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
160 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
161 #ifdef SUPPORT_TLS
162 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
163 #endif
164 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
165 { "admin_groups", opt_gidlist, &admin_groups },
166 { "allow_domain_literals", opt_bool, &allow_domain_literals },
167 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
168 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
169 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
170 { "auto_thaw", opt_time, &auto_thaw },
171 #ifdef WITH_CONTENT_SCAN
172 { "av_scanner", opt_stringptr, &av_scanner },
173 #endif
174 { "bi_command", opt_stringptr, &bi_command },
175 #ifdef EXPERIMENTAL_BRIGHTMAIL
176 { "bmi_config_file", opt_stringptr, &bmi_config_file },
177 #endif
178 { "bounce_message_file", opt_stringptr, &bounce_message_file },
179 { "bounce_message_text", opt_stringptr, &bounce_message_text },
180 { "bounce_return_body", opt_bool, &bounce_return_body },
181 { "bounce_return_message", opt_bool, &bounce_return_message },
182 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
183 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
184 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
185 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
186 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
187 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
188 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
189 { "check_log_inodes", opt_int, &check_log_inodes },
190 { "check_log_space", opt_Kint, &check_log_space },
191 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
192 { "check_spool_inodes", opt_int, &check_spool_inodes },
193 { "check_spool_space", opt_Kint, &check_spool_space },
194 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
195 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
196 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
197 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
198 #ifdef EXPERIMENTAL_DCC
199 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
200 { "dccifd_address", opt_stringptr, &dccifd_address },
201 { "dccifd_options", opt_stringptr, &dccifd_options },
202 #endif
203 { "delay_warning", opt_timelist, &delay_warning },
204 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
205 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
206 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
207 { "delivery_date_remove", opt_bool, &delivery_date_remove },
208 #ifdef ENABLE_DISABLE_FSYNC
209 { "disable_fsync", opt_bool, &disable_fsync },
210 #endif
211 { "disable_ipv6", opt_bool, &disable_ipv6 },
212 #ifndef DISABLE_DKIM
213 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
214 #endif
215 #ifdef EXPERIMENTAL_DMARC
216 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
217 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
218 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
219 #endif
220 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
221 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
222 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
223 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
224 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
225 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
226 { "dns_retrans", opt_time, &dns_retrans },
227 { "dns_retry", opt_int, &dns_retry },
228 { "dns_use_edns0", opt_int, &dns_use_edns0 },
229 /* This option is now a no-op, retained for compability */
230 { "drop_cr", opt_bool, &drop_cr },
231 /*********************************************************/
232 #ifdef EXPERIMENTAL_DSN
233 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
234 #endif
235 { "dsn_from", opt_stringptr, &dsn_from },
236 { "envelope_to_remove", opt_bool, &envelope_to_remove },
237 { "errors_copy", opt_stringptr, &errors_copy },
238 { "errors_reply_to", opt_stringptr, &errors_reply_to },
239 { "exim_group", opt_gid, &exim_gid },
240 { "exim_path", opt_stringptr, &exim_path },
241 { "exim_user", opt_uid, &exim_uid },
242 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
243 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
244 { "finduser_retries", opt_int, &finduser_retries },
245 { "freeze_tell", opt_stringptr, &freeze_tell },
246 { "gecos_name", opt_stringptr, &gecos_name },
247 { "gecos_pattern", opt_stringptr, &gecos_pattern },
248 #ifdef SUPPORT_TLS
249 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
250 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
251 /* These three gnutls_require_* options stopped working in Exim 4.80 */
252 /* From 4.83 we log a warning; a future relase will remove them */
253 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
254 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
255 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
256 #endif
257 { "header_line_maxsize", opt_int, &header_line_maxsize },
258 { "header_maxsize", opt_int, &header_maxsize },
259 { "headers_charset", opt_stringptr, &headers_charset },
260 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
261 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
262 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
263 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
264 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
265 { "hold_domains", opt_stringptr, &hold_domains },
266 { "host_lookup", opt_stringptr, &host_lookup },
267 { "host_lookup_order", opt_stringptr, &host_lookup_order },
268 { "host_reject_connection", opt_stringptr, &host_reject_connection },
269 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
270 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
271 #ifdef LOOKUP_IBASE
272 { "ibase_servers", opt_stringptr, &ibase_servers },
273 #endif
274 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
275 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
276 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
277 { "keep_malformed", opt_time, &keep_malformed },
278 #ifdef LOOKUP_LDAP
279 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
280 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
281 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
282 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
283 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
284 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
285 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
286 { "ldap_start_tls", opt_bool, &eldap_start_tls },
287 { "ldap_version", opt_int, &eldap_version },
288 #endif
289 { "local_from_check", opt_bool, &local_from_check },
290 { "local_from_prefix", opt_stringptr, &local_from_prefix },
291 { "local_from_suffix", opt_stringptr, &local_from_suffix },
292 { "local_interfaces", opt_stringptr, &local_interfaces },
293 { "local_scan_timeout", opt_time, &local_scan_timeout },
294 { "local_sender_retain", opt_bool, &local_sender_retain },
295 { "localhost_number", opt_stringptr, &host_number_string },
296 { "log_file_path", opt_stringptr, &log_file_path },
297 { "log_selector", opt_stringptr, &log_selector_string },
298 { "log_timezone", opt_bool, &log_timezone },
299 { "lookup_open_max", opt_int, &lookup_open_max },
300 { "max_username_length", opt_int, &max_username_length },
301 { "message_body_newlines", opt_bool, &message_body_newlines },
302 { "message_body_visible", opt_mkint, &message_body_visible },
303 { "message_id_header_domain", opt_stringptr, &message_id_domain },
304 { "message_id_header_text", opt_stringptr, &message_id_text },
305 { "message_logs", opt_bool, &message_logs },
306 { "message_size_limit", opt_stringptr, &message_size_limit },
307 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
308 { "move_frozen_messages", opt_bool, &move_frozen_messages },
309 #endif
310 { "mua_wrapper", opt_bool, &mua_wrapper },
311 #ifdef LOOKUP_MYSQL
312 { "mysql_servers", opt_stringptr, &mysql_servers },
313 #endif
314 { "never_users", opt_uidlist, &never_users },
315 #ifdef SUPPORT_TLS
316 { "openssl_options", opt_stringptr, &openssl_options },
317 #endif
318 #ifdef LOOKUP_ORACLE
319 { "oracle_servers", opt_stringptr, &oracle_servers },
320 #endif
321 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
322 #ifdef EXIM_PERL
323 { "perl_at_start", opt_bool, &opt_perl_at_start },
324 { "perl_startup", opt_stringptr, &opt_perl_startup },
325 #endif
326 #ifdef LOOKUP_PGSQL
327 { "pgsql_servers", opt_stringptr, &pgsql_servers },
328 #endif
329 { "pid_file_path", opt_stringptr, &pid_file_path },
330 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
331 #ifndef DISABLE_PRDR
332 { "prdr_enable", opt_bool, &prdr_enable },
333 #endif
334 { "preserve_message_logs", opt_bool, &preserve_message_logs },
335 { "primary_hostname", opt_stringptr, &primary_hostname },
336 { "print_topbitchars", opt_bool, &print_topbitchars },
337 { "process_log_path", opt_stringptr, &process_log_path },
338 { "prod_requires_admin", opt_bool, &prod_requires_admin },
339 #ifdef EXPERIMENTAL_PROXY
340 { "proxy_required_hosts", opt_stringptr, &proxy_required_hosts },
341 #endif
342 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
343 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
344 { "queue_domains", opt_stringptr, &queue_domains },
345 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
346 { "queue_only", opt_bool, &queue_only },
347 { "queue_only_file", opt_stringptr, &queue_only_file },
348 { "queue_only_load", opt_fixed, &queue_only_load },
349 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
350 { "queue_only_override", opt_bool, &queue_only_override },
351 { "queue_run_in_order", opt_bool, &queue_run_in_order },
352 { "queue_run_max", opt_int, &queue_run_max },
353 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
354 { "receive_timeout", opt_time, &receive_timeout },
355 { "received_header_text", opt_stringptr, &received_header_text },
356 { "received_headers_max", opt_int, &received_headers_max },
357 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
358 { "recipients_max", opt_int, &recipients_max },
359 { "recipients_max_reject", opt_bool, &recipients_max_reject },
360 #ifdef EXPERIMENTAL_REDIS
361 { "redis_servers", opt_stringptr, &redis_servers },
362 #endif
363 { "remote_max_parallel", opt_int, &remote_max_parallel },
364 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
365 { "retry_data_expire", opt_time, &retry_data_expire },
366 { "retry_interval_max", opt_time, &retry_interval_max },
367 { "return_path_remove", opt_bool, &return_path_remove },
368 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
369 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
370 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
371 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
372 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
373 { "smtp_accept_max", opt_int, &smtp_accept_max },
374 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
375 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
376 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
377 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
378 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
379 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
380 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
381 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
382 { "smtp_banner", opt_stringptr, &smtp_banner },
383 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
384 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
385 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
386 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
387 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
388 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
389 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
390 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
391 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
392 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
393 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
394 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
395 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
396 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
397 #ifdef WITH_CONTENT_SCAN
398 { "spamd_address", opt_stringptr, &spamd_address },
399 #endif
400 #ifdef EXPERIMENTAL_SPF
401 { "spf_guess", opt_stringptr, &spf_guess },
402 #endif
403 { "split_spool_directory", opt_bool, &split_spool_directory },
404 { "spool_directory", opt_stringptr, &spool_directory },
405 #ifdef LOOKUP_SQLITE
406 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
407 #endif
408 #ifdef EXPERIMENTAL_SRS
409 { "srs_config", opt_stringptr, &srs_config },
410 { "srs_hashlength", opt_int, &srs_hashlength },
411 { "srs_hashmin", opt_int, &srs_hashmin },
412 { "srs_maxage", opt_int, &srs_maxage },
413 { "srs_secrets", opt_stringptr, &srs_secrets },
414 { "srs_usehash", opt_bool, &srs_usehash },
415 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
416 #endif
417 { "strict_acl_vars", opt_bool, &strict_acl_vars },
418 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
419 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
420 { "syslog_duplication", opt_bool, &syslog_duplication },
421 { "syslog_facility", opt_stringptr, &syslog_facility_str },
422 { "syslog_processname", opt_stringptr, &syslog_processname },
423 { "syslog_timestamp", opt_bool, &syslog_timestamp },
424 { "system_filter", opt_stringptr, &system_filter },
425 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
426 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
427 { "system_filter_group", opt_gid, &system_filter_gid },
428 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
429 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
430 { "system_filter_user", opt_uid, &system_filter_uid },
431 { "tcp_nodelay", opt_bool, &tcp_nodelay },
432 #ifdef USE_TCP_WRAPPERS
433 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
434 #endif
435 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
436 { "timezone", opt_stringptr, &timezone_string },
437 #ifdef SUPPORT_TLS
438 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
439 { "tls_certificate", opt_stringptr, &tls_certificate },
440 { "tls_crl", opt_stringptr, &tls_crl },
441 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
442 { "tls_dhparam", opt_stringptr, &tls_dhparam },
443 # ifndef DISABLE_OCSP
444 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
445 # endif
446 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
447 { "tls_privatekey", opt_stringptr, &tls_privatekey },
448 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
449 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
450 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
451 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
452 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
453 #endif
454 { "trusted_groups", opt_gidlist, &trusted_groups },
455 { "trusted_users", opt_uidlist, &trusted_users },
456 { "unknown_login", opt_stringptr, &unknown_login },
457 { "unknown_username", opt_stringptr, &unknown_username },
458 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
459 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
460 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
461 { "warn_message_file", opt_stringptr, &warn_message_file },
462 { "write_rejectlog", opt_bool, &write_rejectlog }
463 };
464
465 static int optionlist_config_size =
466 sizeof(optionlist_config)/sizeof(optionlist);
467
468
469
470 /*************************************************
471 * Find the name of an option *
472 *************************************************/
473
474 /* This function is to aid debugging. Various functions take arguments that are
475 pointer variables in the options table or in option tables for various drivers.
476 For debugging output, it is useful to be able to find the name of the option
477 which is currently being processed. This function finds it, if it exists, by
478 searching the table(s).
479
480 Arguments: a value that is presumed to be in the table above
481 Returns: the option name, or an empty string
482 */
483
484 uschar *
485 readconf_find_option(void *p)
486 {
487 int i;
488 router_instance *r;
489 transport_instance *t;
490
491 for (i = 0; i < optionlist_config_size; i++)
492 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
493
494 for (r = routers; r != NULL; r = r->next)
495 {
496 router_info *ri = r->info;
497 for (i = 0; i < ri->options_count[0]; i++)
498 {
499 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
500 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
501 return US ri->options[i].name;
502 }
503 }
504
505 for (t = transports; t != NULL; t = t->next)
506 {
507 transport_info *ti = t->info;
508 for (i = 0; i < ti->options_count[0]; i++)
509 {
510 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
511 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
512 return US ti->options[i].name;
513 }
514 }
515
516 return US"";
517 }
518
519
520
521
522 /*************************************************
523 * Deal with an assignment to a macro *
524 *************************************************/
525
526 /* This function is called when a line that starts with an upper case letter is
527 encountered. The argument "line" should contain a complete logical line, and
528 start with the first letter of the macro name. The macro name and the
529 replacement text are extracted and stored. Redefinition of existing,
530 non-command line, macros is permitted using '==' instead of '='.
531
532 Arguments:
533 s points to the start of the logical line
534
535 Returns: nothing
536 */
537
538 static void
539 read_macro_assignment(uschar *s)
540 {
541 uschar name[64];
542 int namelen = 0;
543 BOOL redef = FALSE;
544 macro_item *m;
545 macro_item *mlast = NULL;
546
547 while (isalnum(*s) || *s == '_')
548 {
549 if (namelen >= sizeof(name) - 1)
550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
551 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
552 name[namelen++] = *s++;
553 }
554 name[namelen] = 0;
555
556 while (isspace(*s)) s++;
557 if (*s++ != '=')
558 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
559
560 if (*s == '=')
561 {
562 redef = TRUE;
563 s++;
564 }
565 while (isspace(*s)) s++;
566
567 /* If an existing macro of the same name was defined on the command line, we
568 just skip this definition. It's an error to attempt to redefine a macro without
569 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
570 It is also an error to define a macro whose name begins with the name of a
571 previously defined macro. Note: it is documented that the other way round
572 works. */
573
574 for (m = macros; m != NULL; m = m->next)
575 {
576 int len = Ustrlen(m->name);
577
578 if (Ustrcmp(m->name, name) == 0)
579 {
580 if (!m->command_line && !redef)
581 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
582 "defined (use \"==\" if you want to redefine it", name);
583 break;
584 }
585
586 if (len < namelen && Ustrstr(name, m->name) != NULL)
587 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
588 "a macro because previously defined macro \"%s\" is a substring",
589 name, m->name);
590
591 /* We cannot have this test, because it is documented that a substring
592 macro is permitted (there is even an example).
