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[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 extern char **environ;
15
16 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 static void save_config_line(const uschar* line);
18 static void save_config_position(const uschar *file, int line);
19 static void print_config(BOOL admin, BOOL terse);
20 static void readconf_options_auths(void);
21
22
23 #define CSTATE_STACK_SIZE 10
24
25 const uschar *config_directory = NULL;
26
27
28 /* Structure for chain (stack) of .included files */
29
30 typedef struct config_file_item {
31 struct config_file_item *next;
32 const uschar *filename;
33 const uschar *directory;
34 FILE *file;
35 int lineno;
36 } config_file_item;
37
38 /* Structure for chain of configuration lines (-bP config) */
39
40 typedef struct config_line_item {
41 struct config_line_item *next;
42 uschar *line;
43 } config_line_item;
44
45 static config_line_item* config_lines;
46
47 /* Structure of table of conditional words and their state transitions */
48
49 typedef struct cond_item {
50 uschar *name;
51 int namelen;
52 int action1;
53 int action2;
54 int pushpop;
55 } cond_item;
56
57 /* Structure of table of syslog facility names and values */
58
59 typedef struct syslog_fac_item {
60 uschar *name;
61 int value;
62 } syslog_fac_item;
63
64 /* constants */
65 static const char * const hidden = "<value not displayable>";
66
67 /* Static variables */
68
69 static config_file_item *config_file_stack = NULL; /* For includes */
70
71 static uschar *syslog_facility_str = NULL;
72 static uschar next_section[24];
73 static uschar time_buffer[24];
74
75 /* State variables for conditional loading (.ifdef / .else / .endif) */
76
77 static int cstate = 0;
78 static int cstate_stack_ptr = -1;
79 static int cstate_stack[CSTATE_STACK_SIZE];
80
81 /* Table of state transitions for handling conditional inclusions. There are
82 four possible state transitions:
83
84 .ifdef true
85 .ifdef false
86 .elifdef true (or .else)
87 .elifdef false
88
89 .endif just causes the previous cstate to be popped off the stack */
90
91 static int next_cstate[3][4] =
92 {
93 /* State 0: reading from file, or reading until next .else or .endif */
94 { 0, 1, 2, 2 },
95 /* State 1: condition failed, skipping until next .else or .endif */
96 { 2, 2, 0, 1 },
97 /* State 2: skipping until .endif */
98 { 2, 2, 2, 2 },
99 };
100
101 /* Table of conditionals and the states to set. For each name, there are four
102 values: the length of the name (to save computing it each time), the state to
103 set if a macro was found in the line, the state to set if a macro was not found
104 in the line, and a stack manipulation setting which is:
105
106 -1 pull state value off the stack
107 0 don't alter the stack
108 +1 push value onto stack, before setting new state
109 */
110
111 static cond_item cond_list[] = {
112 { US"ifdef", 5, 0, 1, 1 },
113 { US"ifndef", 6, 1, 0, 1 },
114 { US"elifdef", 7, 2, 3, 0 },
115 { US"elifndef", 8, 3, 2, 0 },
116 { US"else", 4, 2, 2, 0 },
117 { US"endif", 5, 0, 0, -1 }
118 };
119
120 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
121
122 /* Table of syslog facility names and their values */
123
124 static syslog_fac_item syslog_list[] = {
125 { US"mail", LOG_MAIL },
126 { US"user", LOG_USER },
127 { US"news", LOG_NEWS },
128 { US"uucp", LOG_UUCP },
129 { US"local0", LOG_LOCAL0 },
130 { US"local1", LOG_LOCAL1 },
131 { US"local2", LOG_LOCAL2 },
132 { US"local3", LOG_LOCAL3 },
133 { US"local4", LOG_LOCAL4 },
134 { US"local5", LOG_LOCAL5 },
135 { US"local6", LOG_LOCAL6 },
136 { US"local7", LOG_LOCAL7 },
137 { US"daemon", LOG_DAEMON }
138 };
139
140 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
141
142
143
144
145 /*************************************************
146 * Main configuration options *
147 *************************************************/
148
149 /* The list of options that can be set in the main configuration file. This
150 must be in alphabetic order because it is searched by binary chop. */
151
152 static optionlist optionlist_config[] = {
153 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
154 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
155 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
156 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
157 { "accept_8bitmime", opt_bool, &accept_8bitmime },
158 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
159 #ifdef WITH_CONTENT_SCAN
160 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
161 #endif
162 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
163 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
164 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
165 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
166 #ifndef DISABLE_PRDR
167 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
168 #endif
169 #ifndef DISABLE_DKIM
170 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
171 #endif
172 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
173 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
174 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
175 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
176 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
177 #ifdef WITH_CONTENT_SCAN
178 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
179 #endif
180 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
181 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
182 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
183 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
184 #ifdef SUPPORT_TLS
185 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
186 #endif
187 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
188 { "add_environment", opt_stringptr, &add_environment },
189 { "admin_groups", opt_gidlist, &admin_groups },
190 { "allow_domain_literals", opt_bool, &allow_domain_literals },
191 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
192 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
193 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
194 { "auto_thaw", opt_time, &auto_thaw },
195 #ifdef WITH_CONTENT_SCAN
196 { "av_scanner", opt_stringptr, &av_scanner },
197 #endif
198 { "bi_command", opt_stringptr, &bi_command },
199 #ifdef EXPERIMENTAL_BRIGHTMAIL
200 { "bmi_config_file", opt_stringptr, &bmi_config_file },
201 #endif
202 { "bounce_message_file", opt_stringptr, &bounce_message_file },
203 { "bounce_message_text", opt_stringptr, &bounce_message_text },
204 { "bounce_return_body", opt_bool, &bounce_return_body },
205 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
206 { "bounce_return_message", opt_bool, &bounce_return_message },
207 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
208 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
209 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
210 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
211 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
212 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
213 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
214 { "check_log_inodes", opt_int, &check_log_inodes },
215 { "check_log_space", opt_Kint, &check_log_space },
216 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
217 { "check_spool_inodes", opt_int, &check_spool_inodes },
218 { "check_spool_space", opt_Kint, &check_spool_space },
219 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
220 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
221 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
222 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
223 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
224 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
225 #ifdef EXPERIMENTAL_DCC
226 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
227 { "dccifd_address", opt_stringptr, &dccifd_address },
228 { "dccifd_options", opt_stringptr, &dccifd_options },
229 #endif
230 { "debug_store", opt_bool, &debug_store },
231 { "delay_warning", opt_timelist, &delay_warning },
232 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
233 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
234 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
235 { "delivery_date_remove", opt_bool, &delivery_date_remove },
236 #ifdef ENABLE_DISABLE_FSYNC
237 { "disable_fsync", opt_bool, &disable_fsync },
238 #endif
239 { "disable_ipv6", opt_bool, &disable_ipv6 },
240 #ifndef DISABLE_DKIM
241 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
242 #endif
243 #ifdef EXPERIMENTAL_DMARC
244 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
245 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
246 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
247 #endif
248 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
249 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
250 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
251 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
252 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
253 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
254 { "dns_retrans", opt_time, &dns_retrans },
255 { "dns_retry", opt_int, &dns_retry },
256 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
257 { "dns_use_edns0", opt_int, &dns_use_edns0 },
258 /* This option is now a no-op, retained for compatibility */
259 { "drop_cr", opt_bool, &drop_cr },
260 /*********************************************************/
261 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
262 { "dsn_from", opt_stringptr, &dsn_from },
263 { "envelope_to_remove", opt_bool, &envelope_to_remove },
264 { "errors_copy", opt_stringptr, &errors_copy },
265 { "errors_reply_to", opt_stringptr, &errors_reply_to },
266 #ifndef DISABLE_EVENT
267 { "event_action", opt_stringptr, &event_action },
268 #endif
269 { "exim_group", opt_gid, &exim_gid },
270 { "exim_path", opt_stringptr, &exim_path },
271 { "exim_user", opt_uid, &exim_uid },
272 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
273 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
274 { "finduser_retries", opt_int, &finduser_retries },
275 { "freeze_tell", opt_stringptr, &freeze_tell },
276 { "gecos_name", opt_stringptr, &gecos_name },
277 { "gecos_pattern", opt_stringptr, &gecos_pattern },
278 #ifdef SUPPORT_TLS
279 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
280 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
281 #endif
282 { "header_line_maxsize", opt_int, &header_line_maxsize },
283 { "header_maxsize", opt_int, &header_maxsize },
284 { "headers_charset", opt_stringptr, &headers_charset },
285 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
286 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
287 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
288 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
289 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
290 { "hold_domains", opt_stringptr, &hold_domains },
291 { "host_lookup", opt_stringptr, &host_lookup },
292 { "host_lookup_order", opt_stringptr, &host_lookup_order },
293 { "host_reject_connection", opt_stringptr, &host_reject_connection },
294 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
295 #ifdef SUPPORT_PROXY
296 { "hosts_proxy", opt_stringptr, &hosts_proxy },
297 #endif
298 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
299 #ifdef LOOKUP_IBASE
300 { "ibase_servers", opt_stringptr, &ibase_servers },
301 #endif
302 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
303 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
304 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
305 { "keep_environment", opt_stringptr, &keep_environment },
306 { "keep_malformed", opt_time, &keep_malformed },
307 #ifdef LOOKUP_LDAP
308 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
309 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
310 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
311 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
312 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
313 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
314 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
315 { "ldap_start_tls", opt_bool, &eldap_start_tls },
316 { "ldap_version", opt_int, &eldap_version },
317 #endif
318 { "local_from_check", opt_bool, &local_from_check },
319 { "local_from_prefix", opt_stringptr, &local_from_prefix },
320 { "local_from_suffix", opt_stringptr, &local_from_suffix },
321 { "local_interfaces", opt_stringptr, &local_interfaces },
322 { "local_scan_timeout", opt_time, &local_scan_timeout },
323 { "local_sender_retain", opt_bool, &local_sender_retain },
324 { "localhost_number", opt_stringptr, &host_number_string },
325 { "log_file_path", opt_stringptr, &log_file_path },
326 { "log_selector", opt_stringptr, &log_selector_string },
327 { "log_timezone", opt_bool, &log_timezone },
328 { "lookup_open_max", opt_int, &lookup_open_max },
329 { "max_username_length", opt_int, &max_username_length },
330 { "message_body_newlines", opt_bool, &message_body_newlines },
331 { "message_body_visible", opt_mkint, &message_body_visible },
332 { "message_id_header_domain", opt_stringptr, &message_id_domain },
333 { "message_id_header_text", opt_stringptr, &message_id_text },
334 { "message_logs", opt_bool, &message_logs },
335 { "message_size_limit", opt_stringptr, &message_size_limit },
336 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
337 { "move_frozen_messages", opt_bool, &move_frozen_messages },
338 #endif
339 { "mua_wrapper", opt_bool, &mua_wrapper },
340 #ifdef LOOKUP_MYSQL
341 { "mysql_servers", opt_stringptr, &mysql_servers },
342 #endif
343 { "never_users", opt_uidlist, &never_users },
344 #ifdef SUPPORT_TLS
345 { "openssl_options", opt_stringptr, &openssl_options },
346 #endif
347 #ifdef LOOKUP_ORACLE
348 { "oracle_servers", opt_stringptr, &oracle_servers },
349 #endif
350 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
351 #ifdef EXIM_PERL
352 { "perl_at_start", opt_bool, &opt_perl_at_start },
353 { "perl_startup", opt_stringptr, &opt_perl_startup },
354 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
355 #endif
356 #ifdef LOOKUP_PGSQL
357 { "pgsql_servers", opt_stringptr, &pgsql_servers },
358 #endif
359 { "pid_file_path", opt_stringptr, &pid_file_path },
360 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
361 #ifndef DISABLE_PRDR
362 { "prdr_enable", opt_bool, &prdr_enable },
363 #endif
364 { "preserve_message_logs", opt_bool, &preserve_message_logs },
365 { "primary_hostname", opt_stringptr, &primary_hostname },
366 { "print_topbitchars", opt_bool, &print_topbitchars },
367 { "process_log_path", opt_stringptr, &process_log_path },
368 { "prod_requires_admin", opt_bool, &prod_requires_admin },
369 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
370 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
371 { "queue_domains", opt_stringptr, &queue_domains },
372 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
373 { "queue_only", opt_bool, &queue_only },
374 { "queue_only_file", opt_stringptr, &queue_only_file },
375 { "queue_only_load", opt_fixed, &queue_only_load },
376 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
377 { "queue_only_override", opt_bool, &queue_only_override },
378 { "queue_run_in_order", opt_bool, &queue_run_in_order },
379 { "queue_run_max", opt_stringptr, &queue_run_max },
380 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
381 { "receive_timeout", opt_time, &receive_timeout },
382 { "received_header_text", opt_stringptr, &received_header_text },
383 { "received_headers_max", opt_int, &received_headers_max },
384 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
385 { "recipients_max", opt_int, &recipients_max },
386 { "recipients_max_reject", opt_bool, &recipients_max_reject },
387 #ifdef LOOKUP_REDIS
388 { "redis_servers", opt_stringptr, &redis_servers },
389 #endif
390 { "remote_max_parallel", opt_int, &remote_max_parallel },
391 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
392 { "retry_data_expire", opt_time, &retry_data_expire },
393 { "retry_interval_max", opt_time, &retry_interval_max },
394 { "return_path_remove", opt_bool, &return_path_remove },
395 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
396 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
397 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
398 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
399 { "slow_lookup_log", opt_int, &slow_lookup_log },
400 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
401 { "smtp_accept_max", opt_int, &smtp_accept_max },
402 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
403 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
404 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
405 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
406 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
407 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
408 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
409 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
410 { "smtp_banner", opt_stringptr, &smtp_banner },
411 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
412 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
413 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
414 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
415 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
416 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
417 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
418 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
419 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
420 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
421 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
422 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
423 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
424 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
425 #ifdef SUPPORT_I18N
426 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
427 #endif
428 #ifdef WITH_CONTENT_SCAN
429 { "spamd_address", opt_stringptr, &spamd_address },
430 #endif
431 #ifdef EXPERIMENTAL_SPF
432 { "spf_guess", opt_stringptr, &spf_guess },
433 #endif
434 { "split_spool_directory", opt_bool, &split_spool_directory },
435 { "spool_directory", opt_stringptr, &spool_directory },
436 { "spool_wireformat", opt_bool, &spool_wireformat },
437 #ifdef LOOKUP_SQLITE
438 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
439 #endif
440 #ifdef EXPERIMENTAL_SRS
441 { "srs_config", opt_stringptr, &srs_config },
442 { "srs_hashlength", opt_int, &srs_hashlength },
443 { "srs_hashmin", opt_int, &srs_hashmin },
444 { "srs_maxage", opt_int, &srs_maxage },
445 { "srs_secrets", opt_stringptr, &srs_secrets },
446 { "srs_usehash", opt_bool, &srs_usehash },
447 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
448 #endif
449 { "strict_acl_vars", opt_bool, &strict_acl_vars },
450 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
451 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
452 { "syslog_duplication", opt_bool, &syslog_duplication },
453 { "syslog_facility", opt_stringptr, &syslog_facility_str },
454 { "syslog_pid", opt_bool, &syslog_pid },
455 { "syslog_processname", opt_stringptr, &syslog_processname },
456 { "syslog_timestamp", opt_bool, &syslog_timestamp },
457 { "system_filter", opt_stringptr, &system_filter },
458 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
459 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
460 { "system_filter_group", opt_gid, &system_filter_gid },
461 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
462 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
463 { "system_filter_user", opt_uid, &system_filter_uid },
464 { "tcp_nodelay", opt_bool, &tcp_nodelay },
465 #ifdef USE_TCP_WRAPPERS
466 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
467 #endif
468 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
469 { "timezone", opt_stringptr, &timezone_string },
470 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
471 #ifdef SUPPORT_TLS
472 { "tls_certificate", opt_stringptr, &tls_certificate },
473 { "tls_crl", opt_stringptr, &tls_crl },
474 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
475 { "tls_dhparam", opt_stringptr, &tls_dhparam },
476 { "tls_eccurve", opt_stringptr, &tls_eccurve },
477 # ifndef DISABLE_OCSP
478 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
479 # endif
480 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
481 { "tls_privatekey", opt_stringptr, &tls_privatekey },
482 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
483 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
484 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
485 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
486 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
487 #endif
488 { "trusted_groups", opt_gidlist, &trusted_groups },
489 { "trusted_users", opt_uidlist, &trusted_users },
490 { "unknown_login", opt_stringptr, &unknown_login },
491 { "unknown_username", opt_stringptr, &unknown_username },
492 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
493 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
494 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
495 { "warn_message_file", opt_stringptr, &warn_message_file },
496 { "write_rejectlog", opt_bool, &write_rejectlog }
497 };
498
499 static int optionlist_config_size = nelem(optionlist_config);
500
501
502
503 /*************************************************
504 * Find the name of an option *
505 *************************************************/
506
507 /* This function is to aid debugging. Various functions take arguments that are
508 pointer variables in the options table or in option tables for various drivers.
509 For debugging output, it is useful to be able to find the name of the option
510 which is currently being processed. This function finds it, if it exists, by
511 searching the table(s).
