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Expand uidlists and gidlists (admin_groups, never_users, trusted_users,
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.14 2005/09/19 14:01:51 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2005 */
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_smtp_auth", opt_stringptr, &acl_smtp_auth },
142 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
143 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
144 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
145 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
146 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
147 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
148 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
149 #ifdef WITH_CONTENT_SCAN
150 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
151 #endif
152 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
153 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
154 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
155 #ifdef SUPPORT_TLS
156 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
157 #endif
158 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
159 { "admin_groups", opt_gidlist, &admin_groups },
160 { "allow_domain_literals", opt_bool, &allow_domain_literals },
161 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
162 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
163 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
164 { "auto_thaw", opt_time, &auto_thaw },
165 #ifdef WITH_CONTENT_SCAN
166 { "av_scanner", opt_stringptr, &av_scanner },
167 #endif
168 { "bi_command", opt_stringptr, &bi_command },
169 #ifdef EXPERIMENTAL_BRIGHTMAIL
170 { "bmi_config_file", opt_stringptr, &bmi_config_file },
171 #endif
172 { "bounce_message_file", opt_stringptr, &bounce_message_file },
173 { "bounce_message_text", opt_stringptr, &bounce_message_text },
174 { "bounce_return_body", opt_bool, &bounce_return_body },
175 { "bounce_return_message", opt_bool, &bounce_return_message },
176 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
177 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
178 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
179 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
180 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
181 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
182 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
183 { "check_log_inodes", opt_int, &check_log_inodes },
184 { "check_log_space", opt_Kint, &check_log_space },
185 { "check_spool_inodes", opt_int, &check_spool_inodes },
186 { "check_spool_space", opt_Kint, &check_spool_space },
187 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
188 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
189 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
190 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
191 { "delay_warning", opt_timelist, &delay_warning },
192 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
193 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
194 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
195 { "delivery_date_remove", opt_bool, &delivery_date_remove },
196 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
197 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
198 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
199 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
200 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
201 { "dns_retrans", opt_time, &dns_retrans },
202 { "dns_retry", opt_int, &dns_retry },
203 /* This option is now a no-op, retained for compability */
204 { "drop_cr", opt_bool, &drop_cr },
205 /*********************************************************/
206 { "envelope_to_remove", opt_bool, &envelope_to_remove },
207 { "errors_copy", opt_stringptr, &errors_copy },
208 { "errors_reply_to", opt_stringptr, &errors_reply_to },
209 { "exim_group", opt_gid, &exim_gid },
210 { "exim_path", opt_stringptr, &exim_path },
211 { "exim_user", opt_uid, &exim_uid },
212 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
213 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
214 { "finduser_retries", opt_int, &finduser_retries },
215 { "freeze_tell", opt_stringptr, &freeze_tell },
216 { "gecos_name", opt_stringptr, &gecos_name },
217 { "gecos_pattern", opt_stringptr, &gecos_pattern },
218 { "header_line_maxsize", opt_int, &header_line_maxsize },
219 { "header_maxsize", opt_int, &header_maxsize },
220 { "headers_charset", opt_stringptr, &headers_charset },
221 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
222 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
223 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
224 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
225 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
226 { "hold_domains", opt_stringptr, &hold_domains },
227 { "host_lookup", opt_stringptr, &host_lookup },
228 { "host_lookup_order", opt_stringptr, &host_lookup_order },
229 { "host_reject_connection", opt_stringptr, &host_reject_connection },
230 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
231 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
232 #ifdef LOOKUP_IBASE
233 { "ibase_servers", opt_stringptr, &ibase_servers },
234 #endif
235 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
236 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
237 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
238 { "keep_malformed", opt_time, &keep_malformed },
239 #ifdef LOOKUP_LDAP
240 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
241 { "ldap_version", opt_int, &eldap_version },
242 #endif
243 { "local_from_check", opt_bool, &local_from_check },
244 { "local_from_prefix", opt_stringptr, &local_from_prefix },
245 { "local_from_suffix", opt_stringptr, &local_from_suffix },
246 { "local_interfaces", opt_stringptr, &local_interfaces },
247 { "local_scan_timeout", opt_time, &local_scan_timeout },
248 { "local_sender_retain", opt_bool, &local_sender_retain },
249 { "localhost_number", opt_stringptr, &host_number_string },
250 { "log_file_path", opt_stringptr, &log_file_path },
251 { "log_selector", opt_stringptr, &log_selector_string },
252 { "log_timezone", opt_bool, &log_timezone },
253 { "lookup_open_max", opt_int, &lookup_open_max },
254 { "max_username_length", opt_int, &max_username_length },
255 { "message_body_visible", opt_mkint, &message_body_visible },
256 { "message_id_header_domain", opt_stringptr, &message_id_domain },
257 { "message_id_header_text", opt_stringptr, &message_id_text },
258 { "message_logs", opt_bool, &message_logs },
259 { "message_size_limit", opt_stringptr, &message_size_limit },
260 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
261 { "move_frozen_messages", opt_bool, &move_frozen_messages },
262 #endif
263 { "mua_wrapper", opt_bool, &mua_wrapper },
264 #ifdef LOOKUP_MYSQL
265 { "mysql_servers", opt_stringptr, &mysql_servers },
266 #endif
267 { "never_users", opt_uidlist, &never_users },
268 #ifdef LOOKUP_ORACLE
269 { "oracle_servers", opt_stringptr, &oracle_servers },
270 #endif
271 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
272 #ifdef EXIM_PERL
273 { "perl_at_start", opt_bool, &opt_perl_at_start },
274 { "perl_startup", opt_stringptr, &opt_perl_startup },
275 #endif
276 #ifdef LOOKUP_PGSQL
277 { "pgsql_servers", opt_stringptr, &pgsql_servers },
278 #endif
279 { "pid_file_path", opt_stringptr, &pid_file_path },
280 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
281 { "preserve_message_logs", opt_bool, &preserve_message_logs },
282 { "primary_hostname", opt_stringptr, &primary_hostname },
283 { "print_topbitchars", opt_bool, &print_topbitchars },
284 { "process_log_path", opt_stringptr, &process_log_path },
285 { "prod_requires_admin", opt_bool, &prod_requires_admin },
286 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
287 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
288 { "queue_domains", opt_stringptr, &queue_domains },
289 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
290 { "queue_only", opt_bool, &queue_only },
291 { "queue_only_file", opt_stringptr, &queue_only_file },
292 { "queue_only_load", opt_fixed, &queue_only_load },
293 { "queue_only_override", opt_bool, &queue_only_override },
294 { "queue_run_in_order", opt_bool, &queue_run_in_order },
295 { "queue_run_max", opt_int, &queue_run_max },
296 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
297 { "receive_timeout", opt_time, &receive_timeout },
298 { "received_header_text", opt_stringptr, &received_header_text },
299 { "received_headers_max", opt_int, &received_headers_max },
300 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
301 { "recipients_max", opt_int, &recipients_max },
302 { "recipients_max_reject", opt_bool, &recipients_max_reject },
303 { "remote_max_parallel", opt_int, &remote_max_parallel },
304 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
305 { "retry_data_expire", opt_time, &retry_data_expire },
306 { "retry_interval_max", opt_time, &retry_interval_max },
307 { "return_path_remove", opt_bool, &return_path_remove },
308 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
309 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
310 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
311 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
312 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
313 { "smtp_accept_max", opt_int, &smtp_accept_max },
314 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
315 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
316 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
317 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
318 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
319 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
320 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
321 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
322 { "smtp_banner", opt_stringptr, &smtp_banner },
323 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
324 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
325 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
326 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
327 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
328 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
329 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
330 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
331 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
332 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
333 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
334 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
335 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
336 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
337 #ifdef WITH_CONTENT_SCAN
338 { "spamd_address", opt_stringptr, &spamd_address },
339 #endif
340 { "split_spool_directory", opt_bool, &split_spool_directory },
341 { "spool_directory", opt_stringptr, &spool_directory },
342 #ifdef LOOKUP_SQLITE
343 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
344 #endif
345 #ifdef EXPERIMENTAL_SRS
346 { "srs_config", opt_stringptr, &srs_config },
347 { "srs_hashlength", opt_int, &srs_hashlength },
348 { "srs_hashmin", opt_int, &srs_hashmin },
349 { "srs_maxage", opt_int, &srs_maxage },
350 { "srs_secrets", opt_stringptr, &srs_secrets },
351 { "srs_usehash", opt_bool, &srs_usehash },
352 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
353 #endif
354 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
355 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
356 { "syslog_duplication", opt_bool, &syslog_duplication },
357 { "syslog_facility", opt_stringptr, &syslog_facility_str },
358 { "syslog_processname", opt_stringptr, &syslog_processname },
359 { "syslog_timestamp", opt_bool, &syslog_timestamp },
360 { "system_filter", opt_stringptr, &system_filter },
361 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
362 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
363 { "system_filter_group", opt_gid, &system_filter_gid },
364 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
365 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
366 { "system_filter_user", opt_uid, &system_filter_uid },
367 { "tcp_nodelay", opt_bool, &tcp_nodelay },
368 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
369 { "timezone", opt_stringptr, &timezone_string },
370 #ifdef SUPPORT_TLS
371 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
372 { "tls_certificate", opt_stringptr, &tls_certificate },
373 { "tls_crl", opt_stringptr, &tls_crl },
374 { "tls_dhparam", opt_stringptr, &tls_dhparam },
375 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
376 { "tls_privatekey", opt_stringptr, &tls_privatekey },
377 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
378 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
379 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
380 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
381 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
382 #endif
383 { "trusted_groups", opt_gidlist, &trusted_groups },
384 { "trusted_users", opt_uidlist, &trusted_users },
385 { "unknown_login", opt_stringptr, &unknown_login },
386 { "unknown_username", opt_stringptr, &unknown_username },
387 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
388 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
389 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
390 { "warn_message_file", opt_stringptr, &warn_message_file },
391 { "write_rejectlog", opt_bool, &write_rejectlog }
392 };
393
394 static int optionlist_config_size =
395 sizeof(optionlist_config)/sizeof(optionlist);
396
397
398
399 /*************************************************
400 * Find the name of an option *
401 *************************************************/
402
403 /* This function is to aid debugging. Various functions take arguments that are
404 pointer variables in the options table or in option tables for various drivers.
405 For debugging output, it is useful to be able to find the name of the option
406 which is currently being processed. This function finds it, if it exists, by
407 searching the table(s).
408
409 Arguments: a value that is presumed to be in the table above
410 Returns: the option name, or an empty string
411 */
412
413 uschar *
414 readconf_find_option(void *p)
415 {
416 int i;
417 router_instance *r;
418 transport_instance *t;
419
420 for (i = 0; i < optionlist_config_size; i++)
421 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
422
423 for (r = routers; r != NULL; r = r->next)
424 {
425 router_info *ri = r->info;
426 for (i = 0; i < ri->options_count[0]; i++)
427 {
428 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
429 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
430 return US ri->options[i].name;
431 }
432 }
433
434 for (t = transports; t != NULL; t = t->next)
435 {
436 transport_info *ti = t->info;
437 for (i = 0; i < ti->options_count[0]; i++)
438 {
439 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
440 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
441 return US ti->options[i].name;
442 }
443 }
444
445 return US"";
446 }
447
448
449
450
451 /*************************************************
452 * Deal with an assignment to a macro *
453 *************************************************/
454
455 /* This function is called when a line that starts with an upper case letter is
456 encountered. The argument "line" should contain a complete logical line, and
457 start with the first letter of the macro name. The macro name and the
458 replacement text are extracted and stored. Redefinition of existing,
459 non-command line, macros is permitted using '==' instead of '='.
460
461 Arguments:
462 s points to the start of the logical line
463
464 Returns: nothing
465 */
466
467 static void
468 read_macro_assignment(uschar *s)
469 {
470 uschar name[64];
471 int namelen = 0;
472 BOOL redef = FALSE;
473 macro_item *m;
474 macro_item *mlast = NULL;
475
476 while (isalnum(*s) || *s == '_')
477 {
478 if (namelen >= sizeof(name) - 1)
479 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
480 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
481 name[namelen++] = *s++;
482 }
483 name[namelen] = 0;
484
485 while (isspace(*s)) s++;
486 if (*s++ != '=')
487 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
488
489 if (*s == '=')
490 {
491 redef = TRUE;
492 s++;
493 }
494 while (isspace(*s)) s++;
495
496 /* If an existing macro of the same name was defined on the command line, we
497 just skip this definition. It's an error to attempt to redefine a macro without
498 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
499 It is also an error to define a macro whose name begins with the name of a
500 previously defined macro. Note: it is documented that the other way round
501 works. */
502
503 for (m = macros; m != NULL; m = m->next)
504 {
505 int len = Ustrlen(m->name);
506
507 if (Ustrcmp(m->name, name) == 0)
508 {
509 if (!m->command_line && !redef)
510 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
511 "defined (use \"==\" if you want to redefine it", name);
512 break;
513 }
514
515 if (len < namelen && Ustrstr(name, m->name) != NULL)
516 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
517 "a macro because previously defined macro \"%s\" is a substring",
518 name, m->name);
519
520 /* We cannot have this test, because it is documented that a substring
521 macro is permitted (there is even an example).
