fd9657e0e763d0d3035fd22aa2bee32730fa57a5
[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 static void readconf_options_auths(void);
21
22
23 #define CSTATE_STACK_SIZE 10
24
25 const uschar *config_directory = NULL;
26
27
28 /* Structure for chain (stack) of .included files */
29
30 typedef struct config_file_item {
31 struct config_file_item *next;
32 const uschar *filename;
33 const uschar *directory;
34 FILE *file;
35 int lineno;
36 } config_file_item;
37
38 /* Structure for chain of configuration lines (-bP config) */
39
40 typedef struct config_line_item {
41 struct config_line_item *next;
42 uschar *line;
43 } config_line_item;
44
45 static config_line_item* config_lines;
46
47 /* Structure of table of conditional words and their state transitions */
48
49 typedef struct cond_item {
50 uschar *name;
51 int namelen;
52 int action1;
53 int action2;
54 int pushpop;
55 } cond_item;
56
57 /* Structure of table of syslog facility names and values */
58
59 typedef struct syslog_fac_item {
60 uschar *name;
61 int value;
62 } syslog_fac_item;
63
64 /* constants */
65 static const char * const hidden = "<value not displayable>";
66
67 /* Static variables */
68
69 static config_file_item *config_file_stack = NULL; /* For includes */
70
71 static uschar *syslog_facility_str = NULL;
72 static uschar next_section[24];
73 static uschar time_buffer[24];
74
75 /* State variables for conditional loading (.ifdef / .else / .endif) */
76
77 static int cstate = 0;
78 static int cstate_stack_ptr = -1;
79 static int cstate_stack[CSTATE_STACK_SIZE];
80
81 /* Table of state transitions for handling conditional inclusions. There are
82 four possible state transitions:
83
84 .ifdef true
85 .ifdef false
86 .elifdef true (or .else)
87 .elifdef false
88
89 .endif just causes the previous cstate to be popped off the stack */
90
91 static int next_cstate[3][4] =
92 {
93 /* State 0: reading from file, or reading until next .else or .endif */
94 { 0, 1, 2, 2 },
95 /* State 1: condition failed, skipping until next .else or .endif */
96 { 2, 2, 0, 1 },
97 /* State 2: skipping until .endif */
98 { 2, 2, 2, 2 },
99 };
100
101 /* Table of conditionals and the states to set. For each name, there are four
102 values: the length of the name (to save computing it each time), the state to
103 set if a macro was found in the line, the state to set if a macro was not found
104 in the line, and a stack manipulation setting which is:
105
106 -1 pull state value off the stack
107 0 don't alter the stack
108 +1 push value onto stack, before setting new state
109 */
110
111 static cond_item cond_list[] = {
112 { US"ifdef", 5, 0, 1, 1 },
113 { US"ifndef", 6, 1, 0, 1 },
114 { US"elifdef", 7, 2, 3, 0 },
115 { US"elifndef", 8, 3, 2, 0 },
116 { US"else", 4, 2, 2, 0 },
117 { US"endif", 5, 0, 0, -1 }
118 };
119
120 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
121
122 /* Table of syslog facility names and their values */
123
124 static syslog_fac_item syslog_list[] = {
125 { US"mail", LOG_MAIL },
126 { US"user", LOG_USER },
127 { US"news", LOG_NEWS },
128 { US"uucp", LOG_UUCP },
129 { US"local0", LOG_LOCAL0 },
130 { US"local1", LOG_LOCAL1 },
131 { US"local2", LOG_LOCAL2 },
132 { US"local3", LOG_LOCAL3 },
133 { US"local4", LOG_LOCAL4 },
134 { US"local5", LOG_LOCAL5 },
135 { US"local6", LOG_LOCAL6 },
136 { US"local7", LOG_LOCAL7 },
137 { US"daemon", LOG_DAEMON }
138 };
139
140 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
141
142
143
144
145 /*************************************************
146 * Main configuration options *
147 *************************************************/
148
149 /* The list of options that can be set in the main configuration file. This
150 must be in alphabetic order because it is searched by binary chop. */
151
152 static optionlist optionlist_config[] = {
153 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
154 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
155 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
156 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
157 { "accept_8bitmime", opt_bool, &accept_8bitmime },
158 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
159 #ifdef WITH_CONTENT_SCAN
160 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
161 #endif
162 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
163 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
164 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
165 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
166 #ifndef DISABLE_PRDR
167 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
168 #endif
169 #ifndef DISABLE_DKIM
170 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
171 #endif
172 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
173 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
174 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
175 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
176 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
177 #ifdef WITH_CONTENT_SCAN
178 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
179 #endif
180 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
181 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
182 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
183 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
184 #ifdef SUPPORT_TLS
185 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
186 #endif
187 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
188 { "add_environment", opt_stringptr, &add_environment },
189 { "admin_groups", opt_gidlist, &admin_groups },
190 { "allow_domain_literals", opt_bool, &allow_domain_literals },
191 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
192 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
193 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
194 { "auto_thaw", opt_time, &auto_thaw },
195 #ifdef WITH_CONTENT_SCAN
196 { "av_scanner", opt_stringptr, &av_scanner },
197 #endif
198 { "bi_command", opt_stringptr, &bi_command },
199 #ifdef EXPERIMENTAL_BRIGHTMAIL
200 { "bmi_config_file", opt_stringptr, &bmi_config_file },
201 #endif
202 { "bounce_message_file", opt_stringptr, &bounce_message_file },
203 { "bounce_message_text", opt_stringptr, &bounce_message_text },
204 { "bounce_return_body", opt_bool, &bounce_return_body },
205 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
206 { "bounce_return_message", opt_bool, &bounce_return_message },
207 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
208 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
209 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
210 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
211 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
212 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
213 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
214 { "check_log_inodes", opt_int, &check_log_inodes },
215 { "check_log_space", opt_Kint, &check_log_space },
216 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
217 { "check_spool_inodes", opt_int, &check_spool_inodes },
218 { "check_spool_space", opt_Kint, &check_spool_space },
219 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
220 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
221 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
222 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
223 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
224 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
225 #ifdef EXPERIMENTAL_DCC
226 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
227 { "dccifd_address", opt_stringptr, &dccifd_address },
228 { "dccifd_options", opt_stringptr, &dccifd_options },
229 #endif
230 { "debug_store", opt_bool, &debug_store },
231 { "delay_warning", opt_timelist, &delay_warning },
232 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
233 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
234 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
235 { "delivery_date_remove", opt_bool, &delivery_date_remove },
236 #ifdef ENABLE_DISABLE_FSYNC
237 { "disable_fsync", opt_bool, &disable_fsync },
238 #endif
239 { "disable_ipv6", opt_bool, &disable_ipv6 },
240 #ifndef DISABLE_DKIM
241 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
242 #endif
243 #ifdef EXPERIMENTAL_DMARC
244 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
245 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
246 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
247 #endif
248 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
249 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
250 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
251 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
252 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
253 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
254 { "dns_retrans", opt_time, &dns_retrans },
255 { "dns_retry", opt_int, &dns_retry },
256 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
257 { "dns_use_edns0", opt_int, &dns_use_edns0 },
258 /* This option is now a no-op, retained for compatibility */
259 { "drop_cr", opt_bool, &drop_cr },
260 /*********************************************************/
261 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
262 { "dsn_from", opt_stringptr, &dsn_from },
263 { "envelope_to_remove", opt_bool, &envelope_to_remove },
264 { "errors_copy", opt_stringptr, &errors_copy },
265 { "errors_reply_to", opt_stringptr, &errors_reply_to },
266 #ifndef DISABLE_EVENT
267 { "event_action", opt_stringptr, &event_action },
268 #endif
269 { "exim_group", opt_gid, &exim_gid },
270 { "exim_path", opt_stringptr, &exim_path },
271 { "exim_user", opt_uid, &exim_uid },
272 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
273 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
274 { "finduser_retries", opt_int, &finduser_retries },
275 { "freeze_tell", opt_stringptr, &freeze_tell },
276 { "gecos_name", opt_stringptr, &gecos_name },
277 { "gecos_pattern", opt_stringptr, &gecos_pattern },
278 #ifdef SUPPORT_TLS
279 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
280 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
281 #endif
282 { "header_line_maxsize", opt_int, &header_line_maxsize },
283 { "header_maxsize", opt_int, &header_maxsize },
284 { "headers_charset", opt_stringptr, &headers_charset },
285 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
286 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
287 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
288 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
289 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
290 { "hold_domains", opt_stringptr, &hold_domains },
291 { "host_lookup", opt_stringptr, &host_lookup },
292 { "host_lookup_order", opt_stringptr, &host_lookup_order },
293 { "host_reject_connection", opt_stringptr, &host_reject_connection },
294 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
295 #ifdef SUPPORT_PROXY
296 { "hosts_proxy", opt_stringptr, &hosts_proxy },
297 #endif
298 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
299 #ifdef LOOKUP_IBASE
300 { "ibase_servers", opt_stringptr, &ibase_servers },
301 #endif
302 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
303 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
304 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
305 { "keep_environment", opt_stringptr, &keep_environment },
306 { "keep_malformed", opt_time, &keep_malformed },
307 #ifdef LOOKUP_LDAP
308 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
309 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
310 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
311 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
312 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
313 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
314 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
315 { "ldap_start_tls", opt_bool, &eldap_start_tls },
316 { "ldap_version", opt_int, &eldap_version },
317 #endif
318 { "local_from_check", opt_bool, &local_from_check },
319 { "local_from_prefix", opt_stringptr, &local_from_prefix },
320 { "local_from_suffix", opt_stringptr, &local_from_suffix },
321 { "local_interfaces", opt_stringptr, &local_interfaces },
322 { "local_scan_timeout", opt_time, &local_scan_timeout },
323 { "local_sender_retain", opt_bool, &local_sender_retain },
324 { "localhost_number", opt_stringptr, &host_number_string },
325 { "log_file_path", opt_stringptr, &log_file_path },
326 { "log_selector", opt_stringptr, &log_selector_string },
327 { "log_timezone", opt_bool, &log_timezone },
328 { "lookup_open_max", opt_int, &lookup_open_max },
329 { "max_username_length", opt_int, &max_username_length },
330 { "message_body_newlines", opt_bool, &message_body_newlines },
331 { "message_body_visible", opt_mkint, &message_body_visible },
332 { "message_id_header_domain", opt_stringptr, &message_id_domain },
333 { "message_id_header_text", opt_stringptr, &message_id_text },
334 { "message_logs", opt_bool, &message_logs },
335 { "message_size_limit", opt_stringptr, &message_size_limit },
