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Add perl_taintmode option
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
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 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
15 static void save_config_line(const uschar* line);
16 static void save_config_position(const uschar *file, int line);
17 static void print_config(BOOL admin);
18
19 #define CSTATE_STACK_SIZE 10
20
21
22 /* Structure for chain (stack) of .included files */
23
24 typedef struct config_file_item {
25 struct config_file_item *next;
26 uschar *filename;
27 FILE *file;
28 int lineno;
29 } config_file_item;
30
31 /* Structure for chain of configuration lines (-bP config) */
32
33 typedef struct config_line_item {
34 struct config_line_item *next;
35 uschar *line;
36 } config_line_item;
37
38 static config_line_item* config_lines;
39
40 /* Structure of table of conditional words and their state transitions */
41
42 typedef struct cond_item {
43 uschar *name;
44 int namelen;
45 int action1;
46 int action2;
47 int pushpop;
48 } cond_item;
49
50 /* Structure of table of syslog facility names and values */
51
52 typedef struct syslog_fac_item {
53 uschar *name;
54 int value;
55 } syslog_fac_item;
56
57 /* constants */
58 static const char * const hidden = "<value not displayable>";
59
60 /* Static variables */
61
62 static config_file_item *config_file_stack = NULL; /* For includes */
63
64 static uschar *syslog_facility_str = NULL;
65 static uschar next_section[24];
66 static uschar time_buffer[24];
67
68 /* State variables for conditional loading (.ifdef / .else / .endif) */
69
70 static int cstate = 0;
71 static int cstate_stack_ptr = -1;
72 static int cstate_stack[CSTATE_STACK_SIZE];
73
74 /* Table of state transitions for handling conditional inclusions. There are
75 four possible state transitions:
76
77 .ifdef true
78 .ifdef false
79 .elifdef true (or .else)
80 .elifdef false
81
82 .endif just causes the previous cstate to be popped off the stack */
83
84 static int next_cstate[3][4] =
85 {
86 /* State 0: reading from file, or reading until next .else or .endif */
87 { 0, 1, 2, 2 },
88 /* State 1: condition failed, skipping until next .else or .endif */
89 { 2, 2, 0, 1 },
90 /* State 2: skipping until .endif */
91 { 2, 2, 2, 2 },
92 };
93
94 /* Table of conditionals and the states to set. For each name, there are four
95 values: the length of the name (to save computing it each time), the state to
96 set if a macro was found in the line, the state to set if a macro was not found
97 in the line, and a stack manipulation setting which is:
98
99 -1 pull state value off the stack
100 0 don't alter the stack
101 +1 push value onto stack, before setting new state
102 */
103
104 static cond_item cond_list[] = {
105 { US"ifdef", 5, 0, 1, 1 },
106 { US"ifndef", 6, 1, 0, 1 },
107 { US"elifdef", 7, 2, 3, 0 },
108 { US"elifndef", 8, 3, 2, 0 },
109 { US"else", 4, 2, 2, 0 },
110 { US"endif", 5, 0, 0, -1 }
111 };
112
113 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
114
115 /* Table of syslog facility names and their values */
116
117 static syslog_fac_item syslog_list[] = {
118 { US"mail", LOG_MAIL },
119 { US"user", LOG_USER },
120 { US"news", LOG_NEWS },
121 { US"uucp", LOG_UUCP },
122 { US"local0", LOG_LOCAL0 },
123 { US"local1", LOG_LOCAL1 },
124 { US"local2", LOG_LOCAL2 },
125 { US"local3", LOG_LOCAL3 },
126 { US"local4", LOG_LOCAL4 },
127 { US"local5", LOG_LOCAL5 },
128 { US"local6", LOG_LOCAL6 },
129 { US"local7", LOG_LOCAL7 },
130 { US"daemon", LOG_DAEMON }
131 };
132
133 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
134
135
136
137
138 /*************************************************
139 * Main configuration options *
140 *************************************************/
141
142 /* The list of options that can be set in the main configuration file. This
143 must be in alphabetic order because it is searched by binary chop. */
144
145 static optionlist optionlist_config[] = {
146 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
147 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
148 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
149 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
150 { "accept_8bitmime", opt_bool, &accept_8bitmime },
151 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
152 #ifdef WITH_CONTENT_SCAN
153 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
154 #endif
155 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
156 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
157 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
158 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
159 #ifndef DISABLE_PRDR
160 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
161 #endif
162 #ifndef DISABLE_DKIM
163 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
164 #endif
165 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
166 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
167 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
168 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
169 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
170 #ifdef WITH_CONTENT_SCAN
171 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
172 #endif
173 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
174 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
175 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
176 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
177 #ifdef SUPPORT_TLS
178 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
179 #endif
180 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
181 { "admin_groups", opt_gidlist, &admin_groups },
182 { "allow_domain_literals", opt_bool, &allow_domain_literals },
183 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
184 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
185 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
186 { "auto_thaw", opt_time, &auto_thaw },
187 #ifdef WITH_CONTENT_SCAN
188 { "av_scanner", opt_stringptr, &av_scanner },
189 #endif
190 { "bi_command", opt_stringptr, &bi_command },
191 #ifdef EXPERIMENTAL_BRIGHTMAIL
192 { "bmi_config_file", opt_stringptr, &bmi_config_file },
193 #endif
194 { "bounce_message_file", opt_stringptr, &bounce_message_file },
195 { "bounce_message_text", opt_stringptr, &bounce_message_text },
196 { "bounce_return_body", opt_bool, &bounce_return_body },
197 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
198 { "bounce_return_message", opt_bool, &bounce_return_message },
199 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
200 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
201 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
202 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
203 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
204 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
205 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
206 { "check_log_inodes", opt_int, &check_log_inodes },
207 { "check_log_space", opt_Kint, &check_log_space },
208 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
209 { "check_spool_inodes", opt_int, &check_spool_inodes },
210 { "check_spool_space", opt_Kint, &check_spool_space },
211 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
212 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
213 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
214 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
215 #ifdef EXPERIMENTAL_DCC
216 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
217 { "dccifd_address", opt_stringptr, &dccifd_address },
218 { "dccifd_options", opt_stringptr, &dccifd_options },
219 #endif
220 { "delay_warning", opt_timelist, &delay_warning },
221 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
222 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
223 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
224 { "delivery_date_remove", opt_bool, &delivery_date_remove },
225 #ifdef ENABLE_DISABLE_FSYNC
226 { "disable_fsync", opt_bool, &disable_fsync },
227 #endif
228 { "disable_ipv6", opt_bool, &disable_ipv6 },
229 #ifndef DISABLE_DKIM
230 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
231 #endif
232 #ifdef EXPERIMENTAL_DMARC
233 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
234 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
235 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
236 #endif
237 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
238 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
239 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
240 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
241 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
242 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
243 { "dns_retrans", opt_time, &dns_retrans },
244 { "dns_retry", opt_int, &dns_retry },
245 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
246 { "dns_use_edns0", opt_int, &dns_use_edns0 },
247 /* This option is now a no-op, retained for compability */
248 { "drop_cr", opt_bool, &drop_cr },
249 /*********************************************************/
250 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
251 { "dsn_from", opt_stringptr, &dsn_from },
252 { "envelope_to_remove", opt_bool, &envelope_to_remove },
253 { "errors_copy", opt_stringptr, &errors_copy },
254 { "errors_reply_to", opt_stringptr, &errors_reply_to },
255 #ifndef DISABLE_EVENT
256 { "event_action", opt_stringptr, &event_action },
257 #endif
258 { "exim_group", opt_gid, &exim_gid },
259 { "exim_path", opt_stringptr, &exim_path },
260 { "exim_user", opt_uid, &exim_uid },
261 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
262 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
263 { "finduser_retries", opt_int, &finduser_retries },
264 { "freeze_tell", opt_stringptr, &freeze_tell },
265 { "gecos_name", opt_stringptr, &gecos_name },
266 { "gecos_pattern", opt_stringptr, &gecos_pattern },
267 #ifdef SUPPORT_TLS
268 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
269 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
270 /* These three gnutls_require_* options stopped working in Exim 4.80 */
271 /* From 4.83 we log a warning; a future relase will remove them */
272 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
273 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
274 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
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_malformed", opt_time, &keep_malformed },
300 #ifdef LOOKUP_LDAP
301 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
302 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
303 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
304 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
305 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
306 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
307 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
308 { "ldap_start_tls", opt_bool, &eldap_start_tls },
309 { "ldap_version", opt_int, &eldap_version },
310 #endif
311 { "local_from_check", opt_bool, &local_from_check },
312 { "local_from_prefix", opt_stringptr, &local_from_prefix },
313 { "local_from_suffix", opt_stringptr, &local_from_suffix },
314 { "local_interfaces", opt_stringptr, &local_interfaces },
315 { "local_scan_timeout", opt_time, &local_scan_timeout },
316 { "local_sender_retain", opt_bool, &local_sender_retain },
317 { "localhost_number", opt_stringptr, &host_number_string },
318 { "log_file_path", opt_stringptr, &log_file_path },
319 { "log_selector", opt_stringptr, &log_selector_string },
320 { "log_timezone", opt_bool, &log_timezone },
321 { "lookup_open_max", opt_int, &lookup_open_max },
322 { "max_username_length", opt_int, &max_username_length },
323 { "message_body_newlines", opt_bool, &message_body_newlines },
324 { "message_body_visible", opt_mkint, &message_body_visible },
325 { "message_id_header_domain", opt_stringptr, &message_id_domain },
326 { "message_id_header_text", opt_stringptr, &message_id_text },
327 { "message_logs", opt_bool, &message_logs },
328 { "message_size_limit", opt_stringptr, &message_size_limit },
329 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
330 { "move_frozen_messages", opt_bool, &move_frozen_messages },
331 #endif
332 { "mua_wrapper", opt_bool, &mua_wrapper },
333 #ifdef LOOKUP_MYSQL
334 { "mysql_servers", opt_stringptr, &mysql_servers },
335 #endif
336 { "never_users", opt_uidlist, &never_users },
337 #ifdef SUPPORT_TLS
338 { "openssl_options", opt_stringptr, &openssl_options },
339 #endif
340 #ifdef LOOKUP_ORACLE
341 { "oracle_servers", opt_stringptr, &oracle_servers },
342 #endif
343 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
344 #ifdef EXIM_PERL
345 { "perl_at_start", opt_bool, &opt_perl_at_start },
346 { "perl_startup", opt_stringptr, &opt_perl_startup },
347 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
348 #endif
349 #ifdef LOOKUP_PGSQL
350 { "pgsql_servers", opt_stringptr, &pgsql_servers },
351 #endif
352 { "pid_file_path", opt_stringptr, &pid_file_path },
353 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
354 #ifndef DISABLE_PRDR
355 { "prdr_enable", opt_bool, &prdr_enable },
356 #endif
357 { "preserve_message_logs", opt_bool, &preserve_message_logs },
358 { "primary_hostname", opt_stringptr, &primary_hostname },
359 { "print_topbitchars", opt_bool, &print_topbitchars },
360 { "process_log_path", opt_stringptr, &process_log_path },
361 { "prod_requires_admin", opt_bool, &prod_requires_admin },
362 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
363 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
364 { "queue_domains", opt_stringptr, &queue_domains },
365 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
366 { "queue_only", opt_bool, &queue_only },
367 { "queue_only_file", opt_stringptr, &queue_only_file },
368 { "queue_only_load", opt_fixed, &queue_only_load },
369 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
370 { "queue_only_override", opt_bool, &queue_only_override },
371 { "queue_run_in_order", opt_bool, &queue_run_in_order },
372 { "queue_run_max", opt_int, &queue_run_max },
373 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
374 { "receive_timeout", opt_time, &receive_timeout },
375 { "received_header_text", opt_stringptr, &received_header_text },
376 { "received_headers_max", opt_int, &received_headers_max },
377 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
378 { "recipients_max", opt_int, &recipients_max },
379 { "recipients_max_reject", opt_bool, &recipients_max_reject },
380 #ifdef LOOKUP_REDIS
381 { "redis_servers", opt_stringptr, &redis_servers },
382 #endif
383 { "remote_max_parallel", opt_int, &remote_max_parallel },
384 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
385 { "retry_data_expire", opt_time, &retry_data_expire },
386 { "retry_interval_max", opt_time, &retry_interval_max },
387 { "return_path_remove", opt_bool, &return_path_remove },
388 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
389 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
390 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
391 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
392 { "slow_lookup_log", opt_int, &slow_lookup_log },
393 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
394 { "smtp_accept_max", opt_int, &smtp_accept_max },
395 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
396 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
397 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
398 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
399 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
400 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
401 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
402 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
403 { "smtp_banner", opt_stringptr, &smtp_banner },
404 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
405 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
406 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
407 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
408 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
409 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
410 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
411 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
412 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
413 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
414 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
415 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
416 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
417 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
418 #ifdef SUPPORT_I18N
419 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
420 #endif
421 #ifdef WITH_CONTENT_SCAN
422 { "spamd_address", opt_stringptr, &spamd_address },
423 #endif
424 #ifdef EXPERIMENTAL_SPF
425 { "spf_guess", opt_stringptr, &spf_guess },
426 #endif
427 { "split_spool_directory", opt_bool, &split_spool_directory },
428 { "spool_directory", opt_stringptr, &spool_directory },
429 #ifdef LOOKUP_SQLITE
430 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
431 #endif
432 #ifdef EXPERIMENTAL_SRS
433 { "srs_config", opt_stringptr, &srs_config },
434 { "srs_hashlength", opt_int, &srs_hashlength },
435 { "srs_hashmin", opt_int, &srs_hashmin },
436 { "srs_maxage", opt_int, &srs_maxage },
437 { "srs_secrets", opt_stringptr, &srs_secrets },
438 { "srs_usehash", opt_bool, &srs_usehash },
439 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
440 #endif
441 { "strict_acl_vars", opt_bool, &strict_acl_vars },
442 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
443 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
444 { "syslog_duplication", opt_bool, &syslog_duplication },
445 { "syslog_facility", opt_stringptr, &syslog_facility_str },
446 { "syslog_processname", opt_stringptr, &syslog_processname },
447 { "syslog_timestamp", opt_bool, &syslog_timestamp },
448 { "system_filter", opt_stringptr, &system_filter },
449 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
450 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
451 { "system_filter_group", opt_gid, &system_filter_gid },
452 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
453 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
454 { "system_filter_user", opt_uid, &system_filter_uid },
455 { "tcp_nodelay", opt_bool, &tcp_nodelay },
456 #ifdef USE_TCP_WRAPPERS
457 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
458 #endif
459 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
460 { "timezone", opt_stringptr, &timezone_string },
461 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
462 #ifdef SUPPORT_TLS
463 { "tls_certificate", opt_stringptr, &tls_certificate },
464 { "tls_crl", opt_stringptr, &tls_crl },
465 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
466 { "tls_dhparam", opt_stringptr, &tls_dhparam },
467 { "tls_eccurve", opt_stringptr, &tls_eccurve },
468 # ifndef DISABLE_OCSP
469 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
470 # endif
471 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
472 { "tls_privatekey", opt_stringptr, &tls_privatekey },
473 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
474 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
475 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
476 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
477 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
478 #endif
479 { "trusted_groups", opt_gidlist, &trusted_groups },
480 { "trusted_users", opt_uidlist, &trusted_users },
481 { "unknown_login", opt_stringptr, &unknown_login },
482 { "unknown_username", opt_stringptr, &unknown_username },
483 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
484 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
485 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
486 { "warn_message_file", opt_stringptr, &warn_message_file },
487 { "write_rejectlog", opt_bool, &write_rejectlog }
488 };
489
490 static int optionlist_config_size =
491 sizeof(optionlist_config)/sizeof(optionlist);
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 != NULL; 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 != NULL; 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 config_file = Ufopen(ss, "rb");
935 if (config_file == NULL)
936 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
937 "configuration file %s", ss);
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 if (c == 0) return ol + middle;
1166 else if (c > 0) first = middle + 1;
1167 else last = middle;
1168 }
1169 return NULL;
1170 }
1171
1172
1173
1174 /*************************************************
1175 * Find a set flag in option list *
1176 *************************************************/
1177
1178 /* Because some versions of Unix make no restrictions on the values of uids and
1179 gids (even negative ones), we cannot represent "unset" by a special value.
