27a834b3f7234cd21105b0f0a93e86a8f0f54a83
[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
26 /* Structure for chain (stack) of .included files */
27
28 typedef struct config_file_item {
29 struct config_file_item *next;
30 uschar *filename;
31 FILE *file;
32 int lineno;
33 } config_file_item;
34
35 /* Structure for chain of configuration lines (-bP config) */
36
37 typedef struct config_line_item {
38 struct config_line_item *next;
39 uschar *line;
40 } config_line_item;
41
42 static config_line_item* config_lines;
43
44 /* Structure of table of conditional words and their state transitions */
45
46 typedef struct cond_item {
47 uschar *name;
48 int namelen;
49 int action1;
50 int action2;
51 int pushpop;
52 } cond_item;
53
54 /* Structure of table of syslog facility names and values */
55
56 typedef struct syslog_fac_item {
57 uschar *name;
58 int value;
59 } syslog_fac_item;
60
61 /* constants */
62 static const char * const hidden = "<value not displayable>";
63
64 /* Static variables */
65
66 static config_file_item *config_file_stack = NULL; /* For includes */
67
68 static uschar *syslog_facility_str = NULL;
69 static uschar next_section[24];
70 static uschar time_buffer[24];
71
72 /* State variables for conditional loading (.ifdef / .else / .endif) */
73
74 static int cstate = 0;
75 static int cstate_stack_ptr = -1;
76 static int cstate_stack[CSTATE_STACK_SIZE];
77
78 /* Table of state transitions for handling conditional inclusions. There are
79 four possible state transitions:
80
81 .ifdef true
82 .ifdef false
83 .elifdef true (or .else)
84 .elifdef false
85
86 .endif just causes the previous cstate to be popped off the stack */
87
88 static int next_cstate[3][4] =
89 {
90 /* State 0: reading from file, or reading until next .else or .endif */
91 { 0, 1, 2, 2 },
92 /* State 1: condition failed, skipping until next .else or .endif */
93 { 2, 2, 0, 1 },
94 /* State 2: skipping until .endif */
95 { 2, 2, 2, 2 },
96 };
97
98 /* Table of conditionals and the states to set. For each name, there are four
99 values: the length of the name (to save computing it each time), the state to
100 set if a macro was found in the line, the state to set if a macro was not found
101 in the line, and a stack manipulation setting which is:
102
103 -1 pull state value off the stack
104 0 don't alter the stack
105 +1 push value onto stack, before setting new state
106 */
107
108 static cond_item cond_list[] = {
109 { US"ifdef", 5, 0, 1, 1 },
110 { US"ifndef", 6, 1, 0, 1 },
111 { US"elifdef", 7, 2, 3, 0 },
112 { US"elifndef", 8, 3, 2, 0 },
113 { US"else", 4, 2, 2, 0 },
114 { US"endif", 5, 0, 0, -1 }
115 };
116
117 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
118
119 /* Table of syslog facility names and their values */
120
121 static syslog_fac_item syslog_list[] = {
122 { US"mail", LOG_MAIL },
123 { US"user", LOG_USER },
124 { US"news", LOG_NEWS },
125 { US"uucp", LOG_UUCP },
126 { US"local0", LOG_LOCAL0 },
127 { US"local1", LOG_LOCAL1 },
128 { US"local2", LOG_LOCAL2 },
129 { US"local3", LOG_LOCAL3 },
130 { US"local4", LOG_LOCAL4 },
131 { US"local5", LOG_LOCAL5 },
132 { US"local6", LOG_LOCAL6 },
133 { US"local7", LOG_LOCAL7 },
134 { US"daemon", LOG_DAEMON }
135 };
136
137 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
138
139
140
141
142 /*************************************************
143 * Main configuration options *
144 *************************************************/
145
146 /* The list of options that can be set in the main configuration file. This
147 must be in alphabetic order because it is searched by binary chop. */
148
149 static optionlist optionlist_config[] = {
150 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
151 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
152 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
153 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
154 { "accept_8bitmime", opt_bool, &accept_8bitmime },
155 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
156 #ifdef WITH_CONTENT_SCAN
157 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
158 #endif
159 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
160 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
161 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
162 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
163 #ifndef DISABLE_PRDR
164 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
165 #endif
166 #ifndef DISABLE_DKIM
167 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
168 #endif
169 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
170 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
171 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
172 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
173 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
174 #ifdef WITH_CONTENT_SCAN
175 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
176 #endif
177 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
178 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
179 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
180 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
181 #ifdef SUPPORT_TLS
182 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
183 #endif
184 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
185 { "add_environment", opt_stringptr, &add_environment },
186 { "admin_groups", opt_gidlist, &admin_groups },
187 { "allow_domain_literals", opt_bool, &allow_domain_literals },
188 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
189 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
190 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
191 { "auto_thaw", opt_time, &auto_thaw },
192 #ifdef WITH_CONTENT_SCAN
193 { "av_scanner", opt_stringptr, &av_scanner },
194 #endif
195 { "bi_command", opt_stringptr, &bi_command },
196 #ifdef EXPERIMENTAL_BRIGHTMAIL
197 { "bmi_config_file", opt_stringptr, &bmi_config_file },
198 #endif
199 { "bounce_message_file", opt_stringptr, &bounce_message_file },
200 { "bounce_message_text", opt_stringptr, &bounce_message_text },
201 { "bounce_return_body", opt_bool, &bounce_return_body },
202 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
203 { "bounce_return_message", opt_bool, &bounce_return_message },
204 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
205 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
206 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
207 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
208 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
209 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
210 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
211 { "check_log_inodes", opt_int, &check_log_inodes },
212 { "check_log_space", opt_Kint, &check_log_space },
213 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
214 { "check_spool_inodes", opt_int, &check_spool_inodes },
215 { "check_spool_space", opt_Kint, &check_spool_space },
216 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
217 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
218 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
219 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
220 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
221 #ifdef EXPERIMENTAL_DCC
222 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
223 { "dccifd_address", opt_stringptr, &dccifd_address },
224 { "dccifd_options", opt_stringptr, &dccifd_options },
225 #endif
226 { "delay_warning", opt_timelist, &delay_warning },
227 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
228 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
229 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
230 { "delivery_date_remove", opt_bool, &delivery_date_remove },
231 #ifdef ENABLE_DISABLE_FSYNC
232 { "disable_fsync", opt_bool, &disable_fsync },
233 #endif
234 { "disable_ipv6", opt_bool, &disable_ipv6 },
235 #ifndef DISABLE_DKIM
236 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
237 #endif
238 #ifdef EXPERIMENTAL_DMARC
239 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
240 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
241 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
242 #endif
243 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
244 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
245 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
246 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
247 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
248 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
249 { "dns_retrans", opt_time, &dns_retrans },
250 { "dns_retry", opt_int, &dns_retry },
251 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
252 { "dns_use_edns0", opt_int, &dns_use_edns0 },
253 /* This option is now a no-op, retained for compability */
254 { "drop_cr", opt_bool, &drop_cr },
255 /*********************************************************/
256 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
257 { "dsn_from", opt_stringptr, &dsn_from },
258 { "envelope_to_remove", opt_bool, &envelope_to_remove },
259 { "errors_copy", opt_stringptr, &errors_copy },
260 { "errors_reply_to", opt_stringptr, &errors_reply_to },
261 #ifndef DISABLE_EVENT
262 { "event_action", opt_stringptr, &event_action },
263 #endif
264 { "exim_group", opt_gid, &exim_gid },
265 { "exim_path", opt_stringptr, &exim_path },
266 { "exim_user", opt_uid, &exim_uid },
267 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
268 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
269 { "finduser_retries", opt_int, &finduser_retries },
270 { "freeze_tell", opt_stringptr, &freeze_tell },
271 { "gecos_name", opt_stringptr, &gecos_name },
272 { "gecos_pattern", opt_stringptr, &gecos_pattern },
273 #ifdef SUPPORT_TLS
274 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
275 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
276 #endif
277 { "header_line_maxsize", opt_int, &header_line_maxsize },
278 { "header_maxsize", opt_int, &header_maxsize },
279 { "headers_charset", opt_stringptr, &headers_charset },
280 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
281 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
282 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
283 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
284 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
285 { "hold_domains", opt_stringptr, &hold_domains },
286 { "host_lookup", opt_stringptr, &host_lookup },
287 { "host_lookup_order", opt_stringptr, &host_lookup_order },
288 { "host_reject_connection", opt_stringptr, &host_reject_connection },
289 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
290 #ifdef SUPPORT_PROXY
291 { "hosts_proxy", opt_stringptr, &hosts_proxy },
292 #endif
293 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
294 #ifdef LOOKUP_IBASE
295 { "ibase_servers", opt_stringptr, &ibase_servers },
296 #endif
297 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
298 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
299 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
300 { "keep_environment", opt_stringptr, &keep_environment },
301 { "keep_malformed", opt_time, &keep_malformed },
302 #ifdef LOOKUP_LDAP
303 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
304 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
305 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
306 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
307 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
308 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
309 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
310 { "ldap_start_tls", opt_bool, &eldap_start_tls },
311 { "ldap_version", opt_int, &eldap_version },
312 #endif
313 { "local_from_check", opt_bool, &local_from_check },
314 { "local_from_prefix", opt_stringptr, &local_from_prefix },
315 { "local_from_suffix", opt_stringptr, &local_from_suffix },
316 { "local_interfaces", opt_stringptr, &local_interfaces },
317 { "local_scan_timeout", opt_time, &local_scan_timeout },
318 { "local_sender_retain", opt_bool, &local_sender_retain },
319 { "localhost_number", opt_stringptr, &host_number_string },
320 { "log_file_path", opt_stringptr, &log_file_path },
321 { "log_selector", opt_stringptr, &log_selector_string },
322 { "log_timezone", opt_bool, &log_timezone },
323 { "lookup_open_max", opt_int, &lookup_open_max },
324 { "max_username_length", opt_int, &max_username_length },
325 { "message_body_newlines", opt_bool, &message_body_newlines },
326 { "message_body_visible", opt_mkint, &message_body_visible },
327 { "message_id_header_domain", opt_stringptr, &message_id_domain },
328 { "message_id_header_text", opt_stringptr, &message_id_text },
329 { "message_logs", opt_bool, &message_logs },
330 { "message_size_limit", opt_stringptr, &message_size_limit },
331 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
332 { "move_frozen_messages", opt_bool, &move_frozen_messages },
333 #endif
334 { "mua_wrapper", opt_bool, &mua_wrapper },
335 #ifdef LOOKUP_MYSQL
336 { "mysql_servers", opt_stringptr, &mysql_servers },
337 #endif
338 { "never_users", opt_uidlist, &never_users },
339 #ifdef SUPPORT_TLS
340 { "openssl_options", opt_stringptr, &openssl_options },
341 #endif
342 #ifdef LOOKUP_ORACLE
343 { "oracle_servers", opt_stringptr, &oracle_servers },
344 #endif
345 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
346 #ifdef EXIM_PERL
347 { "perl_at_start", opt_bool, &opt_perl_at_start },
348 { "perl_startup", opt_stringptr, &opt_perl_startup },
349 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
350 #endif
351 #ifdef LOOKUP_PGSQL
352 { "pgsql_servers", opt_stringptr, &pgsql_servers },
353 #endif
354 { "pid_file_path", opt_stringptr, &pid_file_path },
355 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
356 #ifndef DISABLE_PRDR
357 { "prdr_enable", opt_bool, &prdr_enable },
358 #endif
359 { "preserve_message_logs", opt_bool, &preserve_message_logs },
360 { "primary_hostname", opt_stringptr, &primary_hostname },
361 { "print_topbitchars", opt_bool, &print_topbitchars },
362 { "process_log_path", opt_stringptr, &process_log_path },
363 { "prod_requires_admin", opt_bool, &prod_requires_admin },
364 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
365 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
366 { "queue_domains", opt_stringptr, &queue_domains },
367 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
368 { "queue_only", opt_bool, &queue_only },
369 { "queue_only_file", opt_stringptr, &queue_only_file },
370 { "queue_only_load", opt_fixed, &queue_only_load },
371 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
372 { "queue_only_override", opt_bool, &queue_only_override },
373 { "queue_run_in_order", opt_bool, &queue_run_in_order },
374 { "queue_run_max", opt_stringptr, &queue_run_max },
375 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
376 { "receive_timeout", opt_time, &receive_timeout },
377 { "received_header_text", opt_stringptr, &received_header_text },
378 { "received_headers_max", opt_int, &received_headers_max },
379 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
380 { "recipients_max", opt_int, &recipients_max },
381 { "recipients_max_reject", opt_bool, &recipients_max_reject },
382 #ifdef LOOKUP_REDIS
383 { "redis_servers", opt_stringptr, &redis_servers },
384 #endif
385 { "remote_max_parallel", opt_int, &remote_max_parallel },
386 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
387 { "retry_data_expire", opt_time, &retry_data_expire },
388 { "retry_interval_max", opt_time, &retry_interval_max },
389 { "return_path_remove", opt_bool, &return_path_remove },
390 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
391 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
392 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
393 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
394 { "slow_lookup_log", opt_int, &slow_lookup_log },
395 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
396 { "smtp_accept_max", opt_int, &smtp_accept_max },
397 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
398 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
399 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
400 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
401 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
402 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
403 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
404 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
405 { "smtp_banner", opt_stringptr, &smtp_banner },
406 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
407 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
408 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
409 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
410 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
411 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
412 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
413 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
414 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
415 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
416 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
417 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
418 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
419 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
420 #ifdef SUPPORT_I18N
421 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
422 #endif
423 #ifdef WITH_CONTENT_SCAN
424 { "spamd_address", opt_stringptr, &spamd_address },
425 #endif
426 #ifdef EXPERIMENTAL_SPF
427 { "spf_guess", opt_stringptr, &spf_guess },
428 #endif
429 { "split_spool_directory", opt_bool, &split_spool_directory },
430 { "spool_directory", opt_stringptr, &spool_directory },
431 #ifdef LOOKUP_SQLITE
432 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
433 #endif
434 #ifdef EXPERIMENTAL_SRS
435 { "srs_config", opt_stringptr, &srs_config },
436 { "srs_hashlength", opt_int, &srs_hashlength },
437 { "srs_hashmin", opt_int, &srs_hashmin },
438 { "srs_maxage", opt_int, &srs_maxage },
439 { "srs_secrets", opt_stringptr, &srs_secrets },
440 { "srs_usehash", opt_bool, &srs_usehash },
441 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
442 #endif
443 { "strict_acl_vars", opt_bool, &strict_acl_vars },
444 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
445 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
446 { "syslog_duplication", opt_bool, &syslog_duplication },
447 { "syslog_facility", opt_stringptr, &syslog_facility_str },
448 { "syslog_pid", opt_bool, &syslog_pid },
449 { "syslog_processname", opt_stringptr, &syslog_processname },
450 { "syslog_timestamp", opt_bool, &syslog_timestamp },
451 { "system_filter", opt_stringptr, &system_filter },
452 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
453 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
454 { "system_filter_group", opt_gid, &system_filter_gid },
455 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
456 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
457 { "system_filter_user", opt_uid, &system_filter_uid },
458 { "tcp_nodelay", opt_bool, &tcp_nodelay },
459 #ifdef USE_TCP_WRAPPERS
460 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
461 #endif
462 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
463 { "timezone", opt_stringptr, &timezone_string },
464 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
465 #ifdef SUPPORT_TLS
466 { "tls_certificate", opt_stringptr, &tls_certificate },
467 { "tls_crl", opt_stringptr, &tls_crl },
468 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
469 { "tls_dhparam", opt_stringptr, &tls_dhparam },
470 { "tls_eccurve", opt_stringptr, &tls_eccurve },
471 # ifndef DISABLE_OCSP
472 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
473 # endif
474 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
475 { "tls_privatekey", opt_stringptr, &tls_privatekey },
476 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
477 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
478 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
479 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
480 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
481 #endif
482 { "trusted_groups", opt_gidlist, &trusted_groups },
483 { "trusted_users", opt_uidlist, &trusted_users },
484 { "unknown_login", opt_stringptr, &unknown_login },
485 { "unknown_username", opt_stringptr, &unknown_username },
486 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
487 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
488 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
489 { "warn_message_file", opt_stringptr, &warn_message_file },
490 { "write_rejectlog", opt_bool, &write_rejectlog }
491 };
492
493 static int optionlist_config_size = nelem(optionlist_config);
494
495
496
497 /*************************************************
498 * Find the name of an option *
499 *************************************************/
500
501 /* This function is to aid debugging. Various functions take arguments that are
502 pointer variables in the options table or in option tables for various drivers.
