Fix retry key bug for pipe, file, or autoreply deliveries.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.18 2006/02/08 14:28:51 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
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_rfc2047_length", opt_bool, &check_rfc2047_length },
186 { "check_spool_inodes", opt_int, &check_spool_inodes },
187 { "check_spool_space", opt_Kint, &check_spool_space },
188 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
189 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
190 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
191 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
192 { "delay_warning", opt_timelist, &delay_warning },
193 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
194 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
195 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
196 { "delivery_date_remove", opt_bool, &delivery_date_remove },
197 { "disable_ipv6", opt_bool, &disable_ipv6 },
198 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
199 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
200 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
201 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
202 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
203 { "dns_retrans", opt_time, &dns_retrans },
204 { "dns_retry", opt_int, &dns_retry },
205 /* This option is now a no-op, retained for compability */
206 { "drop_cr", opt_bool, &drop_cr },
207 /*********************************************************/
208 { "envelope_to_remove", opt_bool, &envelope_to_remove },
209 { "errors_copy", opt_stringptr, &errors_copy },
210 { "errors_reply_to", opt_stringptr, &errors_reply_to },
211 { "exim_group", opt_gid, &exim_gid },
212 { "exim_path", opt_stringptr, &exim_path },
213 { "exim_user", opt_uid, &exim_uid },
214 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
215 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
216 { "finduser_retries", opt_int, &finduser_retries },
217 { "freeze_tell", opt_stringptr, &freeze_tell },
218 { "gecos_name", opt_stringptr, &gecos_name },
219 { "gecos_pattern", opt_stringptr, &gecos_pattern },
220 { "header_line_maxsize", opt_int, &header_line_maxsize },
221 { "header_maxsize", opt_int, &header_maxsize },
222 { "headers_charset", opt_stringptr, &headers_charset },
223 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
224 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
225 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
226 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
227 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
228 { "hold_domains", opt_stringptr, &hold_domains },
229 { "host_lookup", opt_stringptr, &host_lookup },
230 { "host_lookup_order", opt_stringptr, &host_lookup_order },
231 { "host_reject_connection", opt_stringptr, &host_reject_connection },
232 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
233 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
234 #ifdef LOOKUP_IBASE
235 { "ibase_servers", opt_stringptr, &ibase_servers },
236 #endif
237 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
238 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
239 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
240 { "keep_malformed", opt_time, &keep_malformed },
241 #ifdef LOOKUP_LDAP
242 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
243 { "ldap_version", opt_int, &eldap_version },
244 #endif
245 { "local_from_check", opt_bool, &local_from_check },
246 { "local_from_prefix", opt_stringptr, &local_from_prefix },
247 { "local_from_suffix", opt_stringptr, &local_from_suffix },
248 { "local_interfaces", opt_stringptr, &local_interfaces },
249 { "local_scan_timeout", opt_time, &local_scan_timeout },
250 { "local_sender_retain", opt_bool, &local_sender_retain },
251 { "localhost_number", opt_stringptr, &host_number_string },
252 { "log_file_path", opt_stringptr, &log_file_path },
253 { "log_selector", opt_stringptr, &log_selector_string },
254 { "log_timezone", opt_bool, &log_timezone },
255 { "lookup_open_max", opt_int, &lookup_open_max },
256 { "max_username_length", opt_int, &max_username_length },
257 { "message_body_visible", opt_mkint, &message_body_visible },
258 { "message_id_header_domain", opt_stringptr, &message_id_domain },
259 { "message_id_header_text", opt_stringptr, &message_id_text },
260 { "message_logs", opt_bool, &message_logs },
261 { "message_size_limit", opt_stringptr, &message_size_limit },
262 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
263 { "move_frozen_messages", opt_bool, &move_frozen_messages },
264 #endif
265 { "mua_wrapper", opt_bool, &mua_wrapper },
266 #ifdef LOOKUP_MYSQL
267 { "mysql_servers", opt_stringptr, &mysql_servers },
268 #endif
269 { "never_users", opt_uidlist, &never_users },
270 #ifdef LOOKUP_ORACLE
271 { "oracle_servers", opt_stringptr, &oracle_servers },
272 #endif
273 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
274 #ifdef EXIM_PERL
275 { "perl_at_start", opt_bool, &opt_perl_at_start },
276 { "perl_startup", opt_stringptr, &opt_perl_startup },
277 #endif
278 #ifdef LOOKUP_PGSQL
279 { "pgsql_servers", opt_stringptr, &pgsql_servers },
280 #endif
281 { "pid_file_path", opt_stringptr, &pid_file_path },
282 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
283 { "preserve_message_logs", opt_bool, &preserve_message_logs },
284 { "primary_hostname", opt_stringptr, &primary_hostname },
285 { "print_topbitchars", opt_bool, &print_topbitchars },
286 { "process_log_path", opt_stringptr, &process_log_path },
287 { "prod_requires_admin", opt_bool, &prod_requires_admin },
288 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
289 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
290 { "queue_domains", opt_stringptr, &queue_domains },
291 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
292 { "queue_only", opt_bool, &queue_only },
293 { "queue_only_file", opt_stringptr, &queue_only_file },
294 { "queue_only_load", opt_fixed, &queue_only_load },
295 { "queue_only_override", opt_bool, &queue_only_override },
296 { "queue_run_in_order", opt_bool, &queue_run_in_order },
297 { "queue_run_max", opt_int, &queue_run_max },
298 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
299 { "receive_timeout", opt_time, &receive_timeout },
300 { "received_header_text", opt_stringptr, &received_header_text },
301 { "received_headers_max", opt_int, &received_headers_max },
302 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
303 { "recipients_max", opt_int, &recipients_max },
304 { "recipients_max_reject", opt_bool, &recipients_max_reject },
305 { "remote_max_parallel", opt_int, &remote_max_parallel },
306 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
307 { "retry_data_expire", opt_time, &retry_data_expire },
308 { "retry_interval_max", opt_time, &retry_interval_max },
309 { "return_path_remove", opt_bool, &return_path_remove },
310 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
311 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
312 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
313 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
314 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
315 { "smtp_accept_max", opt_int, &smtp_accept_max },
316 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
317 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
318 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
319 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
320 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
321 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
322 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
323 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
324 { "smtp_banner", opt_stringptr, &smtp_banner },
325 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
326 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
327 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
328 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
329 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
330 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
331 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
332 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
333 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
334 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
335 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
336 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
337 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
338 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
339 #ifdef WITH_CONTENT_SCAN
340 { "spamd_address", opt_stringptr, &spamd_address },
341 #endif
342 { "split_spool_directory", opt_bool, &split_spool_directory },
343 { "spool_directory", opt_stringptr, &spool_directory },
344 #ifdef LOOKUP_SQLITE
345 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
346 #endif
347 #ifdef EXPERIMENTAL_SRS
348 { "srs_config", opt_stringptr, &srs_config },
349 { "srs_hashlength", opt_int, &srs_hashlength },
350 { "srs_hashmin", opt_int, &srs_hashmin },
351 { "srs_maxage", opt_int, &srs_maxage },
352 { "srs_secrets", opt_stringptr, &srs_secrets },
353 { "srs_usehash", opt_bool, &srs_usehash },
354 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
355 #endif
356 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
357 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
358 { "syslog_duplication", opt_bool, &syslog_duplication },
359 { "syslog_facility", opt_stringptr, &syslog_facility_str },
360 { "syslog_processname", opt_stringptr, &syslog_processname },
361 { "syslog_timestamp", opt_bool, &syslog_timestamp },
362 { "system_filter", opt_stringptr, &system_filter },
363 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
364 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
365 { "system_filter_group", opt_gid, &system_filter_gid },
366 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
367 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
368 { "system_filter_user", opt_uid, &system_filter_uid },
369 { "tcp_nodelay", opt_bool, &tcp_nodelay },
370 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
371 { "timezone", opt_stringptr, &timezone_string },
372 #ifdef SUPPORT_TLS
373 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
374 { "tls_certificate", opt_stringptr, &tls_certificate },
375 { "tls_crl", opt_stringptr, &tls_crl },
376 { "tls_dhparam", opt_stringptr, &tls_dhparam },
377 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
378 { "tls_privatekey", opt_stringptr, &tls_privatekey },
379 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
380 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
381 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
382 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
383 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
384 #endif
385 { "trusted_groups", opt_gidlist, &trusted_groups },
386 { "trusted_users", opt_uidlist, &trusted_users },
387 { "unknown_login", opt_stringptr, &unknown_login },
388 { "unknown_username", opt_stringptr, &unknown_username },
389 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
390 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
391 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
392 { "warn_message_file", opt_stringptr, &warn_message_file },
393 { "write_rejectlog", opt_bool, &write_rejectlog }
394 };
395
396 static int optionlist_config_size =
397 sizeof(optionlist_config)/sizeof(optionlist);
398
399
400
401 /*************************************************
402 * Find the name of an option *
403 *************************************************/
404
405 /* This function is to aid debugging. Various functions take arguments that are
406 pointer variables in the options table or in option tables for various drivers.
407 For debugging output, it is useful to be able to find the name of the option
408 which is currently being processed. This function finds it, if it exists, by
409 searching the table(s).
410
411 Arguments: a value that is presumed to be in the table above
412 Returns: the option name, or an empty string
413 */
414
415 uschar *
416 readconf_find_option(void *p)
417 {
418 int i;
419 router_instance *r;
420 transport_instance *t;
421
422 for (i = 0; i < optionlist_config_size; i++)
423 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
424
425 for (r = routers; r != NULL; r = r->next)
426 {
427 router_info *ri = r->info;
428 for (i = 0; i < ri->options_count[0]; i++)
429 {
430 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
431 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
432 return US ri->options[i].name;
433 }
434 }
435
436 for (t = transports; t != NULL; t = t->next)
437 {
438 transport_info *ti = t->info;
439 for (i = 0; i < ti->options_count[0]; i++)
440 {
441 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
442 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
443 return US ti->options[i].name;
444 }
445 }
446
447 return US"";
448 }
449
450
451
452
453 /*************************************************
454 * Deal with an assignment to a macro *
455 *************************************************/
456
457 /* This function is called when a line that starts with an upper case letter is
458 encountered. The argument "line" should contain a complete logical line, and
459 start with the first letter of the macro name. The macro name and the
460 replacement text are extracted and stored. Redefinition of existing,
461 non-command line, macros is permitted using '==' instead of '='.
462
463 Arguments:
464 s points to the start of the logical line
465
466 Returns: nothing
467 */
468
469 static void
470 read_macro_assignment(uschar *s)
471 {
472 uschar name[64];
473 int namelen = 0;
474 BOOL redef = FALSE;
475 macro_item *m;
476 macro_item *mlast = NULL;
477
478 while (isalnum(*s) || *s == '_')
479 {
480 if (namelen >= sizeof(name) - 1)
481 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
482 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
483 name[namelen++] = *s++;
484 }
485 name[namelen] = 0;
486
487 while (isspace(*s)) s++;
488 if (*s++ != '=')
489 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
490
491 if (*s == '=')
492 {
493 redef = TRUE;
494 s++;
495 }
496 while (isspace(*s)) s++;
497
498 /* If an existing macro of the same name was defined on the command line, we
499 just skip this definition. It's an error to attempt to redefine a macro without
500 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
501 It is also an error to define a macro whose name begins with the name of a
502 previously defined macro. Note: it is documented that the other way round
503 works. */
504
505 for (m = macros; m != NULL; m = m->next)
506 {
507 int len = Ustrlen(m->name);
508
509 if (Ustrcmp(m->name, name) == 0)
510 {
511 if (!m->command_line && !redef)
512 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
513 "defined (use \"==\" if you want to redefine it", name);
514 break;
515 }
516
517 if (len < namelen && Ustrstr(name, m->name) != NULL)
518 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
519 "a macro because previously defined macro \"%s\" is a substring",
520 name, m->name);
521
522 /* We cannot have this test, because it is documented that a substring
523 macro is permitted (there is even an example).
