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Add the NOTQUIT ACL.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.32 2007/08/22 10:10:23 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* Functions for reading the configuration file, and for displaying
11 overall configuration values. Thanks to Brian Candler for the original
12 implementation of the conditional .ifdef etc. */
13
14 #include "exim.h"
15
16 #define CSTATE_STACK_SIZE 10
17
18
19 /* Structure for chain (stack) of .included files */
20
21 typedef struct config_file_item {
22 struct config_file_item *next;
23 uschar *filename;
24 FILE *file;
25 int lineno;
26 } config_file_item;
27
28 /* Structure of table of conditional words and their state transitions */
29
30 typedef struct cond_item {
31 uschar *name;
32 int namelen;
33 int action1;
34 int action2;
35 int pushpop;
36 } cond_item;
37
38 /* Structure of table of syslog facility names and values */
39
40 typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43 } syslog_fac_item;
44
45
46 /* Static variables */
47
48 static config_file_item *config_file_stack = NULL; /* For includes */
49
50 static uschar *syslog_facility_str = NULL;
51 static uschar next_section[24];
52 static uschar time_buffer[24];
53
54 /* State variables for conditional loading (.ifdef / .else / .endif) */
55
56 static int cstate = 0;
57 static int cstate_stack_ptr = -1;
58 static int cstate_stack[CSTATE_STACK_SIZE];
59
60 /* Table of state transitions for handling conditional inclusions. There are
61 four possible state transitions:
62
63 .ifdef true
64 .ifdef false
65 .elifdef true (or .else)
66 .elifdef false
67
68 .endif just causes the previous cstate to be popped off the stack */
69
70 static int next_cstate[3][4] =
71 {
72 /* State 0: reading from file, or reading until next .else or .endif */
73 { 0, 1, 2, 2 },
74 /* State 1: condition failed, skipping until next .else or .endif */
75 { 2, 2, 0, 1 },
76 /* State 2: skipping until .endif */
77 { 2, 2, 2, 2 },
78 };
79
80 /* Table of conditionals and the states to set. For each name, there are four
81 values: the length of the name (to save computing it each time), the state to
82 set if a macro was found in the line, the state to set if a macro was not found
83 in the line, and a stack manipulation setting which is:
84
85 -1 pull state value off the stack
86 0 don't alter the stack
87 +1 push value onto stack, before setting new state
88 */
89
90 static cond_item cond_list[] = {
91 { US"ifdef", 5, 0, 1, 1 },
92 { US"ifndef", 6, 1, 0, 1 },
93 { US"elifdef", 7, 2, 3, 0 },
94 { US"elifndef", 8, 3, 2, 0 },
95 { US"else", 4, 2, 2, 0 },
96 { US"endif", 5, 0, 0, -1 }
97 };
98
99 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101 /* Table of syslog facility names and their values */
102
103 static syslog_fac_item syslog_list[] = {
104 { US"mail", LOG_MAIL },
105 { US"user", LOG_USER },
106 { US"news", LOG_NEWS },
107 { US"uucp", LOG_UUCP },
108 { US"local0", LOG_LOCAL0 },
109 { US"local1", LOG_LOCAL1 },
110 { US"local2", LOG_LOCAL2 },
111 { US"local3", LOG_LOCAL3 },
112 { US"local4", LOG_LOCAL4 },
113 { US"local5", LOG_LOCAL5 },
114 { US"local6", LOG_LOCAL6 },
115 { US"local7", LOG_LOCAL7 },
116 { US"daemon", LOG_DAEMON }
117 };
118
119 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
120
121
122
123
124 /*************************************************
125 * Main configuration options *
126 *************************************************/
127
128 /* The list of options that can be set in the main configuration file. This
129 must be in alphabetic order because it is searched by binary chop. */
130
131 static optionlist optionlist_config[] = {
132 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
133 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
134 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
135 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
136 { "accept_8bitmime", opt_bool, &accept_8bitmime },
137 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
138 #ifdef WITH_CONTENT_SCAN
139 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
140 #endif
141 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
142 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
143 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
144 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
145 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
146 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
147 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
148 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
149 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
150 #ifdef WITH_CONTENT_SCAN
151 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
152 #endif
153 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
154 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
155 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
156 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
157 #ifdef SUPPORT_TLS
158 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
159 #endif
160 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
161 { "admin_groups", opt_gidlist, &admin_groups },
162 { "allow_domain_literals", opt_bool, &allow_domain_literals },
163 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
164 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
165 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
166 { "auto_thaw", opt_time, &auto_thaw },
167 #ifdef WITH_CONTENT_SCAN
168 { "av_scanner", opt_stringptr, &av_scanner },
169 #endif
170 { "bi_command", opt_stringptr, &bi_command },
171 #ifdef EXPERIMENTAL_BRIGHTMAIL
172 { "bmi_config_file", opt_stringptr, &bmi_config_file },
173 #endif
174 { "bounce_message_file", opt_stringptr, &bounce_message_file },
175 { "bounce_message_text", opt_stringptr, &bounce_message_text },
176 { "bounce_return_body", opt_bool, &bounce_return_body },
177 { "bounce_return_message", opt_bool, &bounce_return_message },
178 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
179 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
180 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
181 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
182 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
183 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
184 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
185 { "check_log_inodes", opt_int, &check_log_inodes },
186 { "check_log_space", opt_Kint, &check_log_space },
187 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
188 { "check_spool_inodes", opt_int, &check_spool_inodes },
189 { "check_spool_space", opt_Kint, &check_spool_space },
190 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
191 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
192 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
193 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
194 { "delay_warning", opt_timelist, &delay_warning },
195 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
196 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
197 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
198 { "delivery_date_remove", opt_bool, &delivery_date_remove },
199 #ifdef ENABLE_DISABLE_FSYNC
200 { "disable_fsync", opt_bool, &disable_fsync },
201 #endif
202 { "disable_ipv6", opt_bool, &disable_ipv6 },
203 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
204 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
205 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
206 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
207 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
208 { "dns_retrans", opt_time, &dns_retrans },
209 { "dns_retry", opt_int, &dns_retry },
210 /* This option is now a no-op, retained for compability */
211 { "drop_cr", opt_bool, &drop_cr },
212 /*********************************************************/
213 { "dsn_from", opt_stringptr, &dsn_from },
214 { "envelope_to_remove", opt_bool, &envelope_to_remove },
215 { "errors_copy", opt_stringptr, &errors_copy },
216 { "errors_reply_to", opt_stringptr, &errors_reply_to },
217 { "exim_group", opt_gid, &exim_gid },
218 { "exim_path", opt_stringptr, &exim_path },
219 { "exim_user", opt_uid, &exim_uid },
220 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
221 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
222 { "finduser_retries", opt_int, &finduser_retries },
223 { "freeze_tell", opt_stringptr, &freeze_tell },
224 { "gecos_name", opt_stringptr, &gecos_name },
225 { "gecos_pattern", opt_stringptr, &gecos_pattern },
226 #ifdef SUPPORT_TLS
227 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
228 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
229 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
230 #endif
231 { "header_line_maxsize", opt_int, &header_line_maxsize },
232 { "header_maxsize", opt_int, &header_maxsize },
233 { "headers_charset", opt_stringptr, &headers_charset },
234 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
235 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
236 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
237 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
238 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
239 { "hold_domains", opt_stringptr, &hold_domains },
240 { "host_lookup", opt_stringptr, &host_lookup },
241 { "host_lookup_order", opt_stringptr, &host_lookup_order },
242 { "host_reject_connection", opt_stringptr, &host_reject_connection },
243 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
244 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
245 #ifdef LOOKUP_IBASE
246 { "ibase_servers", opt_stringptr, &ibase_servers },
247 #endif
248 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
249 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
250 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
251 { "keep_malformed", opt_time, &keep_malformed },
252 #ifdef LOOKUP_LDAP
253 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
254 { "ldap_version", opt_int, &eldap_version },
255 #endif
256 { "local_from_check", opt_bool, &local_from_check },
257 { "local_from_prefix", opt_stringptr, &local_from_prefix },
258 { "local_from_suffix", opt_stringptr, &local_from_suffix },
259 { "local_interfaces", opt_stringptr, &local_interfaces },
260 { "local_scan_timeout", opt_time, &local_scan_timeout },
261 { "local_sender_retain", opt_bool, &local_sender_retain },
262 { "localhost_number", opt_stringptr, &host_number_string },
263 { "log_file_path", opt_stringptr, &log_file_path },
264 { "log_selector", opt_stringptr, &log_selector_string },
265 { "log_timezone", opt_bool, &log_timezone },
266 { "lookup_open_max", opt_int, &lookup_open_max },
267 { "max_username_length", opt_int, &max_username_length },
268 { "message_body_visible", opt_mkint, &message_body_visible },
269 { "message_id_header_domain", opt_stringptr, &message_id_domain },
270 { "message_id_header_text", opt_stringptr, &message_id_text },
271 { "message_logs", opt_bool, &message_logs },
272 { "message_size_limit", opt_stringptr, &message_size_limit },
273 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
274 { "move_frozen_messages", opt_bool, &move_frozen_messages },
275 #endif
276 { "mua_wrapper", opt_bool, &mua_wrapper },
277 #ifdef LOOKUP_MYSQL
278 { "mysql_servers", opt_stringptr, &mysql_servers },
279 #endif
280 { "never_users", opt_uidlist, &never_users },
281 #ifdef LOOKUP_ORACLE
282 { "oracle_servers", opt_stringptr, &oracle_servers },
283 #endif
284 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
285 #ifdef EXIM_PERL
286 { "perl_at_start", opt_bool, &opt_perl_at_start },
287 { "perl_startup", opt_stringptr, &opt_perl_startup },
288 #endif
289 #ifdef LOOKUP_PGSQL
290 { "pgsql_servers", opt_stringptr, &pgsql_servers },
291 #endif
292 { "pid_file_path", opt_stringptr, &pid_file_path },
293 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
294 { "preserve_message_logs", opt_bool, &preserve_message_logs },
295 { "primary_hostname", opt_stringptr, &primary_hostname },
296 { "print_topbitchars", opt_bool, &print_topbitchars },
297 { "process_log_path", opt_stringptr, &process_log_path },
298 { "prod_requires_admin", opt_bool, &prod_requires_admin },
299 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
300 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
301 { "queue_domains", opt_stringptr, &queue_domains },
302 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
303 { "queue_only", opt_bool, &queue_only },
304 { "queue_only_file", opt_stringptr, &queue_only_file },
305 { "queue_only_load", opt_fixed, &queue_only_load },
306 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
307 { "queue_only_override", opt_bool, &queue_only_override },
308 { "queue_run_in_order", opt_bool, &queue_run_in_order },
309 { "queue_run_max", opt_int, &queue_run_max },
310 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
311 { "receive_timeout", opt_time, &receive_timeout },
312 { "received_header_text", opt_stringptr, &received_header_text },
313 { "received_headers_max", opt_int, &received_headers_max },
314 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
315 { "recipients_max", opt_int, &recipients_max },
316 { "recipients_max_reject", opt_bool, &recipients_max_reject },
317 { "remote_max_parallel", opt_int, &remote_max_parallel },
318 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
319 { "retry_data_expire", opt_time, &retry_data_expire },
320 { "retry_interval_max", opt_time, &retry_interval_max },
321 { "return_path_remove", opt_bool, &return_path_remove },
322 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
323 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
324 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
325 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
326 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
327 { "smtp_accept_max", opt_int, &smtp_accept_max },
328 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
329 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
330 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
331 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
332 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
333 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
334 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
335 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
336 { "smtp_banner", opt_stringptr, &smtp_banner },
337 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
338 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
339 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
340 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
341 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
342 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
343 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
344 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
345 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
346 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
347 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
348 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
349 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
350 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
351 #ifdef WITH_CONTENT_SCAN
352 { "spamd_address", opt_stringptr, &spamd_address },
353 #endif
354 { "split_spool_directory", opt_bool, &split_spool_directory },
355 { "spool_directory", opt_stringptr, &spool_directory },
356 #ifdef LOOKUP_SQLITE
357 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
358 #endif
359 #ifdef EXPERIMENTAL_SRS
360 { "srs_config", opt_stringptr, &srs_config },
361 { "srs_hashlength", opt_int, &srs_hashlength },
362 { "srs_hashmin", opt_int, &srs_hashmin },
363 { "srs_maxage", opt_int, &srs_maxage },
364 { "srs_secrets", opt_stringptr, &srs_secrets },
365 { "srs_usehash", opt_bool, &srs_usehash },
366 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
367 #endif
368 { "strict_acl_vars", opt_bool, &strict_acl_vars },
369 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
370 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
371 { "syslog_duplication", opt_bool, &syslog_duplication },
372 { "syslog_facility", opt_stringptr, &syslog_facility_str },
373 { "syslog_processname", opt_stringptr, &syslog_processname },
374 { "syslog_timestamp", opt_bool, &syslog_timestamp },
375 { "system_filter", opt_stringptr, &system_filter },
376 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
377 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
378 { "system_filter_group", opt_gid, &system_filter_gid },
379 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
380 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
381 { "system_filter_user", opt_uid, &system_filter_uid },
382 { "tcp_nodelay", opt_bool, &tcp_nodelay },
383 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
384 { "timezone", opt_stringptr, &timezone_string },
385 #ifdef SUPPORT_TLS
386 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
387 { "tls_certificate", opt_stringptr, &tls_certificate },
388 { "tls_crl", opt_stringptr, &tls_crl },
389 { "tls_dhparam", opt_stringptr, &tls_dhparam },
390 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
391 { "tls_privatekey", opt_stringptr, &tls_privatekey },
392 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
393 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
394 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
395 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
396 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
397 #endif
398 { "trusted_groups", opt_gidlist, &trusted_groups },
399 { "trusted_users", opt_uidlist, &trusted_users },
400 { "unknown_login", opt_stringptr, &unknown_login },
401 { "unknown_username", opt_stringptr, &unknown_username },
402 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
403 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
404 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
405 { "warn_message_file", opt_stringptr, &warn_message_file },
406 { "write_rejectlog", opt_bool, &write_rejectlog }
407 };
408
409 static int optionlist_config_size =
410 sizeof(optionlist_config)/sizeof(optionlist);
411
412
413
414 /*************************************************
415 * Find the name of an option *
416 *************************************************/
417
418 /* This function is to aid debugging. Various functions take arguments that are
419 pointer variables in the options table or in option tables for various drivers.