336 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
337 { "move_frozen_messages", opt_bool, &move_frozen_messages },
338 #endif
339 { "mua_wrapper", opt_bool, &mua_wrapper },
340 #ifdef LOOKUP_MYSQL
341 { "mysql_servers", opt_stringptr, &mysql_servers },
342 #endif
343 { "never_users", opt_uidlist, &never_users },
344 #ifdef SUPPORT_TLS
345 { "openssl_options", opt_stringptr, &openssl_options },
346 #endif
347 #ifdef LOOKUP_ORACLE
348 { "oracle_servers", opt_stringptr, &oracle_servers },
349 #endif
350 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
351 #ifdef EXIM_PERL
352 { "perl_at_start", opt_bool, &opt_perl_at_start },
353 { "perl_startup", opt_stringptr, &opt_perl_startup },
354 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
355 #endif
356 #ifdef LOOKUP_PGSQL
357 { "pgsql_servers", opt_stringptr, &pgsql_servers },
358 #endif
359 { "pid_file_path", opt_stringptr, &pid_file_path },
360 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
361 #ifndef DISABLE_PRDR
362 { "prdr_enable", opt_bool, &prdr_enable },
363 #endif
364 { "preserve_message_logs", opt_bool, &preserve_message_logs },
365 { "primary_hostname", opt_stringptr, &primary_hostname },
366 { "print_topbitchars", opt_bool, &print_topbitchars },
367 { "process_log_path", opt_stringptr, &process_log_path },
368 { "prod_requires_admin", opt_bool, &prod_requires_admin },
369 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
370 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
371 { "queue_domains", opt_stringptr, &queue_domains },
372 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
373 { "queue_only", opt_bool, &queue_only },
374 { "queue_only_file", opt_stringptr, &queue_only_file },
375 { "queue_only_load", opt_fixed, &queue_only_load },
376 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
377 { "queue_only_override", opt_bool, &queue_only_override },
378 { "queue_run_in_order", opt_bool, &queue_run_in_order },
379 { "queue_run_max", opt_stringptr, &queue_run_max },
380 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
381 { "receive_timeout", opt_time, &receive_timeout },
382 { "received_header_text", opt_stringptr, &received_header_text },
383 { "received_headers_max", opt_int, &received_headers_max },
384 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
385 { "recipients_max", opt_int, &recipients_max },
386 { "recipients_max_reject", opt_bool, &recipients_max_reject },
387 #ifdef LOOKUP_REDIS
388 { "redis_servers", opt_stringptr, &redis_servers },
389 #endif
390 { "remote_max_parallel", opt_int, &remote_max_parallel },
391 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
392 { "retry_data_expire", opt_time, &retry_data_expire },
393 { "retry_interval_max", opt_time, &retry_interval_max },
394 { "return_path_remove", opt_bool, &return_path_remove },
395 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
396 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
397 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
398 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
399 { "slow_lookup_log", opt_int, &slow_lookup_log },
400 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
401 { "smtp_accept_max", opt_int, &smtp_accept_max },
402 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
403 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
404 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
405 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
406 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
407 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
408 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
409 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
410 { "smtp_banner", opt_stringptr, &smtp_banner },
411 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
412 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
413 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
414 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
415 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
416 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
417 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
418 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
419 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
420 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
421 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
422 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
423 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
424 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
425 #ifdef SUPPORT_I18N
426 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
427 #endif
428 #ifdef WITH_CONTENT_SCAN
429 { "spamd_address", opt_stringptr, &spamd_address },
430 #endif
431 #ifdef EXPERIMENTAL_SPF
432 { "spf_guess", opt_stringptr, &spf_guess },
433 #endif
434 { "split_spool_directory", opt_bool, &split_spool_directory },
435 { "spool_directory", opt_stringptr, &spool_directory },
436 { "spool_wireformat", opt_bool, &spool_wireformat },
437 #ifdef LOOKUP_SQLITE
438 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
439 #endif
440 #ifdef EXPERIMENTAL_SRS
441 { "srs_config", opt_stringptr, &srs_config },
442 { "srs_hashlength", opt_int, &srs_hashlength },
443 { "srs_hashmin", opt_int, &srs_hashmin },
444 { "srs_maxage", opt_int, &srs_maxage },
445 { "srs_secrets", opt_stringptr, &srs_secrets },
446 { "srs_usehash", opt_bool, &srs_usehash },
447 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
448 #endif
449 { "strict_acl_vars", opt_bool, &strict_acl_vars },
450 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
451 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
452 { "syslog_duplication", opt_bool, &syslog_duplication },
453 { "syslog_facility", opt_stringptr, &syslog_facility_str },
454 { "syslog_pid", opt_bool, &syslog_pid },
455 { "syslog_processname", opt_stringptr, &syslog_processname },
456 { "syslog_timestamp", opt_bool, &syslog_timestamp },
457 { "system_filter", opt_stringptr, &system_filter },
458 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
459 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
460 { "system_filter_group", opt_gid, &system_filter_gid },
461 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
462 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
463 { "system_filter_user", opt_uid, &system_filter_uid },
464 { "tcp_nodelay", opt_bool, &tcp_nodelay },
465 #ifdef USE_TCP_WRAPPERS
466 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
467 #endif
468 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
469 { "timezone", opt_stringptr, &timezone_string },
470 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
471 #ifdef SUPPORT_TLS
472 { "tls_certificate", opt_stringptr, &tls_certificate },
473 { "tls_crl", opt_stringptr, &tls_crl },
474 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
475 { "tls_dhparam", opt_stringptr, &tls_dhparam },
476 { "tls_eccurve", opt_stringptr, &tls_eccurve },
477 # ifndef DISABLE_OCSP
478 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
479 # endif
480 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
481 { "tls_privatekey", opt_stringptr, &tls_privatekey },
482 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
483 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
484 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
485 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
486 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
487 #endif
488 { "trusted_groups", opt_gidlist, &trusted_groups },
489 { "trusted_users", opt_uidlist, &trusted_users },
490 { "unknown_login", opt_stringptr, &unknown_login },
491 { "unknown_username", opt_stringptr, &unknown_username },
492 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
493 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
494 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
495 { "warn_message_file", opt_stringptr, &warn_message_file },
496 { "write_rejectlog", opt_bool, &write_rejectlog }
497 };
498
499 static int optionlist_config_size = nelem(optionlist_config);
500
501
502
503 /*************************************************
504 * Find the name of an option *
505 *************************************************/
506
507 /* This function is to aid debugging. Various functions take arguments that are
508 pointer variables in the options table or in option tables for various drivers.
509 For debugging output, it is useful to be able to find the name of the option
510 which is currently being processed. This function finds it, if it exists, by
511 searching the table(s).
512
513 Arguments: a value that is presumed to be in the table above
514 Returns: the option name, or an empty string
515 */
516
517 uschar *
518 readconf_find_option(void *p)
519 {
520 int i;
521 router_instance *r;
522 transport_instance *t;
523
524 for (i = 0; i < nelem(optionlist_config); i++)
525 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
526
527 for (r = routers; r; r = r->next)
528 {
529 router_info *ri = r->info;
530 for (i = 0; i < *ri->options_count; i++)
531 {
532 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
533 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
534 return US ri->options[i].name;
535 }
536 }
537
538 for (t = transports; t; t = t->next)
539 {
540 transport_info *ti = t->info;
541 for (i = 0; i < *ti->options_count; i++)
542 {
543 optionlist * op = &ti->options[i];
544 if ((op->type & opt_mask) != opt_stringptr) continue;
545 if (p == ( op->type & opt_public
546 ? (char *)t
547 : (char *)t->options_block
548 )
549 + (long int)op->value)
550 return US op->name;
551 }
552 }
553
554 return US"";
555 }
556
557
558
559
560 /*************************************************
561 * Deal with an assignment to a macro *
562 *************************************************/
563
564 /* We have a new definition. The macro_item structure includes a final vector
565 called "name" which is one byte long. Thus, adding "namelen" gives us enough
566 room to store the "name" string.
567 If a builtin macro we place at head of list, else tail. This lets us lazy-create
568 builtins. */
569
570 macro_item *
571 macro_create(const uschar * name, const uschar * val,
572 BOOL command_line, BOOL builtin)
573 {
574 unsigned namelen = Ustrlen(name);
575 macro_item * m = store_get(sizeof(macro_item) + namelen);
576
577 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val) */
578 if (!macros)
579 {
580 macros = m;
581 mlast = m;
582 m->next = NULL;
583 }
584 else if (builtin)
585 {
586 m->next = macros;
587 macros = m;
588 }
589 else
590 {
591 mlast->next = m;
592 mlast = m;
593 m->next = NULL;
594 }
595 m->command_line = command_line;
596 m->namelen = namelen;
597 m->replacement = string_copy(val);
598 Ustrcpy(m->name, name);
599 return m;
600 }
601
602
603 /* This function is called when a line that starts with an upper case letter is
604 encountered. The argument "line" should contain a complete logical line, and
605 start with the first letter of the macro name. The macro name and the
606 replacement text are extracted and stored. Redefinition of existing,
607 non-command line, macros is permitted using '==' instead of '='.
608
609 Arguments:
610 s points to the start of the logical line
611
612 Returns: nothing
613 */
614
615 static void
616 read_macro_assignment(uschar *s)
617 {
618 uschar name[64];
619 int namelen = 0;
620 BOOL redef = FALSE;
621 macro_item *m;
622
623 while (isalnum(*s) || *s == '_')
624 {
625 if (namelen >= sizeof(name) - 1)
626 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
627 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
628 name[namelen++] = *s++;
629 }
630 name[namelen] = 0;
631
632 while (isspace(*s)) s++;
633 if (*s++ != '=')
634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
635
636 if (*s == '=')
637 {
638 redef = TRUE;
639 s++;
640 }
641 while (isspace(*s)) s++;
642
643 /* If an existing macro of the same name was defined on the command line, we
644 just skip this definition. It's an error to attempt to redefine a macro without
645 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
646 It is also an error to define a macro whose name begins with the name of a
647 previously defined macro. This is the requirement that make using a tree
648 for macros hard; we must check all macros for the substring. Perhaps a
649 sorted list, and a bsearch, would work?
650 Note: it is documented that the other way round works. */
651
652 for (m = macros; m; m = m->next)
653 {
654 if (Ustrcmp(m->name, name) == 0)
655 {
656 if (!m->command_line && !redef)
657 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
658 "defined (use \"==\" if you want to redefine it", name);
659 break;
660 }
661
662 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
663 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
664 "a macro because previously defined macro \"%s\" is a substring",
665 name, m->name);
666
667 /* We cannot have this test, because it is documented that a substring
668 macro is permitted (there is even an example).
