Import Upstream version 4.84.2
[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 extern char **environ;
15
16
17 #define CSTATE_STACK_SIZE 10
18
19
20 /* Structure for chain (stack) of .included files */
21
22 typedef struct config_file_item {
23 struct config_file_item *next;
24 uschar *filename;
25 FILE *file;
26 int lineno;
27 } config_file_item;
28
29 /* Structure of table of conditional words and their state transitions */
30
31 typedef struct cond_item {
32 uschar *name;
33 int namelen;
34 int action1;
35 int action2;
36 int pushpop;
37 } cond_item;
38
39 /* Structure of table of syslog facility names and values */
40
41 typedef struct syslog_fac_item {
42 uschar *name;
43 int value;
44 } syslog_fac_item;
45
46
47 /* Static variables */
48
49 static config_file_item *config_file_stack = NULL; /* For includes */
50
51 static uschar *syslog_facility_str = NULL;
52 static uschar next_section[24];
53 static uschar time_buffer[24];
54
55 /* State variables for conditional loading (.ifdef / .else / .endif) */
56
57 static int cstate = 0;
58 static int cstate_stack_ptr = -1;
59 static int cstate_stack[CSTATE_STACK_SIZE];
60
61 /* Table of state transitions for handling conditional inclusions. There are
62 four possible state transitions:
63
64 .ifdef true
65 .ifdef false
66 .elifdef true (or .else)
67 .elifdef false
68
69 .endif just causes the previous cstate to be popped off the stack */
70
71 static int next_cstate[3][4] =
72 {
73 /* State 0: reading from file, or reading until next .else or .endif */
74 { 0, 1, 2, 2 },
75 /* State 1: condition failed, skipping until next .else or .endif */
76 { 2, 2, 0, 1 },
77 /* State 2: skipping until .endif */
78 { 2, 2, 2, 2 },
79 };
80
81 /* Table of conditionals and the states to set. For each name, there are four
82 values: the length of the name (to save computing it each time), the state to
83 set if a macro was found in the line, the state to set if a macro was not found
84 in the line, and a stack manipulation setting which is:
85
86 -1 pull state value off the stack
87 0 don't alter the stack
88 +1 push value onto stack, before setting new state
89 */
90
91 static cond_item cond_list[] = {
92 { US"ifdef", 5, 0, 1, 1 },
93 { US"ifndef", 6, 1, 0, 1 },
94 { US"elifdef", 7, 2, 3, 0 },
95 { US"elifndef", 8, 3, 2, 0 },
96 { US"else", 4, 2, 2, 0 },
97 { US"endif", 5, 0, 0, -1 }
98 };
99
100 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
101
102 /* Table of syslog facility names and their values */
103
104 static syslog_fac_item syslog_list[] = {
105 { US"mail", LOG_MAIL },
106 { US"user", LOG_USER },
107 { US"news", LOG_NEWS },
108 { US"uucp", LOG_UUCP },
109 { US"local0", LOG_LOCAL0 },
110 { US"local1", LOG_LOCAL1 },
111 { US"local2", LOG_LOCAL2 },
112 { US"local3", LOG_LOCAL3 },
113 { US"local4", LOG_LOCAL4 },
114 { US"local5", LOG_LOCAL5 },
115 { US"local6", LOG_LOCAL6 },
116 { US"local7", LOG_LOCAL7 },
117 { US"daemon", LOG_DAEMON }
118 };
119
120 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
121
122
123
124
125 /*************************************************
126 * Main configuration options *
127 *************************************************/
128
129 /* The list of options that can be set in the main configuration file. This
130 must be in alphabetic order because it is searched by binary chop. */
131
132 static optionlist optionlist_config[] = {
133 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
134 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
135 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
136 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
137 { "accept_8bitmime", opt_bool, &accept_8bitmime },
138 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
139 #ifdef WITH_CONTENT_SCAN
140 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
141 #endif
142 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
143 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
144 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
145 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
146 #ifndef DISABLE_PRDR
147 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
148 #endif
149 #ifndef DISABLE_DKIM
150 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
151 #endif
152 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
153 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
154 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
155 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
156 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
157 #ifdef WITH_CONTENT_SCAN
158 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
159 #endif
160 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
161 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
162 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
163 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
164 #ifdef SUPPORT_TLS
165 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
166 #endif
167 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
168 { "add_environment", opt_stringptr, &add_environment },
169 { "admin_groups", opt_gidlist, &admin_groups },
170 { "allow_domain_literals", opt_bool, &allow_domain_literals },
171 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
172 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
173 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
174 { "auto_thaw", opt_time, &auto_thaw },
175 #ifdef WITH_CONTENT_SCAN
176 { "av_scanner", opt_stringptr, &av_scanner },
177 #endif
178 { "bi_command", opt_stringptr, &bi_command },
179 #ifdef EXPERIMENTAL_BRIGHTMAIL
180 { "bmi_config_file", opt_stringptr, &bmi_config_file },
181 #endif
182 { "bounce_message_file", opt_stringptr, &bounce_message_file },
183 { "bounce_message_text", opt_stringptr, &bounce_message_text },
184 { "bounce_return_body", opt_bool, &bounce_return_body },
185 { "bounce_return_message", opt_bool, &bounce_return_message },
186 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
187 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
188 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
189 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
190 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
191 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
192 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
193 { "check_log_inodes", opt_int, &check_log_inodes },
194 { "check_log_space", opt_Kint, &check_log_space },
195 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
196 { "check_spool_inodes", opt_int, &check_spool_inodes },
197 { "check_spool_space", opt_Kint, &check_spool_space },
198 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
199 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
200 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
201 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
202 #ifdef EXPERIMENTAL_DCC
203 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
204 { "dccifd_address", opt_stringptr, &dccifd_address },
205 { "dccifd_options", opt_stringptr, &dccifd_options },
206 #endif
207 { "delay_warning", opt_timelist, &delay_warning },
208 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
209 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
210 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
211 { "delivery_date_remove", opt_bool, &delivery_date_remove },
212 #ifdef ENABLE_DISABLE_FSYNC
213 { "disable_fsync", opt_bool, &disable_fsync },
214 #endif
215 { "disable_ipv6", opt_bool, &disable_ipv6 },
216 #ifndef DISABLE_DKIM
217 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
218 #endif
219 #ifdef EXPERIMENTAL_DMARC
220 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
221 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
222 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
223 #endif
224 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
225 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
226 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
227 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
228 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
229 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
230 { "dns_retrans", opt_time, &dns_retrans },
231 { "dns_retry", opt_int, &dns_retry },
232 { "dns_use_edns0", opt_int, &dns_use_edns0 },
233 /* This option is now a no-op, retained for compability */
234 { "drop_cr", opt_bool, &drop_cr },
235 /*********************************************************/
236 #ifdef EXPERIMENTAL_DSN
237 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
238 #endif
239 { "dsn_from", opt_stringptr, &dsn_from },
240 { "envelope_to_remove", opt_bool, &envelope_to_remove },
241 { "errors_copy", opt_stringptr, &errors_copy },
242 { "errors_reply_to", opt_stringptr, &errors_reply_to },
243 { "exim_group", opt_gid, &exim_gid },
244 { "exim_path", opt_stringptr, &exim_path },
245 { "exim_user", opt_uid, &exim_uid },
246 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
247 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
248 { "finduser_retries", opt_int, &finduser_retries },
249 { "freeze_tell", opt_stringptr, &freeze_tell },
250 { "gecos_name", opt_stringptr, &gecos_name },
251 { "gecos_pattern", opt_stringptr, &gecos_pattern },
252 #ifdef SUPPORT_TLS
253 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
254 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
255 /* These three gnutls_require_* options stopped working in Exim 4.80 */
256 /* From 4.83 we log a warning; a future relase will remove them */
257 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
258 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
259 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
260 #endif
261 { "header_line_maxsize", opt_int, &header_line_maxsize },
262 { "header_maxsize", opt_int, &header_maxsize },
263 { "headers_charset", opt_stringptr, &headers_charset },
264 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
265 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
266 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
267 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
268 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
269 { "hold_domains", opt_stringptr, &hold_domains },
270 { "host_lookup", opt_stringptr, &host_lookup },
271 { "host_lookup_order", opt_stringptr, &host_lookup_order },
272 { "host_reject_connection", opt_stringptr, &host_reject_connection },
273 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
274 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
275 #ifdef LOOKUP_IBASE
276 { "ibase_servers", opt_stringptr, &ibase_servers },
277 #endif
278 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
279 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
280 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
281 { "keep_environment", opt_stringptr, &keep_environment },
282 { "keep_malformed", opt_time, &keep_malformed },
283 #ifdef LOOKUP_LDAP
284 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
285 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
286 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
287 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
288 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
289 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
290 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
291 { "ldap_start_tls", opt_bool, &eldap_start_tls },
292 { "ldap_version", opt_int, &eldap_version },
293 #endif
294 { "local_from_check", opt_bool, &local_from_check },
295 { "local_from_prefix", opt_stringptr, &local_from_prefix },
296 { "local_from_suffix", opt_stringptr, &local_from_suffix },
297 { "local_interfaces", opt_stringptr, &local_interfaces },
298 { "local_scan_timeout", opt_time, &local_scan_timeout },
299 { "local_sender_retain", opt_bool, &local_sender_retain },
300 { "localhost_number", opt_stringptr, &host_number_string },
301 { "log_file_path", opt_stringptr, &log_file_path },
302 { "log_selector", opt_stringptr, &log_selector_string },
303 { "log_timezone", opt_bool, &log_timezone },
304 { "lookup_open_max", opt_int, &lookup_open_max },
305 { "max_username_length", opt_int, &max_username_length },
306 { "message_body_newlines", opt_bool, &message_body_newlines },
307 { "message_body_visible", opt_mkint, &message_body_visible },
308 { "message_id_header_domain", opt_stringptr, &message_id_domain },
309 { "message_id_header_text", opt_stringptr, &message_id_text },
310 { "message_logs", opt_bool, &message_logs },
311 { "message_size_limit", opt_stringptr, &message_size_limit },
312 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
313 { "move_frozen_messages", opt_bool, &move_frozen_messages },
314 #endif
315 { "mua_wrapper", opt_bool, &mua_wrapper },
316 #ifdef LOOKUP_MYSQL
317 { "mysql_servers", opt_stringptr, &mysql_servers },
318 #endif
319 { "never_users", opt_uidlist, &never_users },
320 #ifdef SUPPORT_TLS
321 { "openssl_options", opt_stringptr, &openssl_options },
322 #endif
323 #ifdef LOOKUP_ORACLE
324 { "oracle_servers", opt_stringptr, &oracle_servers },
325 #endif
326 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
327 #ifdef EXIM_PERL
328 { "perl_at_start", opt_bool, &opt_perl_at_start },
329 { "perl_startup", opt_stringptr, &opt_perl_startup },
330 #endif
331 #ifdef LOOKUP_PGSQL
332 { "pgsql_servers", opt_stringptr, &pgsql_servers },
333 #endif
334 { "pid_file_path", opt_stringptr, &pid_file_path },
335 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
336 #ifndef DISABLE_PRDR
337 { "prdr_enable", opt_bool, &prdr_enable },
338 #endif
339 { "preserve_message_logs", opt_bool, &preserve_message_logs },
340 { "primary_hostname", opt_stringptr, &primary_hostname },
341 { "print_topbitchars", opt_bool, &print_topbitchars },
342 { "process_log_path", opt_stringptr, &process_log_path },
343 { "prod_requires_admin", opt_bool, &prod_requires_admin },
344 #ifdef EXPERIMENTAL_PROXY
345 { "proxy_required_hosts", opt_stringptr, &proxy_required_hosts },
346 #endif
347 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
348 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
349 { "queue_domains", opt_stringptr, &queue_domains },
350 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
351 { "queue_only", opt_bool, &queue_only },
352 { "queue_only_file", opt_stringptr, &queue_only_file },
353 { "queue_only_load", opt_fixed, &queue_only_load },
354 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
355 { "queue_only_override", opt_bool, &queue_only_override },
356 { "queue_run_in_order", opt_bool, &queue_run_in_order },
357 { "queue_run_max", opt_int, &queue_run_max },
358 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
359 { "receive_timeout", opt_time, &receive_timeout },
360 { "received_header_text", opt_stringptr, &received_header_text },
361 { "received_headers_max", opt_int, &received_headers_max },
362 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
363 { "recipients_max", opt_int, &recipients_max },
364 { "recipients_max_reject", opt_bool, &recipients_max_reject },
365 #ifdef EXPERIMENTAL_REDIS
366 { "redis_servers", opt_stringptr, &redis_servers },
367 #endif
368 { "remote_max_parallel", opt_int, &remote_max_parallel },
369 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
370 { "retry_data_expire", opt_time, &retry_data_expire },
371 { "retry_interval_max", opt_time, &retry_interval_max },
372 { "return_path_remove", opt_bool, &return_path_remove },
373 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
374 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
375 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
376 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
377 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
378 { "smtp_accept_max", opt_int, &smtp_accept_max },
379 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
380 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
381 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
382 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
383 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
384 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
385 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
386 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
387 { "smtp_banner", opt_stringptr, &smtp_banner },
388 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
389 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
390 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
391 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
392 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
393 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
394 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
395 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
396 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
397 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
398 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
399 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
400 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
401 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
402 #ifdef WITH_CONTENT_SCAN
403 { "spamd_address", opt_stringptr, &spamd_address },
404 #endif
405 #ifdef EXPERIMENTAL_SPF
406 { "spf_guess", opt_stringptr, &spf_guess },
407 #endif
408 { "split_spool_directory", opt_bool, &split_spool_directory },
409 { "spool_directory", opt_stringptr, &spool_directory },
410 #ifdef LOOKUP_SQLITE
411 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
412 #endif
413 #ifdef EXPERIMENTAL_SRS
414 { "srs_config", opt_stringptr, &srs_config },
415 { "srs_hashlength", opt_int, &srs_hashlength },
416 { "srs_hashmin", opt_int, &srs_hashmin },
417 { "srs_maxage", opt_int, &srs_maxage },
418 { "srs_secrets", opt_stringptr, &srs_secrets },
419 { "srs_usehash", opt_bool, &srs_usehash },
420 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
421 #endif
422 { "strict_acl_vars", opt_bool, &strict_acl_vars },
423 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
424 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
425 { "syslog_duplication", opt_bool, &syslog_duplication },
426 { "syslog_facility", opt_stringptr, &syslog_facility_str },
427 { "syslog_processname", opt_stringptr, &syslog_processname },
428 { "syslog_timestamp", opt_bool, &syslog_timestamp },
429 { "system_filter", opt_stringptr, &system_filter },
430 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
431 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
432 { "system_filter_group", opt_gid, &system_filter_gid },
433 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
434 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
435 { "system_filter_user", opt_uid, &system_filter_uid },
436 { "tcp_nodelay", opt_bool, &tcp_nodelay },
437 #ifdef USE_TCP_WRAPPERS
438 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
439 #endif
440 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
441 { "timezone", opt_stringptr, &timezone_string },
442 #ifdef SUPPORT_TLS
443 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
444 { "tls_certificate", opt_stringptr, &tls_certificate },
445 { "tls_crl", opt_stringptr, &tls_crl },
446 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
447 { "tls_dhparam", opt_stringptr, &tls_dhparam },
448 # ifndef DISABLE_OCSP
449 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
450 # endif
451 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
452 { "tls_privatekey", opt_stringptr, &tls_privatekey },
453 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
454 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
455 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
456 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
457 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
458 #endif
459 { "trusted_groups", opt_gidlist, &trusted_groups },
460 { "trusted_users", opt_uidlist, &trusted_users },
461 { "unknown_login", opt_stringptr, &unknown_login },
462 { "unknown_username", opt_stringptr, &unknown_username },
463 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
464 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
465 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
466 { "warn_message_file", opt_stringptr, &warn_message_file },
467 { "write_rejectlog", opt_bool, &write_rejectlog }
468 };
469
470 static int optionlist_config_size =
471 sizeof(optionlist_config)/sizeof(optionlist);
472
473
474
475 /*************************************************
476 * Find the name of an option *
477 *************************************************/
478
479 /* This function is to aid debugging. Various functions take arguments that are
480 pointer variables in the options table or in option tables for various drivers.