1180 There is therefore a separate boolean variable for each one indicating whether
1181 a value is set or not. This function returns a pointer to the boolean, given
1182 the original option name. It is a major disaster if the flag cannot be found.
1183
1184 Arguments:
1185 name the name of the uid or gid option
1186 oltop points to the start of the relevant option list
1187 last one more than the offset of the last item in the option list
1188 data_block NULL when reading main options => data values in the option
1189 list are absolute addresses; otherwise they are byte offsets
1190 in data_block (used for driver options)
1191
1192 Returns: a pointer to the boolean flag.
1193 */
1194
1195 static BOOL *
1196 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1197 {
1198 optionlist *ol;
1199 uschar name2[64];
1200 sprintf(CS name2, "*set_%.50s", name);
1201 ol = find_option(name2, oltop, last);
1202 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1203 "Exim internal error: missing set flag for %s", name);
1204 return (data_block == NULL)? (BOOL *)(ol->value) :
1205 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1206 }
1207
1208
1209
1210
1211 /*************************************************
1212 * Output extra characters message and die *
1213 *************************************************/
1214
1215 /* Called when an option line has junk on the end. Sometimes this is because
1216 the sysadmin thinks comments are permitted.
1217
1218 Arguments:
1219 s points to the extra characters
1220 t1..t3 strings to insert in the log message
1221
1222 Returns: doesn't return; dies
1223 */
1224
1225 static void
1226 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1227 {
1228 uschar *comment = US"";
1229 if (*s == '#') comment = US" (# is comment only at line start)";
1230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1231 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1232 }
1233
1234
1235
1236 /*************************************************
1237 * Read rewrite information *
1238 *************************************************/
1239
1240 /* Each line of rewrite information contains:
1241
1242 . A complete address in the form user@domain, possibly with
1243 leading * for each part; or alternatively, a regex.
1244
1245 . A replacement string (which will be expanded).
1246
1247 . An optional sequence of one-letter flags, indicating which
1248 headers etc. to apply this rule to.
1249
1250 All this is decoded and placed into a control block. The OR of the flags is
1251 maintained in a common word.
1252
1253 Arguments:
1254 p points to the string that makes up the rule
1255 existflags points to the overall flag word
1256 isglobal TRUE if reading global rewrite rules
1257
1258 Returns: the control block for the parsed rule.
1259 */
1260
1261 static rewrite_rule *
1262 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1263 {
1264 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1265
1266 next->next = NULL;
1267 next->key = string_dequote(&p);
1268
1269 while (isspace(*p)) p++;
1270 if (*p == 0)
1271 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1272 "missing rewrite replacement string");
1273
1274 next->flags = 0;
1275 next->replacement = string_dequote(&p);
1276
1277 while (*p != 0) switch (*p++)
1278 {
1279 case ' ': case '\t': break;
1280
1281 case 'q': next->flags |= rewrite_quit; break;
1282 case 'w': next->flags |= rewrite_whole; break;
1283
1284 case 'h': next->flags |= rewrite_all_headers; break;
1285 case 's': next->flags |= rewrite_sender; break;
1286 case 'f': next->flags |= rewrite_from; break;
1287 case 't': next->flags |= rewrite_to; break;
1288 case 'c': next->flags |= rewrite_cc; break;
1289 case 'b': next->flags |= rewrite_bcc; break;
1290 case 'r': next->flags |= rewrite_replyto; break;
1291
1292 case 'E': next->flags |= rewrite_all_envelope; break;
1293 case 'F': next->flags |= rewrite_envfrom; break;
1294 case 'T': next->flags |= rewrite_envto; break;
1295
1296 case 'Q': next->flags |= rewrite_qualify; break;
1297 case 'R': next->flags |= rewrite_repeat; break;
1298
1299 case 'S':
1300 next->flags |= rewrite_smtp;
1301 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1302 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1303 "rewrite rule has the S flag but is not a regular expression");
1304 break;
1305
1306 default:
1307 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1308 "unknown rewrite flag character '%c' "
1309 "(could be missing quotes round replacement item)", p[-1]);
1310 break;
1311 }
1312
1313 /* If no action flags are set, set all the "normal" rewrites. */
1314
1315 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1316 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1317
1318 /* Remember which exist, for optimization, and return the rule */
1319
1320 *existflags |= next->flags;
1321 return next;
1322 }
1323
1324
1325
1326
1327 /*************************************************
1328 * Read global rewrite information *
1329 *************************************************/
1330
1331 /* Each line is a single rewrite rule; it is parsed into a control block
1332 by readconf_one_rewrite(), and its flags are ORed into the global flag
1333 word rewrite_existflags. */
1334
1335 void
1336 readconf_rewrites(void)
1337 {
1338 rewrite_rule **chain = &global_rewrite_rules;
1339 uschar *p;
1340
1341 while ((p = get_config_line()) != NULL)
1342 {
1343 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1344 *chain = next;
1345 chain = &(next->next);
1346 }
1347 }
1348
1349
1350
1351 /*************************************************
1352 * Read a string *
1353 *************************************************/
1354
1355 /* Strings are read into the normal store pool. As long we aren't too
1356 near the end of the current block, the string will just use what is necessary
1357 on the top of the stacking pool, because string_cat() uses the extension
1358 mechanism.
1359
1360 Argument:
1361 s the rest of the input line
1362 name the option name (for errors)
1363
1364 Returns: pointer to the string
1365 */
1366
1367 static uschar *
1368 read_string(const uschar *s, const uschar *name)
1369 {
1370 uschar *yield;
1371 const uschar *ss;
1372
1373 if (*s != '\"') return string_copy(s);
1374
1375 ss = s;
1376 yield = string_dequote(&s);
1377
1378 if (s == ss+1 || s[-1] != '\"')
1379 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1380 "missing quote at end of string value for %s", name);
1381
1382 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1383
1384 return yield;
1385 }
1386
1387
1388 /*************************************************
1389 * Custom-handler options *
1390 *************************************************/
1391 static void
1392 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1393 {
1394 if (*str == '$')
1395 smtp_receive_timeout_s = string_copy(str);
1396 else
1397 {
1398 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1399 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1400 if (smtp_receive_timeout < 0)
1401 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1402 name);
1403 }
1404 }
1405
1406 /*************************************************
1407 * Handle option line *
1408 *************************************************/
1409
1410 /* This function is called from several places to process a line containing the
1411 setting of an option. The first argument is the line to be decoded; it has been
1412 checked not to be empty and not to start with '#'. Trailing newlines and white
1413 space have been removed. The second argument is a pointer to the list of
1414 variable names that are to be recognized, together with their types and
1415 locations, and the third argument gives the number of entries in the list.
1416
1417 The fourth argument is a pointer to a data block. If it is NULL, then the data
1418 values in the options list are absolute addresses. Otherwise, they are byte
1419 offsets in the data block.
1420
1421 String option data may continue onto several lines; this function reads further
1422 data from config_file if necessary.
1423
1424 The yield of this function is normally zero. If a string continues onto
1425 multiple lines, then the data value is permitted to be followed by a comma
1426 or a semicolon (for use in drivers) and the yield is that character.
1427
1428 Arguments:
1429 buffer contains the configuration line to be handled
1430 oltop points to the start of the relevant option list
1431 last one more than the offset of the last item in the option list
1432 data_block NULL when reading main options => data values in the option
1433 list are absolute addresses; otherwise they are byte offsets
1434 in data_block when they have opt_public set; otherwise
1435 they are byte offsets in data_block->options_block.
1436 unknown_txt format string to use in panic message for unknown option;
1437 must contain %s for option name
1438 if given as NULL, don't panic on unknown option
1439
1440 Returns: TRUE if an option was read successfully,
1441 FALSE false for an unknown option if unknown_txt == NULL,
1442 otherwise panic and die on an unknown option
1443 */
1444
1445 static BOOL
1446 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1447 void *data_block, uschar *unknown_txt)
1448 {
1449 int ptr = 0;
1450 int offset = 0;
1451 int n, count, type, value;
1452 int issecure = 0;
1453 uid_t uid;
1454 gid_t gid;
1455 BOOL boolvalue = TRUE;
1456 BOOL freesptr = TRUE;
1457 optionlist *ol, *ol2;
1458 struct passwd *pw;
1459 void *reset_point;
1460 int intbase = 0;
1461 uschar *inttype = US"";
1462 uschar *sptr;
1463 uschar *s = buffer;
1464 uschar *saved_condition, *strtemp;
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 ol = find_option(name + offset, oltop, last);
1512
1513 if (ol == NULL)
1514 {
1515 if (unknown_txt == NULL) return FALSE;
1516 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1517 }
1518
1519 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1520 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1521 "\"%s\" option set for the second time", name);
1522
1523 ol->type |= opt_set | issecure;
1524 type = ol->type & opt_mask;
1525
1526 /* Types with data values must be followed by '='; the "no[t]_" prefix
1527 applies only to boolean values. */
1528
1529 if (type < opt_bool || type > opt_bool_last)
1530 {
1531 if (offset != 0)
1532 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1533 "negation prefix applied to a non-boolean option");
1534 if (*s == 0)
1535 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1536 "unexpected end of line (data missing) after %s", name);
1537 if (*s != '=')
1538 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1539 }
1540
1541 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1542 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1543 ultimately expands to one of those values. */
1544
1545 else if (*s != 0 && (offset != 0 || *s != '='))
1546 extra_chars_error(s, US"boolean option ", name, US"");
1547
1548 /* Skip white space after = */
1549
1550 if (*s == '=') while (isspace((*(++s))));
1551
1552 /* If there is a data block and the opt_public flag is not set, change
1553 the data block pointer to the private options block. */
1554
1555 if (data_block != NULL && (ol->type & opt_public) == 0)
1556 data_block = (void *)(((driver_instance *)data_block)->options_block);
1557
1558 /* Now get the data according to the type. */
1559
1560 switch (type)
1561 {
1562 /* If a string value is not enclosed in quotes, it consists of
1563 the rest of the current line, verbatim. Otherwise, string escapes
1564 are processed.