524 *
525 * if (len > namelen && Ustrstr(m->name, name) != NULL)
526 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
527 * "a macro because it is a substring of previously defined macro \"%s\"",
528 * name, m->name);
529 */
530
531 mlast = m;
532 }
533
534 /* Check for an overriding command-line definition. */
535
536 if (m != NULL && m->command_line) return;
537
538 /* Redefinition must refer to an existing macro. */
539
540 if (redef)
541 {
542 if (m == NULL)
543 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
544 "\"%s\"", name);
545 }
546
547 /* We have a new definition. The macro_item structure includes a final vector
548 called "name" which is one byte long. Thus, adding "namelen" gives us enough
549 room to store the "name" string. */
550
551 else
552 {
553 m = store_get(sizeof(macro_item) + namelen);
554 if (macros == NULL) macros = m; else mlast->next = m;
555 Ustrncpy(m->name, name, namelen);
556 m->name[namelen] = 0;
557 m->next = NULL;
558 m->command_line = FALSE;
559 }
560
561 /* Set the value of the new or redefined macro */
562
563 m->replacement = string_copy(s);
564 }
565
566
567
568
569
570 /*************************************************
571 * Read configuration line *
572 *************************************************/
573
574 /* A logical line of text is read from the configuration file into the big
575 buffer, taking account of macros, .includes, and continuations. The size of
576 big_buffer is increased if necessary. The count of configuration lines is
577 maintained. Physical input lines starting with # (ignoring leading white space,
578 and after macro replacement) and empty logical lines are always ignored.
579 Leading and trailing spaces are removed.
580
581 If we hit a line of the form "begin xxxx", the xxxx is placed in the
582 next_section vector, and the function returns NULL, indicating the end of a
583 configuration section. On end-of-file, NULL is returned with next_section
584 empty.
585
586 Arguments: none
587
588 Returns: a pointer to the first non-blank in the line,
589 or NULL if eof or end of section is reached
590 */
591
592 static uschar *
593 get_config_line(void)
594 {
595 int startoffset = 0; /* To first non-blank char in logical line */
596 int len = 0; /* Of logical line so far */
597 int newlen;
598 uschar *s, *ss;
599 macro_item *m;
600 BOOL macro_found;
601
602 /* Loop for handling continuation lines, skipping comments, and dealing with
603 .include files. */
604
605 for (;;)
606 {
607 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
608 {
609 if (config_file_stack != NULL) /* EOF inside .include */
610 {
611 (void)fclose(config_file);
612 config_file = config_file_stack->file;
613 config_filename = config_file_stack->filename;
614 config_lineno = config_file_stack->lineno;
615 config_file_stack = config_file_stack->next;
616 continue;
617 }
618
619 /* EOF at top level */
620
621 if (cstate_stack_ptr >= 0)
622 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
623 "Unexpected end of configuration file: .endif missing");
624
625 if (len != 0) break; /* EOF after continuation */
626 next_section[0] = 0; /* EOF at start of logical line */
627 return NULL;
628 }
629
630 config_lineno++;
631 newlen = len + Ustrlen(big_buffer + len);
632
633 /* Handle pathologically long physical lines - yes, it did happen - by
634 extending big_buffer at this point. The code also copes with very long
635 logical lines. */
636
637 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
638 {
639 uschar *newbuffer;
640 big_buffer_size += BIG_BUFFER_SIZE;
641 newbuffer = store_malloc(big_buffer_size);
642
643 /* This use of strcpy is OK because we know that the string in the old
644 buffer is shorter than the new buffer. */
645
646 Ustrcpy(newbuffer, big_buffer);
647 store_free(big_buffer);
648 big_buffer = newbuffer;
649 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
650 break;
651 newlen += Ustrlen(big_buffer + newlen);
652 }
653
654 /* Find the true start of the physical line - leading spaces are always
655 ignored. */
656
657 ss = big_buffer + len;
658 while (isspace(*ss)) ss++;
659
660 /* Process the physical line for macros. If this is the start of the logical
661 line, skip over initial text at the start of the line if it starts with an
662 upper case character followed by a sequence of name characters and an equals
663 sign, because that is the definition of a new macro, and we don't do
664 replacement therein. */
665
666 s = ss;
667 if (len == 0 && isupper(*s))
668 {
669 while (isalnum(*s) || *s == '_') s++;
670 while (isspace(*s)) s++;
671 if (*s != '=') s = ss; /* Not a macro definition */
672 }
673
674 /* For each defined macro, scan the line (from after XXX= if present),
675 replacing all occurrences of the macro. */
676
677 macro_found = FALSE;
678 for (m = macros; m != NULL; m = m->next)
679 {
680 uschar *p, *pp;
681 uschar *t = s;
682
683 while ((p = Ustrstr(t, m->name)) != NULL)
684 {
685 int moveby;
686 int namelen = Ustrlen(m->name);
687 int replen = Ustrlen(m->replacement);
688
689 /* Expand the buffer if necessary */
690
691 while (newlen - namelen + replen + 1 > big_buffer_size)
692 {
693 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
694 uschar *newbuffer = store_malloc(newsize);
695 memcpy(newbuffer, big_buffer, newlen + 1);
696 p = newbuffer + (p - big_buffer);
697 s = newbuffer + (s - big_buffer);
698 ss = newbuffer + (ss - big_buffer);
699 t = newbuffer + (t - big_buffer);
700 big_buffer_size = newsize;
701 store_free(big_buffer);
702 big_buffer = newbuffer;
703 }
704
705 /* Shuffle the remaining characters up or down in the buffer before
706 copying in the replacement text. Don't rescan the replacement for this
707 same macro. */
708
709 pp = p + namelen;
710 moveby = replen - namelen;
711 if (moveby != 0)
712 {
713 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
714 newlen += moveby;
715 }
716 Ustrncpy(p, m->replacement, replen);
717 t = p + replen;
718 macro_found = TRUE;
719 }
720 }
721
722 /* An empty macro replacement at the start of a line could mean that ss no
723 longer points to the first non-blank character. */
724
725 while (isspace(*ss)) ss++;
726
727 /* Check for comment lines - these are physical lines. */
728
729 if (*ss == '#') continue;
730
731 /* Handle conditionals, which are also applied to physical lines. Conditions
732 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
733 expansion occured on the rest of the line. A preliminary test for the leading
734 '.' saves effort on most lines. */
735
736 if (*ss == '.')
737 {
738 int i;
739
740 /* Search the list of conditional directives */
741
742 for (i = 0; i < cond_list_size; i++)
743 {
744 int n;
745 cond_item *c = cond_list+i;
746 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
747
748 /* The following character must be white space or end of string */
749
750 n = ss[1 + c->namelen];
751 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
752
753 /* .ifdef and .ifndef push the current state onto the stack, then set
754 a new one from the table. Stack overflow is an error */
755
756 if (c->pushpop > 0)
757 {
758 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
760 ".%s nested too deeply", c->name);
761 cstate_stack[++cstate_stack_ptr] = cstate;
762 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
763 }
764
765 /* For any of the others, stack underflow is an error. The next state
766 comes either from the stack (.endif) or from the table. */
767
768 else
769 {
770 if (cstate_stack_ptr < 0)
771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
772 ".%s without matching .ifdef", c->name);
773 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
774 next_cstate[cstate][macro_found? c->action1 : c->action2];
775 }
776
777 /* Having dealt with a directive, break the loop */
778
779 break;
780 }
781
782 /* If we have handled a conditional directive, continue with the next
783 physical line. Otherwise, fall through. */
784
785 if (i < cond_list_size) continue;
786 }
787
788 /* If the conditional state is not 0 (actively using these lines), ignore
789 this input line. */
790
791 if (cstate != 0) continue; /* Conditional skip */
792
793 /* Handle .include lines - these are also physical lines. */
794
795 if (Ustrncmp(ss, ".include", 8) == 0 &&
796 (isspace(ss[8]) ||
797 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
798 {
799 uschar *t;
800 int include_if_exists = isspace(ss[8])? 0 : 10;
801 config_file_item *save;
802 struct stat statbuf;
803
804 ss += 9 + include_if_exists;
805 while (isspace(*ss)) ss++;
806 t = ss + Ustrlen(ss);
807 while (t > ss && isspace(t[-1])) t--;
808 if (*ss == '\"' && t[-1] == '\"')
809 {
810 ss++;
811 t--;
812 }
813 *t = 0;
814
815 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
816
817 save = store_get(sizeof(config_file_item));
818 save->next = config_file_stack;
819 config_file_stack = save;
820 save->file = config_file;
821 save->filename = config_filename;
822 save->lineno = config_lineno;
823
824 config_file = Ufopen(ss, "rb");
825 if (config_file == NULL)
826 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
827 "configuration file %s", ss);
828 config_filename = string_copy(ss);
829 config_lineno = 0;
830 continue;
831 }
832
833 /* If this is the start of the logical line, remember where the non-blank
834 data starts. Otherwise shuffle down continuation lines to remove leading
835 white space. */
836
837 if (len == 0)
838 startoffset = ss - big_buffer;
839 else
840 {
841 s = big_buffer + len;
842 if (ss > s)
843 {
844 memmove(s, ss, (newlen - len) - (ss - s) + 1);
845 newlen -= ss - s;
846 }
847 }
848
849 /* Accept the new addition to the line. Remove trailing white space. */
850
851 len = newlen;
852 while (len > 0 && isspace(big_buffer[len-1])) len--;
853 big_buffer[len] = 0;
854
855 /* We are done if the line does not end in backslash and contains some data.
856 Empty logical lines are ignored. For continuations, remove the backslash and
857 go round the loop to read the continuation line. */
858
859 if (len > 0)
860 {
861 if (big_buffer[len-1] != '\\') break; /* End of logical line */
862 big_buffer[--len] = 0; /* Remove backslash */
863 }
864 } /* Loop for reading multiple physical lines */
865
866 /* We now have a logical line. Test for the end of a configuration section (or,
867 more accurately, for the start of the next section). Place the name of the next
868 section in next_section, and return NULL. If the name given is longer than
869 next_section, truncate it. It will be unrecognized later, because all the known
870 section names do fit. Leave space for pluralizing. */
871
872 s = big_buffer + startoffset; /* First non-space character */
873 if (strncmpic(s, US"begin ", 6) == 0)
874 {
875 s += 6;
876 while (isspace(*s)) s++;
877 if (big_buffer + len - s > sizeof(next_section) - 2)
878 s[sizeof(next_section) - 2] = 0;
879 Ustrcpy(next_section, s);
880 return NULL;
881 }
882
883 /* Return the first non-blank character. */
884
885 return s;
886 }
887
888
889
890 /*************************************************
891 * Read a name *
892 *************************************************/
893
894 /* The yield is the pointer to the next uschar. Names longer than the
895 output space are silently truncated. This function is also used from acl.c when
896 parsing ACLs.
