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TLS: retire obsolete options gnutls_require_{kx,mac,proto)
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 extern char **environ;
15
16 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 static void save_config_line(const uschar* line);
18 static void save_config_position(const uschar *file, int line);
19 static void print_config(BOOL admin, BOOL terse);
20
21
22 #define CSTATE_STACK_SIZE 10
23
24
25 /* Structure for chain (stack) of .included files */
26
27 typedef struct config_file_item {
28 struct config_file_item *next;
29 uschar *filename;
30 FILE *file;
31 int lineno;
32 } config_file_item;
33
34 /* Structure for chain of configuration lines (-bP config) */
35
36 typedef struct config_line_item {
37 struct config_line_item *next;
38 uschar *line;
39 } config_line_item;
40
41 static config_line_item* config_lines;
42
43 /* Structure of table of conditional words and their state transitions */
44
45 typedef struct cond_item {
46 uschar *name;
47 int namelen;
48 int action1;
49 int action2;
50 int pushpop;
51 } cond_item;
52
53 /* Structure of table of syslog facility names and values */
54
55 typedef struct syslog_fac_item {
56 uschar *name;
57 int value;
58 } syslog_fac_item;
59
60 /* constants */
61 static const char * const hidden = "<value not displayable>";
62
63 /* Static variables */
64
65 static config_file_item *config_file_stack = NULL; /* For includes */
66
67 static uschar *syslog_facility_str = NULL;
68 static uschar next_section[24];
69 static uschar time_buffer[24];
70
71 /* State variables for conditional loading (.ifdef / .else / .endif) */
72
73 static int cstate = 0;
74 static int cstate_stack_ptr = -1;
75 static int cstate_stack[CSTATE_STACK_SIZE];
76
77 /* Table of state transitions for handling conditional inclusions. There are
78 four possible state transitions:
79
80 .ifdef true
81 .ifdef false
82 .elifdef true (or .else)
83 .elifdef false
84
85 .endif just causes the previous cstate to be popped off the stack */
86
87 static int next_cstate[3][4] =
88 {
89 /* State 0: reading from file, or reading until next .else or .endif */
90 { 0, 1, 2, 2 },
91 /* State 1: condition failed, skipping until next .else or .endif */
92 { 2, 2, 0, 1 },
93 /* State 2: skipping until .endif */
94 { 2, 2, 2, 2 },
95 };
96
97 /* Table of conditionals and the states to set. For each name, there are four
98 values: the length of the name (to save computing it each time), the state to
99 set if a macro was found in the line, the state to set if a macro was not found
100 in the line, and a stack manipulation setting which is:
101
102 -1 pull state value off the stack
103 0 don't alter the stack
104 +1 push value onto stack, before setting new state
105 */
106
107 static cond_item cond_list[] = {
108 { US"ifdef", 5, 0, 1, 1 },
109 { US"ifndef", 6, 1, 0, 1 },
110 { US"elifdef", 7, 2, 3, 0 },
111 { US"elifndef", 8, 3, 2, 0 },
112 { US"else", 4, 2, 2, 0 },
113 { US"endif", 5, 0, 0, -1 }
114 };
115
116 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
117
118 /* Table of syslog facility names and their values */
119
120 static syslog_fac_item syslog_list[] = {
121 { US"mail", LOG_MAIL },
122 { US"user", LOG_USER },
123 { US"news", LOG_NEWS },
124 { US"uucp", LOG_UUCP },
125 { US"local0", LOG_LOCAL0 },
126 { US"local1", LOG_LOCAL1 },
127 { US"local2", LOG_LOCAL2 },
128 { US"local3", LOG_LOCAL3 },
129 { US"local4", LOG_LOCAL4 },
130 { US"local5", LOG_LOCAL5 },
131 { US"local6", LOG_LOCAL6 },
132 { US"local7", LOG_LOCAL7 },
133 { US"daemon", LOG_DAEMON }
134 };
135
136 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
137
138
139
140
141 /*************************************************
142 * Main configuration options *
143 *************************************************/
144
145 /* The list of options that can be set in the main configuration file. This
146 must be in alphabetic order because it is searched by binary chop. */
147
148 static optionlist optionlist_config[] = {
149 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
150 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
151 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
152 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
153 { "accept_8bitmime", opt_bool, &accept_8bitmime },
154 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
155 #ifdef WITH_CONTENT_SCAN
156 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
157 #endif
158 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
159 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
160 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
161 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
162 #ifndef DISABLE_PRDR
163 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
164 #endif
165 #ifndef DISABLE_DKIM
166 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
167 #endif
168 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
169 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
170 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
171 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
172 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
173 #ifdef WITH_CONTENT_SCAN
174 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
175 #endif
176 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
177 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
178 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
179 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
180 #ifdef SUPPORT_TLS
181 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
182 #endif
183 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
184 { "add_environment", opt_stringptr, &add_environment },
185 { "admin_groups", opt_gidlist, &admin_groups },
186 { "allow_domain_literals", opt_bool, &allow_domain_literals },
187 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
188 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
189 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
190 { "auto_thaw", opt_time, &auto_thaw },
191 #ifdef WITH_CONTENT_SCAN
192 { "av_scanner", opt_stringptr, &av_scanner },
193 #endif
194 { "bi_command", opt_stringptr, &bi_command },
195 #ifdef EXPERIMENTAL_BRIGHTMAIL
196 { "bmi_config_file", opt_stringptr, &bmi_config_file },
197 #endif
198 { "bounce_message_file", opt_stringptr, &bounce_message_file },
199 { "bounce_message_text", opt_stringptr, &bounce_message_text },
200 { "bounce_return_body", opt_bool, &bounce_return_body },
201 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
202 { "bounce_return_message", opt_bool, &bounce_return_message },
203 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
204 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
205 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
206 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
207 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
208 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
209 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
