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[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.31 2007/07/04 11:03:46 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
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_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
142 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
143 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
144 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
145 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
146 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
147 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
148 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
149 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
150 #ifdef WITH_CONTENT_SCAN
151 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
152 #endif
153 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
154 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
155 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
156 #ifdef SUPPORT_TLS
157 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
158 #endif
159 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
160 { "admin_groups", opt_gidlist, &admin_groups },
161 { "allow_domain_literals", opt_bool, &allow_domain_literals },
162 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
163 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
164 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
165 { "auto_thaw", opt_time, &auto_thaw },
166 #ifdef WITH_CONTENT_SCAN
167 { "av_scanner", opt_stringptr, &av_scanner },
168 #endif
169 { "bi_command", opt_stringptr, &bi_command },
170 #ifdef EXPERIMENTAL_BRIGHTMAIL
171 { "bmi_config_file", opt_stringptr, &bmi_config_file },
172 #endif
173 { "bounce_message_file", opt_stringptr, &bounce_message_file },
174 { "bounce_message_text", opt_stringptr, &bounce_message_text },
175 { "bounce_return_body", opt_bool, &bounce_return_body },
176 { "bounce_return_message", opt_bool, &bounce_return_message },
177 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
178 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
179 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
180 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
181 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
182 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
183 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
184 { "check_log_inodes", opt_int, &check_log_inodes },
185 { "check_log_space", opt_Kint, &check_log_space },
186 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
187 { "check_spool_inodes", opt_int, &check_spool_inodes },
188 { "check_spool_space", opt_Kint, &check_spool_space },
189 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
190 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
191 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
192 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
193 { "delay_warning", opt_timelist, &delay_warning },
194 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
195 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
196 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
197 { "delivery_date_remove", opt_bool, &delivery_date_remove },
198 #ifdef ENABLE_DISABLE_FSYNC
199 { "disable_fsync", opt_bool, &disable_fsync },
200 #endif
201 { "disable_ipv6", opt_bool, &disable_ipv6 },
202 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
203 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
204 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
205 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
206 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
207 { "dns_retrans", opt_time, &dns_retrans },
208 { "dns_retry", opt_int, &dns_retry },
209 /* This option is now a no-op, retained for compability */
210 { "drop_cr", opt_bool, &drop_cr },
211 /*********************************************************/
212 { "dsn_from", opt_stringptr, &dsn_from },
213 { "envelope_to_remove", opt_bool, &envelope_to_remove },
214 { "errors_copy", opt_stringptr, &errors_copy },
215 { "errors_reply_to", opt_stringptr, &errors_reply_to },
216 { "exim_group", opt_gid, &exim_gid },
217 { "exim_path", opt_stringptr, &exim_path },
218 { "exim_user", opt_uid, &exim_uid },
219 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
220 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
221 { "finduser_retries", opt_int, &finduser_retries },
222 { "freeze_tell", opt_stringptr, &freeze_tell },
223 { "gecos_name", opt_stringptr, &gecos_name },
224 { "gecos_pattern", opt_stringptr, &gecos_pattern },
225 #ifdef SUPPORT_TLS
226 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
227 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
228 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
229 #endif
230 { "header_line_maxsize", opt_int, &header_line_maxsize },
231 { "header_maxsize", opt_int, &header_maxsize },
232 { "headers_charset", opt_stringptr, &headers_charset },
233 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
234 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
235 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
236 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
237 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
238 { "hold_domains", opt_stringptr, &hold_domains },
239 { "host_lookup", opt_stringptr, &host_lookup },
240 { "host_lookup_order", opt_stringptr, &host_lookup_order },
241 { "host_reject_connection", opt_stringptr, &host_reject_connection },
242 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
243 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
244 #ifdef LOOKUP_IBASE
245 { "ibase_servers", opt_stringptr, &ibase_servers },
246 #endif
247 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
248 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
249 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
250 { "keep_malformed", opt_time, &keep_malformed },
251 #ifdef LOOKUP_LDAP
252 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
253 { "ldap_version", opt_int, &eldap_version },
254 #endif
255 { "local_from_check", opt_bool, &local_from_check },
256 { "local_from_prefix", opt_stringptr, &local_from_prefix },
257 { "local_from_suffix", opt_stringptr, &local_from_suffix },
258 { "local_interfaces", opt_stringptr, &local_interfaces },
259 { "local_scan_timeout", opt_time, &local_scan_timeout },
260 { "local_sender_retain", opt_bool, &local_sender_retain },
261 { "localhost_number", opt_stringptr, &host_number_string },
262 { "log_file_path", opt_stringptr, &log_file_path },
263 { "log_selector", opt_stringptr, &log_selector_string },
264 { "log_timezone", opt_bool, &log_timezone },
265 { "lookup_open_max", opt_int, &lookup_open_max },
266 { "max_username_length", opt_int, &max_username_length },
267 { "message_body_visible", opt_mkint, &message_body_visible },
268 { "message_id_header_domain", opt_stringptr, &message_id_domain },
269 { "message_id_header_text", opt_stringptr, &message_id_text },
270 { "message_logs", opt_bool, &message_logs },
271 { "message_size_limit", opt_stringptr, &message_size_limit },
272 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
273 { "move_frozen_messages", opt_bool, &move_frozen_messages },
274 #endif
275 { "mua_wrapper", opt_bool, &mua_wrapper },
276 #ifdef LOOKUP_MYSQL
277 { "mysql_servers", opt_stringptr, &mysql_servers },
278 #endif
279 { "never_users", opt_uidlist, &never_users },
280 #ifdef LOOKUP_ORACLE
281 { "oracle_servers", opt_stringptr, &oracle_servers },
282 #endif
283 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
284 #ifdef EXIM_PERL
285 { "perl_at_start", opt_bool, &opt_perl_at_start },
286 { "perl_startup", opt_stringptr, &opt_perl_startup },
287 #endif
288 #ifdef LOOKUP_PGSQL
289 { "pgsql_servers", opt_stringptr, &pgsql_servers },
290 #endif
291 { "pid_file_path", opt_stringptr, &pid_file_path },
292 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
293 { "preserve_message_logs", opt_bool, &preserve_message_logs },
294 { "primary_hostname", opt_stringptr, &primary_hostname },
295 { "print_topbitchars", opt_bool, &print_topbitchars },
296 { "process_log_path", opt_stringptr, &process_log_path },
297 { "prod_requires_admin", opt_bool, &prod_requires_admin },
298 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
299 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
300 { "queue_domains", opt_stringptr, &queue_domains },
301 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
302 { "queue_only", opt_bool, &queue_only },
303 { "queue_only_file", opt_stringptr, &queue_only_file },
304 { "queue_only_load", opt_fixed, &queue_only_load },
305 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
306 { "queue_only_override", opt_bool, &queue_only_override },
307 { "queue_run_in_order", opt_bool, &queue_run_in_order },
308 { "queue_run_max", opt_int, &queue_run_max },
309 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
310 { "receive_timeout", opt_time, &receive_timeout },
311 { "received_header_text", opt_stringptr, &received_header_text },
312 { "received_headers_max", opt_int, &received_headers_max },
313 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
314 { "recipients_max", opt_int, &recipients_max },
315 { "recipients_max_reject", opt_bool, &recipients_max_reject },
316 { "remote_max_parallel", opt_int, &remote_max_parallel },
317 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
318 { "retry_data_expire", opt_time, &retry_data_expire },
319 { "retry_interval_max", opt_time, &retry_interval_max },
320 { "return_path_remove", opt_bool, &return_path_remove },
321 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
322 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
323 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
324 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
325 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
326 { "smtp_accept_max", opt_int, &smtp_accept_max },
327 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
328 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
329 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
330 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
331 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
332 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
333 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
334 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
335 { "smtp_banner", opt_stringptr, &smtp_banner },
336 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
337 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
338 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
339 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
340 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
341 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
342 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
343 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
344 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
345 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
346 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
347 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
348 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
349 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
350 #ifdef WITH_CONTENT_SCAN
351 { "spamd_address", opt_stringptr, &spamd_address },
352 #endif
353 { "split_spool_directory", opt_bool, &split_spool_directory },
354 { "spool_directory", opt_stringptr, &spool_directory },
355 #ifdef LOOKUP_SQLITE
356 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
357 #endif
358 #ifdef EXPERIMENTAL_SRS
359 { "srs_config", opt_stringptr, &srs_config },
360 { "srs_hashlength", opt_int, &srs_hashlength },
361 { "srs_hashmin", opt_int, &srs_hashmin },
362 { "srs_maxage", opt_int, &srs_maxage },
363 { "srs_secrets", opt_stringptr, &srs_secrets },
364 { "srs_usehash", opt_bool, &srs_usehash },
365 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
366 #endif
367 { "strict_acl_vars", opt_bool, &strict_acl_vars },
368 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
369 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
370 { "syslog_duplication", opt_bool, &syslog_duplication },
371 { "syslog_facility", opt_stringptr, &syslog_facility_str },
372 { "syslog_processname", opt_stringptr, &syslog_processname },
373 { "syslog_timestamp", opt_bool, &syslog_timestamp },
374 { "system_filter", opt_stringptr, &system_filter },
375 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
376 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
377 { "system_filter_group", opt_gid, &system_filter_gid },
378 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
379 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
380 { "system_filter_user", opt_uid, &system_filter_uid },
381 { "tcp_nodelay", opt_bool, &tcp_nodelay },
382 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
383 { "timezone", opt_stringptr, &timezone_string },
384 #ifdef SUPPORT_TLS
385 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
386 { "tls_certificate", opt_stringptr, &tls_certificate },
387 { "tls_crl", opt_stringptr, &tls_crl },
388 { "tls_dhparam", opt_stringptr, &tls_dhparam },
389 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
390 { "tls_privatekey", opt_stringptr, &tls_privatekey },
391 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
392 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
393 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
394 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
395 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
396 #endif
397 { "trusted_groups", opt_gidlist, &trusted_groups },
398 { "trusted_users", opt_uidlist, &trusted_users },
399 { "unknown_login", opt_stringptr, &unknown_login },
400 { "unknown_username", opt_stringptr, &unknown_username },
401 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
402 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
403 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
404 { "warn_message_file", opt_stringptr, &warn_message_file },
405 { "write_rejectlog", opt_bool, &write_rejectlog }
406 };
407
408 static int optionlist_config_size =
409 sizeof(optionlist_config)/sizeof(optionlist);
410
411
412
413 /*************************************************
414 * Find the name of an option *
415 *************************************************/
416
417 /* This function is to aid debugging. Various functions take arguments that are
418 pointer variables in the options table or in option tables for various drivers.
419 For debugging output, it is useful to be able to find the name of the option
420 which is currently being processed. This function finds it, if it exists, by
421 searching the table(s).
422
423 Arguments: a value that is presumed to be in the table above
424 Returns: the option name, or an empty string
425 */
426
427 uschar *
428 readconf_find_option(void *p)
429 {
430 int i;
431 router_instance *r;
432 transport_instance *t;
433
434 for (i = 0; i < optionlist_config_size; i++)
435 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
436
437 for (r = routers; r != NULL; r = r->next)
438 {
439 router_info *ri = r->info;
440 for (i = 0; i < ri->options_count[0]; i++)
441 {
442 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
443 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
444 return US ri->options[i].name;
445 }
446 }
447
448 for (t = transports; t != NULL; t = t->next)
449 {
450 transport_info *ti = t->info;
451 for (i = 0; i < ti->options_count[0]; i++)
452 {
453 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
454 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
455 return US ti->options[i].name;
456 }
457 }
458
459 return US"";
460 }
461
462
463
464
465 /*************************************************
466 * Deal with an assignment to a macro *
467 *************************************************/
468
469 /* This function is called when a line that starts with an upper case letter is
470 encountered. The argument "line" should contain a complete logical line, and
471 start with the first letter of the macro name. The macro name and the
472 replacement text are extracted and stored. Redefinition of existing,
473 non-command line, macros is permitted using '==' instead of '='.
474
475 Arguments:
476 s points to the start of the logical line
477
478 Returns: nothing
479 */
480
481 static void
482 read_macro_assignment(uschar *s)
483 {
484 uschar name[64];
485 int namelen = 0;
486 BOOL redef = FALSE;
487 macro_item *m;
488 macro_item *mlast = NULL;
489
490 while (isalnum(*s) || *s == '_')
491 {
492 if (namelen >= sizeof(name) - 1)
493 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
494 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
495 name[namelen++] = *s++;
496 }
497 name[namelen] = 0;
498
499 while (isspace(*s)) s++;
500 if (*s++ != '=')
501 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
502
503 if (*s == '=')
504 {
505 redef = TRUE;
506 s++;
507 }
508 while (isspace(*s)) s++;
509
510 /* If an existing macro of the same name was defined on the command line, we
511 just skip this definition. It's an error to attempt to redefine a macro without
512 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
513 It is also an error to define a macro whose name begins with the name of a
514 previously defined macro. Note: it is documented that the other way round
515 works. */
516
517 for (m = macros; m != NULL; m = m->next)
518 {
519 int len = Ustrlen(m->name);
520
521 if (Ustrcmp(m->name, name) == 0)
522 {
523 if (!m->command_line && !redef)
524 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
525 "defined (use \"==\" if you want to redefine it", name);
526 break;
527 }
528
529 if (len < namelen && Ustrstr(name, m->name) != NULL)
530 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
531 "a macro because previously defined macro \"%s\" is a substring",
532 name, m->name);
533
534 /* We cannot have this test, because it is documented that a substring
535 macro is permitted (there is even an example).