481 For debugging output, it is useful to be able to find the name of the option
482 which is currently being processed. This function finds it, if it exists, by
483 searching the table(s).
484
485 Arguments: a value that is presumed to be in the table above
486 Returns: the option name, or an empty string
487 */
488
489 uschar *
490 readconf_find_option(void *p)
491 {
492 int i;
493 router_instance *r;
494 transport_instance *t;
495
496 for (i = 0; i < optionlist_config_size; i++)
497 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
498
499 for (r = routers; r != NULL; r = r->next)
500 {
501 router_info *ri = r->info;
502 for (i = 0; i < ri->options_count[0]; i++)
503 {
504 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
505 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
506 return US ri->options[i].name;
507 }
508 }
509
510 for (t = transports; t != NULL; t = t->next)
511 {
512 transport_info *ti = t->info;
513 for (i = 0; i < ti->options_count[0]; i++)
514 {
515 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
516 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
517 return US ti->options[i].name;
518 }
519 }
520
521 return US"";
522 }
523
524
525
526
527 /*************************************************
528 * Deal with an assignment to a macro *
529 *************************************************/
530
531 /* This function is called when a line that starts with an upper case letter is
532 encountered. The argument "line" should contain a complete logical line, and
533 start with the first letter of the macro name. The macro name and the
534 replacement text are extracted and stored. Redefinition of existing,
535 non-command line, macros is permitted using '==' instead of '='.
536
537 Arguments:
538 s points to the start of the logical line
539
540 Returns: nothing
541 */
542
543 static void
544 read_macro_assignment(uschar *s)
545 {
546 uschar name[64];
547 int namelen = 0;
548 BOOL redef = FALSE;
549 macro_item *m;
550 macro_item *mlast = NULL;
551
552 while (isalnum(*s) || *s == '_')
553 {
554 if (namelen >= sizeof(name) - 1)
555 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
556 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
557 name[namelen++] = *s++;
558 }
559 name[namelen] = 0;
560
561 while (isspace(*s)) s++;
562 if (*s++ != '=')
563 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
564
565 if (*s == '=')
566 {
567 redef = TRUE;
568 s++;
569 }
570 while (isspace(*s)) s++;
571
572 /* If an existing macro of the same name was defined on the command line, we
573 just skip this definition. It's an error to attempt to redefine a macro without
574 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
575 It is also an error to define a macro whose name begins with the name of a
576 previously defined macro. Note: it is documented that the other way round
577 works. */
578
579 for (m = macros; m != NULL; m = m->next)
580 {
581 int len = Ustrlen(m->name);
582
583 if (Ustrcmp(m->name, name) == 0)
584 {
585 if (!m->command_line && !redef)
586 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
587 "defined (use \"==\" if you want to redefine it", name);
588 break;
589 }
590
591 if (len < namelen && Ustrstr(name, m->name) != NULL)
592 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
593 "a macro because previously defined macro \"%s\" is a substring",
594 name, m->name);
595
596 /* We cannot have this test, because it is documented that a substring
597 macro is permitted (there is even an example).
598 *
599 * if (len > namelen && Ustrstr(m->name, name) != NULL)
600 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
601 * "a macro because it is a substring of previously defined macro \"%s\"",
602 * name, m->name);
603 */
604
605 mlast = m;
606 }
607
608 /* Check for an overriding command-line definition. */
609
610 if (m != NULL && m->command_line) return;
611
612 /* Redefinition must refer to an existing macro. */
613
614 if (redef)
615 {
616 if (m == NULL)
617 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
618 "\"%s\"", name);
619 }
620
621 /* We have a new definition. The macro_item structure includes a final vector
622 called "name" which is one byte long. Thus, adding "namelen" gives us enough
623 room to store the "name" string. */
624
625 else
626 {
627 m = store_get(sizeof(macro_item) + namelen);
628 if (macros == NULL) macros = m; else mlast->next = m;
629 Ustrncpy(m->name, name, namelen);
630 m->name[namelen] = 0;
631 m->next = NULL;
632 m->command_line = FALSE;
633 }
634
635 /* Set the value of the new or redefined macro */
636
637 m->replacement = string_copy(s);
638 }
639
640
641
642
643
644 /*************************************************
645 * Read configuration line *
646 *************************************************/
647
648 /* A logical line of text is read from the configuration file into the big
649 buffer, taking account of macros, .includes, and continuations. The size of
650 big_buffer is increased if necessary. The count of configuration lines is
651 maintained. Physical input lines starting with # (ignoring leading white space,
652 and after macro replacement) and empty logical lines are always ignored.
653 Leading and trailing spaces are removed.
654
655 If we hit a line of the form "begin xxxx", the xxxx is placed in the
656 next_section vector, and the function returns NULL, indicating the end of a
657 configuration section. On end-of-file, NULL is returned with next_section
658 empty.
659
660 Arguments: none
661
662 Returns: a pointer to the first non-blank in the line,
663 or NULL if eof or end of section is reached
664 */
665
666 static uschar *
667 get_config_line(void)
668 {
669 int startoffset = 0; /* To first non-blank char in logical line */
670 int len = 0; /* Of logical line so far */
671 int newlen;
672 uschar *s, *ss;
673 macro_item *m;
674 BOOL macro_found;
675
676 /* Loop for handling continuation lines, skipping comments, and dealing with
677 .include files. */
678
679 for (;;)
680 {
681 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
682 {
683 if (config_file_stack != NULL) /* EOF inside .include */
684 {
685 (void)fclose(config_file);
686 config_file = config_file_stack->file;
687 config_filename = config_file_stack->filename;
688 config_lineno = config_file_stack->lineno;
689 config_file_stack = config_file_stack->next;
690 continue;
691 }
692
693 /* EOF at top level */
694
695 if (cstate_stack_ptr >= 0)
696 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
697 "Unexpected end of configuration file: .endif missing");
698
699 if (len != 0) break; /* EOF after continuation */
700 next_section[0] = 0; /* EOF at start of logical line */
701 return NULL;
702 }
703
704 config_lineno++;
705 newlen = len + Ustrlen(big_buffer + len);
706
707 /* Handle pathologically long physical lines - yes, it did happen - by
708 extending big_buffer at this point. The code also copes with very long
709 logical lines. */
710
711 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
712 {
713 uschar *newbuffer;
714 big_buffer_size += BIG_BUFFER_SIZE;
715 newbuffer = store_malloc(big_buffer_size);
716
717 /* This use of strcpy is OK because we know that the string in the old
718 buffer is shorter than the new buffer. */
719
720 Ustrcpy(newbuffer, big_buffer);
721 store_free(big_buffer);
722 big_buffer = newbuffer;
723 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
724 break;
725 newlen += Ustrlen(big_buffer + newlen);
726 }
727
728 /* Find the true start of the physical line - leading spaces are always
729 ignored. */
730
731 ss = big_buffer + len;
732 while (isspace(*ss)) ss++;
733
734 /* Process the physical line for macros. If this is the start of the logical
735 line, skip over initial text at the start of the line if it starts with an
736 upper case character followed by a sequence of name characters and an equals
737 sign, because that is the definition of a new macro, and we don't do
738 replacement therein. */
739
740 s = ss;
741 if (len == 0 && isupper(*s))
742 {
743 while (isalnum(*s) || *s == '_') s++;
744 while (isspace(*s)) s++;
745 if (*s != '=') s = ss; /* Not a macro definition */
746 }
747
748 /* For each defined macro, scan the line (from after XXX= if present),
749 replacing all occurrences of the macro. */
750
751 macro_found = FALSE;
752 for (m = macros; m != NULL; m = m->next)
753 {
754 uschar *p, *pp;
755 uschar *t = s;
756
757 while ((p = Ustrstr(t, m->name)) != NULL)
758 {
759 int moveby;
760 int namelen = Ustrlen(m->name);
761 int replen = Ustrlen(m->replacement);
762
763 /* Expand the buffer if necessary */
764
765 while (newlen - namelen + replen + 1 > big_buffer_size)
766 {
767 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
768 uschar *newbuffer = store_malloc(newsize);
769 memcpy(newbuffer, big_buffer, newlen + 1);
770 p = newbuffer + (p - big_buffer);
771 s = newbuffer + (s - big_buffer);
772 ss = newbuffer + (ss - big_buffer);
773 t = newbuffer + (t - big_buffer);
774 big_buffer_size = newsize;
775 store_free(big_buffer);
776 big_buffer = newbuffer;
777 }
778
779 /* Shuffle the remaining characters up or down in the buffer before
780 copying in the replacement text. Don't rescan the replacement for this
781 same macro. */
782
783 pp = p + namelen;
784 moveby = replen - namelen;
785 if (moveby != 0)
786 {
787 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
788 newlen += moveby;
789 }
790 Ustrncpy(p, m->replacement, replen);
791 t = p + replen;
792 macro_found = TRUE;
793 }
794 }
795
796 /* An empty macro replacement at the start of a line could mean that ss no
797 longer points to the first non-blank character. */
798
799 while (isspace(*ss)) ss++;
800
801 /* Check for comment lines - these are physical lines. */
802
803 if (*ss == '#') continue;
804
805 /* Handle conditionals, which are also applied to physical lines. Conditions
806 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
807 expansion occured on the rest of the line. A preliminary test for the leading
808 '.' saves effort on most lines. */
809
810 if (*ss == '.')
811 {
812 int i;
813
814 /* Search the list of conditional directives */
815
816 for (i = 0; i < cond_list_size; i++)
817 {
818 int n;
819 cond_item *c = cond_list+i;
820 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
821
822 /* The following character must be white space or end of string */
823
824 n = ss[1 + c->namelen];
825 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
826
827 /* .ifdef and .ifndef push the current state onto the stack, then set
828 a new one from the table. Stack overflow is an error */
829
830 if (c->pushpop > 0)
831 {
832 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
833 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
834 ".%s nested too deeply", c->name);
835 cstate_stack[++cstate_stack_ptr] = cstate;
836 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
837 }
838
839 /* For any of the others, stack underflow is an error. The next state
840 comes either from the stack (.endif) or from the table. */
841
842 else
843 {
844 if (cstate_stack_ptr < 0)
845 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
846 ".%s without matching .ifdef", c->name);
847 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
848 next_cstate[cstate][macro_found? c->action1 : c->action2];
849 }
850
851 /* Having dealt with a directive, break the loop */
852
853 break;
854 }
855
856 /* If we have handled a conditional directive, continue with the next
857 physical line. Otherwise, fall through. */
858
859 if (i < cond_list_size) continue;
860 }
861
862 /* If the conditional state is not 0 (actively using these lines), ignore
863 this input line. */
864
865 if (cstate != 0) continue; /* Conditional skip */
866
867 /* Handle .include lines - these are also physical lines. */
868
869 if (Ustrncmp(ss, ".include", 8) == 0 &&
870 (isspace(ss[8]) ||
871 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
872 {
873 uschar *t;
874 int include_if_exists = isspace(ss[8])? 0 : 10;
875 config_file_item *save;
876 struct stat statbuf;
877
878 ss += 9 + include_if_exists;
879 while (isspace(*ss)) ss++;
880 t = ss + Ustrlen(ss);
881 while (t > ss && isspace(t[-1])) t--;
882 if (*ss == '\"' && t[-1] == '\"')
883 {
884 ss++;
885 t--;
886 }
887 *t = 0;
888
889 if (*ss != '/')
890 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
891 "absolute path \"%s\"", ss);
892
893 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
894
895 save = store_get(sizeof(config_file_item));
896 save->next = config_file_stack;
897 config_file_stack = save;
898 save->file = config_file;
899 save->filename = config_filename;
900 save->lineno = config_lineno;
901
902 config_file = Ufopen(ss, "rb");
903 if (config_file == NULL)
904 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
905 "configuration file %s", ss);
906 config_filename = string_copy(ss);
907 config_lineno = 0;
908 continue;
909 }
910
911 /* If this is the start of the logical line, remember where the non-blank
912 data starts. Otherwise shuffle down continuation lines to remove leading
913 white space. */
914
915 if (len == 0)
916 startoffset = ss - big_buffer;
917 else
918 {
919 s = big_buffer + len;
920 if (ss > s)
921 {
922 memmove(s, ss, (newlen - len) - (ss - s) + 1);
923 newlen -= ss - s;
924 }
925 }
926
927 /* Accept the new addition to the line. Remove trailing white space. */
928
929 len = newlen;
930 while (len > 0 && isspace(big_buffer[len-1])) len--;
931 big_buffer[len] = 0;
932
933 /* We are done if the line does not end in backslash and contains some data.