669 *
670 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
671 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
672 * "a macro because it is a substring of previously defined macro \"%s\"",
673 * name, m->name);
674 */
675 }
676
677 /* Check for an overriding command-line definition. */
678
679 if (m && m->command_line) return;
680
681 /* Redefinition must refer to an existing macro. */
682
683 if (redef)
684 if (m)
685 m->replacement = string_copy(s);
686 else
687 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
688 "\"%s\"", name);
689
690 /* We have a new definition. */
691 else
692 (void) macro_create(name, s, FALSE, FALSE);
693 }
694
695
696
697
698
699 /*************************************************/
700 /* Create compile-time feature macros */
701 static void
702 readconf_features(void)
703 {
704 /* Probably we could work out a static initialiser for wherever
705 macros are stored, but this will do for now. Some names are awkward
706 due to conflicts with other common macros. */
707
708 #ifdef SUPPORT_CRYPTEQ
709 macro_create(US"_HAVE_CRYPTEQ", US"y", FALSE, TRUE);
710 #endif
711 #if HAVE_ICONV
712 macro_create(US"_HAVE_ICONV", US"y", FALSE, TRUE);
713 #endif
714 #if HAVE_IPV6
715 macro_create(US"_HAVE_IPV6", US"y", FALSE, TRUE);
716 #endif
717 #ifdef HAVE_SETCLASSRESOURCES
718 macro_create(US"_HAVE_SETCLASSRESOURCES", US"y", FALSE, TRUE);
719 #endif
720 #ifdef SUPPORT_PAM
721 macro_create(US"_HAVE_PAM", US"y", FALSE, TRUE);
722 #endif
723 #ifdef EXIM_PERL
724 macro_create(US"_HAVE_PERL", US"y", FALSE, TRUE);
725 #endif
726 #ifdef EXPAND_DLFUNC
727 macro_create(US"_HAVE_DLFUNC", US"y", FALSE, TRUE);
728 #endif
729 #ifdef USE_TCP_WRAPPERS
730 macro_create(US"_HAVE_TCPWRAPPERS", US"y", FALSE, TRUE);
731 #endif
732 #ifdef SUPPORT_TLS
733 macro_create(US"_HAVE_TLS", US"y", FALSE, TRUE);
734 # ifdef USE_GNUTLS
735 macro_create(US"_HAVE_GNUTLS", US"y", FALSE, TRUE);
736 # else
737 macro_create(US"_HAVE_OPENSSL", US"y", FALSE, TRUE);
738 # endif
739 #endif
740 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
741 macro_create(US"_HAVE_TRANSLATE_IP_ADDRESS", US"y", FALSE, TRUE);
742 #endif
743 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
744 macro_create(US"_HAVE_MOVE_FROZEN_MESSAGES", US"y", FALSE, TRUE);
745 #endif
746 #ifdef WITH_CONTENT_SCAN
747 macro_create(US"_HAVE_CONTENT_SCANNING", US"y", FALSE, TRUE);
748 #endif
749 #ifndef DISABLE_DKIM
750 macro_create(US"_HAVE_DKIM", US"y", FALSE, TRUE);
751 #endif
752 #ifndef DISABLE_DNSSEC
753 macro_create(US"_HAVE_DNSSEC", US"y", FALSE, TRUE);
754 #endif
755 #ifndef DISABLE_EVENT
756 macro_create(US"_HAVE_EVENT", US"y", FALSE, TRUE);
757 #endif
758 #ifdef SUPPORT_I18N
759 macro_create(US"_HAVE_I18N", US"y", FALSE, TRUE);
760 #endif
761 #ifndef DISABLE_OCSP
762 macro_create(US"_HAVE_OCSP", US"y", FALSE, TRUE);
763 #endif
764 #ifndef DISABLE_PRDR
765 macro_create(US"_HAVE_PRDR", US"y", FALSE, TRUE);
766 #endif
767 #ifdef SUPPORT_PROXY
768 macro_create(US"_HAVE_PROXY", US"y", FALSE, TRUE);
769 #endif
770 #ifdef SUPPORT_SOCKS
771 macro_create(US"_HAVE_SOCKS", US"y", FALSE, TRUE);
772 #endif
773 #ifdef TCP_FASTOPEN
774 macro_create(US"_HAVE_TCP_FASTOPEN", US"y", FALSE, TRUE);
775 #endif
776 #ifdef EXPERIMENTAL_LMDB
777 macro_create(US"_HAVE_LMDB", US"y", FALSE, TRUE);
778 #endif
779 #ifdef EXPERIMENTAL_SPF
780 macro_create(US"_HAVE_SPF", US"y", FALSE, TRUE);
781 #endif
782 #ifdef EXPERIMENTAL_SRS
783 macro_create(US"_HAVE_SRS", US"y", FALSE, TRUE);
784 #endif
785 #ifdef EXPERIMENTAL_BRIGHTMAIL
786 macro_create(US"_HAVE_BRIGHTMAIL", US"y", FALSE, TRUE);
787 #endif
788 #ifdef EXPERIMENTAL_DANE
789 macro_create(US"_HAVE_DANE", US"y", FALSE, TRUE);
790 #endif
791 #ifdef EXPERIMENTAL_DCC
792 macro_create(US"_HAVE_DCC", US"y", FALSE, TRUE);
793 #endif
794 #ifdef EXPERIMENTAL_DMARC
795 macro_create(US"_HAVE_DMARC", US"y", FALSE, TRUE);
796 #endif
797 #ifdef EXPERIMENTAL_DSN_INFO
798 macro_create(US"_HAVE_DSN_INFO", US"y", FALSE, TRUE);
799 #endif
800
801 #ifdef LOOKUP_LSEARCH
802 macro_create(US"_HAVE_LOOKUP_LSEARCH", US"y", FALSE, TRUE);
803 #endif
804 #ifdef LOOKUP_CDB
805 macro_create(US"_HAVE_LOOKUP_CDB", US"y", FALSE, TRUE);
806 #endif
807 #ifdef LOOKUP_DBM
808 macro_create(US"_HAVE_LOOKUP_DBM", US"y", FALSE, TRUE);
809 #endif
810 #ifdef LOOKUP_DNSDB
811 macro_create(US"_HAVE_LOOKUP_DNSDB", US"y", FALSE, TRUE);
812 #endif
813 #ifdef LOOKUP_DSEARCH
814 macro_create(US"_HAVE_LOOKUP_DSEARCH", US"y", FALSE, TRUE);
815 #endif
816 #ifdef LOOKUP_IBASE
817 macro_create(US"_HAVE_LOOKUP_IBASE", US"y", FALSE, TRUE);
818 #endif
819 #ifdef LOOKUP_LDAP
820 macro_create(US"_HAVE_LOOKUP_LDAP", US"y", FALSE, TRUE);
821 #endif
822 #ifdef EXPERIMENTAL_LMDB
823 macro_create(US"_HAVE_LOOKUP_LMDB", US"y", FALSE, TRUE);
824 #endif
825 #ifdef LOOKUP_MYSQL
826 macro_create(US"_HAVE_LOOKUP_MYSQL", US"y", FALSE, TRUE);
827 #endif
828 #ifdef LOOKUP_NIS
829 macro_create(US"_HAVE_LOOKUP_NIS", US"y", FALSE, TRUE);
830 #endif
831 #ifdef LOOKUP_NISPLUS
832 macro_create(US"_HAVE_LOOKUP_NISPLUS", US"y", FALSE, TRUE);
833 #endif
834 #ifdef LOOKUP_ORACLE
835 macro_create(US"_HAVE_LOOKUP_ORACLE", US"y", FALSE, TRUE);
836 #endif
837 #ifdef LOOKUP_PASSWD
838 macro_create(US"_HAVE_LOOKUP_PASSWD", US"y", FALSE, TRUE);
839 #endif
840 #ifdef LOOKUP_PGSQL
841 macro_create(US"_HAVE_LOOKUP_PGSQL", US"y", FALSE, TRUE);
842 #endif
843 #ifdef LOOKUP_REDIS
844 macro_create(US"_HAVE_LOOKUP_REDIS", US"y", FALSE, TRUE);
845 #endif
846 #ifdef LOOKUP_SQLITE
847 macro_create(US"_HAVE_LOOKUP_SQLITE", US"y", FALSE, TRUE);
848 #endif
849 #ifdef LOOKUP_TESTDB
850 macro_create(US"_HAVE_LOOKUP_TESTDB", US"y", FALSE, TRUE);
851 #endif
852 #ifdef LOOKUP_WHOSON
853 macro_create(US"_HAVE_LOOKUP_WHOSON", US"y", FALSE, TRUE);
854 #endif
855
856 #ifdef TRANSPORT_APPENDFILE
857 # ifdef SUPPORT_MAILDIR
858 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILDIR", US"y", FALSE, TRUE);
859 # endif
860 # ifdef SUPPORT_MAILSTORE
861 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILSTORE", US"y", FALSE, TRUE);
862 # endif
863 # ifdef SUPPORT_MBX
864 macro_create(US"_HAVE_TRANSPORT_APPEND_MBX", US"y", FALSE, TRUE);
865 # endif
866 #endif
867 }
868
869
870 void
871 readconf_options_from_list(optionlist * opts, unsigned nopt, const uschar * section, uschar * group)
872 {
873 int i;
874 const uschar * s;
875
876 /* The 'previously-defined-substring' rule for macros in config file
877 lines is done so for these builtin macros: we know that the table
878 we source from is in strict alpha order, hence the builtins portion
879 of the macros list is in reverse-alpha (we prepend them) - so longer
880 macros that have substrings are always discovered first during
881 expansion. */
882
883 for (i = 0; i < nopt; i++) if (*(s = US opts[i].name) && *s != '*')
884 if (group)
885 macro_create(string_sprintf("_OPT_%T_%T_%T", section, group, s), US"y", FALSE, TRUE);
886 else
887 macro_create(string_sprintf("_OPT_%T_%T", section, s), US"y", FALSE, TRUE);
888 }
889
890
891 static void
892 readconf_options(void)
893 {
894 readconf_options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
895 readconf_options_routers();
896 readconf_options_transports();
897 readconf_options_auths();
898 }
899
900 static void
901 macros_create_builtin(void)
902 {
903 readconf_features();
904 readconf_options();
905 macros_builtin_created = TRUE;
906 }
907
908
909 /*************************************************
910 * Read configuration line *
911 *************************************************/
912
913 /* A logical line of text is read from the configuration file into the big
914 buffer, taking account of macros, .includes, and continuations. The size of
915 big_buffer is increased if necessary. The count of configuration lines is
916 maintained. Physical input lines starting with # (ignoring leading white space,
917 and after macro replacement) and empty logical lines are always ignored.
918 Leading and trailing spaces are removed.
919
920 If we hit a line of the form "begin xxxx", the xxxx is placed in the
921 next_section vector, and the function returns NULL, indicating the end of a
922 configuration section. On end-of-file, NULL is returned with next_section
923 empty.
924
925 Arguments: none
926
927 Returns: a pointer to the first non-blank in the line,
928 or NULL if eof or end of section is reached
929 */
930
931 static uschar *
932 get_config_line(void)
933 {
934 int startoffset = 0; /* To first non-blank char in logical line */
935 int len = 0; /* Of logical line so far */
936 int newlen;
937 uschar *s, *ss;
938 macro_item *m;
939 BOOL macro_found;
940
941 /* Loop for handling continuation lines, skipping comments, and dealing with
942 .include files. */
943
944 for (;;)
945 {
946 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
947 {
948 if (config_file_stack != NULL) /* EOF inside .include */
949 {
950 (void)fclose(config_file);
951 config_file = config_file_stack->file;
952 config_filename = config_file_stack->filename;
953 config_directory = config_file_stack->directory;
954 config_lineno = config_file_stack->lineno;
955 config_file_stack = config_file_stack->next;
956 if (config_lines)
957 save_config_position(config_filename, config_lineno);
958 continue;
959 }
960
961 /* EOF at top level */
962
963 if (cstate_stack_ptr >= 0)
964 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
965 "Unexpected end of configuration file: .endif missing");
966
967 if (len != 0) break; /* EOF after continuation */
968 next_section[0] = 0; /* EOF at start of logical line */
969 return NULL;
970 }
971
972 config_lineno++;
973 newlen = len + Ustrlen(big_buffer + len);
974
975 if (config_lines && config_lineno == 1)
976 save_config_position(config_filename, config_lineno);
977
978 /* Handle pathologically long physical lines - yes, it did happen - by
979 extending big_buffer at this point. The code also copes with very long
980 logical lines. */
981
982 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
983 {
984 uschar *newbuffer;
985 big_buffer_size += BIG_BUFFER_SIZE;
986 newbuffer = store_malloc(big_buffer_size);
987
988 /* This use of strcpy is OK because we know that the string in the old
989 buffer is shorter than the new buffer. */
990
991 Ustrcpy(newbuffer, big_buffer);
992 store_free(big_buffer);
993 big_buffer = newbuffer;
994 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
995 break;
996 newlen += Ustrlen(big_buffer + newlen);
997 }
998
999 /* Find the true start of the physical line - leading spaces are always
1000 ignored. */
1001
1002 ss = big_buffer + len;
1003 while (isspace(*ss)) ss++;
1004
1005 /* Process the physical line for macros. If this is the start of the logical
1006 line, skip over initial text at the start of the line if it starts with an
1007 upper case character followed by a sequence of name characters and an equals
1008 sign, because that is the definition of a new macro, and we don't do
1009 replacement therein. */
1010
1011 s = ss;
1012 if (len == 0 && isupper(*s))
1013 {
1014 while (isalnum(*s) || *s == '_') s++;
1015 while (isspace(*s)) s++;
1016 if (*s != '=') s = ss; /* Not a macro definition */
1017 }
1018
1019 /* If the builtin macros are not yet defined, and the line contains an
1020 underscrore followed by an one of the three possible chars used by
1021 builtins, create them. */
1022
1023 if (!macros_builtin_created)
1024 {
1025 const uschar * t, * p;
1026 uschar c;
1027 for (t = s; (p = CUstrchr(t, '_')); t = p+1)
1028 if (c = p[1], c == 'O' || c == 'D' || c == 'H')
1029 {
1030 /* fprintf(stderr, "%s: builtins create triggered by '%s'\n", __FUNCTION__, s); */
1031 builtin_macros_create_trigger = string_copy(s);
1032 macros_create_builtin();
1033 break;
1034 }
1035 }
1036
1037 /* For each defined macro, scan the line (from after XXX= if present),
1038 replacing all occurrences of the macro. */
1039
1040 macro_found = FALSE;
1041 for (m = macros; m; m = m->next)
1042 {
1043 uschar *p, *pp;
1044 uschar *t = s;
1045
1046 while ((p = Ustrstr(t, m->name)) != NULL)
1047 {
1048 int moveby;
1049 int replen = Ustrlen(m->replacement);
1050
1051 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, t) */
1052 /* Expand the buffer if necessary */
1053
1054 while (newlen - m->namelen + replen + 1 > big_buffer_size)
1055 {
1056 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
1057 uschar *newbuffer = store_malloc(newsize);
1058 memcpy(newbuffer, big_buffer, newlen + 1);
1059 p = newbuffer + (p - big_buffer);
1060 s = newbuffer + (s - big_buffer);
1061 ss = newbuffer + (ss - big_buffer);
1062 t = newbuffer + (t - big_buffer);
1063 big_buffer_size = newsize;
1064 store_free(big_buffer);
1065 big_buffer = newbuffer;
1066 }
1067
1068 /* Shuffle the remaining characters up or down in the buffer before
1069 copying in the replacement text. Don't rescan the replacement for this
1070 same macro. */
1071
1072 pp = p + m->namelen;
1073 if ((moveby = replen - m->namelen) != 0)
1074 {
1075 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
1076 newlen += moveby;
1077 }
1078 Ustrncpy(p, m->replacement, replen);
1079 t = p + replen;
1080 macro_found = TRUE;
1081 }
1082 }
1083
1084 /* An empty macro replacement at the start of a line could mean that ss no
1085 longer points to the first non-blank character. */
1086
1087 while (isspace(*ss)) ss++;
1088
1089 /* Check for comment lines - these are physical lines. */
1090
1091 if (*ss == '#') continue;
1092
1093 /* Handle conditionals, which are also applied to physical lines. Conditions
1094 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1095 expansion occured on the rest of the line. A preliminary test for the leading
1096 '.' saves effort on most lines. */
1097
1098 if (*ss == '.')