536 *
537 * if (len > namelen && Ustrstr(m->name, name) != NULL)
538 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
539 * "a macro because it is a substring of previously defined macro \"%s\"",
540 * name, m->name);
541 */
542
543 mlast = m;
544 }
545
546 /* Check for an overriding command-line definition. */
547
548 if (m != NULL && m->command_line) return;
549
550 /* Redefinition must refer to an existing macro. */
551
552 if (redef)
553 {
554 if (m == NULL)
555 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
556 "\"%s\"", name);
557 }
558
559 /* We have a new definition. The macro_item structure includes a final vector
560 called "name" which is one byte long. Thus, adding "namelen" gives us enough
561 room to store the "name" string. */
562
563 else
564 {
565 m = store_get(sizeof(macro_item) + namelen);
566 if (macros == NULL) macros = m; else mlast->next = m;
567 Ustrncpy(m->name, name, namelen);
568 m->name[namelen] = 0;
569 m->next = NULL;
570 m->command_line = FALSE;
571 }
572
573 /* Set the value of the new or redefined macro */
574
575 m->replacement = string_copy(s);
576 }
577
578
579
580
581
582 /*************************************************
583 * Read configuration line *
584 *************************************************/
585
586 /* A logical line of text is read from the configuration file into the big
587 buffer, taking account of macros, .includes, and continuations. The size of
588 big_buffer is increased if necessary. The count of configuration lines is
589 maintained. Physical input lines starting with # (ignoring leading white space,
590 and after macro replacement) and empty logical lines are always ignored.
591 Leading and trailing spaces are removed.
592
593 If we hit a line of the form "begin xxxx", the xxxx is placed in the
594 next_section vector, and the function returns NULL, indicating the end of a
595 configuration section. On end-of-file, NULL is returned with next_section
596 empty.
597
598 Arguments: none
599
600 Returns: a pointer to the first non-blank in the line,
601 or NULL if eof or end of section is reached
602 */
603
604 static uschar *
605 get_config_line(void)
606 {
607 int startoffset = 0; /* To first non-blank char in logical line */
608 int len = 0; /* Of logical line so far */
609 int newlen;
610 uschar *s, *ss;
611 macro_item *m;
612 BOOL macro_found;
613
614 /* Loop for handling continuation lines, skipping comments, and dealing with
615 .include files. */
616
617 for (;;)
618 {
619 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
620 {
621 if (config_file_stack != NULL) /* EOF inside .include */
622 {
623 (void)fclose(config_file);
624 config_file = config_file_stack->file;
625 config_filename = config_file_stack->filename;
626 config_lineno = config_file_stack->lineno;
627 config_file_stack = config_file_stack->next;
628 continue;
629 }
630
631 /* EOF at top level */
632
633 if (cstate_stack_ptr >= 0)
634 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
635 "Unexpected end of configuration file: .endif missing");
636
637 if (len != 0) break; /* EOF after continuation */
638 next_section[0] = 0; /* EOF at start of logical line */
639 return NULL;
640 }
641
642 config_lineno++;
643 newlen = len + Ustrlen(big_buffer + len);
644
645 /* Handle pathologically long physical lines - yes, it did happen - by
646 extending big_buffer at this point. The code also copes with very long
647 logical lines. */
648
649 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
650 {
651 uschar *newbuffer;
652 big_buffer_size += BIG_BUFFER_SIZE;
653 newbuffer = store_malloc(big_buffer_size);
654
655 /* This use of strcpy is OK because we know that the string in the old
656 buffer is shorter than the new buffer. */
657
658 Ustrcpy(newbuffer, big_buffer);
659 store_free(big_buffer);
660 big_buffer = newbuffer;
661 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
662 break;
663 newlen += Ustrlen(big_buffer + newlen);
664 }
665
666 /* Find the true start of the physical line - leading spaces are always
667 ignored. */
668
669 ss = big_buffer + len;
670 while (isspace(*ss)) ss++;
671
672 /* Process the physical line for macros. If this is the start of the logical
673 line, skip over initial text at the start of the line if it starts with an
674 upper case character followed by a sequence of name characters and an equals
675 sign, because that is the definition of a new macro, and we don't do
676 replacement therein. */
677
678 s = ss;
679 if (len == 0 && isupper(*s))
680 {
681 while (isalnum(*s) || *s == '_') s++;
682 while (isspace(*s)) s++;
683 if (*s != '=') s = ss; /* Not a macro definition */
684 }
685
686 /* For each defined macro, scan the line (from after XXX= if present),
687 replacing all occurrences of the macro. */
688
689 macro_found = FALSE;
690 for (m = macros; m != NULL; m = m->next)
691 {
692 uschar *p, *pp;
693 uschar *t = s;
694
695 while ((p = Ustrstr(t, m->name)) != NULL)
696 {
697 int moveby;
698 int namelen = Ustrlen(m->name);
699 int replen = Ustrlen(m->replacement);
700
701 /* Expand the buffer if necessary */
702
703 while (newlen - namelen + replen + 1 > big_buffer_size)
704 {
705 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
706 uschar *newbuffer = store_malloc(newsize);
707 memcpy(newbuffer, big_buffer, newlen + 1);
708 p = newbuffer + (p - big_buffer);
709 s = newbuffer + (s - big_buffer);
710 ss = newbuffer + (ss - big_buffer);
711 t = newbuffer + (t - big_buffer);
712 big_buffer_size = newsize;
713 store_free(big_buffer);
714 big_buffer = newbuffer;
715 }
716
717 /* Shuffle the remaining characters up or down in the buffer before
718 copying in the replacement text. Don't rescan the replacement for this
719 same macro. */
720
721 pp = p + namelen;
722 moveby = replen - namelen;
723 if (moveby != 0)
724 {
725 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
726 newlen += moveby;
727 }
728 Ustrncpy(p, m->replacement, replen);
729 t = p + replen;
730 macro_found = TRUE;
731 }
732 }
733
734 /* An empty macro replacement at the start of a line could mean that ss no
735 longer points to the first non-blank character. */
736
737 while (isspace(*ss)) ss++;
738
739 /* Check for comment lines - these are physical lines. */
740
741 if (*ss == '#') continue;
742
743 /* Handle conditionals, which are also applied to physical lines. Conditions
744 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
745 expansion occured on the rest of the line. A preliminary test for the leading
746 '.' saves effort on most lines. */
747
748 if (*ss == '.')
749 {
750 int i;
751
752 /* Search the list of conditional directives */
753
754 for (i = 0; i < cond_list_size; i++)
755 {
756 int n;
757 cond_item *c = cond_list+i;
758 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
759
760 /* The following character must be white space or end of string */
761
762 n = ss[1 + c->namelen];
763 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
764
765 /* .ifdef and .ifndef push the current state onto the stack, then set
766 a new one from the table. Stack overflow is an error */
767
768 if (c->pushpop > 0)
769 {
770 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
772 ".%s nested too deeply", c->name);
773 cstate_stack[++cstate_stack_ptr] = cstate;
774 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
775 }
776
777 /* For any of the others, stack underflow is an error. The next state
778 comes either from the stack (.endif) or from the table. */
779
780 else
781 {
782 if (cstate_stack_ptr < 0)
783 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
784 ".%s without matching .ifdef", c->name);
785 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
786 next_cstate[cstate][macro_found? c->action1 : c->action2];
787 }
788
789 /* Having dealt with a directive, break the loop */
790
791 break;
792 }
793
794 /* If we have handled a conditional directive, continue with the next
795 physical line. Otherwise, fall through. */
796
797 if (i < cond_list_size) continue;
798 }
799
800 /* If the conditional state is not 0 (actively using these lines), ignore
801 this input line. */
802
803 if (cstate != 0) continue; /* Conditional skip */
804
805 /* Handle .include lines - these are also physical lines. */
806
807 if (Ustrncmp(ss, ".include", 8) == 0 &&
808 (isspace(ss[8]) ||
809 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
810 {
811 uschar *t;
812 int include_if_exists = isspace(ss[8])? 0 : 10;
813 config_file_item *save;
814 struct stat statbuf;
815
816 ss += 9 + include_if_exists;
817 while (isspace(*ss)) ss++;
818 t = ss + Ustrlen(ss);
819 while (t > ss && isspace(t[-1])) t--;
820 if (*ss == '\"' && t[-1] == '\"')
821 {
822 ss++;
823 t--;
824 }
825 *t = 0;
826
827 if (*ss != '/')
828 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
829 "absolute path \"%s\"", ss);
830
831 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
832
833 save = store_get(sizeof(config_file_item));
834 save->next = config_file_stack;
835 config_file_stack = save;
836 save->file = config_file;
837 save->filename = config_filename;
838 save->lineno = config_lineno;
839
840 config_file = Ufopen(ss, "rb");
841 if (config_file == NULL)
842 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
843 "configuration file %s", ss);
844 config_filename = string_copy(ss);
845 config_lineno = 0;
846 continue;
847 }
848
849 /* If this is the start of the logical line, remember where the non-blank
850 data starts. Otherwise shuffle down continuation lines to remove leading
851 white space. */
852
853 if (len == 0)
854 startoffset = ss - big_buffer;
855 else
856 {
857 s = big_buffer + len;
858 if (ss > s)
859 {
860 memmove(s, ss, (newlen - len) - (ss - s) + 1);
861 newlen -= ss - s;
862 }
863 }
864
865 /* Accept the new addition to the line. Remove trailing white space. */
866
867 len = newlen;
868 while (len > 0 && isspace(big_buffer[len-1])) len--;
869 big_buffer[len] = 0;
870
871 /* We are done if the line does not end in backslash and contains some data.
872 Empty logical lines are ignored. For continuations, remove the backslash and
873 go round the loop to read the continuation line. */
874
875 if (len > 0)
876 {
877 if (big_buffer[len-1] != '\\') break; /* End of logical line */
878 big_buffer[--len] = 0; /* Remove backslash */
879 }
880 } /* Loop for reading multiple physical lines */
881
882 /* We now have a logical line. Test for the end of a configuration section (or,
883 more accurately, for the start of the next section). Place the name of the next
884 section in next_section, and return NULL. If the name given is longer than
885 next_section, truncate it. It will be unrecognized later, because all the known
886 section names do fit. Leave space for pluralizing. */
887
888 s = big_buffer + startoffset; /* First non-space character */
889 if (strncmpic(s, US"begin ", 6) == 0)
890 {
891 s += 6;
892 while (isspace(*s)) s++;
893 if (big_buffer + len - s > sizeof(next_section) - 2)
894 s[sizeof(next_section) - 2] = 0;
895 Ustrcpy(next_section, s);
896 return NULL;
897 }
898
899 /* Return the first non-blank character. */
900
901 return s;
902 }
903
904
905
906 /*************************************************
907 * Read a name *
908 *************************************************/
909
910 /* The yield is the pointer to the next uschar. Names longer than the
911 output space are silently truncated. This function is also used from acl.c when
912 parsing ACLs.
913
914 Arguments:
915 name where to put the name
916 len length of name
917 s input pointer
918
919 Returns: new input pointer
920 */
921
922 uschar *
923 readconf_readname(uschar *name, int len, uschar *s)
924 {
925 int p = 0;
926 while (isspace(*s)) s++;
927 if (isalpha(*s))
928 {
929 while (isalnum(*s) || *s == '_')
930 {
931 if (p < len-1) name[p++] = *s;
932 s++;
933 }
934 }
935 name[p] = 0;
936 while (isspace(*s)) s++;
937 return s;
938 }
939
940
941
942
943 /*************************************************
944 * Read a time value *
945 *************************************************/
946
947 /* This function is also called from outside, to read argument
948 time values. The format of a time value is:
949
950 [<n>w][<n>d][<n>h][<n>m][<n>s]
951
952 as long as at least one is present. If a format error is encountered,
953 return a negative value. The value must be terminated by the given
954 terminator.
955
956 Arguments:
957 s input pointer
958 terminator required terminating character
959 return_msec if TRUE, allow fractional seconds and return milliseconds
960
961 Returns: the time value, or -1 on syntax error
962 value is seconds if return_msec is FALSE
963 value is milliseconds if return_msec is TRUE
964 */
965
966 int
967 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
968 {
969 int yield = 0;
970 for (;;)
971 {
972 int value, count;
973 double fraction;
974
975 if (!isdigit(*s)) return -1;
976 (void)sscanf(CS s, "%d%n", &value, &count);
977 s += count;
978
979 switch (*s)
980 {
981 case 'w': value *= 7;
982 case 'd': value *= 24;
983 case 'h': value *= 60;
984 case 'm': value *= 60;
985 case 's': s++;
986 break;
987
988 case '.':
989 if (!return_msec) return -1;
990 (void)sscanf(CS s, "%lf%n", &fraction, &count);
991 s += count;
992 if (*s++ != 's') return -1;
993 yield += (int)(fraction * 1000.0);
994 break;
995
996 default: return -1;
997 }
998
999 if (return_msec) value *= 1000;
1000 yield += value;
1001 if (*s == terminator) return yield;
1002 }
1003 /* Control never reaches here. */
1004 }
1005
1006
1007
1008 /*************************************************
1009 * Read a fixed point value *
1010 *************************************************/
1011
1012 /* The value is returned *1000
1013
1014 Arguments:
1015 s input pointer
1016 terminator required terminator
1017
1018 Returns: the value, or -1 on error
1019 */
1020
1021 static int
1022 readconf_readfixed(uschar *s, int terminator)
1023 {
1024 int yield = 0;
1025 int value, count;
1026 if (!isdigit(*s)) return -1;
1027 (void)sscanf(CS s, "%d%n", &value, &count);
1028 s += count;
1029 yield = value * 1000;
1030 if (*s == '.')