512
513 Arguments: a value that is presumed to be in the table above
514 Returns: the option name, or an empty string
515 */
516
517 uschar *
518 readconf_find_option(void *p)
519 {
520 int i;
521 router_instance *r;
522 transport_instance *t;
523
524 for (i = 0; i < nelem(optionlist_config); i++)
525 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
526
527 for (r = routers; r; r = r->next)
528 {
529 router_info *ri = r->info;
530 for (i = 0; i < *ri->options_count; i++)
531 {
532 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
533 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
534 return US ri->options[i].name;
535 }
536 }
537
538 for (t = transports; t; t = t->next)
539 {
540 transport_info *ti = t->info;
541 for (i = 0; i < *ti->options_count; i++)
542 {
543 optionlist * op = &ti->options[i];
544 if ((op->type & opt_mask) != opt_stringptr) continue;
545 if (p == ( op->type & opt_public
546 ? (char *)t
547 : (char *)t->options_block
548 )
549 + (long int)op->value)
550 return US op->name;
551 }
552 }
553
554 return US"";
555 }
556
557
558
559
560 /*************************************************
561 * Deal with an assignment to a macro *
562 *************************************************/
563
564 /* We have a new definition. The macro_item structure includes a final vector
565 called "name" which is one byte long. Thus, adding "namelen" gives us enough
566 room to store the "name" string.
567 If a builtin macro we place at head of list, else tail. This lets us lazy-create
568 builtins. */
569
570 macro_item *
571 macro_create(const uschar * name, const uschar * val,
572 BOOL command_line, BOOL builtin)
573 {
574 unsigned namelen = Ustrlen(name);
575 macro_item * m = store_get(sizeof(macro_item) + namelen);
576
577 /* fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val) */
578 if (!macros)
579 {
580 macros = m;
581 mlast = m;
582 m->next = NULL;
583 }
584 else if (builtin)
585 {
586 m->next = macros;
587 macros = m;
588 }
589 else
590 {
591 mlast->next = m;
592 mlast = m;
593 m->next = NULL;
594 }
595 m->command_line = command_line;
596 m->namelen = namelen;
597 m->replacement = string_copy(val);
598 Ustrcpy(m->name, name);
599 return m;
600 }
601
602
603 /* This function is called when a line that starts with an upper case letter is
604 encountered. The argument "line" should contain a complete logical line, and
605 start with the first letter of the macro name. The macro name and the
606 replacement text are extracted and stored. Redefinition of existing,
607 non-command line, macros is permitted using '==' instead of '='.
608
609 Arguments:
610 s points to the start of the logical line
611
612 Returns: nothing
613 */
614
615 static void
616 read_macro_assignment(uschar *s)
617 {
618 uschar name[64];
619 int namelen = 0;
620 BOOL redef = FALSE;
621 macro_item *m;
622
623 while (isalnum(*s) || *s == '_')
624 {
625 if (namelen >= sizeof(name) - 1)
626 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
627 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
628 name[namelen++] = *s++;
629 }
630 name[namelen] = 0;
631
632 while (isspace(*s)) s++;
633 if (*s++ != '=')
634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
635
636 if (*s == '=')
637 {
638 redef = TRUE;
639 s++;
640 }
641 while (isspace(*s)) s++;
642
643 /* If an existing macro of the same name was defined on the command line, we
644 just skip this definition. It's an error to attempt to redefine a macro without
645 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
646 It is also an error to define a macro whose name begins with the name of a
647 previously defined macro. This is the requirement that make using a tree
648 for macros hard; we must check all macros for the substring. Perhaps a
649 sorted list, and a bsearch, would work?
650 Note: it is documented that the other way round works. */
651
652 for (m = macros; m; m = m->next)
653 {
654 if (Ustrcmp(m->name, name) == 0)
655 {
656 if (!m->command_line && !redef)
657 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
658 "defined (use \"==\" if you want to redefine it", name);
659 break;
660 }
661
662 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
663 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
664 "a macro because previously defined macro \"%s\" is a substring",
665 name, m->name);
666
667 /* We cannot have this test, because it is documented that a substring
668 macro is permitted (there is even an example).
669 *
670 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
671 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
672 * "a macro because it is a substring of previously defined macro \"%s\"",
673 * name, m->name);
674 */
675 }
676
677 /* Check for an overriding command-line definition. */
678
679 if (m && m->command_line) return;
680
681 /* Redefinition must refer to an existing macro. */
682
683 if (redef)
684 if (m)
685 m->replacement = string_copy(s);
686 else
687 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
688 "\"%s\"", name);
689
690 /* We have a new definition. */
691 else
692 (void) macro_create(name, s, FALSE, FALSE);
693 }
694
695
696
697
698
699 /*************************************************/
700 /* Create compile-time feature macros */
701 static void
702 readconf_features(void)
703 {
704 /* Probably we could work out a static initialiser for wherever
705 macros are stored, but this will do for now. Some names are awkward
706 due to conflicts with other common macros. */
707
708 #ifdef SUPPORT_CRYPTEQ
709 macro_create(US"_HAVE_CRYPTEQ", US"y", FALSE, TRUE);
710 #endif
711 #if HAVE_ICONV
712 macro_create(US"_HAVE_ICONV", US"y", FALSE, TRUE);
713 #endif
714 #if HAVE_IPV6
715 macro_create(US"_HAVE_IPV6", US"y", FALSE, TRUE);
716 #endif
717 #ifdef HAVE_SETCLASSRESOURCES
718 macro_create(US"_HAVE_SETCLASSRESOURCES", US"y", FALSE, TRUE);
719 #endif
720 #ifdef SUPPORT_PAM
721 macro_create(US"_HAVE_PAM", US"y", FALSE, TRUE);
722 #endif
723 #ifdef EXIM_PERL
724 macro_create(US"_HAVE_PERL", US"y", FALSE, TRUE);
725 #endif
726 #ifdef EXPAND_DLFUNC
727 macro_create(US"_HAVE_DLFUNC", US"y", FALSE, TRUE);
728 #endif
729 #ifdef USE_TCP_WRAPPERS
730 macro_create(US"_HAVE_TCPWRAPPERS", US"y", FALSE, TRUE);
731 #endif
732 #ifdef SUPPORT_TLS
733 macro_create(US"_HAVE_TLS", US"y", FALSE, TRUE);
734 # ifdef USE_GNUTLS
735 macro_create(US"_HAVE_GNUTLS", US"y", FALSE, TRUE);
736 # else
737 macro_create(US"_HAVE_OPENSSL", US"y", FALSE, TRUE);
738 # endif
739 #endif
740 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
741 macro_create(US"_HAVE_TRANSLATE_IP_ADDRESS", US"y", FALSE, TRUE);
742 #endif
743 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
744 macro_create(US"_HAVE_MOVE_FROZEN_MESSAGES", US"y", FALSE, TRUE);
745 #endif
746 #ifdef WITH_CONTENT_SCAN
747 macro_create(US"_HAVE_CONTENT_SCANNING", US"y", FALSE, TRUE);
748 #endif
749 #ifndef DISABLE_DKIM
750 macro_create(US"_HAVE_DKIM", US"y", FALSE, TRUE);
751 #endif
752 #ifndef DISABLE_DNSSEC
753 macro_create(US"_HAVE_DNSSEC", US"y", FALSE, TRUE);
754 #endif
755 #ifndef DISABLE_EVENT
756 macro_create(US"_HAVE_EVENT", US"y", FALSE, TRUE);
757 #endif
758 #ifdef SUPPORT_I18N
759 macro_create(US"_HAVE_I18N", US"y", FALSE, TRUE);
760 #endif
761 #ifndef DISABLE_OCSP
762 macro_create(US"_HAVE_OCSP", US"y", FALSE, TRUE);
763 #endif
764 #ifndef DISABLE_PRDR
765 macro_create(US"_HAVE_PRDR", US"y", FALSE, TRUE);
766 #endif
767 #ifdef SUPPORT_PROXY
768 macro_create(US"_HAVE_PROXY", US"y", FALSE, TRUE);
769 #endif
770 #ifdef SUPPORT_SOCKS
771 macro_create(US"_HAVE_SOCKS", US"y", FALSE, TRUE);
772 #endif
773 #ifdef TCP_FASTOPEN
774 macro_create(US"_HAVE_TCP_FASTOPEN", US"y", FALSE, TRUE);
775 #endif
776 #ifdef EXPERIMENTAL_LMDB
777 macro_create(US"_HAVE_LMDB", US"y", FALSE, TRUE);
778 #endif
779 #ifdef EXPERIMENTAL_SPF
780 macro_create(US"_HAVE_SPF", US"y", FALSE, TRUE);
781 #endif
782 #ifdef EXPERIMENTAL_SRS
783 macro_create(US"_HAVE_SRS", US"y", FALSE, TRUE);
784 #endif
785 #ifdef EXPERIMENTAL_BRIGHTMAIL
786 macro_create(US"_HAVE_BRIGHTMAIL", US"y", FALSE, TRUE);
787 #endif
788 #ifdef EXPERIMENTAL_DANE
789 macro_create(US"_HAVE_DANE", US"y", FALSE, TRUE);
790 #endif
791 #ifdef EXPERIMENTAL_DCC
792 macro_create(US"_HAVE_DCC", US"y", FALSE, TRUE);
793 #endif
794 #ifdef EXPERIMENTAL_DMARC
795 macro_create(US"_HAVE_DMARC", US"y", FALSE, TRUE);
796 #endif
797 #ifdef EXPERIMENTAL_DSN_INFO
798 macro_create(US"_HAVE_DSN_INFO", US"y", FALSE, TRUE);
799 #endif
800
801 #ifdef LOOKUP_LSEARCH
802 macro_create(US"_HAVE_LOOKUP_LSEARCH", US"y", FALSE, TRUE);
803 #endif
804 #ifdef LOOKUP_CDB
805 macro_create(US"_HAVE_LOOKUP_CDB", US"y", FALSE, TRUE);
806 #endif
807 #ifdef LOOKUP_DBM
808 macro_create(US"_HAVE_LOOKUP_DBM", US"y", FALSE, TRUE);
809 #endif
810 #ifdef LOOKUP_DNSDB
811 macro_create(US"_HAVE_LOOKUP_DNSDB", US"y", FALSE, TRUE);
812 #endif
813 #ifdef LOOKUP_DSEARCH
814 macro_create(US"_HAVE_LOOKUP_DSEARCH", US"y", FALSE, TRUE);
815 #endif
816 #ifdef LOOKUP_IBASE
817 macro_create(US"_HAVE_LOOKUP_IBASE", US"y", FALSE, TRUE);
818 #endif
819 #ifdef LOOKUP_LDAP
820 macro_create(US"_HAVE_LOOKUP_LDAP", US"y", FALSE, TRUE);
821 #endif
822 #ifdef EXPERIMENTAL_LMDB
823 macro_create(US"_HAVE_LOOKUP_LMDB", US"y", FALSE, TRUE);
824 #endif
825 #ifdef LOOKUP_MYSQL
826 macro_create(US"_HAVE_LOOKUP_MYSQL", US"y", FALSE, TRUE);
827 #endif
828 #ifdef LOOKUP_NIS
829 macro_create(US"_HAVE_LOOKUP_NIS", US"y", FALSE, TRUE);
830 #endif
831 #ifdef LOOKUP_NISPLUS
832 macro_create(US"_HAVE_LOOKUP_NISPLUS", US"y", FALSE, TRUE);
833 #endif
834 #ifdef LOOKUP_ORACLE
835 macro_create(US"_HAVE_LOOKUP_ORACLE", US"y", FALSE, TRUE);
836 #endif
837 #ifdef LOOKUP_PASSWD
838 macro_create(US"_HAVE_LOOKUP_PASSWD", US"y", FALSE, TRUE);
839 #endif
840 #ifdef LOOKUP_PGSQL
841 macro_create(US"_HAVE_LOOKUP_PGSQL", US"y", FALSE, TRUE);
842 #endif
843 #ifdef LOOKUP_REDIS
844 macro_create(US"_HAVE_LOOKUP_REDIS", US"y", FALSE, TRUE);
845 #endif
846 #ifdef LOOKUP_SQLITE
847 macro_create(US"_HAVE_LOOKUP_SQLITE", US"y", FALSE, TRUE);
848 #endif
849 #ifdef LOOKUP_TESTDB
850 macro_create(US"_HAVE_LOOKUP_TESTDB", US"y", FALSE, TRUE);
851 #endif
852 #ifdef LOOKUP_WHOSON
853 macro_create(US"_HAVE_LOOKUP_WHOSON", US"y", FALSE, TRUE);
854 #endif
855
856 #ifdef TRANSPORT_APPENDFILE
857 # ifdef SUPPORT_MAILDIR
858 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILDIR", US"y", FALSE, TRUE);
859 # endif
860 # ifdef SUPPORT_MAILSTORE
861 macro_create(US"_HAVE_TRANSPORT_APPEND_MAILSTORE", US"y", FALSE, TRUE);
862 # endif
863 # ifdef SUPPORT_MBX
864 macro_create(US"_HAVE_TRANSPORT_APPEND_MBX", US"y", FALSE, TRUE);
865 # endif
866 #endif
867 }
868
869
870 void
871 readconf_options_from_list(optionlist * opts, unsigned nopt, const uschar * section, uschar * group)
872 {
873 int i;
874 const uschar * s;
875
876 /* The 'previously-defined-substring' rule for macros in config file
877 lines is done so for these builtin macros: we know that the table
878 we source from is in strict alpha order, hence the builtins portion
879 of the macros list is in reverse-alpha (we prepend them) - so longer
880 macros that have substrings are always discovered first during
881 expansion. */
882
883 for (i = 0; i < nopt; i++) if (*(s = US opts[i].name) && *s != '*')
884 if (group)
885 macro_create(string_sprintf("_OPT_%T_%T_%T", section, group, s), US"y", FALSE, TRUE);
886 else
887 macro_create(string_sprintf("_OPT_%T_%T", section, s), US"y", FALSE, TRUE);
888 }
889
890
891 static void
892 readconf_options(void)
893 {
894 readconf_options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
895 readconf_options_routers();
896 readconf_options_transports();
897 readconf_options_auths();
898 }
899
900 static void
901 macros_create_builtin(void)
902 {
903 readconf_features();
904 readconf_options();
905 macros_builtin_created = TRUE;
906 }
907
908
909 /*************************************************
910 * Read configuration line *
911 *************************************************/
912
913 /* A logical line of text is read from the configuration file into the big
914 buffer, taking account of macros, .includes, and continuations. The size of
915 big_buffer is increased if necessary. The count of configuration lines is
916 maintained. Physical input lines starting with # (ignoring leading white space,
917 and after macro replacement) and empty logical lines are always ignored.
918 Leading and trailing spaces are removed.
919
920 If we hit a line of the form "begin xxxx", the xxxx is placed in the
921 next_section vector, and the function returns NULL, indicating the end of a
922 configuration section. On end-of-file, NULL is returned with next_section
923 empty.
924
925 Arguments: none
926
927 Returns: a pointer to the first non-blank in the line,
928 or NULL if eof or end of section is reached
929 */
930
931 static uschar *
932 get_config_line(void)
933 {
934 int startoffset = 0; /* To first non-blank char in logical line */
935 int len = 0; /* Of logical line so far */
936 int newlen;
937 uschar *s, *ss;
938 macro_item *m;
939 BOOL macro_found;
940
941 /* Loop for handling continuation lines, skipping comments, and dealing with
942 .include files. */
943
944 for (;;)
945 {
946 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
947 {
948 if (config_file_stack != NULL) /* EOF inside .include */
949 {
950 (void)fclose(config_file);
951 config_file = config_file_stack->file;
952 config_filename = config_file_stack->filename;
953 config_directory = config_file_stack->directory;
954 config_lineno = config_file_stack->lineno;
955 config_file_stack = config_file_stack->next;
956 if (config_lines)
957 save_config_position(config_filename, config_lineno);
958 continue;
959 }
960
961 /* EOF at top level */
962
963 if (cstate_stack_ptr >= 0)
964 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
965 "Unexpected end of configuration file: .endif missing");
966
967 if (len != 0) break; /* EOF after continuation */
968 next_section[0] = 0; /* EOF at start of logical line */
969 return NULL;
970 }
971
972 config_lineno++;
973 newlen = len + Ustrlen(big_buffer + len);
974
975 if (config_lines && config_lineno == 1)
976 save_config_position(config_filename, config_lineno);
977
978 /* Handle pathologically long physical lines - yes, it did happen - by
979 extending big_buffer at this point. The code also copes with very long
980 logical lines. */
981
982 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
983 {
984 uschar *newbuffer;
985 big_buffer_size += BIG_BUFFER_SIZE;
986 newbuffer = store_malloc(big_buffer_size);
987
988 /* This use of strcpy is OK because we know that the string in the old
989 buffer is shorter than the new buffer. */
990
991 Ustrcpy(newbuffer, big_buffer);
992 store_free(big_buffer);
993 big_buffer = newbuffer;
994 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
995 break;
996 newlen += Ustrlen(big_buffer + newlen);
997 }
998
999 /* Find the true start of the physical line - leading spaces are always
1000 ignored. */
1001
1002 ss = big_buffer + len;
1003 while (isspace(*ss)) ss++;
1004
1005 /* Process the physical line for macros. If this is the start of the logical
1006 line, skip over initial text at the start of the line if it starts with an
1007 upper case character followed by a sequence of name characters and an equals
1008 sign, because that is the definition of a new macro, and we don't do
1009 replacement therein. */
1010
1011 s = ss;
1012 if (len == 0 && isupper(*s))
1013 {
1014 while (isalnum(*s) || *s == '_') s++;
1015 while (isspace(*s)) s++;
1016 if (*s != '=') s = ss; /* Not a macro definition */
1017 }
1018
1019 /* If the builtin macros are not yet defined, and the line contains an
1020 underscrore followed by an one of the three possible chars used by
1021 builtins, create them. */
1022
1023 if (!macros_builtin_created)
1024 {
1025 const uschar * t, * p;
1026 uschar c;
1027 for (t = s; (p = CUstrchr(t, '_')); t = p+1)
1028 if (c = p[1], c == 'O' || c == 'D' || c == 'H')
1029 {
1030 /* fprintf(stderr, "%s: builtins create triggered by '%s'\n", __FUNCTION__, s); */
1031 builtin_macros_create_trigger = string_copy(s);
1032 macros_create_builtin();
1033 break;
1034 }
1035 }
1036
1037 /* For each defined macro, scan the line (from after XXX= if present),
1038 replacing all occurrences of the macro. */
1039
1040 macro_found = FALSE;
1041 for (m = macros; m; m = m->next)
1042 {
1043 uschar *p, *pp;
1044 uschar *t = s;
1045
1046 while ((p = Ustrstr(t, m->name)) != NULL)
1047 {
1048 int moveby;
1049 int replen = Ustrlen(m->replacement);
1050
1051 /* fprintf(stderr, "%s: matched '%s' in '%s'\n", __FUNCTION__, m->name, t) */
1052 /* Expand the buffer if necessary */
1053
1054 while (newlen - m->namelen + replen + 1 > big_buffer_size)
1055 {
1056 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
1057 uschar *newbuffer = store_malloc(newsize);
1058 memcpy(newbuffer, big_buffer, newlen + 1);
1059 p = newbuffer + (p - big_buffer);
1060 s = newbuffer + (s - big_buffer);
1061 ss = newbuffer + (ss - big_buffer);
1062 t = newbuffer + (t - big_buffer);
1063 big_buffer_size = newsize;
1064 store_free(big_buffer);
1065 big_buffer = newbuffer;
1066 }
1067
1068 /* Shuffle the remaining characters up or down in the buffer before
1069 copying in the replacement text. Don't rescan the replacement for this
1070 same macro. */
1071
1072 pp = p + m->namelen;
1073 if ((moveby = replen - m->namelen) != 0)
1074 {
1075 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
1076 newlen += moveby;
1077 }
1078 Ustrncpy(p, m->replacement, replen);
1079 t = p + replen;
1080 macro_found = TRUE;
1081 }
1082 }
1083
1084 /* An empty macro replacement at the start of a line could mean that ss no
1085 longer points to the first non-blank character. */
1086
1087 while (isspace(*ss)) ss++;
1088
1089 /* Check for comment lines - these are physical lines. */
1090
1091 if (*ss == '#') continue;
1092
1093 /* Handle conditionals, which are also applied to physical lines. Conditions
1094 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1095 expansion occured on the rest of the line. A preliminary test for the leading
1096 '.' saves effort on most lines. */
1097
1098 if (*ss == '.')