1099 {
1100 int i;
1101
1102 /* Search the list of conditional directives */
1103
1104 for (i = 0; i < cond_list_size; i++)
1105 {
1106 int n;
1107 cond_item *c = cond_list+i;
1108 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1109
1110 /* The following character must be white space or end of string */
1111
1112 n = ss[1 + c->namelen];
1113 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1114
1115 /* .ifdef and .ifndef push the current state onto the stack, then set
1116 a new one from the table. Stack overflow is an error */
1117
1118 if (c->pushpop > 0)
1119 {
1120 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1122 ".%s nested too deeply", c->name);
1123 cstate_stack[++cstate_stack_ptr] = cstate;
1124 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1125 }
1126
1127 /* For any of the others, stack underflow is an error. The next state
1128 comes either from the stack (.endif) or from the table. */
1129
1130 else
1131 {
1132 if (cstate_stack_ptr < 0)
1133 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1134 ".%s without matching .ifdef", c->name);
1135 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1136 next_cstate[cstate][macro_found? c->action1 : c->action2];
1137 }
1138
1139 /* Having dealt with a directive, break the loop */
1140
1141 break;
1142 }
1143
1144 /* If we have handled a conditional directive, continue with the next
1145 physical line. Otherwise, fall through. */
1146
1147 if (i < cond_list_size) continue;
1148 }
1149
1150 /* If the conditional state is not 0 (actively using these lines), ignore
1151 this input line. */
1152
1153 if (cstate != 0) continue; /* Conditional skip */
1154
1155 /* Handle .include lines - these are also physical lines. */
1156
1157 if (Ustrncmp(ss, ".include", 8) == 0 &&
1158 (isspace(ss[8]) ||
1159 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1160 {
1161 uschar *t;
1162 int include_if_exists = isspace(ss[8])? 0 : 10;
1163 config_file_item *save;
1164 struct stat statbuf;
1165
1166 ss += 9 + include_if_exists;
1167 while (isspace(*ss)) ss++;
1168 t = ss + Ustrlen(ss);
1169 while (t > ss && isspace(t[-1])) t--;
1170 if (*ss == '\"' && t[-1] == '\"')
1171 {
1172 ss++;
1173 t--;
1174 }
1175 *t = 0;
1176
1177 /* We allow relative file names. For security reasons currently
1178 relative names not allowed with .include_if_exists. For .include_if_exists
1179 we need to check the permissions/ownership of the containing folder */
1180 if (*ss != '/')
1181 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1182 "absolute path \"%s\"", ss);
1183 else
1184 {
1185 int offset = 0;
1186 int size = 0;
1187 ss = string_append(NULL, &size, &offset, 3, config_directory, "/", ss);
1188 ss[offset] = '\0'; /* string_append() does not zero terminate the string! */
1189 }
1190
1191 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1192
1193 if (config_lines)
1194 save_config_position(config_filename, config_lineno);
1195 save = store_get(sizeof(config_file_item));
1196 save->next = config_file_stack;
1197 config_file_stack = save;
1198 save->file = config_file;
1199 save->filename = config_filename;
1200 save->directory = config_directory;
1201 save->lineno = config_lineno;
1202
1203 if (!(config_file = Ufopen(ss, "rb")))
1204 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1205 "configuration file %s", ss);
1206
1207 config_filename = string_copy(ss);
1208 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1209 config_lineno = 0;
1210 continue;
1211 }
1212
1213 /* If this is the start of the logical line, remember where the non-blank
1214 data starts. Otherwise shuffle down continuation lines to remove leading
1215 white space. */
1216
1217 if (len == 0)
1218 startoffset = ss - big_buffer;
1219 else
1220 {
1221 s = big_buffer + len;
1222 if (ss > s)
1223 {
1224 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1225 newlen -= ss - s;
1226 }
1227 }
1228
1229 /* Accept the new addition to the line. Remove trailing white space. */
1230
1231 len = newlen;
1232 while (len > 0 && isspace(big_buffer[len-1])) len--;
1233 big_buffer[len] = 0;
1234
1235 /* We are done if the line does not end in backslash and contains some data.
1236 Empty logical lines are ignored. For continuations, remove the backslash and
1237 go round the loop to read the continuation line. */
1238
1239 if (len > 0)
1240 {
1241 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1242 big_buffer[--len] = 0; /* Remove backslash */
1243 }
1244 } /* Loop for reading multiple physical lines */
1245
1246 /* We now have a logical line. Test for the end of a configuration section (or,
1247 more accurately, for the start of the next section). Place the name of the next
1248 section in next_section, and return NULL. If the name given is longer than
1249 next_section, truncate it. It will be unrecognized later, because all the known
1250 section names do fit. Leave space for pluralizing. */
1251
1252 s = big_buffer + startoffset; /* First non-space character */
1253
1254 if (config_lines)
1255 save_config_line(s);
1256
1257 if (strncmpic(s, US"begin ", 6) == 0)
1258 {
1259 s += 6;
1260 while (isspace(*s)) s++;
1261 if (big_buffer + len - s > sizeof(next_section) - 2)
1262 s[sizeof(next_section) - 2] = 0;
1263 Ustrcpy(next_section, s);
1264 return NULL;
1265 }
1266
1267 /* Return the first non-blank character. */
1268
1269 return s;
1270 }
1271
1272
1273
1274 /*************************************************
1275 * Read a name *
1276 *************************************************/
1277
1278 /* The yield is the pointer to the next uschar. Names longer than the
1279 output space are silently truncated. This function is also used from acl.c when
1280 parsing ACLs.
1281
1282 Arguments:
1283 name where to put the name
1284 len length of name
1285 s input pointer
1286
1287 Returns: new input pointer
1288 */
1289
1290 uschar *
1291 readconf_readname(uschar *name, int len, uschar *s)
1292 {
1293 int p = 0;
1294 while (isspace(*s)) s++;
1295 if (isalpha(*s))
1296 {
1297 while (isalnum(*s) || *s == '_')
1298 {
1299 if (p < len-1) name[p++] = *s;
1300 s++;
1301 }
1302 }
1303 name[p] = 0;
1304 while (isspace(*s)) s++;
1305 return s;
1306 }
1307
1308
1309
1310
1311 /*************************************************
1312 * Read a time value *
1313 *************************************************/
1314
1315 /* This function is also called from outside, to read argument
1316 time values. The format of a time value is:
1317
1318 [<n>w][<n>d][<n>h][<n>m][<n>s]
1319
1320 as long as at least one is present. If a format error is encountered,
1321 return a negative value. The value must be terminated by the given
1322 terminator.
1323
1324 Arguments:
1325 s input pointer
1326 terminator required terminating character
1327 return_msec if TRUE, allow fractional seconds and return milliseconds
1328
1329 Returns: the time value, or -1 on syntax error
1330 value is seconds if return_msec is FALSE
1331 value is milliseconds if return_msec is TRUE
1332 */
1333
1334 int
1335 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1336 {
1337 int yield = 0;
1338 for (;;)
1339 {
1340 int value, count;
1341 double fraction;
1342
1343 if (!isdigit(*s)) return -1;
1344 (void)sscanf(CCS s, "%d%n", &value, &count);
1345 s += count;
1346
1347 switch (*s)
1348 {
1349 case 'w': value *= 7;
1350 case 'd': value *= 24;
1351 case 'h': value *= 60;
1352 case 'm': value *= 60;
1353 case 's': s++;
1354 break;
1355
1356 case '.':
1357 if (!return_msec) return -1;
1358 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1359 s += count;
1360 if (*s++ != 's') return -1;
1361 yield += (int)(fraction * 1000.0);
1362 break;
1363
1364 default: return -1;
1365 }
1366
1367 if (return_msec) value *= 1000;
1368 yield += value;
1369 if (*s == terminator) return yield;
1370 }
1371 /* Control never reaches here. */
1372 }
1373
1374
1375
1376 /*************************************************
1377 * Read a fixed point value *
1378 *************************************************/
1379
1380 /* The value is returned *1000
1381
1382 Arguments:
1383 s input pointer
1384 terminator required terminator
1385
1386 Returns: the value, or -1 on error
1387 */
1388
1389 static int
1390 readconf_readfixed(const uschar *s, int terminator)
1391 {
1392 int yield = 0;
1393 int value, count;
1394 if (!isdigit(*s)) return -1;
1395 (void)sscanf(CS s, "%d%n", &value, &count);
1396 s += count;
1397 yield = value * 1000;
1398 if (*s == '.')
1399 {
1400 int m = 100;
1401 while (isdigit((*(++s))))
1402 {
1403 yield += (*s - '0') * m;
1404 m /= 10;
1405 }
1406 }
1407
1408 return (*s == terminator)? yield : (-1);
1409 }
1410
1411
1412
1413 /*************************************************
1414 * Find option in list *
1415 *************************************************/
1416
1417 /* The lists are always in order, so binary chop can be used.
1418
1419 Arguments:
1420 name the option name to search for
1421 ol the first entry in the option list
1422 last one more than the offset of the last entry in the option list
1423
1424 Returns: pointer to an option entry, or NULL if not found
1425 */
1426
1427 static optionlist *
1428 find_option(uschar *name, optionlist *ol, int last)
1429 {
1430 int first = 0;
1431 while (last > first)
1432 {
1433 int middle = (first + last)/2;
1434 int c = Ustrcmp(name, ol[middle].name);
1435
1436 if (c == 0) return ol + middle;
1437 else if (c > 0) first = middle + 1;
1438 else last = middle;
1439 }
1440 return NULL;
1441 }
1442
1443
1444
1445 /*************************************************
1446 * Find a set flag in option list *
1447 *************************************************/
1448
1449 /* Because some versions of Unix make no restrictions on the values of uids and
1450 gids (even negative ones), we cannot represent "unset" by a special value.
1451 There is therefore a separate boolean variable for each one indicating whether
1452 a value is set or not. This function returns a pointer to the boolean, given
1453 the original option name. It is a major disaster if the flag cannot be found.
1454
1455 Arguments:
1456 name the name of the uid or gid option
1457 oltop points to the start of the relevant option list
1458 last one more than the offset of the last item in the option list
1459 data_block NULL when reading main options => data values in the option
1460 list are absolute addresses; otherwise they are byte offsets
1461 in data_block (used for driver options)
1462
1463 Returns: a pointer to the boolean flag.
1464 */
1465
1466 static BOOL *
1467 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1468 {
1469 optionlist *ol;
1470 uschar name2[64];
1471 sprintf(CS name2, "*set_%.50s", name);
1472 ol = find_option(name2, oltop, last);
1473 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1474 "Exim internal error: missing set flag for %s", name);
1475 return (data_block == NULL)? (BOOL *)(ol->value) :
1476 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1477 }
1478
1479
1480
1481
1482 /*************************************************
1483 * Output extra characters message and die *
1484 *************************************************/
1485
1486 /* Called when an option line has junk on the end. Sometimes this is because
1487 the sysadmin thinks comments are permitted.
1488
1489 Arguments:
1490 s points to the extra characters
1491 t1..t3 strings to insert in the log message
1492
1493 Returns: doesn't return; dies
1494 */
1495
1496 static void
1497 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1498 {
1499 uschar *comment = US"";
1500 if (*s == '#') comment = US" (# is comment only at line start)";
1501 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1502 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1503 }
1504
1505
1506
1507 /*************************************************
1508 * Read rewrite information *
1509 *************************************************/
1510
1511 /* Each line of rewrite information contains:
1512
1513 . A complete address in the form user@domain, possibly with
1514 leading * for each part; or alternatively, a regex.
1515
1516 . A replacement string (which will be expanded).
1517
1518 . An optional sequence of one-letter flags, indicating which
1519 headers etc. to apply this rule to.
1520
1521 All this is decoded and placed into a control block. The OR of the flags is
1522 maintained in a common word.