593 *
594 * if (len > namelen && Ustrstr(m->name, name) != NULL)
595 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
596 * "a macro because it is a substring of previously defined macro \"%s\"",
597 * name, m->name);
598 */
599
600 mlast = m;
601 }
602
603 /* Check for an overriding command-line definition. */
604
605 if (m != NULL && m->command_line) return;
606
607 /* Redefinition must refer to an existing macro. */
608
609 if (redef)
610 {
611 if (m == NULL)
612 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
613 "\"%s\"", name);
614 }
615
616 /* We have a new definition. The macro_item structure includes a final vector
617 called "name" which is one byte long. Thus, adding "namelen" gives us enough
618 room to store the "name" string. */
619
620 else
621 {
622 m = store_get(sizeof(macro_item) + namelen);
623 if (macros == NULL) macros = m; else mlast->next = m;
624 Ustrncpy(m->name, name, namelen);
625 m->name[namelen] = 0;
626 m->next = NULL;
627 m->command_line = FALSE;
628 }
629
630 /* Set the value of the new or redefined macro */
631
632 m->replacement = string_copy(s);
633 }
634
635
636
637
638
639 /*************************************************
640 * Read configuration line *
641 *************************************************/
642
643 /* A logical line of text is read from the configuration file into the big
644 buffer, taking account of macros, .includes, and continuations. The size of
645 big_buffer is increased if necessary. The count of configuration lines is
646 maintained. Physical input lines starting with # (ignoring leading white space,
647 and after macro replacement) and empty logical lines are always ignored.
648 Leading and trailing spaces are removed.
649
650 If we hit a line of the form "begin xxxx", the xxxx is placed in the
651 next_section vector, and the function returns NULL, indicating the end of a
652 configuration section. On end-of-file, NULL is returned with next_section
653 empty.
654
655 Arguments: none
656
657 Returns: a pointer to the first non-blank in the line,
658 or NULL if eof or end of section is reached
659 */
660
661 static uschar *
662 get_config_line(void)
663 {
664 int startoffset = 0; /* To first non-blank char in logical line */
665 int len = 0; /* Of logical line so far */
666 int newlen;
667 uschar *s, *ss;
668 macro_item *m;
669 BOOL macro_found;
670
671 /* Loop for handling continuation lines, skipping comments, and dealing with
672 .include files. */
673
674 for (;;)
675 {
676 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
677 {
678 if (config_file_stack != NULL) /* EOF inside .include */
679 {
680 (void)fclose(config_file);
681 config_file = config_file_stack->file;
682 config_filename = config_file_stack->filename;
683 config_lineno = config_file_stack->lineno;
684 config_file_stack = config_file_stack->next;
685 continue;
686 }
687
688 /* EOF at top level */
689
690 if (cstate_stack_ptr >= 0)
691 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
692 "Unexpected end of configuration file: .endif missing");
693
694 if (len != 0) break; /* EOF after continuation */
695 next_section[0] = 0; /* EOF at start of logical line */
696 return NULL;
697 }
698
699 config_lineno++;
700 newlen = len + Ustrlen(big_buffer + len);
701
702 /* Handle pathologically long physical lines - yes, it did happen - by
703 extending big_buffer at this point. The code also copes with very long
704 logical lines. */
705
706 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
707 {
708 uschar *newbuffer;
709 big_buffer_size += BIG_BUFFER_SIZE;
710 newbuffer = store_malloc(big_buffer_size);
711
712 /* This use of strcpy is OK because we know that the string in the old
713 buffer is shorter than the new buffer. */
714
715 Ustrcpy(newbuffer, big_buffer);
716 store_free(big_buffer);
717 big_buffer = newbuffer;
718 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
719 break;
720 newlen += Ustrlen(big_buffer + newlen);
721 }
722
723 /* Find the true start of the physical line - leading spaces are always
724 ignored. */
725
726 ss = big_buffer + len;
727 while (isspace(*ss)) ss++;
728
729 /* Process the physical line for macros. If this is the start of the logical
730 line, skip over initial text at the start of the line if it starts with an
731 upper case character followed by a sequence of name characters and an equals
732 sign, because that is the definition of a new macro, and we don't do
733 replacement therein. */
734
735 s = ss;
736 if (len == 0 && isupper(*s))
737 {
738 while (isalnum(*s) || *s == '_') s++;
739 while (isspace(*s)) s++;
740 if (*s != '=') s = ss; /* Not a macro definition */
741 }
742
743 /* For each defined macro, scan the line (from after XXX= if present),
744 replacing all occurrences of the macro. */
745
746 macro_found = FALSE;
747 for (m = macros; m != NULL; m = m->next)
748 {
749 uschar *p, *pp;
750 uschar *t = s;
751
752 while ((p = Ustrstr(t, m->name)) != NULL)
753 {
754 int moveby;
755 int namelen = Ustrlen(m->name);
756 int replen = Ustrlen(m->replacement);
757
758 /* Expand the buffer if necessary */
759
760 while (newlen - namelen + replen + 1 > big_buffer_size)
761 {
762 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
763 uschar *newbuffer = store_malloc(newsize);
764 memcpy(newbuffer, big_buffer, newlen + 1);
765 p = newbuffer + (p - big_buffer);
766 s = newbuffer + (s - big_buffer);
767 ss = newbuffer + (ss - big_buffer);
768 t = newbuffer + (t - big_buffer);
769 big_buffer_size = newsize;
770 store_free(big_buffer);
771 big_buffer = newbuffer;
772 }
773
774 /* Shuffle the remaining characters up or down in the buffer before
775 copying in the replacement text. Don't rescan the replacement for this
776 same macro. */
777
778 pp = p + namelen;
779 moveby = replen - namelen;
780 if (moveby != 0)
781 {
782 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
783 newlen += moveby;
784 }
785 Ustrncpy(p, m->replacement, replen);
786 t = p + replen;
787 macro_found = TRUE;
788 }
789 }
790
791 /* An empty macro replacement at the start of a line could mean that ss no
792 longer points to the first non-blank character. */
793
794 while (isspace(*ss)) ss++;
795
796 /* Check for comment lines - these are physical lines. */
797
798 if (*ss == '#') continue;
799
800 /* Handle conditionals, which are also applied to physical lines. Conditions
801 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
802 expansion occured on the rest of the line. A preliminary test for the leading
803 '.' saves effort on most lines. */
804
805 if (*ss == '.')
806 {
807 int i;
808
809 /* Search the list of conditional directives */
810
811 for (i = 0; i < cond_list_size; i++)
812 {
813 int n;
814 cond_item *c = cond_list+i;
815 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
816
817 /* The following character must be white space or end of string */
818
819 n = ss[1 + c->namelen];
820 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
821
822 /* .ifdef and .ifndef push the current state onto the stack, then set
823 a new one from the table. Stack overflow is an error */
824
825 if (c->pushpop > 0)
826 {
827 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
828 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
829 ".%s nested too deeply", c->name);
830 cstate_stack[++cstate_stack_ptr] = cstate;
831 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
832 }
833
834 /* For any of the others, stack underflow is an error. The next state
835 comes either from the stack (.endif) or from the table. */
836
837 else
838 {
839 if (cstate_stack_ptr < 0)
840 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
841 ".%s without matching .ifdef", c->name);
842 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
843 next_cstate[cstate][macro_found? c->action1 : c->action2];
844 }
845
846 /* Having dealt with a directive, break the loop */
847
848 break;
849 }
850
851 /* If we have handled a conditional directive, continue with the next
852 physical line. Otherwise, fall through. */
853
854 if (i < cond_list_size) continue;
855 }
856
857 /* If the conditional state is not 0 (actively using these lines), ignore
858 this input line. */
859
860 if (cstate != 0) continue; /* Conditional skip */
861
862 /* Handle .include lines - these are also physical lines. */
863
864 if (Ustrncmp(ss, ".include", 8) == 0 &&
865 (isspace(ss[8]) ||
866 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
867 {
868 uschar *t;
869 int include_if_exists = isspace(ss[8])? 0 : 10;
870 config_file_item *save;
871 struct stat statbuf;
872
873 ss += 9 + include_if_exists;
874 while (isspace(*ss)) ss++;
875 t = ss + Ustrlen(ss);
876 while (t > ss && isspace(t[-1])) t--;
877 if (*ss == '\"' && t[-1] == '\"')
878 {
879 ss++;
880 t--;
881 }
882 *t = 0;
883
884 if (*ss != '/')
885 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
886 "absolute path \"%s\"", ss);
887
888 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
889
890 save = store_get(sizeof(config_file_item));
891 save->next = config_file_stack;
892 config_file_stack = save;
893 save->file = config_file;
894 save->filename = config_filename;
895 save->lineno = config_lineno;
896
897 config_file = Ufopen(ss, "rb");
898 if (config_file == NULL)
899 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
900 "configuration file %s", ss);
901 config_filename = string_copy(ss);
902 config_lineno = 0;
903 continue;
904 }
905
906 /* If this is the start of the logical line, remember where the non-blank
907 data starts. Otherwise shuffle down continuation lines to remove leading
908 white space. */
909
910 if (len == 0)
911 startoffset = ss - big_buffer;
912 else
913 {
914 s = big_buffer + len;
915 if (ss > s)
916 {
917 memmove(s, ss, (newlen - len) - (ss - s) + 1);
918 newlen -= ss - s;
919 }
920 }
921
922 /* Accept the new addition to the line. Remove trailing white space. */
923
924 len = newlen;
925 while (len > 0 && isspace(big_buffer[len-1])) len--;
926 big_buffer[len] = 0;
927
928 /* We are done if the line does not end in backslash and contains some data.
929 Empty logical lines are ignored. For continuations, remove the backslash and
930 go round the loop to read the continuation line. */
931
932 if (len > 0)
933 {
934 if (big_buffer[len-1] != '\\') break; /* End of logical line */
935 big_buffer[--len] = 0; /* Remove backslash */
936 }
937 } /* Loop for reading multiple physical lines */
938
939 /* We now have a logical line. Test for the end of a configuration section (or,
940 more accurately, for the start of the next section). Place the name of the next
941 section in next_section, and return NULL. If the name given is longer than
942 next_section, truncate it. It will be unrecognized later, because all the known
943 section names do fit. Leave space for pluralizing. */
944
945 s = big_buffer + startoffset; /* First non-space character */
946 if (strncmpic(s, US"begin ", 6) == 0)
947 {
948 s += 6;
949 while (isspace(*s)) s++;
950 if (big_buffer + len - s > sizeof(next_section) - 2)
951 s[sizeof(next_section) - 2] = 0;
952 Ustrcpy(next_section, s);
953 return NULL;
954 }
955
956 /* Return the first non-blank character. */
957
958 return s;
959 }
960
961
962
963 /*************************************************
964 * Read a name *
965 *************************************************/
966
967 /* The yield is the pointer to the next uschar. Names longer than the
968 output space are silently truncated. This function is also used from acl.c when
969 parsing ACLs.
970
971 Arguments:
972 name where to put the name
973 len length of name
974 s input pointer
975
976 Returns: new input pointer
977 */
978
979 uschar *
980 readconf_readname(uschar *name, int len, uschar *s)
981 {
982 int p = 0;
983 while (isspace(*s)) s++;
984 if (isalpha(*s))
985 {
986 while (isalnum(*s) || *s == '_')
987 {
988 if (p < len-1) name[p++] = *s;
989 s++;
990 }
991 }
992 name[p] = 0;
993 while (isspace(*s)) s++;
994 return s;
995 }
996
997
998
999
1000 /*************************************************
1001 * Read a time value *
1002 *************************************************/
1003
1004 /* This function is also called from outside, to read argument
1005 time values. The format of a time value is:
1006
1007 [<n>w][<n>d][<n>h][<n>m][<n>s]
1008
1009 as long as at least one is present. If a format error is encountered,
1010 return a negative value. The value must be terminated by the given
1011 terminator.
1012
1013 Arguments:
1014 s input pointer
1015 terminator required terminating character
1016 return_msec if TRUE, allow fractional seconds and return milliseconds
1017
1018 Returns: the time value, or -1 on syntax error
1019 value is seconds if return_msec is FALSE
1020 value is milliseconds if return_msec is TRUE
1021 */
1022
1023 int
1024 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
1025 {
1026 int yield = 0;
1027 for (;;)
1028 {
1029 int value, count;
1030 double fraction;
1031
1032 if (!isdigit(*s)) return -1;
1033 (void)sscanf(CS s, "%d%n", &value, &count);
1034 s += count;
1035
1036 switch (*s)
1037 {
1038 case 'w': value *= 7;
1039 case 'd': value *= 24;
1040 case 'h': value *= 60;
1041 case 'm': value *= 60;
1042 case 's': s++;
1043 break;
1044
1045 case '.':
1046 if (!return_msec) return -1;
1047 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1048 s += count;
1049 if (*s++ != 's') return -1;
1050 yield += (int)(fraction * 1000.0);
1051 break;
1052
1053 default: return -1;
1054 }
1055
1056 if (return_msec) value *= 1000;
1057 yield += value;
1058 if (*s == terminator) return yield;
1059 }
1060 /* Control never reaches here. */
1061 }
1062
1063
1064
1065 /*************************************************
1066 * Read a fixed point value *
1067 *************************************************/
1068
1069 /* The value is returned *1000
1070
1071 Arguments:
1072 s input pointer
1073 terminator required terminator
1074
1075 Returns: the value, or -1 on error
1076 */
1077
1078 static int
1079 readconf_readfixed(uschar *s, int terminator)
1080 {
1081 int yield = 0;
1082 int value, count;
1083 if (!isdigit(*s)) return -1;
1084 (void)sscanf(CS s, "%d%n", &value, &count);
1085 s += count;
1086 yield = value * 1000;
1087 if (*s == '.')
