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Added lots of "(void)" casts to standard function calls.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.11 2005/06/27 14:29:43 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2005 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* Functions for reading the configuration file, and for displaying
11 overall configuration values. Thanks to Brian Candler for the original
12 implementation of the conditional .ifdef etc. */
13
14 #include "exim.h"
15
16 #define CSTATE_STACK_SIZE 10
17
18
19 /* Structure for chain (stack) of .included files */
20
21 typedef struct config_file_item {
22 struct config_file_item *next;
23 uschar *filename;
24 FILE *file;
25 int lineno;
26 } config_file_item;
27
28 /* Structure of table of conditional words and their state transitions */
29
30 typedef struct cond_item {
31 uschar *name;
32 int namelen;
33 int action1;
34 int action2;
35 int pushpop;
36 } cond_item;
37
38 /* Structure of table of syslog facility names and values */
39
40 typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43 } syslog_fac_item;
44
45
46 /* Static variables */
47
48 static config_file_item *config_file_stack = NULL; /* For includes */
49
50 static uschar *syslog_facility_str = NULL;
51 static uschar next_section[24];
52 static uschar time_buffer[24];
53
54 /* State variables for conditional loading (.ifdef / .else / .endif) */
55
56 static int cstate = 0;
57 static int cstate_stack_ptr = -1;
58 static int cstate_stack[CSTATE_STACK_SIZE];
59
60 /* Table of state transitions for handling conditional inclusions. There are
61 four possible state transitions:
62
63 .ifdef true
64 .ifdef false
65 .elifdef true (or .else)
66 .elifdef false
67
68 .endif just causes the previous cstate to be popped off the stack */
69
70 static int next_cstate[3][4] =
71 {
72 /* State 0: reading from file, or reading until next .else or .endif */
73 { 0, 1, 2, 2 },
74 /* State 1: condition failed, skipping until next .else or .endif */
75 { 2, 2, 0, 1 },
76 /* State 2: skipping until .endif */
77 { 2, 2, 2, 2 },
78 };
79
80 /* Table of conditionals and the states to set. For each name, there are four
81 values: the length of the name (to save computing it each time), the state to
82 set if a macro was found in the line, the state to set if a macro was not found
83 in the line, and a stack manipulation setting which is:
84
85 -1 pull state value off the stack
86 0 don't alter the stack
87 +1 push value onto stack, before setting new state
88 */
89
90 static cond_item cond_list[] = {
91 { US"ifdef", 5, 0, 1, 1 },
92 { US"ifndef", 6, 1, 0, 1 },
93 { US"elifdef", 7, 2, 3, 0 },
94 { US"elifndef", 8, 3, 2, 0 },
95 { US"else", 4, 2, 2, 0 },
96 { US"endif", 5, 0, 0, -1 }
97 };
98
99 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101 /* Table of syslog facility names and their values */
102
103 static syslog_fac_item syslog_list[] = {
104 { US"mail", LOG_MAIL },
105 { US"user", LOG_USER },
106 { US"news", LOG_NEWS },
107 { US"uucp", LOG_UUCP },
108 { US"local0", LOG_LOCAL0 },
109 { US"local1", LOG_LOCAL1 },
110 { US"local2", LOG_LOCAL2 },
111 { US"local3", LOG_LOCAL3 },
112 { US"local4", LOG_LOCAL4 },
113 { US"local5", LOG_LOCAL5 },
114 { US"local6", LOG_LOCAL6 },
115 { US"local7", LOG_LOCAL7 },
116 { US"daemon", LOG_DAEMON }
117 };
118
119 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
120
121
122
123
124 /*************************************************
125 * Main configuration options *
126 *************************************************/
127
128 /* The list of options that can be set in the main configuration file. This
129 must be in alphabetic order because it is searched by binary chop. */
130
131 static optionlist optionlist_config[] = {
132 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
133 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
134 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
135 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
136 { "accept_8bitmime", opt_bool, &accept_8bitmime },
137 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
138 #ifdef WITH_CONTENT_SCAN
139 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
140 #endif
141 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
142 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
143 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
144 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
145 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
146 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
147 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
148 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
149 #ifdef WITH_CONTENT_SCAN
150 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
151 #endif
152 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
153 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
154 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
155 #ifdef SUPPORT_TLS
156 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
157 #endif
158 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
159 { "admin_groups", opt_gidlist, &admin_groups },
160 { "allow_domain_literals", opt_bool, &allow_domain_literals },
161 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
162 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
163 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
164 { "auto_thaw", opt_time, &auto_thaw },
165 #ifdef WITH_CONTENT_SCAN
166 { "av_scanner", opt_stringptr, &av_scanner },
167 #endif
168 { "bi_command", opt_stringptr, &bi_command },
169 #ifdef EXPERIMENTAL_BRIGHTMAIL
170 { "bmi_config_file", opt_stringptr, &bmi_config_file },
171 #endif
172 { "bounce_message_file", opt_stringptr, &bounce_message_file },
173 { "bounce_message_text", opt_stringptr, &bounce_message_text },
174 { "bounce_return_body", opt_bool, &bounce_return_body },
175 { "bounce_return_message", opt_bool, &bounce_return_message },
176 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
177 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
178 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
179 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
180 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
181 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
182 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
183 { "check_log_inodes", opt_int, &check_log_inodes },
184 { "check_log_space", opt_Kint, &check_log_space },
185 { "check_spool_inodes", opt_int, &check_spool_inodes },
186 { "check_spool_space", opt_Kint, &check_spool_space },
187 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
188 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
189 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
190 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
191 { "delay_warning", opt_timelist, &delay_warning },
192 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
193 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
194 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
195 { "delivery_date_remove", opt_bool, &delivery_date_remove },
196 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
197 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
198 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
199 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
200 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
201 { "dns_retrans", opt_time, &dns_retrans },
202 { "dns_retry", opt_int, &dns_retry },
203 /* This option is now a no-op, retained for compability */
204 { "drop_cr", opt_bool, &drop_cr },
205 /*********************************************************/
206 { "envelope_to_remove", opt_bool, &envelope_to_remove },
207 { "errors_copy", opt_stringptr, &errors_copy },
208 { "errors_reply_to", opt_stringptr, &errors_reply_to },
209 { "exim_group", opt_gid, &exim_gid },
210 { "exim_path", opt_stringptr, &exim_path },
211 { "exim_user", opt_uid, &exim_uid },
212 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
213 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
214 { "finduser_retries", opt_int, &finduser_retries },
215 { "freeze_tell", opt_stringptr, &freeze_tell },
216 { "gecos_name", opt_stringptr, &gecos_name },
217 { "gecos_pattern", opt_stringptr, &gecos_pattern },
218 { "header_line_maxsize", opt_int, &header_line_maxsize },
219 { "header_maxsize", opt_int, &header_maxsize },
220 { "headers_charset", opt_stringptr, &headers_charset },
221 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
222 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
223 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
224 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
225 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
226 { "hold_domains", opt_stringptr, &hold_domains },
227 { "host_lookup", opt_stringptr, &host_lookup },
228 { "host_lookup_order", opt_stringptr, &host_lookup_order },
229 { "host_reject_connection", opt_stringptr, &host_reject_connection },
230 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
231 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
232 #ifdef LOOKUP_IBASE
233 { "ibase_servers", opt_stringptr, &ibase_servers },
234 #endif
235 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
236 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
237 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
238 { "keep_malformed", opt_time, &keep_malformed },
239 #ifdef LOOKUP_LDAP
240 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
241 { "ldap_version", opt_int, &eldap_version },
242 #endif
243 { "local_from_check", opt_bool, &local_from_check },
244 { "local_from_prefix", opt_stringptr, &local_from_prefix },
245 { "local_from_suffix", opt_stringptr, &local_from_suffix },
246 { "local_interfaces", opt_stringptr, &local_interfaces },
247 { "local_scan_timeout", opt_time, &local_scan_timeout },
248 { "local_sender_retain", opt_bool, &local_sender_retain },
249 { "localhost_number", opt_stringptr, &host_number_string },
250 { "log_file_path", opt_stringptr, &log_file_path },
251 { "log_selector", opt_stringptr, &log_selector_string },
252 { "log_timezone", opt_bool, &log_timezone },
253 { "lookup_open_max", opt_int, &lookup_open_max },
254 { "max_username_length", opt_int, &max_username_length },
255 { "message_body_visible", opt_mkint, &message_body_visible },
256 { "message_id_header_domain", opt_stringptr, &message_id_domain },
257 { "message_id_header_text", opt_stringptr, &message_id_text },
258 { "message_logs", opt_bool, &message_logs },
259 { "message_size_limit", opt_stringptr, &message_size_limit },
260 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
261 { "move_frozen_messages", opt_bool, &move_frozen_messages },
262 #endif
263 { "mua_wrapper", opt_bool, &mua_wrapper },
264 #ifdef LOOKUP_MYSQL
265 { "mysql_servers", opt_stringptr, &mysql_servers },
266 #endif
267 { "never_users", opt_uidlist, &never_users },
268 #ifdef LOOKUP_ORACLE
269 { "oracle_servers", opt_stringptr, &oracle_servers },
270 #endif
271 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
272 #ifdef EXIM_PERL
273 { "perl_at_start", opt_bool, &opt_perl_at_start },
274 { "perl_startup", opt_stringptr, &opt_perl_startup },
275 #endif
276 #ifdef LOOKUP_PGSQL
277 { "pgsql_servers", opt_stringptr, &pgsql_servers },
278 #endif
279 { "pid_file_path", opt_stringptr, &pid_file_path },
280 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
281 { "preserve_message_logs", opt_bool, &preserve_message_logs },
282 { "primary_hostname", opt_stringptr, &primary_hostname },
283 { "print_topbitchars", opt_bool, &print_topbitchars },
284 { "process_log_path", opt_stringptr, &process_log_path },
285 { "prod_requires_admin", opt_bool, &prod_requires_admin },
286 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
287 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
288 { "queue_domains", opt_stringptr, &queue_domains },
289 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
290 { "queue_only", opt_bool, &queue_only },
291 { "queue_only_file", opt_stringptr, &queue_only_file },
292 { "queue_only_load", opt_fixed, &queue_only_load },
293 { "queue_only_override", opt_bool, &queue_only_override },
294 { "queue_run_in_order", opt_bool, &queue_run_in_order },
295 { "queue_run_max", opt_int, &queue_run_max },
296 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
297 { "receive_timeout", opt_time, &receive_timeout },
298 { "received_header_text", opt_stringptr, &received_header_text },
299 { "received_headers_max", opt_int, &received_headers_max },
300 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
301 { "recipients_max", opt_int, &recipients_max },
302 { "recipients_max_reject", opt_bool, &recipients_max_reject },
303 { "remote_max_parallel", opt_int, &remote_max_parallel },
304 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
305 { "retry_data_expire", opt_time, &retry_data_expire },
306 { "retry_interval_max", opt_time, &retry_interval_max },
307 { "return_path_remove", opt_bool, &return_path_remove },
308 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
309 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
310 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
311 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
312 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
313 { "smtp_accept_max", opt_int, &smtp_accept_max },
314 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
315 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
316 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
317 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
318 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
319 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
320 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
321 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
322 { "smtp_banner", opt_stringptr, &smtp_banner },
323 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
324 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
325 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
326 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
327 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
328 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
329 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
330 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
331 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
332 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
333 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
334 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
335 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
336 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
337 #ifdef WITH_CONTENT_SCAN
338 { "spamd_address", opt_stringptr, &spamd_address },
339 #endif
340 { "split_spool_directory", opt_bool, &split_spool_directory },
341 { "spool_directory", opt_stringptr, &spool_directory },
342 #ifdef EXPERIMENTAL_SRS
343 { "srs_config", opt_stringptr, &srs_config },
344 { "srs_hashlength", opt_int, &srs_hashlength },
345 { "srs_hashmin", opt_int, &srs_hashmin },
346 { "srs_maxage", opt_int, &srs_maxage },
347 { "srs_secrets", opt_stringptr, &srs_secrets },
348 { "srs_usehash", opt_bool, &srs_usehash },
349 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
350 #endif
351 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
352 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
353 { "syslog_duplication", opt_bool, &syslog_duplication },
354 { "syslog_facility", opt_stringptr, &syslog_facility_str },
355 { "syslog_processname", opt_stringptr, &syslog_processname },
356 { "syslog_timestamp", opt_bool, &syslog_timestamp },
357 { "system_filter", opt_stringptr, &system_filter },
358 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
359 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
360 { "system_filter_group", opt_gid, &system_filter_gid },
361 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
362 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
363 { "system_filter_user", opt_uid, &system_filter_uid },
364 { "tcp_nodelay", opt_bool, &tcp_nodelay },
365 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
366 { "timezone", opt_stringptr, &timezone_string },
367 #ifdef SUPPORT_TLS
368 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
369 { "tls_certificate", opt_stringptr, &tls_certificate },
370 { "tls_crl", opt_stringptr, &tls_crl },
371 { "tls_dhparam", opt_stringptr, &tls_dhparam },
372 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
373 { "tls_privatekey", opt_stringptr, &tls_privatekey },
374 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
375 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
376 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
377 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
378 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
379 #endif
380 { "trusted_groups", opt_gidlist, &trusted_groups },
381 { "trusted_users", opt_uidlist, &trusted_users },
382 { "unknown_login", opt_stringptr, &unknown_login },
383 { "unknown_username", opt_stringptr, &unknown_username },
384 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
385 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
386 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
387 { "warn_message_file", opt_stringptr, &warn_message_file },
388 { "write_rejectlog", opt_bool, &write_rejectlog }
389 };
390
391 static int optionlist_config_size =
392 sizeof(optionlist_config)/sizeof(optionlist);
393
394
395
396 /*************************************************
397 * Find the name of an option *
398 *************************************************/
399
400 /* This function is to aid debugging. Various functions take arguments that are
401 pointer variables in the options table or in option tables for various drivers.