934 Empty logical lines are ignored. For continuations, remove the backslash and
935 go round the loop to read the continuation line. */
936
937 if (len > 0)
938 {
939 if (big_buffer[len-1] != '\\') break; /* End of logical line */
940 big_buffer[--len] = 0; /* Remove backslash */
941 }
942 } /* Loop for reading multiple physical lines */
943
944 /* We now have a logical line. Test for the end of a configuration section (or,
945 more accurately, for the start of the next section). Place the name of the next
946 section in next_section, and return NULL. If the name given is longer than
947 next_section, truncate it. It will be unrecognized later, because all the known
948 section names do fit. Leave space for pluralizing. */
949
950 s = big_buffer + startoffset; /* First non-space character */
951 if (strncmpic(s, US"begin ", 6) == 0)
952 {
953 s += 6;
954 while (isspace(*s)) s++;
955 if (big_buffer + len - s > sizeof(next_section) - 2)
956 s[sizeof(next_section) - 2] = 0;
957 Ustrcpy(next_section, s);
958 return NULL;
959 }
960
961 /* Return the first non-blank character. */
962
963 return s;
964 }
965
966
967
968 /*************************************************
969 * Read a name *
970 *************************************************/
971
972 /* The yield is the pointer to the next uschar. Names longer than the
973 output space are silently truncated. This function is also used from acl.c when
974 parsing ACLs.
975
976 Arguments:
977 name where to put the name
978 len length of name
979 s input pointer
980
981 Returns: new input pointer
982 */
983
984 uschar *
985 readconf_readname(uschar *name, int len, uschar *s)
986 {
987 int p = 0;
988 while (isspace(*s)) s++;
989 if (isalpha(*s))
990 {
991 while (isalnum(*s) || *s == '_')
992 {
993 if (p < len-1) name[p++] = *s;
994 s++;
995 }
996 }
997 name[p] = 0;
998 while (isspace(*s)) s++;
999 return s;
1000 }
1001
1002
1003
1004
1005 /*************************************************
1006 * Read a time value *
1007 *************************************************/
1008
1009 /* This function is also called from outside, to read argument
1010 time values. The format of a time value is:
1011
1012 [<n>w][<n>d][<n>h][<n>m][<n>s]
1013
1014 as long as at least one is present. If a format error is encountered,
1015 return a negative value. The value must be terminated by the given
1016 terminator.
1017
1018 Arguments:
1019 s input pointer
1020 terminator required terminating character
1021 return_msec if TRUE, allow fractional seconds and return milliseconds
1022
1023 Returns: the time value, or -1 on syntax error
1024 value is seconds if return_msec is FALSE
1025 value is milliseconds if return_msec is TRUE
1026 */
1027
1028 int
1029 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
1030 {
1031 int yield = 0;
1032 for (;;)
1033 {
1034 int value, count;
1035 double fraction;
1036
1037 if (!isdigit(*s)) return -1;
1038 (void)sscanf(CS s, "%d%n", &value, &count);
1039 s += count;
1040
1041 switch (*s)
1042 {
1043 case 'w': value *= 7;
1044 case 'd': value *= 24;
1045 case 'h': value *= 60;
1046 case 'm': value *= 60;
1047 case 's': s++;
1048 break;
1049
1050 case '.':
1051 if (!return_msec) return -1;
1052 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1053 s += count;
1054 if (*s++ != 's') return -1;
1055 yield += (int)(fraction * 1000.0);
1056 break;
1057
1058 default: return -1;
1059 }
1060
1061 if (return_msec) value *= 1000;
1062 yield += value;
1063 if (*s == terminator) return yield;
1064 }
1065 /* Control never reaches here. */
1066 }
1067
1068
1069
1070 /*************************************************
1071 * Read a fixed point value *
1072 *************************************************/
1073
1074 /* The value is returned *1000
1075
1076 Arguments:
1077 s input pointer
1078 terminator required terminator
1079
1080 Returns: the value, or -1 on error
1081 */
1082
1083 static int
1084 readconf_readfixed(uschar *s, int terminator)
1085 {
1086 int yield = 0;
1087 int value, count;
1088 if (!isdigit(*s)) return -1;
1089 (void)sscanf(CS s, "%d%n", &value, &count);
1090 s += count;
1091 yield = value * 1000;
1092 if (*s == '.')
1093 {
1094 int m = 100;
1095 while (isdigit((*(++s))))
1096 {
1097 yield += (*s - '0') * m;
1098 m /= 10;
1099 }
1100 }
1101
1102 return (*s == terminator)? yield : (-1);
1103 }
1104
1105
1106
1107 /*************************************************
1108 * Find option in list *
1109 *************************************************/
1110
1111 /* The lists are always in order, so binary chop can be used.
1112
1113 Arguments:
1114 name the option name to search for
1115 ol the first entry in the option list
1116 last one more than the offset of the last entry in the option list
1117
1118 Returns: pointer to an option entry, or NULL if not found
1119 */
1120
1121 static optionlist *
1122 find_option(uschar *name, optionlist *ol, int last)
1123 {
1124 int first = 0;
1125 while (last > first)
1126 {
1127 int middle = (first + last)/2;
1128 int c = Ustrcmp(name, ol[middle].name);
1129 if (c == 0) return ol + middle;
1130 else if (c > 0) first = middle + 1;
1131 else last = middle;
1132 }
1133 return NULL;
1134 }
1135
1136
1137
1138 /*************************************************
1139 * Find a set flag in option list *
1140 *************************************************/
1141
1142 /* Because some versions of Unix make no restrictions on the values of uids and
1143 gids (even negative ones), we cannot represent "unset" by a special value.
1144 There is therefore a separate boolean variable for each one indicating whether
1145 a value is set or not. This function returns a pointer to the boolean, given
1146 the original option name. It is a major disaster if the flag cannot be found.
1147
1148 Arguments:
1149 name the name of the uid or gid option
1150 oltop points to the start of the relevant option list
1151 last one more than the offset of the last item in the option list
1152 data_block NULL when reading main options => data values in the option
1153 list are absolute addresses; otherwise they are byte offsets
1154 in data_block (used for driver options)
1155
1156 Returns: a pointer to the boolean flag.
1157 */
1158
1159 static BOOL *
1160 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1161 {
1162 optionlist *ol;
1163 uschar name2[64];
1164 sprintf(CS name2, "*set_%.50s", name);
1165 ol = find_option(name2, oltop, last);
1166 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1167 "Exim internal error: missing set flag for %s", name);
1168 return (data_block == NULL)? (BOOL *)(ol->value) :
1169 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1170 }
1171
1172
1173
1174
1175 /*************************************************
1176 * Output extra characters message and die *
1177 *************************************************/
1178
1179 /* Called when an option line has junk on the end. Sometimes this is because
1180 the sysadmin thinks comments are permitted.
1181
1182 Arguments:
1183 s points to the extra characters
1184 t1..t3 strings to insert in the log message
1185
1186 Returns: doesn't return; dies
1187 */
1188
1189 static void
1190 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1191 {
1192 uschar *comment = US"";
1193 if (*s == '#') comment = US" (# is comment only at line start)";
1194 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1195 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1196 }
1197
1198
1199
1200 /*************************************************
1201 * Read rewrite information *
1202 *************************************************/
1203
1204 /* Each line of rewrite information contains:
1205
1206 . A complete address in the form user@domain, possibly with
1207 leading * for each part; or alternatively, a regex.
1208
1209 . A replacement string (which will be expanded).
1210
1211 . An optional sequence of one-letter flags, indicating which
1212 headers etc. to apply this rule to.
1213
1214 All this is decoded and placed into a control block. The OR of the flags is
1215 maintained in a common word.
1216
1217 Arguments:
1218 p points to the string that makes up the rule
1219 existflags points to the overall flag word
1220 isglobal TRUE if reading global rewrite rules
1221
1222 Returns: the control block for the parsed rule.
1223 */
1224
1225 static rewrite_rule *
1226 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1227 {
1228 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1229
1230 next->next = NULL;
1231 next->key = string_dequote(&p);
1232
1233 while (isspace(*p)) p++;
1234 if (*p == 0)
1235 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1236 "missing rewrite replacement string");
1237
1238 next->flags = 0;
1239 next->replacement = string_dequote(&p);
1240
1241 while (*p != 0) switch (*p++)
1242 {
1243 case ' ': case '\t': break;
1244
1245 case 'q': next->flags |= rewrite_quit; break;
1246 case 'w': next->flags |= rewrite_whole; break;
1247
1248 case 'h': next->flags |= rewrite_all_headers; break;
1249 case 's': next->flags |= rewrite_sender; break;
1250 case 'f': next->flags |= rewrite_from; break;
1251 case 't': next->flags |= rewrite_to; break;
1252 case 'c': next->flags |= rewrite_cc; break;
1253 case 'b': next->flags |= rewrite_bcc; break;
1254 case 'r': next->flags |= rewrite_replyto; break;
1255
1256 case 'E': next->flags |= rewrite_all_envelope; break;
1257 case 'F': next->flags |= rewrite_envfrom; break;
1258 case 'T': next->flags |= rewrite_envto; break;
1259
1260 case 'Q': next->flags |= rewrite_qualify; break;
1261 case 'R': next->flags |= rewrite_repeat; break;
1262
1263 case 'S':
1264 next->flags |= rewrite_smtp;
1265 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1266 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1267 "rewrite rule has the S flag but is not a regular expression");
1268 break;
1269
1270 default:
1271 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1272 "unknown rewrite flag character '%c' "
1273 "(could be missing quotes round replacement item)", p[-1]);
1274 break;
1275 }
1276
1277 /* If no action flags are set, set all the "normal" rewrites. */
1278
1279 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1280 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1281
1282 /* Remember which exist, for optimization, and return the rule */
1283
1284 *existflags |= next->flags;
1285 return next;
1286 }
1287
1288
1289
1290
1291 /*************************************************
1292 * Read global rewrite information *
1293 *************************************************/
1294
1295 /* Each line is a single rewrite rule; it is parsed into a control block
1296 by readconf_one_rewrite(), and its flags are ORed into the global flag
1297 word rewrite_existflags. */
1298
1299 void
1300 readconf_rewrites(void)
1301 {
1302 rewrite_rule **chain = &global_rewrite_rules;
1303 uschar *p;
1304
1305 while ((p = get_config_line()) != NULL)
1306 {
1307 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1308 *chain = next;
1309 chain = &(next->next);
1310 }
1311 }
1312
1313
1314
1315 /*************************************************
1316 * Read a string *
1317 *************************************************/
1318
1319 /* Strings are read into the normal store pool. As long we aren't too
1320 near the end of the current block, the string will just use what is necessary
1321 on the top of the stacking pool, because string_cat() uses the extension
1322 mechanism.
1323
1324 Argument:
1325 s the rest of the input line
1326 name the option name (for errors)
1327
1328 Returns: pointer to the string
1329 */
1330
1331 static uschar *
1332 read_string(uschar *s, uschar *name)
1333 {
1334 uschar *yield;
1335 uschar *ss;
1336
1337 if (*s != '\"') return string_copy(s);
1338
1339 ss = s;
1340 yield = string_dequote(&s);
1341
1342 if (s == ss+1 || s[-1] != '\"')
1343 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1344 "missing quote at end of string value for %s", name);
1345
1346 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1347
1348 return yield;
1349 }
1350
1351
1352 /*************************************************
1353 * Handle option line *
1354 *************************************************/
1355
1356 /* This function is called from several places to process a line containing the
1357 setting of an option. The first argument is the line to be decoded; it has been
1358 checked not to be empty and not to start with '#'. Trailing newlines and white
1359 space have been removed. The second argument is a pointer to the list of
1360 variable names that are to be recognized, together with their types and
1361 locations, and the third argument gives the number of entries in the list.
1362
1363 The fourth argument is a pointer to a data block. If it is NULL, then the data
1364 values in the options list are absolute addresses. Otherwise, they are byte
1365 offsets in the data block.
1366
1367 String option data may continue onto several lines; this function reads further
1368 data from config_file if necessary.
1369
1370 The yield of this function is normally zero. If a string continues onto
1371 multiple lines, then the data value is permitted to be followed by a comma
1372 or a semicolon (for use in drivers) and the yield is that character.
1373
1374 Arguments:
1375 buffer contains the configuration line to be handled
1376 oltop points to the start of the relevant option list
1377 last one more than the offset of the last item in the option list
1378 data_block NULL when reading main options => data values in the option
1379 list are absolute addresses; otherwise they are byte offsets
1380 in data_block when they have opt_public set; otherwise
1381 they are byte offsets in data_block->options_block.