1099 {
1100 int i;
1101
1102 /* Search the list of conditional directives */
1103
1104 for (i = 0; i < cond_list_size; i++)
1105 {
1106 int n;
1107 cond_item *c = cond_list+i;
1108 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1109
1110 /* The following character must be white space or end of string */
1111
1112 n = ss[1 + c->namelen];
1113 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1114
1115 /* .ifdef and .ifndef push the current state onto the stack, then set
1116 a new one from the table. Stack overflow is an error */
1117
1118 if (c->pushpop > 0)
1119 {
1120 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1122 ".%s nested too deeply", c->name);
1123 cstate_stack[++cstate_stack_ptr] = cstate;
1124 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1125 }
1126
1127 /* For any of the others, stack underflow is an error. The next state
1128 comes either from the stack (.endif) or from the table. */
1129
1130 else
1131 {
1132 if (cstate_stack_ptr < 0)
1133 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1134 ".%s without matching .ifdef", c->name);
1135 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1136 next_cstate[cstate][macro_found? c->action1 : c->action2];
1137 }
1138
1139 /* Having dealt with a directive, break the loop */
1140
1141 break;
1142 }
1143
1144 /* If we have handled a conditional directive, continue with the next
1145 physical line. Otherwise, fall through. */
1146
1147 if (i < cond_list_size) continue;
1148 }
1149
1150 /* If the conditional state is not 0 (actively using these lines), ignore
1151 this input line. */
1152
1153 if (cstate != 0) continue; /* Conditional skip */
1154
1155 /* Handle .include lines - these are also physical lines. */
1156
1157 if (Ustrncmp(ss, ".include", 8) == 0 &&
1158 (isspace(ss[8]) ||
1159 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1160 {
1161 uschar *t;
1162 int include_if_exists = isspace(ss[8])? 0 : 10;
1163 config_file_item *save;
1164 struct stat statbuf;
1165
1166 ss += 9 + include_if_exists;
1167 while (isspace(*ss)) ss++;
1168 t = ss + Ustrlen(ss);
1169 while (t > ss && isspace(t[-1])) t--;
1170 if (*ss == '\"' && t[-1] == '\"')
1171 {
1172 ss++;
1173 t--;
1174 }
1175 *t = 0;
1176
1177 /* We allow relative file names. For security reasons currently
1178 relative names not allowed with .include_if_exists. For .include_if_exists
1179 we need to check the permissions/ownership of the containing folder */
1180 if (*ss != '/')
1181 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1182 "absolute path \"%s\"", ss);
1183 else
1184 {
1185 int offset = 0;
1186 int size = 0;
1187 ss = string_append(NULL, &size, &offset, 3, config_directory, "/", ss);
1188 ss[offset] = '\0'; /* string_append() does not zero terminate the string! */
1189 }
1190
1191 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1192
1193 if (config_lines)
1194 save_config_position(config_filename, config_lineno);
1195 save = store_get(sizeof(config_file_item));
1196 save->next = config_file_stack;
1197 config_file_stack = save;
1198 save->file = config_file;
1199 save->filename = config_filename;
1200 save->directory = config_directory;
1201 save->lineno = config_lineno;
1202
1203 if (!(config_file = Ufopen(ss, "rb")))
1204 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1205 "configuration file %s", ss);
1206
1207 config_filename = string_copy(ss);
1208 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1209 config_lineno = 0;
1210 continue;
1211 }
1212
1213 /* If this is the start of the logical line, remember where the non-blank
1214 data starts. Otherwise shuffle down continuation lines to remove leading
1215 white space. */
1216
1217 if (len == 0)
1218 startoffset = ss - big_buffer;
1219 else
1220 {
1221 s = big_buffer + len;
1222 if (ss > s)
1223 {
1224 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1225 newlen -= ss - s;
1226 }
1227 }
1228
1229 /* Accept the new addition to the line. Remove trailing white space. */
1230
1231 len = newlen;
1232 while (len > 0 && isspace(big_buffer[len-1])) len--;
1233 big_buffer[len] = 0;
1234
1235 /* We are done if the line does not end in backslash and contains some data.
1236 Empty logical lines are ignored. For continuations, remove the backslash and
1237 go round the loop to read the continuation line. */
1238
1239 if (len > 0)
1240 {
1241 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1242 big_buffer[--len] = 0; /* Remove backslash */
1243 }
1244 } /* Loop for reading multiple physical lines */
1245
1246 /* We now have a logical line. Test for the end of a configuration section (or,
1247 more accurately, for the start of the next section). Place the name of the next
1248 section in next_section, and return NULL. If the name given is longer than
1249 next_section, truncate it. It will be unrecognized later, because all the known
1250 section names do fit. Leave space for pluralizing. */
1251
1252 s = big_buffer + startoffset; /* First non-space character */
1253
1254 if (config_lines)
1255 save_config_line(s);
1256
1257 if (strncmpic(s, US"begin ", 6) == 0)
1258 {
1259 s += 6;
1260 while (isspace(*s)) s++;
1261 if (big_buffer + len - s > sizeof(next_section) - 2)
1262 s[sizeof(next_section) - 2] = 0;
1263 Ustrcpy(next_section, s);
1264 return NULL;
1265 }
1266
1267 /* Return the first non-blank character. */
1268
1269 return s;
1270 }
1271
1272
1273
1274 /*************************************************
1275 * Read a name *
1276 *************************************************/
1277
1278 /* The yield is the pointer to the next uschar. Names longer than the
1279 output space are silently truncated. This function is also used from acl.c when
1280 parsing ACLs.
1281
1282 Arguments:
1283 name where to put the name
1284 len length of name
1285 s input pointer
1286
1287 Returns: new input pointer
1288 */
1289
1290 uschar *
1291 readconf_readname(uschar *name, int len, uschar *s)
1292 {
1293 int p = 0;
1294 while (isspace(*s)) s++;
1295 if (isalpha(*s))
1296 {
1297 while (isalnum(*s) || *s == '_')
1298 {
1299 if (p < len-1) name[p++] = *s;
1300 s++;
1301 }
1302 }
1303 name[p] = 0;
1304 while (isspace(*s)) s++;
1305 return s;
1306 }
1307
1308
1309
1310
1311 /*************************************************
1312 * Read a time value *
1313 *************************************************/
1314
1315 /* This function is also called from outside, to read argument
1316 time values. The format of a time value is:
1317
1318 [<n>w][<n>d][<n>h][<n>m][<n>s]
1319
1320 as long as at least one is present. If a format error is encountered,
1321 return a negative value. The value must be terminated by the given
1322 terminator.
1323
1324 Arguments:
1325 s input pointer
1326 terminator required terminating character
1327 return_msec if TRUE, allow fractional seconds and return milliseconds
1328
1329 Returns: the time value, or -1 on syntax error
1330 value is seconds if return_msec is FALSE
1331 value is milliseconds if return_msec is TRUE
1332 */
1333
1334 int
1335 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1336 {
1337 int yield = 0;
1338 for (;;)
1339 {
1340 int value, count;
1341 double fraction;
1342
1343 if (!isdigit(*s)) return -1;
1344 (void)sscanf(CCS s, "%d%n", &value, &count);
1345 s += count;
1346
1347 switch (*s)
1348 {
1349 case 'w': value *= 7;
1350 case 'd': value *= 24;
1351 case 'h': value *= 60;
1352 case 'm': value *= 60;
1353 case 's': s++;
1354 break;
1355
1356 case '.':
1357 if (!return_msec) return -1;
1358 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1359 s += count;
1360 if (*s++ != 's') return -1;
1361 yield += (int)(fraction * 1000.0);
1362 break;
1363
1364 default: return -1;
1365 }
1366
1367 if (return_msec) value *= 1000;
1368 yield += value;
1369 if (*s == terminator) return yield;
1370 }
1371 /* Control never reaches here. */
1372 }
1373
1374
1375
1376 /*************************************************
1377 * Read a fixed point value *
1378 *************************************************/
1379
1380 /* The value is returned *1000
1381
1382 Arguments:
1383 s input pointer
1384 terminator required terminator
1385
1386 Returns: the value, or -1 on error
1387 */
1388
1389 static int
1390 readconf_readfixed(const uschar *s, int terminator)
1391 {
1392 int yield = 0;
1393 int value, count;
1394 if (!isdigit(*s)) return -1;
1395 (void)sscanf(CS s, "%d%n", &value, &count);
1396 s += count;
1397 yield = value * 1000;
1398 if (*s == '.')
1399 {
1400 int m = 100;
1401 while (isdigit((*(++s))))
1402 {
1403 yield += (*s - '0') * m;
1404 m /= 10;
1405 }
1406 }
1407
1408 return (*s == terminator)? yield : (-1);
1409 }
1410
1411
1412
1413 /*************************************************
1414 * Find option in list *
1415 *************************************************/
1416
1417 /* The lists are always in order, so binary chop can be used.
1418
1419 Arguments:
1420 name the option name to search for
1421 ol the first entry in the option list
1422 last one more than the offset of the last entry in the option list
1423
1424 Returns: pointer to an option entry, or NULL if not found
1425 */
1426
1427 static optionlist *
1428 find_option(uschar *name, optionlist *ol, int last)
1429 {
1430 int first = 0;
1431 while (last > first)
1432 {
1433 int middle = (first + last)/2;
1434 int c = Ustrcmp(name, ol[middle].name);
1435
1436 if (c == 0) return ol + middle;
1437 else if (c > 0) first = middle + 1;
1438 else last = middle;
1439 }
1440 return NULL;
1441 }
1442
1443
1444
1445 /*************************************************
1446 * Find a set flag in option list *
1447 *************************************************/
1448
1449 /* Because some versions of Unix make no restrictions on the values of uids and
1450 gids (even negative ones), we cannot represent "unset" by a special value.
1451 There is therefore a separate boolean variable for each one indicating whether
1452 a value is set or not. This function returns a pointer to the boolean, given
1453 the original option name. It is a major disaster if the flag cannot be found.
1454
1455 Arguments:
1456 name the name of the uid or gid option
1457 oltop points to the start of the relevant option list
1458 last one more than the offset of the last item in the option list
1459 data_block NULL when reading main options => data values in the option
1460 list are absolute addresses; otherwise they are byte offsets
1461 in data_block (used for driver options)
1462
1463 Returns: a pointer to the boolean flag.
1464 */
1465
1466 static BOOL *
1467 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1468 {
1469 optionlist *ol;
1470 uschar name2[64];
1471 sprintf(CS name2, "*set_%.50s", name);
1472 ol = find_option(name2, oltop, last);
1473 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1474 "Exim internal error: missing set flag for %s", name);
1475 return (data_block == NULL)? (BOOL *)(ol->value) :
1476 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1477 }
1478
1479
1480
1481
1482 /*************************************************
1483 * Output extra characters message and die *
1484 *************************************************/
1485
1486 /* Called when an option line has junk on the end. Sometimes this is because
1487 the sysadmin thinks comments are permitted.
1488
1489 Arguments:
1490 s points to the extra characters
1491 t1..t3 strings to insert in the log message
1492
1493 Returns: doesn't return; dies
1494 */
1495
1496 static void
1497 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1498 {
1499 uschar *comment = US"";
1500 if (*s == '#') comment = US" (# is comment only at line start)";
1501 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1502 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1503 }
1504
1505
1506
1507 /*************************************************
1508 * Read rewrite information *
1509 *************************************************/
1510
1511 /* Each line of rewrite information contains:
1512
1513 . A complete address in the form user@domain, possibly with
1514 leading * for each part; or alternatively, a regex.
1515
1516 . A replacement string (which will be expanded).
1517
1518 . An optional sequence of one-letter flags, indicating which
1519 headers etc. to apply this rule to.
1520
1521 All this is decoded and placed into a control block. The OR of the flags is
1522 maintained in a common word.
1523
1524 Arguments:
1525 p points to the string that makes up the rule
1526 existflags points to the overall flag word
1527 isglobal TRUE if reading global rewrite rules
1528
1529 Returns: the control block for the parsed rule.
1530 */
1531
1532 static rewrite_rule *
1533 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1534 {
1535 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1536
1537 next->next = NULL;
1538 next->key = string_dequote(&p);
1539
1540 while (isspace(*p)) p++;
1541 if (*p == 0)
1542 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1543 "missing rewrite replacement string");
1544
1545 next->flags = 0;
1546 next->replacement = string_dequote(&p);
1547
1548 while (*p != 0) switch (*p++)
1549 {
1550 case ' ': case '\t': break;
1551
1552 case 'q': next->flags |= rewrite_quit; break;
1553 case 'w': next->flags |= rewrite_whole; break;
1554
1555 case 'h': next->flags |= rewrite_all_headers; break;
1556 case 's': next->flags |= rewrite_sender; break;
1557 case 'f': next->flags |= rewrite_from; break;
1558 case 't': next->flags |= rewrite_to; break;
1559 case 'c': next->flags |= rewrite_cc; break;
1560 case 'b': next->flags |= rewrite_bcc; break;
1561 case 'r': next->flags |= rewrite_replyto; break;
1562
1563 case 'E': next->flags |= rewrite_all_envelope; break;
1564 case 'F': next->flags |= rewrite_envfrom; break;
1565 case 'T': next->flags |= rewrite_envto; break;
1566
1567 case 'Q': next->flags |= rewrite_qualify; break;
1568 case 'R': next->flags |= rewrite_repeat; break;
1569
1570 case 'S':
1571 next->flags |= rewrite_smtp;
1572 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1573 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1574 "rewrite rule has the S flag but is not a regular expression");
1575 break;
1576
1577 default:
1578 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1579 "unknown rewrite flag character '%c' "
1580 "(could be missing quotes round replacement item)", p[-1]);
1581 break;
1582 }
1583
1584 /* If no action flags are set, set all the "normal" rewrites. */
1585
1586 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1587 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1588
1589 /* Remember which exist, for optimization, and return the rule */
1590
1591 *existflags |= next->flags;
1592 return next;
1593 }
1594
1595
1596
1597
1598 /*************************************************
1599 * Read global rewrite information *
1600 *************************************************/
1601
1602 /* Each line is a single rewrite rule; it is parsed into a control block
1603 by readconf_one_rewrite(), and its flags are ORed into the global flag
1604 word rewrite_existflags. */
1605
1606 void
1607 readconf_rewrites(void)
1608 {
1609 rewrite_rule **chain = &global_rewrite_rules;
1610 uschar *p;
1611
1612 while ((p = get_config_line()) != NULL)
1613 {
1614 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1615 *chain = next;
1616 chain = &(next->next);
1617 }
1618 }
1619
1620
1621
1622 /*************************************************
1623 * Read a string *
1624 *************************************************/
1625
1626 /* Strings are read into the normal store pool. As long we aren't too
1627 near the end of the current block, the string will just use what is necessary
1628 on the top of the stacking pool, because string_cat() uses the extension
1629 mechanism.