402 For debugging output, it is useful to be able to find the name of the option
403 which is currently being processed. This function finds it, if it exists, by
404 searching the table(s).
405
406 Arguments: a value that is presumed to be in the table above
407 Returns: the option name, or an empty string
408 */
409
410 uschar *
411 readconf_find_option(void *p)
412 {
413 int i;
414 router_instance *r;
415 transport_instance *t;
416
417 for (i = 0; i < optionlist_config_size; i++)
418 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
419
420 for (r = routers; r != NULL; r = r->next)
421 {
422 router_info *ri = r->info;
423 for (i = 0; i < ri->options_count[0]; i++)
424 {
425 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
426 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
427 return US ri->options[i].name;
428 }
429 }
430
431 for (t = transports; t != NULL; t = t->next)
432 {
433 transport_info *ti = t->info;
434 for (i = 0; i < ti->options_count[0]; i++)
435 {
436 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
437 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
438 return US ti->options[i].name;
439 }
440 }
441
442 return US"";
443 }
444
445
446
447
448 /*************************************************
449 * Deal with an assignment to a macro *
450 *************************************************/
451
452 /* This function is called when a line that starts with an upper case letter is
453 encountered. The argument "line" should contain a complete logical line, and
454 start with the first letter of the macro name. The macro name and the
455 replacement text are extracted and stored. Redefinition of existing,
456 non-command line, macros is permitted using '==' instead of '='.
457
458 Arguments:
459 s points to the start of the logical line
460
461 Returns: nothing
462 */
463
464 static void
465 read_macro_assignment(uschar *s)
466 {
467 uschar name[64];
468 int namelen = 0;
469 BOOL redef = FALSE;
470 macro_item *m;
471 macro_item *mlast = NULL;
472
473 while (isalnum(*s) || *s == '_')
474 {
475 if (namelen >= sizeof(name) - 1)
476 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
477 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
478 name[namelen++] = *s++;
479 }
480 name[namelen] = 0;
481
482 while (isspace(*s)) s++;
483 if (*s++ != '=')
484 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
485
486 if (*s == '=')
487 {
488 redef = TRUE;
489 s++;
490 }
491 while (isspace(*s)) s++;
492
493 /* If an existing macro of the same name was defined on the command line, we
494 just skip this definition. It's an error to attempt to redefine a macro without
495 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
496 It is also an error to define a macro whose name begins with the name of a
497 previously defined macro. Note: it is documented that the other way round
498 works. */
499
500 for (m = macros; m != NULL; m = m->next)
501 {
502 int len = Ustrlen(m->name);
503
504 if (Ustrcmp(m->name, name) == 0)
505 {
506 if (!m->command_line && !redef)
507 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
508 "defined (use \"==\" if you want to redefine it", name);
509 break;
510 }
511
512 if (len < namelen && Ustrstr(name, m->name) != NULL)
513 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
514 "a macro because previously defined macro \"%s\" is a substring",
515 name, m->name);
516
517 /* We cannot have this test, because it is documented that a substring
518 macro is permitted (there is even an example).
519 *
520 * if (len > namelen && Ustrstr(m->name, name) != NULL)
521 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
522 * "a macro because it is a substring of previously defined macro \"%s\"",
523 * name, m->name);
524 */
525
526 mlast = m;
527 }
528
529 /* Check for an overriding command-line definition. */
530
531 if (m != NULL && m->command_line) return;
532
533 /* Redefinition must refer to an existing macro. */
534
535 if (redef)
536 {
537 if (m == NULL)
538 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
539 "\"%s\"", name);
540 }
541
542 /* We have a new definition. The macro_item structure includes a final vector
543 called "name" which is one byte long. Thus, adding "namelen" gives us enough
544 room to store the "name" string. */
545
546 else
547 {
548 m = store_get(sizeof(macro_item) + namelen);
549 if (macros == NULL) macros = m; else mlast->next = m;
550 Ustrncpy(m->name, name, namelen);
551 m->name[namelen] = 0;
552 m->next = NULL;
553 m->command_line = FALSE;
554 }
555
556 /* Set the value of the new or redefined macro */
557
558 m->replacement = string_copy(s);
559 }
560
561
562
563
564
565 /*************************************************
566 * Read configuration line *
567 *************************************************/
568
569 /* A logical line of text is read from the configuration file into the big
570 buffer, taking account of macros, .includes, and continuations. The size of
571 big_buffer is increased if necessary. The count of configuration lines is
572 maintained. Physical input lines starting with # (ignoring leading white space,
573 and after macro replacement) and empty logical lines are always ignored.
574 Leading and trailing spaces are removed.
575
576 If we hit a line of the form "begin xxxx", the xxxx is placed in the
577 next_section vector, and the function returns NULL, indicating the end of a
578 configuration section. On end-of-file, NULL is returned with next_section
579 empty.
580
581 Arguments: none
582
583 Returns: a pointer to the first non-blank in the line,
584 or NULL if eof or end of section is reached
585 */
586
587 static uschar *
588 get_config_line(void)
589 {
590 int startoffset = 0; /* To first non-blank char in logical line */
591 int len = 0; /* Of logical line so far */
592 int newlen;
593 uschar *s, *ss;
594 macro_item *m;
595 BOOL macro_found;
596
597 /* Loop for handling continuation lines, skipping comments, and dealing with
598 .include files. */
599
600 for (;;)
601 {
602 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
603 {
604 if (config_file_stack != NULL) /* EOF inside .include */
605 {
606 (void)fclose(config_file);
607 config_file = config_file_stack->file;
608 config_filename = config_file_stack->filename;
609 config_lineno = config_file_stack->lineno;
610 config_file_stack = config_file_stack->next;
611 continue;
612 }
613
614 /* EOF at top level */
615
616 if (cstate_stack_ptr >= 0)
617 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
618 "Unexpected end of configuration file: .endif missing");
619
620 if (len != 0) break; /* EOF after continuation */
621 next_section[0] = 0; /* EOF at start of logical line */
622 return NULL;
623 }
624
625 config_lineno++;
626 newlen = len + Ustrlen(big_buffer + len);
627
628 /* Handle pathologically long physical lines - yes, it did happen - by
629 extending big_buffer at this point. The code also copes with very long
630 logical lines. */
631
632 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
633 {
634 uschar *newbuffer;
635 big_buffer_size += BIG_BUFFER_SIZE;
636 newbuffer = store_malloc(big_buffer_size);
637
638 /* This use of strcpy is OK because we know that the string in the old
639 buffer is shorter than the new buffer. */
640
641 Ustrcpy(newbuffer, big_buffer);
642 store_free(big_buffer);
643 big_buffer = newbuffer;
644 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
645 break;
646 newlen += Ustrlen(big_buffer + newlen);
647 }
648
649 /* Find the true start of the physical line - leading spaces are always
650 ignored. */
651
652 ss = big_buffer + len;
653 while (isspace(*ss)) ss++;
654
655 /* Process the physical line for macros. If this is the start of the logical
656 line, skip over initial text at the start of the line if it starts with an
657 upper case character followed by a sequence of name characters and an equals
658 sign, because that is the definition of a new macro, and we don't do
659 replacement therein. */
660
661 s = ss;
662 if (len == 0 && isupper(*s))
663 {
664 while (isalnum(*s) || *s == '_') s++;
665 while (isspace(*s)) s++;
666 if (*s != '=') s = ss; /* Not a macro definition */
667 }
668
669 /* For each defined macro, scan the line (from after XXX= if present),
670 replacing all occurrences of the macro. */
671
672 macro_found = FALSE;
673 for (m = macros; m != NULL; m = m->next)
674 {
675 uschar *p, *pp;
676 uschar *t = s;
677
678 while ((p = Ustrstr(t, m->name)) != NULL)
679 {
680 int moveby;
681 int namelen = Ustrlen(m->name);
682 int replen = Ustrlen(m->replacement);
683
684 /* Expand the buffer if necessary */
685
686 while (newlen - namelen + replen + 1 > big_buffer_size)
687 {
688 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
689 uschar *newbuffer = store_malloc(newsize);
690 memcpy(newbuffer, big_buffer, newlen + 1);
691 p = newbuffer + (p - big_buffer);
692 s = newbuffer + (s - big_buffer);
693 ss = newbuffer + (ss - big_buffer);
694 t = newbuffer + (t - big_buffer);
695 big_buffer_size = newsize;
696 store_free(big_buffer);
697 big_buffer = newbuffer;
698 }
699
700 /* Shuffle the remaining characters up or down in the buffer before
701 copying in the replacement text. Don't rescan the replacement for this
702 same macro. */
703
704 pp = p + namelen;
705 moveby = replen - namelen;
706 if (moveby != 0)
707 {
708 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
709 newlen += moveby;
710 }
711 Ustrncpy(p, m->replacement, replen);
712 t = p + replen;
713 macro_found = TRUE;
714 }
715 }
716
717 /* An empty macro replacement at the start of a line could mean that ss no
718 longer points to the first non-blank character. */
719
720 while (isspace(*ss)) ss++;
721
722 /* Check for comment lines - these are physical lines. */
723
724 if (*ss == '#') continue;
725
726 /* Handle conditionals, which are also applied to physical lines. Conditions
727 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
728 expansion occured on the rest of the line. A preliminary test for the leading
729 '.' saves effort on most lines. */
730
731 if (*ss == '.')
732 {
733 int i;
734
735 /* Search the list of conditional directives */
736
737 for (i = 0; i < cond_list_size; i++)
738 {
739 int n;
740 cond_item *c = cond_list+i;
741 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
742
743 /* The following character must be white space or end of string */
744
745 n = ss[1 + c->namelen];
746 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
747
748 /* .ifdef and .ifndef push the current state onto the stack, then set
749 a new one from the table. Stack overflow is an error */
750
751 if (c->pushpop > 0)
752 {
753 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
754 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
755 ".%s nested too deeply", c->name);
756 cstate_stack[++cstate_stack_ptr] = cstate;
757 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
758 }
759
760 /* For any of the others, stack underflow is an error. The next state
761 comes either from the stack (.endif) or from the table. */
762
763 else
764 {
765 if (cstate_stack_ptr < 0)
766 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
767 ".%s without matching .ifdef", c->name);
768 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
769 next_cstate[cstate][macro_found? c->action1 : c->action2];
770 }
771
772 /* Having dealt with a directive, break the loop */
773
774 break;
775 }
776
777 /* If we have handled a conditional directive, continue with the next
778 physical line. Otherwise, fall through. */
779
780 if (i < cond_list_size) continue;
781 }
782
783 /* If the conditional state is not 0 (actively using these lines), ignore
784 this input line. */
785
786 if (cstate != 0) continue; /* Conditional skip */
787
788 /* Handle .include lines - these are also physical lines. */
789
790 if (Ustrncmp(ss, ".include", 8) == 0 &&
791 (isspace(ss[8]) ||
792 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
793 {
794 uschar *t;
795 int include_if_exists = isspace(ss[8])? 0 : 10;
796 config_file_item *save;
797 struct stat statbuf;
798
799 ss += 9 + include_if_exists;
800 while (isspace(*ss)) ss++;
801 t = ss + Ustrlen(ss);
802 while (t > ss && isspace(t[-1])) t--;
803 if (*ss == '\"' && t[-1] == '\"')
804 {
805 ss++;
806 t--;
807 }
808 *t = 0;
809
810 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
811
812 save = store_get(sizeof(config_file_item));
813 save->next = config_file_stack;
814 config_file_stack = save;
815 save->file = config_file;
816 save->filename = config_filename;
817 save->lineno = config_lineno;
818
819 config_file = Ufopen(ss, "rb");
820 if (config_file == NULL)
821 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
822 "configuration file %s", ss);
823 config_filename = string_copy(ss);
824 config_lineno = 0;
825 continue;
826 }
827
828 /* If this is the start of the logical line, remember where the non-blank
829 data starts. Otherwise shuffle down continuation lines to remove leading
830 white space. */
831
832 if (len == 0)
833 startoffset = ss - big_buffer;
834 else
835 {
836 s = big_buffer + len;
837 if (ss > s)
838 {
839 memmove(s, ss, (newlen - len) - (ss - s) + 1);
840 newlen -= ss - s;
841 }
842 }
843
844 /* Accept the new addition to the line. Remove trailing white space. */
845
846 len = newlen;
847 while (len > 0 && isspace(big_buffer[len-1])) len--;
848 big_buffer[len] = 0;
849
850 /* We are done if the line does not end in backslash and contains some data.
851 Empty logical lines are ignored. For continuations, remove the backslash and
852 go round the loop to read the continuation line. */
853
854 if (len > 0)
855 {
856 if (big_buffer[len-1] != '\\') break; /* End of logical line */
857 big_buffer[--len] = 0; /* Remove backslash */
858 }
859 } /* Loop for reading multiple physical lines */
860
861 /* We now have a logical line. Test for the end of a configuration section (or,
862 more accurately, for the start of the next section). Place the name of the next
863 section in next_section, and return NULL. If the name given is longer than
864 next_section, truncate it. It will be unrecognized later, because all the known
865 section names do fit. Leave space for pluralizing. */
866
867 s = big_buffer + startoffset; /* First non-space character */
868 if (strncmpic(s, US"begin ", 6) == 0)
869 {
870 s += 6;
871 while (isspace(*s)) s++;
872 if (big_buffer + len - s > sizeof(next_section) - 2)
873 s[sizeof(next_section) - 2] = 0;
874 Ustrcpy(next_section, s);
875 return NULL;
876 }
877
878 /* Return the first non-blank character. */
879
880 return s;
881 }
882
883
884
885 /*************************************************
886 * Read a name *
887 *************************************************/
888
889 /* The yield is the pointer to the next uschar. Names longer than the
890 output space are silently truncated. This function is also used from acl.c when
891 parsing ACLs.
