Suppress tls_advertise_hosts warning during 'make install'
[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 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
216 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
217 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
218 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
219 #ifdef EXPERIMENTAL_DCC
220 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
221 { "dccifd_address", opt_stringptr, &dccifd_address },
222 { "dccifd_options", opt_stringptr, &dccifd_options },
223 #endif
224 { "delay_warning", opt_timelist, &delay_warning },
225 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
226 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
227 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
228 { "delivery_date_remove", opt_bool, &delivery_date_remove },
229 #ifdef ENABLE_DISABLE_FSYNC
230 { "disable_fsync", opt_bool, &disable_fsync },
231 #endif
232 { "disable_ipv6", opt_bool, &disable_ipv6 },
233 #ifndef DISABLE_DKIM
234 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
235 #endif
236 #ifdef EXPERIMENTAL_DMARC
237 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
238 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
239 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
240 #endif
241 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
242 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
243 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
244 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
245 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
246 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
247 { "dns_retrans", opt_time, &dns_retrans },
248 { "dns_retry", opt_int, &dns_retry },
249 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
250 { "dns_use_edns0", opt_int, &dns_use_edns0 },
251 /* This option is now a no-op, retained for compability */
252 { "drop_cr", opt_bool, &drop_cr },
253 /*********************************************************/
254 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
255 { "dsn_from", opt_stringptr, &dsn_from },
256 { "envelope_to_remove", opt_bool, &envelope_to_remove },
257 { "errors_copy", opt_stringptr, &errors_copy },
258 { "errors_reply_to", opt_stringptr, &errors_reply_to },
259 #ifndef DISABLE_EVENT
260 { "event_action", opt_stringptr, &event_action },
261 #endif
262 { "exim_group", opt_gid, &exim_gid },
263 { "exim_path", opt_stringptr, &exim_path },
264 { "exim_user", opt_uid, &exim_uid },
265 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
266 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
267 { "finduser_retries", opt_int, &finduser_retries },
268 { "freeze_tell", opt_stringptr, &freeze_tell },
269 { "gecos_name", opt_stringptr, &gecos_name },
270 { "gecos_pattern", opt_stringptr, &gecos_pattern },
271 #ifdef SUPPORT_TLS
272 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
273 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
274 /* These three gnutls_require_* options stopped working in Exim 4.80 */
275 /* From 4.83 we log a warning; a future relase will remove them */
276 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
277 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
278 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
279 #endif
280 { "header_line_maxsize", opt_int, &header_line_maxsize },
281 { "header_maxsize", opt_int, &header_maxsize },
282 { "headers_charset", opt_stringptr, &headers_charset },
283 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
284 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
285 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
286 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
287 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
288 { "hold_domains", opt_stringptr, &hold_domains },
289 { "host_lookup", opt_stringptr, &host_lookup },
290 { "host_lookup_order", opt_stringptr, &host_lookup_order },
291 { "host_reject_connection", opt_stringptr, &host_reject_connection },
292 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
293 #ifdef SUPPORT_PROXY
294 { "hosts_proxy", opt_stringptr, &hosts_proxy },
295 #endif
296 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
297 #ifdef LOOKUP_IBASE
298 { "ibase_servers", opt_stringptr, &ibase_servers },
299 #endif
300 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
301 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
302 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
303 { "keep_environment", opt_stringptr, &keep_environment },
304 { "keep_malformed", opt_time, &keep_malformed },
305 #ifdef LOOKUP_LDAP
306 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
307 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
308 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
309 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
310 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
311 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
312 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
313 { "ldap_start_tls", opt_bool, &eldap_start_tls },
314 { "ldap_version", opt_int, &eldap_version },
315 #endif
316 { "local_from_check", opt_bool, &local_from_check },
317 { "local_from_prefix", opt_stringptr, &local_from_prefix },
318 { "local_from_suffix", opt_stringptr, &local_from_suffix },
319 { "local_interfaces", opt_stringptr, &local_interfaces },
320 { "local_scan_timeout", opt_time, &local_scan_timeout },
321 { "local_sender_retain", opt_bool, &local_sender_retain },
322 { "localhost_number", opt_stringptr, &host_number_string },
323 { "log_file_path", opt_stringptr, &log_file_path },
324 { "log_selector", opt_stringptr, &log_selector_string },
325 { "log_timezone", opt_bool, &log_timezone },
326 { "lookup_open_max", opt_int, &lookup_open_max },
327 { "max_username_length", opt_int, &max_username_length },
328 { "message_body_newlines", opt_bool, &message_body_newlines },
329 { "message_body_visible", opt_mkint, &message_body_visible },
330 { "message_id_header_domain", opt_stringptr, &message_id_domain },
331 { "message_id_header_text", opt_stringptr, &message_id_text },
332 { "message_logs", opt_bool, &message_logs },
333 { "message_size_limit", opt_stringptr, &message_size_limit },
334 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
335 { "move_frozen_messages", opt_bool, &move_frozen_messages },
336 #endif
337 { "mua_wrapper", opt_bool, &mua_wrapper },
338 #ifdef LOOKUP_MYSQL
339 { "mysql_servers", opt_stringptr, &mysql_servers },
340 #endif
341 { "never_users", opt_uidlist, &never_users },
342 #ifdef SUPPORT_TLS
343 { "openssl_options", opt_stringptr, &openssl_options },
344 #endif
345 #ifdef LOOKUP_ORACLE
346 { "oracle_servers", opt_stringptr, &oracle_servers },
347 #endif
348 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
349 #ifdef EXIM_PERL
350 { "perl_at_start", opt_bool, &opt_perl_at_start },
351 { "perl_startup", opt_stringptr, &opt_perl_startup },
352 #endif
353 #ifdef LOOKUP_PGSQL
354 { "pgsql_servers", opt_stringptr, &pgsql_servers },
355 #endif
356 { "pid_file_path", opt_stringptr, &pid_file_path },
357 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
358 #ifndef DISABLE_PRDR
359 { "prdr_enable", opt_bool, &prdr_enable },
360 #endif
361 { "preserve_message_logs", opt_bool, &preserve_message_logs },
362 { "primary_hostname", opt_stringptr, &primary_hostname },
363 { "print_topbitchars", opt_bool, &print_topbitchars },
364 { "process_log_path", opt_stringptr, &process_log_path },
365 { "prod_requires_admin", opt_bool, &prod_requires_admin },
366 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
367 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
368 { "queue_domains", opt_stringptr, &queue_domains },
369 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
370 { "queue_only", opt_bool, &queue_only },
371 { "queue_only_file", opt_stringptr, &queue_only_file },
372 { "queue_only_load", opt_fixed, &queue_only_load },
373 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
374 { "queue_only_override", opt_bool, &queue_only_override },
375 { "queue_run_in_order", opt_bool, &queue_run_in_order },
376 { "queue_run_max", opt_int, &queue_run_max },
377 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
378 { "receive_timeout", opt_time, &receive_timeout },
379 { "received_header_text", opt_stringptr, &received_header_text },
380 { "received_headers_max", opt_int, &received_headers_max },
381 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
382 { "recipients_max", opt_int, &recipients_max },
383 { "recipients_max_reject", opt_bool, &recipients_max_reject },
384 #ifdef LOOKUP_REDIS
385 { "redis_servers", opt_stringptr, &redis_servers },
386 #endif
387 { "remote_max_parallel", opt_int, &remote_max_parallel },
388 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
389 { "retry_data_expire", opt_time, &retry_data_expire },
390 { "retry_interval_max", opt_time, &retry_interval_max },
391 { "return_path_remove", opt_bool, &return_path_remove },
392 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
393 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
394 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
395 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
396 { "slow_lookup_log", opt_int, &slow_lookup_log },
397 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
398 { "smtp_accept_max", opt_int, &smtp_accept_max },
399 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
400 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
401 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
402 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
403 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
404 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
405 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
406 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
407 { "smtp_banner", opt_stringptr, &smtp_banner },
408 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
409 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
410 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
411 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
412 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
413 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
414 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
415 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
416 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
417 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
418 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
419 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
420 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
421 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
422 #ifdef SUPPORT_I18N
423 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
424 #endif
425 #ifdef WITH_CONTENT_SCAN
426 { "spamd_address", opt_stringptr, &spamd_address },
427 #endif
428 #ifdef EXPERIMENTAL_SPF
429 { "spf_guess", opt_stringptr, &spf_guess },
430 #endif
431 { "split_spool_directory", opt_bool, &split_spool_directory },
432 { "spool_directory", opt_stringptr, &spool_directory },
433 #ifdef LOOKUP_SQLITE
434 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
435 #endif
436 #ifdef EXPERIMENTAL_SRS
437 { "srs_config", opt_stringptr, &srs_config },
438 { "srs_hashlength", opt_int, &srs_hashlength },
439 { "srs_hashmin", opt_int, &srs_hashmin },
440 { "srs_maxage", opt_int, &srs_maxage },
441 { "srs_secrets", opt_stringptr, &srs_secrets },
442 { "srs_usehash", opt_bool, &srs_usehash },
443 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
444 #endif
445 { "strict_acl_vars", opt_bool, &strict_acl_vars },
446 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
447 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
448 { "syslog_duplication", opt_bool, &syslog_duplication },
449 { "syslog_facility", opt_stringptr, &syslog_facility_str },
450 { "syslog_processname", opt_stringptr, &syslog_processname },
451 { "syslog_timestamp", opt_bool, &syslog_timestamp },
452 { "system_filter", opt_stringptr, &system_filter },
453 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
454 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
455 { "system_filter_group", opt_gid, &system_filter_gid },
456 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
457 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
458 { "system_filter_user", opt_uid, &system_filter_uid },
459 { "tcp_nodelay", opt_bool, &tcp_nodelay },
460 #ifdef USE_TCP_WRAPPERS
461 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
462 #endif
463 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
464 { "timezone", opt_stringptr, &timezone_string },
465 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
466 #ifdef SUPPORT_TLS
467 { "tls_certificate", opt_stringptr, &tls_certificate },
468 { "tls_crl", opt_stringptr, &tls_crl },
469 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
470 { "tls_dhparam", opt_stringptr, &tls_dhparam },
471 { "tls_eccurve", opt_stringptr, &tls_eccurve },
472 # ifndef DISABLE_OCSP
473 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
474 # endif
475 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
476 { "tls_privatekey", opt_stringptr, &tls_privatekey },
477 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
478 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
479 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
480 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
481 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
482 #endif
483 { "trusted_groups", opt_gidlist, &trusted_groups },
484 { "trusted_users", opt_uidlist, &trusted_users },
485 { "unknown_login", opt_stringptr, &unknown_login },
486 { "unknown_username", opt_stringptr, &unknown_username },
487 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
488 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
489 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
490 { "warn_message_file", opt_stringptr, &warn_message_file },
491 { "write_rejectlog", opt_bool, &write_rejectlog }
492 };
493
494 static int optionlist_config_size =
495 sizeof(optionlist_config)/sizeof(optionlist);
496
497
498
499 /*************************************************
500 * Find the name of an option *
501 *************************************************/
502
503 /* This function is to aid debugging. Various functions take arguments that are
504 pointer variables in the options table or in option tables for various drivers.