1382 unknown_txt format string to use in panic message for unknown option;
1383 must contain %s for option name
1384 if given as NULL, don't panic on unknown option
1385
1386 Returns: TRUE if an option was read successfully,
1387 FALSE false for an unknown option if unknown_txt == NULL,
1388 otherwise panic and die on an unknown option
1389 */
1390
1391 static BOOL
1392 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1393 void *data_block, uschar *unknown_txt)
1394 {
1395 int ptr = 0;
1396 int offset = 0;
1397 int n, count, type, value;
1398 int issecure = 0;
1399 uid_t uid;
1400 gid_t gid;
1401 BOOL boolvalue = TRUE;
1402 BOOL freesptr = TRUE;
1403 optionlist *ol, *ol2;
1404 struct passwd *pw;
1405 void *reset_point;
1406 int intbase = 0;
1407 uschar *inttype = US"";
1408 uschar *sptr;
1409 uschar *s = buffer;
1410 uschar *saved_condition, *strtemp;
1411 uschar **str_target;
1412 uschar name[64];
1413 uschar name2[64];
1414
1415 /* There may be leading spaces; thereafter, we expect an option name starting
1416 with a letter. */
1417
1418 while (isspace(*s)) s++;
1419 if (!isalpha(*s))
1420 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1421
1422 /* Read the name of the option, and skip any subsequent white space. If
1423 it turns out that what we read was "hide", set the flag indicating that
1424 this is a secure option, and loop to read the next word. */
1425
1426 for (n = 0; n < 2; n++)
1427 {
1428 while (isalnum(*s) || *s == '_')
1429 {
1430 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1431 s++;
1432 }
1433 name[ptr] = 0;
1434 while (isspace(*s)) s++;
1435 if (Ustrcmp(name, "hide") != 0) break;
1436 issecure = opt_secure;
1437 ptr = 0;
1438 }
1439
1440 /* Deal with "no_" or "not_" here for booleans */
1441
1442 if (Ustrncmp(name, "no_", 3) == 0)
1443 {
1444 boolvalue = FALSE;
1445 offset = 3;
1446 }
1447
1448 if (Ustrncmp(name, "not_", 4) == 0)
1449 {
1450 boolvalue = FALSE;
1451 offset = 4;
1452 }
1453
1454 /* Search the list for the given name. A non-existent name, or an option that
1455 is set twice, is a disaster. */
1456
1457 ol = find_option(name + offset, oltop, last);
1458
1459 if (ol == NULL)
1460 {
1461 if (unknown_txt == NULL) return FALSE;
1462 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1463 }
1464
1465 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1466 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1467 "\"%s\" option set for the second time", name);
1468
1469 ol->type |= opt_set | issecure;
1470 type = ol->type & opt_mask;
1471
1472 /* Types with data values must be followed by '='; the "no[t]_" prefix
1473 applies only to boolean values. */
1474
1475 if (type < opt_bool || type > opt_bool_last)
1476 {
1477 if (offset != 0)
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1479 "negation prefix applied to a non-boolean option");
1480 if (*s == 0)
1481 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1482 "unexpected end of line (data missing) after %s", name);
1483 if (*s != '=')
1484 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1485 }
1486
1487 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1488 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1489 ultimately expands to one of those values. */
1490
1491 else if (*s != 0 && (offset != 0 || *s != '='))
1492 extra_chars_error(s, US"boolean option ", name, US"");
1493
1494 /* Skip white space after = */
1495
1496 if (*s == '=') while (isspace((*(++s))));
1497
1498 /* If there is a data block and the opt_public flag is not set, change
1499 the data block pointer to the private options block. */
1500
1501 if (data_block != NULL && (ol->type & opt_public) == 0)
1502 data_block = (void *)(((driver_instance *)data_block)->options_block);
1503
1504 /* Now get the data according to the type. */
1505
1506 switch (type)
1507 {
1508 /* If a string value is not enclosed in quotes, it consists of
1509 the rest of the current line, verbatim. Otherwise, string escapes
1510 are processed.
1511
1512 A transport is specified as a string, which is then looked up in the
1513 list of transports. A search type is specified as one of a number of
1514 known strings.
1515
1516 A set or rewrite rules for a driver is specified as a string, which is
1517 then parsed into a suitable chain of control blocks.
1518
1519 Uids and gids are specified as strings which are then looked up in the
1520 passwd file. Lists of uids and gids are similarly specified as colon-
1521 separated strings. */
1522
1523 case opt_stringptr:
1524 case opt_uid:
1525 case opt_gid:
1526 case opt_expand_uid:
1527 case opt_expand_gid:
1528 case opt_uidlist:
1529 case opt_gidlist:
1530 case opt_rewrite:
1531
1532 reset_point = sptr = read_string(s, name);
1533
1534 /* Having read a string, we now have several different ways of using it,
1535 depending on the data type, so do another switch. If keeping the actual
1536 string is not required (because it is interpreted), freesptr is set TRUE,
1537 and at the end we reset the pool. */
1538
1539 switch (type)
1540 {
1541 /* If this was a string, set the variable to point to the new string,
1542 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1543 rules, we still keep the string (for printing), and parse the rules into a
1544 control block and flags word. */
1545
1546 case opt_stringptr:
1547 if (data_block == NULL)
1548 str_target = (uschar **)(ol->value);
1549 else
1550 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1551 if (ol->type & opt_rep_con)
1552 {
1553 /* We already have a condition, we're conducting a crude hack to let
1554 multiple condition rules be chained together, despite storing them in
1555 text form. */
1556 saved_condition = *str_target;
1557 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1558 saved_condition, sptr);
1559 *str_target = string_copy_malloc(strtemp);
1560 /* TODO(pdp): there is a memory leak here and just below
1561 when we set 3 or more conditions; I still don't
1562 understand the store mechanism enough to know
1563 what's the safe way to free content from an earlier store.
1564 AFAICT, stores stack, so freeing an early stored item also stores
1565 all data alloc'd after it. If we knew conditions were adjacent,
1566 we could survive that, but we don't. So I *think* we need to take
1567 another bit from opt_type to indicate "malloced"; this seems like
1568 quite a hack, especially for this one case. It also means that
1569 we can't ever reclaim the store from the *first* condition.
1570
1571 Because we only do this once, near process start-up, I'm prepared to
1572 let this slide for the time being, even though it rankles. */
1573 }
1574 else if (ol->type & opt_rep_str)
1575 {
1576 uschar sep = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1577 uschar * cp;
1578
1579 /* Strip trailing whitespace and seperators */
1580 for (cp = sptr + Ustrlen(sptr) - 1;
1581 cp >= sptr && (*cp == '\n' || *cp == '\t' || *cp == ' ' || *cp == sep);
1582 cp--) *cp = '\0';
1583
1584 if (cp >= sptr)
1585 *str_target = string_copy_malloc(
1586 *str_target ? string_sprintf("%s%c%s", *str_target, sep, sptr)
1587 : sptr);
1588 }
1589 else
1590 {
1591 *str_target = sptr;
1592 freesptr = FALSE;
1593 }
1594 break;
1595
1596 case opt_rewrite:
1597 if (data_block == NULL)
1598 *((uschar **)(ol->value)) = sptr;
1599 else
1600 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1601 freesptr = FALSE;
1602 if (type == opt_rewrite)
1603 {
1604 int sep = 0;
1605 int *flagptr;
1606 uschar *p = sptr;
1607 rewrite_rule **chain;
1608 optionlist *ol3;
1609
1610 sprintf(CS name2, "*%.50s_rules", name);
1611 ol2 = find_option(name2, oltop, last);
1612 sprintf(CS name2, "*%.50s_flags", name);
1613 ol3 = find_option(name2, oltop, last);
1614
1615 if (ol2 == NULL || ol3 == NULL)
1616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1617 "rewrite rules not available for driver");
1618
1619 if (data_block == NULL)
1620 {
1621 chain = (rewrite_rule **)(ol2->value);
1622 flagptr = (int *)(ol3->value);
1623 }
1624 else
1625 {
1626 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1627 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1628 }
1629
1630 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1631 != NULL)
1632 {
1633 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1634 *chain = next;
1635 chain = &(next->next);
1636 }
1637
1638 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1639 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1640 "non-header rewrite - not allowed at transport time -");
1641 }
1642 break;
1643
1644 /* If it was an expanded uid, see if there is any expansion to be
1645 done by checking for the presence of a $ character. If there is, save it
1646 in the corresponding *expand_user option field. Otherwise, fall through
1647 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1648 of data. */
1649
1650 case opt_expand_uid:
1651 sprintf(CS name2, "*expand_%.50s", name);
1652 ol2 = find_option(name2, oltop, last);
1653 if (ol2 != NULL)
1654 {
1655 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1656
1657 if (data_block == NULL)
1658 *((uschar **)(ol2->value)) = ss;
1659 else
1660 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1661
1662 if (ss != NULL)
1663 {
1664 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1665 freesptr = FALSE;
1666 break;
1667 }
1668 }
1669
1670 /* Look up a fixed uid, and also make use of the corresponding gid
1671 if a passwd entry is returned and the gid has not been set. */
1672
1673 case opt_uid:
1674 if (!route_finduser(sptr, &pw, &uid))
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1676 if (data_block == NULL)
1677 *((uid_t *)(ol->value)) = uid;
1678 else
1679 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1680
1681 /* Set the flag indicating a fixed value is set */
1682
1683 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1684
1685 /* Handle matching gid if we have a passwd entry: done by finding the
1686 same name with terminating "user" changed to "group"; if not found,
1687 ignore. Also ignore if the value is already set. */
1688
1689 if (pw == NULL) break;
1690 Ustrcpy(name+Ustrlen(name)-4, "group");
1691 ol2 = find_option(name, oltop, last);
1692 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1693 (ol2->type & opt_mask) == opt_expand_gid))
1694 {
1695 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1696 if (! *set_flag)
1697 {
1698 if (data_block == NULL)
1699 *((gid_t *)(ol2->value)) = pw->pw_gid;
1700 else
1701 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1702 *set_flag = TRUE;
1703 }
1704 }
1705 break;
1706
1707 /* If it was an expanded gid, see if there is any expansion to be
1708 done by checking for the presence of a $ character. If there is, save it
1709 in the corresponding *expand_user option field. Otherwise, fall through
1710 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1711 of data. */
1712
1713 case opt_expand_gid:
1714 sprintf(CS name2, "*expand_%.50s", name);
1715 ol2 = find_option(name2, oltop, last);
1716 if (ol2 != NULL)
1717 {
1718 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1719
1720 if (data_block == NULL)
1721 *((uschar **)(ol2->value)) = ss;
1722 else
1723 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1724
1725 if (ss != NULL)
1726 {
1727 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1728 freesptr = FALSE;
1729 break;
1730 }
1731 }
1732
1733 /* Handle freestanding gid */
1734
1735 case opt_gid:
1736 if (!route_findgroup(sptr, &gid))
1737 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1738 if (data_block == NULL)
1739 *((gid_t *)(ol->value)) = gid;
1740 else
1741 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1742 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1743 break;
1744
1745 /* If it was a uid list, look up each individual entry, and build
1746 a vector of uids, with a count in the first element. Put the vector
1747 in malloc store so we can free the string. (We are reading into
1748 permanent store already.) */
1749
1750 case opt_uidlist:
1751 {
1752 int count = 1;
1753 uid_t *list;
1754 int ptr = 0;
1755 uschar *p;
1756 uschar *op = expand_string (sptr);
1757
1758 if (op == NULL)
1759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1760 name, expand_string_message);
1761
1762 p = op;
1763 if (*p != 0) count++;
1764 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1765 list = store_malloc(count*sizeof(uid_t));
1766 list[ptr++] = (uid_t)(count - 1);
1767
1768 if (data_block == NULL)
1769 *((uid_t **)(ol->value)) = list;
1770 else
1771 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1772
1773 p = op;
1774 while (count-- > 1)
1775 {
1776 int sep = 0;
1777 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1778 if (!route_finduser(big_buffer, NULL, &uid))
1779 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1780 big_buffer);
1781 list[ptr++] = uid;
1782 }
1783 }
1784 break;
1785
1786 /* If it was a gid list, look up each individual entry, and build
1787 a vector of gids, with a count in the first element. Put the vector
1788 in malloc store so we can free the string. (We are reading into permanent
1789 store already.) */
1790
1791 case opt_gidlist:
1792 {
1793 int count = 1;
1794 gid_t *list;
1795 int ptr = 0;
1796 uschar *p;
1797 uschar *op = expand_string (sptr);
1798
1799 if (op == NULL)
1800 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1801 name, expand_string_message);
1802
1803 p = op;
1804 if (*p != 0) count++;
1805 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1806 list = store_malloc(count*sizeof(gid_t));
1807 list[ptr++] = (gid_t)(count - 1);
1808
1809 if (data_block == NULL)
1810 *((gid_t **)(ol->value)) = list;
1811 else
1812 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1813
1814 p = op;
1815 while (count-- > 1)
1816 {
1817 int sep = 0;
1818 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1819 if (!route_findgroup(big_buffer, &gid))
1820 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1821 big_buffer);
1822 list[ptr++] = gid;
1823 }
1824 }
1825 break;
1826 }
1827
1828 /* Release store if the value of the string doesn't need to be kept. */
1829
1830 if (freesptr) store_reset(reset_point);
1831 break;
1832
1833 /* Expanded boolean: if no characters follow, or if there are no dollar
1834 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1835 save the string for later expansion in the alternate place. */
1836
1837 case opt_expand_bool:
1838 if (*s != 0 && Ustrchr(s, '$') != 0)
1839 {
1840 sprintf(CS name2, "*expand_%.50s", name);
1841 ol2 = find_option(name2, oltop, last);
1842 if (ol2 != NULL)
1843 {
1844 reset_point = sptr = read_string(s, name);
1845 if (data_block == NULL)
1846 *((uschar **)(ol2->value)) = sptr;
1847 else
1848 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1849 freesptr = FALSE;
1850 break;
1851 }
1852 }
1853 /* Fall through */
1854
1855 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1856 look for yes/not/true/false. Some booleans are stored in a single bit in
1857 a single int. There's a special fudge for verify settings; without a suffix
1858 they set both xx_sender and xx_recipient. The table points to the sender
1859 value; search subsequently for the recipient. There's another special case:
1860 opt_bool_set also notes when a boolean has been set. */
1861
1862 case opt_bool:
1863 case opt_bit:
1864 case opt_bool_verify:
1865 case opt_bool_set:
1866 if (*s != 0)
1867 {
1868 s = readconf_readname(name2, 64, s);
1869 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1870 boolvalue = TRUE;
1871 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1872 boolvalue = FALSE;
1873 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1874 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1875 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1876 US"for boolean option ", name);
1877 }
1878
1879 /* Handle single-bit type. */
1880
1881 if (type == opt_bit)
1882 {
1883 int bit = 1 << ((ol->type >> 16) & 31);
1884 int *ptr = (data_block == NULL)?
