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[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
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 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 static void save_config_line(const uschar* line);
18 static void save_config_position(const uschar *file, int line);
19 static void print_config(BOOL admin, BOOL terse);
20
21
22 #define CSTATE_STACK_SIZE 10
23
24
25 /* Structure for chain (stack) of .included files */
26
27 typedef struct config_file_item {
28 struct config_file_item *next;
29 uschar *filename;
30 FILE *file;
31 int lineno;
32 } config_file_item;
33
34 /* Structure for chain of configuration lines (-bP config) */
35
36 typedef struct config_line_item {
37 struct config_line_item *next;
38 uschar *line;
39 } config_line_item;
40
41 static config_line_item* config_lines;
42
43 /* Structure of table of conditional words and their state transitions */
44
45 typedef struct cond_item {
46 uschar *name;
47 int namelen;
48 int action1;
49 int action2;
50 int pushpop;
51 } cond_item;
52
53 /* Structure of table of syslog facility names and values */
54
55 typedef struct syslog_fac_item {
56 uschar *name;
57 int value;
58 } syslog_fac_item;
59
60 /* constants */
61 static const char * const hidden = "<value not displayable>";
62
63 /* Static variables */
64
65 static config_file_item *config_file_stack = NULL; /* For includes */
66
67 static uschar *syslog_facility_str = NULL;
68 static uschar next_section[24];
69 static uschar time_buffer[24];
70
71 /* State variables for conditional loading (.ifdef / .else / .endif) */
72
73 static int cstate = 0;
74 static int cstate_stack_ptr = -1;
75 static int cstate_stack[CSTATE_STACK_SIZE];
76
77 /* Table of state transitions for handling conditional inclusions. There are
78 four possible state transitions:
79
80 .ifdef true
81 .ifdef false
82 .elifdef true (or .else)
83 .elifdef false
84
85 .endif just causes the previous cstate to be popped off the stack */
86
87 static int next_cstate[3][4] =
88 {
89 /* State 0: reading from file, or reading until next .else or .endif */
90 { 0, 1, 2, 2 },
91 /* State 1: condition failed, skipping until next .else or .endif */
92 { 2, 2, 0, 1 },
93 /* State 2: skipping until .endif */
94 { 2, 2, 2, 2 },
95 };
96
97 /* Table of conditionals and the states to set. For each name, there are four
98 values: the length of the name (to save computing it each time), the state to
99 set if a macro was found in the line, the state to set if a macro was not found
100 in the line, and a stack manipulation setting which is:
101
102 -1 pull state value off the stack
103 0 don't alter the stack
104 +1 push value onto stack, before setting new state
105 */
106
107 static cond_item cond_list[] = {
108 { US"ifdef", 5, 0, 1, 1 },
109 { US"ifndef", 6, 1, 0, 1 },
110 { US"elifdef", 7, 2, 3, 0 },
111 { US"elifndef", 8, 3, 2, 0 },
112 { US"else", 4, 2, 2, 0 },
113 { US"endif", 5, 0, 0, -1 }
114 };
115
116 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
117
118 /* Table of syslog facility names and their values */
119
120 static syslog_fac_item syslog_list[] = {
121 { US"mail", LOG_MAIL },
122 { US"user", LOG_USER },
123 { US"news", LOG_NEWS },
124 { US"uucp", LOG_UUCP },
125 { US"local0", LOG_LOCAL0 },
126 { US"local1", LOG_LOCAL1 },
127 { US"local2", LOG_LOCAL2 },
128 { US"local3", LOG_LOCAL3 },
129 { US"local4", LOG_LOCAL4 },
130 { US"local5", LOG_LOCAL5 },
131 { US"local6", LOG_LOCAL6 },
132 { US"local7", LOG_LOCAL7 },
133 { US"daemon", LOG_DAEMON }
134 };
135
136 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
137
138
139
140
141 /*************************************************
142 * Main configuration options *
143 *************************************************/
144
145 /* The list of options that can be set in the main configuration file. This
146 must be in alphabetic order because it is searched by binary chop. */
147
148 static optionlist optionlist_config[] = {
149 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
150 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
151 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
152 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
153 { "accept_8bitmime", opt_bool, &accept_8bitmime },
154 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
155 #ifdef WITH_CONTENT_SCAN
156 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
157 #endif
158 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
159 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
160 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
161 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
162 #ifndef DISABLE_PRDR
163 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
164 #endif
165 #ifndef DISABLE_DKIM
166 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
167 #endif
168 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
169 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
170 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
171 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
172 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
173 #ifdef WITH_CONTENT_SCAN
174 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
175 #endif
176 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
177 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
178 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
179 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
180 #ifdef SUPPORT_TLS
181 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
182 #endif
183 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
184 { "add_environment", opt_stringptr, &add_environment },
185 { "admin_groups", opt_gidlist, &admin_groups },
186 { "allow_domain_literals", opt_bool, &allow_domain_literals },
187 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
188 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
189 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
190 { "auto_thaw", opt_time, &auto_thaw },
191 #ifdef WITH_CONTENT_SCAN
192 { "av_scanner", opt_stringptr, &av_scanner },
193 #endif
194 { "bi_command", opt_stringptr, &bi_command },
195 #ifdef EXPERIMENTAL_BRIGHTMAIL
196 { "bmi_config_file", opt_stringptr, &bmi_config_file },
197 #endif
198 { "bounce_message_file", opt_stringptr, &bounce_message_file },
199 { "bounce_message_text", opt_stringptr, &bounce_message_text },
200 { "bounce_return_body", opt_bool, &bounce_return_body },
201 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
202 { "bounce_return_message", opt_bool, &bounce_return_message },
203 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
204 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
205 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
206 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
207 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
208 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
209 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
210 { "check_log_inodes", opt_int, &check_log_inodes },
211 { "check_log_space", opt_Kint, &check_log_space },
212 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
213 { "check_spool_inodes", opt_int, &check_spool_inodes },
214 { "check_spool_space", opt_Kint, &check_spool_space },
215 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
216 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
217 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
218 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
219 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
220 #ifdef EXPERIMENTAL_DCC
221 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
222 { "dccifd_address", opt_stringptr, &dccifd_address },
223 { "dccifd_options", opt_stringptr, &dccifd_options },
224 #endif
225 { "delay_warning", opt_timelist, &delay_warning },
226 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
227 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
228 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
229 { "delivery_date_remove", opt_bool, &delivery_date_remove },
230 #ifdef ENABLE_DISABLE_FSYNC
231 { "disable_fsync", opt_bool, &disable_fsync },
232 #endif
233 { "disable_ipv6", opt_bool, &disable_ipv6 },
234 #ifndef DISABLE_DKIM
235 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
236 #endif
237 #ifdef EXPERIMENTAL_DMARC
238 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
239 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
240 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
241 #endif
242 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
243 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
244 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
245 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
246 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
247 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
248 { "dns_retrans", opt_time, &dns_retrans },
249 { "dns_retry", opt_int, &dns_retry },
250 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
251 { "dns_use_edns0", opt_int, &dns_use_edns0 },
252 /* This option is now a no-op, retained for compability */
253 { "drop_cr", opt_bool, &drop_cr },
254 /*********************************************************/
255 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
256 { "dsn_from", opt_stringptr, &dsn_from },
257 { "envelope_to_remove", opt_bool, &envelope_to_remove },
258 { "errors_copy", opt_stringptr, &errors_copy },
259 { "errors_reply_to", opt_stringptr, &errors_reply_to },
260 #ifndef DISABLE_EVENT
261 { "event_action", opt_stringptr, &event_action },
262 #endif
263 { "exim_group", opt_gid, &exim_gid },
264 { "exim_path", opt_stringptr, &exim_path },
265 { "exim_user", opt_uid, &exim_uid },
266 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
267 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
268 { "finduser_retries", opt_int, &finduser_retries },
269 { "freeze_tell", opt_stringptr, &freeze_tell },
270 { "gecos_name", opt_stringptr, &gecos_name },
271 { "gecos_pattern", opt_stringptr, &gecos_pattern },
272 #ifdef SUPPORT_TLS
273 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
274 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
275 #endif
276 { "header_line_maxsize", opt_int, &header_line_maxsize },
277 { "header_maxsize", opt_int, &header_maxsize },
278 { "headers_charset", opt_stringptr, &headers_charset },
279 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
280 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
281 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
282 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
283 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
284 { "hold_domains", opt_stringptr, &hold_domains },
285 { "host_lookup", opt_stringptr, &host_lookup },
286 { "host_lookup_order", opt_stringptr, &host_lookup_order },
287 { "host_reject_connection", opt_stringptr, &host_reject_connection },
288 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
289 #ifdef SUPPORT_PROXY
290 { "hosts_proxy", opt_stringptr, &hosts_proxy },
291 #endif
292 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
293 #ifdef LOOKUP_IBASE
294 { "ibase_servers", opt_stringptr, &ibase_servers },
295 #endif
296 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
297 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
298 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
299 { "keep_environment", opt_stringptr, &keep_environment },
300 { "keep_malformed", opt_time, &keep_malformed },
301 #ifdef LOOKUP_LDAP
302 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
303 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
304 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
305 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
306 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
307 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
308 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
309 { "ldap_start_tls", opt_bool, &eldap_start_tls },
310 { "ldap_version", opt_int, &eldap_version },
311 #endif
312 { "local_from_check", opt_bool, &local_from_check },
313 { "local_from_prefix", opt_stringptr, &local_from_prefix },
314 { "local_from_suffix", opt_stringptr, &local_from_suffix },
315 { "local_interfaces", opt_stringptr, &local_interfaces },
316 { "local_scan_timeout", opt_time, &local_scan_timeout },
317 { "local_sender_retain", opt_bool, &local_sender_retain },
318 { "localhost_number", opt_stringptr, &host_number_string },
319 { "log_file_path", opt_stringptr, &log_file_path },
320 { "log_selector", opt_stringptr, &log_selector_string },
321 { "log_timezone", opt_bool, &log_timezone },
322 { "lookup_open_max", opt_int, &lookup_open_max },
323 { "max_username_length", opt_int, &max_username_length },
324 { "message_body_newlines", opt_bool, &message_body_newlines },
325 { "message_body_visible", opt_mkint, &message_body_visible },
326 { "message_id_header_domain", opt_stringptr, &message_id_domain },
327 { "message_id_header_text", opt_stringptr, &message_id_text },
328 { "message_logs", opt_bool, &message_logs },
329 { "message_size_limit", opt_stringptr, &message_size_limit },
330 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
331 { "move_frozen_messages", opt_bool, &move_frozen_messages },
332 #endif
333 { "mua_wrapper", opt_bool, &mua_wrapper },
334 #ifdef LOOKUP_MYSQL
335 { "mysql_servers", opt_stringptr, &mysql_servers },
336 #endif
337 { "never_users", opt_uidlist, &never_users },
338 #ifdef SUPPORT_TLS
339 { "openssl_options", opt_stringptr, &openssl_options },
340 #endif
341 #ifdef LOOKUP_ORACLE
342 { "oracle_servers", opt_stringptr, &oracle_servers },
343 #endif
344 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
345 #ifdef EXIM_PERL
346 { "perl_at_start", opt_bool, &opt_perl_at_start },
347 { "perl_startup", opt_stringptr, &opt_perl_startup },
348 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
349 #endif
350 #ifdef LOOKUP_PGSQL
351 { "pgsql_servers", opt_stringptr, &pgsql_servers },
352 #endif
353 { "pid_file_path", opt_stringptr, &pid_file_path },
354 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
355 #ifndef DISABLE_PRDR
356 { "prdr_enable", opt_bool, &prdr_enable },
357 #endif
358 { "preserve_message_logs", opt_bool, &preserve_message_logs },
359 { "primary_hostname", opt_stringptr, &primary_hostname },
360 { "print_topbitchars", opt_bool, &print_topbitchars },
361 { "process_log_path", opt_stringptr, &process_log_path },
362 { "prod_requires_admin", opt_bool, &prod_requires_admin },
363 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
364 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
365 { "queue_domains", opt_stringptr, &queue_domains },
366 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
367 { "queue_only", opt_bool, &queue_only },
368 { "queue_only_file", opt_stringptr, &queue_only_file },
369 { "queue_only_load", opt_fixed, &queue_only_load },
370 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
371 { "queue_only_override", opt_bool, &queue_only_override },
372 { "queue_run_in_order", opt_bool, &queue_run_in_order },
373 { "queue_run_max", opt_stringptr, &queue_run_max },
374 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
375 { "receive_timeout", opt_time, &receive_timeout },
376 { "received_header_text", opt_stringptr, &received_header_text },
377 { "received_headers_max", opt_int, &received_headers_max },
378 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
379 { "recipients_max", opt_int, &recipients_max },
380 { "recipients_max_reject", opt_bool, &recipients_max_reject },
381 #ifdef LOOKUP_REDIS
382 { "redis_servers", opt_stringptr, &redis_servers },
383 #endif
384 { "remote_max_parallel", opt_int, &remote_max_parallel },
385 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
386 { "retry_data_expire", opt_time, &retry_data_expire },
387 { "retry_interval_max", opt_time, &retry_interval_max },
388 { "return_path_remove", opt_bool, &return_path_remove },
389 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
390 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
391 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
392 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
393 { "slow_lookup_log", opt_int, &slow_lookup_log },
394 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
395 { "smtp_accept_max", opt_int, &smtp_accept_max },
396 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
397 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
398 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
399 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
400 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
401 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
402 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
403 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
404 { "smtp_banner", opt_stringptr, &smtp_banner },
405 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
406 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
407 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
408 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
409 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
410 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
411 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
412 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
413 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
414 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
415 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
416 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
417 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
418 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
419 #ifdef SUPPORT_I18N
420 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
421 #endif
422 #ifdef WITH_CONTENT_SCAN
423 { "spamd_address", opt_stringptr, &spamd_address },
424 #endif
425 #ifdef EXPERIMENTAL_SPF
426 { "spf_guess", opt_stringptr, &spf_guess },
427 #endif
428 { "split_spool_directory", opt_bool, &split_spool_directory },
429 { "spool_directory", opt_stringptr, &spool_directory },
430 #ifdef LOOKUP_SQLITE
431 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
432 #endif
433 #ifdef EXPERIMENTAL_SRS
434 { "srs_config", opt_stringptr, &srs_config },
435 { "srs_hashlength", opt_int, &srs_hashlength },
436 { "srs_hashmin", opt_int, &srs_hashmin },
437 { "srs_maxage", opt_int, &srs_maxage },
438 { "srs_secrets", opt_stringptr, &srs_secrets },
439 { "srs_usehash", opt_bool, &srs_usehash },
440 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
441 #endif
442 { "strict_acl_vars", opt_bool, &strict_acl_vars },
443 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
444 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
445 { "syslog_duplication", opt_bool, &syslog_duplication },
446 { "syslog_facility", opt_stringptr, &syslog_facility_str },
447 { "syslog_processname", opt_stringptr, &syslog_processname },
448 { "syslog_timestamp", opt_bool, &syslog_timestamp },
449 { "system_filter", opt_stringptr, &system_filter },
450 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
451 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
452 { "system_filter_group", opt_gid, &system_filter_gid },
453 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
454 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
455 { "system_filter_user", opt_uid, &system_filter_uid },
456 { "tcp_nodelay", opt_bool, &tcp_nodelay },
457 #ifdef USE_TCP_WRAPPERS
458 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
459 #endif
460 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
461 { "timezone", opt_stringptr, &timezone_string },
462 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
463 #ifdef SUPPORT_TLS
464 { "tls_certificate", opt_stringptr, &tls_certificate },
465 { "tls_crl", opt_stringptr, &tls_crl },
466 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
467 { "tls_dhparam", opt_stringptr, &tls_dhparam },
468 { "tls_eccurve", opt_stringptr, &tls_eccurve },
469 # ifndef DISABLE_OCSP
470 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
471 # endif
472 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
473 { "tls_privatekey", opt_stringptr, &tls_privatekey },
474 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
475 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
476 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
477 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
478 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
479 #endif
480 { "trusted_groups", opt_gidlist, &trusted_groups },
481 { "trusted_users", opt_uidlist, &trusted_users },
482 { "unknown_login", opt_stringptr, &unknown_login },
483 { "unknown_username", opt_stringptr, &unknown_username },
484 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
485 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
486 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
487 { "warn_message_file", opt_stringptr, &warn_message_file },
488 { "write_rejectlog", opt_bool, &write_rejectlog }
489 };
490
491 static int optionlist_config_size = nelem(optionlist_config);
492
493
494
495 /*************************************************
496 * Find the name of an option *
497 *************************************************/
498
499 /* This function is to aid debugging. Various functions take arguments that are
500 pointer variables in the options table or in option tables for various drivers.
501 For debugging output, it is useful to be able to find the name of the option
502 which is currently being processed. This function finds it, if it exists, by
503 searching the table(s).