1031 {
1032 int m = 100;
1033 while (isdigit((*(++s))))
1034 {
1035 yield += (*s - '0') * m;
1036 m /= 10;
1037 }
1038 }
1039
1040 return (*s == terminator)? yield : (-1);
1041 }
1042
1043
1044
1045 /*************************************************
1046 * Find option in list *
1047 *************************************************/
1048
1049 /* The lists are always in order, so binary chop can be used.
1050
1051 Arguments:
1052 name the option name to search for
1053 ol the first entry in the option list
1054 last one more than the offset of the last entry in the option list
1055
1056 Returns: pointer to an option entry, or NULL if not found
1057 */
1058
1059 static optionlist *
1060 find_option(uschar *name, optionlist *ol, int last)
1061 {
1062 int first = 0;
1063 while (last > first)
1064 {
1065 int middle = (first + last)/2;
1066 int c = Ustrcmp(name, ol[middle].name);
1067 if (c == 0) return ol + middle;
1068 else if (c > 0) first = middle + 1;
1069 else last = middle;
1070 }
1071 return NULL;
1072 }
1073
1074
1075
1076 /*************************************************
1077 * Find a set flag in option list *
1078 *************************************************/
1079
1080 /* Because some versions of Unix make no restrictions on the values of uids and
1081 gids (even negative ones), we cannot represent "unset" by a special value.
1082 There is therefore a separate boolean variable for each one indicating whether
1083 a value is set or not. This function returns a pointer to the boolean, given
1084 the original option name. It is a major disaster if the flag cannot be found.
1085
1086 Arguments:
1087 name the name of the uid or gid option
1088 oltop points to the start of the relevant option list
1089 last one more than the offset of the last item in the option list
1090 data_block NULL when reading main options => data values in the option
1091 list are absolute addresses; otherwise they are byte offsets
1092 in data_block (used for driver options)
1093
1094 Returns: a pointer to the boolean flag.
1095 */
1096
1097 static BOOL *
1098 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1099 {
1100 optionlist *ol;
1101 uschar name2[64];
1102 sprintf(CS name2, "*set_%.50s", name);
1103 ol = find_option(name2, oltop, last);
1104 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1105 "Exim internal error: missing set flag for %s", name);
1106 return (data_block == NULL)? (BOOL *)(ol->value) :
1107 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1108 }
1109
1110
1111
1112
1113 /*************************************************
1114 * Output extra characters message and die *
1115 *************************************************/
1116
1117 /* Called when an option line has junk on the end. Sometimes this is because
1118 the sysadmin thinks comments are permitted.
1119
1120 Arguments:
1121 s points to the extra characters
1122 t1..t3 strings to insert in the log message
1123
1124 Returns: doesn't return; dies
1125 */
1126
1127 static void
1128 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1129 {
1130 uschar *comment = US"";
1131 if (*s == '#') comment = US" (# is comment only at line start)";
1132 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1133 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1134 }
1135
1136
1137
1138 /*************************************************
1139 * Read rewrite information *
1140 *************************************************/
1141
1142 /* Each line of rewrite information contains:
1143
1144 . A complete address in the form user@domain, possibly with
1145 leading * for each part; or alternatively, a regex.
1146
1147 . A replacement string (which will be expanded).
1148
1149 . An optional sequence of one-letter flags, indicating which
1150 headers etc. to apply this rule to.
1151
1152 All this is decoded and placed into a control block. The OR of the flags is
1153 maintained in a common word.
1154
1155 Arguments:
1156 p points to the string that makes up the rule
1157 existflags points to the overall flag word
1158 isglobal TRUE if reading global rewrite rules
1159
1160 Returns: the control block for the parsed rule.
1161 */
1162
1163 static rewrite_rule *
1164 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1165 {
1166 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1167
1168 next->next = NULL;
1169 next->key = string_dequote(&p);
1170
1171 while (isspace(*p)) p++;
1172 if (*p == 0)
1173 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1174 "missing rewrite replacement string");
1175
1176 next->flags = 0;
1177 next->replacement = string_dequote(&p);
1178
1179 while (*p != 0) switch (*p++)
1180 {
1181 case ' ': case '\t': break;
1182
1183 case 'q': next->flags |= rewrite_quit; break;
1184 case 'w': next->flags |= rewrite_whole; break;
1185
1186 case 'h': next->flags |= rewrite_all_headers; break;
1187 case 's': next->flags |= rewrite_sender; break;
1188 case 'f': next->flags |= rewrite_from; break;
1189 case 't': next->flags |= rewrite_to; break;
1190 case 'c': next->flags |= rewrite_cc; break;
1191 case 'b': next->flags |= rewrite_bcc; break;
1192 case 'r': next->flags |= rewrite_replyto; break;
1193
1194 case 'E': next->flags |= rewrite_all_envelope; break;
1195 case 'F': next->flags |= rewrite_envfrom; break;
1196 case 'T': next->flags |= rewrite_envto; break;
1197
1198 case 'Q': next->flags |= rewrite_qualify; break;
1199 case 'R': next->flags |= rewrite_repeat; break;
1200
1201 case 'S':
1202 next->flags |= rewrite_smtp;
1203 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1204 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1205 "rewrite rule has the S flag but is not a regular expression");
1206 break;
1207
1208 default:
1209 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1210 "unknown rewrite flag character '%c' "
1211 "(could be missing quotes round replacement item)", p[-1]);
1212 break;
1213 }
1214
1215 /* If no action flags are set, set all the "normal" rewrites. */
1216
1217 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1218 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1219
1220 /* Remember which exist, for optimization, and return the rule */
1221
1222 *existflags |= next->flags;
1223 return next;
1224 }
1225
1226
1227
1228
1229 /*************************************************
1230 * Read global rewrite information *
1231 *************************************************/
1232
1233 /* Each line is a single rewrite rule; it is parsed into a control block
1234 by readconf_one_rewrite(), and its flags are ORed into the global flag
1235 word rewrite_existflags. */
1236
1237 void
1238 readconf_rewrites(void)
1239 {
1240 rewrite_rule **chain = &global_rewrite_rules;
1241 uschar *p;
1242
1243 while ((p = get_config_line()) != NULL)
1244 {
1245 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1246 *chain = next;
1247 chain = &(next->next);
1248 }
1249 }
1250
1251
1252
1253 /*************************************************
1254 * Read a string *
1255 *************************************************/
1256
1257 /* Strings are read into the normal store pool. As long we aren't too
1258 near the end of the current block, the string will just use what is necessary
1259 on the top of the stacking pool, because string_cat() uses the extension
1260 mechanism.
1261
1262 Argument:
1263 s the rest of the input line
1264 name the option name (for errors)
1265
1266 Returns: pointer to the string
1267 */
1268
1269 static uschar *
1270 read_string(uschar *s, uschar *name)
1271 {
1272 uschar *yield;
1273 uschar *ss;
1274
1275 if (*s != '\"') return string_copy(s);
1276
1277 ss = s;
1278 yield = string_dequote(&s);
1279
1280 if (s == ss+1 || s[-1] != '\"')
1281 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1282 "missing quote at end of string value for %s", name);
1283
1284 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1285
1286 return yield;
1287 }
1288
1289
1290 /*************************************************
1291 * Handle option line *
1292 *************************************************/
1293
1294 /* This function is called from several places to process a line containing the
1295 setting of an option. The first argument is the line to be decoded; it has been
1296 checked not to be empty and not to start with '#'. Trailing newlines and white
1297 space have been removed. The second argument is a pointer to the list of
1298 variable names that are to be recognized, together with their types and
1299 locations, and the third argument gives the number of entries in the list.
1300
1301 The fourth argument is a pointer to a data block. If it is NULL, then the data
1302 values in the options list are absolute addresses. Otherwise, they are byte
1303 offsets in the data block.
1304
1305 String option data may continue onto several lines; this function reads further
1306 data from config_file if necessary.
1307
1308 The yield of this function is normally zero. If a string continues onto
1309 multiple lines, then the data value is permitted to be followed by a comma
1310 or a semicolon (for use in drivers) and the yield is that character.
1311
1312 Arguments:
1313 buffer contains the configuration line to be handled
1314 oltop points to the start of the relevant option list
1315 last one more than the offset of the last item in the option list
1316 data_block NULL when reading main options => data values in the option
1317 list are absolute addresses; otherwise they are byte offsets
1318 in data_block when they have opt_public set; otherwise
1319 they are byte offsets in data_block->options_block.
1320 unknown_txt format string to use in panic message for unknown option;
1321 must contain %s for option name
1322 if given as NULL, don't panic on unknown option
1323
1324 Returns: TRUE if an option was read successfully,
1325 FALSE false for an unknown option if unknown_txt == NULL,
1326 otherwise panic and die on an unknown option
1327 */
1328
1329 static BOOL
1330 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1331 void *data_block, uschar *unknown_txt)
1332 {
1333 int ptr = 0;
1334 int offset = 0;
1335 int n, count, type, value;
1336 int issecure = 0;
1337 uid_t uid;
1338 gid_t gid;
1339 BOOL boolvalue = TRUE;
1340 BOOL freesptr = TRUE;
1341 optionlist *ol, *ol2;
1342 struct passwd *pw;
1343 void *reset_point;
1344 int intbase = 0;
1345 uschar *inttype = US"";
1346 uschar *sptr;
1347 uschar *s = buffer;
1348 uschar name[64];
1349 uschar name2[64];
1350
1351 /* There may be leading spaces; thereafter, we expect an option name starting
1352 with a letter. */
1353
1354 while (isspace(*s)) s++;
1355 if (!isalpha(*s))
1356 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1357
1358 /* Read the name of the option, and skip any subsequent white space. If
1359 it turns out that what we read was "hide", set the flag indicating that
1360 this is a secure option, and loop to read the next word. */
1361
1362 for (n = 0; n < 2; n++)
1363 {
1364 while (isalnum(*s) || *s == '_')
1365 {
1366 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1367 s++;
1368 }
1369 name[ptr] = 0;
1370 while (isspace(*s)) s++;
1371 if (Ustrcmp(name, "hide") != 0) break;
1372 issecure = opt_secure;
1373 ptr = 0;
1374 }
1375
1376 /* Deal with "no_" or "not_" here for booleans */
1377
1378 if (Ustrncmp(name, "no_", 3) == 0)
1379 {
1380 boolvalue = FALSE;
1381 offset = 3;
1382 }
1383
1384 if (Ustrncmp(name, "not_", 4) == 0)
1385 {
1386 boolvalue = FALSE;
1387 offset = 4;
1388 }
1389
1390 /* Search the list for the given name. A non-existent name, or an option that
1391 is set twice, is a disaster. */
1392
1393 ol = find_option(name + offset, oltop, last);
1394
1395 if (ol == NULL)
1396 {
1397 if (unknown_txt == NULL) return FALSE;
1398 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1399 }
1400
1401 if ((ol->type & opt_set) != 0)
1402 {
1403 uschar *mname = name;
1404 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1405 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1406 "\"%s\" option set for the second time", mname);
1407 }
1408
1409 ol->type |= opt_set | issecure;
1410 type = ol->type & opt_mask;
1411
1412 /* Types with data values must be followed by '='; the "no[t]_" prefix
1413 applies only to boolean values. */
1414
1415 if (type < opt_bool || type > opt_bool_last)
1416 {
1417 if (offset != 0)
1418 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1419 "negation prefix applied to a non-boolean option");
1420 if (*s == 0)
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1422 "unexpected end of line (data missing) after %s", name);
1423 if (*s != '=')
1424 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1425 }
1426
1427 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1428 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1429 ultimately expands to one of those values. */
1430
1431 else if (*s != 0 && (offset != 0 || *s != '='))
1432 extra_chars_error(s, US"boolean option ", name, US"");
1433
1434 /* Skip white space after = */
1435
1436 if (*s == '=') while (isspace((*(++s))));
1437
1438 /* If there is a data block and the opt_public flag is not set, change
1439 the data block pointer to the private options block. */
1440
1441 if (data_block != NULL && (ol->type & opt_public) == 0)
1442 data_block = (void *)(((driver_instance *)data_block)->options_block);
1443
1444 /* Now get the data according to the type. */
1445
1446 switch (type)
1447 {
1448 /* If a string value is not enclosed in quotes, it consists of
1449 the rest of the current line, verbatim. Otherwise, string escapes
1450 are processed.
1451
1452 A transport is specified as a string, which is then looked up in the
1453 list of transports. A search type is specified as one of a number of
1454 known strings.
1455
1456 A set or rewrite rules for a driver is specified as a string, which is
1457 then parsed into a suitable chain of control blocks.
