Add new errors mail_4xx, data_4xx, lost_connection, tls_required.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.22 2006/03/09 15:10:16 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10 /* Functions for reading the configuration file, and for displaying
11 overall configuration values. Thanks to Brian Candler for the original
12 implementation of the conditional .ifdef etc. */
13
14 #include "exim.h"
15
16 #define CSTATE_STACK_SIZE 10
17
18
19 /* Structure for chain (stack) of .included files */
20
21 typedef struct config_file_item {
22 struct config_file_item *next;
23 uschar *filename;
24 FILE *file;
25 int lineno;
26 } config_file_item;
27
28 /* Structure of table of conditional words and their state transitions */
29
30 typedef struct cond_item {
31 uschar *name;
32 int namelen;
33 int action1;
34 int action2;
35 int pushpop;
36 } cond_item;
37
38 /* Structure of table of syslog facility names and values */
39
40 typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43 } syslog_fac_item;
44
45
46 /* Static variables */
47
48 static config_file_item *config_file_stack = NULL; /* For includes */
49
50 static uschar *syslog_facility_str = NULL;
51 static uschar next_section[24];
52 static uschar time_buffer[24];
53
54 /* State variables for conditional loading (.ifdef / .else / .endif) */
55
56 static int cstate = 0;
57 static int cstate_stack_ptr = -1;
58 static int cstate_stack[CSTATE_STACK_SIZE];
59
60 /* Table of state transitions for handling conditional inclusions. There are
61 four possible state transitions:
62
63 .ifdef true
64 .ifdef false
65 .elifdef true (or .else)
66 .elifdef false
67
68 .endif just causes the previous cstate to be popped off the stack */
69
70 static int next_cstate[3][4] =
71 {
72 /* State 0: reading from file, or reading until next .else or .endif */
73 { 0, 1, 2, 2 },
74 /* State 1: condition failed, skipping until next .else or .endif */
75 { 2, 2, 0, 1 },
76 /* State 2: skipping until .endif */
77 { 2, 2, 2, 2 },
78 };
79
80 /* Table of conditionals and the states to set. For each name, there are four
81 values: the length of the name (to save computing it each time), the state to
82 set if a macro was found in the line, the state to set if a macro was not found
83 in the line, and a stack manipulation setting which is:
84
85 -1 pull state value off the stack
86 0 don't alter the stack
87 +1 push value onto stack, before setting new state
88 */
89
90 static cond_item cond_list[] = {
91 { US"ifdef", 5, 0, 1, 1 },
92 { US"ifndef", 6, 1, 0, 1 },
93 { US"elifdef", 7, 2, 3, 0 },
94 { US"elifndef", 8, 3, 2, 0 },
95 { US"else", 4, 2, 2, 0 },
96 { US"endif", 5, 0, 0, -1 }
97 };
98
99 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101 /* Table of syslog facility names and their values */
102
103 static syslog_fac_item syslog_list[] = {
104 { US"mail", LOG_MAIL },
105 { US"user", LOG_USER },
106 { US"news", LOG_NEWS },
107 { US"uucp", LOG_UUCP },
108 { US"local0", LOG_LOCAL0 },
109 { US"local1", LOG_LOCAL1 },
110 { US"local2", LOG_LOCAL2 },
111 { US"local3", LOG_LOCAL3 },
112 { US"local4", LOG_LOCAL4 },
113 { US"local5", LOG_LOCAL5 },
114 { US"local6", LOG_LOCAL6 },
115 { US"local7", LOG_LOCAL7 },
116 { US"daemon", LOG_DAEMON }
117 };
118
119 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
120
121
122
123
124 /*************************************************
125 * Main configuration options *
126 *************************************************/
127
128 /* The list of options that can be set in the main configuration file. This
129 must be in alphabetic order because it is searched by binary chop. */
130
131 static optionlist optionlist_config[] = {
132 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
133 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
134 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
135 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
136 { "accept_8bitmime", opt_bool, &accept_8bitmime },
137 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
138 #ifdef WITH_CONTENT_SCAN
139 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
140 #endif
141 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
142 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
143 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
144 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
145 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
146 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
147 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
148 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
149 #ifdef WITH_CONTENT_SCAN
150 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
151 #endif
152 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
153 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
154 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
155 #ifdef SUPPORT_TLS
156 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
157 #endif
158 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
159 { "admin_groups", opt_gidlist, &admin_groups },
160 { "allow_domain_literals", opt_bool, &allow_domain_literals },
161 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
162 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
163 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
164 { "auto_thaw", opt_time, &auto_thaw },
165 #ifdef WITH_CONTENT_SCAN
166 { "av_scanner", opt_stringptr, &av_scanner },
167 #endif
168 { "bi_command", opt_stringptr, &bi_command },
169 #ifdef EXPERIMENTAL_BRIGHTMAIL
170 { "bmi_config_file", opt_stringptr, &bmi_config_file },
171 #endif
172 { "bounce_message_file", opt_stringptr, &bounce_message_file },
173 { "bounce_message_text", opt_stringptr, &bounce_message_text },
174 { "bounce_return_body", opt_bool, &bounce_return_body },
175 { "bounce_return_message", opt_bool, &bounce_return_message },
176 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
177 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
178 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
179 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
180 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
181 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
182 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
183 { "check_log_inodes", opt_int, &check_log_inodes },
184 { "check_log_space", opt_Kint, &check_log_space },
185 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
186 { "check_spool_inodes", opt_int, &check_spool_inodes },
187 { "check_spool_space", opt_Kint, &check_spool_space },
188 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
189 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
190 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
191 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
192 { "delay_warning", opt_timelist, &delay_warning },
193 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
194 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
195 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
196 { "delivery_date_remove", opt_bool, &delivery_date_remove },
197 { "disable_ipv6", opt_bool, &disable_ipv6 },
198 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
199 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
200 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
201 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
202 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
203 { "dns_retrans", opt_time, &dns_retrans },
204 { "dns_retry", opt_int, &dns_retry },
205 /* This option is now a no-op, retained for compability */
206 { "drop_cr", opt_bool, &drop_cr },
207 /*********************************************************/
208 { "envelope_to_remove", opt_bool, &envelope_to_remove },
209 { "errors_copy", opt_stringptr, &errors_copy },
210 { "errors_reply_to", opt_stringptr, &errors_reply_to },
211 { "exim_group", opt_gid, &exim_gid },
212 { "exim_path", opt_stringptr, &exim_path },
213 { "exim_user", opt_uid, &exim_uid },
214 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
215 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
216 { "finduser_retries", opt_int, &finduser_retries },
217 { "freeze_tell", opt_stringptr, &freeze_tell },
218 { "gecos_name", opt_stringptr, &gecos_name },
219 { "gecos_pattern", opt_stringptr, &gecos_pattern },
220 { "header_line_maxsize", opt_int, &header_line_maxsize },
221 { "header_maxsize", opt_int, &header_maxsize },
222 { "headers_charset", opt_stringptr, &headers_charset },
223 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
224 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
225 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
226 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
227 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
228 { "hold_domains", opt_stringptr, &hold_domains },
229 { "host_lookup", opt_stringptr, &host_lookup },
230 { "host_lookup_order", opt_stringptr, &host_lookup_order },
231 { "host_reject_connection", opt_stringptr, &host_reject_connection },
232 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
233 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
234 #ifdef LOOKUP_IBASE
235 { "ibase_servers", opt_stringptr, &ibase_servers },
236 #endif
237 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
238 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
239 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
240 { "keep_malformed", opt_time, &keep_malformed },
241 #ifdef LOOKUP_LDAP
242 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
243 { "ldap_version", opt_int, &eldap_version },
244 #endif
245 { "local_from_check", opt_bool, &local_from_check },
246 { "local_from_prefix", opt_stringptr, &local_from_prefix },
247 { "local_from_suffix", opt_stringptr, &local_from_suffix },
248 { "local_interfaces", opt_stringptr, &local_interfaces },
249 { "local_scan_timeout", opt_time, &local_scan_timeout },
250 { "local_sender_retain", opt_bool, &local_sender_retain },
251 { "localhost_number", opt_stringptr, &host_number_string },
252 { "log_file_path", opt_stringptr, &log_file_path },
253 { "log_selector", opt_stringptr, &log_selector_string },
254 { "log_timezone", opt_bool, &log_timezone },
255 { "lookup_open_max", opt_int, &lookup_open_max },
256 { "max_username_length", opt_int, &max_username_length },
257 { "message_body_visible", opt_mkint, &message_body_visible },
258 { "message_id_header_domain", opt_stringptr, &message_id_domain },
259 { "message_id_header_text", opt_stringptr, &message_id_text },
260 { "message_logs", opt_bool, &message_logs },
261 { "message_size_limit", opt_stringptr, &message_size_limit },
262 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
263 { "move_frozen_messages", opt_bool, &move_frozen_messages },
264 #endif
265 { "mua_wrapper", opt_bool, &mua_wrapper },
266 #ifdef LOOKUP_MYSQL
267 { "mysql_servers", opt_stringptr, &mysql_servers },
268 #endif
269 { "never_users", opt_uidlist, &never_users },
270 #ifdef LOOKUP_ORACLE
271 { "oracle_servers", opt_stringptr, &oracle_servers },
272 #endif
273 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
274 #ifdef EXIM_PERL
275 { "perl_at_start", opt_bool, &opt_perl_at_start },
276 { "perl_startup", opt_stringptr, &opt_perl_startup },
277 #endif
278 #ifdef LOOKUP_PGSQL
279 { "pgsql_servers", opt_stringptr, &pgsql_servers },
280 #endif
281 { "pid_file_path", opt_stringptr, &pid_file_path },
282 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
283 { "preserve_message_logs", opt_bool, &preserve_message_logs },
284 { "primary_hostname", opt_stringptr, &primary_hostname },
285 { "print_topbitchars", opt_bool, &print_topbitchars },
286 { "process_log_path", opt_stringptr, &process_log_path },
287 { "prod_requires_admin", opt_bool, &prod_requires_admin },
288 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
289 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
290 { "queue_domains", opt_stringptr, &queue_domains },
291 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
292 { "queue_only", opt_bool, &queue_only },
293 { "queue_only_file", opt_stringptr, &queue_only_file },
294 { "queue_only_load", opt_fixed, &queue_only_load },
295 { "queue_only_override", opt_bool, &queue_only_override },
296 { "queue_run_in_order", opt_bool, &queue_run_in_order },
297 { "queue_run_max", opt_int, &queue_run_max },
298 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
299 { "receive_timeout", opt_time, &receive_timeout },
300 { "received_header_text", opt_stringptr, &received_header_text },
301 { "received_headers_max", opt_int, &received_headers_max },
302 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
303 { "recipients_max", opt_int, &recipients_max },
304 { "recipients_max_reject", opt_bool, &recipients_max_reject },
305 { "remote_max_parallel", opt_int, &remote_max_parallel },
306 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
307 { "retry_data_expire", opt_time, &retry_data_expire },
308 { "retry_interval_max", opt_time, &retry_interval_max },
309 { "return_path_remove", opt_bool, &return_path_remove },
310 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
311 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
312 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
313 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
314 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
315 { "smtp_accept_max", opt_int, &smtp_accept_max },
316 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
317 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
318 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
319 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
320 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
321 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
322 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
323 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
324 { "smtp_banner", opt_stringptr, &smtp_banner },
325 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
326 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
327 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
328 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
329 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
330 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
331 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
332 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
333 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
334 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
335 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
336 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
337 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
338 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
339 #ifdef WITH_CONTENT_SCAN
340 { "spamd_address", opt_stringptr, &spamd_address },
341 #endif
342 { "split_spool_directory", opt_bool, &split_spool_directory },
343 { "spool_directory", opt_stringptr, &spool_directory },
344 #ifdef LOOKUP_SQLITE
345 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
346 #endif
347 #ifdef EXPERIMENTAL_SRS
348 { "srs_config", opt_stringptr, &srs_config },
349 { "srs_hashlength", opt_int, &srs_hashlength },
350 { "srs_hashmin", opt_int, &srs_hashmin },
351 { "srs_maxage", opt_int, &srs_maxage },
352 { "srs_secrets", opt_stringptr, &srs_secrets },
353 { "srs_usehash", opt_bool, &srs_usehash },
354 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
355 #endif
356 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
357 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
358 { "syslog_duplication", opt_bool, &syslog_duplication },
359 { "syslog_facility", opt_stringptr, &syslog_facility_str },
360 { "syslog_processname", opt_stringptr, &syslog_processname },
361 { "syslog_timestamp", opt_bool, &syslog_timestamp },
362 { "system_filter", opt_stringptr, &system_filter },
363 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
364 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
365 { "system_filter_group", opt_gid, &system_filter_gid },
366 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
367 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
368 { "system_filter_user", opt_uid, &system_filter_uid },
369 { "tcp_nodelay", opt_bool, &tcp_nodelay },
370 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
371 { "timezone", opt_stringptr, &timezone_string },
372 #ifdef SUPPORT_TLS
373 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
374 { "tls_certificate", opt_stringptr, &tls_certificate },
375 { "tls_crl", opt_stringptr, &tls_crl },
376 { "tls_dhparam", opt_stringptr, &tls_dhparam },
377 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
378 { "tls_privatekey", opt_stringptr, &tls_privatekey },
379 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
380 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
381 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
382 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
383 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
384 #endif
385 { "trusted_groups", opt_gidlist, &trusted_groups },
386 { "trusted_users", opt_uidlist, &trusted_users },
387 { "unknown_login", opt_stringptr, &unknown_login },
388 { "unknown_username", opt_stringptr, &unknown_username },
389 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
390 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
391 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
392 { "warn_message_file", opt_stringptr, &warn_message_file },
393 { "write_rejectlog", opt_bool, &write_rejectlog }
394 };
395
396 static int optionlist_config_size =
397 sizeof(optionlist_config)/sizeof(optionlist);
398
399
400
401 /*************************************************
402 * Find the name of an option *
403 *************************************************/
404
405 /* This function is to aid debugging. Various functions take arguments that are
406 pointer variables in the options table or in option tables for various drivers.