420 For debugging output, it is useful to be able to find the name of the option
421 which is currently being processed. This function finds it, if it exists, by
422 searching the table(s).
423
424 Arguments: a value that is presumed to be in the table above
425 Returns: the option name, or an empty string
426 */
427
428 uschar *
429 readconf_find_option(void *p)
430 {
431 int i;
432 router_instance *r;
433 transport_instance *t;
434
435 for (i = 0; i < optionlist_config_size; i++)
436 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
437
438 for (r = routers; r != NULL; r = r->next)
439 {
440 router_info *ri = r->info;
441 for (i = 0; i < ri->options_count[0]; i++)
442 {
443 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
444 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
445 return US ri->options[i].name;
446 }
447 }
448
449 for (t = transports; t != NULL; t = t->next)
450 {
451 transport_info *ti = t->info;
452 for (i = 0; i < ti->options_count[0]; i++)
453 {
454 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
455 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
456 return US ti->options[i].name;
457 }
458 }
459
460 return US"";
461 }
462
463
464
465
466 /*************************************************
467 * Deal with an assignment to a macro *
468 *************************************************/
469
470 /* This function is called when a line that starts with an upper case letter is
471 encountered. The argument "line" should contain a complete logical line, and
472 start with the first letter of the macro name. The macro name and the
473 replacement text are extracted and stored. Redefinition of existing,
474 non-command line, macros is permitted using '==' instead of '='.
475
476 Arguments:
477 s points to the start of the logical line
478
479 Returns: nothing
480 */
481
482 static void
483 read_macro_assignment(uschar *s)
484 {
485 uschar name[64];
486 int namelen = 0;
487 BOOL redef = FALSE;
488 macro_item *m;
489 macro_item *mlast = NULL;
490
491 while (isalnum(*s) || *s == '_')
492 {
493 if (namelen >= sizeof(name) - 1)
494 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
495 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
496 name[namelen++] = *s++;
497 }
498 name[namelen] = 0;
499
500 while (isspace(*s)) s++;
501 if (*s++ != '=')
502 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
503
504 if (*s == '=')
505 {
506 redef = TRUE;
507 s++;
508 }
509 while (isspace(*s)) s++;
510
511 /* If an existing macro of the same name was defined on the command line, we
512 just skip this definition. It's an error to attempt to redefine a macro without
513 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
514 It is also an error to define a macro whose name begins with the name of a
515 previously defined macro. Note: it is documented that the other way round
516 works. */
517
518 for (m = macros; m != NULL; m = m->next)
519 {
520 int len = Ustrlen(m->name);
521
522 if (Ustrcmp(m->name, name) == 0)
523 {
524 if (!m->command_line && !redef)
525 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
526 "defined (use \"==\" if you want to redefine it", name);
527 break;
528 }
529
530 if (len < namelen && Ustrstr(name, m->name) != NULL)
531 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
532 "a macro because previously defined macro \"%s\" is a substring",
533 name, m->name);
534
535 /* We cannot have this test, because it is documented that a substring
536 macro is permitted (there is even an example).
537 *
538 * if (len > namelen && Ustrstr(m->name, name) != NULL)
539 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
540 * "a macro because it is a substring of previously defined macro \"%s\"",
541 * name, m->name);
542 */
543
544 mlast = m;
545 }
546
547 /* Check for an overriding command-line definition. */
548
549 if (m != NULL && m->command_line) return;
550
551 /* Redefinition must refer to an existing macro. */
552
553 if (redef)
554 {
555 if (m == NULL)
556 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
557 "\"%s\"", name);
558 }
559
560 /* We have a new definition. The macro_item structure includes a final vector
561 called "name" which is one byte long. Thus, adding "namelen" gives us enough
562 room to store the "name" string. */
563
564 else
565 {
566 m = store_get(sizeof(macro_item) + namelen);
567 if (macros == NULL) macros = m; else mlast->next = m;
568 Ustrncpy(m->name, name, namelen);
569 m->name[namelen] = 0;
570 m->next = NULL;
571 m->command_line = FALSE;
572 }
573
574 /* Set the value of the new or redefined macro */
575
576 m->replacement = string_copy(s);
577 }
578
579
580
581
582
583 /*************************************************
584 * Read configuration line *
585 *************************************************/
586
587 /* A logical line of text is read from the configuration file into the big
588 buffer, taking account of macros, .includes, and continuations. The size of
589 big_buffer is increased if necessary. The count of configuration lines is
590 maintained. Physical input lines starting with # (ignoring leading white space,
591 and after macro replacement) and empty logical lines are always ignored.
592 Leading and trailing spaces are removed.
593
594 If we hit a line of the form "begin xxxx", the xxxx is placed in the
595 next_section vector, and the function returns NULL, indicating the end of a
596 configuration section. On end-of-file, NULL is returned with next_section
597 empty.
598
599 Arguments: none
600
601 Returns: a pointer to the first non-blank in the line,
602 or NULL if eof or end of section is reached
603 */
604
605 static uschar *
606 get_config_line(void)
607 {
608 int startoffset = 0; /* To first non-blank char in logical line */
609 int len = 0; /* Of logical line so far */
610 int newlen;
611 uschar *s, *ss;
612 macro_item *m;
613 BOOL macro_found;
614
615 /* Loop for handling continuation lines, skipping comments, and dealing with
616 .include files. */
617
618 for (;;)
619 {
620 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
621 {
622 if (config_file_stack != NULL) /* EOF inside .include */
623 {
624 (void)fclose(config_file);
625 config_file = config_file_stack->file;
626 config_filename = config_file_stack->filename;
627 config_lineno = config_file_stack->lineno;
628 config_file_stack = config_file_stack->next;
629 continue;
630 }
631
632 /* EOF at top level */
633
634 if (cstate_stack_ptr >= 0)
635 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
636 "Unexpected end of configuration file: .endif missing");
637
638 if (len != 0) break; /* EOF after continuation */
639 next_section[0] = 0; /* EOF at start of logical line */
640 return NULL;
641 }
642
643 config_lineno++;
644 newlen = len + Ustrlen(big_buffer + len);
645
646 /* Handle pathologically long physical lines - yes, it did happen - by
647 extending big_buffer at this point. The code also copes with very long
648 logical lines. */
649
650 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
651 {
652 uschar *newbuffer;
653 big_buffer_size += BIG_BUFFER_SIZE;
654 newbuffer = store_malloc(big_buffer_size);
655
656 /* This use of strcpy is OK because we know that the string in the old
657 buffer is shorter than the new buffer. */
658
659 Ustrcpy(newbuffer, big_buffer);
660 store_free(big_buffer);
661 big_buffer = newbuffer;
662 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
663 break;
664 newlen += Ustrlen(big_buffer + newlen);
665 }
666
667 /* Find the true start of the physical line - leading spaces are always
668 ignored. */
669
670 ss = big_buffer + len;
671 while (isspace(*ss)) ss++;
672
673 /* Process the physical line for macros. If this is the start of the logical
674 line, skip over initial text at the start of the line if it starts with an
675 upper case character followed by a sequence of name characters and an equals
676 sign, because that is the definition of a new macro, and we don't do
677 replacement therein. */
678
679 s = ss;
680 if (len == 0 && isupper(*s))
681 {
682 while (isalnum(*s) || *s == '_') s++;
683 while (isspace(*s)) s++;
684 if (*s != '=') s = ss; /* Not a macro definition */
685 }
686
687 /* For each defined macro, scan the line (from after XXX= if present),
688 replacing all occurrences of the macro. */
689
690 macro_found = FALSE;
691 for (m = macros; m != NULL; m = m->next)
692 {
693 uschar *p, *pp;
694 uschar *t = s;
695
696 while ((p = Ustrstr(t, m->name)) != NULL)
697 {
698 int moveby;
699 int namelen = Ustrlen(m->name);
700 int replen = Ustrlen(m->replacement);
701
702 /* Expand the buffer if necessary */
703
704 while (newlen - namelen + replen + 1 > big_buffer_size)
705 {
706 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
707 uschar *newbuffer = store_malloc(newsize);
708 memcpy(newbuffer, big_buffer, newlen + 1);
709 p = newbuffer + (p - big_buffer);
710 s = newbuffer + (s - big_buffer);
711 ss = newbuffer + (ss - big_buffer);
712 t = newbuffer + (t - big_buffer);
713 big_buffer_size = newsize;
714 store_free(big_buffer);
715 big_buffer = newbuffer;
716 }
717
718 /* Shuffle the remaining characters up or down in the buffer before
719 copying in the replacement text. Don't rescan the replacement for this
720 same macro. */
721
722 pp = p + namelen;
723 moveby = replen - namelen;
724 if (moveby != 0)
725 {
726 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
727 newlen += moveby;
728 }
729 Ustrncpy(p, m->replacement, replen);
730 t = p + replen;
731 macro_found = TRUE;
732 }
733 }
734
735 /* An empty macro replacement at the start of a line could mean that ss no
736 longer points to the first non-blank character. */
737
738 while (isspace(*ss)) ss++;
739
740 /* Check for comment lines - these are physical lines. */
741
742 if (*ss == '#') continue;
743
744 /* Handle conditionals, which are also applied to physical lines. Conditions
745 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
746 expansion occured on the rest of the line. A preliminary test for the leading
747 '.' saves effort on most lines. */
748
749 if (*ss == '.')
750 {
751 int i;
752
753 /* Search the list of conditional directives */
754
755 for (i = 0; i < cond_list_size; i++)
756 {
757 int n;
758 cond_item *c = cond_list+i;
759 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
760
761 /* The following character must be white space or end of string */
762
763 n = ss[1 + c->namelen];
764 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
765
766 /* .ifdef and .ifndef push the current state onto the stack, then set
767 a new one from the table. Stack overflow is an error */
768
769 if (c->pushpop > 0)
770 {
771 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
772 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
773 ".%s nested too deeply", c->name);
774 cstate_stack[++cstate_stack_ptr] = cstate;
775 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
776 }
777
778 /* For any of the others, stack underflow is an error. The next state
779 comes either from the stack (.endif) or from the table. */
780
781 else
782 {
783 if (cstate_stack_ptr < 0)
784 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
785 ".%s without matching .ifdef", c->name);
786 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
787 next_cstate[cstate][macro_found? c->action1 : c->action2];
788 }
789
790 /* Having dealt with a directive, break the loop */
791
792 break;
793 }
794
795 /* If we have handled a conditional directive, continue with the next
796 physical line. Otherwise, fall through. */
797
798 if (i < cond_list_size) continue;
799 }
800
801 /* If the conditional state is not 0 (actively using these lines), ignore
802 this input line. */
803
804 if (cstate != 0) continue; /* Conditional skip */
805
806 /* Handle .include lines - these are also physical lines. */
807
808 if (Ustrncmp(ss, ".include", 8) == 0 &&
809 (isspace(ss[8]) ||
810 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
811 {
812 uschar *t;
813 int include_if_exists = isspace(ss[8])? 0 : 10;
814 config_file_item *save;
815 struct stat statbuf;
816
817 ss += 9 + include_if_exists;
818 while (isspace(*ss)) ss++;
819 t = ss + Ustrlen(ss);
820 while (t > ss && isspace(t[-1])) t--;
821 if (*ss == '\"' && t[-1] == '\"')
822 {
823 ss++;
824 t--;
825 }
826 *t = 0;
827
828 if (*ss != '/')
829 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
830 "absolute path \"%s\"", ss);
831
832 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
833
834 save = store_get(sizeof(config_file_item));
835 save->next = config_file_stack;
836 config_file_stack = save;
837 save->file = config_file;
838 save->filename = config_filename;
839 save->lineno = config_lineno;
840
841 config_file = Ufopen(ss, "rb");
842 if (config_file == NULL)
843 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
844 "configuration file %s", ss);
845 config_filename = string_copy(ss);
846 config_lineno = 0;
847 continue;
848 }
849
850 /* If this is the start of the logical line, remember where the non-blank
851 data starts. Otherwise shuffle down continuation lines to remove leading
852 white space. */
853
854 if (len == 0)
855 startoffset = ss - big_buffer;
856 else
857 {
858 s = big_buffer + len;
859 if (ss > s)
860 {
861 memmove(s, ss, (newlen - len) - (ss - s) + 1);
862 newlen -= ss - s;
863 }
864 }
865
866 /* Accept the new addition to the line. Remove trailing white space. */
867
868 len = newlen;
869 while (len > 0 && isspace(big_buffer[len-1])) len--;
870 big_buffer[len] = 0;
871
872 /* We are done if the line does not end in backslash and contains some data.
873 Empty logical lines are ignored. For continuations, remove the backslash and
874 go round the loop to read the continuation line. */
875
876 if (len > 0)
877 {
878 if (big_buffer[len-1] != '\\') break; /* End of logical line */
879 big_buffer[--len] = 0; /* Remove backslash */
880 }
881 } /* Loop for reading multiple physical lines */
882
883 /* We now have a logical line. Test for the end of a configuration section (or,
884 more accurately, for the start of the next section). Place the name of the next
885 section in next_section, and return NULL. If the name given is longer than
886 next_section, truncate it. It will be unrecognized later, because all the known
887 section names do fit. Leave space for pluralizing. */
888
889 s = big_buffer + startoffset; /* First non-space character */
890 if (strncmpic(s, US"begin ", 6) == 0)
891 {
892 s += 6;
893 while (isspace(*s)) s++;
894 if (big_buffer + len - s > sizeof(next_section) - 2)
895 s[sizeof(next_section) - 2] = 0;
896 Ustrcpy(next_section, s);
897 return NULL;
898 }
899
900 /* Return the first non-blank character. */
901
902 return s;
903 }
904
905
906
907 /*************************************************
908 * Read a name *
909 *************************************************/
910
911 /* The yield is the pointer to the next uschar. Names longer than the
912 output space are silently truncated. This function is also used from acl.c when
913 parsing ACLs.