1565
1566 A transport is specified as a string, which is then looked up in the
1567 list of transports. A search type is specified as one of a number of
1568 known strings.
1569
1570 A set or rewrite rules for a driver is specified as a string, which is
1571 then parsed into a suitable chain of control blocks.
1572
1573 Uids and gids are specified as strings which are then looked up in the
1574 passwd file. Lists of uids and gids are similarly specified as colon-
1575 separated strings. */
1576
1577 case opt_stringptr:
1578 case opt_uid:
1579 case opt_gid:
1580 case opt_expand_uid:
1581 case opt_expand_gid:
1582 case opt_uidlist:
1583 case opt_gidlist:
1584 case opt_rewrite:
1585
1586 reset_point = sptr = read_string(s, name);
1587
1588 /* Having read a string, we now have several different ways of using it,
1589 depending on the data type, so do another switch. If keeping the actual
1590 string is not required (because it is interpreted), freesptr is set TRUE,
1591 and at the end we reset the pool. */
1592
1593 switch (type)
1594 {
1595 /* If this was a string, set the variable to point to the new string,
1596 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1597 rules, we still keep the string (for printing), and parse the rules into a
1598 control block and flags word. */
1599
1600 case opt_stringptr:
1601 if (data_block == NULL)
1602 str_target = (uschar **)(ol->value);
1603 else
1604 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1605 if (ol->type & opt_rep_con)
1606 {
1607 /* We already have a condition, we're conducting a crude hack to let
1608 multiple condition rules be chained together, despite storing them in
1609 text form. */
1610 saved_condition = *str_target;
1611 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1612 saved_condition, sptr);
1613 *str_target = string_copy_malloc(strtemp);
1614 /* TODO(pdp): there is a memory leak here and just below
1615 when we set 3 or more conditions; I still don't
1616 understand the store mechanism enough to know
1617 what's the safe way to free content from an earlier store.
1618 AFAICT, stores stack, so freeing an early stored item also stores
1619 all data alloc'd after it. If we knew conditions were adjacent,
1620 we could survive that, but we don't. So I *think* we need to take
1621 another bit from opt_type to indicate "malloced"; this seems like
1622 quite a hack, especially for this one case. It also means that
1623 we can't ever reclaim the store from the *first* condition.
1624
1625 Because we only do this once, near process start-up, I'm prepared to
1626 let this slide for the time being, even though it rankles. */
1627 }
1628 else if (ol->type & opt_rep_str)
1629 {
1630 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1631 int sep_i = -(int)sep_o;
1632 const uschar * list = sptr;
1633 uschar * s;
1634 uschar * list_o = *str_target;
1635
1636 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1637 list_o = string_append_listele(list_o, sep_o, s);
1638 if (list_o)
1639 *str_target = string_copy_malloc(list_o);
1640 }
1641 else
1642 {
1643 *str_target = sptr;
1644 freesptr = FALSE;
1645 }
1646 break;
1647
1648 case opt_rewrite:
1649 if (data_block == NULL)
1650 *((uschar **)(ol->value)) = sptr;
1651 else
1652 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1653 freesptr = FALSE;
1654 if (type == opt_rewrite)
1655 {
1656 int sep = 0;
1657 int *flagptr;
1658 uschar *p = sptr;
1659 rewrite_rule **chain;
1660 optionlist *ol3;
1661
1662 sprintf(CS name2, "*%.50s_rules", name);
1663 ol2 = find_option(name2, oltop, last);
1664 sprintf(CS name2, "*%.50s_flags", name);
1665 ol3 = find_option(name2, oltop, last);
1666
1667 if (ol2 == NULL || ol3 == NULL)
1668 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1669 "rewrite rules not available for driver");
1670
1671 if (data_block == NULL)
1672 {
1673 chain = (rewrite_rule **)(ol2->value);
1674 flagptr = (int *)(ol3->value);
1675 }
1676 else
1677 {
1678 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1679 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1680 }
1681
1682 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1683 {
1684 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1685 *chain = next;
1686 chain = &(next->next);
1687 }
1688
1689 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1690 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1691 "non-header rewrite - not allowed at transport time -");
1692 }
1693 break;
1694
1695 /* If it was an expanded uid, see if there is any expansion to be
1696 done by checking for the presence of a $ character. If there is, save it
1697 in the corresponding *expand_user option field. Otherwise, fall through
1698 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1699 of data. */
1700
1701 case opt_expand_uid:
1702 sprintf(CS name2, "*expand_%.50s", name);
1703 ol2 = find_option(name2, oltop, last);
1704 if (ol2 != NULL)
1705 {
1706 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1707
1708 if (data_block == NULL)
1709 *((uschar **)(ol2->value)) = ss;
1710 else
1711 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1712
1713 if (ss != NULL)
1714 {
1715 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1716 freesptr = FALSE;
1717 break;
1718 }
1719 }
1720
1721 /* Look up a fixed uid, and also make use of the corresponding gid
1722 if a passwd entry is returned and the gid has not been set. */
1723
1724 case opt_uid:
1725 if (!route_finduser(sptr, &pw, &uid))
1726 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1727 if (data_block == NULL)
1728 *((uid_t *)(ol->value)) = uid;
1729 else
1730 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1731
1732 /* Set the flag indicating a fixed value is set */
1733
1734 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1735
1736 /* Handle matching gid if we have a passwd entry: done by finding the
1737 same name with terminating "user" changed to "group"; if not found,
1738 ignore. Also ignore if the value is already set. */
1739
1740 if (pw == NULL) break;
1741 Ustrcpy(name+Ustrlen(name)-4, "group");
1742 ol2 = find_option(name, oltop, last);
1743 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1744 (ol2->type & opt_mask) == opt_expand_gid))
1745 {
1746 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1747 if (! *set_flag)
1748 {
1749 if (data_block == NULL)
1750 *((gid_t *)(ol2->value)) = pw->pw_gid;
1751 else
1752 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1753 *set_flag = TRUE;
1754 }
1755 }
1756 break;
1757
1758 /* If it was an expanded gid, see if there is any expansion to be
1759 done by checking for the presence of a $ character. If there is, save it
1760 in the corresponding *expand_user option field. Otherwise, fall through
1761 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1762 of data. */
1763
1764 case opt_expand_gid:
1765 sprintf(CS name2, "*expand_%.50s", name);
1766 ol2 = find_option(name2, oltop, last);
1767 if (ol2 != NULL)
1768 {
1769 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1770
1771 if (data_block == NULL)
1772 *((uschar **)(ol2->value)) = ss;
1773 else
1774 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1775
1776 if (ss != NULL)
1777 {
1778 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1779 freesptr = FALSE;
1780 break;
1781 }
1782 }
1783
1784 /* Handle freestanding gid */
1785
1786 case opt_gid:
1787 if (!route_findgroup(sptr, &gid))
1788 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1789 if (data_block == NULL)
1790 *((gid_t *)(ol->value)) = gid;
1791 else
1792 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1793 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1794 break;
1795
1796 /* If it was a uid list, look up each individual entry, and build
1797 a vector of uids, with a count in the first element. Put the vector
1798 in malloc store so we can free the string. (We are reading into
1799 permanent store already.) */
1800
1801 case opt_uidlist:
1802 {
1803 int count = 1;
1804 uid_t *list;
1805 int ptr = 0;
1806 const uschar *p;
1807 const uschar *op = expand_string (sptr);
1808
1809 if (op == NULL)
1810 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1811 name, expand_string_message);
1812
1813 p = op;
1814 if (*p != 0) count++;
1815 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1816 list = store_malloc(count*sizeof(uid_t));
1817 list[ptr++] = (uid_t)(count - 1);
1818
1819 if (data_block == NULL)
1820 *((uid_t **)(ol->value)) = list;
1821 else
1822 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1823
1824 p = op;
1825 while (count-- > 1)
1826 {
1827 int sep = 0;
1828 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1829 if (!route_finduser(big_buffer, NULL, &uid))
1830 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1831 big_buffer);
1832 list[ptr++] = uid;
1833 }
1834 }
1835 break;
1836
1837 /* If it was a gid list, look up each individual entry, and build
1838 a vector of gids, with a count in the first element. Put the vector
1839 in malloc store so we can free the string. (We are reading into permanent
1840 store already.) */
1841
1842 case opt_gidlist:
1843 {
1844 int count = 1;
1845 gid_t *list;
1846 int ptr = 0;
1847 const uschar *p;
1848 const uschar *op = expand_string (sptr);
1849
1850 if (op == NULL)
1851 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1852 name, expand_string_message);
1853
1854 p = op;
1855 if (*p != 0) count++;
1856 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1857 list = store_malloc(count*sizeof(gid_t));
1858 list[ptr++] = (gid_t)(count - 1);
1859
1860 if (data_block == NULL)
1861 *((gid_t **)(ol->value)) = list;
1862 else
1863 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1864
1865 p = op;
1866 while (count-- > 1)
1867 {
1868 int sep = 0;
1869 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1870 if (!route_findgroup(big_buffer, &gid))
1871 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1872 big_buffer);
1873 list[ptr++] = gid;
1874 }
1875 }
1876 break;
1877 }
1878
1879 /* Release store if the value of the string doesn't need to be kept. */
1880
1881 if (freesptr) store_reset(reset_point);
1882 break;
1883
1884 /* Expanded boolean: if no characters follow, or if there are no dollar
1885 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1886 save the string for later expansion in the alternate place. */
1887
1888 case opt_expand_bool:
1889 if (*s != 0 && Ustrchr(s, '$') != 0)
1890 {
1891 sprintf(CS name2, "*expand_%.50s", name);
1892 ol2 = find_option(name2, oltop, last);
1893 if (ol2 != NULL)
1894 {
1895 reset_point = sptr = read_string(s, name);
1896 if (data_block == NULL)
1897 *((uschar **)(ol2->value)) = sptr;
1898 else
1899 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1900 freesptr = FALSE;
1901 break;
1902 }
1903 }
1904 /* Fall through */
1905
1906 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1907 look for yes/not/true/false. Some booleans are stored in a single bit in
1908 a single int. There's a special fudge for verify settings; without a suffix
1909 they set both xx_sender and xx_recipient. The table points to the sender
1910 value; search subsequently for the recipient. There's another special case:
1911 opt_bool_set also notes when a boolean has been set. */
1912
1913 case opt_bool:
1914 case opt_bit:
1915 case opt_bool_verify:
1916 case opt_bool_set:
1917 if (*s != 0)
1918 {
1919 s = readconf_readname(name2, 64, s);
1920 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1921 boolvalue = TRUE;
1922 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1923 boolvalue = FALSE;
1924 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1925 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1926 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1927 US"for boolean option ", name);
1928 }
1929
1930 /* Handle single-bit type. */
1931
1932 if (type == opt_bit)
1933 {
1934 int bit = 1 << ((ol->type >> 16) & 31);
1935 int *ptr = (data_block == NULL)?
1936 (int *)(ol->value) :
1937 (int *)((uschar *)data_block + (long int)ol->value);
1938 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1939 break;
1940 }
1941
1942 /* Handle full BOOL types */
1943
1944 if (data_block == NULL)
1945 *((BOOL *)(ol->value)) = boolvalue;
1946 else
1947 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1948
1949 /* Verify fudge */
1950
1951 if (type == opt_bool_verify)
1952 {
1953 sprintf(CS name2, "%.50s_recipient", name + offset);
1954 ol2 = find_option(name2, oltop, last);
1955 if (ol2 != NULL)
1956 {
1957 if (data_block == NULL)
1958 *((BOOL *)(ol2->value)) = boolvalue;
1959 else
1960 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1961 }
1962 }
1963
1964 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1965
1966 else if (type == opt_bool_set)
1967 {
1968 sprintf(CS name2, "*set_%.50s", name + offset);
1969 ol2 = find_option(name2, oltop, last);
1970 if (ol2 != NULL)
1971 {
1972 if (data_block == NULL)
1973 *((BOOL *)(ol2->value)) = TRUE;
1974 else
1975 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1976 }
1977 }
1978 break;
1979
1980 /* Octal integer */
1981
1982 case opt_octint:
1983 intbase = 8;
1984 inttype = US"octal ";
1985
1986 /* Integer: a simple(ish) case; allow octal and hex formats, and
1987 suffixes K and M. The different types affect output, not input. */
1988
1989 case opt_mkint:
1990 case opt_int:
1991 {
1992 uschar *endptr;
1993 long int lvalue;
1994
1995 errno = 0;
1996 lvalue = strtol(CS s, CSS &endptr, intbase);
1997
1998 if (endptr == s)
1999 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2000 inttype, name);
2001
2002 if (errno != ERANGE)
2003 {
2004 if (tolower(*endptr) == 'k')
2005 {
2006 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2007 else lvalue *= 1024;
2008 endptr++;
2009 }
2010 else if (tolower(*endptr) == 'm')
2011 {
2012 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2013 errno = ERANGE;
2014 else lvalue *= 1024*1024;
2015 endptr++;
2016 }
2017 }
2018
2019 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2020 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2021 "absolute value of integer \"%s\" is too large (overflow)", s);
2022
2023 while (isspace(*endptr)) endptr++;
2024 if (*endptr != 0)
2025 extra_chars_error(endptr, inttype, US"integer value for ", name);
2026
2027 value = (int)lvalue;
2028 }
2029
2030 if (data_block == NULL)
2031 *((int *)(ol->value)) = value;
2032 else
2033 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2034 break;
2035
2036 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
2037 M. */
2038
2039 case opt_Kint:
2040 {
2041 uschar *endptr;
2042 errno = 0;
2043 value = strtol(CS s, CSS &endptr, intbase);
2044
2045 if (endptr == s)
2046 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2047 inttype, name);
2048
2049 if (errno != ERANGE)
2050 {
2051 if (tolower(*endptr) == 'm')
2052 {
2053 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
2054 else value *= 1024;
2055 endptr++;
2056 }
2057 else if (tolower(*endptr) == 'k')
2058 {
2059 endptr++;
2060 }
2061 else
2062 {
2063 value = (value + 512)/1024;
2064 }
2065 }
2066
2067 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2068 "absolute value of integer \"%s\" is too large (overflow)", s);
2069
2070 while (isspace(*endptr)) endptr++;
2071 if (*endptr != 0)
2072 extra_chars_error(endptr, inttype, US"integer value for ", name);
2073 }
2074
2075 if (data_block == NULL)
2076 *((int *)(ol->value)) = value;
2077 else
2078 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2079 break;
2080
2081 /* Fixed-point number: held to 3 decimal places. */
2082
2083 case opt_fixed:
2084 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2085 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2086 "fixed-point number expected for %s", name);
2087
2088 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2089 "integer \"%s\" is too large (overflow)", s);
2090
2091 value *= 1000;
2092
2093 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2094 "integer \"%s\" is too large (overflow)", s);
2095
2096 if (s[count] == '.')