407 For debugging output, it is useful to be able to find the name of the option
408 which is currently being processed. This function finds it, if it exists, by
409 searching the table(s).
410
411 Arguments: a value that is presumed to be in the table above
412 Returns: the option name, or an empty string
413 */
414
415 uschar *
416 readconf_find_option(void *p)
417 {
418 int i;
419 router_instance *r;
420 transport_instance *t;
421
422 for (i = 0; i < optionlist_config_size; i++)
423 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
424
425 for (r = routers; r != NULL; r = r->next)
426 {
427 router_info *ri = r->info;
428 for (i = 0; i < ri->options_count[0]; i++)
429 {
430 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
431 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
432 return US ri->options[i].name;
433 }
434 }
435
436 for (t = transports; t != NULL; t = t->next)
437 {
438 transport_info *ti = t->info;
439 for (i = 0; i < ti->options_count[0]; i++)
440 {
441 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
442 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
443 return US ti->options[i].name;
444 }
445 }
446
447 return US"";
448 }
449
450
451
452
453 /*************************************************
454 * Deal with an assignment to a macro *
455 *************************************************/
456
457 /* This function is called when a line that starts with an upper case letter is
458 encountered. The argument "line" should contain a complete logical line, and
459 start with the first letter of the macro name. The macro name and the
460 replacement text are extracted and stored. Redefinition of existing,
461 non-command line, macros is permitted using '==' instead of '='.
462
463 Arguments:
464 s points to the start of the logical line
465
466 Returns: nothing
467 */
468
469 static void
470 read_macro_assignment(uschar *s)
471 {
472 uschar name[64];
473 int namelen = 0;
474 BOOL redef = FALSE;
475 macro_item *m;
476 macro_item *mlast = NULL;
477
478 while (isalnum(*s) || *s == '_')
479 {
480 if (namelen >= sizeof(name) - 1)
481 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
482 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
483 name[namelen++] = *s++;
484 }
485 name[namelen] = 0;
486
487 while (isspace(*s)) s++;
488 if (*s++ != '=')
489 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
490
491 if (*s == '=')
492 {
493 redef = TRUE;
494 s++;
495 }
496 while (isspace(*s)) s++;
497
498 /* If an existing macro of the same name was defined on the command line, we
499 just skip this definition. It's an error to attempt to redefine a macro without
500 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
501 It is also an error to define a macro whose name begins with the name of a
502 previously defined macro. Note: it is documented that the other way round
503 works. */
504
505 for (m = macros; m != NULL; m = m->next)
506 {
507 int len = Ustrlen(m->name);
508
509 if (Ustrcmp(m->name, name) == 0)
510 {
511 if (!m->command_line && !redef)
512 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
513 "defined (use \"==\" if you want to redefine it", name);
514 break;
515 }
516
517 if (len < namelen && Ustrstr(name, m->name) != NULL)
518 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
519 "a macro because previously defined macro \"%s\" is a substring",
520 name, m->name);
521
522 /* We cannot have this test, because it is documented that a substring
523 macro is permitted (there is even an example).
524 *
525 * if (len > namelen && Ustrstr(m->name, name) != NULL)
526 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
527 * "a macro because it is a substring of previously defined macro \"%s\"",
528 * name, m->name);
529 */
530
531 mlast = m;
532 }
533
534 /* Check for an overriding command-line definition. */
535
536 if (m != NULL && m->command_line) return;
537
538 /* Redefinition must refer to an existing macro. */
539
540 if (redef)
541 {
542 if (m == NULL)
543 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
544 "\"%s\"", name);
545 }
546
547 /* We have a new definition. The macro_item structure includes a final vector
548 called "name" which is one byte long. Thus, adding "namelen" gives us enough
549 room to store the "name" string. */
550
551 else
552 {
553 m = store_get(sizeof(macro_item) + namelen);
554 if (macros == NULL) macros = m; else mlast->next = m;
555 Ustrncpy(m->name, name, namelen);
556 m->name[namelen] = 0;
557 m->next = NULL;
558 m->command_line = FALSE;
559 }
560
561 /* Set the value of the new or redefined macro */
562
563 m->replacement = string_copy(s);
564 }
565
566
567
568
569
570 /*************************************************
571 * Read configuration line *
572 *************************************************/
573
574 /* A logical line of text is read from the configuration file into the big
575 buffer, taking account of macros, .includes, and continuations. The size of
576 big_buffer is increased if necessary. The count of configuration lines is
577 maintained. Physical input lines starting with # (ignoring leading white space,
578 and after macro replacement) and empty logical lines are always ignored.
579 Leading and trailing spaces are removed.
580
581 If we hit a line of the form "begin xxxx", the xxxx is placed in the
582 next_section vector, and the function returns NULL, indicating the end of a
583 configuration section. On end-of-file, NULL is returned with next_section
584 empty.
585
586 Arguments: none
587
588 Returns: a pointer to the first non-blank in the line,
589 or NULL if eof or end of section is reached
590 */
591
592 static uschar *
593 get_config_line(void)
594 {
595 int startoffset = 0; /* To first non-blank char in logical line */
596 int len = 0; /* Of logical line so far */
597 int newlen;
598 uschar *s, *ss;
599 macro_item *m;
600 BOOL macro_found;
601
602 /* Loop for handling continuation lines, skipping comments, and dealing with
603 .include files. */
604
605 for (;;)
606 {
607 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
608 {
609 if (config_file_stack != NULL) /* EOF inside .include */
610 {
611 (void)fclose(config_file);
612 config_file = config_file_stack->file;
613 config_filename = config_file_stack->filename;
614 config_lineno = config_file_stack->lineno;
615 config_file_stack = config_file_stack->next;
616 continue;
617 }
618
619 /* EOF at top level */
620
621 if (cstate_stack_ptr >= 0)
622 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
623 "Unexpected end of configuration file: .endif missing");
624
625 if (len != 0) break; /* EOF after continuation */
626 next_section[0] = 0; /* EOF at start of logical line */
627 return NULL;
628 }
629
630 config_lineno++;
631 newlen = len + Ustrlen(big_buffer + len);
632
633 /* Handle pathologically long physical lines - yes, it did happen - by
634 extending big_buffer at this point. The code also copes with very long
635 logical lines. */
636
637 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
638 {
639 uschar *newbuffer;
640 big_buffer_size += BIG_BUFFER_SIZE;
641 newbuffer = store_malloc(big_buffer_size);
642
643 /* This use of strcpy is OK because we know that the string in the old
644 buffer is shorter than the new buffer. */
645
646 Ustrcpy(newbuffer, big_buffer);
647 store_free(big_buffer);
648 big_buffer = newbuffer;
649 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
650 break;
651 newlen += Ustrlen(big_buffer + newlen);
652 }
653
654 /* Find the true start of the physical line - leading spaces are always
655 ignored. */
656
657 ss = big_buffer + len;
658 while (isspace(*ss)) ss++;
659
660 /* Process the physical line for macros. If this is the start of the logical
661 line, skip over initial text at the start of the line if it starts with an
662 upper case character followed by a sequence of name characters and an equals
663 sign, because that is the definition of a new macro, and we don't do
664 replacement therein. */
665
666 s = ss;
667 if (len == 0 && isupper(*s))
668 {
669 while (isalnum(*s) || *s == '_') s++;
670 while (isspace(*s)) s++;
671 if (*s != '=') s = ss; /* Not a macro definition */
672 }
673
674 /* For each defined macro, scan the line (from after XXX= if present),
675 replacing all occurrences of the macro. */
676
677 macro_found = FALSE;
678 for (m = macros; m != NULL; m = m->next)
679 {
680 uschar *p, *pp;
681 uschar *t = s;
682
683 while ((p = Ustrstr(t, m->name)) != NULL)
684 {
685 int moveby;
686 int namelen = Ustrlen(m->name);
687 int replen = Ustrlen(m->replacement);
688
689 /* Expand the buffer if necessary */
690
691 while (newlen - namelen + replen + 1 > big_buffer_size)
692 {
693 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
694 uschar *newbuffer = store_malloc(newsize);
695 memcpy(newbuffer, big_buffer, newlen + 1);
696 p = newbuffer + (p - big_buffer);
697 s = newbuffer + (s - big_buffer);
698 ss = newbuffer + (ss - big_buffer);
699 t = newbuffer + (t - big_buffer);
700 big_buffer_size = newsize;
701 store_free(big_buffer);
702 big_buffer = newbuffer;
703 }
704
705 /* Shuffle the remaining characters up or down in the buffer before
706 copying in the replacement text. Don't rescan the replacement for this
707 same macro. */
708
709 pp = p + namelen;
710 moveby = replen - namelen;
711 if (moveby != 0)
712 {
713 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
714 newlen += moveby;
715 }
716 Ustrncpy(p, m->replacement, replen);
717 t = p + replen;
718 macro_found = TRUE;
719 }
720 }
721
722 /* An empty macro replacement at the start of a line could mean that ss no
723 longer points to the first non-blank character. */
724
725 while (isspace(*ss)) ss++;
726
727 /* Check for comment lines - these are physical lines. */
728
729 if (*ss == '#') continue;
730
731 /* Handle conditionals, which are also applied to physical lines. Conditions
732 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
733 expansion occured on the rest of the line. A preliminary test for the leading
734 '.' saves effort on most lines. */
735
736 if (*ss == '.')
