Add an openssl_options main configuration option, to allow administrators to
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.40 2010/06/05 09:10:10 pdp Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
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 #ifndef DISABLE_DKIM
146 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
147 #endif
148 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
149 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
150 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
151 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
152 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
153 #ifdef WITH_CONTENT_SCAN
154 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
155 #endif
156 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
157 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
158 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
159 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
160 #ifdef SUPPORT_TLS
161 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
162 #endif
163 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
164 { "admin_groups", opt_gidlist, &admin_groups },
165 { "allow_domain_literals", opt_bool, &allow_domain_literals },
166 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
167 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
168 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
169 { "auto_thaw", opt_time, &auto_thaw },
170 #ifdef WITH_CONTENT_SCAN
171 { "av_scanner", opt_stringptr, &av_scanner },
172 #endif
173 { "bi_command", opt_stringptr, &bi_command },
174 #ifdef EXPERIMENTAL_BRIGHTMAIL
175 { "bmi_config_file", opt_stringptr, &bmi_config_file },
176 #endif
177 { "bounce_message_file", opt_stringptr, &bounce_message_file },
178 { "bounce_message_text", opt_stringptr, &bounce_message_text },
179 { "bounce_return_body", opt_bool, &bounce_return_body },
180 { "bounce_return_message", opt_bool, &bounce_return_message },
181 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
182 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
183 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
184 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
185 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
186 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
187 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
188 { "check_log_inodes", opt_int, &check_log_inodes },
189 { "check_log_space", opt_Kint, &check_log_space },
190 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
191 { "check_spool_inodes", opt_int, &check_spool_inodes },
192 { "check_spool_space", opt_Kint, &check_spool_space },
193 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
194 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
195 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
196 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
197 #ifdef EXPERIMENTAL_DCC
198 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
199 { "dccifd_address", opt_stringptr, &dccifd_address },
200 { "dccifd_options", opt_stringptr, &dccifd_options },
201 #endif
202 { "delay_warning", opt_timelist, &delay_warning },
203 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
204 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
205 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
206 { "delivery_date_remove", opt_bool, &delivery_date_remove },
207 #ifdef ENABLE_DISABLE_FSYNC
208 { "disable_fsync", opt_bool, &disable_fsync },
209 #endif
210 { "disable_ipv6", opt_bool, &disable_ipv6 },
211 #ifndef DISABLE_DKIM
212 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
213 #endif
214 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
215 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
216 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
217 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
218 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
219 { "dns_retrans", opt_time, &dns_retrans },
220 { "dns_retry", opt_int, &dns_retry },
221 /* This option is now a no-op, retained for compability */
222 { "drop_cr", opt_bool, &drop_cr },
223 /*********************************************************/
224 { "dsn_from", opt_stringptr, &dsn_from },
225 { "envelope_to_remove", opt_bool, &envelope_to_remove },
226 { "errors_copy", opt_stringptr, &errors_copy },
227 { "errors_reply_to", opt_stringptr, &errors_reply_to },
228 { "exim_group", opt_gid, &exim_gid },
229 { "exim_path", opt_stringptr, &exim_path },
230 { "exim_user", opt_uid, &exim_uid },
231 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
232 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
233 { "finduser_retries", opt_int, &finduser_retries },
234 { "freeze_tell", opt_stringptr, &freeze_tell },
235 { "gecos_name", opt_stringptr, &gecos_name },
236 { "gecos_pattern", opt_stringptr, &gecos_pattern },
237 #ifdef SUPPORT_TLS
238 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
239 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
240 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
241 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
242 #endif
243 { "header_line_maxsize", opt_int, &header_line_maxsize },
244 { "header_maxsize", opt_int, &header_maxsize },
245 { "headers_charset", opt_stringptr, &headers_charset },
246 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
247 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
248 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
249 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
250 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
251 { "hold_domains", opt_stringptr, &hold_domains },
252 { "host_lookup", opt_stringptr, &host_lookup },
253 { "host_lookup_order", opt_stringptr, &host_lookup_order },
254 { "host_reject_connection", opt_stringptr, &host_reject_connection },
255 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
256 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
257 #ifdef LOOKUP_IBASE
258 { "ibase_servers", opt_stringptr, &ibase_servers },
259 #endif
260 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
261 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
262 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
263 { "keep_malformed", opt_time, &keep_malformed },
264 #ifdef LOOKUP_LDAP
265 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
266 { "ldap_version", opt_int, &eldap_version },
267 #endif
268 { "local_from_check", opt_bool, &local_from_check },
269 { "local_from_prefix", opt_stringptr, &local_from_prefix },
270 { "local_from_suffix", opt_stringptr, &local_from_suffix },
271 { "local_interfaces", opt_stringptr, &local_interfaces },
272 { "local_scan_timeout", opt_time, &local_scan_timeout },
273 { "local_sender_retain", opt_bool, &local_sender_retain },
274 { "localhost_number", opt_stringptr, &host_number_string },
275 { "log_file_path", opt_stringptr, &log_file_path },
276 { "log_selector", opt_stringptr, &log_selector_string },
277 { "log_timezone", opt_bool, &log_timezone },
278 { "lookup_open_max", opt_int, &lookup_open_max },
279 { "max_username_length", opt_int, &max_username_length },
280 { "message_body_newlines", opt_bool, &message_body_newlines },
281 { "message_body_visible", opt_mkint, &message_body_visible },
282 { "message_id_header_domain", opt_stringptr, &message_id_domain },
283 { "message_id_header_text", opt_stringptr, &message_id_text },
284 { "message_logs", opt_bool, &message_logs },
285 { "message_size_limit", opt_stringptr, &message_size_limit },
286 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