2097 {
2098 int d = 100;
2099 while (isdigit(s[++count]))
2100 {
2101 value += (s[count] - '0') * d;
2102 d /= 10;
2103 }
2104 }
2105
2106 while (isspace(s[count])) count++;
2107
2108 if (s[count] != 0)
2109 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2110
2111 if (data_block == NULL)
2112 *((int *)(ol->value)) = value;
2113 else
2114 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2115 break;
2116
2117 /* There's a special routine to read time values. */
2118
2119 case opt_time:
2120 value = readconf_readtime(s, 0, FALSE);
2121 if (value < 0)
2122 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2123 name);
2124 if (data_block == NULL)
2125 *((int *)(ol->value)) = value;
2126 else
2127 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2128 break;
2129
2130 /* A time list is a list of colon-separated times, with the first
2131 element holding the size of the list and the second the number of
2132 entries used. */
2133
2134 case opt_timelist:
2135 {
2136 int count = 0;
2137 int *list = (data_block == NULL)?
2138 (int *)(ol->value) :
2139 (int *)((uschar *)data_block + (long int)(ol->value));
2140
2141 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2142 {
2143 int terminator = 0;
2144 uschar *snext = Ustrchr(s, ':');
2145 if (snext != NULL)
2146 {
2147 uschar *ss = snext;
2148 while (ss > s && isspace(ss[-1])) ss--;
2149 terminator = *ss;
2150 }
2151 value = readconf_readtime(s, terminator, FALSE);
2152 if (value < 0)
2153 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2154 name);
2155 if (count > 1 && value <= list[count])
2156 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2157 "time value out of order for %s", name);
2158 list[count+1] = value;
2159 if (snext == NULL) break;
2160 s = snext + 1;
2161 while (isspace(*s)) s++;
2162 }
2163
2164 if (count > list[0] - 2)
2165 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2166 name);
2167 if (count > 0 && list[2] == 0) count = 0;
2168 list[1] = count;
2169 break;
2170 }
2171
2172 case opt_func:
2173 {
2174 void (*fn)() = ol->value;
2175 fn(name, s);
2176 break;
2177 }
2178 }
2179
2180 return TRUE;
2181 }
2182
2183
2184
2185 /*************************************************
2186 * Print a time value *
2187 *************************************************/
2188
2189 /*
2190 Argument: a time value in seconds
2191 Returns: pointer to a fixed buffer containing the time as a string,
2192 in readconf_readtime() format
2193 */
2194
2195 uschar *
2196 readconf_printtime(int t)
2197 {
2198 int s, m, h, d, w;
2199 uschar *p = time_buffer;
2200
2201 if (t < 0)
2202 {
2203 *p++ = '-';
2204 t = -t;
2205 }
2206
2207 s = t % 60;
2208 t /= 60;
2209 m = t % 60;
2210 t /= 60;
2211 h = t % 24;
2212 t /= 24;
2213 d = t % 7;
2214 w = t/7;
2215
2216 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2217 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2218 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2219 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2220 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2221
2222 return time_buffer;
2223 }
2224
2225
2226
2227 /*************************************************
2228 * Print an individual option value *
2229 *************************************************/
2230
2231 /* This is used by the -bP option, so prints to the standard output.
2232 The entire options list is passed in as an argument, because some options come
2233 in pairs - typically uid/gid settings, which can either be explicit numerical
2234 values, or strings to be expanded later. If the numerical value is unset,
2235 search for "*expand_<name>" to see if there is a string equivalent.
2236
2237 Arguments:
2238 ol option entry, or NULL for an unknown option
2239 name option name
2240 options_block NULL for main configuration options; otherwise points to
2241 a driver block; if the option doesn't have opt_public
2242 set, then options_block->options_block is where the item
2243 resides.
2244 oltop points to the option list in which ol exists
2245 last one more than the offset of the last entry in optop
2246 no_labels do not show "foo = " at the start.
2247
2248 Returns: nothing
2249 */
2250
2251 static void
2252 print_ol(optionlist *ol, uschar *name, void *options_block,
2253 optionlist *oltop, int last, BOOL no_labels)
2254 {
2255 struct passwd *pw;
2256 struct group *gr;
2257 optionlist *ol2;
2258 void *value;
2259 uid_t *uidlist;
2260 gid_t *gidlist;
2261 uschar *s;
2262 uschar name2[64];
2263
2264 if (ol == NULL)
2265 {
2266 printf("%s is not a known option\n", name);
2267 return;
2268 }
2269
2270 /* Non-admin callers cannot see options that have been flagged secure by the
2271 "hide" prefix. */
2272
2273 if (!admin_user && (ol->type & opt_secure) != 0)
2274 {
2275 if (no_labels)
2276 printf("%s\n", hidden);
2277 else
2278 printf("%s = %s\n", name, hidden);
2279 return;
2280 }
2281
2282 /* Else show the value of the option */
2283
2284 value = ol->value;
2285 if (options_block != NULL)
2286 {
2287 if ((ol->type & opt_public) == 0)
2288 options_block = (void *)(((driver_instance *)options_block)->options_block);
2289 value = (void *)((uschar *)options_block + (long int)value);
2290 }
2291
2292 switch(ol->type & opt_mask)
2293 {
2294 case opt_stringptr:
2295 case opt_rewrite: /* Show the text value */
2296 s = *((uschar **)value);
2297 if (!no_labels) printf("%s = ", name);
2298 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2299 break;
2300
2301 case opt_int:
2302 if (!no_labels) printf("%s = ", name);
2303 printf("%d\n", *((int *)value));
2304 break;
2305
2306 case opt_mkint:
2307 {
2308 int x = *((int *)value);
2309 if (x != 0 && (x & 1023) == 0)
2310 {
2311 int c = 'K';
2312 x >>= 10;
2313 if ((x & 1023) == 0)
2314 {
2315 c = 'M';
2316 x >>= 10;
2317 }
2318 if (!no_labels) printf("%s = ", name);
2319 printf("%d%c\n", x, c);
2320 }
2321 else
2322 {
2323 if (!no_labels) printf("%s = ", name);
2324 printf("%d\n", x);
2325 }
2326 }
2327 break;
2328
2329 case opt_Kint:
2330 {
2331 int x = *((int *)value);
2332 if (!no_labels) printf("%s = ", name);
2333 if (x == 0) printf("0\n");
2334 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2335 else printf("%dK\n", x);
2336 }
2337 break;
2338
2339 case opt_octint:
2340 if (!no_labels) printf("%s = ", name);
2341 printf("%#o\n", *((int *)value));
2342 break;
2343
2344 /* Can be negative only when "unset", in which case integer */
2345
2346 case opt_fixed:
2347 {
2348 int x = *((int *)value);
2349 int f = x % 1000;
2350 int d = 100;
2351 if (x < 0) printf("%s =\n", name); else
2352 {
2353 if (!no_labels) printf("%s = ", name);
2354 printf("%d.", x/1000);
2355 do
2356 {
2357 printf("%d", f/d);
2358 f %= d;
2359 d /= 10;
2360 }
2361 while (f != 0);
2362 printf("\n");
2363 }
2364 }
2365 break;
2366
2367 /* If the numerical value is unset, try for the string value */
2368
2369 case opt_expand_uid:
2370 if (! *get_set_flag(name, oltop, last, options_block))
2371 {
2372 sprintf(CS name2, "*expand_%.50s", name);
2373 ol2 = find_option(name2, oltop, last);
2374 if (ol2 != NULL)
2375 {
2376 void *value2 = ol2->value;
2377 if (options_block != NULL)
2378 value2 = (void *)((uschar *)options_block + (long int)value2);
2379 s = *((uschar **)value2);
2380 if (!no_labels) printf("%s = ", name);
2381 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2382 break;
2383 }
2384 }
2385
2386 /* Else fall through */
2387
2388 case opt_uid:
2389 if (!no_labels) printf("%s = ", name);
2390 if (! *get_set_flag(name, oltop, last, options_block))
2391 printf("\n");
2392 else
2393 {
2394 pw = getpwuid(*((uid_t *)value));
2395 if (pw == NULL)
2396 printf("%ld\n", (long int)(*((uid_t *)value)));
2397 else printf("%s\n", pw->pw_name);
2398 }
2399 break;
2400
2401 /* If the numerical value is unset, try for the string value */
2402
2403 case opt_expand_gid:
2404 if (! *get_set_flag(name, oltop, last, options_block))
2405 {
2406 sprintf(CS name2, "*expand_%.50s", name);
2407 ol2 = find_option(name2, oltop, last);
2408 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2409 {
2410 void *value2 = ol2->value;
2411 if (options_block != NULL)
2412 value2 = (void *)((uschar *)options_block + (long int)value2);
2413 s = *((uschar **)value2);
2414 if (!no_labels) printf("%s = ", name);
2415 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2416 break;
2417 }
2418 }
2419
2420 /* Else fall through */
2421
2422 case opt_gid:
2423 if (!no_labels) printf("%s = ", name);
2424 if (! *get_set_flag(name, oltop, last, options_block))
2425 printf("\n");
2426 else
2427 {
2428 gr = getgrgid(*((int *)value));
2429 if (gr == NULL)
2430 printf("%ld\n", (long int)(*((int *)value)));
2431 else printf("%s\n", gr->gr_name);
2432 }
2433 break;
2434
2435 case opt_uidlist:
2436 uidlist = *((uid_t **)value);
2437 if (!no_labels) printf("%s =", name);
2438 if (uidlist != NULL)
2439 {
2440 int i;
2441 uschar sep = ' ';
2442 if (no_labels) sep = '\0';
2443 for (i = 1; i <= (int)(uidlist[0]); i++)
2444 {
2445 uschar *name = NULL;
2446 pw = getpwuid(uidlist[i]);
2447 if (pw != NULL) name = US pw->pw_name;
2448 if (sep != '\0') printf("%c", sep);
2449 if (name != NULL) printf("%s", name);
2450 else printf("%ld", (long int)(uidlist[i]));
2451 sep = ':';
2452 }
2453 }
2454 printf("\n");
2455 break;
2456
2457 case opt_gidlist:
2458 gidlist = *((gid_t **)value);
2459 if (!no_labels) printf("%s =", name);
2460 if (gidlist != NULL)
2461 {
2462 int i;
2463 uschar sep = ' ';
2464 if (no_labels) sep = '\0';
2465 for (i = 1; i <= (int)(gidlist[0]); i++)
2466 {
2467 uschar *name = NULL;
2468 gr = getgrgid(gidlist[i]);
2469 if (gr != NULL) name = US gr->gr_name;
2470 if (sep != '\0') printf("%c", sep);
2471 if (name != NULL) printf("%s", name);
2472 else printf("%ld", (long int)(gidlist[i]));
2473 sep = ':';
2474 }
2475 }
2476 printf("\n");
2477 break;
2478
2479 case opt_time:
2480 if (!no_labels) printf("%s = ", name);
2481 printf("%s\n", readconf_printtime(*((int *)value)));
2482 break;
2483
2484 case opt_timelist:
2485 {
2486 int i;
2487 int *list = (int *)value;
2488 if (!no_labels) printf("%s = ", name);
2489 for (i = 0; i < list[1]; i++)
2490 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2491 printf("\n");
2492 }
2493 break;
2494
2495 case opt_bit:
2496 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2497 "" : "no_", name);
2498 break;
2499
2500 case opt_expand_bool:
2501 sprintf(CS name2, "*expand_%.50s", name);
2502 ol2 = find_option(name2, oltop, last);
2503 if (ol2 != NULL && ol2->value != NULL)
2504 {
2505 void *value2 = ol2->value;
2506 if (options_block != NULL)
2507 value2 = (void *)((uschar *)options_block + (long int)value2);
2508 s = *((uschar **)value2);
2509 if (s != NULL)
2510 {
2511 if (!no_labels) printf("%s = ", name);
2512 printf("%s\n", string_printing(s));
2513 break;
2514 }
2515 /* s == NULL => string not set; fall through */
2516 }
2517
2518 /* Fall through */
2519
2520 case opt_bool:
2521 case opt_bool_verify:
2522 case opt_bool_set:
2523 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2524 break;
2525 }
2526 }
2527
2528
2529
2530 /*************************************************
2531 * Print value from main configuration *
2532 *************************************************/
2533
2534 /* This function, called as a result of encountering the -bP option,
2535 causes the value of any main configuration variable to be output if the
2536 second argument is NULL. There are some special values:
2537
2538 all print all main configuration options
2539 config_file print the name of the configuration file
2540 (configure_file will still work, for backward
2541 compatibility)
2542 routers print the routers' configurations
2543 transports print the transports' configuration
2544 authenticators print the authenticators' configuration
2545 macros print the macros' configuration
2546 router_list print a list of router names
2547 transport_list print a list of transport names
2548 authenticator_list print a list of authentication mechanism names
2549 macro_list print a list of macro names
2550 +name print a named list item
2551 local_scan print the local_scan options
2552 config print the configuration as it is parsed
2553
2554 If the second argument is not NULL, it must be one of "router", "transport",
2555 "authenticator" or "macro" in which case the first argument identifies the
2556 driver whose options are to be printed.