210 { "check_log_inodes", opt_int, &check_log_inodes },
211 { "check_log_space", opt_Kint, &check_log_space },
212 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
213 { "check_spool_inodes", opt_int, &check_spool_inodes },
214 { "check_spool_space", opt_Kint, &check_spool_space },
215 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
216 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
217 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
218 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
219 #ifdef EXPERIMENTAL_DCC
220 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
221 { "dccifd_address", opt_stringptr, &dccifd_address },
222 { "dccifd_options", opt_stringptr, &dccifd_options },
223 #endif
224 { "delay_warning", opt_timelist, &delay_warning },
225 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
226 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
227 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
228 { "delivery_date_remove", opt_bool, &delivery_date_remove },
229 #ifdef ENABLE_DISABLE_FSYNC
230 { "disable_fsync", opt_bool, &disable_fsync },
231 #endif
232 { "disable_ipv6", opt_bool, &disable_ipv6 },
233 #ifndef DISABLE_DKIM
234 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
235 #endif
236 #ifdef EXPERIMENTAL_DMARC
237 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
238 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
239 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
240 #endif
241 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
242 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
243 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
244 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
245 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
246 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
247 { "dns_retrans", opt_time, &dns_retrans },
248 { "dns_retry", opt_int, &dns_retry },
249 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
250 { "dns_use_edns0", opt_int, &dns_use_edns0 },
251 /* This option is now a no-op, retained for compability */
252 { "drop_cr", opt_bool, &drop_cr },
253 /*********************************************************/
254 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
255 { "dsn_from", opt_stringptr, &dsn_from },
256 { "envelope_to_remove", opt_bool, &envelope_to_remove },
257 { "errors_copy", opt_stringptr, &errors_copy },
258 { "errors_reply_to", opt_stringptr, &errors_reply_to },
259 #ifndef DISABLE_EVENT
260 { "event_action", opt_stringptr, &event_action },
261 #endif
262 { "exim_group", opt_gid, &exim_gid },
263 { "exim_path", opt_stringptr, &exim_path },
264 { "exim_user", opt_uid, &exim_uid },
265 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
266 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
267 { "finduser_retries", opt_int, &finduser_retries },
268 { "freeze_tell", opt_stringptr, &freeze_tell },
269 { "gecos_name", opt_stringptr, &gecos_name },
270 { "gecos_pattern", opt_stringptr, &gecos_pattern },
271 #ifdef SUPPORT_TLS
272 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
273 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
274 #endif
275 { "header_line_maxsize", opt_int, &header_line_maxsize },
276 { "header_maxsize", opt_int, &header_maxsize },
277 { "headers_charset", opt_stringptr, &headers_charset },
278 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
279 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
280 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
281 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
282 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
283 { "hold_domains", opt_stringptr, &hold_domains },
284 { "host_lookup", opt_stringptr, &host_lookup },
285 { "host_lookup_order", opt_stringptr, &host_lookup_order },
286 { "host_reject_connection", opt_stringptr, &host_reject_connection },
287 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
288 #ifdef SUPPORT_PROXY
289 { "hosts_proxy", opt_stringptr, &hosts_proxy },
290 #endif
291 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
292 #ifdef LOOKUP_IBASE
293 { "ibase_servers", opt_stringptr, &ibase_servers },
294 #endif
295 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
296 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
297 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
298 { "keep_environment", opt_stringptr, &keep_environment },
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 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2039
2040 case opt_Kint:
2041 {
2042 uschar *endptr;
2043 errno = 0;
2044 value = strtol(CS s, CSS &endptr, intbase);
2045
2046 if (endptr == s)
2047 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2048 inttype, name);
2049
2050 if (errno != ERANGE)
2051 {
2052 if (tolower(*endptr) == 'm')
2053 {
2054 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
2055 else value *= 1024;
2056 endptr++;
2057 }
2058 else if (tolower(*endptr) == 'k')
2059 {
2060 endptr++;
2061 }
2062 else
2063 {
2064 value = (value + 512)/1024;
2065 }
2066 }
2067
2068 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2069 "absolute value of integer \"%s\" is too large (overflow)", s);
2070
2071 while (isspace(*endptr)) endptr++;
2072 if (*endptr != 0)
2073 extra_chars_error(endptr, inttype, US"integer value for ", name);
2074 }
2075
2076 if (data_block == NULL)
2077 *((int *)(ol->value)) = value;
2078 else
2079 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2080 break;
2081
2082 /* Fixed-point number: held to 3 decimal places. */
2083
2084 case opt_fixed:
2085 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2086 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2087 "fixed-point number expected for %s", name);
2088
2089 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2090 "integer \"%s\" is too large (overflow)", s);
2091
2092 value *= 1000;
2093
2094 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2095 "integer \"%s\" is too large (overflow)", s);
2096
2097 if (s[count] == '.')
2098 {
2099 int d = 100;
2100 while (isdigit(s[++count]))
2101 {
2102 value += (s[count] - '0') * d;
2103 d /= 10;
2104 }
2105 }
2106
2107 while (isspace(s[count])) count++;
2108
2109 if (s[count] != 0)
2110 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2111
2112 if (data_block == NULL)
2113 *((int *)(ol->value)) = value;
2114 else
2115 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2116 break;
2117
2118 /* There's a special routine to read time values. */
2119
2120 case opt_time:
2121 value = readconf_readtime(s, 0, FALSE);
2122 if (value < 0)
2123 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2124 name);
2125 if (data_block == NULL)
2126 *((int *)(ol->value)) = value;
2127 else
2128 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2129 break;
2130
2131 /* A time list is a list of colon-separated times, with the first
2132 element holding the size of the list and the second the number of
2133 entries used. */
2134
2135 case opt_timelist:
2136 {
2137 int count = 0;
2138 int *list = (data_block == NULL)?