505 For debugging output, it is useful to be able to find the name of the option
506 which is currently being processed. This function finds it, if it exists, by
507 searching the table(s).
508
509 Arguments: a value that is presumed to be in the table above
510 Returns: the option name, or an empty string
511 */
512
513 uschar *
514 readconf_find_option(void *p)
515 {
516 int i;
517 router_instance *r;
518 transport_instance *t;
519
520 for (i = 0; i < optionlist_config_size; i++)
521 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
522
523 for (r = routers; r != NULL; r = r->next)
524 {
525 router_info *ri = r->info;
526 for (i = 0; i < *ri->options_count; i++)
527 {
528 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
529 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
530 return US ri->options[i].name;
531 }
532 }
533
534 for (t = transports; t != NULL; t = t->next)
535 {
536 transport_info *ti = t->info;
537 for (i = 0; i < *ti->options_count; i++)
538 {
539 optionlist * op = &ti->options[i];
540 if ((op->type & opt_mask) != opt_stringptr) continue;
541 if (p == ( op->type & opt_public
542 ? (char *)t
543 : (char *)t->options_block
544 )
545 + (long int)op->value)
546 return US op->name;
547 }
548 }
549
550 return US"";
551 }
552
553
554
555
556 /*************************************************
557 * Deal with an assignment to a macro *
558 *************************************************/
559
560 /* This function is called when a line that starts with an upper case letter is
561 encountered. The argument "line" should contain a complete logical line, and
562 start with the first letter of the macro name. The macro name and the
563 replacement text are extracted and stored. Redefinition of existing,
564 non-command line, macros is permitted using '==' instead of '='.
565
566 Arguments:
567 s points to the start of the logical line
568
569 Returns: nothing
570 */
571
572 static void
573 read_macro_assignment(uschar *s)
574 {
575 uschar name[64];
576 int namelen = 0;
577 BOOL redef = FALSE;
578 macro_item *m;
579 macro_item *mlast = NULL;
580
581 while (isalnum(*s) || *s == '_')
582 {
583 if (namelen >= sizeof(name) - 1)
584 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
585 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
586 name[namelen++] = *s++;
587 }
588 name[namelen] = 0;
589
590 while (isspace(*s)) s++;
591 if (*s++ != '=')
592 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
593
594 if (*s == '=')
595 {
596 redef = TRUE;
597 s++;
598 }
599 while (isspace(*s)) s++;
600
601 /* If an existing macro of the same name was defined on the command line, we
602 just skip this definition. It's an error to attempt to redefine a macro without
603 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
604 It is also an error to define a macro whose name begins with the name of a
605 previously defined macro. Note: it is documented that the other way round
606 works. */
607
608 for (m = macros; m != NULL; m = m->next)
609 {
610 int len = Ustrlen(m->name);
611
612 if (Ustrcmp(m->name, name) == 0)
613 {
614 if (!m->command_line && !redef)
615 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
616 "defined (use \"==\" if you want to redefine it", name);
617 break;
618 }
619
620 if (len < namelen && Ustrstr(name, m->name) != NULL)
621 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
622 "a macro because previously defined macro \"%s\" is a substring",
623 name, m->name);
624
625 /* We cannot have this test, because it is documented that a substring
626 macro is permitted (there is even an example).
627 *
628 * if (len > namelen && Ustrstr(m->name, name) != NULL)
629 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
630 * "a macro because it is a substring of previously defined macro \"%s\"",
631 * name, m->name);
632 */
633
634 mlast = m;
635 }
636
637 /* Check for an overriding command-line definition. */
638
639 if (m != NULL && m->command_line) return;
640
641 /* Redefinition must refer to an existing macro. */
642
643 if (redef)
644 {
645 if (m == NULL)
646 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
647 "\"%s\"", name);
648 }
649
650 /* We have a new definition. The macro_item structure includes a final vector
651 called "name" which is one byte long. Thus, adding "namelen" gives us enough
652 room to store the "name" string. */
653
654 else
655 {
656 m = store_get(sizeof(macro_item) + namelen);
657 if (macros == NULL) macros = m; else mlast->next = m;
658 Ustrncpy(m->name, name, namelen);
659 m->name[namelen] = 0;
660 m->next = NULL;
661 m->command_line = FALSE;
662 }
663
664 /* Set the value of the new or redefined macro */
665
666 m->replacement = string_copy(s);
667 }
668
669
670
671
672
673 /*************************************************
674 * Read configuration line *
675 *************************************************/
676
677 /* A logical line of text is read from the configuration file into the big
678 buffer, taking account of macros, .includes, and continuations. The size of
679 big_buffer is increased if necessary. The count of configuration lines is
680 maintained. Physical input lines starting with # (ignoring leading white space,
681 and after macro replacement) and empty logical lines are always ignored.
682 Leading and trailing spaces are removed.
683
684 If we hit a line of the form "begin xxxx", the xxxx is placed in the
685 next_section vector, and the function returns NULL, indicating the end of a
686 configuration section. On end-of-file, NULL is returned with next_section
687 empty.
688
689 Arguments: none
690
691 Returns: a pointer to the first non-blank in the line,
692 or NULL if eof or end of section is reached
693 */
694
695 static uschar *
696 get_config_line(void)
697 {
698 int startoffset = 0; /* To first non-blank char in logical line */
699 int len = 0; /* Of logical line so far */
700 int newlen;
701 uschar *s, *ss;
702 macro_item *m;
703 BOOL macro_found;
704
705 /* Loop for handling continuation lines, skipping comments, and dealing with
706 .include files. */
707
708 for (;;)
709 {
710 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
711 {
712 if (config_file_stack != NULL) /* EOF inside .include */
713 {
714 (void)fclose(config_file);
715 config_file = config_file_stack->file;
716 config_filename = config_file_stack->filename;
717 config_lineno = config_file_stack->lineno;
718 config_file_stack = config_file_stack->next;
719 if (config_lines)
720 save_config_position(config_filename, config_lineno);
721 continue;
722 }
723
724 /* EOF at top level */
725
726 if (cstate_stack_ptr >= 0)
727 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
728 "Unexpected end of configuration file: .endif missing");
729
730 if (len != 0) break; /* EOF after continuation */
731 next_section[0] = 0; /* EOF at start of logical line */
732 return NULL;
733 }
734
735 config_lineno++;
736 newlen = len + Ustrlen(big_buffer + len);
737
738 if (config_lines && config_lineno == 1)
739 save_config_position(config_filename, config_lineno);
740
741 /* Handle pathologically long physical lines - yes, it did happen - by
742 extending big_buffer at this point. The code also copes with very long
743 logical lines. */
744
745 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
746 {
747 uschar *newbuffer;
748 big_buffer_size += BIG_BUFFER_SIZE;
749 newbuffer = store_malloc(big_buffer_size);
750
751 /* This use of strcpy is OK because we know that the string in the old
752 buffer is shorter than the new buffer. */
753
754 Ustrcpy(newbuffer, big_buffer);
755 store_free(big_buffer);
756 big_buffer = newbuffer;
757 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
758 break;
759 newlen += Ustrlen(big_buffer + newlen);
760 }
761
762 /* Find the true start of the physical line - leading spaces are always
763 ignored. */
764
765 ss = big_buffer + len;
766 while (isspace(*ss)) ss++;
767
768 /* Process the physical line for macros. If this is the start of the logical
769 line, skip over initial text at the start of the line if it starts with an
770 upper case character followed by a sequence of name characters and an equals
771 sign, because that is the definition of a new macro, and we don't do
772 replacement therein. */
773
774 s = ss;
775 if (len == 0 && isupper(*s))
776 {
777 while (isalnum(*s) || *s == '_') s++;
778 while (isspace(*s)) s++;
779 if (*s != '=') s = ss; /* Not a macro definition */
780 }
781
782 /* For each defined macro, scan the line (from after XXX= if present),
783 replacing all occurrences of the macro. */
784
785 macro_found = FALSE;
786 for (m = macros; m != NULL; m = m->next)
787 {
788 uschar *p, *pp;
789 uschar *t = s;
790
791 while ((p = Ustrstr(t, m->name)) != NULL)
792 {
793 int moveby;
794 int namelen = Ustrlen(m->name);
795 int replen = Ustrlen(m->replacement);
796
797 /* Expand the buffer if necessary */
798
799 while (newlen - namelen + replen + 1 > big_buffer_size)
800 {
801 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
802 uschar *newbuffer = store_malloc(newsize);
803 memcpy(newbuffer, big_buffer, newlen + 1);
804 p = newbuffer + (p - big_buffer);
805 s = newbuffer + (s - big_buffer);
806 ss = newbuffer + (ss - big_buffer);
807 t = newbuffer + (t - big_buffer);
808 big_buffer_size = newsize;
809 store_free(big_buffer);
810 big_buffer = newbuffer;
811 }
812
813 /* Shuffle the remaining characters up or down in the buffer before
814 copying in the replacement text. Don't rescan the replacement for this
815 same macro. */
816
817 pp = p + namelen;
818 moveby = replen - namelen;
819 if (moveby != 0)
820 {
821 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
822 newlen += moveby;
823 }
824 Ustrncpy(p, m->replacement, replen);
825 t = p + replen;
826 macro_found = TRUE;
827 }
828 }
829
830 /* An empty macro replacement at the start of a line could mean that ss no
831 longer points to the first non-blank character. */
832
833 while (isspace(*ss)) ss++;
834
835 /* Check for comment lines - these are physical lines. */
836
837 if (*ss == '#') continue;
838
839 /* Handle conditionals, which are also applied to physical lines. Conditions
840 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
841 expansion occured on the rest of the line. A preliminary test for the leading
842 '.' saves effort on most lines. */
843
844 if (*ss == '.')