504
505 Arguments: a value that is presumed to be in the table above
506 Returns: the option name, or an empty string
507 */
508
509 uschar *
510 readconf_find_option(void *p)
511 {
512 int i;
513 router_instance *r;
514 transport_instance *t;
515
516 for (i = 0; i < optionlist_config_size; i++)
517 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
518
519 for (r = routers; r; r = r->next)
520 {
521 router_info *ri = r->info;
522 for (i = 0; i < *ri->options_count; i++)
523 {
524 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
525 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
526 return US ri->options[i].name;
527 }
528 }
529
530 for (t = transports; t; t = t->next)
531 {
532 transport_info *ti = t->info;
533 for (i = 0; i < *ti->options_count; i++)
534 {
535 optionlist * op = &ti->options[i];
536 if ((op->type & opt_mask) != opt_stringptr) continue;
537 if (p == ( op->type & opt_public
538 ? (char *)t
539 : (char *)t->options_block
540 )
541 + (long int)op->value)
542 return US op->name;
543 }
544 }
545
546 return US"";
547 }
548
549
550
551
552 /*************************************************
553 * Deal with an assignment to a macro *
554 *************************************************/
555
556 /* This function is called when a line that starts with an upper case letter is
557 encountered. The argument "line" should contain a complete logical line, and
558 start with the first letter of the macro name. The macro name and the
559 replacement text are extracted and stored. Redefinition of existing,
560 non-command line, macros is permitted using '==' instead of '='.
561
562 Arguments:
563 s points to the start of the logical line
564
565 Returns: nothing
566 */
567
568 static void
569 read_macro_assignment(uschar *s)
570 {
571 uschar name[64];
572 int namelen = 0;
573 BOOL redef = FALSE;
574 macro_item *m;
575 macro_item *mlast = NULL;
576
577 while (isalnum(*s) || *s == '_')
578 {
579 if (namelen >= sizeof(name) - 1)
580 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
581 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
582 name[namelen++] = *s++;
583 }
584 name[namelen] = 0;
585
586 while (isspace(*s)) s++;
587 if (*s++ != '=')
588 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
589
590 if (*s == '=')
591 {
592 redef = TRUE;
593 s++;
594 }
595 while (isspace(*s)) s++;
596
597 /* If an existing macro of the same name was defined on the command line, we
598 just skip this definition. It's an error to attempt to redefine a macro without
599 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
600 It is also an error to define a macro whose name begins with the name of a
601 previously defined macro. Note: it is documented that the other way round
602 works. */
603
604 for (m = macros; m != NULL; m = m->next)
605 {
606 int len = Ustrlen(m->name);
607
608 if (Ustrcmp(m->name, name) == 0)
609 {
610 if (!m->command_line && !redef)
611 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
612 "defined (use \"==\" if you want to redefine it", name);
613 break;
614 }
615
616 if (len < namelen && Ustrstr(name, m->name) != NULL)
617 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
618 "a macro because previously defined macro \"%s\" is a substring",
619 name, m->name);
620
621 /* We cannot have this test, because it is documented that a substring
622 macro is permitted (there is even an example).
623 *
624 * if (len > namelen && Ustrstr(m->name, name) != NULL)
625 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
626 * "a macro because it is a substring of previously defined macro \"%s\"",
627 * name, m->name);
628 */
629
630 mlast = m;
631 }
632
633 /* Check for an overriding command-line definition. */
634
635 if (m != NULL && m->command_line) return;
636
637 /* Redefinition must refer to an existing macro. */
638
639 if (redef)
640 {
641 if (m == NULL)
642 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
643 "\"%s\"", name);
644 }
645
646 /* We have a new definition. The macro_item structure includes a final vector
647 called "name" which is one byte long. Thus, adding "namelen" gives us enough
648 room to store the "name" string. */
649
650 else
651 {
652 m = store_get(sizeof(macro_item) + namelen);
653 if (macros == NULL) macros = m; else mlast->next = m;
654 Ustrncpy(m->name, name, namelen);
655 m->name[namelen] = 0;
656 m->next = NULL;
657 m->command_line = FALSE;
658 }
659
660 /* Set the value of the new or redefined macro */
661
662 m->replacement = string_copy(s);
663 }
664
665
666
667
668
669 /*************************************************
670 * Read configuration line *
671 *************************************************/
672
673 /* A logical line of text is read from the configuration file into the big
674 buffer, taking account of macros, .includes, and continuations. The size of
675 big_buffer is increased if necessary. The count of configuration lines is
676 maintained. Physical input lines starting with # (ignoring leading white space,
677 and after macro replacement) and empty logical lines are always ignored.
678 Leading and trailing spaces are removed.
679
680 If we hit a line of the form "begin xxxx", the xxxx is placed in the
681 next_section vector, and the function returns NULL, indicating the end of a
682 configuration section. On end-of-file, NULL is returned with next_section
683 empty.
684
685 Arguments: none
686
687 Returns: a pointer to the first non-blank in the line,
688 or NULL if eof or end of section is reached
689 */
690
691 static uschar *
692 get_config_line(void)
693 {
694 int startoffset = 0; /* To first non-blank char in logical line */
695 int len = 0; /* Of logical line so far */
696 int newlen;
697 uschar *s, *ss;
698 macro_item *m;
699 BOOL macro_found;
700
701 /* Loop for handling continuation lines, skipping comments, and dealing with
702 .include files. */
703
704 for (;;)
705 {
706 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
707 {
708 if (config_file_stack != NULL) /* EOF inside .include */
709 {
710 (void)fclose(config_file);
711 config_file = config_file_stack->file;
712 config_filename = config_file_stack->filename;
713 config_lineno = config_file_stack->lineno;
714 config_file_stack = config_file_stack->next;
715 if (config_lines)
716 save_config_position(config_filename, config_lineno);
717 continue;
718 }
719
720 /* EOF at top level */
721
722 if (cstate_stack_ptr >= 0)
723 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
724 "Unexpected end of configuration file: .endif missing");
725
726 if (len != 0) break; /* EOF after continuation */
727 next_section[0] = 0; /* EOF at start of logical line */
728 return NULL;
729 }
730
731 config_lineno++;
732 newlen = len + Ustrlen(big_buffer + len);
733
734 if (config_lines && config_lineno == 1)
735 save_config_position(config_filename, config_lineno);
736
737 /* Handle pathologically long physical lines - yes, it did happen - by
738 extending big_buffer at this point. The code also copes with very long
739 logical lines. */
740
741 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
742 {
743 uschar *newbuffer;
744 big_buffer_size += BIG_BUFFER_SIZE;
745 newbuffer = store_malloc(big_buffer_size);
746
747 /* This use of strcpy is OK because we know that the string in the old
748 buffer is shorter than the new buffer. */
749
750 Ustrcpy(newbuffer, big_buffer);
751 store_free(big_buffer);
752 big_buffer = newbuffer;
753 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
754 break;
755 newlen += Ustrlen(big_buffer + newlen);
756 }
757
758 /* Find the true start of the physical line - leading spaces are always
759 ignored. */
760
761 ss = big_buffer + len;
762 while (isspace(*ss)) ss++;
763
764 /* Process the physical line for macros. If this is the start of the logical
765 line, skip over initial text at the start of the line if it starts with an
766 upper case character followed by a sequence of name characters and an equals
767 sign, because that is the definition of a new macro, and we don't do
768 replacement therein. */
769
770 s = ss;
771 if (len == 0 && isupper(*s))
772 {
773 while (isalnum(*s) || *s == '_') s++;
774 while (isspace(*s)) s++;
775 if (*s != '=') s = ss; /* Not a macro definition */
776 }
777
778 /* For each defined macro, scan the line (from after XXX= if present),
779 replacing all occurrences of the macro. */
780
781 macro_found = FALSE;
782 for (m = macros; m != NULL; m = m->next)
783 {
784 uschar *p, *pp;
785 uschar *t = s;
786
787 while ((p = Ustrstr(t, m->name)) != NULL)
788 {
789 int moveby;
790 int namelen = Ustrlen(m->name);
791 int replen = Ustrlen(m->replacement);
792
793 /* Expand the buffer if necessary */
794
795 while (newlen - namelen + replen + 1 > big_buffer_size)
796 {
797 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
798 uschar *newbuffer = store_malloc(newsize);
799 memcpy(newbuffer, big_buffer, newlen + 1);
800 p = newbuffer + (p - big_buffer);
801 s = newbuffer + (s - big_buffer);
802 ss = newbuffer + (ss - big_buffer);
803 t = newbuffer + (t - big_buffer);
804 big_buffer_size = newsize;
805 store_free(big_buffer);
806 big_buffer = newbuffer;
807 }
808
809 /* Shuffle the remaining characters up or down in the buffer before
810 copying in the replacement text. Don't rescan the replacement for this
811 same macro. */
812
813 pp = p + namelen;
814 moveby = replen - namelen;
815 if (moveby != 0)
816 {
817 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
818 newlen += moveby;
819 }
820 Ustrncpy(p, m->replacement, replen);
821 t = p + replen;
822 macro_found = TRUE;
823 }
824 }
825
826 /* An empty macro replacement at the start of a line could mean that ss no
827 longer points to the first non-blank character. */
828
829 while (isspace(*ss)) ss++;
830
831 /* Check for comment lines - these are physical lines. */
832
833 if (*ss == '#') continue;
834
835 /* Handle conditionals, which are also applied to physical lines. Conditions
836 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
837 expansion occured on the rest of the line. A preliminary test for the leading
838 '.' saves effort on most lines. */
839
840 if (*ss == '.')
841 {
842 int i;
843
844 /* Search the list of conditional directives */
845
846 for (i = 0; i < cond_list_size; i++)
847 {
848 int n;
849 cond_item *c = cond_list+i;
850 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
851
852 /* The following character must be white space or end of string */
853
854 n = ss[1 + c->namelen];
855 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
856
857 /* .ifdef and .ifndef push the current state onto the stack, then set
858 a new one from the table. Stack overflow is an error */
859
860 if (c->pushpop > 0)
861 {
862 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
863 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
864 ".%s nested too deeply", c->name);
865 cstate_stack[++cstate_stack_ptr] = cstate;
866 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
867 }
868
869 /* For any of the others, stack underflow is an error. The next state
870 comes either from the stack (.endif) or from the table. */
871
872 else
873 {
874 if (cstate_stack_ptr < 0)
875 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
876 ".%s without matching .ifdef", c->name);
877 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
878 next_cstate[cstate][macro_found? c->action1 : c->action2];
879 }
880
881 /* Having dealt with a directive, break the loop */
882
883 break;
884 }
885
886 /* If we have handled a conditional directive, continue with the next
887 physical line. Otherwise, fall through. */
888
889 if (i < cond_list_size) continue;
890 }
891
892 /* If the conditional state is not 0 (actively using these lines), ignore
893 this input line. */
894
895 if (cstate != 0) continue; /* Conditional skip */
896
897 /* Handle .include lines - these are also physical lines. */
898
899 if (Ustrncmp(ss, ".include", 8) == 0 &&
900 (isspace(ss[8]) ||
901 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
902 {
903 uschar *t;
904 int include_if_exists = isspace(ss[8])? 0 : 10;
905 config_file_item *save;
906 struct stat statbuf;
907
908 ss += 9 + include_if_exists;
909 while (isspace(*ss)) ss++;
910 t = ss + Ustrlen(ss);
911 while (t > ss && isspace(t[-1])) t--;
912 if (*ss == '\"' && t[-1] == '\"')
913 {
914 ss++;
915 t--;
916 }
917 *t = 0;
918
919 if (*ss != '/')
920 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
921 "absolute path \"%s\"", ss);
922
923 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
924
925 if (config_lines)
926 save_config_position(config_filename, config_lineno);
927 save = store_get(sizeof(config_file_item));
928 save->next = config_file_stack;
929 config_file_stack = save;
930 save->file = config_file;
931 save->filename = config_filename;
932 save->lineno = config_lineno;
933
934 if (!(config_file = Ufopen(ss, "rb")))
935 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
936 "configuration file %s", ss);
937
938 config_filename = string_copy(ss);
939 config_lineno = 0;
940 continue;
941 }
942
943 /* If this is the start of the logical line, remember where the non-blank
944 data starts. Otherwise shuffle down continuation lines to remove leading
945 white space. */
946
947 if (len == 0)
948 startoffset = ss - big_buffer;
949 else
950 {
951 s = big_buffer + len;
952 if (ss > s)
953 {
954 memmove(s, ss, (newlen - len) - (ss - s) + 1);
955 newlen -= ss - s;
956 }
957 }
958
959 /* Accept the new addition to the line. Remove trailing white space. */
960
961 len = newlen;
962 while (len > 0 && isspace(big_buffer[len-1])) len--;
963 big_buffer[len] = 0;
964
965 /* We are done if the line does not end in backslash and contains some data.
966 Empty logical lines are ignored. For continuations, remove the backslash and
967 go round the loop to read the continuation line. */
968
969 if (len > 0)
970 {
971 if (big_buffer[len-1] != '\\') break; /* End of logical line */
972 big_buffer[--len] = 0; /* Remove backslash */
973 }
974 } /* Loop for reading multiple physical lines */
975
976 /* We now have a logical line. Test for the end of a configuration section (or,
977 more accurately, for the start of the next section). Place the name of the next
978 section in next_section, and return NULL. If the name given is longer than
979 next_section, truncate it. It will be unrecognized later, because all the known
980 section names do fit. Leave space for pluralizing. */
981
982 s = big_buffer + startoffset; /* First non-space character */
983
984 if (config_lines)
985 save_config_line(s);
986
987 if (strncmpic(s, US"begin ", 6) == 0)
988 {
989 s += 6;
990 while (isspace(*s)) s++;
991 if (big_buffer + len - s > sizeof(next_section) - 2)
992 s[sizeof(next_section) - 2] = 0;
993 Ustrcpy(next_section, s);
994 return NULL;
995 }
996
997 /* Return the first non-blank character. */
998
999 return s;
1000 }
1001
1002
1003
1004 /*************************************************
1005 * Read a name *
1006 *************************************************/
1007
1008 /* The yield is the pointer to the next uschar. Names longer than the
1009 output space are silently truncated. This function is also used from acl.c when
1010 parsing ACLs.
1011
1012 Arguments:
1013 name where to put the name
1014 len length of name
1015 s input pointer
1016
1017 Returns: new input pointer
1018 */
1019
1020 uschar *
1021 readconf_readname(uschar *name, int len, uschar *s)
1022 {
1023 int p = 0;
1024 while (isspace(*s)) s++;
1025 if (isalpha(*s))
1026 {
1027 while (isalnum(*s) || *s == '_')
1028 {
1029 if (p < len-1) name[p++] = *s;
1030 s++;
1031 }
1032 }
1033 name[p] = 0;
1034 while (isspace(*s)) s++;
1035 return s;
1036 }
1037
1038
1039
1040
1041 /*************************************************
1042 * Read a time value *
1043 *************************************************/
1044
1045 /* This function is also called from outside, to read argument
1046 time values. The format of a time value is:
1047
1048 [<n>w][<n>d][<n>h][<n>m][<n>s]
1049
1050 as long as at least one is present. If a format error is encountered,
1051 return a negative value. The value must be terminated by the given
1052 terminator.
1053
1054 Arguments:
1055 s input pointer
1056 terminator required terminating character
1057 return_msec if TRUE, allow fractional seconds and return milliseconds
1058
1059 Returns: the time value, or -1 on syntax error
1060 value is seconds if return_msec is FALSE
1061 value is milliseconds if return_msec is TRUE
1062 */
1063
1064 int
1065 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1066 {
1067 int yield = 0;
1068 for (;;)
1069 {
1070 int value, count;
1071 double fraction;
1072
1073 if (!isdigit(*s)) return -1;
1074 (void)sscanf(CCS s, "%d%n", &value, &count);
1075 s += count;
1076
1077 switch (*s)
1078 {
1079 case 'w': value *= 7;
1080 case 'd': value *= 24;
1081 case 'h': value *= 60;
1082 case 'm': value *= 60;
1083 case 's': s++;
1084 break;
1085
1086 case '.':
1087 if (!return_msec) return -1;
1088 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1089 s += count;
1090 if (*s++ != 's') return -1;
1091 yield += (int)(fraction * 1000.0);
1092 break;
1093
1094 default: return -1;
1095 }
1096
1097 if (return_msec) value *= 1000;
1098 yield += value;
1099 if (*s == terminator) return yield;
1100 }
1101 /* Control never reaches here. */
1102 }
1103
1104
1105
1106 /*************************************************
1107 * Read a fixed point value *
1108 *************************************************/
1109
1110 /* The value is returned *1000
1111
1112 Arguments:
1113 s input pointer
1114 terminator required terminator
1115
1116 Returns: the value, or -1 on error
1117 */
1118
1119 static int
1120 readconf_readfixed(const uschar *s, int terminator)
1121 {
1122 int yield = 0;
1123 int value, count;
1124 if (!isdigit(*s)) return -1;
1125 (void)sscanf(CS s, "%d%n", &value, &count);
1126 s += count;
1127 yield = value * 1000;
1128 if (*s == '.')
1129 {
1130 int m = 100;
1131 while (isdigit((*(++s))))
1132 {
1133 yield += (*s - '0') * m;
1134 m /= 10;
1135 }
1136 }
1137
1138 return (*s == terminator)? yield : (-1);
1139 }
1140
1141
1142
1143 /*************************************************
1144 * Find option in list *
1145 *************************************************/
1146
1147 /* The lists are always in order, so binary chop can be used.