522 *
523 * if (len > namelen && Ustrstr(m->name, name) != NULL)
524 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
525 * "a macro because it is a substring of previously defined macro \"%s\"",
526 * name, m->name);
527 */
528
529 mlast = m;
530 }
531
532 /* Check for an overriding command-line definition. */
533
534 if (m != NULL && m->command_line) return;
535
536 /* Redefinition must refer to an existing macro. */
537
538 if (redef)
539 {
540 if (m == NULL)
541 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
542 "\"%s\"", name);
543 }
544
545 /* We have a new definition. The macro_item structure includes a final vector
546 called "name" which is one byte long. Thus, adding "namelen" gives us enough
547 room to store the "name" string. */
548
549 else
550 {
551 m = store_get(sizeof(macro_item) + namelen);
552 if (macros == NULL) macros = m; else mlast->next = m;
553 Ustrncpy(m->name, name, namelen);
554 m->name[namelen] = 0;
555 m->next = NULL;
556 m->command_line = FALSE;
557 }
558
559 /* Set the value of the new or redefined macro */
560
561 m->replacement = string_copy(s);
562 }
563
564
565
566
567
568 /*************************************************
569 * Read configuration line *
570 *************************************************/
571
572 /* A logical line of text is read from the configuration file into the big
573 buffer, taking account of macros, .includes, and continuations. The size of
574 big_buffer is increased if necessary. The count of configuration lines is
575 maintained. Physical input lines starting with # (ignoring leading white space,
576 and after macro replacement) and empty logical lines are always ignored.
577 Leading and trailing spaces are removed.
578
579 If we hit a line of the form "begin xxxx", the xxxx is placed in the
580 next_section vector, and the function returns NULL, indicating the end of a
581 configuration section. On end-of-file, NULL is returned with next_section
582 empty.
583
584 Arguments: none
585
586 Returns: a pointer to the first non-blank in the line,
587 or NULL if eof or end of section is reached
588 */
589
590 static uschar *
591 get_config_line(void)
592 {
593 int startoffset = 0; /* To first non-blank char in logical line */
594 int len = 0; /* Of logical line so far */
595 int newlen;
596 uschar *s, *ss;
597 macro_item *m;
598 BOOL macro_found;
599
600 /* Loop for handling continuation lines, skipping comments, and dealing with
601 .include files. */
602
603 for (;;)
604 {
605 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
606 {
607 if (config_file_stack != NULL) /* EOF inside .include */
608 {
609 (void)fclose(config_file);
610 config_file = config_file_stack->file;
611 config_filename = config_file_stack->filename;
612 config_lineno = config_file_stack->lineno;
613 config_file_stack = config_file_stack->next;
614 continue;
615 }
616
617 /* EOF at top level */
618
619 if (cstate_stack_ptr >= 0)
620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
621 "Unexpected end of configuration file: .endif missing");
622
623 if (len != 0) break; /* EOF after continuation */
624 next_section[0] = 0; /* EOF at start of logical line */
625 return NULL;
626 }
627
628 config_lineno++;
629 newlen = len + Ustrlen(big_buffer + len);
630
631 /* Handle pathologically long physical lines - yes, it did happen - by
632 extending big_buffer at this point. The code also copes with very long
633 logical lines. */
634
635 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
636 {
637 uschar *newbuffer;
638 big_buffer_size += BIG_BUFFER_SIZE;
639 newbuffer = store_malloc(big_buffer_size);
640
641 /* This use of strcpy is OK because we know that the string in the old
642 buffer is shorter than the new buffer. */
643
644 Ustrcpy(newbuffer, big_buffer);
645 store_free(big_buffer);
646 big_buffer = newbuffer;
647 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
648 break;
649 newlen += Ustrlen(big_buffer + newlen);
650 }
651
652 /* Find the true start of the physical line - leading spaces are always
653 ignored. */
654
655 ss = big_buffer + len;
656 while (isspace(*ss)) ss++;
657
658 /* Process the physical line for macros. If this is the start of the logical
659 line, skip over initial text at the start of the line if it starts with an
660 upper case character followed by a sequence of name characters and an equals
661 sign, because that is the definition of a new macro, and we don't do
662 replacement therein. */
663
664 s = ss;
665 if (len == 0 && isupper(*s))
666 {
667 while (isalnum(*s) || *s == '_') s++;
668 while (isspace(*s)) s++;
669 if (*s != '=') s = ss; /* Not a macro definition */
670 }
671
672 /* For each defined macro, scan the line (from after XXX= if present),
673 replacing all occurrences of the macro. */
674
675 macro_found = FALSE;
676 for (m = macros; m != NULL; m = m->next)
677 {
678 uschar *p, *pp;
679 uschar *t = s;
680
681 while ((p = Ustrstr(t, m->name)) != NULL)
682 {
683 int moveby;
684 int namelen = Ustrlen(m->name);
685 int replen = Ustrlen(m->replacement);
686
687 /* Expand the buffer if necessary */
688
689 while (newlen - namelen + replen + 1 > big_buffer_size)
690 {
691 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
692 uschar *newbuffer = store_malloc(newsize);
693 memcpy(newbuffer, big_buffer, newlen + 1);
694 p = newbuffer + (p - big_buffer);
695 s = newbuffer + (s - big_buffer);
696 ss = newbuffer + (ss - big_buffer);
697 t = newbuffer + (t - big_buffer);
698 big_buffer_size = newsize;
699 store_free(big_buffer);
700 big_buffer = newbuffer;
701 }
702
703 /* Shuffle the remaining characters up or down in the buffer before
704 copying in the replacement text. Don't rescan the replacement for this
705 same macro. */
706
707 pp = p + namelen;
708 moveby = replen - namelen;
709 if (moveby != 0)
710 {
711 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
712 newlen += moveby;
713 }
714 Ustrncpy(p, m->replacement, replen);
715 t = p + replen;
716 macro_found = TRUE;
717 }
718 }
719
720 /* An empty macro replacement at the start of a line could mean that ss no
721 longer points to the first non-blank character. */
722
723 while (isspace(*ss)) ss++;
724
725 /* Check for comment lines - these are physical lines. */
726
727 if (*ss == '#') continue;
728
729 /* Handle conditionals, which are also applied to physical lines. Conditions
730 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
731 expansion occured on the rest of the line. A preliminary test for the leading
732 '.' saves effort on most lines. */
733
734 if (*ss == '.')
735 {
736 int i;
737
738 /* Search the list of conditional directives */
739
740 for (i = 0; i < cond_list_size; i++)
741 {
742 int n;
743 cond_item *c = cond_list+i;
744 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
745
746 /* The following character must be white space or end of string */
747
748 n = ss[1 + c->namelen];
749 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
750
751 /* .ifdef and .ifndef push the current state onto the stack, then set
752 a new one from the table. Stack overflow is an error */
753
754 if (c->pushpop > 0)
755 {
756 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
757 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
758 ".%s nested too deeply", c->name);
759 cstate_stack[++cstate_stack_ptr] = cstate;
760 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
761 }
762
763 /* For any of the others, stack underflow is an error. The next state
764 comes either from the stack (.endif) or from the table. */
765
766 else
767 {
768 if (cstate_stack_ptr < 0)
769 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
770 ".%s without matching .ifdef", c->name);
771 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
772 next_cstate[cstate][macro_found? c->action1 : c->action2];
773 }
774
775 /* Having dealt with a directive, break the loop */
776
777 break;
778 }
779
780 /* If we have handled a conditional directive, continue with the next
781 physical line. Otherwise, fall through. */
782
783 if (i < cond_list_size) continue;
784 }
785
786 /* If the conditional state is not 0 (actively using these lines), ignore
787 this input line. */
788
789 if (cstate != 0) continue; /* Conditional skip */
790
791 /* Handle .include lines - these are also physical lines. */
792
793 if (Ustrncmp(ss, ".include", 8) == 0 &&
794 (isspace(ss[8]) ||
795 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
796 {
797 uschar *t;
798 int include_if_exists = isspace(ss[8])? 0 : 10;
799 config_file_item *save;
800 struct stat statbuf;
801
802 ss += 9 + include_if_exists;
803 while (isspace(*ss)) ss++;
804 t = ss + Ustrlen(ss);
805 while (t > ss && isspace(t[-1])) t--;
806 if (*ss == '\"' && t[-1] == '\"')
807 {
808 ss++;
809 t--;
810 }
811 *t = 0;
812
813 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
814
815 save = store_get(sizeof(config_file_item));
816 save->next = config_file_stack;
817 config_file_stack = save;
818 save->file = config_file;
819 save->filename = config_filename;
820 save->lineno = config_lineno;
821
822 config_file = Ufopen(ss, "rb");
823 if (config_file == NULL)
824 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
825 "configuration file %s", ss);
826 config_filename = string_copy(ss);
827 config_lineno = 0;
828 continue;
829 }
830
831 /* If this is the start of the logical line, remember where the non-blank
832 data starts. Otherwise shuffle down continuation lines to remove leading
833 white space. */
834
835 if (len == 0)
836 startoffset = ss - big_buffer;
837 else
838 {
839 s = big_buffer + len;
840 if (ss > s)
841 {
842 memmove(s, ss, (newlen - len) - (ss - s) + 1);
843 newlen -= ss - s;
844 }
845 }
846
847 /* Accept the new addition to the line. Remove trailing white space. */
848
849 len = newlen;
850 while (len > 0 && isspace(big_buffer[len-1])) len--;
851 big_buffer[len] = 0;
852
853 /* We are done if the line does not end in backslash and contains some data.
854 Empty logical lines are ignored. For continuations, remove the backslash and
855 go round the loop to read the continuation line. */
856
857 if (len > 0)
858 {
859 if (big_buffer[len-1] != '\\') break; /* End of logical line */
860 big_buffer[--len] = 0; /* Remove backslash */
861 }
862 } /* Loop for reading multiple physical lines */
863
864 /* We now have a logical line. Test for the end of a configuration section (or,
865 more accurately, for the start of the next section). Place the name of the next
866 section in next_section, and return NULL. If the name given is longer than
867 next_section, truncate it. It will be unrecognized later, because all the known
868 section names do fit. Leave space for pluralizing. */
869
870 s = big_buffer + startoffset; /* First non-space character */
871 if (strncmpic(s, US"begin ", 6) == 0)
872 {
873 s += 6;
874 while (isspace(*s)) s++;
875 if (big_buffer + len - s > sizeof(next_section) - 2)
876 s[sizeof(next_section) - 2] = 0;
877 Ustrcpy(next_section, s);
878 return NULL;
879 }
880
881 /* Return the first non-blank character. */
882
883 return s;
884 }
885
886
887
888 /*************************************************
889 * Read a name *
890 *************************************************/
891
892 /* The yield is the pointer to the next uschar. Names longer than the
893 output space are silently truncated. This function is also used from acl.c when
894 parsing ACLs.
895
896 Arguments:
897 name where to put the name
898 len length of name
899 s input pointer
900
901 Returns: new input pointer
902 */
903
904 uschar *
905 readconf_readname(uschar *name, int len, uschar *s)
906 {
907 int p = 0;
908 while (isspace(*s)) s++;
909 if (isalpha(*s))
910 {
911 while (isalnum(*s) || *s == '_')
912 {
913 if (p < len-1) name[p++] = *s;
914 s++;
915 }
916 }
917 name[p] = 0;
918 while (isspace(*s)) s++;
919 return s;
920 }
921
922
923
924
925 /*************************************************
926 * Read a time value *
927 *************************************************/
928
929 /* This function is also called from outside, to read argument
930 time values. The format of a time value is:
931
932 [<n>w][<n>d][<n>h][<n>m][<n>s]
933
934 as long as at least one is present. If a format error is encountered,
935 return a negative value. The value must be terminated by the given
936 terminator.
937
938 Arguments:
939 s input pointer
940 terminator required terminating character
941 return_msec if TRUE, allow fractional seconds and return milliseconds
942
943 Returns: the time value, or -1 on syntax error
944 value is seconds if return_msec is FALSE
945 value is milliseconds if return_msec is TRUE
946 */
947
948 int
949 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
950 {
951 int yield = 0;
952 for (;;)
953 {
954 int value, count;
955 double fraction;
956
957 if (!isdigit(*s)) return -1;
958 (void)sscanf(CS s, "%d%n", &value, &count);
959 s += count;
960
961 switch (*s)
962 {
963 case 'w': value *= 7;
964 case 'd': value *= 24;
965 case 'h': value *= 60;
966 case 'm': value *= 60;
967 case 's': s++;
968 break;
969
970 case '.':
971 if (!return_msec) return -1;
972 (void)sscanf(CS s, "%lf%n", &fraction, &count);
973 s += count;
974 if (*s++ != 's') return -1;
975 yield += (int)(fraction * 1000.0);
976 break;
977
978 default: return -1;
979 }
980
981 if (return_msec) value *= 1000;
982 yield += value;
983 if (*s == terminator) return yield;
984 }
985 /* Control never reaches here. */
986 }
987
988
989
990 /*************************************************
991 * Read a fixed point value *
992 *************************************************/
993
994 /* The value is returned *1000
995
996 Arguments:
997 s input pointer
998 terminator required terminator
999
1000 Returns: the value, or -1 on error
1001 */
1002
1003 static int
1004 readconf_readfixed(uschar *s, int terminator)
1005 {
1006 int yield = 0;
1007 int value, count;
1008 if (!isdigit(*s)) return -1;
1009 (void)sscanf(CS s, "%d%n", &value, &count);
1010 s += count;
1011 yield = value * 1000;
1012 if (*s == '.')