845 {
846 int i;
847
848 /* Search the list of conditional directives */
849
850 for (i = 0; i < cond_list_size; i++)
851 {
852 int n;
853 cond_item *c = cond_list+i;
854 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
855
856 /* The following character must be white space or end of string */
857
858 n = ss[1 + c->namelen];
859 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
860
861 /* .ifdef and .ifndef push the current state onto the stack, then set
862 a new one from the table. Stack overflow is an error */
863
864 if (c->pushpop > 0)
865 {
866 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
867 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
868 ".%s nested too deeply", c->name);
869 cstate_stack[++cstate_stack_ptr] = cstate;
870 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
871 }
872
873 /* For any of the others, stack underflow is an error. The next state
874 comes either from the stack (.endif) or from the table. */
875
876 else
877 {
878 if (cstate_stack_ptr < 0)
879 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
880 ".%s without matching .ifdef", c->name);
881 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
882 next_cstate[cstate][macro_found? c->action1 : c->action2];
883 }
884
885 /* Having dealt with a directive, break the loop */
886
887 break;
888 }
889
890 /* If we have handled a conditional directive, continue with the next
891 physical line. Otherwise, fall through. */
892
893 if (i < cond_list_size) continue;
894 }
895
896 /* If the conditional state is not 0 (actively using these lines), ignore
897 this input line. */
898
899 if (cstate != 0) continue; /* Conditional skip */
900
901 /* Handle .include lines - these are also physical lines. */
902
903 if (Ustrncmp(ss, ".include", 8) == 0 &&
904 (isspace(ss[8]) ||
905 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
906 {
907 uschar *t;
908 int include_if_exists = isspace(ss[8])? 0 : 10;
909 config_file_item *save;
910 struct stat statbuf;
911
912 ss += 9 + include_if_exists;
913 while (isspace(*ss)) ss++;
914 t = ss + Ustrlen(ss);
915 while (t > ss && isspace(t[-1])) t--;
916 if (*ss == '\"' && t[-1] == '\"')
917 {
918 ss++;
919 t--;
920 }
921 *t = 0;
922
923 if (*ss != '/')
924 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
925 "absolute path \"%s\"", ss);
926
927 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
928
929 if (config_lines)
930 save_config_position(config_filename, config_lineno);
931 save = store_get(sizeof(config_file_item));
932 save->next = config_file_stack;
933 config_file_stack = save;
934 save->file = config_file;
935 save->filename = config_filename;
936 save->lineno = config_lineno;
937
938 config_file = Ufopen(ss, "rb");
939 if (config_file == NULL)
940 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
941 "configuration file %s", ss);
942 config_filename = string_copy(ss);
943 config_lineno = 0;
944 continue;
945 }
946
947 /* If this is the start of the logical line, remember where the non-blank
948 data starts. Otherwise shuffle down continuation lines to remove leading
949 white space. */
950
951 if (len == 0)
952 startoffset = ss - big_buffer;
953 else
954 {
955 s = big_buffer + len;
956 if (ss > s)
957 {
958 memmove(s, ss, (newlen - len) - (ss - s) + 1);
959 newlen -= ss - s;
960 }
961 }
962
963 /* Accept the new addition to the line. Remove trailing white space. */
964
965 len = newlen;
966 while (len > 0 && isspace(big_buffer[len-1])) len--;
967 big_buffer[len] = 0;
968
969 /* We are done if the line does not end in backslash and contains some data.
970 Empty logical lines are ignored. For continuations, remove the backslash and
971 go round the loop to read the continuation line. */
972
973 if (len > 0)
974 {
975 if (big_buffer[len-1] != '\\') break; /* End of logical line */
976 big_buffer[--len] = 0; /* Remove backslash */
977 }
978 } /* Loop for reading multiple physical lines */
979
980 /* We now have a logical line. Test for the end of a configuration section (or,
981 more accurately, for the start of the next section). Place the name of the next
982 section in next_section, and return NULL. If the name given is longer than
983 next_section, truncate it. It will be unrecognized later, because all the known
984 section names do fit. Leave space for pluralizing. */
985
986 s = big_buffer + startoffset; /* First non-space character */
987
988 if (config_lines)
989 save_config_line(s);
990
991 if (strncmpic(s, US"begin ", 6) == 0)
992 {
993 s += 6;
994 while (isspace(*s)) s++;
995 if (big_buffer + len - s > sizeof(next_section) - 2)
996 s[sizeof(next_section) - 2] = 0;
997 Ustrcpy(next_section, s);
998 return NULL;
999 }
1000
1001 /* Return the first non-blank character. */
1002
1003 return s;
1004 }
1005
1006
1007
1008 /*************************************************
1009 * Read a name *
1010 *************************************************/
1011
1012 /* The yield is the pointer to the next uschar. Names longer than the
1013 output space are silently truncated. This function is also used from acl.c when
1014 parsing ACLs.
1015
1016 Arguments:
1017 name where to put the name
1018 len length of name
1019 s input pointer
1020
1021 Returns: new input pointer
1022 */
1023
1024 uschar *
1025 readconf_readname(uschar *name, int len, uschar *s)
1026 {
1027 int p = 0;
1028 while (isspace(*s)) s++;
1029 if (isalpha(*s))
1030 {
1031 while (isalnum(*s) || *s == '_')
1032 {
1033 if (p < len-1) name[p++] = *s;
1034 s++;
1035 }
1036 }
1037 name[p] = 0;
1038 while (isspace(*s)) s++;
1039 return s;
1040 }
1041
1042
1043
1044
1045 /*************************************************
1046 * Read a time value *
1047 *************************************************/
1048
1049 /* This function is also called from outside, to read argument
1050 time values. The format of a time value is:
1051
1052 [<n>w][<n>d][<n>h][<n>m][<n>s]
1053
1054 as long as at least one is present. If a format error is encountered,
1055 return a negative value. The value must be terminated by the given
1056 terminator.
1057
1058 Arguments:
1059 s input pointer
1060 terminator required terminating character
1061 return_msec if TRUE, allow fractional seconds and return milliseconds
1062
1063 Returns: the time value, or -1 on syntax error
1064 value is seconds if return_msec is FALSE
1065 value is milliseconds if return_msec is TRUE
1066 */
1067
1068 int
1069 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1070 {
1071 int yield = 0;
1072 for (;;)
1073 {
1074 int value, count;
1075 double fraction;
1076
1077 if (!isdigit(*s)) return -1;
1078 (void)sscanf(CCS s, "%d%n", &value, &count);
1079 s += count;
1080
1081 switch (*s)
1082 {
1083 case 'w': value *= 7;
1084 case 'd': value *= 24;
1085 case 'h': value *= 60;
1086 case 'm': value *= 60;
1087 case 's': s++;
1088 break;
1089
1090 case '.':
1091 if (!return_msec) return -1;
1092 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1093 s += count;
1094 if (*s++ != 's') return -1;
1095 yield += (int)(fraction * 1000.0);
1096 break;
1097
1098 default: return -1;
1099 }
1100
1101 if (return_msec) value *= 1000;
1102 yield += value;
1103 if (*s == terminator) return yield;
1104 }
1105 /* Control never reaches here. */
1106 }
1107
1108
1109
1110 /*************************************************
1111 * Read a fixed point value *
1112 *************************************************/
1113
1114 /* The value is returned *1000
1115
1116 Arguments:
1117 s input pointer
1118 terminator required terminator
1119
1120 Returns: the value, or -1 on error
1121 */
1122
1123 static int
1124 readconf_readfixed(const uschar *s, int terminator)
1125 {
1126 int yield = 0;
1127 int value, count;
1128 if (!isdigit(*s)) return -1;
1129 (void)sscanf(CS s, "%d%n", &value, &count);
1130 s += count;
1131 yield = value * 1000;
1132 if (*s == '.')
1133 {
1134 int m = 100;
1135 while (isdigit((*(++s))))
1136 {
1137 yield += (*s - '0') * m;
1138 m /= 10;
1139 }
1140 }
1141
1142 return (*s == terminator)? yield : (-1);
1143 }
1144
1145
1146
1147 /*************************************************
1148 * Find option in list *
1149 *************************************************/
1150
1151 /* The lists are always in order, so binary chop can be used.
1152
1153 Arguments:
1154 name the option name to search for
1155 ol the first entry in the option list
1156 last one more than the offset of the last entry in the option list
1157
1158 Returns: pointer to an option entry, or NULL if not found
1159 */
1160
1161 static optionlist *
1162 find_option(uschar *name, optionlist *ol, int last)
1163 {
1164 int first = 0;
1165 while (last > first)
1166 {
1167 int middle = (first + last)/2;
1168 int c = Ustrcmp(name, ol[middle].name);
1169 if (c == 0) return ol + middle;
1170 else if (c > 0) first = middle + 1;
1171 else last = middle;
1172 }
1173 return NULL;
1174 }
1175
1176
1177
1178 /*************************************************
1179 * Find a set flag in option list *
1180 *************************************************/
1181
1182 /* Because some versions of Unix make no restrictions on the values of uids and
1183 gids (even negative ones), we cannot represent "unset" by a special value.
1184 There is therefore a separate boolean variable for each one indicating whether
1185 a value is set or not. This function returns a pointer to the boolean, given
1186 the original option name. It is a major disaster if the flag cannot be found.
1187
1188 Arguments:
1189 name the name of the uid or gid option
1190 oltop points to the start of the relevant option list
1191 last one more than the offset of the last item in the option list
1192 data_block NULL when reading main options => data values in the option
1193 list are absolute addresses; otherwise they are byte offsets
1194 in data_block (used for driver options)
1195
1196 Returns: a pointer to the boolean flag.
1197 */
1198
1199 static BOOL *
1200 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1201 {
1202 optionlist *ol;
1203 uschar name2[64];
1204 sprintf(CS name2, "*set_%.50s", name);
1205 ol = find_option(name2, oltop, last);
1206 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1207 "Exim internal error: missing set flag for %s", name);
1208 return (data_block == NULL)? (BOOL *)(ol->value) :
1209 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1210 }
1211
1212
1213
1214
1215 /*************************************************
1216 * Output extra characters message and die *
1217 *************************************************/
1218
1219 /* Called when an option line has junk on the end. Sometimes this is because
1220 the sysadmin thinks comments are permitted.
1221
1222 Arguments:
1223 s points to the extra characters
1224 t1..t3 strings to insert in the log message
1225
1226 Returns: doesn't return; dies
1227 */
1228
1229 static void
1230 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1231 {
1232 uschar *comment = US"";
1233 if (*s == '#') comment = US" (# is comment only at line start)";
1234 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1235 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1236 }
1237
1238
1239
1240 /*************************************************
1241 * Read rewrite information *
1242 *************************************************/
1243
1244 /* Each line of rewrite information contains:
1245
1246 . A complete address in the form user@domain, possibly with
1247 leading * for each part; or alternatively, a regex.
1248
1249 . A replacement string (which will be expanded).
1250
1251 . An optional sequence of one-letter flags, indicating which
1252 headers etc. to apply this rule to.
1253
1254 All this is decoded and placed into a control block. The OR of the flags is
1255 maintained in a common word.
1256
1257 Arguments:
1258 p points to the string that makes up the rule
1259 existflags points to the overall flag word
1260 isglobal TRUE if reading global rewrite rules
1261
1262 Returns: the control block for the parsed rule.
1263 */
1264
1265 static rewrite_rule *
1266 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1267 {
1268 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1269
1270 next->next = NULL;
1271 next->key = string_dequote(&p);
1272
1273 while (isspace(*p)) p++;
1274 if (*p == 0)
1275 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1276 "missing rewrite replacement string");
1277
1278 next->flags = 0;
1279 next->replacement = string_dequote(&p);
1280
1281 while (*p != 0) switch (*p++)
1282 {
1283 case ' ': case '\t': break;
1284
1285 case 'q': next->flags |= rewrite_quit; break;
1286 case 'w': next->flags |= rewrite_whole; break;
1287
1288 case 'h': next->flags |= rewrite_all_headers; break;
1289 case 's': next->flags |= rewrite_sender; break;
1290 case 'f': next->flags |= rewrite_from; break;
1291 case 't': next->flags |= rewrite_to; break;
1292 case 'c': next->flags |= rewrite_cc; break;
1293 case 'b': next->flags |= rewrite_bcc; break;
1294 case 'r': next->flags |= rewrite_replyto; break;
1295
1296 case 'E': next->flags |= rewrite_all_envelope; break;
1297 case 'F': next->flags |= rewrite_envfrom; break;
1298 case 'T': next->flags |= rewrite_envto; break;
1299
1300 case 'Q': next->flags |= rewrite_qualify; break;
1301 case 'R': next->flags |= rewrite_repeat; break;
1302
1303 case 'S':
1304 next->flags |= rewrite_smtp;
1305 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1306 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1307 "rewrite rule has the S flag but is not a regular expression");
1308 break;
1309
1310 default:
1311 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1312 "unknown rewrite flag character '%c' "
1313 "(could be missing quotes round replacement item)", p[-1]);
1314 break;
1315 }
1316
1317 /* If no action flags are set, set all the "normal" rewrites. */
1318
1319 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1320 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1321
1322 /* Remember which exist, for optimization, and return the rule */
1323
1324 *existflags |= next->flags;
1325 return next;
1326 }
1327
1328
1329
1330
1331 /*************************************************
1332 * Read global rewrite information *
1333 *************************************************/
1334
1335 /* Each line is a single rewrite rule; it is parsed into a control block
1336 by readconf_one_rewrite(), and its flags are ORed into the global flag
1337 word rewrite_existflags. */
1338
1339 void
1340 readconf_rewrites(void)
1341 {
1342 rewrite_rule **chain = &global_rewrite_rules;
1343 uschar *p;
1344
1345 while ((p = get_config_line()) != NULL)
1346 {
1347 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1348 *chain = next;
1349 chain = &(next->next);
1350 }
1351 }
1352
1353
1354
1355 /*************************************************
1356 * Read a string *
1357 *************************************************/
1358
1359 /* Strings are read into the normal store pool. As long we aren't too
1360 near the end of the current block, the string will just use what is necessary
1361 on the top of the stacking pool, because string_cat() uses the extension
1362 mechanism.
