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