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[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.8 2005/05/10 10:19:11 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 { "delay_warning", opt_timelist, &delay_warning },
190 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
191 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
192 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
193 { "delivery_date_remove", opt_bool, &delivery_date_remove },
194 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
195 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
196 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
197 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
198 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
199 { "dns_retrans", opt_time, &dns_retrans },
200 { "dns_retry", opt_int, &dns_retry },
201 /* This option is now a no-op, retained for compability */
202 { "drop_cr", opt_bool, &drop_cr },
203 /*********************************************************/
204 { "envelope_to_remove", opt_bool, &envelope_to_remove },
205 { "errors_copy", opt_stringptr, &errors_copy },
206 { "errors_reply_to", opt_stringptr, &errors_reply_to },
207 { "exim_group", opt_gid, &exim_gid },
208 { "exim_path", opt_stringptr, &exim_path },
209 { "exim_user", opt_uid, &exim_uid },
210 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
211 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
212 { "finduser_retries", opt_int, &finduser_retries },
213 { "freeze_tell", opt_stringptr, &freeze_tell },
214 { "gecos_name", opt_stringptr, &gecos_name },
215 { "gecos_pattern", opt_stringptr, &gecos_pattern },
216 { "header_line_maxsize", opt_int, &header_line_maxsize },
217 { "header_maxsize", opt_int, &header_maxsize },
218 { "headers_charset", opt_stringptr, &headers_charset },
219 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
220 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
221 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
222 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
223 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
224 { "hold_domains", opt_stringptr, &hold_domains },
225 { "host_lookup", opt_stringptr, &host_lookup },
226 { "host_lookup_order", opt_stringptr, &host_lookup_order },
227 { "host_reject_connection", opt_stringptr, &host_reject_connection },
228 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
229 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
230 #ifdef LOOKUP_IBASE
231 { "ibase_servers", opt_stringptr, &ibase_servers },
232 #endif
233 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
234 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
235 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
236 { "keep_malformed", opt_time, &keep_malformed },
237 #ifdef LOOKUP_LDAP
238 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
239 { "ldap_version", opt_int, &eldap_version },
240 #endif
241 { "local_from_check", opt_bool, &local_from_check },
242 { "local_from_prefix", opt_stringptr, &local_from_prefix },
243 { "local_from_suffix", opt_stringptr, &local_from_suffix },
244 { "local_interfaces", opt_stringptr, &local_interfaces },
245 { "local_scan_timeout", opt_time, &local_scan_timeout },
246 { "local_sender_retain", opt_bool, &local_sender_retain },
247 { "localhost_number", opt_stringptr, &host_number_string },
248 { "log_file_path", opt_stringptr, &log_file_path },
249 { "log_selector", opt_stringptr, &log_selector_string },
250 { "log_timezone", opt_bool, &log_timezone },
251 { "lookup_open_max", opt_int, &lookup_open_max },
252 { "max_username_length", opt_int, &max_username_length },
253 { "message_body_visible", opt_mkint, &message_body_visible },
254 { "message_id_header_domain", opt_stringptr, &message_id_domain },
255 { "message_id_header_text", opt_stringptr, &message_id_text },
256 { "message_logs", opt_bool, &message_logs },
257 { "message_size_limit", opt_stringptr, &message_size_limit },
258 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
259 { "move_frozen_messages", opt_bool, &move_frozen_messages },
260 #endif
261 { "mua_wrapper", opt_bool, &mua_wrapper },
262 #ifdef LOOKUP_MYSQL
263 { "mysql_servers", opt_stringptr, &mysql_servers },
264 #endif
265 { "never_users", opt_uidlist, &never_users },
266 #ifdef LOOKUP_ORACLE
267 { "oracle_servers", opt_stringptr, &oracle_servers },
268 #endif
269 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
270 #ifdef EXIM_PERL
271 { "perl_at_start", opt_bool, &opt_perl_at_start },
272 { "perl_startup", opt_stringptr, &opt_perl_startup },
273 #endif
274 #ifdef LOOKUP_PGSQL
275 { "pgsql_servers", opt_stringptr, &pgsql_servers },
276 #endif
277 { "pid_file_path", opt_stringptr, &pid_file_path },
278 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
279 { "preserve_message_logs", opt_bool, &preserve_message_logs },
280 { "primary_hostname", opt_stringptr, &primary_hostname },
281 { "print_topbitchars", opt_bool, &print_topbitchars },
282 { "process_log_path", opt_stringptr, &process_log_path },
283 { "prod_requires_admin", opt_bool, &prod_requires_admin },
284 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
285 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
286 { "queue_domains", opt_stringptr, &queue_domains },
287 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
288 { "queue_only", opt_bool, &queue_only },
289 { "queue_only_file", opt_stringptr, &queue_only_file },
290 { "queue_only_load", opt_fixed, &queue_only_load },
291 { "queue_only_override", opt_bool, &queue_only_override },
292 { "queue_run_in_order", opt_bool, &queue_run_in_order },
293 { "queue_run_max", opt_int, &queue_run_max },
294 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
295 { "receive_timeout", opt_time, &receive_timeout },
296 { "received_header_text", opt_stringptr, &received_header_text },
297 { "received_headers_max", opt_int, &received_headers_max },
298 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
299 { "recipients_max", opt_int, &recipients_max },
300 { "recipients_max_reject", opt_bool, &recipients_max_reject },
301 { "remote_max_parallel", opt_int, &remote_max_parallel },
302 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
303 { "retry_data_expire", opt_time, &retry_data_expire },
304 { "retry_interval_max", opt_time, &retry_interval_max },
305 { "return_path_remove", opt_bool, &return_path_remove },
306 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
307 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
308 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
309 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
310 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
311 { "smtp_accept_max", opt_int, &smtp_accept_max },
312 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
313 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
314 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
315 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
316 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
317 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
318 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
319 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
320 { "smtp_banner", opt_stringptr, &smtp_banner },
321 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
322 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
323 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
324 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
325 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
326 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
327 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
328 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
329 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
330 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
331 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
332 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
333 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
334 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
335 #ifdef WITH_CONTENT_SCAN
336 { "spamd_address", opt_stringptr, &spamd_address },
337 #endif
338 { "split_spool_directory", opt_bool, &split_spool_directory },
339 { "spool_directory", opt_stringptr, &spool_directory },
340 #ifdef EXPERIMENTAL_SRS
341 { "srs_config", opt_stringptr, &srs_config },
342 #endif
343 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
344 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
345 { "syslog_duplication", opt_bool, &syslog_duplication },
346 { "syslog_facility", opt_stringptr, &syslog_facility_str },
347 { "syslog_processname", opt_stringptr, &syslog_processname },
348 { "syslog_timestamp", opt_bool, &syslog_timestamp },
349 { "system_filter", opt_stringptr, &system_filter },
350 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
351 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
352 { "system_filter_group", opt_gid, &system_filter_gid },
353 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
354 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
355 { "system_filter_user", opt_uid, &system_filter_uid },
356 { "tcp_nodelay", opt_bool, &tcp_nodelay },
357 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
358 { "timezone", opt_stringptr, &timezone_string },
359 #ifdef SUPPORT_TLS
360 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
361 { "tls_certificate", opt_stringptr, &tls_certificate },
362 { "tls_crl", opt_stringptr, &tls_crl },
363 { "tls_dhparam", opt_stringptr, &tls_dhparam },
364 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
365 { "tls_privatekey", opt_stringptr, &tls_privatekey },
366 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
367 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
368 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
369 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
370 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
371 #endif
372 { "trusted_groups", opt_gidlist, &trusted_groups },
373 { "trusted_users", opt_uidlist, &trusted_users },
374 { "unknown_login", opt_stringptr, &unknown_login },
375 { "unknown_username", opt_stringptr, &unknown_username },
376 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
377 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
378 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
379 { "warn_message_file", opt_stringptr, &warn_message_file },
380 { "write_rejectlog", opt_bool, &write_rejectlog }
381 };
382
383 static int optionlist_config_size =
384 sizeof(optionlist_config)/sizeof(optionlist);
385
386
387
388 /*************************************************
389 * Find the name of an option *
390 *************************************************/
391
392 /* This function is to aid debugging. Various functions take arguments that are
393 pointer variables in the options table or in option tables for various drivers.
394 For debugging output, it is useful to be able to find the name of the option
395 which is currently being processed. This function finds it, if it exists, by
396 searching the table(s).
397
398 Arguments: a value that is presumed to be in the table above
399 Returns: the option name, or an empty string
400 */
401
402 uschar *
403 readconf_find_option(void *p)
404 {
405 int i;
406 router_instance *r;
407 transport_instance *t;
408
409 for (i = 0; i < optionlist_config_size; i++)
410 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
411
412 for (r = routers; r != NULL; r = r->next)
413 {
414 router_info *ri = r->info;
415 for (i = 0; i < ri->options_count[0]; i++)
416 {
417 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
418 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
419 return US ri->options[i].name;
420 }
421 }
422
423 for (t = transports; t != NULL; t = t->next)
424 {
425 transport_info *ti = t->info;
426 for (i = 0; i < ti->options_count[0]; i++)
427 {
428 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
429 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
430 return US ti->options[i].name;
431 }
432 }
433
434 return US"";
435 }
436
437
438
439
440 /*************************************************
441 * Deal with an assignment to a macro *
442 *************************************************/
443
444 /* This function is called when a line that starts with an upper case letter is
445 encountered. The argument "line" should contain a complete logical line, and
446 start with the first letter of the macro name. The macro name and the
447 replacement text are extracted and stored. Redefinition of existing,
448 non-command line, macros is permitted using '==' instead of '='.
449
450 Arguments:
451 s points to the start of the logical line
452
453 Returns: nothing
454 */
455
456 static void
457 read_macro_assignment(uschar *s)
458 {
459 uschar name[64];
460 int namelen = 0;
461 BOOL redef = FALSE;
462 macro_item *m;
463 macro_item *mlast = NULL;
464
465 while (isalnum(*s) || *s == '_')
466 {
467 if (namelen >= sizeof(name) - 1)
468 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
469 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
470 name[namelen++] = *s++;
471 }
472 name[namelen] = 0;
473
474 while (isspace(*s)) s++;
475 if (*s++ != '=')
476 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
477
478 if (*s == '=')
479 {
480 redef = TRUE;
481 s++;
482 }
483 while (isspace(*s)) s++;
484
485 /* If an existing macro of the same name was defined on the command line, we
486 just skip this definition. It's an error to attempt to redefine a macro without
487 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
488 It is also an error to define a macro whose name begins with the name of a
489 previously defined macro. Note: it is documented that the other way round
490 works. */
491
492 for (m = macros; m != NULL; m = m->next)
493 {
494 int len = Ustrlen(m->name);
495
496 if (Ustrcmp(m->name, name) == 0)
497 {
498 if (!m->command_line && !redef)
499 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
500 "defined (use \"==\" if you want to redefine it", name);
501 break;
502 }
503
504 if (len < namelen && Ustrstr(name, m->name) != NULL)
505 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
506 "a macro because previously defined macro \"%s\" is a substring",
507 name, m->name);
508
509 /* We cannot have this test, because it is documented that a substring
510 macro is permitted (there is even an example).
511 *
512 * if (len > namelen && Ustrstr(m->name, name) != NULL)
513 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
514 * "a macro because it is a substring of previously defined macro \"%s\"",
515 * name, m->name);
516 */
517
518 mlast = m;
519 }
520
521 /* Check for an overriding command-line definition. */
522
523 if (m != NULL && m->command_line) return;
524
525 /* Redefinition must refer to an existing macro. */
526
527 if (redef)
528 {
529 if (m == NULL)
530 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
531 "\"%s\"", name);
532 }
533
534 /* We have a new definition. The macro_item structure includes a final vector
535 called "name" which is one byte long. Thus, adding "namelen" gives us enough
536 room to store the "name" string. */
537
538 else
539 {
540 m = store_get(sizeof(macro_item) + namelen);
541 if (macros == NULL) macros = m; else mlast->next = m;
542 Ustrncpy(m->name, name, namelen);
543 m->name[namelen] = 0;
544 m->next = NULL;
545 m->command_line = FALSE;
546 }
547
548 /* Set the value of the new or redefined macro */
549
550 m->replacement = string_copy(s);
551 }
552
553
554
555
556
557 /*************************************************
558 * Read configuration line *
559 *************************************************/
560
561 /* A logical line of text is read from the configuration file into the big
562 buffer, taking account of macros, .includes, and continuations. The size of
563 big_buffer is increased if necessary. The count of configuration lines is
564 maintained. Physical input lines starting with # (ignoring leading white space,
565 and after macro replacement) and empty logical lines are always ignored.
566 Leading and trailing spaces are removed.
567
568 If we hit a line of the form "begin xxxx", the xxxx is placed in the
569 next_section vector, and the function returns NULL, indicating the end of a
570 configuration section. On end-of-file, NULL is returned with next_section
571 empty.