892
893 Arguments:
894 name where to put the name
895 len length of name
896 s input pointer
897
898 Returns: new input pointer
899 */
900
901 uschar *
902 readconf_readname(uschar *name, int len, uschar *s)
903 {
904 int p = 0;
905 while (isspace(*s)) s++;
906 if (isalpha(*s))
907 {
908 while (isalnum(*s) || *s == '_')
909 {
910 if (p < len-1) name[p++] = *s;
911 s++;
912 }
913 }
914 name[p] = 0;
915 while (isspace(*s)) s++;
916 return s;
917 }
918
919
920
921
922 /*************************************************
923 * Read a time value *
924 *************************************************/
925
926 /* This function is also called from outside, to read argument
927 time values. The format of a time value is:
928
929 [<n>w][<n>d][<n>h][<n>m][<n>s]
930
931 as long as at least one is present. If a format error is encountered,
932 return a negative value. The value must be terminated by the given
933 terminator.
934
935 Arguments:
936 s input pointer
937 terminator required terminating character
938 return_msec if TRUE, allow fractional seconds and return milliseconds
939
940 Returns: the time value, or -1 on syntax error
941 value is seconds if return_msec is FALSE
942 value is milliseconds if return_msec is TRUE
943 */
944
945 int
946 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
947 {
948 int yield = 0;
949 for (;;)
950 {
951 int value, count;
952 double fraction;
953
954 if (!isdigit(*s)) return -1;
955 (void)sscanf(CS s, "%d%n", &value, &count);
956 s += count;
957
958 switch (*s)
959 {
960 case 'w': value *= 7;
961 case 'd': value *= 24;
962 case 'h': value *= 60;
963 case 'm': value *= 60;
964 case 's': s++;
965 break;
966
967 case '.':
968 if (!return_msec) return -1;
969 (void)sscanf(CS s, "%lf%n", &fraction, &count);
970 s += count;
971 if (*s++ != 's') return -1;
972 yield += (int)(fraction * 1000.0);
973 break;
974
975 default: return -1;
976 }
977
978 if (return_msec) value *= 1000;
979 yield += value;
980 if (*s == terminator) return yield;
981 }
982 /* Control never reaches here. */
983 }
984
985
986
987 /*************************************************
988 * Read a fixed point value *
989 *************************************************/
990
991 /* The value is returned *1000
992
993 Arguments:
994 s input pointer
995 terminator required terminator
996
997 Returns: the value, or -1 on error
998 */
999
1000 static int
1001 readconf_readfixed(uschar *s, int terminator)
1002 {
1003 int yield = 0;
1004 int value, count;
1005 if (!isdigit(*s)) return -1;
1006 (void)sscanf(CS s, "%d%n", &value, &count);
1007 s += count;
1008 yield = value * 1000;
1009 if (*s == '.')
1010 {
1011 int m = 100;
1012 while (isdigit((*(++s))))
1013 {
1014 yield += (*s - '0') * m;
1015 m /= 10;
1016 }
1017 }
1018
1019 return (*s == terminator)? yield : (-1);
1020 }
1021
1022
1023
1024 /*************************************************
1025 * Find option in list *
1026 *************************************************/
1027
1028 /* The lists are always in order, so binary chop can be used.
1029
1030 Arguments:
1031 name the option name to search for
1032 ol the first entry in the option list
1033 last one more than the offset of the last entry in the option list
1034
1035 Returns: pointer to an option entry, or NULL if not found
1036 */
1037
1038 static optionlist *
1039 find_option(uschar *name, optionlist *ol, int last)
1040 {
1041 int first = 0;
1042 while (last > first)
1043 {
1044 int middle = (first + last)/2;
1045 int c = Ustrcmp(name, ol[middle].name);
1046 if (c == 0) return ol + middle;
1047 else if (c > 0) first = middle + 1;
1048 else last = middle;
1049 }
1050 return NULL;
1051 }
1052
1053
1054
1055 /*************************************************
1056 * Find a set flag in option list *
1057 *************************************************/
1058
1059 /* Because some versions of Unix make no restrictions on the values of uids and
1060 gids (even negative ones), we cannot represent "unset" by a special value.
1061 There is therefore a separate boolean variable for each one indicating whether
1062 a value is set or not. This function returns a pointer to the boolean, given
1063 the original option name. It is a major disaster if the flag cannot be found.
1064
1065 Arguments:
1066 name the name of the uid or gid option
1067 oltop points to the start of the relevant option list
1068 last one more than the offset of the last item in the option list
1069 data_block NULL when reading main options => data values in the option
1070 list are absolute addresses; otherwise they are byte offsets
1071 in data_block (used for driver options)
1072
1073 Returns: a pointer to the boolean flag.
1074 */
1075
1076 static BOOL *
1077 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1078 {
1079 optionlist *ol;
1080 uschar name2[64];
1081 sprintf(CS name2, "*set_%.50s", name);
1082 ol = find_option(name2, oltop, last);
1083 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1084 "Exim internal error: missing set flag for %s", name);
1085 return (data_block == NULL)? (BOOL *)(ol->value) :
1086 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1087 }
1088
1089
1090
1091
1092 /*************************************************
1093 * Output extra characters message and die *
1094 *************************************************/
1095
1096 /* Called when an option line has junk on the end. Sometimes this is because
1097 the sysadmin thinks comments are permitted.
1098
1099 Arguments:
1100 s points to the extra characters
1101 t1..t3 strings to insert in the log message
1102
1103 Returns: doesn't return; dies
1104 */
1105
1106 static void
1107 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1108 {
1109 uschar *comment = US"";
1110 if (*s == '#') comment = US" (# is comment only at line start)";
1111 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1112 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1113 }
1114
1115
1116
1117 /*************************************************
1118 * Read rewrite information *
1119 *************************************************/
1120
1121 /* Each line of rewrite information contains:
1122
1123 . A complete address in the form user@domain, possibly with
1124 leading * for each part; or alternatively, a regex.
1125
1126 . A replacement string (which will be expanded).
1127
1128 . An optional sequence of one-letter flags, indicating which
1129 headers etc. to apply this rule to.
1130
1131 All this is decoded and placed into a control block. The OR of the flags is
1132 maintained in a common word.
1133
1134 Arguments:
1135 p points to the string that makes up the rule
1136 existflags points to the overall flag word
1137 isglobal TRUE if reading global rewrite rules
1138
1139 Returns: the control block for the parsed rule.
1140 */
1141
1142 static rewrite_rule *
1143 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1144 {
1145 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1146
1147 next->next = NULL;
1148 next->key = string_dequote(&p);
1149
1150 while (isspace(*p)) p++;
1151 if (*p == 0)
1152 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1153 "missing rewrite replacement string");
1154
1155 next->flags = 0;
1156 next->replacement = string_dequote(&p);
1157
1158 while (*p != 0) switch (*p++)
1159 {
1160 case ' ': case '\t': break;
1161
1162 case 'q': next->flags |= rewrite_quit; break;
1163 case 'w': next->flags |= rewrite_whole; break;
1164
1165 case 'h': next->flags |= rewrite_all_headers; break;
1166 case 's': next->flags |= rewrite_sender; break;
1167 case 'f': next->flags |= rewrite_from; break;
1168 case 't': next->flags |= rewrite_to; break;
1169 case 'c': next->flags |= rewrite_cc; break;
1170 case 'b': next->flags |= rewrite_bcc; break;
1171 case 'r': next->flags |= rewrite_replyto; break;
1172
1173 case 'E': next->flags |= rewrite_all_envelope; break;
1174 case 'F': next->flags |= rewrite_envfrom; break;
1175 case 'T': next->flags |= rewrite_envto; break;
1176
1177 case 'Q': next->flags |= rewrite_qualify; break;
1178 case 'R': next->flags |= rewrite_repeat; break;
1179
1180 case 'S':
1181 next->flags |= rewrite_smtp;
1182 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1183 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1184 "rewrite rule has the S flag but is not a regular expression");
1185 break;
1186
1187 default:
1188 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1189 "unknown rewrite flag character '%c' "
1190 "(could be missing quotes round replacement item)", p[-1]);
1191 break;
1192 }
1193
1194 /* If no action flags are set, set all the "normal" rewrites. */
1195
1196 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1197 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1198
1199 /* Remember which exist, for optimization, and return the rule */
1200
1201 *existflags |= next->flags;
1202 return next;
1203 }
1204
1205
1206
1207
1208 /*************************************************
1209 * Read global rewrite information *
1210 *************************************************/
1211
1212 /* Each line is a single rewrite rule; it is parsed into a control block
1213 by readconf_one_rewrite(), and its flags are ORed into the global flag
1214 word rewrite_existflags. */
1215
1216 void
1217 readconf_rewrites(void)
1218 {
1219 rewrite_rule **chain = &global_rewrite_rules;
1220 uschar *p;
1221
1222 while ((p = get_config_line()) != NULL)
1223 {
1224 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1225 *chain = next;
1226 chain = &(next->next);
1227 }
1228 }
1229
1230
1231
1232 /*************************************************
1233 * Read a string *
1234 *************************************************/
1235
1236 /* Strings are read into the normal store pool. As long we aren't too
1237 near the end of the current block, the string will just use what is necessary
1238 on the top of the stacking pool, because string_cat() uses the extension
1239 mechanism.
1240
1241 Argument:
1242 s the rest of the input line
1243 name the option name (for errors)
1244
1245 Returns: pointer to the string
1246 */
1247
1248 static uschar *
1249 read_string(uschar *s, uschar *name)
1250 {
1251 uschar *yield;
1252 uschar *ss;
1253
1254 if (*s != '\"') return string_copy(s);
1255
1256 ss = s;
1257 yield = string_dequote(&s);
1258
1259 if (s == ss+1 || s[-1] != '\"')
1260 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1261 "missing quote at end of string value for %s", name);
1262
1263 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1264
1265 return yield;
1266 }
1267
1268
1269 /*************************************************
1270 * Handle option line *
1271 *************************************************/
1272
1273 /* This function is called from several places to process a line containing the
1274 setting of an option. The first argument is the line to be decoded; it has been
1275 checked not to be empty and not to start with '#'. Trailing newlines and white
1276 space have been removed. The second argument is a pointer to the list of
1277 variable names that are to be recognized, together with their types and
1278 locations, and the third argument gives the number of entries in the list.
1279
1280 The fourth argument is a pointer to a data block. If it is NULL, then the data
1281 values in the options list are absolute addresses. Otherwise, they are byte
1282 offsets in the data block.
1283
1284 String option data may continue onto several lines; this function reads further
1285 data from config_file if necessary.
1286
1287 The yield of this function is normally zero. If a string continues onto
1288 multiple lines, then the data value is permitted to be followed by a comma
1289 or a semicolon (for use in drivers) and the yield is that character.
1290
1291 Arguments:
1292 buffer contains the configuration line to be handled
1293 oltop points to the start of the relevant option list
1294 last one more than the offset of the last item in the option list
1295 data_block NULL when reading main options => data values in the option
1296 list are absolute addresses; otherwise they are byte offsets
1297 in data_block when they have opt_public set; otherwise
1298 they are byte offsets in data_block->options_block.
1299 unknown_txt format string to use in panic message for unknown option;
1300 must contain %s for option name
1301 if given as NULL, don't panic on unknown option
1302
1303 Returns: TRUE if an option was read successfully,
1304 FALSE false for an unknown option if unknown_txt == NULL,
1305 otherwise panic and die on an unknown option
1306 */
1307
1308 static BOOL
1309 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1310 void *data_block, uschar *unknown_txt)
1311 {
1312 int ptr = 0;
1313 int offset = 0;
1314 int n, count, type, value;
1315 int issecure = 0;
1316 uid_t uid;
1317 gid_t gid;
1318 BOOL boolvalue = TRUE;
1319 BOOL freesptr = TRUE;
1320 optionlist *ol, *ol2;
1321 struct passwd *pw;
1322 void *reset_point;
1323 int intbase = 0;
1324 uschar *inttype = US"";
1325 uschar *sptr;
1326 uschar *s = buffer;
1327 uschar name[64];
1328 uschar name2[64];
1329
1330 /* There may be leading spaces; thereafter, we expect an option name starting
1331 with a letter. */
1332
1333 while (isspace(*s)) s++;
1334 if (!isalpha(*s))
1335 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1336
1337 /* Read the name of the option, and skip any subsequent white space. If
1338 it turns out that what we read was "hide", set the flag indicating that
1339 this is a secure option, and loop to read the next word. */
1340
1341 for (n = 0; n < 2; n++)
1342 {
1343 while (isalnum(*s) || *s == '_')
1344 {
1345 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1346 s++;
1347 }
1348 name[ptr] = 0;
1349 while (isspace(*s)) s++;
1350 if (Ustrcmp(name, "hide") != 0) break;
1351 issecure = opt_secure;
1352 ptr = 0;
1353 }
1354
1355 /* Deal with "no_" or "not_" here for booleans */
1356
1357 if (Ustrncmp(name, "no_", 3) == 0)
1358 {
1359 boolvalue = FALSE;
1360 offset = 3;
1361 }
1362
1363 if (Ustrncmp(name, "not_", 4) == 0)
1364 {
1365 boolvalue = FALSE;
1366 offset = 4;
1367 }
1368
1369 /* Search the list for the given name. A non-existent name, or an option that
1370 is set twice, is a disaster. */
1371
1372 ol = find_option(name + offset, oltop, last);
1373
1374 if (ol == NULL)
1375 {
1376 if (unknown_txt == NULL) return FALSE;
1377 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1378 }
1379
1380 if ((ol->type & opt_set) != 0)
1381 {
1382 uschar *mname = name;
1383 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1384 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1385 "\"%s\" option set for the second time", mname);
1386 }
1387
1388 ol->type |= opt_set | issecure;
1389 type = ol->type & opt_mask;
1390
1391 /* Types with data values must be followed by '='; the "no[t]_" prefix
1392 applies only to boolean values. */
1393
1394 if (type < opt_bool || type > opt_bool_last)
1395 {
1396 if (offset != 0)
1397 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1398 "negation prefix applied to a non-boolean option");
1399 if (*s == 0)
1400 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1401 "unexpected end of line (data missing) after %s", name);
1402 if (*s != '=')
1403 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1404 }
1405
1406 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1407 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1408 ultimately expands to one of those values. */
1409
1410 else if (*s != 0 && (offset != 0 || *s != '='))
1411 extra_chars_error(s, US"boolean option ", name, US"");
1412
1413 /* Skip white space after = */
1414
1415 if (*s == '=') while (isspace((*(++s))));
1416
1417 /* If there is a data block and the opt_public flag is not set, change
1418 the data block pointer to the private options block. */
1419
1420 if (data_block != NULL && (ol->type & opt_public) == 0)
1421 data_block = (void *)(((driver_instance *)data_block)->options_block);
1422
1423 /* Now get the data according to the type. */
1424
1425 switch (type)
1426 {
1427 /* If a string value is not enclosed in quotes, it consists of
1428 the rest of the current line, verbatim. Otherwise, string escapes
1429 are processed.