503 For debugging output, it is useful to be able to find the name of the option
504 which is currently being processed. This function finds it, if it exists, by
505 searching the table(s).
506
507 Arguments: a value that is presumed to be in the table above
508 Returns: the option name, or an empty string
509 */
510
511 uschar *
512 readconf_find_option(void *p)
513 {
514 int i;
515 router_instance *r;
516 transport_instance *t;
517
518 for (i = 0; i < nelem(optionlist_config); i++)
519 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
520
521 for (r = routers; r; r = r->next)
522 {
523 router_info *ri = r->info;
524 for (i = 0; i < *ri->options_count; i++)
525 {
526 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
527 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
528 return US ri->options[i].name;
529 }
530 }
531
532 for (t = transports; t; t = t->next)
533 {
534 transport_info *ti = t->info;
535 for (i = 0; i < *ti->options_count; i++)
536 {
537 optionlist * op = &ti->options[i];
538 if ((op->type & opt_mask) != opt_stringptr) continue;
539 if (p == ( op->type & opt_public
540 ? (char *)t
541 : (char *)t->options_block
542 )
543 + (long int)op->value)
544 return US op->name;
545 }
546 }
547
548 return US"";
549 }
550
551
552
553
554 /*************************************************
555 * Deal with an assignment to a macro *
556 *************************************************/
557
558 /* We have a new definition. The macro_item structure includes a final vector
559 called "name" which is one byte long. Thus, adding "namelen" gives us enough
560 room to store the "name" string.
561 If a builtin macro we place at head of list, else tail. This lets us lazy-create
562 builtins. */
563
564 macro_item *
565 macro_create(const uschar * name, const uschar * val,
566 BOOL command_line, BOOL builtin)
567 {
568 unsigned namelen = Ustrlen(name);
569 macro_item * m = store_get(sizeof(macro_item) + namelen);
570
571 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val) */
572 if (!macros)
573 {
574 macros = m;
575 mlast = m;
576 m->next = NULL;
577 }
578 else if (builtin)
579 {
580 m->next = macros;
581 macros = m;
582 }
583 else
584 {
585 mlast->next = m;
586 mlast = m;
587 m->next = NULL;
588 }
589 m->command_line = command_line;
590 m->namelen = namelen;
591 m->replacement = string_copy(val);
592 Ustrcpy(m->name, name);
593 return m;
594 }
595
596
597 /* This function is called when a line that starts with an upper case letter is
598 encountered. The argument "line" should contain a complete logical line, and
599 start with the first letter of the macro name. The macro name and the
600 replacement text are extracted and stored. Redefinition of existing,
601 non-command line, macros is permitted using '==' instead of '='.
602
603 Arguments:
604 s points to the start of the logical line
605
606 Returns: nothing
607 */
608
609 static void
610 read_macro_assignment(uschar *s)
611 {
612 uschar name[64];
613 int namelen = 0;
614 BOOL redef = FALSE;
615 macro_item *m;
616
617 while (isalnum(*s) || *s == '_')
618 {
619 if (namelen >= sizeof(name) - 1)
620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
621 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
622 name[namelen++] = *s++;
623 }
624 name[namelen] = 0;
625
626 while (isspace(*s)) s++;
627 if (*s++ != '=')
628 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
629
630 if (*s == '=')
631 {
632 redef = TRUE;
633 s++;
634 }
635 while (isspace(*s)) s++;
636
637 /* If an existing macro of the same name was defined on the command line, we
638 just skip this definition. It's an error to attempt to redefine a macro without
639 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
640 It is also an error to define a macro whose name begins with the name of a
641 previously defined macro. This is the requirement that make using a tree
642 for macros hard; we must check all macros for the substring. Perhaps a
643 sorted list, and a bsearch, would work?
644 Note: it is documented that the other way round works. */
645
646 for (m = macros; m; m = m->next)
647 {
648 if (Ustrcmp(m->name, name) == 0)
649 {
650 if (!m->command_line && !redef)
651 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
652 "defined (use \"==\" if you want to redefine it", name);
653 break;
654 }
655
656 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
657 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
658 "a macro because previously defined macro \"%s\" is a substring",
659 name, m->name);
660
661 /* We cannot have this test, because it is documented that a substring
662 macro is permitted (there is even an example).
663 *
664 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
665 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
666 * "a macro because it is a substring of previously defined macro \"%s\"",
667 * name, m->name);
668 */
669 }
670
671 /* Check for an overriding command-line definition. */
672
673 if (m && m->command_line) return;
674
675 /* Redefinition must refer to an existing macro. */
676
677 if (redef)
678 if (m)
679 m->replacement = string_copy(s);
680 else
681 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
682 "\"%s\"", name);
683
684 /* We have a new definition. */
685 else
686 (void) macro_create(name, s, FALSE, FALSE);
687 }
688
689
690
691
692
693 /*************************************************/
694 /* Create compile-time feature macros */
695 static void
696 readconf_features(void)
697 {
698 /* Probably we could work out a static initialiser for wherever
699 macros are stored, but this will do for now. Some names are awkward
700 due to conflicts with other common macros. */
701
702 #ifdef SUPPORT_CRYPTEQ
703 macro_create(US"_HAVE_CRYPTEQ", US"y", FALSE, TRUE);
704 #endif
705 #if HAVE_ICONV
706 macro_create(US"_HAVE_ICONV", US"y", FALSE, TRUE);
707 #endif
708 #if HAVE_IPV6
709 macro_create(US"_HAVE_IPV6", US"y", FALSE, TRUE);
710 #endif
711 #ifdef HAVE_SETCLASSRESOURCES
712 macro_create(US"_HAVE_SETCLASSRESOURCES", US"y", FALSE, TRUE);
713 #endif
714 #ifdef SUPPORT_PAM
715 macro_create(US"_HAVE_PAM", US"y", FALSE, TRUE);
716 #endif
717 #ifdef EXIM_PERL
718 macro_create(US"_HAVE_PERL", US"y", FALSE, TRUE);
719 #endif
720 #ifdef EXPAND_DLFUNC
721 macro_create(US"_HAVE_DLFUNC", US"y", FALSE, TRUE);
722 #endif
723 #ifdef USE_TCP_WRAPPERS
724 macro_create(US"_HAVE_TCPWRAPPERS", US"y", FALSE, TRUE);
725 #endif
726 #ifdef SUPPORT_TLS
727 macro_create(US"_HAVE_TLS", US"y", FALSE, TRUE);
728 # ifdef USE_GNUTLS
729 macro_create(US"_HAVE_GNUTLS", US"y", FALSE, TRUE);
730 # else
731 macro_create(US"_HAVE_OPENSSL", US"y", FALSE, TRUE);
732 # endif
733 #endif
734 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
735 macro_create(US"_HAVE_TRANSLATE_IP_ADDRESS", US"y", FALSE, TRUE);
736 #endif
737 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
738 macro_create(US"_HAVE_MOVE_FROZEN_MESSAGES", US"y", FALSE, TRUE);
739 #endif
740 #ifdef WITH_CONTENT_SCAN
741 macro_create(US"_HAVE_CONTENT_SCANNING", US"y", FALSE, TRUE);
742 #endif
743 #ifndef DISABLE_DKIM
744 macro_create(US"_HAVE_DKIM", US"y", FALSE, TRUE);
745 #endif
746 #ifndef DISABLE_DNSSEC
747 macro_create(US"_HAVE_DNSSEC", US"y", FALSE, TRUE);
748 #endif
749 #ifndef DISABLE_EVENT
750 macro_create(US"_HAVE_EVENT", US"y", FALSE, TRUE);
751 #endif
752 #ifdef SUPPORT_I18N
753 macro_create(US"_HAVE_I18N", US"y", FALSE, TRUE);
754 #endif
755 #ifndef DISABLE_OCSP
756 macro_create(US"_HAVE_OCSP", US"y", FALSE, TRUE);
757 #endif
758 #ifndef DISABLE_PRDR
759 macro_create(US"_HAVE_PRDR", US"y", FALSE, TRUE);
760 #endif
761 #ifdef SUPPORT_PROXY
762 macro_create(US"_HAVE_PROXY", US"y", FALSE, TRUE);
763 #endif
764 #ifdef SUPPORT_SOCKS
765 macro_create(US"_HAVE_SOCKS", US"y", FALSE, TRUE);
766 #endif
767 #ifdef TCP_FASTOPEN
768 macro_create(US"_HAVE_TCP_FASTOPEN", US"y", FALSE, TRUE);
769 #endif
770 #ifdef EXPERIMENTAL_LMDB
771 macro_create(US"_HAVE_LMDB", US"y", FALSE, TRUE);
772 #endif
773 #ifdef EXPERIMENTAL_SPF
774 macro_create(US"_HAVE_SPF", US"y", FALSE, TRUE);
775 #endif
776 #ifdef EXPERIMENTAL_SRS
777 macro_create(US"_HAVE_SRS", US"y", FALSE, TRUE);
778 #endif
779 #ifdef EXPERIMENTAL_BRIGHTMAIL
780 macro_create(US"_HAVE_BRIGHTMAIL", US"y", FALSE, TRUE);
781 #endif
782 #ifdef EXPERIMENTAL_DANE
783 macro_create(US"_HAVE_DANE", US"y", FALSE, TRUE);
784 #endif
785 #ifdef EXPERIMENTAL_DCC
786 macro_create(US"_HAVE_DCC", US"y", FALSE, TRUE);
787 #endif
788 #ifdef EXPERIMENTAL_DMARC
789 macro_create(US"_HAVE_DMARC", US"y", FALSE, TRUE);
790 #endif
791 #ifdef EXPERIMENTAL_DSN_INFO
792 macro_create(US"_HAVE_DSN_INFO", US"y", FALSE, TRUE);
793 #endif
794
795 #ifdef LOOKUP_LSEARCH
796 macro_create(US"_HAVE_LKUP_LSEARCH", US"y", FALSE, TRUE);
797 #endif
798 #ifdef LOOKUP_CDB
799 macro_create(US"_HAVE_LKUP_CDB", US"y", FALSE, TRUE);
800 #endif
801 #ifdef LOOKUP_DBM
802 macro_create(US"_HAVE_LKUP_DBM", US"y", FALSE, TRUE);
803 #endif
804 #ifdef LOOKUP_DNSDB
805 macro_create(US"_HAVE_LKUP_DNSDB", US"y", FALSE, TRUE);
806 #endif
807 #ifdef LOOKUP_DSEARCH
808 macro_create(US"_HAVE_LKUP_DSEARCH", US"y", FALSE, TRUE);
809 #endif
810 #ifdef LOOKUP_IBASE
811 macro_create(US"_HAVE_LKUP_IBASE", US"y", FALSE, TRUE);
812 #endif
813 #ifdef LOOKUP_LDAP
814 macro_create(US"_HAVE_LKUP_LDAP", US"y", FALSE, TRUE);
815 #endif
816 #ifdef EXPERIMENTAL_LMDB
817 macro_create(US"_HAVE_LKUP_LMDB", US"y", FALSE, TRUE);
818 #endif
819 #ifdef LOOKUP_MYSQL
820 macro_create(US"_HAVE_LKUP_MYSQL", US"y", FALSE, TRUE);
821 #endif
822 #ifdef LOOKUP_NIS
823 macro_create(US"_HAVE_LKUP_NIS", US"y", FALSE, TRUE);
824 #endif
825 #ifdef LOOKUP_NISPLUS
826 macro_create(US"_HAVE_LKUP_NISPLUS", US"y", FALSE, TRUE);
827 #endif
828 #ifdef LOOKUP_ORACLE
829 macro_create(US"_HAVE_LKUP_ORACLE", US"y", FALSE, TRUE);
830 #endif
831 #ifdef LOOKUP_PASSWD
832 macro_create(US"_HAVE_LKUP_PASSWD", US"y", FALSE, TRUE);
833 #endif
834 #ifdef LOOKUP_PGSQL
835 macro_create(US"_HAVE_LKUP_PGSQL", US"y", FALSE, TRUE);
836 #endif
837 #ifdef LOOKUP_REDIS
838 macro_create(US"_HAVE_LKUP_REDIS", US"y", FALSE, TRUE);
839 #endif
840 #ifdef LOOKUP_SQLITE
841 macro_create(US"_HAVE_LKUP_SQLITE", US"y", FALSE, TRUE);
842 #endif
843 #ifdef LOOKUP_TESTDB
844 macro_create(US"_HAVE_LKUP_TESTDB", US"y", FALSE, TRUE);
845 #endif
846 #ifdef LOOKUP_WHOSON
847 macro_create(US"_HAVE_LKUP_WHOSON", US"y", FALSE, TRUE);
848 #endif
849
850 #ifdef TRANSPORT_APPENDFILE
851 # ifdef SUPPORT_MAILDIR
852 macro_create(US"_HAVE_TPT_APPEND_MAILDR", US"y", FALSE, TRUE);
853 # endif
854 # ifdef SUPPORT_MAILSTORE
855 macro_create(US"_HAVE_TPT_APPEND_MAILSTORE", US"y", FALSE, TRUE);
856 # endif
857 # ifdef SUPPORT_MBX
858 macro_create(US"_HAVE_TPT_APPEND_MBX", US"y", FALSE, TRUE);
859 # endif
860 #endif
861 }
862
863
864 void
865 readconf_options_from_list(optionlist * opts, unsigned nopt, uschar * group)
866 {
867 int i;
868 const uschar * s;
869
870 /* The 'previously-defined-substring' rule for macros in config file
871 lines is done so for these builtin macros: we know that the table
872 we source from is in strict alpha order, hence the builtins portion
873 of the macros list is in reverse-alpha (we prepend them) - so longer
874 macros that have substrings are always discovered first during
875 expansion. */
876
877 for (i = 0; i < nopt; i++) if (*(s = opts[i].name) && *s != '*')
878 macro_create(string_sprintf("_OPT_%T_%T", group, s), US"y", FALSE, TRUE);
879 }
880
881
882 static void
883 readconf_options(void)
884 {
885 readconf_options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN");
886 readconf_options_routers();
887 readconf_options_transports();
888 readconf_options_auths();
889 }
890
891 static void
892 macros_create_builtin(void)
893 {
894 readconf_features();
895 readconf_options();
896 macros_builtin_created = TRUE;
897 }
898
899
900 /*************************************************
901 * Read configuration line *
902 *************************************************/
903
904 /* A logical line of text is read from the configuration file into the big
905 buffer, taking account of macros, .includes, and continuations. The size of
906 big_buffer is increased if necessary. The count of configuration lines is
907 maintained. Physical input lines starting with # (ignoring leading white space,
908 and after macro replacement) and empty logical lines are always ignored.