914
915 Arguments:
916 name where to put the name
917 len length of name
918 s input pointer
919
920 Returns: new input pointer
921 */
922
923 uschar *
924 readconf_readname(uschar *name, int len, uschar *s)
925 {
926 int p = 0;
927 while (isspace(*s)) s++;
928 if (isalpha(*s))
929 {
930 while (isalnum(*s) || *s == '_')
931 {
932 if (p < len-1) name[p++] = *s;
933 s++;
934 }
935 }
936 name[p] = 0;
937 while (isspace(*s)) s++;
938 return s;
939 }
940
941
942
943
944 /*************************************************
945 * Read a time value *
946 *************************************************/
947
948 /* This function is also called from outside, to read argument
949 time values. The format of a time value is:
950
951 [<n>w][<n>d][<n>h][<n>m][<n>s]
952
953 as long as at least one is present. If a format error is encountered,
954 return a negative value. The value must be terminated by the given
955 terminator.
956
957 Arguments:
958 s input pointer
959 terminator required terminating character
960 return_msec if TRUE, allow fractional seconds and return milliseconds
961
962 Returns: the time value, or -1 on syntax error
963 value is seconds if return_msec is FALSE
964 value is milliseconds if return_msec is TRUE
965 */
966
967 int
968 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
969 {
970 int yield = 0;
971 for (;;)
972 {
973 int value, count;
974 double fraction;
975
976 if (!isdigit(*s)) return -1;
977 (void)sscanf(CS s, "%d%n", &value, &count);
978 s += count;
979
980 switch (*s)
981 {
982 case 'w': value *= 7;
983 case 'd': value *= 24;
984 case 'h': value *= 60;
985 case 'm': value *= 60;
986 case 's': s++;
987 break;
988
989 case '.':
990 if (!return_msec) return -1;
991 (void)sscanf(CS s, "%lf%n", &fraction, &count);
992 s += count;
993 if (*s++ != 's') return -1;
994 yield += (int)(fraction * 1000.0);
995 break;
996
997 default: return -1;
998 }
999
1000 if (return_msec) value *= 1000;
1001 yield += value;
1002 if (*s == terminator) return yield;
1003 }
1004 /* Control never reaches here. */
1005 }
1006
1007
1008
1009 /*************************************************
1010 * Read a fixed point value *
1011 *************************************************/
1012
1013 /* The value is returned *1000
1014
1015 Arguments:
1016 s input pointer
1017 terminator required terminator
1018
1019 Returns: the value, or -1 on error
1020 */
1021
1022 static int
1023 readconf_readfixed(uschar *s, int terminator)
1024 {
1025 int yield = 0;
1026 int value, count;
1027 if (!isdigit(*s)) return -1;
1028 (void)sscanf(CS s, "%d%n", &value, &count);
1029 s += count;
1030 yield = value * 1000;
1031 if (*s == '.')
1032 {
1033 int m = 100;
1034 while (isdigit((*(++s))))
1035 {
1036 yield += (*s - '0') * m;
1037 m /= 10;
1038 }
1039 }
1040
1041 return (*s == terminator)? yield : (-1);
1042 }
1043
1044
1045
1046 /*************************************************
1047 * Find option in list *
1048 *************************************************/
1049
1050 /* The lists are always in order, so binary chop can be used.
1051
1052 Arguments:
1053 name the option name to search for
1054 ol the first entry in the option list
1055 last one more than the offset of the last entry in the option list
1056
1057 Returns: pointer to an option entry, or NULL if not found
1058 */
1059
1060 static optionlist *
1061 find_option(uschar *name, optionlist *ol, int last)
1062 {
1063 int first = 0;
1064 while (last > first)
1065 {
1066 int middle = (first + last)/2;
1067 int c = Ustrcmp(name, ol[middle].name);
1068 if (c == 0) return ol + middle;
1069 else if (c > 0) first = middle + 1;
1070 else last = middle;
1071 }
1072 return NULL;
1073 }
1074
1075
1076
1077 /*************************************************
1078 * Find a set flag in option list *
1079 *************************************************/
1080
1081 /* Because some versions of Unix make no restrictions on the values of uids and
1082 gids (even negative ones), we cannot represent "unset" by a special value.
1083 There is therefore a separate boolean variable for each one indicating whether
1084 a value is set or not. This function returns a pointer to the boolean, given
1085 the original option name. It is a major disaster if the flag cannot be found.
1086
1087 Arguments:
1088 name the name of the uid or gid option
1089 oltop points to the start of the relevant option list
1090 last one more than the offset of the last item in the option list
1091 data_block NULL when reading main options => data values in the option
1092 list are absolute addresses; otherwise they are byte offsets
1093 in data_block (used for driver options)
1094
1095 Returns: a pointer to the boolean flag.
1096 */
1097
1098 static BOOL *
1099 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1100 {
1101 optionlist *ol;
1102 uschar name2[64];
1103 sprintf(CS name2, "*set_%.50s", name);
1104 ol = find_option(name2, oltop, last);
1105 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1106 "Exim internal error: missing set flag for %s", name);
1107 return (data_block == NULL)? (BOOL *)(ol->value) :
1108 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1109 }
1110
1111
1112
1113
1114 /*************************************************
1115 * Output extra characters message and die *
1116 *************************************************/
1117
1118 /* Called when an option line has junk on the end. Sometimes this is because
1119 the sysadmin thinks comments are permitted.
1120
1121 Arguments:
1122 s points to the extra characters
1123 t1..t3 strings to insert in the log message
1124
1125 Returns: doesn't return; dies
1126 */
1127
1128 static void
1129 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1130 {
1131 uschar *comment = US"";
1132 if (*s == '#') comment = US" (# is comment only at line start)";
1133 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1134 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1135 }
1136
1137
1138
1139 /*************************************************
1140 * Read rewrite information *
1141 *************************************************/
1142
1143 /* Each line of rewrite information contains:
1144
1145 . A complete address in the form user@domain, possibly with
1146 leading * for each part; or alternatively, a regex.
1147
1148 . A replacement string (which will be expanded).
1149
1150 . An optional sequence of one-letter flags, indicating which
1151 headers etc. to apply this rule to.
1152
1153 All this is decoded and placed into a control block. The OR of the flags is
1154 maintained in a common word.
1155
1156 Arguments:
1157 p points to the string that makes up the rule
1158 existflags points to the overall flag word
1159 isglobal TRUE if reading global rewrite rules
1160
1161 Returns: the control block for the parsed rule.
1162 */
1163
1164 static rewrite_rule *
1165 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1166 {
1167 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1168
1169 next->next = NULL;
1170 next->key = string_dequote(&p);
1171
1172 while (isspace(*p)) p++;
1173 if (*p == 0)
1174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1175 "missing rewrite replacement string");
1176
1177 next->flags = 0;
1178 next->replacement = string_dequote(&p);
1179
1180 while (*p != 0) switch (*p++)
1181 {
1182 case ' ': case '\t': break;
1183
1184 case 'q': next->flags |= rewrite_quit; break;
1185 case 'w': next->flags |= rewrite_whole; break;
1186
1187 case 'h': next->flags |= rewrite_all_headers; break;
1188 case 's': next->flags |= rewrite_sender; break;
1189 case 'f': next->flags |= rewrite_from; break;
1190 case 't': next->flags |= rewrite_to; break;
1191 case 'c': next->flags |= rewrite_cc; break;
1192 case 'b': next->flags |= rewrite_bcc; break;
1193 case 'r': next->flags |= rewrite_replyto; break;
1194
1195 case 'E': next->flags |= rewrite_all_envelope; break;
1196 case 'F': next->flags |= rewrite_envfrom; break;
1197 case 'T': next->flags |= rewrite_envto; break;
1198
1199 case 'Q': next->flags |= rewrite_qualify; break;
1200 case 'R': next->flags |= rewrite_repeat; break;
1201
1202 case 'S':
1203 next->flags |= rewrite_smtp;
1204 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1205 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1206 "rewrite rule has the S flag but is not a regular expression");
1207 break;
1208
1209 default:
1210 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1211 "unknown rewrite flag character '%c' "
1212 "(could be missing quotes round replacement item)", p[-1]);
1213 break;
1214 }
1215
1216 /* If no action flags are set, set all the "normal" rewrites. */
1217
1218 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1219 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1220
1221 /* Remember which exist, for optimization, and return the rule */
1222
1223 *existflags |= next->flags;
1224 return next;
1225 }
1226
1227
1228
1229
1230 /*************************************************
1231 * Read global rewrite information *
1232 *************************************************/
1233
1234 /* Each line is a single rewrite rule; it is parsed into a control block
1235 by readconf_one_rewrite(), and its flags are ORed into the global flag
1236 word rewrite_existflags. */
1237
1238 void
1239 readconf_rewrites(void)
1240 {
1241 rewrite_rule **chain = &global_rewrite_rules;
1242 uschar *p;
1243
1244 while ((p = get_config_line()) != NULL)
1245 {
1246 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1247 *chain = next;
1248 chain = &(next->next);
1249 }
1250 }
1251
1252
1253
1254 /*************************************************
1255 * Read a string *
1256 *************************************************/
1257
1258 /* Strings are read into the normal store pool. As long we aren't too
1259 near the end of the current block, the string will just use what is necessary
1260 on the top of the stacking pool, because string_cat() uses the extension
1261 mechanism.
1262
1263 Argument:
1264 s the rest of the input line
1265 name the option name (for errors)
1266
1267 Returns: pointer to the string
1268 */
1269
1270 static uschar *
1271 read_string(uschar *s, uschar *name)
1272 {
1273 uschar *yield;
1274 uschar *ss;
1275
1276 if (*s != '\"') return string_copy(s);
1277
1278 ss = s;
1279 yield = string_dequote(&s);
1280
1281 if (s == ss+1 || s[-1] != '\"')
1282 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1283 "missing quote at end of string value for %s", name);
1284
1285 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1286
1287 return yield;
1288 }
1289
1290
1291 /*************************************************
1292 * Handle option line *
1293 *************************************************/
1294
1295 /* This function is called from several places to process a line containing the
1296 setting of an option. The first argument is the line to be decoded; it has been
1297 checked not to be empty and not to start with '#'. Trailing newlines and white
1298 space have been removed. The second argument is a pointer to the list of
1299 variable names that are to be recognized, together with their types and
1300 locations, and the third argument gives the number of entries in the list.
1301
1302 The fourth argument is a pointer to a data block. If it is NULL, then the data
1303 values in the options list are absolute addresses. Otherwise, they are byte
1304 offsets in the data block.
1305
1306 String option data may continue onto several lines; this function reads further
1307 data from config_file if necessary.
1308
1309 The yield of this function is normally zero. If a string continues onto
1310 multiple lines, then the data value is permitted to be followed by a comma
1311 or a semicolon (for use in drivers) and the yield is that character.
1312
1313 Arguments:
1314 buffer contains the configuration line to be handled
1315 oltop points to the start of the relevant option list
1316 last one more than the offset of the last item in the option list
1317 data_block NULL when reading main options => data values in the option
1318 list are absolute addresses; otherwise they are byte offsets
1319 in data_block when they have opt_public set; otherwise
1320 they are byte offsets in data_block->options_block.
1321 unknown_txt format string to use in panic message for unknown option;
1322 must contain %s for option name
1323 if given as NULL, don't panic on unknown option
1324
1325 Returns: TRUE if an option was read successfully,
1326 FALSE false for an unknown option if unknown_txt == NULL,
1327 otherwise panic and die on an unknown option
1328 */
1329
1330 static BOOL
1331 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1332 void *data_block, uschar *unknown_txt)
1333 {
1334 int ptr = 0;
1335 int offset = 0;
1336 int n, count, type, value;
1337 int issecure = 0;
1338 uid_t uid;
1339 gid_t gid;
1340 BOOL boolvalue = TRUE;
1341 BOOL freesptr = TRUE;
1342 optionlist *ol, *ol2;
1343 struct passwd *pw;
1344 void *reset_point;
1345 int intbase = 0;
1346 uschar *inttype = US"";
1347 uschar *sptr;
1348 uschar *s = buffer;
1349 uschar name[64];
1350 uschar name2[64];
1351
1352 /* There may be leading spaces; thereafter, we expect an option name starting
1353 with a letter. */
1354
1355 while (isspace(*s)) s++;
1356 if (!isalpha(*s))
1357 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1358
1359 /* Read the name of the option, and skip any subsequent white space. If
1360 it turns out that what we read was "hide", set the flag indicating that
1361 this is a secure option, and loop to read the next word. */
1362
1363 for (n = 0; n < 2; n++)
1364 {
1365 while (isalnum(*s) || *s == '_')
1366 {
1367 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1368 s++;
1369 }
1370 name[ptr] = 0;
1371 while (isspace(*s)) s++;
1372 if (Ustrcmp(name, "hide") != 0) break;
1373 issecure = opt_secure;
1374 ptr = 0;
1375 }
1376
1377 /* Deal with "no_" or "not_" here for booleans */
1378
1379 if (Ustrncmp(name, "no_", 3) == 0)
1380 {
1381 boolvalue = FALSE;
1382 offset = 3;
1383 }
1384
1385 if (Ustrncmp(name, "not_", 4) == 0)
1386 {
1387 boolvalue = FALSE;
1388 offset = 4;
1389 }
1390
1391 /* Search the list for the given name. A non-existent name, or an option that
1392 is set twice, is a disaster. */
1393
1394 ol = find_option(name + offset, oltop, last);
1395
1396 if (ol == NULL)
1397 {
1398 if (unknown_txt == NULL) return FALSE;
1399 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1400 }
1401
1402 if ((ol->type & opt_set) != 0)
1403 {
1404 uschar *mname = name;
1405 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1406 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1407 "\"%s\" option set for the second time", mname);
1408 }
1409
1410 ol->type |= opt_set | issecure;
1411 type = ol->type & opt_mask;
1412
1413 /* Types with data values must be followed by '='; the "no[t]_" prefix
1414 applies only to boolean values. */
1415
1416 if (type < opt_bool || type > opt_bool_last)
1417 {
1418 if (offset != 0)
1419 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1420 "negation prefix applied to a non-boolean option");
1421 if (*s == 0)
1422 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1423 "unexpected end of line (data missing) after %s", name);
1424 if (*s != '=')
1425 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1426 }
1427
1428 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1429 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1430 ultimately expands to one of those values. */
1431
1432 else if (*s != 0 && (offset != 0 || *s != '='))
1433 extra_chars_error(s, US"boolean option ", name, US"");
1434
1435 /* Skip white space after = */
1436
1437 if (*s == '=') while (isspace((*(++s))));
1438
1439 /* If there is a data block and the opt_public flag is not set, change
1440 the data block pointer to the private options block. */
1441
1442 if (data_block != NULL && (ol->type & opt_public) == 0)
1443 data_block = (void *)(((driver_instance *)data_block)->options_block);
1444
1445 /* Now get the data according to the type. */
1446
1447 switch (type)
1448 {
1449 /* If a string value is not enclosed in quotes, it consists of
1450 the rest of the current line, verbatim. Otherwise, string escapes
1451 are processed.