1430
1431 A transport is specified as a string, which is then looked up in the
1432 list of transports. A search type is specified as one of a number of
1433 known strings.
1434
1435 A set or rewrite rules for a driver is specified as a string, which is
1436 then parsed into a suitable chain of control blocks.
1437
1438 Uids and gids are specified as strings which are then looked up in the
1439 passwd file. Lists of uids and gids are similarly specified as colon-
1440 separated strings. */
1441
1442 case opt_stringptr:
1443 case opt_uid:
1444 case opt_gid:
1445 case opt_expand_uid:
1446 case opt_expand_gid:
1447 case opt_uidlist:
1448 case opt_gidlist:
1449 case opt_rewrite:
1450
1451 reset_point = sptr = read_string(s, name);
1452
1453 /* Having read a string, we now have several different ways of using it,
1454 depending on the data type, so do another switch. If keeping the actual
1455 string is not required (because it is interpreted), freesptr is set TRUE,
1456 and at the end we reset the pool. */
1457
1458 switch (type)
1459 {
1460 /* If this was a string, set the variable to point to the new string,
1461 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1462 rules, we still keep the string (for printing), and parse the rules into a
1463 control block and flags word. */
1464
1465 case opt_stringptr:
1466 case opt_rewrite:
1467 if (data_block == NULL)
1468 *((uschar **)(ol->value)) = sptr;
1469 else
1470 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1471 freesptr = FALSE;
1472 if (type == opt_rewrite)
1473 {
1474 int sep = 0;
1475 int *flagptr;
1476 uschar *p = sptr;
1477 rewrite_rule **chain;
1478 optionlist *ol3;
1479
1480 sprintf(CS name2, "*%.50s_rules", name);
1481 ol2 = find_option(name2, oltop, last);
1482 sprintf(CS name2, "*%.50s_flags", name);
1483 ol3 = find_option(name2, oltop, last);
1484
1485 if (ol2 == NULL || ol3 == NULL)
1486 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1487 "rewrite rules not available for driver");
1488
1489 if (data_block == NULL)
1490 {
1491 chain = (rewrite_rule **)(ol2->value);
1492 flagptr = (int *)(ol3->value);
1493 }
1494 else
1495 {
1496 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1497 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1498 }
1499
1500 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1501 != NULL)
1502 {
1503 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1504 *chain = next;
1505 chain = &(next->next);
1506 }
1507
1508 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1509 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1510 "non-header rewrite - not allowed at transport time -");
1511 }
1512 break;
1513
1514 /* If it was an expanded uid, see if there is any expansion to be
1515 done by checking for the presence of a $ character. If there is, save it
1516 in the corresponding *expand_user option field. Otherwise, fall through
1517 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1518 of data. */
1519
1520 case opt_expand_uid:
1521 sprintf(CS name2, "*expand_%.50s", name);
1522 ol2 = find_option(name2, oltop, last);
1523 if (ol2 != NULL)
1524 {
1525 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1526
1527 if (data_block == NULL)
1528 *((uschar **)(ol2->value)) = ss;
1529 else
1530 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1531
1532 if (ss != NULL)
1533 {
1534 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1535 freesptr = FALSE;
1536 break;
1537 }
1538 }
1539
1540 /* Look up a fixed uid, and also make use of the corresponding gid
1541 if a passwd entry is returned and the gid has not been set. */
1542
1543 case opt_uid:
1544 if (!route_finduser(sptr, &pw, &uid))
1545 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1546 if (data_block == NULL)
1547 *((uid_t *)(ol->value)) = uid;
1548 else
1549 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1550
1551 /* Set the flag indicating a fixed value is set */
1552
1553 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1554
1555 /* Handle matching gid if we have a passwd entry: done by finding the
1556 same name with terminating "user" changed to "group"; if not found,
1557 ignore. Also ignore if the value is already set. */
1558
1559 if (pw == NULL) break;
1560 Ustrcpy(name+Ustrlen(name)-4, "group");
1561 ol2 = find_option(name, oltop, last);
1562 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1563 (ol2->type & opt_mask) == opt_expand_gid))
1564 {
1565 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1566 if (! *set_flag)
1567 {
1568 if (data_block == NULL)
1569 *((gid_t *)(ol2->value)) = pw->pw_gid;
1570 else
1571 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1572 *set_flag = TRUE;
1573 }
1574 }
1575 break;
1576
1577 /* If it was an expanded gid, see if there is any expansion to be
1578 done by checking for the presence of a $ character. If there is, save it
1579 in the corresponding *expand_user option field. Otherwise, fall through
1580 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1581 of data. */
1582
1583 case opt_expand_gid:
1584 sprintf(CS name2, "*expand_%.50s", name);
1585 ol2 = find_option(name2, oltop, last);
1586 if (ol2 != NULL)
1587 {
1588 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1589
1590 if (data_block == NULL)
1591 *((uschar **)(ol2->value)) = ss;
1592 else
1593 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1594
1595 if (ss != NULL)
1596 {
1597 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1598 freesptr = FALSE;
1599 break;
1600 }
1601 }
1602
1603 /* Handle freestanding gid */
1604
1605 case opt_gid:
1606 if (!route_findgroup(sptr, &gid))
1607 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1608 if (data_block == NULL)
1609 *((gid_t *)(ol->value)) = gid;
1610 else
1611 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1612 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1613 break;
1614
1615 /* If it was a uid list, look up each individual entry, and build
1616 a vector of uids, with a count in the first element. Put the vector
1617 in malloc store so we can free the string. (We are reading into
1618 permanent store already.) */
1619
1620 case opt_uidlist:
1621 {
1622 int count = 1;
1623 uid_t *list;
1624 int ptr = 0;
1625 uschar *p = sptr;
1626
1627 if (*p != 0) count++;
1628 while (*p != 0) if (*p++ == ':') count++;
1629 list = store_malloc(count*sizeof(uid_t));
1630 list[ptr++] = (uid_t)(count - 1);
1631
1632 if (data_block == NULL)
1633 *((uid_t **)(ol->value)) = list;
1634 else
1635 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1636
1637 p = sptr;
1638 while (count-- > 1)
1639 {
1640 int sep = 0;
1641 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1642 if (!route_finduser(big_buffer, NULL, &uid))
1643 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1644 big_buffer);
1645 list[ptr++] = uid;
1646 }
1647 }
1648 break;
1649
1650 /* If it was a gid list, look up each individual entry, and build
1651 a vector of gids, with a count in the first element. Put the vector
1652 in malloc store so we can free the string. (We are reading into permanent
1653 store already.) */
1654
1655 case opt_gidlist:
1656 {
1657 int count = 1;
1658 gid_t *list;
1659 int ptr = 0;
1660 uschar *p = sptr;
1661
1662 if (*p != 0) count++;
1663 while (*p != 0) if (*p++ == ':') count++;
1664 list = store_malloc(count*sizeof(gid_t));
1665 list[ptr++] = (gid_t)(count - 1);
1666
1667 if (data_block == NULL)
1668 *((gid_t **)(ol->value)) = list;
1669 else
1670 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1671
1672 p = sptr;
1673 while (count-- > 1)
1674 {
1675 int sep = 0;
1676 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1677 if (!route_findgroup(big_buffer, &gid))
1678 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1679 big_buffer);
1680 list[ptr++] = gid;
1681 }
1682 }
1683 break;
1684 }
1685
1686 /* Release store if the value of the string doesn't need to be kept. */
1687
1688 if (freesptr) store_reset(reset_point);
1689 break;
1690
1691 /* Expanded boolean: if no characters follow, or if there are no dollar
1692 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1693 save the string for later expansion in the alternate place. */
1694
1695 case opt_expand_bool:
1696 if (*s != 0 && Ustrchr(s, '$') != 0)
1697 {
1698 sprintf(CS name2, "*expand_%.50s", name);
1699 ol2 = find_option(name2, oltop, last);
1700 if (ol2 != NULL)
1701 {
1702 reset_point = sptr = read_string(s, name);
1703 if (data_block == NULL)
1704 *((uschar **)(ol2->value)) = sptr;
1705 else
1706 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1707 freesptr = FALSE;
1708 break;
1709 }
1710 }
1711 /* Fall through */
1712
1713 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1714 look for yes/not/true/false. Some booleans are stored in a single bit in
1715 a single int. There's a special fudge for verify settings; without a suffix
1716 they set both xx_sender and xx_recipient. The table points to the sender
1717 value; search subsequently for the recipient. There's another special case:
1718 opt_bool_set also notes when a boolean has been set. */
1719
1720 case opt_bool:
1721 case opt_bit:
1722 case opt_bool_verify:
1723 case opt_bool_set:
1724 if (*s != 0)
1725 {
1726 s = readconf_readname(name2, 64, s);
1727 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1728 boolvalue = TRUE;
1729 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1730 boolvalue = FALSE;
1731 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1732 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1733 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1734 US"for boolean option ", name);
1735 }
1736
1737 /* Handle single-bit type. */
1738
1739 if (type == opt_bit)
1740 {
1741 int bit = 1 << ((ol->type >> 16) & 31);
1742 int *ptr = (data_block == NULL)?
1743 (int *)(ol->value) :
1744 (int *)((uschar *)data_block + (long int)ol->value);
1745 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1746 break;
1747 }
1748
1749 /* Handle full BOOL types */
1750
1751 if (data_block == NULL)
1752 *((BOOL *)(ol->value)) = boolvalue;
1753 else
1754 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1755
1756 /* Verify fudge */
1757
1758 if (type == opt_bool_verify)
1759 {
1760 sprintf(CS name2, "%.50s_recipient", name + offset);
1761 ol2 = find_option(name2, oltop, last);
1762 if (ol2 != NULL)
1763 {
1764 if (data_block == NULL)
1765 *((BOOL *)(ol2->value)) = boolvalue;
1766 else
1767 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1768 }
1769 }
1770
1771 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1772
1773 else if (type == opt_bool_set)
1774 {
1775 sprintf(CS name2, "*set_%.50s", name + offset);
1776 ol2 = find_option(name2, oltop, last);
1777 if (ol2 != NULL)
1778 {
1779 if (data_block == NULL)
1780 *((BOOL *)(ol2->value)) = TRUE;
1781 else
1782 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1783 }
1784 }
1785 break;
1786
1787 /* Octal integer */
1788
1789 case opt_octint:
1790 intbase = 8;
1791 inttype = US"octal ";
1792
1793 /* Integer: a simple(ish) case; allow octal and hex formats, and
1794 suffixes K and M. The different types affect output, not input. */
1795
1796 case opt_mkint:
1797 case opt_int:
1798 {
1799 uschar *endptr;
1800 errno = 0;
1801 value = strtol(CS s, CSS &endptr, intbase);
1802
1803 if (endptr == s)
1804 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1805 inttype, name);
1806
1807 if (errno != ERANGE)
1808 {
1809 if (tolower(*endptr) == 'k')
1810 {
1811 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1812 else value *= 1024;
1813 endptr++;
1814 }
1815 else if (tolower(*endptr) == 'm')
1816 {
1817 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1818 errno = ERANGE;
1819 else value *= 1024*1024;
1820 endptr++;
1821 }
1822 }
1823
1824 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1825 "absolute value of integer \"%s\" is too large (overflow)", s);
1826
1827 while (isspace(*endptr)) endptr++;
1828 if (*endptr != 0)
1829 extra_chars_error(endptr, inttype, US"integer value for ", name);
1830 }
1831
1832 if (data_block == NULL)
1833 *((int *)(ol->value)) = value;
1834 else
1835 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1836 break;
1837
1838 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1839 M. */
1840
1841 case opt_Kint:
1842 {
1843 uschar *endptr;
1844 errno = 0;
1845 value = strtol(CS s, CSS &endptr, intbase);
1846
1847 if (endptr == s)
1848 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1849 inttype, name);
1850
1851 if (errno != ERANGE)
1852 {
1853 if (tolower(*endptr) == 'm')
1854 {
1855 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1856 else value *= 1024;
1857 endptr++;
1858 }
1859 else if (tolower(*endptr) == 'k')
1860 {
1861 endptr++;
1862 }
1863 else
1864 {
1865 value = (value + 512)/1024;
1866 }
1867 }
1868
1869 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1870 "absolute value of integer \"%s\" is too large (overflow)", s);
1871
1872 while (isspace(*endptr)) endptr++;
1873 if (*endptr != 0)
1874 extra_chars_error(endptr, inttype, US"integer value for ", name);
1875 }
1876
1877 if (data_block == NULL)
1878 *((int *)(ol->value)) = value;
1879 else
1880 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1881 break;
1882
1883 /* Fixed-point number: held to 3 decimal places. */
1884
1885 case opt_fixed:
1886 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1887 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1888 "fixed-point number expected for %s", name);
1889
1890 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1891 "integer \"%s\" is too large (overflow)", s);
1892
1893 value *= 1000;
1894
1895 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1896 "integer \"%s\" is too large (overflow)", s);
1897
1898 if (s[count] == '.')