2139 (int *)(ol->value) :
2140 (int *)((uschar *)data_block + (long int)(ol->value));
2141
2142 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2143 {
2144 int terminator = 0;
2145 uschar *snext = Ustrchr(s, ':');
2146 if (snext != NULL)
2147 {
2148 uschar *ss = snext;
2149 while (ss > s && isspace(ss[-1])) ss--;
2150 terminator = *ss;
2151 }
2152 value = readconf_readtime(s, terminator, FALSE);
2153 if (value < 0)
2154 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2155 name);
2156 if (count > 1 && value <= list[count])
2157 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2158 "time value out of order for %s", name);
2159 list[count+1] = value;
2160 if (snext == NULL) break;
2161 s = snext + 1;
2162 while (isspace(*s)) s++;
2163 }
2164
2165 if (count > list[0] - 2)
2166 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2167 name);
2168 if (count > 0 && list[2] == 0) count = 0;
2169 list[1] = count;
2170 break;
2171 }
2172
2173 case opt_func:
2174 {
2175 void (*fn)() = ol->value;
2176 fn(name, s);
2177 break;
2178 }
2179 }
2180
2181 return TRUE;
2182 }
2183
2184
2185
2186 /*************************************************
2187 * Print a time value *
2188 *************************************************/
2189
2190 /*
2191 Argument: a time value in seconds
2192 Returns: pointer to a fixed buffer containing the time as a string,
2193 in readconf_readtime() format
2194 */
2195
2196 uschar *
2197 readconf_printtime(int t)
2198 {
2199 int s, m, h, d, w;
2200 uschar *p = time_buffer;
2201
2202 if (t < 0)
2203 {
2204 *p++ = '-';
2205 t = -t;
2206 }
2207
2208 s = t % 60;
2209 t /= 60;
2210 m = t % 60;
2211 t /= 60;
2212 h = t % 24;
2213 t /= 24;
2214 d = t % 7;
2215 w = t/7;
2216
2217 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2218 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2219 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2220 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2221 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2222
2223 return time_buffer;
2224 }
2225
2226
2227
2228 /*************************************************
2229 * Print an individual option value *
2230 *************************************************/
2231
2232 /* This is used by the -bP option, so prints to the standard output.
2233 The entire options list is passed in as an argument, because some options come
2234 in pairs - typically uid/gid settings, which can either be explicit numerical
2235 values, or strings to be expanded later. If the numerical value is unset,
2236 search for "*expand_<name>" to see if there is a string equivalent.
2237
2238 Arguments:
2239 ol option entry, or NULL for an unknown option
2240 name option name
2241 options_block NULL for main configuration options; otherwise points to
2242 a driver block; if the option doesn't have opt_public
2243 set, then options_block->options_block is where the item
2244 resides.
2245 oltop points to the option list in which ol exists
2246 last one more than the offset of the last entry in optop
2247 no_labels do not show "foo = " at the start.
2248
2249 Returns: nothing
2250 */
2251
2252 static void
2253 print_ol(optionlist *ol, uschar *name, void *options_block,
2254 optionlist *oltop, int last, BOOL no_labels)
2255 {
2256 struct passwd *pw;
2257 struct group *gr;
2258 optionlist *ol2;
2259 void *value;
2260 uid_t *uidlist;
2261 gid_t *gidlist;
2262 uschar *s;
2263 uschar name2[64];
2264
2265 if (ol == NULL)
2266 {
2267 printf("%s is not a known option\n", name);
2268 return;
2269 }
2270
2271 /* Non-admin callers cannot see options that have been flagged secure by the
2272 "hide" prefix. */
2273
2274 if (!admin_user && (ol->type & opt_secure) != 0)
2275 {
2276 if (no_labels)
2277 printf("%s\n", hidden);
2278 else
2279 printf("%s = %s\n", name, hidden);
2280 return;
2281 }
2282
2283 /* Else show the value of the option */
2284
2285 value = ol->value;
2286 if (options_block != NULL)
2287 {
2288 if ((ol->type & opt_public) == 0)
2289 options_block = (void *)(((driver_instance *)options_block)->options_block);
2290 value = (void *)((uschar *)options_block + (long int)value);
2291 }
2292
2293 switch(ol->type & opt_mask)
2294 {
2295 case opt_stringptr:
2296 case opt_rewrite: /* Show the text value */
2297 s = *((uschar **)value);
2298 if (!no_labels) printf("%s = ", name);
2299 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2300 break;
2301
2302 case opt_int:
2303 if (!no_labels) printf("%s = ", name);
2304 printf("%d\n", *((int *)value));
2305 break;
2306
2307 case opt_mkint:
2308 {
2309 int x = *((int *)value);
2310 if (x != 0 && (x & 1023) == 0)
2311 {
2312 int c = 'K';
2313 x >>= 10;
2314 if ((x & 1023) == 0)
2315 {
2316 c = 'M';
2317 x >>= 10;
2318 }
2319 if (!no_labels) printf("%s = ", name);
2320 printf("%d%c\n", x, c);
2321 }
2322 else
2323 {
2324 if (!no_labels) printf("%s = ", name);
2325 printf("%d\n", x);
2326 }
2327 }
2328 break;
2329
2330 case opt_Kint:
2331 {
2332 int x = *((int *)value);
2333 if (!no_labels) printf("%s = ", name);
2334 if (x == 0) printf("0\n");
2335 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2336 else printf("%dK\n", x);
2337 }
2338 break;
2339
2340 case opt_octint:
2341 if (!no_labels) printf("%s = ", name);
2342 printf("%#o\n", *((int *)value));
2343 break;
2344
2345 /* Can be negative only when "unset", in which case integer */
2346
2347 case opt_fixed:
2348 {
2349 int x = *((int *)value);
2350 int f = x % 1000;
2351 int d = 100;
2352 if (x < 0) printf("%s =\n", name); else
2353 {
2354 if (!no_labels) printf("%s = ", name);
2355 printf("%d.", x/1000);
2356 do
2357 {
2358 printf("%d", f/d);
2359 f %= d;
2360 d /= 10;
2361 }
2362 while (f != 0);