909 Leading and trailing spaces are removed.
910
911 If we hit a line of the form "begin xxxx", the xxxx is placed in the
912 next_section vector, and the function returns NULL, indicating the end of a
913 configuration section. On end-of-file, NULL is returned with next_section
914 empty.
915
916 Arguments: none
917
918 Returns: a pointer to the first non-blank in the line,
919 or NULL if eof or end of section is reached
920 */
921
922 static uschar *
923 get_config_line(void)
924 {
925 int startoffset = 0; /* To first non-blank char in logical line */
926 int len = 0; /* Of logical line so far */
927 int newlen;
928 uschar *s, *ss;
929 macro_item *m;
930 BOOL macro_found;
931
932 /* Loop for handling continuation lines, skipping comments, and dealing with
933 .include files. */
934
935 for (;;)
936 {
937 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
938 {
939 if (config_file_stack != NULL) /* EOF inside .include */
940 {
941 (void)fclose(config_file);
942 config_file = config_file_stack->file;
943 config_filename = config_file_stack->filename;
944 config_lineno = config_file_stack->lineno;
945 config_file_stack = config_file_stack->next;
946 if (config_lines)
947 save_config_position(config_filename, config_lineno);
948 continue;
949 }
950
951 /* EOF at top level */
952
953 if (cstate_stack_ptr >= 0)
954 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
955 "Unexpected end of configuration file: .endif missing");
956
957 if (len != 0) break; /* EOF after continuation */
958 next_section[0] = 0; /* EOF at start of logical line */
959 return NULL;
960 }
961
962 config_lineno++;
963 newlen = len + Ustrlen(big_buffer + len);
964
965 if (config_lines && config_lineno == 1)
966 save_config_position(config_filename, config_lineno);
967
968 /* Handle pathologically long physical lines - yes, it did happen - by
969 extending big_buffer at this point. The code also copes with very long
970 logical lines. */
971
972 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
973 {
974 uschar *newbuffer;
975 big_buffer_size += BIG_BUFFER_SIZE;
976 newbuffer = store_malloc(big_buffer_size);
977
978 /* This use of strcpy is OK because we know that the string in the old
979 buffer is shorter than the new buffer. */
980
981 Ustrcpy(newbuffer, big_buffer);
982 store_free(big_buffer);
983 big_buffer = newbuffer;
984 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
985 break;
986 newlen += Ustrlen(big_buffer + newlen);
987 }
988
989 /* Find the true start of the physical line - leading spaces are always
990 ignored. */
991
992 ss = big_buffer + len;
993 while (isspace(*ss)) ss++;
994
995 /* Process the physical line for macros. If this is the start of the logical
996 line, skip over initial text at the start of the line if it starts with an
997 upper case character followed by a sequence of name characters and an equals
998 sign, because that is the definition of a new macro, and we don't do
999 replacement therein. */
1000
1001 s = ss;
1002 if (len == 0 && isupper(*s))
1003 {
1004 while (isalnum(*s) || *s == '_') s++;
1005 while (isspace(*s)) s++;
1006 if (*s != '=') s = ss; /* Not a macro definition */
1007 }
1008
1009 /* If the builtin macros are not yet defined, and the line contains an
1010 underscrore followed by an one of the three possible chars used by
1011 builtins, create them. */
1012
1013 if (!macros_builtin_created)
1014 {
1015 const uschar * t, * p;
1016 uschar c;
1017 for (t = s; (p = CUstrchr(t, '_')); t = p+1)
1018 if (c = p[1], c == 'O' || c == 'D' || c == 'H')
1019 {
1020 /* fprintf(stderr, "%s: builtins create triggered by '%s'\n", __FUNCTION__, s); */
1021 macros_create_builtin();
1022 break;
1023 }
1024 }
1025
1026 /* For each defined macro, scan the line (from after XXX= if present),
1027 replacing all occurrences of the macro. */
1028
1029 macro_found = FALSE;
1030 for (m = macros; m; m = m->next)
1031 {
1032 uschar *p, *pp;
1033 uschar *t = s;
1034
1035 while ((p = Ustrstr(t, m->name)) != NULL)
1036 {
1037 int moveby;
1038 int replen = Ustrlen(m->replacement);
1039
1040 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, t) */
1041 /* Expand the buffer if necessary */
1042
1043 while (newlen - m->namelen + replen + 1 > big_buffer_size)
1044 {
1045 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
1046 uschar *newbuffer = store_malloc(newsize);
1047 memcpy(newbuffer, big_buffer, newlen + 1);
1048 p = newbuffer + (p - big_buffer);
1049 s = newbuffer + (s - big_buffer);
1050 ss = newbuffer + (ss - big_buffer);
1051 t = newbuffer + (t - big_buffer);
1052 big_buffer_size = newsize;
1053 store_free(big_buffer);
1054 big_buffer = newbuffer;
1055 }
1056
1057 /* Shuffle the remaining characters up or down in the buffer before
1058 copying in the replacement text. Don't rescan the replacement for this
1059 same macro. */
1060
1061 pp = p + m->namelen;
1062 if ((moveby = replen - m->namelen) != 0)
1063 {
1064 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
1065 newlen += moveby;
1066 }
1067 Ustrncpy(p, m->replacement, replen);
1068 t = p + replen;
1069 macro_found = TRUE;
1070 }
1071 }
1072
1073 /* An empty macro replacement at the start of a line could mean that ss no
1074 longer points to the first non-blank character. */
1075
1076 while (isspace(*ss)) ss++;
1077
1078 /* Check for comment lines - these are physical lines. */
1079
1080 if (*ss == '#') continue;
1081
1082 /* Handle conditionals, which are also applied to physical lines. Conditions
1083 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1084 expansion occured on the rest of the line. A preliminary test for the leading
1085 '.' saves effort on most lines. */
1086
1087 if (*ss == '.')
1088 {
1089 int i;
1090
1091 /* Search the list of conditional directives */
1092
1093 for (i = 0; i < cond_list_size; i++)
1094 {
1095 int n;
1096 cond_item *c = cond_list+i;
1097 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1098
1099 /* The following character must be white space or end of string */
1100
1101 n = ss[1 + c->namelen];
1102 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1103
1104 /* .ifdef and .ifndef push the current state onto the stack, then set
1105 a new one from the table. Stack overflow is an error */
1106
1107 if (c->pushpop > 0)
1108 {
1109 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1110 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1111 ".%s nested too deeply", c->name);
1112 cstate_stack[++cstate_stack_ptr] = cstate;
1113 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1114 }
1115
1116 /* For any of the others, stack underflow is an error. The next state
1117 comes either from the stack (.endif) or from the table. */
1118
1119 else
1120 {
1121 if (cstate_stack_ptr < 0)
1122 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1123 ".%s without matching .ifdef", c->name);
1124 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1125 next_cstate[cstate][macro_found? c->action1 : c->action2];
1126 }
1127
1128 /* Having dealt with a directive, break the loop */
1129
1130 break;
1131 }
1132
1133 /* If we have handled a conditional directive, continue with the next
1134 physical line. Otherwise, fall through. */
1135
1136 if (i < cond_list_size) continue;
1137 }
1138
1139 /* If the conditional state is not 0 (actively using these lines), ignore
1140 this input line. */
1141
1142 if (cstate != 0) continue; /* Conditional skip */
1143
1144 /* Handle .include lines - these are also physical lines. */
1145
1146 if (Ustrncmp(ss, ".include", 8) == 0 &&
1147 (isspace(ss[8]) ||
1148 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1149 {
1150 uschar *t;
1151 int include_if_exists = isspace(ss[8])? 0 : 10;
1152 config_file_item *save;
1153 struct stat statbuf;
1154
1155 ss += 9 + include_if_exists;
1156 while (isspace(*ss)) ss++;
1157 t = ss + Ustrlen(ss);
1158 while (t > ss && isspace(t[-1])) t--;
1159 if (*ss == '\"' && t[-1] == '\"')
1160 {
1161 ss++;
1162 t--;
1163 }
1164 *t = 0;
1165
1166 if (*ss != '/')
1167 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1168 "absolute path \"%s\"", ss);
1169
1170 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1171
1172 if (config_lines)
1173 save_config_position(config_filename, config_lineno);
1174 save = store_get(sizeof(config_file_item));
1175 save->next = config_file_stack;
1176 config_file_stack = save;
1177 save->file = config_file;
1178 save->filename = config_filename;
1179 save->lineno = config_lineno;
1180
1181 if (!(config_file = Ufopen(ss, "rb")))
1182 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1183 "configuration file %s", ss);
1184
1185 config_filename = string_copy(ss);
1186 config_lineno = 0;
1187 continue;
1188 }
1189
1190 /* If this is the start of the logical line, remember where the non-blank
1191 data starts. Otherwise shuffle down continuation lines to remove leading
1192 white space. */
1193
1194 if (len == 0)
1195 startoffset = ss - big_buffer;
1196 else
1197 {
1198 s = big_buffer + len;
1199 if (ss > s)
1200 {
1201 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1202 newlen -= ss - s;
1203 }
1204 }
1205
1206 /* Accept the new addition to the line. Remove trailing white space. */
1207
1208 len = newlen;
1209 while (len > 0 && isspace(big_buffer[len-1])) len--;
1210 big_buffer[len] = 0;
1211
1212 /* We are done if the line does not end in backslash and contains some data.
1213 Empty logical lines are ignored. For continuations, remove the backslash and
1214 go round the loop to read the continuation line. */
1215
1216 if (len > 0)
1217 {
1218 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1219 big_buffer[--len] = 0; /* Remove backslash */
1220 }
1221 } /* Loop for reading multiple physical lines */
1222
1223 /* We now have a logical line. Test for the end of a configuration section (or,
1224 more accurately, for the start of the next section). Place the name of the next
1225 section in next_section, and return NULL. If the name given is longer than
1226 next_section, truncate it. It will be unrecognized later, because all the known
1227 section names do fit. Leave space for pluralizing. */
1228
1229 s = big_buffer + startoffset; /* First non-space character */
1230
1231 if (config_lines)
1232 save_config_line(s);
1233
1234 if (strncmpic(s, US"begin ", 6) == 0)
1235 {
1236 s += 6;
1237 while (isspace(*s)) s++;
1238 if (big_buffer + len - s > sizeof(next_section) - 2)
1239 s[sizeof(next_section) - 2] = 0;
1240 Ustrcpy(next_section, s);
1241 return NULL;
1242 }
1243
1244 /* Return the first non-blank character. */
1245
1246 return s;
1247 }
1248
1249
1250
1251 /*************************************************
1252 * Read a name *
1253 *************************************************/
1254
1255 /* The yield is the pointer to the next uschar. Names longer than the
1256 output space are silently truncated. This function is also used from acl.c when
1257 parsing ACLs.
1258
1259 Arguments:
1260 name where to put the name
1261 len length of name
1262 s input pointer
1263
1264 Returns: new input pointer
1265 */
1266
1267 uschar *
1268 readconf_readname(uschar *name, int len, uschar *s)
1269 {
1270 int p = 0;
1271 while (isspace(*s)) s++;
1272 if (isalpha(*s))
1273 {
1274 while (isalnum(*s) || *s == '_')
1275 {
1276 if (p < len-1) name[p++] = *s;
1277 s++;
1278 }
1279 }
1280 name[p] = 0;
1281 while (isspace(*s)) s++;
1282 return s;
1283 }
1284
1285
1286
1287
1288 /*************************************************
1289 * Read a time value *
1290 *************************************************/
1291
1292 /* This function is also called from outside, to read argument
1293 time values. The format of a time value is:
1294
1295 [<n>w][<n>d][<n>h][<n>m][<n>s]
1296
1297 as long as at least one is present. If a format error is encountered,
1298 return a negative value. The value must be terminated by the given
1299 terminator.