1630
1631 Argument:
1632 s the rest of the input line
1633 name the option name (for errors)
1634
1635 Returns: pointer to the string
1636 */
1637
1638 static uschar *
1639 read_string(const uschar *s, const uschar *name)
1640 {
1641 uschar *yield;
1642 const uschar *ss;
1643
1644 if (*s != '\"') return string_copy(s);
1645
1646 ss = s;
1647 yield = string_dequote(&s);
1648
1649 if (s == ss+1 || s[-1] != '\"')
1650 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1651 "missing quote at end of string value for %s", name);
1652
1653 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1654
1655 return yield;
1656 }
1657
1658
1659 /*************************************************
1660 * Custom-handler options *
1661 *************************************************/
1662 static void
1663 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1664 {
1665 if (*str == '$')
1666 smtp_receive_timeout_s = string_copy(str);
1667 else
1668 {
1669 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1670 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1671 if (smtp_receive_timeout < 0)
1672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1673 name);
1674 }
1675 }
1676
1677 /*************************************************
1678 * Handle option line *
1679 *************************************************/
1680
1681 /* This function is called from several places to process a line containing the
1682 setting of an option. The first argument is the line to be decoded; it has been
1683 checked not to be empty and not to start with '#'. Trailing newlines and white
1684 space have been removed. The second argument is a pointer to the list of
1685 variable names that are to be recognized, together with their types and
1686 locations, and the third argument gives the number of entries in the list.
1687
1688 The fourth argument is a pointer to a data block. If it is NULL, then the data
1689 values in the options list are absolute addresses. Otherwise, they are byte
1690 offsets in the data block.
1691
1692 String option data may continue onto several lines; this function reads further
1693 data from config_file if necessary.
1694
1695 The yield of this function is normally zero. If a string continues onto
1696 multiple lines, then the data value is permitted to be followed by a comma
1697 or a semicolon (for use in drivers) and the yield is that character.
1698
1699 Arguments:
1700 buffer contains the configuration line to be handled
1701 oltop points to the start of the relevant option list
1702 last one more than the offset of the last item in the option list
1703 data_block NULL when reading main options => data values in the option
1704 list are absolute addresses; otherwise they are byte offsets
1705 in data_block when they have opt_public set; otherwise
1706 they are byte offsets in data_block->options_block.
1707 unknown_txt format string to use in panic message for unknown option;
1708 must contain %s for option name
1709 if given as NULL, don't panic on unknown option
1710
1711 Returns: TRUE if an option was read successfully,
1712 FALSE false for an unknown option if unknown_txt == NULL,
1713 otherwise panic and die on an unknown option
1714 */
1715
1716 static BOOL
1717 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1718 void *data_block, uschar *unknown_txt)
1719 {
1720 int ptr = 0;
1721 int offset = 0;
1722 int n, count, type, value;
1723 int issecure = 0;
1724 uid_t uid;
1725 gid_t gid;
1726 BOOL boolvalue = TRUE;
1727 BOOL freesptr = TRUE;
1728 optionlist *ol, *ol2;
1729 struct passwd *pw;
1730 void *reset_point;
1731 int intbase = 0;
1732 uschar *inttype = US"";
1733 uschar *sptr;
1734 uschar *s = buffer;
1735 uschar **str_target;
1736 uschar name[64];
1737 uschar name2[64];
1738
1739 /* There may be leading spaces; thereafter, we expect an option name starting
1740 with a letter. */
1741
1742 while (isspace(*s)) s++;
1743 if (!isalpha(*s))
1744 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1745
1746 /* Read the name of the option, and skip any subsequent white space. If
1747 it turns out that what we read was "hide", set the flag indicating that
1748 this is a secure option, and loop to read the next word. */
1749
1750 for (n = 0; n < 2; n++)
1751 {
1752 while (isalnum(*s) || *s == '_')
1753 {
1754 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1755 s++;
1756 }
1757 name[ptr] = 0;
1758 while (isspace(*s)) s++;
1759 if (Ustrcmp(name, "hide") != 0) break;
1760 issecure = opt_secure;
1761 ptr = 0;
1762 }
1763
1764 /* Deal with "no_" or "not_" here for booleans */
1765
1766 if (Ustrncmp(name, "no_", 3) == 0)
1767 {
1768 boolvalue = FALSE;
1769 offset = 3;
1770 }
1771
1772 if (Ustrncmp(name, "not_", 4) == 0)
1773 {
1774 boolvalue = FALSE;
1775 offset = 4;
1776 }
1777
1778 /* Search the list for the given name. A non-existent name, or an option that
1779 is set twice, is a disaster. */
1780
1781 if (!(ol = find_option(name + offset, oltop, last)))
1782 {
1783 if (unknown_txt == NULL) return FALSE;
1784 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1785 }
1786
1787 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1788 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1789 "\"%s\" option set for the second time", name);
1790
1791 ol->type |= opt_set | issecure;
1792 type = ol->type & opt_mask;
1793
1794 /* Types with data values must be followed by '='; the "no[t]_" prefix
1795 applies only to boolean values. */
1796
1797 if (type < opt_bool || type > opt_bool_last)
1798 {
1799 if (offset != 0)
1800 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1801 "negation prefix applied to a non-boolean option");
1802 if (*s == 0)
1803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1804 "unexpected end of line (data missing) after %s", name);
1805 if (*s != '=')
1806 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1807 }
1808
1809 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1810 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1811 ultimately expands to one of those values. */
1812
1813 else if (*s != 0 && (offset != 0 || *s != '='))
1814 extra_chars_error(s, US"boolean option ", name, US"");
1815
1816 /* Skip white space after = */
1817
1818 if (*s == '=') while (isspace((*(++s))));
1819
1820 /* If there is a data block and the opt_public flag is not set, change
1821 the data block pointer to the private options block. */
1822
1823 if (data_block != NULL && (ol->type & opt_public) == 0)
1824 data_block = (void *)(((driver_instance *)data_block)->options_block);
1825
1826 /* Now get the data according to the type. */
1827
1828 switch (type)
1829 {
1830 /* If a string value is not enclosed in quotes, it consists of
1831 the rest of the current line, verbatim. Otherwise, string escapes
1832 are processed.
1833
1834 A transport is specified as a string, which is then looked up in the
1835 list of transports. A search type is specified as one of a number of
1836 known strings.
1837
1838 A set or rewrite rules for a driver is specified as a string, which is
1839 then parsed into a suitable chain of control blocks.
1840
1841 Uids and gids are specified as strings which are then looked up in the
1842 passwd file. Lists of uids and gids are similarly specified as colon-
1843 separated strings. */
1844
1845 case opt_stringptr:
1846 case opt_uid:
1847 case opt_gid:
1848 case opt_expand_uid:
1849 case opt_expand_gid:
1850 case opt_uidlist:
1851 case opt_gidlist:
1852 case opt_rewrite:
1853
1854 reset_point = sptr = read_string(s, name);
1855
1856 /* Having read a string, we now have several different ways of using it,
1857 depending on the data type, so do another switch. If keeping the actual
1858 string is not required (because it is interpreted), freesptr is set TRUE,
1859 and at the end we reset the pool. */
1860
1861 switch (type)
1862 {
1863 /* If this was a string, set the variable to point to the new string,
1864 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1865 rules, we still keep the string (for printing), and parse the rules into a
1866 control block and flags word. */
1867
1868 case opt_stringptr:
1869 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1870 : USS (ol->value);
1871 if (ol->type & opt_rep_con)
1872 {
1873 uschar * saved_condition;
1874 /* We already have a condition, we're conducting a crude hack to let
1875 multiple condition rules be chained together, despite storing them in
1876 text form. */
1877 *str_target = string_copy_malloc( (saved_condition = *str_target)
1878 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1879 saved_condition, sptr)
1880 : sptr);
1881 /* TODO(pdp): there is a memory leak here and just below
1882 when we set 3 or more conditions; I still don't
1883 understand the store mechanism enough to know
1884 what's the safe way to free content from an earlier store.
1885 AFAICT, stores stack, so freeing an early stored item also stores
1886 all data alloc'd after it. If we knew conditions were adjacent,
1887 we could survive that, but we don't. So I *think* we need to take
1888 another bit from opt_type to indicate "malloced"; this seems like
1889 quite a hack, especially for this one case. It also means that
1890 we can't ever reclaim the store from the *first* condition.
1891
1892 Because we only do this once, near process start-up, I'm prepared to
1893 let this slide for the time being, even though it rankles. */
1894 }
1895 else if (ol->type & opt_rep_str)
1896 {
1897 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1898 int sep_i = -(int)sep_o;
1899 const uschar * list = sptr;
1900 uschar * s;
1901 uschar * list_o = *str_target;
1902
1903 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1904 list_o = string_append_listele(list_o, sep_o, s);
1905 if (list_o)
1906 *str_target = string_copy_malloc(list_o);
1907 }
1908 else
1909 {
1910 *str_target = sptr;
1911 freesptr = FALSE;
1912 }
1913 break;
1914
1915 case opt_rewrite:
1916 if (data_block)
1917 *USS (US data_block + (long int)(ol->value)) = sptr;
1918 else
1919 *USS (ol->value) = sptr;
1920 freesptr = FALSE;
1921 if (type == opt_rewrite)
1922 {
1923 int sep = 0;
1924 int *flagptr;
1925 uschar *p = sptr;
1926 rewrite_rule **chain;
1927 optionlist *ol3;
1928
1929 sprintf(CS name2, "*%.50s_rules", name);
1930 ol2 = find_option(name2, oltop, last);
1931 sprintf(CS name2, "*%.50s_flags", name);
1932 ol3 = find_option(name2, oltop, last);
1933
1934 if (ol2 == NULL || ol3 == NULL)
1935 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1936 "rewrite rules not available for driver");
1937
1938 if (data_block == NULL)
1939 {
1940 chain = (rewrite_rule **)(ol2->value);
1941 flagptr = (int *)(ol3->value);
1942 }
1943 else
1944 {
1945 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1946 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1947 }
1948
1949 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1950 {
1951 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1952 *chain = next;
1953 chain = &(next->next);
1954 }
1955
1956 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1958 "non-header rewrite - not allowed at transport time -");
1959 }
1960 break;
1961
1962 /* If it was an expanded uid, see if there is any expansion to be
1963 done by checking for the presence of a $ character. If there is, save it
1964 in the corresponding *expand_user option field. Otherwise, fall through
1965 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1966 of data. */
1967
1968 case opt_expand_uid:
1969 sprintf(CS name2, "*expand_%.50s", name);
1970 ol2 = find_option(name2, oltop, last);
1971 if (ol2 != NULL)
1972 {
1973 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1974
1975 if (data_block == NULL)
1976 *((uschar **)(ol2->value)) = ss;
1977 else
1978 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1979
1980 if (ss != NULL)
1981 {
1982 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1983 freesptr = FALSE;
1984 break;
1985 }
1986 }
1987
1988 /* Look up a fixed uid, and also make use of the corresponding gid
1989 if a passwd entry is returned and the gid has not been set. */
1990
1991 case opt_uid:
1992 if (!route_finduser(sptr, &pw, &uid))
1993 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1994 if (data_block == NULL)
1995 *((uid_t *)(ol->value)) = uid;
1996 else
1997 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1998
1999 /* Set the flag indicating a fixed value is set */
2000
2001 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2002
2003 /* Handle matching gid if we have a passwd entry: done by finding the
2004 same name with terminating "user" changed to "group"; if not found,
2005 ignore. Also ignore if the value is already set. */
2006
2007 if (pw == NULL) break;
2008 Ustrcpy(name+Ustrlen(name)-4, "group");
2009 ol2 = find_option(name, oltop, last);
2010 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
2011 (ol2->type & opt_mask) == opt_expand_gid))
2012 {
2013 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
2014 if (! *set_flag)
2015 {
2016 if (data_block == NULL)
2017 *((gid_t *)(ol2->value)) = pw->pw_gid;
2018 else
2019 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
2020 *set_flag = TRUE;
2021 }
2022 }
2023 break;
2024
2025 /* If it was an expanded gid, see if there is any expansion to be
2026 done by checking for the presence of a $ character. If there is, save it
2027 in the corresponding *expand_user option field. Otherwise, fall through
2028 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
2029 of data. */
2030
2031 case opt_expand_gid:
2032 sprintf(CS name2, "*expand_%.50s", name);
2033 ol2 = find_option(name2, oltop, last);
2034 if (ol2 != NULL)
2035 {
2036 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
2037
2038 if (data_block == NULL)
2039 *((uschar **)(ol2->value)) = ss;
2040 else
2041 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
2042
2043 if (ss != NULL)
2044 {
2045 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2046 freesptr = FALSE;
2047 break;
2048 }
2049 }
2050
2051 /* Handle freestanding gid */
2052
2053 case opt_gid:
2054 if (!route_findgroup(sptr, &gid))
2055 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2056 if (data_block == NULL)
2057 *((gid_t *)(ol->value)) = gid;
2058 else
2059 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
2060 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2061 break;
2062
2063 /* If it was a uid list, look up each individual entry, and build
2064 a vector of uids, with a count in the first element. Put the vector
2065 in malloc store so we can free the string. (We are reading into
2066 permanent store already.) */
2067
2068 case opt_uidlist:
2069 {
2070 int count = 1;
2071 uid_t *list;
2072 int ptr = 0;
2073 const uschar *p;
2074 const uschar *op = expand_string (sptr);
2075
2076 if (op == NULL)
2077 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2078 name, expand_string_message);
2079
2080 p = op;
2081 if (*p != 0) count++;
2082 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2083 list = store_malloc(count*sizeof(uid_t));
2084 list[ptr++] = (uid_t)(count - 1);
2085
2086 if (data_block == NULL)
2087 *((uid_t **)(ol->value)) = list;
2088 else
2089 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2090
2091 p = op;
2092 while (count-- > 1)
2093 {
2094 int sep = 0;
2095 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2096 if (!route_finduser(big_buffer, NULL, &uid))
2097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2098 big_buffer);
2099 list[ptr++] = uid;
2100 }
2101 }
2102 break;
2103
2104 /* If it was a gid list, look up each individual entry, and build
2105 a vector of gids, with a count in the first element. Put the vector
2106 in malloc store so we can free the string. (We are reading into permanent
2107 store already.) */
2108
2109 case opt_gidlist:
2110 {
2111 int count = 1;
2112 gid_t *list;
2113 int ptr = 0;
2114 const uschar *p;
2115 const uschar *op = expand_string (sptr);
2116
2117 if (op == NULL)
2118 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2119 name, expand_string_message);
2120
2121 p = op;
2122 if (*p != 0) count++;
2123 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2124 list = store_malloc(count*sizeof(gid_t));
2125 list[ptr++] = (gid_t)(count - 1);
2126
2127 if (data_block == NULL)
2128 *((gid_t **)(ol->value)) = list;
2129 else
2130 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2131
2132 p = op;
2133 while (count-- > 1)
2134 {
2135 int sep = 0;
2136 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2137 if (!route_findgroup(big_buffer, &gid))
2138 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2139 big_buffer);
2140 list[ptr++] = gid;
2141 }
2142 }
2143 break;
2144 }
2145
2146 /* Release store if the value of the string doesn't need to be kept. */
2147
2148 if (freesptr) store_reset(reset_point);
2149 break;
2150
2151 /* Expanded boolean: if no characters follow, or if there are no dollar
2152 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2153 save the string for later expansion in the alternate place. */
2154
2155 case opt_expand_bool:
2156 if (*s != 0 && Ustrchr(s, '$') != 0)
2157 {
2158 sprintf(CS name2, "*expand_%.50s", name);
2159 ol2 = find_option(name2, oltop, last);
2160 if (ol2 != NULL)
2161 {
2162 reset_point = sptr = read_string(s, name);
2163 if (data_block == NULL)
2164 *((uschar **)(ol2->value)) = sptr;
2165 else
2166 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
2167 freesptr = FALSE;
2168 break;
2169 }
2170 }
2171 /* Fall through */
2172
2173 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2174 look for yes/not/true/false. Some booleans are stored in a single bit in
2175 a single int. There's a special fudge for verify settings; without a suffix
2176 they set both xx_sender and xx_recipient. The table points to the sender
2177 value; search subsequently for the recipient. There's another special case:
2178 opt_bool_set also notes when a boolean has been set. */
2179
2180 case opt_bool:
2181 case opt_bit:
2182 case opt_bool_verify:
2183 case opt_bool_set:
2184 if (*s != 0)
2185 {
2186 s = readconf_readname(name2, 64, s);
2187 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2188 boolvalue = TRUE;
2189 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2190 boolvalue = FALSE;
2191 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2192 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2193 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2194 US"for boolean option ", name);
2195 }
2196
2197 /* Handle single-bit type. */
2198
2199 if (type == opt_bit)
2200 {
2201 int bit = 1 << ((ol->type >> 16) & 31);
2202 int *ptr = (data_block == NULL)?