897
898 Arguments:
899 name where to put the name
900 len length of name
901 s input pointer
902
903 Returns: new input pointer
904 */
905
906 uschar *
907 readconf_readname(uschar *name, int len, uschar *s)
908 {
909 int p = 0;
910 while (isspace(*s)) s++;
911 if (isalpha(*s))
912 {
913 while (isalnum(*s) || *s == '_')
914 {
915 if (p < len-1) name[p++] = *s;
916 s++;
917 }
918 }
919 name[p] = 0;
920 while (isspace(*s)) s++;
921 return s;
922 }
923
924
925
926
927 /*************************************************
928 * Read a time value *
929 *************************************************/
930
931 /* This function is also called from outside, to read argument
932 time values. The format of a time value is:
933
934 [<n>w][<n>d][<n>h][<n>m][<n>s]
935
936 as long as at least one is present. If a format error is encountered,
937 return a negative value. The value must be terminated by the given
938 terminator.
939
940 Arguments:
941 s input pointer
942 terminator required terminating character
943 return_msec if TRUE, allow fractional seconds and return milliseconds
944
945 Returns: the time value, or -1 on syntax error
946 value is seconds if return_msec is FALSE
947 value is milliseconds if return_msec is TRUE
948 */
949
950 int
951 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
952 {
953 int yield = 0;
954 for (;;)
955 {
956 int value, count;
957 double fraction;
958
959 if (!isdigit(*s)) return -1;
960 (void)sscanf(CS s, "%d%n", &value, &count);
961 s += count;
962
963 switch (*s)
964 {
965 case 'w': value *= 7;
966 case 'd': value *= 24;
967 case 'h': value *= 60;
968 case 'm': value *= 60;
969 case 's': s++;
970 break;
971
972 case '.':
973 if (!return_msec) return -1;
974 (void)sscanf(CS s, "%lf%n", &fraction, &count);
975 s += count;
976 if (*s++ != 's') return -1;
977 yield += (int)(fraction * 1000.0);
978 break;
979
980 default: return -1;
981 }
982
983 if (return_msec) value *= 1000;
984 yield += value;
985 if (*s == terminator) return yield;
986 }
987 /* Control never reaches here. */
988 }
989
990
991
992 /*************************************************
993 * Read a fixed point value *
994 *************************************************/
995
996 /* The value is returned *1000
997
998 Arguments:
999 s input pointer
1000 terminator required terminator
1001
1002 Returns: the value, or -1 on error
1003 */
1004
1005 static int
1006 readconf_readfixed(uschar *s, int terminator)
1007 {
1008 int yield = 0;
1009 int value, count;
1010 if (!isdigit(*s)) return -1;
1011 (void)sscanf(CS s, "%d%n", &value, &count);
1012 s += count;
1013 yield = value * 1000;
1014 if (*s == '.')
1015 {
1016 int m = 100;
1017 while (isdigit((*(++s))))
1018 {
1019 yield += (*s - '0') * m;
1020 m /= 10;
1021 }
1022 }
1023
1024 return (*s == terminator)? yield : (-1);
1025 }
1026
1027
1028
1029 /*************************************************
1030 * Find option in list *
1031 *************************************************/
1032
1033 /* The lists are always in order, so binary chop can be used.
1034
1035 Arguments:
1036 name the option name to search for
1037 ol the first entry in the option list
1038 last one more than the offset of the last entry in the option list
1039
1040 Returns: pointer to an option entry, or NULL if not found
1041 */
1042
1043 static optionlist *
1044 find_option(uschar *name, optionlist *ol, int last)
1045 {
1046 int first = 0;
1047 while (last > first)
1048 {
1049 int middle = (first + last)/2;
1050 int c = Ustrcmp(name, ol[middle].name);
1051 if (c == 0) return ol + middle;
1052 else if (c > 0) first = middle + 1;
1053 else last = middle;
1054 }
1055 return NULL;
1056 }
1057
1058
1059
1060 /*************************************************
1061 * Find a set flag in option list *
1062 *************************************************/
1063
1064 /* Because some versions of Unix make no restrictions on the values of uids and
1065 gids (even negative ones), we cannot represent "unset" by a special value.
1066 There is therefore a separate boolean variable for each one indicating whether
1067 a value is set or not. This function returns a pointer to the boolean, given
1068 the original option name. It is a major disaster if the flag cannot be found.
1069
1070 Arguments:
1071 name the name of the uid or gid option
1072 oltop points to the start of the relevant option list
1073 last one more than the offset of the last item in the option list
1074 data_block NULL when reading main options => data values in the option
1075 list are absolute addresses; otherwise they are byte offsets
1076 in data_block (used for driver options)
1077
1078 Returns: a pointer to the boolean flag.
1079 */
1080
1081 static BOOL *
1082 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1083 {
1084 optionlist *ol;
1085 uschar name2[64];
1086 sprintf(CS name2, "*set_%.50s", name);
1087 ol = find_option(name2, oltop, last);
1088 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1089 "Exim internal error: missing set flag for %s", name);
1090 return (data_block == NULL)? (BOOL *)(ol->value) :
1091 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1092 }
1093
1094
1095
1096
1097 /*************************************************
1098 * Output extra characters message and die *
1099 *************************************************/
1100
1101 /* Called when an option line has junk on the end. Sometimes this is because
1102 the sysadmin thinks comments are permitted.
1103
1104 Arguments:
1105 s points to the extra characters
1106 t1..t3 strings to insert in the log message
1107
1108 Returns: doesn't return; dies
1109 */
1110
1111 static void
1112 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1113 {
1114 uschar *comment = US"";
1115 if (*s == '#') comment = US" (# is comment only at line start)";
1116 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1117 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1118 }
1119
1120
1121
1122 /*************************************************
1123 * Read rewrite information *
1124 *************************************************/
1125
1126 /* Each line of rewrite information contains:
1127
1128 . A complete address in the form user@domain, possibly with
1129 leading * for each part; or alternatively, a regex.
1130
1131 . A replacement string (which will be expanded).
1132
1133 . An optional sequence of one-letter flags, indicating which
1134 headers etc. to apply this rule to.
1135
1136 All this is decoded and placed into a control block. The OR of the flags is
1137 maintained in a common word.
1138
1139 Arguments:
1140 p points to the string that makes up the rule
1141 existflags points to the overall flag word
1142 isglobal TRUE if reading global rewrite rules
1143
1144 Returns: the control block for the parsed rule.
1145 */
1146
1147 static rewrite_rule *
1148 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1149 {
1150 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1151
1152 next->next = NULL;
1153 next->key = string_dequote(&p);
1154
1155 while (isspace(*p)) p++;
1156 if (*p == 0)
1157 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1158 "missing rewrite replacement string");
1159
1160 next->flags = 0;
1161 next->replacement = string_dequote(&p);
1162
1163 while (*p != 0) switch (*p++)
1164 {
1165 case ' ': case '\t': break;
1166
1167 case 'q': next->flags |= rewrite_quit; break;
1168 case 'w': next->flags |= rewrite_whole; break;
1169
1170 case 'h': next->flags |= rewrite_all_headers; break;
1171 case 's': next->flags |= rewrite_sender; break;
1172 case 'f': next->flags |= rewrite_from; break;
1173 case 't': next->flags |= rewrite_to; break;
1174 case 'c': next->flags |= rewrite_cc; break;
1175 case 'b': next->flags |= rewrite_bcc; break;
1176 case 'r': next->flags |= rewrite_replyto; break;
1177
1178 case 'E': next->flags |= rewrite_all_envelope; break;
1179 case 'F': next->flags |= rewrite_envfrom; break;
1180 case 'T': next->flags |= rewrite_envto; break;
1181
1182 case 'Q': next->flags |= rewrite_qualify; break;
1183 case 'R': next->flags |= rewrite_repeat; break;
1184
1185 case 'S':
1186 next->flags |= rewrite_smtp;
1187 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1188 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1189 "rewrite rule has the S flag but is not a regular expression");
1190 break;
1191
1192 default:
1193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1194 "unknown rewrite flag character '%c' "
1195 "(could be missing quotes round replacement item)", p[-1]);
1196 break;
1197 }
1198
1199 /* If no action flags are set, set all the "normal" rewrites. */
1200
1201 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1202 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1203
1204 /* Remember which exist, for optimization, and return the rule */
1205
1206 *existflags |= next->flags;
1207 return next;
1208 }
1209
1210
1211
1212
1213 /*************************************************
1214 * Read global rewrite information *
1215 *************************************************/
1216
1217 /* Each line is a single rewrite rule; it is parsed into a control block
1218 by readconf_one_rewrite(), and its flags are ORed into the global flag
1219 word rewrite_existflags. */
1220
1221 void
1222 readconf_rewrites(void)
1223 {
1224 rewrite_rule **chain = &global_rewrite_rules;
1225 uschar *p;
1226
1227 while ((p = get_config_line()) != NULL)
1228 {
1229 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1230 *chain = next;
1231 chain = &(next->next);
1232 }
1233 }
1234
1235
1236
1237 /*************************************************
1238 * Read a string *
1239 *************************************************/
1240
1241 /* Strings are read into the normal store pool. As long we aren't too
1242 near the end of the current block, the string will just use what is necessary
1243 on the top of the stacking pool, because string_cat() uses the extension
1244 mechanism.
1245
1246 Argument:
1247 s the rest of the input line
1248 name the option name (for errors)
1249
1250 Returns: pointer to the string
1251 */
1252
1253 static uschar *
1254 read_string(uschar *s, uschar *name)
1255 {
1256 uschar *yield;
1257 uschar *ss;
1258
1259 if (*s != '\"') return string_copy(s);
1260
1261 ss = s;
1262 yield = string_dequote(&s);
1263
1264 if (s == ss+1 || s[-1] != '\"')
1265 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1266 "missing quote at end of string value for %s", name);
1267
1268 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1269
1270 return yield;
1271 }
1272
1273
1274 /*************************************************
1275 * Handle option line *
1276 *************************************************/
1277
1278 /* This function is called from several places to process a line containing the
1279 setting of an option. The first argument is the line to be decoded; it has been
1280 checked not to be empty and not to start with '#'. Trailing newlines and white
1281 space have been removed. The second argument is a pointer to the list of
1282 variable names that are to be recognized, together with their types and
1283 locations, and the third argument gives the number of entries in the list.
1284
1285 The fourth argument is a pointer to a data block. If it is NULL, then the data
1286 values in the options list are absolute addresses. Otherwise, they are byte
1287 offsets in the data block.
1288
1289 String option data may continue onto several lines; this function reads further
1290 data from config_file if necessary.
1291
1292 The yield of this function is normally zero. If a string continues onto
1293 multiple lines, then the data value is permitted to be followed by a comma
1294 or a semicolon (for use in drivers) and the yield is that character.
1295
1296 Arguments:
1297 buffer contains the configuration line to be handled
1298 oltop points to the start of the relevant option list
1299 last one more than the offset of the last item in the option list
1300 data_block NULL when reading main options => data values in the option
1301 list are absolute addresses; otherwise they are byte offsets
1302 in data_block when they have opt_public set; otherwise
1303 they are byte offsets in data_block->options_block.