1148
1149 Arguments:
1150 name the option name to search for
1151 ol the first entry in the option list
1152 last one more than the offset of the last entry in the option list
1153
1154 Returns: pointer to an option entry, or NULL if not found
1155 */
1156
1157 static optionlist *
1158 find_option(uschar *name, optionlist *ol, int last)
1159 {
1160 int first = 0;
1161 while (last > first)
1162 {
1163 int middle = (first + last)/2;
1164 int c = Ustrcmp(name, ol[middle].name);
1165
1166 if (c == 0) return ol + middle;
1167 else if (c > 0) first = middle + 1;
1168 else last = middle;
1169 }
1170 return NULL;
1171 }
1172
1173
1174
1175 /*************************************************
1176 * Find a set flag in option list *
1177 *************************************************/
1178
1179 /* Because some versions of Unix make no restrictions on the values of uids and
1180 gids (even negative ones), we cannot represent "unset" by a special value.
1181 There is therefore a separate boolean variable for each one indicating whether
1182 a value is set or not. This function returns a pointer to the boolean, given
1183 the original option name. It is a major disaster if the flag cannot be found.
1184
1185 Arguments:
1186 name the name of the uid or gid option
1187 oltop points to the start of the relevant option list
1188 last one more than the offset of the last item in the option list
1189 data_block NULL when reading main options => data values in the option
1190 list are absolute addresses; otherwise they are byte offsets
1191 in data_block (used for driver options)
1192
1193 Returns: a pointer to the boolean flag.
1194 */
1195
1196 static BOOL *
1197 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1198 {
1199 optionlist *ol;
1200 uschar name2[64];
1201 sprintf(CS name2, "*set_%.50s", name);
1202 ol = find_option(name2, oltop, last);
1203 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1204 "Exim internal error: missing set flag for %s", name);
1205 return (data_block == NULL)? (BOOL *)(ol->value) :
1206 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1207 }
1208
1209
1210
1211
1212 /*************************************************
1213 * Output extra characters message and die *
1214 *************************************************/
1215
1216 /* Called when an option line has junk on the end. Sometimes this is because
1217 the sysadmin thinks comments are permitted.
1218
1219 Arguments:
1220 s points to the extra characters
1221 t1..t3 strings to insert in the log message
1222
1223 Returns: doesn't return; dies
1224 */
1225
1226 static void
1227 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1228 {
1229 uschar *comment = US"";
1230 if (*s == '#') comment = US" (# is comment only at line start)";
1231 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1232 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1233 }
1234
1235
1236
1237 /*************************************************
1238 * Read rewrite information *
1239 *************************************************/
1240
1241 /* Each line of rewrite information contains:
1242
1243 . A complete address in the form user@domain, possibly with
1244 leading * for each part; or alternatively, a regex.
1245
1246 . A replacement string (which will be expanded).
1247
1248 . An optional sequence of one-letter flags, indicating which
1249 headers etc. to apply this rule to.
1250
1251 All this is decoded and placed into a control block. The OR of the flags is
1252 maintained in a common word.
1253
1254 Arguments:
1255 p points to the string that makes up the rule
1256 existflags points to the overall flag word
1257 isglobal TRUE if reading global rewrite rules
1258
1259 Returns: the control block for the parsed rule.
1260 */
1261
1262 static rewrite_rule *
1263 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1264 {
1265 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1266
1267 next->next = NULL;
1268 next->key = string_dequote(&p);
1269
1270 while (isspace(*p)) p++;
1271 if (*p == 0)
1272 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1273 "missing rewrite replacement string");
1274
1275 next->flags = 0;
1276 next->replacement = string_dequote(&p);
1277
1278 while (*p != 0) switch (*p++)
1279 {
1280 case ' ': case '\t': break;
1281
1282 case 'q': next->flags |= rewrite_quit; break;
1283 case 'w': next->flags |= rewrite_whole; break;
1284
1285 case 'h': next->flags |= rewrite_all_headers; break;
1286 case 's': next->flags |= rewrite_sender; break;
1287 case 'f': next->flags |= rewrite_from; break;
1288 case 't': next->flags |= rewrite_to; break;
1289 case 'c': next->flags |= rewrite_cc; break;
1290 case 'b': next->flags |= rewrite_bcc; break;
1291 case 'r': next->flags |= rewrite_replyto; break;
1292
1293 case 'E': next->flags |= rewrite_all_envelope; break;
1294 case 'F': next->flags |= rewrite_envfrom; break;
1295 case 'T': next->flags |= rewrite_envto; break;
1296
1297 case 'Q': next->flags |= rewrite_qualify; break;
1298 case 'R': next->flags |= rewrite_repeat; break;
1299
1300 case 'S':
1301 next->flags |= rewrite_smtp;
1302 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1303 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1304 "rewrite rule has the S flag but is not a regular expression");
1305 break;
1306
1307 default:
1308 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1309 "unknown rewrite flag character '%c' "
1310 "(could be missing quotes round replacement item)", p[-1]);
1311 break;
1312 }
1313
1314 /* If no action flags are set, set all the "normal" rewrites. */
1315
1316 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1317 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1318
1319 /* Remember which exist, for optimization, and return the rule */
1320
1321 *existflags |= next->flags;
1322 return next;
1323 }
1324
1325
1326
1327
1328 /*************************************************
1329 * Read global rewrite information *
1330 *************************************************/
1331
1332 /* Each line is a single rewrite rule; it is parsed into a control block
1333 by readconf_one_rewrite(), and its flags are ORed into the global flag
1334 word rewrite_existflags. */
1335
1336 void
1337 readconf_rewrites(void)
1338 {
1339 rewrite_rule **chain = &global_rewrite_rules;
1340 uschar *p;
1341
1342 while ((p = get_config_line()) != NULL)
1343 {
1344 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1345 *chain = next;
1346 chain = &(next->next);
1347 }
1348 }
1349
1350
1351
1352 /*************************************************
1353 * Read a string *
1354 *************************************************/
1355
1356 /* Strings are read into the normal store pool. As long we aren't too
1357 near the end of the current block, the string will just use what is necessary
1358 on the top of the stacking pool, because string_cat() uses the extension
1359 mechanism.
1360
1361 Argument:
1362 s the rest of the input line
1363 name the option name (for errors)
1364
1365 Returns: pointer to the string
1366 */
1367
1368 static uschar *
1369 read_string(const uschar *s, const uschar *name)
1370 {
1371 uschar *yield;
1372 const uschar *ss;
1373
1374 if (*s != '\"') return string_copy(s);
1375
1376 ss = s;
1377 yield = string_dequote(&s);
1378
1379 if (s == ss+1 || s[-1] != '\"')
1380 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1381 "missing quote at end of string value for %s", name);
1382
1383 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1384
1385 return yield;
1386 }
1387
1388
1389 /*************************************************
1390 * Custom-handler options *
1391 *************************************************/
1392 static void
1393 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1394 {
1395 if (*str == '$')
1396 smtp_receive_timeout_s = string_copy(str);
1397 else
1398 {
1399 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1400 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1401 if (smtp_receive_timeout < 0)
1402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1403 name);
1404 }
1405 }
1406
1407 /*************************************************
1408 * Handle option line *
1409 *************************************************/
1410
1411 /* This function is called from several places to process a line containing the
1412 setting of an option. The first argument is the line to be decoded; it has been
1413 checked not to be empty and not to start with '#'. Trailing newlines and white
1414 space have been removed. The second argument is a pointer to the list of
1415 variable names that are to be recognized, together with their types and
1416 locations, and the third argument gives the number of entries in the list.
1417
1418 The fourth argument is a pointer to a data block. If it is NULL, then the data
1419 values in the options list are absolute addresses. Otherwise, they are byte
1420 offsets in the data block.
1421
1422 String option data may continue onto several lines; this function reads further
1423 data from config_file if necessary.
1424
1425 The yield of this function is normally zero. If a string continues onto
1426 multiple lines, then the data value is permitted to be followed by a comma
1427 or a semicolon (for use in drivers) and the yield is that character.
1428
1429 Arguments:
1430 buffer contains the configuration line to be handled
1431 oltop points to the start of the relevant option list
1432 last one more than the offset of the last item in the option list
1433 data_block NULL when reading main options => data values in the option
1434 list are absolute addresses; otherwise they are byte offsets
1435 in data_block when they have opt_public set; otherwise
1436 they are byte offsets in data_block->options_block.
1437 unknown_txt format string to use in panic message for unknown option;
1438 must contain %s for option name
1439 if given as NULL, don't panic on unknown option
1440
1441 Returns: TRUE if an option was read successfully,
1442 FALSE false for an unknown option if unknown_txt == NULL,
1443 otherwise panic and die on an unknown option
1444 */
1445
1446 static BOOL
1447 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1448 void *data_block, uschar *unknown_txt)
1449 {
1450 int ptr = 0;
1451 int offset = 0;
1452 int n, count, type, value;
1453 int issecure = 0;
1454 uid_t uid;
1455 gid_t gid;
1456 BOOL boolvalue = TRUE;
1457 BOOL freesptr = TRUE;
1458 optionlist *ol, *ol2;
1459 struct passwd *pw;
1460 void *reset_point;
1461 int intbase = 0;
1462 uschar *inttype = US"";
1463 uschar *sptr;
1464 uschar *s = buffer;
1465 uschar *saved_condition, *strtemp;
1466 uschar **str_target;
1467 uschar name[64];
1468 uschar name2[64];
1469
1470 /* There may be leading spaces; thereafter, we expect an option name starting
1471 with a letter. */
1472
1473 while (isspace(*s)) s++;
1474 if (!isalpha(*s))
1475 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1476
1477 /* Read the name of the option, and skip any subsequent white space. If
1478 it turns out that what we read was "hide", set the flag indicating that
1479 this is a secure option, and loop to read the next word. */
1480
1481 for (n = 0; n < 2; n++)
1482 {
1483 while (isalnum(*s) || *s == '_')
1484 {
1485 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1486 s++;
1487 }
1488 name[ptr] = 0;
1489 while (isspace(*s)) s++;
1490 if (Ustrcmp(name, "hide") != 0) break;
1491 issecure = opt_secure;
1492 ptr = 0;
1493 }
1494
1495 /* Deal with "no_" or "not_" here for booleans */
1496
1497 if (Ustrncmp(name, "no_", 3) == 0)
1498 {
1499 boolvalue = FALSE;
1500 offset = 3;
1501 }
1502
1503 if (Ustrncmp(name, "not_", 4) == 0)
1504 {
1505 boolvalue = FALSE;
1506 offset = 4;
1507 }
1508
1509 /* Search the list for the given name. A non-existent name, or an option that
1510 is set twice, is a disaster. */
1511
1512 if (!(ol = find_option(name + offset, oltop, last)))
1513 {
1514 if (unknown_txt == NULL) return FALSE;
1515 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1516 }
1517
1518 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1519 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1520 "\"%s\" option set for the second time", name);
1521
1522 ol->type |= opt_set | issecure;
1523 type = ol->type & opt_mask;
1524
1525 /* Types with data values must be followed by '='; the "no[t]_" prefix
1526 applies only to boolean values. */
1527
1528 if (type < opt_bool || type > opt_bool_last)
1529 {
1530 if (offset != 0)
1531 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1532 "negation prefix applied to a non-boolean option");
1533 if (*s == 0)
1534 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1535 "unexpected end of line (data missing) after %s", name);
1536 if (*s != '=')
1537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1538 }
1539
1540 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1541 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1542 ultimately expands to one of those values. */
1543
1544 else if (*s != 0 && (offset != 0 || *s != '='))
1545 extra_chars_error(s, US"boolean option ", name, US"");
1546
1547 /* Skip white space after = */
1548
1549 if (*s == '=') while (isspace((*(++s))));
1550
1551 /* If there is a data block and the opt_public flag is not set, change
1552 the data block pointer to the private options block. */
1553
1554 if (data_block != NULL && (ol->type & opt_public) == 0)
1555 data_block = (void *)(((driver_instance *)data_block)->options_block);
1556
1557 /* Now get the data according to the type. */
1558
1559 switch (type)
1560 {
1561 /* If a string value is not enclosed in quotes, it consists of
1562 the rest of the current line, verbatim. Otherwise, string escapes
1563 are processed.
1564
1565 A transport is specified as a string, which is then looked up in the
1566 list of transports. A search type is specified as one of a number of
1567 known strings.
1568
1569 A set or rewrite rules for a driver is specified as a string, which is
1570 then parsed into a suitable chain of control blocks.
1571
1572 Uids and gids are specified as strings which are then looked up in the
1573 passwd file. Lists of uids and gids are similarly specified as colon-
1574 separated strings. */
1575
1576 case opt_stringptr:
1577 case opt_uid:
1578 case opt_gid:
1579 case opt_expand_uid:
1580 case opt_expand_gid:
1581 case opt_uidlist:
1582 case opt_gidlist:
1583 case opt_rewrite:
1584
1585 reset_point = sptr = read_string(s, name);
1586
1587 /* Having read a string, we now have several different ways of using it,
1588 depending on the data type, so do another switch. If keeping the actual
1589 string is not required (because it is interpreted), freesptr is set TRUE,
1590 and at the end we reset the pool. */
1591
1592 switch (type)
1593 {
1594 /* If this was a string, set the variable to point to the new string,
1595 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1596 rules, we still keep the string (for printing), and parse the rules into a
1597 control block and flags word. */
1598
1599 case opt_stringptr:
1600 if (data_block == NULL)
1601 str_target = (uschar **)(ol->value);
1602 else
1603 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1604 if (ol->type & opt_rep_con)
1605 {
1606 /* We already have a condition, we're conducting a crude hack to let
1607 multiple condition rules be chained together, despite storing them in
1608 text form. */
1609 saved_condition = *str_target;
1610 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1611 saved_condition, sptr);
1612 *str_target = string_copy_malloc(strtemp);
1613 /* TODO(pdp): there is a memory leak here and just below
1614 when we set 3 or more conditions; I still don't
1615 understand the store mechanism enough to know
1616 what's the safe way to free content from an earlier store.
1617 AFAICT, stores stack, so freeing an early stored item also stores
1618 all data alloc'd after it. If we knew conditions were adjacent,
1619 we could survive that, but we don't. So I *think* we need to take
1620 another bit from opt_type to indicate "malloced"; this seems like
1621 quite a hack, especially for this one case. It also means that
1622 we can't ever reclaim the store from the *first* condition.