2557
2558 Arguments:
2559 name option name if type == NULL; else driver name
2560 type NULL or driver type name, as described above
2561 no_labels avoid the "foo = " at the start of an item
2562
2563 Returns: nothing
2564 */
2565
2566 void
2567 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2568 {
2569 BOOL names_only = FALSE;
2570 optionlist *ol;
2571 optionlist *ol2 = NULL;
2572 driver_instance *d = NULL;
2573 macro_item *m;
2574 int size = 0;
2575
2576 if (type == NULL)
2577 {
2578 if (*name == '+')
2579 {
2580 int i;
2581 tree_node *t;
2582 BOOL found = FALSE;
2583 static uschar *types[] = { US"address", US"domain", US"host",
2584 US"localpart" };
2585 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2586 &hostlist_anchor, &localpartlist_anchor };
2587
2588 for (i = 0; i < 4; i++)
2589 {
2590 t = tree_search(*(anchors[i]), name+1);
2591 if (t != NULL)
2592 {
2593 found = TRUE;
2594 if (no_labels)
2595 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2596 else
2597 printf("%slist %s = %s\n", types[i], name+1,
2598 ((namedlist_block *)(t->data.ptr))->string);
2599 }
2600 }
2601
2602 if (!found)
2603 printf("no address, domain, host, or local part list called \"%s\" "
2604 "exists\n", name+1);
2605
2606 return;
2607 }
2608
2609 if ( Ustrcmp(name, "configure_file") == 0
2610 ||Ustrcmp(name, "config_file") == 0)
2611 {
2612 printf("%s\n", CS config_main_filename);
2613 return;
2614 }
2615
2616 if (Ustrcmp(name, "all") == 0)
2617 {
2618 for (ol = optionlist_config;
2619 ol < optionlist_config + optionlist_config_size; ol++)
2620 {
2621 if ((ol->type & opt_hidden) == 0)
2622 print_ol(ol, US ol->name, NULL,
2623 optionlist_config, optionlist_config_size,
2624 no_labels);
2625 }
2626 return;
2627 }
2628
2629 if (Ustrcmp(name, "local_scan") == 0)
2630 {
2631 #ifndef LOCAL_SCAN_HAS_OPTIONS
2632 printf("local_scan() options are not supported\n");
2633 #else
2634 for (ol = local_scan_options;
2635 ol < local_scan_options + local_scan_options_count; ol++)
2636 {
2637 print_ol(ol, US ol->name, NULL, local_scan_options,
2638 local_scan_options_count, no_labels);
2639 }
2640 #endif
2641 return;
2642 }
2643
2644 if (Ustrcmp(name, "config") == 0)
2645 {
2646 print_config(admin_user);
2647 return;
2648 }
2649
2650 if (Ustrcmp(name, "routers") == 0)
2651 {
2652 type = US"router";
2653 name = NULL;
2654 }
2655 else if (Ustrcmp(name, "transports") == 0)
2656 {
2657 type = US"transport";
2658 name = NULL;
2659 }
2660
2661 else if (Ustrcmp(name, "authenticators") == 0)
2662 {
2663 type = US"authenticator";
2664 name = NULL;
2665 }
2666
2667 else if (Ustrcmp(name, "macros") == 0)
2668 {
2669 type = US"macro";
2670 name = NULL;
2671 }
2672
2673 else if (Ustrcmp(name, "router_list") == 0)
2674 {
2675 type = US"router";
2676 name = NULL;
2677 names_only = TRUE;
2678 }
2679
2680 else if (Ustrcmp(name, "transport_list") == 0)
2681 {
2682 type = US"transport";
2683 name = NULL;
2684 names_only = TRUE;
2685 }
2686
2687 else if (Ustrcmp(name, "authenticator_list") == 0)
2688 {
2689 type = US"authenticator";
2690 name = NULL;
2691 names_only = TRUE;
2692 }
2693
2694 else if (Ustrcmp(name, "macro_list") == 0)
2695 {
2696 type = US"macro";
2697 name = NULL;
2698 names_only = TRUE;
2699 }
2700
2701 else
2702 {
2703 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2704 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2705 return;
2706 }
2707 }
2708
2709 /* Handle the options for a router or transport. Skip options that are flagged
2710 as hidden. Some of these are options with names starting with '*', used for
2711 internal alternative representations of other options (which the printing
2712 function will sort out). Others are synonyms kept for backward compatibility.
2713 */
2714
2715 if (Ustrcmp(type, "router") == 0)
2716 {
2717 d = (driver_instance *)routers;
2718 ol2 = optionlist_routers;
2719 size = optionlist_routers_size;
2720 }
2721 else if (Ustrcmp(type, "transport") == 0)
2722 {
2723 d = (driver_instance *)transports;
2724 ol2 = optionlist_transports;
2725 size = optionlist_transports_size;
2726 }
2727 else if (Ustrcmp(type, "authenticator") == 0)
2728 {
2729 d = (driver_instance *)auths;
2730 ol2 = optionlist_auths;
2731 size = optionlist_auths_size;
2732 }
2733
2734 else if (Ustrcmp(type, "macro") == 0)
2735 {
2736 /* People store passwords in macros and they were previously not available
2737 for printing. So we have an admin_users restriction. */
2738 if (!admin_user)
2739 {
2740 fprintf(stderr, "exim: permission denied\n");
2741 exit(EXIT_FAILURE);
2742 }
2743 for (m = macros; m != NULL; m = m->next)
2744 {
2745 if (name == NULL || Ustrcmp(name, m->name) == 0)
2746 {
2747 if (names_only)
2748 printf("%s\n", CS m->name);
2749 else
2750 printf("%s=%s\n", CS m->name, CS m->replacement);
2751 if (name != NULL)
2752 return;
2753 }
2754 }
2755 if (name != NULL)
2756 printf("%s %s not found\n", type, name);
2757 return;
2758 }
2759
2760 if (names_only)
2761 {
2762 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2763 return;
2764 }
2765
2766 /* Either search for a given driver, or print all of them */
2767
2768 for (; d != NULL; d = d->next)
2769 {
2770 if (name == NULL)
2771 printf("\n%s %s:\n", d->name, type);
2772 else if (Ustrcmp(d->name, name) != 0) continue;
2773
2774 for (ol = ol2; ol < ol2 + size; ol++)
2775 {
2776 if ((ol->type & opt_hidden) == 0)
2777 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2778 }
2779
2780 for (ol = d->info->options;
2781 ol < d->info->options + *(d->info->options_count); ol++)
2782 {
2783 if ((ol->type & opt_hidden) == 0)
2784 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2785 }
2786 if (name != NULL) return;
2787 }
2788 if (name != NULL) printf("%s %s not found\n", type, name);
2789 }
2790
2791
2792
2793 /*************************************************
2794 * Read a named list item *
2795 *************************************************/
2796
2797 /* This function reads a name and a list (i.e. string). The name is used to
2798 save the list in a tree, sorted by its name. Each entry also has a number,
2799 which can be used for caching tests, but if the string contains any expansion
2800 items other than $key, the number is set negative to inhibit caching. This
2801 mechanism is used for domain, host, and address lists that are referenced by
2802 the "+name" syntax.
2803
2804 Arguments:
2805 anchorp points to the tree anchor
2806 numberp points to the current number for this tree
2807 max the maximum number permitted
2808 s the text of the option line, starting immediately after the name
2809 of the list type
2810 tname the name of the list type, for messages
2811
2812 Returns: nothing
2813 */
2814
2815 static void
2816 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2817 uschar *tname)
2818 {
2819 BOOL forcecache = FALSE;
2820 uschar *ss;
2821 tree_node *t;
2822 namedlist_block *nb = store_get(sizeof(namedlist_block));
2823
2824 if (Ustrncmp(s, "_cache", 6) == 0)
2825 {
2826 forcecache = TRUE;
2827 s += 6;
2828 }
2829
2830 if (!isspace(*s))
2831 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2832
2833 if (*numberp >= max)
2834 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2835 tname, max);
2836
2837 while (isspace(*s)) s++;
2838 ss = s;
2839 while (isalnum(*s) || *s == '_') s++;
2840 t = store_get(sizeof(tree_node) + s-ss);
2841 Ustrncpy(t->name, ss, s-ss);
2842 t->name[s-ss] = 0;
2843 while (isspace(*s)) s++;
2844
2845 if (!tree_insertnode(anchorp, t))
2846 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2847 "duplicate name \"%s\" for a named %s", t->name, tname);
2848
2849 t->data.ptr = nb;
2850 nb->number = *numberp;
2851 *numberp += 1;
2852
2853 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2854 "missing '=' after \"%s\"", t->name);
2855 while (isspace(*s)) s++;
2856 nb->string = read_string(s, t->name);
2857 nb->cache_data = NULL;
2858
2859 /* Check the string for any expansions; if any are found, mark this list
2860 uncacheable unless the user has explicited forced caching. */
2861
2862 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2863 }
2864
2865
2866
2867
2868 /*************************************************
2869 * Unpick data for a rate limit *
2870 *************************************************/
2871
2872 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2873 separate values.
2874
2875 Arguments:
2876 s string, in the form t,b,f,l
2877 where t is the threshold (integer)
2878 b is the initial delay (time)
2879 f is the multiplicative factor (fixed point)
2880 k is the maximum time (time)
2881 threshold where to store threshold
2882 base where to store base in milliseconds
2883 factor where to store factor in milliseconds
2884 limit where to store limit
2885
2886 Returns: nothing (panics on error)
2887 */
2888
2889 static void
2890 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2891 int *limit)
2892 {
2893 uschar bstring[16], lstring[16];
2894
2895 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2896 factor, lstring) == 4)
2897 {
2898 *base = readconf_readtime(bstring, 0, TRUE);
2899 *limit = readconf_readtime(lstring, 0, TRUE);
2900 if (*base >= 0 && *limit >= 0) return;
2901 }
2902 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2903 }
2904
2905
2906
2907
2908 /*************************************************
2909 * Drop privs for checking TLS config *
2910 *************************************************/
2911
2912 /* We want to validate TLS options during readconf, but do not want to be
2913 root when we call into the TLS library, in case of library linkage errors
2914 which cause segfaults; before this check, those were always done as the Exim
2915 runtime user and it makes sense to continue with that.
2916
2917 Assumes: tls_require_ciphers has been set, if it will be
2918 exim_user has been set, if it will be
2919 exim_group has been set, if it will be
2920
2921 Returns: bool for "okay"; false will cause caller to immediately exit.
2922 */
2923
2924 #ifdef SUPPORT_TLS
2925 static BOOL
2926 tls_dropprivs_validate_require_cipher(void)
2927 {
2928 const uschar *errmsg;
2929 pid_t pid;
2930 int rc, status;
2931 void (*oldsignal)(int);
2932
2933 /* If TLS will never be used, no point checking ciphers */
2934
2935 if ( !tls_advertise_hosts
2936 || !*tls_advertise_hosts
2937 || Ustrcmp(tls_advertise_hosts, ":") == 0
2938 )
2939 return TRUE;
2940 else if (!tls_certificate)
2941 log_write(0, LOG_MAIN|LOG_PANIC,
2942 "Warning: No server certificate defined; TLS connections will fail.\n"
2943 " Suggested action: either install a certificate or change tls_advertise_hosts option");
2944
2945 oldsignal = signal(SIGCHLD, SIG_DFL);
2946
2947 fflush(NULL);
2948 if ((pid = fork()) < 0)
2949 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2950
2951 if (pid == 0)
2952 {
2953 /* in some modes, will have dropped privilege already */
2954 if (!geteuid())
2955 exim_setugid(exim_uid, exim_gid, FALSE,
2956 US"calling tls_validate_require_cipher");
2957
2958 errmsg = tls_validate_require_cipher();
2959 if (errmsg)
2960 {
2961 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2962 "tls_require_ciphers invalid: %s", errmsg);
2963 }
2964 fflush(NULL);
2965 _exit(0);
2966 }
2967
2968 do {
2969 rc = waitpid(pid, &status, 0);
2970 } while (rc < 0 && errno == EINTR);
2971
2972 DEBUG(D_tls)
2973 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2974 (int)pid, status);
2975
2976 signal(SIGCHLD, oldsignal);
2977
2978 return status == 0;
2979 }
2980 #endif /* SUPPORT_TLS */
2981
2982
2983
2984
2985 /*************************************************
2986 * Read main configuration options *
2987 *************************************************/
2988
2989 /* This function is the first to be called for configuration reading. It
2990 opens the configuration file and reads general configuration settings until
2991 it reaches the end of the configuration section. The file is then left open so
2992 that the remaining configuration data can subsequently be read if needed for
2993 this run of Exim.