1523
1524 Arguments:
1525 p points to the string that makes up the rule
1526 existflags points to the overall flag word
1527 isglobal TRUE if reading global rewrite rules
1528
1529 Returns: the control block for the parsed rule.
1530 */
1531
1532 static rewrite_rule *
1533 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1534 {
1535 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1536
1537 next->next = NULL;
1538 next->key = string_dequote(&p);
1539
1540 while (isspace(*p)) p++;
1541 if (*p == 0)
1542 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1543 "missing rewrite replacement string");
1544
1545 next->flags = 0;
1546 next->replacement = string_dequote(&p);
1547
1548 while (*p != 0) switch (*p++)
1549 {
1550 case ' ': case '\t': break;
1551
1552 case 'q': next->flags |= rewrite_quit; break;
1553 case 'w': next->flags |= rewrite_whole; break;
1554
1555 case 'h': next->flags |= rewrite_all_headers; break;
1556 case 's': next->flags |= rewrite_sender; break;
1557 case 'f': next->flags |= rewrite_from; break;
1558 case 't': next->flags |= rewrite_to; break;
1559 case 'c': next->flags |= rewrite_cc; break;
1560 case 'b': next->flags |= rewrite_bcc; break;
1561 case 'r': next->flags |= rewrite_replyto; break;
1562
1563 case 'E': next->flags |= rewrite_all_envelope; break;
1564 case 'F': next->flags |= rewrite_envfrom; break;
1565 case 'T': next->flags |= rewrite_envto; break;
1566
1567 case 'Q': next->flags |= rewrite_qualify; break;
1568 case 'R': next->flags |= rewrite_repeat; break;
1569
1570 case 'S':
1571 next->flags |= rewrite_smtp;
1572 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1573 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1574 "rewrite rule has the S flag but is not a regular expression");
1575 break;
1576
1577 default:
1578 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1579 "unknown rewrite flag character '%c' "
1580 "(could be missing quotes round replacement item)", p[-1]);
1581 break;
1582 }
1583
1584 /* If no action flags are set, set all the "normal" rewrites. */
1585
1586 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1587 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1588
1589 /* Remember which exist, for optimization, and return the rule */
1590
1591 *existflags |= next->flags;
1592 return next;
1593 }
1594
1595
1596
1597
1598 /*************************************************
1599 * Read global rewrite information *
1600 *************************************************/
1601
1602 /* Each line is a single rewrite rule; it is parsed into a control block
1603 by readconf_one_rewrite(), and its flags are ORed into the global flag
1604 word rewrite_existflags. */
1605
1606 void
1607 readconf_rewrites(void)
1608 {
1609 rewrite_rule **chain = &global_rewrite_rules;
1610 uschar *p;
1611
1612 while ((p = get_config_line()) != NULL)
1613 {
1614 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1615 *chain = next;
1616 chain = &(next->next);
1617 }
1618 }
1619
1620
1621
1622 /*************************************************
1623 * Read a string *
1624 *************************************************/
1625
1626 /* Strings are read into the normal store pool. As long we aren't too
1627 near the end of the current block, the string will just use what is necessary
1628 on the top of the stacking pool, because string_cat() uses the extension
1629 mechanism.
1630
1631 Argument:
1632 s the rest of the input line
1633 name the option name (for errors)
1634
1635 Returns: pointer to the string
1636 */
1637
1638 static uschar *
1639 read_string(const uschar *s, const uschar *name)
1640 {
1641 uschar *yield;
1642 const uschar *ss;
1643
1644 if (*s != '\"') return string_copy(s);
1645
1646 ss = s;
1647 yield = string_dequote(&s);
1648
1649 if (s == ss+1 || s[-1] != '\"')
1650 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1651 "missing quote at end of string value for %s", name);
1652
1653 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1654
1655 return yield;
1656 }
1657
1658
1659 /*************************************************
1660 * Custom-handler options *
1661 *************************************************/
1662 static void
1663 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1664 {
1665 if (*str == '$')
1666 smtp_receive_timeout_s = string_copy(str);
1667 else
1668 {
1669 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1670 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1671 if (smtp_receive_timeout < 0)
1672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1673 name);
1674 }
1675 }
1676
1677 /*************************************************
1678 * Handle option line *
1679 *************************************************/
1680
1681 /* This function is called from several places to process a line containing the
1682 setting of an option. The first argument is the line to be decoded; it has been
1683 checked not to be empty and not to start with '#'. Trailing newlines and white
1684 space have been removed. The second argument is a pointer to the list of
1685 variable names that are to be recognized, together with their types and
1686 locations, and the third argument gives the number of entries in the list.
1687
1688 The fourth argument is a pointer to a data block. If it is NULL, then the data
1689 values in the options list are absolute addresses. Otherwise, they are byte
1690 offsets in the data block.
1691
1692 String option data may continue onto several lines; this function reads further
1693 data from config_file if necessary.
1694
1695 The yield of this function is normally zero. If a string continues onto
1696 multiple lines, then the data value is permitted to be followed by a comma
1697 or a semicolon (for use in drivers) and the yield is that character.
1698
1699 Arguments:
1700 buffer contains the configuration line to be handled
1701 oltop points to the start of the relevant option list
1702 last one more than the offset of the last item in the option list
1703 data_block NULL when reading main options => data values in the option
1704 list are absolute addresses; otherwise they are byte offsets
1705 in data_block when they have opt_public set; otherwise
1706 they are byte offsets in data_block->options_block.
1707 unknown_txt format string to use in panic message for unknown option;
1708 must contain %s for option name
1709 if given as NULL, don't panic on unknown option
1710
1711 Returns: TRUE if an option was read successfully,
1712 FALSE false for an unknown option if unknown_txt == NULL,
1713 otherwise panic and die on an unknown option
1714 */
1715
1716 static BOOL
1717 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1718 void *data_block, uschar *unknown_txt)
1719 {
1720 int ptr = 0;
1721 int offset = 0;
1722 int n, count, type, value;
1723 int issecure = 0;
1724 uid_t uid;
1725 gid_t gid;
1726 BOOL boolvalue = TRUE;
1727 BOOL freesptr = TRUE;
1728 optionlist *ol, *ol2;
1729 struct passwd *pw;
1730 void *reset_point;
1731 int intbase = 0;
1732 uschar *inttype = US"";
1733 uschar *sptr;
1734 uschar *s = buffer;
1735 uschar **str_target;
1736 uschar name[64];
1737 uschar name2[64];
1738
1739 /* There may be leading spaces; thereafter, we expect an option name starting
1740 with a letter. */
1741
1742 while (isspace(*s)) s++;
1743 if (!isalpha(*s))
1744 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1745
1746 /* Read the name of the option, and skip any subsequent white space. If
1747 it turns out that what we read was "hide", set the flag indicating that
1748 this is a secure option, and loop to read the next word. */
1749
1750 for (n = 0; n < 2; n++)
1751 {
1752 while (isalnum(*s) || *s == '_')
1753 {
1754 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1755 s++;
1756 }
1757 name[ptr] = 0;
1758 while (isspace(*s)) s++;
1759 if (Ustrcmp(name, "hide") != 0) break;
1760 issecure = opt_secure;
1761 ptr = 0;
1762 }
1763
1764 /* Deal with "no_" or "not_" here for booleans */
1765
1766 if (Ustrncmp(name, "no_", 3) == 0)
1767 {
1768 boolvalue = FALSE;
1769 offset = 3;
1770 }
1771
1772 if (Ustrncmp(name, "not_", 4) == 0)
1773 {
1774 boolvalue = FALSE;
1775 offset = 4;
1776 }
1777
1778 /* Search the list for the given name. A non-existent name, or an option that
1779 is set twice, is a disaster. */
1780
1781 if (!(ol = find_option(name + offset, oltop, last)))
1782 {
1783 if (unknown_txt == NULL) return FALSE;
1784 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1785 }
1786
1787 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1788 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1789 "\"%s\" option set for the second time", name);
1790
1791 ol->type |= opt_set | issecure;
1792 type = ol->type & opt_mask;
1793
1794 /* Types with data values must be followed by '='; the "no[t]_" prefix
1795 applies only to boolean values. */
1796
1797 if (type < opt_bool || type > opt_bool_last)
1798 {
1799 if (offset != 0)
1800 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1801 "negation prefix applied to a non-boolean option");
1802 if (*s == 0)
1803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1804 "unexpected end of line (data missing) after %s", name);
1805 if (*s != '=')
1806 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1807 }
1808
1809 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1810 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1811 ultimately expands to one of those values. */
1812
1813 else if (*s != 0 && (offset != 0 || *s != '='))
1814 extra_chars_error(s, US"boolean option ", name, US"");
1815
1816 /* Skip white space after = */
1817
1818 if (*s == '=') while (isspace((*(++s))));
1819
1820 /* If there is a data block and the opt_public flag is not set, change
1821 the data block pointer to the private options block. */
1822
1823 if (data_block != NULL && (ol->type & opt_public) == 0)
1824 data_block = (void *)(((driver_instance *)data_block)->options_block);
1825
1826 /* Now get the data according to the type. */
1827
1828 switch (type)
1829 {
1830 /* If a string value is not enclosed in quotes, it consists of
1831 the rest of the current line, verbatim. Otherwise, string escapes
1832 are processed.
1833
1834 A transport is specified as a string, which is then looked up in the
1835 list of transports. A search type is specified as one of a number of
1836 known strings.
1837
1838 A set or rewrite rules for a driver is specified as a string, which is
1839 then parsed into a suitable chain of control blocks.
1840
1841 Uids and gids are specified as strings which are then looked up in the
1842 passwd file. Lists of uids and gids are similarly specified as colon-
1843 separated strings. */
1844
1845 case opt_stringptr:
1846 case opt_uid:
1847 case opt_gid:
1848 case opt_expand_uid:
1849 case opt_expand_gid:
1850 case opt_uidlist:
1851 case opt_gidlist:
1852 case opt_rewrite:
1853
1854 reset_point = sptr = read_string(s, name);
1855
1856 /* Having read a string, we now have several different ways of using it,
1857 depending on the data type, so do another switch. If keeping the actual
1858 string is not required (because it is interpreted), freesptr is set TRUE,
1859 and at the end we reset the pool. */
1860
1861 switch (type)
1862 {
1863 /* If this was a string, set the variable to point to the new string,
1864 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1865 rules, we still keep the string (for printing), and parse the rules into a
1866 control block and flags word. */
1867
1868 case opt_stringptr:
1869 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1870 : USS (ol->value);
1871 if (ol->type & opt_rep_con)
1872 {
1873 uschar * saved_condition;
1874 /* We already have a condition, we're conducting a crude hack to let
1875 multiple condition rules be chained together, despite storing them in
1876 text form. */
1877 *str_target = string_copy_malloc( (saved_condition = *str_target)
1878 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1879 saved_condition, sptr)
1880 : sptr);
1881 /* TODO(pdp): there is a memory leak here and just below
1882 when we set 3 or more conditions; I still don't
1883 understand the store mechanism enough to know
1884 what's the safe way to free content from an earlier store.
1885 AFAICT, stores stack, so freeing an early stored item also stores
1886 all data alloc'd after it. If we knew conditions were adjacent,
1887 we could survive that, but we don't. So I *think* we need to take
1888 another bit from opt_type to indicate "malloced"; this seems like
1889 quite a hack, especially for this one case. It also means that
1890 we can't ever reclaim the store from the *first* condition.