1088 {
1089 int m = 100;
1090 while (isdigit((*(++s))))
1091 {
1092 yield += (*s - '0') * m;
1093 m /= 10;
1094 }
1095 }
1096
1097 return (*s == terminator)? yield : (-1);
1098 }
1099
1100
1101
1102 /*************************************************
1103 * Find option in list *
1104 *************************************************/
1105
1106 /* The lists are always in order, so binary chop can be used.
1107
1108 Arguments:
1109 name the option name to search for
1110 ol the first entry in the option list
1111 last one more than the offset of the last entry in the option list
1112
1113 Returns: pointer to an option entry, or NULL if not found
1114 */
1115
1116 static optionlist *
1117 find_option(uschar *name, optionlist *ol, int last)
1118 {
1119 int first = 0;
1120 while (last > first)
1121 {
1122 int middle = (first + last)/2;
1123 int c = Ustrcmp(name, ol[middle].name);
1124 if (c == 0) return ol + middle;
1125 else if (c > 0) first = middle + 1;
1126 else last = middle;
1127 }
1128 return NULL;
1129 }
1130
1131
1132
1133 /*************************************************
1134 * Find a set flag in option list *
1135 *************************************************/
1136
1137 /* Because some versions of Unix make no restrictions on the values of uids and
1138 gids (even negative ones), we cannot represent "unset" by a special value.
1139 There is therefore a separate boolean variable for each one indicating whether
1140 a value is set or not. This function returns a pointer to the boolean, given
1141 the original option name. It is a major disaster if the flag cannot be found.
1142
1143 Arguments:
1144 name the name of the uid or gid option
1145 oltop points to the start of the relevant option list
1146 last one more than the offset of the last item in the option list
1147 data_block NULL when reading main options => data values in the option
1148 list are absolute addresses; otherwise they are byte offsets
1149 in data_block (used for driver options)
1150
1151 Returns: a pointer to the boolean flag.
1152 */
1153
1154 static BOOL *
1155 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1156 {
1157 optionlist *ol;
1158 uschar name2[64];
1159 sprintf(CS name2, "*set_%.50s", name);
1160 ol = find_option(name2, oltop, last);
1161 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1162 "Exim internal error: missing set flag for %s", name);
1163 return (data_block == NULL)? (BOOL *)(ol->value) :
1164 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1165 }
1166
1167
1168
1169
1170 /*************************************************
1171 * Output extra characters message and die *
1172 *************************************************/
1173
1174 /* Called when an option line has junk on the end. Sometimes this is because
1175 the sysadmin thinks comments are permitted.
1176
1177 Arguments:
1178 s points to the extra characters
1179 t1..t3 strings to insert in the log message
1180
1181 Returns: doesn't return; dies
1182 */
1183
1184 static void
1185 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1186 {
1187 uschar *comment = US"";
1188 if (*s == '#') comment = US" (# is comment only at line start)";
1189 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1190 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1191 }
1192
1193
1194
1195 /*************************************************
1196 * Read rewrite information *
1197 *************************************************/
1198
1199 /* Each line of rewrite information contains:
1200
1201 . A complete address in the form user@domain, possibly with
1202 leading * for each part; or alternatively, a regex.
1203
1204 . A replacement string (which will be expanded).
1205
1206 . An optional sequence of one-letter flags, indicating which
1207 headers etc. to apply this rule to.
1208
1209 All this is decoded and placed into a control block. The OR of the flags is
1210 maintained in a common word.
1211
1212 Arguments:
1213 p points to the string that makes up the rule
1214 existflags points to the overall flag word
1215 isglobal TRUE if reading global rewrite rules
1216
1217 Returns: the control block for the parsed rule.
1218 */
1219
1220 static rewrite_rule *
1221 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1222 {
1223 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1224
1225 next->next = NULL;
1226 next->key = string_dequote(&p);
1227
1228 while (isspace(*p)) p++;
1229 if (*p == 0)
1230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1231 "missing rewrite replacement string");
1232
1233 next->flags = 0;
1234 next->replacement = string_dequote(&p);
1235
1236 while (*p != 0) switch (*p++)
1237 {
1238 case ' ': case '\t': break;
1239
1240 case 'q': next->flags |= rewrite_quit; break;
1241 case 'w': next->flags |= rewrite_whole; break;
1242
1243 case 'h': next->flags |= rewrite_all_headers; break;
1244 case 's': next->flags |= rewrite_sender; break;
1245 case 'f': next->flags |= rewrite_from; break;
1246 case 't': next->flags |= rewrite_to; break;
1247 case 'c': next->flags |= rewrite_cc; break;
1248 case 'b': next->flags |= rewrite_bcc; break;
1249 case 'r': next->flags |= rewrite_replyto; break;
1250
1251 case 'E': next->flags |= rewrite_all_envelope; break;
1252 case 'F': next->flags |= rewrite_envfrom; break;
1253 case 'T': next->flags |= rewrite_envto; break;
1254
1255 case 'Q': next->flags |= rewrite_qualify; break;
1256 case 'R': next->flags |= rewrite_repeat; break;
1257
1258 case 'S':
1259 next->flags |= rewrite_smtp;
1260 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1261 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1262 "rewrite rule has the S flag but is not a regular expression");
1263 break;
1264
1265 default:
1266 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1267 "unknown rewrite flag character '%c' "
1268 "(could be missing quotes round replacement item)", p[-1]);
1269 break;
1270 }
1271
1272 /* If no action flags are set, set all the "normal" rewrites. */
1273
1274 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1275 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1276
1277 /* Remember which exist, for optimization, and return the rule */
1278
1279 *existflags |= next->flags;
1280 return next;
1281 }
1282
1283
1284
1285
1286 /*************************************************
1287 * Read global rewrite information *
1288 *************************************************/
1289
1290 /* Each line is a single rewrite rule; it is parsed into a control block
1291 by readconf_one_rewrite(), and its flags are ORed into the global flag
1292 word rewrite_existflags. */
1293
1294 void
1295 readconf_rewrites(void)
1296 {
1297 rewrite_rule **chain = &global_rewrite_rules;
1298 uschar *p;
1299
1300 while ((p = get_config_line()) != NULL)
1301 {
1302 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1303 *chain = next;
1304 chain = &(next->next);
1305 }
1306 }
1307
1308
1309
1310 /*************************************************
1311 * Read a string *
1312 *************************************************/
1313
1314 /* Strings are read into the normal store pool. As long we aren't too
1315 near the end of the current block, the string will just use what is necessary
1316 on the top of the stacking pool, because string_cat() uses the extension
1317 mechanism.
1318
1319 Argument:
1320 s the rest of the input line
1321 name the option name (for errors)
1322
1323 Returns: pointer to the string
1324 */
1325
1326 static uschar *
1327 read_string(uschar *s, uschar *name)
1328 {
1329 uschar *yield;
1330 uschar *ss;
1331
1332 if (*s != '\"') return string_copy(s);
1333
1334 ss = s;
1335 yield = string_dequote(&s);
1336
1337 if (s == ss+1 || s[-1] != '\"')
1338 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1339 "missing quote at end of string value for %s", name);
1340
1341 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1342
1343 return yield;
1344 }
1345
1346
1347 /*************************************************
1348 * Handle option line *
1349 *************************************************/
1350
1351 /* This function is called from several places to process a line containing the
1352 setting of an option. The first argument is the line to be decoded; it has been
1353 checked not to be empty and not to start with '#'. Trailing newlines and white
1354 space have been removed. The second argument is a pointer to the list of
1355 variable names that are to be recognized, together with their types and
1356 locations, and the third argument gives the number of entries in the list.
1357
1358 The fourth argument is a pointer to a data block. If it is NULL, then the data
1359 values in the options list are absolute addresses. Otherwise, they are byte
1360 offsets in the data block.
1361
1362 String option data may continue onto several lines; this function reads further
1363 data from config_file if necessary.
1364
1365 The yield of this function is normally zero. If a string continues onto
1366 multiple lines, then the data value is permitted to be followed by a comma
1367 or a semicolon (for use in drivers) and the yield is that character.
1368
1369 Arguments:
1370 buffer contains the configuration line to be handled
1371 oltop points to the start of the relevant option list
1372 last one more than the offset of the last item in the option list
1373 data_block NULL when reading main options => data values in the option
1374 list are absolute addresses; otherwise they are byte offsets
1375 in data_block when they have opt_public set; otherwise
1376 they are byte offsets in data_block->options_block.
1377 unknown_txt format string to use in panic message for unknown option;
1378 must contain %s for option name
1379 if given as NULL, don't panic on unknown option
1380
1381 Returns: TRUE if an option was read successfully,
1382 FALSE false for an unknown option if unknown_txt == NULL,
1383 otherwise panic and die on an unknown option
1384 */
1385
1386 static BOOL
1387 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1388 void *data_block, uschar *unknown_txt)
1389 {
1390 int ptr = 0;
1391 int offset = 0;
1392 int n, count, type, value;
1393 int issecure = 0;
1394 uid_t uid;
1395 gid_t gid;
1396 BOOL boolvalue = TRUE;
1397 BOOL freesptr = TRUE;
1398 optionlist *ol, *ol2;
1399 struct passwd *pw;
1400 void *reset_point;
1401 int intbase = 0;
1402 uschar *inttype = US"";
1403 uschar *sptr;
1404 uschar *s = buffer;
1405 uschar *saved_condition, *strtemp;
1406 uschar **str_target;
1407 uschar name[64];
1408 uschar name2[64];
1409
1410 /* There may be leading spaces; thereafter, we expect an option name starting
1411 with a letter. */
1412
1413 while (isspace(*s)) s++;
1414 if (!isalpha(*s))
1415 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1416
1417 /* Read the name of the option, and skip any subsequent white space. If
1418 it turns out that what we read was "hide", set the flag indicating that
1419 this is a secure option, and loop to read the next word. */
1420
1421 for (n = 0; n < 2; n++)
1422 {
1423 while (isalnum(*s) || *s == '_')
1424 {
1425 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1426 s++;
1427 }
1428 name[ptr] = 0;
1429 while (isspace(*s)) s++;
1430 if (Ustrcmp(name, "hide") != 0) break;
1431 issecure = opt_secure;
1432 ptr = 0;
1433 }
1434
1435 /* Deal with "no_" or "not_" here for booleans */
1436
1437 if (Ustrncmp(name, "no_", 3) == 0)
1438 {
1439 boolvalue = FALSE;
1440 offset = 3;
1441 }
1442
1443 if (Ustrncmp(name, "not_", 4) == 0)
1444 {
1445 boolvalue = FALSE;
1446 offset = 4;
1447 }
1448
1449 /* Search the list for the given name. A non-existent name, or an option that
1450 is set twice, is a disaster. */
1451
1452 ol = find_option(name + offset, oltop, last);
1453
1454 if (ol == NULL)
1455 {
1456 if (unknown_txt == NULL) return FALSE;
1457 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1458 }
1459
1460 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1461 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1462 "\"%s\" option set for the second time", name);
1463
1464 ol->type |= opt_set | issecure;
1465 type = ol->type & opt_mask;
1466
1467 /* Types with data values must be followed by '='; the "no[t]_" prefix
1468 applies only to boolean values. */
1469
1470 if (type < opt_bool || type > opt_bool_last)
1471 {
1472 if (offset != 0)
1473 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1474 "negation prefix applied to a non-boolean option");
1475 if (*s == 0)
1476 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1477 "unexpected end of line (data missing) after %s", name);
1478 if (*s != '=')
1479 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1480 }
1481
1482 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1483 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1484 ultimately expands to one of those values. */
1485
1486 else if (*s != 0 && (offset != 0 || *s != '='))
1487 extra_chars_error(s, US"boolean option ", name, US"");
1488
1489 /* Skip white space after = */
1490
1491 if (*s == '=') while (isspace((*(++s))));
1492
1493 /* If there is a data block and the opt_public flag is not set, change
1494 the data block pointer to the private options block. */
1495
1496 if (data_block != NULL && (ol->type & opt_public) == 0)
1497 data_block = (void *)(((driver_instance *)data_block)->options_block);
1498
1499 /* Now get the data according to the type. */
1500
1501 switch (type)
1502 {
1503 /* If a string value is not enclosed in quotes, it consists of
1504 the rest of the current line, verbatim. Otherwise, string escapes
1505 are processed.
1506
1507 A transport is specified as a string, which is then looked up in the
1508 list of transports. A search type is specified as one of a number of
1509 known strings.
1510
1511 A set or rewrite rules for a driver is specified as a string, which is
1512 then parsed into a suitable chain of control blocks.
1513
1514 Uids and gids are specified as strings which are then looked up in the
1515 passwd file. Lists of uids and gids are similarly specified as colon-
1516 separated strings. */
1517
1518 case opt_stringptr:
1519 case opt_uid:
1520 case opt_gid:
1521 case opt_expand_uid:
1522 case opt_expand_gid:
1523 case opt_uidlist:
1524 case opt_gidlist:
1525 case opt_rewrite:
1526
1527 reset_point = sptr = read_string(s, name);
1528
1529 /* Having read a string, we now have several different ways of using it,
1530 depending on the data type, so do another switch. If keeping the actual
1531 string is not required (because it is interpreted), freesptr is set TRUE,
1532 and at the end we reset the pool. */
1533
1534 switch (type)
1535 {
1536 /* If this was a string, set the variable to point to the new string,
1537 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1538 rules, we still keep the string (for printing), and parse the rules into a
1539 control block and flags word. */
1540
1541 case opt_stringptr:
1542 if (data_block == NULL)
1543 str_target = (uschar **)(ol->value);
1544 else
1545 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1546 if (ol->type & opt_rep_con)
1547 {
1548 /* We already have a condition, we're conducting a crude hack to let
1549 multiple condition rules be chained together, despite storing them in
1550 text form. */
1551 saved_condition = *str_target;
1552 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1553 saved_condition, sptr);
1554 *str_target = string_copy_malloc(strtemp);
1555 /* TODO(pdp): there is a memory leak here and just below
1556 when we set 3 or more conditions; I still don't
1557 understand the store mechanism enough to know
1558 what's the safe way to free content from an earlier store.
1559 AFAICT, stores stack, so freeing an early stored item also stores
1560 all data alloc'd after it. If we knew conditions were adjacent,
1561 we could survive that, but we don't. So I *think* we need to take
1562 another bit from opt_type to indicate "malloced"; this seems like
1563 quite a hack, especially for this one case. It also means that
1564 we can't ever reclaim the store from the *first* condition.