287 { "move_frozen_messages", opt_bool, &move_frozen_messages },
288 #endif
289 { "mua_wrapper", opt_bool, &mua_wrapper },
290 #ifdef LOOKUP_MYSQL
291 { "mysql_servers", opt_stringptr, &mysql_servers },
292 #endif
293 { "never_users", opt_uidlist, &never_users },
294 #ifdef SUPPORT_TLS
295 { "openssl_options", opt_stringptr, &openssl_options },
296 #endif
297 #ifdef LOOKUP_ORACLE
298 { "oracle_servers", opt_stringptr, &oracle_servers },
299 #endif
300 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
301 #ifdef EXIM_PERL
302 { "perl_at_start", opt_bool, &opt_perl_at_start },
303 { "perl_startup", opt_stringptr, &opt_perl_startup },
304 #endif
305 #ifdef LOOKUP_PGSQL
306 { "pgsql_servers", opt_stringptr, &pgsql_servers },
307 #endif
308 { "pid_file_path", opt_stringptr, &pid_file_path },
309 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
310 { "preserve_message_logs", opt_bool, &preserve_message_logs },
311 { "primary_hostname", opt_stringptr, &primary_hostname },
312 { "print_topbitchars", opt_bool, &print_topbitchars },
313 { "process_log_path", opt_stringptr, &process_log_path },
314 { "prod_requires_admin", opt_bool, &prod_requires_admin },
315 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
316 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
317 { "queue_domains", opt_stringptr, &queue_domains },
318 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
319 { "queue_only", opt_bool, &queue_only },
320 { "queue_only_file", opt_stringptr, &queue_only_file },
321 { "queue_only_load", opt_fixed, &queue_only_load },
322 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
323 { "queue_only_override", opt_bool, &queue_only_override },
324 { "queue_run_in_order", opt_bool, &queue_run_in_order },
325 { "queue_run_max", opt_int, &queue_run_max },
326 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
327 { "receive_timeout", opt_time, &receive_timeout },
328 { "received_header_text", opt_stringptr, &received_header_text },
329 { "received_headers_max", opt_int, &received_headers_max },
330 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
331 { "recipients_max", opt_int, &recipients_max },
332 { "recipients_max_reject", opt_bool, &recipients_max_reject },
333 { "remote_max_parallel", opt_int, &remote_max_parallel },
334 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
335 { "retry_data_expire", opt_time, &retry_data_expire },
336 { "retry_interval_max", opt_time, &retry_interval_max },
337 { "return_path_remove", opt_bool, &return_path_remove },
338 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
339 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
340 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
341 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
342 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
343 { "smtp_accept_max", opt_int, &smtp_accept_max },
344 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
345 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
346 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
347 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
348 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
349 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
350 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
351 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
352 { "smtp_banner", opt_stringptr, &smtp_banner },
353 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
354 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
355 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
356 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
357 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
358 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
359 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
360 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
361 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
362 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
363 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
364 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
365 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
366 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
367 #ifdef WITH_CONTENT_SCAN
368 { "spamd_address", opt_stringptr, &spamd_address },
369 #endif
370 #ifdef EXPERIMENTAL_SPF
371 { "spf_guess", opt_stringptr, &spf_guess },
372 #endif
373 { "split_spool_directory", opt_bool, &split_spool_directory },
374 { "spool_directory", opt_stringptr, &spool_directory },
375 #ifdef LOOKUP_SQLITE
376 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
377 #endif
378 #ifdef EXPERIMENTAL_SRS
379 { "srs_config", opt_stringptr, &srs_config },
380 { "srs_hashlength", opt_int, &srs_hashlength },
381 { "srs_hashmin", opt_int, &srs_hashmin },
382 { "srs_maxage", opt_int, &srs_maxage },
383 { "srs_secrets", opt_stringptr, &srs_secrets },
384 { "srs_usehash", opt_bool, &srs_usehash },
385 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
386 #endif
387 { "strict_acl_vars", opt_bool, &strict_acl_vars },
388 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
389 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
390 { "syslog_duplication", opt_bool, &syslog_duplication },
391 { "syslog_facility", opt_stringptr, &syslog_facility_str },
392 { "syslog_processname", opt_stringptr, &syslog_processname },
393 { "syslog_timestamp", opt_bool, &syslog_timestamp },
394 { "system_filter", opt_stringptr, &system_filter },
395 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
396 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
397 { "system_filter_group", opt_gid, &system_filter_gid },
398 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
399 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
400 { "system_filter_user", opt_uid, &system_filter_uid },
401 { "tcp_nodelay", opt_bool, &tcp_nodelay },
402 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
403 { "timezone", opt_stringptr, &timezone_string },
404 #ifdef SUPPORT_TLS
405 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
406 { "tls_certificate", opt_stringptr, &tls_certificate },
407 { "tls_crl", opt_stringptr, &tls_crl },
408 { "tls_dhparam", opt_stringptr, &tls_dhparam },
409 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
410 { "tls_privatekey", opt_stringptr, &tls_privatekey },
411 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
412 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
413 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
414 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
415 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
416 #endif
417 { "trusted_groups", opt_gidlist, &trusted_groups },
418 { "trusted_users", opt_uidlist, &trusted_users },
419 { "unknown_login", opt_stringptr, &unknown_login },
420 { "unknown_username", opt_stringptr, &unknown_username },
421 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
422 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
423 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
424 { "warn_message_file", opt_stringptr, &warn_message_file },
425 { "write_rejectlog", opt_bool, &write_rejectlog }
426 };
427
428 static int optionlist_config_size =
429 sizeof(optionlist_config)/sizeof(optionlist);
430
431
432
433 /*************************************************
434 * Find the name of an option *
435 *************************************************/
436
437 /* This function is to aid debugging. Various functions take arguments that are
438 pointer variables in the options table or in option tables for various drivers.