1899 {
1900 int d = 100;
1901 while (isdigit(s[++count]))
1902 {
1903 value += (s[count] - '0') * d;
1904 d /= 10;
1905 }
1906 }
1907
1908 while (isspace(s[count])) count++;
1909
1910 if (s[count] != 0)
1911 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1912
1913 if (data_block == NULL)
1914 *((int *)(ol->value)) = value;
1915 else
1916 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1917 break;
1918
1919 /* There's a special routine to read time values. */
1920
1921 case opt_time:
1922 value = readconf_readtime(s, 0, FALSE);
1923 if (value < 0)
1924 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1925 name);
1926 if (data_block == NULL)
1927 *((int *)(ol->value)) = value;
1928 else
1929 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1930 break;
1931
1932 /* A time list is a list of colon-separated times, with the first
1933 element holding the size of the list and the second the number of
1934 entries used. */
1935
1936 case opt_timelist:
1937 {
1938 int count = 0;
1939 int *list = (data_block == NULL)?
1940 (int *)(ol->value) :
1941 (int *)((uschar *)data_block + (long int)(ol->value));
1942
1943 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1944 {
1945 int terminator = 0;
1946 uschar *snext = Ustrchr(s, ':');
1947 if (snext != NULL)
1948 {
1949 uschar *ss = snext;
1950 while (ss > s && isspace(ss[-1])) ss--;
1951 terminator = *ss;
1952 }
1953 value = readconf_readtime(s, terminator, FALSE);
1954 if (value < 0)
1955 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1956 name);
1957 if (count > 1 && value <= list[count])
1958 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1959 "time value out of order for %s", name);
1960 list[count+1] = value;
1961 if (snext == NULL) break;
1962 s = snext + 1;
1963 while (isspace(*s)) s++;
1964 }
1965
1966 if (count > list[0] - 2)
1967 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1968 name);
1969 if (count > 0 && list[2] == 0) count = 0;
1970 list[1] = count;
1971 }
1972
1973 break;
1974 }
1975
1976 return TRUE;
1977 }
1978
1979
1980
1981 /*************************************************
1982 * Print a time value *
1983 *************************************************/
1984
1985 /*
1986 Argument: a time value in seconds
1987 Returns: pointer to a fixed buffer containing the time as a string,
1988 in readconf_readtime() format
1989 */
1990
1991 uschar *
1992 readconf_printtime(int t)
1993 {
1994 int s, m, h, d, w;
1995 uschar *p = time_buffer;
1996
1997 s = t % 60;
1998 t /= 60;
1999 m = t % 60;
2000 t /= 60;
2001 h = t % 24;
2002 t /= 24;
2003 d = t % 7;
2004 w = t/7;
2005
2006 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2007 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2008 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2009 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2010 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2011
2012 return time_buffer;
2013 }
2014
2015
2016
2017 /*************************************************
2018 * Print an individual option value *
2019 *************************************************/
2020
2021 /* This is used by the -bP option, so prints to the standard output.
2022 The entire options list is passed in as an argument, because some options come
2023 in pairs - typically uid/gid settings, which can either be explicit numerical
2024 values, or strings to be expanded later. If the numerical value is unset,
2025 search for "*expand_<name>" to see if there is a string equivalent.
2026
2027 Arguments:
2028 ol option entry, or NULL for an unknown option
2029 name option name
2030 options_block NULL for main configuration options; otherwise points to
2031 a driver block; if the option doesn't have opt_public
2032 set, then options_block->options_block is where the item
2033 resides.
2034 oltop points to the option list in which ol exists
2035 last one more than the offset of the last entry in optop
2036
2037 Returns: nothing
2038 */
2039
2040 static void
2041 print_ol(optionlist *ol, uschar *name, void *options_block,
2042 optionlist *oltop, int last)
2043 {
2044 struct passwd *pw;
2045 struct group *gr;
2046 optionlist *ol2;
2047 void *value;
2048 uid_t *uidlist;
2049 gid_t *gidlist;
2050 uschar *s;
2051 uschar name2[64];
2052
2053 if (ol == NULL)
2054 {
2055 printf("%s is not a known option\n", name);
2056 return;
2057 }
2058
2059 /* Non-admin callers cannot see options that have been flagged secure by the
2060 "hide" prefix. */
2061
2062 if (!admin_user && (ol->type & opt_secure) != 0)
2063 {
2064 printf("%s = <value not displayable>\n", name);
2065 return;
2066 }
2067
2068 /* Else show the value of the option */
2069
2070 value = ol->value;
2071 if (options_block != NULL)
2072 {
2073 if ((ol->type & opt_public) == 0)
2074 options_block = (void *)(((driver_instance *)options_block)->options_block);
2075 value = (void *)((uschar *)options_block + (long int)value);
2076 }
2077
2078 switch(ol->type & opt_mask)
2079 {
2080 case opt_stringptr:
2081 case opt_rewrite: /* Show the text value */
2082 s = *((uschar **)value);
2083 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2084 break;
2085
2086 case opt_int:
2087 printf("%s = %d\n", name, *((int *)value));
2088 break;
2089
2090 case opt_mkint:
2091 {
2092 int x = *((int *)value);
2093 if (x != 0 && (x & 1023) == 0)
2094 {
2095 int c = 'K';
2096 x >>= 10;
2097 if ((x & 1023) == 0)
2098 {
2099 c = 'M';
2100 x >>= 10;
2101 }
2102 printf("%s = %d%c\n", name, x, c);
2103 }
2104 else printf("%s = %d\n", name, x);
2105 }
2106 break;
2107
2108 case opt_Kint:
2109 {
2110 int x = *((int *)value);
2111 if (x == 0) printf("%s = 0\n", name);
2112 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2113 else printf("%s = %dK\n", name, x);
2114 }
2115 break;
2116
2117 case opt_octint:
2118 printf("%s = %#o\n", name, *((int *)value));
2119 break;
2120
2121 /* Can be negative only when "unset", in which case integer */
2122
2123 case opt_fixed:
2124 {
2125 int x = *((int *)value);
2126 int f = x % 1000;
2127 int d = 100;
2128 if (x < 0) printf("%s =\n", name); else
2129 {
2130 printf("%s = %d.", name, x/1000);
2131 do
2132 {
2133 printf("%d", f/d);
2134 f %= d;
2135 d /= 10;
2136 }
2137 while (f != 0);
2138 printf("\n");
2139 }
2140 }
2141 break;
2142
2143 /* If the numerical value is unset, try for the string value */
2144
2145 case opt_expand_uid:
2146 if (! *get_set_flag(name, oltop, last, options_block))
2147 {
2148 sprintf(CS name2, "*expand_%.50s", name);
2149 ol2 = find_option(name2, oltop, last);
2150 if (ol2 != NULL)
2151 {
2152 void *value2 = ol2->value;
2153 if (options_block != NULL)
2154 value2 = (void *)((uschar *)options_block + (long int)value2);
2155 s = *((uschar **)value2);
2156 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2157 break;
2158 }
2159 }
2160
2161 /* Else fall through */
2162
2163 case opt_uid:
2164 if (! *get_set_flag(name, oltop, last, options_block))
2165 printf("%s =\n", name);
2166 else
2167 {
2168 pw = getpwuid(*((uid_t *)value));
2169 if (pw == NULL)
2170 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2171 else printf("%s = %s\n", name, pw->pw_name);
2172 }
2173 break;
2174
2175 /* If the numerical value is unset, try for the string value */
2176
2177 case opt_expand_gid:
2178 if (! *get_set_flag(name, oltop, last, options_block))
2179 {
2180 sprintf(CS name2, "*expand_%.50s", name);
2181 ol2 = find_option(name2, oltop, last);
2182 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2183 {
2184 void *value2 = ol2->value;
2185 if (options_block != NULL)
2186 value2 = (void *)((uschar *)options_block + (long int)value2);
2187 s = *((uschar **)value2);
2188 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2189 break;
2190 }
2191 }
2192
2193 /* Else fall through */
2194
2195 case opt_gid:
2196 if (! *get_set_flag(name, oltop, last, options_block))
2197 printf("%s =\n", name);
2198 else
2199 {
2200 gr = getgrgid(*((int *)value));
2201 if (gr == NULL)
2202 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2203 else printf("%s = %s\n", name, gr->gr_name);
2204 }
2205 break;
2206
2207 case opt_uidlist:
2208 uidlist = *((uid_t **)value);
2209 printf("%s =", name);
2210 if (uidlist != NULL)
2211 {
2212 int i;
2213 uschar sep = ' ';
2214 for (i = 1; i <= (int)(uidlist[0]); i++)
2215 {
2216 uschar *name = NULL;
2217 pw = getpwuid(uidlist[i]);
2218 if (pw != NULL) name = US pw->pw_name;
2219 if (name != NULL) printf("%c%s", sep, name);
2220 else printf("%c%ld", sep, (long int)(uidlist[i]));
2221 sep = ':';
2222 }
2223 }
2224 printf("\n");
2225 break;
2226
2227 case opt_gidlist:
2228 gidlist = *((gid_t **)value);
2229 printf("%s =", name);
2230 if (gidlist != NULL)
2231 {
2232 int i;
2233 uschar sep = ' ';
2234 for (i = 1; i <= (int)(gidlist[0]); i++)
2235 {
2236 uschar *name = NULL;
2237 gr = getgrgid(gidlist[i]);
2238 if (gr != NULL) name = US gr->gr_name;
2239 if (name != NULL) printf("%c%s", sep, name);
2240 else printf("%c%ld", sep, (long int)(gidlist[i]));
2241 sep = ':';
2242 }
2243 }
2244 printf("\n");
2245 break;
2246
2247 case opt_time:
2248 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2249 break;
2250
2251 case opt_timelist:
2252 {
2253 int i;
2254 int *list = (int *)value;
2255 printf("%s = ", name);
2256 for (i = 0; i < list[1]; i++)
2257 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2258 printf("\n");
2259 }
2260 break;
2261
2262 case opt_bit:
2263 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2264 "" : "no_", name);
2265 break;
2266
2267 case opt_expand_bool:
2268 sprintf(CS name2, "*expand_%.50s", name);
2269 ol2 = find_option(name2, oltop, last);
2270 if (ol2 != NULL && ol2->value != NULL)
2271 {
2272 void *value2 = ol2->value;
2273 if (options_block != NULL)
2274 value2 = (void *)((uschar *)options_block + (long int)value2);
2275 s = *((uschar **)value2);
2276 if (s != NULL)
2277 {
2278 printf("%s = %s\n", name, string_printing(s));
2279 break;
2280 }
2281 /* s == NULL => string not set; fall through */
2282 }
2283
2284 /* Fall through */
2285
2286 case opt_bool:
2287 case opt_bool_verify:
2288 case opt_bool_set:
2289 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2290 break;
2291 }
2292 }
2293
2294
2295
2296 /*************************************************
2297 * Print value from main configuration *
2298 *************************************************/
2299
2300 /* This function, called as a result of encountering the -bP option,
2301 causes the value of any main configuration variable to be output if the
2302 second argument is NULL. There are some special values:
2303
2304 all print all main configuration options
2305 configure_file print the name of the configuration file
2306 routers print the routers' configurations
2307 transports print the transports' configuration
2308 authenticators print the authenticators' configuration
2309 router_list print a list of router names
2310 transport_list print a list of transport names
2311 authenticator_list print a list of authentication mechanism names
2312 +name print a named list item
2313 local_scan print the local_scan options
2314
2315 If the second argument is not NULL, it must be one of "router", "transport", or
2316 "authenticator" in which case the first argument identifies the driver whose
2317 options are to be printed.