737 {
738 int i;
739
740 /* Search the list of conditional directives */
741
742 for (i = 0; i < cond_list_size; i++)
743 {
744 int n;
745 cond_item *c = cond_list+i;
746 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
747
748 /* The following character must be white space or end of string */
749
750 n = ss[1 + c->namelen];
751 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
752
753 /* .ifdef and .ifndef push the current state onto the stack, then set
754 a new one from the table. Stack overflow is an error */
755
756 if (c->pushpop > 0)
757 {
758 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
760 ".%s nested too deeply", c->name);
761 cstate_stack[++cstate_stack_ptr] = cstate;
762 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
763 }
764
765 /* For any of the others, stack underflow is an error. The next state
766 comes either from the stack (.endif) or from the table. */
767
768 else
769 {
770 if (cstate_stack_ptr < 0)
771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
772 ".%s without matching .ifdef", c->name);
773 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
774 next_cstate[cstate][macro_found? c->action1 : c->action2];
775 }
776
777 /* Having dealt with a directive, break the loop */
778
779 break;
780 }
781
782 /* If we have handled a conditional directive, continue with the next
783 physical line. Otherwise, fall through. */
784
785 if (i < cond_list_size) continue;
786 }
787
788 /* If the conditional state is not 0 (actively using these lines), ignore
789 this input line. */
790
791 if (cstate != 0) continue; /* Conditional skip */
792
793 /* Handle .include lines - these are also physical lines. */
794
795 if (Ustrncmp(ss, ".include", 8) == 0 &&
796 (isspace(ss[8]) ||
797 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
798 {
799 uschar *t;
800 int include_if_exists = isspace(ss[8])? 0 : 10;
801 config_file_item *save;
802 struct stat statbuf;
803
804 ss += 9 + include_if_exists;
805 while (isspace(*ss)) ss++;
806 t = ss + Ustrlen(ss);
807 while (t > ss && isspace(t[-1])) t--;
808 if (*ss == '\"' && t[-1] == '\"')
809 {
810 ss++;
811 t--;
812 }
813 *t = 0;
814
815 if (*ss != '/')
816 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
817 "absolute path \"%s\"", ss);
818
819 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
820
821 save = store_get(sizeof(config_file_item));
822 save->next = config_file_stack;
823 config_file_stack = save;
824 save->file = config_file;
825 save->filename = config_filename;
826 save->lineno = config_lineno;
827
828 config_file = Ufopen(ss, "rb");
829 if (config_file == NULL)
830 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
831 "configuration file %s", ss);
832 config_filename = string_copy(ss);
833 config_lineno = 0;
834 continue;
835 }
836
837 /* If this is the start of the logical line, remember where the non-blank
838 data starts. Otherwise shuffle down continuation lines to remove leading
839 white space. */
840
841 if (len == 0)
842 startoffset = ss - big_buffer;
843 else
844 {
845 s = big_buffer + len;
846 if (ss > s)
847 {
848 memmove(s, ss, (newlen - len) - (ss - s) + 1);
849 newlen -= ss - s;
850 }
851 }
852
853 /* Accept the new addition to the line. Remove trailing white space. */
854
855 len = newlen;
856 while (len > 0 && isspace(big_buffer[len-1])) len--;
857 big_buffer[len] = 0;
858
859 /* We are done if the line does not end in backslash and contains some data.
860 Empty logical lines are ignored. For continuations, remove the backslash and
861 go round the loop to read the continuation line. */
862
863 if (len > 0)
864 {
865 if (big_buffer[len-1] != '\\') break; /* End of logical line */
866 big_buffer[--len] = 0; /* Remove backslash */
867 }
868 } /* Loop for reading multiple physical lines */
869
870 /* We now have a logical line. Test for the end of a configuration section (or,
871 more accurately, for the start of the next section). Place the name of the next
872 section in next_section, and return NULL. If the name given is longer than
873 next_section, truncate it. It will be unrecognized later, because all the known
874 section names do fit. Leave space for pluralizing. */
875
876 s = big_buffer + startoffset; /* First non-space character */
877 if (strncmpic(s, US"begin ", 6) == 0)
878 {
879 s += 6;
880 while (isspace(*s)) s++;
881 if (big_buffer + len - s > sizeof(next_section) - 2)
882 s[sizeof(next_section) - 2] = 0;
883 Ustrcpy(next_section, s);
884 return NULL;
885 }
886
887 /* Return the first non-blank character. */
888
889 return s;
890 }
891
892
893
894 /*************************************************
895 * Read a name *
896 *************************************************/
897
898 /* The yield is the pointer to the next uschar. Names longer than the
899 output space are silently truncated. This function is also used from acl.c when
900 parsing ACLs.
901
902 Arguments:
903 name where to put the name
904 len length of name
905 s input pointer
906
907 Returns: new input pointer
908 */
909
910 uschar *
911 readconf_readname(uschar *name, int len, uschar *s)
912 {
913 int p = 0;
914 while (isspace(*s)) s++;
915 if (isalpha(*s))
916 {
917 while (isalnum(*s) || *s == '_')
918 {
919 if (p < len-1) name[p++] = *s;
920 s++;
921 }
922 }
923 name[p] = 0;
924 while (isspace(*s)) s++;
925 return s;
926 }
927
928
929
930
931 /*************************************************
932 * Read a time value *
933 *************************************************/
934
935 /* This function is also called from outside, to read argument
936 time values. The format of a time value is:
937
938 [<n>w][<n>d][<n>h][<n>m][<n>s]
939
940 as long as at least one is present. If a format error is encountered,
941 return a negative value. The value must be terminated by the given
942 terminator.
943
944 Arguments:
945 s input pointer
946 terminator required terminating character
947 return_msec if TRUE, allow fractional seconds and return milliseconds
948
949 Returns: the time value, or -1 on syntax error
950 value is seconds if return_msec is FALSE
951 value is milliseconds if return_msec is TRUE
952 */
953
954 int
955 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
956 {
957 int yield = 0;
958 for (;;)
959 {
960 int value, count;
961 double fraction;
962
963 if (!isdigit(*s)) return -1;
964 (void)sscanf(CS s, "%d%n", &value, &count);
965 s += count;
966
967 switch (*s)
968 {
969 case 'w': value *= 7;
970 case 'd': value *= 24;
971 case 'h': value *= 60;
972 case 'm': value *= 60;
973 case 's': s++;
974 break;
975
976 case '.':
977 if (!return_msec) return -1;
978 (void)sscanf(CS s, "%lf%n", &fraction, &count);
979 s += count;
980 if (*s++ != 's') return -1;
981 yield += (int)(fraction * 1000.0);
982 break;
983
984 default: return -1;
985 }
986
987 if (return_msec) value *= 1000;
988 yield += value;
989 if (*s == terminator) return yield;
990 }
991 /* Control never reaches here. */
992 }
993
994
995
996 /*************************************************
997 * Read a fixed point value *
998 *************************************************/
999
1000 /* The value is returned *1000
1001
1002 Arguments:
1003 s input pointer
1004 terminator required terminator
1005
1006 Returns: the value, or -1 on error
1007 */
1008
1009 static int
1010 readconf_readfixed(uschar *s, int terminator)
1011 {
1012 int yield = 0;
1013 int value, count;
1014 if (!isdigit(*s)) return -1;
1015 (void)sscanf(CS s, "%d%n", &value, &count);
1016 s += count;
1017 yield = value * 1000;
1018 if (*s == '.')
1019 {
1020 int m = 100;
1021 while (isdigit((*(++s))))
1022 {
1023 yield += (*s - '0') * m;
1024 m /= 10;
1025 }
1026 }
1027
1028 return (*s == terminator)? yield : (-1);
1029 }
1030
1031
1032
1033 /*************************************************
1034 * Find option in list *
1035 *************************************************/
1036
1037 /* The lists are always in order, so binary chop can be used.
1038
1039 Arguments:
1040 name the option name to search for
1041 ol the first entry in the option list
1042 last one more than the offset of the last entry in the option list
1043
1044 Returns: pointer to an option entry, or NULL if not found
1045 */
1046
1047 static optionlist *
1048 find_option(uschar *name, optionlist *ol, int last)
1049 {
1050 int first = 0;
1051 while (last > first)
1052 {
1053 int middle = (first + last)/2;
1054 int c = Ustrcmp(name, ol[middle].name);
1055 if (c == 0) return ol + middle;
1056 else if (c > 0) first = middle + 1;
1057 else last = middle;
1058 }
1059 return NULL;
1060 }
1061
1062
1063
1064 /*************************************************
1065 * Find a set flag in option list *
1066 *************************************************/
1067
1068 /* Because some versions of Unix make no restrictions on the values of uids and
1069 gids (even negative ones), we cannot represent "unset" by a special value.
1070 There is therefore a separate boolean variable for each one indicating whether
1071 a value is set or not. This function returns a pointer to the boolean, given
1072 the original option name. It is a major disaster if the flag cannot be found.
1073
1074 Arguments:
1075 name the name of the uid or gid option
1076 oltop points to the start of the relevant option list
1077 last one more than the offset of the last item in the option list
1078 data_block NULL when reading main options => data values in the option
1079 list are absolute addresses; otherwise they are byte offsets
1080 in data_block (used for driver options)
1081
1082 Returns: a pointer to the boolean flag.
1083 */
1084
1085 static BOOL *
1086 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1087 {
1088 optionlist *ol;
1089 uschar name2[64];
1090 sprintf(CS name2, "*set_%.50s", name);
1091 ol = find_option(name2, oltop, last);
1092 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1093 "Exim internal error: missing set flag for %s", name);
1094 return (data_block == NULL)? (BOOL *)(ol->value) :
1095 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1096 }
1097
1098
1099
1100
1101 /*************************************************
1102 * Output extra characters message and die *
1103 *************************************************/
1104
1105 /* Called when an option line has junk on the end. Sometimes this is because
1106 the sysadmin thinks comments are permitted.
1107
1108 Arguments:
1109 s points to the extra characters
1110 t1..t3 strings to insert in the log message
1111
1112 Returns: doesn't return; dies
1113 */
1114
1115 static void
1116 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1117 {
1118 uschar *comment = US"";
1119 if (*s == '#') comment = US" (# is comment only at line start)";
1120 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1121 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1122 }
1123
1124
1125
1126 /*************************************************
1127 * Read rewrite information *
1128 *************************************************/
1129
1130 /* Each line of rewrite information contains:
1131
1132 . A complete address in the form user@domain, possibly with
1133 leading * for each part; or alternatively, a regex.
1134
1135 . A replacement string (which will be expanded).
1136
1137 . An optional sequence of one-letter flags, indicating which
1138 headers etc. to apply this rule to.
1139
1140 All this is decoded and placed into a control block. The OR of the flags is
1141 maintained in a common word.
1142
1143 Arguments:
1144 p points to the string that makes up the rule
1145 existflags points to the overall flag word
1146 isglobal TRUE if reading global rewrite rules
1147
1148 Returns: the control block for the parsed rule.
1149 */
1150
1151 static rewrite_rule *
1152 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1153 {
1154 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1155
1156 next->next = NULL;
1157 next->key = string_dequote(&p);
1158
1159 while (isspace(*p)) p++;
1160 if (*p == 0)
1161 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1162 "missing rewrite replacement string");
1163
1164 next->flags = 0;
1165 next->replacement = string_dequote(&p);
1166
1167 while (*p != 0) switch (*p++)
1168 {
1169 case ' ': case '\t': break;
1170
1171 case 'q': next->flags |= rewrite_quit; break;
1172 case 'w': next->flags |= rewrite_whole; break;
1173
1174 case 'h': next->flags |= rewrite_all_headers; break;
1175 case 's': next->flags |= rewrite_sender; break;
1176 case 'f': next->flags |= rewrite_from; break;
1177 case 't': next->flags |= rewrite_to; break;
1178 case 'c': next->flags |= rewrite_cc; break;
1179 case 'b': next->flags |= rewrite_bcc; break;
1180 case 'r': next->flags |= rewrite_replyto; break;
1181
1182 case 'E': next->flags |= rewrite_all_envelope; break;
1183 case 'F': next->flags |= rewrite_envfrom; break;
1184 case 'T': next->flags |= rewrite_envto; break;
1185
1186 case 'Q': next->flags |= rewrite_qualify; break;
1187 case 'R': next->flags |= rewrite_repeat; break;
1188
1189 case 'S':
1190 next->flags |= rewrite_smtp;
1191 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1192 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1193 "rewrite rule has the S flag but is not a regular expression");
1194 break;
1195
1196 default:
1197 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1198 "unknown rewrite flag character '%c' "
1199 "(could be missing quotes round replacement item)", p[-1]);
1200 break;
1201 }
1202
1203 /* If no action flags are set, set all the "normal" rewrites. */
1204
1205 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1206 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1207
1208 /* Remember which exist, for optimization, and return the rule */
1209
1210 *existflags |= next->flags;
1211 return next;
1212 }
1213
1214
1215
1216
1217 /*************************************************
1218 * Read global rewrite information *
1219 *************************************************/
1220
1221 /* Each line is a single rewrite rule; it is parsed into a control block
1222 by readconf_one_rewrite(), and its flags are ORed into the global flag
1223 word rewrite_existflags. */
1224
1225 void
1226 readconf_rewrites(void)
1227 {
1228 rewrite_rule **chain = &global_rewrite_rules;
1229 uschar *p;
1230
1231 while ((p = get_config_line()) != NULL)
1232 {
1233 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1234 *chain = next;
1235 chain = &(next->next);
1236 }
1237 }
1238
1239
1240
1241 /*************************************************
1242 * Read a string *
1243 *************************************************/
1244
1245 /* Strings are read into the normal store pool. As long we aren't too
1246 near the end of the current block, the string will just use what is necessary
1247 on the top of the stacking pool, because string_cat() uses the extension
1248 mechanism.