1304 unknown_txt format string to use in panic message for unknown option;
1305 must contain %s for option name
1306 if given as NULL, don't panic on unknown option
1307
1308 Returns: TRUE if an option was read successfully,
1309 FALSE false for an unknown option if unknown_txt == NULL,
1310 otherwise panic and die on an unknown option
1311 */
1312
1313 static BOOL
1314 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1315 void *data_block, uschar *unknown_txt)
1316 {
1317 int ptr = 0;
1318 int offset = 0;
1319 int n, count, type, value;
1320 int issecure = 0;
1321 uid_t uid;
1322 gid_t gid;
1323 BOOL boolvalue = TRUE;
1324 BOOL freesptr = TRUE;
1325 optionlist *ol, *ol2;
1326 struct passwd *pw;
1327 void *reset_point;
1328 int intbase = 0;
1329 uschar *inttype = US"";
1330 uschar *sptr;
1331 uschar *s = buffer;
1332 uschar name[64];
1333 uschar name2[64];
1334
1335 /* There may be leading spaces; thereafter, we expect an option name starting
1336 with a letter. */
1337
1338 while (isspace(*s)) s++;
1339 if (!isalpha(*s))
1340 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1341
1342 /* Read the name of the option, and skip any subsequent white space. If
1343 it turns out that what we read was "hide", set the flag indicating that
1344 this is a secure option, and loop to read the next word. */
1345
1346 for (n = 0; n < 2; n++)
1347 {
1348 while (isalnum(*s) || *s == '_')
1349 {
1350 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1351 s++;
1352 }
1353 name[ptr] = 0;
1354 while (isspace(*s)) s++;
1355 if (Ustrcmp(name, "hide") != 0) break;
1356 issecure = opt_secure;
1357 ptr = 0;
1358 }
1359
1360 /* Deal with "no_" or "not_" here for booleans */
1361
1362 if (Ustrncmp(name, "no_", 3) == 0)
1363 {
1364 boolvalue = FALSE;
1365 offset = 3;
1366 }
1367
1368 if (Ustrncmp(name, "not_", 4) == 0)
1369 {
1370 boolvalue = FALSE;
1371 offset = 4;
1372 }
1373
1374 /* Search the list for the given name. A non-existent name, or an option that
1375 is set twice, is a disaster. */
1376
1377 ol = find_option(name + offset, oltop, last);
1378
1379 if (ol == NULL)
1380 {
1381 if (unknown_txt == NULL) return FALSE;
1382 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1383 }
1384
1385 if ((ol->type & opt_set) != 0)
1386 {
1387 uschar *mname = name;
1388 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1389 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1390 "\"%s\" option set for the second time", mname);
1391 }
1392
1393 ol->type |= opt_set | issecure;
1394 type = ol->type & opt_mask;
1395
1396 /* Types with data values must be followed by '='; the "no[t]_" prefix
1397 applies only to boolean values. */
1398
1399 if (type < opt_bool || type > opt_bool_last)
1400 {
1401 if (offset != 0)
1402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1403 "negation prefix applied to a non-boolean option");
1404 if (*s == 0)
1405 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1406 "unexpected end of line (data missing) after %s", name);
1407 if (*s != '=')
1408 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1409 }
1410
1411 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1412 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1413 ultimately expands to one of those values. */
1414
1415 else if (*s != 0 && (offset != 0 || *s != '='))
1416 extra_chars_error(s, US"boolean option ", name, US"");
1417
1418 /* Skip white space after = */
1419
1420 if (*s == '=') while (isspace((*(++s))));
1421
1422 /* If there is a data block and the opt_public flag is not set, change
1423 the data block pointer to the private options block. */
1424
1425 if (data_block != NULL && (ol->type & opt_public) == 0)
1426 data_block = (void *)(((driver_instance *)data_block)->options_block);
1427
1428 /* Now get the data according to the type. */
1429
1430 switch (type)
1431 {
1432 /* If a string value is not enclosed in quotes, it consists of
1433 the rest of the current line, verbatim. Otherwise, string escapes
1434 are processed.
1435
1436 A transport is specified as a string, which is then looked up in the
1437 list of transports. A search type is specified as one of a number of
1438 known strings.
1439
1440 A set or rewrite rules for a driver is specified as a string, which is
1441 then parsed into a suitable chain of control blocks.
1442
1443 Uids and gids are specified as strings which are then looked up in the
1444 passwd file. Lists of uids and gids are similarly specified as colon-
1445 separated strings. */
1446
1447 case opt_stringptr:
1448 case opt_uid:
1449 case opt_gid:
1450 case opt_expand_uid:
1451 case opt_expand_gid:
1452 case opt_uidlist:
1453 case opt_gidlist:
1454 case opt_rewrite:
1455
1456 reset_point = sptr = read_string(s, name);
1457
1458 /* Having read a string, we now have several different ways of using it,
1459 depending on the data type, so do another switch. If keeping the actual
1460 string is not required (because it is interpreted), freesptr is set TRUE,
1461 and at the end we reset the pool. */
1462
1463 switch (type)
1464 {
1465 /* If this was a string, set the variable to point to the new string,
1466 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1467 rules, we still keep the string (for printing), and parse the rules into a
1468 control block and flags word. */
1469
1470 case opt_stringptr:
1471 case opt_rewrite:
1472 if (data_block == NULL)
1473 *((uschar **)(ol->value)) = sptr;
1474 else
1475 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1476 freesptr = FALSE;
1477 if (type == opt_rewrite)
1478 {
1479 int sep = 0;
1480 int *flagptr;
1481 uschar *p = sptr;
1482 rewrite_rule **chain;
1483 optionlist *ol3;
1484
1485 sprintf(CS name2, "*%.50s_rules", name);
1486 ol2 = find_option(name2, oltop, last);
1487 sprintf(CS name2, "*%.50s_flags", name);
1488 ol3 = find_option(name2, oltop, last);
1489
1490 if (ol2 == NULL || ol3 == NULL)
1491 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1492 "rewrite rules not available for driver");
1493
1494 if (data_block == NULL)
1495 {
1496 chain = (rewrite_rule **)(ol2->value);
1497 flagptr = (int *)(ol3->value);
1498 }
1499 else
1500 {
1501 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1502 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1503 }
1504
1505 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1506 != NULL)
1507 {
1508 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1509 *chain = next;
1510 chain = &(next->next);
1511 }
1512
1513 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1514 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1515 "non-header rewrite - not allowed at transport time -");
1516 }
1517 break;
1518
1519 /* If it was an expanded uid, see if there is any expansion to be
1520 done by checking for the presence of a $ character. If there is, save it
1521 in the corresponding *expand_user option field. Otherwise, fall through
1522 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1523 of data. */
1524
1525 case opt_expand_uid:
1526 sprintf(CS name2, "*expand_%.50s", name);
1527 ol2 = find_option(name2, oltop, last);
1528 if (ol2 != NULL)
1529 {
1530 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1531
1532 if (data_block == NULL)
1533 *((uschar **)(ol2->value)) = ss;
1534 else
1535 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1536
1537 if (ss != NULL)
1538 {
1539 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1540 freesptr = FALSE;
1541 break;
1542 }
1543 }
1544
1545 /* Look up a fixed uid, and also make use of the corresponding gid
1546 if a passwd entry is returned and the gid has not been set. */
1547
1548 case opt_uid:
1549 if (!route_finduser(sptr, &pw, &uid))
1550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1551 if (data_block == NULL)
1552 *((uid_t *)(ol->value)) = uid;
1553 else
1554 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1555
1556 /* Set the flag indicating a fixed value is set */
1557
1558 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1559
1560 /* Handle matching gid if we have a passwd entry: done by finding the
1561 same name with terminating "user" changed to "group"; if not found,
1562 ignore. Also ignore if the value is already set. */
1563
1564 if (pw == NULL) break;
1565 Ustrcpy(name+Ustrlen(name)-4, "group");
1566 ol2 = find_option(name, oltop, last);
1567 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1568 (ol2->type & opt_mask) == opt_expand_gid))
1569 {
1570 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1571 if (! *set_flag)
1572 {
1573 if (data_block == NULL)
1574 *((gid_t *)(ol2->value)) = pw->pw_gid;
1575 else
1576 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1577 *set_flag = TRUE;
1578 }
1579 }
1580 break;
1581
1582 /* If it was an expanded gid, see if there is any expansion to be
1583 done by checking for the presence of a $ character. If there is, save it
1584 in the corresponding *expand_user option field. Otherwise, fall through
1585 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1586 of data. */
1587
1588 case opt_expand_gid:
1589 sprintf(CS name2, "*expand_%.50s", name);
1590 ol2 = find_option(name2, oltop, last);
1591 if (ol2 != NULL)
1592 {
1593 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1594
1595 if (data_block == NULL)
1596 *((uschar **)(ol2->value)) = ss;
1597 else
1598 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1599
1600 if (ss != NULL)
1601 {
1602 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1603 freesptr = FALSE;
1604 break;
1605 }
1606 }
1607
1608 /* Handle freestanding gid */
1609
1610 case opt_gid:
1611 if (!route_findgroup(sptr, &gid))
1612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1613 if (data_block == NULL)
1614 *((gid_t *)(ol->value)) = gid;
1615 else
1616 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1617 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1618 break;
1619
1620 /* If it was a uid list, look up each individual entry, and build
1621 a vector of uids, with a count in the first element. Put the vector
1622 in malloc store so we can free the string. (We are reading into
1623 permanent store already.) */
1624
1625 case opt_uidlist:
1626 {
1627 int count = 1;
1628 uid_t *list;
1629 int ptr = 0;
1630 uschar *p;
1631 uschar *op = expand_string (sptr);
1632
1633 if (op == NULL)
1634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1635 name, expand_string_message);
1636
1637 p = op;
1638 if (*p != 0) count++;
1639 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1640 list = store_malloc(count*sizeof(uid_t));
1641 list[ptr++] = (uid_t)(count - 1);
1642
1643 if (data_block == NULL)
1644 *((uid_t **)(ol->value)) = list;
1645 else
1646 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1647
1648 p = op;
1649 while (count-- > 1)
1650 {
1651 int sep = 0;
1652 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1653 if (!route_finduser(big_buffer, NULL, &uid))
1654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1655 big_buffer);
1656 list[ptr++] = uid;
1657 }
1658 }
1659 break;
1660
1661 /* If it was a gid list, look up each individual entry, and build
1662 a vector of gids, with a count in the first element. Put the vector
1663 in malloc store so we can free the string. (We are reading into permanent
1664 store already.) */
1665
1666 case opt_gidlist:
1667 {
1668 int count = 1;
1669 gid_t *list;
1670 int ptr = 0;
1671 uschar *p;
1672 uschar *op = expand_string (sptr);
1673
1674 if (op == NULL)
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1676 name, expand_string_message);
1677
1678 p = op;
1679 if (*p != 0) count++;
1680 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1681 list = store_malloc(count*sizeof(gid_t));
1682 list[ptr++] = (gid_t)(count - 1);
1683
1684 if (data_block == NULL)
1685 *((gid_t **)(ol->value)) = list;
1686 else
1687 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1688
1689 p = op;
1690 while (count-- > 1)
1691 {
1692 int sep = 0;
1693 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1694 if (!route_findgroup(big_buffer, &gid))
1695 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1696 big_buffer);
1697 list[ptr++] = gid;
1698 }
1699 }
1700 break;
1701 }
1702
1703 /* Release store if the value of the string doesn't need to be kept. */
1704
1705 if (freesptr) store_reset(reset_point);
1706 break;
1707
1708 /* Expanded boolean: if no characters follow, or if there are no dollar
1709 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1710 save the string for later expansion in the alternate place. */
1711
1712 case opt_expand_bool:
1713 if (*s != 0 && Ustrchr(s, '$') != 0)
1714 {
1715 sprintf(CS name2, "*expand_%.50s", name);
1716 ol2 = find_option(name2, oltop, last);
1717 if (ol2 != NULL)
1718 {
1719 reset_point = sptr = read_string(s, name);
1720 if (data_block == NULL)
1721 *((uschar **)(ol2->value)) = sptr;
1722 else
1723 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1724 freesptr = FALSE;
1725 break;
1726 }
1727 }
1728 /* Fall through */
1729
1730 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1731 look for yes/not/true/false. Some booleans are stored in a single bit in
1732 a single int. There's a special fudge for verify settings; without a suffix
1733 they set both xx_sender and xx_recipient. The table points to the sender
1734 value; search subsequently for the recipient. There's another special case:
1735 opt_bool_set also notes when a boolean has been set. */
1736
1737 case opt_bool:
1738 case opt_bit:
1739 case opt_bool_verify:
1740 case opt_bool_set:
1741 if (*s != 0)
1742 {
1743 s = readconf_readname(name2, 64, s);
1744 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1745 boolvalue = TRUE;
1746 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1747 boolvalue = FALSE;
1748 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1749 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1750 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1751 US"for boolean option ", name);
1752 }
1753
1754 /* Handle single-bit type. */
1755
1756 if (type == opt_bit)
1757 {
1758 int bit = 1 << ((ol->type >> 16) & 31);
1759 int *ptr = (data_block == NULL)?