2994
2995 The configuration file must be owned either by root or exim, and be writeable
2996 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2997 in the config file, so the test is done on the compiled in values. A slight
2998 anomaly, to be carefully documented.
2999
3000 The name of the configuration file is taken from a list that is included in the
3001 binary of Exim. It can be altered from the command line, but if that is done,
3002 root privilege is immediately withdrawn unless the caller is root or exim.
3003 The first file on the list that exists is used.
3004
3005 For use on multiple systems that share file systems, first look for a
3006 configuration file whose name has the current node name on the end. If that is
3007 not found, try the generic name. For really contorted configurations, that run
3008 multiple Exims with different uid settings, first try adding the effective uid
3009 before the node name. These complications are going to waste resources on most
3010 systems. Therefore they are available only when requested by compile-time
3011 options. */
3012
3013 void
3014 readconf_main(void)
3015 {
3016 int sep = 0;
3017 struct stat statbuf;
3018 uschar *s, *filename;
3019 const uschar *list = config_main_filelist;
3020
3021 /* Loop through the possible file names */
3022
3023 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
3024 != NULL)
3025 {
3026 /* Cut out all the fancy processing unless specifically wanted */
3027
3028 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3029 uschar *suffix = filename + Ustrlen(filename);
3030
3031 /* Try for the node-specific file if a node name exists */
3032
3033 #ifdef CONFIGURE_FILE_USE_NODE
3034 struct utsname uts;
3035 if (uname(&uts) >= 0)
3036 {
3037 #ifdef CONFIGURE_FILE_USE_EUID
3038 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3039 config_file = Ufopen(filename, "rb");
3040 if (config_file == NULL)
3041 #endif /* CONFIGURE_FILE_USE_EUID */
3042 {
3043 sprintf(CS suffix, ".%.256s", uts.nodename);
3044 config_file = Ufopen(filename, "rb");
3045 }
3046 }
3047 #endif /* CONFIGURE_FILE_USE_NODE */
3048
3049 /* Otherwise, try the generic name, possibly with the euid added */
3050
3051 #ifdef CONFIGURE_FILE_USE_EUID
3052 if (config_file == NULL)
3053 {
3054 sprintf(CS suffix, ".%ld", (long int)original_euid);
3055 config_file = Ufopen(filename, "rb");
3056 }
3057 #endif /* CONFIGURE_FILE_USE_EUID */
3058
3059 /* Finally, try the unadorned name */
3060
3061 if (config_file == NULL)
3062 {
3063 *suffix = 0;
3064 config_file = Ufopen(filename, "rb");
3065 }
3066 #else /* if neither defined */
3067
3068 /* This is the common case when the fancy processing is not included. */
3069
3070 config_file = Ufopen(filename, "rb");
3071 #endif
3072
3073 /* If the file does not exist, continue to try any others. For any other
3074 error, break out (and die). */
3075
3076 if (config_file != NULL || errno != ENOENT) break;
3077 }
3078
3079 /* On success, save the name for verification; config_filename is used when
3080 logging configuration errors (it changes for .included files) whereas
3081 config_main_filename is the name shown by -bP. Failure to open a configuration
3082 file is a serious disaster. */
3083
3084 if (config_file != NULL)
3085 {
3086 uschar *p;
3087 config_filename = config_main_filename = string_copy(filename);
3088
3089 p = Ustrrchr(filename, '/');
3090 config_main_directory = p ? string_copyn(filename, p - filename)
3091 : string_copy(US".");
3092 }
3093 else
3094 {
3095 if (filename == NULL)
3096 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3097 "%s", config_main_filelist);
3098 else
3099 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3100 "configuration file %s", filename));
3101 }
3102
3103 /* Check the status of the file we have opened, if we have retained root
3104 privileges and the file isn't /dev/null (which *should* be 0666). */
3105
3106 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3107 {
3108 if (fstat(fileno(config_file), &statbuf) != 0)
3109 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3110 big_buffer);
3111
3112 if ((statbuf.st_uid != root_uid /* owner not root */
3113 #ifdef CONFIGURE_OWNER
3114 && statbuf.st_uid != config_uid /* owner not the special one */
3115 #endif
3116 ) || /* or */
3117 (statbuf.st_gid != root_gid /* group not root & */
3118 #ifdef CONFIGURE_GROUP
3119 && statbuf.st_gid != config_gid /* group not the special one */
3120 #endif
3121 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3122 /* or */
3123 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3124
3125 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3126 "wrong owner, group, or mode", big_buffer);
3127 }
3128
3129 /* Process the main configuration settings. They all begin with a lower case
3130 letter. If we see something starting with an upper case letter, it is taken as
3131 a macro definition. */
3132
3133 while ((s = get_config_line()) != NULL)
3134 {
3135 if (isupper(s[0])) read_macro_assignment(s);
3136
3137 else if (Ustrncmp(s, "domainlist", 10) == 0)
3138 read_named_list(&domainlist_anchor, &domainlist_count,
3139 MAX_NAMED_LIST, s+10, US"domain list");
3140
3141 else if (Ustrncmp(s, "hostlist", 8) == 0)
3142 read_named_list(&hostlist_anchor, &hostlist_count,
3143 MAX_NAMED_LIST, s+8, US"host list");
3144
3145 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3146 read_named_list(&addresslist_anchor, &addresslist_count,
3147 MAX_NAMED_LIST, s+11, US"address list");
3148
3149 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3150 read_named_list(&localpartlist_anchor, &localpartlist_count,
3151 MAX_NAMED_LIST, s+13, US"local part list");
3152
3153 else
3154 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3155 NULL, US"main option \"%s\" unknown");
3156 }
3157
3158
3159 /* If local_sender_retain is set, local_from_check must be unset. */
3160
3161 if (local_sender_retain && local_from_check)
3162 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3163 "local_sender_retain are set; this combination is not allowed");
3164
3165 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3166 wanted. */
3167
3168 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3169
3170 /* The max retry interval must not be greater than 24 hours. */
3171
3172 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3173
3174 /* remote_max_parallel must be > 0 */
3175
3176 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3177
3178 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3179 start of a new SMTP message. */
3180
3181 freeze_tell_config = freeze_tell;
3182
3183 /* The primary host name may be required for expansion of spool_directory
3184 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3185 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3186 canonize it. Some people like upper case letters in their host names, so we
3187 don't force the case. */
3188
3189 if (primary_hostname == NULL)
3190 {
3191 const uschar *hostname;
3192 struct utsname uts;
3193 if (uname(&uts) < 0)
3194 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3195 hostname = US uts.nodename;
3196
3197 if (Ustrchr(hostname, '.') == NULL)
3198 {
3199 int af = AF_INET;
3200 struct hostent *hostdata;
3201
3202 #if HAVE_IPV6
3203 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3204 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3205 MCL_DOMAIN, TRUE, NULL) != OK))
3206 af = AF_INET6;
3207 #else
3208 af = AF_INET;
3209 #endif
3210
3211 for (;;)
3212 {
3213 #if HAVE_IPV6
3214 #if HAVE_GETIPNODEBYNAME
3215 int error_num;
3216 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3217 #else
3218 hostdata = gethostbyname2(CS hostname, af);
3219 #endif
3220 #else
3221 hostdata = gethostbyname(CS hostname);
3222 #endif
3223
3224 if (hostdata != NULL)
3225 {
3226 hostname = US hostdata->h_name;
3227 break;
3228 }
3229
3230 if (af == AF_INET) break;
3231 af = AF_INET;
3232 }
3233 }
3234
3235 primary_hostname = string_copy(hostname);
3236 }
3237
3238 /* Set up default value for smtp_active_hostname */
3239
3240 smtp_active_hostname = primary_hostname;
3241
3242 /* If spool_directory wasn't set in the build-time configuration, it must have
3243 got set above. Of course, writing to the log may not work if log_file_path is
3244 not set, but it will at least get to syslog or somewhere, with any luck. */
3245
3246 if (*spool_directory == 0)
3247 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3248 "proceed");
3249
3250 /* Expand the spool directory name; it may, for example, contain the primary
3251 host name. Same comment about failure. */
3252
3253 s = expand_string(spool_directory);
3254 if (s == NULL)
3255 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3256 "\"%s\": %s", spool_directory, expand_string_message);
3257 spool_directory = s;
3258
3259 /* Expand log_file_path, which must contain "%s" in any component that isn't
3260 the null string or "syslog". It is also allowed to contain one instance of %D
3261 or %M. However, it must NOT contain % followed by anything else. */
3262
3263 if (*log_file_path != 0)
3264 {
3265 const uschar *ss, *sss;
3266 int sep = ':'; /* Fixed for log file path */
3267 s = expand_string(log_file_path);
3268 if (s == NULL)
3269 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3270 "\"%s\": %s", log_file_path, expand_string_message);
3271
3272 ss = s;
3273 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3274 {
3275 uschar *t;
3276 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3277 t = Ustrstr(sss, "%s");
3278 if (t == NULL)
3279 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3280 "contain \"%%s\"", sss);
3281 *t = 'X';
3282 t = Ustrchr(sss, '%');
3283 if (t != NULL)
3284 {
3285 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3286 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3287 "unexpected \"%%\" character", s);
3288 }
3289 }
3290
3291 log_file_path = s;
3292 }
3293
3294 /* Interpret syslog_facility into an integer argument for 'ident' param to
3295 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3296 leading "log_". */
3297
3298 if (syslog_facility_str != NULL)
3299 {
3300 int i;
3301 uschar *s = syslog_facility_str;
3302
3303 if ((Ustrlen(syslog_facility_str) >= 4) &&
3304 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3305 s += 4;
3306
3307 for (i = 0; i < syslog_list_size; i++)
3308 {
3309 if (strcmpic(s, syslog_list[i].name) == 0)
3310 {
3311 syslog_facility = syslog_list[i].value;
3312 break;
3313 }
3314 }
3315
3316 if (i >= syslog_list_size)
3317 {
3318 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3319 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3320 }
3321 }
3322
3323 /* Expand pid_file_path */
3324
3325 if (*pid_file_path != 0)
3326 {
3327 s = expand_string(pid_file_path);
3328 if (s == NULL)
3329 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3330 "\"%s\": %s", pid_file_path, expand_string_message);
3331 pid_file_path = s;
3332 }
3333
3334 /* Set default value of process_log_path */
3335
3336 if (process_log_path == NULL || *process_log_path =='\0')
3337 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3338
3339 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3340 message. */
3341
3342 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3343
3344 /* Unpick the SMTP rate limiting options, if set */
3345
3346 if (smtp_ratelimit_mail != NULL)
3347 {
3348 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3349 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3350 }
3351
3352 if (smtp_ratelimit_rcpt != NULL)
3353 {
3354 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3355 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3356 }
3357
3358 /* The qualify domains default to the primary host name */
3359
3360 if (qualify_domain_sender == NULL)
3361 qualify_domain_sender = primary_hostname;
3362 if (qualify_domain_recipient == NULL)
3363 qualify_domain_recipient = qualify_domain_sender;
3364
3365 /* Setting system_filter_user in the configuration sets the gid as well if a
3366 name is given, but a numerical value does not. */
3367
3368 if (system_filter_uid_set && !system_filter_gid_set)
3369 {
3370 struct passwd *pw = getpwuid(system_filter_uid);
3371 if (pw == NULL)
3372 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3373 (long int)system_filter_uid);
3374 system_filter_gid = pw->pw_gid;
3375 system_filter_gid_set = TRUE;
3376 }
3377
3378 /* If the errors_reply_to field is set, check that it is syntactically valid
3379 and ensure it contains a domain. */
3380
3381 if (errors_reply_to != NULL)
3382 {
3383 uschar *errmess;
3384 int start, end, domain;
3385 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3386 &start, &end, &domain, FALSE);
3387
3388 if (recipient == NULL)
3389 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3390 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3391
3392 if (domain == 0)
3393 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3394 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3395 }
3396
3397 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3398 smtp_accept_max must also be set. */
3399
3400 if (smtp_accept_max == 0 &&
3401 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3403 "smtp_accept_max must be set if smtp_accept_queue or "
3404 "smtp_accept_max_per_host is set");
3405
3406 /* Set up the host number if anything is specified. It is an expanded string
3407 so that it can be computed from the host name, for example. We do this last
3408 so as to ensure that everything else is set up before the expansion. */
3409
3410 if (host_number_string != NULL)
3411 {
3412 long int n;
3413 uschar *end;
3414 uschar *s = expand_string(host_number_string);
3415 if (s == NULL)
3416 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3417 "failed to expand localhost_number \"%s\": %s",
3418 host_number_string, expand_string_message);
3419 n = Ustrtol(s, &end, 0);
3420 while (isspace(*end)) end++;
3421 if (*end != 0)
3422 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3423 "localhost_number value is not a number: %s", s);
3424 if (n > LOCALHOST_MAX)
3425 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3426 "localhost_number is greater than the maximum allowed value (%d)",
3427 LOCALHOST_MAX);
3428 host_number = n;
3429 }
3430
3431 #ifdef SUPPORT_TLS
3432 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3433
3434 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3435 tls_verify_certificates == NULL)
3436 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3437 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3438 (tls_verify_hosts != NULL)? "" : "try_");
3439
3440 /* This also checks that the library linkage is working and we can call
3441 routines in it, so call even if tls_require_ciphers is unset */
3442 if (!tls_dropprivs_validate_require_cipher())
3443 exit(1);
3444
3445 /* Magic number: at time of writing, 1024 has been the long-standing value
3446 used by so many clients, and what Exim used to use always, that it makes
3447 sense to just min-clamp this max-clamp at that. */
3448 if (tls_dh_max_bits < 1024)
3449 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3450 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3451
3452 /* If openssl_options is set, validate it */
3453 if (openssl_options != NULL)
3454 {
3455 # ifdef USE_GNUTLS
3456 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3457 "openssl_options is set but we're using GnuTLS");
3458 # else
3459 long dummy;
3460 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3461 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3462 "openssl_options parse error: %s", openssl_options);
3463 # endif
3464 }
3465
3466 if (gnutls_require_kx || gnutls_require_mac || gnutls_require_proto)
3467 log_write(0, LOG_MAIN, "WARNING: main options"
3468 " gnutls_require_kx, gnutls_require_mac and gnutls_require_protocols"
3469 " are obsolete\n");
3470 #endif /*SUPPORT_TLS*/
3471 }
3472
3473
3474
3475 /*************************************************
3476 * Initialize one driver *
3477 *************************************************/
3478
3479 /* This is called once the driver's generic options, if any, have been read.