2363 printf("\n");
2364 }
2365 }
2366 break;
2367
2368 /* If the numerical value is unset, try for the string value */
2369
2370 case opt_expand_uid:
2371 if (! *get_set_flag(name, oltop, last, options_block))
2372 {
2373 sprintf(CS name2, "*expand_%.50s", name);
2374 ol2 = find_option(name2, oltop, last);
2375 if (ol2 != NULL)
2376 {
2377 void *value2 = ol2->value;
2378 if (options_block != NULL)
2379 value2 = (void *)((uschar *)options_block + (long int)value2);
2380 s = *((uschar **)value2);
2381 if (!no_labels) printf("%s = ", name);
2382 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2383 break;
2384 }
2385 }
2386
2387 /* Else fall through */
2388
2389 case opt_uid:
2390 if (!no_labels) printf("%s = ", name);
2391 if (! *get_set_flag(name, oltop, last, options_block))
2392 printf("\n");
2393 else
2394 {
2395 pw = getpwuid(*((uid_t *)value));
2396 if (pw == NULL)
2397 printf("%ld\n", (long int)(*((uid_t *)value)));
2398 else printf("%s\n", pw->pw_name);
2399 }
2400 break;
2401
2402 /* If the numerical value is unset, try for the string value */
2403
2404 case opt_expand_gid:
2405 if (! *get_set_flag(name, oltop, last, options_block))
2406 {
2407 sprintf(CS name2, "*expand_%.50s", name);
2408 ol2 = find_option(name2, oltop, last);
2409 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2410 {
2411 void *value2 = ol2->value;
2412 if (options_block != NULL)
2413 value2 = (void *)((uschar *)options_block + (long int)value2);
2414 s = *((uschar **)value2);
2415 if (!no_labels) printf("%s = ", name);
2416 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2417 break;
2418 }
2419 }
2420
2421 /* Else fall through */
2422
2423 case opt_gid:
2424 if (!no_labels) printf("%s = ", name);
2425 if (! *get_set_flag(name, oltop, last, options_block))
2426 printf("\n");
2427 else
2428 {
2429 gr = getgrgid(*((int *)value));
2430 if (gr == NULL)
2431 printf("%ld\n", (long int)(*((int *)value)));
2432 else printf("%s\n", gr->gr_name);
2433 }
2434 break;
2435
2436 case opt_uidlist:
2437 uidlist = *((uid_t **)value);
2438 if (!no_labels) printf("%s =", name);
2439 if (uidlist != NULL)
2440 {
2441 int i;
2442 uschar sep = ' ';
2443 if (no_labels) sep = '\0';
2444 for (i = 1; i <= (int)(uidlist[0]); i++)
2445 {
2446 uschar *name = NULL;
2447 pw = getpwuid(uidlist[i]);
2448 if (pw != NULL) name = US pw->pw_name;
2449 if (sep != '\0') printf("%c", sep);
2450 if (name != NULL) printf("%s", name);
2451 else printf("%ld", (long int)(uidlist[i]));
2452 sep = ':';
2453 }
2454 }
2455 printf("\n");
2456 break;
2457
2458 case opt_gidlist:
2459 gidlist = *((gid_t **)value);
2460 if (!no_labels) printf("%s =", name);
2461 if (gidlist != NULL)
2462 {
2463 int i;
2464 uschar sep = ' ';
2465 if (no_labels) sep = '\0';
2466 for (i = 1; i <= (int)(gidlist[0]); i++)
2467 {
2468 uschar *name = NULL;
2469 gr = getgrgid(gidlist[i]);
2470 if (gr != NULL) name = US gr->gr_name;
2471 if (sep != '\0') printf("%c", sep);
2472 if (name != NULL) printf("%s", name);
2473 else printf("%ld", (long int)(gidlist[i]));
2474 sep = ':';
2475 }
2476 }
2477 printf("\n");
2478 break;
2479
2480 case opt_time:
2481 if (!no_labels) printf("%s = ", name);
2482 printf("%s\n", readconf_printtime(*((int *)value)));
2483 break;
2484
2485 case opt_timelist:
2486 {
2487 int i;
2488 int *list = (int *)value;
2489 if (!no_labels) printf("%s = ", name);
2490 for (i = 0; i < list[1]; i++)
2491 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2492 printf("\n");
2493 }
2494 break;
2495
2496 case opt_bit:
2497 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2498 "" : "no_", name);
2499 break;
2500
2501 case opt_expand_bool:
2502 sprintf(CS name2, "*expand_%.50s", name);
2503 ol2 = find_option(name2, oltop, last);
2504 if (ol2 != NULL && ol2->value != NULL)
2505 {
2506 void *value2 = ol2->value;
2507 if (options_block != NULL)
2508 value2 = (void *)((uschar *)options_block + (long int)value2);
2509 s = *((uschar **)value2);
2510 if (s != NULL)
2511 {
2512 if (!no_labels) printf("%s = ", name);
2513 printf("%s\n", string_printing(s));
2514 break;
2515 }
2516 /* s == NULL => string not set; fall through */
2517 }
2518
2519 /* Fall through */
2520
2521 case opt_bool:
2522 case opt_bool_verify:
2523 case opt_bool_set:
2524 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2525 break;
2526 }
2527 }
2528
2529
2530
2531 /*************************************************
2532 * Print value from main configuration *
2533 *************************************************/
2534
2535 /* This function, called as a result of encountering the -bP option,
2536 causes the value of any main configuration variable to be output if the
2537 second argument is NULL. There are some special values:
2538
2539 all print all main configuration options
2540 config_file print the name of the configuration file
2541 (configure_file will still work, for backward
2542 compatibility)
2543 routers print the routers' configurations
2544 transports print the transports' configuration
2545 authenticators print the authenticators' configuration
2546 macros print the macros' configuration
2547 router_list print a list of router names
2548 transport_list print a list of transport names
2549 authenticator_list print a list of authentication mechanism names
2550 macro_list print a list of macro names
2551 +name print a named list item
2552 local_scan print the local_scan options
2553 config print the configuration as it is parsed
2554 environment print the used execution environment
2555
2556 If the second argument is not NULL, it must be one of "router", "transport",
2557 "authenticator" or "macro" in which case the first argument identifies the
2558 driver whose options are to be printed.