1891
1892 Because we only do this once, near process start-up, I'm prepared to
1893 let this slide for the time being, even though it rankles. */
1894 }
1895 else if (ol->type & opt_rep_str)
1896 {
1897 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1898 int sep_i = -(int)sep_o;
1899 const uschar * list = sptr;
1900 uschar * s;
1901 uschar * list_o = *str_target;
1902
1903 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1904 list_o = string_append_listele(list_o, sep_o, s);
1905 if (list_o)
1906 *str_target = string_copy_malloc(list_o);
1907 }
1908 else
1909 {
1910 *str_target = sptr;
1911 freesptr = FALSE;
1912 }
1913 break;
1914
1915 case opt_rewrite:
1916 if (data_block)
1917 *USS (US data_block + (long int)(ol->value)) = sptr;
1918 else
1919 *USS (ol->value) = sptr;
1920 freesptr = FALSE;
1921 if (type == opt_rewrite)
1922 {
1923 int sep = 0;
1924 int *flagptr;
1925 uschar *p = sptr;
1926 rewrite_rule **chain;
1927 optionlist *ol3;
1928
1929 sprintf(CS name2, "*%.50s_rules", name);
1930 ol2 = find_option(name2, oltop, last);
1931 sprintf(CS name2, "*%.50s_flags", name);
1932 ol3 = find_option(name2, oltop, last);
1933
1934 if (ol2 == NULL || ol3 == NULL)
1935 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1936 "rewrite rules not available for driver");
1937
1938 if (data_block == NULL)
1939 {
1940 chain = (rewrite_rule **)(ol2->value);
1941 flagptr = (int *)(ol3->value);
1942 }
1943 else
1944 {
1945 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1946 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1947 }
1948
1949 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1950 {
1951 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1952 *chain = next;
1953 chain = &(next->next);
1954 }
1955
1956 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1958 "non-header rewrite - not allowed at transport time -");
1959 }
1960 break;
1961
1962 /* If it was an expanded uid, see if there is any expansion to be
1963 done by checking for the presence of a $ character. If there is, save it
1964 in the corresponding *expand_user option field. Otherwise, fall through
1965 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1966 of data. */
1967
1968 case opt_expand_uid:
1969 sprintf(CS name2, "*expand_%.50s", name);
1970 ol2 = find_option(name2, oltop, last);
1971 if (ol2 != NULL)
1972 {
1973 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1974
1975 if (data_block == NULL)
1976 *((uschar **)(ol2->value)) = ss;
1977 else
1978 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1979
1980 if (ss != NULL)
1981 {
1982 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1983 freesptr = FALSE;
1984 break;
1985 }
1986 }
1987
1988 /* Look up a fixed uid, and also make use of the corresponding gid
1989 if a passwd entry is returned and the gid has not been set. */
1990
1991 case opt_uid:
1992 if (!route_finduser(sptr, &pw, &uid))
1993 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1994 if (data_block == NULL)
1995 *((uid_t *)(ol->value)) = uid;
1996 else
1997 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1998
1999 /* Set the flag indicating a fixed value is set */
2000
2001 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2002
2003 /* Handle matching gid if we have a passwd entry: done by finding the
2004 same name with terminating "user" changed to "group"; if not found,
2005 ignore. Also ignore if the value is already set. */
2006
2007 if (pw == NULL) break;
2008 Ustrcpy(name+Ustrlen(name)-4, "group");
2009 ol2 = find_option(name, oltop, last);
2010 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
2011 (ol2->type & opt_mask) == opt_expand_gid))
2012 {
2013 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
2014 if (! *set_flag)
2015 {
2016 if (data_block == NULL)
2017 *((gid_t *)(ol2->value)) = pw->pw_gid;
2018 else
2019 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
2020 *set_flag = TRUE;
2021 }
2022 }
2023 break;
2024
2025 /* If it was an expanded gid, see if there is any expansion to be
2026 done by checking for the presence of a $ character. If there is, save it
2027 in the corresponding *expand_user option field. Otherwise, fall through
2028 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
2029 of data. */
2030
2031 case opt_expand_gid:
2032 sprintf(CS name2, "*expand_%.50s", name);
2033 ol2 = find_option(name2, oltop, last);
2034 if (ol2 != NULL)
2035 {
2036 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
2037
2038 if (data_block == NULL)
2039 *((uschar **)(ol2->value)) = ss;
2040 else
2041 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
2042
2043 if (ss != NULL)
2044 {
2045 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2046 freesptr = FALSE;
2047 break;
2048 }
2049 }
2050
2051 /* Handle freestanding gid */
2052
2053 case opt_gid:
2054 if (!route_findgroup(sptr, &gid))
2055 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2056 if (data_block == NULL)
2057 *((gid_t *)(ol->value)) = gid;
2058 else
2059 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
2060 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2061 break;
2062
2063 /* If it was a uid list, look up each individual entry, and build
2064 a vector of uids, with a count in the first element. Put the vector
2065 in malloc store so we can free the string. (We are reading into
2066 permanent store already.) */
2067
2068 case opt_uidlist:
2069 {
2070 int count = 1;
2071 uid_t *list;
2072 int ptr = 0;
2073 const uschar *p;
2074 const uschar *op = expand_string (sptr);
2075
2076 if (op == NULL)
2077 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2078 name, expand_string_message);
2079
2080 p = op;
2081 if (*p != 0) count++;
2082 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2083 list = store_malloc(count*sizeof(uid_t));
2084 list[ptr++] = (uid_t)(count - 1);
2085
2086 if (data_block == NULL)
2087 *((uid_t **)(ol->value)) = list;
2088 else
2089 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2090
2091 p = op;
2092 while (count-- > 1)
2093 {
2094 int sep = 0;
2095 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2096 if (!route_finduser(big_buffer, NULL, &uid))
2097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2098 big_buffer);
2099 list[ptr++] = uid;
2100 }
2101 }
2102 break;
2103
2104 /* If it was a gid list, look up each individual entry, and build
2105 a vector of gids, with a count in the first element. Put the vector
2106 in malloc store so we can free the string. (We are reading into permanent
2107 store already.) */
2108
2109 case opt_gidlist:
2110 {
2111 int count = 1;
2112 gid_t *list;
2113 int ptr = 0;
2114 const uschar *p;
2115 const uschar *op = expand_string (sptr);
2116
2117 if (op == NULL)
2118 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2119 name, expand_string_message);
2120
2121 p = op;
2122 if (*p != 0) count++;
2123 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2124 list = store_malloc(count*sizeof(gid_t));
2125 list[ptr++] = (gid_t)(count - 1);
2126
2127 if (data_block == NULL)
2128 *((gid_t **)(ol->value)) = list;
2129 else
2130 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2131
2132 p = op;
2133 while (count-- > 1)
2134 {
2135 int sep = 0;
2136 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2137 if (!route_findgroup(big_buffer, &gid))
2138 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2139 big_buffer);
2140 list[ptr++] = gid;
2141 }
2142 }
2143 break;
2144 }
2145
2146 /* Release store if the value of the string doesn't need to be kept. */
2147
2148 if (freesptr) store_reset(reset_point);
2149 break;
2150
2151 /* Expanded boolean: if no characters follow, or if there are no dollar
2152 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2153 save the string for later expansion in the alternate place. */
2154
2155 case opt_expand_bool:
2156 if (*s != 0 && Ustrchr(s, '$') != 0)
2157 {
2158 sprintf(CS name2, "*expand_%.50s", name);
2159 ol2 = find_option(name2, oltop, last);
2160 if (ol2 != NULL)
2161 {
2162 reset_point = sptr = read_string(s, name);
2163 if (data_block == NULL)
2164 *((uschar **)(ol2->value)) = sptr;
2165 else
2166 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
2167 freesptr = FALSE;
2168 break;
2169 }
2170 }
2171 /* Fall through */
2172
2173 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2174 look for yes/not/true/false. Some booleans are stored in a single bit in
2175 a single int. There's a special fudge for verify settings; without a suffix
2176 they set both xx_sender and xx_recipient. The table points to the sender
2177 value; search subsequently for the recipient. There's another special case:
2178 opt_bool_set also notes when a boolean has been set. */
2179
2180 case opt_bool:
2181 case opt_bit:
2182 case opt_bool_verify:
2183 case opt_bool_set:
2184 if (*s != 0)
2185 {
2186 s = readconf_readname(name2, 64, s);
2187 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2188 boolvalue = TRUE;
2189 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2190 boolvalue = FALSE;
2191 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2192 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2193 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2194 US"for boolean option ", name);
2195 }
2196
2197 /* Handle single-bit type. */
2198
2199 if (type == opt_bit)
2200 {
2201 int bit = 1 << ((ol->type >> 16) & 31);
2202 int *ptr = (data_block == NULL)?
2203 (int *)(ol->value) :
2204 (int *)((uschar *)data_block + (long int)ol->value);
2205 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2206 break;
2207 }
2208
2209 /* Handle full BOOL types */
2210
2211 if (data_block == NULL)
2212 *((BOOL *)(ol->value)) = boolvalue;
2213 else
2214 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
2215
2216 /* Verify fudge */
2217
2218 if (type == opt_bool_verify)
2219 {
2220 sprintf(CS name2, "%.50s_recipient", name + offset);
2221 ol2 = find_option(name2, oltop, last);
2222 if (ol2 != NULL)
2223 {
2224 if (data_block == NULL)
2225 *((BOOL *)(ol2->value)) = boolvalue;
2226 else
2227 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
2228 }
2229 }
2230
2231 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2232
2233 else if (type == opt_bool_set)
2234 {
2235 sprintf(CS name2, "*set_%.50s", name + offset);
2236 ol2 = find_option(name2, oltop, last);
2237 if (ol2 != NULL)
2238 {
2239 if (data_block == NULL)
2240 *((BOOL *)(ol2->value)) = TRUE;
2241 else
2242 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
2243 }
2244 }
2245 break;
2246
2247 /* Octal integer */
2248
2249 case opt_octint:
2250 intbase = 8;
2251 inttype = US"octal ";
2252
2253 /* Integer: a simple(ish) case; allow octal and hex formats, and
2254 suffixes K, M and G. The different types affect output, not input. */
2255
2256 case opt_mkint:
2257 case opt_int:
2258 {
2259 uschar *endptr;
2260 long int lvalue;
2261
2262 errno = 0;
2263 lvalue = strtol(CS s, CSS &endptr, intbase);
2264
2265 if (endptr == s)
2266 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2267 inttype, name);
2268
2269 if (errno != ERANGE)
2270 if (tolower(*endptr) == 'k')
2271 {
2272 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2273 else lvalue *= 1024;
2274 endptr++;
2275 }
2276 else if (tolower(*endptr) == 'm')
2277 {
2278 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2279 errno = ERANGE;
2280 else lvalue *= 1024*1024;
2281 endptr++;
2282 }
2283 else if (tolower(*endptr) == 'g')
2284 {
2285 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2286 errno = ERANGE;
2287 else lvalue *= 1024*1024*1024;
2288 endptr++;
2289 }
2290
2291 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2292 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2293 "absolute value of integer \"%s\" is too large (overflow)", s);
2294
2295 while (isspace(*endptr)) endptr++;
2296 if (*endptr != 0)
2297 extra_chars_error(endptr, inttype, US"integer value for ", name);
2298
2299 value = (int)lvalue;
2300 }
2301
2302 if (data_block == NULL)
2303 *((int *)(ol->value)) = value;
2304 else
2305 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2306 break;
2307
2308 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2309 and G. */
2310 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2311
2312 case opt_Kint:
2313 {
2314 uschar *endptr;
2315 errno = 0;
2316 value = strtol(CS s, CSS &endptr, intbase);
2317
2318 if (endptr == s)
2319 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2320 inttype, name);
2321
2322 if (errno != ERANGE)
2323 if (tolower(*endptr) == 'g')
2324 {
2325 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2326 errno = ERANGE;
2327 else
2328 value *= 1024*1024;
2329 endptr++;
2330 }
2331 else if (tolower(*endptr) == 'm')
2332 {
2333 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2334 errno = ERANGE;
2335 else
2336 value *= 1024;
2337 endptr++;
2338 }
2339 else if (tolower(*endptr) == 'k')
2340 endptr++;
2341 else
2342 value = (value + 512)/1024;
2343
2344 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2345 "absolute value of integer \"%s\" is too large (overflow)", s);
2346
2347 while (isspace(*endptr)) endptr++;
2348 if (*endptr != 0)
2349 extra_chars_error(endptr, inttype, US"integer value for ", name);
2350 }
2351
2352 if (data_block == NULL)
2353 *((int *)(ol->value)) = value;
2354 else
2355 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2356 break;
2357
2358 /* Fixed-point number: held to 3 decimal places. */
2359
2360 case opt_fixed:
2361 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2362 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2363 "fixed-point number expected for %s", name);
2364
2365 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2366 "integer \"%s\" is too large (overflow)", s);
2367
2368 value *= 1000;
2369
2370 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2371 "integer \"%s\" is too large (overflow)", s);
2372
2373 /* We get a coverity error here for using count, as it derived
2374 from the tainted buffer pointed to by s, as parsed by sscanf().
2375 By the definition of sscanf we must be accessing between start
2376 and end of s (assuming it is nul-terminated...) so ignore the error. */
2377 /* coverity[tainted_data] */
2378 if (s[count] == '.')
2379 {
2380 int d = 100;
2381 while (isdigit(s[++count]))
2382 {
2383 value += (s[count] - '0') * d;
2384 d /= 10;
2385 }
2386 }
2387
2388 while (isspace(s[count])) count++;
2389
2390 if (s[count] != 0)
2391 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2392
2393 if (data_block == NULL)
2394 *((int *)(ol->value)) = value;
2395 else
2396 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2397 break;
2398
2399 /* There's a special routine to read time values. */
2400
2401 case opt_time:
2402 value = readconf_readtime(s, 0, FALSE);
2403 if (value < 0)
2404 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2405 name);
2406 if (data_block == NULL)
2407 *((int *)(ol->value)) = value;
2408 else
2409 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2410 break;
2411
2412 /* A time list is a list of colon-separated times, with the first
2413 element holding the size of the list and the second the number of
2414 entries used. */
2415
2416 case opt_timelist:
2417 {
2418 int count = 0;
2419 int *list = (data_block == NULL)?