1760 (int *)(ol->value) :
1761 (int *)((uschar *)data_block + (long int)ol->value);
1762 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1763 break;
1764 }
1765
1766 /* Handle full BOOL types */
1767
1768 if (data_block == NULL)
1769 *((BOOL *)(ol->value)) = boolvalue;
1770 else
1771 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1772
1773 /* Verify fudge */
1774
1775 if (type == opt_bool_verify)
1776 {
1777 sprintf(CS name2, "%.50s_recipient", name + offset);
1778 ol2 = find_option(name2, oltop, last);
1779 if (ol2 != NULL)
1780 {
1781 if (data_block == NULL)
1782 *((BOOL *)(ol2->value)) = boolvalue;
1783 else
1784 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1785 }
1786 }
1787
1788 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1789
1790 else if (type == opt_bool_set)
1791 {
1792 sprintf(CS name2, "*set_%.50s", name + offset);
1793 ol2 = find_option(name2, oltop, last);
1794 if (ol2 != NULL)
1795 {
1796 if (data_block == NULL)
1797 *((BOOL *)(ol2->value)) = TRUE;
1798 else
1799 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1800 }
1801 }
1802 break;
1803
1804 /* Octal integer */
1805
1806 case opt_octint:
1807 intbase = 8;
1808 inttype = US"octal ";
1809
1810 /* Integer: a simple(ish) case; allow octal and hex formats, and
1811 suffixes K and M. The different types affect output, not input. */
1812
1813 case opt_mkint:
1814 case opt_int:
1815 {
1816 uschar *endptr;
1817 errno = 0;
1818 value = strtol(CS s, CSS &endptr, intbase);
1819
1820 if (endptr == s)
1821 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1822 inttype, name);
1823
1824 if (errno != ERANGE)
1825 {
1826 if (tolower(*endptr) == 'k')
1827 {
1828 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1829 else value *= 1024;
1830 endptr++;
1831 }
1832 else if (tolower(*endptr) == 'm')
1833 {
1834 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1835 errno = ERANGE;
1836 else value *= 1024*1024;
1837 endptr++;
1838 }
1839 }
1840
1841 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1842 "absolute value of integer \"%s\" is too large (overflow)", s);
1843
1844 while (isspace(*endptr)) endptr++;
1845 if (*endptr != 0)
1846 extra_chars_error(endptr, inttype, US"integer value for ", name);
1847 }
1848
1849 if (data_block == NULL)
1850 *((int *)(ol->value)) = value;
1851 else
1852 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1853 break;
1854
1855 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1856 M. */
1857
1858 case opt_Kint:
1859 {
1860 uschar *endptr;
1861 errno = 0;
1862 value = strtol(CS s, CSS &endptr, intbase);
1863
1864 if (endptr == s)
1865 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1866 inttype, name);
1867
1868 if (errno != ERANGE)
1869 {
1870 if (tolower(*endptr) == 'm')
1871 {
1872 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1873 else value *= 1024;
1874 endptr++;
1875 }
1876 else if (tolower(*endptr) == 'k')
1877 {
1878 endptr++;
1879 }
1880 else
1881 {
1882 value = (value + 512)/1024;
1883 }
1884 }
1885
1886 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1887 "absolute value of integer \"%s\" is too large (overflow)", s);
1888
1889 while (isspace(*endptr)) endptr++;
1890 if (*endptr != 0)
1891 extra_chars_error(endptr, inttype, US"integer value for ", name);
1892 }
1893
1894 if (data_block == NULL)
1895 *((int *)(ol->value)) = value;
1896 else
1897 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1898 break;
1899
1900 /* Fixed-point number: held to 3 decimal places. */
1901
1902 case opt_fixed:
1903 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1904 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1905 "fixed-point number expected for %s", name);
1906
1907 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1908 "integer \"%s\" is too large (overflow)", s);
1909
1910 value *= 1000;
1911
1912 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1913 "integer \"%s\" is too large (overflow)", s);
1914
1915 if (s[count] == '.')
1916 {
1917 int d = 100;
1918 while (isdigit(s[++count]))
1919 {
1920 value += (s[count] - '0') * d;
1921 d /= 10;
1922 }
1923 }
1924
1925 while (isspace(s[count])) count++;
1926
1927 if (s[count] != 0)
1928 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1929
1930 if (data_block == NULL)
1931 *((int *)(ol->value)) = value;
1932 else
1933 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1934 break;
1935
1936 /* There's a special routine to read time values. */
1937
1938 case opt_time:
1939 value = readconf_readtime(s, 0, FALSE);
1940 if (value < 0)
1941 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1942 name);
1943 if (data_block == NULL)
1944 *((int *)(ol->value)) = value;
1945 else
1946 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1947 break;
1948
1949 /* A time list is a list of colon-separated times, with the first
1950 element holding the size of the list and the second the number of
1951 entries used. */
1952
1953 case opt_timelist:
1954 {
1955 int count = 0;
1956 int *list = (data_block == NULL)?
1957 (int *)(ol->value) :
1958 (int *)((uschar *)data_block + (long int)(ol->value));
1959
1960 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1961 {
1962 int terminator = 0;
1963 uschar *snext = Ustrchr(s, ':');
1964 if (snext != NULL)
1965 {
1966 uschar *ss = snext;
1967 while (ss > s && isspace(ss[-1])) ss--;
1968 terminator = *ss;
1969 }
1970 value = readconf_readtime(s, terminator, FALSE);
1971 if (value < 0)
1972 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1973 name);
1974 if (count > 1 && value <= list[count])
1975 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1976 "time value out of order for %s", name);
1977 list[count+1] = value;
1978 if (snext == NULL) break;
1979 s = snext + 1;
1980 while (isspace(*s)) s++;
1981 }
1982
1983 if (count > list[0] - 2)
1984 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1985 name);
1986 if (count > 0 && list[2] == 0) count = 0;
1987 list[1] = count;
1988 }
1989
1990 break;
1991 }
1992
1993 return TRUE;
1994 }
1995
1996
1997
1998 /*************************************************
1999 * Print a time value *
2000 *************************************************/
2001
2002 /*
2003 Argument: a time value in seconds
2004 Returns: pointer to a fixed buffer containing the time as a string,
2005 in readconf_readtime() format
2006 */
2007
2008 uschar *
2009 readconf_printtime(int t)
2010 {
2011 int s, m, h, d, w;
2012 uschar *p = time_buffer;
2013
2014 if (t < 0)
2015 {
2016 *p++ = '-';
2017 t = -t;
2018 }
2019
2020 s = t % 60;
2021 t /= 60;
2022 m = t % 60;
2023 t /= 60;
2024 h = t % 24;
2025 t /= 24;
2026 d = t % 7;
2027 w = t/7;
2028
2029 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2030 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2031 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2032 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2033 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2034
2035 return time_buffer;
2036 }
2037
2038
2039
2040 /*************************************************
2041 * Print an individual option value *
2042 *************************************************/
2043
2044 /* This is used by the -bP option, so prints to the standard output.
2045 The entire options list is passed in as an argument, because some options come
2046 in pairs - typically uid/gid settings, which can either be explicit numerical
2047 values, or strings to be expanded later. If the numerical value is unset,
2048 search for "*expand_<name>" to see if there is a string equivalent.
2049
2050 Arguments:
2051 ol option entry, or NULL for an unknown option
2052 name option name
2053 options_block NULL for main configuration options; otherwise points to
2054 a driver block; if the option doesn't have opt_public
2055 set, then options_block->options_block is where the item
2056 resides.
