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