572
573 Arguments: none
574
575 Returns: a pointer to the first non-blank in the line,
576 or NULL if eof or end of section is reached
577 */
578
579 static uschar *
580 get_config_line(void)
581 {
582 int startoffset = 0; /* To first non-blank char in logical line */
583 int len = 0; /* Of logical line so far */
584 int newlen;
585 uschar *s, *ss;
586 macro_item *m;
587 BOOL macro_found;
588
589 /* Loop for handling continuation lines, skipping comments, and dealing with
590 .include files. */
591
592 for (;;)
593 {
594 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
595 {
596 if (config_file_stack != NULL) /* EOF inside .include */
597 {
598 fclose(config_file);
599 config_file = config_file_stack->file;
600 config_filename = config_file_stack->filename;
601 config_lineno = config_file_stack->lineno;
602 config_file_stack = config_file_stack->next;
603 continue;
604 }
605
606 /* EOF at top level */
607
608 if (cstate_stack_ptr >= 0)
609 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
610 "Unexpected end of configuration file: .endif missing");
611
612 if (len != 0) break; /* EOF after continuation */
613 next_section[0] = 0; /* EOF at start of logical line */
614 return NULL;
615 }
616
617 config_lineno++;
618 newlen = len + Ustrlen(big_buffer + len);
619
620 /* Handle pathologically long physical lines - yes, it did happen - by
621 extending big_buffer at this point. The code also copes with very long
622 logical lines. */
623
624 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
625 {
626 uschar *newbuffer;
627 big_buffer_size += BIG_BUFFER_SIZE;
628 newbuffer = store_malloc(big_buffer_size);
629
630 /* This use of strcpy is OK because we know that the string in the old
631 buffer is shorter than the new buffer. */
632
633 Ustrcpy(newbuffer, big_buffer);
634 store_free(big_buffer);
635 big_buffer = newbuffer;
636 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
637 break;
638 newlen += Ustrlen(big_buffer + newlen);
639 }
640
641 /* Find the true start of the physical line - leading spaces are always
642 ignored. */
643
644 ss = big_buffer + len;
645 while (isspace(*ss)) ss++;
646
647 /* Process the physical line for macros. If this is the start of the logical
648 line, skip over initial text at the start of the line if it starts with an
649 upper case character followed by a sequence of name characters and an equals
650 sign, because that is the definition of a new macro, and we don't do
651 replacement therein. */
652
653 s = ss;
654 if (len == 0 && isupper(*s))
655 {
656 while (isalnum(*s) || *s == '_') s++;
657 while (isspace(*s)) s++;
658 if (*s != '=') s = ss; /* Not a macro definition */
659 }
660
661 /* For each defined macro, scan the line (from after XXX= if present),
662 replacing all occurrences of the macro. */
663
664 macro_found = FALSE;
665 for (m = macros; m != NULL; m = m->next)
666 {
667 uschar *p, *pp;
668 uschar *t = s;
669
670 while ((p = Ustrstr(t, m->name)) != NULL)
671 {
672 int moveby;
673 int namelen = Ustrlen(m->name);
674 int replen = Ustrlen(m->replacement);
675
676 /* Expand the buffer if necessary */
677
678 while (newlen - namelen + replen + 1 > big_buffer_size)
679 {
680 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
681 uschar *newbuffer = store_malloc(newsize);
682 memcpy(newbuffer, big_buffer, newlen + 1);
683 p = newbuffer + (p - big_buffer);
684 s = newbuffer + (s - big_buffer);
685 ss = newbuffer + (ss - big_buffer);
686 t = newbuffer + (t - big_buffer);
687 big_buffer_size = newsize;
688 store_free(big_buffer);
689 big_buffer = newbuffer;
690 }
691
692 /* Shuffle the remaining characters up or down in the buffer before
693 copying in the replacement text. Don't rescan the replacement for this
694 same macro. */
695
696 pp = p + namelen;
697 moveby = replen - namelen;
698 if (moveby != 0)
699 {
700 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
701 newlen += moveby;
702 }
703 Ustrncpy(p, m->replacement, replen);
704 t = p + replen;
705 macro_found = TRUE;
706 }
707 }
708
709 /* An empty macro replacement at the start of a line could mean that ss no
710 longer points to the first non-blank character. */
711
712 while (isspace(*ss)) ss++;
713
714 /* Check for comment lines - these are physical lines. */
715
716 if (*ss == '#') continue;
717
718 /* Handle conditionals, which are also applied to physical lines. Conditions
719 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
720 expansion occured on the rest of the line. A preliminary test for the leading
721 '.' saves effort on most lines. */
722
723 if (*ss == '.')
724 {
725 int i;
726
727 /* Search the list of conditional directives */
728
729 for (i = 0; i < cond_list_size; i++)
730 {
731 int n;
732 cond_item *c = cond_list+i;
733 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
734
735 /* The following character must be white space or end of string */
736
737 n = ss[1 + c->namelen];
738 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
739
740 /* .ifdef and .ifndef push the current state onto the stack, then set
741 a new one from the table. Stack overflow is an error */
742
743 if (c->pushpop > 0)
744 {
745 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
746 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
747 ".%s nested too deeply", c->name);
748 cstate_stack[++cstate_stack_ptr] = cstate;
749 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
750 }
751
752 /* For any of the others, stack underflow is an error. The next state
753 comes either from the stack (.endif) or from the table. */
754
755 else
756 {
757 if (cstate_stack_ptr < 0)
758 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
759 ".%s without matching .ifdef", c->name);
760 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
761 next_cstate[cstate][macro_found? c->action1 : c->action2];
762 }
763
764 /* Having dealt with a directive, break the loop */
765
766 break;
767 }
768
769 /* If we have handled a conditional directive, continue with the next
770 physical line. Otherwise, fall through. */
771
772 if (i < cond_list_size) continue;
773 }
774
775 /* If the conditional state is not 0 (actively using these lines), ignore
776 this input line. */
777
778 if (cstate != 0) continue; /* Conditional skip */
779
780 /* Handle .include lines - these are also physical lines. */
781
782 if (Ustrncmp(ss, ".include", 8) == 0 &&
783 (isspace(ss[8]) ||
784 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
785 {
786 uschar *t;
787 int include_if_exists = isspace(ss[8])? 0 : 10;
788 config_file_item *save;
789 struct stat statbuf;
790
791 ss += 9 + include_if_exists;
792 while (isspace(*ss)) ss++;
793 t = ss + Ustrlen(ss);
794 while (t > ss && isspace(t[-1])) t--;
795 if (*ss == '\"' && t[-1] == '\"')
796 {
797 ss++;
798 t--;
799 }
800 *t = 0;
801
802 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
803
804 save = store_get(sizeof(config_file_item));
805 save->next = config_file_stack;
806 config_file_stack = save;
807 save->file = config_file;
808 save->filename = config_filename;
809 save->lineno = config_lineno;
810
811 config_file = Ufopen(ss, "rb");
812 if (config_file == NULL)
813 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
814 "configuration file %s", ss);
815 config_filename = string_copy(ss);
816 config_lineno = 0;
817 continue;
818 }
819
820 /* If this is the start of the logical line, remember where the non-blank
821 data starts. Otherwise shuffle down continuation lines to remove leading
822 white space. */
823
824 if (len == 0)
825 startoffset = ss - big_buffer;
826 else
827 {
828 s = big_buffer + len;
829 if (ss > s)
830 {
831 memmove(s, ss, (newlen - len) - (ss - s) + 1);
832 newlen -= ss - s;
833 }
834 }
835
836 /* Accept the new addition to the line. Remove trailing white space. */
837
838 len = newlen;
839 while (len > 0 && isspace(big_buffer[len-1])) len--;
840 big_buffer[len] = 0;
841
842 /* We are done if the line does not end in backslash and contains some data.
843 Empty logical lines are ignored. For continuations, remove the backslash and
844 go round the loop to read the continuation line. */
845
846 if (len > 0)
847 {
848 if (big_buffer[len-1] != '\\') break; /* End of logical line */
849 big_buffer[--len] = 0; /* Remove backslash */
850 }
851 } /* Loop for reading multiple physical lines */
852
853 /* We now have a logical line. Test for the end of a configuration section (or,
854 more accurately, for the start of the next section). Place the name of the next
855 section in next_section, and return NULL. If the name given is longer than
856 next_section, truncate it. It will be unrecognized later, because all the known
857 section names do fit. Leave space for pluralizing. */
858
859 s = big_buffer + startoffset; /* First non-space character */
860 if (strncmpic(s, US"begin ", 6) == 0)
861 {
862 s += 6;
863 while (isspace(*s)) s++;
864 if (big_buffer + len - s > sizeof(next_section) - 2)
865 s[sizeof(next_section) - 2] = 0;
866 Ustrcpy(next_section, s);
867 return NULL;
868 }
869
870 /* Return the first non-blank character. */
871
872 return s;
873 }
874
875
876
877 /*************************************************
878 * Read a name *
879 *************************************************/
880
881 /* The yield is the pointer to the next uschar. Names longer than the
882 output space are silently truncated. This function is also used from acl.c when
883 parsing ACLs.
884
885 Arguments:
886 name where to put the name
887 len length of name
888 s input pointer
889
890 Returns: new input pointer
891 */
892
893 uschar *
894 readconf_readname(uschar *name, int len, uschar *s)
895 {
896 int p = 0;
897 while (isspace(*s)) s++;
898 if (isalpha(*s))
899 {
900 while (isalnum(*s) || *s == '_')
901 {
902 if (p < len-1) name[p++] = *s;
903 s++;
904 }
905 }
906 name[p] = 0;
907 while (isspace(*s)) s++;
908 return s;
909 }
910
911
912
913
914 /*************************************************
915 * Read a time value *
916 *************************************************/
917
918 /* This function is also called from outside, to read argument
919 time values. The format of a time value is:
920
921 [<n>w][<n>d][<n>h][<n>m][<n>s]
922
923 as long as at least one is present. If a format error is encountered,
924 return a negative value. The value must be terminated by the given
925 terminator.
926
927 Arguments:
928 s input pointer
929 terminator required terminating character
930 return_msec if TRUE, allow fractional seconds and return milliseconds
931
932 Returns: the time value, or -1 on syntax error
933 value is seconds if return_msec is FALSE
934 value is milliseconds if return_msec is TRUE
935 */
936
937 int
938 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
939 {
940 int yield = 0;
941 for (;;)
942 {
943 int value, count;
944 double fraction;
945
946 if (!isdigit(*s)) return -1;
947 (void)sscanf(CS s, "%d%n", &value, &count);
948 s += count;
949
950 switch (*s)
951 {
952 case 'w': value *= 7;
953 case 'd': value *= 24;
954 case 'h': value *= 60;
955 case 'm': value *= 60;
956 case 's': s++;
957 break;
958
959 case '.':
960 if (!return_msec) return -1;
961 (void)sscanf(CS s, "%lf%n", &fraction, &count);
962 s += count;
963 if (*s++ != 's') return -1;
964 yield += (int)(fraction * 1000.0);
965 break;
966
967 default: return -1;
968 }
969
970 if (return_msec) value *= 1000;
971 yield += value;
972 if (*s == terminator) return yield;
973 }
974 /* Control never reaches here. */
975 }
976
977
978
979 /*************************************************
980 * Read a fixed point value *
981 *************************************************/
982
983 /* The value is returned *1000
984
985 Arguments:
986 s input pointer
987 terminator required terminator
988
989 Returns: the value, or -1 on error
990 */
991
992 static int
993 readconf_readfixed(uschar *s, int terminator)
994 {
995 int yield = 0;
996 int value, count;
997 if (!isdigit(*s)) return -1;
998 (void)sscanf(CS s, "%d%n", &value, &count);
999 s += count;
1000 yield = value * 1000;
1001 if (*s == '.')
1002 {
1003 int m = 100;
1004 while (isdigit((*(++s))))
1005 {
1006 yield += (*s - '0') * m;
1007 m /= 10;
1008 }
1009 }
1010
1011 return (*s == terminator)? yield : (-1);
1012 }
1013
1014
1015
1016 /*************************************************
1017 * Find option in list *
1018 *************************************************/
1019
1020 /* The lists are always in order, so binary chop can be used.
1021
1022 Arguments:
1023 name the option name to search for
1024 ol the first entry in the option list
1025 last one more than the offset of the last entry in the option list
1026
1027 Returns: pointer to an option entry, or NULL if not found
1028 */
1029
1030 static optionlist *
1031 find_option(uschar *name, optionlist *ol, int last)
1032 {
1033 int first = 0;
1034 while (last > first)
1035 {
1036 int middle = (first + last)/2;
1037 int c = Ustrcmp(name, ol[middle].name);
1038 if (c == 0) return ol + middle;
1039 else if (c > 0) first = middle + 1;
1040 else last = middle;
1041 }
1042 return NULL;
1043 }
1044
1045
1046
1047 /*************************************************
1048 * Find a set flag in option list *
1049 *************************************************/
1050
1051 /* Because some versions of Unix make no restrictions on the values of uids and
1052 gids (even negative ones), we cannot represent "unset" by a special value.