1565
1566 Because we only do this once, near process start-up, I'm prepared to
1567 let this slide for the time being, even though it rankles. */
1568 }
1569 else if (ol->type & opt_rep_str)
1570 {
1571 uschar sep = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1572 uschar * cp;
1573
1574 /* Strip trailing whitespace and seperators */
1575 for (cp = sptr + Ustrlen(sptr) - 1;
1576 cp >= sptr && (*cp == '\n' || *cp == '\t' || *cp == ' ' || *cp == sep);
1577 cp--) *cp = '\0';
1578
1579 if (cp >= sptr)
1580 *str_target = string_copy_malloc(
1581 *str_target ? string_sprintf("%s%c%s", *str_target, sep, sptr)
1582 : sptr);
1583 }
1584 else
1585 {
1586 *str_target = sptr;
1587 freesptr = FALSE;
1588 }
1589 break;
1590
1591 case opt_rewrite:
1592 if (data_block == NULL)
1593 *((uschar **)(ol->value)) = sptr;
1594 else
1595 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1596 freesptr = FALSE;
1597 if (type == opt_rewrite)
1598 {
1599 int sep = 0;
1600 int *flagptr;
1601 uschar *p = sptr;
1602 rewrite_rule **chain;
1603 optionlist *ol3;
1604
1605 sprintf(CS name2, "*%.50s_rules", name);
1606 ol2 = find_option(name2, oltop, last);
1607 sprintf(CS name2, "*%.50s_flags", name);
1608 ol3 = find_option(name2, oltop, last);
1609
1610 if (ol2 == NULL || ol3 == NULL)
1611 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1612 "rewrite rules not available for driver");
1613
1614 if (data_block == NULL)
1615 {
1616 chain = (rewrite_rule **)(ol2->value);
1617 flagptr = (int *)(ol3->value);
1618 }
1619 else
1620 {
1621 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1622 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1623 }
1624
1625 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1626 != NULL)
1627 {
1628 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1629 *chain = next;
1630 chain = &(next->next);
1631 }
1632
1633 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1635 "non-header rewrite - not allowed at transport time -");
1636 }
1637 break;
1638
1639 /* If it was an expanded uid, see if there is any expansion to be
1640 done by checking for the presence of a $ character. If there is, save it
1641 in the corresponding *expand_user option field. Otherwise, fall through
1642 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1643 of data. */
1644
1645 case opt_expand_uid:
1646 sprintf(CS name2, "*expand_%.50s", name);
1647 ol2 = find_option(name2, oltop, last);
1648 if (ol2 != NULL)
1649 {
1650 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1651
1652 if (data_block == NULL)
1653 *((uschar **)(ol2->value)) = ss;
1654 else
1655 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1656
1657 if (ss != NULL)
1658 {
1659 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1660 freesptr = FALSE;
1661 break;
1662 }
1663 }
1664
1665 /* Look up a fixed uid, and also make use of the corresponding gid
1666 if a passwd entry is returned and the gid has not been set. */
1667
1668 case opt_uid:
1669 if (!route_finduser(sptr, &pw, &uid))
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1671 if (data_block == NULL)
1672 *((uid_t *)(ol->value)) = uid;
1673 else
1674 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1675
1676 /* Set the flag indicating a fixed value is set */
1677
1678 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1679
1680 /* Handle matching gid if we have a passwd entry: done by finding the
1681 same name with terminating "user" changed to "group"; if not found,
1682 ignore. Also ignore if the value is already set. */
1683
1684 if (pw == NULL) break;
1685 Ustrcpy(name+Ustrlen(name)-4, "group");
1686 ol2 = find_option(name, oltop, last);
1687 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1688 (ol2->type & opt_mask) == opt_expand_gid))
1689 {
1690 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1691 if (! *set_flag)
1692 {
1693 if (data_block == NULL)
1694 *((gid_t *)(ol2->value)) = pw->pw_gid;
1695 else
1696 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1697 *set_flag = TRUE;
1698 }
1699 }
1700 break;
1701
1702 /* If it was an expanded gid, see if there is any expansion to be
1703 done by checking for the presence of a $ character. If there is, save it
1704 in the corresponding *expand_user option field. Otherwise, fall through
1705 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1706 of data. */
1707
1708 case opt_expand_gid:
1709 sprintf(CS name2, "*expand_%.50s", name);
1710 ol2 = find_option(name2, oltop, last);
1711 if (ol2 != NULL)
1712 {
1713 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1714
1715 if (data_block == NULL)
1716 *((uschar **)(ol2->value)) = ss;
1717 else
1718 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1719
1720 if (ss != NULL)
1721 {
1722 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1723 freesptr = FALSE;
1724 break;
1725 }
1726 }
1727
1728 /* Handle freestanding gid */
1729
1730 case opt_gid:
1731 if (!route_findgroup(sptr, &gid))
1732 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1733 if (data_block == NULL)
1734 *((gid_t *)(ol->value)) = gid;
1735 else
1736 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1737 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1738 break;
1739
1740 /* If it was a uid list, look up each individual entry, and build
1741 a vector of uids, with a count in the first element. Put the vector
1742 in malloc store so we can free the string. (We are reading into
1743 permanent store already.) */
1744
1745 case opt_uidlist:
1746 {
1747 int count = 1;
1748 uid_t *list;
1749 int ptr = 0;
1750 uschar *p;
1751 uschar *op = expand_string (sptr);
1752
1753 if (op == NULL)
1754 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1755 name, expand_string_message);
1756
1757 p = op;
1758 if (*p != 0) count++;
1759 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1760 list = store_malloc(count*sizeof(uid_t));
1761 list[ptr++] = (uid_t)(count - 1);
1762
1763 if (data_block == NULL)
1764 *((uid_t **)(ol->value)) = list;
1765 else
1766 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1767
1768 p = op;
1769 while (count-- > 1)
1770 {
1771 int sep = 0;
1772 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1773 if (!route_finduser(big_buffer, NULL, &uid))
1774 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1775 big_buffer);
1776 list[ptr++] = uid;
1777 }
1778 }
1779 break;
1780
1781 /* If it was a gid list, look up each individual entry, and build
1782 a vector of gids, with a count in the first element. Put the vector
1783 in malloc store so we can free the string. (We are reading into permanent
1784 store already.) */
1785
1786 case opt_gidlist:
1787 {
1788 int count = 1;
1789 gid_t *list;
1790 int ptr = 0;
1791 uschar *p;
1792 uschar *op = expand_string (sptr);
1793
1794 if (op == NULL)
1795 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1796 name, expand_string_message);
1797
1798 p = op;
1799 if (*p != 0) count++;
1800 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1801 list = store_malloc(count*sizeof(gid_t));
1802 list[ptr++] = (gid_t)(count - 1);
1803
1804 if (data_block == NULL)
1805 *((gid_t **)(ol->value)) = list;
1806 else
1807 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1808
1809 p = op;
1810 while (count-- > 1)
1811 {
1812 int sep = 0;
1813 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1814 if (!route_findgroup(big_buffer, &gid))
1815 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1816 big_buffer);
1817 list[ptr++] = gid;
1818 }
1819 }
1820 break;
1821 }
1822
1823 /* Release store if the value of the string doesn't need to be kept. */
1824
1825 if (freesptr) store_reset(reset_point);
1826 break;
1827
1828 /* Expanded boolean: if no characters follow, or if there are no dollar
1829 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1830 save the string for later expansion in the alternate place. */
1831
1832 case opt_expand_bool:
1833 if (*s != 0 && Ustrchr(s, '$') != 0)
1834 {
1835 sprintf(CS name2, "*expand_%.50s", name);
1836 ol2 = find_option(name2, oltop, last);
1837 if (ol2 != NULL)
1838 {
1839 reset_point = sptr = read_string(s, name);
1840 if (data_block == NULL)
1841 *((uschar **)(ol2->value)) = sptr;
1842 else
1843 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1844 freesptr = FALSE;
1845 break;
1846 }
1847 }
1848 /* Fall through */
1849
1850 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1851 look for yes/not/true/false. Some booleans are stored in a single bit in
1852 a single int. There's a special fudge for verify settings; without a suffix
1853 they set both xx_sender and xx_recipient. The table points to the sender
1854 value; search subsequently for the recipient. There's another special case:
1855 opt_bool_set also notes when a boolean has been set. */
1856
1857 case opt_bool:
1858 case opt_bit:
1859 case opt_bool_verify:
1860 case opt_bool_set:
1861 if (*s != 0)
1862 {
1863 s = readconf_readname(name2, 64, s);
1864 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1865 boolvalue = TRUE;
1866 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1867 boolvalue = FALSE;
1868 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1869 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1870 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1871 US"for boolean option ", name);
1872 }
1873
1874 /* Handle single-bit type. */
1875
1876 if (type == opt_bit)
1877 {
1878 int bit = 1 << ((ol->type >> 16) & 31);
1879 int *ptr = (data_block == NULL)?
1880 (int *)(ol->value) :
1881 (int *)((uschar *)data_block + (long int)ol->value);
1882 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1883 break;
1884 }
1885
1886 /* Handle full BOOL types */
1887
1888 if (data_block == NULL)
1889 *((BOOL *)(ol->value)) = boolvalue;
1890 else
1891 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1892
1893 /* Verify fudge */
1894
1895 if (type == opt_bool_verify)
1896 {
1897 sprintf(CS name2, "%.50s_recipient", name + offset);
1898 ol2 = find_option(name2, oltop, last);
1899 if (ol2 != NULL)
1900 {
1901 if (data_block == NULL)
1902 *((BOOL *)(ol2->value)) = boolvalue;
1903 else
1904 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1905 }
1906 }
1907
1908 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1909
1910 else if (type == opt_bool_set)
1911 {
1912 sprintf(CS name2, "*set_%.50s", name + offset);
1913 ol2 = find_option(name2, oltop, last);
1914 if (ol2 != NULL)
1915 {
1916 if (data_block == NULL)
1917 *((BOOL *)(ol2->value)) = TRUE;
1918 else
1919 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1920 }
1921 }
1922 break;
1923
1924 /* Octal integer */
1925
1926 case opt_octint:
1927 intbase = 8;
1928 inttype = US"octal ";
1929
1930 /* Integer: a simple(ish) case; allow octal and hex formats, and
1931 suffixes K and M. The different types affect output, not input. */
1932
1933 case opt_mkint:
1934 case opt_int:
1935 {
1936 uschar *endptr;
1937 long int lvalue;
1938
1939 errno = 0;
1940 lvalue = strtol(CS s, CSS &endptr, intbase);
1941
1942 if (endptr == s)
1943 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1944 inttype, name);
1945
1946 if (errno != ERANGE)
1947 {
1948 if (tolower(*endptr) == 'k')
1949 {
1950 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1951 else lvalue *= 1024;
1952 endptr++;
1953 }
1954 else if (tolower(*endptr) == 'm')
1955 {
1956 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1957 errno = ERANGE;
1958 else lvalue *= 1024*1024;
1959 endptr++;
1960 }
1961 }
1962
1963 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1964 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1965 "absolute value of integer \"%s\" is too large (overflow)", s);
1966
1967 while (isspace(*endptr)) endptr++;
1968 if (*endptr != 0)
1969 extra_chars_error(endptr, inttype, US"integer value for ", name);
1970
1971 value = (int)lvalue;
1972 }
1973
1974 if (data_block == NULL)
1975 *((int *)(ol->value)) = value;
1976 else
1977 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1978 break;
1979
1980 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1981 M. */
1982
1983 case opt_Kint:
1984 {
1985 uschar *endptr;
1986 errno = 0;
1987 value = strtol(CS s, CSS &endptr, intbase);
1988
1989 if (endptr == s)
1990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1991 inttype, name);
1992
1993 if (errno != ERANGE)
1994 {
1995 if (tolower(*endptr) == 'm')
1996 {
1997 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1998 else value *= 1024;
1999 endptr++;
2000 }
2001 else if (tolower(*endptr) == 'k')
2002 {
2003 endptr++;
2004 }
2005 else
2006 {
2007 value = (value + 512)/1024;
2008 }
2009 }
2010
2011 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2012 "absolute value of integer \"%s\" is too large (overflow)", s);
2013
2014 while (isspace(*endptr)) endptr++;
2015 if (*endptr != 0)
2016 extra_chars_error(endptr, inttype, US"integer value for ", name);
2017 }
2018
2019 if (data_block == NULL)
2020 *((int *)(ol->value)) = value;
2021 else
2022 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2023 break;
2024
2025 /* Fixed-point number: held to 3 decimal places. */
2026
2027 case opt_fixed:
2028 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2029 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2030 "fixed-point number expected for %s", name);
2031
2032 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2033 "integer \"%s\" is too large (overflow)", s);
2034
2035 value *= 1000;
2036
2037 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2038 "integer \"%s\" is too large (overflow)", s);
2039
2040 if (s[count] == '.')
2041 {
2042 int d = 100;
2043 while (isdigit(s[++count]))
2044 {
2045 value += (s[count] - '0') * d;
2046 d /= 10;
2047 }
2048 }
2049
2050 while (isspace(s[count])) count++;
2051
2052 if (s[count] != 0)
2053 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2054
2055 if (data_block == NULL)
2056 *((int *)(ol->value)) = value;
2057 else
2058 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2059 break;
2060
2061 /* There's a special routine to read time values. */
2062
2063 case opt_time:
2064 value = readconf_readtime(s, 0, FALSE);
2065 if (value < 0)
2066 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2067 name);
2068 if (data_block == NULL)
2069 *((int *)(ol->value)) = value;
2070 else
2071 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2072 break;
2073
2074 /* A time list is a list of colon-separated times, with the first
2075 element holding the size of the list and the second the number of
2076 entries used. */
2077
2078 case opt_timelist:
2079 {
2080 int count = 0;
2081 int *list = (data_block == NULL)?