1452
1453 A transport is specified as a string, which is then looked up in the
1454 list of transports. A search type is specified as one of a number of
1455 known strings.
1456
1457 A set or rewrite rules for a driver is specified as a string, which is
1458 then parsed into a suitable chain of control blocks.
1459
1460 Uids and gids are specified as strings which are then looked up in the
1461 passwd file. Lists of uids and gids are similarly specified as colon-
1462 separated strings. */
1463
1464 case opt_stringptr:
1465 case opt_uid:
1466 case opt_gid:
1467 case opt_expand_uid:
1468 case opt_expand_gid:
1469 case opt_uidlist:
1470 case opt_gidlist:
1471 case opt_rewrite:
1472
1473 reset_point = sptr = read_string(s, name);
1474
1475 /* Having read a string, we now have several different ways of using it,
1476 depending on the data type, so do another switch. If keeping the actual
1477 string is not required (because it is interpreted), freesptr is set TRUE,
1478 and at the end we reset the pool. */
1479
1480 switch (type)
1481 {
1482 /* If this was a string, set the variable to point to the new string,
1483 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1484 rules, we still keep the string (for printing), and parse the rules into a
1485 control block and flags word. */
1486
1487 case opt_stringptr:
1488 case opt_rewrite:
1489 if (data_block == NULL)
1490 *((uschar **)(ol->value)) = sptr;
1491 else
1492 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1493 freesptr = FALSE;
1494 if (type == opt_rewrite)
1495 {
1496 int sep = 0;
1497 int *flagptr;
1498 uschar *p = sptr;
1499 rewrite_rule **chain;
1500 optionlist *ol3;
1501
1502 sprintf(CS name2, "*%.50s_rules", name);
1503 ol2 = find_option(name2, oltop, last);
1504 sprintf(CS name2, "*%.50s_flags", name);
1505 ol3 = find_option(name2, oltop, last);
1506
1507 if (ol2 == NULL || ol3 == NULL)
1508 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1509 "rewrite rules not available for driver");
1510
1511 if (data_block == NULL)
1512 {
1513 chain = (rewrite_rule **)(ol2->value);
1514 flagptr = (int *)(ol3->value);
1515 }
1516 else
1517 {
1518 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1519 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1520 }
1521
1522 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1523 != NULL)
1524 {
1525 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1526 *chain = next;
1527 chain = &(next->next);
1528 }
1529
1530 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1531 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1532 "non-header rewrite - not allowed at transport time -");
1533 }
1534 break;
1535
1536 /* If it was an expanded uid, see if there is any expansion to be
1537 done by checking for the presence of a $ character. If there is, save it
1538 in the corresponding *expand_user option field. Otherwise, fall through
1539 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1540 of data. */
1541
1542 case opt_expand_uid:
1543 sprintf(CS name2, "*expand_%.50s", name);
1544 ol2 = find_option(name2, oltop, last);
1545 if (ol2 != NULL)
1546 {
1547 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1548
1549 if (data_block == NULL)
1550 *((uschar **)(ol2->value)) = ss;
1551 else
1552 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1553
1554 if (ss != NULL)
1555 {
1556 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1557 freesptr = FALSE;
1558 break;
1559 }
1560 }
1561
1562 /* Look up a fixed uid, and also make use of the corresponding gid
1563 if a passwd entry is returned and the gid has not been set. */
1564
1565 case opt_uid:
1566 if (!route_finduser(sptr, &pw, &uid))
1567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1568 if (data_block == NULL)
1569 *((uid_t *)(ol->value)) = uid;
1570 else
1571 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1572
1573 /* Set the flag indicating a fixed value is set */
1574
1575 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1576
1577 /* Handle matching gid if we have a passwd entry: done by finding the
1578 same name with terminating "user" changed to "group"; if not found,
1579 ignore. Also ignore if the value is already set. */
1580
1581 if (pw == NULL) break;
1582 Ustrcpy(name+Ustrlen(name)-4, "group");
1583 ol2 = find_option(name, oltop, last);
1584 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1585 (ol2->type & opt_mask) == opt_expand_gid))
1586 {
1587 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1588 if (! *set_flag)
1589 {
1590 if (data_block == NULL)
1591 *((gid_t *)(ol2->value)) = pw->pw_gid;
1592 else
1593 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1594 *set_flag = TRUE;
1595 }
1596 }
1597 break;
1598
1599 /* If it was an expanded gid, see if there is any expansion to be
1600 done by checking for the presence of a $ character. If there is, save it
1601 in the corresponding *expand_user option field. Otherwise, fall through
1602 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1603 of data. */
1604
1605 case opt_expand_gid:
1606 sprintf(CS name2, "*expand_%.50s", name);
1607 ol2 = find_option(name2, oltop, last);
1608 if (ol2 != NULL)
1609 {
1610 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1611
1612 if (data_block == NULL)
1613 *((uschar **)(ol2->value)) = ss;
1614 else
1615 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1616
1617 if (ss != NULL)
1618 {
1619 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1620 freesptr = FALSE;
1621 break;
1622 }
1623 }
1624
1625 /* Handle freestanding gid */
1626
1627 case opt_gid:
1628 if (!route_findgroup(sptr, &gid))
1629 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1630 if (data_block == NULL)
1631 *((gid_t *)(ol->value)) = gid;
1632 else
1633 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1634 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1635 break;
1636
1637 /* If it was a uid list, look up each individual entry, and build
1638 a vector of uids, with a count in the first element. Put the vector
1639 in malloc store so we can free the string. (We are reading into
1640 permanent store already.) */
1641
1642 case opt_uidlist:
1643 {
1644 int count = 1;
1645 uid_t *list;
1646 int ptr = 0;
1647 uschar *p;
1648 uschar *op = expand_string (sptr);
1649
1650 if (op == NULL)
1651 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1652 name, expand_string_message);
1653
1654 p = op;
1655 if (*p != 0) count++;
1656 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1657 list = store_malloc(count*sizeof(uid_t));
1658 list[ptr++] = (uid_t)(count - 1);
1659
1660 if (data_block == NULL)
1661 *((uid_t **)(ol->value)) = list;
1662 else
1663 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1664
1665 p = op;
1666 while (count-- > 1)
1667 {
1668 int sep = 0;
1669 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1670 if (!route_finduser(big_buffer, NULL, &uid))
1671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1672 big_buffer);
1673 list[ptr++] = uid;
1674 }
1675 }
1676 break;
1677
1678 /* If it was a gid list, look up each individual entry, and build
1679 a vector of gids, with a count in the first element. Put the vector
1680 in malloc store so we can free the string. (We are reading into permanent
1681 store already.) */
1682
1683 case opt_gidlist:
1684 {
1685 int count = 1;
1686 gid_t *list;
1687 int ptr = 0;
1688 uschar *p;
1689 uschar *op = expand_string (sptr);
1690
1691 if (op == NULL)
1692 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1693 name, expand_string_message);
1694
1695 p = op;
1696 if (*p != 0) count++;
1697 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1698 list = store_malloc(count*sizeof(gid_t));
1699 list[ptr++] = (gid_t)(count - 1);
1700
1701 if (data_block == NULL)
1702 *((gid_t **)(ol->value)) = list;
1703 else
1704 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1705
1706 p = op;
1707 while (count-- > 1)
1708 {
1709 int sep = 0;
1710 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1711 if (!route_findgroup(big_buffer, &gid))
1712 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1713 big_buffer);
1714 list[ptr++] = gid;
1715 }
1716 }
1717 break;
1718 }
1719
1720 /* Release store if the value of the string doesn't need to be kept. */
1721
1722 if (freesptr) store_reset(reset_point);
1723 break;
1724
1725 /* Expanded boolean: if no characters follow, or if there are no dollar
1726 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1727 save the string for later expansion in the alternate place. */
1728
1729 case opt_expand_bool:
1730 if (*s != 0 && Ustrchr(s, '$') != 0)
1731 {
1732 sprintf(CS name2, "*expand_%.50s", name);
1733 ol2 = find_option(name2, oltop, last);
1734 if (ol2 != NULL)
1735 {
1736 reset_point = sptr = read_string(s, name);
1737 if (data_block == NULL)
1738 *((uschar **)(ol2->value)) = sptr;
1739 else
1740 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1741 freesptr = FALSE;
1742 break;
1743 }
1744 }
1745 /* Fall through */
1746
1747 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1748 look for yes/not/true/false. Some booleans are stored in a single bit in
1749 a single int. There's a special fudge for verify settings; without a suffix
1750 they set both xx_sender and xx_recipient. The table points to the sender
1751 value; search subsequently for the recipient. There's another special case:
1752 opt_bool_set also notes when a boolean has been set. */
1753
1754 case opt_bool:
1755 case opt_bit:
1756 case opt_bool_verify:
1757 case opt_bool_set:
1758 if (*s != 0)
1759 {
1760 s = readconf_readname(name2, 64, s);
1761 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1762 boolvalue = TRUE;
1763 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1764 boolvalue = FALSE;
1765 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1766 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1767 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1768 US"for boolean option ", name);
1769 }
1770
1771 /* Handle single-bit type. */
1772
1773 if (type == opt_bit)
1774 {
1775 int bit = 1 << ((ol->type >> 16) & 31);
1776 int *ptr = (data_block == NULL)?
1777 (int *)(ol->value) :
1778 (int *)((uschar *)data_block + (long int)ol->value);
1779 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1780 break;
1781 }
1782
1783 /* Handle full BOOL types */
1784
1785 if (data_block == NULL)
1786 *((BOOL *)(ol->value)) = boolvalue;
1787 else
1788 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1789
1790 /* Verify fudge */
1791
1792 if (type == opt_bool_verify)
1793 {
1794 sprintf(CS name2, "%.50s_recipient", name + offset);
1795 ol2 = find_option(name2, oltop, last);
1796 if (ol2 != NULL)
1797 {
1798 if (data_block == NULL)
1799 *((BOOL *)(ol2->value)) = boolvalue;
1800 else
1801 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1802 }
1803 }
1804
1805 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1806
1807 else if (type == opt_bool_set)
1808 {
1809 sprintf(CS name2, "*set_%.50s", name + offset);
1810 ol2 = find_option(name2, oltop, last);
1811 if (ol2 != NULL)
1812 {
1813 if (data_block == NULL)
1814 *((BOOL *)(ol2->value)) = TRUE;
1815 else
1816 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1817 }
1818 }
1819 break;
1820
1821 /* Octal integer */
1822
1823 case opt_octint:
1824 intbase = 8;
1825 inttype = US"octal ";
1826
1827 /* Integer: a simple(ish) case; allow octal and hex formats, and
1828 suffixes K and M. The different types affect output, not input. */
1829
1830 case opt_mkint:
1831 case opt_int:
1832 {
1833 uschar *endptr;
1834 long int lvalue;
1835
1836 errno = 0;
1837 lvalue = strtol(CS s, CSS &endptr, intbase);
1838
1839 if (endptr == s)
1840 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1841 inttype, name);
1842
1843 if (errno != ERANGE)
1844 {
1845 if (tolower(*endptr) == 'k')
1846 {
1847 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1848 else lvalue *= 1024;
1849 endptr++;
1850 }
1851 else if (tolower(*endptr) == 'm')
1852 {
1853 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1854 errno = ERANGE;
1855 else lvalue *= 1024*1024;
1856 endptr++;
1857 }
1858 }
1859
1860 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1861 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1862 "absolute value of integer \"%s\" is too large (overflow)", s);
1863
1864 while (isspace(*endptr)) endptr++;
1865 if (*endptr != 0)
1866 extra_chars_error(endptr, inttype, US"integer value for ", name);
1867
1868 value = (int)lvalue;
1869 }
1870
1871 if (data_block == NULL)
1872 *((int *)(ol->value)) = value;
1873 else
1874 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1875 break;
1876
1877 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1878 M. */
1879
1880 case opt_Kint:
1881 {
1882 uschar *endptr;
1883 errno = 0;
1884 value = strtol(CS s, CSS &endptr, intbase);
1885
1886 if (endptr == s)
1887 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1888 inttype, name);
1889
1890 if (errno != ERANGE)
1891 {
1892 if (tolower(*endptr) == 'm')
1893 {
1894 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1895 else value *= 1024;
1896 endptr++;
1897 }
1898 else if (tolower(*endptr) == 'k')
1899 {
1900 endptr++;
1901 }
1902 else
1903 {
1904 value = (value + 512)/1024;
1905 }
1906 }
1907
1908 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1909 "absolute value of integer \"%s\" is too large (overflow)", s);
1910
1911 while (isspace(*endptr)) endptr++;
1912 if (*endptr != 0)
1913 extra_chars_error(endptr, inttype, US"integer value for ", name);
1914 }
1915
1916 if (data_block == NULL)
1917 *((int *)(ol->value)) = value;
1918 else
1919 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1920 break;
1921
1922 /* Fixed-point number: held to 3 decimal places. */
1923
1924 case opt_fixed:
1925 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1926 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1927 "fixed-point number expected for %s", name);
1928
1929 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1930 "integer \"%s\" is too large (overflow)", s);
1931
1932 value *= 1000;
1933
1934 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1935 "integer \"%s\" is too large (overflow)", s);
1936
1937 if (s[count] == '.')