1053 There is therefore a separate boolean variable for each one indicating whether
1054 a value is set or not. This function returns a pointer to the boolean, given
1055 the original option name. It is a major disaster if the flag cannot be found.
1056
1057 Arguments:
1058 name the name of the uid or gid option
1059 oltop points to the start of the relevant option list
1060 last one more than the offset of the last item in the option list
1061 data_block NULL when reading main options => data values in the option
1062 list are absolute addresses; otherwise they are byte offsets
1063 in data_block (used for driver options)
1064
1065 Returns: a pointer to the boolean flag.
1066 */
1067
1068 static BOOL *
1069 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1070 {
1071 optionlist *ol;
1072 uschar name2[64];
1073 sprintf(CS name2, "*set_%.50s", name);
1074 ol = find_option(name2, oltop, last);
1075 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1076 "Exim internal error: missing set flag for %s", name);
1077 return (data_block == NULL)? (BOOL *)(ol->value) :
1078 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1079 }
1080
1081
1082
1083
1084 /*************************************************
1085 * Output extra characters message and die *
1086 *************************************************/
1087
1088 /* Called when an option line has junk on the end. Sometimes this is because
1089 the sysadmin thinks comments are permitted.
1090
1091 Arguments:
1092 s points to the extra characters
1093 t1..t3 strings to insert in the log message
1094
1095 Returns: doesn't return; dies
1096 */
1097
1098 static void
1099 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1100 {
1101 uschar *comment = US"";
1102 if (*s == '#') comment = US" (# is comment only at line start)";
1103 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1104 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1105 }
1106
1107
1108
1109 /*************************************************
1110 * Read rewrite information *
1111 *************************************************/
1112
1113 /* Each line of rewrite information contains:
1114
1115 . A complete address in the form user@domain, possibly with
1116 leading * for each part; or alternatively, a regex.
1117
1118 . A replacement string (which will be expanded).
1119
1120 . An optional sequence of one-letter flags, indicating which
1121 headers etc. to apply this rule to.
1122
1123 All this is decoded and placed into a control block. The OR of the flags is
1124 maintained in a common word.
1125
1126 Arguments:
1127 p points to the string that makes up the rule
1128 existflags points to the overall flag word
1129 isglobal TRUE if reading global rewrite rules
1130
1131 Returns: the control block for the parsed rule.
1132 */
1133
1134 static rewrite_rule *
1135 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1136 {
1137 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1138
1139 next->next = NULL;
1140 next->key = string_dequote(&p);
1141
1142 while (isspace(*p)) p++;
1143 if (*p == 0)
1144 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1145 "missing rewrite replacement string");
1146
1147 next->flags = 0;
1148 next->replacement = string_dequote(&p);
1149
1150 while (*p != 0) switch (*p++)
1151 {
1152 case ' ': case '\t': break;
1153
1154 case 'q': next->flags |= rewrite_quit; break;
1155 case 'w': next->flags |= rewrite_whole; break;
1156
1157 case 'h': next->flags |= rewrite_all_headers; break;
1158 case 's': next->flags |= rewrite_sender; break;
1159 case 'f': next->flags |= rewrite_from; break;
1160 case 't': next->flags |= rewrite_to; break;
1161 case 'c': next->flags |= rewrite_cc; break;
1162 case 'b': next->flags |= rewrite_bcc; break;
1163 case 'r': next->flags |= rewrite_replyto; break;
1164
1165 case 'E': next->flags |= rewrite_all_envelope; break;
1166 case 'F': next->flags |= rewrite_envfrom; break;
1167 case 'T': next->flags |= rewrite_envto; break;
1168
1169 case 'Q': next->flags |= rewrite_qualify; break;
1170 case 'R': next->flags |= rewrite_repeat; break;
1171
1172 case 'S':
1173 next->flags |= rewrite_smtp;
1174 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1175 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1176 "rewrite rule has the S flag but is not a regular expression");
1177 break;
1178
1179 default:
1180 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1181 "unknown rewrite flag character '%c' "
1182 "(could be missing quotes round replacement item)", p[-1]);
1183 break;
1184 }
1185
1186 /* If no action flags are set, set all the "normal" rewrites. */
1187
1188 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1189 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1190
1191 /* Remember which exist, for optimization, and return the rule */
1192
1193 *existflags |= next->flags;
1194 return next;
1195 }
1196
1197
1198
1199
1200 /*************************************************
1201 * Read global rewrite information *
1202 *************************************************/
1203
1204 /* Each line is a single rewrite rule; it is parsed into a control block
1205 by readconf_one_rewrite(), and its flags are ORed into the global flag
1206 word rewrite_existflags. */
1207
1208 void
1209 readconf_rewrites(void)
1210 {
1211 rewrite_rule **chain = &global_rewrite_rules;
1212 uschar *p;
1213
1214 while ((p = get_config_line()) != NULL)
1215 {
1216 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1217 *chain = next;
1218 chain = &(next->next);
1219 }
1220 }
1221
1222
1223
1224 /*************************************************
1225 * Read a string *
1226 *************************************************/
1227
1228 /* Strings are read into the normal store pool. As long we aren't too
1229 near the end of the current block, the string will just use what is necessary
1230 on the top of the stacking pool, because string_cat() uses the extension
1231 mechanism.
1232
1233 Argument:
1234 s the rest of the input line
1235 name the option name (for errors)
1236
1237 Returns: pointer to the string
1238 */
1239
1240 static uschar *
1241 read_string(uschar *s, uschar *name)
1242 {
1243 uschar *yield;
1244 uschar *ss;
1245
1246 if (*s != '\"') return string_copy(s);
1247
1248 ss = s;
1249 yield = string_dequote(&s);
1250
1251 if (s == ss+1 || s[-1] != '\"')
1252 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1253 "missing quote at end of string value for %s", name);
1254
1255 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1256
1257 return yield;
1258 }
1259
1260
1261 /*************************************************
1262 * Handle option line *
1263 *************************************************/
1264
1265 /* This function is called from several places to process a line containing the
1266 setting of an option. The first argument is the line to be decoded; it has been
1267 checked not to be empty and not to start with '#'. Trailing newlines and white
1268 space have been removed. The second argument is a pointer to the list of
1269 variable names that are to be recognized, together with their types and
1270 locations, and the third argument gives the number of entries in the list.
1271
1272 The fourth argument is a pointer to a data block. If it is NULL, then the data
1273 values in the options list are absolute addresses. Otherwise, they are byte
1274 offsets in the data block.
1275
1276 String option data may continue onto several lines; this function reads further
1277 data from config_file if necessary.
1278
1279 The yield of this function is normally zero. If a string continues onto
1280 multiple lines, then the data value is permitted to be followed by a comma
1281 or a semicolon (for use in drivers) and the yield is that character.
1282
1283 Arguments:
1284 buffer contains the configuration line to be handled
1285 oltop points to the start of the relevant option list
1286 last one more than the offset of the last item in the option list
1287 data_block NULL when reading main options => data values in the option
1288 list are absolute addresses; otherwise they are byte offsets
1289 in data_block when they have opt_public set; otherwise
1290 they are byte offsets in data_block->options_block.
1291 unknown_txt format string to use in panic message for unknown option;
1292 must contain %s for option name
1293 if given as NULL, don't panic on unknown option
1294
1295 Returns: TRUE if an option was read successfully,
1296 FALSE false for an unknown option if unknown_txt == NULL,
1297 otherwise panic and die on an unknown option
1298 */
1299
1300 static BOOL
1301 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1302 void *data_block, uschar *unknown_txt)
1303 {
1304 int ptr = 0;
1305 int offset = 0;
1306 int n, count, type, value;
1307 int issecure = 0;
1308 uid_t uid;
1309 gid_t gid;
1310 BOOL boolvalue = TRUE;
1311 BOOL freesptr = TRUE;
1312 optionlist *ol, *ol2;
1313 struct passwd *pw;
1314 void *reset_point;
1315 int intbase = 0;
1316 uschar *inttype = US"";
1317 uschar *sptr;
1318 uschar *s = buffer;
1319 uschar name[64];
1320 uschar name2[64];
1321
1322 /* There may be leading spaces; thereafter, we expect an option name starting
1323 with a letter. */
1324
1325 while (isspace(*s)) s++;
1326 if (!isalpha(*s))
1327 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1328
1329 /* Read the name of the option, and skip any subsequent white space. If
1330 it turns out that what we read was "hide", set the flag indicating that
1331 this is a secure option, and loop to read the next word. */
1332
1333 for (n = 0; n < 2; n++)
1334 {
1335 while (isalnum(*s) || *s == '_')
1336 {
1337 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1338 s++;
1339 }
1340 name[ptr] = 0;
1341 while (isspace(*s)) s++;
1342 if (Ustrcmp(name, "hide") != 0) break;
1343 issecure = opt_secure;
1344 ptr = 0;
1345 }
1346
1347 /* Deal with "no_" or "not_" here for booleans */
1348
1349 if (Ustrncmp(name, "no_", 3) == 0)
1350 {
1351 boolvalue = FALSE;
1352 offset = 3;
1353 }
1354
1355 if (Ustrncmp(name, "not_", 4) == 0)
1356 {
1357 boolvalue = FALSE;
1358 offset = 4;
1359 }
1360
1361 /* Search the list for the given name. A non-existent name, or an option that
1362 is set twice, is a disaster. */
1363
1364 ol = find_option(name + offset, oltop, last);
1365
1366 if (ol == NULL)
1367 {
1368 if (unknown_txt == NULL) return FALSE;
1369 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1370 }
1371
1372 if ((ol->type & opt_set) != 0)
1373 {
1374 uschar *mname = name;
1375 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1376 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1377 "\"%s\" option set for the second time", mname);
1378 }
1379
1380 ol->type |= opt_set | issecure;
1381 type = ol->type & opt_mask;
1382
1383 /* Types with data values must be followed by '='; the "no[t]_" prefix
1384 applies only to boolean values. */
1385
1386 if (type < opt_bool || type > opt_bool_last)
1387 {
1388 if (offset != 0)
1389 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1390 "negation prefix applied to a non-boolean option");
1391 if (*s == 0)
1392 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1393 "unexpected end of line (data missing) after %s", name);
1394 if (*s != '=')
1395 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1396 }
1397
1398 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1399 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1400 ultimately expands to one of those values. */
1401
1402 else if (*s != 0 && (offset != 0 || *s != '='))
1403 extra_chars_error(s, US"boolean option ", name, US"");
1404
1405 /* Skip white space after = */
1406
1407 if (*s == '=') while (isspace((*(++s))));
1408
1409 /* If there is a data block and the opt_public flag is not set, change
1410 the data block pointer to the private options block. */
1411
1412 if (data_block != NULL && (ol->type & opt_public) == 0)
1413 data_block = (void *)(((driver_instance *)data_block)->options_block);
1414
1415 /* Now get the data according to the type. */
1416
1417 switch (type)
1418 {
1419 /* If a string value is not enclosed in quotes, it consists of
1420 the rest of the current line, verbatim. Otherwise, string escapes
1421 are processed.
1422
1423 A transport is specified as a string, which is then looked up in the
1424 list of transports. A search type is specified as one of a number of
1425 known strings.
1426
1427 A set or rewrite rules for a driver is specified as a string, which is
1428 then parsed into a suitable chain of control blocks.