2420 (int *)(ol->value) :
2421 (int *)((uschar *)data_block + (long int)(ol->value));
2422
2423 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2424 {
2425 int terminator = 0;
2426 uschar *snext = Ustrchr(s, ':');
2427 if (snext != NULL)
2428 {
2429 uschar *ss = snext;
2430 while (ss > s && isspace(ss[-1])) ss--;
2431 terminator = *ss;
2432 }
2433 value = readconf_readtime(s, terminator, FALSE);
2434 if (value < 0)
2435 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2436 name);
2437 if (count > 1 && value <= list[count])
2438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2439 "time value out of order for %s", name);
2440 list[count+1] = value;
2441 if (snext == NULL) break;
2442 s = snext + 1;
2443 while (isspace(*s)) s++;
2444 }
2445
2446 if (count > list[0] - 2)
2447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2448 name);
2449 if (count > 0 && list[2] == 0) count = 0;
2450 list[1] = count;
2451 break;
2452 }
2453
2454 case opt_func:
2455 {
2456 void (*fn)() = ol->value;
2457 fn(name, s);
2458 break;
2459 }
2460 }
2461
2462 return TRUE;
2463 }
2464
2465
2466
2467 /*************************************************
2468 * Print a time value *
2469 *************************************************/
2470
2471 /*
2472 Argument: a time value in seconds
2473 Returns: pointer to a fixed buffer containing the time as a string,
2474 in readconf_readtime() format
2475 */
2476
2477 uschar *
2478 readconf_printtime(int t)
2479 {
2480 int s, m, h, d, w;
2481 uschar *p = time_buffer;
2482
2483 if (t < 0)
2484 {
2485 *p++ = '-';
2486 t = -t;
2487 }
2488
2489 s = t % 60;
2490 t /= 60;
2491 m = t % 60;
2492 t /= 60;
2493 h = t % 24;
2494 t /= 24;
2495 d = t % 7;
2496 w = t/7;
2497
2498 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2499 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2500 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2501 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2502 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2503
2504 return time_buffer;
2505 }
2506
2507
2508
2509 /*************************************************
2510 * Print an individual option value *
2511 *************************************************/
2512
2513 /* This is used by the -bP option, so prints to the standard output.
2514 The entire options list is passed in as an argument, because some options come
2515 in pairs - typically uid/gid settings, which can either be explicit numerical
2516 values, or strings to be expanded later. If the numerical value is unset,
2517 search for "*expand_<name>" to see if there is a string equivalent.
2518
2519 Arguments:
2520 ol option entry, or NULL for an unknown option
2521 name option name
2522 options_block NULL for main configuration options; otherwise points to
2523 a driver block; if the option doesn't have opt_public
2524 set, then options_block->options_block is where the item
2525 resides.
2526 oltop points to the option list in which ol exists
2527 last one more than the offset of the last entry in optop
2528 no_labels do not show "foo = " at the start.
2529
2530 Returns: nothing
2531 */
2532
2533 static void
2534 print_ol(optionlist *ol, uschar *name, void *options_block,
2535 optionlist *oltop, int last, BOOL no_labels)
2536 {
2537 struct passwd *pw;
2538 struct group *gr;
2539 optionlist *ol2;
2540 void *value;
2541 uid_t *uidlist;
2542 gid_t *gidlist;
2543 uschar *s;
2544 uschar name2[64];
2545
2546 if (ol == NULL)
2547 {
2548 printf("%s is not a known option\n", name);
2549 return;
2550 }
2551
2552 /* Non-admin callers cannot see options that have been flagged secure by the
2553 "hide" prefix. */
2554
2555 if (!admin_user && (ol->type & opt_secure) != 0)
2556 {
2557 if (no_labels)
2558 printf("%s\n", hidden);
2559 else
2560 printf("%s = %s\n", name, hidden);
2561 return;
2562 }
2563
2564 /* Else show the value of the option */
2565
2566 value = ol->value;
2567 if (options_block != NULL)
2568 {
2569 if ((ol->type & opt_public) == 0)
2570 options_block = (void *)(((driver_instance *)options_block)->options_block);
2571 value = (void *)((uschar *)options_block + (long int)value);
2572 }
2573
2574 switch(ol->type & opt_mask)
2575 {
2576 case opt_stringptr:
2577 case opt_rewrite: /* Show the text value */
2578 s = *((uschar **)value);
2579 if (!no_labels) printf("%s = ", name);
2580 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2581 break;
2582
2583 case opt_int:
2584 if (!no_labels) printf("%s = ", name);
2585 printf("%d\n", *((int *)value));
2586 break;
2587
2588 case opt_mkint:
2589 {
2590 int x = *((int *)value);
2591 if (x != 0 && (x & 1023) == 0)
2592 {
2593 int c = 'K';
2594 x >>= 10;
2595 if ((x & 1023) == 0)
2596 {
2597 c = 'M';
2598 x >>= 10;
2599 }
2600 if (!no_labels) printf("%s = ", name);
2601 printf("%d%c\n", x, c);
2602 }
2603 else
2604 {
2605 if (!no_labels) printf("%s = ", name);
2606 printf("%d\n", x);
2607 }
2608 }
2609 break;
2610
2611 case opt_Kint:
2612 {
2613 int x = *((int *)value);
2614 if (!no_labels) printf("%s = ", name);
2615 if (x == 0) printf("0\n");
2616 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2617 else printf("%dK\n", x);
2618 }
2619 break;
2620
2621 case opt_octint:
2622 if (!no_labels) printf("%s = ", name);
2623 printf("%#o\n", *((int *)value));
2624 break;
2625
2626 /* Can be negative only when "unset", in which case integer */
2627
2628 case opt_fixed:
2629 {
2630 int x = *((int *)value);
2631 int f = x % 1000;
2632 int d = 100;
2633 if (x < 0) printf("%s =\n", name); else
2634 {
2635 if (!no_labels) printf("%s = ", name);
2636 printf("%d.", x/1000);
2637 do
2638 {
2639 printf("%d", f/d);
2640 f %= d;
2641 d /= 10;
2642 }
2643 while (f != 0);
2644 printf("\n");
2645 }
2646 }
2647 break;
2648
2649 /* If the numerical value is unset, try for the string value */
2650
2651 case opt_expand_uid:
2652 if (! *get_set_flag(name, oltop, last, options_block))
2653 {
2654 sprintf(CS name2, "*expand_%.50s", name);
2655 ol2 = find_option(name2, oltop, last);
2656 if (ol2 != NULL)
2657 {
2658 void *value2 = ol2->value;
2659 if (options_block != NULL)
2660 value2 = (void *)((uschar *)options_block + (long int)value2);
2661 s = *((uschar **)value2);
2662 if (!no_labels) printf("%s = ", name);
2663 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2664 break;
2665 }
2666 }
2667
2668 /* Else fall through */
2669
2670 case opt_uid:
2671 if (!no_labels) printf("%s = ", name);
2672 if (! *get_set_flag(name, oltop, last, options_block))
2673 printf("\n");
2674 else
2675 {
2676 pw = getpwuid(*((uid_t *)value));
2677 if (pw == NULL)
2678 printf("%ld\n", (long int)(*((uid_t *)value)));
2679 else printf("%s\n", pw->pw_name);
2680 }
2681 break;
2682
2683 /* If the numerical value is unset, try for the string value */
2684
2685 case opt_expand_gid:
2686 if (! *get_set_flag(name, oltop, last, options_block))
2687 {
2688 sprintf(CS name2, "*expand_%.50s", name);
2689 ol2 = find_option(name2, oltop, last);
2690 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2691 {
2692 void *value2 = ol2->value;
2693 if (options_block != NULL)
2694 value2 = (void *)((uschar *)options_block + (long int)value2);
2695 s = *((uschar **)value2);
2696 if (!no_labels) printf("%s = ", name);
2697 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2698 break;
2699 }
2700 }
2701
2702 /* Else fall through */
2703
2704 case opt_gid:
2705 if (!no_labels) printf("%s = ", name);
2706 if (! *get_set_flag(name, oltop, last, options_block))
2707 printf("\n");
2708 else
2709 {
2710 gr = getgrgid(*((int *)value));
2711 if (gr == NULL)
2712 printf("%ld\n", (long int)(*((int *)value)));
2713 else printf("%s\n", gr->gr_name);
2714 }
2715 break;
2716
2717 case opt_uidlist:
2718 uidlist = *((uid_t **)value);
2719 if (!no_labels) printf("%s =", name);
2720 if (uidlist != NULL)
2721 {
2722 int i;
2723 uschar sep = ' ';
2724 if (no_labels) sep = '\0';
2725 for (i = 1; i <= (int)(uidlist[0]); i++)
2726 {
2727 uschar *name = NULL;
2728 pw = getpwuid(uidlist[i]);
2729 if (pw != NULL) name = US pw->pw_name;
2730 if (sep != '\0') printf("%c", sep);
2731 if (name != NULL) printf("%s", name);
2732 else printf("%ld", (long int)(uidlist[i]));
2733 sep = ':';
2734 }
2735 }
2736 printf("\n");
2737 break;
2738
2739 case opt_gidlist:
2740 gidlist = *((gid_t **)value);
2741 if (!no_labels) printf("%s =", name);
2742 if (gidlist != NULL)
2743 {
2744 int i;
2745 uschar sep = ' ';
2746 if (no_labels) sep = '\0';
2747 for (i = 1; i <= (int)(gidlist[0]); i++)
2748 {
2749 uschar *name = NULL;
2750 gr = getgrgid(gidlist[i]);
2751 if (gr != NULL) name = US gr->gr_name;
2752 if (sep != '\0') printf("%c", sep);
2753 if (name != NULL) printf("%s", name);
2754 else printf("%ld", (long int)(gidlist[i]));
2755 sep = ':';
2756 }
2757 }
2758 printf("\n");
2759 break;
2760
2761 case opt_time:
2762 if (!no_labels) printf("%s = ", name);
2763 printf("%s\n", readconf_printtime(*((int *)value)));
2764 break;
2765
2766 case opt_timelist:
2767 {
2768 int i;
2769 int *list = (int *)value;
2770 if (!no_labels) printf("%s = ", name);
2771 for (i = 0; i < list[1]; i++)
2772 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2773 printf("\n");
2774 }
2775 break;
2776
2777 case opt_bit:
2778 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2779 "" : "no_", name);
2780 break;
2781
2782 case opt_expand_bool:
2783 sprintf(CS name2, "*expand_%.50s", name);
2784 ol2 = find_option(name2, oltop, last);
2785 if (ol2 != NULL && ol2->value != NULL)
2786 {
2787 void *value2 = ol2->value;
2788 if (options_block != NULL)
2789 value2 = (void *)((uschar *)options_block + (long int)value2);
2790 s = *((uschar **)value2);
2791 if (s != NULL)
2792 {
2793 if (!no_labels) printf("%s = ", name);
2794 printf("%s\n", string_printing(s));
2795 break;
2796 }
2797 /* s == NULL => string not set; fall through */
2798 }
2799
2800 /* Fall through */
2801
2802 case opt_bool:
2803 case opt_bool_verify:
2804 case opt_bool_set:
2805 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2806 break;
2807 }
2808 }
2809
2810
2811
2812 /*************************************************
2813 * Print value from main configuration *
2814 *************************************************/
2815
2816 /* This function, called as a result of encountering the -bP option,
2817 causes the value of any main configuration variable to be output if the
2818 second argument is NULL. There are some special values:
2819
2820 all print all main configuration options
2821 config_file print the name of the configuration file
2822 (configure_file will still work, for backward
2823 compatibility)
2824 routers print the routers' configurations
2825 transports print the transports' configuration
2826 authenticators print the authenticators' configuration
2827 macros print the macros' configuration
2828 router_list print a list of router names
2829 transport_list print a list of transport names
2830 authenticator_list print a list of authentication mechanism names
2831 macro_list print a list of macro names
2832 +name print a named list item
2833 local_scan print the local_scan options
2834 config print the configuration as it is parsed
2835 environment print the used execution environment
2836
2837 If the second argument is not NULL, it must be one of "router", "transport",
2838 "authenticator" or "macro" in which case the first argument identifies the
2839 driver whose options are to be printed.