1013 {
1014 int m = 100;
1015 while (isdigit((*(++s))))
1016 {
1017 yield += (*s - '0') * m;
1018 m /= 10;
1019 }
1020 }
1021
1022 return (*s == terminator)? yield : (-1);
1023 }
1024
1025
1026
1027 /*************************************************
1028 * Find option in list *
1029 *************************************************/
1030
1031 /* The lists are always in order, so binary chop can be used.
1032
1033 Arguments:
1034 name the option name to search for
1035 ol the first entry in the option list
1036 last one more than the offset of the last entry in the option list
1037
1038 Returns: pointer to an option entry, or NULL if not found
1039 */
1040
1041 static optionlist *
1042 find_option(uschar *name, optionlist *ol, int last)
1043 {
1044 int first = 0;
1045 while (last > first)
1046 {
1047 int middle = (first + last)/2;
1048 int c = Ustrcmp(name, ol[middle].name);
1049 if (c == 0) return ol + middle;
1050 else if (c > 0) first = middle + 1;
1051 else last = middle;
1052 }
1053 return NULL;
1054 }
1055
1056
1057
1058 /*************************************************
1059 * Find a set flag in option list *
1060 *************************************************/
1061
1062 /* Because some versions of Unix make no restrictions on the values of uids and
1063 gids (even negative ones), we cannot represent "unset" by a special value.
1064 There is therefore a separate boolean variable for each one indicating whether
1065 a value is set or not. This function returns a pointer to the boolean, given
1066 the original option name. It is a major disaster if the flag cannot be found.
1067
1068 Arguments:
1069 name the name of the uid or gid option
1070 oltop points to the start of the relevant option list
1071 last one more than the offset of the last item in the option list
1072 data_block NULL when reading main options => data values in the option
1073 list are absolute addresses; otherwise they are byte offsets
1074 in data_block (used for driver options)
1075
1076 Returns: a pointer to the boolean flag.
1077 */
1078
1079 static BOOL *
1080 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1081 {
1082 optionlist *ol;
1083 uschar name2[64];
1084 sprintf(CS name2, "*set_%.50s", name);
1085 ol = find_option(name2, oltop, last);
1086 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1087 "Exim internal error: missing set flag for %s", name);
1088 return (data_block == NULL)? (BOOL *)(ol->value) :
1089 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1090 }
1091
1092
1093
1094
1095 /*************************************************
1096 * Output extra characters message and die *
1097 *************************************************/
1098
1099 /* Called when an option line has junk on the end. Sometimes this is because
1100 the sysadmin thinks comments are permitted.
1101
1102 Arguments:
1103 s points to the extra characters
1104 t1..t3 strings to insert in the log message
1105
1106 Returns: doesn't return; dies
1107 */
1108
1109 static void
1110 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1111 {
1112 uschar *comment = US"";
1113 if (*s == '#') comment = US" (# is comment only at line start)";
1114 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1115 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1116 }
1117
1118
1119
1120 /*************************************************
1121 * Read rewrite information *
1122 *************************************************/
1123
1124 /* Each line of rewrite information contains:
1125
1126 . A complete address in the form user@domain, possibly with
1127 leading * for each part; or alternatively, a regex.
1128
1129 . A replacement string (which will be expanded).
1130
1131 . An optional sequence of one-letter flags, indicating which
1132 headers etc. to apply this rule to.
1133
1134 All this is decoded and placed into a control block. The OR of the flags is
1135 maintained in a common word.
1136
1137 Arguments:
1138 p points to the string that makes up the rule
1139 existflags points to the overall flag word
1140 isglobal TRUE if reading global rewrite rules
1141
1142 Returns: the control block for the parsed rule.
1143 */
1144
1145 static rewrite_rule *
1146 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1147 {
1148 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1149
1150 next->next = NULL;
1151 next->key = string_dequote(&p);
1152
1153 while (isspace(*p)) p++;
1154 if (*p == 0)
1155 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1156 "missing rewrite replacement string");
1157
1158 next->flags = 0;
1159 next->replacement = string_dequote(&p);
1160
1161 while (*p != 0) switch (*p++)
1162 {
1163 case ' ': case '\t': break;
1164
1165 case 'q': next->flags |= rewrite_quit; break;
1166 case 'w': next->flags |= rewrite_whole; break;
1167
1168 case 'h': next->flags |= rewrite_all_headers; break;
1169 case 's': next->flags |= rewrite_sender; break;
1170 case 'f': next->flags |= rewrite_from; break;
1171 case 't': next->flags |= rewrite_to; break;
1172 case 'c': next->flags |= rewrite_cc; break;
1173 case 'b': next->flags |= rewrite_bcc; break;
1174 case 'r': next->flags |= rewrite_replyto; break;
1175
1176 case 'E': next->flags |= rewrite_all_envelope; break;
1177 case 'F': next->flags |= rewrite_envfrom; break;
1178 case 'T': next->flags |= rewrite_envto; break;
1179
1180 case 'Q': next->flags |= rewrite_qualify; break;
1181 case 'R': next->flags |= rewrite_repeat; break;
1182
1183 case 'S':
1184 next->flags |= rewrite_smtp;
1185 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1186 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1187 "rewrite rule has the S flag but is not a regular expression");
1188 break;
1189
1190 default:
1191 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1192 "unknown rewrite flag character '%c' "
1193 "(could be missing quotes round replacement item)", p[-1]);
1194 break;
1195 }
1196
1197 /* If no action flags are set, set all the "normal" rewrites. */
1198
1199 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1200 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1201
1202 /* Remember which exist, for optimization, and return the rule */
1203
1204 *existflags |= next->flags;
1205 return next;
1206 }
1207
1208
1209
1210
1211 /*************************************************
1212 * Read global rewrite information *
1213 *************************************************/
1214
1215 /* Each line is a single rewrite rule; it is parsed into a control block
1216 by readconf_one_rewrite(), and its flags are ORed into the global flag
1217 word rewrite_existflags. */
1218
1219 void
1220 readconf_rewrites(void)
1221 {
1222 rewrite_rule **chain = &global_rewrite_rules;
1223 uschar *p;
1224
1225 while ((p = get_config_line()) != NULL)
1226 {
1227 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1228 *chain = next;
1229 chain = &(next->next);
1230 }
1231 }
1232
1233
1234
1235 /*************************************************
1236 * Read a string *
1237 *************************************************/
1238
1239 /* Strings are read into the normal store pool. As long we aren't too
1240 near the end of the current block, the string will just use what is necessary
1241 on the top of the stacking pool, because string_cat() uses the extension
1242 mechanism.
1243
1244 Argument:
1245 s the rest of the input line
1246 name the option name (for errors)
1247
1248 Returns: pointer to the string
1249 */
1250
1251 static uschar *
1252 read_string(uschar *s, uschar *name)
1253 {
1254 uschar *yield;
1255 uschar *ss;
1256
1257 if (*s != '\"') return string_copy(s);
1258
1259 ss = s;
1260 yield = string_dequote(&s);
1261
1262 if (s == ss+1 || s[-1] != '\"')
1263 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1264 "missing quote at end of string value for %s", name);
1265
1266 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1267
1268 return yield;
1269 }
1270
1271
1272 /*************************************************
1273 * Handle option line *
1274 *************************************************/
1275
1276 /* This function is called from several places to process a line containing the
1277 setting of an option. The first argument is the line to be decoded; it has been
1278 checked not to be empty and not to start with '#'. Trailing newlines and white
1279 space have been removed. The second argument is a pointer to the list of
1280 variable names that are to be recognized, together with their types and
1281 locations, and the third argument gives the number of entries in the list.
1282
1283 The fourth argument is a pointer to a data block. If it is NULL, then the data
1284 values in the options list are absolute addresses. Otherwise, they are byte
1285 offsets in the data block.
1286
1287 String option data may continue onto several lines; this function reads further
1288 data from config_file if necessary.
1289
1290 The yield of this function is normally zero. If a string continues onto
1291 multiple lines, then the data value is permitted to be followed by a comma
1292 or a semicolon (for use in drivers) and the yield is that character.
1293
1294 Arguments:
1295 buffer contains the configuration line to be handled
1296 oltop points to the start of the relevant option list
1297 last one more than the offset of the last item in the option list
1298 data_block NULL when reading main options => data values in the option
1299 list are absolute addresses; otherwise they are byte offsets
1300 in data_block when they have opt_public set; otherwise
1301 they are byte offsets in data_block->options_block.
1302 unknown_txt format string to use in panic message for unknown option;
1303 must contain %s for option name
1304 if given as NULL, don't panic on unknown option
1305
1306 Returns: TRUE if an option was read successfully,
1307 FALSE false for an unknown option if unknown_txt == NULL,
1308 otherwise panic and die on an unknown option
1309 */
1310
1311 static BOOL
1312 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1313 void *data_block, uschar *unknown_txt)
1314 {
1315 int ptr = 0;
1316 int offset = 0;
1317 int n, count, type, value;
1318 int issecure = 0;
1319 uid_t uid;
1320 gid_t gid;
1321 BOOL boolvalue = TRUE;
1322 BOOL freesptr = TRUE;
1323 optionlist *ol, *ol2;
1324 struct passwd *pw;
1325 void *reset_point;
1326 int intbase = 0;
1327 uschar *inttype = US"";
1328 uschar *sptr;
1329 uschar *s = buffer;
1330 uschar name[64];
1331 uschar name2[64];
1332
1333 /* There may be leading spaces; thereafter, we expect an option name starting
1334 with a letter. */
1335
1336 while (isspace(*s)) s++;
1337 if (!isalpha(*s))
1338 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1339
1340 /* Read the name of the option, and skip any subsequent white space. If
1341 it turns out that what we read was "hide", set the flag indicating that
1342 this is a secure option, and loop to read the next word. */
1343
1344 for (n = 0; n < 2; n++)
1345 {
1346 while (isalnum(*s) || *s == '_')
1347 {
1348 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1349 s++;
1350 }
1351 name[ptr] = 0;
1352 while (isspace(*s)) s++;
1353 if (Ustrcmp(name, "hide") != 0) break;
1354 issecure = opt_secure;
1355 ptr = 0;
1356 }
1357
1358 /* Deal with "no_" or "not_" here for booleans */
1359
1360 if (Ustrncmp(name, "no_", 3) == 0)
1361 {
1362 boolvalue = FALSE;
1363 offset = 3;
1364 }
1365
1366 if (Ustrncmp(name, "not_", 4) == 0)
1367 {
1368 boolvalue = FALSE;
1369 offset = 4;
1370 }
1371
1372 /* Search the list for the given name. A non-existent name, or an option that
1373 is set twice, is a disaster. */
1374
1375 ol = find_option(name + offset, oltop, last);
1376
1377 if (ol == NULL)
1378 {
1379 if (unknown_txt == NULL) return FALSE;
1380 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1381 }
1382
1383 if ((ol->type & opt_set) != 0)
1384 {
1385 uschar *mname = name;
1386 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1387 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1388 "\"%s\" option set for the second time", mname);
1389 }
1390
1391 ol->type |= opt_set | issecure;
1392 type = ol->type & opt_mask;
1393
1394 /* Types with data values must be followed by '='; the "no[t]_" prefix
1395 applies only to boolean values. */
1396
1397 if (type < opt_bool || type > opt_bool_last)
1398 {
1399 if (offset != 0)
1400 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1401 "negation prefix applied to a non-boolean option");
1402 if (*s == 0)
1403 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1404 "unexpected end of line (data missing) after %s", name);
1405 if (*s != '=')
1406 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1407 }
1408
1409 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1410 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1411 ultimately expands to one of those values. */
1412
1413 else if (*s != 0 && (offset != 0 || *s != '='))
1414 extra_chars_error(s, US"boolean option ", name, US"");
1415
1416 /* Skip white space after = */
1417
1418 if (*s == '=') while (isspace((*(++s))));
1419
1420 /* If there is a data block and the opt_public flag is not set, change
1421 the data block pointer to the private options block. */
1422
1423 if (data_block != NULL && (ol->type & opt_public) == 0)
1424 data_block = (void *)(((driver_instance *)data_block)->options_block);
1425
1426 /* Now get the data according to the type. */
1427
1428 switch (type)
1429 {
1430 /* If a string value is not enclosed in quotes, it consists of
1431 the rest of the current line, verbatim. Otherwise, string escapes
1432 are processed.
1433
1434 A transport is specified as a string, which is then looked up in the
1435 list of transports. A search type is specified as one of a number of
1436 known strings.
1437
1438 A set or rewrite rules for a driver is specified as a string, which is
1439 then parsed into a suitable chain of control blocks.