1458
1459 Uids and gids are specified as strings which are then looked up in the
1460 passwd file. Lists of uids and gids are similarly specified as colon-
1461 separated strings. */
1462
1463 case opt_stringptr:
1464 case opt_uid:
1465 case opt_gid:
1466 case opt_expand_uid:
1467 case opt_expand_gid:
1468 case opt_uidlist:
1469 case opt_gidlist:
1470 case opt_rewrite:
1471
1472 reset_point = sptr = read_string(s, name);
1473
1474 /* Having read a string, we now have several different ways of using it,
1475 depending on the data type, so do another switch. If keeping the actual
1476 string is not required (because it is interpreted), freesptr is set TRUE,
1477 and at the end we reset the pool. */
1478
1479 switch (type)
1480 {
1481 /* If this was a string, set the variable to point to the new string,
1482 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1483 rules, we still keep the string (for printing), and parse the rules into a
1484 control block and flags word. */
1485
1486 case opt_stringptr:
1487 case opt_rewrite:
1488 if (data_block == NULL)
1489 *((uschar **)(ol->value)) = sptr;
1490 else
1491 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1492 freesptr = FALSE;
1493 if (type == opt_rewrite)
1494 {
1495 int sep = 0;
1496 int *flagptr;
1497 uschar *p = sptr;
1498 rewrite_rule **chain;
1499 optionlist *ol3;
1500
1501 sprintf(CS name2, "*%.50s_rules", name);
1502 ol2 = find_option(name2, oltop, last);
1503 sprintf(CS name2, "*%.50s_flags", name);
1504 ol3 = find_option(name2, oltop, last);
1505
1506 if (ol2 == NULL || ol3 == NULL)
1507 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1508 "rewrite rules not available for driver");
1509
1510 if (data_block == NULL)
1511 {
1512 chain = (rewrite_rule **)(ol2->value);
1513 flagptr = (int *)(ol3->value);
1514 }
1515 else
1516 {
1517 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1518 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1519 }
1520
1521 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1522 != NULL)
1523 {
1524 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1525 *chain = next;
1526 chain = &(next->next);
1527 }
1528
1529 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1530 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1531 "non-header rewrite - not allowed at transport time -");
1532 }
1533 break;
1534
1535 /* If it was an expanded uid, see if there is any expansion to be
1536 done by checking for the presence of a $ character. If there is, save it
1537 in the corresponding *expand_user option field. Otherwise, fall through
1538 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1539 of data. */
1540
1541 case opt_expand_uid:
1542 sprintf(CS name2, "*expand_%.50s", name);
1543 ol2 = find_option(name2, oltop, last);
1544 if (ol2 != NULL)
1545 {
1546 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1547
1548 if (data_block == NULL)
1549 *((uschar **)(ol2->value)) = ss;
1550 else
1551 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1552
1553 if (ss != NULL)
1554 {
1555 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1556 freesptr = FALSE;
1557 break;
1558 }
1559 }
1560
1561 /* Look up a fixed uid, and also make use of the corresponding gid
1562 if a passwd entry is returned and the gid has not been set. */
1563
1564 case opt_uid:
1565 if (!route_finduser(sptr, &pw, &uid))
1566 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1567 if (data_block == NULL)
1568 *((uid_t *)(ol->value)) = uid;
1569 else
1570 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1571
1572 /* Set the flag indicating a fixed value is set */
1573
1574 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1575
1576 /* Handle matching gid if we have a passwd entry: done by finding the
1577 same name with terminating "user" changed to "group"; if not found,
1578 ignore. Also ignore if the value is already set. */
1579
1580 if (pw == NULL) break;
1581 Ustrcpy(name+Ustrlen(name)-4, "group");
1582 ol2 = find_option(name, oltop, last);
1583 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1584 (ol2->type & opt_mask) == opt_expand_gid))
1585 {
1586 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1587 if (! *set_flag)
1588 {
1589 if (data_block == NULL)
1590 *((gid_t *)(ol2->value)) = pw->pw_gid;
1591 else
1592 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1593 *set_flag = TRUE;
1594 }
1595 }
1596 break;
1597
1598 /* If it was an expanded gid, see if there is any expansion to be
1599 done by checking for the presence of a $ character. If there is, save it
1600 in the corresponding *expand_user option field. Otherwise, fall through
1601 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1602 of data. */
1603
1604 case opt_expand_gid:
1605 sprintf(CS name2, "*expand_%.50s", name);
1606 ol2 = find_option(name2, oltop, last);
1607 if (ol2 != NULL)
1608 {
1609 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1610
1611 if (data_block == NULL)
1612 *((uschar **)(ol2->value)) = ss;
1613 else
1614 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1615
1616 if (ss != NULL)
1617 {
1618 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1619 freesptr = FALSE;
1620 break;
1621 }
1622 }
1623
1624 /* Handle freestanding gid */
1625
1626 case opt_gid:
1627 if (!route_findgroup(sptr, &gid))
1628 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1629 if (data_block == NULL)
1630 *((gid_t *)(ol->value)) = gid;
1631 else
1632 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1633 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1634 break;
1635
1636 /* If it was a uid list, look up each individual entry, and build
1637 a vector of uids, with a count in the first element. Put the vector
1638 in malloc store so we can free the string. (We are reading into
1639 permanent store already.) */
1640
1641 case opt_uidlist:
1642 {
1643 int count = 1;
1644 uid_t *list;
1645 int ptr = 0;
1646 uschar *p;
1647 uschar *op = expand_string (sptr);
1648
1649 if (op == NULL)
1650 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1651 name, expand_string_message);
1652
1653 p = op;
1654 if (*p != 0) count++;
1655 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1656 list = store_malloc(count*sizeof(uid_t));
1657 list[ptr++] = (uid_t)(count - 1);
1658
1659 if (data_block == NULL)
1660 *((uid_t **)(ol->value)) = list;
1661 else
1662 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1663
1664 p = op;
1665 while (count-- > 1)
1666 {
1667 int sep = 0;
1668 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1669 if (!route_finduser(big_buffer, NULL, &uid))
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1671 big_buffer);
1672 list[ptr++] = uid;
1673 }
1674 }
1675 break;
1676
1677 /* If it was a gid list, look up each individual entry, and build
1678 a vector of gids, with a count in the first element. Put the vector
1679 in malloc store so we can free the string. (We are reading into permanent
1680 store already.) */
1681
1682 case opt_gidlist:
1683 {
1684 int count = 1;
1685 gid_t *list;
1686 int ptr = 0;
1687 uschar *p;
1688 uschar *op = expand_string (sptr);
1689
1690 if (op == NULL)
1691 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1692 name, expand_string_message);
1693
1694 p = op;
1695 if (*p != 0) count++;
1696 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1697 list = store_malloc(count*sizeof(gid_t));
1698 list[ptr++] = (gid_t)(count - 1);
1699
1700 if (data_block == NULL)
1701 *((gid_t **)(ol->value)) = list;
1702 else
1703 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1704
1705 p = op;
1706 while (count-- > 1)
1707 {
1708 int sep = 0;
1709 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1710 if (!route_findgroup(big_buffer, &gid))
1711 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1712 big_buffer);
1713 list[ptr++] = gid;
1714 }
1715 }
1716 break;
1717 }
1718
1719 /* Release store if the value of the string doesn't need to be kept. */
1720
1721 if (freesptr) store_reset(reset_point);
1722 break;
1723
1724 /* Expanded boolean: if no characters follow, or if there are no dollar
1725 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1726 save the string for later expansion in the alternate place. */
1727
1728 case opt_expand_bool:
1729 if (*s != 0 && Ustrchr(s, '$') != 0)
1730 {
1731 sprintf(CS name2, "*expand_%.50s", name);
1732 ol2 = find_option(name2, oltop, last);
1733 if (ol2 != NULL)
1734 {
1735 reset_point = sptr = read_string(s, name);
1736 if (data_block == NULL)
1737 *((uschar **)(ol2->value)) = sptr;
1738 else
1739 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1740 freesptr = FALSE;
1741 break;
1742 }
1743 }
1744 /* Fall through */
1745
1746 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1747 look for yes/not/true/false. Some booleans are stored in a single bit in
1748 a single int. There's a special fudge for verify settings; without a suffix
1749 they set both xx_sender and xx_recipient. The table points to the sender
1750 value; search subsequently for the recipient. There's another special case:
1751 opt_bool_set also notes when a boolean has been set. */
1752
1753 case opt_bool:
1754 case opt_bit:
1755 case opt_bool_verify:
1756 case opt_bool_set:
1757 if (*s != 0)
1758 {
1759 s = readconf_readname(name2, 64, s);
1760 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1761 boolvalue = TRUE;
1762 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1763 boolvalue = FALSE;
1764 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1765 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1766 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1767 US"for boolean option ", name);
1768 }
1769
1770 /* Handle single-bit type. */
1771
1772 if (type == opt_bit)
1773 {
1774 int bit = 1 << ((ol->type >> 16) & 31);
1775 int *ptr = (data_block == NULL)?
1776 (int *)(ol->value) :
1777 (int *)((uschar *)data_block + (long int)ol->value);
1778 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1779 break;
1780 }
1781
1782 /* Handle full BOOL types */
1783
1784 if (data_block == NULL)
1785 *((BOOL *)(ol->value)) = boolvalue;
1786 else
1787 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1788
1789 /* Verify fudge */
1790
1791 if (type == opt_bool_verify)
1792 {
1793 sprintf(CS name2, "%.50s_recipient", name + offset);
1794 ol2 = find_option(name2, oltop, last);
1795 if (ol2 != NULL)
1796 {
1797 if (data_block == NULL)
1798 *((BOOL *)(ol2->value)) = boolvalue;
1799 else
1800 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1801 }
1802 }
1803
1804 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1805
1806 else if (type == opt_bool_set)
1807 {
1808 sprintf(CS name2, "*set_%.50s", name + offset);
1809 ol2 = find_option(name2, oltop, last);
1810 if (ol2 != NULL)
1811 {
1812 if (data_block == NULL)
1813 *((BOOL *)(ol2->value)) = TRUE;
1814 else
1815 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1816 }
1817 }
1818 break;
1819
1820 /* Octal integer */
1821
1822 case opt_octint:
1823 intbase = 8;
1824 inttype = US"octal ";
1825
1826 /* Integer: a simple(ish) case; allow octal and hex formats, and
1827 suffixes K and M. The different types affect output, not input. */
1828
1829 case opt_mkint:
1830 case opt_int:
1831 {
1832 uschar *endptr;
1833 long int lvalue;
1834
1835 errno = 0;
1836 lvalue = strtol(CS s, CSS &endptr, intbase);
1837
1838 if (endptr == s)
1839 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1840 inttype, name);
1841
1842 if (errno != ERANGE)
1843 {
1844 if (tolower(*endptr) == 'k')
1845 {
1846 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1847 else lvalue *= 1024;
1848 endptr++;
1849 }
1850 else if (tolower(*endptr) == 'm')
1851 {
1852 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1853 errno = ERANGE;
1854 else lvalue *= 1024*1024;
1855 endptr++;
1856 }
1857 }
1858
1859 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1860 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1861 "absolute value of integer \"%s\" is too large (overflow)", s);
1862
1863 while (isspace(*endptr)) endptr++;
1864 if (*endptr != 0)
1865 extra_chars_error(endptr, inttype, US"integer value for ", name);
1866
1867 value = (int)lvalue;
1868 }
1869
1870 if (data_block == NULL)
1871 *((int *)(ol->value)) = value;
1872 else
1873 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1874 break;
1875
1876 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1877 M. */
1878
1879 case opt_Kint:
1880 {
1881 uschar *endptr;
1882 errno = 0;
1883 value = strtol(CS s, CSS &endptr, intbase);
1884
1885 if (endptr == s)
1886 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1887 inttype, name);
1888
1889 if (errno != ERANGE)
1890 {
1891 if (tolower(*endptr) == 'm')
1892 {
1893 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1894 else value *= 1024;
1895 endptr++;
1896 }
1897 else if (tolower(*endptr) == 'k')
1898 {
1899 endptr++;
1900 }
1901 else
1902 {
1903 value = (value + 512)/1024;
1904 }
1905 }
1906
1907 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1908 "absolute value of integer \"%s\" is too large (overflow)", s);
1909
1910 while (isspace(*endptr)) endptr++;
1911 if (*endptr != 0)
1912 extra_chars_error(endptr, inttype, US"integer value for ", name);
1913 }
1914
1915 if (data_block == NULL)
1916 *((int *)(ol->value)) = value;
1917 else
1918 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1919 break;
1920
1921 /* Fixed-point number: held to 3 decimal places. */
1922
1923 case opt_fixed:
1924 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1925 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1926 "fixed-point number expected for %s", name);
1927
1928 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1929 "integer \"%s\" is too large (overflow)", s);
1930
1931 value *= 1000;
1932
1933 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1934 "integer \"%s\" is too large (overflow)", s);
1935
1936 if (s[count] == '.')
1937 {
1938 int d = 100;
1939 while (isdigit(s[++count]))
1940 {
1941 value += (s[count] - '0') * d;
1942 d /= 10;
1943 }
1944 }
1945
1946 while (isspace(s[count])) count++;
1947
1948 if (s[count] != 0)
1949 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1950
1951 if (data_block == NULL)
1952 *((int *)(ol->value)) = value;
1953 else
1954 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1955 break;
1956
1957 /* There's a special routine to read time values. */
1958
1959 case opt_time:
1960 value = readconf_readtime(s, 0, FALSE);
1961 if (value < 0)
1962 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1963 name);
1964 if (data_block == NULL)
1965 *((int *)(ol->value)) = value;
1966 else
1967 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1968 break;
1969
1970 /* A time list is a list of colon-separated times, with the first
1971 element holding the size of the list and the second the number of
1972 entries used. */
1973
1974 case opt_timelist:
1975 {
1976 int count = 0;
1977 int *list = (data_block == NULL)?