1363
1364 Argument:
1365 s the rest of the input line
1366 name the option name (for errors)
1367
1368 Returns: pointer to the string
1369 */
1370
1371 static uschar *
1372 read_string(const uschar *s, const uschar *name)
1373 {
1374 uschar *yield;
1375 const uschar *ss;
1376
1377 if (*s != '\"') return string_copy(s);
1378
1379 ss = s;
1380 yield = string_dequote(&s);
1381
1382 if (s == ss+1 || s[-1] != '\"')
1383 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1384 "missing quote at end of string value for %s", name);
1385
1386 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1387
1388 return yield;
1389 }
1390
1391
1392 /*************************************************
1393 * Custom-handler options *
1394 *************************************************/
1395 static void
1396 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1397 {
1398 if (*str == '$')
1399 smtp_receive_timeout_s = string_copy(str);
1400 else
1401 {
1402 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1403 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1404 if (smtp_receive_timeout < 0)
1405 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1406 name);
1407 }
1408 }
1409
1410 /*************************************************
1411 * Handle option line *
1412 *************************************************/
1413
1414 /* This function is called from several places to process a line containing the
1415 setting of an option. The first argument is the line to be decoded; it has been
1416 checked not to be empty and not to start with '#'. Trailing newlines and white
1417 space have been removed. The second argument is a pointer to the list of
1418 variable names that are to be recognized, together with their types and
1419 locations, and the third argument gives the number of entries in the list.
1420
1421 The fourth argument is a pointer to a data block. If it is NULL, then the data
1422 values in the options list are absolute addresses. Otherwise, they are byte
1423 offsets in the data block.
1424
1425 String option data may continue onto several lines; this function reads further
1426 data from config_file if necessary.
1427
1428 The yield of this function is normally zero. If a string continues onto
1429 multiple lines, then the data value is permitted to be followed by a comma
1430 or a semicolon (for use in drivers) and the yield is that character.
1431
1432 Arguments:
1433 buffer contains the configuration line to be handled
1434 oltop points to the start of the relevant option list
1435 last one more than the offset of the last item in the option list
1436 data_block NULL when reading main options => data values in the option
1437 list are absolute addresses; otherwise they are byte offsets
1438 in data_block when they have opt_public set; otherwise
1439 they are byte offsets in data_block->options_block.
1440 unknown_txt format string to use in panic message for unknown option;
1441 must contain %s for option name
1442 if given as NULL, don't panic on unknown option
1443
1444 Returns: TRUE if an option was read successfully,
1445 FALSE false for an unknown option if unknown_txt == NULL,
1446 otherwise panic and die on an unknown option
1447 */
1448
1449 static BOOL
1450 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1451 void *data_block, uschar *unknown_txt)
1452 {
1453 int ptr = 0;
1454 int offset = 0;
1455 int n, count, type, value;
1456 int issecure = 0;
1457 uid_t uid;
1458 gid_t gid;
1459 BOOL boolvalue = TRUE;
1460 BOOL freesptr = TRUE;
1461 optionlist *ol, *ol2;
1462 struct passwd *pw;
1463 void *reset_point;
1464 int intbase = 0;
1465 uschar *inttype = US"";
1466 uschar *sptr;
1467 uschar *s = buffer;
1468 uschar *saved_condition, *strtemp;
1469 uschar **str_target;
1470 uschar name[64];
1471 uschar name2[64];
1472
1473 /* There may be leading spaces; thereafter, we expect an option name starting
1474 with a letter. */
1475
1476 while (isspace(*s)) s++;
1477 if (!isalpha(*s))
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1479
1480 /* Read the name of the option, and skip any subsequent white space. If
1481 it turns out that what we read was "hide", set the flag indicating that
1482 this is a secure option, and loop to read the next word. */
1483
1484 for (n = 0; n < 2; n++)
1485 {
1486 while (isalnum(*s) || *s == '_')
1487 {
1488 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1489 s++;
1490 }
1491 name[ptr] = 0;
1492 while (isspace(*s)) s++;
1493 if (Ustrcmp(name, "hide") != 0) break;
1494 issecure = opt_secure;
1495 ptr = 0;
1496 }
1497
1498 /* Deal with "no_" or "not_" here for booleans */
1499
1500 if (Ustrncmp(name, "no_", 3) == 0)
1501 {
1502 boolvalue = FALSE;
1503 offset = 3;
1504 }
1505
1506 if (Ustrncmp(name, "not_", 4) == 0)
1507 {
1508 boolvalue = FALSE;
1509 offset = 4;
1510 }
1511
1512 /* Search the list for the given name. A non-existent name, or an option that
1513 is set twice, is a disaster. */
1514
1515 ol = find_option(name + offset, oltop, last);
1516
1517 if (ol == NULL)
1518 {
1519 if (unknown_txt == NULL) return FALSE;
1520 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1521 }
1522
1523 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1524 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1525 "\"%s\" option set for the second time", name);
1526
1527 ol->type |= opt_set | issecure;
1528 type = ol->type & opt_mask;
1529
1530 /* Types with data values must be followed by '='; the "no[t]_" prefix
1531 applies only to boolean values. */
1532
1533 if (type < opt_bool || type > opt_bool_last)
1534 {
1535 if (offset != 0)
1536 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1537 "negation prefix applied to a non-boolean option");
1538 if (*s == 0)
1539 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1540 "unexpected end of line (data missing) after %s", name);
1541 if (*s != '=')
1542 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1543 }
1544
1545 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1546 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1547 ultimately expands to one of those values. */
1548
1549 else if (*s != 0 && (offset != 0 || *s != '='))
1550 extra_chars_error(s, US"boolean option ", name, US"");
1551
1552 /* Skip white space after = */
1553
1554 if (*s == '=') while (isspace((*(++s))));
1555
1556 /* If there is a data block and the opt_public flag is not set, change
1557 the data block pointer to the private options block. */
1558
1559 if (data_block != NULL && (ol->type & opt_public) == 0)
1560 data_block = (void *)(((driver_instance *)data_block)->options_block);
1561
1562 /* Now get the data according to the type. */
1563
1564 switch (type)
1565 {
1566 /* If a string value is not enclosed in quotes, it consists of
1567 the rest of the current line, verbatim. Otherwise, string escapes
1568 are processed.
1569
1570 A transport is specified as a string, which is then looked up in the
1571 list of transports. A search type is specified as one of a number of
1572 known strings.
1573
1574 A set or rewrite rules for a driver is specified as a string, which is
1575 then parsed into a suitable chain of control blocks.
1576
1577 Uids and gids are specified as strings which are then looked up in the
1578 passwd file. Lists of uids and gids are similarly specified as colon-
1579 separated strings. */
1580
1581 case opt_stringptr:
1582 case opt_uid:
1583 case opt_gid:
1584 case opt_expand_uid:
1585 case opt_expand_gid:
1586 case opt_uidlist:
1587 case opt_gidlist:
1588 case opt_rewrite:
1589
1590 reset_point = sptr = read_string(s, name);
1591
1592 /* Having read a string, we now have several different ways of using it,
1593 depending on the data type, so do another switch. If keeping the actual
1594 string is not required (because it is interpreted), freesptr is set TRUE,
1595 and at the end we reset the pool. */
1596
1597 switch (type)
1598 {
1599 /* If this was a string, set the variable to point to the new string,
1600 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1601 rules, we still keep the string (for printing), and parse the rules into a
1602 control block and flags word. */
1603
1604 case opt_stringptr:
1605 if (data_block == NULL)
1606 str_target = (uschar **)(ol->value);
1607 else
1608 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1609 if (ol->type & opt_rep_con)
1610 {
1611 /* We already have a condition, we're conducting a crude hack to let
1612 multiple condition rules be chained together, despite storing them in
1613 text form. */
1614 saved_condition = *str_target;
1615 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1616 saved_condition, sptr);
1617 *str_target = string_copy_malloc(strtemp);
1618 /* TODO(pdp): there is a memory leak here and just below
1619 when we set 3 or more conditions; I still don't
1620 understand the store mechanism enough to know
1621 what's the safe way to free content from an earlier store.
1622 AFAICT, stores stack, so freeing an early stored item also stores
1623 all data alloc'd after it. If we knew conditions were adjacent,
1624 we could survive that, but we don't. So I *think* we need to take
1625 another bit from opt_type to indicate "malloced"; this seems like
1626 quite a hack, especially for this one case. It also means that
1627 we can't ever reclaim the store from the *first* condition.