2840
2841 Arguments:
2842 name option name if type == NULL; else driver name
2843 type NULL or driver type name, as described above
2844 no_labels avoid the "foo = " at the start of an item
2845
2846 Returns: nothing
2847 */
2848
2849 void
2850 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2851 {
2852 BOOL names_only = FALSE;
2853 optionlist *ol;
2854 optionlist *ol2 = NULL;
2855 driver_instance *d = NULL;
2856 macro_item *m;
2857 int size = 0;
2858
2859 if (type == NULL)
2860 {
2861 if (*name == '+')
2862 {
2863 int i;
2864 tree_node *t;
2865 BOOL found = FALSE;
2866 static uschar *types[] = { US"address", US"domain", US"host",
2867 US"localpart" };
2868 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2869 &hostlist_anchor, &localpartlist_anchor };
2870
2871 for (i = 0; i < 4; i++)
2872 {
2873 t = tree_search(*(anchors[i]), name+1);
2874 if (t != NULL)
2875 {
2876 found = TRUE;
2877 if (no_labels)
2878 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2879 else
2880 printf("%slist %s = %s\n", types[i], name+1,
2881 ((namedlist_block *)(t->data.ptr))->string);
2882 }
2883 }
2884
2885 if (!found)
2886 printf("no address, domain, host, or local part list called \"%s\" "
2887 "exists\n", name+1);
2888
2889 return;
2890 }
2891
2892 if ( Ustrcmp(name, "configure_file") == 0
2893 || Ustrcmp(name, "config_file") == 0)
2894 {
2895 printf("%s\n", CS config_main_filename);
2896 return;
2897 }
2898
2899 if (Ustrcmp(name, "all") == 0)
2900 {
2901 for (ol = optionlist_config;
2902 ol < optionlist_config + nelem(optionlist_config); ol++)
2903 {
2904 if ((ol->type & opt_hidden) == 0)
2905 print_ol(ol, US ol->name, NULL,
2906 optionlist_config, nelem(optionlist_config),
2907 no_labels);
2908 }
2909 return;
2910 }
2911
2912 if (Ustrcmp(name, "local_scan") == 0)
2913 {
2914 #ifndef LOCAL_SCAN_HAS_OPTIONS
2915 printf("local_scan() options are not supported\n");
2916 #else
2917 for (ol = local_scan_options;
2918 ol < local_scan_options + local_scan_options_count; ol++)
2919 {
2920 print_ol(ol, US ol->name, NULL, local_scan_options,
2921 local_scan_options_count, no_labels);
2922 }
2923 #endif
2924 return;
2925 }
2926
2927 if (Ustrcmp(name, "config") == 0)
2928 {
2929 print_config(admin_user, no_labels);
2930 return;
2931 }
2932
2933 if (Ustrcmp(name, "routers") == 0)
2934 {
2935 type = US"router";
2936 name = NULL;
2937 }
2938 else if (Ustrcmp(name, "transports") == 0)
2939 {
2940 type = US"transport";
2941 name = NULL;
2942 }
2943
2944 else if (Ustrcmp(name, "authenticators") == 0)
2945 {
2946 type = US"authenticator";
2947 name = NULL;
2948 }
2949
2950 else if (Ustrcmp(name, "macros") == 0)
2951 {
2952 type = US"macro";
2953 name = NULL;
2954 }
2955
2956 else if (Ustrcmp(name, "router_list") == 0)
2957 {
2958 type = US"router";
2959 name = NULL;
2960 names_only = TRUE;
2961 }
2962
2963 else if (Ustrcmp(name, "transport_list") == 0)
2964 {
2965 type = US"transport";
2966 name = NULL;
2967 names_only = TRUE;
2968 }
2969
2970 else if (Ustrcmp(name, "authenticator_list") == 0)
2971 {
2972 type = US"authenticator";
2973 name = NULL;
2974 names_only = TRUE;
2975 }
2976
2977 else if (Ustrcmp(name, "macro_list") == 0)
2978 {
2979 type = US"macro";
2980 name = NULL;
2981 names_only = TRUE;
2982 }
2983
2984 else if (Ustrcmp(name, "environment") == 0)
2985 {
2986 if (environ)
2987 {
2988 uschar ** p;
2989 for (p = USS environ; *p; p++) ;
2990 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2991
2992 for (p = USS environ; *p; p++)
2993 {
2994 uschar * q;
2995 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2996 puts(CS *p);
2997 }
2998 }
2999 return;
3000 }
3001
3002 else
3003 {
3004 print_ol(find_option(name, optionlist_config, nelem(optionlist_config)),
3005 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
3006 return;
3007 }
3008 }
3009
3010 /* Handle the options for a router or transport. Skip options that are flagged
3011 as hidden. Some of these are options with names starting with '*', used for
3012 internal alternative representations of other options (which the printing
3013 function will sort out). Others are synonyms kept for backward compatibility.
3014 */
3015
3016 if (Ustrcmp(type, "router") == 0)
3017 {
3018 d = (driver_instance *)routers;
3019 ol2 = optionlist_routers;
3020 size = optionlist_routers_size;
3021 }
3022 else if (Ustrcmp(type, "transport") == 0)
3023 {
3024 d = (driver_instance *)transports;
3025 ol2 = optionlist_transports;
3026 size = optionlist_transports_size;
3027 }
3028 else if (Ustrcmp(type, "authenticator") == 0)
3029 {
3030 d = (driver_instance *)auths;
3031 ol2 = optionlist_auths;
3032 size = optionlist_auths_size;
3033 }
3034
3035 else if (Ustrcmp(type, "macro") == 0)
3036 {
3037 /* People store passwords in macros and they were previously not available
3038 for printing. So we have an admin_users restriction. */
3039 if (!admin_user)
3040 {
3041 fprintf(stderr, "exim: permission denied\n");
3042 exit(EXIT_FAILURE);
3043 }
3044 if (!macros_builtin_created) macros_create_builtin();
3045 for (m = macros; m; m = m->next)
3046 if (!name || Ustrcmp(name, m->name) == 0)
3047 {
3048 if (names_only)
3049 printf("%s\n", CS m->name);
3050 else
3051 printf("%s=%s\n", CS m->name, CS m->replacement);
3052 if (name)
3053 return;
3054 }
3055 if (name)
3056 printf("%s %s not found\n", type, name);
3057 return;
3058 }
3059
3060 if (names_only)
3061 {
3062 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
3063 return;
3064 }
3065
3066 /* Either search for a given driver, or print all of them */
3067
3068 for (; d != NULL; d = d->next)
3069 {
3070 if (name == NULL)
3071 printf("\n%s %s:\n", d->name, type);
3072 else if (Ustrcmp(d->name, name) != 0) continue;
3073
3074 for (ol = ol2; ol < ol2 + size; ol++)
3075 {
3076 if ((ol->type & opt_hidden) == 0)
3077 print_ol(ol, US ol->name, d, ol2, size, no_labels);
3078 }
3079
3080 for (ol = d->info->options;
3081 ol < d->info->options + *(d->info->options_count); ol++)
3082 {
3083 if ((ol->type & opt_hidden) == 0)
3084 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
3085 }
3086 if (name != NULL) return;
3087 }
3088 if (name != NULL) printf("%s %s not found\n", type, name);
3089 }
3090
3091
3092
3093 /*************************************************
3094 * Read a named list item *
3095 *************************************************/
3096
3097 /* This function reads a name and a list (i.e. string). The name is used to
3098 save the list in a tree, sorted by its name. Each entry also has a number,
3099 which can be used for caching tests, but if the string contains any expansion
3100 items other than $key, the number is set negative to inhibit caching. This
3101 mechanism is used for domain, host, and address lists that are referenced by
3102 the "+name" syntax.
3103
3104 Arguments:
3105 anchorp points to the tree anchor
3106 numberp points to the current number for this tree
3107 max the maximum number permitted
3108 s the text of the option line, starting immediately after the name
3109 of the list type
3110 tname the name of the list type, for messages
3111
3112 Returns: nothing
3113 */
3114
3115 static void
3116 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3117 uschar *tname)
3118 {
3119 BOOL forcecache = FALSE;
3120 uschar *ss;
3121 tree_node *t;
3122 namedlist_block *nb = store_get(sizeof(namedlist_block));
3123
3124 if (Ustrncmp(s, "_cache", 6) == 0)
3125 {
3126 forcecache = TRUE;
3127 s += 6;
3128 }
3129
3130 if (!isspace(*s))
3131 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3132
3133 if (*numberp >= max)
3134 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3135 tname, max);
3136
3137 while (isspace(*s)) s++;
3138 ss = s;
3139 while (isalnum(*s) || *s == '_') s++;
3140 t = store_get(sizeof(tree_node) + s-ss);
3141 Ustrncpy(t->name, ss, s-ss);
3142 t->name[s-ss] = 0;
3143 while (isspace(*s)) s++;
3144
3145 if (!tree_insertnode(anchorp, t))
3146 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3147 "duplicate name \"%s\" for a named %s", t->name, tname);
3148
3149 t->data.ptr = nb;
3150 nb->number = *numberp;
3151 *numberp += 1;
3152
3153 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3154 "missing '=' after \"%s\"", t->name);
3155 while (isspace(*s)) s++;
3156 nb->string = read_string(s, t->name);
3157 nb->cache_data = NULL;
3158
3159 /* Check the string for any expansions; if any are found, mark this list
3160 uncacheable unless the user has explicited forced caching. */
3161
3162 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3163 }
3164
3165
3166
3167
3168 /*************************************************
3169 * Unpick data for a rate limit *
3170 *************************************************/
3171
3172 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3173 separate values.
3174
3175 Arguments:
3176 s string, in the form t,b,f,l
3177 where t is the threshold (integer)
3178 b is the initial delay (time)
3179 f is the multiplicative factor (fixed point)
3180 k is the maximum time (time)
3181 threshold where to store threshold
3182 base where to store base in milliseconds
3183 factor where to store factor in milliseconds
3184 limit where to store limit
3185
3186 Returns: nothing (panics on error)
3187 */
3188
3189 static void
3190 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3191 int *limit)
3192 {
3193 uschar bstring[16], lstring[16];
3194
3195 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3196 factor, lstring) == 4)
3197 {
3198 *base = readconf_readtime(bstring, 0, TRUE);
3199 *limit = readconf_readtime(lstring, 0, TRUE);
3200 if (*base >= 0 && *limit >= 0) return;
3201 }
3202 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3203 }
3204
3205
3206
3207
3208 /*************************************************
3209 * Drop privs for checking TLS config *
3210 *************************************************/
3211
3212 /* We want to validate TLS options during readconf, but do not want to be
3213 root when we call into the TLS library, in case of library linkage errors
3214 which cause segfaults; before this check, those were always done as the Exim
3215 runtime user and it makes sense to continue with that.
3216
3217 Assumes: tls_require_ciphers has been set, if it will be
3218 exim_user has been set, if it will be
3219 exim_group has been set, if it will be
3220
3221 Returns: bool for "okay"; false will cause caller to immediately exit.
3222 */
3223
3224 #ifdef SUPPORT_TLS
3225 static BOOL
3226 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3227 {
3228 const uschar *errmsg;
3229 pid_t pid;
3230 int rc, status;
3231 void (*oldsignal)(int);
3232
3233 /* If TLS will never be used, no point checking ciphers */
3234
3235 if ( !tls_advertise_hosts
3236 || !*tls_advertise_hosts
3237 || Ustrcmp(tls_advertise_hosts, ":") == 0
3238 )
3239 return TRUE;
3240 else if (!nowarn && !tls_certificate)
3241 log_write(0, LOG_MAIN,
3242 "Warning: No server certificate defined; will use a selfsigned one.\n"
3243 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3244
3245 oldsignal = signal(SIGCHLD, SIG_DFL);
3246
3247 fflush(NULL);
3248 if ((pid = fork()) < 0)
3249 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3250
3251 if (pid == 0)
3252 {
3253 /* in some modes, will have dropped privilege already */
3254 if (!geteuid())
3255 exim_setugid(exim_uid, exim_gid, FALSE,
3256 US"calling tls_validate_require_cipher");
3257
3258 if ((errmsg = tls_validate_require_cipher()))
3259 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3260 "tls_require_ciphers invalid: %s", errmsg);
3261 fflush(NULL);