2318
2319 Arguments:
2320 name option name if type == NULL; else driver name
2321 type NULL or driver type name, as described above
2322
2323 Returns: nothing
2324 */
2325
2326 void
2327 readconf_print(uschar *name, uschar *type)
2328 {
2329 BOOL names_only = FALSE;
2330 optionlist *ol;
2331 optionlist *ol2 = NULL;
2332 driver_instance *d = NULL;
2333 int size = 0;
2334
2335 if (type == NULL)
2336 {
2337 if (*name == '+')
2338 {
2339 int i;
2340 tree_node *t;
2341 BOOL found = FALSE;
2342 static uschar *types[] = { US"address", US"domain", US"host",
2343 US"localpart" };
2344 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2345 &hostlist_anchor, &localpartlist_anchor };
2346
2347 for (i = 0; i < 4; i++)
2348 {
2349 t = tree_search(*(anchors[i]), name+1);
2350 if (t != NULL)
2351 {
2352 found = TRUE;
2353 printf("%slist %s = %s\n", types[i], name+1,
2354 ((namedlist_block *)(t->data.ptr))->string);
2355 }
2356 }
2357
2358 if (!found)
2359 printf("no address, domain, host, or local part list called \"%s\" "
2360 "exists\n", name+1);
2361
2362 return;
2363 }
2364
2365 if (Ustrcmp(name, "configure_file") == 0)
2366 {
2367 printf("%s\n", CS config_main_filename);
2368 return;
2369 }
2370
2371 if (Ustrcmp(name, "all") == 0)
2372 {
2373 for (ol = optionlist_config;
2374 ol < optionlist_config + optionlist_config_size; ol++)
2375 {
2376 if ((ol->type & opt_hidden) == 0)
2377 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2378 }
2379 return;
2380 }
2381
2382 if (Ustrcmp(name, "local_scan") == 0)
2383 {
2384 #ifndef LOCAL_SCAN_HAS_OPTIONS
2385 printf("local_scan() options are not supported\n");
2386 #else
2387 for (ol = local_scan_options;
2388 ol < local_scan_options + local_scan_options_count; ol++)
2389 {
2390 print_ol(ol, US ol->name, NULL, local_scan_options,
2391 local_scan_options_count);
2392 }
2393 #endif
2394 return;
2395 }
2396
2397 if (Ustrcmp(name, "routers") == 0)
2398 {
2399 type = US"router";
2400 name = NULL;
2401 }
2402 else if (Ustrcmp(name, "transports") == 0)
2403 {
2404 type = US"transport";
2405 name = NULL;
2406 }
2407
2408 else if (Ustrcmp(name, "authenticators") == 0)
2409 {
2410 type = US"authenticator";
2411 name = NULL;
2412 }
2413
2414 else if (Ustrcmp(name, "authenticator_list") == 0)
2415 {
2416 type = US"authenticator";
2417 name = NULL;
2418 names_only = TRUE;
2419 }
2420
2421 else if (Ustrcmp(name, "router_list") == 0)
2422 {
2423 type = US"router";
2424 name = NULL;
2425 names_only = TRUE;
2426 }
2427 else if (Ustrcmp(name, "transport_list") == 0)
2428 {
2429 type = US"transport";
2430 name = NULL;
2431 names_only = TRUE;
2432 }
2433 else
2434 {
2435 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2436 name, NULL, optionlist_config, optionlist_config_size);
2437 return;
2438 }
2439 }
2440
2441 /* Handle the options for a router or transport. Skip options that are flagged
2442 as hidden. Some of these are options with names starting with '*', used for
2443 internal alternative representations of other options (which the printing
2444 function will sort out). Others are synonyms kept for backward compatibility.
2445 */
2446
2447 if (Ustrcmp(type, "router") == 0)
2448 {
2449 d = (driver_instance *)routers;
2450 ol2 = optionlist_routers;
2451 size = optionlist_routers_size;
2452 }
2453 else if (Ustrcmp(type, "transport") == 0)
2454 {
2455 d = (driver_instance *)transports;
2456 ol2 = optionlist_transports;
2457 size = optionlist_transports_size;
2458 }
2459 else if (Ustrcmp(type, "authenticator") == 0)
2460 {
2461 d = (driver_instance *)auths;
2462 ol2 = optionlist_auths;
2463 size = optionlist_auths_size;
2464 }
2465
2466 if (names_only)
2467 {
2468 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2469 return;
2470 }
2471
2472 /* Either search for a given driver, or print all of them */
2473
2474 for (; d != NULL; d = d->next)
2475 {
2476 if (name == NULL)
2477 printf("\n%s %s:\n", d->name, type);
2478 else if (Ustrcmp(d->name, name) != 0) continue;
2479
2480 for (ol = ol2; ol < ol2 + size; ol++)
2481 {
2482 if ((ol->type & opt_hidden) == 0)
2483 print_ol(ol, US ol->name, d, ol2, size);
2484 }
2485
2486 for (ol = d->info->options;
2487 ol < d->info->options + *(d->info->options_count); ol++)
2488 {
2489 if ((ol->type & opt_hidden) == 0)
2490 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2491 }
2492 if (name != NULL) return;
2493 }
2494 if (name != NULL) printf("%s %s not found\n", type, name);
2495 }
2496
2497
2498
2499 /*************************************************
2500 * Read a named list item *
2501 *************************************************/
2502
2503 /* This function reads a name and a list (i.e. string). The name is used to
2504 save the list in a tree, sorted by its name. Each entry also has a number,
2505 which can be used for caching tests, but if the string contains any expansion
2506 items other than $key, the number is set negative to inhibit caching. This
2507 mechanism is used for domain, host, and address lists that are referenced by
2508 the "+name" syntax.
2509
2510 Arguments:
2511 anchorp points to the tree anchor
2512 numberp points to the current number for this tree
2513 max the maximum number permitted
2514 s the text of the option line, starting immediately after the name
2515 of the list type
2516 tname the name of the list type, for messages
2517
2518 Returns: nothing
2519 */
2520
2521 static void
2522 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2523 uschar *tname)
2524 {
2525 BOOL forcecache = FALSE;
2526 uschar *ss;
2527 tree_node *t;
2528 namedlist_block *nb = store_get(sizeof(namedlist_block));
2529
2530 if (Ustrncmp(s, "_cache", 6) == 0)
2531 {
2532 forcecache = TRUE;
2533 s += 6;
2534 }
2535
2536 if (!isspace(*s))
2537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2538
2539 if (*numberp >= max)
2540 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2541 tname, max);
2542
2543 while (isspace(*s)) s++;
2544 ss = s;
2545 while (isalnum(*s) || *s == '_') s++;
2546 t = store_get(sizeof(tree_node) + s-ss);
2547 Ustrncpy(t->name, ss, s-ss);
2548 t->name[s-ss] = 0;
2549 while (isspace(*s)) s++;
2550
2551 if (!tree_insertnode(anchorp, t))
2552 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2553 "duplicate name \"%s\" for a named %s", t->name, tname);
2554
2555 t->data.ptr = nb;
2556 nb->number = *numberp;
2557 *numberp += 1;
2558
2559 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2560 "missing '=' after \"%s\"", t->name);
2561 while (isspace(*s)) s++;
2562 nb->string = read_string(s, t->name);
2563 nb->cache_data = NULL;
2564
2565 /* Check the string for any expansions; if any are found, mark this list
2566 uncacheable unless the user has explicited forced caching. */
2567
2568 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2569 }
2570
2571
2572
2573
2574 /*************************************************
2575 * Unpick data for a rate limit *
2576 *************************************************/
2577
2578 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2579 separate values.
2580
2581 Arguments:
2582 s string, in the form t,b,f,l
2583 where t is the threshold (integer)
2584 b is the initial delay (time)
2585 f is the multiplicative factor (fixed point)
2586 k is the maximum time (time)
2587 threshold where to store threshold
2588 base where to store base in milliseconds
2589 factor where to store factor in milliseconds
2590 limit where to store limit
2591
2592 Returns: nothing (panics on error)
2593 */
2594
2595 static void
2596 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2597 int *limit)
2598 {
2599 uschar bstring[16], lstring[16];
2600
2601 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2602 factor, lstring) == 4)
2603 {
2604 *base = readconf_readtime(bstring, 0, TRUE);
2605 *limit = readconf_readtime(lstring, 0, TRUE);
2606 if (*base >= 0 && *limit >= 0) return;
2607 }
2608 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2609 }
2610
2611
2612
2613
2614 /*************************************************
2615 * Read main configuration options *
2616 *************************************************/
2617
2618 /* This function is the first to be called for configuration reading. It
2619 opens the configuration file and reads general configuration settings until
2620 it reaches the end of the configuration section. The file is then left open so
2621 that the remaining configuration data can subsequently be read if needed for
2622 this run of Exim.
2623
2624 The configuration file must be owned either by root or exim, and be writeable
2625 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2626 in the config file, so the test is done on the compiled in values. A slight
2627 anomaly, to be carefully documented.
2628
2629 The name of the configuration file is taken from a list that is included in the
2630 binary of Exim. It can be altered from the command line, but if that is done,
2631 root privilege is immediately withdrawn unless the caller is root or exim.
2632 The first file on the list that exists is used.
2633
2634 For use on multiple systems that share file systems, first look for a
2635 configuration file whose name has the current node name on the end. If that is
2636 not found, try the generic name. For really contorted configurations, that run
2637 multiple Exims with different uid settings, first try adding the effective uid
2638 before the node name. These complications are going to waste resources on most
2639 systems. Therefore they are available only when requested by compile-time
2640 options. */
2641
2642 void
2643 readconf_main(void)
2644 {
2645 int sep = 0;
2646 struct stat statbuf;
2647 uschar *s, *filename;
2648 uschar *list = config_main_filelist;
2649
2650 /* Loop through the possible file names */
2651
2652 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2653 != NULL)
2654 {
2655 /* Cut out all the fancy processing unless specifically wanted */
2656
2657 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2658 uschar *suffix = filename + Ustrlen(filename);
2659
2660 /* Try for the node-specific file if a node name exists */
2661
2662 #ifdef CONFIGURE_FILE_USE_NODE
2663 struct utsname uts;
2664 if (uname(&uts) >= 0)
2665 {
2666 #ifdef CONFIGURE_FILE_USE_EUID
2667 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2668 config_file = Ufopen(filename, "rb");
2669 if (config_file == NULL)
2670 #endif /* CONFIGURE_FILE_USE_EUID */
2671 {
2672 sprintf(CS suffix, ".%.256s", uts.nodename);
2673 config_file = Ufopen(filename, "rb");
2674 }
2675 }
2676 #endif /* CONFIGURE_FILE_USE_NODE */
2677
2678 /* Otherwise, try the generic name, possibly with the euid added */
2679
2680 #ifdef CONFIGURE_FILE_USE_EUID
2681 if (config_file == NULL)
2682 {
2683 sprintf(CS suffix, ".%ld", (long int)original_euid);
2684 config_file = Ufopen(filename, "rb");
2685 }
2686 #endif /* CONFIGURE_FILE_USE_EUID */
2687
2688 /* Finally, try the unadorned name */
2689
2690 if (config_file == NULL)
2691 {
2692 *suffix = 0;
2693 config_file = Ufopen(filename, "rb");
2694 }
2695 #else /* if neither defined */
2696
2697 /* This is the common case when the fancy processing is not included. */
2698
2699 config_file = Ufopen(filename, "rb");
2700 #endif
2701
2702 /* If the file does not exist, continue to try any others. For any other
2703 error, break out (and die). */
2704
2705 if (config_file != NULL || errno != ENOENT) break;
2706 }
2707
2708 /* On success, save the name for verification; config_filename is used when
2709 logging configuration errors (it changes for .included files) whereas
2710 config_main_filename is the name shown by -bP. Failure to open a configuration
2711 file is a serious disaster. */
2712
2713 if (config_file != NULL)
2714 {
2715 config_filename = config_main_filename = string_copy(filename);
2716 }
2717 else
2718 {
2719 if (filename == NULL)
2720 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2721 "%s", config_main_filelist);
2722 else
2723 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2724 "configuration file %s", filename));
2725 }
2726
2727 /* Check the status of the file we have opened, unless it was specified on
2728 the command line, in which case privilege was given away at the start. */
2729
2730 if (!config_changed)
2731 {
2732 if (fstat(fileno(config_file), &statbuf) != 0)
2733 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2734 big_buffer);
2735
2736 if ((statbuf.st_uid != root_uid && /* owner not root */
2737 statbuf.st_uid != exim_uid /* owner not exim */
2738 #ifdef CONFIGURE_OWNER
2739 && statbuf.st_uid != config_uid /* owner not the special one */
2740 #endif
2741 ) || /* or */
2742 (statbuf.st_gid != exim_gid /* group not exim & */
2743 #ifdef CONFIGURE_GROUP
2744 && statbuf.st_gid != config_gid /* group not the special one */
2745 #endif
2746 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2747 /* or */
2748 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2749
2750 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2751 "wrong owner, group, or mode", big_buffer);
2752 }
2753
2754 /* Process the main configuration settings. They all begin with a lower case
2755 letter. If we see something starting with an upper case letter, it is taken as
2756 a macro definition. */
2757
2758 while ((s = get_config_line()) != NULL)
2759 {
2760 if (isupper(s[0])) read_macro_assignment(s);
2761
2762 else if (Ustrncmp(s, "domainlist", 10) == 0)
2763 read_named_list(&domainlist_anchor, &domainlist_count,
2764 MAX_NAMED_LIST, s+10, US"domain list");
2765
2766 else if (Ustrncmp(s, "hostlist", 8) == 0)
2767 read_named_list(&hostlist_anchor, &hostlist_count,
2768 MAX_NAMED_LIST, s+8, US"host list");
2769
2770 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2771 read_named_list(&addresslist_anchor, &addresslist_count,
2772 MAX_NAMED_LIST, s+11, US"address list");
2773
2774 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2775 read_named_list(&localpartlist_anchor, &localpartlist_count,
2776 MAX_NAMED_LIST, s+13, US"local part list");
2777
2778 else
2779 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2780 NULL, US"main option \"%s\" unknown");
2781 }
2782
2783
2784 /* If local_sender_retain is set, local_from_check must be unset. */
2785
2786 if (local_sender_retain && local_from_check)
2787 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2788 "local_sender_retain are set; this combination is not allowed");
2789
2790 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2791 wanted. */
2792
2793 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2794
2795 /* remote_max_parallel must be > 0 */
2796
2797 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2798
2799 /* The primary host name may be required for expansion of spool_directory
2800 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2801 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2802 canonize it. Some people like upper case letters in their host names, so we
2803 don't force the case. */
2804
2805 if (primary_hostname == NULL)
2806 {
2807 uschar *hostname;
2808 struct utsname uts;
2809 if (uname(&uts) < 0)
2810 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2811 hostname = US uts.nodename;
2812
2813 if (Ustrchr(hostname, '.') == NULL)
2814 {
2815 int af = AF_INET;
2816 struct hostent *hostdata;
2817
2818 #if HAVE_IPV6
2819 if (dns_ipv4_lookup == NULL ||
2820 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2821 TRUE, NULL) != OK)
2822 af = AF_INET6;
2823 #else
2824 af = AF_INET;
2825 #endif
2826
2827 for (;;)
2828 {
2829 #if HAVE_IPV6
2830 #if HAVE_GETIPNODEBYNAME
2831 int error_num;
2832 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2833 #else
2834 hostdata = gethostbyname2(CS hostname, af);
2835 #endif
2836 #else
2837 hostdata = gethostbyname(CS hostname);
2838 #endif
2839
2840 if (hostdata != NULL)
2841 {
2842 hostname = US hostdata->h_name;
2843 break;
2844 }
2845
2846 if (af == AF_INET) break;
2847 af = AF_INET;
2848 }
2849 }
2850
2851 primary_hostname = string_copy(hostname);
2852 }
2853
2854 /* Set up default value for smtp_active_hostname */
2855
2856 smtp_active_hostname = primary_hostname;
2857
2858 /* If spool_directory wasn't set in the build-time configuration, it must have
2859 got set above. Of course, writing to the log may not work if log_file_path is
2860 not set, but it will at least get to syslog or somewhere, with any luck. */
2861
2862 if (*spool_directory == 0)
2863 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2864 "proceed");
2865
2866 /* Expand the spool directory name; it may, for example, contain the primary
2867 host name. Same comment about failure. */
2868
2869 s = expand_string(spool_directory);
2870 if (s == NULL)
2871 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2872 "\"%s\": %s", spool_directory, expand_string_message);
2873 spool_directory = s;
2874
2875 /* Expand log_file_path, which must contain "%s" in any component that isn't
2876 the null string or "syslog". It is also allowed to contain one instance of %D.