1623
1624 Because we only do this once, near process start-up, I'm prepared to
1625 let this slide for the time being, even though it rankles. */
1626 }
1627 else if (ol->type & opt_rep_str)
1628 {
1629 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1630 int sep_i = -(int)sep_o;
1631 const uschar * list = sptr;
1632 uschar * s;
1633 uschar * list_o = *str_target;
1634
1635 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1636 list_o = string_append_listele(list_o, sep_o, s);
1637 if (list_o)
1638 *str_target = string_copy_malloc(list_o);
1639 }
1640 else
1641 {
1642 *str_target = sptr;
1643 freesptr = FALSE;
1644 }
1645 break;
1646
1647 case opt_rewrite:
1648 if (data_block == NULL)
1649 *((uschar **)(ol->value)) = sptr;
1650 else
1651 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1652 freesptr = FALSE;
1653 if (type == opt_rewrite)
1654 {
1655 int sep = 0;
1656 int *flagptr;
1657 uschar *p = sptr;
1658 rewrite_rule **chain;
1659 optionlist *ol3;
1660
1661 sprintf(CS name2, "*%.50s_rules", name);
1662 ol2 = find_option(name2, oltop, last);
1663 sprintf(CS name2, "*%.50s_flags", name);
1664 ol3 = find_option(name2, oltop, last);
1665
1666 if (ol2 == NULL || ol3 == NULL)
1667 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1668 "rewrite rules not available for driver");
1669
1670 if (data_block == NULL)
1671 {
1672 chain = (rewrite_rule **)(ol2->value);
1673 flagptr = (int *)(ol3->value);
1674 }
1675 else
1676 {
1677 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1678 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1679 }
1680
1681 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1682 {
1683 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1684 *chain = next;
1685 chain = &(next->next);
1686 }
1687
1688 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1689 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1690 "non-header rewrite - not allowed at transport time -");
1691 }
1692 break;
1693
1694 /* If it was an expanded uid, see if there is any expansion to be
1695 done by checking for the presence of a $ character. If there is, save it
1696 in the corresponding *expand_user option field. Otherwise, fall through
1697 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1698 of data. */
1699
1700 case opt_expand_uid:
1701 sprintf(CS name2, "*expand_%.50s", name);
1702 ol2 = find_option(name2, oltop, last);
1703 if (ol2 != NULL)
1704 {
1705 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1706
1707 if (data_block == NULL)
1708 *((uschar **)(ol2->value)) = ss;
1709 else
1710 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1711
1712 if (ss != NULL)
1713 {
1714 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1715 freesptr = FALSE;
1716 break;
1717 }
1718 }
1719
1720 /* Look up a fixed uid, and also make use of the corresponding gid
1721 if a passwd entry is returned and the gid has not been set. */
1722
1723 case opt_uid:
1724 if (!route_finduser(sptr, &pw, &uid))
1725 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1726 if (data_block == NULL)
1727 *((uid_t *)(ol->value)) = uid;
1728 else
1729 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1730
1731 /* Set the flag indicating a fixed value is set */
1732
1733 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1734
1735 /* Handle matching gid if we have a passwd entry: done by finding the
1736 same name with terminating "user" changed to "group"; if not found,
1737 ignore. Also ignore if the value is already set. */
1738
1739 if (pw == NULL) break;
1740 Ustrcpy(name+Ustrlen(name)-4, "group");
1741 ol2 = find_option(name, oltop, last);
1742 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1743 (ol2->type & opt_mask) == opt_expand_gid))
1744 {
1745 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1746 if (! *set_flag)
1747 {
1748 if (data_block == NULL)
1749 *((gid_t *)(ol2->value)) = pw->pw_gid;
1750 else
1751 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1752 *set_flag = TRUE;
1753 }
1754 }
1755 break;
1756
1757 /* If it was an expanded gid, see if there is any expansion to be
1758 done by checking for the presence of a $ character. If there is, save it
1759 in the corresponding *expand_user option field. Otherwise, fall through
1760 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1761 of data. */
1762
1763 case opt_expand_gid:
1764 sprintf(CS name2, "*expand_%.50s", name);
1765 ol2 = find_option(name2, oltop, last);
1766 if (ol2 != NULL)
1767 {
1768 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1769
1770 if (data_block == NULL)
1771 *((uschar **)(ol2->value)) = ss;
1772 else
1773 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1774
1775 if (ss != NULL)
1776 {
1777 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1778 freesptr = FALSE;
1779 break;
1780 }
1781 }
1782
1783 /* Handle freestanding gid */
1784
1785 case opt_gid:
1786 if (!route_findgroup(sptr, &gid))
1787 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1788 if (data_block == NULL)
1789 *((gid_t *)(ol->value)) = gid;
1790 else
1791 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1792 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1793 break;
1794
1795 /* If it was a uid list, look up each individual entry, and build
1796 a vector of uids, with a count in the first element. Put the vector
1797 in malloc store so we can free the string. (We are reading into
1798 permanent store already.) */
1799
1800 case opt_uidlist:
1801 {
1802 int count = 1;
1803 uid_t *list;
1804 int ptr = 0;
1805 const uschar *p;
1806 const uschar *op = expand_string (sptr);
1807
1808 if (op == NULL)
1809 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1810 name, expand_string_message);
1811
1812 p = op;
1813 if (*p != 0) count++;
1814 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1815 list = store_malloc(count*sizeof(uid_t));
1816 list[ptr++] = (uid_t)(count - 1);
1817
1818 if (data_block == NULL)
1819 *((uid_t **)(ol->value)) = list;
1820 else
1821 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1822
1823 p = op;
1824 while (count-- > 1)
1825 {
1826 int sep = 0;
1827 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1828 if (!route_finduser(big_buffer, NULL, &uid))
1829 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1830 big_buffer);
1831 list[ptr++] = uid;
1832 }
1833 }
1834 break;
1835
1836 /* If it was a gid list, look up each individual entry, and build
1837 a vector of gids, with a count in the first element. Put the vector
1838 in malloc store so we can free the string. (We are reading into permanent
1839 store already.) */
1840
1841 case opt_gidlist:
1842 {
1843 int count = 1;
1844 gid_t *list;
1845 int ptr = 0;
1846 const uschar *p;
1847 const uschar *op = expand_string (sptr);
1848
1849 if (op == NULL)
1850 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1851 name, expand_string_message);
1852
1853 p = op;
1854 if (*p != 0) count++;
1855 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1856 list = store_malloc(count*sizeof(gid_t));
1857 list[ptr++] = (gid_t)(count - 1);
1858
1859 if (data_block == NULL)
1860 *((gid_t **)(ol->value)) = list;
1861 else
1862 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1863
1864 p = op;
1865 while (count-- > 1)
1866 {
1867 int sep = 0;
1868 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1869 if (!route_findgroup(big_buffer, &gid))
1870 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1871 big_buffer);
1872 list[ptr++] = gid;
1873 }
1874 }
1875 break;
1876 }
1877
1878 /* Release store if the value of the string doesn't need to be kept. */
1879
1880 if (freesptr) store_reset(reset_point);
1881 break;
1882
1883 /* Expanded boolean: if no characters follow, or if there are no dollar
1884 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1885 save the string for later expansion in the alternate place. */
1886
1887 case opt_expand_bool:
1888 if (*s != 0 && Ustrchr(s, '$') != 0)
1889 {
1890 sprintf(CS name2, "*expand_%.50s", name);
1891 ol2 = find_option(name2, oltop, last);
1892 if (ol2 != NULL)
1893 {
1894 reset_point = sptr = read_string(s, name);
1895 if (data_block == NULL)
1896 *((uschar **)(ol2->value)) = sptr;
1897 else
1898 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1899 freesptr = FALSE;
1900 break;
1901 }
1902 }
1903 /* Fall through */
1904
1905 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1906 look for yes/not/true/false. Some booleans are stored in a single bit in
1907 a single int. There's a special fudge for verify settings; without a suffix
1908 they set both xx_sender and xx_recipient. The table points to the sender
1909 value; search subsequently for the recipient. There's another special case:
1910 opt_bool_set also notes when a boolean has been set. */
1911
1912 case opt_bool:
1913 case opt_bit:
1914 case opt_bool_verify:
1915 case opt_bool_set:
1916 if (*s != 0)
1917 {
1918 s = readconf_readname(name2, 64, s);
1919 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1920 boolvalue = TRUE;
1921 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1922 boolvalue = FALSE;
1923 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1924 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1925 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1926 US"for boolean option ", name);
1927 }
1928
1929 /* Handle single-bit type. */
1930
1931 if (type == opt_bit)
1932 {
1933 int bit = 1 << ((ol->type >> 16) & 31);
1934 int *ptr = (data_block == NULL)?
1935 (int *)(ol->value) :
1936 (int *)((uschar *)data_block + (long int)ol->value);
1937 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1938 break;
1939 }
1940
1941 /* Handle full BOOL types */
1942
1943 if (data_block == NULL)
1944 *((BOOL *)(ol->value)) = boolvalue;
1945 else
1946 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1947
1948 /* Verify fudge */
1949
1950 if (type == opt_bool_verify)
1951 {
1952 sprintf(CS name2, "%.50s_recipient", name + offset);
1953 ol2 = find_option(name2, oltop, last);
1954 if (ol2 != NULL)
1955 {
1956 if (data_block == NULL)
1957 *((BOOL *)(ol2->value)) = boolvalue;
1958 else
1959 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1960 }
1961 }
1962
1963 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1964
1965 else if (type == opt_bool_set)
1966 {
1967 sprintf(CS name2, "*set_%.50s", name + offset);
1968 ol2 = find_option(name2, oltop, last);
1969 if (ol2 != NULL)
1970 {
1971 if (data_block == NULL)
1972 *((BOOL *)(ol2->value)) = TRUE;
1973 else
1974 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1975 }
1976 }
1977 break;
1978
1979 /* Octal integer */
1980
1981 case opt_octint:
1982 intbase = 8;
1983 inttype = US"octal ";
1984
1985 /* Integer: a simple(ish) case; allow octal and hex formats, and
1986 suffixes K, M and G. The different types affect output, not input. */
1987
1988 case opt_mkint:
1989 case opt_int:
1990 {
1991 uschar *endptr;
1992 long int lvalue;
1993
1994 errno = 0;
1995 lvalue = strtol(CS s, CSS &endptr, intbase);
1996
1997 if (endptr == s)
1998 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1999 inttype, name);
2000
2001 if (errno != ERANGE)
2002 if (tolower(*endptr) == 'k')
2003 {
2004 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2005 else lvalue *= 1024;
2006 endptr++;
2007 }
2008 else if (tolower(*endptr) == 'm')
2009 {
2010 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2011 errno = ERANGE;
2012 else lvalue *= 1024*1024;
2013 endptr++;
2014 }
2015 else if (tolower(*endptr) == 'g')
2016 {
2017 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2018 errno = ERANGE;
2019 else lvalue *= 1024*1024*1024;
2020 endptr++;
2021 }
2022
2023 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2024 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2025 "absolute value of integer \"%s\" is too large (overflow)", s);
2026
2027 while (isspace(*endptr)) endptr++;
2028 if (*endptr != 0)
2029 extra_chars_error(endptr, inttype, US"integer value for ", name);
2030
2031 value = (int)lvalue;
2032 }
2033
2034 if (data_block == NULL)
2035 *((int *)(ol->value)) = value;
2036 else
2037 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2038 break;
2039
2040 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2041 and G. */
2042 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2043
2044 case opt_Kint:
2045 {
2046 uschar *endptr;
2047 errno = 0;
2048 value = strtol(CS s, CSS &endptr, intbase);
2049
2050 if (endptr == s)
2051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2052 inttype, name);
2053
2054 if (errno != ERANGE)
2055 if (tolower(*endptr) == 'g')
2056 {
2057 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2058 errno = ERANGE;
2059 else
2060 value *= 1024*1024;
2061 endptr++;
2062 }
2063 else if (tolower(*endptr) == 'm')
2064 {
2065 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2066 errno = ERANGE;
2067 else
2068 value *= 1024;
2069 endptr++;
2070 }
2071 else if (tolower(*endptr) == 'k')
2072 endptr++;
2073 else
2074 value = (value + 512)/1024;
2075
2076 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2077 "absolute value of integer \"%s\" is too large (overflow)", s);
2078
2079 while (isspace(*endptr)) endptr++;
2080 if (*endptr != 0)
2081 extra_chars_error(endptr, inttype, US"integer value for ", name);
2082 }
2083
2084 if (data_block == NULL)
2085 *((int *)(ol->value)) = value;
2086 else
2087 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2088 break;
2089
2090 /* Fixed-point number: held to 3 decimal places. */
2091
2092 case opt_fixed:
2093 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2094 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2095 "fixed-point number expected for %s", name);
2096
2097 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2098 "integer \"%s\" is too large (overflow)", s);
2099
2100 value *= 1000;
2101
2102 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2103 "integer \"%s\" is too large (overflow)", s);
2104
2105 if (s[count] == '.')
2106 {
2107 int d = 100;
2108 while (isdigit(s[++count]))
2109 {
2110 value += (s[count] - '0') * d;
2111 d /= 10;
2112 }
2113 }
2114
2115 while (isspace(s[count])) count++;
2116
2117 if (s[count] != 0)
2118 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2119
2120 if (data_block == NULL)
2121 *((int *)(ol->value)) = value;
2122 else
2123 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2124 break;
2125
2126 /* There's a special routine to read time values. */
2127
2128 case opt_time:
2129 value = readconf_readtime(s, 0, FALSE);
2130 if (value < 0)
2131 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2132 name);
2133 if (data_block == NULL)
2134 *((int *)(ol->value)) = value;
2135 else
2136 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2137 break;
2138
2139 /* A time list is a list of colon-separated times, with the first
2140 element holding the size of the list and the second the number of
2141 entries used. */
2142
2143 case opt_timelist:
2144 {
2145 int count = 0;
2146 int *list = (data_block == NULL)?
2147 (int *)(ol->value) :
2148 (int *)((uschar *)data_block + (long int)(ol->value));
2149
2150 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2151 {
2152 int terminator = 0;
2153 uschar *snext = Ustrchr(s, ':');
2154 if (snext != NULL)
2155 {
2156 uschar *ss = snext;
2157 while (ss > s && isspace(ss[-1])) ss--;
2158 terminator = *ss;
2159 }
2160 value = readconf_readtime(s, terminator, FALSE);
2161 if (value < 0)
2162 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2163 name);
2164 if (count > 1 && value <= list[count])
2165 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2166 "time value out of order for %s", name);
2167 list[count+1] = value;
2168 if (snext == NULL) break;
2169 s = snext + 1;
2170 while (isspace(*s)) s++;
2171 }
2172
2173 if (count > list[0] - 2)
2174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2175 name);
2176 if (count > 0 && list[2] == 0) count = 0;
2177 list[1] = count;
2178 break;
2179 }
2180
2181 case opt_func:
2182 {
2183 void (*fn)() = ol->value;
2184 fn(name, s);
2185 break;
2186 }
2187 }
2188
2189 return TRUE;
2190 }
2191
2192
2193
2194 /*************************************************
2195 * Print a time value *
2196 *************************************************/
2197
2198 /*
2199 Argument: a time value in seconds
2200 Returns: pointer to a fixed buffer containing the time as a string,
2201 in readconf_readtime() format
2202 */
2203
2204 uschar *
2205 readconf_printtime(int t)
2206 {
2207 int s, m, h, d, w;
2208 uschar *p = time_buffer;
2209
2210 if (t < 0)
2211 {
2212 *p++ = '-';
2213 t = -t;
2214 }
2215
2216 s = t % 60;
2217 t /= 60;
2218 m = t % 60;
2219 t /= 60;
2220 h = t % 24;
2221 t /= 24;
2222 d = t % 7;
2223 w = t/7;
2224
2225 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2226 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2227 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2228 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2229 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2230
2231 return time_buffer;
2232 }
2233
2234
2235
2236 /*************************************************
2237 * Print an individual option value *
2238 *************************************************/
2239
2240 /* This is used by the -bP option, so prints to the standard output.
2241 The entire options list is passed in as an argument, because some options come
2242 in pairs - typically uid/gid settings, which can either be explicit numerical
2243 values, or strings to be expanded later. If the numerical value is unset,
2244 search for "*expand_<name>" to see if there is a string equivalent.
2245
2246 Arguments:
2247 ol option entry, or NULL for an unknown option
2248 name option name
2249 options_block NULL for main configuration options; otherwise points to
2250 a driver block; if the option doesn't have opt_public
2251 set, then options_block->options_block is where the item
2252 resides.
2253 oltop points to the option list in which ol exists
2254 last one more than the offset of the last entry in optop
2255 no_labels do not show "foo = " at the start.