2082 (int *)(ol->value) :
2083 (int *)((uschar *)data_block + (long int)(ol->value));
2084
2085 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2086 {
2087 int terminator = 0;
2088 uschar *snext = Ustrchr(s, ':');
2089 if (snext != NULL)
2090 {
2091 uschar *ss = snext;
2092 while (ss > s && isspace(ss[-1])) ss--;
2093 terminator = *ss;
2094 }
2095 value = readconf_readtime(s, terminator, FALSE);
2096 if (value < 0)
2097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2098 name);
2099 if (count > 1 && value <= list[count])
2100 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2101 "time value out of order for %s", name);
2102 list[count+1] = value;
2103 if (snext == NULL) break;
2104 s = snext + 1;
2105 while (isspace(*s)) s++;
2106 }
2107
2108 if (count > list[0] - 2)
2109 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2110 name);
2111 if (count > 0 && list[2] == 0) count = 0;
2112 list[1] = count;
2113 }
2114
2115 break;
2116 }
2117
2118 return TRUE;
2119 }
2120
2121
2122
2123 /*************************************************
2124 * Print a time value *
2125 *************************************************/
2126
2127 /*
2128 Argument: a time value in seconds
2129 Returns: pointer to a fixed buffer containing the time as a string,
2130 in readconf_readtime() format
2131 */
2132
2133 uschar *
2134 readconf_printtime(int t)
2135 {
2136 int s, m, h, d, w;
2137 uschar *p = time_buffer;
2138
2139 if (t < 0)
2140 {
2141 *p++ = '-';
2142 t = -t;
2143 }
2144
2145 s = t % 60;
2146 t /= 60;
2147 m = t % 60;
2148 t /= 60;
2149 h = t % 24;
2150 t /= 24;
2151 d = t % 7;
2152 w = t/7;
2153
2154 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2155 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2156 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2157 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2158 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2159
2160 return time_buffer;
2161 }
2162
2163
2164
2165 /*************************************************
2166 * Print an individual option value *
2167 *************************************************/
2168
2169 /* This is used by the -bP option, so prints to the standard output.
2170 The entire options list is passed in as an argument, because some options come
2171 in pairs - typically uid/gid settings, which can either be explicit numerical
2172 values, or strings to be expanded later. If the numerical value is unset,
2173 search for "*expand_<name>" to see if there is a string equivalent.
2174
2175 Arguments:
2176 ol option entry, or NULL for an unknown option
2177 name option name
2178 options_block NULL for main configuration options; otherwise points to
2179 a driver block; if the option doesn't have opt_public
2180 set, then options_block->options_block is where the item
2181 resides.
2182 oltop points to the option list in which ol exists
2183 last one more than the offset of the last entry in optop
2184 no_labels do not show "foo = " at the start.
2185
2186 Returns: nothing
2187 */
2188
2189 static void
2190 print_ol(optionlist *ol, uschar *name, void *options_block,
2191 optionlist *oltop, int last, BOOL no_labels)
2192 {
2193 struct passwd *pw;
2194 struct group *gr;
2195 optionlist *ol2;
2196 void *value;
2197 uid_t *uidlist;
2198 gid_t *gidlist;
2199 uschar *s;
2200 uschar name2[64];
2201
2202 if (ol == NULL)
2203 {
2204 printf("%s is not a known option\n", name);
2205 return;
2206 }
2207
2208 /* Non-admin callers cannot see options that have been flagged secure by the
2209 "hide" prefix. */
2210
2211 if (!admin_user && (ol->type & opt_secure) != 0)
2212 {
2213 const char * const hidden = "<value not displayable>";
2214 if (no_labels)
2215 printf("%s\n", hidden);
2216 else
2217 printf("%s = %s\n", name, hidden);
2218 return;
2219 }
2220
2221 /* Else show the value of the option */
2222
2223 value = ol->value;
2224 if (options_block != NULL)
2225 {
2226 if ((ol->type & opt_public) == 0)
2227 options_block = (void *)(((driver_instance *)options_block)->options_block);
2228 value = (void *)((uschar *)options_block + (long int)value);
2229 }
2230
2231 switch(ol->type & opt_mask)
2232 {
2233 case opt_stringptr:
2234 case opt_rewrite: /* Show the text value */
2235 s = *((uschar **)value);
2236 if (!no_labels) printf("%s = ", name);
2237 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2238 break;
2239
2240 case opt_int:
2241 if (!no_labels) printf("%s = ", name);
2242 printf("%d\n", *((int *)value));
2243 break;
2244
2245 case opt_mkint:
2246 {
2247 int x = *((int *)value);
2248 if (x != 0 && (x & 1023) == 0)
2249 {
2250 int c = 'K';
2251 x >>= 10;
2252 if ((x & 1023) == 0)
2253 {
2254 c = 'M';
2255 x >>= 10;
2256 }
2257 if (!no_labels) printf("%s = ", name);
2258 printf("%d%c\n", x, c);
2259 }
2260 else
2261 {
2262 if (!no_labels) printf("%s = ", name);
2263 printf("%d\n", x);
2264 }
2265 }
2266 break;
2267
2268 case opt_Kint:
2269 {
2270 int x = *((int *)value);
2271 if (!no_labels) printf("%s = ", name);
2272 if (x == 0) printf("0\n");
2273 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2274 else printf("%dK\n", x);
2275 }
2276 break;
2277
2278 case opt_octint:
2279 if (!no_labels) printf("%s = ", name);
2280 printf("%#o\n", *((int *)value));
2281 break;
2282
2283 /* Can be negative only when "unset", in which case integer */
2284
2285 case opt_fixed:
2286 {
2287 int x = *((int *)value);
2288 int f = x % 1000;
2289 int d = 100;
2290 if (x < 0) printf("%s =\n", name); else
2291 {
2292 if (!no_labels) printf("%s = ", name);
2293 printf("%d.", x/1000);
2294 do
2295 {
2296 printf("%d", f/d);
2297 f %= d;
2298 d /= 10;
2299 }
2300 while (f != 0);
2301 printf("\n");
2302 }
2303 }
2304 break;
2305
2306 /* If the numerical value is unset, try for the string value */
2307
2308 case opt_expand_uid:
2309 if (! *get_set_flag(name, oltop, last, options_block))
2310 {
2311 sprintf(CS name2, "*expand_%.50s", name);
2312 ol2 = find_option(name2, oltop, last);
2313 if (ol2 != NULL)
2314 {
2315 void *value2 = ol2->value;
2316 if (options_block != NULL)
2317 value2 = (void *)((uschar *)options_block + (long int)value2);
2318 s = *((uschar **)value2);
2319 if (!no_labels) printf("%s = ", name);
2320 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2321 break;
2322 }
2323 }
2324
2325 /* Else fall through */
2326
2327 case opt_uid:
2328 if (!no_labels) printf("%s = ", name);
2329 if (! *get_set_flag(name, oltop, last, options_block))
2330 printf("\n");
2331 else
2332 {
2333 pw = getpwuid(*((uid_t *)value));
2334 if (pw == NULL)
2335 printf("%ld\n", (long int)(*((uid_t *)value)));
2336 else printf("%s\n", pw->pw_name);
2337 }
2338 break;
2339
2340 /* If the numerical value is unset, try for the string value */
2341
2342 case opt_expand_gid:
2343 if (! *get_set_flag(name, oltop, last, options_block))
2344 {
2345 sprintf(CS name2, "*expand_%.50s", name);
2346 ol2 = find_option(name2, oltop, last);
2347 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2348 {
2349 void *value2 = ol2->value;
2350 if (options_block != NULL)
2351 value2 = (void *)((uschar *)options_block + (long int)value2);
2352 s = *((uschar **)value2);
2353 if (!no_labels) printf("%s = ", name);
2354 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2355 break;
2356 }
2357 }
2358
2359 /* Else fall through */
2360
2361 case opt_gid:
2362 if (!no_labels) printf("%s = ", name);
2363 if (! *get_set_flag(name, oltop, last, options_block))
2364 printf("\n");
2365 else
2366 {
2367 gr = getgrgid(*((int *)value));
2368 if (gr == NULL)
2369 printf("%ld\n", (long int)(*((int *)value)));
2370 else printf("%s\n", gr->gr_name);
2371 }
2372 break;
2373
2374 case opt_uidlist:
2375 uidlist = *((uid_t **)value);
2376 if (!no_labels) printf("%s =", name);
2377 if (uidlist != NULL)
2378 {
2379 int i;
2380 uschar sep = ' ';
2381 if (no_labels) sep = '\0';
2382 for (i = 1; i <= (int)(uidlist[0]); i++)
2383 {
2384 uschar *name = NULL;
2385 pw = getpwuid(uidlist[i]);
2386 if (pw != NULL) name = US pw->pw_name;
2387 if (sep != '\0') printf("%c", sep);
2388 if (name != NULL) printf("%s", name);
2389 else printf("%ld", (long int)(uidlist[i]));
2390 sep = ':';
2391 }
2392 }
2393 printf("\n");
2394 break;
2395
2396 case opt_gidlist:
2397 gidlist = *((gid_t **)value);
2398 if (!no_labels) printf("%s =", name);
2399 if (gidlist != NULL)
2400 {
2401 int i;
2402 uschar sep = ' ';
2403 if (no_labels) sep = '\0';
2404 for (i = 1; i <= (int)(gidlist[0]); i++)
2405 {
2406 uschar *name = NULL;
2407 gr = getgrgid(gidlist[i]);
2408 if (gr != NULL) name = US gr->gr_name;
2409 if (sep != '\0') printf("%c", sep);
2410 if (name != NULL) printf("%s", name);
2411 else printf("%ld", (long int)(gidlist[i]));
2412 sep = ':';
2413 }
2414 }
2415 printf("\n");
2416 break;
2417
2418 case opt_time:
2419 if (!no_labels) printf("%s = ", name);
2420 printf("%s\n", readconf_printtime(*((int *)value)));
2421 break;
2422
2423 case opt_timelist:
2424 {
2425 int i;
2426 int *list = (int *)value;
2427 if (!no_labels) printf("%s = ", name);
2428 for (i = 0; i < list[1]; i++)
2429 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2430 printf("\n");
2431 }
2432 break;
2433
2434 case opt_bit:
2435 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2436 "" : "no_", name);
2437 break;
2438
2439 case opt_expand_bool:
2440 sprintf(CS name2, "*expand_%.50s", name);
2441 ol2 = find_option(name2, oltop, last);
2442 if (ol2 != NULL && ol2->value != NULL)
2443 {
2444 void *value2 = ol2->value;
2445 if (options_block != NULL)
2446 value2 = (void *)((uschar *)options_block + (long int)value2);
2447 s = *((uschar **)value2);
2448 if (s != NULL)
2449 {
2450 if (!no_labels) printf("%s = ", name);
2451 printf("%s\n", string_printing(s));
2452 break;
2453 }
2454 /* s == NULL => string not set; fall through */
2455 }
2456
2457 /* Fall through */
2458
2459 case opt_bool:
2460 case opt_bool_verify:
2461 case opt_bool_set:
2462 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2463 break;
2464 }
2465 }
2466
2467
2468
2469 /*************************************************
2470 * Print value from main configuration *
2471 *************************************************/
2472
2473 /* This function, called as a result of encountering the -bP option,
2474 causes the value of any main configuration variable to be output if the
2475 second argument is NULL. There are some special values:
2476
2477 all print all main configuration options
2478 configure_file print the name of the configuration file
2479 routers print the routers' configurations
2480 transports print the transports' configuration
2481 authenticators print the authenticators' configuration
2482 macros print the macros' configuration
2483 router_list print a list of router names
2484 transport_list print a list of transport names
2485 authenticator_list print a list of authentication mechanism names
2486 macro_list print a list of macro names
2487 +name print a named list item
2488 local_scan print the local_scan options
2489
2490 If the second argument is not NULL, it must be one of "router", "transport",
2491 "authenticator" or "macro" in which case the first argument identifies the
2492 driver whose options are to be printed.
2493
2494 Arguments:
2495 name option name if type == NULL; else driver name
2496 type NULL or driver type name, as described above
2497 no_labels avoid the "foo = " at the start of an item
2498
2499 Returns: nothing
2500 */
2501
2502 void
2503 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2504 {
2505 BOOL names_only = FALSE;
2506 optionlist *ol;
2507 optionlist *ol2 = NULL;
2508 driver_instance *d = NULL;
2509 macro_item *m;
2510 int size = 0;
2511
2512 if (type == NULL)
2513 {
2514 if (*name == '+')
2515 {
2516 int i;
2517 tree_node *t;
2518 BOOL found = FALSE;
2519 static uschar *types[] = { US"address", US"domain", US"host",
2520 US"localpart" };
2521 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2522 &hostlist_anchor, &localpartlist_anchor };
2523
2524 for (i = 0; i < 4; i++)
2525 {
2526 t = tree_search(*(anchors[i]), name+1);
2527 if (t != NULL)
2528 {
2529 found = TRUE;
2530 if (no_labels)
2531 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2532 else
2533 printf("%slist %s = %s\n", types[i], name+1,
2534 ((namedlist_block *)(t->data.ptr))->string);
2535 }
2536 }
2537
2538 if (!found)
2539 printf("no address, domain, host, or local part list called \"%s\" "
2540 "exists\n", name+1);
2541
2542 return;
2543 }
2544
2545 if (Ustrcmp(name, "configure_file") == 0)
2546 {
2547 printf("%s\n", CS config_main_filename);
2548 return;
2549 }
2550
2551 if (Ustrcmp(name, "all") == 0)
2552 {
2553 for (ol = optionlist_config;
2554 ol < optionlist_config + optionlist_config_size; ol++)
2555 {
2556 if ((ol->type & opt_hidden) == 0)
2557 print_ol(ol, US ol->name, NULL,
2558 optionlist_config, optionlist_config_size,
2559 no_labels);
2560 }
2561 return;
2562 }
2563
2564 if (Ustrcmp(name, "local_scan") == 0)
2565 {
2566 #ifndef LOCAL_SCAN_HAS_OPTIONS
2567 printf("local_scan() options are not supported\n");
2568 #else
2569 for (ol = local_scan_options;
2570 ol < local_scan_options + local_scan_options_count; ol++)
2571 {
2572 print_ol(ol, US ol->name, NULL, local_scan_options,
2573 local_scan_options_count, no_labels);
2574 }
2575 #endif
2576 return;
2577 }
2578
2579 if (Ustrcmp(name, "routers") == 0)
2580 {
2581 type = US"router";
2582 name = NULL;
2583 }
2584 else if (Ustrcmp(name, "transports") == 0)
2585 {
2586 type = US"transport";
2587 name = NULL;
2588 }
2589
2590 else if (Ustrcmp(name, "authenticators") == 0)
2591 {
2592 type = US"authenticator";
2593 name = NULL;
2594 }
2595
2596 else if (Ustrcmp(name, "macros") == 0)
2597 {
2598 type = US"macro";
2599 name = NULL;
2600 }
2601
2602 else if (Ustrcmp(name, "router_list") == 0)
2603 {
2604 type = US"router";
2605 name = NULL;
2606 names_only = TRUE;
2607 }
2608
2609 else if (Ustrcmp(name, "transport_list") == 0)
2610 {
2611 type = US"transport";
2612 name = NULL;
2613 names_only = TRUE;
2614 }
2615
2616 else if (Ustrcmp(name, "authenticator_list") == 0)
2617 {
2618 type = US"authenticator";
2619 name = NULL;
2620 names_only = TRUE;
2621 }
2622
2623 else if (Ustrcmp(name, "macro_list") == 0)
2624 {
2625 type = US"macro";
2626 name = NULL;
2627 names_only = TRUE;
2628 }
2629
2630 else
2631 {
2632 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2633 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2634 return;
2635 }
2636 }
2637
2638 /* Handle the options for a router or transport. Skip options that are flagged
2639 as hidden. Some of these are options with names starting with '*', used for
2640 internal alternative representations of other options (which the printing
2641 function will sort out). Others are synonyms kept for backward compatibility.