2877 However, it must NOT contain % followed by anything else. */
2878
2879 if (*log_file_path != 0)
2880 {
2881 uschar *ss, *sss;
2882 int sep = ':'; /* Fixed for log file path */
2883 s = expand_string(log_file_path);
2884 if (s == NULL)
2885 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2886 "\"%s\": %s", log_file_path, expand_string_message);
2887
2888 ss = s;
2889 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2890 {
2891 uschar *t;
2892 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2893 t = Ustrstr(sss, "%s");
2894 if (t == NULL)
2895 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2896 "contain \"%%s\"", sss);
2897 *t = 'X';
2898 t = Ustrchr(sss, '%');
2899 if (t != NULL)
2900 {
2901 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2902 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2903 "unexpected \"%%\" character", s);
2904 }
2905 }
2906
2907 log_file_path = s;
2908 }
2909
2910 /* Interpret syslog_facility into an integer argument for 'ident' param to
2911 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2912 leading "log_". */
2913
2914 if (syslog_facility_str != NULL)
2915 {
2916 int i;
2917 uschar *s = syslog_facility_str;
2918
2919 if ((Ustrlen(syslog_facility_str) >= 4) &&
2920 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2921 s += 4;
2922
2923 for (i = 0; i < syslog_list_size; i++)
2924 {
2925 if (strcmpic(s, syslog_list[i].name) == 0)
2926 {
2927 syslog_facility = syslog_list[i].value;
2928 break;
2929 }
2930 }
2931
2932 if (i >= syslog_list_size)
2933 {
2934 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2935 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2936 }
2937 }
2938
2939 /* Expand pid_file_path */
2940
2941 if (*pid_file_path != 0)
2942 {
2943 s = expand_string(pid_file_path);
2944 if (s == NULL)
2945 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2946 "\"%s\": %s", pid_file_path, expand_string_message);
2947 pid_file_path = s;
2948 }
2949
2950 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2951 message. */
2952
2953 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2954
2955 /* Unpick the SMTP rate limiting options, if set */
2956
2957 if (smtp_ratelimit_mail != NULL)
2958 {
2959 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2960 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2961 }
2962
2963 if (smtp_ratelimit_rcpt != NULL)
2964 {
2965 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
2966 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
2967 }
2968
2969 /* The qualify domains default to the primary host name */
2970
2971 if (qualify_domain_sender == NULL)
2972 qualify_domain_sender = primary_hostname;
2973 if (qualify_domain_recipient == NULL)
2974 qualify_domain_recipient = qualify_domain_sender;
2975
2976 /* Setting system_filter_user in the configuration sets the gid as well if a
2977 name is given, but a numerical value does not. */
2978
2979 if (system_filter_uid_set && !system_filter_gid_set)
2980 {
2981 struct passwd *pw = getpwuid(system_filter_uid);
2982 if (pw == NULL)
2983 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
2984 (long int)system_filter_uid);
2985 system_filter_gid = pw->pw_gid;
2986 system_filter_gid_set = TRUE;
2987 }
2988
2989 /* If the errors_reply_to field is set, check that it is syntactically valid
2990 and ensure it contains a domain. */
2991
2992 if (errors_reply_to != NULL)
2993 {
2994 uschar *errmess;
2995 int start, end, domain;
2996 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
2997 &start, &end, &domain, FALSE);
2998
2999 if (recipient == NULL)
3000 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3001 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3002
3003 if (domain == 0)
3004 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3005 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3006 }
3007
3008 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3009 smtp_accept_max must also be set. */
3010
3011 if (smtp_accept_max == 0 &&
3012 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3013 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3014 "smtp_accept_max must be set if smtp_accept_queue or "
3015 "smtp_accept_max_per_host is set");
3016
3017 /* Set up the host number if anything is specified. It is an expanded string
3018 so that it can be computed from the host name, for example. We do this last
3019 so as to ensure that everything else is set up before the expansion. */
3020
3021 if (host_number_string != NULL)
3022 {
3023 uschar *end;
3024 uschar *s = expand_string(host_number_string);
3025 long int n = Ustrtol(s, &end, 0);
3026 while (isspace(*end)) end++;
3027 if (*end != 0)
3028 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3029 "localhost_number value is not a number: %s", s);
3030 if (n > LOCALHOST_MAX)
3031 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3032 "localhost_number is greater than the maximum allowed value (%d)",
3033 LOCALHOST_MAX);
3034 host_number = n;
3035 }
3036
3037 #ifdef SUPPORT_TLS
3038 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3039
3040 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3041 tls_verify_certificates == NULL)
3042 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3043 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3044 (tls_verify_hosts != NULL)? "" : "try_");
3045 #endif
3046 }
3047
3048
3049
3050 /*************************************************
3051 * Initialize one driver *
3052 *************************************************/
3053
3054 /* This is called once the driver's generic options, if any, have been read.
3055 We can now find the driver, set up defaults for the private options, and
3056 unset any "set" bits in the private options table (which might have been
3057 set by another incarnation of the same driver).
3058
3059 Arguments:
3060 d pointer to driver instance block, with generic
3061 options filled in
3062 drivers_available vector of available drivers
3063 size_of_info size of each block in drivers_available
3064 class class of driver, for error message
3065
3066 Returns: pointer to the driver info block
3067 */
3068
3069 static driver_info *
3070 init_driver(driver_instance *d, driver_info *drivers_available,
3071 int size_of_info, uschar *class)
3072 {
3073 driver_info *dd;
3074
3075 for (dd = drivers_available; dd->driver_name[0] != 0;
3076 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3077 {
3078 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3079 {
3080 int i;
3081 int len = dd->options_len;
3082 d->info = dd;
3083 d->options_block = store_get(len);
3084 memcpy(d->options_block, dd->options_block, len);
3085 for (i = 0; i < *(dd->options_count); i++)
3086 dd->options[i].type &= ~opt_set;
3087 return dd;
3088 }
3089 }
3090
3091 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3092 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3093
3094 return NULL; /* never obeyed */
3095 }
3096
3097
3098
3099
3100 /*************************************************
3101 * Initialize driver list *
3102 *************************************************/
3103
3104 /* This function is called for routers, transports, and authentication
3105 mechanisms. It reads the data from the current point in the configuration file
3106 up to the end of the section, and sets up a chain of instance blocks according
3107 to the file's contents. The file will already have been opened by a call to
3108 readconf_main, and must be left open for subsequent reading of further data.
3109
3110 Any errors cause a panic crash. Note that the blocks with names driver_info and
3111 driver_instance must map the first portions of all the _info and _instance
3112 blocks for this shared code to work.
3113
3114 Arguments:
3115 class "router", "transport", or "authenticator"
3116 anchor &routers, &transports, &auths
3117 drivers_available available drivers
3118 size_of_info size of each info block
3119 instance_default points to default data for an instance
3120 instance_size size of instance block
3121 driver_optionlist generic option list
3122 driver_optionlist_count count of generic option list
3123
3124 Returns: nothing
3125 */
3126
3127 void
3128 readconf_driver_init(
3129 uschar *class,
3130 driver_instance **anchor,
3131 driver_info *drivers_available,
3132 int size_of_info,
3133 void *instance_default,
3134 int instance_size,
3135 optionlist *driver_optionlist,
3136 int driver_optionlist_count)
3137 {
3138 driver_instance **p = anchor;
3139 driver_instance *d = NULL;
3140 uschar *buffer;
3141
3142 while ((buffer = get_config_line()) != NULL)
3143 {
3144 uschar name[64];
3145 uschar *s;
3146
3147 /* Read the first name on the line and test for the start of a new driver. A
3148 macro definition indicates the end of the previous driver. If this isn't the
3149 start of a new driver, the line will be re-read. */
3150
3151 s = readconf_readname(name, sizeof(name), buffer);
3152
3153 /* Handle macro definition, first finishing off the initialization of the
3154 previous driver, if any. */
3155
3156 if (isupper(*name) && *s == '=')
3157 {
3158 if (d != NULL)
3159 {
3160 if (d->driver_name == NULL)
3161 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3162 "no driver defined for %s \"%s\"", class, d->name);
3163 (d->info->init)(d);
3164 d = NULL;
3165 }
3166 read_macro_assignment(buffer);
3167 continue;
3168 }
3169
3170 /* If the line starts with a name terminated by a colon, we are at the
3171 start of the definition of a new driver. The rest of the line must be
3172 blank. */
3173
3174 if (*s++ == ':')
3175 {
3176 int i;
3177
3178 /* Finish off initializing the previous driver. */
3179
3180 if (d != NULL)
3181 {
3182 if (d->driver_name == NULL)
3183 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3184 "no driver defined for %s \"%s\"", class, d->name);
3185 (d->info->init)(d);
3186 }
3187
3188 /* Check that we haven't already got a driver of this name */
3189
3190 for (d = *anchor; d != NULL; d = d->next)
3191 if (Ustrcmp(name, d->name) == 0)
3192 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3193 "there are two %ss called \"%s\"", class, name);
3194
3195 /* Set up a new driver instance data block on the chain, with
3196 its default values installed. */
3197
3198 d = store_get(instance_size);
3199 memcpy(d, instance_default, instance_size);
3200 *p = d;
3201 p = &(d->next);
3202 d->name = string_copy(name);
3203
3204 /* Clear out the "set" bits in the generic options */
3205
3206 for (i = 0; i < driver_optionlist_count; i++)
3207 driver_optionlist[i].type &= ~opt_set;
3208
3209 /* Check nothing more on this line, then do the next loop iteration. */
3210
3211 while (isspace(*s)) s++;
3212 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3213 continue;
3214 }
3215
3216 /* Not the start of a new driver. Give an error if we have not set up a
3217 current driver yet. */
3218
3219 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3220 "%s name missing", class);
3221
3222 /* First look to see if this is a generic option; if it is "driver",
3223 initialize the driver. If is it not a generic option, we can look for a
3224 private option provided that the driver has been previously set up. */
3225
3226 if (readconf_handle_option(buffer, driver_optionlist,
3227 driver_optionlist_count, d, NULL))
3228 {
3229 if (d->info == NULL && d->driver_name != NULL)
3230 init_driver(d, drivers_available, size_of_info, class);
3231 }
3232
3233 /* Handle private options - pass the generic block because some may
3234 live therein. A flag with each option indicates if it is in the public
3235 block. */
3236
3237 else if (d->info != NULL)
3238 {
3239 readconf_handle_option(buffer, d->info->options,
3240 *(d->info->options_count), d, US"option \"%s\" unknown");
3241 }
3242
3243 /* The option is not generic and the driver name has not yet been given. */
3244
3245 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3246 "(\"driver\" must be specified before any private options)", name);
3247 }
3248
3249 /* Run the initialization function for the final driver. */
3250
3251 if (d != NULL)
3252 {
3253 if (d->driver_name == NULL)
3254 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3255 "no driver defined for %s \"%s\"", class, d->name);
3256 (d->info->init)(d);
3257 }
3258 }
3259
3260
3261
3262 /*************************************************
3263 * Check driver dependency *
3264 *************************************************/
3265
3266 /* This function is passed a driver instance and a string. It checks whether
3267 any of the string options for the driver contains the given string as an
3268 expansion variable.
3269
3270 Arguments:
3271 d points to a driver instance block
3272 s the string to search for
3273
3274 Returns: TRUE if a dependency is found
3275 */
3276
3277 BOOL
3278 readconf_depends(driver_instance *d, uschar *s)
3279 {
3280 int count = *(d->info->options_count);
3281 optionlist *ol;
3282 uschar *ss;
3283
3284 for (ol = d->info->options; ol < d->info->options + count; ol++)
3285 {
3286 void *options_block;
3287 uschar *value;
3288 int type = ol->type & opt_mask;
3289 if (type != opt_stringptr) continue;
3290 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3291 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3292 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3293 {
3294 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3295 isalnum(ss[Ustrlen(s)])) continue;
3296 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3297 d->name, ol->name, s);
3298 return TRUE;
3299 }
3300 }
3301
3302 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3303 return FALSE;
3304 }
3305
3306
3307
3308
3309 /*************************************************
3310 * Decode an error type for retries *
3311 *************************************************/
3312
3313 /* This function is global because it is also called from the main
3314 program when testing retry information. It decodes strings such as "quota_7d"
3315 into numerical error codes.