1300
1301 Arguments:
1302 s input pointer
1303 terminator required terminating character
1304 return_msec if TRUE, allow fractional seconds and return milliseconds
1305
1306 Returns: the time value, or -1 on syntax error
1307 value is seconds if return_msec is FALSE
1308 value is milliseconds if return_msec is TRUE
1309 */
1310
1311 int
1312 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1313 {
1314 int yield = 0;
1315 for (;;)
1316 {
1317 int value, count;
1318 double fraction;
1319
1320 if (!isdigit(*s)) return -1;
1321 (void)sscanf(CCS s, "%d%n", &value, &count);
1322 s += count;
1323
1324 switch (*s)
1325 {
1326 case 'w': value *= 7;
1327 case 'd': value *= 24;
1328 case 'h': value *= 60;
1329 case 'm': value *= 60;
1330 case 's': s++;
1331 break;
1332
1333 case '.':
1334 if (!return_msec) return -1;
1335 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1336 s += count;
1337 if (*s++ != 's') return -1;
1338 yield += (int)(fraction * 1000.0);
1339 break;
1340
1341 default: return -1;
1342 }
1343
1344 if (return_msec) value *= 1000;
1345 yield += value;
1346 if (*s == terminator) return yield;
1347 }
1348 /* Control never reaches here. */
1349 }
1350
1351
1352
1353 /*************************************************
1354 * Read a fixed point value *
1355 *************************************************/
1356
1357 /* The value is returned *1000
1358
1359 Arguments:
1360 s input pointer
1361 terminator required terminator
1362
1363 Returns: the value, or -1 on error
1364 */
1365
1366 static int
1367 readconf_readfixed(const uschar *s, int terminator)
1368 {
1369 int yield = 0;
1370 int value, count;
1371 if (!isdigit(*s)) return -1;
1372 (void)sscanf(CS s, "%d%n", &value, &count);
1373 s += count;
1374 yield = value * 1000;
1375 if (*s == '.')
1376 {
1377 int m = 100;
1378 while (isdigit((*(++s))))
1379 {
1380 yield += (*s - '0') * m;
1381 m /= 10;
1382 }
1383 }
1384
1385 return (*s == terminator)? yield : (-1);
1386 }
1387
1388
1389
1390 /*************************************************
1391 * Find option in list *
1392 *************************************************/
1393
1394 /* The lists are always in order, so binary chop can be used.
1395
1396 Arguments:
1397 name the option name to search for
1398 ol the first entry in the option list
1399 last one more than the offset of the last entry in the option list
1400
1401 Returns: pointer to an option entry, or NULL if not found
1402 */
1403
1404 static optionlist *
1405 find_option(uschar *name, optionlist *ol, int last)
1406 {
1407 int first = 0;
1408 while (last > first)
1409 {
1410 int middle = (first + last)/2;
1411 int c = Ustrcmp(name, ol[middle].name);
1412
1413 if (c == 0) return ol + middle;
1414 else if (c > 0) first = middle + 1;
1415 else last = middle;
1416 }
1417 return NULL;
1418 }
1419
1420
1421
1422 /*************************************************
1423 * Find a set flag in option list *
1424 *************************************************/
1425
1426 /* Because some versions of Unix make no restrictions on the values of uids and
1427 gids (even negative ones), we cannot represent "unset" by a special value.
1428 There is therefore a separate boolean variable for each one indicating whether
1429 a value is set or not. This function returns a pointer to the boolean, given
1430 the original option name. It is a major disaster if the flag cannot be found.
1431
1432 Arguments:
1433 name the name of the uid or gid option
1434 oltop points to the start of the relevant option list
1435 last one more than the offset of the last item in the option list
1436 data_block NULL when reading main options => data values in the option
1437 list are absolute addresses; otherwise they are byte offsets
1438 in data_block (used for driver options)
1439
1440 Returns: a pointer to the boolean flag.
1441 */
1442
1443 static BOOL *
1444 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1445 {
1446 optionlist *ol;
1447 uschar name2[64];
1448 sprintf(CS name2, "*set_%.50s", name);
1449 ol = find_option(name2, oltop, last);
1450 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1451 "Exim internal error: missing set flag for %s", name);
1452 return (data_block == NULL)? (BOOL *)(ol->value) :
1453 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1454 }
1455
1456
1457
1458
1459 /*************************************************
1460 * Output extra characters message and die *
1461 *************************************************/
1462
1463 /* Called when an option line has junk on the end. Sometimes this is because
1464 the sysadmin thinks comments are permitted.
1465
1466 Arguments:
1467 s points to the extra characters
1468 t1..t3 strings to insert in the log message
1469
1470 Returns: doesn't return; dies
1471 */
1472
1473 static void
1474 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1475 {
1476 uschar *comment = US"";
1477 if (*s == '#') comment = US" (# is comment only at line start)";
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1479 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1480 }
1481
1482
1483
1484 /*************************************************
1485 * Read rewrite information *
1486 *************************************************/
1487
1488 /* Each line of rewrite information contains:
1489
1490 . A complete address in the form user@domain, possibly with
1491 leading * for each part; or alternatively, a regex.
1492
1493 . A replacement string (which will be expanded).
1494
1495 . An optional sequence of one-letter flags, indicating which
1496 headers etc. to apply this rule to.
1497
1498 All this is decoded and placed into a control block. The OR of the flags is
1499 maintained in a common word.
1500
1501 Arguments:
1502 p points to the string that makes up the rule
1503 existflags points to the overall flag word
1504 isglobal TRUE if reading global rewrite rules
1505
1506 Returns: the control block for the parsed rule.
1507 */
1508
1509 static rewrite_rule *
1510 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1511 {
1512 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1513
1514 next->next = NULL;
1515 next->key = string_dequote(&p);
1516
1517 while (isspace(*p)) p++;
1518 if (*p == 0)
1519 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1520 "missing rewrite replacement string");
1521
1522 next->flags = 0;
1523 next->replacement = string_dequote(&p);
1524
1525 while (*p != 0) switch (*p++)
1526 {
1527 case ' ': case '\t': break;
1528
1529 case 'q': next->flags |= rewrite_quit; break;
1530 case 'w': next->flags |= rewrite_whole; break;
1531
1532 case 'h': next->flags |= rewrite_all_headers; break;
1533 case 's': next->flags |= rewrite_sender; break;
1534 case 'f': next->flags |= rewrite_from; break;
1535 case 't': next->flags |= rewrite_to; break;
1536 case 'c': next->flags |= rewrite_cc; break;
1537 case 'b': next->flags |= rewrite_bcc; break;
1538 case 'r': next->flags |= rewrite_replyto; break;
1539
1540 case 'E': next->flags |= rewrite_all_envelope; break;
1541 case 'F': next->flags |= rewrite_envfrom; break;
1542 case 'T': next->flags |= rewrite_envto; break;
1543
1544 case 'Q': next->flags |= rewrite_qualify; break;
1545 case 'R': next->flags |= rewrite_repeat; break;
1546
1547 case 'S':
1548 next->flags |= rewrite_smtp;
1549 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1551 "rewrite rule has the S flag but is not a regular expression");
1552 break;
1553
1554 default:
1555 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1556 "unknown rewrite flag character '%c' "
1557 "(could be missing quotes round replacement item)", p[-1]);
1558 break;
1559 }
1560
1561 /* If no action flags are set, set all the "normal" rewrites. */
1562
1563 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1564 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1565
1566 /* Remember which exist, for optimization, and return the rule */
1567
1568 *existflags |= next->flags;
1569 return next;
1570 }
1571
1572
1573
1574
1575 /*************************************************
1576 * Read global rewrite information *
1577 *************************************************/
1578
1579 /* Each line is a single rewrite rule; it is parsed into a control block
1580 by readconf_one_rewrite(), and its flags are ORed into the global flag
1581 word rewrite_existflags. */
1582
1583 void
1584 readconf_rewrites(void)
1585 {
1586 rewrite_rule **chain = &global_rewrite_rules;
1587 uschar *p;
1588
1589 while ((p = get_config_line()) != NULL)
1590 {
1591 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1592 *chain = next;
1593 chain = &(next->next);
1594 }
1595 }
1596
1597
1598
1599 /*************************************************
1600 * Read a string *
1601 *************************************************/
1602
1603 /* Strings are read into the normal store pool. As long we aren't too
1604 near the end of the current block, the string will just use what is necessary
1605 on the top of the stacking pool, because string_cat() uses the extension
1606 mechanism.
1607
1608 Argument:
1609 s the rest of the input line
1610 name the option name (for errors)
1611
1612 Returns: pointer to the string
1613 */
1614
1615 static uschar *
1616 read_string(const uschar *s, const uschar *name)
1617 {
1618 uschar *yield;
1619 const uschar *ss;
1620
1621 if (*s != '\"') return string_copy(s);
1622
1623 ss = s;
1624 yield = string_dequote(&s);
1625
1626 if (s == ss+1 || s[-1] != '\"')
1627 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1628 "missing quote at end of string value for %s", name);
1629
1630 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1631
1632 return yield;
1633 }
1634
1635
1636 /*************************************************
1637 * Custom-handler options *
1638 *************************************************/
1639 static void
1640 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1641 {
1642 if (*str == '$')
1643 smtp_receive_timeout_s = string_copy(str);
1644 else
1645 {
1646 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1647 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1648 if (smtp_receive_timeout < 0)
1649 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1650 name);
1651 }
1652 }
1653
1654 /*************************************************
1655 * Handle option line *
1656 *************************************************/
1657
1658 /* This function is called from several places to process a line containing the
1659 setting of an option. The first argument is the line to be decoded; it has been
1660 checked not to be empty and not to start with '#'. Trailing newlines and white
1661 space have been removed. The second argument is a pointer to the list of
1662 variable names that are to be recognized, together with their types and
1663 locations, and the third argument gives the number of entries in the list.
1664
1665 The fourth argument is a pointer to a data block. If it is NULL, then the data
1666 values in the options list are absolute addresses. Otherwise, they are byte
1667 offsets in the data block.
1668
1669 String option data may continue onto several lines; this function reads further
1670 data from config_file if necessary.
1671
1672 The yield of this function is normally zero. If a string continues onto
1673 multiple lines, then the data value is permitted to be followed by a comma
1674 or a semicolon (for use in drivers) and the yield is that character.
1675
1676 Arguments:
1677 buffer contains the configuration line to be handled
1678 oltop points to the start of the relevant option list
1679 last one more than the offset of the last item in the option list
1680 data_block NULL when reading main options => data values in the option
1681 list are absolute addresses; otherwise they are byte offsets
1682 in data_block when they have opt_public set; otherwise
1683 they are byte offsets in data_block->options_block.
1684 unknown_txt format string to use in panic message for unknown option;
1685 must contain %s for option name
1686 if given as NULL, don't panic on unknown option
1687
1688 Returns: TRUE if an option was read successfully,
1689 FALSE false for an unknown option if unknown_txt == NULL,
1690 otherwise panic and die on an unknown option
1691 */
1692
1693 static BOOL
1694 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1695 void *data_block, uschar *unknown_txt)
1696 {
1697 int ptr = 0;
1698 int offset = 0;
1699 int n, count, type, value;
1700 int issecure = 0;
1701 uid_t uid;
1702 gid_t gid;
1703 BOOL boolvalue = TRUE;
1704 BOOL freesptr = TRUE;
1705 optionlist *ol, *ol2;
1706 struct passwd *pw;
1707 void *reset_point;
1708 int intbase = 0;
1709 uschar *inttype = US"";
1710 uschar *sptr;
1711 uschar *s = buffer;
1712 uschar **str_target;
1713 uschar name[64];
1714 uschar name2[64];
1715
1716 /* There may be leading spaces; thereafter, we expect an option name starting
1717 with a letter. */
1718
1719 while (isspace(*s)) s++;
1720 if (!isalpha(*s))
1721 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1722
1723 /* Read the name of the option, and skip any subsequent white space. If
1724 it turns out that what we read was "hide", set the flag indicating that
1725 this is a secure option, and loop to read the next word. */
1726
1727 for (n = 0; n < 2; n++)
1728 {
1729 while (isalnum(*s) || *s == '_')
1730 {
1731 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1732 s++;
1733 }
1734 name[ptr] = 0;
1735 while (isspace(*s)) s++;
1736 if (Ustrcmp(name, "hide") != 0) break;
1737 issecure = opt_secure;
1738 ptr = 0;
1739 }
1740
1741 /* Deal with "no_" or "not_" here for booleans */
1742
1743 if (Ustrncmp(name, "no_", 3) == 0)
1744 {
1745 boolvalue = FALSE;
1746 offset = 3;
1747 }
1748
1749 if (Ustrncmp(name, "not_", 4) == 0)
1750 {
1751 boolvalue = FALSE;
1752 offset = 4;
1753 }
1754
1755 /* Search the list for the given name. A non-existent name, or an option that
1756 is set twice, is a disaster. */
1757
1758 if (!(ol = find_option(name + offset, oltop, last)))
1759 {
1760 if (unknown_txt == NULL) return FALSE;
1761 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1762 }
1763
1764 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1765 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1766 "\"%s\" option set for the second time", name);
1767
1768 ol->type |= opt_set | issecure;
1769 type = ol->type & opt_mask;
1770
1771 /* Types with data values must be followed by '='; the "no[t]_" prefix
1772 applies only to boolean values. */
1773
1774 if (type < opt_bool || type > opt_bool_last)
1775 {
1776 if (offset != 0)
1777 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1778 "negation prefix applied to a non-boolean option");
1779 if (*s == 0)
1780 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1781 "unexpected end of line (data missing) after %s", name);
1782 if (*s != '=')
1783 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1784 }
1785
1786 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1787 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1788 ultimately expands to one of those values. */
1789
1790 else if (*s != 0 && (offset != 0 || *s != '='))
1791 extra_chars_error(s, US"boolean option ", name, US"");
1792
1793 /* Skip white space after = */
1794
1795 if (*s == '=') while (isspace((*(++s))));
1796
1797 /* If there is a data block and the opt_public flag is not set, change
1798 the data block pointer to the private options block. */
1799
1800 if (data_block != NULL && (ol->type & opt_public) == 0)
1801 data_block = (void *)(((driver_instance *)data_block)->options_block);
1802
1803 /* Now get the data according to the type. */
1804
1805 switch (type)
1806 {
1807 /* If a string value is not enclosed in quotes, it consists of
1808 the rest of the current line, verbatim. Otherwise, string escapes
1809 are processed.