3480 We can now find the driver, set up defaults for the private options, and
3481 unset any "set" bits in the private options table (which might have been
3482 set by another incarnation of the same driver).
3483
3484 Arguments:
3485 d pointer to driver instance block, with generic
3486 options filled in
3487 drivers_available vector of available drivers
3488 size_of_info size of each block in drivers_available
3489 class class of driver, for error message
3490
3491 Returns: pointer to the driver info block
3492 */
3493
3494 static driver_info *
3495 init_driver(driver_instance *d, driver_info *drivers_available,
3496 int size_of_info, uschar *class)
3497 {
3498 driver_info *dd;
3499
3500 for (dd = drivers_available; dd->driver_name[0] != 0;
3501 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3502 {
3503 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3504 {
3505 int i;
3506 int len = dd->options_len;
3507 d->info = dd;
3508 d->options_block = store_get(len);
3509 memcpy(d->options_block, dd->options_block, len);
3510 for (i = 0; i < *(dd->options_count); i++)
3511 dd->options[i].type &= ~opt_set;
3512 return dd;
3513 }
3514 }
3515
3516 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3517 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3518
3519 return NULL; /* never obeyed */
3520 }
3521
3522
3523
3524
3525 /*************************************************
3526 * Initialize driver list *
3527 *************************************************/
3528
3529 /* This function is called for routers, transports, and authentication
3530 mechanisms. It reads the data from the current point in the configuration file
3531 up to the end of the section, and sets up a chain of instance blocks according
3532 to the file's contents. The file will already have been opened by a call to
3533 readconf_main, and must be left open for subsequent reading of further data.
3534
3535 Any errors cause a panic crash. Note that the blocks with names driver_info and
3536 driver_instance must map the first portions of all the _info and _instance
3537 blocks for this shared code to work.
3538
3539 Arguments:
3540 class "router", "transport", or "authenticator"
3541 anchor &routers, &transports, &auths
3542 drivers_available available drivers
3543 size_of_info size of each info block
3544 instance_default points to default data for an instance
3545 instance_size size of instance block
3546 driver_optionlist generic option list
3547 driver_optionlist_count count of generic option list
3548
3549 Returns: nothing
3550 */
3551
3552 void
3553 readconf_driver_init(
3554 uschar *class,
3555 driver_instance **anchor,
3556 driver_info *drivers_available,
3557 int size_of_info,
3558 void *instance_default,
3559 int instance_size,
3560 optionlist *driver_optionlist,
3561 int driver_optionlist_count)
3562 {
3563 driver_instance **p = anchor;
3564 driver_instance *d = NULL;
3565 uschar *buffer;
3566
3567 while ((buffer = get_config_line()) != NULL)
3568 {
3569 uschar name[64];
3570 uschar *s;
3571
3572 /* Read the first name on the line and test for the start of a new driver. A
3573 macro definition indicates the end of the previous driver. If this isn't the
3574 start of a new driver, the line will be re-read. */
3575
3576 s = readconf_readname(name, sizeof(name), buffer);
3577
3578 /* Handle macro definition, first finishing off the initialization of the
3579 previous driver, if any. */
3580
3581 if (isupper(*name) && *s == '=')
3582 {
3583 if (d != NULL)
3584 {
3585 if (d->driver_name == NULL)
3586 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3587 "no driver defined for %s \"%s\"", class, d->name);
3588 (d->info->init)(d);
3589 d = NULL;
3590 }
3591 read_macro_assignment(buffer);
3592 continue;
3593 }
3594
3595 /* If the line starts with a name terminated by a colon, we are at the
3596 start of the definition of a new driver. The rest of the line must be
3597 blank. */
3598
3599 if (*s++ == ':')
3600 {
3601 int i;
3602
3603 /* Finish off initializing the previous driver. */
3604
3605 if (d != NULL)
3606 {
3607 if (d->driver_name == NULL)
3608 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3609 "no driver defined for %s \"%s\"", class, d->name);
3610 (d->info->init)(d);
3611 }
3612
3613 /* Check that we haven't already got a driver of this name */
3614
3615 for (d = *anchor; d != NULL; d = d->next)
3616 if (Ustrcmp(name, d->name) == 0)
3617 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3618 "there are two %ss called \"%s\"", class, name);
3619
3620 /* Set up a new driver instance data block on the chain, with
3621 its default values installed. */
3622
3623 d = store_get(instance_size);
3624 memcpy(d, instance_default, instance_size);
3625 *p = d;
3626 p = &(d->next);
3627 d->name = string_copy(name);
3628
3629 /* Clear out the "set" bits in the generic options */
3630
3631 for (i = 0; i < driver_optionlist_count; i++)
3632 driver_optionlist[i].type &= ~opt_set;
3633
3634 /* Check nothing more on this line, then do the next loop iteration. */
3635
3636 while (isspace(*s)) s++;
3637 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3638 continue;
3639 }
3640
3641 /* Not the start of a new driver. Give an error if we have not set up a
3642 current driver yet. */
3643
3644 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3645 "%s name missing", class);
3646
3647 /* First look to see if this is a generic option; if it is "driver",
3648 initialize the driver. If is it not a generic option, we can look for a
3649 private option provided that the driver has been previously set up. */
3650
3651 if (readconf_handle_option(buffer, driver_optionlist,
3652 driver_optionlist_count, d, NULL))
3653 {
3654 if (d->info == NULL && d->driver_name != NULL)
3655 init_driver(d, drivers_available, size_of_info, class);
3656 }
3657
3658 /* Handle private options - pass the generic block because some may
3659 live therein. A flag with each option indicates if it is in the public
3660 block. */
3661
3662 else if (d->info != NULL)
3663 {
3664 readconf_handle_option(buffer, d->info->options,
3665 *(d->info->options_count), d, US"option \"%s\" unknown");
3666 }
3667
3668 /* The option is not generic and the driver name has not yet been given. */
3669
3670 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3671 "(\"driver\" must be specified before any private options)", name);
3672 }
3673
3674 /* Run the initialization function for the final driver. */
3675
3676 if (d != NULL)
3677 {
3678 if (d->driver_name == NULL)
3679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3680 "no driver defined for %s \"%s\"", class, d->name);
3681 (d->info->init)(d);
3682 }
3683 }
3684
3685
3686
3687 /*************************************************
3688 * Check driver dependency *
3689 *************************************************/
3690
3691 /* This function is passed a driver instance and a string. It checks whether
3692 any of the string options for the driver contains the given string as an
3693 expansion variable.
3694
3695 Arguments:
3696 d points to a driver instance block
3697 s the string to search for
3698
3699 Returns: TRUE if a dependency is found
3700 */
3701
3702 BOOL
3703 readconf_depends(driver_instance *d, uschar *s)
3704 {
3705 int count = *(d->info->options_count);
3706 optionlist *ol;
3707 uschar *ss;
3708
3709 for (ol = d->info->options; ol < d->info->options + count; ol++)
3710 {
3711 void *options_block;
3712 uschar *value;
3713 int type = ol->type & opt_mask;
3714 if (type != opt_stringptr) continue;
3715 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3716 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3717 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3718 {
3719 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3720 isalnum(ss[Ustrlen(s)])) continue;
3721 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3722 d->name, ol->name, s);
3723 return TRUE;
3724 }
3725 }
3726
3727 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3728 return FALSE;
3729 }
3730
3731
3732
3733
3734 /*************************************************
3735 * Decode an error type for retries *
3736 *************************************************/
3737
3738 /* This function is global because it is also called from the main
3739 program when testing retry information. It decodes strings such as "quota_7d"
3740 into numerical error codes.
3741
3742 Arguments:
3743 pp points to start of text
3744 p points past end of text
3745 basic_errno points to an int to receive the main error number
3746 more_errno points to an int to receive the secondary error data
3747
3748 Returns: NULL if decoded correctly; else points to error text
3749 */
3750
3751 uschar *
3752 readconf_retry_error(const uschar *pp, const uschar *p,
3753 int *basic_errno, int *more_errno)
3754 {
3755 int len;
3756 const uschar *q = pp;
3757 while (q < p && *q != '_') q++;
3758 len = q - pp;
3759
3760 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3761 {
3762 *basic_errno = ERRNO_EXIMQUOTA;
3763 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3764 return US"bad time value";
3765 }
3766
3767 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3768 {
3769 *basic_errno = ECONNREFUSED;
3770 if (q != p)
3771 {
3772 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3773 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3774 else return US"A or MX expected after \"refused\"";
3775 }
3776 }
3777
3778 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3779 {
3780 *basic_errno = ETIMEDOUT;
3781 if (q != p)
3782 {
3783 int i;
3784 int xlen = p - q - 1;
3785 const uschar *x = q + 1;
3786
3787 static uschar *extras[] =
3788 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3789 static int values[] =
3790 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3791
3792 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3793 if (strncmpic(x, extras[i], xlen) == 0)
3794 {
3795 *more_errno = values[i];
3796 break;
3797 }
3798
3799 if (i >= sizeof(extras)/sizeof(uschar *))
3800 if (strncmpic(x, US"DNS", xlen) == 0)
3801 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3802 "available in retry rules (it has never worked) - treated as "
3803 "\"timeout\"");
3804 else
3805 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3806 }
3807 }
3808
3809 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3810 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3811 strncmpic(pp, US"data_4", 6) == 0)
3812 {
3813 BOOL bad = FALSE;
3814 int x = 255; /* means "any 4xx code" */
3815 if (p != pp + 8) bad = TRUE; else
3816 {
3817 int a = pp[6], b = pp[7];
3818 if (isdigit(a))
3819 {
3820 x = (a - '0') * 10;
3821 if (isdigit(b)) x += b - '0';
3822 else if (b == 'x') x += 100;
3823 else bad = TRUE;
3824 }
3825 else if (a != 'x' || b != 'x') bad = TRUE;
3826 }
3827
3828 if (bad)
3829 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3830 "x is literal and d is any digit", pp);
3831
3832 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
3833 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3834 *more_errno = x << 8;
3835 }
3836
3837 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3838 strncmpic(q+1, US"failed", p-q-1) == 0)
3839 *basic_errno = ERRNO_AUTHFAIL;
3840
3841 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3842 *basic_errno = ERRNO_SMTPCLOSED;
3843
3844 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3845 *basic_errno = ERRNO_TLSREQUIRED;
3846
3847 else if (strncmpic(pp, US"lookup", p - pp) == 0)
3848 *basic_errno = ERRNO_UNKNOWNHOST;
3849
3850 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3851 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3852
3853 return NULL;
3854 }
3855
3856
3857
3858
3859 /*************************************************
3860 * Read retry information *
3861 *************************************************/
3862
3863 /* Each line of retry information contains:
3864
3865 . A domain name pattern or an address pattern;
3866
3867 . An error name, possibly with additional data, or *;
3868
3869 . An optional sequence of retry items, each consisting of an identifying
3870 letter, a cutoff time, and optional parameters.