1440
1441 Uids and gids are specified as strings which are then looked up in the
1442 passwd file. Lists of uids and gids are similarly specified as colon-
1443 separated strings. */
1444
1445 case opt_stringptr:
1446 case opt_uid:
1447 case opt_gid:
1448 case opt_expand_uid:
1449 case opt_expand_gid:
1450 case opt_uidlist:
1451 case opt_gidlist:
1452 case opt_rewrite:
1453
1454 reset_point = sptr = read_string(s, name);
1455
1456 /* Having read a string, we now have several different ways of using it,
1457 depending on the data type, so do another switch. If keeping the actual
1458 string is not required (because it is interpreted), freesptr is set TRUE,
1459 and at the end we reset the pool. */
1460
1461 switch (type)
1462 {
1463 /* If this was a string, set the variable to point to the new string,
1464 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1465 rules, we still keep the string (for printing), and parse the rules into a
1466 control block and flags word. */
1467
1468 case opt_stringptr:
1469 case opt_rewrite:
1470 if (data_block == NULL)
1471 *((uschar **)(ol->value)) = sptr;
1472 else
1473 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1474 freesptr = FALSE;
1475 if (type == opt_rewrite)
1476 {
1477 int sep = 0;
1478 int *flagptr;
1479 uschar *p = sptr;
1480 rewrite_rule **chain;
1481 optionlist *ol3;
1482
1483 sprintf(CS name2, "*%.50s_rules", name);
1484 ol2 = find_option(name2, oltop, last);
1485 sprintf(CS name2, "*%.50s_flags", name);
1486 ol3 = find_option(name2, oltop, last);
1487
1488 if (ol2 == NULL || ol3 == NULL)
1489 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1490 "rewrite rules not available for driver");
1491
1492 if (data_block == NULL)
1493 {
1494 chain = (rewrite_rule **)(ol2->value);
1495 flagptr = (int *)(ol3->value);
1496 }
1497 else
1498 {
1499 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1500 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1501 }
1502
1503 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1504 != NULL)
1505 {
1506 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1507 *chain = next;
1508 chain = &(next->next);
1509 }
1510
1511 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1512 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1513 "non-header rewrite - not allowed at transport time -");
1514 }
1515 break;
1516
1517 /* If it was an expanded uid, see if there is any expansion to be
1518 done by checking for the presence of a $ character. If there is, save it
1519 in the corresponding *expand_user option field. Otherwise, fall through
1520 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1521 of data. */
1522
1523 case opt_expand_uid:
1524 sprintf(CS name2, "*expand_%.50s", name);
1525 ol2 = find_option(name2, oltop, last);
1526 if (ol2 != NULL)
1527 {
1528 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1529
1530 if (data_block == NULL)
1531 *((uschar **)(ol2->value)) = ss;
1532 else
1533 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1534
1535 if (ss != NULL)
1536 {
1537 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1538 freesptr = FALSE;
1539 break;
1540 }
1541 }
1542
1543 /* Look up a fixed uid, and also make use of the corresponding gid
1544 if a passwd entry is returned and the gid has not been set. */
1545
1546 case opt_uid:
1547 if (!route_finduser(sptr, &pw, &uid))
1548 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1549 if (data_block == NULL)
1550 *((uid_t *)(ol->value)) = uid;
1551 else
1552 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1553
1554 /* Set the flag indicating a fixed value is set */
1555
1556 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1557
1558 /* Handle matching gid if we have a passwd entry: done by finding the
1559 same name with terminating "user" changed to "group"; if not found,
1560 ignore. Also ignore if the value is already set. */
1561
1562 if (pw == NULL) break;
1563 Ustrcpy(name+Ustrlen(name)-4, "group");
1564 ol2 = find_option(name, oltop, last);
1565 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1566 (ol2->type & opt_mask) == opt_expand_gid))
1567 {
1568 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1569 if (! *set_flag)
1570 {
1571 if (data_block == NULL)
1572 *((gid_t *)(ol2->value)) = pw->pw_gid;
1573 else
1574 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1575 *set_flag = TRUE;
1576 }
1577 }
1578 break;
1579
1580 /* If it was an expanded gid, see if there is any expansion to be
1581 done by checking for the presence of a $ character. If there is, save it
1582 in the corresponding *expand_user option field. Otherwise, fall through
1583 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1584 of data. */
1585
1586 case opt_expand_gid:
1587 sprintf(CS name2, "*expand_%.50s", name);
1588 ol2 = find_option(name2, oltop, last);
1589 if (ol2 != NULL)
1590 {
1591 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1592
1593 if (data_block == NULL)
1594 *((uschar **)(ol2->value)) = ss;
1595 else
1596 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1597
1598 if (ss != NULL)
1599 {
1600 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1601 freesptr = FALSE;
1602 break;
1603 }
1604 }
1605
1606 /* Handle freestanding gid */
1607
1608 case opt_gid:
1609 if (!route_findgroup(sptr, &gid))
1610 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1611 if (data_block == NULL)
1612 *((gid_t *)(ol->value)) = gid;
1613 else
1614 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1615 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1616 break;
1617
1618 /* If it was a uid list, look up each individual entry, and build
1619 a vector of uids, with a count in the first element. Put the vector
1620 in malloc store so we can free the string. (We are reading into
1621 permanent store already.) */
1622
1623 case opt_uidlist:
1624 {
1625 int count = 1;
1626 uid_t *list;
1627 int ptr = 0;
1628 uschar *p;
1629 uschar *op = expand_string (sptr);
1630
1631 if (op == NULL)
1632 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1633 name, expand_string_message);
1634
1635 p = op;
1636 if (*p != 0) count++;
1637 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1638 list = store_malloc(count*sizeof(uid_t));
1639 list[ptr++] = (uid_t)(count - 1);
1640
1641 if (data_block == NULL)
1642 *((uid_t **)(ol->value)) = list;
1643 else
1644 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1645
1646 p = op;
1647 while (count-- > 1)
1648 {
1649 int sep = 0;
1650 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1651 if (!route_finduser(big_buffer, NULL, &uid))
1652 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1653 big_buffer);
1654 list[ptr++] = uid;
1655 }
1656 }
1657 break;
1658
1659 /* If it was a gid list, look up each individual entry, and build
1660 a vector of gids, with a count in the first element. Put the vector
1661 in malloc store so we can free the string. (We are reading into permanent
1662 store already.) */
1663
1664 case opt_gidlist:
1665 {
1666 int count = 1;
1667 gid_t *list;
1668 int ptr = 0;
1669 uschar *p;
1670 uschar *op = expand_string (sptr);
1671
1672 if (op == NULL)
1673 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1674 name, expand_string_message);
1675
1676 p = op;
1677 if (*p != 0) count++;
1678 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1679 list = store_malloc(count*sizeof(gid_t));
1680 list[ptr++] = (gid_t)(count - 1);
1681
1682 if (data_block == NULL)
1683 *((gid_t **)(ol->value)) = list;
1684 else
1685 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1686
1687 p = op;
1688 while (count-- > 1)
1689 {
1690 int sep = 0;
1691 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1692 if (!route_findgroup(big_buffer, &gid))
1693 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1694 big_buffer);
1695 list[ptr++] = gid;
1696 }
1697 }
1698 break;
1699 }
1700
1701 /* Release store if the value of the string doesn't need to be kept. */
1702
1703 if (freesptr) store_reset(reset_point);
1704 break;
1705
1706 /* Expanded boolean: if no characters follow, or if there are no dollar
1707 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1708 save the string for later expansion in the alternate place. */
1709
1710 case opt_expand_bool:
1711 if (*s != 0 && Ustrchr(s, '$') != 0)
1712 {
1713 sprintf(CS name2, "*expand_%.50s", name);
1714 ol2 = find_option(name2, oltop, last);
1715 if (ol2 != NULL)
1716 {
1717 reset_point = sptr = read_string(s, name);
1718 if (data_block == NULL)
1719 *((uschar **)(ol2->value)) = sptr;
1720 else
1721 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1722 freesptr = FALSE;
1723 break;
1724 }
1725 }
1726 /* Fall through */
1727
1728 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1729 look for yes/not/true/false. Some booleans are stored in a single bit in
1730 a single int. There's a special fudge for verify settings; without a suffix
1731 they set both xx_sender and xx_recipient. The table points to the sender
1732 value; search subsequently for the recipient. There's another special case:
1733 opt_bool_set also notes when a boolean has been set. */
1734
1735 case opt_bool:
1736 case opt_bit:
1737 case opt_bool_verify:
1738 case opt_bool_set:
1739 if (*s != 0)
1740 {
1741 s = readconf_readname(name2, 64, s);
1742 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1743 boolvalue = TRUE;
1744 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1745 boolvalue = FALSE;
1746 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1747 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1748 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1749 US"for boolean option ", name);
1750 }
1751
1752 /* Handle single-bit type. */
1753
1754 if (type == opt_bit)
1755 {
1756 int bit = 1 << ((ol->type >> 16) & 31);
1757 int *ptr = (data_block == NULL)?
1758 (int *)(ol->value) :
1759 (int *)((uschar *)data_block + (long int)ol->value);
1760 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1761 break;
1762 }
1763
1764 /* Handle full BOOL types */
1765
1766 if (data_block == NULL)
1767 *((BOOL *)(ol->value)) = boolvalue;
1768 else
1769 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1770
1771 /* Verify fudge */
1772
1773 if (type == opt_bool_verify)
1774 {
1775 sprintf(CS name2, "%.50s_recipient", name + offset);
1776 ol2 = find_option(name2, oltop, last);
1777 if (ol2 != NULL)
1778 {
1779 if (data_block == NULL)
1780 *((BOOL *)(ol2->value)) = boolvalue;
1781 else
1782 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1783 }
1784 }
1785
1786 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1787
1788 else if (type == opt_bool_set)
1789 {
1790 sprintf(CS name2, "*set_%.50s", name + offset);
1791 ol2 = find_option(name2, oltop, last);
1792 if (ol2 != NULL)
1793 {
1794 if (data_block == NULL)
1795 *((BOOL *)(ol2->value)) = TRUE;
1796 else
1797 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1798 }
1799 }
1800 break;
1801
1802 /* Octal integer */
1803
1804 case opt_octint:
1805 intbase = 8;
1806 inttype = US"octal ";
1807
1808 /* Integer: a simple(ish) case; allow octal and hex formats, and
1809 suffixes K and M. The different types affect output, not input. */
1810
1811 case opt_mkint:
1812 case opt_int:
1813 {
1814 uschar *endptr;
1815 errno = 0;
1816 value = strtol(CS s, CSS &endptr, intbase);
1817
1818 if (endptr == s)
1819 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1820 inttype, name);
1821
1822 if (errno != ERANGE)
1823 {
1824 if (tolower(*endptr) == 'k')
1825 {
1826 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1827 else value *= 1024;
1828 endptr++;
1829 }
1830 else if (tolower(*endptr) == 'm')
1831 {
1832 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1833 errno = ERANGE;
1834 else value *= 1024*1024;
1835 endptr++;
1836 }
1837 }
1838
1839 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1840 "absolute value of integer \"%s\" is too large (overflow)", s);
1841
1842 while (isspace(*endptr)) endptr++;
1843 if (*endptr != 0)
1844 extra_chars_error(endptr, inttype, US"integer value for ", name);
1845 }
1846
1847 if (data_block == NULL)
1848 *((int *)(ol->value)) = value;
1849 else
1850 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1851 break;
1852
1853 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1854 M. */
1855
1856 case opt_Kint:
1857 {
1858 uschar *endptr;
1859 errno = 0;
1860 value = strtol(CS s, CSS &endptr, intbase);
1861
1862 if (endptr == s)
1863 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1864 inttype, name);
1865
1866 if (errno != ERANGE)
1867 {
1868 if (tolower(*endptr) == 'm')
1869 {
1870 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1871 else value *= 1024;
1872 endptr++;
1873 }
1874 else if (tolower(*endptr) == 'k')
1875 {
1876 endptr++;
1877 }
1878 else
1879 {
1880 value = (value + 512)/1024;
1881 }
1882 }
1883
1884 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1885 "absolute value of integer \"%s\" is too large (overflow)", s);
1886
1887 while (isspace(*endptr)) endptr++;
1888 if (*endptr != 0)
1889 extra_chars_error(endptr, inttype, US"integer value for ", name);
1890 }
1891
1892 if (data_block == NULL)
1893 *((int *)(ol->value)) = value;
1894 else
1895 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1896 break;
1897
1898 /* Fixed-point number: held to 3 decimal places. */
1899
1900 case opt_fixed:
1901 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1902 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1903 "fixed-point number expected for %s", name);
1904
1905 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1906 "integer \"%s\" is too large (overflow)", s);
1907
1908 value *= 1000;
1909
1910 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1911 "integer \"%s\" is too large (overflow)", s);
1912
1913 if (s[count] == '.')
1914 {
1915 int d = 100;
1916 while (isdigit(s[++count]))
1917 {
1918 value += (s[count] - '0') * d;
1919 d /= 10;
1920 }
1921 }
1922
1923 while (isspace(s[count])) count++;
1924
1925 if (s[count] != 0)
1926 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1927
1928 if (data_block == NULL)
1929 *((int *)(ol->value)) = value;
1930 else
1931 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1932 break;
1933
1934 /* There's a special routine to read time values. */
1935
1936 case opt_time:
1937 value = readconf_readtime(s, 0, FALSE);
1938 if (value < 0)
1939 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1940 name);
1941 if (data_block == NULL)
1942 *((int *)(ol->value)) = value;
1943 else
1944 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1945 break;
1946
1947 /* A time list is a list of colon-separated times, with the first
1948 element holding the size of the list and the second the number of
1949 entries used. */
1950
1951 case opt_timelist:
1952 {
1953 int count = 0;
1954 int *list = (data_block == NULL)?