1429
1430 Uids and gids are specified as strings which are then looked up in the
1431 passwd file. Lists of uids and gids are similarly specified as colon-
1432 separated strings. */
1433
1434 case opt_stringptr:
1435 case opt_uid:
1436 case opt_gid:
1437 case opt_expand_uid:
1438 case opt_expand_gid:
1439 case opt_uidlist:
1440 case opt_gidlist:
1441 case opt_rewrite:
1442
1443 reset_point = sptr = read_string(s, name);
1444
1445 /* Having read a string, we now have several different ways of using it,
1446 depending on the data type, so do another switch. If keeping the actual
1447 string is not required (because it is interpreted), freesptr is set TRUE,
1448 and at the end we reset the pool. */
1449
1450 switch (type)
1451 {
1452 /* If this was a string, set the variable to point to the new string,
1453 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1454 rules, we still keep the string (for printing), and parse the rules into a
1455 control block and flags word. */
1456
1457 case opt_stringptr:
1458 case opt_rewrite:
1459 if (data_block == NULL)
1460 *((uschar **)(ol->value)) = sptr;
1461 else
1462 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1463 freesptr = FALSE;
1464 if (type == opt_rewrite)
1465 {
1466 int sep = 0;
1467 int *flagptr;
1468 uschar *p = sptr;
1469 rewrite_rule **chain;
1470 optionlist *ol3;
1471
1472 sprintf(CS name2, "*%.50s_rules", name);
1473 ol2 = find_option(name2, oltop, last);
1474 sprintf(CS name2, "*%.50s_flags", name);
1475 ol3 = find_option(name2, oltop, last);
1476
1477 if (ol2 == NULL || ol3 == NULL)
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1479 "rewrite rules not available for driver");
1480
1481 if (data_block == NULL)
1482 {
1483 chain = (rewrite_rule **)(ol2->value);
1484 flagptr = (int *)(ol3->value);
1485 }
1486 else
1487 {
1488 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1489 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1490 }
1491
1492 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1493 != NULL)
1494 {
1495 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1496 *chain = next;
1497 chain = &(next->next);
1498 }
1499
1500 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1501 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1502 "non-header rewrite - not allowed at transport time -");
1503 }
1504 break;
1505
1506 /* If it was an expanded uid, see if there is any expansion to be
1507 done by checking for the presence of a $ character. If there is, save it
1508 in the corresponding *expand_user option field. Otherwise, fall through
1509 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1510 of data. */
1511
1512 case opt_expand_uid:
1513 sprintf(CS name2, "*expand_%.50s", name);
1514 ol2 = find_option(name2, oltop, last);
1515 if (ol2 != NULL)
1516 {
1517 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1518
1519 if (data_block == NULL)
1520 *((uschar **)(ol2->value)) = ss;
1521 else
1522 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1523
1524 if (ss != NULL)
1525 {
1526 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1527 freesptr = FALSE;
1528 break;
1529 }
1530 }
1531
1532 /* Look up a fixed uid, and also make use of the corresponding gid
1533 if a passwd entry is returned and the gid has not been set. */
1534
1535 case opt_uid:
1536 if (!route_finduser(sptr, &pw, &uid))
1537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1538 if (data_block == NULL)
1539 *((uid_t *)(ol->value)) = uid;
1540 else
1541 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1542
1543 /* Set the flag indicating a fixed value is set */
1544
1545 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1546
1547 /* Handle matching gid if we have a passwd entry: done by finding the
1548 same name with terminating "user" changed to "group"; if not found,
1549 ignore. Also ignore if the value is already set. */
1550
1551 if (pw == NULL) break;
1552 Ustrcpy(name+Ustrlen(name)-4, "group");
1553 ol2 = find_option(name, oltop, last);
1554 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1555 (ol2->type & opt_mask) == opt_expand_gid))
1556 {
1557 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1558 if (! *set_flag)
1559 {
1560 if (data_block == NULL)
1561 *((gid_t *)(ol2->value)) = pw->pw_gid;
1562 else
1563 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1564 *set_flag = TRUE;
1565 }
1566 }
1567 break;
1568
1569 /* If it was an expanded gid, see if there is any expansion to be
1570 done by checking for the presence of a $ character. If there is, save it
1571 in the corresponding *expand_user option field. Otherwise, fall through
1572 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1573 of data. */
1574
1575 case opt_expand_gid:
1576 sprintf(CS name2, "*expand_%.50s", name);
1577 ol2 = find_option(name2, oltop, last);
1578 if (ol2 != NULL)
1579 {
1580 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1581
1582 if (data_block == NULL)
1583 *((uschar **)(ol2->value)) = ss;
1584 else
1585 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1586
1587 if (ss != NULL)
1588 {
1589 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1590 freesptr = FALSE;
1591 break;
1592 }
1593 }
1594
1595 /* Handle freestanding gid */
1596
1597 case opt_gid:
1598 if (!route_findgroup(sptr, &gid))
1599 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1600 if (data_block == NULL)
1601 *((gid_t *)(ol->value)) = gid;
1602 else
1603 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1604 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1605 break;
1606
1607 /* If it was a uid list, look up each individual entry, and build
1608 a vector of uids, with a count in the first element. Put the vector
1609 in malloc store so we can free the string. (We are reading into
1610 permanent store already.) */
1611
1612 case opt_uidlist:
1613 {
1614 int count = 1;
1615 uid_t *list;
1616 int ptr = 0;
1617 uschar *p = sptr;
1618
1619 if (*p != 0) count++;
1620 while (*p != 0) if (*p++ == ':') count++;
1621 list = store_malloc(count*sizeof(uid_t));
1622 list[ptr++] = (uid_t)(count - 1);
1623
1624 if (data_block == NULL)
1625 *((uid_t **)(ol->value)) = list;
1626 else
1627 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1628
1629 p = sptr;
1630 while (count-- > 1)
1631 {
1632 int sep = 0;
1633 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1634 if (!route_finduser(big_buffer, NULL, &uid))
1635 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1636 big_buffer);
1637 list[ptr++] = uid;
1638 }
1639 }
1640 break;
1641
1642 /* If it was a gid list, look up each individual entry, and build
1643 a vector of gids, with a count in the first element. Put the vector
1644 in malloc store so we can free the string. (We are reading into permanent
1645 store already.) */
1646
1647 case opt_gidlist:
1648 {
1649 int count = 1;
1650 gid_t *list;
1651 int ptr = 0;
1652 uschar *p = sptr;
1653
1654 if (*p != 0) count++;
1655 while (*p != 0) if (*p++ == ':') count++;
1656 list = store_malloc(count*sizeof(gid_t));
1657 list[ptr++] = (gid_t)(count - 1);
1658
1659 if (data_block == NULL)
1660 *((gid_t **)(ol->value)) = list;
1661 else
1662 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1663
1664 p = sptr;
1665 while (count-- > 1)
1666 {
1667 int sep = 0;
1668 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1669 if (!route_findgroup(big_buffer, &gid))
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1671 big_buffer);
1672 list[ptr++] = gid;
1673 }
1674 }
1675 break;
1676 }
1677
1678 /* Release store if the value of the string doesn't need to be kept. */
1679
1680 if (freesptr) store_reset(reset_point);
1681 break;
1682
1683 /* Expanded boolean: if no characters follow, or if there are no dollar
1684 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1685 save the string for later expansion in the alternate place. */
1686
1687 case opt_expand_bool:
1688 if (*s != 0 && Ustrchr(s, '$') != 0)
1689 {
1690 sprintf(CS name2, "*expand_%.50s", name);
1691 ol2 = find_option(name2, oltop, last);
1692 if (ol2 != NULL)
1693 {
1694 reset_point = sptr = read_string(s, name);
1695 if (data_block == NULL)
1696 *((uschar **)(ol2->value)) = sptr;
1697 else
1698 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1699 freesptr = FALSE;
1700 break;
1701 }
1702 }
1703 /* Fall through */
1704
1705 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1706 look for yes/not/true/false. Some booleans are stored in a single bit in
1707 a single int. There's a special fudge for verify settings; without a suffix
1708 they set both xx_sender and xx_recipient. The table points to the sender
1709 value; search subsequently for the recipient. There's another special case:
1710 opt_bool_set also notes when a boolean has been set. */
1711
1712 case opt_bool:
1713 case opt_bit:
1714 case opt_bool_verify:
1715 case opt_bool_set:
1716 if (*s != 0)
1717 {
1718 s = readconf_readname(name2, 64, s);
1719 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1720 boolvalue = TRUE;
1721 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1722 boolvalue = FALSE;
1723 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1724 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1725 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1726 US"for boolean option ", name);
1727 }
1728
1729 /* Handle single-bit type. */
1730
1731 if (type == opt_bit)
1732 {
1733 int bit = 1 << ((ol->type >> 16) & 31);
1734 int *ptr = (data_block == NULL)?
1735 (int *)(ol->value) :
1736 (int *)((uschar *)data_block + (long int)ol->value);
1737 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1738 break;
1739 }
1740
1741 /* Handle full BOOL types */
1742
1743 if (data_block == NULL)
1744 *((BOOL *)(ol->value)) = boolvalue;
1745 else
1746 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1747
1748 /* Verify fudge */
1749
1750 if (type == opt_bool_verify)
1751 {
1752 sprintf(CS name2, "%.50s_recipient", name + offset);
1753 ol2 = find_option(name2, oltop, last);
1754 if (ol2 != NULL)
1755 {
1756 if (data_block == NULL)
1757 *((BOOL *)(ol2->value)) = boolvalue;
1758 else
1759 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1760 }
1761 }
1762
1763 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1764
1765 else if (type == opt_bool_set)
1766 {
1767 sprintf(CS name2, "*set_%.50s", name + offset);
1768 ol2 = find_option(name2, oltop, last);
1769 if (ol2 != NULL)
1770 {
1771 if (data_block == NULL)
1772 *((BOOL *)(ol2->value)) = TRUE;
1773 else
1774 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1775 }
1776 }
1777 break;
1778
1779 /* Octal integer */
1780
1781 case opt_octint:
1782 intbase = 8;
1783 inttype = US"octal ";
1784
1785 /* Integer: a simple(ish) case; allow octal and hex formats, and
1786 suffixes K and M. The different types affect output, not input. */
1787
1788 case opt_mkint:
1789 case opt_int:
1790 {
1791 uschar *endptr;
1792 errno = 0;
1793 value = strtol(CS s, CSS &endptr, intbase);
1794
1795 if (endptr == s)
1796 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1797 inttype, name);
1798
1799 if (errno != ERANGE)
1800 {
1801 if (tolower(*endptr) == 'k')
1802 {
1803 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1804 else value *= 1024;
1805 endptr++;
1806 }
1807 else if (tolower(*endptr) == 'm')
1808 {
1809 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1810 errno = ERANGE;
1811 else value *= 1024*1024;
1812 endptr++;
1813 }
1814 }
1815
1816 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1817 "absolute value of integer \"%s\" is too large (overflow)", s);
1818
1819 while (isspace(*endptr)) endptr++;
1820 if (*endptr != 0)
1821 extra_chars_error(endptr, inttype, US"integer value for ", name);
1822 }
1823
1824 if (data_block == NULL)
1825 *((int *)(ol->value)) = value;
1826 else
1827 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1828 break;
1829
1830 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1831 M. */
1832
1833 case opt_Kint:
1834 {
1835 uschar *endptr;
1836 errno = 0;
1837 value = strtol(CS s, CSS &endptr, intbase);
1838
1839 if (endptr == s)
1840 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1841 inttype, name);
1842
1843 if (errno != ERANGE)
1844 {
1845 if (tolower(*endptr) == 'm')
1846 {
1847 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1848 else value *= 1024;
1849 endptr++;
1850 }
1851 else if (tolower(*endptr) == 'k')
1852 {
1853 endptr++;
1854 }
1855 else
1856 {
1857 value = (value + 512)/1024;
1858 }
1859 }
1860
1861 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1862 "absolute value of integer \"%s\" is too large (overflow)", s);
1863
1864 while (isspace(*endptr)) endptr++;
1865 if (*endptr != 0)
1866 extra_chars_error(endptr, inttype, US"integer value for ", name);
1867 }
1868
1869 if (data_block == NULL)
1870 *((int *)(ol->value)) = value;
1871 else
1872 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1873 break;
1874
1875 /* Fixed-point number: held to 3 decimal places. */
1876
1877 case opt_fixed:
1878 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1879 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1880 "fixed-point number expected for %s", name);
1881
1882 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1883 "integer \"%s\" is too large (overflow)", s);
1884
1885 value *= 1000;
1886
1887 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1888 "integer \"%s\" is too large (overflow)", s);
1889
1890 if (s[count] == '.')
1891 {
1892 int d = 100;
1893 while (isdigit(s[++count]))
1894 {
1895 value += (s[count] - '0') * d;
1896 d /= 10;
1897 }
1898 }
1899
1900 while (isspace(s[count])) count++;
1901
1902 if (s[count] != 0)
1903 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1904
1905 if (data_block == NULL)
1906 *((int *)(ol->value)) = value;
1907 else
1908 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1909 break;
1910
1911 /* There's a special routine to read time values. */
1912
1913 case opt_time:
1914 value = readconf_readtime(s, 0, FALSE);
1915 if (value < 0)
1916 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1917 name);
1918 if (data_block == NULL)
1919 *((int *)(ol->value)) = value;
1920 else
1921 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1922 break;
1923
1924 /* A time list is a list of colon-separated times, with the first
1925 element holding the size of the list and the second the number of
1926 entries used. */
1927
1928 case opt_timelist:
1929 {
1930 int count = 0;
1931 int *list = (data_block == NULL)?
1932 (int *)(ol->value) :
1933 (int *)((uschar *)data_block + (long int)(ol->value));
1934
1935 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1936 {
1937 int terminator = 0;
1938 uschar *snext = Ustrchr(s, ':');
1939 if (snext != NULL)
1940 {
1941 uschar *ss = snext;
1942 while (ss > s && isspace(ss[-1])) ss--;
1943 terminator = *ss;
1944 }
1945 value = readconf_readtime(s, terminator, FALSE);
1946 if (value < 0)
1947 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1948 name);
1949 if (count > 1 && value <= list[count])
1950 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1951 "time value out of order for %s", name);
1952 list[count+1] = value;
1953 if (snext == NULL) break;
1954 s = snext + 1;
1955 while (isspace(*s)) s++;
1956 }
1957
1958 if (count > list[0] - 2)
1959 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1960 name);
1961 if (count > 0 && list[2] == 0) count = 0;
1962 list[1] = count;
1963 }
1964
1965 break;
1966 }
1967
1968 return TRUE;
1969 }
1970
1971
1972
1973 /*************************************************
1974 * Print a time value *
1975 *************************************************/
1976
1977 /*
1978 Argument: a time value in seconds
1979 Returns: pointer to a fixed buffer containing the time as a string,
1980 in readconf_readtime() format
1981 */
1982
1983 uschar *
1984 readconf_printtime(int t)
1985 {
1986 int s, m, h, d, w;
1987 uschar *p = time_buffer;
1988
1989 s = t % 60;
1990 t /= 60;
1991 m = t % 60;
1992 t /= 60;
1993 h = t % 24;
1994 t /= 24;
1995 d = t % 7;
1996 w = t/7;
1997
1998 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
1999 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2000 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2001 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2002 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2003
2004 return time_buffer;
2005 }
2006
2007
2008
2009 /*************************************************
2010 * Print an individual option value *
2011 *************************************************/
2012
2013 /* This is used by the -bP option, so prints to the standard output.