2057 oltop points to the option list in which ol exists
2058 last one more than the offset of the last entry in optop
2059
2060 Returns: nothing
2061 */
2062
2063 static void
2064 print_ol(optionlist *ol, uschar *name, void *options_block,
2065 optionlist *oltop, int last)
2066 {
2067 struct passwd *pw;
2068 struct group *gr;
2069 optionlist *ol2;
2070 void *value;
2071 uid_t *uidlist;
2072 gid_t *gidlist;
2073 uschar *s;
2074 uschar name2[64];
2075
2076 if (ol == NULL)
2077 {
2078 printf("%s is not a known option\n", name);
2079 return;
2080 }
2081
2082 /* Non-admin callers cannot see options that have been flagged secure by the
2083 "hide" prefix. */
2084
2085 if (!admin_user && (ol->type & opt_secure) != 0)
2086 {
2087 printf("%s = <value not displayable>\n", name);
2088 return;
2089 }
2090
2091 /* Else show the value of the option */
2092
2093 value = ol->value;
2094 if (options_block != NULL)
2095 {
2096 if ((ol->type & opt_public) == 0)
2097 options_block = (void *)(((driver_instance *)options_block)->options_block);
2098 value = (void *)((uschar *)options_block + (long int)value);
2099 }
2100
2101 switch(ol->type & opt_mask)
2102 {
2103 case opt_stringptr:
2104 case opt_rewrite: /* Show the text value */
2105 s = *((uschar **)value);
2106 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2107 break;
2108
2109 case opt_int:
2110 printf("%s = %d\n", name, *((int *)value));
2111 break;
2112
2113 case opt_mkint:
2114 {
2115 int x = *((int *)value);
2116 if (x != 0 && (x & 1023) == 0)
2117 {
2118 int c = 'K';
2119 x >>= 10;
2120 if ((x & 1023) == 0)
2121 {
2122 c = 'M';
2123 x >>= 10;
2124 }
2125 printf("%s = %d%c\n", name, x, c);
2126 }
2127 else printf("%s = %d\n", name, x);
2128 }
2129 break;
2130
2131 case opt_Kint:
2132 {
2133 int x = *((int *)value);
2134 if (x == 0) printf("%s = 0\n", name);
2135 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2136 else printf("%s = %dK\n", name, x);
2137 }
2138 break;
2139
2140 case opt_octint:
2141 printf("%s = %#o\n", name, *((int *)value));
2142 break;
2143
2144 /* Can be negative only when "unset", in which case integer */
2145
2146 case opt_fixed:
2147 {
2148 int x = *((int *)value);
2149 int f = x % 1000;
2150 int d = 100;
2151 if (x < 0) printf("%s =\n", name); else
2152 {
2153 printf("%s = %d.", name, x/1000);
2154 do
2155 {
2156 printf("%d", f/d);
2157 f %= d;
2158 d /= 10;
2159 }
2160 while (f != 0);
2161 printf("\n");
2162 }
2163 }
2164 break;
2165
2166 /* If the numerical value is unset, try for the string value */
2167
2168 case opt_expand_uid:
2169 if (! *get_set_flag(name, oltop, last, options_block))
2170 {
2171 sprintf(CS name2, "*expand_%.50s", name);
2172 ol2 = find_option(name2, oltop, last);
2173 if (ol2 != NULL)
2174 {
2175 void *value2 = ol2->value;
2176 if (options_block != NULL)
2177 value2 = (void *)((uschar *)options_block + (long int)value2);
2178 s = *((uschar **)value2);
2179 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2180 break;
2181 }
2182 }
2183
2184 /* Else fall through */
2185
2186 case opt_uid:
2187 if (! *get_set_flag(name, oltop, last, options_block))
2188 printf("%s =\n", name);
2189 else
2190 {
2191 pw = getpwuid(*((uid_t *)value));
2192 if (pw == NULL)
2193 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2194 else printf("%s = %s\n", name, pw->pw_name);
2195 }
2196 break;
2197
2198 /* If the numerical value is unset, try for the string value */
2199
2200 case opt_expand_gid:
2201 if (! *get_set_flag(name, oltop, last, options_block))
2202 {
2203 sprintf(CS name2, "*expand_%.50s", name);
2204 ol2 = find_option(name2, oltop, last);
2205 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2206 {
2207 void *value2 = ol2->value;
2208 if (options_block != NULL)
2209 value2 = (void *)((uschar *)options_block + (long int)value2);
2210 s = *((uschar **)value2);
2211 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2212 break;
2213 }
2214 }
2215
2216 /* Else fall through */
2217
2218 case opt_gid:
2219 if (! *get_set_flag(name, oltop, last, options_block))
2220 printf("%s =\n", name);
2221 else
2222 {
2223 gr = getgrgid(*((int *)value));
2224 if (gr == NULL)
2225 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2226 else printf("%s = %s\n", name, gr->gr_name);
2227 }
2228 break;
2229
2230 case opt_uidlist:
2231 uidlist = *((uid_t **)value);
2232 printf("%s =", name);
2233 if (uidlist != NULL)
2234 {
2235 int i;
2236 uschar sep = ' ';
2237 for (i = 1; i <= (int)(uidlist[0]); i++)
2238 {
2239 uschar *name = NULL;
2240 pw = getpwuid(uidlist[i]);
2241 if (pw != NULL) name = US pw->pw_name;
2242 if (name != NULL) printf("%c%s", sep, name);
2243 else printf("%c%ld", sep, (long int)(uidlist[i]));
2244 sep = ':';
2245 }
2246 }
2247 printf("\n");
2248 break;
2249
2250 case opt_gidlist:
2251 gidlist = *((gid_t **)value);
2252 printf("%s =", name);
2253 if (gidlist != NULL)
2254 {
2255 int i;
2256 uschar sep = ' ';
2257 for (i = 1; i <= (int)(gidlist[0]); i++)
2258 {
2259 uschar *name = NULL;
2260 gr = getgrgid(gidlist[i]);
2261 if (gr != NULL) name = US gr->gr_name;
2262 if (name != NULL) printf("%c%s", sep, name);
2263 else printf("%c%ld", sep, (long int)(gidlist[i]));
2264 sep = ':';
2265 }
2266 }
2267 printf("\n");
2268 break;
2269
2270 case opt_time:
2271 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2272 break;
2273
2274 case opt_timelist:
2275 {
2276 int i;
2277 int *list = (int *)value;
2278 printf("%s = ", name);
2279 for (i = 0; i < list[1]; i++)
2280 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2281 printf("\n");
2282 }
2283 break;
2284
2285 case opt_bit:
2286 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2287 "" : "no_", name);
2288 break;
2289
2290 case opt_expand_bool:
2291 sprintf(CS name2, "*expand_%.50s", name);
2292 ol2 = find_option(name2, oltop, last);
2293 if (ol2 != NULL && ol2->value != NULL)
2294 {
2295 void *value2 = ol2->value;
2296 if (options_block != NULL)
2297 value2 = (void *)((uschar *)options_block + (long int)value2);
2298 s = *((uschar **)value2);
2299 if (s != NULL)
2300 {
2301 printf("%s = %s\n", name, string_printing(s));
2302 break;
2303 }
2304 /* s == NULL => string not set; fall through */
2305 }
2306
2307 /* Fall through */
2308
2309 case opt_bool:
2310 case opt_bool_verify:
2311 case opt_bool_set:
2312 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2313 break;
2314 }
2315 }
2316
2317
2318
2319 /*************************************************
2320 * Print value from main configuration *
2321 *************************************************/
2322
2323 /* This function, called as a result of encountering the -bP option,
2324 causes the value of any main configuration variable to be output if the
2325 second argument is NULL. There are some special values:
2326
2327 all print all main configuration options
2328 configure_file print the name of the configuration file
2329 routers print the routers' configurations
2330 transports print the transports' configuration
2331 authenticators print the authenticators' configuration
2332 router_list print a list of router names
2333 transport_list print a list of transport names
2334 authenticator_list print a list of authentication mechanism names
2335 +name print a named list item
2336 local_scan print the local_scan options
2337
2338 If the second argument is not NULL, it must be one of "router", "transport", or
2339 "authenticator" in which case the first argument identifies the driver whose
2340 options are to be printed.
2341
2342 Arguments:
2343 name option name if type == NULL; else driver name
2344 type NULL or driver type name, as described above
2345
2346 Returns: nothing
2347 */
2348
2349 void
2350 readconf_print(uschar *name, uschar *type)
2351 {
2352 BOOL names_only = FALSE;
2353 optionlist *ol;
2354 optionlist *ol2 = NULL;
2355 driver_instance *d = NULL;
2356 int size = 0;
2357
2358 if (type == NULL)
2359 {
2360 if (*name == '+')
2361 {
2362 int i;
2363 tree_node *t;
2364 BOOL found = FALSE;
2365 static uschar *types[] = { US"address", US"domain", US"host",
2366 US"localpart" };
2367 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2368 &hostlist_anchor, &localpartlist_anchor };
2369
2370 for (i = 0; i < 4; i++)
2371 {
2372 t = tree_search(*(anchors[i]), name+1);
2373 if (t != NULL)
2374 {
2375 found = TRUE;
2376 printf("%slist %s = %s\n", types[i], name+1,
2377 ((namedlist_block *)(t->data.ptr))->string);
2378 }
2379 }
2380
2381 if (!found)
2382 printf("no address, domain, host, or local part list called \"%s\" "
2383 "exists\n", name+1);
2384
2385 return;
2386 }
2387
2388 if (Ustrcmp(name, "configure_file") == 0)
2389 {
2390 printf("%s\n", CS config_main_filename);
2391 return;
2392 }
2393
2394 if (Ustrcmp(name, "all") == 0)
2395 {
2396 for (ol = optionlist_config;
2397 ol < optionlist_config + optionlist_config_size; ol++)
2398 {
2399 if ((ol->type & opt_hidden) == 0)
2400 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2401 }
2402 return;
2403 }
2404
2405 if (Ustrcmp(name, "local_scan") == 0)
2406 {
2407 #ifndef LOCAL_SCAN_HAS_OPTIONS
2408 printf("local_scan() options are not supported\n");
2409 #else
2410 for (ol = local_scan_options;
2411 ol < local_scan_options + local_scan_options_count; ol++)
2412 {
2413 print_ol(ol, US ol->name, NULL, local_scan_options,
2414 local_scan_options_count);
2415 }
2416 #endif
2417 return;
2418 }
2419
2420 if (Ustrcmp(name, "routers") == 0)
2421 {
2422 type = US"router";
2423 name = NULL;
2424 }
2425 else if (Ustrcmp(name, "transports") == 0)
2426 {
2427 type = US"transport";
2428 name = NULL;
2429 }
2430
2431 else if (Ustrcmp(name, "authenticators") == 0)
2432 {
2433 type = US"authenticator";
2434 name = NULL;
2435 }
2436
2437 else if (Ustrcmp(name, "authenticator_list") == 0)
2438 {
2439 type = US"authenticator";
2440 name = NULL;
2441 names_only = TRUE;
2442 }
2443
2444 else if (Ustrcmp(name, "router_list") == 0)
2445 {
2446 type = US"router";
2447 name = NULL;
2448 names_only = TRUE;
2449 }
2450 else if (Ustrcmp(name, "transport_list") == 0)
2451 {
2452 type = US"transport";
2453 name = NULL;
2454 names_only = TRUE;
2455 }
2456 else
2457 {
2458 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2459 name, NULL, optionlist_config, optionlist_config_size);
2460 return;
2461 }
2462 }
2463
2464 /* Handle the options for a router or transport. Skip options that are flagged
2465 as hidden. Some of these are options with names starting with '*', used for
2466 internal alternative representations of other options (which the printing
2467 function will sort out). Others are synonyms kept for backward compatibility.
2468 */
2469
2470 if (Ustrcmp(type, "router") == 0)
2471 {
2472 d = (driver_instance *)routers;
2473 ol2 = optionlist_routers;
2474 size = optionlist_routers_size;
2475 }
2476 else if (Ustrcmp(type, "transport") == 0)
2477 {
2478 d = (driver_instance *)transports;
2479 ol2 = optionlist_transports;
2480 size = optionlist_transports_size;
2481 }
2482 else if (Ustrcmp(type, "authenticator") == 0)
2483 {
2484 d = (driver_instance *)auths;
2485 ol2 = optionlist_auths;
2486 size = optionlist_auths_size;
2487 }
2488
2489 if (names_only)
2490 {
2491 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2492 return;
2493 }
2494
2495 /* Either search for a given driver, or print all of them */
2496
2497 for (; d != NULL; d = d->next)
2498 {
2499 if (name == NULL)
2500 printf("\n%s %s:\n", d->name, type);
2501 else if (Ustrcmp(d->name, name) != 0) continue;
2502
2503 for (ol = ol2; ol < ol2 + size; ol++)
2504 {
2505 if ((ol->type & opt_hidden) == 0)
2506 print_ol(ol, US ol->name, d, ol2, size);
2507 }
2508
2509 for (ol = d->info->options;
2510 ol < d->info->options + *(d->info->options_count); ol++)
2511 {
2512 if ((ol->type & opt_hidden) == 0)
2513 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2514 }
2515 if (name != NULL) return;
2516 }
2517 if (name != NULL) printf("%s %s not found\n", type, name);
2518 }
2519
2520
2521
2522 /*************************************************
2523 * Read a named list item *
2524 *************************************************/
2525
2526 /* This function reads a name and a list (i.e. string). The name is used to
2527 save the list in a tree, sorted by its name. Each entry also has a number,
2528 which can be used for caching tests, but if the string contains any expansion
2529 items other than $key, the number is set negative to inhibit caching. This
2530 mechanism is used for domain, host, and address lists that are referenced by
2531 the "+name" syntax.