1955 (int *)(ol->value) :
1956 (int *)((uschar *)data_block + (long int)(ol->value));
1957
1958 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1959 {
1960 int terminator = 0;
1961 uschar *snext = Ustrchr(s, ':');
1962 if (snext != NULL)
1963 {
1964 uschar *ss = snext;
1965 while (ss > s && isspace(ss[-1])) ss--;
1966 terminator = *ss;
1967 }
1968 value = readconf_readtime(s, terminator, FALSE);
1969 if (value < 0)
1970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1971 name);
1972 if (count > 1 && value <= list[count])
1973 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1974 "time value out of order for %s", name);
1975 list[count+1] = value;
1976 if (snext == NULL) break;
1977 s = snext + 1;
1978 while (isspace(*s)) s++;
1979 }
1980
1981 if (count > list[0] - 2)
1982 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1983 name);
1984 if (count > 0 && list[2] == 0) count = 0;
1985 list[1] = count;
1986 }
1987
1988 break;
1989 }
1990
1991 return TRUE;
1992 }
1993
1994
1995
1996 /*************************************************
1997 * Print a time value *
1998 *************************************************/
1999
2000 /*
2001 Argument: a time value in seconds
2002 Returns: pointer to a fixed buffer containing the time as a string,
2003 in readconf_readtime() format
2004 */
2005
2006 uschar *
2007 readconf_printtime(int t)
2008 {
2009 int s, m, h, d, w;
2010 uschar *p = time_buffer;
2011
2012 s = t % 60;
2013 t /= 60;
2014 m = t % 60;
2015 t /= 60;
2016 h = t % 24;
2017 t /= 24;
2018 d = t % 7;
2019 w = t/7;
2020
2021 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2022 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2023 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2024 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2025 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2026
2027 return time_buffer;
2028 }
2029
2030
2031
2032 /*************************************************
2033 * Print an individual option value *
2034 *************************************************/
2035
2036 /* This is used by the -bP option, so prints to the standard output.
2037 The entire options list is passed in as an argument, because some options come
2038 in pairs - typically uid/gid settings, which can either be explicit numerical
2039 values, or strings to be expanded later. If the numerical value is unset,
2040 search for "*expand_<name>" to see if there is a string equivalent.
2041
2042 Arguments:
2043 ol option entry, or NULL for an unknown option
2044 name option name
2045 options_block NULL for main configuration options; otherwise points to
2046 a driver block; if the option doesn't have opt_public
2047 set, then options_block->options_block is where the item
2048 resides.
2049 oltop points to the option list in which ol exists
2050 last one more than the offset of the last entry in optop
2051
2052 Returns: nothing
2053 */
2054
2055 static void
2056 print_ol(optionlist *ol, uschar *name, void *options_block,
2057 optionlist *oltop, int last)
2058 {
2059 struct passwd *pw;
2060 struct group *gr;
2061 optionlist *ol2;
2062 void *value;
2063 uid_t *uidlist;
2064 gid_t *gidlist;
2065 uschar *s;
2066 uschar name2[64];
2067
2068 if (ol == NULL)
2069 {
2070 printf("%s is not a known option\n", name);
2071 return;
2072 }
2073
2074 /* Non-admin callers cannot see options that have been flagged secure by the
2075 "hide" prefix. */
2076
2077 if (!admin_user && (ol->type & opt_secure) != 0)
2078 {
2079 printf("%s = <value not displayable>\n", name);
2080 return;
2081 }
2082
2083 /* Else show the value of the option */
2084
2085 value = ol->value;
2086 if (options_block != NULL)
2087 {
2088 if ((ol->type & opt_public) == 0)
2089 options_block = (void *)(((driver_instance *)options_block)->options_block);
2090 value = (void *)((uschar *)options_block + (long int)value);
2091 }
2092
2093 switch(ol->type & opt_mask)
2094 {
2095 case opt_stringptr:
2096 case opt_rewrite: /* Show the text value */
2097 s = *((uschar **)value);
2098 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2099 break;
2100
2101 case opt_int:
2102 printf("%s = %d\n", name, *((int *)value));
2103 break;
2104
2105 case opt_mkint:
2106 {
2107 int x = *((int *)value);
2108 if (x != 0 && (x & 1023) == 0)
2109 {
2110 int c = 'K';
2111 x >>= 10;
2112 if ((x & 1023) == 0)
2113 {
2114 c = 'M';
2115 x >>= 10;
2116 }
2117 printf("%s = %d%c\n", name, x, c);
2118 }
2119 else printf("%s = %d\n", name, x);
2120 }
2121 break;
2122
2123 case opt_Kint:
2124 {
2125 int x = *((int *)value);
2126 if (x == 0) printf("%s = 0\n", name);
2127 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2128 else printf("%s = %dK\n", name, x);
2129 }
2130 break;
2131
2132 case opt_octint:
2133 printf("%s = %#o\n", name, *((int *)value));
2134 break;
2135
2136 /* Can be negative only when "unset", in which case integer */
2137
2138 case opt_fixed:
2139 {
2140 int x = *((int *)value);
2141 int f = x % 1000;
2142 int d = 100;
2143 if (x < 0) printf("%s =\n", name); else
2144 {
2145 printf("%s = %d.", name, x/1000);
2146 do
2147 {
2148 printf("%d", f/d);
2149 f %= d;
2150 d /= 10;
2151 }
2152 while (f != 0);
2153 printf("\n");
2154 }
2155 }
2156 break;
2157
2158 /* If the numerical value is unset, try for the string value */
2159
2160 case opt_expand_uid:
2161 if (! *get_set_flag(name, oltop, last, options_block))
2162 {
2163 sprintf(CS name2, "*expand_%.50s", name);
2164 ol2 = find_option(name2, oltop, last);
2165 if (ol2 != NULL)
2166 {
2167 void *value2 = ol2->value;
2168 if (options_block != NULL)
2169 value2 = (void *)((uschar *)options_block + (long int)value2);
2170 s = *((uschar **)value2);
2171 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2172 break;
2173 }
2174 }
2175
2176 /* Else fall through */
2177
2178 case opt_uid:
2179 if (! *get_set_flag(name, oltop, last, options_block))
2180 printf("%s =\n", name);
2181 else
2182 {
2183 pw = getpwuid(*((uid_t *)value));
2184 if (pw == NULL)
2185 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2186 else printf("%s = %s\n", name, pw->pw_name);
2187 }
2188 break;
2189
2190 /* If the numerical value is unset, try for the string value */
2191
2192 case opt_expand_gid:
2193 if (! *get_set_flag(name, oltop, last, options_block))
2194 {
2195 sprintf(CS name2, "*expand_%.50s", name);
2196 ol2 = find_option(name2, oltop, last);
2197 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2198 {
2199 void *value2 = ol2->value;
2200 if (options_block != NULL)
2201 value2 = (void *)((uschar *)options_block + (long int)value2);
2202 s = *((uschar **)value2);
2203 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2204 break;
2205 }
2206 }
2207
2208 /* Else fall through */
2209
2210 case opt_gid:
2211 if (! *get_set_flag(name, oltop, last, options_block))
2212 printf("%s =\n", name);
2213 else
2214 {
2215 gr = getgrgid(*((int *)value));
2216 if (gr == NULL)
2217 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2218 else printf("%s = %s\n", name, gr->gr_name);
2219 }
2220 break;
2221
2222 case opt_uidlist:
2223 uidlist = *((uid_t **)value);
2224 printf("%s =", name);
2225 if (uidlist != NULL)
2226 {
2227 int i;
2228 uschar sep = ' ';
2229 for (i = 1; i <= (int)(uidlist[0]); i++)
2230 {
2231 uschar *name = NULL;
2232 pw = getpwuid(uidlist[i]);
2233 if (pw != NULL) name = US pw->pw_name;
2234 if (name != NULL) printf("%c%s", sep, name);
2235 else printf("%c%ld", sep, (long int)(uidlist[i]));
2236 sep = ':';
2237 }
2238 }
2239 printf("\n");
2240 break;
2241
2242 case opt_gidlist:
2243 gidlist = *((gid_t **)value);
2244 printf("%s =", name);
2245 if (gidlist != NULL)
2246 {
2247 int i;
2248 uschar sep = ' ';
2249 for (i = 1; i <= (int)(gidlist[0]); i++)
2250 {
2251 uschar *name = NULL;
2252 gr = getgrgid(gidlist[i]);
2253 if (gr != NULL) name = US gr->gr_name;
2254 if (name != NULL) printf("%c%s", sep, name);
2255 else printf("%c%ld", sep, (long int)(gidlist[i]));
2256 sep = ':';
2257 }
2258 }
2259 printf("\n");
2260 break;
2261
2262 case opt_time:
2263 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2264 break;
2265
2266 case opt_timelist:
2267 {
2268 int i;
2269 int *list = (int *)value;
2270 printf("%s = ", name);
2271 for (i = 0; i < list[1]; i++)
2272 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2273 printf("\n");
2274 }
2275 break;
2276
2277 case opt_bit:
2278 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2279 "" : "no_", name);
2280 break;
2281
2282 case opt_expand_bool:
2283 sprintf(CS name2, "*expand_%.50s", name);
2284 ol2 = find_option(name2, oltop, last);
2285 if (ol2 != NULL && ol2->value != NULL)
2286 {
2287 void *value2 = ol2->value;
2288 if (options_block != NULL)
2289 value2 = (void *)((uschar *)options_block + (long int)value2);
2290 s = *((uschar **)value2);
2291 if (s != NULL)
2292 {
2293 printf("%s = %s\n", name, string_printing(s));
2294 break;
2295 }
2296 /* s == NULL => string not set; fall through */
2297 }
2298
2299 /* Fall through */
2300
2301 case opt_bool:
2302 case opt_bool_verify:
2303 case opt_bool_set:
2304 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2305 break;
2306 }
2307 }
2308
2309
2310
2311 /*************************************************
2312 * Print value from main configuration *
2313 *************************************************/
2314
2315 /* This function, called as a result of encountering the -bP option,
2316 causes the value of any main configuration variable to be output if the
2317 second argument is NULL. There are some special values:
2318
2319 all print all main configuration options
2320 configure_file print the name of the configuration file
2321 routers print the routers' configurations
2322 transports print the transports' configuration
2323 authenticators print the authenticators' configuration
2324 router_list print a list of router names
2325 transport_list print a list of transport names
2326 authenticator_list print a list of authentication mechanism names
2327 +name print a named list item
2328 local_scan print the local_scan options
2329
2330 If the second argument is not NULL, it must be one of "router", "transport", or
2331 "authenticator" in which case the first argument identifies the driver whose
2332 options are to be printed.
2333
2334 Arguments:
2335 name option name if type == NULL; else driver name
2336 type NULL or driver type name, as described above
2337
2338 Returns: nothing
2339 */
2340
2341 void
2342 readconf_print(uschar *name, uschar *type)
2343 {
2344 BOOL names_only = FALSE;
2345 optionlist *ol;
2346 optionlist *ol2 = NULL;
2347 driver_instance *d = NULL;
2348 int size = 0;
2349
2350 if (type == NULL)
2351 {
2352 if (*name == '+')
2353 {
2354 int i;
2355 tree_node *t;
2356 BOOL found = FALSE;
2357 static uschar *types[] = { US"address", US"domain", US"host",
2358 US"localpart" };
2359 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2360 &hostlist_anchor, &localpartlist_anchor };
2361
2362 for (i = 0; i < 4; i++)
2363 {
2364 t = tree_search(*(anchors[i]), name+1);
2365 if (t != NULL)
2366 {
2367 found = TRUE;
2368 printf("%slist %s = %s\n", types[i], name+1,
2369 ((namedlist_block *)(t->data.ptr))->string);
2370 }
2371 }
2372
2373 if (!found)
2374 printf("no address, domain, host, or local part list called \"%s\" "
2375 "exists\n", name+1);
2376
2377 return;
2378 }
2379
2380 if (Ustrcmp(name, "configure_file") == 0)
2381 {
2382 printf("%s\n", CS config_main_filename);
2383 return;
2384 }
2385
2386 if (Ustrcmp(name, "all") == 0)
2387 {
2388 for (ol = optionlist_config;
2389 ol < optionlist_config + optionlist_config_size; ol++)
2390 {
2391 if ((ol->type & opt_hidden) == 0)
2392 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2393 }
2394 return;
2395 }
2396
2397 if (Ustrcmp(name, "local_scan") == 0)
2398 {
2399 #ifndef LOCAL_SCAN_HAS_OPTIONS
2400 printf("local_scan() options are not supported\n");
2401 #else
2402 for (ol = local_scan_options;
2403 ol < local_scan_options + local_scan_options_count; ol++)
2404 {
2405 print_ol(ol, US ol->name, NULL, local_scan_options,
2406 local_scan_options_count);
2407 }
2408 #endif
2409 return;
2410 }
2411
2412 if (Ustrcmp(name, "routers") == 0)
2413 {
2414 type = US"router";
2415 name = NULL;
2416 }
2417 else if (Ustrcmp(name, "transports") == 0)
2418 {
2419 type = US"transport";
2420 name = NULL;
2421 }
2422
2423 else if (Ustrcmp(name, "authenticators") == 0)
2424 {
2425 type = US"authenticator";
2426 name = NULL;
2427 }
2428
2429 else if (Ustrcmp(name, "authenticator_list") == 0)
2430 {
2431 type = US"authenticator";
2432 name = NULL;
2433 names_only = TRUE;
2434 }
2435
2436 else if (Ustrcmp(name, "router_list") == 0)
2437 {
2438 type = US"router";
2439 name = NULL;
2440 names_only = TRUE;
2441 }
2442 else if (Ustrcmp(name, "transport_list") == 0)
2443 {
2444 type = US"transport";
2445 name = NULL;
2446 names_only = TRUE;
2447 }
2448 else
2449 {
2450 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2451 name, NULL, optionlist_config, optionlist_config_size);
2452 return;
2453 }
2454 }
2455
2456 /* Handle the options for a router or transport. Skip options that are flagged
2457 as hidden. Some of these are options with names starting with '*', used for
2458 internal alternative representations of other options (which the printing
2459 function will sort out). Others are synonyms kept for backward compatibility.