1938 {
1939 int d = 100;
1940 while (isdigit(s[++count]))
1941 {
1942 value += (s[count] - '0') * d;
1943 d /= 10;
1944 }
1945 }
1946
1947 while (isspace(s[count])) count++;
1948
1949 if (s[count] != 0)
1950 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1951
1952 if (data_block == NULL)
1953 *((int *)(ol->value)) = value;
1954 else
1955 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1956 break;
1957
1958 /* There's a special routine to read time values. */
1959
1960 case opt_time:
1961 value = readconf_readtime(s, 0, FALSE);
1962 if (value < 0)
1963 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1964 name);
1965 if (data_block == NULL)
1966 *((int *)(ol->value)) = value;
1967 else
1968 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1969 break;
1970
1971 /* A time list is a list of colon-separated times, with the first
1972 element holding the size of the list and the second the number of
1973 entries used. */
1974
1975 case opt_timelist:
1976 {
1977 int count = 0;
1978 int *list = (data_block == NULL)?
1979 (int *)(ol->value) :
1980 (int *)((uschar *)data_block + (long int)(ol->value));
1981
1982 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1983 {
1984 int terminator = 0;
1985 uschar *snext = Ustrchr(s, ':');
1986 if (snext != NULL)
1987 {
1988 uschar *ss = snext;
1989 while (ss > s && isspace(ss[-1])) ss--;
1990 terminator = *ss;
1991 }
1992 value = readconf_readtime(s, terminator, FALSE);
1993 if (value < 0)
1994 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1995 name);
1996 if (count > 1 && value <= list[count])
1997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1998 "time value out of order for %s", name);
1999 list[count+1] = value;
2000 if (snext == NULL) break;
2001 s = snext + 1;
2002 while (isspace(*s)) s++;
2003 }
2004
2005 if (count > list[0] - 2)
2006 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2007 name);
2008 if (count > 0 && list[2] == 0) count = 0;
2009 list[1] = count;
2010 }
2011
2012 break;
2013 }
2014
2015 return TRUE;
2016 }
2017
2018
2019
2020 /*************************************************
2021 * Print a time value *
2022 *************************************************/
2023
2024 /*
2025 Argument: a time value in seconds
2026 Returns: pointer to a fixed buffer containing the time as a string,
2027 in readconf_readtime() format
2028 */
2029
2030 uschar *
2031 readconf_printtime(int t)
2032 {
2033 int s, m, h, d, w;
2034 uschar *p = time_buffer;
2035
2036 if (t < 0)
2037 {
2038 *p++ = '-';
2039 t = -t;
2040 }
2041
2042 s = t % 60;
2043 t /= 60;
2044 m = t % 60;
2045 t /= 60;
2046 h = t % 24;
2047 t /= 24;
2048 d = t % 7;
2049 w = t/7;
2050
2051 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2052 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2053 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2054 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2055 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2056
2057 return time_buffer;
2058 }
2059
2060
2061
2062 /*************************************************
2063 * Print an individual option value *
2064 *************************************************/
2065
2066 /* This is used by the -bP option, so prints to the standard output.
2067 The entire options list is passed in as an argument, because some options come
2068 in pairs - typically uid/gid settings, which can either be explicit numerical
2069 values, or strings to be expanded later. If the numerical value is unset,
2070 search for "*expand_<name>" to see if there is a string equivalent.
2071
2072 Arguments:
2073 ol option entry, or NULL for an unknown option
2074 name option name
2075 options_block NULL for main configuration options; otherwise points to
2076 a driver block; if the option doesn't have opt_public
2077 set, then options_block->options_block is where the item
2078 resides.
2079 oltop points to the option list in which ol exists
2080 last one more than the offset of the last entry in optop
2081
2082 Returns: nothing
2083 */
2084
2085 static void
2086 print_ol(optionlist *ol, uschar *name, void *options_block,
2087 optionlist *oltop, int last)
2088 {
2089 struct passwd *pw;
2090 struct group *gr;
2091 optionlist *ol2;
2092 void *value;
2093 uid_t *uidlist;
2094 gid_t *gidlist;
2095 uschar *s;
2096 uschar name2[64];
2097
2098 if (ol == NULL)
2099 {
2100 printf("%s is not a known option\n", name);
2101 return;
2102 }
2103
2104 /* Non-admin callers cannot see options that have been flagged secure by the
2105 "hide" prefix. */
2106
2107 if (!admin_user && (ol->type & opt_secure) != 0)
2108 {
2109 printf("%s = <value not displayable>\n", name);
2110 return;
2111 }
2112
2113 /* Else show the value of the option */
2114
2115 value = ol->value;
2116 if (options_block != NULL)
2117 {
2118 if ((ol->type & opt_public) == 0)
2119 options_block = (void *)(((driver_instance *)options_block)->options_block);
2120 value = (void *)((uschar *)options_block + (long int)value);
2121 }
2122
2123 switch(ol->type & opt_mask)
2124 {
2125 case opt_stringptr:
2126 case opt_rewrite: /* Show the text value */
2127 s = *((uschar **)value);
2128 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2129 break;
2130
2131 case opt_int:
2132 printf("%s = %d\n", name, *((int *)value));
2133 break;
2134
2135 case opt_mkint:
2136 {
2137 int x = *((int *)value);
2138 if (x != 0 && (x & 1023) == 0)
2139 {
2140 int c = 'K';
2141 x >>= 10;
2142 if ((x & 1023) == 0)
2143 {
2144 c = 'M';
2145 x >>= 10;
2146 }
2147 printf("%s = %d%c\n", name, x, c);
2148 }
2149 else printf("%s = %d\n", name, x);
2150 }
2151 break;
2152
2153 case opt_Kint:
2154 {
2155 int x = *((int *)value);
2156 if (x == 0) printf("%s = 0\n", name);
2157 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2158 else printf("%s = %dK\n", name, x);
2159 }
2160 break;
2161
2162 case opt_octint:
2163 printf("%s = %#o\n", name, *((int *)value));
2164 break;
2165
2166 /* Can be negative only when "unset", in which case integer */
2167
2168 case opt_fixed:
2169 {
2170 int x = *((int *)value);
2171 int f = x % 1000;
2172 int d = 100;
2173 if (x < 0) printf("%s =\n", name); else
2174 {
2175 printf("%s = %d.", name, x/1000);
2176 do
2177 {
2178 printf("%d", f/d);
2179 f %= d;
2180 d /= 10;
2181 }
2182 while (f != 0);
2183 printf("\n");
2184 }
2185 }
2186 break;
2187
2188 /* If the numerical value is unset, try for the string value */
2189
2190 case opt_expand_uid:
2191 if (! *get_set_flag(name, oltop, last, options_block))
2192 {
2193 sprintf(CS name2, "*expand_%.50s", name);
2194 ol2 = find_option(name2, oltop, last);
2195 if (ol2 != NULL)
2196 {
2197 void *value2 = ol2->value;
2198 if (options_block != NULL)
2199 value2 = (void *)((uschar *)options_block + (long int)value2);
2200 s = *((uschar **)value2);
2201 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2202 break;
2203 }
2204 }
2205
2206 /* Else fall through */
2207
2208 case opt_uid:
2209 if (! *get_set_flag(name, oltop, last, options_block))
2210 printf("%s =\n", name);
2211 else
2212 {
2213 pw = getpwuid(*((uid_t *)value));
2214 if (pw == NULL)
2215 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2216 else printf("%s = %s\n", name, pw->pw_name);
2217 }
2218 break;
2219
2220 /* If the numerical value is unset, try for the string value */
2221
2222 case opt_expand_gid:
2223 if (! *get_set_flag(name, oltop, last, options_block))
2224 {
2225 sprintf(CS name2, "*expand_%.50s", name);
2226 ol2 = find_option(name2, oltop, last);
2227 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2228 {
2229 void *value2 = ol2->value;
2230 if (options_block != NULL)
2231 value2 = (void *)((uschar *)options_block + (long int)value2);
2232 s = *((uschar **)value2);
2233 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2234 break;
2235 }
2236 }
2237
2238 /* Else fall through */
2239
2240 case opt_gid:
2241 if (! *get_set_flag(name, oltop, last, options_block))
2242 printf("%s =\n", name);
2243 else
2244 {
2245 gr = getgrgid(*((int *)value));
2246 if (gr == NULL)
2247 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2248 else printf("%s = %s\n", name, gr->gr_name);
2249 }
2250 break;
2251
2252 case opt_uidlist:
2253 uidlist = *((uid_t **)value);
2254 printf("%s =", name);
2255 if (uidlist != NULL)
2256 {
2257 int i;
2258 uschar sep = ' ';
2259 for (i = 1; i <= (int)(uidlist[0]); i++)
2260 {
2261 uschar *name = NULL;
2262 pw = getpwuid(uidlist[i]);
2263 if (pw != NULL) name = US pw->pw_name;
2264 if (name != NULL) printf("%c%s", sep, name);
2265 else printf("%c%ld", sep, (long int)(uidlist[i]));
2266 sep = ':';
2267 }
2268 }
2269 printf("\n");
2270 break;
2271
2272 case opt_gidlist:
2273 gidlist = *((gid_t **)value);
2274 printf("%s =", name);
2275 if (gidlist != NULL)
2276 {
2277 int i;
2278 uschar sep = ' ';
2279 for (i = 1; i <= (int)(gidlist[0]); i++)
2280 {
2281 uschar *name = NULL;
2282 gr = getgrgid(gidlist[i]);
2283 if (gr != NULL) name = US gr->gr_name;
2284 if (name != NULL) printf("%c%s", sep, name);
2285 else printf("%c%ld", sep, (long int)(gidlist[i]));
2286 sep = ':';
2287 }
2288 }
2289 printf("\n");
2290 break;
2291
2292 case opt_time:
2293 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2294 break;
2295
2296 case opt_timelist:
2297 {
2298 int i;
2299 int *list = (int *)value;
2300 printf("%s = ", name);
2301 for (i = 0; i < list[1]; i++)
2302 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2303 printf("\n");
2304 }
2305 break;
2306
2307 case opt_bit:
2308 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2309 "" : "no_", name);
2310 break;
2311
2312 case opt_expand_bool:
2313 sprintf(CS name2, "*expand_%.50s", name);
2314 ol2 = find_option(name2, oltop, last);
2315 if (ol2 != NULL && ol2->value != NULL)
2316 {
2317 void *value2 = ol2->value;
2318 if (options_block != NULL)
2319 value2 = (void *)((uschar *)options_block + (long int)value2);
2320 s = *((uschar **)value2);
2321 if (s != NULL)
2322 {
2323 printf("%s = %s\n", name, string_printing(s));
2324 break;
2325 }
2326 /* s == NULL => string not set; fall through */
2327 }
2328
2329 /* Fall through */
2330
2331 case opt_bool:
2332 case opt_bool_verify:
2333 case opt_bool_set:
2334 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2335 break;
2336 }
2337 }
2338
2339
2340
2341 /*************************************************
2342 * Print value from main configuration *
2343 *************************************************/
2344
2345 /* This function, called as a result of encountering the -bP option,
2346 causes the value of any main configuration variable to be output if the
2347 second argument is NULL. There are some special values:
2348
2349 all print all main configuration options
2350 configure_file print the name of the configuration file
2351 routers print the routers' configurations
2352 transports print the transports' configuration
2353 authenticators print the authenticators' configuration
2354 router_list print a list of router names
2355 transport_list print a list of transport names
2356 authenticator_list print a list of authentication mechanism names
2357 +name print a named list item
2358 local_scan print the local_scan options
2359
2360 If the second argument is not NULL, it must be one of "router", "transport", or
2361 "authenticator" in which case the first argument identifies the driver whose
2362 options are to be printed.