1885 (int *)(ol->value) :
1886 (int *)((uschar *)data_block + (long int)ol->value);
1887 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1888 break;
1889 }
1890
1891 /* Handle full BOOL types */
1892
1893 if (data_block == NULL)
1894 *((BOOL *)(ol->value)) = boolvalue;
1895 else
1896 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1897
1898 /* Verify fudge */
1899
1900 if (type == opt_bool_verify)
1901 {
1902 sprintf(CS name2, "%.50s_recipient", name + offset);
1903 ol2 = find_option(name2, oltop, last);
1904 if (ol2 != NULL)
1905 {
1906 if (data_block == NULL)
1907 *((BOOL *)(ol2->value)) = boolvalue;
1908 else
1909 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1910 }
1911 }
1912
1913 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1914
1915 else if (type == opt_bool_set)
1916 {
1917 sprintf(CS name2, "*set_%.50s", name + offset);
1918 ol2 = find_option(name2, oltop, last);
1919 if (ol2 != NULL)
1920 {
1921 if (data_block == NULL)
1922 *((BOOL *)(ol2->value)) = TRUE;
1923 else
1924 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1925 }
1926 }
1927 break;
1928
1929 /* Octal integer */
1930
1931 case opt_octint:
1932 intbase = 8;
1933 inttype = US"octal ";
1934
1935 /* Integer: a simple(ish) case; allow octal and hex formats, and
1936 suffixes K and M. The different types affect output, not input. */
1937
1938 case opt_mkint:
1939 case opt_int:
1940 {
1941 uschar *endptr;
1942 long int lvalue;
1943
1944 errno = 0;
1945 lvalue = strtol(CS s, CSS &endptr, intbase);
1946
1947 if (endptr == s)
1948 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1949 inttype, name);
1950
1951 if (errno != ERANGE)
1952 {
1953 if (tolower(*endptr) == 'k')
1954 {
1955 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1956 else lvalue *= 1024;
1957 endptr++;
1958 }
1959 else if (tolower(*endptr) == 'm')
1960 {
1961 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1962 errno = ERANGE;
1963 else lvalue *= 1024*1024;
1964 endptr++;
1965 }
1966 }
1967
1968 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1969 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1970 "absolute value of integer \"%s\" is too large (overflow)", s);
1971
1972 while (isspace(*endptr)) endptr++;
1973 if (*endptr != 0)
1974 extra_chars_error(endptr, inttype, US"integer value for ", name);
1975
1976 value = (int)lvalue;
1977 }
1978
1979 if (data_block == NULL)
1980 *((int *)(ol->value)) = value;
1981 else
1982 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1983 break;
1984
1985 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1986 M. */
1987
1988 case opt_Kint:
1989 {
1990 uschar *endptr;
1991 errno = 0;
1992 value = strtol(CS s, CSS &endptr, intbase);
1993
1994 if (endptr == s)
1995 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1996 inttype, name);
1997
1998 if (errno != ERANGE)
1999 {
2000 if (tolower(*endptr) == 'm')
2001 {
2002 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
2003 else value *= 1024;
2004 endptr++;
2005 }
2006 else if (tolower(*endptr) == 'k')
2007 {
2008 endptr++;
2009 }
2010 else
2011 {
2012 value = (value + 512)/1024;
2013 }
2014 }
2015
2016 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2017 "absolute value of integer \"%s\" is too large (overflow)", s);
2018
2019 while (isspace(*endptr)) endptr++;
2020 if (*endptr != 0)
2021 extra_chars_error(endptr, inttype, US"integer value for ", name);
2022 }
2023
2024 if (data_block == NULL)
2025 *((int *)(ol->value)) = value;
2026 else
2027 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2028 break;
2029
2030 /* Fixed-point number: held to 3 decimal places. */
2031
2032 case opt_fixed:
2033 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2034 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2035 "fixed-point number expected for %s", name);
2036
2037 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2038 "integer \"%s\" is too large (overflow)", s);
2039
2040 value *= 1000;
2041
2042 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2043 "integer \"%s\" is too large (overflow)", s);
2044
2045 if (s[count] == '.')
2046 {
2047 int d = 100;
2048 while (isdigit(s[++count]))
2049 {
2050 value += (s[count] - '0') * d;
2051 d /= 10;
2052 }
2053 }
2054
2055 while (isspace(s[count])) count++;
2056
2057 if (s[count] != 0)
2058 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2059
2060 if (data_block == NULL)
2061 *((int *)(ol->value)) = value;
2062 else
2063 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2064 break;
2065
2066 /* There's a special routine to read time values. */
2067
2068 case opt_time:
2069 value = readconf_readtime(s, 0, FALSE);
2070 if (value < 0)
2071 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2072 name);
2073 if (data_block == NULL)
2074 *((int *)(ol->value)) = value;
2075 else
2076 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2077 break;
2078
2079 /* A time list is a list of colon-separated times, with the first
2080 element holding the size of the list and the second the number of
2081 entries used. */
2082
2083 case opt_timelist:
2084 {
2085 int count = 0;
2086 int *list = (data_block == NULL)?
2087 (int *)(ol->value) :
2088 (int *)((uschar *)data_block + (long int)(ol->value));
2089
2090 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2091 {
2092 int terminator = 0;
2093 uschar *snext = Ustrchr(s, ':');
2094 if (snext != NULL)
2095 {
2096 uschar *ss = snext;
2097 while (ss > s && isspace(ss[-1])) ss--;
2098 terminator = *ss;
2099 }
2100 value = readconf_readtime(s, terminator, FALSE);
2101 if (value < 0)
2102 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2103 name);
2104 if (count > 1 && value <= list[count])
2105 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2106 "time value out of order for %s", name);
2107 list[count+1] = value;
2108 if (snext == NULL) break;
2109 s = snext + 1;
2110 while (isspace(*s)) s++;
2111 }
2112
2113 if (count > list[0] - 2)
2114 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2115 name);
2116 if (count > 0 && list[2] == 0) count = 0;
2117 list[1] = count;
2118 }
2119
2120 break;
2121 }
2122
2123 return TRUE;
2124 }
2125
2126
2127
2128 /*************************************************
2129 * Print a time value *
2130 *************************************************/
2131
2132 /*
2133 Argument: a time value in seconds
2134 Returns: pointer to a fixed buffer containing the time as a string,
2135 in readconf_readtime() format
2136 */
2137
2138 uschar *
2139 readconf_printtime(int t)
2140 {
2141 int s, m, h, d, w;
2142 uschar *p = time_buffer;
2143
2144 if (t < 0)
2145 {
2146 *p++ = '-';
2147 t = -t;
2148 }
2149
2150 s = t % 60;
2151 t /= 60;
2152 m = t % 60;
2153 t /= 60;
2154 h = t % 24;
2155 t /= 24;
2156 d = t % 7;
2157 w = t/7;
2158
2159 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2160 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2161 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2162 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2163 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2164
2165 return time_buffer;
2166 }
2167
2168
2169
2170 /*************************************************
2171 * Print an individual option value *
2172 *************************************************/
2173
2174 /* This is used by the -bP option, so prints to the standard output.
2175 The entire options list is passed in as an argument, because some options come
2176 in pairs - typically uid/gid settings, which can either be explicit numerical
2177 values, or strings to be expanded later. If the numerical value is unset,
2178 search for "*expand_<name>" to see if there is a string equivalent.
2179
2180 Arguments:
2181 ol option entry, or NULL for an unknown option
2182 name option name
2183 options_block NULL for main configuration options; otherwise points to
2184 a driver block; if the option doesn't have opt_public
2185 set, then options_block->options_block is where the item
2186 resides.
2187 oltop points to the option list in which ol exists
2188 last one more than the offset of the last entry in optop
2189 no_labels do not show "foo = " at the start.
2190
2191 Returns: nothing
2192 */
2193
2194 static void
2195 print_ol(optionlist *ol, uschar *name, void *options_block,
2196 optionlist *oltop, int last, BOOL no_labels)
2197 {
2198 struct passwd *pw;
2199 struct group *gr;
2200 optionlist *ol2;
2201 void *value;
2202 uid_t *uidlist;
2203 gid_t *gidlist;
2204 uschar *s;
2205 uschar name2[64];
2206
2207 if (ol == NULL)
2208 {
2209 printf("%s is not a known option\n", name);
2210 return;
2211 }
2212
2213 /* Non-admin callers cannot see options that have been flagged secure by the
2214 "hide" prefix. */
2215
2216 if (!admin_user && (ol->type & opt_secure) != 0)
2217 {
2218 const char * const hidden = "<value not displayable>";
2219 if (no_labels)
2220 printf("%s\n", hidden);
2221 else
2222 printf("%s = %s\n", name, hidden);
2223 return;
2224 }
2225
2226 /* Else show the value of the option */
2227
2228 value = ol->value;
2229 if (options_block != NULL)
2230 {
2231 if ((ol->type & opt_public) == 0)
2232 options_block = (void *)(((driver_instance *)options_block)->options_block);
2233 value = (void *)((uschar *)options_block + (long int)value);
2234 }
2235
2236 switch(ol->type & opt_mask)
2237 {
2238 case opt_stringptr:
2239 case opt_rewrite: /* Show the text value */
2240 s = *((uschar **)value);
2241 if (!no_labels) printf("%s = ", name);
2242 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2243 break;
2244
2245 case opt_int:
2246 if (!no_labels) printf("%s = ", name);
2247 printf("%d\n", *((int *)value));
2248 break;
2249
2250 case opt_mkint:
2251 {
2252 int x = *((int *)value);
2253 if (x != 0 && (x & 1023) == 0)
2254 {
2255 int c = 'K';
2256 x >>= 10;
2257 if ((x & 1023) == 0)
2258 {
2259 c = 'M';
2260 x >>= 10;
2261 }
2262 if (!no_labels) printf("%s = ", name);
2263 printf("%d%c\n", x, c);
2264 }
2265 else
2266 {
2267 if (!no_labels) printf("%s = ", name);
2268 printf("%d\n", x);
2269 }
2270 }
2271 break;
2272
2273 case opt_Kint:
2274 {
2275 int x = *((int *)value);
2276 if (!no_labels) printf("%s = ", name);
2277 if (x == 0) printf("0\n");
2278 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2279 else printf("%dK\n", x);
2280 }
2281 break;
2282
2283 case opt_octint:
2284 if (!no_labels) printf("%s = ", name);
2285 printf("%#o\n", *((int *)value));
2286 break;
2287
2288 /* Can be negative only when "unset", in which case integer */
2289
2290 case opt_fixed:
2291 {
2292 int x = *((int *)value);
2293 int f = x % 1000;
2294 int d = 100;
2295 if (x < 0) printf("%s =\n", name); else
2296 {
2297 if (!no_labels) printf("%s = ", name);
2298 printf("%d.", x/1000);
2299 do
2300 {
2301 printf("%d", f/d);
2302 f %= d;
2303 d /= 10;
2304 }
2305 while (f != 0);
2306 printf("\n");
2307 }
2308 }
2309 break;
2310
2311 /* If the numerical value is unset, try for the string value */
2312
2313 case opt_expand_uid:
2314 if (! *get_set_flag(name, oltop, last, options_block))
2315 {
2316 sprintf(CS name2, "*expand_%.50s", name);
2317 ol2 = find_option(name2, oltop, last);
2318 if (ol2 != NULL)
2319 {
2320 void *value2 = ol2->value;
2321 if (options_block != NULL)
2322 value2 = (void *)((uschar *)options_block + (long int)value2);
2323 s = *((uschar **)value2);
2324 if (!no_labels) printf("%s = ", name);
2325 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2326 break;
2327 }
2328 }
2329
2330 /* Else fall through */
2331
2332 case opt_uid:
2333 if (!no_labels) printf("%s = ", name);
2334 if (! *get_set_flag(name, oltop, last, options_block))
2335 printf("\n");
2336 else
2337 {
2338 pw = getpwuid(*((uid_t *)value));
2339 if (pw == NULL)
2340 printf("%ld\n", (long int)(*((uid_t *)value)));
2341 else printf("%s\n", pw->pw_name);
2342 }
2343 break;
2344
2345 /* If the numerical value is unset, try for the string value */
2346
2347 case opt_expand_gid:
2348 if (! *get_set_flag(name, oltop, last, options_block))
2349 {
2350 sprintf(CS name2, "*expand_%.50s", name);
2351 ol2 = find_option(name2, oltop, last);
2352 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2353 {
2354 void *value2 = ol2->value;
2355 if (options_block != NULL)
2356 value2 = (void *)((uschar *)options_block + (long int)value2);
2357 s = *((uschar **)value2);
2358 if (!no_labels) printf("%s = ", name);
2359 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2360 break;
2361 }
2362 }
2363
2364 /* Else fall through */
2365
2366 case opt_gid:
2367 if (!no_labels) printf("%s = ", name);
2368 if (! *get_set_flag(name, oltop, last, options_block))
2369 printf("\n");
2370 else
2371 {
2372 gr = getgrgid(*((int *)value));
2373 if (gr == NULL)
2374 printf("%ld\n", (long int)(*((int *)value)));
2375 else printf("%s\n", gr->gr_name);
2376 }
2377 break;
2378
2379 case opt_uidlist:
2380 uidlist = *((uid_t **)value);
2381 if (!no_labels) printf("%s =", name);
2382 if (uidlist != NULL)
2383 {
2384 int i;
2385 uschar sep = ' ';
2386 if (no_labels) sep = '\0';
2387 for (i = 1; i <= (int)(uidlist[0]); i++)
2388 {
2389 uschar *name = NULL;
2390 pw = getpwuid(uidlist[i]);
2391 if (pw != NULL) name = US pw->pw_name;
2392 if (sep != '\0') printf("%c", sep);
2393 if (name != NULL) printf("%s", name);
2394 else printf("%ld", (long int)(uidlist[i]));
2395 sep = ':';
2396 }
2397 }
2398 printf("\n");
2399 break;
2400
2401 case opt_gidlist:
2402 gidlist = *((gid_t **)value);
2403 if (!no_labels) printf("%s =", name);
2404 if (gidlist != NULL)
2405 {
2406 int i;
2407 uschar sep = ' ';
2408 if (no_labels) sep = '\0';
2409 for (i = 1; i <= (int)(gidlist[0]); i++)
2410 {
2411 uschar *name = NULL;
2412 gr = getgrgid(gidlist[i]);
2413 if (gr != NULL) name = US gr->gr_name;
2414 if (sep != '\0') printf("%c", sep);
2415 if (name != NULL) printf("%s", name);
2416 else printf("%ld", (long int)(gidlist[i]));
2417 sep = ':';
2418 }
2419 }
2420 printf("\n");
2421 break;
2422
2423 case opt_time:
2424 if (!no_labels) printf("%s = ", name);
2425 printf("%s\n", readconf_printtime(*((int *)value)));
2426 break;
2427
2428 case opt_timelist:
2429 {
2430 int i;
2431 int *list = (int *)value;
2432 if (!no_labels) printf("%s = ", name);
2433 for (i = 0; i < list[1]; i++)
2434 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2435 printf("\n");
2436 }
2437 break;
2438
2439 case opt_bit:
2440 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2441 "" : "no_", name);
2442 break;
2443
2444 case opt_expand_bool:
2445 sprintf(CS name2, "*expand_%.50s", name);
2446 ol2 = find_option(name2, oltop, last);
2447 if (ol2 != NULL && ol2->value != NULL)
2448 {
2449 void *value2 = ol2->value;
2450 if (options_block != NULL)
2451 value2 = (void *)((uschar *)options_block + (long int)value2);
2452 s = *((uschar **)value2);
2453 if (s != NULL)
2454 {
2455 if (!no_labels) printf("%s = ", name);
2456 printf("%s\n", string_printing(s));
2457 break;
2458 }
2459 /* s == NULL => string not set; fall through */
2460 }
2461
2462 /* Fall through */
2463
2464 case opt_bool:
2465 case opt_bool_verify:
2466 case opt_bool_set:
2467 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2468 break;
2469 }
2470 }
2471
2472
2473
2474 /*************************************************
2475 * Print value from main configuration *
2476 *************************************************/
2477
2478 /* This function, called as a result of encountering the -bP option,
2479 causes the value of any main configuration variable to be output if the
2480 second argument is NULL. There are some special values:
2481
2482 all print all main configuration options
2483 configure_file print the name of the configuration file
2484 routers print the routers' configurations
2485 transports print the transports' configuration
2486 authenticators print the authenticators' configuration
2487 macros print the macros' configuration
2488 router_list print a list of router names
2489 transport_list print a list of transport names
2490 authenticator_list print a list of authentication mechanism names
2491 macro_list print a list of macro names
2492 +name print a named list item
2493 local_scan print the local_scan options
2494 environment print the used execution environment
2495
2496 If the second argument is not NULL, it must be one of "router", "transport",
2497 "authenticator" or "macro" in which case the first argument identifies the
2498 driver whose options are to be printed.
2499
2500 Arguments:
2501 name option name if type == NULL; else driver name
2502 type NULL or driver type name, as described above
2503 no_labels avoid the "foo = " at the start of an item
2504
2505 Returns: nothing
2506 */
2507
2508 void
2509 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2510 {
2511 BOOL names_only = FALSE;
2512 optionlist *ol;
2513 optionlist *ol2 = NULL;
2514 driver_instance *d = NULL;
2515 macro_item *m;
2516 int size = 0;
2517
2518 if (type == NULL)
2519 {
2520 if (*name == '+')
2521 {
2522 int i;
2523 tree_node *t;
2524 BOOL found = FALSE;
2525 static uschar *types[] = { US"address", US"domain", US"host",
2526 US"localpart" };
2527 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2528 &hostlist_anchor, &localpartlist_anchor };
2529
2530 for (i = 0; i < 4; i++)
2531 {
2532 t = tree_search(*(anchors[i]), name+1);
2533 if (t != NULL)
2534 {
2535 found = TRUE;
2536 if (no_labels)
2537 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2538 else
2539 printf("%slist %s = %s\n", types[i], name+1,
2540 ((namedlist_block *)(t->data.ptr))->string);
2541 }
2542 }
2543
2544 if (!found)
2545 printf("no address, domain, host, or local part list called \"%s\" "
2546 "exists\n", name+1);
2547
2548 return;
2549 }
2550
2551 if (Ustrcmp(name, "configure_file") == 0)
2552 {
2553 printf("%s\n", CS config_main_filename);
2554 return;
2555 }
2556
2557 if (Ustrcmp(name, "all") == 0)
2558 {
2559 for (ol = optionlist_config;
2560 ol < optionlist_config + optionlist_config_size; ol++)
2561 {
2562 if ((ol->type & opt_hidden) == 0)
2563 print_ol(ol, US ol->name, NULL,
2564 optionlist_config, optionlist_config_size,
2565 no_labels);
2566 }
2567 return;
2568 }
2569
2570 if (Ustrcmp(name, "local_scan") == 0)
2571 {
2572 #ifndef LOCAL_SCAN_HAS_OPTIONS
2573 printf("local_scan() options are not supported\n");
2574 #else
2575 for (ol = local_scan_options;
2576 ol < local_scan_options + local_scan_options_count; ol++)
2577 {
2578 print_ol(ol, US ol->name, NULL, local_scan_options,
2579 local_scan_options_count, no_labels);
2580 }
2581 #endif
2582 return;
2583 }
2584
2585 if (Ustrcmp(name, "routers") == 0)
2586 {
2587 type = US"router";
2588 name = NULL;
2589 }
2590 else if (Ustrcmp(name, "transports") == 0)
2591 {
2592 type = US"transport";
2593 name = NULL;
2594 }
2595
2596 else if (Ustrcmp(name, "authenticators") == 0)
2597 {
2598 type = US"authenticator";
2599 name = NULL;
2600 }
2601
2602 else if (Ustrcmp(name, "macros") == 0)
2603 {
2604 type = US"macro";
2605 name = NULL;
2606 }
2607
2608 else if (Ustrcmp(name, "router_list") == 0)
2609 {
2610 type = US"router";
2611 name = NULL;
2612 names_only = TRUE;
2613 }
2614
2615 else if (Ustrcmp(name, "transport_list") == 0)
2616 {
2617 type = US"transport";
2618 name = NULL;
2619 names_only = TRUE;
2620 }
2621
2622 else if (Ustrcmp(name, "authenticator_list") == 0)
2623 {
2624 type = US"authenticator";
2625 name = NULL;
2626 names_only = TRUE;
2627 }
2628
2629 else if (Ustrcmp(name, "macro_list") == 0)
2630 {
2631 type = US"macro";
2632 name = NULL;
2633 names_only = TRUE;
2634 }
2635
2636 else if (Ustrcmp(name, "environment") == 0)
2637 {
2638 if (environ)
2639 {
2640 uschar **p;
2641 size_t n;
2642 for (p = USS environ; *p; p++) ;
2643 n = p - USS environ;
2644 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2645
2646 for (p = USS environ; *p; p++)
2647 {
2648 if (no_labels) *(Ustrchr(*p, '=')) = '\0';
2649 puts(*p);
2650 }
2651 }
2652 return;
2653 }
2654
2655 else
2656 {
2657 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2658 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2659 return;
2660 }
2661 }
2662
2663 /* Handle the options for a router or transport. Skip options that are flagged
2664 as hidden. Some of these are options with names starting with '*', used for
2665 internal alternative representations of other options (which the printing
2666 function will sort out). Others are synonyms kept for backward compatibility.
2667 */
2668
2669 if (Ustrcmp(type, "router") == 0)
2670 {
2671 d = (driver_instance *)routers;
2672 ol2 = optionlist_routers;
2673 size = optionlist_routers_size;
2674 }
2675 else if (Ustrcmp(type, "transport") == 0)
2676 {
2677 d = (driver_instance *)transports;
2678 ol2 = optionlist_transports;
2679 size = optionlist_transports_size;
2680 }
2681 else if (Ustrcmp(type, "authenticator") == 0)
2682 {
2683 d = (driver_instance *)auths;
2684 ol2 = optionlist_auths;
2685 size = optionlist_auths_size;
2686 }
2687
2688 else if (Ustrcmp(type, "macro") == 0)
2689 {
2690 /* People store passwords in macros and they were previously not available
2691 for printing. So we have an admin_users restriction. */
2692 if (!admin_user)
2693 {
2694 fprintf(stderr, "exim: permission denied\n");
2695 exit(EXIT_FAILURE);
2696 }
2697 for (m = macros; m != NULL; m = m->next)
2698 {
2699 if (name == NULL || Ustrcmp(name, m->name) == 0)
2700 {
2701 if (names_only)
2702 printf("%s\n", CS m->name);
2703 else
2704 printf("%s=%s\n", CS m->name, CS m->replacement);
2705 if (name != NULL)
2706 return;
2707 }
2708 }
2709 if (name != NULL)
2710 printf("%s %s not found\n", type, name);
2711 return;
2712 }
2713
2714 if (names_only)
2715 {
2716 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2717 return;
2718 }
2719
2720 /* Either search for a given driver, or print all of them */
2721
2722 for (; d != NULL; d = d->next)
2723 {
2724 if (name == NULL)
2725 printf("\n%s %s:\n", d->name, type);
2726 else if (Ustrcmp(d->name, name) != 0) continue;
2727
2728 for (ol = ol2; ol < ol2 + size; ol++)
2729 {
2730 if ((ol->type & opt_hidden) == 0)
2731 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2732 }
2733
2734 for (ol = d->info->options;
2735 ol < d->info->options + *(d->info->options_count); ol++)
2736 {
2737 if ((ol->type & opt_hidden) == 0)
2738 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2739 }
2740 if (name != NULL) return;
2741 }
2742 if (name != NULL) printf("%s %s not found\n", type, name);
2743 }
2744
2745
2746
2747 /*************************************************
2748 * Read a named list item *
2749 *************************************************/
2750
2751 /* This function reads a name and a list (i.e. string). The name is used to
2752 save the list in a tree, sorted by its name. Each entry also has a number,
2753 which can be used for caching tests, but if the string contains any expansion
2754 items other than $key, the number is set negative to inhibit caching. This
2755 mechanism is used for domain, host, and address lists that are referenced by
2756 the "+name" syntax.
2757
2758 Arguments:
2759 anchorp points to the tree anchor
2760 numberp points to the current number for this tree
2761 max the maximum number permitted
2762 s the text of the option line, starting immediately after the name
2763 of the list type
2764 tname the name of the list type, for messages
2765
2766 Returns: nothing
2767 */
2768
2769 static void
2770 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2771 uschar *tname)
2772 {
2773 BOOL forcecache = FALSE;
2774 uschar *ss;
2775 tree_node *t;
2776 namedlist_block *nb = store_get(sizeof(namedlist_block));
2777
2778 if (Ustrncmp(s, "_cache", 6) == 0)
2779 {
2780 forcecache = TRUE;
2781 s += 6;
2782 }
2783
2784 if (!isspace(*s))
2785 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2786
2787 if (*numberp >= max)
2788 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2789 tname, max);
2790
2791 while (isspace(*s)) s++;
2792 ss = s;
2793 while (isalnum(*s) || *s == '_') s++;
2794 t = store_get(sizeof(tree_node) + s-ss);
2795 Ustrncpy(t->name, ss, s-ss);
2796 t->name[s-ss] = 0;
2797 while (isspace(*s)) s++;
2798
2799 if (!tree_insertnode(anchorp, t))
2800 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2801 "duplicate name \"%s\" for a named %s", t->name, tname);
2802
2803 t->data.ptr = nb;
2804 nb->number = *numberp;
2805 *numberp += 1;
2806
2807 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2808 "missing '=' after \"%s\"", t->name);
2809 while (isspace(*s)) s++;
2810 nb->string = read_string(s, t->name);
2811 nb->cache_data = NULL;
2812
2813 /* Check the string for any expansions; if any are found, mark this list
2814 uncacheable unless the user has explicited forced caching. */
2815
2816 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2817 }
2818
2819
2820
2821
2822 /*************************************************
2823 * Unpick data for a rate limit *
2824 *************************************************/
2825
2826 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2827 separate values.