2256
2257 Returns: nothing
2258 */
2259
2260 static void
2261 print_ol(optionlist *ol, uschar *name, void *options_block,
2262 optionlist *oltop, int last, BOOL no_labels)
2263 {
2264 struct passwd *pw;
2265 struct group *gr;
2266 optionlist *ol2;
2267 void *value;
2268 uid_t *uidlist;
2269 gid_t *gidlist;
2270 uschar *s;
2271 uschar name2[64];
2272
2273 if (ol == NULL)
2274 {
2275 printf("%s is not a known option\n", name);
2276 return;
2277 }
2278
2279 /* Non-admin callers cannot see options that have been flagged secure by the
2280 "hide" prefix. */
2281
2282 if (!admin_user && (ol->type & opt_secure) != 0)
2283 {
2284 if (no_labels)
2285 printf("%s\n", hidden);
2286 else
2287 printf("%s = %s\n", name, hidden);
2288 return;
2289 }
2290
2291 /* Else show the value of the option */
2292
2293 value = ol->value;
2294 if (options_block != NULL)
2295 {
2296 if ((ol->type & opt_public) == 0)
2297 options_block = (void *)(((driver_instance *)options_block)->options_block);
2298 value = (void *)((uschar *)options_block + (long int)value);
2299 }
2300
2301 switch(ol->type & opt_mask)
2302 {
2303 case opt_stringptr:
2304 case opt_rewrite: /* Show the text value */
2305 s = *((uschar **)value);
2306 if (!no_labels) printf("%s = ", name);
2307 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2308 break;
2309
2310 case opt_int:
2311 if (!no_labels) printf("%s = ", name);
2312 printf("%d\n", *((int *)value));
2313 break;
2314
2315 case opt_mkint:
2316 {
2317 int x = *((int *)value);
2318 if (x != 0 && (x & 1023) == 0)
2319 {
2320 int c = 'K';
2321 x >>= 10;
2322 if ((x & 1023) == 0)
2323 {
2324 c = 'M';
2325 x >>= 10;
2326 }
2327 if (!no_labels) printf("%s = ", name);
2328 printf("%d%c\n", x, c);
2329 }
2330 else
2331 {
2332 if (!no_labels) printf("%s = ", name);
2333 printf("%d\n", x);
2334 }
2335 }
2336 break;
2337
2338 case opt_Kint:
2339 {
2340 int x = *((int *)value);
2341 if (!no_labels) printf("%s = ", name);
2342 if (x == 0) printf("0\n");
2343 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2344 else printf("%dK\n", x);
2345 }
2346 break;
2347
2348 case opt_octint:
2349 if (!no_labels) printf("%s = ", name);
2350 printf("%#o\n", *((int *)value));
2351 break;
2352
2353 /* Can be negative only when "unset", in which case integer */
2354
2355 case opt_fixed:
2356 {
2357 int x = *((int *)value);
2358 int f = x % 1000;
2359 int d = 100;
2360 if (x < 0) printf("%s =\n", name); else
2361 {
2362 if (!no_labels) printf("%s = ", name);
2363 printf("%d.", x/1000);
2364 do
2365 {
2366 printf("%d", f/d);
2367 f %= d;
2368 d /= 10;
2369 }
2370 while (f != 0);
2371 printf("\n");
2372 }
2373 }
2374 break;
2375
2376 /* If the numerical value is unset, try for the string value */
2377
2378 case opt_expand_uid:
2379 if (! *get_set_flag(name, oltop, last, options_block))
2380 {
2381 sprintf(CS name2, "*expand_%.50s", name);
2382 ol2 = find_option(name2, oltop, last);
2383 if (ol2 != NULL)
2384 {
2385 void *value2 = ol2->value;
2386 if (options_block != NULL)
2387 value2 = (void *)((uschar *)options_block + (long int)value2);
2388 s = *((uschar **)value2);
2389 if (!no_labels) printf("%s = ", name);
2390 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2391 break;
2392 }
2393 }
2394
2395 /* Else fall through */
2396
2397 case opt_uid:
2398 if (!no_labels) printf("%s = ", name);
2399 if (! *get_set_flag(name, oltop, last, options_block))
2400 printf("\n");
2401 else
2402 {
2403 pw = getpwuid(*((uid_t *)value));
2404 if (pw == NULL)
2405 printf("%ld\n", (long int)(*((uid_t *)value)));
2406 else printf("%s\n", pw->pw_name);
2407 }
2408 break;
2409
2410 /* If the numerical value is unset, try for the string value */
2411
2412 case opt_expand_gid:
2413 if (! *get_set_flag(name, oltop, last, options_block))
2414 {
2415 sprintf(CS name2, "*expand_%.50s", name);
2416 ol2 = find_option(name2, oltop, last);
2417 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2418 {
2419 void *value2 = ol2->value;
2420 if (options_block != NULL)
2421 value2 = (void *)((uschar *)options_block + (long int)value2);
2422 s = *((uschar **)value2);
2423 if (!no_labels) printf("%s = ", name);
2424 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2425 break;
2426 }
2427 }
2428
2429 /* Else fall through */
2430
2431 case opt_gid:
2432 if (!no_labels) printf("%s = ", name);
2433 if (! *get_set_flag(name, oltop, last, options_block))
2434 printf("\n");
2435 else
2436 {
2437 gr = getgrgid(*((int *)value));
2438 if (gr == NULL)
2439 printf("%ld\n", (long int)(*((int *)value)));
2440 else printf("%s\n", gr->gr_name);
2441 }
2442 break;
2443
2444 case opt_uidlist:
2445 uidlist = *((uid_t **)value);
2446 if (!no_labels) printf("%s =", name);
2447 if (uidlist != NULL)
2448 {
2449 int i;
2450 uschar sep = ' ';
2451 if (no_labels) sep = '\0';
2452 for (i = 1; i <= (int)(uidlist[0]); i++)
2453 {
2454 uschar *name = NULL;
2455 pw = getpwuid(uidlist[i]);
2456 if (pw != NULL) name = US pw->pw_name;
2457 if (sep != '\0') printf("%c", sep);
2458 if (name != NULL) printf("%s", name);
2459 else printf("%ld", (long int)(uidlist[i]));
2460 sep = ':';
2461 }
2462 }
2463 printf("\n");
2464 break;
2465
2466 case opt_gidlist:
2467 gidlist = *((gid_t **)value);
2468 if (!no_labels) printf("%s =", name);
2469 if (gidlist != NULL)
2470 {
2471 int i;
2472 uschar sep = ' ';
2473 if (no_labels) sep = '\0';
2474 for (i = 1; i <= (int)(gidlist[0]); i++)
2475 {
2476 uschar *name = NULL;
2477 gr = getgrgid(gidlist[i]);
2478 if (gr != NULL) name = US gr->gr_name;
2479 if (sep != '\0') printf("%c", sep);
2480 if (name != NULL) printf("%s", name);
2481 else printf("%ld", (long int)(gidlist[i]));
2482 sep = ':';
2483 }
2484 }
2485 printf("\n");
2486 break;
2487
2488 case opt_time:
2489 if (!no_labels) printf("%s = ", name);
2490 printf("%s\n", readconf_printtime(*((int *)value)));
2491 break;
2492
2493 case opt_timelist:
2494 {
2495 int i;
2496 int *list = (int *)value;
2497 if (!no_labels) printf("%s = ", name);
2498 for (i = 0; i < list[1]; i++)
2499 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2500 printf("\n");
2501 }
2502 break;
2503
2504 case opt_bit:
2505 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2506 "" : "no_", name);
2507 break;
2508
2509 case opt_expand_bool:
2510 sprintf(CS name2, "*expand_%.50s", name);
2511 ol2 = find_option(name2, oltop, last);
2512 if (ol2 != NULL && ol2->value != NULL)
2513 {
2514 void *value2 = ol2->value;
2515 if (options_block != NULL)
2516 value2 = (void *)((uschar *)options_block + (long int)value2);
2517 s = *((uschar **)value2);
2518 if (s != NULL)
2519 {
2520 if (!no_labels) printf("%s = ", name);
2521 printf("%s\n", string_printing(s));
2522 break;
2523 }
2524 /* s == NULL => string not set; fall through */
2525 }
2526
2527 /* Fall through */
2528
2529 case opt_bool:
2530 case opt_bool_verify:
2531 case opt_bool_set:
2532 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2533 break;
2534 }
2535 }
2536
2537
2538
2539 /*************************************************
2540 * Print value from main configuration *
2541 *************************************************/
2542
2543 /* This function, called as a result of encountering the -bP option,
2544 causes the value of any main configuration variable to be output if the
2545 second argument is NULL. There are some special values:
2546
2547 all print all main configuration options
2548 config_file print the name of the configuration file
2549 (configure_file will still work, for backward
2550 compatibility)
2551 routers print the routers' configurations
2552 transports print the transports' configuration
2553 authenticators print the authenticators' configuration
2554 macros print the macros' configuration
2555 router_list print a list of router names
2556 transport_list print a list of transport names
2557 authenticator_list print a list of authentication mechanism names
2558 macro_list print a list of macro names
2559 +name print a named list item
2560 local_scan print the local_scan options
2561 config print the configuration as it is parsed
2562 environment print the used execution environment
2563
2564 If the second argument is not NULL, it must be one of "router", "transport",
2565 "authenticator" or "macro" in which case the first argument identifies the
2566 driver whose options are to be printed.
2567
2568 Arguments:
2569 name option name if type == NULL; else driver name
2570 type NULL or driver type name, as described above
2571 no_labels avoid the "foo = " at the start of an item
2572
2573 Returns: nothing
2574 */
2575
2576 void
2577 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2578 {
2579 BOOL names_only = FALSE;
2580 optionlist *ol;
2581 optionlist *ol2 = NULL;
2582 driver_instance *d = NULL;
2583 macro_item *m;
2584 int size = 0;
2585
2586 if (type == NULL)
2587 {
2588 if (*name == '+')
2589 {
2590 int i;
2591 tree_node *t;
2592 BOOL found = FALSE;
2593 static uschar *types[] = { US"address", US"domain", US"host",
2594 US"localpart" };
2595 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2596 &hostlist_anchor, &localpartlist_anchor };
2597
2598 for (i = 0; i < 4; i++)
2599 {
2600 t = tree_search(*(anchors[i]), name+1);
2601 if (t != NULL)
2602 {
2603 found = TRUE;
2604 if (no_labels)
2605 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2606 else
2607 printf("%slist %s = %s\n", types[i], name+1,
2608 ((namedlist_block *)(t->data.ptr))->string);
2609 }
2610 }
2611
2612 if (!found)
2613 printf("no address, domain, host, or local part list called \"%s\" "
2614 "exists\n", name+1);
2615
2616 return;
2617 }
2618
2619 if ( Ustrcmp(name, "configure_file") == 0
2620 || Ustrcmp(name, "config_file") == 0)
2621 {
2622 printf("%s\n", CS config_main_filename);
2623 return;
2624 }
2625
2626 if (Ustrcmp(name, "all") == 0)
2627 {
2628 for (ol = optionlist_config;
2629 ol < optionlist_config + optionlist_config_size; ol++)
2630 {
2631 if ((ol->type & opt_hidden) == 0)
2632 print_ol(ol, US ol->name, NULL,
2633 optionlist_config, optionlist_config_size,
2634 no_labels);
2635 }
2636 return;
2637 }
2638
2639 if (Ustrcmp(name, "local_scan") == 0)
2640 {
2641 #ifndef LOCAL_SCAN_HAS_OPTIONS
2642 printf("local_scan() options are not supported\n");
2643 #else
2644 for (ol = local_scan_options;
2645 ol < local_scan_options + local_scan_options_count; ol++)
2646 {
2647 print_ol(ol, US ol->name, NULL, local_scan_options,
2648 local_scan_options_count, no_labels);
2649 }
2650 #endif
2651 return;
2652 }
2653
2654 if (Ustrcmp(name, "config") == 0)
2655 {
2656 print_config(admin_user, no_labels);
2657 return;
2658 }
2659
2660 if (Ustrcmp(name, "routers") == 0)
2661 {
2662 type = US"router";
2663 name = NULL;
2664 }
2665 else if (Ustrcmp(name, "transports") == 0)
2666 {
2667 type = US"transport";
2668 name = NULL;
2669 }
2670
2671 else if (Ustrcmp(name, "authenticators") == 0)
2672 {
2673 type = US"authenticator";
2674 name = NULL;
2675 }
2676
2677 else if (Ustrcmp(name, "macros") == 0)
2678 {
2679 type = US"macro";
2680 name = NULL;
2681 }
2682
2683 else if (Ustrcmp(name, "router_list") == 0)
2684 {
2685 type = US"router";
2686 name = NULL;
2687 names_only = TRUE;
2688 }
2689
2690 else if (Ustrcmp(name, "transport_list") == 0)
2691 {
2692 type = US"transport";
2693 name = NULL;
2694 names_only = TRUE;
2695 }
2696
2697 else if (Ustrcmp(name, "authenticator_list") == 0)
2698 {
2699 type = US"authenticator";
2700 name = NULL;
2701 names_only = TRUE;
2702 }
2703
2704 else if (Ustrcmp(name, "macro_list") == 0)
2705 {
2706 type = US"macro";
2707 name = NULL;
2708 names_only = TRUE;
2709 }
2710
2711 else if (Ustrcmp(name, "environment") == 0)
2712 {
2713 if (environ)
2714 {
2715 uschar ** p;
2716 for (p = USS environ; *p; p++) ;
2717 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2718
2719 for (p = USS environ; *p; p++)
2720 {
2721 uschar * q;
2722 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2723 puts(CS *p);
2724 }
2725 }
2726 return;
2727 }
2728
2729 else
2730 {
2731 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2732 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2733 return;
2734 }
2735 }
2736
2737 /* Handle the options for a router or transport. Skip options that are flagged
2738 as hidden. Some of these are options with names starting with '*', used for
2739 internal alternative representations of other options (which the printing
2740 function will sort out). Others are synonyms kept for backward compatibility.
2741 */
2742
2743 if (Ustrcmp(type, "router") == 0)
2744 {
2745 d = (driver_instance *)routers;
2746 ol2 = optionlist_routers;
2747 size = optionlist_routers_size;
2748 }
2749 else if (Ustrcmp(type, "transport") == 0)
2750 {
2751 d = (driver_instance *)transports;
2752 ol2 = optionlist_transports;
2753 size = optionlist_transports_size;
2754 }
2755 else if (Ustrcmp(type, "authenticator") == 0)
2756 {
2757 d = (driver_instance *)auths;
2758 ol2 = optionlist_auths;
2759 size = optionlist_auths_size;
2760 }
2761
2762 else if (Ustrcmp(type, "macro") == 0)
2763 {
2764 /* People store passwords in macros and they were previously not available
2765 for printing. So we have an admin_users restriction. */
2766 if (!admin_user)
2767 {
2768 fprintf(stderr, "exim: permission denied\n");
2769 exit(EXIT_FAILURE);
2770 }
2771 for (m = macros; m != NULL; m = m->next)
2772 {
2773 if (name == NULL || Ustrcmp(name, m->name) == 0)
2774 {
2775 if (names_only)
2776 printf("%s\n", CS m->name);
2777 else
2778 printf("%s=%s\n", CS m->name, CS m->replacement);
2779 if (name != NULL)
2780 return;
2781 }
2782 }
2783 if (name != NULL)
2784 printf("%s %s not found\n", type, name);
2785 return;
2786 }
2787
2788 if (names_only)
2789 {
2790 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2791 return;
2792 }
2793
2794 /* Either search for a given driver, or print all of them */
2795
2796 for (; d != NULL; d = d->next)
2797 {
2798 if (name == NULL)
2799 printf("\n%s %s:\n", d->name, type);
2800 else if (Ustrcmp(d->name, name) != 0) continue;
2801
2802 for (ol = ol2; ol < ol2 + size; ol++)
2803 {
2804 if ((ol->type & opt_hidden) == 0)
2805 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2806 }
2807
2808 for (ol = d->info->options;
2809 ol < d->info->options + *(d->info->options_count); ol++)
2810 {
2811 if ((ol->type & opt_hidden) == 0)
2812 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2813 }
2814 if (name != NULL) return;
2815 }
2816 if (name != NULL) printf("%s %s not found\n", type, name);
2817 }
2818
2819
2820
2821 /*************************************************
2822 * Read a named list item *
2823 *************************************************/
2824
2825 /* This function reads a name and a list (i.e. string). The name is used to
2826 save the list in a tree, sorted by its name. Each entry also has a number,
2827 which can be used for caching tests, but if the string contains any expansion
2828 items other than $key, the number is set negative to inhibit caching. This
2829 mechanism is used for domain, host, and address lists that are referenced by
2830 the "+name" syntax.
2831
2832 Arguments:
2833 anchorp points to the tree anchor
2834 numberp points to the current number for this tree
2835 max the maximum number permitted
2836 s the text of the option line, starting immediately after the name
2837 of the list type
2838 tname the name of the list type, for messages
2839
2840 Returns: nothing
2841 */
2842
2843 static void
2844 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2845 uschar *tname)
2846 {
2847 BOOL forcecache = FALSE;
2848 uschar *ss;
2849 tree_node *t;
2850 namedlist_block *nb = store_get(sizeof(namedlist_block));
2851
2852 if (Ustrncmp(s, "_cache", 6) == 0)
2853 {
2854 forcecache = TRUE;
2855 s += 6;
2856 }
2857
2858 if (!isspace(*s))
2859 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2860
2861 if (*numberp >= max)
2862 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2863 tname, max);
2864
2865 while (isspace(*s)) s++;
2866 ss = s;
2867 while (isalnum(*s) || *s == '_') s++;
2868 t = store_get(sizeof(tree_node) + s-ss);
2869 Ustrncpy(t->name, ss, s-ss);
2870 t->name[s-ss] = 0;
2871 while (isspace(*s)) s++;
2872
2873 if (!tree_insertnode(anchorp, t))
2874 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2875 "duplicate name \"%s\" for a named %s", t->name, tname);
2876
2877 t->data.ptr = nb;
2878 nb->number = *numberp;
2879 *numberp += 1;
2880
2881 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2882 "missing '=' after \"%s\"", t->name);
2883 while (isspace(*s)) s++;
2884 nb->string = read_string(s, t->name);
2885 nb->cache_data = NULL;
2886
2887 /* Check the string for any expansions; if any are found, mark this list
2888 uncacheable unless the user has explicited forced caching. */
2889
2890 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2891 }
2892
2893
2894
2895
2896 /*************************************************
2897 * Unpick data for a rate limit *
2898 *************************************************/
2899
2900 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2901 separate values.
2902
2903 Arguments:
2904 s string, in the form t,b,f,l
2905 where t is the threshold (integer)
2906 b is the initial delay (time)
2907 f is the multiplicative factor (fixed point)
2908 k is the maximum time (time)
2909 threshold where to store threshold
2910 base where to store base in milliseconds
2911 factor where to store factor in milliseconds
2912 limit where to store limit
2913
2914 Returns: nothing (panics on error)
2915 */
2916
2917 static void
2918 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2919 int *limit)
2920 {
2921 uschar bstring[16], lstring[16];
2922
2923 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2924 factor, lstring) == 4)
2925 {
2926 *base = readconf_readtime(bstring, 0, TRUE);
2927 *limit = readconf_readtime(lstring, 0, TRUE);
2928 if (*base >= 0 && *limit >= 0) return;
2929 }
2930 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2931 }
2932
2933
2934
2935
2936 /*************************************************
2937 * Drop privs for checking TLS config *
2938 *************************************************/
2939
2940 /* We want to validate TLS options during readconf, but do not want to be
2941 root when we call into the TLS library, in case of library linkage errors
2942 which cause segfaults; before this check, those were always done as the Exim
2943 runtime user and it makes sense to continue with that.