1810
1811 A transport is specified as a string, which is then looked up in the
1812 list of transports. A search type is specified as one of a number of
1813 known strings.
1814
1815 A set or rewrite rules for a driver is specified as a string, which is
1816 then parsed into a suitable chain of control blocks.
1817
1818 Uids and gids are specified as strings which are then looked up in the
1819 passwd file. Lists of uids and gids are similarly specified as colon-
1820 separated strings. */
1821
1822 case opt_stringptr:
1823 case opt_uid:
1824 case opt_gid:
1825 case opt_expand_uid:
1826 case opt_expand_gid:
1827 case opt_uidlist:
1828 case opt_gidlist:
1829 case opt_rewrite:
1830
1831 reset_point = sptr = read_string(s, name);
1832
1833 /* Having read a string, we now have several different ways of using it,
1834 depending on the data type, so do another switch. If keeping the actual
1835 string is not required (because it is interpreted), freesptr is set TRUE,
1836 and at the end we reset the pool. */
1837
1838 switch (type)
1839 {
1840 /* If this was a string, set the variable to point to the new string,
1841 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1842 rules, we still keep the string (for printing), and parse the rules into a
1843 control block and flags word. */
1844
1845 case opt_stringptr:
1846 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1847 : USS (ol->value);
1848 if (ol->type & opt_rep_con)
1849 {
1850 uschar * saved_condition;
1851 /* We already have a condition, we're conducting a crude hack to let
1852 multiple condition rules be chained together, despite storing them in
1853 text form. */
1854 *str_target = string_copy_malloc( (saved_condition = *str_target)
1855 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1856 saved_condition, sptr)
1857 : sptr);
1858 /* TODO(pdp): there is a memory leak here and just below
1859 when we set 3 or more conditions; I still don't
1860 understand the store mechanism enough to know
1861 what's the safe way to free content from an earlier store.
1862 AFAICT, stores stack, so freeing an early stored item also stores
1863 all data alloc'd after it. If we knew conditions were adjacent,
1864 we could survive that, but we don't. So I *think* we need to take
1865 another bit from opt_type to indicate "malloced"; this seems like
1866 quite a hack, especially for this one case. It also means that
1867 we can't ever reclaim the store from the *first* condition.
1868
1869 Because we only do this once, near process start-up, I'm prepared to
1870 let this slide for the time being, even though it rankles. */
1871 }
1872 else if (ol->type & opt_rep_str)
1873 {
1874 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1875 int sep_i = -(int)sep_o;
1876 const uschar * list = sptr;
1877 uschar * s;
1878 uschar * list_o = *str_target;
1879
1880 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1881 list_o = string_append_listele(list_o, sep_o, s);
1882 if (list_o)
1883 *str_target = string_copy_malloc(list_o);
1884 }
1885 else
1886 {
1887 *str_target = sptr;
1888 freesptr = FALSE;
1889 }
1890 break;
1891
1892 case opt_rewrite:
1893 if (data_block)
1894 *USS (US data_block + (long int)(ol->value)) = sptr;
1895 else
1896 *USS (ol->value) = sptr;
1897 freesptr = FALSE;
1898 if (type == opt_rewrite)
1899 {
1900 int sep = 0;
1901 int *flagptr;
1902 uschar *p = sptr;
1903 rewrite_rule **chain;
1904 optionlist *ol3;
1905
1906 sprintf(CS name2, "*%.50s_rules", name);
1907 ol2 = find_option(name2, oltop, last);
1908 sprintf(CS name2, "*%.50s_flags", name);
1909 ol3 = find_option(name2, oltop, last);
1910
1911 if (ol2 == NULL || ol3 == NULL)
1912 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1913 "rewrite rules not available for driver");
1914
1915 if (data_block == NULL)
1916 {
1917 chain = (rewrite_rule **)(ol2->value);
1918 flagptr = (int *)(ol3->value);
1919 }
1920 else
1921 {
1922 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1923 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1924 }
1925
1926 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1927 {
1928 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1929 *chain = next;
1930 chain = &(next->next);
1931 }
1932
1933 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1934 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1935 "non-header rewrite - not allowed at transport time -");
1936 }
1937 break;
1938
1939 /* If it was an expanded uid, see if there is any expansion to be
1940 done by checking for the presence of a $ character. If there is, save it
1941 in the corresponding *expand_user option field. Otherwise, fall through
1942 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1943 of data. */
1944
1945 case opt_expand_uid:
1946 sprintf(CS name2, "*expand_%.50s", name);
1947 ol2 = find_option(name2, oltop, last);
1948 if (ol2 != NULL)
1949 {
1950 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1951
1952 if (data_block == NULL)
1953 *((uschar **)(ol2->value)) = ss;
1954 else
1955 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1956
1957 if (ss != NULL)
1958 {
1959 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1960 freesptr = FALSE;
1961 break;
1962 }
1963 }
1964
1965 /* Look up a fixed uid, and also make use of the corresponding gid
1966 if a passwd entry is returned and the gid has not been set. */
1967
1968 case opt_uid:
1969 if (!route_finduser(sptr, &pw, &uid))
1970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1971 if (data_block == NULL)
1972 *((uid_t *)(ol->value)) = uid;
1973 else
1974 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1975
1976 /* Set the flag indicating a fixed value is set */
1977
1978 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1979
1980 /* Handle matching gid if we have a passwd entry: done by finding the
1981 same name with terminating "user" changed to "group"; if not found,
1982 ignore. Also ignore if the value is already set. */
1983
1984 if (pw == NULL) break;
1985 Ustrcpy(name+Ustrlen(name)-4, "group");
1986 ol2 = find_option(name, oltop, last);
1987 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1988 (ol2->type & opt_mask) == opt_expand_gid))
1989 {
1990 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1991 if (! *set_flag)
1992 {
1993 if (data_block == NULL)
1994 *((gid_t *)(ol2->value)) = pw->pw_gid;
1995 else
1996 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1997 *set_flag = TRUE;
1998 }
1999 }
2000 break;
2001
2002 /* If it was an expanded gid, see if there is any expansion to be
2003 done by checking for the presence of a $ character. If there is, save it
2004 in the corresponding *expand_user option field. Otherwise, fall through
2005 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
2006 of data. */
2007
2008 case opt_expand_gid:
2009 sprintf(CS name2, "*expand_%.50s", name);
2010 ol2 = find_option(name2, oltop, last);
2011 if (ol2 != NULL)
2012 {
2013 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
2014
2015 if (data_block == NULL)
2016 *((uschar **)(ol2->value)) = ss;
2017 else
2018 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
2019
2020 if (ss != NULL)
2021 {
2022 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2023 freesptr = FALSE;
2024 break;
2025 }
2026 }
2027
2028 /* Handle freestanding gid */
2029
2030 case opt_gid:
2031 if (!route_findgroup(sptr, &gid))
2032 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2033 if (data_block == NULL)
2034 *((gid_t *)(ol->value)) = gid;
2035 else
2036 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
2037 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2038 break;
2039
2040 /* If it was a uid list, look up each individual entry, and build
2041 a vector of uids, with a count in the first element. Put the vector
2042 in malloc store so we can free the string. (We are reading into
2043 permanent store already.) */
2044
2045 case opt_uidlist:
2046 {
2047 int count = 1;
2048 uid_t *list;
2049 int ptr = 0;
2050 const uschar *p;
2051 const uschar *op = expand_string (sptr);
2052
2053 if (op == NULL)
2054 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2055 name, expand_string_message);
2056
2057 p = op;
2058 if (*p != 0) count++;
2059 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2060 list = store_malloc(count*sizeof(uid_t));
2061 list[ptr++] = (uid_t)(count - 1);
2062
2063 if (data_block == NULL)
2064 *((uid_t **)(ol->value)) = list;
2065 else
2066 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2067
2068 p = op;
2069 while (count-- > 1)
2070 {
2071 int sep = 0;
2072 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2073 if (!route_finduser(big_buffer, NULL, &uid))
2074 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2075 big_buffer);
2076 list[ptr++] = uid;
2077 }
2078 }
2079 break;
2080
2081 /* If it was a gid list, look up each individual entry, and build
2082 a vector of gids, with a count in the first element. Put the vector
2083 in malloc store so we can free the string. (We are reading into permanent
2084 store already.) */
2085
2086 case opt_gidlist:
2087 {
2088 int count = 1;
2089 gid_t *list;
2090 int ptr = 0;
2091 const uschar *p;
2092 const uschar *op = expand_string (sptr);
2093
2094 if (op == NULL)
2095 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2096 name, expand_string_message);
2097
2098 p = op;
2099 if (*p != 0) count++;
2100 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2101 list = store_malloc(count*sizeof(gid_t));
2102 list[ptr++] = (gid_t)(count - 1);
2103
2104 if (data_block == NULL)
2105 *((gid_t **)(ol->value)) = list;
2106 else
2107 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2108
2109 p = op;
2110 while (count-- > 1)
2111 {
2112 int sep = 0;
2113 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2114 if (!route_findgroup(big_buffer, &gid))
2115 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2116 big_buffer);
2117 list[ptr++] = gid;
2118 }
2119 }
2120 break;
2121 }
2122
2123 /* Release store if the value of the string doesn't need to be kept. */
2124
2125 if (freesptr) store_reset(reset_point);
2126 break;
2127
2128 /* Expanded boolean: if no characters follow, or if there are no dollar
2129 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2130 save the string for later expansion in the alternate place. */
2131
2132 case opt_expand_bool:
2133 if (*s != 0 && Ustrchr(s, '$') != 0)
2134 {
2135 sprintf(CS name2, "*expand_%.50s", name);
2136 ol2 = find_option(name2, oltop, last);
2137 if (ol2 != NULL)
2138 {
2139 reset_point = sptr = read_string(s, name);
2140 if (data_block == NULL)
2141 *((uschar **)(ol2->value)) = sptr;
2142 else
2143 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
2144 freesptr = FALSE;
2145 break;
2146 }
2147 }
2148 /* Fall through */
2149
2150 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2151 look for yes/not/true/false. Some booleans are stored in a single bit in
2152 a single int. There's a special fudge for verify settings; without a suffix
2153 they set both xx_sender and xx_recipient. The table points to the sender
2154 value; search subsequently for the recipient. There's another special case:
2155 opt_bool_set also notes when a boolean has been set. */
2156
2157 case opt_bool:
2158 case opt_bit:
2159 case opt_bool_verify:
2160 case opt_bool_set:
2161 if (*s != 0)
2162 {
2163 s = readconf_readname(name2, 64, s);
2164 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2165 boolvalue = TRUE;
2166 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2167 boolvalue = FALSE;
2168 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2169 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2170 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2171 US"for boolean option ", name);
2172 }
2173
2174 /* Handle single-bit type. */
2175
2176 if (type == opt_bit)
2177 {
2178 int bit = 1 << ((ol->type >> 16) & 31);
2179 int *ptr = (data_block == NULL)?
2180 (int *)(ol->value) :
2181 (int *)((uschar *)data_block + (long int)ol->value);
2182 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2183 break;
2184 }
2185
2186 /* Handle full BOOL types */
2187
2188 if (data_block == NULL)
2189 *((BOOL *)(ol->value)) = boolvalue;
2190 else
2191 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
2192
2193 /* Verify fudge */
2194
2195 if (type == opt_bool_verify)
2196 {
2197 sprintf(CS name2, "%.50s_recipient", name + offset);
2198 ol2 = find_option(name2, oltop, last);
2199 if (ol2 != NULL)
2200 {
2201 if (data_block == NULL)
2202 *((BOOL *)(ol2->value)) = boolvalue;
2203 else
2204 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
2205 }
2206 }
2207
2208 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2209
2210 else if (type == opt_bool_set)
2211 {
2212 sprintf(CS name2, "*set_%.50s", name + offset);
2213 ol2 = find_option(name2, oltop, last);
2214 if (ol2 != NULL)
2215 {
2216 if (data_block == NULL)
2217 *((BOOL *)(ol2->value)) = TRUE;
2218 else
2219 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
2220 }
2221 }
2222 break;
2223
2224 /* Octal integer */
2225
2226 case opt_octint:
2227 intbase = 8;
2228 inttype = US"octal ";
2229
2230 /* Integer: a simple(ish) case; allow octal and hex formats, and
2231 suffixes K, M and G. The different types affect output, not input. */
2232
2233 case opt_mkint:
2234 case opt_int:
2235 {
2236 uschar *endptr;
2237 long int lvalue;
2238
2239 errno = 0;
2240 lvalue = strtol(CS s, CSS &endptr, intbase);
2241
2242 if (endptr == s)
2243 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2244 inttype, name);
2245
2246 if (errno != ERANGE)
2247 if (tolower(*endptr) == 'k')
2248 {
2249 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2250 else lvalue *= 1024;
2251 endptr++;
2252 }
2253 else if (tolower(*endptr) == 'm')
2254 {
2255 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2256 errno = ERANGE;
2257 else lvalue *= 1024*1024;
2258 endptr++;
2259 }
2260 else if (tolower(*endptr) == 'g')
2261 {
2262 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2263 errno = ERANGE;
2264 else lvalue *= 1024*1024*1024;
2265 endptr++;
2266 }
2267
2268 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2269 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2270 "absolute value of integer \"%s\" is too large (overflow)", s);
2271
2272 while (isspace(*endptr)) endptr++;
2273 if (*endptr != 0)
2274 extra_chars_error(endptr, inttype, US"integer value for ", name);
2275
2276 value = (int)lvalue;
2277 }
2278
2279 if (data_block == NULL)
2280 *((int *)(ol->value)) = value;
2281 else
2282 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2283 break;
2284
2285 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2286 and G. */
2287 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2288
2289 case opt_Kint:
2290 {
2291 uschar *endptr;
2292 errno = 0;
2293 value = strtol(CS s, CSS &endptr, intbase);
2294
2295 if (endptr == s)
2296 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2297 inttype, name);
2298
2299 if (errno != ERANGE)
2300 if (tolower(*endptr) == 'g')
2301 {
2302 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2303 errno = ERANGE;
2304 else
2305 value *= 1024*1024;
2306 endptr++;
2307 }
2308 else if (tolower(*endptr) == 'm')
2309 {
2310 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2311 errno = ERANGE;
2312 else
2313 value *= 1024;
2314 endptr++;
2315 }
2316 else if (tolower(*endptr) == 'k')
2317 endptr++;
2318 else
2319 value = (value + 512)/1024;
2320
2321 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2322 "absolute value of integer \"%s\" is too large (overflow)", s);
2323
2324 while (isspace(*endptr)) endptr++;
2325 if (*endptr != 0)
2326 extra_chars_error(endptr, inttype, US"integer value for ", name);
2327 }
2328
2329 if (data_block == NULL)
2330 *((int *)(ol->value)) = value;
2331 else
2332 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2333 break;
2334
2335 /* Fixed-point number: held to 3 decimal places. */
2336
2337 case opt_fixed:
2338 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2339 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2340 "fixed-point number expected for %s", name);
2341
2342 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2343 "integer \"%s\" is too large (overflow)", s);
2344
2345 value *= 1000;
2346
2347 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2348 "integer \"%s\" is too large (overflow)", s);
2349
2350 /* We get a coverity error here for using count, as it derived
2351 from the tainted buffer pointed to by s, as parsed by sscanf().
