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