2014 The entire options list is passed in as an argument, because some options come
2015 in pairs - typically uid/gid settings, which can either be explicit numerical
2016 values, or strings to be expanded later. If the numerical value is unset,
2017 search for "*expand_<name>" to see if there is a string equivalent.
2018
2019 Arguments:
2020 ol option entry, or NULL for an unknown option
2021 name option name
2022 options_block NULL for main configuration options; otherwise points to
2023 a driver block; if the option doesn't have opt_public
2024 set, then options_block->options_block is where the item
2025 resides.
2026 oltop points to the option list in which ol exists
2027 last one more than the offset of the last entry in optop
2028
2029 Returns: nothing
2030 */
2031
2032 static void
2033 print_ol(optionlist *ol, uschar *name, void *options_block,
2034 optionlist *oltop, int last)
2035 {
2036 struct passwd *pw;
2037 struct group *gr;
2038 optionlist *ol2;
2039 void *value;
2040 uid_t *uidlist;
2041 gid_t *gidlist;
2042 uschar *s;
2043 uschar name2[64];
2044
2045 if (ol == NULL)
2046 {
2047 printf("%s is not a known option\n", name);
2048 return;
2049 }
2050
2051 /* Non-admin callers cannot see options that have been flagged secure by the
2052 "hide" prefix. */
2053
2054 if (!admin_user && (ol->type & opt_secure) != 0)
2055 {
2056 printf("%s = <value not displayable>\n", name);
2057 return;
2058 }
2059
2060 /* Else show the value of the option */
2061
2062 value = ol->value;
2063 if (options_block != NULL)
2064 {
2065 if ((ol->type & opt_public) == 0)
2066 options_block = (void *)(((driver_instance *)options_block)->options_block);
2067 value = (void *)((uschar *)options_block + (long int)value);
2068 }
2069
2070 switch(ol->type & opt_mask)
2071 {
2072 case opt_stringptr:
2073 case opt_rewrite: /* Show the text value */
2074 s = *((uschar **)value);
2075 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2076 break;
2077
2078 case opt_int:
2079 printf("%s = %d\n", name, *((int *)value));
2080 break;
2081
2082 case opt_mkint:
2083 {
2084 int x = *((int *)value);
2085 if (x != 0 && (x & 1023) == 0)
2086 {
2087 int c = 'K';
2088 x >>= 10;
2089 if ((x & 1023) == 0)
2090 {
2091 c = 'M';
2092 x >>= 10;
2093 }
2094 printf("%s = %d%c\n", name, x, c);
2095 }
2096 else printf("%s = %d\n", name, x);
2097 }
2098 break;
2099
2100 case opt_Kint:
2101 {
2102 int x = *((int *)value);
2103 if (x == 0) printf("%s = 0\n", name);
2104 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2105 else printf("%s = %dK\n", name, x);
2106 }
2107 break;
2108
2109 case opt_octint:
2110 printf("%s = %#o\n", name, *((int *)value));
2111 break;
2112
2113 /* Can be negative only when "unset", in which case integer */
2114
2115 case opt_fixed:
2116 {
2117 int x = *((int *)value);
2118 int f = x % 1000;
2119 int d = 100;
2120 if (x < 0) printf("%s =\n", name); else
2121 {
2122 printf("%s = %d.", name, x/1000);
2123 do
2124 {
2125 printf("%d", f/d);
2126 f %= d;
2127 d /= 10;
2128 }
2129 while (f != 0);
2130 printf("\n");
2131 }
2132 }
2133 break;
2134
2135 /* If the numerical value is unset, try for the string value */
2136
2137 case opt_expand_uid:
2138 if (! *get_set_flag(name, oltop, last, options_block))
2139 {
2140 sprintf(CS name2, "*expand_%.50s", name);
2141 ol2 = find_option(name2, oltop, last);
2142 if (ol2 != NULL)
2143 {
2144 void *value2 = ol2->value;
2145 if (options_block != NULL)
2146 value2 = (void *)((uschar *)options_block + (long int)value2);
2147 s = *((uschar **)value2);
2148 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2149 break;
2150 }
2151 }
2152
2153 /* Else fall through */
2154
2155 case opt_uid:
2156 if (! *get_set_flag(name, oltop, last, options_block))
2157 printf("%s =\n", name);
2158 else
2159 {
2160 pw = getpwuid(*((uid_t *)value));
2161 if (pw == NULL)
2162 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2163 else printf("%s = %s\n", name, pw->pw_name);
2164 }
2165 break;
2166
2167 /* If the numerical value is unset, try for the string value */
2168
2169 case opt_expand_gid:
2170 if (! *get_set_flag(name, oltop, last, options_block))
2171 {
2172 sprintf(CS name2, "*expand_%.50s", name);
2173 ol2 = find_option(name2, oltop, last);
2174 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2175 {
2176 void *value2 = ol2->value;
2177 if (options_block != NULL)
2178 value2 = (void *)((uschar *)options_block + (long int)value2);
2179 s = *((uschar **)value2);
2180 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2181 break;
2182 }
2183 }
2184
2185 /* Else fall through */
2186
2187 case opt_gid:
2188 if (! *get_set_flag(name, oltop, last, options_block))
2189 printf("%s =\n", name);
2190 else
2191 {
2192 gr = getgrgid(*((int *)value));
2193 if (gr == NULL)
2194 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2195 else printf("%s = %s\n", name, gr->gr_name);
2196 }
2197 break;
2198
2199 case opt_uidlist:
2200 uidlist = *((uid_t **)value);
2201 printf("%s =", name);
2202 if (uidlist != NULL)
2203 {
2204 int i;
2205 uschar sep = ' ';
2206 for (i = 1; i <= (int)(uidlist[0]); i++)
2207 {
2208 uschar *name = NULL;
2209 pw = getpwuid(uidlist[i]);
2210 if (pw != NULL) name = US pw->pw_name;
2211 if (name != NULL) printf("%c%s", sep, name);
2212 else printf("%c%ld", sep, (long int)(uidlist[i]));
2213 sep = ':';
2214 }
2215 }
2216 printf("\n");
2217 break;
2218
2219 case opt_gidlist:
2220 gidlist = *((gid_t **)value);
2221 printf("%s =", name);
2222 if (gidlist != NULL)
2223 {
2224 int i;
2225 uschar sep = ' ';
2226 for (i = 1; i <= (int)(gidlist[0]); i++)
2227 {
2228 uschar *name = NULL;
2229 gr = getgrgid(gidlist[i]);
2230 if (gr != NULL) name = US gr->gr_name;
2231 if (name != NULL) printf("%c%s", sep, name);
2232 else printf("%c%ld", sep, (long int)(gidlist[i]));
2233 sep = ':';
2234 }
2235 }
2236 printf("\n");
2237 break;
2238
2239 case opt_time:
2240 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2241 break;
2242
2243 case opt_timelist:
2244 {
2245 int i;
2246 int *list = (int *)value;
2247 printf("%s = ", name);
2248 for (i = 0; i < list[1]; i++)
2249 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2250 printf("\n");
2251 }
2252 break;
2253
2254 case opt_bit:
2255 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2256 "" : "no_", name);
2257 break;
2258
2259 case opt_expand_bool:
2260 sprintf(CS name2, "*expand_%.50s", name);
2261 ol2 = find_option(name2, oltop, last);
2262 if (ol2 != NULL && ol2->value != NULL)
2263 {
2264 void *value2 = ol2->value;
2265 if (options_block != NULL)
2266 value2 = (void *)((uschar *)options_block + (long int)value2);
2267 s = *((uschar **)value2);
2268 if (s != NULL)
2269 {
2270 printf("%s = %s\n", name, string_printing(s));
2271 break;
2272 }
2273 /* s == NULL => string not set; fall through */
2274 }
2275
2276 /* Fall through */
2277
2278 case opt_bool:
2279 case opt_bool_verify:
2280 case opt_bool_set:
2281 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2282 break;
2283 }
2284 }
2285
2286
2287
2288 /*************************************************
2289 * Print value from main configuration *
2290 *************************************************/
2291
2292 /* This function, called as a result of encountering the -bP option,
2293 causes the value of any main configuration variable to be output if the
2294 second argument is NULL. There are some special values:
2295
2296 all print all main configuration options
2297 configure_file print the name of the configuration file
2298 routers print the routers' configurations
2299 transports print the transports' configuration
2300 authenticators print the authenticators' configuration
2301 router_list print a list of router names
2302 transport_list print a list of transport names
2303 authenticator_list print a list of authentication mechanism names
2304 +name print a named list item
2305 local_scan print the local_scan options
2306
2307 If the second argument is not NULL, it must be one of "router", "transport", or
2308 "authenticator" in which case the first argument identifies the driver whose
2309 options are to be printed.
2310
2311 Arguments:
2312 name option name if type == NULL; else driver name
2313 type NULL or driver type name, as described above
2314
2315 Returns: nothing
2316 */
2317
2318 void
2319 readconf_print(uschar *name, uschar *type)
2320 {
2321 BOOL names_only = FALSE;
2322 optionlist *ol;
2323 optionlist *ol2 = NULL;
2324 driver_instance *d = NULL;
2325 int size = 0;
2326
2327 if (type == NULL)
2328 {
2329 if (*name == '+')
2330 {
2331 int i;
2332 tree_node *t;
2333 BOOL found = FALSE;
2334 static uschar *types[] = { US"address", US"domain", US"host",
2335 US"localpart" };
2336 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2337 &hostlist_anchor, &localpartlist_anchor };
2338
2339 for (i = 0; i < 4; i++)
2340 {
2341 t = tree_search(*(anchors[i]), name+1);
2342 if (t != NULL)
2343 {
2344 found = TRUE;
2345 printf("%slist %s = %s\n", types[i], name+1,
2346 ((namedlist_block *)(t->data.ptr))->string);
2347 }
2348 }
2349
2350 if (!found)
2351 printf("no address, domain, host, or local part list called \"%s\" "
2352 "exists\n", name+1);
2353
2354 return;
2355 }
2356
2357 if (Ustrcmp(name, "configure_file") == 0)
2358 {
2359 printf("%s\n", CS config_main_filename);
2360 return;
2361 }
2362
2363 if (Ustrcmp(name, "all") == 0)
2364 {
2365 for (ol = optionlist_config;
2366 ol < optionlist_config + optionlist_config_size; ol++)
2367 {
2368 if ((ol->type & opt_hidden) == 0)
2369 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2370 }
2371 return;
2372 }
2373
2374 if (Ustrcmp(name, "local_scan") == 0)
2375 {
2376 #ifndef LOCAL_SCAN_HAS_OPTIONS
2377 printf("local_scan() options are not supported\n");
2378 #else
2379 for (ol = local_scan_options;
2380 ol < local_scan_options + local_scan_options_count; ol++)
2381 {
2382 print_ol(ol, US ol->name, NULL, local_scan_options,
2383 local_scan_options_count);
2384 }
2385 #endif
2386 return;
2387 }
2388
2389 if (Ustrcmp(name, "routers") == 0)
2390 {
2391 type = US"router";
2392 name = NULL;
2393 }
2394 else if (Ustrcmp(name, "transports") == 0)
2395 {
2396 type = US"transport";
2397 name = NULL;
2398 }
2399
2400 else if (Ustrcmp(name, "authenticators") == 0)
2401 {
2402 type = US"authenticator";
2403 name = NULL;
2404 }
2405
2406 else if (Ustrcmp(name, "authenticator_list") == 0)
2407 {
2408 type = US"authenticator";
2409 name = NULL;
2410 names_only = TRUE;
2411 }
2412
2413 else if (Ustrcmp(name, "router_list") == 0)
2414 {
2415 type = US"router";
2416 name = NULL;
2417 names_only = TRUE;
2418 }
2419 else if (Ustrcmp(name, "transport_list") == 0)
2420 {
2421 type = US"transport";
2422 name = NULL;
2423 names_only = TRUE;
2424 }
2425 else
2426 {
2427 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2428 name, NULL, optionlist_config, optionlist_config_size);
2429 return;
2430 }
2431 }
2432
2433 /* Handle the options for a router or transport. Skip options that are flagged
2434 as hidden. Some of these are options with names starting with '*', used for
2435 internal alternative representations of other options (which the printing
2436 function will sort out). Others are synonyms kept for backward compatibility.