2352 By the definition of sscanf we must be aceessing between start
2353 and end of s (assuming it is nul-terminated...) so ignore the error. */
2354 /* coverity[tainted_data] */
2355 if (s[count] == '.')
2356 {
2357 int d = 100;
2358 while (isdigit(s[++count]))
2359 {
2360 value += (s[count] - '0') * d;
2361 d /= 10;
2362 }
2363 }
2364
2365 while (isspace(s[count])) count++;
2366
2367 if (s[count] != 0)
2368 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2369
2370 if (data_block == NULL)
2371 *((int *)(ol->value)) = value;
2372 else
2373 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2374 break;
2375
2376 /* There's a special routine to read time values. */
2377
2378 case opt_time:
2379 value = readconf_readtime(s, 0, FALSE);
2380 if (value < 0)
2381 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2382 name);
2383 if (data_block == NULL)
2384 *((int *)(ol->value)) = value;
2385 else
2386 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2387 break;
2388
2389 /* A time list is a list of colon-separated times, with the first
2390 element holding the size of the list and the second the number of
2391 entries used. */
2392
2393 case opt_timelist:
2394 {
2395 int count = 0;
2396 int *list = (data_block == NULL)?
2397 (int *)(ol->value) :
2398 (int *)((uschar *)data_block + (long int)(ol->value));
2399
2400 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2401 {
2402 int terminator = 0;
2403 uschar *snext = Ustrchr(s, ':');
2404 if (snext != NULL)
2405 {
2406 uschar *ss = snext;
2407 while (ss > s && isspace(ss[-1])) ss--;
2408 terminator = *ss;
2409 }
2410 value = readconf_readtime(s, terminator, FALSE);
2411 if (value < 0)
2412 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2413 name);
2414 if (count > 1 && value <= list[count])
2415 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2416 "time value out of order for %s", name);
2417 list[count+1] = value;
2418 if (snext == NULL) break;
2419 s = snext + 1;
2420 while (isspace(*s)) s++;
2421 }
2422
2423 if (count > list[0] - 2)
2424 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2425 name);
2426 if (count > 0 && list[2] == 0) count = 0;
2427 list[1] = count;
2428 break;
2429 }
2430
2431 case opt_func:
2432 {
2433 void (*fn)() = ol->value;
2434 fn(name, s);
2435 break;
2436 }
2437 }
2438
2439 return TRUE;
2440 }
2441
2442
2443
2444 /*************************************************
2445 * Print a time value *
2446 *************************************************/
2447
2448 /*
2449 Argument: a time value in seconds
2450 Returns: pointer to a fixed buffer containing the time as a string,
2451 in readconf_readtime() format
2452 */
2453
2454 uschar *
2455 readconf_printtime(int t)
2456 {
2457 int s, m, h, d, w;
2458 uschar *p = time_buffer;
2459
2460 if (t < 0)
2461 {
2462 *p++ = '-';
2463 t = -t;
2464 }
2465
2466 s = t % 60;
2467 t /= 60;
2468 m = t % 60;
2469 t /= 60;
2470 h = t % 24;
2471 t /= 24;
2472 d = t % 7;
2473 w = t/7;
2474
2475 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2476 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2477 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2478 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2479 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2480
2481 return time_buffer;
2482 }
2483
2484
2485
2486 /*************************************************
2487 * Print an individual option value *
2488 *************************************************/
2489
2490 /* This is used by the -bP option, so prints to the standard output.
2491 The entire options list is passed in as an argument, because some options come
2492 in pairs - typically uid/gid settings, which can either be explicit numerical
2493 values, or strings to be expanded later. If the numerical value is unset,
2494 search for "*expand_<name>" to see if there is a string equivalent.
2495
2496 Arguments:
2497 ol option entry, or NULL for an unknown option
2498 name option name
2499 options_block NULL for main configuration options; otherwise points to
2500 a driver block; if the option doesn't have opt_public
2501 set, then options_block->options_block is where the item
2502 resides.
2503 oltop points to the option list in which ol exists
2504 last one more than the offset of the last entry in optop
2505 no_labels do not show "foo = " at the start.
2506
2507 Returns: nothing
2508 */
2509
2510 static void
2511 print_ol(optionlist *ol, uschar *name, void *options_block,
2512 optionlist *oltop, int last, BOOL no_labels)
2513 {
2514 struct passwd *pw;
2515 struct group *gr;
2516 optionlist *ol2;
2517 void *value;
2518 uid_t *uidlist;
2519 gid_t *gidlist;
2520 uschar *s;
2521 uschar name2[64];
2522
2523 if (ol == NULL)
2524 {
2525 printf("%s is not a known option\n", name);
2526 return;
2527 }
2528
2529 /* Non-admin callers cannot see options that have been flagged secure by the
2530 "hide" prefix. */
2531
2532 if (!admin_user && (ol->type & opt_secure) != 0)
2533 {
2534 if (no_labels)
2535 printf("%s\n", hidden);
2536 else
2537 printf("%s = %s\n", name, hidden);
2538 return;
2539 }
2540
2541 /* Else show the value of the option */
2542
2543 value = ol->value;
2544 if (options_block != NULL)
2545 {
2546 if ((ol->type & opt_public) == 0)
2547 options_block = (void *)(((driver_instance *)options_block)->options_block);
2548 value = (void *)((uschar *)options_block + (long int)value);
2549 }
2550
2551 switch(ol->type & opt_mask)
2552 {
2553 case opt_stringptr:
2554 case opt_rewrite: /* Show the text value */
2555 s = *((uschar **)value);
2556 if (!no_labels) printf("%s = ", name);
2557 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2558 break;
2559
2560 case opt_int:
2561 if (!no_labels) printf("%s = ", name);
2562 printf("%d\n", *((int *)value));
2563 break;
2564
2565 case opt_mkint:
2566 {
2567 int x = *((int *)value);
2568 if (x != 0 && (x & 1023) == 0)
2569 {
2570 int c = 'K';
2571 x >>= 10;
2572 if ((x & 1023) == 0)
2573 {
2574 c = 'M';
2575 x >>= 10;
2576 }
2577 if (!no_labels) printf("%s = ", name);
2578 printf("%d%c\n", x, c);
2579 }
2580 else
2581 {
2582 if (!no_labels) printf("%s = ", name);
2583 printf("%d\n", x);
2584 }
2585 }
2586 break;
2587
2588 case opt_Kint:
2589 {
2590 int x = *((int *)value);
2591 if (!no_labels) printf("%s = ", name);
2592 if (x == 0) printf("0\n");
2593 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2594 else printf("%dK\n", x);
2595 }
2596 break;
2597
2598 case opt_octint:
2599 if (!no_labels) printf("%s = ", name);
2600 printf("%#o\n", *((int *)value));
2601 break;
2602
2603 /* Can be negative only when "unset", in which case integer */
2604
2605 case opt_fixed:
2606 {
2607 int x = *((int *)value);
2608 int f = x % 1000;
2609 int d = 100;
2610 if (x < 0) printf("%s =\n", name); else
2611 {
2612 if (!no_labels) printf("%s = ", name);
2613 printf("%d.", x/1000);
2614 do
2615 {
2616 printf("%d", f/d);
2617 f %= d;
2618 d /= 10;
2619 }
2620 while (f != 0);
2621 printf("\n");
2622 }
2623 }
2624 break;
2625
2626 /* If the numerical value is unset, try for the string value */
2627
2628 case opt_expand_uid:
2629 if (! *get_set_flag(name, oltop, last, options_block))
2630 {
2631 sprintf(CS name2, "*expand_%.50s", name);
2632 ol2 = find_option(name2, oltop, last);
2633 if (ol2 != NULL)
2634 {
2635 void *value2 = ol2->value;
2636 if (options_block != NULL)
2637 value2 = (void *)((uschar *)options_block + (long int)value2);
2638 s = *((uschar **)value2);
2639 if (!no_labels) printf("%s = ", name);
2640 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2641 break;
2642 }
2643 }
2644
2645 /* Else fall through */
2646
2647 case opt_uid:
2648 if (!no_labels) printf("%s = ", name);
2649 if (! *get_set_flag(name, oltop, last, options_block))
2650 printf("\n");
2651 else
2652 {
2653 pw = getpwuid(*((uid_t *)value));
2654 if (pw == NULL)
2655 printf("%ld\n", (long int)(*((uid_t *)value)));
2656 else printf("%s\n", pw->pw_name);
2657 }
2658 break;
2659
2660 /* If the numerical value is unset, try for the string value */
2661
2662 case opt_expand_gid:
2663 if (! *get_set_flag(name, oltop, last, options_block))
2664 {
2665 sprintf(CS name2, "*expand_%.50s", name);
2666 ol2 = find_option(name2, oltop, last);
2667 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2668 {
2669 void *value2 = ol2->value;
2670 if (options_block != NULL)
2671 value2 = (void *)((uschar *)options_block + (long int)value2);
2672 s = *((uschar **)value2);
2673 if (!no_labels) printf("%s = ", name);
2674 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2675 break;
2676 }
2677 }
2678
2679 /* Else fall through */
2680
2681 case opt_gid:
2682 if (!no_labels) printf("%s = ", name);
2683 if (! *get_set_flag(name, oltop, last, options_block))
2684 printf("\n");
2685 else
2686 {
2687 gr = getgrgid(*((int *)value));
2688 if (gr == NULL)
2689 printf("%ld\n", (long int)(*((int *)value)));
2690 else printf("%s\n", gr->gr_name);
2691 }
2692 break;
2693
2694 case opt_uidlist:
2695 uidlist = *((uid_t **)value);
2696 if (!no_labels) printf("%s =", name);
2697 if (uidlist != NULL)
2698 {
2699 int i;
2700 uschar sep = ' ';
2701 if (no_labels) sep = '\0';
2702 for (i = 1; i <= (int)(uidlist[0]); i++)
2703 {
2704 uschar *name = NULL;
2705 pw = getpwuid(uidlist[i]);
2706 if (pw != NULL) name = US pw->pw_name;
2707 if (sep != '\0') printf("%c", sep);
2708 if (name != NULL) printf("%s", name);
2709 else printf("%ld", (long int)(uidlist[i]));
2710 sep = ':';
2711 }
2712 }
2713 printf("\n");
2714 break;
2715
2716 case opt_gidlist:
2717 gidlist = *((gid_t **)value);
2718 if (!no_labels) printf("%s =", name);
2719 if (gidlist != NULL)
2720 {
2721 int i;
2722 uschar sep = ' ';
2723 if (no_labels) sep = '\0';
2724 for (i = 1; i <= (int)(gidlist[0]); i++)
2725 {
2726 uschar *name = NULL;
2727 gr = getgrgid(gidlist[i]);
2728 if (gr != NULL) name = US gr->gr_name;
2729 if (sep != '\0') printf("%c", sep);
2730 if (name != NULL) printf("%s", name);
2731 else printf("%ld", (long int)(gidlist[i]));
2732 sep = ':';
2733 }
2734 }
2735 printf("\n");
2736 break;
2737
2738 case opt_time:
2739 if (!no_labels) printf("%s = ", name);
2740 printf("%s\n", readconf_printtime(*((int *)value)));
2741 break;
2742
2743 case opt_timelist:
2744 {
2745 int i;
2746 int *list = (int *)value;
2747 if (!no_labels) printf("%s = ", name);
2748 for (i = 0; i < list[1]; i++)
2749 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2750 printf("\n");
2751 }
2752 break;
2753
2754 case opt_bit:
2755 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2756 "" : "no_", name);
2757 break;
2758
2759 case opt_expand_bool:
2760 sprintf(CS name2, "*expand_%.50s", name);
2761 ol2 = find_option(name2, oltop, last);
2762 if (ol2 != NULL && ol2->value != NULL)
2763 {
2764 void *value2 = ol2->value;
2765 if (options_block != NULL)
2766 value2 = (void *)((uschar *)options_block + (long int)value2);
2767 s = *((uschar **)value2);
2768 if (s != NULL)
2769 {
2770 if (!no_labels) printf("%s = ", name);
2771 printf("%s\n", string_printing(s));
2772 break;
2773 }
2774 /* s == NULL => string not set; fall through */
2775 }
2776
2777 /* Fall through */
2778
2779 case opt_bool:
2780 case opt_bool_verify:
2781 case opt_bool_set:
2782 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2783 break;
2784 }
2785 }
2786
2787
2788
2789 /*************************************************
2790 * Print value from main configuration *
2791 *************************************************/
2792
2793 /* This function, called as a result of encountering the -bP option,
2794 causes the value of any main configuration variable to be output if the
2795 second argument is NULL. There are some special values:
2796
2797 all print all main configuration options
2798 config_file print the name of the configuration file
2799 (configure_file will still work, for backward
2800 compatibility)
2801 routers print the routers' configurations
2802 transports print the transports' configuration
2803 authenticators print the authenticators' configuration
2804 macros print the macros' configuration
2805 router_list print a list of router names
2806 transport_list print a list of transport names
2807 authenticator_list print a list of authentication mechanism names
2808 macro_list print a list of macro names
2809 +name print a named list item
2810 local_scan print the local_scan options
2811 config print the configuration as it is parsed
2812 environment print the used execution environment
2813
2814 If the second argument is not NULL, it must be one of "router", "transport",
2815 "authenticator" or "macro" in which case the first argument identifies the
2816 driver whose options are to be printed.