2642 */
2643
2644 if (Ustrcmp(type, "router") == 0)
2645 {
2646 d = (driver_instance *)routers;
2647 ol2 = optionlist_routers;
2648 size = optionlist_routers_size;
2649 }
2650 else if (Ustrcmp(type, "transport") == 0)
2651 {
2652 d = (driver_instance *)transports;
2653 ol2 = optionlist_transports;
2654 size = optionlist_transports_size;
2655 }
2656 else if (Ustrcmp(type, "authenticator") == 0)
2657 {
2658 d = (driver_instance *)auths;
2659 ol2 = optionlist_auths;
2660 size = optionlist_auths_size;
2661 }
2662
2663 else if (Ustrcmp(type, "macro") == 0)
2664 {
2665 /* People store passwords in macros and they were previously not available
2666 for printing. So we have an admin_users restriction. */
2667 if (!admin_user)
2668 {
2669 fprintf(stderr, "exim: permission denied\n");
2670 exit(EXIT_FAILURE);
2671 }
2672 for (m = macros; m != NULL; m = m->next)
2673 {
2674 if (name == NULL || Ustrcmp(name, m->name) == 0)
2675 {
2676 if (names_only)
2677 printf("%s\n", CS m->name);
2678 else
2679 printf("%s=%s\n", CS m->name, CS m->replacement);
2680 if (name != NULL)
2681 return;
2682 }
2683 }
2684 if (name != NULL)
2685 printf("%s %s not found\n", type, name);
2686 return;
2687 }
2688
2689 if (names_only)
2690 {
2691 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2692 return;
2693 }
2694
2695 /* Either search for a given driver, or print all of them */
2696
2697 for (; d != NULL; d = d->next)
2698 {
2699 if (name == NULL)
2700 printf("\n%s %s:\n", d->name, type);
2701 else if (Ustrcmp(d->name, name) != 0) continue;
2702
2703 for (ol = ol2; ol < ol2 + size; ol++)
2704 {
2705 if ((ol->type & opt_hidden) == 0)
2706 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2707 }
2708
2709 for (ol = d->info->options;
2710 ol < d->info->options + *(d->info->options_count); ol++)
2711 {
2712 if ((ol->type & opt_hidden) == 0)
2713 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2714 }
2715 if (name != NULL) return;
2716 }
2717 if (name != NULL) printf("%s %s not found\n", type, name);
2718 }
2719
2720
2721
2722 /*************************************************
2723 * Read a named list item *
2724 *************************************************/
2725
2726 /* This function reads a name and a list (i.e. string). The name is used to
2727 save the list in a tree, sorted by its name. Each entry also has a number,
2728 which can be used for caching tests, but if the string contains any expansion
2729 items other than $key, the number is set negative to inhibit caching. This
2730 mechanism is used for domain, host, and address lists that are referenced by
2731 the "+name" syntax.
2732
2733 Arguments:
2734 anchorp points to the tree anchor
2735 numberp points to the current number for this tree
2736 max the maximum number permitted
2737 s the text of the option line, starting immediately after the name
2738 of the list type
2739 tname the name of the list type, for messages
2740
2741 Returns: nothing
2742 */
2743
2744 static void
2745 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2746 uschar *tname)
2747 {
2748 BOOL forcecache = FALSE;
2749 uschar *ss;
2750 tree_node *t;
2751 namedlist_block *nb = store_get(sizeof(namedlist_block));
2752
2753 if (Ustrncmp(s, "_cache", 6) == 0)
2754 {
2755 forcecache = TRUE;
2756 s += 6;
2757 }
2758
2759 if (!isspace(*s))
2760 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2761
2762 if (*numberp >= max)
2763 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2764 tname, max);
2765
2766 while (isspace(*s)) s++;
2767 ss = s;
2768 while (isalnum(*s) || *s == '_') s++;
2769 t = store_get(sizeof(tree_node) + s-ss);
2770 Ustrncpy(t->name, ss, s-ss);
2771 t->name[s-ss] = 0;
2772 while (isspace(*s)) s++;
2773
2774 if (!tree_insertnode(anchorp, t))
2775 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2776 "duplicate name \"%s\" for a named %s", t->name, tname);
2777
2778 t->data.ptr = nb;
2779 nb->number = *numberp;
2780 *numberp += 1;
2781
2782 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2783 "missing '=' after \"%s\"", t->name);
2784 while (isspace(*s)) s++;
2785 nb->string = read_string(s, t->name);
2786 nb->cache_data = NULL;
2787
2788 /* Check the string for any expansions; if any are found, mark this list
2789 uncacheable unless the user has explicited forced caching. */
2790
2791 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2792 }
2793
2794
2795
2796
2797 /*************************************************
2798 * Unpick data for a rate limit *
2799 *************************************************/
2800
2801 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2802 separate values.
2803
2804 Arguments:
2805 s string, in the form t,b,f,l
2806 where t is the threshold (integer)
2807 b is the initial delay (time)
2808 f is the multiplicative factor (fixed point)
2809 k is the maximum time (time)
2810 threshold where to store threshold
2811 base where to store base in milliseconds
2812 factor where to store factor in milliseconds
2813 limit where to store limit
2814
2815 Returns: nothing (panics on error)
2816 */
2817
2818 static void
2819 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2820 int *limit)
2821 {
2822 uschar bstring[16], lstring[16];
2823
2824 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2825 factor, lstring) == 4)
2826 {
2827 *base = readconf_readtime(bstring, 0, TRUE);
2828 *limit = readconf_readtime(lstring, 0, TRUE);
2829 if (*base >= 0 && *limit >= 0) return;
2830 }
2831 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2832 }
2833
2834
2835
2836
2837 /*************************************************
2838 * Drop privs for checking TLS config *
2839 *************************************************/
2840
2841 /* We want to validate TLS options during readconf, but do not want to be
2842 root when we call into the TLS library, in case of library linkage errors
2843 which cause segfaults; before this check, those were always done as the Exim
2844 runtime user and it makes sense to continue with that.
2845
2846 Assumes: tls_require_ciphers has been set, if it will be
2847 exim_user has been set, if it will be
2848 exim_group has been set, if it will be
2849
2850 Returns: bool for "okay"; false will cause caller to immediately exit.
2851 */
2852
2853 #ifdef SUPPORT_TLS
2854 static BOOL
2855 tls_dropprivs_validate_require_cipher(void)
2856 {
2857 const uschar *errmsg;
2858 pid_t pid;
2859 int rc, status;
2860 void (*oldsignal)(int);
2861
2862 oldsignal = signal(SIGCHLD, SIG_DFL);
2863
2864 fflush(NULL);
2865 if ((pid = fork()) < 0)
2866 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2867
2868 if (pid == 0)
2869 {
2870 /* in some modes, will have dropped privilege already */
2871 if (!geteuid())
2872 exim_setugid(exim_uid, exim_gid, FALSE,
2873 US"calling tls_validate_require_cipher");
2874
2875 errmsg = tls_validate_require_cipher();
2876 if (errmsg)
2877 {
2878 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2879 "tls_require_ciphers invalid: %s", errmsg);
2880 }
2881 fflush(NULL);
2882 _exit(0);
2883 }
2884
2885 do {
2886 rc = waitpid(pid, &status, 0);
2887 } while (rc < 0 && errno == EINTR);
2888
2889 DEBUG(D_tls)
2890 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2891 (int)pid, status);
2892
2893 signal(SIGCHLD, oldsignal);
2894
2895 return status == 0;
2896 }
2897 #endif /* SUPPORT_TLS */
2898
2899
2900
2901
2902 /*************************************************
2903 * Read main configuration options *
2904 *************************************************/
2905
2906 /* This function is the first to be called for configuration reading. It
2907 opens the configuration file and reads general configuration settings until
2908 it reaches the end of the configuration section. The file is then left open so
2909 that the remaining configuration data can subsequently be read if needed for
2910 this run of Exim.
2911
2912 The configuration file must be owned either by root or exim, and be writeable
2913 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2914 in the config file, so the test is done on the compiled in values. A slight
2915 anomaly, to be carefully documented.
2916
2917 The name of the configuration file is taken from a list that is included in the
2918 binary of Exim. It can be altered from the command line, but if that is done,
2919 root privilege is immediately withdrawn unless the caller is root or exim.
2920 The first file on the list that exists is used.
2921
2922 For use on multiple systems that share file systems, first look for a
2923 configuration file whose name has the current node name on the end. If that is
2924 not found, try the generic name. For really contorted configurations, that run
2925 multiple Exims with different uid settings, first try adding the effective uid
2926 before the node name. These complications are going to waste resources on most
2927 systems. Therefore they are available only when requested by compile-time
2928 options. */
2929
2930 void
2931 readconf_main(void)
2932 {
2933 int sep = 0;
2934 struct stat statbuf;
2935 uschar *s, *filename;
2936 uschar *list = config_main_filelist;
2937
2938 /* Loop through the possible file names */
2939
2940 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2941 != NULL)
2942 {
2943 /* Cut out all the fancy processing unless specifically wanted */
2944
2945 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2946 uschar *suffix = filename + Ustrlen(filename);
2947
2948 /* Try for the node-specific file if a node name exists */
2949
2950 #ifdef CONFIGURE_FILE_USE_NODE
2951 struct utsname uts;
2952 if (uname(&uts) >= 0)
2953 {
2954 #ifdef CONFIGURE_FILE_USE_EUID
2955 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2956 config_file = Ufopen(filename, "rb");
2957 if (config_file == NULL)
2958 #endif /* CONFIGURE_FILE_USE_EUID */
2959 {
2960 sprintf(CS suffix, ".%.256s", uts.nodename);
2961 config_file = Ufopen(filename, "rb");
2962 }
2963 }
2964 #endif /* CONFIGURE_FILE_USE_NODE */
2965
2966 /* Otherwise, try the generic name, possibly with the euid added */
2967
2968 #ifdef CONFIGURE_FILE_USE_EUID
2969 if (config_file == NULL)
2970 {
2971 sprintf(CS suffix, ".%ld", (long int)original_euid);
2972 config_file = Ufopen(filename, "rb");
2973 }
2974 #endif /* CONFIGURE_FILE_USE_EUID */
2975
2976 /* Finally, try the unadorned name */
2977
2978 if (config_file == NULL)
2979 {
2980 *suffix = 0;
2981 config_file = Ufopen(filename, "rb");
2982 }
2983 #else /* if neither defined */
2984
2985 /* This is the common case when the fancy processing is not included. */
2986
2987 config_file = Ufopen(filename, "rb");
2988 #endif
2989
2990 /* If the file does not exist, continue to try any others. For any other
2991 error, break out (and die). */
2992
2993 if (config_file != NULL || errno != ENOENT) break;
2994 }
2995
2996 /* On success, save the name for verification; config_filename is used when
2997 logging configuration errors (it changes for .included files) whereas
2998 config_main_filename is the name shown by -bP. Failure to open a configuration
2999 file is a serious disaster. */
3000
3001 if (config_file != NULL)
3002 {
3003 config_filename = config_main_filename = string_copy(filename);
3004 }
3005 else
3006 {
3007 if (filename == NULL)
3008 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3009 "%s", config_main_filelist);
3010 else
3011 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3012 "configuration file %s", filename));
3013 }
3014
3015 /* Check the status of the file we have opened, if we have retained root
3016 privileges and the file isn't /dev/null (which *should* be 0666). */
3017
3018 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3019 {
3020 if (fstat(fileno(config_file), &statbuf) != 0)
3021 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3022 big_buffer);
3023
3024 if ((statbuf.st_uid != root_uid /* owner not root */
3025 #ifdef CONFIGURE_OWNER
3026 && statbuf.st_uid != config_uid /* owner not the special one */
3027 #endif
3028 ) || /* or */
3029 (statbuf.st_gid != root_gid /* group not root & */
3030 #ifdef CONFIGURE_GROUP
3031 && statbuf.st_gid != config_gid /* group not the special one */
3032 #endif
3033 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3034 /* or */
3035 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3036
3037 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3038 "wrong owner, group, or mode", big_buffer);
3039 }
3040
3041 /* Process the main configuration settings. They all begin with a lower case
3042 letter. If we see something starting with an upper case letter, it is taken as
3043 a macro definition. */
3044
3045 while ((s = get_config_line()) != NULL)
3046 {
3047 if (isupper(s[0])) read_macro_assignment(s);
3048
3049 else if (Ustrncmp(s, "domainlist", 10) == 0)
3050 read_named_list(&domainlist_anchor, &domainlist_count,
3051 MAX_NAMED_LIST, s+10, US"domain list");
3052
3053 else if (Ustrncmp(s, "hostlist", 8) == 0)
3054 read_named_list(&hostlist_anchor, &hostlist_count,
3055 MAX_NAMED_LIST, s+8, US"host list");
3056
3057 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3058 read_named_list(&addresslist_anchor, &addresslist_count,
3059 MAX_NAMED_LIST, s+11, US"address list");
3060
3061 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3062 read_named_list(&localpartlist_anchor, &localpartlist_count,
3063 MAX_NAMED_LIST, s+13, US"local part list");
3064
3065 else
3066 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3067 NULL, US"main option \"%s\" unknown");
3068 }
3069
3070
3071 /* If local_sender_retain is set, local_from_check must be unset. */
3072
3073 if (local_sender_retain && local_from_check)
3074 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3075 "local_sender_retain are set; this combination is not allowed");
3076
3077 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3078 wanted. */
3079
3080 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3081
3082 /* The max retry interval must not be greater than 24 hours. */
3083
3084 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3085
3086 /* remote_max_parallel must be > 0 */
3087
3088 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3089
3090 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3091 start of a new SMTP message. */
3092
3093 freeze_tell_config = freeze_tell;
3094
3095 /* The primary host name may be required for expansion of spool_directory
3096 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3097 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3098 canonize it. Some people like upper case letters in their host names, so we
3099 don't force the case. */
3100
3101 if (primary_hostname == NULL)
3102 {
3103 uschar *hostname;
3104 struct utsname uts;
3105 if (uname(&uts) < 0)
3106 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3107 hostname = US uts.nodename;
3108
3109 if (Ustrchr(hostname, '.') == NULL)
3110 {
3111 int af = AF_INET;
3112 struct hostent *hostdata;
3113
3114 #if HAVE_IPV6
3115 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3116 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
3117 TRUE, NULL) != OK))
3118 af = AF_INET6;
3119 #else
3120 af = AF_INET;
3121 #endif
3122
3123 for (;;)
3124 {
3125 #if HAVE_IPV6
3126 #if HAVE_GETIPNODEBYNAME
3127 int error_num;
3128 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3129 #else
3130 hostdata = gethostbyname2(CS hostname, af);
3131 #endif
3132 #else
3133 hostdata = gethostbyname(CS hostname);
3134 #endif
3135
3136 if (hostdata != NULL)