2532
2533 Arguments:
2534 anchorp points to the tree anchor
2535 numberp points to the current number for this tree
2536 max the maximum number permitted
2537 s the text of the option line, starting immediately after the name
2538 of the list type
2539 tname the name of the list type, for messages
2540
2541 Returns: nothing
2542 */
2543
2544 static void
2545 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2546 uschar *tname)
2547 {
2548 BOOL forcecache = FALSE;
2549 uschar *ss;
2550 tree_node *t;
2551 namedlist_block *nb = store_get(sizeof(namedlist_block));
2552
2553 if (Ustrncmp(s, "_cache", 6) == 0)
2554 {
2555 forcecache = TRUE;
2556 s += 6;
2557 }
2558
2559 if (!isspace(*s))
2560 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2561
2562 if (*numberp >= max)
2563 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2564 tname, max);
2565
2566 while (isspace(*s)) s++;
2567 ss = s;
2568 while (isalnum(*s) || *s == '_') s++;
2569 t = store_get(sizeof(tree_node) + s-ss);
2570 Ustrncpy(t->name, ss, s-ss);
2571 t->name[s-ss] = 0;
2572 while (isspace(*s)) s++;
2573
2574 if (!tree_insertnode(anchorp, t))
2575 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2576 "duplicate name \"%s\" for a named %s", t->name, tname);
2577
2578 t->data.ptr = nb;
2579 nb->number = *numberp;
2580 *numberp += 1;
2581
2582 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2583 "missing '=' after \"%s\"", t->name);
2584 while (isspace(*s)) s++;
2585 nb->string = read_string(s, t->name);
2586 nb->cache_data = NULL;
2587
2588 /* Check the string for any expansions; if any are found, mark this list
2589 uncacheable unless the user has explicited forced caching. */
2590
2591 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2592 }
2593
2594
2595
2596
2597 /*************************************************
2598 * Unpick data for a rate limit *
2599 *************************************************/
2600
2601 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2602 separate values.
2603
2604 Arguments:
2605 s string, in the form t,b,f,l
2606 where t is the threshold (integer)
2607 b is the initial delay (time)
2608 f is the multiplicative factor (fixed point)
2609 k is the maximum time (time)
2610 threshold where to store threshold
2611 base where to store base in milliseconds
2612 factor where to store factor in milliseconds
2613 limit where to store limit
2614
2615 Returns: nothing (panics on error)
2616 */
2617
2618 static void
2619 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2620 int *limit)
2621 {
2622 uschar bstring[16], lstring[16];
2623
2624 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2625 factor, lstring) == 4)
2626 {
2627 *base = readconf_readtime(bstring, 0, TRUE);
2628 *limit = readconf_readtime(lstring, 0, TRUE);
2629 if (*base >= 0 && *limit >= 0) return;
2630 }
2631 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2632 }
2633
2634
2635
2636
2637 /*************************************************
2638 * Read main configuration options *
2639 *************************************************/
2640
2641 /* This function is the first to be called for configuration reading. It
2642 opens the configuration file and reads general configuration settings until
2643 it reaches the end of the configuration section. The file is then left open so
2644 that the remaining configuration data can subsequently be read if needed for
2645 this run of Exim.
2646
2647 The configuration file must be owned either by root or exim, and be writeable
2648 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2649 in the config file, so the test is done on the compiled in values. A slight
2650 anomaly, to be carefully documented.
2651
2652 The name of the configuration file is taken from a list that is included in the
2653 binary of Exim. It can be altered from the command line, but if that is done,
2654 root privilege is immediately withdrawn unless the caller is root or exim.
2655 The first file on the list that exists is used.
2656
2657 For use on multiple systems that share file systems, first look for a
2658 configuration file whose name has the current node name on the end. If that is
2659 not found, try the generic name. For really contorted configurations, that run
2660 multiple Exims with different uid settings, first try adding the effective uid
2661 before the node name. These complications are going to waste resources on most
2662 systems. Therefore they are available only when requested by compile-time
2663 options. */
2664
2665 void
2666 readconf_main(void)
2667 {
2668 int sep = 0;
2669 struct stat statbuf;
2670 uschar *s, *filename;
2671 uschar *list = config_main_filelist;
2672
2673 /* Loop through the possible file names */
2674
2675 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2676 != NULL)
2677 {
2678 /* Cut out all the fancy processing unless specifically wanted */
2679
2680 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2681 uschar *suffix = filename + Ustrlen(filename);
2682
2683 /* Try for the node-specific file if a node name exists */
2684
2685 #ifdef CONFIGURE_FILE_USE_NODE
2686 struct utsname uts;
2687 if (uname(&uts) >= 0)
2688 {
2689 #ifdef CONFIGURE_FILE_USE_EUID
2690 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2691 config_file = Ufopen(filename, "rb");
2692 if (config_file == NULL)
2693 #endif /* CONFIGURE_FILE_USE_EUID */
2694 {
2695 sprintf(CS suffix, ".%.256s", uts.nodename);
2696 config_file = Ufopen(filename, "rb");
2697 }
2698 }
2699 #endif /* CONFIGURE_FILE_USE_NODE */
2700
2701 /* Otherwise, try the generic name, possibly with the euid added */
2702
2703 #ifdef CONFIGURE_FILE_USE_EUID
2704 if (config_file == NULL)
2705 {
2706 sprintf(CS suffix, ".%ld", (long int)original_euid);
2707 config_file = Ufopen(filename, "rb");
2708 }
2709 #endif /* CONFIGURE_FILE_USE_EUID */
2710
2711 /* Finally, try the unadorned name */
2712
2713 if (config_file == NULL)
2714 {
2715 *suffix = 0;
2716 config_file = Ufopen(filename, "rb");
2717 }
2718 #else /* if neither defined */
2719
2720 /* This is the common case when the fancy processing is not included. */
2721
2722 config_file = Ufopen(filename, "rb");
2723 #endif
2724
2725 /* If the file does not exist, continue to try any others. For any other
2726 error, break out (and die). */
2727
2728 if (config_file != NULL || errno != ENOENT) break;
2729 }
2730
2731 /* On success, save the name for verification; config_filename is used when
2732 logging configuration errors (it changes for .included files) whereas
2733 config_main_filename is the name shown by -bP. Failure to open a configuration
2734 file is a serious disaster. */
2735
2736 if (config_file != NULL)
2737 {
2738 config_filename = config_main_filename = string_copy(filename);
2739 }
2740 else
2741 {
2742 if (filename == NULL)
2743 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2744 "%s", config_main_filelist);
2745 else
2746 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2747 "configuration file %s", filename));
2748 }
2749
2750 /* Check the status of the file we have opened, unless it was specified on
2751 the command line, in which case privilege was given away at the start. */
2752
2753 if (!config_changed)
2754 {
2755 if (fstat(fileno(config_file), &statbuf) != 0)
2756 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2757 big_buffer);
2758
2759 if ((statbuf.st_uid != root_uid && /* owner not root */
2760 statbuf.st_uid != exim_uid /* owner not exim */
2761 #ifdef CONFIGURE_OWNER
2762 && statbuf.st_uid != config_uid /* owner not the special one */
2763 #endif
2764 ) || /* or */
2765 (statbuf.st_gid != exim_gid /* group not exim & */
2766 #ifdef CONFIGURE_GROUP
2767 && statbuf.st_gid != config_gid /* group not the special one */
2768 #endif
2769 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2770 /* or */
2771 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2772
2773 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2774 "wrong owner, group, or mode", big_buffer);
2775 }
2776
2777 /* Process the main configuration settings. They all begin with a lower case
2778 letter. If we see something starting with an upper case letter, it is taken as
2779 a macro definition. */
2780
2781 while ((s = get_config_line()) != NULL)
2782 {
2783 if (isupper(s[0])) read_macro_assignment(s);
2784
2785 else if (Ustrncmp(s, "domainlist", 10) == 0)
2786 read_named_list(&domainlist_anchor, &domainlist_count,
2787 MAX_NAMED_LIST, s+10, US"domain list");
2788
2789 else if (Ustrncmp(s, "hostlist", 8) == 0)
2790 read_named_list(&hostlist_anchor, &hostlist_count,
2791 MAX_NAMED_LIST, s+8, US"host list");
2792
2793 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2794 read_named_list(&addresslist_anchor, &addresslist_count,
2795 MAX_NAMED_LIST, s+11, US"address list");
2796
2797 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2798 read_named_list(&localpartlist_anchor, &localpartlist_count,
2799 MAX_NAMED_LIST, s+13, US"local part list");
2800
2801 else
2802 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2803 NULL, US"main option \"%s\" unknown");
2804 }
2805
2806
2807 /* If local_sender_retain is set, local_from_check must be unset. */
2808
2809 if (local_sender_retain && local_from_check)
2810 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2811 "local_sender_retain are set; this combination is not allowed");
2812
2813 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2814 wanted. */
2815
2816 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2817
2818 /* remote_max_parallel must be > 0 */
2819
2820 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2821
2822 /* The primary host name may be required for expansion of spool_directory
2823 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2824 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2825 canonize it. Some people like upper case letters in their host names, so we
2826 don't force the case. */
2827
2828 if (primary_hostname == NULL)
2829 {
2830 uschar *hostname;
2831 struct utsname uts;
2832 if (uname(&uts) < 0)
2833 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2834 hostname = US uts.nodename;
2835
2836 if (Ustrchr(hostname, '.') == NULL)
2837 {
2838 int af = AF_INET;
2839 struct hostent *hostdata;
2840
2841 #if HAVE_IPV6
2842 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2843 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2844 TRUE, NULL) != OK))
2845 af = AF_INET6;
2846 #else
2847 af = AF_INET;
2848 #endif
2849
2850 for (;;)
2851 {
2852 #if HAVE_IPV6
2853 #if HAVE_GETIPNODEBYNAME
2854 int error_num;
2855 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2856 #else
2857 hostdata = gethostbyname2(CS hostname, af);
2858 #endif
2859 #else
2860 hostdata = gethostbyname(CS hostname);
2861 #endif
2862
2863 if (hostdata != NULL)
2864 {
2865 hostname = US hostdata->h_name;
2866 break;
2867 }
2868
2869 if (af == AF_INET) break;
2870 af = AF_INET;
2871 }
2872 }
2873
2874 primary_hostname = string_copy(hostname);
2875 }
2876
2877 /* Set up default value for smtp_active_hostname */
2878
2879 smtp_active_hostname = primary_hostname;
2880
2881 /* If spool_directory wasn't set in the build-time configuration, it must have
2882 got set above. Of course, writing to the log may not work if log_file_path is
2883 not set, but it will at least get to syslog or somewhere, with any luck. */
2884
2885 if (*spool_directory == 0)
2886 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2887 "proceed");
2888
2889 /* Expand the spool directory name; it may, for example, contain the primary
2890 host name. Same comment about failure. */
2891
2892 s = expand_string(spool_directory);
2893 if (s == NULL)
2894 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2895 "\"%s\": %s", spool_directory, expand_string_message);
2896 spool_directory = s;
2897
2898 /* Expand log_file_path, which must contain "%s" in any component that isn't
2899 the null string or "syslog". It is also allowed to contain one instance of %D.