1978 (int *)(ol->value) :
1979 (int *)((uschar *)data_block + (long int)(ol->value));
1980
1981 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1982 {
1983 int terminator = 0;
1984 uschar *snext = Ustrchr(s, ':');
1985 if (snext != NULL)
1986 {
1987 uschar *ss = snext;
1988 while (ss > s && isspace(ss[-1])) ss--;
1989 terminator = *ss;
1990 }
1991 value = readconf_readtime(s, terminator, FALSE);
1992 if (value < 0)
1993 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1994 name);
1995 if (count > 1 && value <= list[count])
1996 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1997 "time value out of order for %s", name);
1998 list[count+1] = value;
1999 if (snext == NULL) break;
2000 s = snext + 1;
2001 while (isspace(*s)) s++;
2002 }
2003
2004 if (count > list[0] - 2)
2005 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2006 name);
2007 if (count > 0 && list[2] == 0) count = 0;
2008 list[1] = count;
2009 }
2010
2011 break;
2012 }
2013
2014 return TRUE;
2015 }
2016
2017
2018
2019 /*************************************************
2020 * Print a time value *
2021 *************************************************/
2022
2023 /*
2024 Argument: a time value in seconds
2025 Returns: pointer to a fixed buffer containing the time as a string,
2026 in readconf_readtime() format
2027 */
2028
2029 uschar *
2030 readconf_printtime(int t)
2031 {
2032 int s, m, h, d, w;
2033 uschar *p = time_buffer;
2034
2035 if (t < 0)
2036 {
2037 *p++ = '-';
2038 t = -t;
2039 }
2040
2041 s = t % 60;
2042 t /= 60;
2043 m = t % 60;
2044 t /= 60;
2045 h = t % 24;
2046 t /= 24;
2047 d = t % 7;
2048 w = t/7;
2049
2050 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2051 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2052 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2053 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2054 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2055
2056 return time_buffer;
2057 }
2058
2059
2060
2061 /*************************************************
2062 * Print an individual option value *
2063 *************************************************/
2064
2065 /* This is used by the -bP option, so prints to the standard output.
2066 The entire options list is passed in as an argument, because some options come
2067 in pairs - typically uid/gid settings, which can either be explicit numerical
2068 values, or strings to be expanded later. If the numerical value is unset,
2069 search for "*expand_<name>" to see if there is a string equivalent.
2070
2071 Arguments:
2072 ol option entry, or NULL for an unknown option
2073 name option name
2074 options_block NULL for main configuration options; otherwise points to
2075 a driver block; if the option doesn't have opt_public
2076 set, then options_block->options_block is where the item
2077 resides.
2078 oltop points to the option list in which ol exists
2079 last one more than the offset of the last entry in optop
2080
2081 Returns: nothing
2082 */
2083
2084 static void
2085 print_ol(optionlist *ol, uschar *name, void *options_block,
2086 optionlist *oltop, int last)
2087 {
2088 struct passwd *pw;
2089 struct group *gr;
2090 optionlist *ol2;
2091 void *value;
2092 uid_t *uidlist;
2093 gid_t *gidlist;
2094 uschar *s;
2095 uschar name2[64];
2096
2097 if (ol == NULL)
2098 {
2099 printf("%s is not a known option\n", name);
2100 return;
2101 }
2102
2103 /* Non-admin callers cannot see options that have been flagged secure by the
2104 "hide" prefix. */
2105
2106 if (!admin_user && (ol->type & opt_secure) != 0)
2107 {
2108 printf("%s = <value not displayable>\n", name);
2109 return;
2110 }
2111
2112 /* Else show the value of the option */
2113
2114 value = ol->value;
2115 if (options_block != NULL)
2116 {
2117 if ((ol->type & opt_public) == 0)
2118 options_block = (void *)(((driver_instance *)options_block)->options_block);
2119 value = (void *)((uschar *)options_block + (long int)value);
2120 }
2121
2122 switch(ol->type & opt_mask)
2123 {
2124 case opt_stringptr:
2125 case opt_rewrite: /* Show the text value */
2126 s = *((uschar **)value);
2127 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2128 break;
2129
2130 case opt_int:
2131 printf("%s = %d\n", name, *((int *)value));
2132 break;
2133
2134 case opt_mkint:
2135 {
2136 int x = *((int *)value);
2137 if (x != 0 && (x & 1023) == 0)
2138 {
2139 int c = 'K';
2140 x >>= 10;
2141 if ((x & 1023) == 0)
2142 {
2143 c = 'M';
2144 x >>= 10;
2145 }
2146 printf("%s = %d%c\n", name, x, c);
2147 }
2148 else printf("%s = %d\n", name, x);
2149 }
2150 break;
2151
2152 case opt_Kint:
2153 {
2154 int x = *((int *)value);
2155 if (x == 0) printf("%s = 0\n", name);
2156 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2157 else printf("%s = %dK\n", name, x);
2158 }
2159 break;
2160
2161 case opt_octint:
2162 printf("%s = %#o\n", name, *((int *)value));
2163 break;
2164
2165 /* Can be negative only when "unset", in which case integer */
2166
2167 case opt_fixed:
2168 {
2169 int x = *((int *)value);
2170 int f = x % 1000;
2171 int d = 100;
2172 if (x < 0) printf("%s =\n", name); else
2173 {
2174 printf("%s = %d.", name, x/1000);
2175 do
2176 {
2177 printf("%d", f/d);
2178 f %= d;
2179 d /= 10;
2180 }
2181 while (f != 0);
2182 printf("\n");
2183 }
2184 }
2185 break;
2186
2187 /* If the numerical value is unset, try for the string value */
2188
2189 case opt_expand_uid:
2190 if (! *get_set_flag(name, oltop, last, options_block))
2191 {
2192 sprintf(CS name2, "*expand_%.50s", name);
2193 ol2 = find_option(name2, oltop, last);
2194 if (ol2 != NULL)
2195 {
2196 void *value2 = ol2->value;
2197 if (options_block != NULL)
2198 value2 = (void *)((uschar *)options_block + (long int)value2);
2199 s = *((uschar **)value2);
2200 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2201 break;
2202 }
2203 }
2204
2205 /* Else fall through */
2206
2207 case opt_uid:
2208 if (! *get_set_flag(name, oltop, last, options_block))
2209 printf("%s =\n", name);
2210 else
2211 {
2212 pw = getpwuid(*((uid_t *)value));
2213 if (pw == NULL)
2214 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2215 else printf("%s = %s\n", name, pw->pw_name);
2216 }
2217 break;
2218
2219 /* If the numerical value is unset, try for the string value */
2220
2221 case opt_expand_gid:
2222 if (! *get_set_flag(name, oltop, last, options_block))
2223 {
2224 sprintf(CS name2, "*expand_%.50s", name);
2225 ol2 = find_option(name2, oltop, last);
2226 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2227 {
2228 void *value2 = ol2->value;
2229 if (options_block != NULL)
2230 value2 = (void *)((uschar *)options_block + (long int)value2);
2231 s = *((uschar **)value2);
2232 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2233 break;
2234 }
2235 }
2236
2237 /* Else fall through */
2238
2239 case opt_gid:
2240 if (! *get_set_flag(name, oltop, last, options_block))
2241 printf("%s =\n", name);
2242 else
2243 {
2244 gr = getgrgid(*((int *)value));
2245 if (gr == NULL)
2246 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2247 else printf("%s = %s\n", name, gr->gr_name);
2248 }
2249 break;
2250
2251 case opt_uidlist:
2252 uidlist = *((uid_t **)value);
2253 printf("%s =", name);
2254 if (uidlist != NULL)
2255 {
2256 int i;
2257 uschar sep = ' ';
2258 for (i = 1; i <= (int)(uidlist[0]); i++)
2259 {
2260 uschar *name = NULL;
2261 pw = getpwuid(uidlist[i]);
2262 if (pw != NULL) name = US pw->pw_name;
2263 if (name != NULL) printf("%c%s", sep, name);
2264 else printf("%c%ld", sep, (long int)(uidlist[i]));
2265 sep = ':';
2266 }
2267 }
2268 printf("\n");
2269 break;
2270
2271 case opt_gidlist:
2272 gidlist = *((gid_t **)value);
2273 printf("%s =", name);
2274 if (gidlist != NULL)
2275 {
2276 int i;
2277 uschar sep = ' ';
2278 for (i = 1; i <= (int)(gidlist[0]); i++)
2279 {
2280 uschar *name = NULL;
2281 gr = getgrgid(gidlist[i]);
2282 if (gr != NULL) name = US gr->gr_name;
2283 if (name != NULL) printf("%c%s", sep, name);
2284 else printf("%c%ld", sep, (long int)(gidlist[i]));
2285 sep = ':';
2286 }
2287 }
2288 printf("\n");
2289 break;
2290
2291 case opt_time:
2292 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2293 break;
2294
2295 case opt_timelist:
2296 {
2297 int i;
2298 int *list = (int *)value;
2299 printf("%s = ", name);
2300 for (i = 0; i < list[1]; i++)
2301 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2302 printf("\n");
2303 }
2304 break;
2305
2306 case opt_bit:
2307 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2308 "" : "no_", name);
2309 break;
2310
2311 case opt_expand_bool:
2312 sprintf(CS name2, "*expand_%.50s", name);
2313 ol2 = find_option(name2, oltop, last);
2314 if (ol2 != NULL && ol2->value != NULL)
2315 {
2316 void *value2 = ol2->value;
2317 if (options_block != NULL)
2318 value2 = (void *)((uschar *)options_block + (long int)value2);
2319 s = *((uschar **)value2);
2320 if (s != NULL)
2321 {
2322 printf("%s = %s\n", name, string_printing(s));
2323 break;
2324 }
2325 /* s == NULL => string not set; fall through */
2326 }
2327
2328 /* Fall through */
2329
2330 case opt_bool:
2331 case opt_bool_verify:
2332 case opt_bool_set:
2333 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2334 break;
2335 }
2336 }
2337
2338
2339
2340 /*************************************************
2341 * Print value from main configuration *
2342 *************************************************/
2343
2344 /* This function, called as a result of encountering the -bP option,
2345 causes the value of any main configuration variable to be output if the
2346 second argument is NULL. There are some special values:
2347
2348 all print all main configuration options
2349 configure_file print the name of the configuration file
2350 routers print the routers' configurations
2351 transports print the transports' configuration
2352 authenticators print the authenticators' configuration
2353 router_list print a list of router names
2354 transport_list print a list of transport names
2355 authenticator_list print a list of authentication mechanism names
2356 +name print a named list item
2357 local_scan print the local_scan options
2358
2359 If the second argument is not NULL, it must be one of "router", "transport", or
2360 "authenticator" in which case the first argument identifies the driver whose
2361 options are to be printed.
2362
2363 Arguments:
2364 name option name if type == NULL; else driver name
2365 type NULL or driver type name, as described above
2366
2367 Returns: nothing
2368 */
2369
2370 void
2371 readconf_print(uschar *name, uschar *type)
2372 {
2373 BOOL names_only = FALSE;
2374 optionlist *ol;
2375 optionlist *ol2 = NULL;
2376 driver_instance *d = NULL;
2377 int size = 0;
2378
2379 if (type == NULL)
2380 {
2381 if (*name == '+')
2382 {
2383 int i;
2384 tree_node *t;
2385 BOOL found = FALSE;
2386 static uschar *types[] = { US"address", US"domain", US"host",
2387 US"localpart" };
2388 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2389 &hostlist_anchor, &localpartlist_anchor };
2390
2391 for (i = 0; i < 4; i++)
2392 {
2393 t = tree_search(*(anchors[i]), name+1);
2394 if (t != NULL)
2395 {
2396 found = TRUE;
2397 printf("%slist %s = %s\n", types[i], name+1,
2398 ((namedlist_block *)(t->data.ptr))->string);
2399 }
2400 }
2401
2402 if (!found)
2403 printf("no address, domain, host, or local part list called \"%s\" "
2404 "exists\n", name+1);
2405
2406 return;
2407 }
2408
2409 if (Ustrcmp(name, "configure_file") == 0)
2410 {
2411 printf("%s\n", CS config_main_filename);
2412 return;
2413 }
2414
2415 if (Ustrcmp(name, "all") == 0)
2416 {
2417 for (ol = optionlist_config;
2418 ol < optionlist_config + optionlist_config_size; ol++)
2419 {
2420 if ((ol->type & opt_hidden) == 0)
2421 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2422 }
2423 return;
2424 }
2425
2426 if (Ustrcmp(name, "local_scan") == 0)
2427 {
2428 #ifndef LOCAL_SCAN_HAS_OPTIONS
2429 printf("local_scan() options are not supported\n");
2430 #else
2431 for (ol = local_scan_options;
2432 ol < local_scan_options + local_scan_options_count; ol++)
2433 {
2434 print_ol(ol, US ol->name, NULL, local_scan_options,
2435 local_scan_options_count);
2436 }
2437 #endif
2438 return;
2439 }
2440
2441 if (Ustrcmp(name, "routers") == 0)
2442 {
2443 type = US"router";
2444 name = NULL;
2445 }
2446 else if (Ustrcmp(name, "transports") == 0)
2447 {
2448 type = US"transport";
2449 name = NULL;
2450 }
2451
2452 else if (Ustrcmp(name, "authenticators") == 0)
2453 {
2454 type = US"authenticator";
2455 name = NULL;
2456 }
2457
2458 else if (Ustrcmp(name, "authenticator_list") == 0)
2459 {
2460 type = US"authenticator";
2461 name = NULL;
2462 names_only = TRUE;
2463 }
2464
2465 else if (Ustrcmp(name, "router_list") == 0)
2466 {
2467 type = US"router";
2468 name = NULL;
2469 names_only = TRUE;
2470 }
2471 else if (Ustrcmp(name, "transport_list") == 0)
2472 {
2473 type = US"transport";
2474 name = NULL;
2475 names_only = TRUE;
2476 }
2477 else
2478 {
2479 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2480 name, NULL, optionlist_config, optionlist_config_size);
2481 return;
2482 }
2483 }
2484
2485 /* Handle the options for a router or transport. Skip options that are flagged
2486 as hidden. Some of these are options with names starting with '*', used for
2487 internal alternative representations of other options (which the printing
2488 function will sort out). Others are synonyms kept for backward compatibility.