2944
2945 Assumes: tls_require_ciphers has been set, if it will be
2946 exim_user has been set, if it will be
2947 exim_group has been set, if it will be
2948
2949 Returns: bool for "okay"; false will cause caller to immediately exit.
2950 */
2951
2952 #ifdef SUPPORT_TLS
2953 static BOOL
2954 tls_dropprivs_validate_require_cipher(BOOL nowarn)
2955 {
2956 const uschar *errmsg;
2957 pid_t pid;
2958 int rc, status;
2959 void (*oldsignal)(int);
2960
2961 /* If TLS will never be used, no point checking ciphers */
2962
2963 if ( !tls_advertise_hosts
2964 || !*tls_advertise_hosts
2965 || Ustrcmp(tls_advertise_hosts, ":") == 0
2966 )
2967 return TRUE;
2968 else if (!nowarn && !tls_certificate)
2969 log_write(0, LOG_MAIN,
2970 "Warning: No server certificate defined; will use a selfsigned one.\n"
2971 " Suggested action: either install a certificate or change tls_advertise_hosts option");
2972
2973 oldsignal = signal(SIGCHLD, SIG_DFL);
2974
2975 fflush(NULL);
2976 if ((pid = fork()) < 0)
2977 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2978
2979 if (pid == 0)
2980 {
2981 /* in some modes, will have dropped privilege already */
2982 if (!geteuid())
2983 exim_setugid(exim_uid, exim_gid, FALSE,
2984 US"calling tls_validate_require_cipher");
2985
2986 errmsg = tls_validate_require_cipher();
2987 if (errmsg)
2988 {
2989 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2990 "tls_require_ciphers invalid: %s", errmsg);
2991 }
2992 fflush(NULL);
2993 _exit(0);
2994 }
2995
2996 do {
2997 rc = waitpid(pid, &status, 0);
2998 } while (rc < 0 && errno == EINTR);
2999
3000 DEBUG(D_tls)
3001 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3002 (int)pid, status);
3003
3004 signal(SIGCHLD, oldsignal);
3005
3006 return status == 0;
3007 }
3008 #endif /* SUPPORT_TLS */
3009
3010
3011
3012
3013 /*************************************************/
3014 /* Create compile-time feature macros */
3015 static void
3016 readconf_features(void)
3017 {
3018 /* Probably we could work out a static initialiser for wherever
3019 macros are stored, but this will do for now. Some names are awkward
3020 due to conflicts with other common macros. */
3021
3022 #ifdef SUPPORT_CRYPTEQ
3023 read_macro_assignment(US"_HAVE_CRYPTEQ=y");
3024 #endif
3025 #if HAVE_ICONV
3026 read_macro_assignment(US"_HAVE_ICONV=y");
3027 #endif
3028 #if HAVE_IPV6
3029 read_macro_assignment(US"_HAVE_IPV6=y");
3030 #endif
3031 #ifdef HAVE_SETCLASSRESOURCES
3032 read_macro_assignment(US"_HAVE_SETCLASSRESOURCES=y");
3033 #endif
3034 #ifdef SUPPORT_PAM
3035 read_macro_assignment(US"_HAVE_PAM=y");
3036 #endif
3037 #ifdef EXIM_PERL
3038 read_macro_assignment(US"_HAVE_PERL=y");
3039 #endif
3040 #ifdef EXPAND_DLFUNC
3041 read_macro_assignment(US"_HAVE_DLFUNC=y");
3042 #endif
3043 #ifdef USE_TCP_WRAPPERS
3044 read_macro_assignment(US"_HAVE_TCPWRAPPERS=y");
3045 #endif
3046 #ifdef SUPPORT_TLS
3047 read_macro_assignment(US"_HAVE_TLS=y");
3048 # ifdef USE_GNUTLS
3049 read_macro_assignment(US"_HAVE_GNUTLS=y");
3050 # else
3051 read_macro_assignment(US"_HAVE_OPENSSL=y");
3052 # endif
3053 #endif
3054 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
3055 read_macro_assignment(US"_HAVE_TRANSLATE_IP_ADDRESS=y");
3056 #endif
3057 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
3058 read_macro_assignment(US"_HAVE_MOVE_FROZEN_MESSAGES=y");
3059 #endif
3060 #ifdef WITH_CONTENT_SCAN
3061 read_macro_assignment(US"_HAVE_CONTENT_SCANNING=y");
3062 #endif
3063 #ifndef DISABLE_DKIM
3064 read_macro_assignment(US"_HAVE_DKIM=y");
3065 #endif
3066 #ifndef DISABLE_DNSSEC
3067 read_macro_assignment(US"_HAVE_DNSSEC=y");
3068 #endif
3069 #ifndef DISABLE_EVENT
3070 read_macro_assignment(US"_HAVE_Event=y");
3071 #endif
3072 #ifdef SUPPORT_I18N
3073 read_macro_assignment(US"_HAVE_I18N=y");
3074 #endif
3075 #ifndef DISABLE_OCSP
3076 read_macro_assignment(US"_HAVE_OCSP=y");
3077 #endif
3078 #ifndef DISABLE_PRDR
3079 read_macro_assignment(US"_HAVE_PRDR=y");
3080 #endif
3081 #ifdef SUPPORT_PROXY
3082 read_macro_assignment(US"_HAVE_PROXY=y");
3083 #endif
3084 #ifdef SUPPORT_SOCKS
3085 read_macro_assignment(US"_HAVE_SOCKS=y");
3086 #endif
3087 #ifdef EXPERIMENTAL_LMDB
3088 read_macro_assignment(US"_HAVE_LMDB=y");
3089 #endif
3090 #ifdef EXPERIMENTAL_SPF
3091 read_macro_assignment(US"_HAVE_SPF=y");
3092 #endif
3093 #ifdef EXPERIMENTAL_SRS
3094 read_macro_assignment(US"_HAVE_SRS=y");
3095 #endif
3096 #ifdef EXPERIMENTAL_BRIGHTMAIL
3097 read_macro_assignment(US"_HAVE_BRIGHTMAIL=y");
3098 #endif
3099 #ifdef EXPERIMENTAL_DANE
3100 read_macro_assignment(US"_HAVE_DANE=y");
3101 #endif
3102 #ifdef EXPERIMENTAL_DCC
3103 read_macro_assignment(US"_HAVE_DCC=y");
3104 #endif
3105 #ifdef EXPERIMENTAL_DMARC
3106 read_macro_assignment(US"_HAVE_DMARC=y");
3107 #endif
3108 #ifdef EXPERIMENTAL_DSN_INFO
3109 read_macro_assignment(US"_HAVE_DSN_INFO=y");
3110 #endif
3111
3112 #ifdef LOOKUP_LSEARCH
3113 read_macro_assignment(US"_HAVE_LKUP_LSEARCH=y");
3114 #endif
3115 #ifdef LOOKUP_CDB
3116 read_macro_assignment(US"_HAVE_LKUP_CDB=y");
3117 #endif
3118 #ifdef LOOKUP_DBM
3119 read_macro_assignment(US"_HAVE_LKUP_DBM=y");
3120 #endif
3121 #ifdef LOOKUP_DNSDB
3122 read_macro_assignment(US"_HAVE_LKUP_DNSDB=y");
3123 #endif
3124 #ifdef LOOKUP_DSEARCH
3125 read_macro_assignment(US"_HAVE_LKUP_DSEARCH=y");
3126 #endif
3127 #ifdef LOOKUP_IBASE
3128 read_macro_assignment(US"_HAVE_LKUP_IBASE=y");
3129 #endif
3130 #ifdef LOOKUP_LDAP
3131 read_macro_assignment(US"_HAVE_LKUP_LDAP=y");
3132 #endif
3133 #ifdef EXPERIMENTAL_LMDB
3134 read_macro_assignment(US"_HAVE_LKUP_LMDB=y");
3135 #endif
3136 #ifdef LOOKUP_MYSQL
3137 read_macro_assignment(US"_HAVE_LKUP_MYSQL=y");
3138 #endif
3139 #ifdef LOOKUP_NIS
3140 read_macro_assignment(US"_HAVE_LKUP_NIS=y");
3141 #endif
3142 #ifdef LOOKUP_NISPLUS
3143 read_macro_assignment(US"_HAVE_LKUP_NISPLUS=y");
3144 #endif
3145 #ifdef LOOKUP_ORACLE
3146 read_macro_assignment(US"_HAVE_LKUP_ORACLE=y");
3147 #endif
3148 #ifdef LOOKUP_PASSWD
3149 read_macro_assignment(US"_HAVE_LKUP_PASSWD=y");
3150 #endif
3151 #ifdef LOOKUP_PGSQL
3152 read_macro_assignment(US"_HAVE_LKUP_PGSQL=y");
3153 #endif
3154 #ifdef LOOKUP_REDIS
3155 read_macro_assignment(US"_HAVE_LKUP_REDIS=y");
3156 #endif
3157 #ifdef LOOKUP_SQLITE
3158 read_macro_assignment(US"_HAVE_LKUP_SQLITE=y");
3159 #endif
3160 #ifdef LOOKUP_TESTDB
3161 read_macro_assignment(US"_HAVE_LKUP_TESTDB=y");
3162 #endif
3163 #ifdef LOOKUP_WHOSON
3164 read_macro_assignment(US"_HAVE_LKUP_WHOSON=y");
3165 #endif
3166
3167 #ifdef AUTH_CRAM_MD5
3168 read_macro_assignment(US"_HAVE_AUTH_CRAM_MD5=y");
3169 #endif
3170 #ifdef AUTH_CYRUS_SASL
3171 read_macro_assignment(US"_HAVE_AUTH_CYRUS_SASL=y");
3172 #endif
3173 #ifdef AUTH_DOVECOT
3174 read_macro_assignment(US"_HAVE_AUTH_DOVECOT=y");
3175 #endif
3176 #ifdef AUTH_GSASL
3177 read_macro_assignment(US"_HAVE_AUTH_GSASL=y");
3178 #endif
3179 #ifdef AUTH_HEIMDAL_GSSAPI
3180 read_macro_assignment(US"_HAVE_AUTH_HEIMDAL_GSSAPI=y");
3181 #endif
3182 #ifdef AUTH_PLAINTEXT
3183 read_macro_assignment(US"_HAVE_AUTH_PLAINTEXT=y");
3184 #endif
3185 #ifdef AUTH_SPA
3186 read_macro_assignment(US"_HAVE_AUTH_SPA=y");
3187 #endif
3188 #ifdef AUTH_TLS
3189 read_macro_assignment(US"_HAVE_AUTH_TLS=y");
3190 #endif
3191
3192 #ifdef ROUTER_ACCEPT
3193 read_macro_assignment(US"_HAVE_RTR_ACCEPT=y");
3194 #endif
3195 #ifdef ROUTER_DNSLOOKUP
3196 read_macro_assignment(US"_HAVE_RTR_DNSLOOKUP=y");
3197 #endif
3198 #ifdef ROUTER_IPLITERAL
3199 read_macro_assignment(US"_HAVE_RTR_IPLITERAL=y");
3200 #endif
3201 #ifdef ROUTER_IPLOOKUP
3202 read_macro_assignment(US"_HAVE_RTR_IPLOOKUP=y");
3203 #endif
3204 #ifdef ROUTER_MANUALROUTE
3205 read_macro_assignment(US"_HAVE_RTR_MANUALROUTE=y");
3206 #endif
3207 #ifdef ROUTER_QUERYPROGRAM
3208 read_macro_assignment(US"_HAVE_RTR_QUERYPROGRAM=y");
3209 #endif
3210 #ifdef ROUTER_REDIRECT
3211 read_macro_assignment(US"_HAVE_RTR_REDRCT=y");
3212 #endif
3213
3214 #ifdef TRANSPORT_APPENDFILE
3215 read_macro_assignment(US"_HAVE_TPT_APPENDFILE=y");
3216 # ifdef SUPPORT_MAILDIR
3217 read_macro_assignment(US"_HAVE_TPT_APPEND_MAILDR=y");
3218 # endif
3219 # ifdef SUPPORT_MAILSTORE
3220 read_macro_assignment(US"_HAVE_TPT_APPEND_MAILSTORE=y");
3221 # endif
3222 # ifdef SUPPORT_MBX
3223 read_macro_assignment(US"_HAVE_TPT_APPEND_MBX=y");
3224 # endif
3225 #endif
3226 #ifdef TRANSPORT_AUTOREPLY
3227 read_macro_assignment(US"_HAVE_TPT_AUTOREPLY=y");
3228 #endif
3229 #ifdef TRANSPORT_LMTP
3230 read_macro_assignment(US"_HAVE_TPT_LMTP=y");
3231 #endif
3232 #ifdef TRANSPORT_PIPE
3233 read_macro_assignment(US"_HAVE_TPT_PIPE=y");
3234 #endif
3235 #ifdef TRANSPORT_SMTP
3236 read_macro_assignment(US"_HAVE_TPT_SMTP=y");
3237 #endif
3238 }
3239
3240
3241 /*************************************************
3242 * Read main configuration options *
3243 *************************************************/
3244
3245 /* This function is the first to be called for configuration reading. It
3246 opens the configuration file and reads general configuration settings until
3247 it reaches the end of the configuration section. The file is then left open so
3248 that the remaining configuration data can subsequently be read if needed for
3249 this run of Exim.
3250
3251 The configuration file must be owned either by root or exim, and be writeable
3252 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3253 in the config file, so the test is done on the compiled in values. A slight
3254 anomaly, to be carefully documented.
3255
3256 The name of the configuration file is taken from a list that is included in the
3257 binary of Exim. It can be altered from the command line, but if that is done,
3258 root privilege is immediately withdrawn unless the caller is root or exim.