2559
2560 Arguments:
2561 name option name if type == NULL; else driver name
2562 type NULL or driver type name, as described above
2563 no_labels avoid the "foo = " at the start of an item
2564
2565 Returns: nothing
2566 */
2567
2568 void
2569 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2570 {
2571 BOOL names_only = FALSE;
2572 optionlist *ol;
2573 optionlist *ol2 = NULL;
2574 driver_instance *d = NULL;
2575 macro_item *m;
2576 int size = 0;
2577
2578 if (type == NULL)
2579 {
2580 if (*name == '+')
2581 {
2582 int i;
2583 tree_node *t;
2584 BOOL found = FALSE;
2585 static uschar *types[] = { US"address", US"domain", US"host",
2586 US"localpart" };
2587 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2588 &hostlist_anchor, &localpartlist_anchor };
2589
2590 for (i = 0; i < 4; i++)
2591 {
2592 t = tree_search(*(anchors[i]), name+1);
2593 if (t != NULL)
2594 {
2595 found = TRUE;
2596 if (no_labels)
2597 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2598 else
2599 printf("%slist %s = %s\n", types[i], name+1,
2600 ((namedlist_block *)(t->data.ptr))->string);
2601 }
2602 }
2603
2604 if (!found)
2605 printf("no address, domain, host, or local part list called \"%s\" "
2606 "exists\n", name+1);
2607
2608 return;
2609 }
2610
2611 if ( Ustrcmp(name, "configure_file") == 0
2612 ||Ustrcmp(name, "config_file") == 0)
2613 {
2614 printf("%s\n", CS config_main_filename);
2615 return;
2616 }
2617
2618 if (Ustrcmp(name, "all") == 0)
2619 {
2620 for (ol = optionlist_config;
2621 ol < optionlist_config + optionlist_config_size; ol++)
2622 {
2623 if ((ol->type & opt_hidden) == 0)
2624 print_ol(ol, US ol->name, NULL,
2625 optionlist_config, optionlist_config_size,
2626 no_labels);
2627 }
2628 return;
2629 }
2630
2631 if (Ustrcmp(name, "local_scan") == 0)
2632 {
2633 #ifndef LOCAL_SCAN_HAS_OPTIONS
2634 printf("local_scan() options are not supported\n");
2635 #else
2636 for (ol = local_scan_options;
2637 ol < local_scan_options + local_scan_options_count; ol++)
2638 {
2639 print_ol(ol, US ol->name, NULL, local_scan_options,
2640 local_scan_options_count, no_labels);
2641 }
2642 #endif
2643 return;
2644 }
2645
2646 if (Ustrcmp(name, "config") == 0)
2647 {
2648 print_config(admin_user, no_labels);
2649 return;
2650 }
2651
2652 if (Ustrcmp(name, "routers") == 0)
2653 {
2654 type = US"router";
2655 name = NULL;
2656 }
2657 else if (Ustrcmp(name, "transports") == 0)
2658 {
2659 type = US"transport";
2660 name = NULL;
2661 }
2662
2663 else if (Ustrcmp(name, "authenticators") == 0)
2664 {
2665 type = US"authenticator";
2666 name = NULL;
2667 }
2668
2669 else if (Ustrcmp(name, "macros") == 0)
2670 {
2671 type = US"macro";
2672 name = NULL;
2673 }
2674
2675 else if (Ustrcmp(name, "router_list") == 0)
2676 {
2677 type = US"router";
2678 name = NULL;
2679 names_only = TRUE;
2680 }
2681
2682 else if (Ustrcmp(name, "transport_list") == 0)
2683 {
2684 type = US"transport";
2685 name = NULL;
2686 names_only = TRUE;
2687 }
2688
2689 else if (Ustrcmp(name, "authenticator_list") == 0)
2690 {
2691 type = US"authenticator";
2692 name = NULL;
2693 names_only = TRUE;
2694 }
2695
2696 else if (Ustrcmp(name, "macro_list") == 0)
2697 {
2698 type = US"macro";
2699 name = NULL;
2700 names_only = TRUE;
2701 }
2702
2703 else if (Ustrcmp(name, "environment") == 0)
2704 {
2705 if (environ)
2706 {
2707 uschar ** p;
2708 for (p = USS environ; *p; p++) ;
2709 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2710
2711 for (p = USS environ; *p; p++)
2712 {
2713 uschar * q;
2714 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2715 puts(CS *p);
2716 }
2717 }
2718 return;
2719 }
2720
2721 else
2722 {
2723 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2724 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2725 return;
2726 }
2727 }
2728
2729 /* Handle the options for a router or transport. Skip options that are flagged
2730 as hidden. Some of these are options with names starting with '*', used for
2731 internal alternative representations of other options (which the printing
2732 function will sort out). Others are synonyms kept for backward compatibility.