2489 */
2490
2491 if (Ustrcmp(type, "router") == 0)
2492 {
2493 d = (driver_instance *)routers;
2494 ol2 = optionlist_routers;
2495 size = optionlist_routers_size;
2496 }
2497 else if (Ustrcmp(type, "transport") == 0)
2498 {
2499 d = (driver_instance *)transports;
2500 ol2 = optionlist_transports;
2501 size = optionlist_transports_size;
2502 }
2503 else if (Ustrcmp(type, "authenticator") == 0)
2504 {
2505 d = (driver_instance *)auths;
2506 ol2 = optionlist_auths;
2507 size = optionlist_auths_size;
2508 }
2509
2510 if (names_only)
2511 {
2512 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2513 return;
2514 }
2515
2516 /* Either search for a given driver, or print all of them */
2517
2518 for (; d != NULL; d = d->next)
2519 {
2520 if (name == NULL)
2521 printf("\n%s %s:\n", d->name, type);
2522 else if (Ustrcmp(d->name, name) != 0) continue;
2523
2524 for (ol = ol2; ol < ol2 + size; ol++)
2525 {
2526 if ((ol->type & opt_hidden) == 0)
2527 print_ol(ol, US ol->name, d, ol2, size);
2528 }
2529
2530 for (ol = d->info->options;
2531 ol < d->info->options + *(d->info->options_count); ol++)
2532 {
2533 if ((ol->type & opt_hidden) == 0)
2534 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2535 }
2536 if (name != NULL) return;
2537 }
2538 if (name != NULL) printf("%s %s not found\n", type, name);
2539 }
2540
2541
2542
2543 /*************************************************
2544 * Read a named list item *
2545 *************************************************/
2546
2547 /* This function reads a name and a list (i.e. string). The name is used to
2548 save the list in a tree, sorted by its name. Each entry also has a number,
2549 which can be used for caching tests, but if the string contains any expansion
2550 items other than $key, the number is set negative to inhibit caching. This
2551 mechanism is used for domain, host, and address lists that are referenced by
2552 the "+name" syntax.
2553
2554 Arguments:
2555 anchorp points to the tree anchor
2556 numberp points to the current number for this tree
2557 max the maximum number permitted
2558 s the text of the option line, starting immediately after the name
2559 of the list type
2560 tname the name of the list type, for messages
2561
2562 Returns: nothing
2563 */
2564
2565 static void
2566 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2567 uschar *tname)
2568 {
2569 BOOL forcecache = FALSE;
2570 uschar *ss;
2571 tree_node *t;
2572 namedlist_block *nb = store_get(sizeof(namedlist_block));
2573
2574 if (Ustrncmp(s, "_cache", 6) == 0)
2575 {
2576 forcecache = TRUE;
2577 s += 6;
2578 }
2579
2580 if (!isspace(*s))
2581 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2582
2583 if (*numberp >= max)
2584 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2585 tname, max);
2586
2587 while (isspace(*s)) s++;
2588 ss = s;
2589 while (isalnum(*s) || *s == '_') s++;
2590 t = store_get(sizeof(tree_node) + s-ss);
2591 Ustrncpy(t->name, ss, s-ss);
2592 t->name[s-ss] = 0;
2593 while (isspace(*s)) s++;
2594
2595 if (!tree_insertnode(anchorp, t))
2596 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2597 "duplicate name \"%s\" for a named %s", t->name, tname);
2598
2599 t->data.ptr = nb;
2600 nb->number = *numberp;
2601 *numberp += 1;
2602
2603 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2604 "missing '=' after \"%s\"", t->name);
2605 while (isspace(*s)) s++;
2606 nb->string = read_string(s, t->name);
2607 nb->cache_data = NULL;
2608
2609 /* Check the string for any expansions; if any are found, mark this list
2610 uncacheable unless the user has explicited forced caching. */
2611
2612 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2613 }
2614
2615
2616
2617
2618 /*************************************************
2619 * Unpick data for a rate limit *
2620 *************************************************/
2621
2622 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2623 separate values.
2624
2625 Arguments:
2626 s string, in the form t,b,f,l
2627 where t is the threshold (integer)
2628 b is the initial delay (time)
2629 f is the multiplicative factor (fixed point)
2630 k is the maximum time (time)
2631 threshold where to store threshold
2632 base where to store base in milliseconds
2633 factor where to store factor in milliseconds
2634 limit where to store limit
2635
2636 Returns: nothing (panics on error)
2637 */
2638
2639 static void
2640 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2641 int *limit)
2642 {
2643 uschar bstring[16], lstring[16];
2644
2645 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2646 factor, lstring) == 4)
2647 {
2648 *base = readconf_readtime(bstring, 0, TRUE);
2649 *limit = readconf_readtime(lstring, 0, TRUE);
2650 if (*base >= 0 && *limit >= 0) return;
2651 }
2652 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2653 }
2654
2655
2656
2657
2658 /*************************************************
2659 * Read main configuration options *
2660 *************************************************/
2661
2662 /* This function is the first to be called for configuration reading. It
2663 opens the configuration file and reads general configuration settings until
2664 it reaches the end of the configuration section. The file is then left open so
2665 that the remaining configuration data can subsequently be read if needed for
2666 this run of Exim.
2667
2668 The configuration file must be owned either by root or exim, and be writeable
2669 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2670 in the config file, so the test is done on the compiled in values. A slight
2671 anomaly, to be carefully documented.
2672
2673 The name of the configuration file is taken from a list that is included in the
2674 binary of Exim. It can be altered from the command line, but if that is done,
2675 root privilege is immediately withdrawn unless the caller is root or exim.
2676 The first file on the list that exists is used.
2677
2678 For use on multiple systems that share file systems, first look for a
2679 configuration file whose name has the current node name on the end. If that is
2680 not found, try the generic name. For really contorted configurations, that run
2681 multiple Exims with different uid settings, first try adding the effective uid
2682 before the node name. These complications are going to waste resources on most
2683 systems. Therefore they are available only when requested by compile-time
2684 options. */
2685
2686 void
2687 readconf_main(void)
2688 {
2689 int sep = 0;
2690 struct stat statbuf;
2691 uschar *s, *filename;
2692 uschar *list = config_main_filelist;
2693
2694 /* Loop through the possible file names */
2695
2696 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2697 != NULL)
2698 {
2699 /* Cut out all the fancy processing unless specifically wanted */
2700
2701 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2702 uschar *suffix = filename + Ustrlen(filename);
2703
2704 /* Try for the node-specific file if a node name exists */
2705
2706 #ifdef CONFIGURE_FILE_USE_NODE
2707 struct utsname uts;
2708 if (uname(&uts) >= 0)
2709 {
2710 #ifdef CONFIGURE_FILE_USE_EUID
2711 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2712 config_file = Ufopen(filename, "rb");
2713 if (config_file == NULL)
2714 #endif /* CONFIGURE_FILE_USE_EUID */
2715 {
2716 sprintf(CS suffix, ".%.256s", uts.nodename);
2717 config_file = Ufopen(filename, "rb");
2718 }
2719 }
2720 #endif /* CONFIGURE_FILE_USE_NODE */
2721
2722 /* Otherwise, try the generic name, possibly with the euid added */
2723
2724 #ifdef CONFIGURE_FILE_USE_EUID
2725 if (config_file == NULL)
2726 {
2727 sprintf(CS suffix, ".%ld", (long int)original_euid);
2728 config_file = Ufopen(filename, "rb");
2729 }
2730 #endif /* CONFIGURE_FILE_USE_EUID */
2731
2732 /* Finally, try the unadorned name */
2733
2734 if (config_file == NULL)
2735 {
2736 *suffix = 0;
2737 config_file = Ufopen(filename, "rb");
2738 }
2739 #else /* if neither defined */
2740
2741 /* This is the common case when the fancy processing is not included. */
2742
2743 config_file = Ufopen(filename, "rb");
2744 #endif
2745
2746 /* If the file does not exist, continue to try any others. For any other
2747 error, break out (and die). */
2748
2749 if (config_file != NULL || errno != ENOENT) break;
2750 }
2751
2752 /* On success, save the name for verification; config_filename is used when
2753 logging configuration errors (it changes for .included files) whereas
2754 config_main_filename is the name shown by -bP. Failure to open a configuration
2755 file is a serious disaster. */
2756
2757 if (config_file != NULL)
2758 {
2759 config_filename = config_main_filename = string_copy(filename);
2760 }
2761 else
2762 {
2763 if (filename == NULL)
2764 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2765 "%s", config_main_filelist);
2766 else
2767 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2768 "configuration file %s", filename));
2769 }
2770
2771 /* Check the status of the file we have opened, unless it was specified on
2772 the command line, in which case privilege was given away at the start. */
2773
2774 if (!config_changed)
2775 {
2776 if (fstat(fileno(config_file), &statbuf) != 0)
2777 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2778 big_buffer);
2779
2780 if ((statbuf.st_uid != root_uid && /* owner not root */
2781 statbuf.st_uid != exim_uid /* owner not exim */
2782 #ifdef CONFIGURE_OWNER
2783 && statbuf.st_uid != config_uid /* owner not the special one */
2784 #endif
2785 ) || /* or */
2786 (statbuf.st_gid != exim_gid /* group not exim & */
2787 #ifdef CONFIGURE_GROUP
2788 && statbuf.st_gid != config_gid /* group not the special one */
2789 #endif
2790 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2791 /* or */
2792 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2793
2794 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2795 "wrong owner, group, or mode", big_buffer);
2796 }
2797
2798 /* Process the main configuration settings. They all begin with a lower case
2799 letter. If we see something starting with an upper case letter, it is taken as
2800 a macro definition. */
2801
2802 while ((s = get_config_line()) != NULL)
2803 {
2804 if (isupper(s[0])) read_macro_assignment(s);
2805
2806 else if (Ustrncmp(s, "domainlist", 10) == 0)
2807 read_named_list(&domainlist_anchor, &domainlist_count,
2808 MAX_NAMED_LIST, s+10, US"domain list");
2809
2810 else if (Ustrncmp(s, "hostlist", 8) == 0)
2811 read_named_list(&hostlist_anchor, &hostlist_count,
2812 MAX_NAMED_LIST, s+8, US"host list");
2813
2814 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2815 read_named_list(&addresslist_anchor, &addresslist_count,
2816 MAX_NAMED_LIST, s+11, US"address list");
2817
2818 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2819 read_named_list(&localpartlist_anchor, &localpartlist_count,
2820 MAX_NAMED_LIST, s+13, US"local part list");
2821
2822 else
2823 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2824 NULL, US"main option \"%s\" unknown");
2825 }
2826
2827
2828 /* If local_sender_retain is set, local_from_check must be unset. */
2829
2830 if (local_sender_retain && local_from_check)
2831 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2832 "local_sender_retain are set; this combination is not allowed");
2833
2834 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2835 wanted. */
2836
2837 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2838
2839 /* The max retry interval must not be greater than 24 hours. */
2840
2841 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2842
2843 /* remote_max_parallel must be > 0 */
2844
2845 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2846
2847 /* Save the configured setting of freeze_tell, so we can re-instate it at the
2848 start of a new SMTP message. */
2849
2850 freeze_tell_config = freeze_tell;
2851
2852 /* The primary host name may be required for expansion of spool_directory
2853 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2854 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2855 canonize it. Some people like upper case letters in their host names, so we
2856 don't force the case. */
2857
2858 if (primary_hostname == NULL)
2859 {
2860 uschar *hostname;
2861 struct utsname uts;
2862 if (uname(&uts) < 0)
2863 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2864 hostname = US uts.nodename;
2865
2866 if (Ustrchr(hostname, '.') == NULL)
2867 {
2868 int af = AF_INET;
2869 struct hostent *hostdata;
2870
2871 #if HAVE_IPV6
2872 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2873 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2874 TRUE, NULL) != OK))
2875 af = AF_INET6;
2876 #else
2877 af = AF_INET;
2878 #endif
2879
2880 for (;;)
2881 {
2882 #if HAVE_IPV6
2883 #if HAVE_GETIPNODEBYNAME
2884 int error_num;
2885 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2886 #else
2887 hostdata = gethostbyname2(CS hostname, af);
2888 #endif
2889 #else
2890 hostdata = gethostbyname(CS hostname);
2891 #endif
2892
2893 if (hostdata != NULL)
2894 {
2895 hostname = US hostdata->h_name;
2896 break;
2897 }
2898
2899 if (af == AF_INET) break;
2900 af = AF_INET;
2901 }
2902 }
2903
2904 primary_hostname = string_copy(hostname);
2905 }
2906
2907 /* Set up default value for smtp_active_hostname */
2908
2909 smtp_active_hostname = primary_hostname;
2910
2911 /* If spool_directory wasn't set in the build-time configuration, it must have
2912 got set above. Of course, writing to the log may not work if log_file_path is
2913 not set, but it will at least get to syslog or somewhere, with any luck. */
2914
2915 if (*spool_directory == 0)
2916 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2917 "proceed");
2918
2919 /* Expand the spool directory name; it may, for example, contain the primary
2920 host name. Same comment about failure. */
2921
2922 s = expand_string(spool_directory);
2923 if (s == NULL)
2924 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2925 "\"%s\": %s", spool_directory, expand_string_message);
2926 spool_directory = s;
2927
2928 /* Expand log_file_path, which must contain "%s" in any component that isn't
2929 the null string or "syslog". It is also allowed to contain one instance of %D.