2460 */
2461
2462 if (Ustrcmp(type, "router") == 0)
2463 {
2464 d = (driver_instance *)routers;
2465 ol2 = optionlist_routers;
2466 size = optionlist_routers_size;
2467 }
2468 else if (Ustrcmp(type, "transport") == 0)
2469 {
2470 d = (driver_instance *)transports;
2471 ol2 = optionlist_transports;
2472 size = optionlist_transports_size;
2473 }
2474 else if (Ustrcmp(type, "authenticator") == 0)
2475 {
2476 d = (driver_instance *)auths;
2477 ol2 = optionlist_auths;
2478 size = optionlist_auths_size;
2479 }
2480
2481 if (names_only)
2482 {
2483 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2484 return;
2485 }
2486
2487 /* Either search for a given driver, or print all of them */
2488
2489 for (; d != NULL; d = d->next)
2490 {
2491 if (name == NULL)
2492 printf("\n%s %s:\n", d->name, type);
2493 else if (Ustrcmp(d->name, name) != 0) continue;
2494
2495 for (ol = ol2; ol < ol2 + size; ol++)
2496 {
2497 if ((ol->type & opt_hidden) == 0)
2498 print_ol(ol, US ol->name, d, ol2, size);
2499 }
2500
2501 for (ol = d->info->options;
2502 ol < d->info->options + *(d->info->options_count); ol++)
2503 {
2504 if ((ol->type & opt_hidden) == 0)
2505 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2506 }
2507 if (name != NULL) return;
2508 }
2509 if (name != NULL) printf("%s %s not found\n", type, name);
2510 }
2511
2512
2513
2514 /*************************************************
2515 * Read a named list item *
2516 *************************************************/
2517
2518 /* This function reads a name and a list (i.e. string). The name is used to
2519 save the list in a tree, sorted by its name. Each entry also has a number,
2520 which can be used for caching tests, but if the string contains any expansion
2521 items other than $key, the number is set negative to inhibit caching. This
2522 mechanism is used for domain, host, and address lists that are referenced by
2523 the "+name" syntax.
2524
2525 Arguments:
2526 anchorp points to the tree anchor
2527 numberp points to the current number for this tree
2528 max the maximum number permitted
2529 s the text of the option line, starting immediately after the name
2530 of the list type
2531 tname the name of the list type, for messages
2532
2533 Returns: nothing
2534 */
2535
2536 static void
2537 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2538 uschar *tname)
2539 {
2540 BOOL forcecache = FALSE;
2541 uschar *ss;
2542 tree_node *t;
2543 namedlist_block *nb = store_get(sizeof(namedlist_block));
2544
2545 if (Ustrncmp(s, "_cache", 6) == 0)
2546 {
2547 forcecache = TRUE;
2548 s += 6;
2549 }
2550
2551 if (!isspace(*s))
2552 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2553
2554 if (*numberp >= max)
2555 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2556 tname, max);
2557
2558 while (isspace(*s)) s++;
2559 ss = s;
2560 while (isalnum(*s) || *s == '_') s++;
2561 t = store_get(sizeof(tree_node) + s-ss);
2562 Ustrncpy(t->name, ss, s-ss);
2563 t->name[s-ss] = 0;
2564 while (isspace(*s)) s++;
2565
2566 if (!tree_insertnode(anchorp, t))
2567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2568 "duplicate name \"%s\" for a named %s", t->name, tname);
2569
2570 t->data.ptr = nb;
2571 nb->number = *numberp;
2572 *numberp += 1;
2573
2574 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2575 "missing '=' after \"%s\"", t->name);
2576 while (isspace(*s)) s++;
2577 nb->string = read_string(s, t->name);
2578 nb->cache_data = NULL;
2579
2580 /* Check the string for any expansions; if any are found, mark this list
2581 uncacheable unless the user has explicited forced caching. */
2582
2583 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2584 }
2585
2586
2587
2588
2589 /*************************************************
2590 * Unpick data for a rate limit *
2591 *************************************************/
2592
2593 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2594 separate values.
2595
2596 Arguments:
2597 s string, in the form t,b,f,l
2598 where t is the threshold (integer)
2599 b is the initial delay (time)
2600 f is the multiplicative factor (fixed point)
2601 k is the maximum time (time)
2602 threshold where to store threshold
2603 base where to store base in milliseconds
2604 factor where to store factor in milliseconds
2605 limit where to store limit
2606
2607 Returns: nothing (panics on error)
2608 */
2609
2610 static void
2611 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2612 int *limit)
2613 {
2614 uschar bstring[16], lstring[16];
2615
2616 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2617 factor, lstring) == 4)
2618 {
2619 *base = readconf_readtime(bstring, 0, TRUE);
2620 *limit = readconf_readtime(lstring, 0, TRUE);
2621 if (*base >= 0 && *limit >= 0) return;
2622 }
2623 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2624 }
2625
2626
2627
2628
2629 /*************************************************
2630 * Read main configuration options *
2631 *************************************************/
2632
2633 /* This function is the first to be called for configuration reading. It
2634 opens the configuration file and reads general configuration settings until
2635 it reaches the end of the configuration section. The file is then left open so
2636 that the remaining configuration data can subsequently be read if needed for
2637 this run of Exim.
2638
2639 The configuration file must be owned either by root or exim, and be writeable
2640 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2641 in the config file, so the test is done on the compiled in values. A slight
2642 anomaly, to be carefully documented.
2643
2644 The name of the configuration file is taken from a list that is included in the
2645 binary of Exim. It can be altered from the command line, but if that is done,
2646 root privilege is immediately withdrawn unless the caller is root or exim.
2647 The first file on the list that exists is used.
2648
2649 For use on multiple systems that share file systems, first look for a
2650 configuration file whose name has the current node name on the end. If that is
2651 not found, try the generic name. For really contorted configurations, that run
2652 multiple Exims with different uid settings, first try adding the effective uid
2653 before the node name. These complications are going to waste resources on most
2654 systems. Therefore they are available only when requested by compile-time
2655 options. */
2656
2657 void
2658 readconf_main(void)
2659 {
2660 int sep = 0;
2661 struct stat statbuf;
2662 uschar *s, *filename;
2663 uschar *list = config_main_filelist;
2664
2665 /* Loop through the possible file names */
2666
2667 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2668 != NULL)
2669 {
2670 /* Cut out all the fancy processing unless specifically wanted */
2671
2672 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2673 uschar *suffix = filename + Ustrlen(filename);
2674
2675 /* Try for the node-specific file if a node name exists */
2676
2677 #ifdef CONFIGURE_FILE_USE_NODE
2678 struct utsname uts;
2679 if (uname(&uts) >= 0)
2680 {
2681 #ifdef CONFIGURE_FILE_USE_EUID
2682 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2683 config_file = Ufopen(filename, "rb");
2684 if (config_file == NULL)
2685 #endif /* CONFIGURE_FILE_USE_EUID */
2686 {
2687 sprintf(CS suffix, ".%.256s", uts.nodename);
2688 config_file = Ufopen(filename, "rb");
2689 }
2690 }
2691 #endif /* CONFIGURE_FILE_USE_NODE */
2692
2693 /* Otherwise, try the generic name, possibly with the euid added */
2694
2695 #ifdef CONFIGURE_FILE_USE_EUID
2696 if (config_file == NULL)
2697 {
2698 sprintf(CS suffix, ".%ld", (long int)original_euid);
2699 config_file = Ufopen(filename, "rb");
2700 }
2701 #endif /* CONFIGURE_FILE_USE_EUID */
2702
2703 /* Finally, try the unadorned name */
2704
2705 if (config_file == NULL)
2706 {
2707 *suffix = 0;
2708 config_file = Ufopen(filename, "rb");
2709 }
2710 #else /* if neither defined */
2711
2712 /* This is the common case when the fancy processing is not included. */
2713
2714 config_file = Ufopen(filename, "rb");
2715 #endif
2716
2717 /* If the file does not exist, continue to try any others. For any other
2718 error, break out (and die). */
2719
2720 if (config_file != NULL || errno != ENOENT) break;
2721 }
2722
2723 /* On success, save the name for verification; config_filename is used when
2724 logging configuration errors (it changes for .included files) whereas
2725 config_main_filename is the name shown by -bP. Failure to open a configuration
2726 file is a serious disaster. */
2727
2728 if (config_file != NULL)
2729 {
2730 config_filename = config_main_filename = string_copy(filename);
2731 }
2732 else
2733 {
2734 if (filename == NULL)
2735 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2736 "%s", config_main_filelist);
2737 else
2738 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2739 "configuration file %s", filename));
2740 }
2741
2742 /* Check the status of the file we have opened, unless it was specified on
2743 the command line, in which case privilege was given away at the start. */
2744
2745 if (!config_changed)
2746 {
2747 if (fstat(fileno(config_file), &statbuf) != 0)
2748 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2749 big_buffer);
2750
2751 if ((statbuf.st_uid != root_uid && /* owner not root */
2752 statbuf.st_uid != exim_uid /* owner not exim */
2753 #ifdef CONFIGURE_OWNER
2754 && statbuf.st_uid != config_uid /* owner not the special one */
2755 #endif
2756 ) || /* or */
2757 (statbuf.st_gid != exim_gid /* group not exim & */
2758 #ifdef CONFIGURE_GROUP
2759 && statbuf.st_gid != config_gid /* group not the special one */
2760 #endif
2761 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2762 /* or */
2763 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2764
2765 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2766 "wrong owner, group, or mode", big_buffer);
2767 }
2768
2769 /* Process the main configuration settings. They all begin with a lower case
2770 letter. If we see something starting with an upper case letter, it is taken as
2771 a macro definition. */
2772
2773 while ((s = get_config_line()) != NULL)
2774 {
2775 if (isupper(s[0])) read_macro_assignment(s);
2776
2777 else if (Ustrncmp(s, "domainlist", 10) == 0)
2778 read_named_list(&domainlist_anchor, &domainlist_count,
2779 MAX_NAMED_LIST, s+10, US"domain list");
2780
2781 else if (Ustrncmp(s, "hostlist", 8) == 0)
2782 read_named_list(&hostlist_anchor, &hostlist_count,
2783 MAX_NAMED_LIST, s+8, US"host list");
2784
2785 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2786 read_named_list(&addresslist_anchor, &addresslist_count,
2787 MAX_NAMED_LIST, s+11, US"address list");
2788
2789 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2790 read_named_list(&localpartlist_anchor, &localpartlist_count,
2791 MAX_NAMED_LIST, s+13, US"local part list");
2792
2793 else
2794 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2795 NULL, US"main option \"%s\" unknown");
2796 }
2797
2798
2799 /* If local_sender_retain is set, local_from_check must be unset. */
2800
2801 if (local_sender_retain && local_from_check)
2802 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2803 "local_sender_retain are set; this combination is not allowed");
2804
2805 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2806 wanted. */
2807
2808 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2809
2810 /* remote_max_parallel must be > 0 */
2811
2812 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2813
2814 /* The primary host name may be required for expansion of spool_directory
2815 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2816 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2817 canonize it. Some people like upper case letters in their host names, so we
2818 don't force the case. */
2819
2820 if (primary_hostname == NULL)
2821 {
2822 uschar *hostname;
2823 struct utsname uts;
2824 if (uname(&uts) < 0)
2825 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2826 hostname = US uts.nodename;
2827
2828 if (Ustrchr(hostname, '.') == NULL)
2829 {
2830 int af = AF_INET;
2831 struct hostent *hostdata;
2832
2833 #if HAVE_IPV6
2834 if (dns_ipv4_lookup == NULL ||
2835 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2836 TRUE, NULL) != OK)
2837 af = AF_INET6;
2838 #else
2839 af = AF_INET;
2840 #endif
2841
2842 for (;;)
2843 {
2844 #if HAVE_IPV6
2845 #if HAVE_GETIPNODEBYNAME
2846 int error_num;
2847 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2848 #else
2849 hostdata = gethostbyname2(CS hostname, af);
2850 #endif
2851 #else
2852 hostdata = gethostbyname(CS hostname);
2853 #endif
2854
2855 if (hostdata != NULL)
2856 {
2857 hostname = US hostdata->h_name;
2858 break;
2859 }
2860
2861 if (af == AF_INET) break;
2862 af = AF_INET;
2863 }
2864 }
2865
2866 primary_hostname = string_copy(hostname);
2867 }
2868
2869 /* Set up default value for smtp_active_hostname */
2870
2871 smtp_active_hostname = primary_hostname;
2872
2873 /* If spool_directory wasn't set in the build-time configuration, it must have
2874 got set above. Of course, writing to the log may not work if log_file_path is
2875 not set, but it will at least get to syslog or somewhere, with any luck. */
2876
2877 if (*spool_directory == 0)
2878 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2879 "proceed");
2880
2881 /* Expand the spool directory name; it may, for example, contain the primary
2882 host name. Same comment about failure. */
2883
2884 s = expand_string(spool_directory);
2885 if (s == NULL)
2886 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2887 "\"%s\": %s", spool_directory, expand_string_message);
2888 spool_directory = s;
2889
2890 /* Expand log_file_path, which must contain "%s" in any component that isn't
2891 the null string or "syslog". It is also allowed to contain one instance of %D.