3137 {
3138 hostname = US hostdata->h_name;
3139 break;
3140 }
3141
3142 if (af == AF_INET) break;
3143 af = AF_INET;
3144 }
3145 }
3146
3147 primary_hostname = string_copy(hostname);
3148 }
3149
3150 /* Set up default value for smtp_active_hostname */
3151
3152 smtp_active_hostname = primary_hostname;
3153
3154 /* If spool_directory wasn't set in the build-time configuration, it must have
3155 got set above. Of course, writing to the log may not work if log_file_path is
3156 not set, but it will at least get to syslog or somewhere, with any luck. */
3157
3158 if (*spool_directory == 0)
3159 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3160 "proceed");
3161
3162 /* Expand the spool directory name; it may, for example, contain the primary
3163 host name. Same comment about failure. */
3164
3165 s = expand_string(spool_directory);
3166 if (s == NULL)
3167 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3168 "\"%s\": %s", spool_directory, expand_string_message);
3169 spool_directory = s;
3170
3171 /* Expand log_file_path, which must contain "%s" in any component that isn't
3172 the null string or "syslog". It is also allowed to contain one instance of %D
3173 or %M. However, it must NOT contain % followed by anything else. */
3174
3175 if (*log_file_path != 0)
3176 {
3177 uschar *ss, *sss;
3178 int sep = ':'; /* Fixed for log file path */
3179 s = expand_string(log_file_path);
3180 if (s == NULL)
3181 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3182 "\"%s\": %s", log_file_path, expand_string_message);
3183
3184 ss = s;
3185 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3186 {
3187 uschar *t;
3188 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3189 t = Ustrstr(sss, "%s");
3190 if (t == NULL)
3191 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3192 "contain \"%%s\"", sss);
3193 *t = 'X';
3194 t = Ustrchr(sss, '%');
3195 if (t != NULL)
3196 {
3197 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3198 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3199 "unexpected \"%%\" character", s);
3200 }
3201 }
3202
3203 log_file_path = s;
3204 }
3205
3206 /* Interpret syslog_facility into an integer argument for 'ident' param to
3207 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3208 leading "log_". */
3209
3210 if (syslog_facility_str != NULL)
3211 {
3212 int i;
3213 uschar *s = syslog_facility_str;
3214
3215 if ((Ustrlen(syslog_facility_str) >= 4) &&
3216 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3217 s += 4;
3218
3219 for (i = 0; i < syslog_list_size; i++)
3220 {
3221 if (strcmpic(s, syslog_list[i].name) == 0)
3222 {
3223 syslog_facility = syslog_list[i].value;
3224 break;
3225 }
3226 }
3227
3228 if (i >= syslog_list_size)
3229 {
3230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3231 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3232 }
3233 }
3234
3235 /* Expand pid_file_path */
3236
3237 if (*pid_file_path != 0)
3238 {
3239 s = expand_string(pid_file_path);
3240 if (s == NULL)
3241 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3242 "\"%s\": %s", pid_file_path, expand_string_message);
3243 pid_file_path = s;
3244 }
3245
3246 /* Set default value of process_log_path */
3247
3248 if (process_log_path == NULL || *process_log_path =='\0')
3249 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3250
3251 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3252 message. */
3253
3254 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3255
3256 /* Unpick the SMTP rate limiting options, if set */
3257
3258 if (smtp_ratelimit_mail != NULL)
3259 {
3260 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3261 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3262 }
3263
3264 if (smtp_ratelimit_rcpt != NULL)
3265 {
3266 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3267 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3268 }
3269
3270 /* The qualify domains default to the primary host name */
3271
3272 if (qualify_domain_sender == NULL)
3273 qualify_domain_sender = primary_hostname;
3274 if (qualify_domain_recipient == NULL)
3275 qualify_domain_recipient = qualify_domain_sender;
3276
3277 /* Setting system_filter_user in the configuration sets the gid as well if a
3278 name is given, but a numerical value does not. */
3279
3280 if (system_filter_uid_set && !system_filter_gid_set)
3281 {
3282 struct passwd *pw = getpwuid(system_filter_uid);
3283 if (pw == NULL)
3284 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3285 (long int)system_filter_uid);
3286 system_filter_gid = pw->pw_gid;
3287 system_filter_gid_set = TRUE;
3288 }
3289
3290 /* If the errors_reply_to field is set, check that it is syntactically valid
3291 and ensure it contains a domain. */
3292
3293 if (errors_reply_to != NULL)
3294 {
3295 uschar *errmess;
3296 int start, end, domain;
3297 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3298 &start, &end, &domain, FALSE);
3299
3300 if (recipient == NULL)
3301 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3302 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3303
3304 if (domain == 0)
3305 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3306 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3307 }
3308
3309 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3310 smtp_accept_max must also be set. */
3311
3312 if (smtp_accept_max == 0 &&
3313 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3314 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3315 "smtp_accept_max must be set if smtp_accept_queue or "
3316 "smtp_accept_max_per_host is set");
3317
3318 /* Set up the host number if anything is specified. It is an expanded string
3319 so that it can be computed from the host name, for example. We do this last
3320 so as to ensure that everything else is set up before the expansion. */
3321
3322 if (host_number_string != NULL)
3323 {
3324 long int n;
3325 uschar *end;
3326 uschar *s = expand_string(host_number_string);
3327 if (s == NULL)
3328 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3329 "failed to expand localhost_number \"%s\": %s",
3330 host_number_string, expand_string_message);
3331 n = Ustrtol(s, &end, 0);
3332 while (isspace(*end)) end++;
3333 if (*end != 0)
3334 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3335 "localhost_number value is not a number: %s", s);
3336 if (n > LOCALHOST_MAX)
3337 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3338 "localhost_number is greater than the maximum allowed value (%d)",
3339 LOCALHOST_MAX);
3340 host_number = n;
3341 }
3342
3343 #ifdef SUPPORT_TLS
3344 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3345
3346 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3347 tls_verify_certificates == NULL)
3348 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3349 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3350 (tls_verify_hosts != NULL)? "" : "try_");
3351
3352 /* This also checks that the library linkage is working and we can call
3353 routines in it, so call even if tls_require_ciphers is unset */
3354 if (!tls_dropprivs_validate_require_cipher())
3355 exit(1);
3356
3357 /* Magic number: at time of writing, 1024 has been the long-standing value
3358 used by so many clients, and what Exim used to use always, that it makes
3359 sense to just min-clamp this max-clamp at that. */
3360 if (tls_dh_max_bits < 1024)
3361 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3362 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3363
3364 /* If openssl_options is set, validate it */
3365 if (openssl_options != NULL)
3366 {
3367 # ifdef USE_GNUTLS
3368 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3369 "openssl_options is set but we're using GnuTLS");
3370 # else
3371 long dummy;
3372 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3373 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3374 "openssl_options parse error: %s", openssl_options);
3375 # endif
3376 }
3377
3378 if (gnutls_require_kx || gnutls_require_mac || gnutls_require_proto)
3379 log_write(0, LOG_MAIN, "WARNING: main options"
3380 " gnutls_require_kx, gnutls_require_mac and gnutls_require_protocols"
3381 " are obsolete\n");
3382 #endif /*SUPPORT_TLS*/
3383 }
3384
3385
3386
3387 /*************************************************
3388 * Initialize one driver *
3389 *************************************************/
3390
3391 /* This is called once the driver's generic options, if any, have been read.
3392 We can now find the driver, set up defaults for the private options, and
3393 unset any "set" bits in the private options table (which might have been
3394 set by another incarnation of the same driver).
3395
3396 Arguments:
3397 d pointer to driver instance block, with generic
3398 options filled in
3399 drivers_available vector of available drivers
3400 size_of_info size of each block in drivers_available
3401 class class of driver, for error message
3402
3403 Returns: pointer to the driver info block
3404 */
3405
3406 static driver_info *
3407 init_driver(driver_instance *d, driver_info *drivers_available,
3408 int size_of_info, uschar *class)
3409 {
3410 driver_info *dd;
3411
3412 for (dd = drivers_available; dd->driver_name[0] != 0;
3413 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3414 {
3415 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3416 {
3417 int i;
3418 int len = dd->options_len;
3419 d->info = dd;
3420 d->options_block = store_get(len);
3421 memcpy(d->options_block, dd->options_block, len);
3422 for (i = 0; i < *(dd->options_count); i++)
3423 dd->options[i].type &= ~opt_set;
3424 return dd;
3425 }
3426 }
3427
3428 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3429 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3430
3431 return NULL; /* never obeyed */
3432 }
3433
3434
3435
3436
3437 /*************************************************
3438 * Initialize driver list *
3439 *************************************************/
3440
3441 /* This function is called for routers, transports, and authentication
3442 mechanisms. It reads the data from the current point in the configuration file
3443 up to the end of the section, and sets up a chain of instance blocks according
3444 to the file's contents. The file will already have been opened by a call to
3445 readconf_main, and must be left open for subsequent reading of further data.
3446
3447 Any errors cause a panic crash. Note that the blocks with names driver_info and
3448 driver_instance must map the first portions of all the _info and _instance
3449 blocks for this shared code to work.
3450
3451 Arguments:
3452 class "router", "transport", or "authenticator"
3453 anchor &routers, &transports, &auths
3454 drivers_available available drivers
3455 size_of_info size of each info block
3456 instance_default points to default data for an instance
3457 instance_size size of instance block
3458 driver_optionlist generic option list
3459 driver_optionlist_count count of generic option list
3460
3461 Returns: nothing
3462 */
3463
3464 void
3465 readconf_driver_init(
3466 uschar *class,
3467 driver_instance **anchor,
3468 driver_info *drivers_available,
3469 int size_of_info,
3470 void *instance_default,
3471 int instance_size,
3472 optionlist *driver_optionlist,
3473 int driver_optionlist_count)
3474 {
3475 driver_instance **p = anchor;
3476 driver_instance *d = NULL;
3477 uschar *buffer;
3478
3479 while ((buffer = get_config_line()) != NULL)
3480 {
3481 uschar name[64];
3482 uschar *s;
3483
3484 /* Read the first name on the line and test for the start of a new driver. A
3485 macro definition indicates the end of the previous driver. If this isn't the
3486 start of a new driver, the line will be re-read. */
3487
3488 s = readconf_readname(name, sizeof(name), buffer);
3489
3490 /* Handle macro definition, first finishing off the initialization of the
3491 previous driver, if any. */
3492
3493 if (isupper(*name) && *s == '=')
3494 {
3495 if (d != NULL)
3496 {
3497 if (d->driver_name == NULL)
3498 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3499 "no driver defined for %s \"%s\"", class, d->name);
3500 (d->info->init)(d);
3501 d = NULL;
3502 }
3503 read_macro_assignment(buffer);
3504 continue;
3505 }
3506
3507 /* If the line starts with a name terminated by a colon, we are at the
3508 start of the definition of a new driver. The rest of the line must be
3509 blank. */
3510
3511 if (*s++ == ':')
3512 {
3513 int i;
3514
3515 /* Finish off initializing the previous driver. */
3516
3517 if (d != NULL)
3518 {
3519 if (d->driver_name == NULL)
3520 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3521 "no driver defined for %s \"%s\"", class, d->name);
3522 (d->info->init)(d);
3523 }
3524
3525 /* Check that we haven't already got a driver of this name */
3526
3527 for (d = *anchor; d != NULL; d = d->next)
3528 if (Ustrcmp(name, d->name) == 0)
3529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3530 "there are two %ss called \"%s\"", class, name);
3531
3532 /* Set up a new driver instance data block on the chain, with
3533 its default values installed. */
3534
3535 d = store_get(instance_size);
3536 memcpy(d, instance_default, instance_size);
3537 *p = d;
3538 p = &(d->next);
3539 d->name = string_copy(name);
3540
3541 /* Clear out the "set" bits in the generic options */
3542
3543 for (i = 0; i < driver_optionlist_count; i++)
3544 driver_optionlist[i].type &= ~opt_set;
3545
3546 /* Check nothing more on this line, then do the next loop iteration. */
3547
3548 while (isspace(*s)) s++;
3549 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3550 continue;
3551 }
3552
3553 /* Not the start of a new driver. Give an error if we have not set up a
3554 current driver yet. */
3555
3556 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3557 "%s name missing", class);
3558
3559 /* First look to see if this is a generic option; if it is "driver",
3560 initialize the driver. If is it not a generic option, we can look for a
3561 private option provided that the driver has been previously set up. */
3562
3563 if (readconf_handle_option(buffer, driver_optionlist,
3564 driver_optionlist_count, d, NULL))
3565 {
3566 if (d->info == NULL && d->driver_name != NULL)
3567 init_driver(d, drivers_available, size_of_info, class);
3568 }
3569
3570 /* Handle private options - pass the generic block because some may
3571 live therein. A flag with each option indicates if it is in the public
3572 block. */
3573
3574 else if (d->info != NULL)
3575 {
3576 readconf_handle_option(buffer, d->info->options,
3577 *(d->info->options_count), d, US"option \"%s\" unknown");
3578 }
3579
3580 /* The option is not generic and the driver name has not yet been given. */
3581
3582 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3583 "(\"driver\" must be specified before any private options)", name);
3584 }
3585
3586 /* Run the initialization function for the final driver. */
3587
3588 if (d != NULL)
3589 {
3590 if (d->driver_name == NULL)
3591 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3592 "no driver defined for %s \"%s\"", class, d->name);
3593 (d->info->init)(d);
3594 }
3595 }
3596
3597
3598
3599 /*************************************************
3600 * Check driver dependency *
3601 *************************************************/
3602
3603 /* This function is passed a driver instance and a string. It checks whether
3604 any of the string options for the driver contains the given string as an
3605 expansion variable.