2930 However, it must NOT contain % followed by anything else. */
2931
2932 if (*log_file_path != 0)
2933 {
2934 uschar *ss, *sss;
2935 int sep = ':'; /* Fixed for log file path */
2936 s = expand_string(log_file_path);
2937 if (s == NULL)
2938 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2939 "\"%s\": %s", log_file_path, expand_string_message);
2940
2941 ss = s;
2942 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2943 {
2944 uschar *t;
2945 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2946 t = Ustrstr(sss, "%s");
2947 if (t == NULL)
2948 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2949 "contain \"%%s\"", sss);
2950 *t = 'X';
2951 t = Ustrchr(sss, '%');
2952 if (t != NULL)
2953 {
2954 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2955 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2956 "unexpected \"%%\" character", s);
2957 }
2958 }
2959
2960 log_file_path = s;
2961 }
2962
2963 /* Interpret syslog_facility into an integer argument for 'ident' param to
2964 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2965 leading "log_". */
2966
2967 if (syslog_facility_str != NULL)
2968 {
2969 int i;
2970 uschar *s = syslog_facility_str;
2971
2972 if ((Ustrlen(syslog_facility_str) >= 4) &&
2973 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2974 s += 4;
2975
2976 for (i = 0; i < syslog_list_size; i++)
2977 {
2978 if (strcmpic(s, syslog_list[i].name) == 0)
2979 {
2980 syslog_facility = syslog_list[i].value;
2981 break;
2982 }
2983 }
2984
2985 if (i >= syslog_list_size)
2986 {
2987 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2988 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2989 }
2990 }
2991
2992 /* Expand pid_file_path */
2993
2994 if (*pid_file_path != 0)
2995 {
2996 s = expand_string(pid_file_path);
2997 if (s == NULL)
2998 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2999 "\"%s\": %s", pid_file_path, expand_string_message);
3000 pid_file_path = s;
3001 }
3002
3003 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3004 message. */
3005
3006 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3007
3008 /* Unpick the SMTP rate limiting options, if set */
3009
3010 if (smtp_ratelimit_mail != NULL)
3011 {
3012 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3013 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3014 }
3015
3016 if (smtp_ratelimit_rcpt != NULL)
3017 {
3018 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3019 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3020 }
3021
3022 /* The qualify domains default to the primary host name */
3023
3024 if (qualify_domain_sender == NULL)
3025 qualify_domain_sender = primary_hostname;
3026 if (qualify_domain_recipient == NULL)
3027 qualify_domain_recipient = qualify_domain_sender;
3028
3029 /* Setting system_filter_user in the configuration sets the gid as well if a
3030 name is given, but a numerical value does not. */
3031
3032 if (system_filter_uid_set && !system_filter_gid_set)
3033 {
3034 struct passwd *pw = getpwuid(system_filter_uid);
3035 if (pw == NULL)
3036 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3037 (long int)system_filter_uid);
3038 system_filter_gid = pw->pw_gid;
3039 system_filter_gid_set = TRUE;
3040 }
3041
3042 /* If the errors_reply_to field is set, check that it is syntactically valid
3043 and ensure it contains a domain. */
3044
3045 if (errors_reply_to != NULL)
3046 {
3047 uschar *errmess;
3048 int start, end, domain;
3049 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3050 &start, &end, &domain, FALSE);
3051
3052 if (recipient == NULL)
3053 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3054 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3055
3056 if (domain == 0)
3057 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3058 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3059 }
3060
3061 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3062 smtp_accept_max must also be set. */
3063
3064 if (smtp_accept_max == 0 &&
3065 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3066 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3067 "smtp_accept_max must be set if smtp_accept_queue or "
3068 "smtp_accept_max_per_host is set");
3069
3070 /* Set up the host number if anything is specified. It is an expanded string
3071 so that it can be computed from the host name, for example. We do this last
3072 so as to ensure that everything else is set up before the expansion. */
3073
3074 if (host_number_string != NULL)
3075 {
3076 uschar *end;
3077 uschar *s = expand_string(host_number_string);
3078 long int n = Ustrtol(s, &end, 0);
3079 while (isspace(*end)) end++;
3080 if (*end != 0)
3081 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3082 "localhost_number value is not a number: %s", s);
3083 if (n > LOCALHOST_MAX)
3084 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3085 "localhost_number is greater than the maximum allowed value (%d)",
3086 LOCALHOST_MAX);
3087 host_number = n;
3088 }
3089
3090 #ifdef SUPPORT_TLS
3091 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3092
3093 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3094 tls_verify_certificates == NULL)
3095 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3096 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3097 (tls_verify_hosts != NULL)? "" : "try_");
3098 #endif
3099 }
3100
3101
3102
3103 /*************************************************
3104 * Initialize one driver *
3105 *************************************************/
3106
3107 /* This is called once the driver's generic options, if any, have been read.
3108 We can now find the driver, set up defaults for the private options, and
3109 unset any "set" bits in the private options table (which might have been
3110 set by another incarnation of the same driver).
3111
3112 Arguments:
3113 d pointer to driver instance block, with generic
3114 options filled in
3115 drivers_available vector of available drivers
3116 size_of_info size of each block in drivers_available
3117 class class of driver, for error message
3118
3119 Returns: pointer to the driver info block
3120 */
3121
3122 static driver_info *
3123 init_driver(driver_instance *d, driver_info *drivers_available,
3124 int size_of_info, uschar *class)
3125 {
3126 driver_info *dd;
3127
3128 for (dd = drivers_available; dd->driver_name[0] != 0;
3129 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3130 {
3131 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3132 {
3133 int i;
3134 int len = dd->options_len;
3135 d->info = dd;
3136 d->options_block = store_get(len);
3137 memcpy(d->options_block, dd->options_block, len);
3138 for (i = 0; i < *(dd->options_count); i++)
3139 dd->options[i].type &= ~opt_set;
3140 return dd;
3141 }
3142 }
3143
3144 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3145 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3146
3147 return NULL; /* never obeyed */
3148 }
3149
3150
3151
3152
3153 /*************************************************
3154 * Initialize driver list *
3155 *************************************************/
3156
3157 /* This function is called for routers, transports, and authentication
3158 mechanisms. It reads the data from the current point in the configuration file
3159 up to the end of the section, and sets up a chain of instance blocks according
3160 to the file's contents. The file will already have been opened by a call to
3161 readconf_main, and must be left open for subsequent reading of further data.
3162
3163 Any errors cause a panic crash. Note that the blocks with names driver_info and
3164 driver_instance must map the first portions of all the _info and _instance
3165 blocks for this shared code to work.
3166
3167 Arguments:
3168 class "router", "transport", or "authenticator"
3169 anchor &routers, &transports, &auths
3170 drivers_available available drivers
3171 size_of_info size of each info block
3172 instance_default points to default data for an instance
3173 instance_size size of instance block
3174 driver_optionlist generic option list
3175 driver_optionlist_count count of generic option list
3176
3177 Returns: nothing
3178 */
3179
3180 void
3181 readconf_driver_init(
3182 uschar *class,
3183 driver_instance **anchor,
3184 driver_info *drivers_available,
3185 int size_of_info,
3186 void *instance_default,
3187 int instance_size,
3188 optionlist *driver_optionlist,
3189 int driver_optionlist_count)
3190 {
3191 driver_instance **p = anchor;
3192 driver_instance *d = NULL;
3193 uschar *buffer;
3194
3195 while ((buffer = get_config_line()) != NULL)
3196 {
3197 uschar name[64];
3198 uschar *s;
3199
3200 /* Read the first name on the line and test for the start of a new driver. A
3201 macro definition indicates the end of the previous driver. If this isn't the
3202 start of a new driver, the line will be re-read. */
3203
3204 s = readconf_readname(name, sizeof(name), buffer);
3205
3206 /* Handle macro definition, first finishing off the initialization of the
3207 previous driver, if any. */
3208
3209 if (isupper(*name) && *s == '=')
3210 {
3211 if (d != NULL)
3212 {
3213 if (d->driver_name == NULL)
3214 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3215 "no driver defined for %s \"%s\"", class, d->name);
3216 (d->info->init)(d);
3217 d = NULL;
3218 }
3219 read_macro_assignment(buffer);
3220 continue;
3221 }
3222
3223 /* If the line starts with a name terminated by a colon, we are at the
3224 start of the definition of a new driver. The rest of the line must be
3225 blank. */
3226
3227 if (*s++ == ':')
3228 {
3229 int i;
3230
3231 /* Finish off initializing the previous driver. */
3232
3233 if (d != NULL)
3234 {
3235 if (d->driver_name == NULL)
3236 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3237 "no driver defined for %s \"%s\"", class, d->name);
3238 (d->info->init)(d);
3239 }
3240
3241 /* Check that we haven't already got a driver of this name */
3242
3243 for (d = *anchor; d != NULL; d = d->next)
3244 if (Ustrcmp(name, d->name) == 0)
3245 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3246 "there are two %ss called \"%s\"", class, name);
3247
3248 /* Set up a new driver instance data block on the chain, with
3249 its default values installed. */
3250
3251 d = store_get(instance_size);
3252 memcpy(d, instance_default, instance_size);
3253 *p = d;
3254 p = &(d->next);
3255 d->name = string_copy(name);
3256
3257 /* Clear out the "set" bits in the generic options */
3258
3259 for (i = 0; i < driver_optionlist_count; i++)
3260 driver_optionlist[i].type &= ~opt_set;
3261
3262 /* Check nothing more on this line, then do the next loop iteration. */
3263
3264 while (isspace(*s)) s++;
3265 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3266 continue;
3267 }
3268
3269 /* Not the start of a new driver. Give an error if we have not set up a
3270 current driver yet. */
3271
3272 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3273 "%s name missing", class);
3274
3275 /* First look to see if this is a generic option; if it is "driver",
3276 initialize the driver. If is it not a generic option, we can look for a
3277 private option provided that the driver has been previously set up. */
3278
3279 if (readconf_handle_option(buffer, driver_optionlist,
3280 driver_optionlist_count, d, NULL))
3281 {
3282 if (d->info == NULL && d->driver_name != NULL)
3283 init_driver(d, drivers_available, size_of_info, class);
3284 }
3285
3286 /* Handle private options - pass the generic block because some may
3287 live therein. A flag with each option indicates if it is in the public
3288 block. */
3289
3290 else if (d->info != NULL)
3291 {
3292 readconf_handle_option(buffer, d->info->options,
3293 *(d->info->options_count), d, US"option \"%s\" unknown");
3294 }
3295
3296 /* The option is not generic and the driver name has not yet been given. */
3297
3298 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3299 "(\"driver\" must be specified before any private options)", name);
3300 }
3301
3302 /* Run the initialization function for the final driver. */
3303
3304 if (d != NULL)
3305 {
3306 if (d->driver_name == NULL)
3307 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3308 "no driver defined for %s \"%s\"", class, d->name);
3309 (d->info->init)(d);
3310 }
3311 }
3312
3313
3314
3315 /*************************************************
3316 * Check driver dependency *
3317 *************************************************/
3318
3319 /* This function is passed a driver instance and a string. It checks whether
3320 any of the string options for the driver contains the given string as an
3321 expansion variable.
3322
3323 Arguments:
3324 d points to a driver instance block
3325 s the string to search for
3326
3327 Returns: TRUE if a dependency is found
3328 */
3329
3330 BOOL
3331 readconf_depends(driver_instance *d, uschar *s)
3332 {
3333 int count = *(d->info->options_count);
3334 optionlist *ol;
3335 uschar *ss;
3336
3337 for (ol = d->info->options; ol < d->info->options + count; ol++)
3338 {
3339 void *options_block;
3340 uschar *value;
3341 int type = ol->type & opt_mask;
3342 if (type != opt_stringptr) continue;
3343 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3344 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3345 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3346 {
3347 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3348 isalnum(ss[Ustrlen(s)])) continue;
3349 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3350 d->name, ol->name, s);
3351 return TRUE;
3352 }
3353 }
3354
3355 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3356 return FALSE;
3357 }
3358
3359
3360
3361
3362 /*************************************************
3363 * Decode an error type for retries *
3364 *************************************************/
3365
3366 /* This function is global because it is also called from the main
3367 program when testing retry information. It decodes strings such as "quota_7d"
3368 into numerical error codes.