2828
2829 Arguments:
2830 s string, in the form t,b,f,l
2831 where t is the threshold (integer)
2832 b is the initial delay (time)
2833 f is the multiplicative factor (fixed point)
2834 k is the maximum time (time)
2835 threshold where to store threshold
2836 base where to store base in milliseconds
2837 factor where to store factor in milliseconds
2838 limit where to store limit
2839
2840 Returns: nothing (panics on error)
2841 */
2842
2843 static void
2844 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2845 int *limit)
2846 {
2847 uschar bstring[16], lstring[16];
2848
2849 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2850 factor, lstring) == 4)
2851 {
2852 *base = readconf_readtime(bstring, 0, TRUE);
2853 *limit = readconf_readtime(lstring, 0, TRUE);
2854 if (*base >= 0 && *limit >= 0) return;
2855 }
2856 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2857 }
2858
2859
2860
2861
2862 /*************************************************
2863 * Drop privs for checking TLS config *
2864 *************************************************/
2865
2866 /* We want to validate TLS options during readconf, but do not want to be
2867 root when we call into the TLS library, in case of library linkage errors
2868 which cause segfaults; before this check, those were always done as the Exim
2869 runtime user and it makes sense to continue with that.
2870
2871 Assumes: tls_require_ciphers has been set, if it will be
2872 exim_user has been set, if it will be
2873 exim_group has been set, if it will be
2874
2875 Returns: bool for "okay"; false will cause caller to immediately exit.
2876 */
2877
2878 #ifdef SUPPORT_TLS
2879 static BOOL
2880 tls_dropprivs_validate_require_cipher(void)
2881 {
2882 const uschar *errmsg;
2883 pid_t pid;
2884 int rc, status;
2885 void (*oldsignal)(int);
2886
2887 oldsignal = signal(SIGCHLD, SIG_DFL);
2888
2889 fflush(NULL);
2890 if ((pid = fork()) < 0)
2891 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2892
2893 if (pid == 0)
2894 {
2895 /* in some modes, will have dropped privilege already */
2896 if (!geteuid())
2897 exim_setugid(exim_uid, exim_gid, FALSE,
2898 US"calling tls_validate_require_cipher");
2899
2900 errmsg = tls_validate_require_cipher();
2901 if (errmsg)
2902 {
2903 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2904 "tls_require_ciphers invalid: %s", errmsg);
2905 }
2906 fflush(NULL);
2907 _exit(0);
2908 }
2909
2910 do {
2911 rc = waitpid(pid, &status, 0);
2912 } while (rc < 0 && errno == EINTR);
2913
2914 DEBUG(D_tls)
2915 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2916 (int)pid, status);
2917
2918 signal(SIGCHLD, oldsignal);
2919
2920 return status == 0;
2921 }
2922 #endif /* SUPPORT_TLS */
2923
2924
2925
2926
2927 /*************************************************
2928 * Read main configuration options *
2929 *************************************************/
2930
2931 /* This function is the first to be called for configuration reading. It
2932 opens the configuration file and reads general configuration settings until
2933 it reaches the end of the configuration section. The file is then left open so
2934 that the remaining configuration data can subsequently be read if needed for
2935 this run of Exim.
2936
2937 The configuration file must be owned either by root or exim, and be writeable
2938 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2939 in the config file, so the test is done on the compiled in values. A slight
2940 anomaly, to be carefully documented.
2941
2942 The name of the configuration file is taken from a list that is included in the
2943 binary of Exim. It can be altered from the command line, but if that is done,
2944 root privilege is immediately withdrawn unless the caller is root or exim.
2945 The first file on the list that exists is used.
2946
2947 For use on multiple systems that share file systems, first look for a
2948 configuration file whose name has the current node name on the end. If that is
2949 not found, try the generic name. For really contorted configurations, that run
2950 multiple Exims with different uid settings, first try adding the effective uid
2951 before the node name. These complications are going to waste resources on most
2952 systems. Therefore they are available only when requested by compile-time
2953 options. */
2954
2955 void
2956 readconf_main(void)
2957 {
2958 int sep = 0;
2959 struct stat statbuf;
2960 uschar *s, *filename;
2961 uschar *list = config_main_filelist;
2962
2963 /* Loop through the possible file names */
2964
2965 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2966 != NULL)
2967 {
2968
2969 /* To avoid confusion: Exim changes to / at the very beginning and
2970 * and to $spool_directory later. */
2971 if (filename[0] != '/')
2972 {
2973 fprintf(stderr, "-C %s: only absolute names are allowed\n", filename);
2974 exit(EXIT_FAILURE);
2975 }
2976
2977 /* Cut out all the fancy processing unless specifically wanted */
2978
2979 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2980 uschar *suffix = filename + Ustrlen(filename);
2981
2982 /* Try for the node-specific file if a node name exists */
2983
2984 #ifdef CONFIGURE_FILE_USE_NODE
2985 struct utsname uts;
2986 if (uname(&uts) >= 0)
2987 {
2988 #ifdef CONFIGURE_FILE_USE_EUID
2989 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2990 config_file = Ufopen(filename, "rb");
2991 if (config_file == NULL)
2992 #endif /* CONFIGURE_FILE_USE_EUID */
2993 {
2994 sprintf(CS suffix, ".%.256s", uts.nodename);
2995 config_file = Ufopen(filename, "rb");
2996 }
2997 }
2998 #endif /* CONFIGURE_FILE_USE_NODE */
2999
3000 /* Otherwise, try the generic name, possibly with the euid added */
3001
3002 #ifdef CONFIGURE_FILE_USE_EUID
3003 if (config_file == NULL)
3004 {
3005 sprintf(CS suffix, ".%ld", (long int)original_euid);
3006 config_file = Ufopen(filename, "rb");
3007 }
3008 #endif /* CONFIGURE_FILE_USE_EUID */
3009
3010 /* Finally, try the unadorned name */
3011
3012 if (config_file == NULL)
3013 {
3014 *suffix = 0;
3015 config_file = Ufopen(filename, "rb");
3016 }
3017 #else /* if neither defined */
3018
3019 /* This is the common case when the fancy processing is not included. */
3020
3021 config_file = Ufopen(filename, "rb");
3022 #endif
3023
3024 /* If the file does not exist, continue to try any others. For any other
3025 error, break out (and die). */
3026
3027 if (config_file != NULL || errno != ENOENT) break;
3028 }
3029
3030 /* On success, save the name for verification; config_filename is used when
3031 logging configuration errors (it changes for .included files) whereas
3032 config_main_filename is the name shown by -bP. Failure to open a configuration
3033 file is a serious disaster. */
3034
3035 if (config_file != NULL)
3036 {
3037 config_filename = config_main_filename = string_copy(filename);
3038 }
3039 else
3040 {
3041 if (filename == NULL)
3042 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3043 "%s", config_main_filelist);
3044 else
3045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3046 "configuration file %s", filename));
3047 }
3048
3049 /* Check the status of the file we have opened, if we have retained root
3050 privileges and the file isn't /dev/null (which *should* be 0666). */
3051
3052 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3053 {
3054 if (fstat(fileno(config_file), &statbuf) != 0)
3055 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3056 big_buffer);
3057
3058 if ((statbuf.st_uid != root_uid /* owner not root */
3059 #ifdef CONFIGURE_OWNER
3060 && statbuf.st_uid != config_uid /* owner not the special one */
3061 #endif
3062 ) || /* or */
3063 (statbuf.st_gid != root_gid /* group not root & */
3064 #ifdef CONFIGURE_GROUP
3065 && statbuf.st_gid != config_gid /* group not the special one */
3066 #endif
3067 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3068 /* or */
3069 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3070
3071 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3072 "wrong owner, group, or mode", big_buffer);
3073 }
3074
3075 /* Process the main configuration settings. They all begin with a lower case
3076 letter. If we see something starting with an upper case letter, it is taken as
3077 a macro definition. */
3078
3079 while ((s = get_config_line()) != NULL)
3080 {
3081 if (isupper(s[0])) read_macro_assignment(s);
3082
3083 else if (Ustrncmp(s, "domainlist", 10) == 0)
3084 read_named_list(&domainlist_anchor, &domainlist_count,
3085 MAX_NAMED_LIST, s+10, US"domain list");
3086
3087 else if (Ustrncmp(s, "hostlist", 8) == 0)
3088 read_named_list(&hostlist_anchor, &hostlist_count,
3089 MAX_NAMED_LIST, s+8, US"host list");
3090
3091 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3092 read_named_list(&addresslist_anchor, &addresslist_count,
3093 MAX_NAMED_LIST, s+11, US"address list");
3094
3095 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3096 read_named_list(&localpartlist_anchor, &localpartlist_count,
3097 MAX_NAMED_LIST, s+13, US"local part list");
3098
3099 else
3100 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3101 NULL, US"main option \"%s\" unknown");
3102 }
3103
3104
3105 /* If local_sender_retain is set, local_from_check must be unset. */
3106
3107 if (local_sender_retain && local_from_check)
3108 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3109 "local_sender_retain are set; this combination is not allowed");
3110
3111 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3112 wanted. */
3113
3114 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3115
3116 /* The max retry interval must not be greater than 24 hours. */
3117
3118 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3119
3120 /* remote_max_parallel must be > 0 */
3121
3122 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3123
3124 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3125 start of a new SMTP message. */
3126
3127 freeze_tell_config = freeze_tell;
3128
3129 /* The primary host name may be required for expansion of spool_directory
3130 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3131 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3132 canonize it. Some people like upper case letters in their host names, so we
3133 don't force the case. */
3134
3135 if (primary_hostname == NULL)
3136 {
3137 uschar *hostname;
3138 struct utsname uts;
3139 if (uname(&uts) < 0)
3140 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3141 hostname = US uts.nodename;
3142
3143 if (Ustrchr(hostname, '.') == NULL)
3144 {
3145 int af = AF_INET;
3146 struct hostent *hostdata;
3147
3148 #if HAVE_IPV6
3149 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3150 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
3151 TRUE, NULL) != OK))
3152 af = AF_INET6;
3153 #else
3154 af = AF_INET;
3155 #endif
3156
3157 for (;;)
3158 {
3159 #if HAVE_IPV6
3160 #if HAVE_GETIPNODEBYNAME
3161 int error_num;
3162 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3163 #else
3164 hostdata = gethostbyname2(CS hostname, af);
3165 #endif
3166 #else
3167 hostdata = gethostbyname(CS hostname);
3168 #endif
3169
3170 if (hostdata != NULL)
3171 {
3172 hostname = US hostdata->h_name;
3173 break;
3174 }
3175
3176 if (af == AF_INET) break;
3177 af = AF_INET;
3178 }
3179 }
3180
3181 primary_hostname = string_copy(hostname);
3182 }
3183
3184 /* Set up default value for smtp_active_hostname */
3185
3186 smtp_active_hostname = primary_hostname;
3187
3188 /* If spool_directory wasn't set in the build-time configuration, it must have
3189 got set above. Of course, writing to the log may not work if log_file_path is
3190 not set, but it will at least get to syslog or somewhere, with any luck. */
3191
3192 if (*spool_directory == 0)
3193 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3194 "proceed");
3195
3196 /* Expand the spool directory name; it may, for example, contain the primary
3197 host name. Same comment about failure. */
3198
3199 s = expand_string(spool_directory);
3200 if (s == NULL)
3201 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3202 "\"%s\": %s", spool_directory, expand_string_message);
3203 spool_directory = s;
3204
3205 /* Expand log_file_path, which must contain "%s" in any component that isn't
3206 the null string or "syslog". It is also allowed to contain one instance of %D
3207 or %M. However, it must NOT contain % followed by anything else. */
3208
3209 if (*log_file_path != 0)
3210 {
3211 uschar *ss, *sss;
3212 int sep = ':'; /* Fixed for log file path */
3213 s = expand_string(log_file_path);
3214 if (s == NULL)
3215 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3216 "\"%s\": %s", log_file_path, expand_string_message);
3217
3218 ss = s;
3219 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3220 {
3221 uschar *t;
3222 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3223 t = Ustrstr(sss, "%s");
3224 if (t == NULL)
3225 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3226 "contain \"%%s\"", sss);
3227 *t = 'X';
3228 t = Ustrchr(sss, '%');
3229 if (t != NULL)
3230 {
3231 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3232 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3233 "unexpected \"%%\" character", s);
3234 }
3235 }
3236
3237 log_file_path = s;
3238 }
3239
3240 /* Interpret syslog_facility into an integer argument for 'ident' param to
3241 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3242 leading "log_". */
3243
3244 if (syslog_facility_str != NULL)
3245 {
3246 int i;
3247 uschar *s = syslog_facility_str;
3248
3249 if ((Ustrlen(syslog_facility_str) >= 4) &&
3250 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3251 s += 4;
3252
3253 for (i = 0; i < syslog_list_size; i++)
3254 {
3255 if (strcmpic(s, syslog_list[i].name) == 0)
3256 {
3257 syslog_facility = syslog_list[i].value;
3258 break;
3259 }
3260 }
3261
3262 if (i >= syslog_list_size)
3263 {
3264 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3265 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3266 }
3267 }
3268
3269 /* Expand pid_file_path */
3270
3271 if (*pid_file_path != 0)
3272 {
3273 s = expand_string(pid_file_path);
3274 if (s == NULL)
3275 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3276 "\"%s\": %s", pid_file_path, expand_string_message);
3277 pid_file_path = s;
3278 }
3279
3280 /* Set default value of process_log_path */
3281
3282 if (process_log_path == NULL || *process_log_path =='\0')
3283 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3284
3285 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3286 message. */
3287
3288 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3289
3290 /* Unpick the SMTP rate limiting options, if set */
3291
3292 if (smtp_ratelimit_mail != NULL)
3293 {
3294 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3295 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3296 }
3297
3298 if (smtp_ratelimit_rcpt != NULL)
3299 {
3300 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3301 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3302 }
3303
3304 /* The qualify domains default to the primary host name */
3305
3306 if (qualify_domain_sender == NULL)
3307 qualify_domain_sender = primary_hostname;