2892 However, it must NOT contain % followed by anything else. */
2893
2894 if (*log_file_path != 0)
2895 {
2896 uschar *ss, *sss;
2897 int sep = ':'; /* Fixed for log file path */
2898 s = expand_string(log_file_path);
2899 if (s == NULL)
2900 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2901 "\"%s\": %s", log_file_path, expand_string_message);
2902
2903 ss = s;
2904 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2905 {
2906 uschar *t;
2907 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2908 t = Ustrstr(sss, "%s");
2909 if (t == NULL)
2910 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2911 "contain \"%%s\"", sss);
2912 *t = 'X';
2913 t = Ustrchr(sss, '%');
2914 if (t != NULL)
2915 {
2916 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2917 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2918 "unexpected \"%%\" character", s);
2919 }
2920 }
2921
2922 log_file_path = s;
2923 }
2924
2925 /* Interpret syslog_facility into an integer argument for 'ident' param to
2926 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2927 leading "log_". */
2928
2929 if (syslog_facility_str != NULL)
2930 {
2931 int i;
2932 uschar *s = syslog_facility_str;
2933
2934 if ((Ustrlen(syslog_facility_str) >= 4) &&
2935 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2936 s += 4;
2937
2938 for (i = 0; i < syslog_list_size; i++)
2939 {
2940 if (strcmpic(s, syslog_list[i].name) == 0)
2941 {
2942 syslog_facility = syslog_list[i].value;
2943 break;
2944 }
2945 }
2946
2947 if (i >= syslog_list_size)
2948 {
2949 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2950 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2951 }
2952 }
2953
2954 /* Expand pid_file_path */
2955
2956 if (*pid_file_path != 0)
2957 {
2958 s = expand_string(pid_file_path);
2959 if (s == NULL)
2960 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2961 "\"%s\": %s", pid_file_path, expand_string_message);
2962 pid_file_path = s;
2963 }
2964
2965 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2966 message. */
2967
2968 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2969
2970 /* Unpick the SMTP rate limiting options, if set */
2971
2972 if (smtp_ratelimit_mail != NULL)
2973 {
2974 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2975 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2976 }
2977
2978 if (smtp_ratelimit_rcpt != NULL)
2979 {
2980 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
2981 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
2982 }
2983
2984 /* The qualify domains default to the primary host name */
2985
2986 if (qualify_domain_sender == NULL)
2987 qualify_domain_sender = primary_hostname;
2988 if (qualify_domain_recipient == NULL)
2989 qualify_domain_recipient = qualify_domain_sender;
2990
2991 /* Setting system_filter_user in the configuration sets the gid as well if a
2992 name is given, but a numerical value does not. */
2993
2994 if (system_filter_uid_set && !system_filter_gid_set)
2995 {
2996 struct passwd *pw = getpwuid(system_filter_uid);
2997 if (pw == NULL)
2998 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
2999 (long int)system_filter_uid);
3000 system_filter_gid = pw->pw_gid;
3001 system_filter_gid_set = TRUE;
3002 }
3003
3004 /* If the errors_reply_to field is set, check that it is syntactically valid
3005 and ensure it contains a domain. */
3006
3007 if (errors_reply_to != NULL)
3008 {
3009 uschar *errmess;
3010 int start, end, domain;
3011 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3012 &start, &end, &domain, FALSE);
3013
3014 if (recipient == NULL)
3015 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3016 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3017
3018 if (domain == 0)
3019 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3020 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3021 }
3022
3023 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3024 smtp_accept_max must also be set. */
3025
3026 if (smtp_accept_max == 0 &&
3027 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3028 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3029 "smtp_accept_max must be set if smtp_accept_queue or "
3030 "smtp_accept_max_per_host is set");
3031
3032 /* Set up the host number if anything is specified. It is an expanded string
3033 so that it can be computed from the host name, for example. We do this last
3034 so as to ensure that everything else is set up before the expansion. */
3035
3036 if (host_number_string != NULL)
3037 {
3038 uschar *end;
3039 uschar *s = expand_string(host_number_string);
3040 long int n = Ustrtol(s, &end, 0);
3041 while (isspace(*end)) end++;
3042 if (*end != 0)
3043 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3044 "localhost_number value is not a number: %s", s);
3045 if (n > LOCALHOST_MAX)
3046 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3047 "localhost_number is greater than the maximum allowed value (%d)",
3048 LOCALHOST_MAX);
3049 host_number = n;
3050 }
3051
3052 #ifdef SUPPORT_TLS
3053 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3054
3055 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3056 tls_verify_certificates == NULL)
3057 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3058 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3059 (tls_verify_hosts != NULL)? "" : "try_");
3060 #endif
3061 }
3062
3063
3064
3065 /*************************************************
3066 * Initialize one driver *
3067 *************************************************/
3068
3069 /* This is called once the driver's generic options, if any, have been read.
3070 We can now find the driver, set up defaults for the private options, and
3071 unset any "set" bits in the private options table (which might have been
3072 set by another incarnation of the same driver).
3073
3074 Arguments:
3075 d pointer to driver instance block, with generic
3076 options filled in
3077 drivers_available vector of available drivers
3078 size_of_info size of each block in drivers_available
3079 class class of driver, for error message
3080
3081 Returns: pointer to the driver info block
3082 */
3083
3084 static driver_info *
3085 init_driver(driver_instance *d, driver_info *drivers_available,
3086 int size_of_info, uschar *class)
3087 {
3088 driver_info *dd;
3089
3090 for (dd = drivers_available; dd->driver_name[0] != 0;
3091 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3092 {
3093 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3094 {
3095 int i;
3096 int len = dd->options_len;
3097 d->info = dd;
3098 d->options_block = store_get(len);
3099 memcpy(d->options_block, dd->options_block, len);
3100 for (i = 0; i < *(dd->options_count); i++)
3101 dd->options[i].type &= ~opt_set;
3102 return dd;
3103 }
3104 }
3105
3106 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3107 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3108
3109 return NULL; /* never obeyed */
3110 }
3111
3112
3113
3114
3115 /*************************************************
3116 * Initialize driver list *
3117 *************************************************/
3118
3119 /* This function is called for routers, transports, and authentication
3120 mechanisms. It reads the data from the current point in the configuration file
3121 up to the end of the section, and sets up a chain of instance blocks according
3122 to the file's contents. The file will already have been opened by a call to
3123 readconf_main, and must be left open for subsequent reading of further data.
3124
3125 Any errors cause a panic crash. Note that the blocks with names driver_info and
3126 driver_instance must map the first portions of all the _info and _instance
3127 blocks for this shared code to work.
3128
3129 Arguments:
3130 class "router", "transport", or "authenticator"
3131 anchor &routers, &transports, &auths
3132 drivers_available available drivers
3133 size_of_info size of each info block
3134 instance_default points to default data for an instance
3135 instance_size size of instance block
3136 driver_optionlist generic option list
3137 driver_optionlist_count count of generic option list
3138
3139 Returns: nothing
3140 */
3141
3142 void
3143 readconf_driver_init(
3144 uschar *class,
3145 driver_instance **anchor,
3146 driver_info *drivers_available,
3147 int size_of_info,
3148 void *instance_default,
3149 int instance_size,
3150 optionlist *driver_optionlist,
3151 int driver_optionlist_count)
3152 {
3153 driver_instance **p = anchor;
3154 driver_instance *d = NULL;
3155 uschar *buffer;
3156
3157 while ((buffer = get_config_line()) != NULL)
3158 {
3159 uschar name[64];
3160 uschar *s;
3161
3162 /* Read the first name on the line and test for the start of a new driver. A
3163 macro definition indicates the end of the previous driver. If this isn't the
3164 start of a new driver, the line will be re-read. */
3165
3166 s = readconf_readname(name, sizeof(name), buffer);
3167
3168 /* Handle macro definition, first finishing off the initialization of the
3169 previous driver, if any. */
3170
3171 if (isupper(*name) && *s == '=')
3172 {
3173 if (d != NULL)
3174 {
3175 if (d->driver_name == NULL)
3176 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3177 "no driver defined for %s \"%s\"", class, d->name);
3178 (d->info->init)(d);
3179 d = NULL;
3180 }
3181 read_macro_assignment(buffer);
3182 continue;
3183 }
3184
3185 /* If the line starts with a name terminated by a colon, we are at the
3186 start of the definition of a new driver. The rest of the line must be
3187 blank. */
3188
3189 if (*s++ == ':')
3190 {
3191 int i;
3192
3193 /* Finish off initializing the previous driver. */
3194
3195 if (d != NULL)
3196 {
3197 if (d->driver_name == NULL)
3198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3199 "no driver defined for %s \"%s\"", class, d->name);
3200 (d->info->init)(d);
3201 }
3202
3203 /* Check that we haven't already got a driver of this name */
3204
3205 for (d = *anchor; d != NULL; d = d->next)
3206 if (Ustrcmp(name, d->name) == 0)
3207 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3208 "there are two %ss called \"%s\"", class, name);
3209
3210 /* Set up a new driver instance data block on the chain, with
3211 its default values installed. */
3212
3213 d = store_get(instance_size);
3214 memcpy(d, instance_default, instance_size);
3215 *p = d;
3216 p = &(d->next);
3217 d->name = string_copy(name);
3218
3219 /* Clear out the "set" bits in the generic options */
3220
3221 for (i = 0; i < driver_optionlist_count; i++)
3222 driver_optionlist[i].type &= ~opt_set;
3223
3224 /* Check nothing more on this line, then do the next loop iteration. */
3225
3226 while (isspace(*s)) s++;
3227 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3228 continue;
3229 }
3230
3231 /* Not the start of a new driver. Give an error if we have not set up a
3232 current driver yet. */
3233
3234 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3235 "%s name missing", class);
3236
3237 /* First look to see if this is a generic option; if it is "driver",
3238 initialize the driver. If is it not a generic option, we can look for a
3239 private option provided that the driver has been previously set up. */
3240
3241 if (readconf_handle_option(buffer, driver_optionlist,
3242 driver_optionlist_count, d, NULL))
3243 {
3244 if (d->info == NULL && d->driver_name != NULL)
3245 init_driver(d, drivers_available, size_of_info, class);
3246 }
3247
3248 /* Handle private options - pass the generic block because some may
3249 live therein. A flag with each option indicates if it is in the public
3250 block. */
3251
3252 else if (d->info != NULL)
3253 {
3254 readconf_handle_option(buffer, d->info->options,
3255 *(d->info->options_count), d, US"option \"%s\" unknown");
3256 }
3257
3258 /* The option is not generic and the driver name has not yet been given. */
3259
3260 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3261 "(\"driver\" must be specified before any private options)", name);
3262 }
3263
3264 /* Run the initialization function for the final driver. */
3265
3266 if (d != NULL)
3267 {
3268 if (d->driver_name == NULL)
3269 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3270 "no driver defined for %s \"%s\"", class, d->name);
3271 (d->info->init)(d);
3272 }
3273 }
3274
3275
3276
3277 /*************************************************
3278 * Check driver dependency *
3279 *************************************************/
3280
3281 /* This function is passed a driver instance and a string. It checks whether
3282 any of the string options for the driver contains the given string as an
3283 expansion variable.
3284
3285 Arguments:
3286 d points to a driver instance block
3287 s the string to search for
3288
3289 Returns: TRUE if a dependency is found
3290 */
3291
3292 BOOL
3293 readconf_depends(driver_instance *d, uschar *s)
3294 {
3295 int count = *(d->info->options_count);
3296 optionlist *ol;
3297 uschar *ss;
3298
3299 for (ol = d->info->options; ol < d->info->options + count; ol++)
3300 {
3301 void *options_block;
3302 uschar *value;
3303 int type = ol->type & opt_mask;
3304 if (type != opt_stringptr) continue;
3305 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3306 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3307 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3308 {
3309 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3310 isalnum(ss[Ustrlen(s)])) continue;
3311 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3312 d->name, ol->name, s);
3313 return TRUE;
3314 }
3315 }
3316
3317 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3318 return FALSE;
3319 }
3320
3321
3322
3323
3324 /*************************************************
3325 * Decode an error type for retries *
3326 *************************************************/
3327
3328 /* This function is global because it is also called from the main
3329 program when testing retry information. It decodes strings such as "quota_7d"
3330 into numerical error codes.