1628
1629 Because we only do this once, near process start-up, I'm prepared to
1630 let this slide for the time being, even though it rankles. */
1631 }
1632 else if (ol->type & opt_rep_str)
1633 {
1634 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1635 int sep_i = -(int)sep_o;
1636 const uschar * list = sptr;
1637 uschar * s;
1638 uschar * list_o = *str_target;
1639
1640 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1641 list_o = string_append_listele(list_o, sep_o, s);
1642 if (list_o)
1643 *str_target = string_copy_malloc(list_o);
1644 }
1645 else
1646 {
1647 *str_target = sptr;
1648 freesptr = FALSE;
1649 }
1650 break;
1651
1652 case opt_rewrite:
1653 if (data_block == NULL)
1654 *((uschar **)(ol->value)) = sptr;
1655 else
1656 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1657 freesptr = FALSE;
1658 if (type == opt_rewrite)
1659 {
1660 int sep = 0;
1661 int *flagptr;
1662 uschar *p = sptr;
1663 rewrite_rule **chain;
1664 optionlist *ol3;
1665
1666 sprintf(CS name2, "*%.50s_rules", name);
1667 ol2 = find_option(name2, oltop, last);
1668 sprintf(CS name2, "*%.50s_flags", name);
1669 ol3 = find_option(name2, oltop, last);
1670
1671 if (ol2 == NULL || ol3 == NULL)
1672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1673 "rewrite rules not available for driver");
1674
1675 if (data_block == NULL)
1676 {
1677 chain = (rewrite_rule **)(ol2->value);
1678 flagptr = (int *)(ol3->value);
1679 }
1680 else
1681 {
1682 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1683 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1684 }
1685
1686 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1687 {
1688 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1689 *chain = next;
1690 chain = &(next->next);
1691 }
1692
1693 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1694 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1695 "non-header rewrite - not allowed at transport time -");
1696 }
1697 break;
1698
1699 /* If it was an expanded uid, see if there is any expansion to be
1700 done by checking for the presence of a $ character. If there is, save it
1701 in the corresponding *expand_user option field. Otherwise, fall through
1702 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1703 of data. */
1704
1705 case opt_expand_uid:
1706 sprintf(CS name2, "*expand_%.50s", name);
1707 ol2 = find_option(name2, oltop, last);
1708 if (ol2 != NULL)
1709 {
1710 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1711
1712 if (data_block == NULL)
1713 *((uschar **)(ol2->value)) = ss;
1714 else
1715 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1716
1717 if (ss != NULL)
1718 {
1719 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1720 freesptr = FALSE;
1721 break;
1722 }
1723 }
1724
1725 /* Look up a fixed uid, and also make use of the corresponding gid
1726 if a passwd entry is returned and the gid has not been set. */
1727
1728 case opt_uid:
1729 if (!route_finduser(sptr, &pw, &uid))
1730 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1731 if (data_block == NULL)
1732 *((uid_t *)(ol->value)) = uid;
1733 else
1734 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1735
1736 /* Set the flag indicating a fixed value is set */
1737
1738 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1739
1740 /* Handle matching gid if we have a passwd entry: done by finding the
1741 same name with terminating "user" changed to "group"; if not found,
1742 ignore. Also ignore if the value is already set. */
1743
1744 if (pw == NULL) break;
1745 Ustrcpy(name+Ustrlen(name)-4, "group");
1746 ol2 = find_option(name, oltop, last);
1747 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1748 (ol2->type & opt_mask) == opt_expand_gid))
1749 {
1750 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1751 if (! *set_flag)
1752 {
1753 if (data_block == NULL)
1754 *((gid_t *)(ol2->value)) = pw->pw_gid;
1755 else
1756 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1757 *set_flag = TRUE;
1758 }
1759 }
1760 break;
1761
1762 /* If it was an expanded gid, see if there is any expansion to be
1763 done by checking for the presence of a $ character. If there is, save it
1764 in the corresponding *expand_user option field. Otherwise, fall through
1765 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1766 of data. */
1767
1768 case opt_expand_gid:
1769 sprintf(CS name2, "*expand_%.50s", name);
1770 ol2 = find_option(name2, oltop, last);
1771 if (ol2 != NULL)
1772 {
1773 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1774
1775 if (data_block == NULL)
1776 *((uschar **)(ol2->value)) = ss;
1777 else
1778 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1779
1780 if (ss != NULL)
1781 {
1782 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1783 freesptr = FALSE;
1784 break;
1785 }
1786 }
1787
1788 /* Handle freestanding gid */
1789
1790 case opt_gid:
1791 if (!route_findgroup(sptr, &gid))
1792 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1793 if (data_block == NULL)
1794 *((gid_t *)(ol->value)) = gid;
1795 else
1796 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1797 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1798 break;
1799
1800 /* If it was a uid list, look up each individual entry, and build
1801 a vector of uids, with a count in the first element. Put the vector
1802 in malloc store so we can free the string. (We are reading into
1803 permanent store already.) */
1804
1805 case opt_uidlist:
1806 {
1807 int count = 1;
1808 uid_t *list;
1809 int ptr = 0;
1810 const uschar *p;
1811 const uschar *op = expand_string (sptr);
1812
1813 if (op == NULL)
1814 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1815 name, expand_string_message);
1816
1817 p = op;
1818 if (*p != 0) count++;
1819 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1820 list = store_malloc(count*sizeof(uid_t));
1821 list[ptr++] = (uid_t)(count - 1);
1822
1823 if (data_block == NULL)
1824 *((uid_t **)(ol->value)) = list;
1825 else
1826 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1827
1828 p = op;
1829 while (count-- > 1)
1830 {
1831 int sep = 0;
1832 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1833 if (!route_finduser(big_buffer, NULL, &uid))
1834 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1835 big_buffer);
1836 list[ptr++] = uid;
1837 }
1838 }
1839 break;
1840
1841 /* If it was a gid list, look up each individual entry, and build
1842 a vector of gids, with a count in the first element. Put the vector
1843 in malloc store so we can free the string. (We are reading into permanent
1844 store already.) */
1845
1846 case opt_gidlist:
1847 {
1848 int count = 1;
1849 gid_t *list;
1850 int ptr = 0;
1851 const uschar *p;
1852 const uschar *op = expand_string (sptr);
1853
1854 if (op == NULL)
1855 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1856 name, expand_string_message);
1857
1858 p = op;
1859 if (*p != 0) count++;
1860 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1861 list = store_malloc(count*sizeof(gid_t));
1862 list[ptr++] = (gid_t)(count - 1);
1863
1864 if (data_block == NULL)
1865 *((gid_t **)(ol->value)) = list;
1866 else
1867 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1868
1869 p = op;
1870 while (count-- > 1)
1871 {
1872 int sep = 0;
1873 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1874 if (!route_findgroup(big_buffer, &gid))
1875 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1876 big_buffer);
1877 list[ptr++] = gid;
1878 }
1879 }
1880 break;
1881 }
1882
1883 /* Release store if the value of the string doesn't need to be kept. */
1884
1885 if (freesptr) store_reset(reset_point);
1886 break;
1887
1888 /* Expanded boolean: if no characters follow, or if there are no dollar
1889 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1890 save the string for later expansion in the alternate place. */
1891
1892 case opt_expand_bool:
1893 if (*s != 0 && Ustrchr(s, '$') != 0)
1894 {
1895 sprintf(CS name2, "*expand_%.50s", name);
1896 ol2 = find_option(name2, oltop, last);
1897 if (ol2 != NULL)
1898 {
1899 reset_point = sptr = read_string(s, name);
1900 if (data_block == NULL)
1901 *((uschar **)(ol2->value)) = sptr;
1902 else
1903 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1904 freesptr = FALSE;
1905 break;
1906 }
1907 }
1908 /* Fall through */
1909
1910 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1911 look for yes/not/true/false. Some booleans are stored in a single bit in
1912 a single int. There's a special fudge for verify settings; without a suffix
1913 they set both xx_sender and xx_recipient. The table points to the sender
1914 value; search subsequently for the recipient. There's another special case:
1915 opt_bool_set also notes when a boolean has been set. */
1916
1917 case opt_bool:
1918 case opt_bit:
1919 case opt_bool_verify:
1920 case opt_bool_set:
1921 if (*s != 0)
1922 {
1923 s = readconf_readname(name2, 64, s);
1924 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1925 boolvalue = TRUE;
1926 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1927 boolvalue = FALSE;
1928 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1929 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1930 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1931 US"for boolean option ", name);
1932 }
1933
1934 /* Handle single-bit type. */
1935
1936 if (type == opt_bit)
1937 {
1938 int bit = 1 << ((ol->type >> 16) & 31);
1939 int *ptr = (data_block == NULL)?
1940 (int *)(ol->value) :
1941 (int *)((uschar *)data_block + (long int)ol->value);
1942 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1943 break;
1944 }
1945
1946 /* Handle full BOOL types */
1947
1948 if (data_block == NULL)
1949 *((BOOL *)(ol->value)) = boolvalue;
1950 else
1951 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1952
1953 /* Verify fudge */
1954
1955 if (type == opt_bool_verify)
1956 {
1957 sprintf(CS name2, "%.50s_recipient", name + offset);
1958 ol2 = find_option(name2, oltop, last);
1959 if (ol2 != NULL)
1960 {
1961 if (data_block == NULL)
1962 *((BOOL *)(ol2->value)) = boolvalue;
1963 else
1964 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1965 }
1966 }
1967
1968 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1969
1970 else if (type == opt_bool_set)
1971 {
1972 sprintf(CS name2, "*set_%.50s", name + offset);
1973 ol2 = find_option(name2, oltop, last);
1974 if (ol2 != NULL)
1975 {
1976 if (data_block == NULL)
1977 *((BOOL *)(ol2->value)) = TRUE;
1978 else
1979 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1980 }
1981 }
1982 break;
1983
1984 /* Octal integer */
1985
1986 case opt_octint:
1987 intbase = 8;
1988 inttype = US"octal ";
1989
1990 /* Integer: a simple(ish) case; allow octal and hex formats, and
1991 suffixes K and M. The different types affect output, not input. */
1992
1993 case opt_mkint:
1994 case opt_int:
1995 {
1996 uschar *endptr;
1997 long int lvalue;
1998
1999 errno = 0;
2000 lvalue = strtol(CS s, CSS &endptr, intbase);
2001
2002 if (endptr == s)
2003 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2004 inttype, name);
2005
2006 if (errno != ERANGE)
2007 {
2008 if (tolower(*endptr) == 'k')
2009 {
2010 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2011 else lvalue *= 1024;
2012 endptr++;
2013 }
2014 else if (tolower(*endptr) == 'm')
2015 {
2016 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2017 errno = ERANGE;
2018 else lvalue *= 1024*1024;
2019 endptr++;
2020 }
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 and
2041 M. */
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 {
2056 if (tolower(*endptr) == 'm')
2057 {
2058 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
2059 else value *= 1024;
2060 endptr++;
2061 }
2062 else if (tolower(*endptr) == 'k')
2063 {
2064 endptr++;
2065 }
2066 else
2067 {
2068 value = (value + 512)/1024;
2069 }
2070 }
2071
2072 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2073 "absolute value of integer \"%s\" is too large (overflow)", s);
2074
2075 while (isspace(*endptr)) endptr++;
2076 if (*endptr != 0)
2077 extra_chars_error(endptr, inttype, US"integer value for ", name);
2078 }
2079
2080 if (data_block == NULL)
2081 *((int *)(ol->value)) = value;
2082 else
2083 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2084 break;
2085
2086 /* Fixed-point number: held to 3 decimal places. */
2087
2088 case opt_fixed:
2089 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2090 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2091 "fixed-point number expected for %s", name);
2092
2093 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2094 "integer \"%s\" is too large (overflow)", s);
2095
2096 value *= 1000;
2097
2098 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2099 "integer \"%s\" is too large (overflow)", s);
2100
2101 if (s[count] == '.')
2102 {
2103 int d = 100;
2104 while (isdigit(s[++count]))
2105 {
2106 value += (s[count] - '0') * d;
2107 d /= 10;
2108 }
2109 }
2110
2111 while (isspace(s[count])) count++;
2112
2113 if (s[count] != 0)
2114 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2115
2116 if (data_block == NULL)
2117 *((int *)(ol->value)) = value;
2118 else
2119 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2120 break;
2121
2122 /* There's a special routine to read time values. */
2123
2124 case opt_time:
2125 value = readconf_readtime(s, 0, FALSE);
2126 if (value < 0)
2127 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2128 name);
2129 if (data_block == NULL)
2130 *((int *)(ol->value)) = value;
2131 else
2132 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2133 break;
2134
2135 /* A time list is a list of colon-separated times, with the first
2136 element holding the size of the list and the second the number of
2137 entries used. */
2138
2139 case opt_timelist:
2140 {
2141 int count = 0;
2142 int *list = (data_block == NULL)?