439 For debugging output, it is useful to be able to find the name of the option
440 which is currently being processed. This function finds it, if it exists, by
441 searching the table(s).
442
443 Arguments: a value that is presumed to be in the table above
444 Returns: the option name, or an empty string
445 */
446
447 uschar *
448 readconf_find_option(void *p)
449 {
450 int i;
451 router_instance *r;
452 transport_instance *t;
453
454 for (i = 0; i < optionlist_config_size; i++)
455 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
456
457 for (r = routers; r != NULL; r = r->next)
458 {
459 router_info *ri = r->info;
460 for (i = 0; i < ri->options_count[0]; i++)
461 {
462 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
463 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
464 return US ri->options[i].name;
465 }
466 }
467
468 for (t = transports; t != NULL; t = t->next)
469 {
470 transport_info *ti = t->info;
471 for (i = 0; i < ti->options_count[0]; i++)
472 {
473 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
474 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
475 return US ti->options[i].name;
476 }
477 }
478
479 return US"";
480 }
481
482
483
484
485 /*************************************************
486 * Deal with an assignment to a macro *
487 *************************************************/
488
489 /* This function is called when a line that starts with an upper case letter is
490 encountered. The argument "line" should contain a complete logical line, and
491 start with the first letter of the macro name. The macro name and the
492 replacement text are extracted and stored. Redefinition of existing,
493 non-command line, macros is permitted using '==' instead of '='.
494
495 Arguments:
496 s points to the start of the logical line
497
498 Returns: nothing
499 */
500
501 static void
502 read_macro_assignment(uschar *s)
503 {
504 uschar name[64];
505 int namelen = 0;
506 BOOL redef = FALSE;
507 macro_item *m;
508 macro_item *mlast = NULL;
509
510 while (isalnum(*s) || *s == '_')
511 {
512 if (namelen >= sizeof(name) - 1)
513 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
514 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
515 name[namelen++] = *s++;
516 }
517 name[namelen] = 0;
518
519 while (isspace(*s)) s++;
520 if (*s++ != '=')
521 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
522
523 if (*s == '=')
524 {
525 redef = TRUE;
526 s++;
527 }
528 while (isspace(*s)) s++;
529
530 /* If an existing macro of the same name was defined on the command line, we
531 just skip this definition. It's an error to attempt to redefine a macro without
532 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
533 It is also an error to define a macro whose name begins with the name of a
534 previously defined macro. Note: it is documented that the other way round
535 works. */
536
537 for (m = macros; m != NULL; m = m->next)
538 {
539 int len = Ustrlen(m->name);
540
541 if (Ustrcmp(m->name, name) == 0)
542 {
543 if (!m->command_line && !redef)
544 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
545 "defined (use \"==\" if you want to redefine it", name);
546 break;
547 }
548
549 if (len < namelen && Ustrstr(name, m->name) != NULL)
550 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
551 "a macro because previously defined macro \"%s\" is a substring",
552 name, m->name);
553
554 /* We cannot have this test, because it is documented that a substring
555 macro is permitted (there is even an example).
556 *
557 * if (len > namelen && Ustrstr(m->name, name) != NULL)
558 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
559 * "a macro because it is a substring of previously defined macro \"%s\"",
560 * name, m->name);
561 */
562
563 mlast = m;
564 }
565
566 /* Check for an overriding command-line definition. */
567
568 if (m != NULL && m->command_line) return;
569
570 /* Redefinition must refer to an existing macro. */
571
572 if (redef)
573 {
574 if (m == NULL)
575 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
576 "\"%s\"", name);
577 }
578
579 /* We have a new definition. The macro_item structure includes a final vector
580 called "name" which is one byte long. Thus, adding "namelen" gives us enough
581 room to store the "name" string. */
582
583 else
584 {
585 m = store_get(sizeof(macro_item) + namelen);
586 if (macros == NULL) macros = m; else mlast->next = m;
587 Ustrncpy(m->name, name, namelen);
588 m->name[namelen] = 0;
589 m->next = NULL;
590 m->command_line = FALSE;
591 }
592
593 /* Set the value of the new or redefined macro */
594
595 m->replacement = string_copy(s);
596 }
597
598
599
600
601
602 /*************************************************
603 * Read configuration line *
604 *************************************************/
605
606 /* A logical line of text is read from the configuration file into the big
607 buffer, taking account of macros, .includes, and continuations. The size of
608 big_buffer is increased if necessary. The count of configuration lines is
609 maintained. Physical input lines starting with # (ignoring leading white space,
610 and after macro replacement) and empty logical lines are always ignored.
611 Leading and trailing spaces are removed.
612
613 If we hit a line of the form "begin xxxx", the xxxx is placed in the
614 next_section vector, and the function returns NULL, indicating the end of a
615 configuration section. On end-of-file, NULL is returned with next_section
616 empty.