2733 */
2734
2735 if (Ustrcmp(type, "router") == 0)
2736 {
2737 d = (driver_instance *)routers;
2738 ol2 = optionlist_routers;
2739 size = optionlist_routers_size;
2740 }
2741 else if (Ustrcmp(type, "transport") == 0)
2742 {
2743 d = (driver_instance *)transports;
2744 ol2 = optionlist_transports;
2745 size = optionlist_transports_size;
2746 }
2747 else if (Ustrcmp(type, "authenticator") == 0)
2748 {
2749 d = (driver_instance *)auths;
2750 ol2 = optionlist_auths;
2751 size = optionlist_auths_size;
2752 }
2753
2754 else if (Ustrcmp(type, "macro") == 0)
2755 {
2756 /* People store passwords in macros and they were previously not available
2757 for printing. So we have an admin_users restriction. */
2758 if (!admin_user)
2759 {
2760 fprintf(stderr, "exim: permission denied\n");
2761 exit(EXIT_FAILURE);
2762 }
2763 for (m = macros; m != NULL; m = m->next)
2764 {
2765 if (name == NULL || Ustrcmp(name, m->name) == 0)
2766 {
2767 if (names_only)
2768 printf("%s\n", CS m->name);
2769 else
2770 printf("%s=%s\n", CS m->name, CS m->replacement);
2771 if (name != NULL)
2772 return;
2773 }
2774 }
2775 if (name != NULL)
2776 printf("%s %s not found\n", type, name);
2777 return;
2778 }
2779
2780 if (names_only)
2781 {
2782 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2783 return;
2784 }
2785
2786 /* Either search for a given driver, or print all of them */
2787
2788 for (; d != NULL; d = d->next)
2789 {
2790 if (name == NULL)
2791 printf("\n%s %s:\n", d->name, type);
2792 else if (Ustrcmp(d->name, name) != 0) continue;
2793
2794 for (ol = ol2; ol < ol2 + size; ol++)
2795 {
2796 if ((ol->type & opt_hidden) == 0)
2797 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2798 }
2799
2800 for (ol = d->info->options;
2801 ol < d->info->options + *(d->info->options_count); ol++)
2802 {
2803 if ((ol->type & opt_hidden) == 0)
2804 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2805 }
2806 if (name != NULL) return;
2807 }
2808 if (name != NULL) printf("%s %s not found\n", type, name);
2809 }
2810
2811
2812
2813 /*************************************************
2814 * Read a named list item *
2815 *************************************************/
2816
2817 /* This function reads a name and a list (i.e. string). The name is used to
2818 save the list in a tree, sorted by its name. Each entry also has a number,
2819 which can be used for caching tests, but if the string contains any expansion
2820 items other than $key, the number is set negative to inhibit caching. This
2821 mechanism is used for domain, host, and address lists that are referenced by
2822 the "+name" syntax.
2823
2824 Arguments:
2825 anchorp points to the tree anchor
2826 numberp points to the current number for this tree
2827 max the maximum number permitted
2828 s the text of the option line, starting immediately after the name
2829 of the list type
2830 tname the name of the list type, for messages
2831
2832 Returns: nothing
2833 */
2834
2835 static void
2836 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2837 uschar *tname)
2838 {
2839 BOOL forcecache = FALSE;
2840 uschar *ss;
2841 tree_node *t;
2842 namedlist_block *nb = store_get(sizeof(namedlist_block));
2843
2844 if (Ustrncmp(s, "_cache", 6) == 0)
2845 {
2846 forcecache = TRUE;
2847 s += 6;
2848 }
2849
2850 if (!isspace(*s))
2851 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2852
2853 if (*numberp >= max)
2854 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2855 tname, max);
2856
2857 while (isspace(*s)) s++;
2858 ss = s;
2859 while (isalnum(*s) || *s == '_') s++;
2860 t = store_get(sizeof(tree_node) + s-ss);
2861 Ustrncpy(t->name, ss, s-ss);
2862 t->name[s-ss] = 0;
2863 while (isspace(*s)) s++;
2864
2865 if (!tree_insertnode(anchorp, t))
2866 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2867 "duplicate name \"%s\" for a named %s", t->name, tname);
2868
2869 t->data.ptr = nb;
2870 nb->number = *numberp;
2871 *numberp += 1;
2872
2873 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2874 "missing '=' after \"%s\"", t->name);
2875 while (isspace(*s)) s++;
2876 nb->string = read_string(s, t->name);
2877 nb->cache_data = NULL;
2878
2879 /* Check the string for any expansions; if any are found, mark this list
2880 uncacheable unless the user has explicited forced caching. */
2881
2882 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2883 }
2884
2885
2886
2887
2888 /*************************************************
2889 * Unpick data for a rate limit *
2890 *************************************************/
2891
2892 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2893 separate values.