3606
3607 Arguments:
3608 d points to a driver instance block
3609 s the string to search for
3610
3611 Returns: TRUE if a dependency is found
3612 */
3613
3614 BOOL
3615 readconf_depends(driver_instance *d, uschar *s)
3616 {
3617 int count = *(d->info->options_count);
3618 optionlist *ol;
3619 uschar *ss;
3620
3621 for (ol = d->info->options; ol < d->info->options + count; ol++)
3622 {
3623 void *options_block;
3624 uschar *value;
3625 int type = ol->type & opt_mask;
3626 if (type != opt_stringptr) continue;
3627 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3628 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3629 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3630 {
3631 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3632 isalnum(ss[Ustrlen(s)])) continue;
3633 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3634 d->name, ol->name, s);
3635 return TRUE;
3636 }
3637 }
3638
3639 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3640 return FALSE;
3641 }
3642
3643
3644
3645
3646 /*************************************************
3647 * Decode an error type for retries *
3648 *************************************************/
3649
3650 /* This function is global because it is also called from the main
3651 program when testing retry information. It decodes strings such as "quota_7d"
3652 into numerical error codes.
3653
3654 Arguments:
3655 pp points to start of text
3656 p points past end of text
3657 basic_errno points to an int to receive the main error number
3658 more_errno points to an int to receive the secondary error data
3659
3660 Returns: NULL if decoded correctly; else points to error text
3661 */
3662
3663 uschar *
3664 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3665 {
3666 int len;
3667 uschar *q = pp;
3668 while (q < p && *q != '_') q++;
3669 len = q - pp;
3670
3671 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3672 {
3673 *basic_errno = ERRNO_EXIMQUOTA;
3674 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3675 return US"bad time value";
3676 }
3677
3678 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3679 {
3680 *basic_errno = ECONNREFUSED;
3681 if (q != p)
3682 {
3683 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3684 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3685 else return US"A or MX expected after \"refused\"";
3686 }
3687 }
3688
3689 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3690 {
3691 *basic_errno = ETIMEDOUT;
3692 if (q != p)
3693 {
3694 int i;
3695 int xlen = p - q - 1;
3696 uschar *x = q + 1;
3697
3698 static uschar *extras[] =
3699 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3700 static int values[] =
3701 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3702
3703 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3704 {
3705 if (strncmpic(x, extras[i], xlen) == 0)
3706 {
3707 *more_errno = values[i];
3708 break;
3709 }
3710 }
3711
3712 if (i >= sizeof(extras)/sizeof(uschar *))
3713 {
3714 if (strncmpic(x, US"DNS", xlen) == 0)
3715 {
3716 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3717 "available in retry rules (it has never worked) - treated as "
3718 "\"timeout\"");
3719 }
3720 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3721 }
3722 }
3723 }
3724
3725 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3726 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3727 strncmpic(pp, US"data_4", 6) == 0)
3728 {
3729 BOOL bad = FALSE;
3730 int x = 255; /* means "any 4xx code" */
3731 if (p != pp + 8) bad = TRUE; else
3732 {
3733 int a = pp[6], b = pp[7];
3734 if (isdigit(a))
3735 {
3736 x = (a - '0') * 10;
3737 if (isdigit(b)) x += b - '0';
3738 else if (b == 'x') x += 100;
3739 else bad = TRUE;
3740 }
3741 else if (a != 'x' || b != 'x') bad = TRUE;
3742 }
3743
3744 if (bad)
3745 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3746 "x is literal and d is any digit", pp);
3747
3748 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3749 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3750 *more_errno = x << 8;
3751 }
3752
3753 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3754 strncmpic(q+1, US"failed", p-q-1) == 0)
3755 *basic_errno = ERRNO_AUTHFAIL;
3756
3757 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3758 *basic_errno = ERRNO_SMTPCLOSED;
3759
3760 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3761 *basic_errno = ERRNO_TLSREQUIRED;
3762
3763 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3764 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3765
3766 return NULL;
3767 }
3768
3769
3770
3771
3772 /*************************************************
3773 * Read retry information *
3774 *************************************************/
3775
3776 /* Each line of retry information contains:
3777
3778 . A domain name pattern or an address pattern;
3779
3780 . An error name, possibly with additional data, or *;
3781
3782 . An optional sequence of retry items, each consisting of an identifying
3783 letter, a cutoff time, and optional parameters.
3784
3785 All this is decoded and placed into a control block. */
3786
3787
3788 /* Subroutine to read an argument, preceded by a comma and terminated
3789 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3790 1 = fixed point number (returned *1000).
3791
3792 Arguments:
3793 paddr pointer to pointer to current character; updated
3794 type 0 => read a time; 1 => read a fixed point number
3795
3796 Returns: time in seconds or fixed point number * 1000
3797 */
3798
3799 static int
3800 retry_arg(uschar **paddr, int type)
3801 {
3802 uschar *p = *paddr;
3803 uschar *pp;
3804
3805 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3806
3807 while (isspace(*p)) p++;
3808 pp = p;
3809 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3810
3811 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3812 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3813
3814 *paddr = p;
3815 switch (type)
3816 {
3817 case 0:
3818 return readconf_readtime(pp, *p, FALSE);
3819 case 1:
3820 return readconf_readfixed(pp, *p);
3821 }
3822 return 0; /* Keep picky compilers happy */
3823 }
3824
3825 /* The function proper */
3826
3827 void
3828 readconf_retries(void)
3829 {
3830 retry_config **chain = &retries;
3831 retry_config *next;
3832 uschar *p;
3833
3834 while ((p = get_config_line()) != NULL)
3835 {
3836 retry_rule **rchain;
3837 uschar *pp, *error;
3838
3839 next = store_get(sizeof(retry_config));
3840 next->next = NULL;
3841 *chain = next;
3842 chain = &(next->next);
3843 next->basic_errno = next->more_errno = 0;
3844 next->senders = NULL;
3845 next->rules = NULL;
3846 rchain = &(next->rules);
3847
3848 next->pattern = string_dequote(&p);
3849 while (isspace(*p)) p++;
3850 pp = p;
3851 while (mac_isgraph(*p)) p++;
3852 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3853 "missing error type in retry rule");
3854
3855 /* Test error names for things we understand. */
3856
3857 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3858 &(next->more_errno))) != NULL)
3859 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3860
3861 /* There may be an optional address list of senders to be used as another
3862 constraint on the rule. This was added later, so the syntax is a bit of a
3863 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3864 an address list. */
3865
3866 while (isspace(*p)) p++;
3867 if (Ustrncmp(p, "senders", 7) == 0)
3868 {
3869 p += 7;
3870 while (isspace(*p)) p++;
3871 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3872 "\"=\" expected after \"senders\" in retry rule");
3873 while (isspace(*p)) p++;
3874 next->senders = string_dequote(&p);
3875 }
3876
3877 /* Now the retry rules. Keep the maximum timeout encountered. */
3878
3879 while (isspace(*p)) p++;
3880
3881 while (*p != 0)
3882 {
3883 retry_rule *rule = store_get(sizeof(retry_rule));
3884 *rchain = rule;
3885 rchain = &(rule->next);
3886 rule->next = NULL;
3887 rule->rule = toupper(*p++);
3888 rule->timeout = retry_arg(&p, 0);
3889 if (rule->timeout > retry_maximum_timeout)
3890 retry_maximum_timeout = rule->timeout;
3891
3892 switch (rule->rule)
3893 {
3894 case 'F': /* Fixed interval */
3895 rule->p1 = retry_arg(&p, 0);
3896 break;
3897
3898 case 'G': /* Geometrically increasing intervals */
3899 case 'H': /* Ditto, but with randomness */
3900 rule->p1 = retry_arg(&p, 0);
3901 rule->p2 = retry_arg(&p, 1);
3902 break;
3903
3904 default:
3905 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3906 break;
3907 }
3908
3909 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3910 (rule->rule != 'F' && rule->p2 < 1000))
3911 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3912 "bad parameters for retry rule");
3913
3914 while (isspace(*p)) p++;
3915 if (*p == ';')
3916 {
3917 p++;
3918 while (isspace(*p)) p++;
3919 }
3920 else if (*p != 0)
3921 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3922 }
3923 }
3924 }
3925
3926
3927
3928 /*************************************************
3929 * Initialize authenticators *
3930 *************************************************/
3931
3932 /* Read the authenticators section of the configuration file.
3933
3934 Arguments: none
3935 Returns: nothing
3936 */
3937
3938 static void
3939 auths_init(void)
3940 {
3941 auth_instance *au, *bu;
3942 readconf_driver_init(US"authenticator",
3943 (driver_instance **)(&auths), /* chain anchor */
3944 (driver_info *)auths_available, /* available drivers */
3945 sizeof(auth_info), /* size of info block */
3946 &auth_defaults, /* default values for generic options */
3947 sizeof(auth_instance), /* size of instance block */
3948 optionlist_auths, /* generic options */
3949 optionlist_auths_size);
3950
3951 for (au = auths; au != NULL; au = au->next)
3952 {
3953 if (au->public_name == NULL)
3954 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3955 "the %s authenticator", au->name);
3956 for (bu = au->next; bu != NULL; bu = bu->next)
3957 {
3958 if (strcmpic(au->public_name, bu->public_name) == 0)
3959 {
3960 if ((au->client && bu->client) || (au->server && bu->server))
3961 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3962 "(%s and %s) have the same public name (%s)",
3963 (au->client)? US"client" : US"server", au->name, bu->name,
3964 au->public_name);
3965 }
3966 }
3967 }
3968 }
3969
3970
3971
3972
3973 /*************************************************
3974 * Read ACL information *
3975 *************************************************/
3976
3977 /* If this run of Exim is not doing something that involves receiving a
3978 message, we can just skip over the ACL information. No need to parse it.
3979
3980 First, we have a function for acl_read() to call back to get the next line. We
3981 need to remember the line we passed, because at the end it will contain the
3982 name of the next ACL. */
3983
3984 static uschar *acl_line;
3985
3986 static uschar *
3987 acl_callback(void)
3988 {
3989 acl_line = get_config_line();
3990 return acl_line;
3991 }
3992
3993
3994 /* Now the main function:
3995
3996 Arguments: none
3997 Returns: nothing
3998 */
3999
4000 static void
4001 readconf_acl(void)
4002 {
4003 uschar *p;
4004
4005 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4006 between ACLs. */
4007
4008 acl_line = get_config_line();
4009
4010 while(acl_line != NULL)
4011 {
4012 uschar name[64];
4013 tree_node *node;
4014 uschar *error;
4015
4016 p = readconf_readname(name, sizeof(name), acl_line);
4017 if (isupper(*name) && *p == '=')
4018 {
4019 read_macro_assignment(acl_line);
4020 acl_line = get_config_line();
4021 continue;
4022 }
4023
4024 if (*p != ':' || name[0] == 0)
4025 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4026
4027 node = store_get(sizeof(tree_node) + Ustrlen(name));
4028 Ustrcpy(node->name, name);
4029 if (!tree_insertnode(&acl_anchor, node))
4030 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4031 "there are two ACLs called \"%s\"", name);
4032
4033 node->data.ptr = acl_read(acl_callback, &error);
4034
4035 if (node->data.ptr == NULL && error != NULL)
4036 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4037 }
4038 }
4039
4040
4041
4042 /*************************************************
4043 * Read configuration for local_scan() *
4044 *************************************************/
4045
4046 /* This function is called after "begin local_scan" is encountered in the
4047 configuration file. If the local_scan() function allows for configuration
4048 options, we can process them. Otherwise, we expire in a panic.
4049
4050 Arguments: none
4051 Returns: nothing
4052 */
4053
4054 static void
4055 local_scan_init(void)
4056 {
4057 #ifndef LOCAL_SCAN_HAS_OPTIONS
4058 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4059 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4060 #else
4061
4062 uschar *p;
4063 while ((p = get_config_line()) != NULL)
4064 {
4065 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4066 NULL, US"local_scan option \"%s\" unknown");
4067 }
4068 #endif
4069 }
4070
4071
4072
4073 /*************************************************
4074 * Read rest of configuration (after main) *
4075 *************************************************/
4076
4077 /* This function reads the rest of the runtime configuration, after the main
4078 configuration. It is called only when actually needed. Each subsequent section
4079 of the configuration starts with a line of the form
4080
4081 begin name
4082
4083 where the name is "routers", "transports", etc. A section is terminated by
4084 hitting the next "begin" line, and the next name is left in next_section.
4085 Because it may confuse people as to whether the names are singular or plural,
4086 we add "s" if it's missing. There is always enough room in next_section for
4087 this. This function is basically just a switch.
4088
4089 Arguments: none
4090 Returns: nothing
4091 */
4092
4093 static uschar *section_list[] = {
4094 US"acls",
4095 US"authenticators",
4096 US"local_scans",
4097 US"retrys",
4098 US"rewrites",
4099 US"routers",
4100 US"transports"};
4101
4102 void
4103 readconf_rest(void)
4104 {
4105 int had = 0;
4106
4107 while(next_section[0] != 0)
4108 {
4109 int bit;
4110 int first = 0;
4111 int last = sizeof(section_list) / sizeof(uschar *);
4112 int mid = last/2;
4113 int n = Ustrlen(next_section);
4114
4115 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4116
4117 for (;;)
4118 {
4119 int c = strcmpic(next_section, section_list[mid]);
4120 if (c == 0) break;
4121 if (c > 0) first = mid + 1; else last = mid;
4122 if (first >= last)
4123 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4124 "\"%.*s\" is not a known configuration section name", n, next_section);
4125 mid = (last + first)/2;
4126 }
4127
4128 bit = 1 << mid;
4129 if (((had ^= bit) & bit) == 0)
4130 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4131 "\"%.*s\" section is repeated in the configuration file", n,
4132 next_section);
4133
4134 switch(mid)
4135 {
4136 case 0: readconf_acl(); break;
4137 case 1: auths_init(); break;
4138 case 2: local_scan_init(); break;
4139 case 3: readconf_retries(); break;
4140 case 4: readconf_rewrites(); break;
4141 case 5: route_init(); break;
4142 case 6: transport_init(); break;
4143 }
4144 }
4145
4146 (void)fclose(config_file);
4147 }
4148
4149 /* vi: aw ai sw=2
4150 */
4151 /* End of readconf.c */
exim4 packaging