2437 */
2438
2439 if (Ustrcmp(type, "router") == 0)
2440 {
2441 d = (driver_instance *)routers;
2442 ol2 = optionlist_routers;
2443 size = optionlist_routers_size;
2444 }
2445 else if (Ustrcmp(type, "transport") == 0)
2446 {
2447 d = (driver_instance *)transports;
2448 ol2 = optionlist_transports;
2449 size = optionlist_transports_size;
2450 }
2451 else if (Ustrcmp(type, "authenticator") == 0)
2452 {
2453 d = (driver_instance *)auths;
2454 ol2 = optionlist_auths;
2455 size = optionlist_auths_size;
2456 }
2457
2458 if (names_only)
2459 {
2460 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2461 return;
2462 }
2463
2464 /* Either search for a given driver, or print all of them */
2465
2466 for (; d != NULL; d = d->next)
2467 {
2468 if (name == NULL)
2469 printf("\n%s %s:\n", d->name, type);
2470 else if (Ustrcmp(d->name, name) != 0) continue;
2471
2472 for (ol = ol2; ol < ol2 + size; ol++)
2473 {
2474 if ((ol->type & opt_hidden) == 0)
2475 print_ol(ol, US ol->name, d, ol2, size);
2476 }
2477
2478 for (ol = d->info->options;
2479 ol < d->info->options + *(d->info->options_count); ol++)
2480 {
2481 if ((ol->type & opt_hidden) == 0)
2482 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2483 }
2484 if (name != NULL) return;
2485 }
2486 if (name != NULL) printf("%s %s not found\n", type, name);
2487 }
2488
2489
2490
2491 /*************************************************
2492 * Read a named list item *
2493 *************************************************/
2494
2495 /* This function reads a name and a list (i.e. string). The name is used to
2496 save the list in a tree, sorted by its name. Each entry also has a number,
2497 which can be used for caching tests, but if the string contains any expansion
2498 items other than $key, the number is set negative to inhibit caching. This
2499 mechanism is used for domain, host, and address lists that are referenced by
2500 the "+name" syntax.
2501
2502 Arguments:
2503 anchorp points to the tree anchor
2504 numberp points to the current number for this tree
2505 max the maximum number permitted
2506 s the text of the option line, starting immediately after the name
2507 of the list type
2508 tname the name of the list type, for messages
2509
2510 Returns: nothing
2511 */
2512
2513 static void
2514 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2515 uschar *tname)
2516 {
2517 BOOL forcecache = FALSE;
2518 uschar *ss;
2519 tree_node *t;
2520 namedlist_block *nb = store_get(sizeof(namedlist_block));
2521
2522 if (Ustrncmp(s, "_cache", 6) == 0)
2523 {
2524 forcecache = TRUE;
2525 s += 6;
2526 }
2527
2528 if (!isspace(*s))
2529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2530
2531 if (*numberp >= max)
2532 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2533 tname, max);
2534
2535 while (isspace(*s)) s++;
2536 ss = s;
2537 while (isalnum(*s) || *s == '_') s++;
2538 t = store_get(sizeof(tree_node) + s-ss);
2539 Ustrncpy(t->name, ss, s-ss);
2540 t->name[s-ss] = 0;
2541 while (isspace(*s)) s++;
2542
2543 if (!tree_insertnode(anchorp, t))
2544 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2545 "duplicate name \"%s\" for a named %s", t->name, tname);
2546
2547 t->data.ptr = nb;
2548 nb->number = *numberp;
2549 *numberp += 1;
2550
2551 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2552 "missing '=' after \"%s\"", t->name);
2553 while (isspace(*s)) s++;
2554 nb->string = read_string(s, t->name);
2555 nb->cache_data = NULL;
2556
2557 /* Check the string for any expansions; if any are found, mark this list
2558 uncacheable unless the user has explicited forced caching. */
2559
2560 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2561 }
2562
2563
2564
2565
2566 /*************************************************
2567 * Unpick data for a rate limit *
2568 *************************************************/
2569
2570 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2571 separate values.
2572
2573 Arguments:
2574 s string, in the form t,b,f,l
2575 where t is the threshold (integer)
2576 b is the initial delay (time)
2577 f is the multiplicative factor (fixed point)
2578 k is the maximum time (time)
2579 threshold where to store threshold
2580 base where to store base in milliseconds
2581 factor where to store factor in milliseconds
2582 limit where to store limit
2583
2584 Returns: nothing (panics on error)
2585 */
2586
2587 static void
2588 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2589 int *limit)
2590 {
2591 uschar bstring[16], lstring[16];
2592
2593 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2594 factor, lstring) == 4)
2595 {
2596 *base = readconf_readtime(bstring, 0, TRUE);
2597 *limit = readconf_readtime(lstring, 0, TRUE);
2598 if (*base >= 0 && *limit >= 0) return;
2599 }
2600 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2601 }
2602
2603
2604
2605
2606 /*************************************************
2607 * Read main configuration options *
2608 *************************************************/
2609
2610 /* This function is the first to be called for configuration reading. It
2611 opens the configuration file and reads general configuration settings until
2612 it reaches the end of the configuration section. The file is then left open so
2613 that the remaining configuration data can subsequently be read if needed for
2614 this run of Exim.
2615
2616 The configuration file must be owned either by root or exim, and be writeable
2617 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2618 in the config file, so the test is done on the compiled in values. A slight
2619 anomaly, to be carefully documented.
2620
2621 The name of the configuration file is taken from a list that is included in the
2622 binary of Exim. It can be altered from the command line, but if that is done,
2623 root privilege is immediately withdrawn unless the caller is root or exim.
2624 The first file on the list that exists is used.
2625
2626 For use on multiple systems that share file systems, first look for a
2627 configuration file whose name has the current node name on the end. If that is
2628 not found, try the generic name. For really contorted configurations, that run
2629 multiple Exims with different uid settings, first try adding the effective uid
2630 before the node name. These complications are going to waste resources on most
2631 systems. Therefore they are available only when requested by compile-time
2632 options. */
2633
2634 void
2635 readconf_main(void)
2636 {
2637 int sep = 0;
2638 struct stat statbuf;
2639 uschar *s, *filename;
2640 uschar *list = config_main_filelist;
2641
2642 /* Loop through the possible file names */
2643
2644 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2645 != NULL)
2646 {
2647 /* Cut out all the fancy processing unless specifically wanted */
2648
2649 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2650 uschar *suffix = filename + Ustrlen(filename);
2651
2652 /* Try for the node-specific file if a node name exists */
2653
2654 #ifdef CONFIGURE_FILE_USE_NODE
2655 struct utsname uts;
2656 if (uname(&uts) >= 0)
2657 {
2658 #ifdef CONFIGURE_FILE_USE_EUID
2659 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2660 config_file = Ufopen(filename, "rb");
2661 if (config_file == NULL)
2662 #endif /* CONFIGURE_FILE_USE_EUID */
2663 {
2664 sprintf(CS suffix, ".%.256s", uts.nodename);
2665 config_file = Ufopen(filename, "rb");
2666 }
2667 }
2668 #endif /* CONFIGURE_FILE_USE_NODE */
2669
2670 /* Otherwise, try the generic name, possibly with the euid added */
2671
2672 #ifdef CONFIGURE_FILE_USE_EUID
2673 if (config_file == NULL)
2674 {
2675 sprintf(CS suffix, ".%ld", (long int)original_euid);
2676 config_file = Ufopen(filename, "rb");
2677 }
2678 #endif /* CONFIGURE_FILE_USE_EUID */
2679
2680 /* Finally, try the unadorned name */
2681
2682 if (config_file == NULL)
2683 {
2684 *suffix = 0;
2685 config_file = Ufopen(filename, "rb");
2686 }
2687 #else /* if neither defined */
2688
2689 /* This is the common case when the fancy processing is not included. */
2690
2691 config_file = Ufopen(filename, "rb");
2692 #endif
2693
2694 /* If the file does not exist, continue to try any others. For any other
2695 error, break out (and die). */
2696
2697 if (config_file != NULL || errno != ENOENT) break;
2698 }
2699
2700 /* On success, save the name for verification; config_filename is used when
2701 logging configuration errors (it changes for .included files) whereas
2702 config_main_filename is the name shown by -bP. Failure to open a configuration
2703 file is a serious disaster. */
2704
2705 if (config_file != NULL)
2706 {
2707 config_filename = config_main_filename = string_copy(filename);
2708 }
2709 else
2710 {
2711 if (filename == NULL)
2712 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2713 "%s", config_main_filelist);
2714 else
2715 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2716 "configuration file %s", filename));
2717 }
2718
2719 /* Check the status of the file we have opened, unless it was specified on
2720 the command line, in which case privilege was given away at the start. */
2721
2722 if (!config_changed)
2723 {
2724 if (fstat(fileno(config_file), &statbuf) != 0)
2725 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2726 big_buffer);
2727
2728 if ((statbuf.st_uid != root_uid && /* owner not root */
2729 statbuf.st_uid != exim_uid /* owner not exim */
2730 #ifdef CONFIGURE_OWNER
2731 && statbuf.st_uid != config_uid /* owner not the special one */
2732 #endif
2733 ) || /* or */
2734 (statbuf.st_gid != exim_gid /* group not exim & */
2735 #ifdef CONFIGURE_GROUP
2736 && statbuf.st_gid != config_gid /* group not the special one */
2737 #endif
2738 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2739 /* or */
2740 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2741
2742 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2743 "wrong owner, group, or mode", big_buffer);
2744 }
2745
2746 /* Process the main configuration settings. They all begin with a lower case
2747 letter. If we see something starting with an upper case letter, it is taken as
2748 a macro definition. */
2749
2750 while ((s = get_config_line()) != NULL)
2751 {
2752 if (isupper(s[0])) read_macro_assignment(s);
2753
2754 else if (Ustrncmp(s, "domainlist", 10) == 0)
2755 read_named_list(&domainlist_anchor, &domainlist_count,
2756 MAX_NAMED_LIST, s+10, US"domain list");
2757
2758 else if (Ustrncmp(s, "hostlist", 8) == 0)
2759 read_named_list(&hostlist_anchor, &hostlist_count,
2760 MAX_NAMED_LIST, s+8, US"host list");
2761
2762 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2763 read_named_list(&addresslist_anchor, &addresslist_count,
2764 MAX_NAMED_LIST, s+11, US"address list");
2765
2766 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2767 read_named_list(&localpartlist_anchor, &localpartlist_count,
2768 MAX_NAMED_LIST, s+13, US"local part list");
2769
2770 else
2771 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2772 NULL, US"main option \"%s\" unknown");
2773 }
2774
2775
2776 /* If local_sender_retain is set, local_from_check must be unset. */
2777
2778 if (local_sender_retain && local_from_check)
2779 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2780 "local_sender_retain are set; this combination is not allowed");
2781
2782 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2783 wanted. */
2784
2785 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2786
2787 /* remote_max_parallel must be > 0 */
2788
2789 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2790
2791 /* The primary host name may be required for expansion of spool_directory
2792 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2793 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2794 canonize it. Some people like upper case letters in their host names, so we
2795 don't force the case. */
2796
2797 if (primary_hostname == NULL)
2798 {
2799 uschar *hostname;
2800 struct utsname uts;
2801 if (uname(&uts) < 0)
2802 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2803 hostname = US uts.nodename;
2804
2805 if (Ustrchr(hostname, '.') == NULL)
2806 {
2807 int af = AF_INET;
2808 struct hostent *hostdata;
2809
2810 #if HAVE_IPV6
2811 if (dns_ipv4_lookup == NULL ||
2812 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2813 TRUE, NULL) != OK)
2814 af = AF_INET6;
2815 #else
2816 af = AF_INET;
2817 #endif
2818
2819 for (;;)
2820 {
2821 #if HAVE_IPV6
2822 #if HAVE_GETIPNODEBYNAME
2823 int error_num;
2824 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2825 #else
2826 hostdata = gethostbyname2(CS hostname, af);
2827 #endif
2828 #else
2829 hostdata = gethostbyname(CS hostname);
2830 #endif
2831
2832 if (hostdata != NULL)
2833 {
2834 hostname = US hostdata->h_name;
2835 break;
2836 }
2837
2838 if (af == AF_INET) break;
2839 af = AF_INET;
2840 }
2841 }
2842
2843 primary_hostname = string_copy(hostname);
2844 }
2845
2846 /* Set up default value for smtp_active_hostname */
2847
2848 smtp_active_hostname = primary_hostname;
2849
2850 /* If spool_directory wasn't set in the build-time configuration, it must have
2851 got set above. Of course, writing to the log may not work if log_file_path is
2852 not set, but it will at least get to syslog or somewhere, with any luck. */
2853
2854 if (*spool_directory == 0)
2855 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2856 "proceed");
2857
2858 /* Expand the spool directory name; it may, for example, contain the primary
2859 host name. Same comment about failure. */
2860
2861 s = expand_string(spool_directory);
2862 if (s == NULL)
2863 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2864 "\"%s\": %s", spool_directory, expand_string_message);
2865 spool_directory = s;
2866
2867 /* Expand log_file_path, which must contain "%s" in any component that isn't
2868 the null string or "syslog". It is also allowed to contain one instance of %D.