1249
1250 Argument:
1251 s the rest of the input line
1252 name the option name (for errors)
1253
1254 Returns: pointer to the string
1255 */
1256
1257 static uschar *
1258 read_string(uschar *s, uschar *name)
1259 {
1260 uschar *yield;
1261 uschar *ss;
1262
1263 if (*s != '\"') return string_copy(s);
1264
1265 ss = s;
1266 yield = string_dequote(&s);
1267
1268 if (s == ss+1 || s[-1] != '\"')
1269 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1270 "missing quote at end of string value for %s", name);
1271
1272 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1273
1274 return yield;
1275 }
1276
1277
1278 /*************************************************
1279 * Handle option line *
1280 *************************************************/
1281
1282 /* This function is called from several places to process a line containing the
1283 setting of an option. The first argument is the line to be decoded; it has been
1284 checked not to be empty and not to start with '#'. Trailing newlines and white
1285 space have been removed. The second argument is a pointer to the list of
1286 variable names that are to be recognized, together with their types and
1287 locations, and the third argument gives the number of entries in the list.
1288
1289 The fourth argument is a pointer to a data block. If it is NULL, then the data
1290 values in the options list are absolute addresses. Otherwise, they are byte
1291 offsets in the data block.
1292
1293 String option data may continue onto several lines; this function reads further
1294 data from config_file if necessary.
1295
1296 The yield of this function is normally zero. If a string continues onto
1297 multiple lines, then the data value is permitted to be followed by a comma
1298 or a semicolon (for use in drivers) and the yield is that character.
1299
1300 Arguments:
1301 buffer contains the configuration line to be handled
1302 oltop points to the start of the relevant option list
1303 last one more than the offset of the last item in the option list
1304 data_block NULL when reading main options => data values in the option
1305 list are absolute addresses; otherwise they are byte offsets
1306 in data_block when they have opt_public set; otherwise
1307 they are byte offsets in data_block->options_block.
1308 unknown_txt format string to use in panic message for unknown option;
1309 must contain %s for option name
1310 if given as NULL, don't panic on unknown option
1311
1312 Returns: TRUE if an option was read successfully,
1313 FALSE false for an unknown option if unknown_txt == NULL,
1314 otherwise panic and die on an unknown option
1315 */
1316
1317 static BOOL
1318 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1319 void *data_block, uschar *unknown_txt)
1320 {
1321 int ptr = 0;
1322 int offset = 0;
1323 int n, count, type, value;
1324 int issecure = 0;
1325 uid_t uid;
1326 gid_t gid;
1327 BOOL boolvalue = TRUE;
1328 BOOL freesptr = TRUE;
1329 optionlist *ol, *ol2;
1330 struct passwd *pw;
1331 void *reset_point;
1332 int intbase = 0;
1333 uschar *inttype = US"";
1334 uschar *sptr;
1335 uschar *s = buffer;
1336 uschar name[64];
1337 uschar name2[64];
1338
1339 /* There may be leading spaces; thereafter, we expect an option name starting
1340 with a letter. */
1341
1342 while (isspace(*s)) s++;
1343 if (!isalpha(*s))
1344 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1345
1346 /* Read the name of the option, and skip any subsequent white space. If
1347 it turns out that what we read was "hide", set the flag indicating that
1348 this is a secure option, and loop to read the next word. */
1349
1350 for (n = 0; n < 2; n++)
1351 {
1352 while (isalnum(*s) || *s == '_')
1353 {
1354 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1355 s++;
1356 }
1357 name[ptr] = 0;
1358 while (isspace(*s)) s++;
1359 if (Ustrcmp(name, "hide") != 0) break;
1360 issecure = opt_secure;
1361 ptr = 0;
1362 }
1363
1364 /* Deal with "no_" or "not_" here for booleans */
1365
1366 if (Ustrncmp(name, "no_", 3) == 0)
1367 {
1368 boolvalue = FALSE;
1369 offset = 3;
1370 }
1371
1372 if (Ustrncmp(name, "not_", 4) == 0)
1373 {
1374 boolvalue = FALSE;
1375 offset = 4;
1376 }
1377
1378 /* Search the list for the given name. A non-existent name, or an option that
1379 is set twice, is a disaster. */
1380
1381 ol = find_option(name + offset, oltop, last);
1382
1383 if (ol == NULL)
1384 {
1385 if (unknown_txt == NULL) return FALSE;
1386 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1387 }
1388
1389 if ((ol->type & opt_set) != 0)
1390 {
1391 uschar *mname = name;
1392 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1393 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1394 "\"%s\" option set for the second time", mname);
1395 }
1396
1397 ol->type |= opt_set | issecure;
1398 type = ol->type & opt_mask;
1399
1400 /* Types with data values must be followed by '='; the "no[t]_" prefix
1401 applies only to boolean values. */
1402
1403 if (type < opt_bool || type > opt_bool_last)
1404 {
1405 if (offset != 0)
1406 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1407 "negation prefix applied to a non-boolean option");
1408 if (*s == 0)
1409 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1410 "unexpected end of line (data missing) after %s", name);
1411 if (*s != '=')
1412 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1413 }
1414
1415 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1416 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1417 ultimately expands to one of those values. */
1418
1419 else if (*s != 0 && (offset != 0 || *s != '='))
1420 extra_chars_error(s, US"boolean option ", name, US"");
1421
1422 /* Skip white space after = */
1423
1424 if (*s == '=') while (isspace((*(++s))));
1425
1426 /* If there is a data block and the opt_public flag is not set, change
1427 the data block pointer to the private options block. */
1428
1429 if (data_block != NULL && (ol->type & opt_public) == 0)
1430 data_block = (void *)(((driver_instance *)data_block)->options_block);
1431
1432 /* Now get the data according to the type. */
1433
1434 switch (type)
1435 {
1436 /* If a string value is not enclosed in quotes, it consists of
1437 the rest of the current line, verbatim. Otherwise, string escapes
1438 are processed.
1439
1440 A transport is specified as a string, which is then looked up in the
1441 list of transports. A search type is specified as one of a number of
1442 known strings.
1443
1444 A set or rewrite rules for a driver is specified as a string, which is
1445 then parsed into a suitable chain of control blocks.
1446
1447 Uids and gids are specified as strings which are then looked up in the
1448 passwd file. Lists of uids and gids are similarly specified as colon-
1449 separated strings. */
1450
1451 case opt_stringptr:
1452 case opt_uid:
1453 case opt_gid:
1454 case opt_expand_uid:
1455 case opt_expand_gid:
1456 case opt_uidlist:
1457 case opt_gidlist:
1458 case opt_rewrite:
1459
1460 reset_point = sptr = read_string(s, name);
1461
1462 /* Having read a string, we now have several different ways of using it,
1463 depending on the data type, so do another switch. If keeping the actual
1464 string is not required (because it is interpreted), freesptr is set TRUE,
1465 and at the end we reset the pool. */
1466
1467 switch (type)
1468 {
1469 /* If this was a string, set the variable to point to the new string,
1470 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1471 rules, we still keep the string (for printing), and parse the rules into a
1472 control block and flags word. */
1473
1474 case opt_stringptr:
1475 case opt_rewrite:
1476 if (data_block == NULL)
1477 *((uschar **)(ol->value)) = sptr;
1478 else
1479 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1480 freesptr = FALSE;
1481 if (type == opt_rewrite)
1482 {
1483 int sep = 0;
1484 int *flagptr;
1485 uschar *p = sptr;
1486 rewrite_rule **chain;
1487 optionlist *ol3;
1488
1489 sprintf(CS name2, "*%.50s_rules", name);
1490 ol2 = find_option(name2, oltop, last);
1491 sprintf(CS name2, "*%.50s_flags", name);
1492 ol3 = find_option(name2, oltop, last);
1493
1494 if (ol2 == NULL || ol3 == NULL)
1495 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1496 "rewrite rules not available for driver");
1497
1498 if (data_block == NULL)
1499 {
1500 chain = (rewrite_rule **)(ol2->value);
1501 flagptr = (int *)(ol3->value);
1502 }
1503 else
1504 {
1505 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1506 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1507 }
1508
1509 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1510 != NULL)
1511 {
1512 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1513 *chain = next;
1514 chain = &(next->next);
1515 }
1516
1517 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1518 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1519 "non-header rewrite - not allowed at transport time -");
1520 }
1521 break;
1522
1523 /* If it was an expanded uid, see if there is any expansion to be
1524 done by checking for the presence of a $ character. If there is, save it
1525 in the corresponding *expand_user option field. Otherwise, fall through
1526 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1527 of data. */
1528
1529 case opt_expand_uid:
1530 sprintf(CS name2, "*expand_%.50s", name);
1531 ol2 = find_option(name2, oltop, last);
1532 if (ol2 != NULL)
1533 {
1534 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1535
1536 if (data_block == NULL)
1537 *((uschar **)(ol2->value)) = ss;
1538 else
1539 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1540
1541 if (ss != NULL)
1542 {
1543 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1544 freesptr = FALSE;
1545 break;
1546 }
1547 }
1548
1549 /* Look up a fixed uid, and also make use of the corresponding gid
1550 if a passwd entry is returned and the gid has not been set. */
1551
1552 case opt_uid:
1553 if (!route_finduser(sptr, &pw, &uid))
1554 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1555 if (data_block == NULL)
1556 *((uid_t *)(ol->value)) = uid;
1557 else
1558 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1559
1560 /* Set the flag indicating a fixed value is set */
1561
1562 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1563
1564 /* Handle matching gid if we have a passwd entry: done by finding the
1565 same name with terminating "user" changed to "group"; if not found,
1566 ignore. Also ignore if the value is already set. */
1567
1568 if (pw == NULL) break;
1569 Ustrcpy(name+Ustrlen(name)-4, "group");
1570 ol2 = find_option(name, oltop, last);
1571 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1572 (ol2->type & opt_mask) == opt_expand_gid))
1573 {
1574 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1575 if (! *set_flag)
1576 {
1577 if (data_block == NULL)
1578 *((gid_t *)(ol2->value)) = pw->pw_gid;
1579 else
1580 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1581 *set_flag = TRUE;
1582 }
1583 }
1584 break;
1585
1586 /* If it was an expanded gid, see if there is any expansion to be
1587 done by checking for the presence of a $ character. If there is, save it
1588 in the corresponding *expand_user option field. Otherwise, fall through
1589 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1590 of data. */
1591
1592 case opt_expand_gid:
1593 sprintf(CS name2, "*expand_%.50s", name);
1594 ol2 = find_option(name2, oltop, last);
1595 if (ol2 != NULL)
1596 {
1597 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1598
1599 if (data_block == NULL)
1600 *((uschar **)(ol2->value)) = ss;
1601 else
1602 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1603
1604 if (ss != NULL)
1605 {
1606 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1607 freesptr = FALSE;
1608 break;
1609 }
1610 }
1611
1612 /* Handle freestanding gid */
1613
1614 case opt_gid:
1615 if (!route_findgroup(sptr, &gid))
1616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1617 if (data_block == NULL)
1618 *((gid_t *)(ol->value)) = gid;
1619 else
1620 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1621 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1622 break;