617
618 Arguments: none
619
620 Returns: a pointer to the first non-blank in the line,
621 or NULL if eof or end of section is reached
622 */
623
624 static uschar *
625 get_config_line(void)
626 {
627 int startoffset = 0; /* To first non-blank char in logical line */
628 int len = 0; /* Of logical line so far */
629 int newlen;
630 uschar *s, *ss;
631 macro_item *m;
632 BOOL macro_found;
633
634 /* Loop for handling continuation lines, skipping comments, and dealing with
635 .include files. */
636
637 for (;;)
638 {
639 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
640 {
641 if (config_file_stack != NULL) /* EOF inside .include */
642 {
643 (void)fclose(config_file);
644 config_file = config_file_stack->file;
645 config_filename = config_file_stack->filename;
646 config_lineno = config_file_stack->lineno;
647 config_file_stack = config_file_stack->next;
648 continue;
649 }
650
651 /* EOF at top level */
652
653 if (cstate_stack_ptr >= 0)
654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
655 "Unexpected end of configuration file: .endif missing");
656
657 if (len != 0) break; /* EOF after continuation */
658 next_section[0] = 0; /* EOF at start of logical line */
659 return NULL;
660 }
661
662 config_lineno++;
663 newlen = len + Ustrlen(big_buffer + len);
664
665 /* Handle pathologically long physical lines - yes, it did happen - by
666 extending big_buffer at this point. The code also copes with very long
667 logical lines. */
668
669 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
670 {
671 uschar *newbuffer;
672 big_buffer_size += BIG_BUFFER_SIZE;
673 newbuffer = store_malloc(big_buffer_size);
674
675 /* This use of strcpy is OK because we know that the string in the old
676 buffer is shorter than the new buffer. */
677
678 Ustrcpy(newbuffer, big_buffer);
679 store_free(big_buffer);
680 big_buffer = newbuffer;
681 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
682 break;
683 newlen += Ustrlen(big_buffer + newlen);
684 }
685
686 /* Find the true start of the physical line - leading spaces are always
687 ignored. */
688
689 ss = big_buffer + len;
690 while (isspace(*ss)) ss++;
691
692 /* Process the physical line for macros. If this is the start of the logical
693 line, skip over initial text at the start of the line if it starts with an
694 upper case character followed by a sequence of name characters and an equals
695 sign, because that is the definition of a new macro, and we don't do
696 replacement therein. */
697
698 s = ss;
699 if (len == 0 && isupper(*s))
700 {
701 while (isalnum(*s) || *s == '_') s++;
702 while (isspace(*s)) s++;
703 if (*s != '=') s = ss; /* Not a macro definition */
704 }
705
706 /* For each defined macro, scan the line (from after XXX= if present),
707 replacing all occurrences of the macro. */
708
709 macro_found = FALSE;
710 for (m = macros; m != NULL; m = m->next)
711 {
712 uschar *p, *pp;
713 uschar *t = s;
714
715 while ((p = Ustrstr(t, m->name)) != NULL)
716 {
717 int moveby;
718 int namelen = Ustrlen(m->name);
719 int replen = Ustrlen(m->replacement);
720
721 /* Expand the buffer if necessary */
722
723 while (newlen - namelen + replen + 1 > big_buffer_size)
724 {
725 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
726 uschar *newbuffer = store_malloc(newsize);
727 memcpy(newbuffer, big_buffer, newlen + 1);
728 p = newbuffer + (p - big_buffer);
729 s = newbuffer + (s - big_buffer);
730 ss = newbuffer + (ss - big_buffer);
731 t = newbuffer + (t - big_buffer);
732 big_buffer_size = newsize;
733 store_free(big_buffer);
734 big_buffer = newbuffer;
735 }
736
737 /* Shuffle the remaining characters up or down in the buffer before
738 copying in the replacement text. Don't rescan the replacement for this
739 same macro. */
740
741 pp = p + namelen;
742 moveby = replen - namelen;
743 if (moveby != 0)
744 {
745 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
746 newlen += moveby;
747 }
748 Ustrncpy(p, m->replacement, replen);
749 t = p + replen;
750 macro_found = TRUE;
751 }
752 }
753
754 /* An empty macro replacement at the start of a line could mean that ss no
755 longer points to the first non-blank character. */
756
757 while (isspace(*ss)) ss++;
758
759 /* Check for comment lines - these are physical lines. */
760
761 if (*ss == '#') continue;
762
763 /* Handle conditionals, which are also applied to physical lines. Conditions
764 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
765 expansion occured on the rest of the line. A preliminary test for the leading
766 '.' saves effort on most lines. */
767
768 if (*ss == '.')
769 {
770 int i;
771
772 /* Search the list of conditional directives */
773
774 for (i = 0; i < cond_list_size; i++)
775 {
776 int n;
777 cond_item *c = cond_list+i;
778 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
779
780 /* The following character must be white space or end of string */
781
782 n = ss[1 + c->namelen];
783 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
784
785 /* .ifdef and .ifndef push the current state onto the stack, then set
786 a new one from the table. Stack overflow is an error */
787
788 if (c->pushpop > 0)
789 {
790 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
791 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
792 ".%s nested too deeply", c->name);
793 cstate_stack[++cstate_stack_ptr] = cstate;
794 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
795 }
796
797 /* For any of the others, stack underflow is an error. The next state
798 comes either from the stack (.endif) or from the table. */
799
800 else
801 {
802 if (cstate_stack_ptr < 0)
803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
804 ".%s without matching .ifdef", c->name);
805 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
806 next_cstate[cstate][macro_found? c->action1 : c->action2];
807 }
808
809 /* Having dealt with a directive, break the loop */
810
811 break;
812 }
813
814 /* If we have handled a conditional directive, continue with the next
815 physical line. Otherwise, fall through. */
816
817 if (i < cond_list_size) continue;
818 }
819
820 /* If the conditional state is not 0 (actively using these lines), ignore
821 this input line. */
822
823 if (cstate != 0) continue; /* Conditional skip */
824
825 /* Handle .include lines - these are also physical lines. */
826
827 if (Ustrncmp(ss, ".include", 8) == 0 &&
828 (isspace(ss[8]) ||
829 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
830 {
831 uschar *t;
832 int include_if_exists = isspace(ss[8])? 0 : 10;
833 config_file_item *save;
834 struct stat statbuf;
835
836 ss += 9 + include_if_exists;
837 while (isspace(*ss)) ss++;
838 t = ss + Ustrlen(ss);
839 while (t > ss && isspace(t[-1])) t--;
840 if (*ss == '\"' && t[-1] == '\"')
841 {
842 ss++;
843 t--;
844 }
845 *t = 0;
846
847 if (*ss != '/')
848 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
849 "absolute path \"%s\"", ss);
850
851 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
852
853 save = store_get(sizeof(config_file_item));
854 save->next = config_file_stack;
855 config_file_stack = save;
856 save->file = config_file;
857 save->filename = config_filename;
858 save->lineno = config_lineno;
859
860 config_file = Ufopen(ss, "rb");
861 if (config_file == NULL)
862 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
863 "configuration file %s", ss);
864 config_filename = string_copy(ss);
865 config_lineno = 0;
866 continue;
867 }
868
869 /* If this is the start of the logical line, remember where the non-blank
870 data starts. Otherwise shuffle down continuation lines to remove leading
871 white space. */
872
873 if (len == 0)
874 startoffset = ss - big_buffer;
875 else
876 {
877 s = big_buffer + len;
878 if (ss > s)
879 {
880 memmove(s, ss, (newlen - len) - (ss - s) + 1);
881 newlen -= ss - s;
882 }
883 }
884
885 /* Accept the new addition to the line. Remove trailing white space. */
886
887 len = newlen;
888 while (len > 0 && isspace(big_buffer[len-1])) len--;
889 big_buffer[len] = 0;
890
891 /* We are done if the line does not end in backslash and contains some data.