3871
3872 All this is decoded and placed into a control block. */
3873
3874
3875 /* Subroutine to read an argument, preceded by a comma and terminated
3876 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3877 1 = fixed point number (returned *1000).
3878
3879 Arguments:
3880 paddr pointer to pointer to current character; updated
3881 type 0 => read a time; 1 => read a fixed point number
3882
3883 Returns: time in seconds or fixed point number * 1000
3884 */
3885
3886 static int
3887 retry_arg(const uschar **paddr, int type)
3888 {
3889 const uschar *p = *paddr;
3890 const uschar *pp;
3891
3892 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3893
3894 while (isspace(*p)) p++;
3895 pp = p;
3896 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3897
3898 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3899 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3900
3901 *paddr = p;
3902 switch (type)
3903 {
3904 case 0: return readconf_readtime(pp, *p, FALSE);
3905 case 1: return readconf_readfixed(pp, *p);
3906 }
3907 return 0; /* Keep picky compilers happy */
3908 }
3909
3910 /* The function proper */
3911
3912 void
3913 readconf_retries(void)
3914 {
3915 retry_config **chain = &retries;
3916 retry_config *next;
3917 const uschar *p;
3918
3919 while ((p = get_config_line()))
3920 {
3921 retry_rule **rchain;
3922 const uschar *pp;
3923 uschar *error;
3924
3925 next = store_get(sizeof(retry_config));
3926 next->next = NULL;
3927 *chain = next;
3928 chain = &(next->next);
3929 next->basic_errno = next->more_errno = 0;
3930 next->senders = NULL;
3931 next->rules = NULL;
3932 rchain = &(next->rules);
3933
3934 next->pattern = string_dequote(&p);
3935 while (isspace(*p)) p++;
3936 pp = p;
3937 while (mac_isgraph(*p)) p++;
3938 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3939 "missing error type in retry rule");
3940
3941 /* Test error names for things we understand. */
3942
3943 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
3944 &next->more_errno)))
3945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3946
3947 /* There may be an optional address list of senders to be used as another
3948 constraint on the rule. This was added later, so the syntax is a bit of a
3949 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3950 an address list. */
3951
3952 while (isspace(*p)) p++;
3953 if (Ustrncmp(p, "senders", 7) == 0)
3954 {
3955 p += 7;
3956 while (isspace(*p)) p++;
3957 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3958 "\"=\" expected after \"senders\" in retry rule");
3959 while (isspace(*p)) p++;
3960 next->senders = string_dequote(&p);
3961 }
3962
3963 /* Now the retry rules. Keep the maximum timeout encountered. */
3964
3965 while (isspace(*p)) p++;
3966
3967 while (*p != 0)
3968 {
3969 retry_rule *rule = store_get(sizeof(retry_rule));
3970 *rchain = rule;
3971 rchain = &(rule->next);
3972 rule->next = NULL;
3973 rule->rule = toupper(*p++);
3974 rule->timeout = retry_arg(&p, 0);
3975 if (rule->timeout > retry_maximum_timeout)
3976 retry_maximum_timeout = rule->timeout;
3977
3978 switch (rule->rule)
3979 {
3980 case 'F': /* Fixed interval */
3981 rule->p1 = retry_arg(&p, 0);
3982 break;
3983
3984 case 'G': /* Geometrically increasing intervals */
3985 case 'H': /* Ditto, but with randomness */
3986 rule->p1 = retry_arg(&p, 0);
3987 rule->p2 = retry_arg(&p, 1);
3988 break;
3989
3990 default:
3991 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3992 break;
3993 }
3994
3995 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3996 (rule->rule != 'F' && rule->p2 < 1000))
3997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3998 "bad parameters for retry rule");
3999
4000 while (isspace(*p)) p++;
4001 if (*p == ';')
4002 {
4003 p++;
4004 while (isspace(*p)) p++;
4005 }
4006 else if (*p != 0)
4007 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4008 }
4009 }
4010 }
4011
4012
4013
4014 /*************************************************
4015 * Initialize authenticators *
4016 *************************************************/
4017
4018 /* Read the authenticators section of the configuration file.
4019
4020 Arguments: none
4021 Returns: nothing
4022 */
4023
4024 static void
4025 auths_init(void)
4026 {
4027 auth_instance *au, *bu;
4028 readconf_driver_init(US"authenticator",
4029 (driver_instance **)(&auths), /* chain anchor */
4030 (driver_info *)auths_available, /* available drivers */
4031 sizeof(auth_info), /* size of info block */
4032 &auth_defaults, /* default values for generic options */
4033 sizeof(auth_instance), /* size of instance block */
4034 optionlist_auths, /* generic options */
4035 optionlist_auths_size);
4036
4037 for (au = auths; au != NULL; au = au->next)
4038 {
4039 if (au->public_name == NULL)
4040 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4041 "the %s authenticator", au->name);
4042 for (bu = au->next; bu != NULL; bu = bu->next)
4043 {
4044 if (strcmpic(au->public_name, bu->public_name) == 0)
4045 {
4046 if ((au->client && bu->client) || (au->server && bu->server))
4047 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4048 "(%s and %s) have the same public name (%s)",
4049 (au->client)? US"client" : US"server", au->name, bu->name,
4050 au->public_name);
4051 }
4052 }
4053 }
4054 }
4055
4056
4057
4058
4059 /*************************************************
4060 * Read ACL information *
4061 *************************************************/
4062
4063 /* If this run of Exim is not doing something that involves receiving a
4064 message, we can just skip over the ACL information. No need to parse it.
4065
4066 First, we have a function for acl_read() to call back to get the next line. We
4067 need to remember the line we passed, because at the end it will contain the
4068 name of the next ACL. */
4069
4070 static uschar *acl_line;
4071
4072 static uschar *
4073 acl_callback(void)
4074 {
4075 acl_line = get_config_line();
4076 return acl_line;
4077 }
4078
4079
4080 /* Now the main function:
4081
4082 Arguments: none
4083 Returns: nothing
4084 */
4085
4086 static void
4087 readconf_acl(void)
4088 {
4089 uschar *p;
4090
4091 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4092 between ACLs. */
4093
4094 acl_line = get_config_line();
4095
4096 while(acl_line != NULL)
4097 {
4098 uschar name[64];
4099 tree_node *node;
4100 uschar *error;
4101
4102 p = readconf_readname(name, sizeof(name), acl_line);
4103 if (isupper(*name) && *p == '=')
4104 {
4105 read_macro_assignment(acl_line);
4106 acl_line = get_config_line();
4107 continue;
4108 }
4109
4110 if (*p != ':' || name[0] == 0)
4111 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4112
4113 node = store_get(sizeof(tree_node) + Ustrlen(name));
4114 Ustrcpy(node->name, name);
4115 if (!tree_insertnode(&acl_anchor, node))
4116 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4117 "there are two ACLs called \"%s\"", name);
4118
4119 node->data.ptr = acl_read(acl_callback, &error);
4120
4121 if (node->data.ptr == NULL && error != NULL)
4122 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4123 }
4124 }
4125
4126
4127
4128 /*************************************************
4129 * Read configuration for local_scan() *
4130 *************************************************/
4131
4132 /* This function is called after "begin local_scan" is encountered in the
4133 configuration file. If the local_scan() function allows for configuration
4134 options, we can process them. Otherwise, we expire in a panic.
4135
4136 Arguments: none
4137 Returns: nothing
4138 */
4139
4140 static void
4141 local_scan_init(void)
4142 {
4143 #ifndef LOCAL_SCAN_HAS_OPTIONS
4144 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4145 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4146 #else
4147
4148 uschar *p;
4149 while ((p = get_config_line()) != NULL)
4150 {
4151 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4152 NULL, US"local_scan option \"%s\" unknown");
4153 }
4154 #endif
4155 }
4156
4157
4158
4159 /*************************************************
4160 * Read rest of configuration (after main) *
4161 *************************************************/
4162
4163 /* This function reads the rest of the runtime configuration, after the main
4164 configuration. It is called only when actually needed. Each subsequent section
4165 of the configuration starts with a line of the form
4166
4167 begin name
4168
4169 where the name is "routers", "transports", etc. A section is terminated by
4170 hitting the next "begin" line, and the next name is left in next_section.
4171 Because it may confuse people as to whether the names are singular or plural,
4172 we add "s" if it's missing. There is always enough room in next_section for
4173 this. This function is basically just a switch.
4174
4175 Arguments: none
4176 Returns: nothing
4177 */
4178
4179 static uschar *section_list[] = {
4180 US"acls",
4181 US"authenticators",
4182 US"local_scans",
4183 US"retrys",
4184 US"rewrites",
4185 US"routers",
4186 US"transports"};
4187
4188 void
4189 readconf_rest(void)
4190 {
4191 int had = 0;
4192
4193 while(next_section[0] != 0)
4194 {
4195 int bit;
4196 int first = 0;
4197 int last = sizeof(section_list) / sizeof(uschar *);
4198 int mid = last/2;
4199 int n = Ustrlen(next_section);
4200
4201 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4202
4203 for (;;)
4204 {
4205 int c = strcmpic(next_section, section_list[mid]);
4206 if (c == 0) break;
4207 if (c > 0) first = mid + 1; else last = mid;
4208 if (first >= last)
4209 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4210 "\"%.*s\" is not a known configuration section name", n, next_section);
4211 mid = (last + first)/2;
4212 }
4213
4214 bit = 1 << mid;
4215 if (((had ^= bit) & bit) == 0)
4216 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4217 "\"%.*s\" section is repeated in the configuration file", n,
4218 next_section);
4219
4220 switch(mid)
4221 {
4222 case 0: readconf_acl(); break;
4223 case 1: auths_init(); break;
4224 case 2: local_scan_init(); break;
4225 case 3: readconf_retries(); break;
4226 case 4: readconf_rewrites(); break;
4227 case 5: route_init(); break;
4228 case 6: transport_init(); break;
4229 }
4230 }
4231
4232 (void)fclose(config_file);
4233 }
4234
4235 /* Init the storage for the pre-parsed config lines */
4236 void
4237 readconf_save_config(const uschar *s)
4238 {
4239 save_config_line(string_sprintf("# Exim Configuration (%s)",
4240 running_in_test_harness ? US"X" : s));
4241 }
4242
4243 static void
4244 save_config_position(const uschar *file, int line)
4245 {
4246 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4247 }
4248
4249 /* Append a pre-parsed logical line to the config lines store,
4250 this operates on a global (static) list that holds all the pre-parsed
4251 config lines, we do no further processing here, output formatting and
4252 honouring of <hide> or macros will be done during output */
4253 static void
4254 save_config_line(const uschar* line)
4255 {
4256 static config_line_item *current;
4257 config_line_item *next;
4258
4259 next = (config_line_item*) store_get(sizeof(config_line_item));
4260 next->line = string_copy(line);
4261 next->next = NULL;
4262
4263 if (!config_lines) config_lines = next;
4264 else current->next = next;
4265
4266 current = next;
4267 }
4268
4269 /* List the parsed config lines, care about nice formatting and
4270 hide the <hide> values unless we're the admin user */
4271 void
4272 print_config(BOOL admin)
4273 {
4274 config_line_item *i;
4275 const int TS = 2;
4276 int indent = 0;
4277
4278 for (i = config_lines; i; i = i->next)
4279 {
4280 uschar *current;
4281 uschar *p;
4282
4283 /* skip over to the first non-space */
4284 for (current = i->line; *current && isspace(*current); ++current)
4285 ;
4286
4287 if (*current == '\0')
4288 continue;
4289
4290 /* Collapse runs of spaces. We stop this if we encounter one of the
4291 * following characters: "'$, as this may indicate careful formatting */
4292 for (p = current; *p; ++p)
4293 {
4294 uschar *next;
4295 if (!isspace(*p)) continue;
4296 if (*p != ' ') *p = ' ';
4297
4298 for (next = p; isspace(*next); ++next)
4299 ;
4300
4301 if (next - p > 1)
4302 memmove(p+1, next, Ustrlen(next)+1);
4303
4304 if (*next == '"' || *next == '\'' || *next == '$')
4305 break;
4306 }
4307
4308 /* # lines */
4309 if (current[0] == '#')
4310 puts(CCS current);
4311
4312 /* begin lines are left aligned */
4313 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4314 {
4315 puts("");
4316 puts(CCS current);
4317 indent = TS;
4318 }
4319
4320 /* router/acl/transport block names */
4321 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4322 {
4323 printf("\n%*s%s\n", TS, "", current);
4324 indent = 2 * TS;
4325 }
4326
4327 /* hidden lines (all MACROS or lines prefixed with "hide") */
4328 else if ( !admin
4329 && ( isupper(*current)
4330 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4331 )
4332 )
4333 {
4334 if ((p = Ustrchr(current, '=')))
4335 {
4336 *p = '\0';
4337 printf("%*s%s= %s\n", indent, "", current, hidden);
4338 }
4339 /* e.g.: hide split_spool_directory */
4340 else
4341 printf("%*s\n", indent, hidden);
4342 }
4343
4344 else
4345 /* rest is public */
4346 printf("%*s%s\n", indent, "", current);
4347 }
4348 }
4349
4350 /* vi: aw ai sw=2
4351 */
4352 /* End of readconf.c */
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