3259 The first file on the list that exists is used.
3260
3261 For use on multiple systems that share file systems, first look for a
3262 configuration file whose name has the current node name on the end. If that is
3263 not found, try the generic name. For really contorted configurations, that run
3264 multiple Exims with different uid settings, first try adding the effective uid
3265 before the node name. These complications are going to waste resources on most
3266 systems. Therefore they are available only when requested by compile-time
3267 options. */
3268
3269 void
3270 readconf_main(BOOL nowarn)
3271 {
3272 int sep = 0;
3273 struct stat statbuf;
3274 uschar *s, *filename;
3275 const uschar *list = config_main_filelist;
3276
3277 /* First create compile-time feature macros */
3278 readconf_features();
3279
3280 /* Loop through the possible file names */
3281
3282 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
3283 != NULL)
3284 {
3285
3286 /* Cut out all the fancy processing unless specifically wanted */
3287
3288 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3289 uschar *suffix = filename + Ustrlen(filename);
3290
3291 /* Try for the node-specific file if a node name exists */
3292
3293 #ifdef CONFIGURE_FILE_USE_NODE
3294 struct utsname uts;
3295 if (uname(&uts) >= 0)
3296 {
3297 #ifdef CONFIGURE_FILE_USE_EUID
3298 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3299 config_file = Ufopen(filename, "rb");
3300 if (config_file == NULL)
3301 #endif /* CONFIGURE_FILE_USE_EUID */
3302 {
3303 sprintf(CS suffix, ".%.256s", uts.nodename);
3304 config_file = Ufopen(filename, "rb");
3305 }
3306 }
3307 #endif /* CONFIGURE_FILE_USE_NODE */
3308
3309 /* Otherwise, try the generic name, possibly with the euid added */
3310
3311 #ifdef CONFIGURE_FILE_USE_EUID
3312 if (config_file == NULL)
3313 {
3314 sprintf(CS suffix, ".%ld", (long int)original_euid);
3315 config_file = Ufopen(filename, "rb");
3316 }
3317 #endif /* CONFIGURE_FILE_USE_EUID */
3318
3319 /* Finally, try the unadorned name */
3320
3321 if (config_file == NULL)
3322 {
3323 *suffix = 0;
3324 config_file = Ufopen(filename, "rb");
3325 }
3326 #else /* if neither defined */
3327
3328 /* This is the common case when the fancy processing is not included. */
3329
3330 config_file = Ufopen(filename, "rb");
3331 #endif
3332
3333 /* If the file does not exist, continue to try any others. For any other
3334 error, break out (and die). */
3335
3336 if (config_file != NULL || errno != ENOENT) break;
3337 }
3338
3339 /* Now, once we found and opened our configuration file, we change the directory
3340 to a safe place. Later we change to $spool_directory. */
3341
3342 if (Uchdir("/") < 0)
3343 {
3344 perror("exim: chdir `/': ");
3345 exit(EXIT_FAILURE);
3346 }
3347
3348 /* On success, save the name for verification; config_filename is used when
3349 logging configuration errors (it changes for .included files) whereas
3350 config_main_filename is the name shown by -bP. Failure to open a configuration
3351 file is a serious disaster. */
3352
3353 if (config_file != NULL)
3354 {
3355 uschar *p;
3356 config_filename = config_main_filename = string_copy(filename);
3357
3358 p = Ustrrchr(filename, '/');
3359 config_main_directory = p ? string_copyn(filename, p - filename)
3360 : string_copy(US".");
3361 }
3362 else
3363 {
3364 if (filename == NULL)
3365 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3366 "%s", config_main_filelist);
3367 else
3368 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3369 "configuration file %s", filename));
3370 }
3371
3372 /* Check the status of the file we have opened, if we have retained root
3373 privileges and the file isn't /dev/null (which *should* be 0666). */
3374
3375 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3376 {
3377 if (fstat(fileno(config_file), &statbuf) != 0)
3378 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3379 big_buffer);
3380
3381 if ((statbuf.st_uid != root_uid /* owner not root */
3382 #ifdef CONFIGURE_OWNER
3383 && statbuf.st_uid != config_uid /* owner not the special one */
3384 #endif
3385 ) || /* or */
3386 (statbuf.st_gid != root_gid /* group not root & */
3387 #ifdef CONFIGURE_GROUP
3388 && statbuf.st_gid != config_gid /* group not the special one */
3389 #endif
3390 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3391 /* or */
3392 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3393
3394 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3395 "wrong owner, group, or mode", big_buffer);
3396 }
3397
3398 /* Process the main configuration settings. They all begin with a lower case
3399 letter. If we see something starting with an upper case letter, it is taken as
3400 a macro definition. */
3401
3402 while ((s = get_config_line()) != NULL)
3403 {
3404 if (isupper(s[0])) read_macro_assignment(s);
3405
3406 else if (Ustrncmp(s, "domainlist", 10) == 0)
3407 read_named_list(&domainlist_anchor, &domainlist_count,
3408 MAX_NAMED_LIST, s+10, US"domain list");
3409
3410 else if (Ustrncmp(s, "hostlist", 8) == 0)
3411 read_named_list(&hostlist_anchor, &hostlist_count,
3412 MAX_NAMED_LIST, s+8, US"host list");
3413
3414 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3415 read_named_list(&addresslist_anchor, &addresslist_count,
3416 MAX_NAMED_LIST, s+11, US"address list");
3417
3418 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3419 read_named_list(&localpartlist_anchor, &localpartlist_count,
3420 MAX_NAMED_LIST, s+13, US"local part list");
3421
3422 else
3423 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3424 NULL, US"main option \"%s\" unknown");
3425 }
3426
3427
3428 /* If local_sender_retain is set, local_from_check must be unset. */
3429
3430 if (local_sender_retain && local_from_check)
3431 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3432 "local_sender_retain are set; this combination is not allowed");
3433
3434 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3435 wanted. */
3436
3437 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3438
3439 /* The max retry interval must not be greater than 24 hours. */
3440
3441 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3442
3443 /* remote_max_parallel must be > 0 */
3444
3445 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3446
3447 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3448 start of a new SMTP message. */
3449
3450 freeze_tell_config = freeze_tell;
3451
3452 /* The primary host name may be required for expansion of spool_directory
3453 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3454 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3455 canonize it. Some people like upper case letters in their host names, so we
3456 don't force the case. */
3457
3458 if (primary_hostname == NULL)
3459 {
3460 const uschar *hostname;
3461 struct utsname uts;
3462 if (uname(&uts) < 0)
3463 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3464 hostname = US uts.nodename;
3465
3466 if (Ustrchr(hostname, '.') == NULL)
3467 {
3468 int af = AF_INET;
3469 struct hostent *hostdata;
3470
3471 #if HAVE_IPV6
3472 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3473 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3474 MCL_DOMAIN, TRUE, NULL) != OK))
3475 af = AF_INET6;
3476 #else
3477 af = AF_INET;
3478 #endif
3479
3480 for (;;)
3481 {
3482 #if HAVE_IPV6
3483 #if HAVE_GETIPNODEBYNAME
3484 int error_num;
3485 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3486 #else
3487 hostdata = gethostbyname2(CS hostname, af);
3488 #endif
3489 #else
3490 hostdata = gethostbyname(CS hostname);
3491 #endif
3492
3493 if (hostdata != NULL)
3494 {
3495 hostname = US hostdata->h_name;
3496 break;
3497 }
3498
3499 if (af == AF_INET) break;
3500 af = AF_INET;
3501 }
3502 }
3503
3504 primary_hostname = string_copy(hostname);
3505 }
3506
3507 /* Set up default value for smtp_active_hostname */
3508
3509 smtp_active_hostname = primary_hostname;
3510
3511 /* If spool_directory wasn't set in the build-time configuration, it must have
3512 got set above. Of course, writing to the log may not work if log_file_path is
3513 not set, but it will at least get to syslog or somewhere, with any luck. */
3514
3515 if (*spool_directory == 0)
3516 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3517 "proceed");
3518
3519 /* Expand the spool directory name; it may, for example, contain the primary
3520 host name. Same comment about failure. */
3521
3522 s = expand_string(spool_directory);
3523 if (s == NULL)
3524 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3525 "\"%s\": %s", spool_directory, expand_string_message);
3526 spool_directory = s;
3527
3528 /* Expand log_file_path, which must contain "%s" in any component that isn't
3529 the null string or "syslog". It is also allowed to contain one instance of %D
3530 or %M. However, it must NOT contain % followed by anything else. */
3531
3532 if (*log_file_path != 0)
3533 {
3534 const uschar *ss, *sss;
3535 int sep = ':'; /* Fixed for log file path */
3536 s = expand_string(log_file_path);
3537 if (s == NULL)
3538 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3539 "\"%s\": %s", log_file_path, expand_string_message);
3540
3541 ss = s;
3542 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3543 {
3544 uschar *t;
3545 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3546 t = Ustrstr(sss, "%s");
3547 if (t == NULL)
3548 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3549 "contain \"%%s\"", sss);
3550 *t = 'X';
3551 t = Ustrchr(sss, '%');
3552 if (t != NULL)
3553 {
3554 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3555 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3556 "unexpected \"%%\" character", s);
3557 }
3558 }
3559
3560 log_file_path = s;
3561 }
3562
3563 /* Interpret syslog_facility into an integer argument for 'ident' param to
3564 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3565 leading "log_". */
3566
3567 if (syslog_facility_str != NULL)
3568 {
3569 int i;
3570 uschar *s = syslog_facility_str;
3571
3572 if ((Ustrlen(syslog_facility_str) >= 4) &&
3573 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3574 s += 4;
3575
3576 for (i = 0; i < syslog_list_size; i++)
3577 {
3578 if (strcmpic(s, syslog_list[i].name) == 0)
3579 {
3580 syslog_facility = syslog_list[i].value;
3581 break;
3582 }
3583 }
3584
3585 if (i >= syslog_list_size)
3586 {
3587 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3588 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3589 }
3590 }
3591
3592 /* Expand pid_file_path */
3593
3594 if (*pid_file_path != 0)
3595 {
3596 s = expand_string(pid_file_path);
3597 if (s == NULL)
3598 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3599 "\"%s\": %s", pid_file_path, expand_string_message);
3600 pid_file_path = s;
3601 }
3602
3603 /* Set default value of process_log_path */
3604
3605 if (process_log_path == NULL || *process_log_path =='\0')
3606 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3607
3608 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3609 message. */
3610
3611 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3612
3613 /* Unpick the SMTP rate limiting options, if set */
3614
3615 if (smtp_ratelimit_mail != NULL)
3616 {
3617 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3618 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3619 }
3620
3621 if (smtp_ratelimit_rcpt != NULL)
3622 {
3623 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3624 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3625 }
3626
3627 /* The qualify domains default to the primary host name */
3628
3629 if (qualify_domain_sender == NULL)
3630 qualify_domain_sender = primary_hostname;
3631 if (qualify_domain_recipient == NULL)
3632 qualify_domain_recipient = qualify_domain_sender;
3633
3634 /* Setting system_filter_user in the configuration sets the gid as well if a
3635 name is given, but a numerical value does not. */
3636
3637 if (system_filter_uid_set && !system_filter_gid_set)
3638 {
3639 struct passwd *pw = getpwuid(system_filter_uid);
3640 if (pw == NULL)
3641 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3642 (long int)system_filter_uid);
3643 system_filter_gid = pw->pw_gid;
3644 system_filter_gid_set = TRUE;
3645 }
3646
3647 /* If the errors_reply_to field is set, check that it is syntactically valid
3648 and ensure it contains a domain. */
3649
3650 if (errors_reply_to != NULL)
3651 {
3652 uschar *errmess;
3653 int start, end, domain;
3654 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3655 &start, &end, &domain, FALSE);
3656
3657 if (recipient == NULL)
3658 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3659 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3660
3661 if (domain == 0)
3662 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3663 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3664 }
3665
3666 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3667 smtp_accept_max must also be set. */
3668
3669 if (smtp_accept_max == 0 &&
3670 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3672 "smtp_accept_max must be set if smtp_accept_queue or "
3673 "smtp_accept_max_per_host is set");
3674
3675 /* Set up the host number if anything is specified. It is an expanded string
3676 so that it can be computed from the host name, for example. We do this last
3677 so as to ensure that everything else is set up before the expansion. */
3678
3679 if (host_number_string != NULL)
3680 {
3681 long int n;
3682 uschar *end;
3683 uschar *s = expand_string(host_number_string);
3684 if (s == NULL)
3685 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3686 "failed to expand localhost_number \"%s\": %s",
3687 host_number_string, expand_string_message);
3688 n = Ustrtol(s, &end, 0);
3689 while (isspace(*end)) end++;
3690 if (*end != 0)
3691 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3692 "localhost_number value is not a number: %s", s);
3693 if (n > LOCALHOST_MAX)
3694 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3695 "localhost_number is greater than the maximum allowed value (%d)",
3696 LOCALHOST_MAX);
3697 host_number = n;
3698 }
3699
3700 #ifdef SUPPORT_TLS
3701 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3702
3703 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3704 tls_verify_certificates == NULL)
3705 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3706 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3707 (tls_verify_hosts != NULL)? "" : "try_");
3708
3709 /* This also checks that the library linkage is working and we can call
3710 routines in it, so call even if tls_require_ciphers is unset */
3711 if (!tls_dropprivs_validate_require_cipher(nowarn))
3712 exit(1);
3713
3714 /* Magic number: at time of writing, 1024 has been the long-standing value
3715 used by so many clients, and what Exim used to use always, that it makes
3716 sense to just min-clamp this max-clamp at that. */
3717 if (tls_dh_max_bits < 1024)
3718 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3719 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3720
3721 /* If openssl_options is set, validate it */
3722 if (openssl_options != NULL)
3723 {
3724 # ifdef USE_GNUTLS
3725 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3726 "openssl_options is set but we're using GnuTLS");
3727 # else
3728 long dummy;
3729 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3730 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3731 "openssl_options parse error: %s", openssl_options);
3732 # endif
3733 }
3734 #endif /*SUPPORT_TLS*/
3735
3736 if (!nowarn && !keep_environment && environ && *environ)
3737 log_write(0, LOG_MAIN,
3738 "Warning: purging the environment.\n"
3739 " Suggested action: use keep_environment.");
3740 }
3741
3742
3743
3744 /*************************************************
3745 * Initialize one driver *
3746 *************************************************/
3747
3748 /* This is called once the driver's generic options, if any, have been read.
3749 We can now find the driver, set up defaults for the private options, and
3750 unset any "set" bits in the private options table (which might have been
3751 set by another incarnation of the same driver).
3752
3753 Arguments:
3754 d pointer to driver instance block, with generic
3755 options filled in
3756 drivers_available vector of available drivers
3757 size_of_info size of each block in drivers_available
3758 class class of driver, for error message
3759
3760 Returns: pointer to the driver info block
3761 */
3762
3763 static driver_info *
3764 init_driver(driver_instance *d, driver_info *drivers_available,
3765 int size_of_info, uschar *class)
3766 {
3767 driver_info *dd;
3768
3769 for (dd = drivers_available; dd->driver_name[0] != 0;
3770 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3771 {
3772 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3773 {
3774 int i;
3775 int len = dd->options_len;
3776 d->info = dd;
3777 d->options_block = store_get(len);
3778 memcpy(d->options_block, dd->options_block, len);
3779 for (i = 0; i < *(dd->options_count); i++)
3780 dd->options[i].type &= ~opt_set;
3781 return dd;
3782 }
3783 }
3784
3785 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3786 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3787
3788 return NULL; /* never obeyed */
3789 }
3790
3791
3792
3793
3794 /*************************************************
3795 * Initialize driver list *
3796 *************************************************/
3797
3798 /* This function is called for routers, transports, and authentication
3799 mechanisms. It reads the data from the current point in the configuration file
3800 up to the end of the section, and sets up a chain of instance blocks according
3801 to the file's contents. The file will already have been opened by a call to
3802 readconf_main, and must be left open for subsequent reading of further data.
3803
3804 Any errors cause a panic crash. Note that the blocks with names driver_info and
3805 driver_instance must map the first portions of all the _info and _instance
3806 blocks for this shared code to work.
3807
3808 Arguments:
3809 class "router", "transport", or "authenticator"
3810 anchor &routers, &transports, &auths
3811 drivers_available available drivers
3812 size_of_info size of each info block
3813 instance_default points to default data for an instance
3814 instance_size size of instance block
3815 driver_optionlist generic option list
3816 driver_optionlist_count count of generic option list
3817
3818 Returns: nothing
3819 */
3820
3821 void
3822 readconf_driver_init(
3823 uschar *class,
3824 driver_instance **anchor,
3825 driver_info *drivers_available,
3826 int size_of_info,
3827 void *instance_default,
3828 int instance_size,
3829 optionlist *driver_optionlist,
3830 int driver_optionlist_count)
3831 {
3832 driver_instance **p = anchor;
3833 driver_instance *d = NULL;
3834 uschar *buffer;
3835
3836 while ((buffer = get_config_line()) != NULL)
3837 {
3838 uschar name[64];
3839 uschar *s;
3840
3841 /* Read the first name on the line and test for the start of a new driver. A
3842 macro definition indicates the end of the previous driver. If this isn't the
3843 start of a new driver, the line will be re-read. */
3844
3845 s = readconf_readname(name, sizeof(name), buffer);
3846
3847 /* Handle macro definition, first finishing off the initialization of the
3848 previous driver, if any. */
3849
3850 if (isupper(*name) && *s == '=')
3851 {
3852 if (d)
3853 {
3854 if (!d->driver_name)
3855 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3856 "no driver defined for %s \"%s\"", class, d->name);
3857 (d->info->init)(d);
3858 d = NULL;
3859 }
3860 read_macro_assignment(buffer);
3861 continue;
3862 }
3863
3864 /* If the line starts with a name terminated by a colon, we are at the
3865 start of the definition of a new driver. The rest of the line must be
3866 blank. */
3867
3868 if (*s++ == ':')
3869 {
3870 int i;
3871
3872 /* Finish off initializing the previous driver. */
3873
3874 if (d)
3875 {
3876 if (!d->driver_name)
3877 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3878 "no driver defined for %s \"%s\"", class, d->name);
3879 (d->info->init)(d);
3880 }
3881
3882 /* Check that we haven't already got a driver of this name */
3883
3884 for (d = *anchor; d; d = d->next)
3885 if (Ustrcmp(name, d->name) == 0)
3886 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3887 "there are two %ss called \"%s\"", class, name);
3888
3889 /* Set up a new driver instance data block on the chain, with
3890 its default values installed. */
3891
3892 d = store_get(instance_size);
3893 memcpy(d, instance_default, instance_size);
3894 *p = d;
3895 p = &d->next;
3896 d->name = string_copy(name);
3897
3898 /* Clear out the "set" bits in the generic options */
3899
3900 for (i = 0; i < driver_optionlist_count; i++)
3901 driver_optionlist[i].type &= ~opt_set;
3902
3903 /* Check nothing more on this line, then do the next loop iteration. */
3904
3905 while (isspace(*s)) s++;
3906 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3907 continue;
3908 }
3909
3910 /* Not the start of a new driver. Give an error if we have not set up a
3911 current driver yet. */
3912
3913 if (!d)
3914 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3915
3916 /* First look to see if this is a generic option; if it is "driver",
3917 initialize the driver. If is it not a generic option, we can look for a
3918 private option provided that the driver has been previously set up. */
3919
3920 if (readconf_handle_option(buffer, driver_optionlist,
3921 driver_optionlist_count, d, NULL))
3922 {
3923 if (!d->info && d->driver_name)
3924 init_driver(d, drivers_available, size_of_info, class);
3925 }
3926
3927 /* Handle private options - pass the generic block because some may
3928 live therein. A flag with each option indicates if it is in the public
3929 block. */
3930
3931 else if (d->info)
3932 readconf_handle_option(buffer, d->info->options,
3933 *(d->info->options_count), d, US"option \"%s\" unknown");
3934
3935 /* The option is not generic and the driver name has not yet been given. */
3936
3937 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3938 "(\"driver\" must be specified before any private options)", name);
3939 }
3940
3941 /* Run the initialization function for the final driver. */
3942
3943 if (d)
3944 {
3945 if (!d->driver_name)
3946 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3947 "no driver defined for %s \"%s\"", class, d->name);
3948 (d->info->init)(d);
3949 }
3950 }
3951
3952
3953
3954 /*************************************************
3955 * Check driver dependency *
3956 *************************************************/
3957
3958 /* This function is passed a driver instance and a string. It checks whether
3959 any of the string options for the driver contains the given string as an
3960 expansion variable.