1623
1624 /* If it was a uid list, look up each individual entry, and build
1625 a vector of uids, with a count in the first element. Put the vector
1626 in malloc store so we can free the string. (We are reading into
1627 permanent store already.) */
1628
1629 case opt_uidlist:
1630 {
1631 int count = 1;
1632 uid_t *list;
1633 int ptr = 0;
1634 uschar *p;
1635 uschar *op = expand_string (sptr);
1636
1637 if (op == NULL)
1638 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1639 name, expand_string_message);
1640
1641 p = op;
1642 if (*p != 0) count++;
1643 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1644 list = store_malloc(count*sizeof(uid_t));
1645 list[ptr++] = (uid_t)(count - 1);
1646
1647 if (data_block == NULL)
1648 *((uid_t **)(ol->value)) = list;
1649 else
1650 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1651
1652 p = op;
1653 while (count-- > 1)
1654 {
1655 int sep = 0;
1656 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1657 if (!route_finduser(big_buffer, NULL, &uid))
1658 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1659 big_buffer);
1660 list[ptr++] = uid;
1661 }
1662 }
1663 break;
1664
1665 /* If it was a gid list, look up each individual entry, and build
1666 a vector of gids, with a count in the first element. Put the vector
1667 in malloc store so we can free the string. (We are reading into permanent
1668 store already.) */
1669
1670 case opt_gidlist:
1671 {
1672 int count = 1;
1673 gid_t *list;
1674 int ptr = 0;
1675 uschar *p;
1676 uschar *op = expand_string (sptr);
1677
1678 if (op == NULL)
1679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1680 name, expand_string_message);
1681
1682 p = op;
1683 if (*p != 0) count++;
1684 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1685 list = store_malloc(count*sizeof(gid_t));
1686 list[ptr++] = (gid_t)(count - 1);
1687
1688 if (data_block == NULL)
1689 *((gid_t **)(ol->value)) = list;
1690 else
1691 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1692
1693 p = op;
1694 while (count-- > 1)
1695 {
1696 int sep = 0;
1697 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1698 if (!route_findgroup(big_buffer, &gid))
1699 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1700 big_buffer);
1701 list[ptr++] = gid;
1702 }
1703 }
1704 break;
1705 }
1706
1707 /* Release store if the value of the string doesn't need to be kept. */
1708
1709 if (freesptr) store_reset(reset_point);
1710 break;
1711
1712 /* Expanded boolean: if no characters follow, or if there are no dollar
1713 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1714 save the string for later expansion in the alternate place. */
1715
1716 case opt_expand_bool:
1717 if (*s != 0 && Ustrchr(s, '$') != 0)
1718 {
1719 sprintf(CS name2, "*expand_%.50s", name);
1720 ol2 = find_option(name2, oltop, last);
1721 if (ol2 != NULL)
1722 {
1723 reset_point = sptr = read_string(s, name);
1724 if (data_block == NULL)
1725 *((uschar **)(ol2->value)) = sptr;
1726 else
1727 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1728 freesptr = FALSE;
1729 break;
1730 }
1731 }
1732 /* Fall through */
1733
1734 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1735 look for yes/not/true/false. Some booleans are stored in a single bit in
1736 a single int. There's a special fudge for verify settings; without a suffix
1737 they set both xx_sender and xx_recipient. The table points to the sender
1738 value; search subsequently for the recipient. There's another special case:
1739 opt_bool_set also notes when a boolean has been set. */
1740
1741 case opt_bool:
1742 case opt_bit:
1743 case opt_bool_verify:
1744 case opt_bool_set:
1745 if (*s != 0)
1746 {
1747 s = readconf_readname(name2, 64, s);
1748 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1749 boolvalue = TRUE;
1750 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1751 boolvalue = FALSE;
1752 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1753 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1754 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1755 US"for boolean option ", name);
1756 }
1757
1758 /* Handle single-bit type. */
1759
1760 if (type == opt_bit)
1761 {
1762 int bit = 1 << ((ol->type >> 16) & 31);
1763 int *ptr = (data_block == NULL)?
1764 (int *)(ol->value) :
1765 (int *)((uschar *)data_block + (long int)ol->value);
1766 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1767 break;
1768 }
1769
1770 /* Handle full BOOL types */
1771
1772 if (data_block == NULL)
1773 *((BOOL *)(ol->value)) = boolvalue;
1774 else
1775 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1776
1777 /* Verify fudge */
1778
1779 if (type == opt_bool_verify)
1780 {
1781 sprintf(CS name2, "%.50s_recipient", name + offset);
1782 ol2 = find_option(name2, oltop, last);
1783 if (ol2 != NULL)
1784 {
1785 if (data_block == NULL)
1786 *((BOOL *)(ol2->value)) = boolvalue;
1787 else
1788 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1789 }
1790 }
1791
1792 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1793
1794 else if (type == opt_bool_set)
1795 {
1796 sprintf(CS name2, "*set_%.50s", name + offset);
1797 ol2 = find_option(name2, oltop, last);
1798 if (ol2 != NULL)
1799 {
1800 if (data_block == NULL)
1801 *((BOOL *)(ol2->value)) = TRUE;
1802 else
1803 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1804 }
1805 }
1806 break;
1807
1808 /* Octal integer */
1809
1810 case opt_octint:
1811 intbase = 8;
1812 inttype = US"octal ";
1813
1814 /* Integer: a simple(ish) case; allow octal and hex formats, and
1815 suffixes K and M. The different types affect output, not input. */
1816
1817 case opt_mkint:
1818 case opt_int:
1819 {
1820 uschar *endptr;
1821 errno = 0;
1822 value = strtol(CS s, CSS &endptr, intbase);
1823
1824 if (endptr == s)
1825 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1826 inttype, name);
1827
1828 if (errno != ERANGE)
1829 {
1830 if (tolower(*endptr) == 'k')
1831 {
1832 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1833 else value *= 1024;
1834 endptr++;
1835 }
1836 else if (tolower(*endptr) == 'm')
1837 {
1838 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1839 errno = ERANGE;
1840 else value *= 1024*1024;
1841 endptr++;
1842 }
1843 }
1844
1845 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1846 "absolute value of integer \"%s\" is too large (overflow)", s);
1847
1848 while (isspace(*endptr)) endptr++;
1849 if (*endptr != 0)
1850 extra_chars_error(endptr, inttype, US"integer value for ", name);
1851 }
1852
1853 if (data_block == NULL)
1854 *((int *)(ol->value)) = value;
1855 else
1856 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1857 break;
1858
1859 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1860 M. */
1861
1862 case opt_Kint:
1863 {
1864 uschar *endptr;
1865 errno = 0;
1866 value = strtol(CS s, CSS &endptr, intbase);
1867
1868 if (endptr == s)
1869 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1870 inttype, name);
1871
1872 if (errno != ERANGE)
1873 {
1874 if (tolower(*endptr) == 'm')
1875 {
1876 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1877 else value *= 1024;
1878 endptr++;
1879 }
1880 else if (tolower(*endptr) == 'k')
1881 {
1882 endptr++;
1883 }
1884 else
1885 {
1886 value = (value + 512)/1024;
1887 }
1888 }
1889
1890 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1891 "absolute value of integer \"%s\" is too large (overflow)", s);
1892
1893 while (isspace(*endptr)) endptr++;
1894 if (*endptr != 0)
1895 extra_chars_error(endptr, inttype, US"integer value for ", name);
1896 }
1897
1898 if (data_block == NULL)
1899 *((int *)(ol->value)) = value;
1900 else
1901 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1902 break;
1903
1904 /* Fixed-point number: held to 3 decimal places. */
1905
1906 case opt_fixed:
1907 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1908 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1909 "fixed-point number expected for %s", name);
1910
1911 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1912 "integer \"%s\" is too large (overflow)", s);
1913
1914 value *= 1000;
1915
1916 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1917 "integer \"%s\" is too large (overflow)", s);
1918
1919 if (s[count] == '.')
1920 {
1921 int d = 100;
1922 while (isdigit(s[++count]))
1923 {
1924 value += (s[count] - '0') * d;
1925 d /= 10;
1926 }
1927 }
1928
1929 while (isspace(s[count])) count++;
1930
1931 if (s[count] != 0)
1932 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1933
1934 if (data_block == NULL)
1935 *((int *)(ol->value)) = value;
1936 else
1937 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1938 break;
1939
1940 /* There's a special routine to read time values. */
1941
1942 case opt_time:
1943 value = readconf_readtime(s, 0, FALSE);
1944 if (value < 0)
1945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1946 name);
1947 if (data_block == NULL)
1948 *((int *)(ol->value)) = value;
1949 else
1950 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1951 break;
1952
1953 /* A time list is a list of colon-separated times, with the first
1954 element holding the size of the list and the second the number of
1955 entries used. */
1956
1957 case opt_timelist:
1958 {
1959 int count = 0;
1960 int *list = (data_block == NULL)?
1961 (int *)(ol->value) :
1962 (int *)((uschar *)data_block + (long int)(ol->value));
1963
1964 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1965 {
1966 int terminator = 0;
1967 uschar *snext = Ustrchr(s, ':');
1968 if (snext != NULL)
1969 {
1970 uschar *ss = snext;
1971 while (ss > s && isspace(ss[-1])) ss--;
1972 terminator = *ss;
1973 }
1974 value = readconf_readtime(s, terminator, FALSE);
1975 if (value < 0)
1976 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1977 name);
1978 if (count > 1 && value <= list[count])
1979 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1980 "time value out of order for %s", name);
1981 list[count+1] = value;
1982 if (snext == NULL) break;
1983 s = snext + 1;
1984 while (isspace(*s)) s++;
1985 }
1986
1987 if (count > list[0] - 2)
1988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1989 name);
1990 if (count > 0 && list[2] == 0) count = 0;
1991 list[1] = count;
1992 }
1993
1994 break;
1995 }
1996
1997 return TRUE;
1998 }
1999
2000
2001
2002 /*************************************************
2003 * Print a time value *
2004 *************************************************/
2005
2006 /*
2007 Argument: a time value in seconds
2008 Returns: pointer to a fixed buffer containing the time as a string,
2009 in readconf_readtime() format
2010 */
2011
2012 uschar *
2013 readconf_printtime(int t)
2014 {
2015 int s, m, h, d, w;
2016 uschar *p = time_buffer;
2017
2018 if (t < 0)
2019 {
2020 *p++ = '-';
2021 t = -t;
2022 }
2023
2024 s = t % 60;
2025 t /= 60;
2026 m = t % 60;
2027 t /= 60;
2028 h = t % 24;
2029 t /= 24;
2030 d = t % 7;
2031 w = t/7;
2032
2033 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2034 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2035 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2036 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2037 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2038
2039 return time_buffer;
2040 }
2041
2042
2043
2044 /*************************************************
2045 * Print an individual option value *
2046 *************************************************/
2047
2048 /* This is used by the -bP option, so prints to the standard output.
2049 The entire options list is passed in as an argument, because some options come
2050 in pairs - typically uid/gid settings, which can either be explicit numerical
2051 values, or strings to be expanded later. If the numerical value is unset,
2052 search for "*expand_<name>" to see if there is a string equivalent.
2053
2054 Arguments:
2055 ol option entry, or NULL for an unknown option
2056 name option name
2057 options_block NULL for main configuration options; otherwise points to
2058 a driver block; if the option doesn't have opt_public
2059 set, then options_block->options_block is where the item
2060 resides.