2869 However, it must NOT contain % followed by anything else. */
2870
2871 if (*log_file_path != 0)
2872 {
2873 uschar *ss, *sss;
2874 int sep = ':'; /* Fixed for log file path */
2875 s = expand_string(log_file_path);
2876 if (s == NULL)
2877 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2878 "\"%s\": %s", log_file_path, expand_string_message);
2879
2880 ss = s;
2881 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2882 {
2883 uschar *t;
2884 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2885 t = Ustrstr(sss, "%s");
2886 if (t == NULL)
2887 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2888 "contain \"%%s\"", sss);
2889 *t = 'X';
2890 t = Ustrchr(sss, '%');
2891 if (t != NULL)
2892 {
2893 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2894 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2895 "unexpected \"%%\" character", s);
2896 }
2897 }
2898
2899 log_file_path = s;
2900 }
2901
2902 /* Interpret syslog_facility into an integer argument for 'ident' param to
2903 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2904 leading "log_". */
2905
2906 if (syslog_facility_str != NULL)
2907 {
2908 int i;
2909 uschar *s = syslog_facility_str;
2910
2911 if ((Ustrlen(syslog_facility_str) >= 4) &&
2912 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2913 s += 4;
2914
2915 for (i = 0; i < syslog_list_size; i++)
2916 {
2917 if (strcmpic(s, syslog_list[i].name) == 0)
2918 {
2919 syslog_facility = syslog_list[i].value;
2920 break;
2921 }
2922 }
2923
2924 if (i >= syslog_list_size)
2925 {
2926 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2927 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2928 }
2929 }
2930
2931 /* Expand pid_file_path */
2932
2933 if (*pid_file_path != 0)
2934 {
2935 s = expand_string(pid_file_path);
2936 if (s == NULL)
2937 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2938 "\"%s\": %s", pid_file_path, expand_string_message);
2939 pid_file_path = s;
2940 }
2941
2942 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2943 message. */
2944
2945 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2946
2947 /* Unpick the SMTP rate limiting options, if set */
2948
2949 if (smtp_ratelimit_mail != NULL)
2950 {
2951 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2952 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2953 }
2954
2955 if (smtp_ratelimit_rcpt != NULL)
2956 {
2957 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
2958 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
2959 }
2960
2961 /* The qualify domains default to the primary host name */
2962
2963 if (qualify_domain_sender == NULL)
2964 qualify_domain_sender = primary_hostname;
2965 if (qualify_domain_recipient == NULL)
2966 qualify_domain_recipient = qualify_domain_sender;
2967
2968 /* Setting system_filter_user in the configuration sets the gid as well if a
2969 name is given, but a numerical value does not. */
2970
2971 if (system_filter_uid_set && !system_filter_gid_set)
2972 {
2973 struct passwd *pw = getpwuid(system_filter_uid);
2974 if (pw == NULL)
2975 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
2976 (long int)system_filter_uid);
2977 system_filter_gid = pw->pw_gid;
2978 system_filter_gid_set = TRUE;
2979 }
2980
2981 /* If the errors_reply_to field is set, check that it is syntactically valid
2982 and ensure it contains a domain. */
2983
2984 if (errors_reply_to != NULL)
2985 {
2986 uschar *errmess;
2987 int start, end, domain;
2988 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
2989 &start, &end, &domain, FALSE);
2990
2991 if (recipient == NULL)
2992 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2993 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
2994
2995 if (domain == 0)
2996 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2997 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
2998 }
2999
3000 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3001 smtp_accept_max must also be set. */
3002
3003 if (smtp_accept_max == 0 &&
3004 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3005 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3006 "smtp_accept_max must be set if smtp_accept_queue or "
3007 "smtp_accept_max_per_host is set");
3008
3009 /* Set up the host number if anything is specified. It is an expanded string
3010 so that it can be computed from the host name, for example. We do this last
3011 so as to ensure that everything else is set up before the expansion. */
3012
3013 if (host_number_string != NULL)
3014 {
3015 uschar *end;
3016 uschar *s = expand_string(host_number_string);
3017 long int n = Ustrtol(s, &end, 0);
3018 while (isspace(*end)) end++;
3019 if (*end != 0)
3020 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3021 "localhost_number value is not a number: %s", s);
3022 if (n > LOCALHOST_MAX)
3023 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3024 "localhost_number is greater than the maximum allowed value (%d)",
3025 LOCALHOST_MAX);
3026 host_number = n;
3027 }
3028
3029 #ifdef SUPPORT_TLS
3030 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3031
3032 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3033 tls_verify_certificates == NULL)
3034 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3035 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3036 (tls_verify_hosts != NULL)? "" : "try_");
3037 #endif
3038 }
3039
3040
3041
3042 /*************************************************
3043 * Initialize one driver *
3044 *************************************************/
3045
3046 /* This is called once the driver's generic options, if any, have been read.
3047 We can now find the driver, set up defaults for the private options, and
3048 unset any "set" bits in the private options table (which might have been
3049 set by another incarnation of the same driver).
3050
3051 Arguments:
3052 d pointer to driver instance block, with generic
3053 options filled in
3054 drivers_available vector of available drivers
3055 size_of_info size of each block in drivers_available
3056 class class of driver, for error message
3057
3058 Returns: pointer to the driver info block
3059 */
3060
3061 static driver_info *
3062 init_driver(driver_instance *d, driver_info *drivers_available,
3063 int size_of_info, uschar *class)
3064 {
3065 driver_info *dd;
3066
3067 for (dd = drivers_available; dd->driver_name[0] != 0;
3068 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3069 {
3070 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3071 {
3072 int i;
3073 int len = dd->options_len;
3074 d->info = dd;
3075 d->options_block = store_get(len);
3076 memcpy(d->options_block, dd->options_block, len);
3077 for (i = 0; i < *(dd->options_count); i++)
3078 dd->options[i].type &= ~opt_set;
3079 return dd;
3080 }
3081 }
3082
3083 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3084 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3085
3086 return NULL; /* never obeyed */
3087 }
3088
3089
3090
3091
3092 /*************************************************
3093 * Initialize driver list *
3094 *************************************************/
3095
3096 /* This function is called for routers, transports, and authentication
3097 mechanisms. It reads the data from the current point in the configuration file
3098 up to the end of the section, and sets up a chain of instance blocks according
3099 to the file's contents. The file will already have been opened by a call to
3100 readconf_main, and must be left open for subsequent reading of further data.
3101
3102 Any errors cause a panic crash. Note that the blocks with names driver_info and
3103 driver_instance must map the first portions of all the _info and _instance
3104 blocks for this shared code to work.
3105
3106 Arguments:
3107 class "router", "transport", or "authenticator"
3108 anchor &routers, &transports, &auths
3109 drivers_available available drivers
3110 size_of_info size of each info block
3111 instance_default points to default data for an instance
3112 instance_size size of instance block
3113 driver_optionlist generic option list
3114 driver_optionlist_count count of generic option list
3115
3116 Returns: nothing
3117 */
3118
3119 void
3120 readconf_driver_init(
3121 uschar *class,
3122 driver_instance **anchor,
3123 driver_info *drivers_available,
3124 int size_of_info,
3125 void *instance_default,
3126 int instance_size,
3127 optionlist *driver_optionlist,
3128 int driver_optionlist_count)
3129 {
3130 driver_instance **p = anchor;
3131 driver_instance *d = NULL;
3132 uschar *buffer;
3133
3134 while ((buffer = get_config_line()) != NULL)
3135 {
3136 uschar name[64];
3137 uschar *s;
3138
3139 /* Read the first name on the line and test for the start of a new driver. A
3140 macro definition indicates the end of the previous driver. If this isn't the
3141 start of a new driver, the line will be re-read. */
3142
3143 s = readconf_readname(name, sizeof(name), buffer);
3144
3145 /* Handle macro definition, first finishing off the initialization of the
3146 previous driver, if any. */
3147
3148 if (isupper(*name) && *s == '=')
3149 {
3150 if (d != NULL)
3151 {
3152 if (d->driver_name == NULL)
3153 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3154 "no driver defined for %s \"%s\"", class, d->name);
3155 (d->info->init)(d);
3156 d = NULL;
3157 }
3158 read_macro_assignment(buffer);
3159 continue;
3160 }
3161
3162 /* If the line starts with a name terminated by a colon, we are at the
3163 start of the definition of a new driver. The rest of the line must be
3164 blank. */
3165
3166 if (*s++ == ':')
3167 {
3168 int i;
3169
3170 /* Finish off initializing the previous driver. */
3171
3172 if (d != NULL)
3173 {
3174 if (d->driver_name == NULL)
3175 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3176 "no driver defined for %s \"%s\"", class, d->name);
3177 (d->info->init)(d);
3178 }
3179
3180 /* Check that we haven't already got a driver of this name */
3181
3182 for (d = *anchor; d != NULL; d = d->next)
3183 if (Ustrcmp(name, d->name) == 0)
3184 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3185 "there are two %ss called \"%s\"", class, name);
3186
3187 /* Set up a new driver instance data block on the chain, with
3188 its default values installed. */
3189
3190 d = store_get(instance_size);
3191 memcpy(d, instance_default, instance_size);
3192 *p = d;
3193 p = &(d->next);
3194 d->name = string_copy(name);
3195
3196 /* Clear out the "set" bits in the generic options */
3197
3198 for (i = 0; i < driver_optionlist_count; i++)
3199 driver_optionlist[i].type &= ~opt_set;
3200
3201 /* Check nothing more on this line, then do the next loop iteration. */
3202
3203 while (isspace(*s)) s++;
3204 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3205 continue;
3206 }
3207
3208 /* Not the start of a new driver. Give an error if we have not set up a
3209 current driver yet. */
3210
3211 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3212 "%s name missing", class);
3213
3214 /* First look to see if this is a generic option; if it is "driver",
3215 initialize the driver. If is it not a generic option, we can look for a
3216 private option provided that the driver has been previously set up. */
3217
3218 if (readconf_handle_option(buffer, driver_optionlist,
3219 driver_optionlist_count, d, NULL))
3220 {
3221 if (d->info == NULL && d->driver_name != NULL)
3222 init_driver(d, drivers_available, size_of_info, class);
3223 }
3224
3225 /* Handle private options - pass the generic block because some may
3226 live therein. A flag with each option indicates if it is in the public
3227 block. */
3228
3229 else if (d->info != NULL)
3230 {
3231 readconf_handle_option(buffer, d->info->options,
3232 *(d->info->options_count), d, US"option \"%s\" unknown");
3233 }
3234
3235 /* The option is not generic and the driver name has not yet been given. */
3236
3237 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3238 "(\"driver\" must be specified before any private options)", name);
3239 }
3240
3241 /* Run the initialization function for the final driver. */
3242
3243 if (d != NULL)
3244 {
3245 if (d->driver_name == NULL)
3246 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3247 "no driver defined for %s \"%s\"", class, d->name);
3248 (d->info->init)(d);
3249 }
3250 }
3251
3252
3253
3254 /*************************************************
3255 * Check driver dependency *
3256 *************************************************/
3257
3258 /* This function is passed a driver instance and a string. It checks whether
3259 any of the string options for the driver contains the given string as an
3260 expansion variable.
3261
3262 Arguments:
3263 d points to a driver instance block
3264 s the string to search for
3265
3266 Returns: TRUE if a dependency is found
3267 */
3268
3269 BOOL
3270 readconf_depends(driver_instance *d, uschar *s)
3271 {
3272 int count = *(d->info->options_count);
3273 optionlist *ol;
3274 uschar *ss;
3275
3276 for (ol = d->info->options; ol < d->info->options + count; ol++)
3277 {
3278 void *options_block;
3279 uschar *value;
3280 int type = ol->type & opt_mask;
3281 if (type != opt_stringptr) continue;
3282 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3283 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3284 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3285 {
3286 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3287 isalnum(ss[Ustrlen(s)])) continue;
3288 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3289 d->name, ol->name, s);
3290 return TRUE;
3291 }
3292 }
3293
3294 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3295 return FALSE;
3296 }
3297
3298
3299
3300
3301 /*************************************************
3302 * Decode an error type for retries *
3303 *************************************************/
3304
3305 /* This function is global because it is also called from the main
3306 program when testing retry information. It decodes strings such as "quota_7d"
3307 into numerical error codes.