3369
3370 Arguments:
3371 pp points to start of text
3372 p points past end of text
3373 basic_errno points to an int to receive the main error number
3374 more_errno points to an int to receive the secondary error data
3375
3376 Returns: NULL if decoded correctly; else points to error text
3377 */
3378
3379 uschar *
3380 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3381 {
3382 int len;
3383 uschar *q = pp;
3384 while (q < p && *q != '_') q++;
3385 len = q - pp;
3386
3387 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3388 {
3389 *basic_errno = ERRNO_EXIMQUOTA;
3390 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3391 return US"bad time value";
3392 }
3393
3394 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3395 {
3396 *basic_errno = ECONNREFUSED;
3397 if (q != p)
3398 {
3399 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3400 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3401 else return US"A or MX expected after \"refused\"";
3402 }
3403 }
3404
3405 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3406 {
3407 *basic_errno = ETIMEDOUT;
3408 if (q != p)
3409 {
3410 int i;
3411 int xlen = p - q - 1;
3412 uschar *x = q + 1;
3413
3414 static uschar *extras[] =
3415 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3416 static int values[] =
3417 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3418
3419 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3420 {
3421 if (strncmpic(x, extras[i], xlen) == 0)
3422 {
3423 *more_errno = values[i];
3424 break;
3425 }
3426 }
3427
3428 if (i >= sizeof(extras)/sizeof(uschar *))
3429 {
3430 if (strncmpic(x, US"DNS", xlen) == 0)
3431 {
3432 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3433 "available in retry rules (it has never worked) - treated as "
3434 "\"timeout\"");
3435 }
3436 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3437 }
3438 }
3439 }
3440
3441 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3442 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3443 strncmpic(pp, US"data_4", 6) == 0)
3444 {
3445 BOOL bad = FALSE;
3446 int x = 255; /* means "any 4xx code" */
3447 if (p != pp + 8) bad = TRUE; else
3448 {
3449 int a = pp[6], b = pp[7];
3450 if (isdigit(a))
3451 {
3452 x = (a - '0') * 10;
3453 if (isdigit(b)) x += b - '0';
3454 else if (b == 'x') x += 100;
3455 else bad = TRUE;
3456 }
3457 else if (a != 'x' || b != 'x') bad = TRUE;
3458 }
3459
3460 if (bad)
3461 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3462 "x is literal and d is any digit", pp);
3463
3464 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3465 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3466 *more_errno = x << 8;
3467 }
3468
3469 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3470 strncmpic(q+1, US"failed", p-q-1) == 0)
3471 *basic_errno = ERRNO_AUTHFAIL;
3472
3473 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3474 *basic_errno = ERRNO_SMTPCLOSED;
3475
3476 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3477 *basic_errno = ERRNO_TLSREQUIRED;
3478
3479 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3480 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3481
3482 return NULL;
3483 }
3484
3485
3486
3487
3488 /*************************************************
3489 * Read retry information *
3490 *************************************************/
3491
3492 /* Each line of retry information contains:
3493
3494 . A domain name pattern or an address pattern;
3495
3496 . An error name, possibly with additional data, or *;
3497
3498 . An optional sequence of retry items, each consisting of an identifying
3499 letter, a cutoff time, and optional parameters.
3500
3501 All this is decoded and placed into a control block. */
3502
3503
3504 /* Subroutine to read an argument, preceded by a comma and terminated
3505 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3506 1 = fixed point number (returned *1000).
3507
3508 Arguments:
3509 paddr pointer to pointer to current character; updated
3510 type 0 => read a time; 1 => read a fixed point number
3511
3512 Returns: time in seconds or fixed point number * 1000
3513 */
3514
3515 static int
3516 retry_arg(uschar **paddr, int type)
3517 {
3518 uschar *p = *paddr;
3519 uschar *pp;
3520
3521 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3522
3523 while (isspace(*p)) p++;
3524 pp = p;
3525 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3526
3527 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3528 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3529
3530 *paddr = p;
3531 switch (type)
3532 {
3533 case 0:
3534 return readconf_readtime(pp, *p, FALSE);
3535 case 1:
3536 return readconf_readfixed(pp, *p);
3537 }
3538 return 0; /* Keep picky compilers happy */
3539 }
3540
3541 /* The function proper */
3542
3543 void
3544 readconf_retries(void)
3545 {
3546 retry_config **chain = &retries;
3547 retry_config *next;
3548 uschar *p;
3549
3550 while ((p = get_config_line()) != NULL)
3551 {
3552 retry_rule **rchain;
3553 uschar *pp, *error;
3554
3555 next = store_get(sizeof(retry_config));
3556 next->next = NULL;
3557 *chain = next;
3558 chain = &(next->next);
3559 next->basic_errno = next->more_errno = 0;
3560 next->senders = NULL;
3561 next->rules = NULL;
3562 rchain = &(next->rules);
3563
3564 next->pattern = string_dequote(&p);
3565 while (isspace(*p)) p++;
3566 pp = p;
3567 while (mac_isgraph(*p)) p++;
3568 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3569 "missing error type");
3570
3571 /* Test error names for things we understand. */
3572
3573 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3574 &(next->more_errno))) != NULL)
3575 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3576
3577 /* There may be an optional address list of senders to be used as another
3578 constraint on the rule. This was added later, so the syntax is a bit of a
3579 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3580 an address list. */
3581
3582 while (isspace(*p)) p++;
3583 if (Ustrncmp(p, "senders", 7) == 0)
3584 {
3585 p += 7;
3586 while (isspace(*p)) p++;
3587 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3588 "\"=\" expected after \"senders\" in retry rule");
3589 while (isspace(*p)) p++;
3590 next->senders = string_dequote(&p);
3591 }
3592
3593 /* Now the retry rules. Keep the maximum timeout encountered. */
3594
3595 while (isspace(*p)) p++;
3596
3597 while (*p != 0)
3598 {
3599 retry_rule *rule = store_get(sizeof(retry_rule));
3600 *rchain = rule;
3601 rchain = &(rule->next);
3602 rule->next = NULL;
3603 rule->rule = toupper(*p++);
3604 rule->timeout = retry_arg(&p, 0);
3605 if (rule->timeout > retry_maximum_timeout)
3606 retry_maximum_timeout = rule->timeout;
3607
3608 switch (rule->rule)
3609 {
3610 case 'F': /* Fixed interval */
3611 rule->p1 = retry_arg(&p, 0);
3612 break;
3613
3614 case 'G': /* Geometrically increasing intervals */
3615 case 'H': /* Ditto, but with randomness */
3616 rule->p1 = retry_arg(&p, 0);
3617 rule->p2 = retry_arg(&p, 1);
3618 break;
3619
3620 default:
3621 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3622 break;
3623 }
3624
3625 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3626 (rule->rule != 'F' && rule->p2 < 1000))
3627 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3628 "bad parameters for retry rule");
3629
3630 while (isspace(*p)) p++;
3631 if (*p == ';')
3632 {
3633 p++;
3634 while (isspace(*p)) p++;
3635 }
3636 else if (*p != 0)
3637 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3638 }
3639 }
3640 }
3641
3642
3643
3644 /*************************************************
3645 * Initialize authenticators *
3646 *************************************************/
3647
3648 /* Read the authenticators section of the configuration file.
3649
3650 Arguments: none
3651 Returns: nothing
3652 */
3653
3654 static void
3655 auths_init(void)
3656 {
3657 auth_instance *au, *bu;
3658 readconf_driver_init(US"authenticator",
3659 (driver_instance **)(&auths), /* chain anchor */
3660 (driver_info *)auths_available, /* available drivers */
3661 sizeof(auth_info), /* size of info block */
3662 &auth_defaults, /* default values for generic options */
3663 sizeof(auth_instance), /* size of instance block */
3664 optionlist_auths, /* generic options */
3665 optionlist_auths_size);
3666
3667 for (au = auths; au != NULL; au = au->next)
3668 {
3669 if (au->public_name == NULL)
3670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3671 "the %s authenticator", au->name);
3672 for (bu = au->next; bu != NULL; bu = bu->next)
3673 {
3674 if (strcmpic(au->public_name, bu->public_name) == 0)
3675 {
3676 if ((au->client && bu->client) || (au->server && bu->server))
3677 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3678 "(%s and %s) have the same public name (%s)",
3679 (au->client)? US"client" : US"server", au->name, bu->name,
3680 au->public_name);
3681 }
3682 }
3683 }
3684 }
3685
3686
3687
3688
3689 /*************************************************
3690 * Read ACL information *
3691 *************************************************/
3692
3693 /* If this run of Exim is not doing something that involves receiving a
3694 message, we can just skip over the ACL information. No need to parse it.
3695
3696 First, we have a function for acl_read() to call back to get the next line. We
3697 need to remember the line we passed, because at the end it will contain the
3698 name of the next ACL. */
3699
3700 static uschar *acl_line;
3701
3702 static uschar *
3703 acl_callback(void)
3704 {
3705 acl_line = get_config_line();
3706 return acl_line;
3707 }
3708
3709
3710 /* Now the main function:
3711
3712 Arguments:
3713 skip TRUE when this Exim process is doing something that will
3714 not need the ACL data
3715
3716 Returns: nothing
3717 */
3718
3719 static void
3720 readconf_acl(BOOL skip)
3721 {
3722 uschar *p;
3723
3724 /* Not receiving messages, don't need to parse the ACL data */
3725
3726 if (skip)
3727 {
3728 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3729 while ((p = get_config_line()) != NULL);
3730 return;
3731 }
3732
3733 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3734 between ACLs. */
3735
3736 acl_line = get_config_line();
3737
3738 while(acl_line != NULL)
3739 {
3740 uschar name[64];
3741 tree_node *node;
3742 uschar *error;
3743
3744 p = readconf_readname(name, sizeof(name), acl_line);
3745 if (isupper(*name) && *p == '=')
3746 {
3747 read_macro_assignment(acl_line);
3748 acl_line = get_config_line();
3749 continue;
3750 }
3751
3752 if (*p != ':' || name[0] == 0)
3753 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3754
3755 node = store_get(sizeof(tree_node) + Ustrlen(name));
3756 Ustrcpy(node->name, name);
3757 if (!tree_insertnode(&acl_anchor, node))
3758 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3759 "there are two ACLs called \"%s\"", name);
3760
3761 node->data.ptr = acl_read(acl_callback, &error);
3762
3763 if (node->data.ptr == NULL && error != NULL)
3764 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3765 }
3766 }
3767
3768
3769
3770 /*************************************************
3771 * Read configuration for local_scan() *
3772 *************************************************/
3773
3774 /* This function is called after "begin local_scan" is encountered in the
3775 configuration file. If the local_scan() function allows for configuration
3776 options, we can process them. Otherwise, we expire in a panic.
3777
3778 Arguments: none
3779 Returns: nothing
3780 */
3781
3782 static void
3783 local_scan_init(void)
3784 {
3785 #ifndef LOCAL_SCAN_HAS_OPTIONS
3786 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3787 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3788 #else
3789
3790 uschar *p;
3791 while ((p = get_config_line()) != NULL)
3792 {
3793 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3794 NULL, US"local_scan option \"%s\" unknown");
3795 }
3796 #endif
3797 }
3798
3799
3800
3801 /*************************************************
3802 * Read rest of configuration (after main) *
3803 *************************************************/
3804
3805 /* This function reads the rest of the runtime configuration, after the main
3806 configuration. It is called only when actually needed. Each subsequent section
3807 of the configuration starts with a line of the form
3808
3809 begin name
3810
3811 where the name is "routers", "transports", etc. A section is terminated by
3812 hitting the next "begin" line, and the next name is left in next_section.
3813 Because it may confuse people as to whether the names are singular or plural,
3814 we add "s" if it's missing. There is always enough room in next_section for
3815 this. This function is basically just a switch.
3816
3817 Arguments:
3818 skip_acl TRUE if ACL information is not needed
3819
3820 Returns: nothing
3821 */
3822
3823 static uschar *section_list[] = {
3824 US"acls",
3825 US"authenticators",
3826 US"local_scans",
3827 US"retrys",
3828 US"rewrites",
3829 US"routers",
3830 US"transports"};
3831
3832 void
3833 readconf_rest(BOOL skip_acl)
3834 {
3835 int had = 0;
3836
3837 while(next_section[0] != 0)
3838 {
3839 int bit;
3840 int first = 0;
3841 int last = sizeof(section_list) / sizeof(uschar *);
3842 int mid = last/2;
3843 int n = Ustrlen(next_section);
3844
3845 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3846
3847 for (;;)
3848 {
3849 int c = strcmpic(next_section, section_list[mid]);
3850 if (c == 0) break;
3851 if (c > 0) first = mid + 1; else last = mid;
3852 if (first >= last)
3853 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3854 "\"%.*s\" is not a known configuration section name", n, next_section);
3855 mid = (last + first)/2;
3856 }
3857
3858 bit = 1 << mid;
3859 if (((had ^= bit) & bit) == 0)
3860 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3861 "\"%.*s\" section is repeated in the configuration file", n,
3862 next_section);
3863
3864 switch(mid)
3865 {
3866 case 0: readconf_acl(skip_acl); break;
3867 case 1: auths_init(); break;
3868 case 2: local_scan_init(); break;
3869 case 3: readconf_retries(); break;
3870 case 4: readconf_rewrites(); break;
3871 case 5: route_init(); break;
3872 case 6: transport_init(); break;
3873 }
3874 }
3875
3876 (void)fclose(config_file);
3877 }
3878
3879 /* End of readconf.c */
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