2061 oltop points to the option list in which ol exists
2062 last one more than the offset of the last entry in optop
2063
2064 Returns: nothing
2065 */
2066
2067 static void
2068 print_ol(optionlist *ol, uschar *name, void *options_block,
2069 optionlist *oltop, int last)
2070 {
2071 struct passwd *pw;
2072 struct group *gr;
2073 optionlist *ol2;
2074 void *value;
2075 uid_t *uidlist;
2076 gid_t *gidlist;
2077 uschar *s;
2078 uschar name2[64];
2079
2080 if (ol == NULL)
2081 {
2082 printf("%s is not a known option\n", name);
2083 return;
2084 }
2085
2086 /* Non-admin callers cannot see options that have been flagged secure by the
2087 "hide" prefix. */
2088
2089 if (!admin_user && (ol->type & opt_secure) != 0)
2090 {
2091 printf("%s = <value not displayable>\n", name);
2092 return;
2093 }
2094
2095 /* Else show the value of the option */
2096
2097 value = ol->value;
2098 if (options_block != NULL)
2099 {
2100 if ((ol->type & opt_public) == 0)
2101 options_block = (void *)(((driver_instance *)options_block)->options_block);
2102 value = (void *)((uschar *)options_block + (long int)value);
2103 }
2104
2105 switch(ol->type & opt_mask)
2106 {
2107 case opt_stringptr:
2108 case opt_rewrite: /* Show the text value */
2109 s = *((uschar **)value);
2110 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2111 break;
2112
2113 case opt_int:
2114 printf("%s = %d\n", name, *((int *)value));
2115 break;
2116
2117 case opt_mkint:
2118 {
2119 int x = *((int *)value);
2120 if (x != 0 && (x & 1023) == 0)
2121 {
2122 int c = 'K';
2123 x >>= 10;
2124 if ((x & 1023) == 0)
2125 {
2126 c = 'M';
2127 x >>= 10;
2128 }
2129 printf("%s = %d%c\n", name, x, c);
2130 }
2131 else printf("%s = %d\n", name, x);
2132 }
2133 break;
2134
2135 case opt_Kint:
2136 {
2137 int x = *((int *)value);
2138 if (x == 0) printf("%s = 0\n", name);
2139 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2140 else printf("%s = %dK\n", name, x);
2141 }
2142 break;
2143
2144 case opt_octint:
2145 printf("%s = %#o\n", name, *((int *)value));
2146 break;
2147
2148 /* Can be negative only when "unset", in which case integer */
2149
2150 case opt_fixed:
2151 {
2152 int x = *((int *)value);
2153 int f = x % 1000;
2154 int d = 100;
2155 if (x < 0) printf("%s =\n", name); else
2156 {
2157 printf("%s = %d.", name, x/1000);
2158 do
2159 {
2160 printf("%d", f/d);
2161 f %= d;
2162 d /= 10;
2163 }
2164 while (f != 0);
2165 printf("\n");
2166 }
2167 }
2168 break;
2169
2170 /* If the numerical value is unset, try for the string value */
2171
2172 case opt_expand_uid:
2173 if (! *get_set_flag(name, oltop, last, options_block))
2174 {
2175 sprintf(CS name2, "*expand_%.50s", name);
2176 ol2 = find_option(name2, oltop, last);
2177 if (ol2 != NULL)
2178 {
2179 void *value2 = ol2->value;
2180 if (options_block != NULL)
2181 value2 = (void *)((uschar *)options_block + (long int)value2);
2182 s = *((uschar **)value2);
2183 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2184 break;
2185 }
2186 }
2187
2188 /* Else fall through */
2189
2190 case opt_uid:
2191 if (! *get_set_flag(name, oltop, last, options_block))
2192 printf("%s =\n", name);
2193 else
2194 {
2195 pw = getpwuid(*((uid_t *)value));
2196 if (pw == NULL)
2197 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2198 else printf("%s = %s\n", name, pw->pw_name);
2199 }
2200 break;
2201
2202 /* If the numerical value is unset, try for the string value */
2203
2204 case opt_expand_gid:
2205 if (! *get_set_flag(name, oltop, last, options_block))
2206 {
2207 sprintf(CS name2, "*expand_%.50s", name);
2208 ol2 = find_option(name2, oltop, last);
2209 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2210 {
2211 void *value2 = ol2->value;
2212 if (options_block != NULL)
2213 value2 = (void *)((uschar *)options_block + (long int)value2);
2214 s = *((uschar **)value2);
2215 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2216 break;
2217 }
2218 }
2219
2220 /* Else fall through */
2221
2222 case opt_gid:
2223 if (! *get_set_flag(name, oltop, last, options_block))
2224 printf("%s =\n", name);
2225 else
2226 {
2227 gr = getgrgid(*((int *)value));
2228 if (gr == NULL)
2229 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2230 else printf("%s = %s\n", name, gr->gr_name);
2231 }
2232 break;
2233
2234 case opt_uidlist:
2235 uidlist = *((uid_t **)value);
2236 printf("%s =", name);
2237 if (uidlist != NULL)
2238 {
2239 int i;
2240 uschar sep = ' ';
2241 for (i = 1; i <= (int)(uidlist[0]); i++)
2242 {
2243 uschar *name = NULL;
2244 pw = getpwuid(uidlist[i]);
2245 if (pw != NULL) name = US pw->pw_name;
2246 if (name != NULL) printf("%c%s", sep, name);
2247 else printf("%c%ld", sep, (long int)(uidlist[i]));
2248 sep = ':';
2249 }
2250 }
2251 printf("\n");
2252 break;
2253
2254 case opt_gidlist:
2255 gidlist = *((gid_t **)value);
2256 printf("%s =", name);
2257 if (gidlist != NULL)
2258 {
2259 int i;
2260 uschar sep = ' ';
2261 for (i = 1; i <= (int)(gidlist[0]); i++)
2262 {
2263 uschar *name = NULL;
2264 gr = getgrgid(gidlist[i]);
2265 if (gr != NULL) name = US gr->gr_name;
2266 if (name != NULL) printf("%c%s", sep, name);
2267 else printf("%c%ld", sep, (long int)(gidlist[i]));
2268 sep = ':';
2269 }
2270 }
2271 printf("\n");
2272 break;
2273
2274 case opt_time:
2275 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2276 break;
2277
2278 case opt_timelist:
2279 {
2280 int i;
2281 int *list = (int *)value;
2282 printf("%s = ", name);
2283 for (i = 0; i < list[1]; i++)
2284 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2285 printf("\n");
2286 }
2287 break;
2288
2289 case opt_bit:
2290 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2291 "" : "no_", name);
2292 break;
2293
2294 case opt_expand_bool:
2295 sprintf(CS name2, "*expand_%.50s", name);
2296 ol2 = find_option(name2, oltop, last);
2297 if (ol2 != NULL && ol2->value != NULL)
2298 {
2299 void *value2 = ol2->value;
2300 if (options_block != NULL)
2301 value2 = (void *)((uschar *)options_block + (long int)value2);
2302 s = *((uschar **)value2);
2303 if (s != NULL)
2304 {
2305 printf("%s = %s\n", name, string_printing(s));
2306 break;
2307 }
2308 /* s == NULL => string not set; fall through */
2309 }
2310
2311 /* Fall through */
2312
2313 case opt_bool:
2314 case opt_bool_verify:
2315 case opt_bool_set:
2316 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2317 break;
2318 }
2319 }
2320
2321
2322
2323 /*************************************************
2324 * Print value from main configuration *
2325 *************************************************/
2326
2327 /* This function, called as a result of encountering the -bP option,
2328 causes the value of any main configuration variable to be output if the
2329 second argument is NULL. There are some special values:
2330
2331 all print all main configuration options
2332 configure_file print the name of the configuration file
2333 routers print the routers' configurations
2334 transports print the transports' configuration
2335 authenticators print the authenticators' configuration
2336 router_list print a list of router names
2337 transport_list print a list of transport names
2338 authenticator_list print a list of authentication mechanism names
2339 +name print a named list item
2340 local_scan print the local_scan options
2341
2342 If the second argument is not NULL, it must be one of "router", "transport", or
2343 "authenticator" in which case the first argument identifies the driver whose
2344 options are to be printed.
2345
2346 Arguments:
2347 name option name if type == NULL; else driver name
2348 type NULL or driver type name, as described above
2349
2350 Returns: nothing
2351 */
2352
2353 void
2354 readconf_print(uschar *name, uschar *type)
2355 {
2356 BOOL names_only = FALSE;
2357 optionlist *ol;
2358 optionlist *ol2 = NULL;
2359 driver_instance *d = NULL;
2360 int size = 0;
2361
2362 if (type == NULL)
2363 {
2364 if (*name == '+')
2365 {
2366 int i;
2367 tree_node *t;
2368 BOOL found = FALSE;
2369 static uschar *types[] = { US"address", US"domain", US"host",
2370 US"localpart" };
2371 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2372 &hostlist_anchor, &localpartlist_anchor };
2373
2374 for (i = 0; i < 4; i++)
2375 {
2376 t = tree_search(*(anchors[i]), name+1);
2377 if (t != NULL)
2378 {
2379 found = TRUE;
2380 printf("%slist %s = %s\n", types[i], name+1,
2381 ((namedlist_block *)(t->data.ptr))->string);
2382 }
2383 }
2384
2385 if (!found)
2386 printf("no address, domain, host, or local part list called \"%s\" "
2387 "exists\n", name+1);
2388
2389 return;
2390 }
2391
2392 if (Ustrcmp(name, "configure_file") == 0)
2393 {
2394 printf("%s\n", CS config_main_filename);
2395 return;
2396 }
2397
2398 if (Ustrcmp(name, "all") == 0)
2399 {
2400 for (ol = optionlist_config;
2401 ol < optionlist_config + optionlist_config_size; ol++)
2402 {
2403 if ((ol->type & opt_hidden) == 0)
2404 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2405 }
2406 return;
2407 }
2408
2409 if (Ustrcmp(name, "local_scan") == 0)
2410 {
2411 #ifndef LOCAL_SCAN_HAS_OPTIONS
2412 printf("local_scan() options are not supported\n");
2413 #else
2414 for (ol = local_scan_options;
2415 ol < local_scan_options + local_scan_options_count; ol++)
2416 {
2417 print_ol(ol, US ol->name, NULL, local_scan_options,
2418 local_scan_options_count);
2419 }
2420 #endif
2421 return;
2422 }
2423
2424 if (Ustrcmp(name, "routers") == 0)
2425 {
2426 type = US"router";
2427 name = NULL;
2428 }
2429 else if (Ustrcmp(name, "transports") == 0)
2430 {
2431 type = US"transport";
2432 name = NULL;
2433 }
2434
2435 else if (Ustrcmp(name, "authenticators") == 0)
2436 {
2437 type = US"authenticator";
2438 name = NULL;
2439 }
2440
2441 else if (Ustrcmp(name, "authenticator_list") == 0)
2442 {
2443 type = US"authenticator";
2444 name = NULL;
2445 names_only = TRUE;
2446 }
2447
2448 else if (Ustrcmp(name, "router_list") == 0)
2449 {
2450 type = US"router";
2451 name = NULL;
2452 names_only = TRUE;
2453 }
2454 else if (Ustrcmp(name, "transport_list") == 0)
2455 {
2456 type = US"transport";
2457 name = NULL;
2458 names_only = TRUE;
2459 }
2460 else
2461 {
2462 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2463 name, NULL, optionlist_config, optionlist_config_size);
2464 return;
2465 }
2466 }
2467
2468 /* Handle the options for a router or transport. Skip options that are flagged
2469 as hidden. Some of these are options with names starting with '*', used for
2470 internal alternative representations of other options (which the printing
2471 function will sort out). Others are synonyms kept for backward compatibility.