2143 (int *)(ol->value) :
2144 (int *)((uschar *)data_block + (long int)(ol->value));
2145
2146 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2147 {
2148 int terminator = 0;
2149 uschar *snext = Ustrchr(s, ':');
2150 if (snext != NULL)
2151 {
2152 uschar *ss = snext;
2153 while (ss > s && isspace(ss[-1])) ss--;
2154 terminator = *ss;
2155 }
2156 value = readconf_readtime(s, terminator, FALSE);
2157 if (value < 0)
2158 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2159 name);
2160 if (count > 1 && value <= list[count])
2161 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2162 "time value out of order for %s", name);
2163 list[count+1] = value;
2164 if (snext == NULL) break;
2165 s = snext + 1;
2166 while (isspace(*s)) s++;
2167 }
2168
2169 if (count > list[0] - 2)
2170 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2171 name);
2172 if (count > 0 && list[2] == 0) count = 0;
2173 list[1] = count;
2174 break;
2175 }
2176
2177 case opt_func:
2178 {
2179 void (*fn)() = ol->value;
2180 fn(name, s);
2181 break;
2182 }
2183 }
2184
2185 return TRUE;
2186 }
2187
2188
2189
2190 /*************************************************
2191 * Print a time value *
2192 *************************************************/
2193
2194 /*
2195 Argument: a time value in seconds
2196 Returns: pointer to a fixed buffer containing the time as a string,
2197 in readconf_readtime() format
2198 */
2199
2200 uschar *
2201 readconf_printtime(int t)
2202 {
2203 int s, m, h, d, w;
2204 uschar *p = time_buffer;
2205
2206 if (t < 0)
2207 {
2208 *p++ = '-';
2209 t = -t;
2210 }
2211
2212 s = t % 60;
2213 t /= 60;
2214 m = t % 60;
2215 t /= 60;
2216 h = t % 24;
2217 t /= 24;
2218 d = t % 7;
2219 w = t/7;
2220
2221 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2222 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2223 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2224 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2225 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2226
2227 return time_buffer;
2228 }
2229
2230
2231
2232 /*************************************************
2233 * Print an individual option value *
2234 *************************************************/
2235
2236 /* This is used by the -bP option, so prints to the standard output.
2237 The entire options list is passed in as an argument, because some options come
2238 in pairs - typically uid/gid settings, which can either be explicit numerical
2239 values, or strings to be expanded later. If the numerical value is unset,
2240 search for "*expand_<name>" to see if there is a string equivalent.
2241
2242 Arguments:
2243 ol option entry, or NULL for an unknown option
2244 name option name
2245 options_block NULL for main configuration options; otherwise points to
2246 a driver block; if the option doesn't have opt_public
2247 set, then options_block->options_block is where the item
2248 resides.
2249 oltop points to the option list in which ol exists
2250 last one more than the offset of the last entry in optop
2251 no_labels do not show "foo = " at the start.
2252
2253 Returns: nothing
2254 */
2255
2256 static void
2257 print_ol(optionlist *ol, uschar *name, void *options_block,
2258 optionlist *oltop, int last, BOOL no_labels)
2259 {
2260 struct passwd *pw;
2261 struct group *gr;
2262 optionlist *ol2;
2263 void *value;
2264 uid_t *uidlist;
2265 gid_t *gidlist;
2266 uschar *s;
2267 uschar name2[64];
2268
2269 if (ol == NULL)
2270 {
2271 printf("%s is not a known option\n", name);
2272 return;
2273 }
2274
2275 /* Non-admin callers cannot see options that have been flagged secure by the
2276 "hide" prefix. */
2277
2278 if (!admin_user && (ol->type & opt_secure) != 0)
2279 {
2280 if (no_labels)
2281 printf("%s\n", hidden);
2282 else
2283 printf("%s = %s\n", name, hidden);
2284 return;
2285 }
2286
2287 /* Else show the value of the option */
2288
2289 value = ol->value;
2290 if (options_block != NULL)
2291 {
2292 if ((ol->type & opt_public) == 0)
2293 options_block = (void *)(((driver_instance *)options_block)->options_block);
2294 value = (void *)((uschar *)options_block + (long int)value);
2295 }
2296
2297 switch(ol->type & opt_mask)
2298 {
2299 case opt_stringptr:
2300 case opt_rewrite: /* Show the text value */
2301 s = *((uschar **)value);
2302 if (!no_labels) printf("%s = ", name);
2303 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2304 break;
2305
2306 case opt_int:
2307 if (!no_labels) printf("%s = ", name);
2308 printf("%d\n", *((int *)value));
2309 break;
2310
2311 case opt_mkint:
2312 {
2313 int x = *((int *)value);
2314 if (x != 0 && (x & 1023) == 0)
2315 {
2316 int c = 'K';
2317 x >>= 10;
2318 if ((x & 1023) == 0)
2319 {
2320 c = 'M';
2321 x >>= 10;
2322 }
2323 if (!no_labels) printf("%s = ", name);
2324 printf("%d%c\n", x, c);
2325 }
2326 else
2327 {
2328 if (!no_labels) printf("%s = ", name);
2329 printf("%d\n", x);
2330 }
2331 }
2332 break;
2333
2334 case opt_Kint:
2335 {
2336 int x = *((int *)value);
2337 if (!no_labels) printf("%s = ", name);
2338 if (x == 0) printf("0\n");
2339 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2340 else printf("%dK\n", x);
2341 }
2342 break;
2343
2344 case opt_octint:
2345 if (!no_labels) printf("%s = ", name);
2346 printf("%#o\n", *((int *)value));
2347 break;
2348
2349 /* Can be negative only when "unset", in which case integer */
2350
2351 case opt_fixed:
2352 {
2353 int x = *((int *)value);
2354 int f = x % 1000;
2355 int d = 100;
2356 if (x < 0) printf("%s =\n", name); else
2357 {
2358 if (!no_labels) printf("%s = ", name);
2359 printf("%d.", x/1000);
2360 do
2361 {
2362 printf("%d", f/d);
2363 f %= d;
2364 d /= 10;
2365 }
2366 while (f != 0);
2367 printf("\n");
2368 }
2369 }
2370 break;
2371
2372 /* If the numerical value is unset, try for the string value */
2373
2374 case opt_expand_uid:
2375 if (! *get_set_flag(name, oltop, last, options_block))
2376 {
2377 sprintf(CS name2, "*expand_%.50s", name);
2378 ol2 = find_option(name2, oltop, last);
2379 if (ol2 != NULL)
2380 {
2381 void *value2 = ol2->value;
2382 if (options_block != NULL)
2383 value2 = (void *)((uschar *)options_block + (long int)value2);
2384 s = *((uschar **)value2);
2385 if (!no_labels) printf("%s = ", name);
2386 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2387 break;
2388 }
2389 }
2390
2391 /* Else fall through */
2392
2393 case opt_uid:
2394 if (!no_labels) printf("%s = ", name);
2395 if (! *get_set_flag(name, oltop, last, options_block))
2396 printf("\n");
2397 else
2398 {
2399 pw = getpwuid(*((uid_t *)value));
2400 if (pw == NULL)
2401 printf("%ld\n", (long int)(*((uid_t *)value)));
2402 else printf("%s\n", pw->pw_name);
2403 }
2404 break;
2405
2406 /* If the numerical value is unset, try for the string value */
2407
2408 case opt_expand_gid:
2409 if (! *get_set_flag(name, oltop, last, options_block))
2410 {
2411 sprintf(CS name2, "*expand_%.50s", name);
2412 ol2 = find_option(name2, oltop, last);
2413 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2414 {
2415 void *value2 = ol2->value;
2416 if (options_block != NULL)
2417 value2 = (void *)((uschar *)options_block + (long int)value2);
2418 s = *((uschar **)value2);
2419 if (!no_labels) printf("%s = ", name);
2420 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2421 break;
2422 }
2423 }
2424
2425 /* Else fall through */
2426
2427 case opt_gid:
2428 if (!no_labels) printf("%s = ", name);
2429 if (! *get_set_flag(name, oltop, last, options_block))
2430 printf("\n");
2431 else
2432 {
2433 gr = getgrgid(*((int *)value));
2434 if (gr == NULL)
2435 printf("%ld\n", (long int)(*((int *)value)));
2436 else printf("%s\n", gr->gr_name);
2437 }
2438 break;
2439
2440 case opt_uidlist:
2441 uidlist = *((uid_t **)value);
2442 if (!no_labels) printf("%s =", name);
2443 if (uidlist != NULL)
2444 {
2445 int i;
2446 uschar sep = ' ';
2447 if (no_labels) sep = '\0';
2448 for (i = 1; i <= (int)(uidlist[0]); i++)
2449 {
2450 uschar *name = NULL;
2451 pw = getpwuid(uidlist[i]);
2452 if (pw != NULL) name = US pw->pw_name;
2453 if (sep != '\0') printf("%c", sep);
2454 if (name != NULL) printf("%s", name);
2455 else printf("%ld", (long int)(uidlist[i]));
2456 sep = ':';
2457 }
2458 }
2459 printf("\n");
2460 break;
2461
2462 case opt_gidlist:
2463 gidlist = *((gid_t **)value);
2464 if (!no_labels) printf("%s =", name);
2465 if (gidlist != NULL)
2466 {
2467 int i;
2468 uschar sep = ' ';
2469 if (no_labels) sep = '\0';
2470 for (i = 1; i <= (int)(gidlist[0]); i++)
2471 {
2472 uschar *name = NULL;
2473 gr = getgrgid(gidlist[i]);
2474 if (gr != NULL) name = US gr->gr_name;
2475 if (sep != '\0') printf("%c", sep);
2476 if (name != NULL) printf("%s", name);
2477 else printf("%ld", (long int)(gidlist[i]));
2478 sep = ':';
2479 }
2480 }
2481 printf("\n");
2482 break;
2483
2484 case opt_time:
2485 if (!no_labels) printf("%s = ", name);
2486 printf("%s\n", readconf_printtime(*((int *)value)));
2487 break;
2488
2489 case opt_timelist:
2490 {
2491 int i;
2492 int *list = (int *)value;
2493 if (!no_labels) printf("%s = ", name);
2494 for (i = 0; i < list[1]; i++)
2495 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2496 printf("\n");
2497 }
2498 break;
2499
2500 case opt_bit:
2501 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2502 "" : "no_", name);
2503 break;
2504
2505 case opt_expand_bool:
2506 sprintf(CS name2, "*expand_%.50s", name);
2507 ol2 = find_option(name2, oltop, last);
2508 if (ol2 != NULL && ol2->value != NULL)
2509 {
2510 void *value2 = ol2->value;
2511 if (options_block != NULL)
2512 value2 = (void *)((uschar *)options_block + (long int)value2);
2513 s = *((uschar **)value2);
2514 if (s != NULL)
2515 {
2516 if (!no_labels) printf("%s = ", name);
2517 printf("%s\n", string_printing(s));
2518 break;
2519 }
2520 /* s == NULL => string not set; fall through */
2521 }
2522
2523 /* Fall through */
2524
2525 case opt_bool:
2526 case opt_bool_verify:
2527 case opt_bool_set:
2528 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2529 break;
2530 }
2531 }
2532
2533
2534
2535 /*************************************************
2536 * Print value from main configuration *
2537 *************************************************/
2538
2539 /* This function, called as a result of encountering the -bP option,
2540 causes the value of any main configuration variable to be output if the
2541 second argument is NULL. There are some special values:
2542
2543 all print all main configuration options
2544 config_file print the name of the configuration file
2545 (configure_file will still work, for backward
2546 compatibility)
2547 routers print the routers' configurations
2548 transports print the transports' configuration
2549 authenticators print the authenticators' configuration
2550 macros print the macros' configuration
2551 router_list print a list of router names
2552 transport_list print a list of transport names
2553 authenticator_list print a list of authentication mechanism names
2554 macro_list print a list of macro names
2555 +name print a named list item
2556 local_scan print the local_scan options
2557 config print the configuration as it is parsed
2558 environment print the used execution environment
2559
2560 If the second argument is not NULL, it must be one of "router", "transport",
2561 "authenticator" or "macro" in which case the first argument identifies the
2562 driver whose options are to be printed.