2894
2895 Arguments:
2896 s string, in the form t,b,f,l
2897 where t is the threshold (integer)
2898 b is the initial delay (time)
2899 f is the multiplicative factor (fixed point)
2900 k is the maximum time (time)
2901 threshold where to store threshold
2902 base where to store base in milliseconds
2903 factor where to store factor in milliseconds
2904 limit where to store limit
2905
2906 Returns: nothing (panics on error)
2907 */
2908
2909 static void
2910 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2911 int *limit)
2912 {
2913 uschar bstring[16], lstring[16];
2914
2915 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2916 factor, lstring) == 4)
2917 {
2918 *base = readconf_readtime(bstring, 0, TRUE);
2919 *limit = readconf_readtime(lstring, 0, TRUE);
2920 if (*base >= 0 && *limit >= 0) return;
2921 }
2922 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2923 }
2924
2925
2926
2927
2928 /*************************************************
2929 * Drop privs for checking TLS config *
2930 *************************************************/
2931
2932 /* We want to validate TLS options during readconf, but do not want to be
2933 root when we call into the TLS library, in case of library linkage errors
2934 which cause segfaults; before this check, those were always done as the Exim
2935 runtime user and it makes sense to continue with that.
2936
2937 Assumes: tls_require_ciphers has been set, if it will be
2938 exim_user has been set, if it will be
2939 exim_group has been set, if it will be
2940
2941 Returns: bool for "okay"; false will cause caller to immediately exit.
2942 */
2943
2944 #ifdef SUPPORT_TLS
2945 static BOOL
2946 tls_dropprivs_validate_require_cipher(BOOL nowarn)
2947 {
2948 const uschar *errmsg;
2949 pid_t pid;
2950 int rc, status;
2951 void (*oldsignal)(int);
2952
2953 /* If TLS will never be used, no point checking ciphers */
2954
2955 if ( !tls_advertise_hosts
2956 || !*tls_advertise_hosts
2957 || Ustrcmp(tls_advertise_hosts, ":") == 0
2958 )
2959 return TRUE;
2960 else if (!nowarn && !tls_certificate)
2961 log_write(0, LOG_MAIN,
2962 "Warning: No server certificate defined; will use a selfsigned one.\n"
2963 " Suggested action: either install a certificate or change tls_advertise_hosts option");
2964
2965 oldsignal = signal(SIGCHLD, SIG_DFL);
2966
2967 fflush(NULL);
2968 if ((pid = fork()) < 0)
2969 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2970
2971 if (pid == 0)
2972 {
2973 /* in some modes, will have dropped privilege already */
2974 if (!geteuid())
2975 exim_setugid(exim_uid, exim_gid, FALSE,
2976 US"calling tls_validate_require_cipher");
2977
2978 errmsg = tls_validate_require_cipher();
2979 if (errmsg)
2980 {
2981 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2982 "tls_require_ciphers invalid: %s", errmsg);
2983 }
2984 fflush(NULL);
2985 _exit(0);
2986 }
2987
2988 do {
2989 rc = waitpid(pid, &status, 0);
2990 } while (rc < 0 && errno == EINTR);
2991
2992 DEBUG(D_tls)
2993 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2994 (int)pid, status);
2995
2996 signal(SIGCHLD, oldsignal);
2997
2998 return status == 0;
2999 }
3000 #endif /* SUPPORT_TLS */
3001
3002
3003
3004
3005 /*************************************************
3006 * Read main configuration options *
3007 *************************************************/
3008
3009 /* This function is the first to be called for configuration reading. It
3010 opens the configuration file and reads general configuration settings until
3011 it reaches the end of the configuration section. The file is then left open so
3012 that the remaining configuration data can subsequently be read if needed for
3013 this run of Exim.
3014
3015 The configuration file must be owned either by root or exim, and be writeable
3016 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3017 in the config file, so the test is done on the compiled in values. A slight
3018 anomaly, to be carefully documented.
3019
3020 The name of the configuration file is taken from a list that is included in the
3021 binary of Exim. It can be altered from the command line, but if that is done,
3022 root privilege is immediately withdrawn unless the caller is root or exim.
3023 The first file on the list that exists is used.
3024
3025 For use on multiple systems that share file systems, first look for a
3026 configuration file whose name has the current node name on the end. If that is
3027 not found, try the generic name. For really contorted configurations, that run
3028 multiple Exims with different uid settings, first try adding the effective uid
3029 before the node name. These complications are going to waste resources on most
3030 systems. Therefore they are available only when requested by compile-time
3031 options. */
3032
3033 void
3034 readconf_main(BOOL nowarn)
3035 {
3036 int sep = 0;
3037 struct stat statbuf;
3038 uschar *s, *filename;
3039 const uschar *list = config_main_filelist;
3040
3041 /* Loop through the possible file names */
3042
3043 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
3044 != NULL)
3045 {
3046
3047 /* Cut out all the fancy processing unless specifically wanted */
3048
3049 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3050 uschar *suffix = filename + Ustrlen(filename);
3051
3052 /* Try for the node-specific file if a node name exists */
3053
3054 #ifdef CONFIGURE_FILE_USE_NODE
3055 struct utsname uts;
3056 if (uname(&uts) >= 0)
3057 {
3058 #ifdef CONFIGURE_FILE_USE_EUID
3059 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3060 config_file = Ufopen(filename, "rb");
3061 if (config_file == NULL)
3062 #endif /* CONFIGURE_FILE_USE_EUID */
3063 {
3064 sprintf(CS suffix, ".%.256s", uts.nodename);
3065 config_file = Ufopen(filename, "rb");
3066 }
3067 }
3068 #endif /* CONFIGURE_FILE_USE_NODE */
3069
3070 /* Otherwise, try the generic name, possibly with the euid added */
3071
3072 #ifdef CONFIGURE_FILE_USE_EUID
3073 if (config_file == NULL)
3074 {
3075 sprintf(CS suffix, ".%ld", (long int)original_euid);
3076 config_file = Ufopen(filename, "rb");
3077 }
3078 #endif /* CONFIGURE_FILE_USE_EUID */
3079
3080 /* Finally, try the unadorned name */