892 Empty logical lines are ignored. For continuations, remove the backslash and
893 go round the loop to read the continuation line. */
894
895 if (len > 0)
896 {
897 if (big_buffer[len-1] != '\\') break; /* End of logical line */
898 big_buffer[--len] = 0; /* Remove backslash */
899 }
900 } /* Loop for reading multiple physical lines */
901
902 /* We now have a logical line. Test for the end of a configuration section (or,
903 more accurately, for the start of the next section). Place the name of the next
904 section in next_section, and return NULL. If the name given is longer than
905 next_section, truncate it. It will be unrecognized later, because all the known
906 section names do fit. Leave space for pluralizing. */
907
908 s = big_buffer + startoffset; /* First non-space character */
909 if (strncmpic(s, US"begin ", 6) == 0)
910 {
911 s += 6;
912 while (isspace(*s)) s++;
913 if (big_buffer + len - s > sizeof(next_section) - 2)
914 s[sizeof(next_section) - 2] = 0;
915 Ustrcpy(next_section, s);
916 return NULL;
917 }
918
919 /* Return the first non-blank character. */
920
921 return s;
922 }
923
924
925
926 /*************************************************
927 * Read a name *
928 *************************************************/
929
930 /* The yield is the pointer to the next uschar. Names longer than the
931 output space are silently truncated. This function is also used from acl.c when
932 parsing ACLs.
933
934 Arguments:
935 name where to put the name
936 len length of name
937 s input pointer
938
939 Returns: new input pointer
940 */
941
942 uschar *
943 readconf_readname(uschar *name, int len, uschar *s)
944 {
945 int p = 0;
946 while (isspace(*s)) s++;
947 if (isalpha(*s))
948 {
949 while (isalnum(*s) || *s == '_')
950 {
951 if (p < len-1) name[p++] = *s;
952 s++;
953 }
954 }
955 name[p] = 0;
956 while (isspace(*s)) s++;
957 return s;
958 }
959
960
961
962
963 /*************************************************
964 * Read a time value *
965 *************************************************/
966
967 /* This function is also called from outside, to read argument
968 time values. The format of a time value is:
969
970 [<n>w][<n>d][<n>h][<n>m][<n>s]
971
972 as long as at least one is present. If a format error is encountered,
973 return a negative value. The value must be terminated by the given
974 terminator.
975
976 Arguments:
977 s input pointer
978 terminator required terminating character
979 return_msec if TRUE, allow fractional seconds and return milliseconds
980
981 Returns: the time value, or -1 on syntax error
982 value is seconds if return_msec is FALSE
983 value is milliseconds if return_msec is TRUE
984 */
985
986 int
987 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
988 {
989 int yield = 0;
990 for (;;)
991 {
992 int value, count;
993 double fraction;
994
995 if (!isdigit(*s)) return -1;
996 (void)sscanf(CS s, "%d%n", &value, &count);
997 s += count;
998
999 switch (*s)
1000 {
1001 case 'w': value *= 7;
1002 case 'd': value *= 24;
1003 case 'h': value *= 60;
1004 case 'm': value *= 60;
1005 case 's': s++;
1006 break;
1007
1008 case '.':
1009 if (!return_msec) return -1;
1010 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1011 s += count;
1012 if (*s++ != 's') return -1;
1013 yield += (int)(fraction * 1000.0);
1014 break;
1015
1016 default: return -1;
1017 }
1018
1019 if (return_msec) value *= 1000;
1020 yield += value;
1021 if (*s == terminator) return yield;
1022 }
1023 /* Control never reaches here. */
1024 }
1025
1026
1027
1028 /*************************************************
1029 * Read a fixed point value *
1030 *************************************************/
1031
1032 /* The value is returned *1000
1033
1034 Arguments:
1035 s input pointer
1036 terminator required terminator
1037
1038 Returns: the value, or -1 on error
1039 */
1040
1041 static int
1042 readconf_readfixed(uschar *s, int terminator)
1043 {
1044 int yield = 0;
1045 int value, count;
1046 if (!isdigit(*s)) return -1;
1047 (void)sscanf(CS s, "%d%n", &value, &count);
1048 s += count;
1049 yield = value * 1000;
1050 if (*s == '.')