2563
2564 Arguments:
2565 name option name if type == NULL; else driver name
2566 type NULL or driver type name, as described above
2567 no_labels avoid the "foo = " at the start of an item
2568
2569 Returns: nothing
2570 */
2571
2572 void
2573 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2574 {
2575 BOOL names_only = FALSE;
2576 optionlist *ol;
2577 optionlist *ol2 = NULL;
2578 driver_instance *d = NULL;
2579 macro_item *m;
2580 int size = 0;
2581
2582 if (type == NULL)
2583 {
2584 if (*name == '+')
2585 {
2586 int i;
2587 tree_node *t;
2588 BOOL found = FALSE;
2589 static uschar *types[] = { US"address", US"domain", US"host",
2590 US"localpart" };
2591 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2592 &hostlist_anchor, &localpartlist_anchor };
2593
2594 for (i = 0; i < 4; i++)
2595 {
2596 t = tree_search(*(anchors[i]), name+1);
2597 if (t != NULL)
2598 {
2599 found = TRUE;
2600 if (no_labels)
2601 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2602 else
2603 printf("%slist %s = %s\n", types[i], name+1,
2604 ((namedlist_block *)(t->data.ptr))->string);
2605 }
2606 }
2607
2608 if (!found)
2609 printf("no address, domain, host, or local part list called \"%s\" "
2610 "exists\n", name+1);
2611
2612 return;
2613 }
2614
2615 if ( Ustrcmp(name, "configure_file") == 0
2616 ||Ustrcmp(name, "config_file") == 0)
2617 {
2618 printf("%s\n", CS config_main_filename);
2619 return;
2620 }
2621
2622 if (Ustrcmp(name, "all") == 0)
2623 {
2624 for (ol = optionlist_config;
2625 ol < optionlist_config + optionlist_config_size; ol++)
2626 {
2627 if ((ol->type & opt_hidden) == 0)
2628 print_ol(ol, US ol->name, NULL,
2629 optionlist_config, optionlist_config_size,
2630 no_labels);
2631 }
2632 return;
2633 }
2634
2635 if (Ustrcmp(name, "local_scan") == 0)
2636 {
2637 #ifndef LOCAL_SCAN_HAS_OPTIONS
2638 printf("local_scan() options are not supported\n");
2639 #else
2640 for (ol = local_scan_options;
2641 ol < local_scan_options + local_scan_options_count; ol++)
2642 {
2643 print_ol(ol, US ol->name, NULL, local_scan_options,
2644 local_scan_options_count, no_labels);
2645 }
2646 #endif
2647 return;
2648 }
2649
2650 if (Ustrcmp(name, "config") == 0)
2651 {
2652 print_config(admin_user, no_labels);
2653 return;
2654 }
2655
2656 if (Ustrcmp(name, "routers") == 0)
2657 {
2658 type = US"router";
2659 name = NULL;
2660 }
2661 else if (Ustrcmp(name, "transports") == 0)
2662 {
2663 type = US"transport";
2664 name = NULL;
2665 }
2666
2667 else if (Ustrcmp(name, "authenticators") == 0)
2668 {
2669 type = US"authenticator";
2670 name = NULL;
2671 }
2672
2673 else if (Ustrcmp(name, "macros") == 0)
2674 {
2675 type = US"macro";
2676 name = NULL;
2677 }
2678
2679 else if (Ustrcmp(name, "router_list") == 0)
2680 {
2681 type = US"router";
2682 name = NULL;
2683 names_only = TRUE;
2684 }
2685
2686 else if (Ustrcmp(name, "transport_list") == 0)
2687 {
2688 type = US"transport";
2689 name = NULL;
2690 names_only = TRUE;
2691 }
2692
2693 else if (Ustrcmp(name, "authenticator_list") == 0)
2694 {
2695 type = US"authenticator";
2696 name = NULL;
2697 names_only = TRUE;
2698 }
2699
2700 else if (Ustrcmp(name, "macro_list") == 0)
2701 {
2702 type = US"macro";
2703 name = NULL;
2704 names_only = TRUE;
2705 }
2706
2707 else if (Ustrcmp(name, "environment") == 0)
2708 {
2709 if (environ)
2710 {
2711 uschar ** p;
2712 for (p = USS environ; *p; p++) ;
2713 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2714
2715 for (p = USS environ; *p; p++)
2716 {
2717 uschar * q;
2718 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2719 puts(CS *p);
2720 }
2721 }
2722 return;
2723 }
2724
2725 else
2726 {
2727 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2728 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2729 return;
2730 }
2731 }
2732
2733 /* Handle the options for a router or transport. Skip options that are flagged
2734 as hidden. Some of these are options with names starting with '*', used for
2735 internal alternative representations of other options (which the printing
2736 function will sort out). Others are synonyms kept for backward compatibility.
2737 */
2738
2739 if (Ustrcmp(type, "router") == 0)
2740 {
2741 d = (driver_instance *)routers;
2742 ol2 = optionlist_routers;
2743 size = optionlist_routers_size;
2744 }
2745 else if (Ustrcmp(type, "transport") == 0)
2746 {
2747 d = (driver_instance *)transports;
2748 ol2 = optionlist_transports;
2749 size = optionlist_transports_size;
2750 }
2751 else if (Ustrcmp(type, "authenticator") == 0)
2752 {
2753 d = (driver_instance *)auths;
2754 ol2 = optionlist_auths;
2755 size = optionlist_auths_size;
2756 }
2757
2758 else if (Ustrcmp(type, "macro") == 0)
2759 {
2760 /* People store passwords in macros and they were previously not available
2761 for printing. So we have an admin_users restriction. */
2762 if (!admin_user)
2763 {
2764 fprintf(stderr, "exim: permission denied\n");
2765 exit(EXIT_FAILURE);
2766 }
2767 for (m = macros; m != NULL; m = m->next)
2768 {
2769 if (name == NULL || Ustrcmp(name, m->name) == 0)
2770 {
2771 if (names_only)
2772 printf("%s\n", CS m->name);
2773 else
2774 printf("%s=%s\n", CS m->name, CS m->replacement);
2775 if (name != NULL)
2776 return;
2777 }
2778 }
2779 if (name != NULL)
2780 printf("%s %s not found\n", type, name);
2781 return;
2782 }
2783
2784 if (names_only)
2785 {
2786 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2787 return;
2788 }
2789
2790 /* Either search for a given driver, or print all of them */
2791
2792 for (; d != NULL; d = d->next)
2793 {
2794 if (name == NULL)
2795 printf("\n%s %s:\n", d->name, type);
2796 else if (Ustrcmp(d->name, name) != 0) continue;
2797
2798 for (ol = ol2; ol < ol2 + size; ol++)
2799 {
2800 if ((ol->type & opt_hidden) == 0)
2801 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2802 }
2803
2804 for (ol = d->info->options;
2805 ol < d->info->options + *(d->info->options_count); ol++)
2806 {
2807 if ((ol->type & opt_hidden) == 0)
2808 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2809 }
2810 if (name != NULL) return;
2811 }
2812 if (name != NULL) printf("%s %s not found\n", type, name);
2813 }
2814
2815
2816
2817 /*************************************************
2818 * Read a named list item *
2819 *************************************************/
2820
2821 /* This function reads a name and a list (i.e. string). The name is used to
2822 save the list in a tree, sorted by its name. Each entry also has a number,
2823 which can be used for caching tests, but if the string contains any expansion
2824 items other than $key, the number is set negative to inhibit caching. This
2825 mechanism is used for domain, host, and address lists that are referenced by
2826 the "+name" syntax.
2827
2828 Arguments:
2829 anchorp points to the tree anchor
2830 numberp points to the current number for this tree
2831 max the maximum number permitted
2832 s the text of the option line, starting immediately after the name
2833 of the list type
2834 tname the name of the list type, for messages
2835
2836 Returns: nothing
2837 */
2838
2839 static void
2840 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2841 uschar *tname)
2842 {
2843 BOOL forcecache = FALSE;
2844 uschar *ss;
2845 tree_node *t;
2846 namedlist_block *nb = store_get(sizeof(namedlist_block));
2847
2848 if (Ustrncmp(s, "_cache", 6) == 0)
2849 {
2850 forcecache = TRUE;
2851 s += 6;
2852 }
2853
2854 if (!isspace(*s))
2855 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2856
2857 if (*numberp >= max)
2858 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2859 tname, max);
2860
2861 while (isspace(*s)) s++;
2862 ss = s;
2863 while (isalnum(*s) || *s == '_') s++;
2864 t = store_get(sizeof(tree_node) + s-ss);
2865 Ustrncpy(t->name, ss, s-ss);
2866 t->name[s-ss] = 0;
2867 while (isspace(*s)) s++;
2868
2869 if (!tree_insertnode(anchorp, t))
2870 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2871 "duplicate name \"%s\" for a named %s", t->name, tname);
2872
2873 t->data.ptr = nb;
2874 nb->number = *numberp;
2875 *numberp += 1;
2876
2877 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2878 "missing '=' after \"%s\"", t->name);
2879 while (isspace(*s)) s++;
2880 nb->string = read_string(s, t->name);
2881 nb->cache_data = NULL;
2882
2883 /* Check the string for any expansions; if any are found, mark this list
2884 uncacheable unless the user has explicited forced caching. */
2885
2886 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2887 }
2888
2889
2890
2891
2892 /*************************************************
2893 * Unpick data for a rate limit *
2894 *************************************************/
2895
2896 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2897 separate values.