2363
2364 Arguments:
2365 name option name if type == NULL; else driver name
2366 type NULL or driver type name, as described above
2367
2368 Returns: nothing
2369 */
2370
2371 void
2372 readconf_print(uschar *name, uschar *type)
2373 {
2374 BOOL names_only = FALSE;
2375 optionlist *ol;
2376 optionlist *ol2 = NULL;
2377 driver_instance *d = NULL;
2378 int size = 0;
2379
2380 if (type == NULL)
2381 {
2382 if (*name == '+')
2383 {
2384 int i;
2385 tree_node *t;
2386 BOOL found = FALSE;
2387 static uschar *types[] = { US"address", US"domain", US"host",
2388 US"localpart" };
2389 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2390 &hostlist_anchor, &localpartlist_anchor };
2391
2392 for (i = 0; i < 4; i++)
2393 {
2394 t = tree_search(*(anchors[i]), name+1);
2395 if (t != NULL)
2396 {
2397 found = TRUE;
2398 printf("%slist %s = %s\n", types[i], name+1,
2399 ((namedlist_block *)(t->data.ptr))->string);
2400 }
2401 }
2402
2403 if (!found)
2404 printf("no address, domain, host, or local part list called \"%s\" "
2405 "exists\n", name+1);
2406
2407 return;
2408 }
2409
2410 if (Ustrcmp(name, "configure_file") == 0)
2411 {
2412 printf("%s\n", CS config_main_filename);
2413 return;
2414 }
2415
2416 if (Ustrcmp(name, "all") == 0)
2417 {
2418 for (ol = optionlist_config;
2419 ol < optionlist_config + optionlist_config_size; ol++)
2420 {
2421 if ((ol->type & opt_hidden) == 0)
2422 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2423 }
2424 return;
2425 }
2426
2427 if (Ustrcmp(name, "local_scan") == 0)
2428 {
2429 #ifndef LOCAL_SCAN_HAS_OPTIONS
2430 printf("local_scan() options are not supported\n");
2431 #else
2432 for (ol = local_scan_options;
2433 ol < local_scan_options + local_scan_options_count; ol++)
2434 {
2435 print_ol(ol, US ol->name, NULL, local_scan_options,
2436 local_scan_options_count);
2437 }
2438 #endif
2439 return;
2440 }
2441
2442 if (Ustrcmp(name, "routers") == 0)
2443 {
2444 type = US"router";
2445 name = NULL;
2446 }
2447 else if (Ustrcmp(name, "transports") == 0)
2448 {
2449 type = US"transport";
2450 name = NULL;
2451 }
2452
2453 else if (Ustrcmp(name, "authenticators") == 0)
2454 {
2455 type = US"authenticator";
2456 name = NULL;
2457 }
2458
2459 else if (Ustrcmp(name, "authenticator_list") == 0)
2460 {
2461 type = US"authenticator";
2462 name = NULL;
2463 names_only = TRUE;
2464 }
2465
2466 else if (Ustrcmp(name, "router_list") == 0)
2467 {
2468 type = US"router";
2469 name = NULL;
2470 names_only = TRUE;
2471 }
2472 else if (Ustrcmp(name, "transport_list") == 0)
2473 {
2474 type = US"transport";
2475 name = NULL;
2476 names_only = TRUE;
2477 }
2478 else
2479 {
2480 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2481 name, NULL, optionlist_config, optionlist_config_size);
2482 return;
2483 }
2484 }
2485
2486 /* Handle the options for a router or transport. Skip options that are flagged
2487 as hidden. Some of these are options with names starting with '*', used for
2488 internal alternative representations of other options (which the printing
2489 function will sort out). Others are synonyms kept for backward compatibility.
2490 */
2491
2492 if (Ustrcmp(type, "router") == 0)
2493 {
2494 d = (driver_instance *)routers;
2495 ol2 = optionlist_routers;
2496 size = optionlist_routers_size;
2497 }
2498 else if (Ustrcmp(type, "transport") == 0)
2499 {
2500 d = (driver_instance *)transports;
2501 ol2 = optionlist_transports;
2502 size = optionlist_transports_size;
2503 }
2504 else if (Ustrcmp(type, "authenticator") == 0)
2505 {
2506 d = (driver_instance *)auths;
2507 ol2 = optionlist_auths;
2508 size = optionlist_auths_size;
2509 }
2510
2511 if (names_only)
2512 {
2513 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2514 return;
2515 }
2516
2517 /* Either search for a given driver, or print all of them */
2518
2519 for (; d != NULL; d = d->next)
2520 {
2521 if (name == NULL)
2522 printf("\n%s %s:\n", d->name, type);
2523 else if (Ustrcmp(d->name, name) != 0) continue;
2524
2525 for (ol = ol2; ol < ol2 + size; ol++)
2526 {
2527 if ((ol->type & opt_hidden) == 0)
2528 print_ol(ol, US ol->name, d, ol2, size);
2529 }
2530
2531 for (ol = d->info->options;
2532 ol < d->info->options + *(d->info->options_count); ol++)
2533 {
2534 if ((ol->type & opt_hidden) == 0)
2535 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2536 }
2537 if (name != NULL) return;
2538 }
2539 if (name != NULL) printf("%s %s not found\n", type, name);
2540 }
2541
2542
2543
2544 /*************************************************
2545 * Read a named list item *
2546 *************************************************/
2547
2548 /* This function reads a name and a list (i.e. string). The name is used to
2549 save the list in a tree, sorted by its name. Each entry also has a number,
2550 which can be used for caching tests, but if the string contains any expansion
2551 items other than $key, the number is set negative to inhibit caching. This
2552 mechanism is used for domain, host, and address lists that are referenced by
2553 the "+name" syntax.
2554
2555 Arguments:
2556 anchorp points to the tree anchor
2557 numberp points to the current number for this tree
2558 max the maximum number permitted
2559 s the text of the option line, starting immediately after the name
2560 of the list type
2561 tname the name of the list type, for messages
2562
2563 Returns: nothing
2564 */
2565
2566 static void
2567 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2568 uschar *tname)
2569 {
2570 BOOL forcecache = FALSE;
2571 uschar *ss;
2572 tree_node *t;
2573 namedlist_block *nb = store_get(sizeof(namedlist_block));
2574
2575 if (Ustrncmp(s, "_cache", 6) == 0)
2576 {
2577 forcecache = TRUE;
2578 s += 6;
2579 }
2580
2581 if (!isspace(*s))
2582 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2583
2584 if (*numberp >= max)
2585 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2586 tname, max);
2587
2588 while (isspace(*s)) s++;
2589 ss = s;
2590 while (isalnum(*s) || *s == '_') s++;
2591 t = store_get(sizeof(tree_node) + s-ss);
2592 Ustrncpy(t->name, ss, s-ss);
2593 t->name[s-ss] = 0;
2594 while (isspace(*s)) s++;
2595
2596 if (!tree_insertnode(anchorp, t))
2597 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2598 "duplicate name \"%s\" for a named %s", t->name, tname);
2599
2600 t->data.ptr = nb;
2601 nb->number = *numberp;
2602 *numberp += 1;
2603
2604 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2605 "missing '=' after \"%s\"", t->name);
2606 while (isspace(*s)) s++;
2607 nb->string = read_string(s, t->name);
2608 nb->cache_data = NULL;
2609
2610 /* Check the string for any expansions; if any are found, mark this list
2611 uncacheable unless the user has explicited forced caching. */
2612
2613 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2614 }
2615
2616
2617
2618
2619 /*************************************************
2620 * Unpick data for a rate limit *
2621 *************************************************/
2622
2623 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2624 separate values.
2625
2626 Arguments:
2627 s string, in the form t,b,f,l
2628 where t is the threshold (integer)
2629 b is the initial delay (time)
2630 f is the multiplicative factor (fixed point)
2631 k is the maximum time (time)
2632 threshold where to store threshold
2633 base where to store base in milliseconds
2634 factor where to store factor in milliseconds
2635 limit where to store limit
2636
2637 Returns: nothing (panics on error)
2638 */
2639
2640 static void
2641 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2642 int *limit)
2643 {
2644 uschar bstring[16], lstring[16];
2645
2646 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2647 factor, lstring) == 4)
2648 {
2649 *base = readconf_readtime(bstring, 0, TRUE);
2650 *limit = readconf_readtime(lstring, 0, TRUE);
2651 if (*base >= 0 && *limit >= 0) return;
2652 }
2653 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2654 }
2655
2656
2657
2658
2659 /*************************************************
2660 * Read main configuration options *
2661 *************************************************/
2662
2663 /* This function is the first to be called for configuration reading. It
2664 opens the configuration file and reads general configuration settings until
2665 it reaches the end of the configuration section. The file is then left open so
2666 that the remaining configuration data can subsequently be read if needed for
2667 this run of Exim.
2668
2669 The configuration file must be owned either by root or exim, and be writeable
2670 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2671 in the config file, so the test is done on the compiled in values. A slight
2672 anomaly, to be carefully documented.
2673
2674 The name of the configuration file is taken from a list that is included in the
2675 binary of Exim. It can be altered from the command line, but if that is done,
2676 root privilege is immediately withdrawn unless the caller is root or exim.
2677 The first file on the list that exists is used.
2678
2679 For use on multiple systems that share file systems, first look for a
2680 configuration file whose name has the current node name on the end. If that is
2681 not found, try the generic name. For really contorted configurations, that run
2682 multiple Exims with different uid settings, first try adding the effective uid
2683 before the node name. These complications are going to waste resources on most
2684 systems. Therefore they are available only when requested by compile-time
2685 options. */
2686
2687 void
2688 readconf_main(void)
2689 {
2690 int sep = 0;
2691 struct stat statbuf;
2692 uschar *s, *filename;
2693 uschar *list = config_main_filelist;
2694
2695 /* Loop through the possible file names */
2696
2697 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2698 != NULL)
2699 {
2700 /* Cut out all the fancy processing unless specifically wanted */
2701
2702 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2703 uschar *suffix = filename + Ustrlen(filename);
2704
2705 /* Try for the node-specific file if a node name exists */
2706
2707 #ifdef CONFIGURE_FILE_USE_NODE
2708 struct utsname uts;
2709 if (uname(&uts) >= 0)
2710 {
2711 #ifdef CONFIGURE_FILE_USE_EUID
2712 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2713 config_file = Ufopen(filename, "rb");
2714 if (config_file == NULL)
2715 #endif /* CONFIGURE_FILE_USE_EUID */
2716 {
2717 sprintf(CS suffix, ".%.256s", uts.nodename);
2718 config_file = Ufopen(filename, "rb");
2719 }
2720 }
2721 #endif /* CONFIGURE_FILE_USE_NODE */
2722
2723 /* Otherwise, try the generic name, possibly with the euid added */
2724
2725 #ifdef CONFIGURE_FILE_USE_EUID
2726 if (config_file == NULL)
2727 {
2728 sprintf(CS suffix, ".%ld", (long int)original_euid);
2729 config_file = Ufopen(filename, "rb");
2730 }
2731 #endif /* CONFIGURE_FILE_USE_EUID */
2732
2733 /* Finally, try the unadorned name */
2734
2735 if (config_file == NULL)
2736 {
2737 *suffix = 0;
2738 config_file = Ufopen(filename, "rb");
2739 }
2740 #else /* if neither defined */
2741
2742 /* This is the common case when the fancy processing is not included. */
2743
2744 config_file = Ufopen(filename, "rb");
2745 #endif
2746
2747 /* If the file does not exist, continue to try any others. For any other
2748 error, break out (and die). */
2749
2750 if (config_file != NULL || errno != ENOENT) break;
2751 }
2752
2753 /* On success, save the name for verification; config_filename is used when
2754 logging configuration errors (it changes for .included files) whereas
2755 config_main_filename is the name shown by -bP. Failure to open a configuration
2756 file is a serious disaster. */
2757
2758 if (config_file != NULL)
2759 {
2760 config_filename = config_main_filename = string_copy(filename);
2761 }
2762 else
2763 {
2764 if (filename == NULL)
2765 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2766 "%s", config_main_filelist);
2767 else
2768 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2769 "configuration file %s", filename));
2770 }
2771
2772 /* Check the status of the file we have opened, unless it was specified on
2773 the command line, in which case privilege was given away at the start. */
2774
2775 if (!config_changed)
2776 {
2777 if (fstat(fileno(config_file), &statbuf) != 0)
2778 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2779 big_buffer);
2780
2781 if ((statbuf.st_uid != root_uid && /* owner not root */
2782 statbuf.st_uid != exim_uid /* owner not exim */
2783 #ifdef CONFIGURE_OWNER
2784 && statbuf.st_uid != config_uid /* owner not the special one */
2785 #endif
2786 ) || /* or */
2787 (statbuf.st_gid != exim_gid /* group not exim & */
2788 #ifdef CONFIGURE_GROUP
2789 && statbuf.st_gid != config_gid /* group not the special one */
2790 #endif
2791 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2792 /* or */
2793 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2794
2795 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2796 "wrong owner, group, or mode", big_buffer);
2797 }
2798
2799 /* Process the main configuration settings. They all begin with a lower case
2800 letter. If we see something starting with an upper case letter, it is taken as
2801 a macro definition. */
2802
2803 while ((s = get_config_line()) != NULL)
2804 {
2805 if (isupper(s[0])) read_macro_assignment(s);
2806
2807 else if (Ustrncmp(s, "domainlist", 10) == 0)
2808 read_named_list(&domainlist_anchor, &domainlist_count,
2809 MAX_NAMED_LIST, s+10, US"domain list");
2810
2811 else if (Ustrncmp(s, "hostlist", 8) == 0)
2812 read_named_list(&hostlist_anchor, &hostlist_count,
2813 MAX_NAMED_LIST, s+8, US"host list");
2814
2815 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2816 read_named_list(&addresslist_anchor, &addresslist_count,
2817 MAX_NAMED_LIST, s+11, US"address list");
2818
2819 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2820 read_named_list(&localpartlist_anchor, &localpartlist_count,
2821 MAX_NAMED_LIST, s+13, US"local part list");
2822
2823 else
2824 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2825 NULL, US"main option \"%s\" unknown");
2826 }
2827
2828
2829 /* If local_sender_retain is set, local_from_check must be unset. */
2830
2831 if (local_sender_retain && local_from_check)
2832 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2833 "local_sender_retain are set; this combination is not allowed");
2834
2835 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2836 wanted. */
2837
2838 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2839
2840 /* The max retry interval must not be greater than 24 hours. */
2841
2842 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2843
2844 /* remote_max_parallel must be > 0 */
2845
2846 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2847
2848 /* Save the configured setting of freeze_tell, so we can re-instate it at the
2849 start of a new SMTP message. */
2850
2851 freeze_tell_config = freeze_tell;
2852
2853 /* The primary host name may be required for expansion of spool_directory
2854 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2855 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2856 canonize it. Some people like upper case letters in their host names, so we
2857 don't force the case. */
2858
2859 if (primary_hostname == NULL)
2860 {
2861 uschar *hostname;
2862 struct utsname uts;
2863 if (uname(&uts) < 0)
2864 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2865 hostname = US uts.nodename;
2866
2867 if (Ustrchr(hostname, '.') == NULL)
2868 {
2869 int af = AF_INET;
2870 struct hostent *hostdata;
2871
2872 #if HAVE_IPV6
2873 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2874 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2875 TRUE, NULL) != OK))
2876 af = AF_INET6;
2877 #else
2878 af = AF_INET;
2879 #endif
2880
2881 for (;;)
2882 {
2883 #if HAVE_IPV6
2884 #if HAVE_GETIPNODEBYNAME
2885 int error_num;
2886 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2887 #else
2888 hostdata = gethostbyname2(CS hostname, af);
2889 #endif
2890 #else
2891 hostdata = gethostbyname(CS hostname);
2892 #endif
2893
2894 if (hostdata != NULL)
2895 {
2896 hostname = US hostdata->h_name;
2897 break;
2898 }
2899
2900 if (af == AF_INET) break;
2901 af = AF_INET;
2902 }
2903 }
2904
2905 primary_hostname = string_copy(hostname);
2906 }
2907
2908 /* Set up default value for smtp_active_hostname */
2909
2910 smtp_active_hostname = primary_hostname;
2911
2912 /* If spool_directory wasn't set in the build-time configuration, it must have
2913 got set above. Of course, writing to the log may not work if log_file_path is
2914 not set, but it will at least get to syslog or somewhere, with any luck. */
2915
2916 if (*spool_directory == 0)
2917 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2918 "proceed");
2919
2920 /* Expand the spool directory name; it may, for example, contain the primary
2921 host name. Same comment about failure. */
2922
2923 s = expand_string(spool_directory);
2924 if (s == NULL)
2925 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2926 "\"%s\": %s", spool_directory, expand_string_message);
2927 spool_directory = s;
2928
2929 /* Expand log_file_path, which must contain "%s" in any component that isn't
2930 the null string or "syslog". It is also allowed to contain one instance of %D.