1051 {
1052 int m = 100;
1053 while (isdigit((*(++s))))
1054 {
1055 yield += (*s - '0') * m;
1056 m /= 10;
1057 }
1058 }
1059
1060 return (*s == terminator)? yield : (-1);
1061 }
1062
1063
1064
1065 /*************************************************
1066 * Find option in list *
1067 *************************************************/
1068
1069 /* The lists are always in order, so binary chop can be used.
1070
1071 Arguments:
1072 name the option name to search for
1073 ol the first entry in the option list
1074 last one more than the offset of the last entry in the option list
1075
1076 Returns: pointer to an option entry, or NULL if not found
1077 */
1078
1079 static optionlist *
1080 find_option(uschar *name, optionlist *ol, int last)
1081 {
1082 int first = 0;
1083 while (last > first)
1084 {
1085 int middle = (first + last)/2;
1086 int c = Ustrcmp(name, ol[middle].name);
1087 if (c == 0) return ol + middle;
1088 else if (c > 0) first = middle + 1;
1089 else last = middle;
1090 }
1091 return NULL;
1092 }
1093
1094
1095
1096 /*************************************************
1097 * Find a set flag in option list *
1098 *************************************************/
1099
1100 /* Because some versions of Unix make no restrictions on the values of uids and
1101 gids (even negative ones), we cannot represent "unset" by a special value.
1102 There is therefore a separate boolean variable for each one indicating whether
1103 a value is set or not. This function returns a pointer to the boolean, given
1104 the original option name. It is a major disaster if the flag cannot be found.
1105
1106 Arguments:
1107 name the name of the uid or gid option
1108 oltop points to the start of the relevant option list
1109 last one more than the offset of the last item in the option list
1110 data_block NULL when reading main options => data values in the option
1111 list are absolute addresses; otherwise they are byte offsets
1112 in data_block (used for driver options)
1113
1114 Returns: a pointer to the boolean flag.
1115 */
1116
1117 static BOOL *
1118 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1119 {
1120 optionlist *ol;
1121 uschar name2[64];
1122 sprintf(CS name2, "*set_%.50s", name);
1123 ol = find_option(name2, oltop, last);
1124 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1125 "Exim internal error: missing set flag for %s", name);
1126 return (data_block == NULL)? (BOOL *)(ol->value) :
1127 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1128 }
1129
1130
1131
1132
1133 /*************************************************
1134 * Output extra characters message and die *
1135 *************************************************/
1136
1137 /* Called when an option line has junk on the end. Sometimes this is because
1138 the sysadmin thinks comments are permitted.
1139
1140 Arguments:
1141 s points to the extra characters
1142 t1..t3 strings to insert in the log message
1143
1144 Returns: doesn't return; dies
1145 */
1146
1147 static void
1148 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1149 {
1150 uschar *comment = US"";
1151 if (*s == '#') comment = US" (# is comment only at line start)";
1152 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1153 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1154 }
1155
1156
1157
1158 /*************************************************
1159 * Read rewrite information *
1160 *************************************************/
1161
1162 /* Each line of rewrite information contains:
1163
1164 . A complete address in the form user@domain, possibly with
1165 leading * for each part; or alternatively, a regex.
1166
1167 . A replacement string (which will be expanded).
1168
1169 . An optional sequence of one-letter flags, indicating which
1170 headers etc. to apply this rule to.
1171
1172 All this is decoded and placed into a control block. The OR of the flags is
1173 maintained in a common word.
1174
1175 Arguments:
1176 p points to the string that makes up the rule
1177 existflags points to the overall flag word
1178 isglobal TRUE if reading global rewrite rules
1179
1180 Returns: the control block for the parsed rule.
1181 */
1182
1183 static rewrite_rule *
1184 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1185 {
1186 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1187
1188 next->next = NULL;
1189 next->key = string_dequote(&p);
1190
1191 while (isspace(*p)) p++;
1192 if (*p == 0)
1193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1194 "missing rewrite replacement string");
1195
1196 next->flags = 0;
1197 next->replacement = string_dequote(&p);
1198
1199 while (*p != 0) switch (*p++)
1200 {
1201 case ' ': case '\t': break;
1202
1203 case 'q': next->flags |= rewrite_quit; break;
1204 case 'w': next->flags |= rewrite_whole; break;
1205
1206 case 'h': next->flags |= rewrite_all_headers; break;
1207 case 's': next->flags |= rewrite_sender; break;
1208 case 'f': next->flags |= rewrite_from; break;
1209 case 't': next->flags |= rewrite_to; break;
1210 case 'c': next->flags |= rewrite_cc; break;
1211 case 'b': next->flags |= rewrite_bcc; break;
1212 case 'r': next->flags |= rewrite_replyto; break;
1213
1214 case 'E': next->flags |= rewrite_all_envelope; break;
1215 case 'F': next->flags |= rewrite_envfrom; break;
1216 case 'T': next->flags |= rewrite_envto; break;
1217
1218 case 'Q': next->flags |= rewrite_qualify; break;
1219 case 'R': next->flags |= rewrite_repeat; break;
1220
1221 case 'S':
1222 next->flags |= rewrite_smtp;
1223 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1224 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1225 "rewrite rule has the S flag but is not a regular expression");
1226 break;
1227
1228 default:
1229 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1230 "unknown rewrite flag character '%c' "
1231 "(could be missing quotes round replacement item)", p[-1]);
1232 break;
1233 }
1234
1235 /* If no action flags are set, set all the "normal" rewrites. */
1236
1237 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1238 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1239
1240 /* Remember which exist, for optimization, and return the rule */
1241
1242 *existflags |= next->flags;
1243 return next;
1244 }
1245
1246
1247
1248
1249 /*************************************************
1250 * Read global rewrite information *
1251 *************************************************/
1252
1253 /* Each line is a single rewrite rule; it is parsed into a control block
1254 by readconf_one_rewrite(), and its flags are ORed into the global flag
1255 word rewrite_existflags. */
1256
1257 void
1258 readconf_rewrites(void)
1259 {
1260 rewrite_rule **chain = &global_rewrite_rules;
1261 uschar *p;
1262
1263 while ((p = get_config_line()) != NULL)
1264 {
1265 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1266 *chain = next;
1267 chain = &(next->next);
1268 }
1269 }
1270
1271
1272
1273 /*************************************************
1274 * Read a string *
1275 *************************************************/
1276
1277 /* Strings are read into the normal store pool. As long we aren't too
1278 near the end of the current block, the string will just use what is necessary
1279 on the top of the stacking pool, because string_cat() uses the extension
1280 mechanism.