3961
3962 Arguments:
3963 d points to a driver instance block
3964 s the string to search for
3965
3966 Returns: TRUE if a dependency is found
3967 */
3968
3969 BOOL
3970 readconf_depends(driver_instance *d, uschar *s)
3971 {
3972 int count = *(d->info->options_count);
3973 optionlist *ol;
3974 uschar *ss;
3975
3976 for (ol = d->info->options; ol < d->info->options + count; ol++)
3977 {
3978 void *options_block;
3979 uschar *value;
3980 int type = ol->type & opt_mask;
3981 if (type != opt_stringptr) continue;
3982 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3983 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3984 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3985 {
3986 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3987 isalnum(ss[Ustrlen(s)])) continue;
3988 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3989 d->name, ol->name, s);
3990 return TRUE;
3991 }
3992 }
3993
3994 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3995 return FALSE;
3996 }
3997
3998
3999
4000
4001 /*************************************************
4002 * Decode an error type for retries *
4003 *************************************************/
4004
4005 /* This function is global because it is also called from the main
4006 program when testing retry information. It decodes strings such as "quota_7d"
4007 into numerical error codes.
4008
4009 Arguments:
4010 pp points to start of text
4011 p points past end of text
4012 basic_errno points to an int to receive the main error number
4013 more_errno points to an int to receive the secondary error data
4014
4015 Returns: NULL if decoded correctly; else points to error text
4016 */
4017
4018 uschar *
4019 readconf_retry_error(const uschar *pp, const uschar *p,
4020 int *basic_errno, int *more_errno)
4021 {
4022 int len;
4023 const uschar *q = pp;
4024 while (q < p && *q != '_') q++;
4025 len = q - pp;
4026
4027 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
4028 {
4029 *basic_errno = ERRNO_EXIMQUOTA;
4030 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
4031 return US"bad time value";
4032 }
4033
4034 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
4035 {
4036 *basic_errno = ECONNREFUSED;
4037 if (q != p)
4038 {
4039 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
4040 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
4041 else return US"A or MX expected after \"refused\"";
4042 }
4043 }
4044
4045 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
4046 {
4047 *basic_errno = ETIMEDOUT;
4048 if (q != p)
4049 {
4050 int i;
4051 int xlen = p - q - 1;
4052 const uschar *x = q + 1;
4053
4054 static uschar *extras[] =
4055 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
4056 static int values[] =
4057 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
4058
4059 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
4060 if (strncmpic(x, extras[i], xlen) == 0)
4061 {
4062 *more_errno = values[i];
4063 break;
4064 }
4065
4066 if (i >= sizeof(extras)/sizeof(uschar *))
4067 if (strncmpic(x, US"DNS", xlen) == 0)
4068 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
4069 "available in retry rules (it has never worked) - treated as "
4070 "\"timeout\"");
4071 else
4072 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
4073 }
4074 }
4075
4076 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
4077 strncmpic(pp, US"rcpt_4", 6) == 0 ||
4078 strncmpic(pp, US"data_4", 6) == 0)
4079 {
4080 BOOL bad = FALSE;
4081 int x = 255; /* means "any 4xx code" */
4082 if (p != pp + 8) bad = TRUE; else
4083 {
4084 int a = pp[6], b = pp[7];
4085 if (isdigit(a))
4086 {
4087 x = (a - '0') * 10;
4088 if (isdigit(b)) x += b - '0';
4089 else if (b == 'x') x += 100;
4090 else bad = TRUE;
4091 }
4092 else if (a != 'x' || b != 'x') bad = TRUE;
4093 }
4094
4095 if (bad)
4096 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4097 "x is literal and d is any digit", pp);
4098
4099 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4100 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4101 *more_errno = x << 8;
4102 }
4103
4104 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4105 strncmpic(q+1, US"failed", p-q-1) == 0)
4106 *basic_errno = ERRNO_AUTHFAIL;
4107
4108 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4109 *basic_errno = ERRNO_SMTPCLOSED;
4110
4111 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4112 *basic_errno = ERRNO_TLSREQUIRED;
4113
4114 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4115 *basic_errno = ERRNO_UNKNOWNHOST;
4116
4117 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4118 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4119
4120 return NULL;
4121 }
4122
4123
4124
4125
4126 /*************************************************
4127 * Read retry information *
4128 *************************************************/
4129
4130 /* Each line of retry information contains:
4131
4132 . A domain name pattern or an address pattern;
4133
4134 . An error name, possibly with additional data, or *;
4135
4136 . An optional sequence of retry items, each consisting of an identifying
4137 letter, a cutoff time, and optional parameters.
4138
4139 All this is decoded and placed into a control block. */
4140
4141
4142 /* Subroutine to read an argument, preceded by a comma and terminated
4143 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4144 1 = fixed point number (returned *1000).
4145
4146 Arguments:
4147 paddr pointer to pointer to current character; updated
4148 type 0 => read a time; 1 => read a fixed point number
4149
4150 Returns: time in seconds or fixed point number * 1000
4151 */
4152
4153 static int
4154 retry_arg(const uschar **paddr, int type)
4155 {
4156 const uschar *p = *paddr;
4157 const uschar *pp;
4158
4159 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4160
4161 while (isspace(*p)) p++;
4162 pp = p;
4163 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4164
4165 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4166 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4167
4168 *paddr = p;
4169 switch (type)
4170 {
4171 case 0: return readconf_readtime(pp, *p, FALSE);
4172 case 1: return readconf_readfixed(pp, *p);
4173 }
4174 return 0; /* Keep picky compilers happy */
4175 }
4176
4177 /* The function proper */
4178
4179 void
4180 readconf_retries(void)
4181 {
4182 retry_config **chain = &retries;
4183 retry_config *next;
4184 const uschar *p;
4185
4186 while ((p = get_config_line()))
4187 {
4188 retry_rule **rchain;
4189 const uschar *pp;
4190 uschar *error;
4191
4192 next = store_get(sizeof(retry_config));
4193 next->next = NULL;
4194 *chain = next;
4195 chain = &(next->next);
4196 next->basic_errno = next->more_errno = 0;
4197 next->senders = NULL;
4198 next->rules = NULL;
4199 rchain = &(next->rules);
4200
4201 next->pattern = string_dequote(&p);
4202 while (isspace(*p)) p++;
4203 pp = p;
4204 while (mac_isgraph(*p)) p++;
4205 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4206 "missing error type in retry rule");
4207
4208 /* Test error names for things we understand. */
4209
4210 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4211 &next->more_errno)))
4212 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4213
4214 /* There may be an optional address list of senders to be used as another
4215 constraint on the rule. This was added later, so the syntax is a bit of a
4216 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4217 an address list. */
4218
4219 while (isspace(*p)) p++;
4220 if (Ustrncmp(p, "senders", 7) == 0)
4221 {
4222 p += 7;
4223 while (isspace(*p)) p++;
4224 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4225 "\"=\" expected after \"senders\" in retry rule");
4226 while (isspace(*p)) p++;
4227 next->senders = string_dequote(&p);
4228 }
4229
4230 /* Now the retry rules. Keep the maximum timeout encountered. */
4231
4232 while (isspace(*p)) p++;
4233
4234 while (*p != 0)
4235 {
4236 retry_rule *rule = store_get(sizeof(retry_rule));
4237 *rchain = rule;
4238 rchain = &(rule->next);
4239 rule->next = NULL;
4240 rule->rule = toupper(*p++);
4241 rule->timeout = retry_arg(&p, 0);
4242 if (rule->timeout > retry_maximum_timeout)
4243 retry_maximum_timeout = rule->timeout;
4244
4245 switch (rule->rule)
4246 {
4247 case 'F': /* Fixed interval */
4248 rule->p1 = retry_arg(&p, 0);
4249 break;
4250
4251 case 'G': /* Geometrically increasing intervals */
4252 case 'H': /* Ditto, but with randomness */
4253 rule->p1 = retry_arg(&p, 0);
4254 rule->p2 = retry_arg(&p, 1);
4255 break;
4256
4257 default:
4258 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4259 break;
4260 }
4261
4262 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4263 (rule->rule != 'F' && rule->p2 < 1000))
4264 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4265 "bad parameters for retry rule");
4266
4267 while (isspace(*p)) p++;
4268 if (*p == ';')
4269 {
4270 p++;
4271 while (isspace(*p)) p++;
4272 }
4273 else if (*p != 0)
4274 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4275 }
4276 }
4277 }
4278
4279
4280
4281 /*************************************************
4282 * Initialize authenticators *
4283 *************************************************/
4284
4285 /* Read the authenticators section of the configuration file.
4286
4287 Arguments: none
4288 Returns: nothing
4289 */
4290
4291 static void
4292 auths_init(void)
4293 {
4294 auth_instance *au, *bu;
4295 readconf_driver_init(US"authenticator",
4296 (driver_instance **)(&auths), /* chain anchor */
4297 (driver_info *)auths_available, /* available drivers */
4298 sizeof(auth_info), /* size of info block */
4299 &auth_defaults, /* default values for generic options */
4300 sizeof(auth_instance), /* size of instance block */
4301 optionlist_auths, /* generic options */
4302 optionlist_auths_size);
4303
4304 for (au = auths; au; au = au->next)
4305 {
4306 if (!au->public_name)
4307 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4308 "the %s authenticator", au->name);
4309
4310 for (bu = au->next; bu; bu = bu->next)
4311 if (strcmpic(au->public_name, bu->public_name) == 0)
4312 if ((au->client && bu->client) || (au->server && bu->server))
4313 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4314 "(%s and %s) have the same public name (%s)",
4315 au->client ? US"client" : US"server", au->name, bu->name,
4316 au->public_name);
4317 }
4318 }
4319
4320
4321
4322
4323 /*************************************************
4324 * Read ACL information *
4325 *************************************************/
4326
4327 /* If this run of Exim is not doing something that involves receiving a
4328 message, we can just skip over the ACL information. No need to parse it.
4329
4330 First, we have a function for acl_read() to call back to get the next line. We
4331 need to remember the line we passed, because at the end it will contain the
4332 name of the next ACL. */
4333
4334 static uschar *acl_line;
4335
4336 static uschar *
4337 acl_callback(void)
4338 {
4339 acl_line = get_config_line();
4340 return acl_line;
4341 }
4342
4343
4344 /* Now the main function:
4345
4346 Arguments: none
4347 Returns: nothing
4348 */
4349
4350 static void
4351 readconf_acl(void)
4352 {
4353 uschar *p;
4354
4355 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4356 between ACLs. */
4357
4358 acl_line = get_config_line();
4359
4360 while(acl_line != NULL)
4361 {
4362 uschar name[64];
4363 tree_node *node;
4364 uschar *error;
4365
4366 p = readconf_readname(name, sizeof(name), acl_line);
4367 if (isupper(*name) && *p == '=')
4368 {
4369 read_macro_assignment(acl_line);
4370 acl_line = get_config_line();
4371 continue;
4372 }
4373
4374 if (*p != ':' || name[0] == 0)
4375 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4376
4377 node = store_get(sizeof(tree_node) + Ustrlen(name));
4378 Ustrcpy(node->name, name);
4379 if (!tree_insertnode(&acl_anchor, node))
4380 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4381 "there are two ACLs called \"%s\"", name);
4382
4383 node->data.ptr = acl_read(acl_callback, &error);
4384
4385 if (node->data.ptr == NULL && error != NULL)
4386 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4387 }
4388 }
4389
4390
4391
4392 /*************************************************
4393 * Read configuration for local_scan() *
4394 *************************************************/
4395
4396 /* This function is called after "begin local_scan" is encountered in the
4397 configuration file. If the local_scan() function allows for configuration
4398 options, we can process them. Otherwise, we expire in a panic.
4399
4400 Arguments: none
4401 Returns: nothing
4402 */
4403
4404 static void
4405 local_scan_init(void)
4406 {
4407 #ifndef LOCAL_SCAN_HAS_OPTIONS
4408 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4409 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4410 #else
4411
4412 uschar *p;
4413 while ((p = get_config_line()) != NULL)
4414 {
4415 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4416 NULL, US"local_scan option \"%s\" unknown");
4417 }
4418 #endif
4419 }
4420
4421
4422
4423 /*************************************************
4424 * Read rest of configuration (after main) *
4425 *************************************************/
4426
4427 /* This function reads the rest of the runtime configuration, after the main
4428 configuration. It is called only when actually needed. Each subsequent section
4429 of the configuration starts with a line of the form
4430
4431 begin name
4432
4433 where the name is "routers", "transports", etc. A section is terminated by
4434 hitting the next "begin" line, and the next name is left in next_section.
4435 Because it may confuse people as to whether the names are singular or plural,
4436 we add "s" if it's missing. There is always enough room in next_section for
4437 this. This function is basically just a switch.
4438
4439 Arguments: none
4440 Returns: nothing
4441 */
4442
4443 static uschar *section_list[] = {
4444 US"acls",
4445 US"authenticators",
4446 US"local_scans",
4447 US"retrys",
4448 US"rewrites",
4449 US"routers",
4450 US"transports"};
4451
4452 void
4453 readconf_rest(void)
4454 {
4455 int had = 0;
4456
4457 while(next_section[0] != 0)
4458 {
4459 int bit;
4460 int first = 0;
4461 int last = sizeof(section_list) / sizeof(uschar *);
4462 int mid = last/2;
4463 int n = Ustrlen(next_section);
4464
4465 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4466
4467 for (;;)
4468 {
4469 int c = strcmpic(next_section, section_list[mid]);
4470 if (c == 0) break;
4471 if (c > 0) first = mid + 1; else last = mid;
4472 if (first >= last)
4473 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4474 "\"%.*s\" is not a known configuration section name", n, next_section);
4475 mid = (last + first)/2;
4476 }
4477
4478 bit = 1 << mid;
4479 if (((had ^= bit) & bit) == 0)
4480 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4481 "\"%.*s\" section is repeated in the configuration file", n,
4482 next_section);
4483
4484 switch(mid)
4485 {
4486 case 0: readconf_acl(); break;
4487 case 1: auths_init(); break;
4488 case 2: local_scan_init(); break;
4489 case 3: readconf_retries(); break;
4490 case 4: readconf_rewrites(); break;
4491 case 5: route_init(); break;
4492 case 6: transport_init(); break;
4493 }
4494 }
4495
4496 (void)fclose(config_file);
4497 }
4498
4499 /* Init the storage for the pre-parsed config lines */
4500 void
4501 readconf_save_config(const uschar *s)
4502 {
4503 save_config_line(string_sprintf("# Exim Configuration (%s)",
4504 running_in_test_harness ? US"X" : s));
4505 }
4506
4507 static void
4508 save_config_position(const uschar *file, int line)
4509 {
4510 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4511 }
4512
4513 /* Append a pre-parsed logical line to the config lines store,
4514 this operates on a global (static) list that holds all the pre-parsed
4515 config lines, we do no further processing here, output formatting and
4516 honouring of <hide> or macros will be done during output */
4517 static void
4518 save_config_line(const uschar* line)
4519 {
4520 static config_line_item *current;
4521 config_line_item *next;
4522
4523 next = (config_line_item*) store_get(sizeof(config_line_item));
4524 next->line = string_copy(line);
4525 next->next = NULL;
4526
4527 if (!config_lines) config_lines = next;
4528 else current->next = next;
4529
4530 current = next;
4531 }
4532
4533 /* List the parsed config lines, care about nice formatting and
4534 hide the <hide> values unless we're the admin user */
4535 void
4536 print_config(BOOL admin, BOOL terse)
4537 {
4538 config_line_item *i;
4539 const int TS = terse ? 0 : 2;
4540 int indent = 0;
4541
4542 for (i = config_lines; i; i = i->next)
4543 {
4544 uschar *current;
4545 uschar *p;
4546
4547 /* skip over to the first non-space */
4548 for (current = i->line; *current && isspace(*current); ++current)
4549 ;
4550
4551 if (*current == '\0')
4552 continue;
4553
4554 /* Collapse runs of spaces. We stop this if we encounter one of the
4555 * following characters: "'$, as this may indicate careful formatting */
4556 for (p = current; *p; ++p)
4557 {
4558 uschar *next;
4559 if (!isspace(*p)) continue;
4560 if (*p != ' ') *p = ' ';
4561
4562 for (next = p; isspace(*next); ++next)
4563 ;
4564
4565 if (next - p > 1)
4566 memmove(p+1, next, Ustrlen(next)+1);
4567
4568 if (*next == '"' || *next == '\'' || *next == '$')
4569 break;
4570 }
4571
4572 /* # lines */
4573 if (current[0] == '#')
4574 puts(CCS current);
4575
4576 /* begin lines are left aligned */
4577 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4578 {
4579 if (!terse) puts("");
4580 puts(CCS current);
4581 indent = TS;
4582 }
4583
4584 /* router/acl/transport block names */
4585 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4586 {
4587 if (!terse) puts("");
4588 printf("%*s%s\n", TS, "", current);
4589 indent = 2 * TS;
4590 }
4591
4592 /* hidden lines (all MACROS or lines prefixed with "hide") */
4593 else if ( !admin
4594 && ( isupper(*current)
4595 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4596 )
4597 )
4598 {
4599 if ((p = Ustrchr(current, '=')))
4600 {
4601 *p = '\0';
4602 printf("%*s%s= %s\n", indent, "", current, hidden);
4603 }
4604 /* e.g.: hide split_spool_directory */
4605 else
4606 printf("%*s\n", indent, hidden);
4607 }
4608
4609 else
4610 /* rest is public */
4611 printf("%*s%s\n", indent, "", current);
4612 }
4613 }
4614
4615 /* vi: aw ai sw=2
4616 */
4617 /* End of readconf.c */
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