3331
3332 Arguments:
3333 pp points to start of text
3334 p points past end of text
3335 basic_errno points to an int to receive the main error number
3336 more_errno points to an int to receive the secondary error data
3337
3338 Returns: NULL if decoded correctly; else points to error text
3339 */
3340
3341 uschar *
3342 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3343 {
3344 int len;
3345 uschar *q = pp;
3346 while (q < p && *q != '_') q++;
3347 len = q - pp;
3348
3349 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3350 {
3351 *basic_errno = ERRNO_EXIMQUOTA;
3352 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3353 return US"bad time value";
3354 }
3355
3356 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3357 {
3358 *basic_errno = ECONNREFUSED;
3359 if (q != p)
3360 {
3361 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3362 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3363 else return US"A or MX expected after \"refused\"";
3364 }
3365 }
3366
3367 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3368 {
3369 *basic_errno = ETIMEDOUT;
3370 if (q != p)
3371 {
3372 int i;
3373 int xlen = p - q - 1;
3374 uschar *x = q + 1;
3375
3376 static uschar *extras[] =
3377 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3378 static int values[] =
3379 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3380
3381 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3382 {
3383 if (strncmpic(x, extras[i], xlen) == 0)
3384 {
3385 *more_errno = values[i];
3386 break;
3387 }
3388 }
3389
3390 if (i >= sizeof(extras)/sizeof(uschar *))
3391 {
3392 if (strncmpic(x, US"DNS", xlen) == 0)
3393 {
3394 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3395 "available in retry rules (it has never worked) - treated as "
3396 "\"timeout\"");
3397 }
3398 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3399 }
3400 }
3401 }
3402
3403 else if (strncmpic(pp, US"rcpt_4", 6) == 0)
3404 {
3405 BOOL bad = FALSE;
3406 int x = 255; /* means "any 4xx code" */
3407 if (p != pp + 8) bad = TRUE; else
3408 {
3409 int a = pp[6], b = pp[7];
3410 if (isdigit(a))
3411 {
3412 x = (a - '0') * 10;
3413 if (isdigit(b)) x += b - '0';
3414 else if (b == 'x') x += 100;
3415 else bad = TRUE;
3416 }
3417 else if (a != 'x' || b != 'x') bad = TRUE;
3418 }
3419
3420 if (bad) return US"rcpt_4 must be followed by xx, dx, or dd, where "
3421 "x is literal and d is any digit";
3422
3423 *basic_errno = ERRNO_RCPT4XX;
3424 *more_errno = x << 8;
3425 }
3426
3427 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3428 strncmpic(q+1, US"failed", p-q-1) == 0)
3429 {
3430 *basic_errno = ERRNO_AUTHFAIL;
3431 }
3432
3433 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3434 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3435
3436 return NULL;
3437 }
3438
3439
3440
3441
3442 /*************************************************
3443 * Read retry information *
3444 *************************************************/
3445
3446 /* Each line of retry information contains:
3447
3448 . A domain name pattern or an address pattern;
3449
3450 . An error name, possibly with additional data, or *;
3451
3452 . An optional sequence of retry items, each consisting of an identifying
3453 letter, a cutoff time, and optional parameters.
3454
3455 All this is decoded and placed into a control block. */
3456
3457
3458 /* Subroutine to read an argument, preceded by a comma and terminated
3459 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3460 1 = fixed point number (returned *1000).
3461
3462 Arguments:
3463 paddr pointer to pointer to current character; updated
3464 type 0 => read a time; 1 => read a fixed point number
3465
3466 Returns: time in seconds or fixed point number * 1000
3467 */
3468
3469 static int
3470 retry_arg(uschar **paddr, int type)
3471 {
3472 uschar *p = *paddr;
3473 uschar *pp;
3474
3475 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3476
3477 while (isspace(*p)) p++;
3478 pp = p;
3479 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3480
3481 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3482 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3483
3484 *paddr = p;
3485 switch (type)
3486 {
3487 case 0:
3488 return readconf_readtime(pp, *p, FALSE);
3489 case 1:
3490 return readconf_readfixed(pp, *p);
3491 }
3492 return 0; /* Keep picky compilers happy */
3493 }
3494
3495 /* The function proper */
3496
3497 void
3498 readconf_retries(void)
3499 {
3500 retry_config **chain = &retries;
3501 retry_config *next;
3502 uschar *p;
3503
3504 while ((p = get_config_line()) != NULL)
3505 {
3506 retry_rule **rchain;
3507 uschar *pp, *error;
3508
3509 next = store_get(sizeof(retry_config));
3510 next->next = NULL;
3511 *chain = next;
3512 chain = &(next->next);
3513 next->basic_errno = next->more_errno = 0;
3514 next->senders = NULL;
3515 next->rules = NULL;
3516 rchain = &(next->rules);
3517
3518 next->pattern = string_dequote(&p);
3519 while (isspace(*p)) p++;
3520 pp = p;
3521 while (mac_isgraph(*p)) p++;
3522 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3523 "missing error type");
3524
3525 /* Test error names for things we understand. */
3526
3527 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3528 &(next->more_errno))) != NULL)
3529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3530
3531 /* There may be an optional address list of senders to be used as another
3532 constraint on the rule. This was added later, so the syntax is a bit of a
3533 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3534 an address list. */
3535
3536 while (isspace(*p)) p++;
3537 if (Ustrncmp(p, "senders", 7) == 0)
3538 {
3539 p += 7;
3540 while (isspace(*p)) p++;
3541 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3542 "\"=\" expected after \"senders\" in retry rule");
3543 while (isspace(*p)) p++;
3544 next->senders = string_dequote(&p);
3545 }
3546
3547 /* Now the retry rules. Keep the maximum timeout encountered. */
3548
3549 while (isspace(*p)) p++;
3550
3551 while (*p != 0)
3552 {
3553 retry_rule *rule = store_get(sizeof(retry_rule));
3554 *rchain = rule;
3555 rchain = &(rule->next);
3556 rule->next = NULL;
3557 rule->rule = toupper(*p++);
3558 rule->timeout = retry_arg(&p, 0);
3559 if (rule->timeout > retry_maximum_timeout)
3560 retry_maximum_timeout = rule->timeout;
3561
3562 switch (rule->rule)
3563 {
3564 case 'F': /* Fixed interval */
3565 rule->p1 = retry_arg(&p, 0);
3566 break;
3567
3568 case 'G': /* Geometrically increasing intervals */
3569 case 'H': /* Ditto, but with randomness */
3570 rule->p1 = retry_arg(&p, 0);
3571 rule->p2 = retry_arg(&p, 1);
3572 break;
3573
3574 default:
3575 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3576 break;
3577 }
3578
3579 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3580 (rule->rule != 'F' && rule->p2 < 1000))
3581 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3582 "bad parameters for retry rule");
3583
3584 while (isspace(*p)) p++;
3585 if (*p == ';')
3586 {
3587 p++;
3588 while (isspace(*p)) p++;
3589 }
3590 else if (*p != 0)
3591 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3592 }
3593 }
3594 }
3595
3596
3597
3598 /*************************************************
3599 * Initialize authenticators *
3600 *************************************************/
3601
3602 /* Read the authenticators section of the configuration file.
3603
3604 Arguments: none
3605 Returns: nothing
3606 */
3607
3608 static void
3609 auths_init(void)
3610 {
3611 auth_instance *au, *bu;
3612 readconf_driver_init(US"authenticator",
3613 (driver_instance **)(&auths), /* chain anchor */
3614 (driver_info *)auths_available, /* available drivers */
3615 sizeof(auth_info), /* size of info block */
3616 &auth_defaults, /* default values for generic options */
3617 sizeof(auth_instance), /* size of instance block */
3618 optionlist_auths, /* generic options */
3619 optionlist_auths_size);
3620
3621 for (au = auths; au != NULL; au = au->next)
3622 {
3623 if (au->public_name == NULL)
3624 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3625 "the %s authenticator", au->name);
3626 for (bu = au->next; bu != NULL; bu = bu->next)
3627 {
3628 if (strcmpic(au->public_name, bu->public_name) == 0)
3629 {
3630 if ((au->client && bu->client) || (au->server && bu->server))
3631 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3632 "(%s and %s) have the same public name (%s)",
3633 (au->client)? US"client" : US"server", au->name, bu->name,
3634 au->public_name);
3635 }
3636 }
3637 }
3638 }
3639
3640
3641
3642
3643 /*************************************************
3644 * Read ACL information *
3645 *************************************************/
3646
3647 /* If this run of Exim is not doing something that involves receiving a
3648 message, we can just skip over the ACL information. No need to parse it.
3649
3650 First, we have a function for acl_read() to call back to get the next line. We
3651 need to remember the line we passed, because at the end it will contain the
3652 name of the next ACL. */
3653
3654 static uschar *acl_line;
3655
3656 static uschar *
3657 acl_callback(void)
3658 {
3659 acl_line = get_config_line();
3660 return acl_line;
3661 }
3662
3663
3664 /* Now the main function:
3665
3666 Arguments:
3667 skip TRUE when this Exim process is doing something that will
3668 not need the ACL data
3669
3670 Returns: nothing
3671 */
3672
3673 static void
3674 readconf_acl(BOOL skip)
3675 {
3676 uschar *p;
3677
3678 /* Not receiving messages, don't need to parse the ACL data */
3679
3680 if (skip)
3681 {
3682 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3683 while ((p = get_config_line()) != NULL);
3684 return;
3685 }
3686
3687 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3688 between ACLs. */
3689
3690 acl_line = get_config_line();
3691
3692 while(acl_line != NULL)
3693 {
3694 uschar name[64];
3695 tree_node *node;
3696 uschar *error;
3697
3698 p = readconf_readname(name, sizeof(name), acl_line);
3699 if (isupper(*name) && *p == '=')
3700 {
3701 read_macro_assignment(acl_line);
3702 acl_line = get_config_line();
3703 continue;
3704 }
3705
3706 if (*p != ':' || name[0] == 0)
3707 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3708
3709 node = store_get(sizeof(tree_node) + Ustrlen(name));
3710 Ustrcpy(node->name, name);
3711 if (!tree_insertnode(&acl_anchor, node))
3712 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3713 "there are two ACLs called \"%s\"", name);
3714
3715 node->data.ptr = acl_read(acl_callback, &error);
3716
3717 if (node->data.ptr == NULL && error != NULL)
3718 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3719 }
3720 }
3721
3722
3723
3724 /*************************************************
3725 * Read configuration for local_scan() *
3726 *************************************************/
3727
3728 /* This function is called after "begin local_scan" is encountered in the
3729 configuration file. If the local_scan() function allows for configuration
3730 options, we can process them. Otherwise, we expire in a panic.
3731
3732 Arguments: none
3733 Returns: nothing
3734 */
3735
3736 static void
3737 local_scan_init(void)
3738 {
3739 #ifndef LOCAL_SCAN_HAS_OPTIONS
3740 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3741 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3742 #else
3743
3744 uschar *p;
3745 while ((p = get_config_line()) != NULL)
3746 {
3747 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3748 NULL, US"local_scan option \"%s\" unknown");
3749 }
3750 #endif
3751 }
3752
3753
3754
3755 /*************************************************
3756 * Read rest of configuration (after main) *
3757 *************************************************/
3758
3759 /* This function reads the rest of the runtime configuration, after the main
3760 configuration. It is called only when actually needed. Each subsequent section
3761 of the configuration starts with a line of the form
3762
3763 begin name
3764
3765 where the name is "routers", "transports", etc. A section is terminated by
3766 hitting the next "begin" line, and the next name is left in next_section.
3767 Because it may confuse people as to whether the names are singular or plural,
3768 we add "s" if it's missing. There is always enough room in next_section for
3769 this. This function is basically just a switch.
3770
3771 Arguments:
3772 skip_acl TRUE if ACL information is not needed
3773
3774 Returns: nothing
3775 */
3776
3777 static uschar *section_list[] = {
3778 US"acls",
3779 US"authenticators",
3780 US"local_scans",
3781 US"retrys",
3782 US"rewrites",
3783 US"routers",
3784 US"transports"};
3785
3786 void
3787 readconf_rest(BOOL skip_acl)
3788 {
3789 int had = 0;
3790
3791 while(next_section[0] != 0)
3792 {
3793 int bit;
3794 int first = 0;
3795 int last = sizeof(section_list) / sizeof(uschar *);
3796 int mid = last/2;
3797 int n = Ustrlen(next_section);
3798
3799 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3800
3801 for (;;)
3802 {
3803 int c = strcmpic(next_section, section_list[mid]);
3804 if (c == 0) break;
3805 if (c > 0) first = mid + 1; else last = mid;
3806 if (first >= last)
3807 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3808 "\"%.*s\" is not a known configuration section name", n, next_section);
3809 mid = (last + first)/2;
3810 }
3811
3812 bit = 1 << mid;
3813 if (((had ^= bit) & bit) == 0)
3814 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3815 "\"%.*s\" section is repeated in the configuration file", n,
3816 next_section);
3817
3818 switch(mid)
3819 {
3820 case 0: readconf_acl(skip_acl); break;
3821 case 1: auths_init(); break;
3822 case 2: local_scan_init(); break;
3823 case 3: readconf_retries(); break;
3824 case 4: readconf_rewrites(); break;
3825 case 5: route_init(); break;
3826 case 6: transport_init(); break;
3827 }
3828 }
3829
3830 (void)fclose(config_file);
3831 }
3832
3833 /* End of readconf.c */
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