3308
3309 Arguments:
3310 pp points to start of text
3311 p points past end of text
3312 basic_errno points to an int to receive the main error number
3313 more_errno points to an int to receive the secondary error data
3314
3315 Returns: NULL if decoded correctly; else points to error text
3316 */
3317
3318 uschar *
3319 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3320 {
3321 int len;
3322 uschar *q = pp;
3323 while (q < p && *q != '_') q++;
3324 len = q - pp;
3325
3326 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3327 {
3328 *basic_errno = ERRNO_EXIMQUOTA;
3329 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3330 return US"bad time value";
3331 }
3332
3333 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3334 {
3335 *basic_errno = ECONNREFUSED;
3336 if (q != p)
3337 {
3338 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3339 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3340 else return US"A or MX expected after \"refused\"";
3341 }
3342 }
3343
3344 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3345 {
3346 *basic_errno = ETIMEDOUT;
3347 if (q != p)
3348 {
3349 int i;
3350 int xlen = p - q - 1;
3351 uschar *x = q + 1;
3352
3353 static uschar *extras[] =
3354 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3355 static int values[] =
3356 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3357
3358 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3359 {
3360 if (strncmpic(x, extras[i], xlen) == 0)
3361 {
3362 *more_errno = values[i];
3363 break;
3364 }
3365 }
3366
3367 if (i >= sizeof(extras)/sizeof(uschar *))
3368 {
3369 if (strncmpic(x, US"DNS", xlen) == 0)
3370 {
3371 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3372 "available in retry rules (it has never worked) - treated as "
3373 "\"timeout\"");
3374 }
3375 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3376 }
3377 }
3378 }
3379
3380 else if (strncmpic(pp, US"rcpt_4", 6) == 0)
3381 {
3382 BOOL bad = FALSE;
3383 int x = 255; /* means "any 4xx code" */
3384 if (p != pp + 8) bad = TRUE; else
3385 {
3386 int a = pp[6], b = pp[7];
3387 if (isdigit(a))
3388 {
3389 x = (a - '0') * 10;
3390 if (isdigit(b)) x += b - '0';
3391 else if (b == 'x') x += 100;
3392 else bad = TRUE;
3393 }
3394 else if (a != 'x' || b != 'x') bad = TRUE;
3395 }
3396
3397 if (bad) return US"rcpt_4 must be followed by xx, dx, or dd, where "
3398 "x is literal and d is any digit";
3399
3400 *basic_errno = ERRNO_RCPT4XX;
3401 *more_errno = x << 8;
3402 }
3403
3404 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3405 strncmpic(q+1, US"failed", p-q-1) == 0)
3406 {
3407 *basic_errno = ERRNO_AUTHFAIL;
3408 }
3409
3410 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3411 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3412
3413 return NULL;
3414 }
3415
3416
3417
3418
3419 /*************************************************
3420 * Read retry information *
3421 *************************************************/
3422
3423 /* Each line of retry information contains:
3424
3425 . A domain name pattern or an address pattern;
3426
3427 . An error name, possibly with additional data, or *;
3428
3429 . An optional sequence of retry items, each consisting of an identifying
3430 letter, a cutoff time, and optional parameters.
3431
3432 All this is decoded and placed into a control block. */
3433
3434
3435 /* Subroutine to read an argument, preceded by a comma and terminated
3436 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3437 1 = fixed point number (returned *1000).
3438
3439 Arguments:
3440 paddr pointer to pointer to current character; updated
3441 type 0 => read a time; 1 => read a fixed point number
3442
3443 Returns: time in seconds or fixed point number * 1000
3444 */
3445
3446 static int
3447 retry_arg(uschar **paddr, int type)
3448 {
3449 uschar *p = *paddr;
3450 uschar *pp;
3451
3452 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3453
3454 while (isspace(*p)) p++;
3455 pp = p;
3456 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3457
3458 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3459 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3460
3461 *paddr = p;
3462 switch (type)
3463 {
3464 case 0:
3465 return readconf_readtime(pp, *p, FALSE);
3466 case 1:
3467 return readconf_readfixed(pp, *p);
3468 }
3469 return 0; /* Keep picky compilers happy */
3470 }
3471
3472 /* The function proper */
3473
3474 void
3475 readconf_retries(void)
3476 {
3477 retry_config **chain = &retries;
3478 retry_config *next;
3479 uschar *p;
3480
3481 while ((p = get_config_line()) != NULL)
3482 {
3483 retry_rule **rchain;
3484 uschar *pp, *error;
3485
3486 next = store_get(sizeof(retry_config));
3487 next->next = NULL;
3488 *chain = next;
3489 chain = &(next->next);
3490 next->basic_errno = next->more_errno = 0;
3491 next->senders = NULL;
3492 next->rules = NULL;
3493 rchain = &(next->rules);
3494
3495 next->pattern = string_dequote(&p);
3496 while (isspace(*p)) p++;
3497 pp = p;
3498 while (mac_isgraph(*p)) p++;
3499 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3500 "missing error type");
3501
3502 /* Test error names for things we understand. */
3503
3504 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3505 &(next->more_errno))) != NULL)
3506 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3507
3508 /* There may be an optional address list of senders to be used as another
3509 constraint on the rule. This was added later, so the syntax is a bit of a
3510 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3511 an address list. */
3512
3513 while (isspace(*p)) p++;
3514 if (Ustrncmp(p, "senders", 7) == 0)
3515 {
3516 p += 7;
3517 while (isspace(*p)) p++;
3518 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3519 "\"=\" expected after \"senders\" in retry rule");
3520 while (isspace(*p)) p++;
3521 next->senders = string_dequote(&p);
3522 }
3523
3524 /* Now the retry rules. Keep the maximum timeout encountered. */
3525
3526 while (isspace(*p)) p++;
3527
3528 while (*p != 0)
3529 {
3530 retry_rule *rule = store_get(sizeof(retry_rule));
3531 *rchain = rule;
3532 rchain = &(rule->next);
3533 rule->next = NULL;
3534 rule->rule = toupper(*p++);
3535 rule->timeout = retry_arg(&p, 0);
3536 if (rule->timeout > retry_maximum_timeout)
3537 retry_maximum_timeout = rule->timeout;
3538
3539 switch (rule->rule)
3540 {
3541 case 'F': /* Fixed interval */
3542 rule->p1 = retry_arg(&p, 0);
3543 break;
3544
3545 case 'G': /* Geometrically increasing intervals */
3546 rule->p1 = retry_arg(&p, 0);
3547 rule->p2 = retry_arg(&p, 1);
3548 break;
3549
3550 default:
3551 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3552 break;
3553 }
3554
3555 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3556 (rule->rule == 'G' && rule->p2 < 1000))
3557 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3558 "bad parameters for retry rule");
3559
3560 while (isspace(*p)) p++;
3561 if (*p == ';')
3562 {
3563 p++;
3564 while (isspace(*p)) p++;
3565 }
3566 else if (*p != 0)
3567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3568 }
3569 }
3570 }
3571
3572
3573
3574 /*************************************************
3575 * Initialize authenticators *
3576 *************************************************/
3577
3578 /* Read the authenticators section of the configuration file.
3579
3580 Arguments: none
3581 Returns: nothing
3582 */
3583
3584 static void
3585 auths_init(void)
3586 {
3587 auth_instance *au, *bu;
3588 readconf_driver_init(US"authenticator",
3589 (driver_instance **)(&auths), /* chain anchor */
3590 (driver_info *)auths_available, /* available drivers */
3591 sizeof(auth_info), /* size of info block */
3592 &auth_defaults, /* default values for generic options */
3593 sizeof(auth_instance), /* size of instance block */
3594 optionlist_auths, /* generic options */
3595 optionlist_auths_size);
3596
3597 for (au = auths; au != NULL; au = au->next)
3598 {
3599 if (au->public_name == NULL)
3600 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3601 "the %s authenticator", au->name);
3602 for (bu = au->next; bu != NULL; bu = bu->next)
3603 {
3604 if (strcmpic(au->public_name, bu->public_name) == 0)
3605 {
3606 if ((au->client && bu->client) || (au->server && bu->server))
3607 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3608 "(%s and %s) have the same public name (%s)",
3609 (au->client)? US"client" : US"server", au->name, bu->name,
3610 au->public_name);
3611 }
3612 }
3613 }
3614 }
3615
3616
3617
3618
3619 /*************************************************
3620 * Read ACL information *
3621 *************************************************/
3622
3623 /* If this run of Exim is not doing something that involves receiving a
3624 message, we can just skip over the ACL information. No need to parse it.
3625
3626 First, we have a function for acl_read() to call back to get the next line. We
3627 need to remember the line we passed, because at the end it will contain the
3628 name of the next ACL. */
3629
3630 static uschar *acl_line;
3631
3632 static uschar *
3633 acl_callback(void)
3634 {
3635 acl_line = get_config_line();
3636 return acl_line;
3637 }
3638
3639
3640 /* Now the main function:
3641
3642 Arguments:
3643 skip TRUE when this Exim process is doing something that will
3644 not need the ACL data
3645
3646 Returns: nothing
3647 */
3648
3649 static void
3650 readconf_acl(BOOL skip)
3651 {
3652 uschar *p;
3653
3654 /* Not receiving messages, don't need to parse the ACL data */
3655
3656 if (skip)
3657 {
3658 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3659 while ((p = get_config_line()) != NULL);
3660 return;
3661 }
3662
3663 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3664 between ACLs. */
3665
3666 acl_line = get_config_line();
3667
3668 while(acl_line != NULL)
3669 {
3670 uschar name[64];
3671 tree_node *node;
3672 uschar *error;
3673
3674 p = readconf_readname(name, sizeof(name), acl_line);
3675 if (isupper(*name) && *p == '=')
3676 {
3677 read_macro_assignment(acl_line);
3678 acl_line = get_config_line();
3679 continue;
3680 }
3681
3682 if (*p != ':' || name[0] == 0)
3683 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3684
3685 node = store_get(sizeof(tree_node) + Ustrlen(name));
3686 Ustrcpy(node->name, name);
3687 if (!tree_insertnode(&acl_anchor, node))
3688 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3689 "there are two ACLs called \"%s\"", name);
3690
3691 node->data.ptr = acl_read(acl_callback, &error);
3692
3693 if (node->data.ptr == NULL && error != NULL)
3694 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3695 }
3696 }
3697
3698
3699
3700 /*************************************************
3701 * Read configuration for local_scan() *
3702 *************************************************/
3703
3704 /* This function is called after "begin local_scan" is encountered in the
3705 configuration file. If the local_scan() function allows for configuration
3706 options, we can process them. Otherwise, we expire in a panic.
3707
3708 Arguments: none
3709 Returns: nothing
3710 */
3711
3712 static void
3713 local_scan_init(void)
3714 {
3715 #ifndef LOCAL_SCAN_HAS_OPTIONS
3716 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3717 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3718 #else
3719
3720 uschar *p;
3721 while ((p = get_config_line()) != NULL)
3722 {
3723 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3724 NULL, US"local_scan option \"%s\" unknown");
3725 }
3726 #endif
3727 }
3728
3729
3730
3731 /*************************************************
3732 * Read rest of configuration (after main) *
3733 *************************************************/
3734
3735 /* This function reads the rest of the runtime configuration, after the main
3736 configuration. It is called only when actually needed. Each subsequent section
3737 of the configuration starts with a line of the form
3738
3739 begin name
3740
3741 where the name is "routers", "transports", etc. A section is terminated by
3742 hitting the next "begin" line, and the next name is left in next_section.
3743 Because it may confuse people as to whether the names are singular or plural,
3744 we add "s" if it's missing. There is always enough room in next_section for
3745 this. This function is basically just a switch.
3746
3747 Arguments:
3748 skip_acl TRUE if ACL information is not needed
3749
3750 Returns: nothing
3751 */
3752
3753 static uschar *section_list[] = {
3754 US"acls",
3755 US"authenticators",
3756 US"local_scans",
3757 US"retrys",
3758 US"rewrites",
3759 US"routers",
3760 US"transports"};
3761
3762 void
3763 readconf_rest(BOOL skip_acl)
3764 {
3765 int had = 0;
3766
3767 while(next_section[0] != 0)
3768 {
3769 int bit;
3770 int first = 0;
3771 int last = sizeof(section_list) / sizeof(uschar *);
3772 int mid = last/2;
3773 int n = Ustrlen(next_section);
3774
3775 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3776
3777 for (;;)
3778 {
3779 int c = strcmpic(next_section, section_list[mid]);
3780 if (c == 0) break;
3781 if (c > 0) first = mid + 1; else last = mid;
3782 if (first >= last)
3783 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3784 "\"%.*s\" is not a known configuration section name", n, next_section);
3785 mid = (last + first)/2;
3786 }
3787
3788 bit = 1 << mid;
3789 if (((had ^= bit) & bit) == 0)
3790 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3791 "\"%.*s\" section is repeated in the configuration file", n,
3792 next_section);
3793
3794 switch(mid)
3795 {
3796 case 0: readconf_acl(skip_acl); break;
3797 case 1: auths_init(); break;
3798 case 2: local_scan_init(); break;
3799 case 3: readconf_retries(); break;
3800 case 4: readconf_rewrites(); break;
3801 case 5: route_init(); break;
3802 case 6: transport_init(); break;
3803 }
3804 }
3805
3806 fclose(config_file);
3807 }
3808
3809 /* End of readconf.c */
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