2472 */
2473
2474 if (Ustrcmp(type, "router") == 0)
2475 {
2476 d = (driver_instance *)routers;
2477 ol2 = optionlist_routers;
2478 size = optionlist_routers_size;
2479 }
2480 else if (Ustrcmp(type, "transport") == 0)
2481 {
2482 d = (driver_instance *)transports;
2483 ol2 = optionlist_transports;
2484 size = optionlist_transports_size;
2485 }
2486 else if (Ustrcmp(type, "authenticator") == 0)
2487 {
2488 d = (driver_instance *)auths;
2489 ol2 = optionlist_auths;
2490 size = optionlist_auths_size;
2491 }
2492
2493 if (names_only)
2494 {
2495 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2496 return;
2497 }
2498
2499 /* Either search for a given driver, or print all of them */
2500
2501 for (; d != NULL; d = d->next)
2502 {
2503 if (name == NULL)
2504 printf("\n%s %s:\n", d->name, type);
2505 else if (Ustrcmp(d->name, name) != 0) continue;
2506
2507 for (ol = ol2; ol < ol2 + size; ol++)
2508 {
2509 if ((ol->type & opt_hidden) == 0)
2510 print_ol(ol, US ol->name, d, ol2, size);
2511 }
2512
2513 for (ol = d->info->options;
2514 ol < d->info->options + *(d->info->options_count); ol++)
2515 {
2516 if ((ol->type & opt_hidden) == 0)
2517 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2518 }
2519 if (name != NULL) return;
2520 }
2521 if (name != NULL) printf("%s %s not found\n", type, name);
2522 }
2523
2524
2525
2526 /*************************************************
2527 * Read a named list item *
2528 *************************************************/
2529
2530 /* This function reads a name and a list (i.e. string). The name is used to
2531 save the list in a tree, sorted by its name. Each entry also has a number,
2532 which can be used for caching tests, but if the string contains any expansion
2533 items other than $key, the number is set negative to inhibit caching. This
2534 mechanism is used for domain, host, and address lists that are referenced by
2535 the "+name" syntax.
2536
2537 Arguments:
2538 anchorp points to the tree anchor
2539 numberp points to the current number for this tree
2540 max the maximum number permitted
2541 s the text of the option line, starting immediately after the name
2542 of the list type
2543 tname the name of the list type, for messages
2544
2545 Returns: nothing
2546 */
2547
2548 static void
2549 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2550 uschar *tname)
2551 {
2552 BOOL forcecache = FALSE;
2553 uschar *ss;
2554 tree_node *t;
2555 namedlist_block *nb = store_get(sizeof(namedlist_block));
2556
2557 if (Ustrncmp(s, "_cache", 6) == 0)
2558 {
2559 forcecache = TRUE;
2560 s += 6;
2561 }
2562
2563 if (!isspace(*s))
2564 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2565
2566 if (*numberp >= max)
2567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2568 tname, max);
2569
2570 while (isspace(*s)) s++;
2571 ss = s;
2572 while (isalnum(*s) || *s == '_') s++;
2573 t = store_get(sizeof(tree_node) + s-ss);
2574 Ustrncpy(t->name, ss, s-ss);
2575 t->name[s-ss] = 0;
2576 while (isspace(*s)) s++;
2577
2578 if (!tree_insertnode(anchorp, t))
2579 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2580 "duplicate name \"%s\" for a named %s", t->name, tname);
2581
2582 t->data.ptr = nb;
2583 nb->number = *numberp;
2584 *numberp += 1;
2585
2586 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2587 "missing '=' after \"%s\"", t->name);
2588 while (isspace(*s)) s++;
2589 nb->string = read_string(s, t->name);
2590 nb->cache_data = NULL;
2591
2592 /* Check the string for any expansions; if any are found, mark this list
2593 uncacheable unless the user has explicited forced caching. */
2594
2595 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2596 }
2597
2598
2599
2600
2601 /*************************************************
2602 * Unpick data for a rate limit *
2603 *************************************************/
2604
2605 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2606 separate values.
2607
2608 Arguments:
2609 s string, in the form t,b,f,l
2610 where t is the threshold (integer)
2611 b is the initial delay (time)
2612 f is the multiplicative factor (fixed point)
2613 k is the maximum time (time)
2614 threshold where to store threshold
2615 base where to store base in milliseconds
2616 factor where to store factor in milliseconds
2617 limit where to store limit
2618
2619 Returns: nothing (panics on error)
2620 */
2621
2622 static void
2623 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2624 int *limit)
2625 {
2626 uschar bstring[16], lstring[16];
2627
2628 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2629 factor, lstring) == 4)
2630 {
2631 *base = readconf_readtime(bstring, 0, TRUE);
2632 *limit = readconf_readtime(lstring, 0, TRUE);
2633 if (*base >= 0 && *limit >= 0) return;
2634 }
2635 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2636 }
2637
2638
2639
2640
2641 /*************************************************
2642 * Read main configuration options *
2643 *************************************************/
2644
2645 /* This function is the first to be called for configuration reading. It
2646 opens the configuration file and reads general configuration settings until
2647 it reaches the end of the configuration section. The file is then left open so
2648 that the remaining configuration data can subsequently be read if needed for
2649 this run of Exim.
2650
2651 The configuration file must be owned either by root or exim, and be writeable
2652 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2653 in the config file, so the test is done on the compiled in values. A slight
2654 anomaly, to be carefully documented.
2655
2656 The name of the configuration file is taken from a list that is included in the
2657 binary of Exim. It can be altered from the command line, but if that is done,
2658 root privilege is immediately withdrawn unless the caller is root or exim.
2659 The first file on the list that exists is used.
2660
2661 For use on multiple systems that share file systems, first look for a
2662 configuration file whose name has the current node name on the end. If that is
2663 not found, try the generic name. For really contorted configurations, that run
2664 multiple Exims with different uid settings, first try adding the effective uid
2665 before the node name. These complications are going to waste resources on most
2666 systems. Therefore they are available only when requested by compile-time
2667 options. */
2668
2669 void
2670 readconf_main(void)
2671 {
2672 int sep = 0;
2673 struct stat statbuf;
2674 uschar *s, *filename;
2675 uschar *list = config_main_filelist;
2676
2677 /* Loop through the possible file names */
2678
2679 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2680 != NULL)
2681 {
2682 /* Cut out all the fancy processing unless specifically wanted */
2683
2684 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2685 uschar *suffix = filename + Ustrlen(filename);
2686
2687 /* Try for the node-specific file if a node name exists */
2688
2689 #ifdef CONFIGURE_FILE_USE_NODE
2690 struct utsname uts;
2691 if (uname(&uts) >= 0)
2692 {
2693 #ifdef CONFIGURE_FILE_USE_EUID
2694 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2695 config_file = Ufopen(filename, "rb");
2696 if (config_file == NULL)
2697 #endif /* CONFIGURE_FILE_USE_EUID */
2698 {
2699 sprintf(CS suffix, ".%.256s", uts.nodename);
2700 config_file = Ufopen(filename, "rb");
2701 }
2702 }
2703 #endif /* CONFIGURE_FILE_USE_NODE */
2704
2705 /* Otherwise, try the generic name, possibly with the euid added */
2706
2707 #ifdef CONFIGURE_FILE_USE_EUID
2708 if (config_file == NULL)
2709 {
2710 sprintf(CS suffix, ".%ld", (long int)original_euid);
2711 config_file = Ufopen(filename, "rb");
2712 }
2713 #endif /* CONFIGURE_FILE_USE_EUID */
2714
2715 /* Finally, try the unadorned name */
2716
2717 if (config_file == NULL)
2718 {
2719 *suffix = 0;
2720 config_file = Ufopen(filename, "rb");
2721 }
2722 #else /* if neither defined */
2723
2724 /* This is the common case when the fancy processing is not included. */
2725
2726 config_file = Ufopen(filename, "rb");
2727 #endif
2728
2729 /* If the file does not exist, continue to try any others. For any other
2730 error, break out (and die). */
2731
2732 if (config_file != NULL || errno != ENOENT) break;
2733 }
2734
2735 /* On success, save the name for verification; config_filename is used when
2736 logging configuration errors (it changes for .included files) whereas
2737 config_main_filename is the name shown by -bP. Failure to open a configuration
2738 file is a serious disaster. */
2739
2740 if (config_file != NULL)
2741 {
2742 config_filename = config_main_filename = string_copy(filename);
2743 }
2744 else
2745 {
2746 if (filename == NULL)
2747 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2748 "%s", config_main_filelist);
2749 else
2750 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2751 "configuration file %s", filename));
2752 }
2753
2754 /* Check the status of the file we have opened, unless it was specified on
2755 the command line, in which case privilege was given away at the start. */
2756
2757 if (!config_changed)
2758 {
2759 if (fstat(fileno(config_file), &statbuf) != 0)
2760 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2761 big_buffer);
2762
2763 if ((statbuf.st_uid != root_uid && /* owner not root */
2764 statbuf.st_uid != exim_uid /* owner not exim */
2765 #ifdef CONFIGURE_OWNER
2766 && statbuf.st_uid != config_uid /* owner not the special one */
2767 #endif
2768 ) || /* or */
2769 (statbuf.st_gid != exim_gid /* group not exim & */
2770 #ifdef CONFIGURE_GROUP
2771 && statbuf.st_gid != config_gid /* group not the special one */
2772 #endif
2773 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2774 /* or */
2775 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2776
2777 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2778 "wrong owner, group, or mode", big_buffer);
2779 }
2780
2781 /* Process the main configuration settings. They all begin with a lower case
2782 letter. If we see something starting with an upper case letter, it is taken as
2783 a macro definition. */
2784
2785 while ((s = get_config_line()) != NULL)
2786 {
2787 if (isupper(s[0])) read_macro_assignment(s);
2788
2789 else if (Ustrncmp(s, "domainlist", 10) == 0)
2790 read_named_list(&domainlist_anchor, &domainlist_count,
2791 MAX_NAMED_LIST, s+10, US"domain list");
2792
2793 else if (Ustrncmp(s, "hostlist", 8) == 0)
2794 read_named_list(&hostlist_anchor, &hostlist_count,
2795 MAX_NAMED_LIST, s+8, US"host list");
2796
2797 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2798 read_named_list(&addresslist_anchor, &addresslist_count,
2799 MAX_NAMED_LIST, s+11, US"address list");
2800
2801 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2802 read_named_list(&localpartlist_anchor, &localpartlist_count,
2803 MAX_NAMED_LIST, s+13, US"local part list");
2804
2805 else
2806 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2807 NULL, US"main option \"%s\" unknown");
2808 }
2809
2810
2811 /* If local_sender_retain is set, local_from_check must be unset. */
2812
2813 if (local_sender_retain && local_from_check)
2814 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2815 "local_sender_retain are set; this combination is not allowed");
2816
2817 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2818 wanted. */
2819
2820 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2821
2822 /* The max retry interval must not be greater than 24 hours. */
2823
2824 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2825
2826 /* remote_max_parallel must be > 0 */
2827
2828 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2829
2830 /* Save the configured setting of freeze_tell, so we can re-instate it at the
2831 start of a new SMTP message. */
2832
2833 freeze_tell_config = freeze_tell;
2834
2835 /* The primary host name may be required for expansion of spool_directory
2836 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2837 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2838 canonize it. Some people like upper case letters in their host names, so we
2839 don't force the case. */
2840
2841 if (primary_hostname == NULL)
2842 {
2843 uschar *hostname;
2844 struct utsname uts;
2845 if (uname(&uts) < 0)
2846 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2847 hostname = US uts.nodename;
2848
2849 if (Ustrchr(hostname, '.') == NULL)
2850 {
2851 int af = AF_INET;
2852 struct hostent *hostdata;
2853
2854 #if HAVE_IPV6
2855 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2856 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2857 TRUE, NULL) != OK))
2858 af = AF_INET6;
2859 #else
2860 af = AF_INET;
2861 #endif
2862
2863 for (;;)
2864 {
2865 #if HAVE_IPV6
2866 #if HAVE_GETIPNODEBYNAME
2867 int error_num;
2868 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2869 #else
2870 hostdata = gethostbyname2(CS hostname, af);
2871 #endif
2872 #else
2873 hostdata = gethostbyname(CS hostname);
2874 #endif
2875
2876 if (hostdata != NULL)
2877 {
2878 hostname = US hostdata->h_name;
2879 break;
2880 }
2881
2882 if (af == AF_INET) break;
2883 af = AF_INET;
2884 }
2885 }
2886
2887 primary_hostname = string_copy(hostname);
2888 }
2889
2890 /* Set up default value for smtp_active_hostname */
2891
2892 smtp_active_hostname = primary_hostname;
2893
2894 /* If spool_directory wasn't set in the build-time configuration, it must have
2895 got set above. Of course, writing to the log may not work if log_file_path is
2896 not set, but it will at least get to syslog or somewhere, with any luck. */
2897
2898 if (*spool_directory == 0)
2899 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2900 "proceed");
2901
2902 /* Expand the spool directory name; it may, for example, contain the primary
2903 host name. Same comment about failure. */
2904
2905 s = expand_string(spool_directory);
2906 if (s == NULL)
2907 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2908 "\"%s\": %s", spool_directory, expand_string_message);
2909 spool_directory = s;
2910
2911 /* Expand log_file_path, which must contain "%s" in any component that isn't
2912 the null string or "syslog". It is also allowed to contain one instance of %D.