2817
2818 Arguments:
2819 name option name if type == NULL; else driver name
2820 type NULL or driver type name, as described above
2821 no_labels avoid the "foo = " at the start of an item
2822
2823 Returns: nothing
2824 */
2825
2826 void
2827 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2828 {
2829 BOOL names_only = FALSE;
2830 optionlist *ol;
2831 optionlist *ol2 = NULL;
2832 driver_instance *d = NULL;
2833 macro_item *m;
2834 int size = 0;
2835
2836 if (type == NULL)
2837 {
2838 if (*name == '+')
2839 {
2840 int i;
2841 tree_node *t;
2842 BOOL found = FALSE;
2843 static uschar *types[] = { US"address", US"domain", US"host",
2844 US"localpart" };
2845 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2846 &hostlist_anchor, &localpartlist_anchor };
2847
2848 for (i = 0; i < 4; i++)
2849 {
2850 t = tree_search(*(anchors[i]), name+1);
2851 if (t != NULL)
2852 {
2853 found = TRUE;
2854 if (no_labels)
2855 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2856 else
2857 printf("%slist %s = %s\n", types[i], name+1,
2858 ((namedlist_block *)(t->data.ptr))->string);
2859 }
2860 }
2861
2862 if (!found)
2863 printf("no address, domain, host, or local part list called \"%s\" "
2864 "exists\n", name+1);
2865
2866 return;
2867 }
2868
2869 if ( Ustrcmp(name, "configure_file") == 0
2870 || Ustrcmp(name, "config_file") == 0)
2871 {
2872 printf("%s\n", CS config_main_filename);
2873 return;
2874 }
2875
2876 if (Ustrcmp(name, "all") == 0)
2877 {
2878 for (ol = optionlist_config;
2879 ol < optionlist_config + nelem(optionlist_config); ol++)
2880 {
2881 if ((ol->type & opt_hidden) == 0)
2882 print_ol(ol, US ol->name, NULL,
2883 optionlist_config, nelem(optionlist_config),
2884 no_labels);
2885 }
2886 return;
2887 }
2888
2889 if (Ustrcmp(name, "local_scan") == 0)
2890 {
2891 #ifndef LOCAL_SCAN_HAS_OPTIONS
2892 printf("local_scan() options are not supported\n");
2893 #else
2894 for (ol = local_scan_options;
2895 ol < local_scan_options + local_scan_options_count; ol++)
2896 {
2897 print_ol(ol, US ol->name, NULL, local_scan_options,
2898 local_scan_options_count, no_labels);
2899 }
2900 #endif
2901 return;
2902 }
2903
2904 if (Ustrcmp(name, "config") == 0)
2905 {
2906 print_config(admin_user, no_labels);
2907 return;
2908 }
2909
2910 if (Ustrcmp(name, "routers") == 0)
2911 {
2912 type = US"router";
2913 name = NULL;
2914 }
2915 else if (Ustrcmp(name, "transports") == 0)
2916 {
2917 type = US"transport";
2918 name = NULL;
2919 }
2920
2921 else if (Ustrcmp(name, "authenticators") == 0)
2922 {
2923 type = US"authenticator";
2924 name = NULL;
2925 }
2926
2927 else if (Ustrcmp(name, "macros") == 0)
2928 {
2929 type = US"macro";
2930 name = NULL;
2931 }
2932
2933 else if (Ustrcmp(name, "router_list") == 0)
2934 {
2935 type = US"router";
2936 name = NULL;
2937 names_only = TRUE;
2938 }
2939
2940 else if (Ustrcmp(name, "transport_list") == 0)
2941 {
2942 type = US"transport";
2943 name = NULL;
2944 names_only = TRUE;
2945 }
2946
2947 else if (Ustrcmp(name, "authenticator_list") == 0)
2948 {
2949 type = US"authenticator";
2950 name = NULL;
2951 names_only = TRUE;
2952 }
2953
2954 else if (Ustrcmp(name, "macro_list") == 0)
2955 {
2956 type = US"macro";
2957 name = NULL;
2958 names_only = TRUE;
2959 }
2960
2961 else if (Ustrcmp(name, "environment") == 0)
2962 {
2963 if (environ)
2964 {
2965 uschar ** p;
2966 for (p = USS environ; *p; p++) ;
2967 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2968
2969 for (p = USS environ; *p; p++)
2970 {
2971 uschar * q;
2972 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2973 puts(CS *p);
2974 }
2975 }
2976 return;
2977 }
2978
2979 else
2980 {
2981 print_ol(find_option(name, optionlist_config, nelem(optionlist_config)),
2982 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2983 return;
2984 }
2985 }
2986
2987 /* Handle the options for a router or transport. Skip options that are flagged
2988 as hidden. Some of these are options with names starting with '*', used for
2989 internal alternative representations of other options (which the printing
2990 function will sort out). Others are synonyms kept for backward compatibility.
2991 */
2992
2993 if (Ustrcmp(type, "router") == 0)
2994 {
2995 d = (driver_instance *)routers;
2996 ol2 = optionlist_routers;
2997 size = optionlist_routers_size;
2998 }
2999 else if (Ustrcmp(type, "transport") == 0)
3000 {
3001 d = (driver_instance *)transports;
3002 ol2 = optionlist_transports;
3003 size = optionlist_transports_size;
3004 }
3005 else if (Ustrcmp(type, "authenticator") == 0)
3006 {
3007 d = (driver_instance *)auths;
3008 ol2 = optionlist_auths;
3009 size = optionlist_auths_size;
3010 }
3011
3012 else if (Ustrcmp(type, "macro") == 0)
3013 {
3014 /* People store passwords in macros and they were previously not available
3015 for printing. So we have an admin_users restriction. */
3016 if (!admin_user)
3017 {
3018 fprintf(stderr, "exim: permission denied\n");
3019 exit(EXIT_FAILURE);
3020 }
3021 if (!macros_builtin_created) macros_create_builtin();
3022 for (m = macros; m; m = m->next)
3023 if (!name || Ustrcmp(name, m->name) == 0)
3024 {
3025 if (names_only)
3026 printf("%s\n", CS m->name);
3027 else
3028 printf("%s=%s\n", CS m->name, CS m->replacement);
3029 if (name)
3030 return;
3031 }
3032 if (name)
3033 printf("%s %s not found\n", type, name);
3034 return;
3035 }
3036
3037 if (names_only)
3038 {
3039 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
3040 return;
3041 }
3042
3043 /* Either search for a given driver, or print all of them */
3044
3045 for (; d != NULL; d = d->next)
3046 {
3047 if (name == NULL)
3048 printf("\n%s %s:\n", d->name, type);
3049 else if (Ustrcmp(d->name, name) != 0) continue;
3050
3051 for (ol = ol2; ol < ol2 + size; ol++)
3052 {
3053 if ((ol->type & opt_hidden) == 0)
3054 print_ol(ol, US ol->name, d, ol2, size, no_labels);
3055 }
3056
3057 for (ol = d->info->options;
3058 ol < d->info->options + *(d->info->options_count); ol++)
3059 {
3060 if ((ol->type & opt_hidden) == 0)
3061 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
3062 }
3063 if (name != NULL) return;
3064 }
3065 if (name != NULL) printf("%s %s not found\n", type, name);
3066 }
3067
3068
3069
3070 /*************************************************
3071 * Read a named list item *
3072 *************************************************/
3073
3074 /* This function reads a name and a list (i.e. string). The name is used to
3075 save the list in a tree, sorted by its name. Each entry also has a number,
3076 which can be used for caching tests, but if the string contains any expansion
3077 items other than $key, the number is set negative to inhibit caching. This
3078 mechanism is used for domain, host, and address lists that are referenced by
3079 the "+name" syntax.
3080
3081 Arguments:
3082 anchorp points to the tree anchor
3083 numberp points to the current number for this tree
3084 max the maximum number permitted
3085 s the text of the option line, starting immediately after the name
3086 of the list type
3087 tname the name of the list type, for messages
3088
3089 Returns: nothing
3090 */
3091
3092 static void
3093 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3094 uschar *tname)
3095 {
3096 BOOL forcecache = FALSE;
3097 uschar *ss;
3098 tree_node *t;
3099 namedlist_block *nb = store_get(sizeof(namedlist_block));
3100
3101 if (Ustrncmp(s, "_cache", 6) == 0)
3102 {
3103 forcecache = TRUE;
3104 s += 6;
3105 }
3106
3107 if (!isspace(*s))
3108 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3109
3110 if (*numberp >= max)
3111 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3112 tname, max);
3113
3114 while (isspace(*s)) s++;
3115 ss = s;
3116 while (isalnum(*s) || *s == '_') s++;
3117 t = store_get(sizeof(tree_node) + s-ss);
3118 Ustrncpy(t->name, ss, s-ss);
3119 t->name[s-ss] = 0;
3120 while (isspace(*s)) s++;
3121
3122 if (!tree_insertnode(anchorp, t))
3123 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3124 "duplicate name \"%s\" for a named %s", t->name, tname);
3125
3126 t->data.ptr = nb;
3127 nb->number = *numberp;
3128 *numberp += 1;
3129
3130 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3131 "missing '=' after \"%s\"", t->name);
3132 while (isspace(*s)) s++;
3133 nb->string = read_string(s, t->name);
3134 nb->cache_data = NULL;
3135
3136 /* Check the string for any expansions; if any are found, mark this list
3137 uncacheable unless the user has explicited forced caching. */
3138
3139 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3140 }
3141
3142
3143
3144
3145 /*************************************************
3146 * Unpick data for a rate limit *
3147 *************************************************/
3148
3149 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3150 separate values.
3151
3152 Arguments:
3153 s string, in the form t,b,f,l
3154 where t is the threshold (integer)
3155 b is the initial delay (time)
3156 f is the multiplicative factor (fixed point)
3157 k is the maximum time (time)
3158 threshold where to store threshold
3159 base where to store base in milliseconds
3160 factor where to store factor in milliseconds
3161 limit where to store limit
3162
3163 Returns: nothing (panics on error)
3164 */
3165
3166 static void
3167 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3168 int *limit)
3169 {
3170 uschar bstring[16], lstring[16];
3171
3172 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3173 factor, lstring) == 4)
3174 {
3175 *base = readconf_readtime(bstring, 0, TRUE);
3176 *limit = readconf_readtime(lstring, 0, TRUE);
3177 if (*base >= 0 && *limit >= 0) return;
3178 }
3179 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3180 }
3181
3182
3183
3184
3185 /*************************************************
3186 * Drop privs for checking TLS config *
3187 *************************************************/
3188
3189 /* We want to validate TLS options during readconf, but do not want to be
3190 root when we call into the TLS library, in case of library linkage errors
3191 which cause segfaults; before this check, those were always done as the Exim
3192 runtime user and it makes sense to continue with that.
3193
3194 Assumes: tls_require_ciphers has been set, if it will be
3195 exim_user has been set, if it will be
3196 exim_group has been set, if it will be
3197
3198 Returns: bool for "okay"; false will cause caller to immediately exit.
3199 */
3200
3201 #ifdef SUPPORT_TLS
3202 static BOOL
3203 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3204 {
3205 const uschar *errmsg;
3206 pid_t pid;
3207 int rc, status;
3208 void (*oldsignal)(int);
3209
3210 /* If TLS will never be used, no point checking ciphers */
3211
3212 if ( !tls_advertise_hosts
3213 || !*tls_advertise_hosts
3214 || Ustrcmp(tls_advertise_hosts, ":") == 0
3215 )
3216 return TRUE;
3217 else if (!nowarn && !tls_certificate)
3218 log_write(0, LOG_MAIN,
3219 "Warning: No server certificate defined; will use a selfsigned one.\n"
3220 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3221
3222 oldsignal = signal(SIGCHLD, SIG_DFL);
3223
3224 fflush(NULL);
3225 if ((pid = fork()) < 0)
3226 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3227
3228 if (pid == 0)
3229 {
3230 /* in some modes, will have dropped privilege already */
3231 if (!geteuid())
3232 exim_setugid(exim_uid, exim_gid, FALSE,
3233 US"calling tls_validate_require_cipher");
3234
3235 errmsg = tls_validate_require_cipher();
3236 if (errmsg)
3237 {
3238 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3239 "tls_require_ciphers invalid: %s", errmsg);
3240 }
3241 fflush(NULL);
3242 _exit(0);
3243 }
3244
3245 do {
3246 rc = waitpid(pid, &status, 0);
3247 } while (rc < 0 && errno == EINTR);
3248
3249 DEBUG(D_tls)
3250 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3251 (int)pid, status);
3252
3253 signal(SIGCHLD, oldsignal);
3254
3255 return status == 0;
3256 }
3257 #endif /* SUPPORT_TLS */
3258
3259
3260
3261
3262 /*************************************************
3263 * Read main configuration options *
3264 *************************************************/
3265
3266 /* This function is the first to be called for configuration reading. It
3267 opens the configuration file and reads general configuration settings until
3268 it reaches the end of the configuration section. The file is then left open so
3269 that the remaining configuration data can subsequently be read if needed for
3270 this run of Exim.
3271
3272 The configuration file must be owned either by root or exim, and be writeable
3273 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3274 in the config file, so the test is done on the compiled in values. A slight
3275 anomaly, to be carefully documented.
3276
3277 The name of the configuration file is taken from a list that is included in the
3278 binary of Exim. It can be altered from the command line, but if that is done,
3279 root privilege is immediately withdrawn unless the caller is root or exim.