3308 if (qualify_domain_recipient == NULL)
3309 qualify_domain_recipient = qualify_domain_sender;
3310
3311 /* Setting system_filter_user in the configuration sets the gid as well if a
3312 name is given, but a numerical value does not. */
3313
3314 if (system_filter_uid_set && !system_filter_gid_set)
3315 {
3316 struct passwd *pw = getpwuid(system_filter_uid);
3317 if (pw == NULL)
3318 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3319 (long int)system_filter_uid);
3320 system_filter_gid = pw->pw_gid;
3321 system_filter_gid_set = TRUE;
3322 }
3323
3324 /* If the errors_reply_to field is set, check that it is syntactically valid
3325 and ensure it contains a domain. */
3326
3327 if (errors_reply_to != NULL)
3328 {
3329 uschar *errmess;
3330 int start, end, domain;
3331 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3332 &start, &end, &domain, FALSE);
3333
3334 if (recipient == NULL)
3335 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3336 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3337
3338 if (domain == 0)
3339 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3340 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3341 }
3342
3343 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3344 smtp_accept_max must also be set. */
3345
3346 if (smtp_accept_max == 0 &&
3347 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3348 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3349 "smtp_accept_max must be set if smtp_accept_queue or "
3350 "smtp_accept_max_per_host is set");
3351
3352 /* Set up the host number if anything is specified. It is an expanded string
3353 so that it can be computed from the host name, for example. We do this last
3354 so as to ensure that everything else is set up before the expansion. */
3355
3356 if (host_number_string != NULL)
3357 {
3358 long int n;
3359 uschar *end;
3360 uschar *s = expand_string(host_number_string);
3361 if (s == NULL)
3362 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3363 "failed to expand localhost_number \"%s\": %s",
3364 host_number_string, expand_string_message);
3365 n = Ustrtol(s, &end, 0);
3366 while (isspace(*end)) end++;
3367 if (*end != 0)
3368 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3369 "localhost_number value is not a number: %s", s);
3370 if (n > LOCALHOST_MAX)
3371 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3372 "localhost_number is greater than the maximum allowed value (%d)",
3373 LOCALHOST_MAX);
3374 host_number = n;
3375 }
3376
3377 #ifdef SUPPORT_TLS
3378 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3379
3380 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3381 tls_verify_certificates == NULL)
3382 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3383 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3384 (tls_verify_hosts != NULL)? "" : "try_");
3385
3386 /* This also checks that the library linkage is working and we can call
3387 routines in it, so call even if tls_require_ciphers is unset */
3388 if (!tls_dropprivs_validate_require_cipher())
3389 exit(1);
3390
3391 /* Magic number: at time of writing, 1024 has been the long-standing value
3392 used by so many clients, and what Exim used to use always, that it makes
3393 sense to just min-clamp this max-clamp at that. */
3394 if (tls_dh_max_bits < 1024)
3395 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3396 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3397
3398 /* If openssl_options is set, validate it */
3399 if (openssl_options != NULL)
3400 {
3401 # ifdef USE_GNUTLS
3402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3403 "openssl_options is set but we're using GnuTLS");
3404 # else
3405 long dummy;
3406 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3407 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3408 "openssl_options parse error: %s", openssl_options);
3409 # endif
3410 }
3411
3412 if (gnutls_require_kx || gnutls_require_mac || gnutls_require_proto)
3413 log_write(0, LOG_MAIN, "WARNING: main options"
3414 " gnutls_require_kx, gnutls_require_mac and gnutls_require_protocols"
3415 " are obsolete\n");
3416 #endif /*SUPPORT_TLS*/
3417
3418 if ((!add_environment || *add_environment == '\0') && !keep_environment)
3419 log_write(0, LOG_MAIN,
3420 "WARNING: purging the environment.\n"
3421 " Suggested action: use keep_environment and add_environment.\n");
3422 }
3423
3424
3425
3426 /*************************************************
3427 * Initialize one driver *
3428 *************************************************/
3429
3430 /* This is called once the driver's generic options, if any, have been read.
3431 We can now find the driver, set up defaults for the private options, and
3432 unset any "set" bits in the private options table (which might have been
3433 set by another incarnation of the same driver).
3434
3435 Arguments:
3436 d pointer to driver instance block, with generic
3437 options filled in
3438 drivers_available vector of available drivers
3439 size_of_info size of each block in drivers_available
3440 class class of driver, for error message
3441
3442 Returns: pointer to the driver info block
3443 */
3444
3445 static driver_info *
3446 init_driver(driver_instance *d, driver_info *drivers_available,
3447 int size_of_info, uschar *class)
3448 {
3449 driver_info *dd;
3450
3451 for (dd = drivers_available; dd->driver_name[0] != 0;
3452 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3453 {
3454 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3455 {
3456 int i;
3457 int len = dd->options_len;
3458 d->info = dd;
3459 d->options_block = store_get(len);
3460 memcpy(d->options_block, dd->options_block, len);
3461 for (i = 0; i < *(dd->options_count); i++)
3462 dd->options[i].type &= ~opt_set;
3463 return dd;
3464 }
3465 }
3466
3467 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3468 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3469
3470 return NULL; /* never obeyed */
3471 }
3472
3473
3474
3475
3476 /*************************************************
3477 * Initialize driver list *
3478 *************************************************/
3479
3480 /* This function is called for routers, transports, and authentication
3481 mechanisms. It reads the data from the current point in the configuration file
3482 up to the end of the section, and sets up a chain of instance blocks according
3483 to the file's contents. The file will already have been opened by a call to
3484 readconf_main, and must be left open for subsequent reading of further data.
3485
3486 Any errors cause a panic crash. Note that the blocks with names driver_info and
3487 driver_instance must map the first portions of all the _info and _instance
3488 blocks for this shared code to work.
3489
3490 Arguments:
3491 class "router", "transport", or "authenticator"
3492 anchor &routers, &transports, &auths
3493 drivers_available available drivers
3494 size_of_info size of each info block
3495 instance_default points to default data for an instance
3496 instance_size size of instance block
3497 driver_optionlist generic option list
3498 driver_optionlist_count count of generic option list
3499
3500 Returns: nothing
3501 */
3502
3503 void
3504 readconf_driver_init(
3505 uschar *class,
3506 driver_instance **anchor,
3507 driver_info *drivers_available,
3508 int size_of_info,
3509 void *instance_default,
3510 int instance_size,
3511 optionlist *driver_optionlist,
3512 int driver_optionlist_count)
3513 {
3514 driver_instance **p = anchor;
3515 driver_instance *d = NULL;
3516 uschar *buffer;
3517
3518 while ((buffer = get_config_line()) != NULL)
3519 {
3520 uschar name[64];
3521 uschar *s;
3522
3523 /* Read the first name on the line and test for the start of a new driver. A
3524 macro definition indicates the end of the previous driver. If this isn't the
3525 start of a new driver, the line will be re-read. */
3526
3527 s = readconf_readname(name, sizeof(name), buffer);
3528
3529 /* Handle macro definition, first finishing off the initialization of the
3530 previous driver, if any. */
3531
3532 if (isupper(*name) && *s == '=')
3533 {
3534 if (d != NULL)
3535 {
3536 if (d->driver_name == NULL)
3537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3538 "no driver defined for %s \"%s\"", class, d->name);
3539 (d->info->init)(d);
3540 d = NULL;
3541 }
3542 read_macro_assignment(buffer);
3543 continue;
3544 }
3545
3546 /* If the line starts with a name terminated by a colon, we are at the
3547 start of the definition of a new driver. The rest of the line must be
3548 blank. */
3549
3550 if (*s++ == ':')
3551 {
3552 int i;
3553
3554 /* Finish off initializing the previous driver. */
3555
3556 if (d != NULL)
3557 {
3558 if (d->driver_name == NULL)
3559 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3560 "no driver defined for %s \"%s\"", class, d->name);
3561 (d->info->init)(d);
3562 }
3563
3564 /* Check that we haven't already got a driver of this name */
3565
3566 for (d = *anchor; d != NULL; d = d->next)
3567 if (Ustrcmp(name, d->name) == 0)
3568 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3569 "there are two %ss called \"%s\"", class, name);
3570
3571 /* Set up a new driver instance data block on the chain, with
3572 its default values installed. */
3573
3574 d = store_get(instance_size);
3575 memcpy(d, instance_default, instance_size);
3576 *p = d;
3577 p = &(d->next);
3578 d->name = string_copy(name);
3579
3580 /* Clear out the "set" bits in the generic options */
3581
3582 for (i = 0; i < driver_optionlist_count; i++)
3583 driver_optionlist[i].type &= ~opt_set;
3584
3585 /* Check nothing more on this line, then do the next loop iteration. */
3586
3587 while (isspace(*s)) s++;
3588 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3589 continue;
3590 }
3591
3592 /* Not the start of a new driver. Give an error if we have not set up a
3593 current driver yet. */
3594
3595 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3596 "%s name missing", class);
3597
3598 /* First look to see if this is a generic option; if it is "driver",
3599 initialize the driver. If is it not a generic option, we can look for a
3600 private option provided that the driver has been previously set up. */
3601
3602 if (readconf_handle_option(buffer, driver_optionlist,
3603 driver_optionlist_count, d, NULL))
3604 {
3605 if (d->info == NULL && d->driver_name != NULL)
3606 init_driver(d, drivers_available, size_of_info, class);
3607 }
3608
3609 /* Handle private options - pass the generic block because some may
3610 live therein. A flag with each option indicates if it is in the public
3611 block. */
3612
3613 else if (d->info != NULL)
3614 {
3615 readconf_handle_option(buffer, d->info->options,
3616 *(d->info->options_count), d, US"option \"%s\" unknown");
3617 }
3618
3619 /* The option is not generic and the driver name has not yet been given. */
3620
3621 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3622 "(\"driver\" must be specified before any private options)", name);
3623 }
3624
3625 /* Run the initialization function for the final driver. */
3626
3627 if (d != NULL)
3628 {
3629 if (d->driver_name == NULL)
3630 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3631 "no driver defined for %s \"%s\"", class, d->name);
3632 (d->info->init)(d);
3633 }
3634 }
3635
3636
3637
3638 /*************************************************
3639 * Check driver dependency *
3640 *************************************************/
3641
3642 /* This function is passed a driver instance and a string. It checks whether
3643 any of the string options for the driver contains the given string as an
3644 expansion variable.
3645
3646 Arguments:
3647 d points to a driver instance block
3648 s the string to search for
3649
3650 Returns: TRUE if a dependency is found
3651 */
3652
3653 BOOL
3654 readconf_depends(driver_instance *d, uschar *s)
3655 {
3656 int count = *(d->info->options_count);
3657 optionlist *ol;
3658 uschar *ss;
3659
3660 for (ol = d->info->options; ol < d->info->options + count; ol++)
3661 {
3662 void *options_block;
3663 uschar *value;
3664 int type = ol->type & opt_mask;
3665 if (type != opt_stringptr) continue;
3666 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3667 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3668 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3669 {
3670 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3671 isalnum(ss[Ustrlen(s)])) continue;
3672 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3673 d->name, ol->name, s);
3674 return TRUE;
3675 }
3676 }
3677
3678 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3679 return FALSE;
3680 }
3681
3682
3683
3684
3685 /*************************************************
3686 * Decode an error type for retries *
3687 *************************************************/
3688
3689 /* This function is global because it is also called from the main
3690 program when testing retry information. It decodes strings such as "quota_7d"
3691 into numerical error codes.
3692
3693 Arguments:
3694 pp points to start of text
3695 p points past end of text
3696 basic_errno points to an int to receive the main error number
3697 more_errno points to an int to receive the secondary error data
3698
3699 Returns: NULL if decoded correctly; else points to error text
3700 */
3701
3702 uschar *
3703 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3704 {
3705 int len;
3706 uschar *q = pp;
3707 while (q < p && *q != '_') q++;
3708 len = q - pp;
3709
3710 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3711 {
3712 *basic_errno = ERRNO_EXIMQUOTA;
3713 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3714 return US"bad time value";
3715 }
3716
3717 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3718 {
3719 *basic_errno = ECONNREFUSED;
3720 if (q != p)
3721 {
3722 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3723 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3724 else return US"A or MX expected after \"refused\"";
3725 }
3726 }
3727
3728 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3729 {
3730 *basic_errno = ETIMEDOUT;
3731 if (q != p)
3732 {
3733 int i;
3734 int xlen = p - q - 1;
3735 uschar *x = q + 1;
3736
3737 static uschar *extras[] =
3738 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3739 static int values[] =
3740 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3741
3742 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3743 {
3744 if (strncmpic(x, extras[i], xlen) == 0)
3745 {
3746 *more_errno = values[i];
3747 break;
3748 }
3749 }
3750
3751 if (i >= sizeof(extras)/sizeof(uschar *))
3752 {
3753 if (strncmpic(x, US"DNS", xlen) == 0)
3754 {
3755 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3756 "available in retry rules (it has never worked) - treated as "
3757 "\"timeout\"");
3758 }
3759 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3760 }
3761 }
3762 }
3763
3764 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3765 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3766 strncmpic(pp, US"data_4", 6) == 0)
3767 {
3768 BOOL bad = FALSE;
3769 int x = 255; /* means "any 4xx code" */
3770 if (p != pp + 8) bad = TRUE; else
3771 {
3