2900 However, it must NOT contain % followed by anything else. */
2901
2902 if (*log_file_path != 0)
2903 {
2904 uschar *ss, *sss;
2905 int sep = ':'; /* Fixed for log file path */
2906 s = expand_string(log_file_path);
2907 if (s == NULL)
2908 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2909 "\"%s\": %s", log_file_path, expand_string_message);
2910
2911 ss = s;
2912 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2913 {
2914 uschar *t;
2915 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2916 t = Ustrstr(sss, "%s");
2917 if (t == NULL)
2918 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2919 "contain \"%%s\"", sss);
2920 *t = 'X';
2921 t = Ustrchr(sss, '%');
2922 if (t != NULL)
2923 {
2924 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2925 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2926 "unexpected \"%%\" character", s);
2927 }
2928 }
2929
2930 log_file_path = s;
2931 }
2932
2933 /* Interpret syslog_facility into an integer argument for 'ident' param to
2934 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2935 leading "log_". */
2936
2937 if (syslog_facility_str != NULL)
2938 {
2939 int i;
2940 uschar *s = syslog_facility_str;
2941
2942 if ((Ustrlen(syslog_facility_str) >= 4) &&
2943 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2944 s += 4;
2945
2946 for (i = 0; i < syslog_list_size; i++)
2947 {
2948 if (strcmpic(s, syslog_list[i].name) == 0)
2949 {
2950 syslog_facility = syslog_list[i].value;
2951 break;
2952 }
2953 }
2954
2955 if (i >= syslog_list_size)
2956 {
2957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2958 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2959 }
2960 }
2961
2962 /* Expand pid_file_path */
2963
2964 if (*pid_file_path != 0)
2965 {
2966 s = expand_string(pid_file_path);
2967 if (s == NULL)
2968 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2969 "\"%s\": %s", pid_file_path, expand_string_message);
2970 pid_file_path = s;
2971 }
2972
2973 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2974 message. */
2975
2976 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2977
2978 /* Unpick the SMTP rate limiting options, if set */
2979
2980 if (smtp_ratelimit_mail != NULL)
2981 {
2982 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2983 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2984 }
2985
2986 if (smtp_ratelimit_rcpt != NULL)
2987 {
2988 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
2989 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
2990 }
2991
2992 /* The qualify domains default to the primary host name */
2993
2994 if (qualify_domain_sender == NULL)
2995 qualify_domain_sender = primary_hostname;
2996 if (qualify_domain_recipient == NULL)
2997 qualify_domain_recipient = qualify_domain_sender;
2998
2999 /* Setting system_filter_user in the configuration sets the gid as well if a
3000 name is given, but a numerical value does not. */
3001
3002 if (system_filter_uid_set && !system_filter_gid_set)
3003 {
3004 struct passwd *pw = getpwuid(system_filter_uid);
3005 if (pw == NULL)
3006 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3007 (long int)system_filter_uid);
3008 system_filter_gid = pw->pw_gid;
3009 system_filter_gid_set = TRUE;
3010 }
3011
3012 /* If the errors_reply_to field is set, check that it is syntactically valid
3013 and ensure it contains a domain. */
3014
3015 if (errors_reply_to != NULL)
3016 {
3017 uschar *errmess;
3018 int start, end, domain;
3019 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3020 &start, &end, &domain, FALSE);
3021
3022 if (recipient == NULL)
3023 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3024 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3025
3026 if (domain == 0)
3027 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3028 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3029 }
3030
3031 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3032 smtp_accept_max must also be set. */
3033
3034 if (smtp_accept_max == 0 &&
3035 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3036 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3037 "smtp_accept_max must be set if smtp_accept_queue or "
3038 "smtp_accept_max_per_host is set");
3039
3040 /* Set up the host number if anything is specified. It is an expanded string
3041 so that it can be computed from the host name, for example. We do this last
3042 so as to ensure that everything else is set up before the expansion. */
3043
3044 if (host_number_string != NULL)
3045 {
3046 uschar *end;
3047 uschar *s = expand_string(host_number_string);
3048 long int n = Ustrtol(s, &end, 0);
3049 while (isspace(*end)) end++;
3050 if (*end != 0)
3051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3052 "localhost_number value is not a number: %s", s);
3053 if (n > LOCALHOST_MAX)
3054 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3055 "localhost_number is greater than the maximum allowed value (%d)",
3056 LOCALHOST_MAX);
3057 host_number = n;
3058 }
3059
3060 #ifdef SUPPORT_TLS
3061 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3062
3063 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3064 tls_verify_certificates == NULL)
3065 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3066 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3067 (tls_verify_hosts != NULL)? "" : "try_");
3068 #endif
3069 }
3070
3071
3072
3073 /*************************************************
3074 * Initialize one driver *
3075 *************************************************/
3076
3077 /* This is called once the driver's generic options, if any, have been read.
3078 We can now find the driver, set up defaults for the private options, and
3079 unset any "set" bits in the private options table (which might have been
3080 set by another incarnation of the same driver).
3081
3082 Arguments:
3083 d pointer to driver instance block, with generic
3084 options filled in
3085 drivers_available vector of available drivers
3086 size_of_info size of each block in drivers_available
3087 class class of driver, for error message
3088
3089 Returns: pointer to the driver info block
3090 */
3091
3092 static driver_info *
3093 init_driver(driver_instance *d, driver_info *drivers_available,
3094 int size_of_info, uschar *class)
3095 {
3096 driver_info *dd;
3097
3098 for (dd = drivers_available; dd->driver_name[0] != 0;
3099 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3100 {
3101 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3102 {
3103 int i;
3104 int len = dd->options_len;
3105 d->info = dd;
3106 d->options_block = store_get(len);
3107 memcpy(d->options_block, dd->options_block, len);
3108 for (i = 0; i < *(dd->options_count); i++)
3109 dd->options[i].type &= ~opt_set;
3110 return dd;
3111 }
3112 }
3113
3114 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3115 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3116
3117 return NULL; /* never obeyed */
3118 }
3119
3120
3121
3122
3123 /*************************************************
3124 * Initialize driver list *
3125 *************************************************/
3126
3127 /* This function is called for routers, transports, and authentication
3128 mechanisms. It reads the data from the current point in the configuration file
3129 up to the end of the section, and sets up a chain of instance blocks according
3130 to the file's contents. The file will already have been opened by a call to
3131 readconf_main, and must be left open for subsequent reading of further data.
3132
3133 Any errors cause a panic crash. Note that the blocks with names driver_info and
3134 driver_instance must map the first portions of all the _info and _instance
3135 blocks for this shared code to work.
3136
3137 Arguments:
3138 class "router", "transport", or "authenticator"
3139 anchor &routers, &transports, &auths
3140 drivers_available available drivers
3141 size_of_info size of each info block
3142 instance_default points to default data for an instance
3143 instance_size size of instance block
3144 driver_optionlist generic option list
3145 driver_optionlist_count count of generic option list
3146
3147 Returns: nothing
3148 */
3149
3150 void
3151 readconf_driver_init(
3152 uschar *class,
3153 driver_instance **anchor,
3154 driver_info *drivers_available,
3155 int size_of_info,
3156 void *instance_default,
3157 int instance_size,
3158 optionlist *driver_optionlist,
3159 int driver_optionlist_count)
3160 {
3161 driver_instance **p = anchor;
3162 driver_instance *d = NULL;
3163 uschar *buffer;
3164
3165 while ((buffer = get_config_line()) != NULL)
3166 {
3167 uschar name[64];
3168 uschar *s;
3169
3170 /* Read the first name on the line and test for the start of a new driver. A
3171 macro definition indicates the end of the previous driver. If this isn't the
3172 start of a new driver, the line will be re-read. */
3173
3174 s = readconf_readname(name, sizeof(name), buffer);
3175
3176 /* Handle macro definition, first finishing off the initialization of the
3177 previous driver, if any. */
3178
3179 if (isupper(*name) && *s == '=')
3180 {
3181 if (d != NULL)
3182 {
3183 if (d->driver_name == NULL)
3184 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3185 "no driver defined for %s \"%s\"", class, d->name);
3186 (d->info->init)(d);
3187 d = NULL;
3188 }
3189 read_macro_assignment(buffer);
3190 continue;
3191 }
3192
3193 /* If the line starts with a name terminated by a colon, we are at the
3194 start of the definition of a new driver. The rest of the line must be
3195 blank. */
3196
3197 if (*s++ == ':')
3198 {
3199 int i;
3200
3201 /* Finish off initializing the previous driver. */
3202
3203 if (d != NULL)
3204 {
3205 if (d->driver_name == NULL)
3206 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3207 "no driver defined for %s \"%s\"", class, d->name);
3208 (d->info->init)(d);
3209 }
3210
3211 /* Check that we haven't already got a driver of this name */
3212
3213 for (d = *anchor; d != NULL; d = d->next)
3214 if (Ustrcmp(name, d->name) == 0)
3215 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3216 "there are two %ss called \"%s\"", class, name);
3217
3218 /* Set up a new driver instance data block on the chain, with
3219 its default values installed. */
3220
3221 d = store_get(instance_size);
3222 memcpy(d, instance_default, instance_size);
3223 *p = d;
3224 p = &(d->next);
3225 d->name = string_copy(name);
3226
3227 /* Clear out the "set" bits in the generic options */
3228
3229 for (i = 0; i < driver_optionlist_count; i++)
3230 driver_optionlist[i].type &= ~opt_set;
3231
3232 /* Check nothing more on this line, then do the next loop iteration. */
3233
3234 while (isspace(*s)) s++;
3235 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3236 continue;
3237 }
3238
3239 /* Not the start of a new driver. Give an error if we have not set up a
3240 current driver yet. */
3241
3242 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3243 "%s name missing", class);
3244
3245 /* First look to see if this is a generic option; if it is "driver",
3246 initialize the driver. If is it not a generic option, we can look for a
3247 private option provided that the driver has been previously set up. */
3248
3249 if (readconf_handle_option(buffer, driver_optionlist,
3250 driver_optionlist_count, d, NULL))
3251 {
3252 if (d->info == NULL && d->driver_name != NULL)
3253 init_driver(d, drivers_available, size_of_info, class);
3254 }
3255
3256 /* Handle private options - pass the generic block because some may
3257 live therein. A flag with each option indicates if it is in the public
3258 block. */
3259
3260 else if (d->info != NULL)
3261 {
3262 readconf_handle_option(buffer, d->info->options,
3263 *(d->info->options_count), d, US"option \"%s\" unknown");
3264 }
3265
3266 /* The option is not generic and the driver name has not yet been given. */
3267
3268 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3269 "(\"driver\" must be specified before any private options)", name);
3270 }
3271
3272 /* Run the initialization function for the final driver. */
3273
3274 if (d != NULL)
3275 {
3276 if (d->driver_name == NULL)
3277 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3278 "no driver defined for %s \"%s\"", class, d->name);
3279 (d->info->init)(d);
3280 }
3281 }
3282
3283
3284
3285 /*************************************************
3286 * Check driver dependency *
3287 *************************************************/
3288
3289 /* This function is passed a driver instance and a string. It checks whether
3290 any of the string options for the driver contains the given string as an
3291 expansion variable.
3292
3293 Arguments:
3294 d points to a driver instance block
3295 s the string to search for
3296
<