3280 The first file on the list that exists is used.
3281
3282 For use on multiple systems that share file systems, first look for a
3283 configuration file whose name has the current node name on the end. If that is
3284 not found, try the generic name. For really contorted configurations, that run
3285 multiple Exims with different uid settings, first try adding the effective uid
3286 before the node name. These complications are going to waste resources on most
3287 systems. Therefore they are available only when requested by compile-time
3288 options. */
3289
3290 void
3291 readconf_main(BOOL nowarn)
3292 {
3293 int sep = 0;
3294 struct stat statbuf;
3295 uschar *s, *filename;
3296 const uschar *list = config_main_filelist;
3297
3298 /* Loop through the possible file names */
3299
3300 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3301 {
3302
3303 /* Cut out all the fancy processing unless specifically wanted */
3304
3305 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3306 uschar *suffix = filename + Ustrlen(filename);
3307
3308 /* Try for the node-specific file if a node name exists */
3309
3310 #ifdef CONFIGURE_FILE_USE_NODE
3311 struct utsname uts;
3312 if (uname(&uts) >= 0)
3313 {
3314 #ifdef CONFIGURE_FILE_USE_EUID
3315 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3316 config_file = Ufopen(filename, "rb");
3317 if (config_file == NULL)
3318 #endif /* CONFIGURE_FILE_USE_EUID */
3319 {
3320 sprintf(CS suffix, ".%.256s", uts.nodename);
3321 config_file = Ufopen(filename, "rb");
3322 }
3323 }
3324 #endif /* CONFIGURE_FILE_USE_NODE */
3325
3326 /* Otherwise, try the generic name, possibly with the euid added */
3327
3328 #ifdef CONFIGURE_FILE_USE_EUID
3329 if (config_file == NULL)
3330 {
3331 sprintf(CS suffix, ".%ld", (long int)original_euid);
3332 config_file = Ufopen(filename, "rb");
3333 }
3334 #endif /* CONFIGURE_FILE_USE_EUID */
3335
3336 /* Finally, try the unadorned name */
3337
3338 if (config_file == NULL)
3339 {
3340 *suffix = 0;
3341 config_file = Ufopen(filename, "rb");
3342 }
3343 #else /* if neither defined */
3344
3345 /* This is the common case when the fancy processing is not included. */
3346
3347 config_file = Ufopen(filename, "rb");
3348 #endif
3349
3350 /* If the file does not exist, continue to try any others. For any other
3351 error, break out (and die). */
3352
3353 if (config_file != NULL || errno != ENOENT) break;
3354 }
3355
3356 /* Now, once we found and opened our configuration file, we change the directory
3357 to a safe place. Later we change to $spool_directory. */
3358
3359 if (Uchdir("/") < 0)
3360 {
3361 perror("exim: chdir `/': ");
3362 exit(EXIT_FAILURE);
3363 }
3364
3365 /* On success, save the name for verification; config_filename is used when
3366 logging configuration errors (it changes for .included files) whereas
3367 config_main_filename is the name shown by -bP. Failure to open a configuration
3368 file is a serious disaster. */
3369
3370 if (config_file != NULL)
3371 {
3372 uschar *p;
3373 config_filename = config_main_filename = string_copy(filename);
3374
3375 p = Ustrrchr(filename, '/');
3376 config_main_directory = p ? string_copyn(filename, p - filename)
3377 : string_copy(US".");
3378 }
3379 else
3380 {
3381 if (filename == NULL)
3382 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3383 "%s", config_main_filelist);
3384 else
3385 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3386 "configuration file %s", filename));
3387 }
3388
3389 /* Check the status of the file we have opened, if we have retained root
3390 privileges and the file isn't /dev/null (which *should* be 0666). */
3391
3392 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3393 {
3394 if (fstat(fileno(config_file), &statbuf) != 0)
3395 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3396 big_buffer);
3397
3398 if ((statbuf.st_uid != root_uid /* owner not root */
3399 #ifdef CONFIGURE_OWNER
3400 && statbuf.st_uid != config_uid /* owner not the special one */
3401 #endif
3402 ) || /* or */
3403 (statbuf.st_gid != root_gid /* group not root & */
3404 #ifdef CONFIGURE_GROUP
3405 && statbuf.st_gid != config_gid /* group not the special one */
3406 #endif
3407 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3408 /* or */
3409 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3410
3411 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3412 "wrong owner, group, or mode", big_buffer);
3413 }
3414
3415 /* Process the main configuration settings. They all begin with a lower case
3416 letter. If we see something starting with an upper case letter, it is taken as
3417 a macro definition. */
3418
3419 while ((s = get_config_line()) != NULL)
3420 {
3421 if (isupper(s[0])) read_macro_assignment(s);
3422
3423 else if (Ustrncmp(s, "domainlist", 10) == 0)
3424 read_named_list(&domainlist_anchor, &domainlist_count,
3425 MAX_NAMED_LIST, s+10, US"domain list");
3426
3427 else if (Ustrncmp(s, "hostlist", 8) == 0)
3428 read_named_list(&hostlist_anchor, &hostlist_count,
3429 MAX_NAMED_LIST, s+8, US"host list");
3430
3431 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3432 read_named_list(&addresslist_anchor, &addresslist_count,
3433 MAX_NAMED_LIST, s+11, US"address list");
3434
3435 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3436 read_named_list(&localpartlist_anchor, &localpartlist_count,
3437 MAX_NAMED_LIST, s+13, US"local part list");
3438
3439 else
3440 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3441 NULL, US"main option \"%s\" unknown");
3442 }
3443
3444
3445 /* If local_sender_retain is set, local_from_check must be unset. */
3446
3447 if (local_sender_retain && local_from_check)
3448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3449 "local_sender_retain are set; this combination is not allowed");
3450
3451 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3452 wanted. */
3453
3454 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3455
3456 /* The max retry interval must not be greater than 24 hours. */
3457
3458 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3459
3460 /* remote_max_parallel must be > 0 */
3461
3462 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3463
3464 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3465 start of a new SMTP message. */
3466
3467 freeze_tell_config = freeze_tell;
3468
3469 /* The primary host name may be required for expansion of spool_directory
3470 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3471 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3472 canonize it. Some people like upper case letters in their host names, so we
3473 don't force the case. */
3474
3475 if (primary_hostname == NULL)
3476 {
3477 const uschar *hostname;
3478 struct utsname uts;
3479 if (uname(&uts) < 0)
3480 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3481 hostname = US uts.nodename;
3482
3483 if (Ustrchr(hostname, '.') == NULL)
3484 {
3485 int af = AF_INET;
3486 struct hostent *hostdata;
3487
3488 #if HAVE_IPV6
3489 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3490 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3491 MCL_DOMAIN, TRUE, NULL) != OK))
3492 af = AF_INET6;
3493 #else
3494 af = AF_INET;
3495 #endif
3496
3497 for (;;)
3498 {
3499 #if HAVE_IPV6
3500 #if HAVE_GETIPNODEBYNAME
3501 int error_num;
3502 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3503 #else
3504 hostdata = gethostbyname2(CS hostname, af);
3505 #endif
3506 #else
3507 hostdata = gethostbyname(CS hostname);
3508 #endif
3509
3510 if (hostdata != NULL)
3511 {
3512 hostname = US hostdata->h_name;
3513 break;
3514 }
3515
3516 if (af == AF_INET) break;
3517 af = AF_INET;
3518 }
3519 }
3520
3521 primary_hostname = string_copy(hostname);
3522 }
3523
3524 /* Set up default value for smtp_active_hostname */
3525
3526 smtp_active_hostname = primary_hostname;
3527
3528 /* If spool_directory wasn't set in the build-time configuration, it must have
3529 got set above. Of course, writing to the log may not work if log_file_path is
3530 not set, but it will at least get to syslog or somewhere, with any luck. */
3531
3532 if (*spool_directory == 0)
3533 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3534 "proceed");
3535
3536 /* Expand the spool directory name; it may, for example, contain the primary
3537 host name. Same comment about failure. */
3538
3539 s = expand_string(spool_directory);
3540 if (s == NULL)
3541 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3542 "\"%s\": %s", spool_directory, expand_string_message);
3543 spool_directory = s;
3544
3545 /* Expand log_file_path, which must contain "%s" in any component that isn't
3546 the null string or "syslog". It is also allowed to contain one instance of %D
3547 or %M. However, it must NOT contain % followed by anything else. */
3548
3549 if (*log_file_path != 0)
3550 {
3551 const uschar *ss, *sss;
3552 int sep = ':'; /* Fixed for log file path */
3553 s = expand_string(log_file_path);
3554 if (s == NULL)
3555 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3556 "\"%s\": %s", log_file_path, expand_string_message);
3557
3558 ss = s;
3559 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3560 {
3561 uschar *t;
3562 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3563 t = Ustrstr(sss, "%s");
3564 if (t == NULL)
3565 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3566 "contain \"%%s\"", sss);
3567 *t = 'X';
3568 t = Ustrchr(sss, '%');
3569 if (t != NULL)
3570 {
3571 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3572 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3573 "unexpected \"%%\" character", s);
3574 }
3575 }
3576
3577 log_file_path = s;
3578 }
3579
3580 /* Interpret syslog_facility into an integer argument for 'ident' param to
3581 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3582 leading "log_". */
3583
3584 if (syslog_facility_str != NULL)
3585 {
3586 int i;
3587 uschar *s = syslog_facility_str;
3588
3589 if ((Ustrlen(syslog_facility_str) >= 4) &&
3590 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3591 s += 4;
3592
3593 for (i = 0; i < syslog_list_size; i++)
3594 {
3595 if (strcmpic(s, syslog_list[i].name) == 0)
3596 {
3597 syslog_facility = syslog_list[i].value;
3598 break;
3599 }
3600 }
3601
3602 if (i >= syslog_list_size)
3603 {
3604 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3605 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3606 }
3607 }
3608
3609 /* Expand pid_file_path */
3610
3611 if (*pid_file_path != 0)
3612 {
3613 s = expand_string(pid_file_path);
3614 if (s == NULL)
3615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3616 "\"%s\": %s", pid_file_path, expand_string_message);
3617 pid_file_path = s;
3618 }
3619
3620 /* Set default value of process_log_path */
3621
3622 if (process_log_path == NULL || *process_log_path =='\0')
3623 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3624
3625 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3626 message. */
3627
3628 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3629
3630 /* Unpick the SMTP rate limiting options, if set */
3631
3632 if (smtp_ratelimit_mail != NULL)
3633 {
3634 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3635 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3636 }
3637
3638 if (smtp_ratelimit_rcpt != NULL)
3639 {
3640 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3641 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3642 }
3643
3644 /* The qualify domains default to the primary host name */
3645
3646 if (qualify_domain_sender == NULL)
3647 qualify_domain_sender = primary_hostname;
3648 if (qualify_domain_recipient == NULL)
3649 qualify_domain_recipient = qualify_domain_sender;
3650
3651 /* Setting system_filter_user in the configuration sets the gid as well if a
3652 name is given, but a numerical value does not. */
3653
3654 if (system_filter_uid_set && !system_filter_gid_set)
3655 {
3656 struct passwd *pw = getpwuid(system_filter_uid);
3657 if (pw == NULL)
3658 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3659 (long int)system_filter_uid);
3660 system_filter_gid = pw->pw_gid;
3661 system_filter_gid_set = TRUE;
3662 }
3663
3664 /* If the errors_reply_to field is set, check that it is syntactically valid
3665 and ensure it contains a domain. */
3666
3667 if (errors_reply_to != NULL)
3668 {
3669 uschar *errmess;
3670 int start, end, domain;
3671 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3672 &start, &end, &domain, FALSE);
3673
3674 if (recipient == NULL)
3675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3676 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3677
3678 if (domain == 0)
3679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3680 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3681 }
3682
3683 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3684 smtp_accept_max must also be set. */
3685
3686 if (smtp_accept_max == 0 &&
3687 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3688 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3689 "smtp_accept_max must be set if smtp_accept_queue or "
3690 "smtp_accept_max_per_host is set");
3691
3692 /* Set up the host number if anything is specified. It is an expanded string
3693 so that it can be computed from the host name, for example. We do this last
3694 so as to ensure that everything else is set up before the expansion. */
3695
3696 if (host_number_string != NULL)
3697 {
3698 long int n;
3699 uschar *end;
3700 uschar *s = expand_string(host_number_string);
3701 if (s == NULL)
3702 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3703 "failed to expand localhost_number \"%s\": %s",
3704 host_number_string, expand_string_message);
3705 n = Ustrtol(s, &end, 0);
3706 while (isspace(*end)) end++;
3707 if (*end != 0)
3708 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3709 "localhost_number value is not a number: %s", s);
3710 if (n > LOCALHOST_MAX)
3711 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3712 "localhost_number is greater than the maximum allowed value (%d)",
3713 LOCALHOST_MAX);
3714 host_number = n;
3715 }
3716
3717 #ifdef SUPPORT_TLS
3718 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3719
3720 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3721 tls_verify_certificates == NULL)
3722 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3723 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3724 (tls_verify_hosts != NULL)? "" : "try_");
3725
3726 /* This also checks that the library linkage is working and we can call
3727 routines in it, so call even if tls_require_ciphers is unset */
3728 if (!tls_dropprivs_validate_require_cipher(nowarn))
3729 exit(1);
3730
3731 /* Magic number: at time of writing, 1024 has been the long-standing value
3732 used by so many clients, and what Exim used to use always, that it makes
3733 sense to just min-clamp this max-clamp at that. */
3734 if (tls_dh_max_bits < 1024)
3735 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3736 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3737
3738 /* If openssl_options is set, validate it */
3739 if (openssl_options != NULL)
3740 {
3741 # ifdef USE_GNUTLS
3742 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3743 "openssl_options is set but we're using GnuTLS");
3744 # else
3745 long dummy;
3746 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3747 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3748 "openssl_options parse error: %s", openssl_options);
3749 # endif
3750 }
3751 #endif /*SUPPORT_TLS*/
3752
3753 if (!nowarn && !keep_environment && environ && *environ)
3754 log_write(0, LOG_MAIN,
3755 "Warning: purging the environment.\n"
3756 " Suggested action: use keep_environment.");
3757 }
3758
3759
3760
3761 /*************************************************
3762 * Initialize one driver *
3763 *************************************************/
3764
3765 /* This is called once the driver's generic options, if any, have been read.
3766 We can now find the driver, set up defaults for the private options, and
3767 unset any "set" bits in the private options table (which might have been
3768 set by another incarnation of the same driver).
3769
3770 Arguments:
3771 d pointer to driver instance block, with generic
3772 options filled in
3773 drivers_available vector of available drivers
3774 size_of_info size of each block in drivers_available
3775 class class of driver, for error message
3776
3777 Returns: pointer to the driver info block
3778 */
3779
3780 static driver_info *
3781 init_driver(driver_instance *d, driver_info *drivers_available,
3782 int size_of_info, uschar *class)
3783 {
3784 driver_info *dd;
3785
3786 for (dd = drivers_available; dd->driver_name[0] != 0;
3787 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3788 {
3789 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3790 {
3791 int i;
3792 int len = dd->options_len;
3793 d->info = dd;
3794 d->options_block = store_get(len);
3795 memcpy(d->options_block, dd->options_block, len);
3796 for (i = 0; i < *(dd->options_count); i++)
3797 dd->options[i].type &= ~opt_set;
3798 return dd;
3799 }
3800 }
3801
3802 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3803 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3804
3805 return NULL; /* never obeyed */
3806 }
3807
3808