2931 However, it must NOT contain % followed by anything else. */
2932
2933 if (*log_file_path != 0)
2934 {
2935 uschar *ss, *sss;
2936 int sep = ':'; /* Fixed for log file path */
2937 s = expand_string(log_file_path);
2938 if (s == NULL)
2939 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2940 "\"%s\": %s", log_file_path, expand_string_message);
2941
2942 ss = s;
2943 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2944 {
2945 uschar *t;
2946 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2947 t = Ustrstr(sss, "%s");
2948 if (t == NULL)
2949 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2950 "contain \"%%s\"", sss);
2951 *t = 'X';
2952 t = Ustrchr(sss, '%');
2953 if (t != NULL)
2954 {
2955 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2956 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2957 "unexpected \"%%\" character", s);
2958 }
2959 }
2960
2961 log_file_path = s;
2962 }
2963
2964 /* Interpret syslog_facility into an integer argument for 'ident' param to
2965 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2966 leading "log_". */
2967
2968 if (syslog_facility_str != NULL)
2969 {
2970 int i;
2971 uschar *s = syslog_facility_str;
2972
2973 if ((Ustrlen(syslog_facility_str) >= 4) &&
2974 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2975 s += 4;
2976
2977 for (i = 0; i < syslog_list_size; i++)
2978 {
2979 if (strcmpic(s, syslog_list[i].name) == 0)
2980 {
2981 syslog_facility = syslog_list[i].value;
2982 break;
2983 }
2984 }
2985
2986 if (i >= syslog_list_size)
2987 {
2988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2989 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2990 }
2991 }
2992
2993 /* Expand pid_file_path */
2994
2995 if (*pid_file_path != 0)
2996 {
2997 s = expand_string(pid_file_path);
2998 if (s == NULL)
2999 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3000 "\"%s\": %s", pid_file_path, expand_string_message);
3001 pid_file_path = s;
3002 }
3003
3004 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3005 message. */
3006
3007 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3008
3009 /* Unpick the SMTP rate limiting options, if set */
3010
3011 if (smtp_ratelimit_mail != NULL)
3012 {
3013 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3014 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3015 }
3016
3017 if (smtp_ratelimit_rcpt != NULL)
3018 {
3019 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3020 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3021 }
3022
3023 /* The qualify domains default to the primary host name */
3024
3025 if (qualify_domain_sender == NULL)
3026 qualify_domain_sender = primary_hostname;
3027 if (qualify_domain_recipient == NULL)
3028 qualify_domain_recipient = qualify_domain_sender;
3029
3030 /* Setting system_filter_user in the configuration sets the gid as well if a
3031 name is given, but a numerical value does not. */
3032
3033 if (system_filter_uid_set && !system_filter_gid_set)
3034 {
3035 struct passwd *pw = getpwuid(system_filter_uid);
3036 if (pw == NULL)
3037 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3038 (long int)system_filter_uid);
3039 system_filter_gid = pw->pw_gid;
3040 system_filter_gid_set = TRUE;
3041 }
3042
3043 /* If the errors_reply_to field is set, check that it is syntactically valid
3044 and ensure it contains a domain. */
3045
3046 if (errors_reply_to != NULL)
3047 {
3048 uschar *errmess;
3049 int start, end, domain;
3050 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3051 &start, &end, &domain, FALSE);
3052
3053 if (recipient == NULL)
3054 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3055 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3056
3057 if (domain == 0)
3058 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3059 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3060 }
3061
3062 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3063 smtp_accept_max must also be set. */
3064
3065 if (smtp_accept_max == 0 &&
3066 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3067 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3068 "smtp_accept_max must be set if smtp_accept_queue or "
3069 "smtp_accept_max_per_host is set");
3070
3071 /* Set up the host number if anything is specified. It is an expanded string
3072 so that it can be computed from the host name, for example. We do this last
3073 so as to ensure that everything else is set up before the expansion. */
3074
3075 if (host_number_string != NULL)
3076 {
3077 uschar *end;
3078 uschar *s = expand_string(host_number_string);
3079 long int n = Ustrtol(s, &end, 0);
3080 while (isspace(*end)) end++;
3081 if (*end != 0)
3082 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3083 "localhost_number value is not a number: %s", s);
3084 if (n > LOCALHOST_MAX)
3085 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3086 "localhost_number is greater than the maximum allowed value (%d)",
3087 LOCALHOST_MAX);
3088 host_number = n;
3089 }
3090
3091 #ifdef SUPPORT_TLS
3092 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3093
3094 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3095 tls_verify_certificates == NULL)
3096 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3097 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3098 (tls_verify_hosts != NULL)? "" : "try_");
3099 #endif
3100 }
3101
3102
3103
3104 /*************************************************
3105 * Initialize one driver *
3106 *************************************************/
3107
3108 /* This is called once the driver's generic options, if any, have been read.
3109 We can now find the driver, set up defaults for the private options, and
3110 unset any "set" bits in the private options table (which might have been
3111 set by another incarnation of the same driver).
3112
3113 Arguments:
3114 d pointer to driver instance block, with generic
3115 options filled in
3116 drivers_available vector of available drivers
3117 size_of_info size of each block in drivers_available
3118 class class of driver, for error message
3119
3120 Returns: pointer to the driver info block
3121 */
3122
3123 static driver_info *
3124 init_driver(driver_instance *d, driver_info *drivers_available,
3125 int size_of_info, uschar *class)
3126 {
3127 driver_info *dd;
3128
3129 for (dd = drivers_available; dd->driver_name[0] != 0;
3130 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3131 {
3132 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3133 {
3134 int i;
3135 int len = dd->options_len;
3136 d->info = dd;
3137 d->options_block = store_get(len);
3138 memcpy(d->options_block, dd->options_block, len);
3139 for (i = 0; i < *(dd->options_count); i++)
3140 dd->options[i].type &= ~opt_set;
3141 return dd;
3142 }
3143 }
3144
3145 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3146 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3147
3148 return NULL; /* never obeyed */
3149 }
3150
3151
3152
3153
3154 /*************************************************
3155 * Initialize driver list *
3156 *************************************************/
3157
3158 /* This function is called for routers, transports, and authentication
3159 mechanisms. It reads the data from the current point in the configuration file
3160 up to the end of the section, and sets up a chain of instance blocks according
3161 to the file's contents. The file will already have been opened by a call to
3162 readconf_main, and must be left open for subsequent reading of further data.
3163
3164 Any errors cause a panic crash. Note that the blocks with names driver_info and
3165 driver_instance must map the first portions of all the _info and _instance
3166 blocks for this shared code to work.
3167
3168 Arguments:
3169 class "router", "transport", or "authenticator"
3170 anchor &routers, &transports, &auths
3171 drivers_available available drivers
3172 size_of_info size of each info block
3173 instance_default points to default data for an instance
3174 instance_size size of instance block
3175 driver_optionlist generic option list
3176 driver_optionlist_count count of generic option list
3177
3178 Returns: nothing
3179 */
3180
3181 void
3182 readconf_driver_init(
3183 uschar *class,
3184 driver_instance **anchor,
3185 driver_info *drivers_available,
3186 int size_of_info,
3187 void *instance_default,
3188 int instance_size,
3189 optionlist *driver_optionlist,
3190 int driver_optionlist_count)
3191 {
3192 driver_instance **p = anchor;
3193 driver_instance *d = NULL;
3194 uschar *buffer;
3195
3196 while ((buffer = get_config_line()) != NULL)
3197 {
3198 uschar name[64];
3199 uschar *s;
3200
3201 /* Read the first name on the line and test for the start of a new driver. A
3202 macro definition indicates the end of the previous driver. If this isn't the
3203 start of a new driver, the line will be re-read. */
3204
3205 s = readconf_readname(name, sizeof(name), buffer);
3206
3207 /* Handle macro definition, first finishing off the initialization of the
3208 previous driver, if any. */
3209
3210 if (isupper(*name) && *s == '=')
3211 {
3212 if (d != NULL)
3213 {
3214 if (d->driver_name == NULL)
3215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3216 "no driver defined for %s \"%s\"", class, d->name);
3217 (d->info->init)(d);
3218 d = NULL;
3219 }
3220 read_macro_assignment(buffer);
3221 continue;
3222 }
3223
3224 /* If the line starts with a name terminated by a colon, we are at the
3225 start of the definition of a new driver. The rest of the line must be
3226 blank. */
3227
3228 if (*s++ == ':')
3229 {
3230 int i;
3231
3232 /* Finish off initializing the previous driver. */
3233
3234 if (d != NULL)
3235 {
3236 if (d->driver_name == NULL)
3237 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3238 "no driver defined for %s \"%s\"", class, d->name);
3239 (d->info->init)(d);
3240 }
3241
3242 /* Check that we haven't already got a driver of this name */
3243
3244 for (d = *anchor; d != NULL; d = d->next)
3245 if (Ustrcmp(name, d->name) == 0)
3246 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3247 "there are two %ss called \"%s\"", class, name);
3248
3249 /* Set up a new driver instance data block on the chain, with
3250 its default values installed. */
3251
3252 d = store_get(instance_size);
3253 memcpy(d, instance_default, instance_size);
3254 *p = d;
3255 p = &(d->next);
3256 d->name = string_copy(name);
3257
3258 /* Clear out the "set" bits in the generic options */
3259
3260 for (i = 0; i < driver_optionlist_count; i++)
3261 driver_optionlist[i].type &= ~opt_set;
3262
3263 /* Check nothing more on this line, then do the next loop iteration. */
3264
3265 while (isspace(*s)) s++;
3266 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3267 continue;
3268 }
3269
3270 /* Not the start of a new driver. Give an error if we have not set up a
3271 current driver yet. */
3272
3273 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3274 "%s name missing", class);
3275
3276 /* First look to see if this is a generic option; if it is "driver",
3277 initialize the driver. If is it not a generic option, we can look for a
3278 private option provided that the driver has been previously set up. */
3279
3280 if (readconf_handle_option(buffer, driver_optionlist,
3281 driver_optionlist_count, d, NULL))
3282 {
3283 if (d->info == NULL && d->driver_name != NULL)
3284 init_driver(d, drivers_available, size_of_info, class);
3285 }
3286
3287 /* Handle private options - pass the generic block because some may
3288 live therein. A flag with each option indicates if it is in the public
3289 block. */
3290
3291 else if (d->info != NULL)
3292 {
3293 readconf_handle_option(buffer, d->info->options,
3294 *(d->info->options_count), d, US"option \"%s\" unknown");
3295 }
3296
3297 /* The option is not generic and the driver name has not yet been given. */
3298
3299 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3300 "(\"driver\" must be specified before any private options)", name);
3301 }
3302
3303 /* Run the initialization function for the final driver. */
3304
3305 if (d != NULL)
3306 {
3307 if (d->driver_name == NULL)
3308 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3309 "no driver defined for %s \"%s\"", class, d->name);
3310 (d->info->init)(d);
3311 }
3312 }
3313
3314
3315
3316 /*************************************************
3317 * Check driver dependency *
3318 *************************************************/
3319
3320 /* This function is passed a driver instance and a string. It checks whether
3321 any of the string options for the driver contains the given string as an
3322 expansion variable.
3323
3324 Arguments:
3325 d points to a driver instance block
3326 s the string to search for
3327
3328 Returns: TRUE if a dependency is found
3329 */
3330
3331 BOOL
3332 readconf_depends(driver_instance *d, uschar *s)
3333 {
3334 int count = *(d->info->options_count);
3335 optionlist *ol;
3336 uschar *ss;
3337
3338 for (ol = d->info->options; ol < d->info->options + count; ol++)
3339 {
3340 void *options_block;
3341 uschar *value;
3342 int type = ol->type & opt_mask;
3343 if (type != opt_stringptr) continue;
3344 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3345 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3346 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3347 {
3348 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3349 isalnum(ss[Ustrlen(s)])) continue;
3350 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3351 d->name, ol->name, s);
3352 return TRUE;
3353 }
3354 }
3355
3356 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3357 return FALSE;
3358 }
3359
3360
3361
3362
3363 /*************************************************
3364 * Decode an error type for retries *
3365 *************************************************/
3366
3367 /* This function is global because it is also called from the main
3368 program when testing retry information. It decodes strings such as "quota_7d"
3369 into numerical error codes.