2203 (int *)(ol->value) :
2204 (int *)((uschar *)data_block + (long int)ol->value);
2205 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2206 break;
2207 }
2208
2209 /* Handle full BOOL types */
2210
2211 if (data_block == NULL)
2212 *((BOOL *)(ol->value)) = boolvalue;
2213 else
2214 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
2215
2216 /* Verify fudge */
2217
2218 if (type == opt_bool_verify)
2219 {
2220 sprintf(CS name2, "%.50s_recipient", name + offset);
2221 ol2 = find_option(name2, oltop, last);
2222 if (ol2 != NULL)
2223 {
2224 if (data_block == NULL)
2225 *((BOOL *)(ol2->value)) = boolvalue;
2226 else
2227 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
2228 }
2229 }
2230
2231 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2232
2233 else if (type == opt_bool_set)
2234 {
2235 sprintf(CS name2, "*set_%.50s", name + offset);
2236 ol2 = find_option(name2, oltop, last);
2237 if (ol2 != NULL)
2238 {
2239 if (data_block == NULL)
2240 *((BOOL *)(ol2->value)) = TRUE;
2241 else
2242 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
2243 }
2244 }
2245 break;
2246
2247 /* Octal integer */
2248
2249 case opt_octint:
2250 intbase = 8;
2251 inttype = US"octal ";
2252
2253 /* Integer: a simple(ish) case; allow octal and hex formats, and
2254 suffixes K, M and G. The different types affect output, not input. */
2255
2256 case opt_mkint:
2257 case opt_int:
2258 {
2259 uschar *endptr;
2260 long int lvalue;
2261
2262 errno = 0;
2263 lvalue = strtol(CS s, CSS &endptr, intbase);
2264
2265 if (endptr == s)
2266 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2267 inttype, name);
2268
2269 if (errno != ERANGE)
2270 if (tolower(*endptr) == 'k')
2271 {
2272 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2273 else lvalue *= 1024;
2274 endptr++;
2275 }
2276 else if (tolower(*endptr) == 'm')
2277 {
2278 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2279 errno = ERANGE;
2280 else lvalue *= 1024*1024;
2281 endptr++;
2282 }
2283 else if (tolower(*endptr) == 'g')
2284 {
2285 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2286 errno = ERANGE;
2287 else lvalue *= 1024*1024*1024;
2288 endptr++;
2289 }
2290
2291 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2292 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2293 "absolute value of integer \"%s\" is too large (overflow)", s);
2294
2295 while (isspace(*endptr)) endptr++;
2296 if (*endptr != 0)
2297 extra_chars_error(endptr, inttype, US"integer value for ", name);
2298
2299 value = (int)lvalue;
2300 }
2301
2302 if (data_block == NULL)
2303 *((int *)(ol->value)) = value;
2304 else
2305 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2306 break;
2307
2308 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2309 and G. */
2310 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2311
2312 case opt_Kint:
2313 {
2314 uschar *endptr;
2315 errno = 0;
2316 value = strtol(CS s, CSS &endptr, intbase);
2317
2318 if (endptr == s)
2319 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2320 inttype, name);
2321
2322 if (errno != ERANGE)
2323 if (tolower(*endptr) == 'g')
2324 {
2325 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2326 errno = ERANGE;
2327 else
2328 value *= 1024*1024;
2329 endptr++;
2330 }
2331 else if (tolower(*endptr) == 'm')
2332 {
2333 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2334 errno = ERANGE;
2335 else
2336 value *= 1024;
2337 endptr++;
2338 }
2339 else if (tolower(*endptr) == 'k')
2340 endptr++;
2341 else
2342 value = (value + 512)/1024;
2343
2344 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2345 "absolute value of integer \"%s\" is too large (overflow)", s);
2346
2347 while (isspace(*endptr)) endptr++;
2348 if (*endptr != 0)
2349 extra_chars_error(endptr, inttype, US"integer value for ", name);
2350 }
2351
2352 if (data_block == NULL)
2353 *((int *)(ol->value)) = value;
2354 else
2355 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2356 break;
2357
2358 /* Fixed-point number: held to 3 decimal places. */
2359
2360 case opt_fixed:
2361 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2362 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2363 "fixed-point number expected for %s", name);
2364
2365 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2366 "integer \"%s\" is too large (overflow)", s);
2367
2368 value *= 1000;
2369
2370 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2371 "integer \"%s\" is too large (overflow)", s);
2372
2373 /* We get a coverity error here for using count, as it derived
2374 from the tainted buffer pointed to by s, as parsed by sscanf().
2375 By the definition of sscanf we must be accessing between start
2376 and end of s (assuming it is nul-terminated...) so ignore the error. */
2377 /* coverity[tainted_data] */
2378 if (s[count] == '.')
2379 {
2380 int d = 100;
2381 while (isdigit(s[++count]))
2382 {
2383 value += (s[count] - '0') * d;
2384 d /= 10;
2385 }
2386 }
2387
2388 while (isspace(s[count])) count++;
2389
2390 if (s[count] != 0)
2391 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2392
2393 if (data_block == NULL)
2394 *((int *)(ol->value)) = value;
2395 else
2396 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2397 break;
2398
2399 /* There's a special routine to read time values. */
2400
2401 case opt_time:
2402 value = readconf_readtime(s, 0, FALSE);
2403 if (value < 0)
2404 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2405 name);
2406 if (data_block == NULL)
2407 *((int *)(ol->value)) = value;
2408 else
2409 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2410 break;
2411
2412 /* A time list is a list of colon-separated times, with the first
2413 element holding the size of the list and the second the number of
2414 entries used. */
2415
2416 case opt_timelist:
2417 {
2418 int count = 0;
2419 int *list = (data_block == NULL)?
2420 (int *)(ol->value) :
2421 (int *)((uschar *)data_block + (long int)(ol->value));
2422
2423 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2424 {
2425 int terminator = 0;
2426 uschar *snext = Ustrchr(s, ':');
2427 if (snext != NULL)
2428 {
2429 uschar *ss = snext;
2430 while (ss > s && isspace(ss[-1])) ss--;
2431 terminator = *ss;
2432 }
2433 value = readconf_readtime(s, terminator, FALSE);
2434 if (value < 0)
2435 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2436 name);
2437 if (count > 1 && value <= list[count])
2438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2439 "time value out of order for %s", name);
2440 list[count+1] = value;
2441 if (snext == NULL) break;
2442 s = snext + 1;
2443 while (isspace(*s)) s++;
2444 }
2445
2446 if (count > list[0] - 2)
2447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2448 name);
2449 if (count > 0 && list[2] == 0) count = 0;
2450 list[1] = count;
2451 break;
2452 }
2453
2454 case opt_func:
2455 {
2456 void (*fn)() = ol->value;
2457 fn(name, s);
2458 break;
2459 }
2460 }
2461
2462 return TRUE;
2463 }
2464
2465
2466
2467 /*************************************************
2468 * Print a time value *
2469 *************************************************/
2470
2471 /*
2472 Argument: a time value in seconds
2473 Returns: pointer to a fixed buffer containing the time as a string,
2474 in readconf_readtime() format
2475 */
2476
2477 uschar *
2478 readconf_printtime(int t)
2479 {
2480 int s, m, h, d, w;
2481 uschar *p = time_buffer;
2482
2483 if (t < 0)
2484 {
2485 *p++ = '-';
2486 t = -t;
2487 }
2488
2489 s = t % 60;
2490 t /= 60;
2491 m = t % 60;
2492 t /= 60;
2493 h = t % 24;
2494 t /= 24;
2495 d = t % 7;
2496 w = t/7;
2497
2498 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2499 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2500 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2501 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2502 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2503
2504 return time_buffer;
2505 }
2506
2507
2508
2509 /*************************************************
2510 * Print an individual option value *
2511 *************************************************/
2512
2513 /* This is used by the -bP option, so prints to the standard output.
2514 The entire options list is passed in as an argument, because some options come
2515 in pairs - typically uid/gid settings, which can either be explicit numerical
2516 values, or strings to be expanded later. If the numerical value is unset,
2517 search for "*expand_<name>" to see if there is a string equivalent.
2518
2519 Arguments:
2520 ol option entry, or NULL for an unknown option
2521 name option name
2522 options_block NULL for main configuration options; otherwise points to
2523 a driver block; if the option doesn't have opt_public
2524 set, then options_block->options_block is where the item
2525 resides.
2526 oltop points to the option list in which ol exists
2527 last one more than the offset of the last entry in optop
2528 no_labels do not show "foo = " at the start.
2529
2530 Returns: nothing
2531 */
2532
2533 static void
2534 print_ol(optionlist *ol, uschar *name, void *options_block,
2535 optionlist *oltop, int last, BOOL no_labels)
2536 {
2537 struct passwd *pw;
2538 struct group *gr;
2539 optionlist *ol2;
2540 void *value;
2541 uid_t *uidlist;
2542 gid_t *gidlist;
2543 uschar *s;
2544 uschar name2[64];
2545
2546 if (ol == NULL)
2547 {
2548 printf("%s is not a known option\n", name);
2549 return;
2550 }
2551
2552 /* Non-admin callers cannot see options that have been flagged secure by the
2553 "hide" prefix. */
2554
2555 if (!admin_user && (ol->type & opt_secure) != 0)
2556 {
2557 if (no_labels)
2558 printf("%s\n", hidden);
2559 else
2560 printf("%s = %s\n", name, hidden);
2561 return;
2562 }
2563
2564 /* Else show the value of the option */
2565
2566 value = ol->value;
2567 if (options_block != NULL)
2568 {
2569 if ((ol->type & opt_public) == 0)
2570 options_block = (void *)(((driver_instance *)options_block)->options_block);
2571 value = (void *)((uschar *)options_block + (long int)value);
2572 }
2573
2574 switch(ol->type & opt_mask)
2575 {
2576 case opt_stringptr:
2577 case opt_rewrite: /* Show the text value */
2578 s = *((uschar **)value);
2579 if (!no_labels) printf("%s = ", name);
2580 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2581 break;
2582
2583 case opt_int:
2584 if (!no_labels) printf("%s = ", name);
2585 printf("%d\n", *((int *)value));
2586 break;
2587
2588 case opt_mkint:
2589 {
2590 int x = *((int *)value);
2591 if (x != 0 && (x & 1023) == 0)
2592 {
2593 int c = 'K';
2594 x >>= 10;
2595 if ((x & 1023) == 0)
2596 {
2597 c = 'M';
2598 x >>= 10;
2599 }
2600 if (!no_labels) printf("%s = ", name);
2601 printf("%d%c\n", x, c);
2602 }
2603 else
2604 {
2605 if (!no_labels) printf("%s = ", name);
2606 printf("%d\n", x);
2607 }
2608 }
2609 break;
2610
2611 case opt_Kint:
2612 {
2613 int x = *((int *)value);
2614 if (!no_labels) printf("%s = ", name);
2615 if (x == 0) printf("0\n");
2616 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2617 else printf("%dK\n", x);
2618 }
2619 break;
2620
2621 case opt_octint:
2622 if (!no_labels) printf("%s = ", name);
2623 printf("%#o\n", *((int *)value));
2624 break;
2625
2626 /* Can be negative only when "unset", in which case integer */
2627
2628 case opt_fixed:
2629 {
2630 int x = *((int *)value);
2631 int f = x % 1000;
2632 int d = 100;
2633 if (x < 0) printf("%s =\n", name); else
2634 {
2635 if (!no_labels) printf("%s = ", name);
2636 printf("%d.", x/1000);
2637 do
2638 {
2639 printf("%d", f/d);
2640 f %= d;
2641 d /= 10;
2642 }
2643 while (f != 0);
2644 printf("\n");
2645 }
2646 }
2647 break;
2648
2649 /* If the numerical value is unset, try for the string value */
2650
2651 case opt_expand_uid:
2652 if (! *get_set_flag(name, oltop, last, options_block))
2653 {
2654 sprintf(CS name2, "*expand_%.50s", name);
2655 ol2 = find_option(name2, oltop, last);
2656 if (ol2 != NULL)
2657 {
2658 void *value2 = ol2->value;
2659 if (options_block != NULL)
2660 value2 = (void *)((uschar *)options_block + (long int)value2);
2661 s = *((uschar **)value2);
2662 if (!no_labels) printf("%s = ", name);
2663 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2664 break;
2665 }
2666 }
2667
2668 /* Else fall through */
2669
2670 case opt_uid:
2671 if (!no_labels) printf("%s = ", name);
2672 if (! *get_set_flag(name, oltop, last, options_block))
2673 printf("\n");
2674 else
2675 {
2676 pw = getpwuid(*((uid_t *)value));
2677 if (pw == NULL)
2678 printf("%ld\n", (long int)(*((uid_t *)value)));
2679 else printf("%s\n", pw->pw_name);
2680 }
2681 break;
2682
2683 /* If the numerical value is unset, try for the string value */
2684
2685 case opt_expand_gid:
2686 if (! *get_set_flag(name, oltop, last, options_block))
2687 {
2688 sprintf(CS name2, "*expand_%.50s", name);
2689 ol2 = find_option(name2, oltop, last);
2690 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2691 {
2692 void *value2 = ol2->value;
2693 if (options_block != NULL)
2694 value2 = (void *)((uschar *)options_block + (long int)value2);
2695 s = *((uschar **)value2);
2696 if (!no_labels) printf("%s = ", name);
2697 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2698 break;
2699 }
2700 }
2701
2702 /* Else fall through */
2703
2704 case opt_gid:
2705 if (!no_labels) printf("%s = ", name);
2706 if (! *get_set_flag(name, oltop, last, options_block))
2707 printf("\n");
2708 else
2709 {
2710 gr = getgrgid(*((int *)value));
2711 if (gr == NULL)
2712 printf("%ld\n", (long int)(*((int *)value)));
2713 else printf("%s\n", gr->gr_name);
2714 }
2715 break;
2716
2717 case opt_uidlist:
2718 uidlist = *((uid_t **)value);
2719 if (!no_labels) printf("%s =", name);
2720 if (uidlist != NULL)
2721 {
2722 int i;
2723 uschar sep = ' ';
2724 if (no_labels) sep = '\0';
2725 for (i = 1; i <= (int)(uidlist[0]); i++)
2726 {
2727 uschar *name = NULL;
2728 pw = getpwuid(uidlist[i]);
2729 if (pw != NULL) name = US pw->pw_name;
2730 if (sep != '\0') printf("%c", sep);
2731 if (name != NULL) printf("%s", name);
2732 else printf("%ld", (long int)(uidlist[i]));
2733 sep = ':';
2734 }
2735 }
2736 printf("\n");
2737 break;
2738
2739 case opt_gidlist:
2740 gidlist = *((gid_t **)value);
2741 if (!no_labels) printf("%s =", name);
2742 if (gidlist != NULL)
2743 {
2744 int i;
2745 uschar sep = ' ';
2746 if (no_labels) sep = '\0';
2747 for (i = 1; i <= (int)(gidlist[0]); i++)
2748 {
2749 uschar *name = NULL;
2750 gr = getgrgid(gidlist[i]);
2751 if (gr != NULL) name = US gr->gr_name;
2752 if (sep != '\0') printf("%c", sep);
2753 if (name != NULL) printf("%s", name);
2754 else printf("%ld", (long int)(gidlist[i]));
2755 sep = ':';
2756 }
2757 }
2758 printf("\n");
2759 break;
2760
2761 case opt_time:
2762 if (!no_labels) printf("%s = ", name);
2763 printf("%s\n", readconf_printtime(*((int *)value)));
2764 break;
2765
2766 case opt_timelist:
2767 {
2768 int i;
2769 int *list = (int *)value;
2770 if (!no_labels) printf("%s = ", name);
2771 for (i = 0; i < list[1]; i++)
2772 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2773 printf("\n");
2774 }
2775 break;
2776
2777 case opt_bit:
2778 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2779 "" : "no_", name);
2780 break;
2781
2782 case opt_expand_bool:
2783 sprintf(CS name2, "*expand_%.50s", name);
2784 ol2 = find_option(name2, oltop, last);
2785 if (ol2 != NULL && ol2->value != NULL)
2786 {
2787 void *value2 = ol2->value;
2788 if (options_block != NULL)
2789 value2 = (void *)((uschar *)options_block + (long int)value2);
2790 s = *((uschar **)value2);
2791 if (s != NULL)
2792 {
2793 if (!no_labels) printf("%s = ", name);
2794 printf("%s\n", string_printing(s));
2795 break;
2796 }
2797 /* s == NULL => string not set; fall through */
2798 }
2799
2800 /* Fall through */
2801
2802 case opt_bool:
2803 case opt_bool_verify:
2804 case opt_bool_set:
2805 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2806 break;
2807 }
2808 }
2809
2810
2811
2812 /*************************************************
2813 * Print value from main configuration *
2814 *************************************************/
2815
2816 /* This function, called as a result of encountering the -bP option,
2817 causes the value of any main configuration variable to be output if the
2818 second argument is NULL. There are some special values:
2819
2820 all print all main configuration options
2821 config_file print the name of the configuration file
2822 (configure_file will still work, for backward
2823 compatibility)
2824 routers print the routers' configurations
2825 transports print the transports' configuration
2826 authenticators print the authenticators' configuration
2827 macros print the macros' configuration
2828 router_list print a list of router names
2829 transport_list print a list of transport names
2830 authenticator_list print a list of authentication mechanism names
2831 macro_list print a list of macro names
2832 +name print a named list item
2833 local_scan print the local_scan options
2834 config print the configuration as it is parsed
2835 environment print the used execution environment
2836
2837 If the second argument is not NULL, it must be one of "router", "transport",
2838 "authenticator" or "macro" in which case the first argument identifies the
2839 driver whose options are to be printed.