3316
3317 Arguments:
3318 pp points to start of text
3319 p points past end of text
3320 basic_errno points to an int to receive the main error number
3321 more_errno points to an int to receive the secondary error data
3322
3323 Returns: NULL if decoded correctly; else points to error text
3324 */
3325
3326 uschar *
3327 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3328 {
3329 int len;
3330 uschar *q = pp;
3331 while (q < p && *q != '_') q++;
3332 len = q - pp;
3333
3334 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3335 {
3336 *basic_errno = ERRNO_EXIMQUOTA;
3337 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3338 return US"bad time value";
3339 }
3340
3341 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3342 {
3343 *basic_errno = ECONNREFUSED;
3344 if (q != p)
3345 {
3346 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3347 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3348 else return US"A or MX expected after \"refused\"";
3349 }
3350 }
3351
3352 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3353 {
3354 *basic_errno = ETIMEDOUT;
3355 if (q != p)
3356 {
3357 int i;
3358 int xlen = p - q - 1;
3359 uschar *x = q + 1;
3360
3361 static uschar *extras[] =
3362 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3363 static int values[] =
3364 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3365
3366 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3367 {
3368 if (strncmpic(x, extras[i], xlen) == 0)
3369 {
3370 *more_errno = values[i];
3371 break;
3372 }
3373 }
3374
3375 if (i >= sizeof(extras)/sizeof(uschar *))
3376 {
3377 if (strncmpic(x, US"DNS", xlen) == 0)
3378 {
3379 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3380 "available in retry rules (it has never worked) - treated as "
3381 "\"timeout\"");
3382 }
3383 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3384 }
3385 }
3386 }
3387
3388 else if (strncmpic(pp, US"rcpt_4", 6) == 0)
3389 {
3390 BOOL bad = FALSE;
3391 int x = 255; /* means "any 4xx code" */
3392 if (p != pp + 8) bad = TRUE; else
3393 {
3394 int a = pp[6], b = pp[7];
3395 if (isdigit(a))
3396 {
3397 x = (a - '0') * 10;
3398 if (isdigit(b)) x += b - '0';
3399 else if (b == 'x') x += 100;
3400 else bad = TRUE;
3401 }
3402 else if (a != 'x' || b != 'x') bad = TRUE;
3403 }
3404
3405 if (bad) return US"rcpt_4 must be followed by xx, dx, or dd, where "
3406 "x is literal and d is any digit";
3407
3408 *basic_errno = ERRNO_RCPT4XX;
3409 *more_errno = x << 8;
3410 }
3411
3412 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3413 strncmpic(q+1, US"failed", p-q-1) == 0)
3414 {
3415 *basic_errno = ERRNO_AUTHFAIL;
3416 }
3417
3418 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3419 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3420
3421 return NULL;
3422 }
3423
3424
3425
3426
3427 /*************************************************
3428 * Read retry information *
3429 *************************************************/
3430
3431 /* Each line of retry information contains:
3432
3433 . A domain name pattern or an address pattern;
3434
3435 . An error name, possibly with additional data, or *;
3436
3437 . An optional sequence of retry items, each consisting of an identifying
3438 letter, a cutoff time, and optional parameters.
3439
3440 All this is decoded and placed into a control block. */
3441
3442
3443 /* Subroutine to read an argument, preceded by a comma and terminated
3444 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3445 1 = fixed point number (returned *1000).
3446
3447 Arguments:
3448 paddr pointer to pointer to current character; updated
3449 type 0 => read a time; 1 => read a fixed point number
3450
3451 Returns: time in seconds or fixed point number * 1000
3452 */
3453
3454 static int
3455 retry_arg(uschar **paddr, int type)
3456 {
3457 uschar *p = *paddr;
3458 uschar *pp;
3459
3460 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3461
3462 while (isspace(*p)) p++;
3463 pp = p;
3464 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3465
3466 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3467 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3468
3469 *paddr = p;
3470 switch (type)
3471 {
3472 case 0:
3473 return readconf_readtime(pp, *p, FALSE);
3474 case 1:
3475 return readconf_readfixed(pp, *p);
3476 }
3477 return 0; /* Keep picky compilers happy */
3478 }
3479
3480 /* The function proper */
3481
3482 void
3483 readconf_retries(void)
3484 {
3485 retry_config **chain = &retries;
3486 retry_config *next;
3487 uschar *p;
3488
3489 while ((p = get_config_line()) != NULL)
3490 {
3491 retry_rule **rchain;
3492 uschar *pp, *error;
3493
3494 next = store_get(sizeof(retry_config));
3495 next->next = NULL;
3496 *chain = next;
3497 chain = &(next->next);
3498 next->basic_errno = next->more_errno = 0;
3499 next->senders = NULL;
3500 next->rules = NULL;
3501 rchain = &(next->rules);
3502
3503 next->pattern = string_dequote(&p);
3504 while (isspace(*p)) p++;
3505 pp = p;
3506 while (mac_isgraph(*p)) p++;
3507 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3508 "missing error type");
3509
3510 /* Test error names for things we understand. */
3511
3512 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3513 &(next->more_errno))) != NULL)
3514 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3515
3516 /* There may be an optional address list of senders to be used as another
3517 constraint on the rule. This was added later, so the syntax is a bit of a
3518 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3519 an address list. */
3520
3521 while (isspace(*p)) p++;
3522 if (Ustrncmp(p, "senders", 7) == 0)
3523 {
3524 p += 7;
3525 while (isspace(*p)) p++;
3526 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3527 "\"=\" expected after \"senders\" in retry rule");
3528 while (isspace(*p)) p++;
3529 next->senders = string_dequote(&p);
3530 }
3531
3532 /* Now the retry rules. Keep the maximum timeout encountered. */
3533
3534 while (isspace(*p)) p++;
3535
3536 while (*p != 0)
3537 {
3538 retry_rule *rule = store_get(sizeof(retry_rule));
3539 *rchain = rule;
3540 rchain = &(rule->next);
3541 rule->next = NULL;
3542 rule->rule = toupper(*p++);
3543 rule->timeout = retry_arg(&p, 0);
3544 if (rule->timeout > retry_maximum_timeout)
3545 retry_maximum_timeout = rule->timeout;
3546
3547 switch (rule->rule)
3548 {
3549 case 'F': /* Fixed interval */
3550 rule->p1 = retry_arg(&p, 0);
3551 break;
3552
3553 case 'G': /* Geometrically increasing intervals */
3554 rule->p1 = retry_arg(&p, 0);
3555 rule->p2 = retry_arg(&p, 1);
3556 break;
3557
3558 default:
3559 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3560 break;
3561 }
3562
3563 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3564 (rule->rule == 'G' && rule->p2 < 1000))
3565 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3566 "bad parameters for retry rule");
3567
3568 while (isspace(*p)) p++;
3569 if (*p == ';')
3570 {
3571 p++;
3572 while (isspace(*p)) p++;
3573 }
3574 else if (*p != 0)
3575 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3576 }
3577 }
3578 }
3579
3580
3581
3582 /*************************************************
3583 * Initialize authenticators *
3584 *************************************************/
3585
3586 /* Read the authenticators section of the configuration file.
3587
3588 Arguments: none
3589 Returns: nothing
3590 */
3591
3592 static void
3593 auths_init(void)
3594 {
3595 auth_instance *au, *bu;
3596 readconf_driver_init(US"authenticator",
3597 (driver_instance **)(&auths), /* chain anchor */
3598 (driver_info *)auths_available, /* available drivers */
3599 sizeof(auth_info), /* size of info block */
3600 &auth_defaults, /* default values for generic options */
3601 sizeof(auth_instance), /* size of instance block */
3602 optionlist_auths, /* generic options */
3603 optionlist_auths_size);
3604
3605 for (au = auths; au != NULL; au = au->next)
3606 {
3607 if (au->public_name == NULL)
3608 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3609 "the %s authenticator", au->name);
3610 for (bu = au->next; bu != NULL; bu = bu->next)
3611 {
3612 if (strcmpic(au->public_name, bu->public_name) == 0)
3613 {
3614 if ((au->client && bu->client) || (au->server && bu->server))
3615 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3616 "(%s and %s) have the same public name (%s)",
3617 (au->client)? US"client" : US"server", au->name, bu->name,
3618 au->public_name);
3619 }
3620 }
3621 }
3622 }
3623
3624
3625
3626
3627 /*************************************************
3628 * Read ACL information *
3629 *************************************************/
3630
3631 /* If this run of Exim is not doing something that involves receiving a
3632 message, we can just skip over the ACL information. No need to parse it.
3633
3634 First, we have a function for acl_read() to call back to get the next line. We
3635 need to remember the line we passed, because at the end it will contain the
3636 name of the next ACL. */
3637
3638 static uschar *acl_line;
3639
3640 static uschar *
3641 acl_callback(void)
3642 {
3643 acl_line = get_config_line();
3644 return acl_line;
3645 }
3646
3647
3648 /* Now the main function:
3649
3650 Arguments:
3651 skip TRUE when this Exim process is doing something that will
3652 not need the ACL data
3653
3654 Returns: nothing
3655 */
3656
3657 static void
3658 readconf_acl(BOOL skip)
3659 {
3660 uschar *p;
3661
3662 /* Not receiving messages, don't need to parse the ACL data */
3663
3664 if (skip)
3665 {
3666 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3667 while ((p = get_config_line()) != NULL);
3668 return;
3669 }
3670
3671 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3672 between ACLs. */
3673
3674 acl_line = get_config_line();
3675
3676 while(acl_line != NULL)
3677 {
3678 uschar name[64];
3679 tree_node *node;
3680 uschar *error;
3681
3682 p = readconf_readname(name, sizeof(name), acl_line);
3683 if (isupper(*name) && *p == '=')
3684 {
3685 read_macro_assignment(acl_line);
3686 acl_line = get_config_line();
3687 continue;
3688 }
3689
3690 if (*p != ':' || name[0] == 0)
3691 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3692
3693 node = store_get(sizeof(tree_node) + Ustrlen(name));
3694 Ustrcpy(node->name, name);
3695 if (!tree_insertnode(&acl_anchor, node))
3696 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3697 "there are two ACLs called \"%s\"", name);
3698
3699 node->data.ptr = acl_read(acl_callback, &error);
3700
3701 if (node->data.ptr == NULL && error != NULL)
3702 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3703 }
3704 }
3705
3706
3707
3708 /*************************************************
3709 * Read configuration for local_scan() *
3710 *************************************************/
3711
3712 /* This function is called after "begin local_scan" is encountered in the
3713 configuration file. If the local_scan() function allows for configuration
3714 options, we can process them. Otherwise, we expire in a panic.
3715
3716 Arguments: none
3717 Returns: nothing
3718 */
3719
3720 static void
3721 local_scan_init(void)
3722 {
3723 #ifndef LOCAL_SCAN_HAS_OPTIONS
3724 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3725 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3726 #else
3727
3728 uschar *p;
3729 while ((p = get_config_line()) != NULL)
3730 {
3731 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3732 NULL, US"local_scan option \"%s\" unknown");
3733 }
3734 #endif
3735 }
3736
3737
3738
3739 /*************************************************
3740 * Read rest of configuration (after main) *
3741 *************************************************/
3742
3743 /* This function reads the rest of the runtime configuration, after the main
3744 configuration. It is called only when actually needed. Each subsequent section
3745 of the configuration starts with a line of the form
3746
3747 begin name
3748
3749 where the name is "routers", "transports", etc. A section is terminated by
3750 hitting the next "begin" line, and the next name is left in next_section.
3751 Because it may confuse people as to whether the names are singular or plural,
3752 we add "s" if it's missing. There is always enough room in next_section for
3753 this. This function is basically just a switch.
3754
3755 Arguments:
3756 skip_acl TRUE if ACL information is not needed
3757
3758 Returns: nothing
3759 */
3760
3761 static uschar *section_list[] = {
3762 US"acls",
3763 US"authenticators",
3764 US"local_scans",
3765 US"retrys",
3766 US"rewrites",
3767 US"routers",
3768 US"transports"};
3769
3770 void
3771 readconf_rest(BOOL skip_acl)
3772 {
3773 int had = 0;
3774
3775 while(next_section[0] != 0)
3776 {
3777 int bit;
3778 int first = 0;
3779 int last = sizeof(section_list) / sizeof(uschar *);
3780 int mid = last/2;
3781 int n = Ustrlen(next_section);
3782
3783 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3784
3785 for (;;)
3786 {
3787 int c = strcmpic(next_section, section_list[mid]);
3788 if (c == 0) break;
3789 if (c > 0) first = mid + 1; else last = mid;
3790 if (first >= last)
3791 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3792 "\"%.*s\" is not a known configuration section name", n, next_section);
3793 mid = (last + first)/2;
3794 }
3795
3796 bit = 1 << mid;
3797 if (((had ^= bit) & bit) == 0)
3798 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3799 "\"%.*s\" section is repeated in the configuration file", n,
3800 next_section);
3801
3802 switch(mid)
3803 {
3804 case 0: readconf_acl(skip_acl); break;
3805 case 1: auths_init(); break;
3806 case 2: local_scan_init(); break;
3807 case 3: readconf_retries(); break;
3808 case 4: readconf_rewrites(); break;
3809 case 5: route_init(); break;
3810 case 6: transport_init(); break;
3811 }
3812 }
3813
3814 (void)fclose(config_file);
3815 }
3816
3817 /* End of readconf.c */
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