3370
3371 Arguments:
3372 pp points to start of text
3373 p points past end of text
3374 basic_errno points to an int to receive the main error number
3375 more_errno points to an int to receive the secondary error data
3376
3377 Returns: NULL if decoded correctly; else points to error text
3378 */
3379
3380 uschar *
3381 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3382 {
3383 int len;
3384 uschar *q = pp;
3385 while (q < p && *q != '_') q++;
3386 len = q - pp;
3387
3388 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3389 {
3390 *basic_errno = ERRNO_EXIMQUOTA;
3391 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3392 return US"bad time value";
3393 }
3394
3395 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3396 {
3397 *basic_errno = ECONNREFUSED;
3398 if (q != p)
3399 {
3400 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3401 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3402 else return US"A or MX expected after \"refused\"";
3403 }
3404 }
3405
3406 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3407 {
3408 *basic_errno = ETIMEDOUT;
3409 if (q != p)
3410 {
3411 int i;
3412 int xlen = p - q - 1;
3413 uschar *x = q + 1;
3414
3415 static uschar *extras[] =
3416 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3417 static int values[] =
3418 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3419
3420 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3421 {
3422 if (strncmpic(x, extras[i], xlen) == 0)
3423 {
3424 *more_errno = values[i];
3425 break;
3426 }
3427 }
3428
3429 if (i >= sizeof(extras)/sizeof(uschar *))
3430 {
3431 if (strncmpic(x, US"DNS", xlen) == 0)
3432 {
3433 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3434 "available in retry rules (it has never worked) - treated as "
3435 "\"timeout\"");
3436 }
3437 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3438 }
3439 }
3440 }
3441
3442 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3443 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3444 strncmpic(pp, US"data_4", 6) == 0)
3445 {
3446 BOOL bad = FALSE;
3447 int x = 255; /* means "any 4xx code" */
3448 if (p != pp + 8) bad = TRUE; else
3449 {
3450 int a = pp[6], b = pp[7];
3451 if (isdigit(a))
3452 {
3453 x = (a - '0') * 10;
3454 if (isdigit(b)) x += b - '0';
3455 else if (b == 'x') x += 100;
3456 else bad = TRUE;
3457 }
3458 else if (a != 'x' || b != 'x') bad = TRUE;
3459 }
3460
3461 if (bad)
3462 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3463 "x is literal and d is any digit", pp);
3464
3465 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3466 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3467 *more_errno = x << 8;
3468 }
3469
3470 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3471 strncmpic(q+1, US"failed", p-q-1) == 0)
3472 *basic_errno = ERRNO_AUTHFAIL;
3473
3474 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3475 *basic_errno = ERRNO_SMTPCLOSED;
3476
3477 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3478 *basic_errno = ERRNO_TLSREQUIRED;
3479
3480 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3481 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3482
3483 return NULL;
3484 }
3485
3486
3487
3488
3489 /*************************************************
3490 * Read retry information *
3491 *************************************************/
3492
3493 /* Each line of retry information contains:
3494
3495 . A domain name pattern or an address pattern;
3496
3497 . An error name, possibly with additional data, or *;
3498
3499 . An optional sequence of retry items, each consisting of an identifying
3500 letter, a cutoff time, and optional parameters.
3501
3502 All this is decoded and placed into a control block. */
3503
3504
3505 /* Subroutine to read an argument, preceded by a comma and terminated
3506 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3507 1 = fixed point number (returned *1000).
3508
3509 Arguments:
3510 paddr pointer to pointer to current character; updated
3511 type 0 => read a time; 1 => read a fixed point number
3512
3513 Returns: time in seconds or fixed point number * 1000
3514 */
3515
3516 static int
3517 retry_arg(uschar **paddr, int type)
3518 {
3519 uschar *p = *paddr;
3520 uschar *pp;
3521
3522 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3523
3524 while (isspace(*p)) p++;
3525 pp = p;
3526 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3527
3528 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3530
3531 *paddr = p;
3532 switch (type)
3533 {
3534 case 0:
3535 return readconf_readtime(pp, *p, FALSE);
3536 case 1:
3537 return readconf_readfixed(pp, *p);
3538 }
3539 return 0; /* Keep picky compilers happy */
3540 }
3541
3542 /* The function proper */
3543
3544 void
3545 readconf_retries(void)
3546 {
3547 retry_config **chain = &retries;
3548 retry_config *next;
3549 uschar *p;
3550
3551 while ((p = get_config_line()) != NULL)
3552 {
3553 retry_rule **rchain;
3554 uschar *pp, *error;
3555
3556 next = store_get(sizeof(retry_config));
3557 next->next = NULL;
3558 *chain = next;
3559 chain = &(next->next);
3560 next->basic_errno = next->more_errno = 0;
3561 next->senders = NULL;
3562 next->rules = NULL;
3563 rchain = &(next->rules);
3564
3565 next->pattern = string_dequote(&p);
3566 while (isspace(*p)) p++;
3567 pp = p;
3568 while (mac_isgraph(*p)) p++;
3569 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3570 "missing error type");
3571
3572 /* Test error names for things we understand. */
3573
3574 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3575 &(next->more_errno))) != NULL)
3576 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3577
3578 /* There may be an optional address list of senders to be used as another
3579 constraint on the rule. This was added later, so the syntax is a bit of a
3580 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3581 an address list. */
3582
3583 while (isspace(*p)) p++;
3584 if (Ustrncmp(p, "senders", 7) == 0)
3585 {
3586 p += 7;
3587 while (isspace(*p)) p++;
3588 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3589 "\"=\" expected after \"senders\" in retry rule");
3590 while (isspace(*p)) p++;
3591 next->senders = string_dequote(&p);
3592 }
3593
3594 /* Now the retry rules. Keep the maximum timeout encountered. */
3595
3596 while (isspace(*p)) p++;
3597
3598 while (*p != 0)
3599 {
3600 retry_rule *rule = store_get(sizeof(retry_rule));
3601 *rchain = rule;
3602 rchain = &(rule->next);
3603 rule->next = NULL;
3604 rule->rule = toupper(*p++);
3605 rule->timeout = retry_arg(&p, 0);
3606 if (rule->timeout > retry_maximum_timeout)
3607 retry_maximum_timeout = rule->timeout;
3608
3609 switch (rule->rule)
3610 {
3611 case 'F': /* Fixed interval */
3612 rule->p1 = retry_arg(&p, 0);
3613 break;
3614
3615 case 'G': /* Geometrically increasing intervals */
3616 case 'H': /* Ditto, but with randomness */
3617 rule->p1 = retry_arg(&p, 0);
3618 rule->p2 = retry_arg(&p, 1);
3619 break;
3620
3621 default:
3622 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3623 break;
3624 }
3625
3626 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3627 (rule->rule != 'F' && rule->p2 < 1000))
3628 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3629 "bad parameters for retry rule");
3630
3631 while (isspace(*p)) p++;
3632 if (*p == ';')
3633 {
3634 p++;
3635 while (isspace(*p)) p++;
3636 }
3637 else if (*p != 0)
3638 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3639 }
3640 }
3641 }
3642
3643
3644
3645 /*************************************************
3646 * Initialize authenticators *
3647 *************************************************/
3648
3649 /* Read the authenticators section of the configuration file.
3650
3651 Arguments: none
3652 Returns: nothing
3653 */
3654
3655 static void
3656 auths_init(void)
3657 {
3658 auth_instance *au, *bu;
3659 readconf_driver_init(US"authenticator",
3660 (driver_instance **)(&auths), /* chain anchor */
3661 (driver_info *)auths_available, /* available drivers */
3662 sizeof(auth_info), /* size of info block */
3663 &auth_defaults, /* default values for generic options */
3664 sizeof(auth_instance), /* size of instance block */
3665 optionlist_auths, /* generic options */
3666 optionlist_auths_size);
3667
3668 for (au = auths; au != NULL; au = au->next)
3669 {
3670 if (au->public_name == NULL)
3671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3672 "the %s authenticator", au->name);
3673 for (bu = au->next; bu != NULL; bu = bu->next)
3674 {
3675 if (strcmpic(au->public_name, bu->public_name) == 0)
3676 {
3677 if ((au->client && bu->client) || (au->server && bu->server))
3678 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3679 "(%s and %s) have the same public name (%s)",
3680 (au->client)? US"client" : US"server", au->name, bu->name,
3681 au->public_name);
3682 }
3683 }
3684 }
3685 }
3686
3687
3688
3689
3690 /*************************************************
3691 * Read ACL information *
3692 *************************************************/
3693
3694 /* If this run of Exim is not doing something that involves receiving a
3695 message, we can just skip over the ACL information. No need to parse it.
3696
3697 First, we have a function for acl_read() to call back to get the next line. We
3698 need to remember the line we passed, because at the end it will contain the
3699 name of the next ACL. */
3700
3701 static uschar *acl_line;
3702
3703 static uschar *
3704 acl_callback(void)
3705 {
3706 acl_line = get_config_line();
3707 return acl_line;
3708 }
3709
3710
3711 /* Now the main function:
3712
3713 Arguments:
3714 skip TRUE when this Exim process is doing something that will
3715 not need the ACL data
3716
3717 Returns: nothing
3718 */
3719
3720 static void
3721 readconf_acl(BOOL skip)
3722 {
3723 uschar *p;
3724
3725 /* Not receiving messages, don't need to parse the ACL data */
3726
3727 if (skip)
3728 {
3729 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3730 while ((p = get_config_line()) != NULL);
3731 return;
3732 }
3733
3734 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3735 between ACLs. */
3736
3737 acl_line = get_config_line();
3738
3739 while(acl_line != NULL)
3740 {
3741 uschar name[64];
3742 tree_node *node;
3743 uschar *error;
3744
3745 p = readconf_readname(name, sizeof(name), acl_line);
3746 if (isupper(*name) && *p == '=')
3747 {
3748 read_macro_assignment(acl_line);
3749 acl_line = get_config_line();
3750 continue;
3751 }
3752
3753 if (*p != ':' || name[0] == 0)
3754 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3755
3756 node = store_get(sizeof(tree_node) + Ustrlen(name));
3757 Ustrcpy(node->name, name);
3758 if (!tree_insertnode(&acl_anchor, node))
3759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3760 "there are two ACLs called \"%s\"", name);
3761
3762 node->data.ptr = acl_read(acl_callback, &error);
3763
3764 if (node->data.ptr == NULL && error != NULL)
3765 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3766 }
3767 }
3768
3769
3770
3771 /*************************************************
3772 * Read configuration for local_scan() *
3773 *************************************************/
3774
3775 /* This function is called after "begin local_scan" is encountered in the
3776 configuration file. If the local_scan() function allows for configuration
3777 options, we can process them. Otherwise, we expire in a panic.
3778
3779 Arguments: none
3780 Returns: nothing
3781 */
3782
3783 static void
3784 local_scan_init(void)
3785 {
3786 #ifndef LOCAL_SCAN_HAS_OPTIONS
3787 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3788 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3789 #else
3790
3791 uschar *p;
3792 while ((p = get_config_line()) != NULL)
3793 {
3794 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3795 NULL, US"local_scan option \"%s\" unknown");
3796 }
3797 #endif
3798 }
3799
3800
3801
3802 /*************************************************
3803 * Read rest of configuration (after main) *
3804 *************************************************/
3805
3806 /* This function reads the rest of the runtime configuration, after the main
3807 configuration. It is called only when actually needed. Each subsequent section
3808 of the configuration starts with a line of the form
3809
3810 begin name
3811
3812 where the name is "routers", "transports", etc. A section is terminated by
3813 hitting the next "begin" line, and the next name is left in next_section.
3814 Because it may confuse people as to whether the names are singular or plural,
3815 we add "s" if it's missing. There is always enough room in next_section for
3816 this. This function is basically just a switch.
3817
3818 Arguments:
3819 skip_acl TRUE if ACL information is not needed
3820
3821 Returns: nothing
3822 */
3823
3824 static uschar *section_list[] = {
3825 US"acls",
3826 US"authenticators",
3827 US"local_scans",
3828 US"retrys",
3829 US"rewrites",
3830 US"routers",
3831 US"transports"};
3832
3833 void
3834 readconf_rest(BOOL skip_acl)
3835 {
3836 int had = 0;
3837
3838 while(next_section[0] != 0)
3839 {
3840 int bit;
3841 int first = 0;
3842 int last = sizeof(section_list) / sizeof(uschar *);
3843 int mid = last/2;
3844 int n = Ustrlen(next_section);
3845
3846 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3847
3848 for (;;)
3849 {
3850 int c = strcmpic(next_section, section_list[mid]);
3851 if (c == 0) break;
3852 if (c > 0) first = mid + 1; else last = mid;
3853 if (first >= last)
3854 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3855 "\"%.*s\" is not a known configuration section name", n, next_section);
3856 mid = (last + first)/2;
3857 }
3858
3859 bit = 1 << mid;
3860 if (((had ^= bit) & bit) == 0)
3861 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3862 "\"%.*s\" section is repeated in the configuration file", n,
3863 next_section);
3864
3865 switch(mid)
3866 {
3867 case 0: readconf_acl(skip_acl); break;
3868 case 1: auths_init(); break;
3869 case 2: local_scan_init(); break;
3870 case 3: readconf_retries(); break;
3871 case 4: readconf_rewrites(); break;
3872 case 5: route_init(); break;
3873 case 6: transport_init(); break;
3874 }
3875 }
3876
3877 (void)fclose(config_file);
3878 }
3879
3880 /* End of readconf.c */
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