2898
2899 Arguments:
2900 s string, in the form t,b,f,l
2901 where t is the threshold (integer)
2902 b is the initial delay (time)
2903 f is the multiplicative factor (fixed point)
2904 k is the maximum time (time)
2905 threshold where to store threshold
2906 base where to store base in milliseconds
2907 factor where to store factor in milliseconds
2908 limit where to store limit
2909
2910 Returns: nothing (panics on error)
2911 */
2912
2913 static void
2914 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2915 int *limit)
2916 {
2917 uschar bstring[16], lstring[16];
2918
2919 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2920 factor, lstring) == 4)
2921 {
2922 *base = readconf_readtime(bstring, 0, TRUE);
2923 *limit = readconf_readtime(lstring, 0, TRUE);
2924 if (*base >= 0 && *limit >= 0) return;
2925 }
2926 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2927 }
2928
2929
2930
2931
2932 /*************************************************
2933 * Drop privs for checking TLS config *
2934 *************************************************/
2935
2936 /* We want to validate TLS options during readconf, but do not want to be
2937 root when we call into the TLS library, in case of library linkage errors
2938 which cause segfaults; before this check, those were always done as the Exim
2939 runtime user and it makes sense to continue with that.
2940
2941 Assumes: tls_require_ciphers has been set, if it will be
2942 exim_user has been set, if it will be
2943 exim_group has been set, if it will be
2944
2945 Returns: bool for "okay"; false will cause caller to immediately exit.
2946 */
2947
2948 #ifdef SUPPORT_TLS
2949 static BOOL
2950 tls_dropprivs_validate_require_cipher(BOOL nowarn)
2951 {
2952 const uschar *errmsg;
2953 pid_t pid;
2954 int rc, status;
2955 void (*oldsignal)(int);
2956
2957 /* If TLS will never be used, no point checking ciphers */
2958
2959 if ( !tls_advertise_hosts
2960 || !*tls_advertise_hosts
2961 || Ustrcmp(tls_advertise_hosts, ":") == 0
2962 )
2963 return TRUE;
2964 else if (!nowarn && !tls_certificate)
2965 log_write(0, LOG_MAIN|LOG_PANIC,
2966 "Warning: No server certificate defined; TLS connections will fail.\n"
2967 " Suggested action: either install a certificate or change tls_advertise_hosts option");
2968
2969 oldsignal = signal(SIGCHLD, SIG_DFL);
2970
2971 fflush(NULL);
2972 if ((pid = fork()) < 0)
2973 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2974
2975 if (pid == 0)
2976 {
2977 /* in some modes, will have dropped privilege already */
2978 if (!geteuid())
2979 exim_setugid(exim_uid, exim_gid, FALSE,
2980 US"calling tls_validate_require_cipher");
2981
2982 errmsg = tls_validate_require_cipher();
2983 if (errmsg)
2984 {
2985 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2986 "tls_require_ciphers invalid: %s", errmsg);
2987 }
2988 fflush(NULL);
2989 _exit(0);
2990 }
2991
2992 do {
2993 rc = waitpid(pid, &status, 0);
2994 } while (rc < 0 && errno == EINTR);
2995
2996 DEBUG(D_tls)
2997 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2998 (int)pid, status);
2999
3000 signal(SIGCHLD, oldsignal);
3001
3002 return status == 0;
3003 }
3004 #endif /* SUPPORT_TLS */
3005
3006
3007
3008
3009 /*************************************************
3010 * Read main configuration options *
3011 *************************************************/
3012
3013 /* This function is the first to be called for configuration reading. It
3014 opens the configuration file and reads general configuration settings until
3015 it reaches the end of the configuration section. The file is then left open so
3016 that the remaining configuration data can subsequently be read if needed for
3017 this run of Exim.
3018
3019 The configuration file must be owned either by root or exim, and be writeable
3020 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3021 in the config file, so the test is done on the compiled in values. A slight
3022 anomaly, to be carefully documented.
3023
3024 The name of the configuration file is taken from a list that is included in the
3025 binary of Exim. It can be altered from the command line, but if that is done,
3026 root privilege is immediately withdrawn unless the caller is root or exim.
3027 The first file on the list that exists is used.
3028
3029 For use on multiple systems that share file systems, first look for a
3030 configuration file whose name has the current node name on the end. If that is
3031 not found, try the generic name. For really contorted configurations, that run
3032 multiple Exims with different uid settings, first try adding the effective uid
3033 before the node name. These complications are going to waste resources on most
3034 systems. Therefore they are available only when requested by compile-time
3035 options. */
3036
3037 void
3038 readconf_main(BOOL nowarn)
3039 {
3040 int sep = 0;
3041 struct stat statbuf;
3042 uschar *s, *filename;
3043 const uschar *list = config_main_filelist;
3044
3045 /* Loop through the possible file names */
3046
3047 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
3048 != NULL)
3049 {
3050
3051 /* Cut out all the fancy processing unless specifically wanted */
3052
3053 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3054 uschar *suffix = filename + Ustrlen(filename);
3055
3056 /* Try for the node-specific file if a node name exists */
3057
3058 #ifdef CONFIGURE_FILE_USE_NODE
3059 struct utsname uts;
3060 if (uname(&uts) >= 0)
3061 {
3062 #ifdef CONFIGURE_FILE_USE_EUID
3063 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3064 config_file = Ufopen(filename, "rb");
3065 if (config_file == NULL)
3066 #endif /* CONFIGURE_FILE_USE_EUID */
3067 {
3068 sprintf(CS suffix, ".%.256s", uts.nodename);
3069 config_file = Ufopen(filename, "rb");
3070 }
3071 }
3072 #endif /* CONFIGURE_FILE_USE_NODE */
3073
3074 /* Otherwise, try the generic name, possibly with the euid added */
3075
3076 #ifdef CONFIGURE_FILE_USE_EUID
3077 if (config_file == NULL)
3078 {
3079 sprintf(CS suffix, ".%ld", (long int)original_euid);
3080 config_file = Ufopen(filename, "rb");
3081 }
3082 #endif /* CONFIGURE_FILE_USE_EUID */
3083
3084 /* Finally, try the unadorned name */
3085
3086 if (config_file == NULL)
3087 {
3088 *suffix = 0;
3089 config_file = Ufopen(filename, "rb");
3090 }
3091 #else /* if neither defined */
3092
3093 /* This is the common case when the fancy processing is not included. */
3094
3095 config_file = Ufopen(filename, "rb");
3096 #endif
3097
3098 /* If the file does not exist, continue to try any others. For any other
3099 error, break out (and die). */
3100
3101 if (config_file != NULL || errno != ENOENT) break;
3102 }
3103
3104 /* Now, once we found and opened our configuration file, we change the directory
3105 to a safe place. Later we change to $spool_directory. */
3106
3107 if (Uchdir("/") < 0)
3108 {
3109 perror("exim: chdir `/': ");
3110 exit(EXIT_FAILURE);
3111 }
3112
3113 /* On success, save the name for verification; config_filename is used when
3114 logging configuration errors (it changes for .included files) whereas
3115 config_main_filename is the name shown by -bP. Failure to open a configuration
3116 file is a serious disaster. */
3117
3118 if (config_file != NULL)
3119 {
3120 uschar *p;
3121 config_filename = config_main_filename = string_copy(filename);
3122
3123 p = Ustrrchr(filename, '/');
3124 config_main_directory = p ? string_copyn(filename, p - filename)
3125 : string_copy(US".");
3126 }
3127 else
3128 {
3129 if (filename == NULL)
3130 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3131 "%s", config_main_filelist);
3132 else
3133 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3134 "configuration file %s", filename));
3135 }
3136
3137 /* Check the status of the file we have opened, if we have retained root
3138 privileges and the file isn't /dev/null (which *should* be 0666). */
3139
3140 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3141 {
3142 if (fstat(fileno(config_file), &statbuf) != 0)
3143 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3144 big_buffer);
3145
3146 if ((statbuf.st_uid != root_uid /* owner not root */
3147 #ifdef CONFIGURE_OWNER
3148 && statbuf.st_uid != config_uid /* owner not the special one */
3149 #endif
3150 ) || /* or */
3151 (statbuf.st_gid != root_gid /* group not root & */
3152 #ifdef CONFIGURE_GROUP
3153 && statbuf.st_gid != config_gid /* group not the special one */
3154 #endif
3155 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3156 /* or */
3157 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3158
3159 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3160 "wrong owner, group, or mode", big_buffer);
3161 }
3162
3163 /* Process the main configuration settings. They all begin with a lower case
3164 letter. If we see something starting with an upper case letter, it is taken as
3165 a macro definition. */
3166
3167 while ((s = get_config_line()) != NULL)
3168 {
3169 if (isupper(s[0])) read_macro_assignment(s);
3170
3171 else if (Ustrncmp(s, "domainlist", 10) == 0)
3172 read_named_list(&domainlist_anchor, &domainlist_count,
3173 MAX_NAMED_LIST, s+10, US"domain list");
3174
3175 else if (Ustrncmp(s, "hostlist", 8) == 0)
3176 read_named_list(&hostlist_anchor, &hostlist_count,
3177 MAX_NAMED_LIST, s+8, US"host list");
3178
3179 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3180 read_named_list(&addresslist_anchor, &addresslist_count,
3181 MAX_NAMED_LIST, s+11, US"address list");
3182
3183 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3184 read_named_list(&localpartlist_anchor, &localpartlist_count,
3185 MAX_NAMED_LIST, s+13, US"local part list");
3186
3187 else
3188 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3189 NULL, US"main option \"%s\" unknown");
3190 }
3191
3192
3193 /* If local_sender_retain is set, local_from_check must be unset. */
3194
3195 if (local_sender_retain && local_from_check)
3196 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3197 "local_sender_retain are set; this combination is not allowed");
3198
3199 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3200 wanted. */
3201
3202 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3203
3204 /* The max retry interval must not be greater than 24 hours. */
3205
3206 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3207
3208 /* remote_max_parallel must be > 0 */
3209
3210 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3211
3212 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3213 start of a new SMTP message. */
3214
3215 freeze_tell_config = freeze_tell;
3216
3217 /* The primary host name may be required for expansion of spool_directory
3218 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3219 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3220 canonize it. Some people like upper case letters in their host names, so we
3221 don't force the case. */
3222
3223 if (primary_hostname == NULL)
3224 {
3225 const uschar *hostname;
3226 struct utsname uts;
3227 if (uname(&uts) < 0)
3228 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3229 hostname = US uts.nodename;
3230
3231 if (Ustrchr(hostname, '.') == NULL)
3232 {
3233 int af = AF_INET;
3234 struct hostent *hostdata;
3235
3236 #if HAVE_IPV6
3237 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3238 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3239 MCL_DOMAIN, TRUE, NULL) != OK))
3240 af = AF_INET6;
3241 #else
3242 af = AF_INET;
3243 #endif
3244
3245 for (;;)
3246 {
3247 #if HAVE_IPV6
3248 #if HAVE_GETIPNODEBYNAME
3249 int error_num;
3250 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3251 #else
3252 hostdata = gethostbyname2(CS hostname, af);
3253 #endif
3254 #else
3255 hostdata = gethostbyname(CS hostname);
3256 #endif
3257
3258 if (hostdata != NULL)
3259 {
3260 hostname = US hostdata->h_name;
3261 break;
3262 }
3263
3264 if (af == AF_INET) break;
3265 af = AF_INET;
3266 }
3267 }
3268
3269 primary_hostname = string_copy(hostname);
3270 }
3271
3272 /* Set up default value for smtp_active_hostname */
3273
3274 smtp_active_hostname = primary_hostname;
3275
3276 /* If spool_directory wasn't set in the build-time configuration, it must have
3277 got set above. Of course, writing to the log may not work if log_file_path is