2840
2841 Arguments:
2842 name option name if type == NULL; else driver name
2843 type NULL or driver type name, as described above
2844 no_labels avoid the "foo = " at the start of an item
2845
2846 Returns: nothing
2847 */
2848
2849 void
2850 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2851 {
2852 BOOL names_only = FALSE;
2853 optionlist *ol;
2854 optionlist *ol2 = NULL;
2855 driver_instance *d = NULL;
2856 macro_item *m;
2857 int size = 0;
2858
2859 if (type == NULL)
2860 {
2861 if (*name == '+')
2862 {
2863 int i;
2864 tree_node *t;
2865 BOOL found = FALSE;
2866 static uschar *types[] = { US"address", US"domain", US"host",
2867 US"localpart" };
2868 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2869 &hostlist_anchor, &localpartlist_anchor };
2870
2871 for (i = 0; i < 4; i++)
2872 {
2873 t = tree_search(*(anchors[i]), name+1);
2874 if (t != NULL)
2875 {
2876 found = TRUE;
2877 if (no_labels)
2878 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2879 else
2880 printf("%slist %s = %s\n", types[i], name+1,
2881 ((namedlist_block *)(t->data.ptr))->string);
2882 }
2883 }
2884
2885 if (!found)
2886 printf("no address, domain, host, or local part list called \"%s\" "
2887 "exists\n", name+1);
2888
2889 return;
2890 }
2891
2892 if ( Ustrcmp(name, "configure_file") == 0
2893 || Ustrcmp(name, "config_file") == 0)
2894 {
2895 printf("%s\n", CS config_main_filename);
2896 return;
2897 }
2898
2899 if (Ustrcmp(name, "all") == 0)
2900 {
2901 for (ol = optionlist_config;
2902 ol < optionlist_config + nelem(optionlist_config); ol++)
2903 {
2904 if ((ol->type & opt_hidden) == 0)
2905 print_ol(ol, US ol->name, NULL,
2906 optionlist_config, nelem(optionlist_config),
2907 no_labels);
2908 }
2909 return;
2910 }
2911
2912 if (Ustrcmp(name, "local_scan") == 0)
2913 {
2914 #ifndef LOCAL_SCAN_HAS_OPTIONS
2915 printf("local_scan() options are not supported\n");
2916 #else
2917 for (ol = local_scan_options;
2918 ol < local_scan_options + local_scan_options_count; ol++)
2919 {
2920 print_ol(ol, US ol->name, NULL, local_scan_options,
2921 local_scan_options_count, no_labels);
2922 }
2923 #endif
2924 return;
2925 }
2926
2927 if (Ustrcmp(name, "config") == 0)
2928 {
2929 print_config(admin_user, no_labels);
2930 return;
2931 }
2932
2933 if (Ustrcmp(name, "routers") == 0)
2934 {
2935 type = US"router";
2936 name = NULL;
2937 }
2938 else if (Ustrcmp(name, "transports") == 0)
2939 {
2940 type = US"transport";
2941 name = NULL;
2942 }
2943
2944 else if (Ustrcmp(name, "authenticators") == 0)
2945 {
2946 type = US"authenticator";
2947 name = NULL;
2948 }
2949
2950 else if (Ustrcmp(name, "macros") == 0)
2951 {
2952 type = US"macro";
2953 name = NULL;
2954 }
2955
2956 else if (Ustrcmp(name, "router_list") == 0)
2957 {
2958 type = US"router";
2959 name = NULL;
2960 names_only = TRUE;
2961 }
2962
2963 else if (Ustrcmp(name, "transport_list") == 0)
2964 {
2965 type = US"transport";
2966 name = NULL;
2967 names_only = TRUE;
2968 }
2969
2970 else if (Ustrcmp(name, "authenticator_list") == 0)
2971 {
2972 type = US"authenticator";
2973 name = NULL;
2974 names_only = TRUE;
2975 }
2976
2977 else if (Ustrcmp(name, "macro_list") == 0)
2978 {
2979 type = US"macro";
2980 name = NULL;
2981 names_only = TRUE;
2982 }
2983
2984 else if (Ustrcmp(name, "environment") == 0)
2985 {
2986 if (environ)
2987 {
2988 uschar ** p;
2989 for (p = USS environ; *p; p++) ;
2990 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2991
2992 for (p = USS environ; *p; p++)
2993 {
2994 uschar * q;
2995 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2996 puts(CS *p);
2997 }
2998 }
2999 return;
3000 }
3001
3002 else
3003 {
3004 print_ol(find_option(name, optionlist_config, nelem(optionlist_config)),
3005 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
3006 return;
3007 }
3008 }
3009
3010 /* Handle the options for a router or transport. Skip options that are flagged
3011 as hidden. Some of these are options with names starting with '*', used for
3012 internal alternative representations of other options (which the printing
3013 function will sort out). Others are synonyms kept for backward compatibility.
3014 */
3015
3016 if (Ustrcmp(type, "router") == 0)
3017 {
3018 d = (driver_instance *)routers;
3019 ol2 = optionlist_routers;
3020 size = optionlist_routers_size;
3021 }
3022 else if (Ustrcmp(type, "transport") == 0)
3023 {
3024 d = (driver_instance *)transports;
3025 ol2 = optionlist_transports;
3026 size = optionlist_transports_size;
3027 }
3028 else if (Ustrcmp(type, "authenticator") == 0)
3029 {
3030 d = (driver_instance *)auths;
3031 ol2 = optionlist_auths;
3032 size = optionlist_auths_size;
3033 }
3034
3035 else if (Ustrcmp(type, "macro") == 0)
3036 {
3037 /* People store passwords in macros and they were previously not available
3038 for printing. So we have an admin_users restriction. */
3039 if (!admin_user)
3040 {
3041 fprintf(stderr, "exim: permission denied\n");
3042 exit(EXIT_FAILURE);
3043 }
3044 if (!macros_builtin_created) macros_create_builtin();
3045 for (m = macros; m; m = m->next)
3046 if (!name || Ustrcmp(name, m->name) == 0)
3047 {
3048 if (names_only)
3049 printf("%s\n", CS m->name);
3050 else
3051 printf("%s=%s\n", CS m->name, CS m->replacement);
3052 if (name)
3053 return;
3054 }
3055 if (name)
3056 printf("%s %s not found\n", type, name);
3057 return;
3058 }
3059
3060 if (names_only)
3061 {
3062 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
3063 return;
3064 }
3065
3066 /* Either search for a given driver, or print all of them */
3067
3068 for (; d != NULL; d = d->next)
3069 {
3070 if (name == NULL)
3071 printf("\n%s %s:\n", d->name, type);
3072 else if (Ustrcmp(d->name, name) != 0) continue;
3073
3074 for (ol = ol2; ol < ol2 + size; ol++)
3075 {
3076 if ((ol->type & opt_hidden) == 0)
3077 print_ol(ol, US ol->name, d, ol2, size, no_labels);
3078 }
3079
3080 for (ol = d->info->options;
3081 ol < d->info->options + *(d->info->options_count); ol++)
3082 {
3083 if ((ol->type & opt_hidden) == 0)
3084 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
3085 }
3086 if (name != NULL) return;
3087 }
3088 if (name != NULL) printf("%s %s not found\n", type, name);
3089 }
3090
3091
3092
3093 /*************************************************
3094 * Read a named list item *
3095 *************************************************/
3096
3097 /* This function reads a name and a list (i.e. string). The name is used to
3098 save the list in a tree, sorted by its name. Each entry also has a number,
3099 which can be used for caching tests, but if the string contains any expansion
3100 items other than $key, the number is set negative to inhibit caching. This
3101 mechanism is used for domain, host, and address lists that are referenced by
3102 the "+name" syntax.
3103
3104 Arguments:
3105 anchorp points to the tree anchor
3106 numberp points to the current number for this tree
3107 max the maximum number permitted
3108 s the text of the option line, starting immediately after the name
3109 of the list type
3110 tname the name of the list type, for messages
3111
3112 Returns: nothing
3113 */
3114
3115 static void
3116 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3117 uschar *tname)
3118 {
3119 BOOL forcecache = FALSE;
3120 uschar *ss;
3121 tree_node *t;
3122 namedlist_block *nb = store_get(sizeof(namedlist_block));
3123
3124 if (Ustrncmp(s, "_cache", 6) == 0)
3125 {
3126 forcecache = TRUE;
3127 s += 6;
3128 }
3129
3130 if (!isspace(*s))
3131 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3132
3133 if (*numberp >= max)
3134 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3135 tname, max);
3136
3137 while (isspace(*s)) s++;
3138 ss = s;
3139 while (isalnum(*s) || *s == '_') s++;
3140 t = store_get(sizeof(tree_node) + s-ss);
3141 Ustrncpy(t->name, ss, s-ss);
3142 t->name[s-ss] = 0;
3143 while (isspace(*s)) s++;
3144
3145 if (!tree_insertnode(anchorp, t))
3146 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3147 "duplicate name \"%s\" for a named %s", t->name, tname);
3148
3149 t->data.ptr = nb;
3150 nb->number = *numberp;
3151 *numberp += 1;
3152
3153 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3154 "missing '=' after \"%s\"", t->name);
3155 while (isspace(*s)) s++;
3156 nb->string = read_string(s, t->name);
3157 nb->cache_data = NULL;
3158
3159 /* Check the string for any expansions; if any are found, mark this list
3160 uncacheable unless the user has explicited forced caching. */
3161
3162 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3163 }
3164
3165
3166
3167
3168 /*************************************************
3169 * Unpick data for a rate limit *
3170 *************************************************/
3171
3172 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3173 separate values.
3174
3175 Arguments:
3176 s string, in the form t,b,f,l
3177 where t is the threshold (integer)
3178 b is the initial delay (time)
3179 f is the multiplicative factor (fixed point)
3180 k is the maximum time (time)
3181 threshold where to store threshold
3182 base where to store base in milliseconds
3183 factor where to store factor in milliseconds
3184 limit where to store limit
3185
3186 Returns: nothing (panics on error)
3187 */
3188
3189 static void
3190 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3191 int *limit)
3192 {
3193 uschar bstring[16], lstring[16];
3194
3195 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3196 factor, lstring) == 4)
3197 {
3198 *base = readconf_readtime(bstring, 0, TRUE);
3199 *limit = readconf_readtime(lstring, 0, TRUE);
3200 if (*base >= 0 && *limit >= 0) return;
3201 }
3202 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3203 }
3204
3205
3206
3207
3208 /*************************************************
3209 * Drop privs for checking TLS config *
3210 *************************************************/
3211
3212 /* We want to validate TLS options during readconf, but do not want to be
3213 root when we call into the TLS library, in case of library linkage errors
3214 which cause segfaults; before this check, those were always done as the Exim
3215 runtime user and it makes sense to continue with that.
3216
3217 Assumes: tls_require_ciphers has been set, if it will be
3218 exim_user has been set, if it will be
3219 exim_group has been set, if it will be
3220
3221 Returns: bool for "okay"; false will cause caller to immediately exit.
3222 */
3223
3224 #ifdef SUPPORT_TLS
3225 static BOOL
3226 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3227 {
3228 const uschar *errmsg;
3229 pid_t pid;
3230 int rc, status;
3231 void (*oldsignal)(int);
3232
3233 /* If TLS will never be used, no point checking ciphers */
3234
3235 if ( !tls_advertise_hosts
3236 || !*tls_advertise_hosts
3237 || Ustrcmp(tls_advertise_hosts, ":") == 0
3238 )
3239 return TRUE;
3240 else if (!nowarn && !tls_certificate)
3241 log_write(0, LOG_MAIN,
3242 "Warning: No server certificate defined; will use a selfsigned one.\n"
3243 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3244
3245 oldsignal = signal(SIGCHLD, SIG_DFL);
3246
3247 fflush(NULL);
3248 if ((pid = fork()) < 0)
3249 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3250
3251 if (pid == 0)
3252 {
3253 /* in some modes, will have dropped privilege already */
3254 if (!geteuid())
3255 exim_setugid(exim_uid, exim_gid, FALSE,
3256 US"calling tls_validate_require_cipher");
3257
3258 if ((errmsg = tls_validate_require_cipher()))
3259 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3260 "tls_require_ciphers invalid: %s", errmsg);
3261 fflush(NULL);
3262 _exit(0);
3263 }
3264
3265 do {
3266 rc = waitpid(pid, &status, 0);
3267 } while (rc < 0 && errno == EINTR);
3268
3269 DEBUG(D_tls)
3270 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3271 (int)pid, status);
3272
3273 signal(SIGCHLD, oldsignal);
3274
3275 return status == 0;
3276 }
3277 #endif /* SUPPORT_TLS */
3278
3279
3280
3281
3282 /*************************************************
3283 * Read main configuration options *
3284 *************************************************/
3285
3286 /* This function is the first to be called for configuration reading. It
3287 opens the configuration file and reads general configuration settings until
3288 it reaches the end of the configuration section. The file is then left open so
3289 that the remaining configuration data can subsequently be read if needed for
3290 this run of Exim.
3291
3292 The configuration file must be owned either by root or exim, and be writeable
3293 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3294 in the config file, so the test is done on the compiled in values. A slight
3295 anomaly, to be carefully documented.
3296
3297 The name of the configuration file is taken from a list that is included in the
3298 binary of Exim. It can be altered from the command line, but if that is done,
3299 root privilege is immediately withdrawn unless the caller is root or exim.
3300 The first file on the list that exists is used.
3301
3302 For use on multiple systems that share file systems, first look for a
3303 configuration file whose name has the current node name on the end. If that is
3304 not found, try the generic name. For really contorted configurations, that run
3305 multiple Exims with different uid settings, first try adding the effective uid
3306 before the node name. These complications are going to waste resources on most
3307 systems. Therefore they are available only when requested by compile-time
3308 options. */
3309
3310 void
3311 readconf_main(BOOL nowarn)
3312 {
3313 int sep = 0;
3314 struct stat statbuf;
3315 uschar *s, *filename;
3316 const uschar *list = config_main_filelist;
3317
3318 /* Loop through the possible file names */
3319
3320 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3321 {
3322
3323 /* Cut out all the fancy processing unless specifically wanted */
3324
3325 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3326 uschar *suffix = filename + Ustrlen(filename);
3327
3328 /* Try for the node-specific file if a node name exists */
3329
3330 #ifdef CONFIGURE_FILE_USE_NODE
3331 struct utsname uts;
3332 if (uname(&uts) >= 0)
3333 {
3334 #ifdef CONFIGURE_FILE_USE_EUID
3335 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3336 config_file = Ufopen(filename, "rb");
3337 if (config_file == NULL)
3338 #endif /* CONFIGURE_FILE_USE_EUID */
3339 {
3340 sprintf(CS suffix, ".%.256s", uts.nodename);
3341 config_file = Ufopen(filename, "rb");
3342 }
3343 }
3344 #endif /* CONFIGURE_FILE_USE_NODE */
3345
3346 /* Otherwise, try the generic name, possibly with the euid added */
3347
3348 #ifdef CONFIGURE_FILE_USE_EUID
3349 if (config_file == NULL)
3350 {
3351 sprintf(CS suffix, ".%ld", (long int)original_euid);
3352 config_file = Ufopen(filename, "rb");
3353 }
3354 #endif /* CONFIGURE_FILE_USE_EUID */
3355
3356 /* Finally, try the unadorned name */
3357
3358 if (config_file == NULL)
3359 {
3360 *suffix = 0;
3361 config_file = Ufopen(filename, "rb");
3362 }
3363 #else /* if neither defined */
3364
3365 /* This is the common case when the fancy processing is not included. */
3366
3367 config_file = Ufopen(filename, "rb");
3368 #endif
3369
3370 /* If the file does not exist, continue to try any others. For any other
3371 error, break out (and die). */
3372
3373 if (config_file != NULL || errno != ENOENT) break;
3374 }
3375
3376 /* On success, save the name for verification; config_filename is used when
3377 logging configuration errors (it changes for .included files) whereas
3378 config_main_filename is the name shown by -bP. Failure to open a configuration
3379 file is a serious disaster. */
3380
3381 if (config_file)
3382 {
3383 uschar *last_slash = Ustrrchr(filename, '/');
3384 config_filename = config_main_filename = string_copy(filename);
3385
3386 /* The config_main_directory we need for the $config_dir expansion.
3387 config_main_filename we need for $config_file expansion.