2913 However, it must NOT contain % followed by anything else. */
2914
2915 if (*log_file_path != 0)
2916 {
2917 uschar *ss, *sss;
2918 int sep = ':'; /* Fixed for log file path */
2919 s = expand_string(log_file_path);
2920 if (s == NULL)
2921 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2922 "\"%s\": %s", log_file_path, expand_string_message);
2923
2924 ss = s;
2925 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2926 {
2927 uschar *t;
2928 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2929 t = Ustrstr(sss, "%s");
2930 if (t == NULL)
2931 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2932 "contain \"%%s\"", sss);
2933 *t = 'X';
2934 t = Ustrchr(sss, '%');
2935 if (t != NULL)
2936 {
2937 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2938 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2939 "unexpected \"%%\" character", s);
2940 }
2941 }
2942
2943 log_file_path = s;
2944 }
2945
2946 /* Interpret syslog_facility into an integer argument for 'ident' param to
2947 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2948 leading "log_". */
2949
2950 if (syslog_facility_str != NULL)
2951 {
2952 int i;
2953 uschar *s = syslog_facility_str;
2954
2955 if ((Ustrlen(syslog_facility_str) >= 4) &&
2956 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2957 s += 4;
2958
2959 for (i = 0; i < syslog_list_size; i++)
2960 {
2961 if (strcmpic(s, syslog_list[i].name) == 0)
2962 {
2963 syslog_facility = syslog_list[i].value;
2964 break;
2965 }
2966 }
2967
2968 if (i >= syslog_list_size)
2969 {
2970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2971 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2972 }
2973 }
2974
2975 /* Expand pid_file_path */
2976
2977 if (*pid_file_path != 0)
2978 {
2979 s = expand_string(pid_file_path);
2980 if (s == NULL)
2981 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2982 "\"%s\": %s", pid_file_path, expand_string_message);
2983 pid_file_path = s;
2984 }
2985
2986 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2987 message. */
2988
2989 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2990
2991 /* Unpick the SMTP rate limiting options, if set */
2992
2993 if (smtp_ratelimit_mail != NULL)
2994 {
2995 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2996 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2997 }
2998
2999 if (smtp_ratelimit_rcpt != NULL)
3000 {
3001 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3002 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3003 }
3004
3005 /* The qualify domains default to the primary host name */
3006
3007 if (qualify_domain_sender == NULL)
3008 qualify_domain_sender = primary_hostname;
3009 if (qualify_domain_recipient == NULL)
3010 qualify_domain_recipient = qualify_domain_sender;
3011
3012 /* Setting system_filter_user in the configuration sets the gid as well if a
3013 name is given, but a numerical value does not. */
3014
3015 if (system_filter_uid_set && !system_filter_gid_set)
3016 {
3017 struct passwd *pw = getpwuid(system_filter_uid);
3018 if (pw == NULL)
3019 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3020 (long int)system_filter_uid);
3021 system_filter_gid = pw->pw_gid;
3022 system_filter_gid_set = TRUE;
3023 }
3024
3025 /* If the errors_reply_to field is set, check that it is syntactically valid
3026 and ensure it contains a domain. */
3027
3028 if (errors_reply_to != NULL)
3029 {
3030 uschar *errmess;
3031 int start, end, domain;
3032 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3033 &start, &end, &domain, FALSE);
3034
3035 if (recipient == NULL)
3036 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3037 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3038
3039 if (domain == 0)
3040 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3041 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3042 }
3043
3044 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3045 smtp_accept_max must also be set. */
3046
3047 if (smtp_accept_max == 0 &&
3048 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3049 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3050 "smtp_accept_max must be set if smtp_accept_queue or "
3051 "smtp_accept_max_per_host is set");
3052
3053 /* Set up the host number if anything is specified. It is an expanded string
3054 so that it can be computed from the host name, for example. We do this last
3055 so as to ensure that everything else is set up before the expansion. */
3056
3057 if (host_number_string != NULL)
3058 {
3059 uschar *end;
3060 uschar *s = expand_string(host_number_string);
3061 long int n = Ustrtol(s, &end, 0);
3062 while (isspace(*end)) end++;
3063 if (*end != 0)
3064 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3065 "localhost_number value is not a number: %s", s);
3066 if (n > LOCALHOST_MAX)
3067 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3068 "localhost_number is greater than the maximum allowed value (%d)",
3069 LOCALHOST_MAX);
3070 host_number = n;
3071 }
3072
3073 #ifdef SUPPORT_TLS
3074 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3075
3076 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3077 tls_verify_certificates == NULL)
3078 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3079 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3080 (tls_verify_hosts != NULL)? "" : "try_");
3081 #endif
3082 }
3083
3084
3085
3086 /*************************************************
3087 * Initialize one driver *
3088 *************************************************/
3089
3090 /* This is called once the driver's generic options, if any, have been read.
3091 We can now find the driver, set up defaults for the private options, and
3092 unset any "set" bits in the private options table (which might have been
3093 set by another incarnation of the same driver).
3094
3095 Arguments:
3096 d pointer to driver instance block, with generic
3097 options filled in
3098 drivers_available vector of available drivers
3099 size_of_info size of each block in drivers_available
3100 class class of driver, for error message
3101
3102 Returns: pointer to the driver info block
3103 */
3104
3105 static driver_info *
3106 init_driver(driver_instance *d, driver_info *drivers_available,
3107 int size_of_info, uschar *class)
3108 {
3109 driver_info *dd;
3110
3111 for (dd = drivers_available; dd->driver_name[0] != 0;
3112 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3113 {
3114 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3115 {
3116 int i;
3117 int len = dd->options_len;
3118 d->info = dd;
3119 d->options_block = store_get(len);
3120 memcpy(d->options_block, dd->options_block, len);
3121 for (i = 0; i < *(dd->options_count); i++)
3122 dd->options[i].type &= ~opt_set;
3123 return dd;
3124 }
3125 }
3126
3127 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3128 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3129
3130 return NULL; /* never obeyed */
3131 }
3132
3133
3134
3135
3136 /*************************************************
3137 * Initialize driver list *
3138 *************************************************/
3139
3140 /* This function is called for routers, transports, and authentication
3141 mechanisms. It reads the data from the current point in the configuration file
3142 up to the end of the section, and sets up a chain of instance blocks according
3143 to the file's contents. The file will already have been opened by a call to
3144 readconf_main, and must be left open for subsequent reading of further data.
3145
3146 Any errors cause a panic crash. Note that the blocks with names driver_info and
3147 driver_instance must map the first portions of all the _info and _instance
3148 blocks for this shared code to work.
3149
3150 Arguments:
3151 class "router", "transport", or "authenticator"
3152 anchor &routers, &transports, &auths
3153 drivers_available available drivers
3154 size_of_info size of each info block
3155 instance_default points to default data for an instance
3156 instance_size size of instance block
3157 driver_optionlist generic option list
3158 driver_optionlist_count count of generic option list
3159
3160 Returns: nothing
3161 */
3162
3163 void
3164 readconf_driver_init(
3165 uschar *class,
3166 driver_instance **anchor,
3167 driver_info *drivers_available,
3168 int size_of_info,
3169 void *instance_default,
3170 int instance_size,
3171 optionlist *driver_optionlist,
3172 int driver_optionlist_count)
3173 {
3174 driver_instance **p = anchor;
3175 driver_instance *d = NULL;
3176 uschar *buffer;
3177
3178 while ((buffer = get_config_line()) != NULL)
3179 {
3180 uschar name[64];
3181 uschar *s;
3182
3183 /* Read the first name on the line and test for the start of a new driver. A
3184 macro definition indicates the end of the previous driver. If this isn't the
3185 start of a new driver, the line will be re-read. */
3186
3187 s = readconf_readname(name, sizeof(name), buffer);
3188
3189 /* Handle macro definition, first finishing off the initialization of the
3190 previous driver, if any. */
3191
3192 if (isupper(*name) && *s == '=')
3193 {
3194 if (d != NULL)
3195 {
3196 if (d->driver_name == NULL)
3197 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3198 "no driver defined for %s \"%s\"", class, d->name);
3199 (d->info->init)(d);
3200 d = NULL;
3201 }
3202 read_macro_assignment(buffer);
3203 continue;
3204 }
3205
3206 /* If the line starts with a name terminated by a colon, we are at the
3207 start of the definition of a new driver. The rest of the line must be
3208 blank. */
3209
3210 if (*s++ == ':')
3211 {
3212 int i;
3213
3214 /* Finish off initializing the previous driver. */
3215
3216 if (d != NULL)
3217 {
3218 if (d->driver_name == NULL)
3219 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3220 "no driver defined for %s \"%s\"", class, d->name);
3221 (d->info->init)(d);
3222 }
3223
3224 /* Check that we haven't already got a driver of this name */
3225
3226 for (d = *anchor; d != NULL; d = d->next)
3227 if (Ustrcmp(name, d->name) == 0)
3228 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3229 "there are two %ss called \"%s\"", class, name);
3230
3231 /* Set up a new driver instance data block on the chain, with
3232 its default values installed. */
3233
3234 d = store_get(instance_size);
3235 memcpy(d, instance_default, instance_size);
3236 *p = d;
3237 p = &(d->next);
3238 d->name = string_copy(name);
3239
3240 /* Clear out the "set" bits in the generic options */
3241
3242 for (i = 0; i < driver_optionlist_count; i++)
3243 driver_optionlist[i].type &= ~opt_set;
3244
3245 /* Check nothing more on this line, then do the next loop iteration. */
3246
3247 while (isspace(*s)) s++;
3248 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3249 continue;
3250 }
3251
3252 /* Not the start of a new driver. Give an error if we have not set up a
3253 current driver yet. */
3254
3255 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3256 "%s name missing", class);
3257
3258 /* First look to see if this is a generic option; if it is "driver",
3259 initialize the driver. If is it not a generic option, we can look for a
3260 private option provided that the driver has been previously set up. */
3261
3262 if (readconf_handle_option(buffer, driver_optionlist,
3263 driver_optionlist_count, d, NULL))
3264 {
3265 if (d->info == NULL && d->driver_name != NULL)
3266 init_driver(d, drivers_available, size_of_info, class);
3267 }
3268
3269 /* Handle private options - pass the generic block because some may
3270 live therein. A flag with each option indicates if it is in the public
3271 block. */
3272
3273 else if (d->info != NULL)
3274 {
3275 readconf_handle_option(buffer, d->info->options,
3276 *(d->info->options_count), d, US"option \"%s\" unknown");
3277 }
3278
3279 /* The option is not generic and the driver name has not yet been given. */
3280
3281 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3282 "(\"driver\" must be specified before any private options)", name);
3283 }
3284
3285 /* Run the initialization function for the final driver. */
3286
3287 if (d != NULL)
3288 {
3289 if (d->driver_name == NULL)
3290 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3291 "no driver defined for %s \"%s\"", class, d->name);
3292 (d->info->init)(d);