3081
3082 if (config_file == NULL)
3083 {
3084 *suffix = 0;
3085 config_file = Ufopen(filename, "rb");
3086 }
3087 #else /* if neither defined */
3088
3089 /* This is the common case when the fancy processing is not included. */
3090
3091 config_file = Ufopen(filename, "rb");
3092 #endif
3093
3094 /* If the file does not exist, continue to try any others. For any other
3095 error, break out (and die). */
3096
3097 if (config_file != NULL || errno != ENOENT) break;
3098 }
3099
3100 /* Now, once we found and opened our configuration file, we change the directory
3101 to a safe place. Later we change to $spool_directory. */
3102
3103 if (Uchdir("/") < 0)
3104 {
3105 perror("exim: chdir `/': ");
3106 exit(EXIT_FAILURE);
3107 }
3108
3109 /* On success, save the name for verification; config_filename is used when
3110 logging configuration errors (it changes for .included files) whereas
3111 config_main_filename is the name shown by -bP. Failure to open a configuration
3112 file is a serious disaster. */
3113
3114 if (config_file != NULL)
3115 {
3116 uschar *p;
3117 config_filename = config_main_filename = string_copy(filename);
3118
3119 p = Ustrrchr(filename, '/');
3120 config_main_directory = p ? string_copyn(filename, p - filename)
3121 : string_copy(US".");
3122 }
3123 else
3124 {
3125 if (filename == NULL)
3126 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3127 "%s", config_main_filelist);
3128 else
3129 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3130 "configuration file %s", filename));
3131 }
3132
3133 /* Check the status of the file we have opened, if we have retained root
3134 privileges and the file isn't /dev/null (which *should* be 0666). */
3135
3136 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3137 {
3138 if (fstat(fileno(config_file), &statbuf) != 0)
3139 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3140 big_buffer);
3141
3142 if ((statbuf.st_uid != root_uid /* owner not root */
3143 #ifdef CONFIGURE_OWNER
3144 && statbuf.st_uid != config_uid /* owner not the special one */
3145 #endif
3146 ) || /* or */
3147 (statbuf.st_gid != root_gid /* group not root & */
3148 #ifdef CONFIGURE_GROUP
3149 && statbuf.st_gid != config_gid /* group not the special one */
3150 #endif
3151 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3152 /* or */
3153 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3154
3155 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3156 "wrong owner, group, or mode", big_buffer);
3157 }
3158
3159 /* Process the main configuration settings. They all begin with a lower case
3160 letter. If we see something starting with an upper case letter, it is taken as
3161 a macro definition. */
3162
3163 while ((s = get_config_line()) != NULL)
3164 {
3165 if (isupper(s[0])) read_macro_assignment(s);
3166
3167 else if (Ustrncmp(s, "domainlist", 10) == 0)
3168 read_named_list(&domainlist_anchor, &domainlist_count,
3169 MAX_NAMED_LIST, s+10, US"domain list");
3170
3171 else if (Ustrncmp(s, "hostlist", 8) == 0)
3172 read_named_list(&hostlist_anchor, &hostlist_count,
3173 MAX_NAMED_LIST, s+8, US"host list");
3174
3175 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3176 read_named_list(&addresslist_anchor, &addresslist_count,
3177 MAX_NAMED_LIST, s+11, US"address list");
3178
3179 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3180 read_named_list(&localpartlist_anchor, &localpartlist_count,
3181 MAX_NAMED_LIST, s+13, US"local part list");
3182
3183 else
3184 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3185 NULL, US"main option \"%s\" unknown");
3186 }
3187
3188
3189 /* If local_sender_retain is set, local_from_check must be unset. */
3190
3191 if (local_sender_retain && local_from_check)
3192 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3193 "local_sender_retain are set; this combination is not allowed");
3194
3195 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3196 wanted. */
3197
3198 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3199
3200 /* The max retry interval must not be greater than 24 hours. */
3201
3202 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3203
3204 /* remote_max_parallel must be > 0 */
3205
3206 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3207
3208 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3209 start of a new SMTP message. */
3210
3211 freeze_tell_config = freeze_tell;
3212
3213 /* The primary host name may be required for expansion of spool_directory
3214 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3215 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3216 canonize it. Some people like upper case letters in their host names, so we
3217 don't force the case. */
3218
3219 if (primary_hostname == NULL)
3220 {
3221 const uschar *hostname;
3222 struct utsname uts;
3223 if (uname(&uts) < 0)
3224 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3225 hostname = US uts.nodename;
3226
3227 if (Ustrchr(hostname, '.') == NULL)
3228 {
3229 int af = AF_INET;
3230 struct hostent *hostdata;
3231
3232 #if HAVE_IPV6
3233 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3234 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3235 MCL_DOMAIN, TRUE, NULL) != OK))
3236 af = AF_INET6;
3237 #else
3238 af = AF_INET;
3239 #endif
3240
3241 for (;;)
3242 {
3243 #if HAVE_IPV6
3244 #if HAVE_GETIPNODEBYNAME
3245 int error_num;
3246 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3247 #else
3248 hostdata = gethostbyname2(CS hostname, af);
3249 #endif
3250 #else
3251 hostdata = gethostbyname(CS hostname);
3252 #endif
3253
3254 if (hostdata != NULL)
3255 {
3256 hostname = US hostdata->h_name;
3257 break;
3258 }
3259
3260 if (af == AF_INET) break;
3261 af = AF_INET;
3262 }
3263 }
3264
3265 primary_hostname = string_copy(hostname);
3266 }
3267
3268 /* Set up default value for smtp_active_hostname */
3269
3270 smtp_active_hostname = primary_hostname;
3271
3272 /* If spool_directory wasn't set in the build-time configuration, it must have
3273 got set above. Of course, writing to the log may not work if log_file_path is
3274 not set, but it will at least get to syslog or somewhere, with any luck. */