3388 And config_dir is the directory of the current configuration, used for
3389 relative .includes. We do need to know it's name, as we change our working
3390 directory later. */
3391
3392 if (filename[0] == '/')
3393 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3394 else
3395 {
3396 /* relative configuration file name: working dir + / + basename(filename) */
3397
3398 uschar buf[PATH_MAX];
3399 int offset = 0;
3400 int size = 0;
3401
3402 if (os_getcwd(buf, PATH_MAX) == NULL)
3403 {
3404 perror("exim: getcwd");
3405 exit(EXIT_FAILURE);
3406 }
3407 config_main_directory = string_cat(NULL, &size, &offset, buf);
3408
3409 /* If the dir does not end with a "/", append one */
3410 if (config_main_directory[offset-1] != '/')
3411 config_main_directory = string_catn(config_main_directory, &size, &offset, US"/", 1);
3412
3413 /* If the config file contains a "/", extract the directory part */
3414 if (last_slash)
3415 config_main_directory = string_catn(config_main_directory, &size, &offset, filename, last_slash - filename);
3416
3417 config_main_directory[offset] = '\0';
3418 }
3419 config_directory = config_main_directory;
3420 }
3421 else
3422 {
3423 if (filename == NULL)
3424 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3425 "%s", config_main_filelist);
3426 else
3427 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3428 "configuration file %s", filename));
3429 }
3430
3431 /* Now, once we found and opened our configuration file, we change the directory
3432 to a safe place. Later we change to $spool_directory. */
3433
3434 if (Uchdir("/") < 0)
3435 {
3436 perror("exim: chdir `/': ");
3437 exit(EXIT_FAILURE);
3438 }
3439
3440 /* Check the status of the file we have opened, if we have retained root
3441 privileges and the file isn't /dev/null (which *should* be 0666). */
3442
3443 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3444 {
3445 if (fstat(fileno(config_file), &statbuf) != 0)
3446 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3447 big_buffer);
3448
3449 if ((statbuf.st_uid != root_uid /* owner not root */
3450 #ifdef CONFIGURE_OWNER
3451 && statbuf.st_uid != config_uid /* owner not the special one */
3452 #endif
3453 ) || /* or */
3454 (statbuf.st_gid != root_gid /* group not root & */
3455 #ifdef CONFIGURE_GROUP
3456 && statbuf.st_gid != config_gid /* group not the special one */
3457 #endif
3458 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3459 /* or */
3460 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3461
3462 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3463 "wrong owner, group, or mode", big_buffer);
3464 }
3465
3466 /* Process the main configuration settings. They all begin with a lower case
3467 letter. If we see something starting with an upper case letter, it is taken as
3468 a macro definition. */
3469
3470 while ((s = get_config_line()) != NULL)
3471 {
3472
3473 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3474 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3475 "found unexpected BOM (Byte Order Mark)");
3476
3477 if (isupper(s[0])) read_macro_assignment(s);
3478
3479 else if (Ustrncmp(s, "domainlist", 10) == 0)
3480 read_named_list(&domainlist_anchor, &domainlist_count,
3481 MAX_NAMED_LIST, s+10, US"domain list");
3482
3483 else if (Ustrncmp(s, "hostlist", 8) == 0)
3484 read_named_list(&hostlist_anchor, &hostlist_count,
3485 MAX_NAMED_LIST, s+8, US"host list");
3486
3487 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3488 read_named_list(&addresslist_anchor, &addresslist_count,
3489 MAX_NAMED_LIST, s+11, US"address list");
3490
3491 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3492 read_named_list(&localpartlist_anchor, &localpartlist_count,
3493 MAX_NAMED_LIST, s+13, US"local part list");
3494
3495 else
3496 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3497 NULL, US"main option \"%s\" unknown");
3498 }
3499
3500
3501 /* If local_sender_retain is set, local_from_check must be unset. */
3502
3503 if (local_sender_retain && local_from_check)
3504 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3505 "local_sender_retain are set; this combination is not allowed");
3506
3507 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3508 wanted. */
3509
3510 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3511
3512 /* The max retry interval must not be greater than 24 hours. */
3513
3514 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3515
3516 /* remote_max_parallel must be > 0 */
3517
3518 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3519
3520 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3521 start of a new SMTP message. */
3522
3523 freeze_tell_config = freeze_tell;
3524
3525 /* The primary host name may be required for expansion of spool_directory
3526 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3527 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3528 canonize it. Some people like upper case letters in their host names, so we
3529 don't force the case. */
3530
3531 if (primary_hostname == NULL)
3532 {
3533 const uschar *hostname;
3534 struct utsname uts;
3535 if (uname(&uts) < 0)
3536 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3537 hostname = US uts.nodename;
3538
3539 if (Ustrchr(hostname, '.') == NULL)
3540 {
3541 int af = AF_INET;
3542 struct hostent *hostdata;
3543
3544 #if HAVE_IPV6
3545 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3546 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3547 MCL_DOMAIN, TRUE, NULL) != OK))
3548 af = AF_INET6;
3549 #else
3550 af = AF_INET;
3551 #endif
3552
3553 for (;;)
3554 {
3555 #if HAVE_IPV6
3556 #if HAVE_GETIPNODEBYNAME
3557 int error_num;
3558 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3559 #else
3560 hostdata = gethostbyname2(CS hostname, af);
3561 #endif
3562 #else
3563 hostdata = gethostbyname(CS hostname);
3564 #endif
3565
3566 if (hostdata != NULL)
3567 {
3568 hostname = US hostdata->h_name;
3569 break;
3570 }
3571
3572 if (af == AF_INET) break;
3573 af = AF_INET;
3574 }
3575 }
3576
3577 primary_hostname = string_copy(hostname);
3578 }
3579
3580 /* Set up default value for smtp_active_hostname */
3581
3582 smtp_active_hostname = primary_hostname;
3583
3584 /* If spool_directory wasn't set in the build-time configuration, it must have
3585 got set above. Of course, writing to the log may not work if log_file_path is
3586 not set, but it will at least get to syslog or somewhere, with any luck. */
3587
3588 if (*spool_directory == 0)
3589 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3590 "proceed");
3591
3592 /* Expand the spool directory name; it may, for example, contain the primary
3593 host name. Same comment about failure. */
3594
3595 s = expand_string(spool_directory);
3596 if (s == NULL)
3597 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3598 "\"%s\": %s", spool_directory, expand_string_message);
3599 spool_directory = s;
3600
3601 /* Expand log_file_path, which must contain "%s" in any component that isn't
3602 the null string or "syslog". It is also allowed to contain one instance of %D
3603 or %M. However, it must NOT contain % followed by anything else. */
3604
3605 if (*log_file_path != 0)
3606 {
3607 const uschar *ss, *sss;
3608 int sep = ':'; /* Fixed for log file path */
3609 s = expand_string(log_file_path);
3610 if (s == NULL)
3611 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3612 "\"%s\": %s", log_file_path, expand_string_message);
3613
3614 ss = s;
3615 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3616 {
3617 uschar *t;
3618 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3619 t = Ustrstr(sss, "%s");
3620 if (t == NULL)
3621 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3622 "contain \"%%s\"", sss);
3623 *t = 'X';
3624 t = Ustrchr(sss, '%');
3625 if (t != NULL)
3626 {
3627 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3628 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3629 "unexpected \"%%\" character", s);
3630 }
3631 }
3632
3633 log_file_path = s;
3634 }
3635
3636 /* Interpret syslog_facility into an integer argument for 'ident' param to
3637 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3638 leading "log_". */
3639
3640 if (syslog_facility_str != NULL)
3641 {
3642 int i;
3643 uschar *s = syslog_facility_str;
3644
3645 if ((Ustrlen(syslog_facility_str) >= 4) &&
3646 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3647 s += 4;
3648
3649 for (i = 0; i < syslog_list_size; i++)
3650 {
3651 if (strcmpic(s, syslog_list[i].name) == 0)
3652 {
3653 syslog_facility = syslog_list[i].value;
3654 break;
3655 }
3656 }
3657
3658 if (i >= syslog_list_size)
3659 {
3660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3661 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3662 }
3663 }
3664
3665 /* Expand pid_file_path */
3666
3667 if (*pid_file_path != 0)
3668 {
3669 s = expand_string(pid_file_path);
3670 if (s == NULL)
3671 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3672 "\"%s\": %s", pid_file_path, expand_string_message);
3673 pid_file_path = s;
3674 }
3675
3676 /* Set default value of process_log_path */
3677
3678 if (process_log_path == NULL || *process_log_path =='\0')
3679 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3680
3681 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3682 message. */
3683
3684 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3685
3686 /* Unpick the SMTP rate limiting options, if set */
3687
3688 if (smtp_ratelimit_mail != NULL)
3689 {
3690 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3691 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3692 }
3693
3694 if (smtp_ratelimit_rcpt != NULL)
3695 {
3696 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3697 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3698 }
3699
3700 /* The qualify domains default to the primary host name */
3701
3702 if (qualify_domain_sender == NULL)
3703 qualify_domain_sender = primary_hostname;
3704 if (qualify_domain_recipient == NULL)
3705 qualify_domain_recipient = qualify_domain_sender;
3706
3707 /* Setting system_filter_user in the configuration sets the gid as well if a
3708 name is given, but a numerical value does not. */
3709
3710 if (system_filter_uid_set && !system_filter_gid_set)
3711 {
3712 struct passwd *pw = getpwuid(system_filter_uid);
3713 if (pw == NULL)
3714 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3715 (long int)system_filter_uid);
3716 system_filter_gid = pw->pw_gid;
3717 system_filter_gid_set = TRUE;
3718 }
3719
3720 /* If the errors_reply_to field is set, check that it is syntactically valid
3721 and ensure it contains a domain. */
3722
3723 if (errors_reply_to != NULL)
3724 {
3725 uschar *errmess;
3726 int start, end, domain;
3727 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3728 &start, &end, &domain, FALSE);
3729
3730 if (recipient == NULL)
3731 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3732 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3733
3734 if (domain == 0)
3735 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3736 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3737 }
3738
3739 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3740 smtp_accept_max must also be set. */
3741
3742 if (smtp_accept_max == 0 &&
3743 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3744 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3745 "smtp_accept_max must be set if smtp_accept_queue or "
3746 "smtp_accept_max_per_host is set");
3747
3748 /* Set up the host number if anything is specified. It is an expanded string
3749 so that it can be computed from the host name, for example. We do this last
3750 so as to ensure that everything else is set up before the expansion. */
3751
3752 if (host_number_string != NULL)
3753 {
3754 long int n;
3755 uschar *end;
3756 uschar *s = expand_string(host_number_string);
3757 if (s == NULL)
3758 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3759 "failed to expand localhost_number \"%s\": %s",
3760 host_number_string, expand_string_message);
3761 n = Ustrtol(s, &end, 0);
3762 while (isspace(*end)) end++;
3763 if (*end != 0)
3764 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3765 "localhost_number value is not a number: %s", s);
3766 if (n > LOCALHOST_MAX)
3767 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3768 "localhost_number is greater than the maximum allowed value (%d)",
3769 LOCALHOST_MAX);
3770 host_number = n;
3771 }
3772
3773 #ifdef SUPPORT_TLS
3774 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3775
3776 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3777 tls_verify_certificates == NULL)
3778 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3779 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3780 (tls_verify_hosts != NULL)? "" : "try_");
3781
3782 /* This also checks that the library linkage is working and we can call
3783 routines in it, so call even if tls_require_ciphers is unset */
3784 if (!tls_dropprivs_validate_require_cipher(nowarn))
3785 exit(1);
3786
3787 /* Magic number: at time of writing, 1024 has been the long-standing value
3788 used by so many clients, and what Exim used to use always, that it makes
3789 sense to just min-clamp this max-clamp at that. */
3790 if (tls_dh_max_bits < 1024)
3791 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3792 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3793
3794 /* If openssl_options is set, validate it */
3795 if (openssl_options)
3796 {
3797 # ifdef USE_GNUTLS
3798 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3799 "openssl_options is set but we're using GnuTLS");
3800 # else
3801 long dummy;
3802 if (!tls_openssl_options_parse(openssl_options, &dummy))
3803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3804 "openssl_options parse error: %s", openssl_options);
3805 # endif
3806 }
3807 #endif /*SUPPORT_TLS*/
3808
3809 if (!nowarn && !keep_environment && environ && *environ)
3810 log_write(0, LOG_MAIN,
3811 "Warning: purging the environment.\n"
3812 " Suggested action: use keep_environment.");
3813 }
3814
3815
3816
3817 /*************************************************
3818 * Initialize one driver *
3819 *************************************************/
3820
3821 /* This is called once the driver's generic options, if any, have been read.
3822 We can now find the driver, set up defaults for the private options, and
3823 unset any "set" bits in the private options table (which might have been
3824 set by another incarnation of the same driver).
3825
3826 Arguments:
3827 d pointer to driver instance block, with generic
3828 options filled in
3829 drivers_available vector of available drivers
3830 size_of_info size of each block in drivers_available
3831 class class of driver, for error message
3832
3833 Returns: pointer to the driver info block
3834 */
3835
3836 static driver_info *
3837 init_driver(driver_instance *d, driver_info *drivers_available,
3838 int size_of_info, uschar *class)
3839 {
3840 driver_info *dd;
3841
3842 for (dd = drivers_available; dd->driver_name[0] != 0;
3843 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3844 {
3845 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3846 {
3847 int i;
3848 int len = dd->options_len;
3849 d->info = dd;
3850 d->options_block = store_get(len);
3851 memcpy(d->options_block, dd->options_block, len);
3852 for (i = 0; i < *(dd->options_count); i++)
3853 dd->options[i].type &= ~opt_set;
3854 return dd;
3855 }
3856 }
3857
3858 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3859 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3860
3861 return NULL; /* never obeyed */
3862 }
3863
3864
3865
3866
3867 /*************************************************
3868 * Initialize driver list *
3869 *************************************************/
3870
3871 /* This function is called for routers, transports, and authentication
3872 mechanisms. It reads the data from the current point in the configuration file
3873 up to the end of the section, and sets up a chain of instance blocks according
3874 to the file's contents. The file will already have been opened by a call to
3875 readconf_main, and must be left open for subsequent reading of further data.
3876
3877 Any errors cause a panic crash. Note that the blocks with names driver_info and
3878 driver_instance must map the first portions of all the _info and _instance
3879 blocks for this shared code to work.
3880
3881 Arguments:
3882 class "router", "transport", or "authenticator"
3883 anchor &routers, &transports, &auths
3884 drivers_available available drivers
3885 size_of_info size of each info block
3886 instance_default points to default data for an instance
3887 instance_size size of instance block
3888 driver_optionlist generic option list
3889 driver_optionlist_count count of generic option list
3890
3891 Returns: nothing
3892 */
3893
3894 void
3895 readconf_driver_init(
3896 uschar *class,
3897 driver_instance **anchor,
3898 driver_info *drivers_available,
3899 int size_of_info,
3900 void *instance_default,
3901 int instance_size,
3902 optionlist *driver_optionlist,
3903 int driver_optionlist_count)
3904 {
3905 driver_instance **p = anchor;
3906 driver_instance *d = NULL;
3907 uschar *buffer;
3908
3909 while ((buffer = get_config_line()) != NULL)
3910 {
3911 uschar name[64];
3912 uschar *s;
3913
3914 /* Read the first name on the line and test for the start of a new driver. A
3915 macro definition indicates the end of the previous driver. If this isn't the
3916 start of a new driver, the line will be re-read. */
3917
3918 s = readconf_readname(name, sizeof(name), buffer);
3919
3920 /* Handle macro definition, first finishing off the initialization of the
3921 previous driver, if any. */
3922
3923 if (isupper(*name) && *s == '=')
3924 {
3925 if (d)
3926 {
3927 if (!d->driver_name)
3928 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3929 "no driver defined for %s \"%s\"", class, d->name);
3930 (d->info->init)(d);
3931 d = NULL;
3932 }
3933 read_macro_assignment(buffer);
3934 continue;
3935 }
3936
3937 /* If the line starts with a name terminated by a colon, we are at the
3938 start of the definition of a new driver. The rest of the line must be
3939 blank. */
3940
3941 if (*s++ == ':')
3942 {
3943 int i;
3944
3945 /* Finish off initializing the previous driver. */
3946
3947 if (d)
3948 {
3949 if (!d->driver_name)
3950 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3951 "no driver defined for %s \"%s\"", class, d->name);
3952 (d->info->init)(d);
3953 }
3954
3955 /* Check that we haven't already got a driver of this name */
3956
3957 for (d = *anchor; d; d = d->next)
3958 if (Ustrcmp(name, d->name) == 0)
3959 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3960 "there are two %ss called \"%s\"", class, name);
3961
3962 /* Set up a new driver instance data block on the chain, with
3963 its default values installed. */
3964
3965 d = store_get(instance_size);
3966 memcpy(d, instance_default, instance_size);
3967 *p = d;
3968 p = &d->next;
3969 d->name = string_copy(name);
3970
3971 /* Clear out the "set" bits in the generic options */
3972
3973 for (i = 0; i < driver_optionlist_count; i++)
3974 driver_optionlist[i].type &= ~opt_set;
3975
3976 /* Check nothing more on this line, then do the next loop iteration. */
3977
3978 while (isspace(*s)) s++;
3979 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3980 continue;
3981 }
3982
3983 /* Not the start of a new driver. Give an error if we have not set up a
3984 current driver yet. */
3985
3986 if (!d)
3987 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3988
3989 /* First look to see if this is a generic option; if it is "driver",
3990 initialize the driver. If is it not a generic option, we can look for a
3991 private option provided that the driver has been previously set up. */
3992
3993 if (readconf_handle_option(buffer, driver_optionlist,
3994 driver_optionlist_count, d, NULL))
3995 {
3996 if (!d->info && d->driver_name)
3997 init_driver(d, drivers_available, size_of_info, class);
3998 }
3999
4000 /* Handle private options - pass the generic block because some may
4001 live therein. A flag with each option indicates if it is in the public
4002 block. */
4003
4004 else if (d->info)
4005 readconf_handle_option(buffer, d->info->options,
4006 *(d->info->options_count), d, US"option \"%s\" unknown");
4007
4008 /* The option is not generic and the driver name has not yet been given. */
4009
4010 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
4011 "(\"driver\" must be specified before any private options)", name);
4012 }
4013
4014 /* Run the initialization function for the final driver. */
4015
4016 if (d)
4017 {
4018 if (!d->driver_name)
4019 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
4020 "no driver defined for %s \"%s\"", class, d->name);
4021 (d->info->init)(d);
4022 }
4023 }
4024
4025
4026
4027 /*************************************************
4028 * Check driver dependency *
4029 *************************************************/
4030
4031 /* This function is passed a driver instance and a string. It checks whether
4032 any of the string options for the driver contains the given string as an
4033 expansion variable.