1281
1282 Argument:
1283 s the rest of the input line
1284 name the option name (for errors)
1285
1286 Returns: pointer to the string
1287 */
1288
1289 static uschar *
1290 read_string(uschar *s, uschar *name)
1291 {
1292 uschar *yield;
1293 uschar *ss;
1294
1295 if (*s != '\"') return string_copy(s);
1296
1297 ss = s;
1298 yield = string_dequote(&s);
1299
1300 if (s == ss+1 || s[-1] != '\"')
1301 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1302 "missing quote at end of string value for %s", name);
1303
1304 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1305
1306 return yield;
1307 }
1308
1309
1310 /*************************************************
1311 * Handle option line *
1312 *************************************************/
1313
1314 /* This function is called from several places to process a line containing the
1315 setting of an option. The first argument is the line to be decoded; it has been
1316 checked not to be empty and not to start with '#'. Trailing newlines and white
1317 space have been removed. The second argument is a pointer to the list of
1318 variable names that are to be recognized, together with their types and
1319 locations, and the third argument gives the number of entries in the list.
1320
1321 The fourth argument is a pointer to a data block. If it is NULL, then the data
1322 values in the options list are absolute addresses. Otherwise, they are byte
1323 offsets in the data block.
1324
1325 String option data may continue onto several lines; this function reads further
1326 data from config_file if necessary.
1327
1328 The yield of this function is normally zero. If a string continues onto
1329 multiple lines, then the data value is permitted to be followed by a comma
1330 or a semicolon (for use in drivers) and the yield is that character.
1331
1332 Arguments:
1333 buffer contains the configuration line to be handled
1334 oltop points to the start of the relevant option list
1335 last one more than the offset of the last item in the option list
1336 data_block NULL when reading main options => data values in the option
1337 list are absolute addresses; otherwise they are byte offsets
1338 in data_block when they have opt_public set; otherwise
1339 they are byte offsets in data_block->options_block.
1340 unknown_txt format string to use in panic message for unknown option;
1341 must contain %s for option name
1342 if given as NULL, don't panic on unknown option
1343
1344 Returns: TRUE if an option was read successfully,
1345 FALSE false for an unknown option if unknown_txt == NULL,
1346 otherwise panic and die on an unknown option
1347 */
1348
1349 static BOOL
1350 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1351 void *data_block, uschar *unknown_txt)
1352 {
1353 int ptr = 0;
1354 int offset = 0;
1355 int n, count, type, value;
1356 int issecure = 0;
1357 uid_t uid;
1358 gid_t gid;
1359 BOOL boolvalue = TRUE;
1360 BOOL freesptr = TRUE;
1361 optionlist *ol, *ol2;
1362 struct passwd *pw;
1363 void *reset_point;
1364 int intbase = 0;
1365 uschar *inttype = US"";
1366 uschar *sptr;
1367 uschar *s = buffer;
1368 uschar name[64];
1369 uschar name2[64];
1370
1371 /* There may be leading spaces; thereafter, we expect an option name starting
1372 with a letter. */
1373
1374 while (isspace(*s)) s++;
1375 if (!isalpha(*s))
1376 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1377
1378 /* Read the name of the option, and skip any subsequent white space. If
1379 it turns out that what we read was "hide", set the flag indicating that
1380 this is a secure option, and loop to read the next word. */
1381
1382 for (n = 0; n < 2; n++)
1383 {
1384 while (isalnum(*s) || *s == '_')
1385 {
1386 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1387 s++;
1388 }
1389 name[ptr] = 0;
1390 while (isspace(*s)) s++;
1391 if (Ustrcmp(name, "hide") != 0) break;
1392 issecure = opt_secure;
1393 ptr = 0;
1394 }
1395
1396 /* Deal with "no_" or "not_" here for booleans */
1397
1398 if (Ustrncmp(name, "no_", 3) == 0)
1399 {
1400 boolvalue = FALSE;
1401 offset = 3;
1402 }
1403
1404 if (Ustrncmp(name, "not_", 4) == 0)
1405 {
1406 boolvalue = FALSE;
1407 offset = 4;
1408 }
1409
1410 /* Search the list for the given name. A non-existent name, or an option that
1411 is set twice, is a disaster. */
1412
1413 ol = find_option(name + offset, oltop, last);
1414
1415 if (ol == NULL)
1416 {
1417 if (unknown_txt == NULL) return FALSE;
1418 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1419 }
1420
1421 if ((ol->type & opt_set) != 0)
1422 {
1423 uschar *mname = name;
1424 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1425 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1426 "\"%s\" option set for the second time", mname);
1427 }
1428
1429 ol->type |= opt_set | issecure;
1430 type = ol->type & opt_mask;
1431
1432 /* Types with data values must be followed by '='; the "no[t]_" prefix
1433 applies only to boolean values. */
1434
1435 if (type < opt_bool || type > opt_bool_last)
1436 {
1437 if (offset != 0)
1438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1439 "negation prefix applied to a non-boolean option");
1440 if (*s == 0)
1441 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1442 "unexpected end of line (data missing) after %s", name);
1443 if (*s != '=')
1444 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1445 }
1446
1447 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1448 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1449 ultimately expands to one of those values. */
1450
1451 else if (*s != 0 && (offset != 0 || *s != '='))
1452 extra_chars_error(s, US"boolean option ", name, US"");
1453
1454 /* Skip white space after = */
1455
1456 if (*s == '=') while (isspace((*(++s))));
1457
1458 /* If there is a data block and the opt_public flag is not set, change
1459 the data block pointer to the private options block. */
1460
1461 if (data_block != NULL && (ol->type & opt_public) == 0)
1462 data_block = (void *)(((driver_instance *)data_block)->options_block);
1463
1464 /* Now get the data according to the type. */
1465
1466 switch (type)
1467 {
1468 /* If a string value is not enclosed in quotes, it consists of
1469 the rest of the current line, verbatim. Otherwise, string escapes
1470 are processed.