4034
4035 Arguments:
4036 d points to a driver instance block
4037 s the string to search for
4038
4039 Returns: TRUE if a dependency is found
4040 */
4041
4042 BOOL
4043 readconf_depends(driver_instance *d, uschar *s)
4044 {
4045 int count = *(d->info->options_count);
4046 optionlist *ol;
4047 uschar *ss;
4048
4049 for (ol = d->info->options; ol < d->info->options + count; ol++)
4050 {
4051 void *options_block;
4052 uschar *value;
4053 int type = ol->type & opt_mask;
4054 if (type != opt_stringptr) continue;
4055 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
4056 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
4057 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
4058 {
4059 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
4060 isalnum(ss[Ustrlen(s)])) continue;
4061 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
4062 d->name, ol->name, s);
4063 return TRUE;
4064 }
4065 }
4066
4067 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
4068 return FALSE;
4069 }
4070
4071
4072
4073
4074 /*************************************************
4075 * Decode an error type for retries *
4076 *************************************************/
4077
4078 /* This function is global because it is also called from the main
4079 program when testing retry information. It decodes strings such as "quota_7d"
4080 into numerical error codes.
4081
4082 Arguments:
4083 pp points to start of text
4084 p points past end of text
4085 basic_errno points to an int to receive the main error number
4086 more_errno points to an int to receive the secondary error data
4087
4088 Returns: NULL if decoded correctly; else points to error text
4089 */
4090
4091 uschar *
4092 readconf_retry_error(const uschar *pp, const uschar *p,
4093 int *basic_errno, int *more_errno)
4094 {
4095 int len;
4096 const uschar *q = pp;
4097 while (q < p && *q != '_') q++;
4098 len = q - pp;
4099
4100 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
4101 {
4102 *basic_errno = ERRNO_EXIMQUOTA;
4103 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
4104 return US"bad time value";
4105 }
4106
4107 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
4108 {
4109 *basic_errno = ECONNREFUSED;
4110 if (q != p)
4111 {
4112 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
4113 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
4114 else return US"A or MX expected after \"refused\"";
4115 }
4116 }
4117
4118 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
4119 {
4120 *basic_errno = ETIMEDOUT;
4121 if (q != p)
4122 {
4123 int i;
4124 int xlen = p - q - 1;
4125 const uschar *x = q + 1;
4126
4127 static uschar *extras[] =
4128 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
4129 static int values[] =
4130 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
4131
4132 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
4133 if (strncmpic(x, extras[i], xlen) == 0)
4134 {
4135 *more_errno = values[i];
4136 break;
4137 }
4138
4139 if (i >= sizeof(extras)/sizeof(uschar *))
4140 if (strncmpic(x, US"DNS", xlen) == 0)
4141 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
4142 "available in retry rules (it has never worked) - treated as "
4143 "\"timeout\"");
4144 else
4145 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
4146 }
4147 }
4148
4149 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
4150 strncmpic(pp, US"rcpt_4", 6) == 0 ||
4151 strncmpic(pp, US"data_4", 6) == 0)
4152 {
4153 BOOL bad = FALSE;
4154 int x = 255; /* means "any 4xx code" */
4155 if (p != pp + 8) bad = TRUE; else
4156 {
4157 int a = pp[6], b = pp[7];
4158 if (isdigit(a))
4159 {
4160 x = (a - '0') * 10;
4161 if (isdigit(b)) x += b - '0';
4162 else if (b == 'x') x += 100;
4163 else bad = TRUE;
4164 }
4165 else if (a != 'x' || b != 'x') bad = TRUE;
4166 }
4167
4168 if (bad)
4169 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4170 "x is literal and d is any digit", pp);
4171
4172 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4173 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4174 *more_errno = x << 8;
4175 }
4176
4177 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4178 strncmpic(q+1, US"failed", p-q-1) == 0)
4179 *basic_errno = ERRNO_AUTHFAIL;
4180
4181 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4182 *basic_errno = ERRNO_SMTPCLOSED;
4183
4184 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4185 *basic_errno = ERRNO_TLSREQUIRED;
4186
4187 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4188 *basic_errno = ERRNO_UNKNOWNHOST;
4189
4190 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4191 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4192
4193 return NULL;
4194 }
4195
4196
4197
4198
4199 /*************************************************
4200 * Read retry information *
4201 *************************************************/
4202
4203 /* Each line of retry information contains:
4204
4205 . A domain name pattern or an address pattern;
4206
4207 . An error name, possibly with additional data, or *;
4208
4209 . An optional sequence of retry items, each consisting of an identifying
4210 letter, a cutoff time, and optional parameters.
4211
4212 All this is decoded and placed into a control block. */
4213
4214
4215 /* Subroutine to read an argument, preceded by a comma and terminated
4216 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4217 1 = fixed point number (returned *1000).
4218
4219 Arguments:
4220 paddr pointer to pointer to current character; updated
4221 type 0 => read a time; 1 => read a fixed point number
4222
4223 Returns: time in seconds or fixed point number * 1000
4224 */
4225
4226 static int
4227 retry_arg(const uschar **paddr, int type)
4228 {
4229 const uschar *p = *paddr;
4230 const uschar *pp;
4231
4232 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4233
4234 while (isspace(*p)) p++;
4235 pp = p;
4236 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4237
4238 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
4239 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4240
4241 *paddr = p;
4242 switch (type)
4243 {
4244 case 0: return readconf_readtime(pp, *p, FALSE);
4245 case 1: return readconf_readfixed(pp, *p);
4246 }
4247 return 0; /* Keep picky compilers happy */
4248 }
4249
4250 /* The function proper */
4251
4252 void
4253 readconf_retries(void)
4254 {
4255 retry_config **chain = &retries;
4256 retry_config *next;
4257 const uschar *p;
4258
4259 while ((p = get_config_line()))
4260 {
4261 retry_rule **rchain;
4262 const uschar *pp;
4263 uschar *error;
4264
4265 next = store_get(sizeof(retry_config));
4266 next->next = NULL;
4267 *chain = next;
4268 chain = &(next->next);
4269 next->basic_errno = next->more_errno = 0;
4270 next->senders = NULL;
4271 next->rules = NULL;
4272 rchain = &(next->rules);
4273
4274 next->pattern = string_dequote(&p);
4275 while (isspace(*p)) p++;
4276 pp = p;
4277 while (mac_isgraph(*p)) p++;
4278 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4279 "missing error type in retry rule");
4280
4281 /* Test error names for things we understand. */
4282
4283 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4284 &next->more_errno)))
4285 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4286
4287 /* There may be an optional address list of senders to be used as another
4288 constraint on the rule. This was added later, so the syntax is a bit of a
4289 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4290 an address list. */
4291
4292 while (isspace(*p)) p++;
4293 if (Ustrncmp(p, "senders", 7) == 0)
4294 {
4295 p += 7;
4296 while (isspace(*p)) p++;
4297 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4298 "\"=\" expected after \"senders\" in retry rule");
4299 while (isspace(*p)) p++;
4300 next->senders = string_dequote(&p);
4301 }
4302
4303 /* Now the retry rules. Keep the maximum timeout encountered. */
4304
4305 while (isspace(*p)) p++;
4306
4307 while (*p != 0)
4308 {
4309 retry_rule *rule = store_get(sizeof(retry_rule));
4310 *rchain = rule;
4311 rchain = &(rule->next);
4312 rule->next = NULL;
4313 rule->rule = toupper(*p++);
4314 rule->timeout = retry_arg(&p, 0);
4315 if (rule->timeout > retry_maximum_timeout)
4316 retry_maximum_timeout = rule->timeout;
4317
4318 switch (rule->rule)
4319 {
4320 case 'F': /* Fixed interval */
4321 rule->p1 = retry_arg(&p, 0);
4322 break;
4323
4324 case 'G': /* Geometrically increasing intervals */
4325 case 'H': /* Ditto, but with randomness */
4326 rule->p1 = retry_arg(&p, 0);
4327 rule->p2 = retry_arg(&p, 1);
4328 break;
4329
4330 default:
4331 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4332 break;
4333 }
4334
4335 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4336 (rule->rule != 'F' && rule->p2 < 1000))
4337 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4338 "bad parameters for retry rule");
4339
4340 while (isspace(*p)) p++;
4341 if (*p == ';')
4342 {
4343 p++;
4344 while (isspace(*p)) p++;
4345 }
4346 else if (*p != 0)
4347 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4348 }
4349 }
4350 }
4351
4352
4353
4354 /*************************************************
4355 * Initialize authenticators *
4356 *************************************************/
4357
4358 static void
4359 readconf_options_auths(void)
4360 {
4361 struct auth_info * ai;
4362
4363 readconf_options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
4364
4365 for (ai = auths_available; ai->driver_name[0]; ai++)
4366 {
4367 macro_create(string_sprintf("_DRIVER_AUTHENTICATOR_%T", ai->driver_name), US"y", FALSE, TRUE);
4368 readconf_options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
4369 }
4370 }
4371
4372
4373 /* Read the authenticators section of the configuration file.
4374
4375 Arguments: none
4376 Returns: nothing
4377 */
4378
4379 static void
4380 auths_init(void)
4381 {
4382 auth_instance *au, *bu;
4383
4384 readconf_driver_init(US"authenticator",
4385 (driver_instance **)(&auths), /* chain anchor */
4386 (driver_info *)auths_available, /* available drivers */
4387 sizeof(auth_info), /* size of info block */
4388 &auth_defaults, /* default values for generic options */
4389 sizeof(auth_instance), /* size of instance block */
4390 optionlist_auths, /* generic options */
4391 optionlist_auths_size);
4392
4393 for (au = auths; au; au = au->next)
4394 {
4395 if (!au->public_name)
4396 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4397 "the %s authenticator", au->name);
4398
4399 for (bu = au->next; bu; bu = bu->next)
4400 if (strcmpic(au->public_name, bu->public_name) == 0)
4401 if ((au->client && bu->client) || (au->server && bu->server))
4402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4403 "(%s and %s) have the same public name (%s)",
4404 au->client ? US"client" : US"server", au->name, bu->name,
4405 au->public_name);
4406 }
4407 }
4408
4409
4410
4411
4412 /*************************************************
4413 * Read ACL information *
4414 *************************************************/
4415
4416 /* If this run of Exim is not doing something that involves receiving a
4417 message, we can just skip over the ACL information. No need to parse it.
4418
4419 First, we have a function for acl_read() to call back to get the next line. We
4420 need to remember the line we passed, because at the end it will contain the
4421 name of the next ACL. */
4422
4423 static uschar *acl_line;
4424
4425 static uschar *
4426 acl_callback(void)
4427 {
4428 acl_line = get_config_line();
4429 return acl_line;
4430 }
4431
4432
4433 /* Now the main function:
4434
4435 Arguments: none
4436 Returns: nothing
4437 */
4438
4439 static void
4440 readconf_acl(void)
4441 {
4442 uschar *p;
4443
4444 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4445 between ACLs. */
4446
4447 acl_line = get_config_line();
4448
4449 while(acl_line != NULL)
4450 {
4451 uschar name[64];
4452 tree_node *node;
4453 uschar *error;
4454
4455 p = readconf_readname(name, sizeof(name), acl_line);
4456 if (isupper(*name) && *p == '=')
4457 {
4458 read_macro_assignment(acl_line);
4459 acl_line = get_config_line();
4460 continue;
4461 }
4462
4463 if (*p != ':' || name[0] == 0)
4464 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4465
4466 node = store_get(sizeof(tree_node) + Ustrlen(name));
4467 Ustrcpy(node->name, name);
4468 if (!tree_insertnode(&acl_anchor, node))
4469 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4470 "there are two ACLs called \"%s\"", name);
4471
4472 node->data.ptr = acl_read(acl_callback, &error);
4473
4474 if (node->data.ptr == NULL && error != NULL)
4475 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4476 }
4477 }
4478
4479
4480
4481 /*************************************************
4482 * Read configuration for local_scan() *
4483 *************************************************/
4484
4485 /* This function is called after "begin local_scan" is encountered in the
4486 configuration file. If the local_scan() function allows for configuration
4487 options, we can process them. Otherwise, we expire in a panic.
4488
4489 Arguments: none
4490 Returns: nothing
4491 */
4492
4493 static void
4494 local_scan_init(void)
4495 {
4496 #ifndef LOCAL_SCAN_HAS_OPTIONS
4497 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4498 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4499 #else
4500
4501 uschar *p;
4502 while ((p = get_config_line()) != NULL)
4503 {
4504 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4505 NULL, US"local_scan option \"%s\" unknown");
4506 }
4507 #endif
4508 }
4509
4510
4511
4512 /*************************************************
4513 * Read rest of configuration (after main) *
4514 *************************************************/
4515
4516 /* This function reads the rest of the runtime configuration, after the main
4517 configuration. It is called only when actually needed. Each subsequent section
4518 of the configuration starts with a line of the form
4519
4520 begin name
4521
4522 where the name is "routers", "transports", etc. A section is terminated by
4523 hitting the next "begin" line, and the next name is left in next_section.
4524 Because it may confuse people as to whether the names are singular or plural,
4525 we add "s" if it's missing. There is always enough room in next_section for
4526 this. This function is basically just a switch.
4527
4528 Arguments: none
4529 Returns: nothing
4530 */
4531
4532 static uschar *section_list[] = {
4533 US"acls",
4534 US"authenticators",
4535 US"local_scans",
4536 US"retrys",
4537 US"rewrites",
4538 US"routers",
4539 US"transports"};
4540
4541 void
4542 readconf_rest(void)
4543 {
4544 int had = 0;
4545
4546 while(next_section[0] != 0)
4547 {
4548 int bit;
4549 int first = 0;
4550 int last = sizeof(section_list) / sizeof(uschar *);
4551 int mid = last/2;
4552 int n = Ustrlen(next_section);
4553
4554 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4555
4556 for (;;)
4557 {
4558 int c = strcmpic(next_section, section_list[mid]);
4559 if (c == 0) break;
4560 if (c > 0) first = mid + 1; else last = mid;
4561 if (first >= last)
4562 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4563 "\"%.*s\" is not a known configuration section name", n, next_section);
4564 mid = (last + first)/2;
4565 }
4566
4567 bit = 1 << mid;
4568 if (((had ^= bit) & bit) == 0)
4569 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4570 "\"%.*s\" section is repeated in the configuration file", n,
4571 next_section);
4572
4573 switch(mid)
4574 {
4575 case 0: readconf_acl(); break;
4576 case 1: auths_init(); break;
4577 case 2: local_scan_init(); break;
4578 case 3: readconf_retries(); break;
4579 case 4: readconf_rewrites(); break;
4580 case 5: route_init(); break;
4581 case 6: transport_init(); break;
4582 }
4583 }
4584
4585 (void)fclose(config_file);
4586 }
4587
4588 /* Init the storage for the pre-parsed config lines */
4589 void
4590 readconf_save_config(const uschar *s)
4591 {
4592 save_config_line(string_sprintf("# Exim Configuration (%s)",
4593 running_in_test_harness ? US"X" : s));
4594 }
4595
4596 static void
4597 save_config_position(const uschar *file, int line)
4598 {
4599 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4600 }
4601
4602 /* Append a pre-parsed logical line to the config lines store,
4603 this operates on a global (static) list that holds all the pre-parsed
4604 config lines, we do no further processing here, output formatting and
4605 honouring of <hide> or macros will be done during output */
4606 static void
4607 save_config_line(const uschar* line)
4608 {
4609 static config_line_item *current;
4610 config_line_item *next;
4611
4612 next = (config_line_item*) store_get(sizeof(config_line_item));
4613 next->line = string_copy(line);
4614 next->next = NULL;
4615
4616 if (!config_lines) config_lines = next;
4617 else current->next = next;
4618
4619 current = next;
4620 }
4621
4622 /* List the parsed config lines, care about nice formatting and
4623 hide the <hide> values unless we're the admin user */
4624 void
4625 print_config(BOOL admin, BOOL terse)
4626 {
4627 config_line_item *i;
4628 const int TS = terse ? 0 : 2;
4629 int indent = 0;
4630
4631 for (i = config_lines; i; i = i->next)
4632 {
4633 uschar *current;
4634 uschar *p;
4635
4636 /* skip over to the first non-space */
4637 for (current = i->line; *current && isspace(*current); ++current)
4638 ;
4639
4640 if (*current == '\0')
4641 continue;
4642
4643 /* Collapse runs of spaces. We stop this if we encounter one of the
4644 * following characters: "'$, as this may indicate careful formatting */
4645 for (p = current; *p; ++p)
4646 {
4647 uschar *next;
4648 if (!isspace(*p)) continue;
4649 if (*p != ' ') *p = ' ';
4650
4651 for (next = p; isspace(*next); ++next)
4652 ;
4653
4654 if (next - p > 1)
4655 memmove(p+1, next, Ustrlen(next)+1);
4656
4657 if (*next == '"' || *next == '\'' || *next == '$')
4658 break;
4659 }
4660
4661 /* # lines */
4662 if (current[0] == '#')
4663 puts(CCS current);
4664
4665 /* begin lines are left aligned */
4666 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4667 {
4668 if (!terse) puts("");
4669 puts(CCS current);
4670 indent = TS;
4671 }
4672
4673 /* router/acl/transport block names */
4674 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4675 {
4676 if (!terse) puts("");
4677 printf("%*s%s\n", TS, "", current);
4678 indent = 2 * TS;
4679 }
4680
4681 /* hidden lines (all MACROS or lines prefixed with "hide") */
4682 else if ( !admin
4683 && ( isupper(*current)
4684 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4685 )
4686 )
4687 {
4688 if ((p = Ustrchr(current, '=')))
4689 {
4690 *p = '\0';
4691 printf("%*s%s= %s\n", indent, "", current, hidden);
4692 }
4693 /* e.g.: hide split_spool_directory */
4694 else
4695 printf("%*s\n", indent, hidden);
4696 }
4697
4698 else
4699 /* rest is public */
4700 printf("%*s%s\n", indent, "", current);
4701 }
4702 }
4703
4704 /* vi: aw ai sw=2
4705 */
4706 /* End of readconf.c */
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