1471
1472 A transport is specified as a string, which is then looked up in the
1473 list of transports. A search type is specified as one of a number of
1474 known strings.
1475
1476 A set or rewrite rules for a driver is specified as a string, which is
1477 then parsed into a suitable chain of control blocks.
1478
1479 Uids and gids are specified as strings which are then looked up in the
1480 passwd file. Lists of uids and gids are similarly specified as colon-
1481 separated strings. */
1482
1483 case opt_stringptr:
1484 case opt_uid:
1485 case opt_gid:
1486 case opt_expand_uid:
1487 case opt_expand_gid:
1488 case opt_uidlist:
1489 case opt_gidlist:
1490 case opt_rewrite:
1491
1492 reset_point = sptr = read_string(s, name);
1493
1494 /* Having read a string, we now have several different ways of using it,
1495 depending on the data type, so do another switch. If keeping the actual
1496 string is not required (because it is interpreted), freesptr is set TRUE,
1497 and at the end we reset the pool. */
1498
1499 switch (type)
1500 {
1501 /* If this was a string, set the variable to point to the new string,
1502 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1503 rules, we still keep the string (for printing), and parse the rules into a
1504 control block and flags word. */
1505
1506 case opt_stringptr:
1507 case opt_rewrite:
1508 if (data_block == NULL)
1509 *((uschar **)(ol->value)) = sptr;
1510 else
1511 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1512 freesptr = FALSE;
1513 if (type == opt_rewrite)
1514 {
1515 int sep = 0;
1516 int *flagptr;
1517 uschar *p = sptr;
1518 rewrite_rule **chain;
1519 optionlist *ol3;
1520
1521 sprintf(CS name2, "*%.50s_rules", name);
1522 ol2 = find_option(name2, oltop, last);
1523 sprintf(CS name2, "*%.50s_flags", name);
1524 ol3 = find_option(name2, oltop, last);
1525
1526 if (ol2 == NULL || ol3 == NULL)
1527 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1528 "rewrite rules not available for driver");
1529
1530 if (data_block == NULL)
1531 {
1532 chain = (rewrite_rule **)(ol2->value);
1533 flagptr = (int *)(ol3->value);
1534 }
1535 else
1536 {
1537 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1538 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1539 }
1540
1541 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1542 != NULL)
1543 {
1544 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1545 *chain = next;
1546 chain = &(next->next);
1547 }
1548
1549 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1551 "non-header rewrite - not allowed at transport time -");
1552 }
1553 break;
1554
1555 /* If it was an expanded uid, see if there is any expansion to be
1556 done by checking for the presence of a $ character. If there is, save it
1557 in the corresponding *expand_user option field. Otherwise, fall through
1558 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1559 of data. */
1560
1561 case opt_expand_uid:
1562 sprintf(CS name2, "*expand_%.50s", name);
1563 ol2 = find_option(name2, oltop, last);
1564 if (ol2 != NULL)
1565 {
1566 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1567
1568 if (data_block == NULL)
1569 *((uschar **)(ol2->value)) = ss;
1570 else
1571 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1572
1573 if (ss != NULL)
1574 {
1575 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1576 freesptr = FALSE;
1577 break;
1578 }
1579 }
1580
1581 /* Look up a fixed uid, and also make use of the corresponding gid
1582 if a passwd entry is returned and the gid has not been set. */
1583
1584 case opt_uid:
1585 if (!route_finduser(sptr, &pw, &uid))
1586 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1587 if (data_block == NULL)
1588 *((uid_t *)(ol->value)) = uid;
1589 else
1590 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1591
1592 /* Set the flag indicating a fixed value is set */
1593
1594 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1595
1596 /* Handle matching gid if we have a passwd entry: done by finding the
1597 same name with terminating "user" changed to "group"; if not found,
1598 ignore. Also ignore if the value is already set. */
1599
1600 if (pw == NULL) break;
1601 Ustrcpy(name+Ustrlen(name)-4, "group");
1602 ol2 = find_option(name, oltop, last);
1603 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1604 (ol2->type & opt_mask) == opt_expand_gid))
1605 {
1606 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1607 if (! *set_flag)
1608 {
1609 if (data_block == NULL)
1610 *((gid_t *)(ol2->value)) = pw->pw_gid;
1611 else
1612 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1613 *set_flag = TRUE;
1614 }
1615 }
1616 break;
1617
1618 /* If it was an expanded gid, see if there is any expansion to be
1619 done by checking for the presence of a $ character. If there is, save it
1620 in the corresponding *expand_user option field. Otherwise, fall through
1621 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1622 of data. */
1623
1624 case opt_expand_gid:
1625 sprintf(CS name2, "*expand_%.50s", name);
1626 ol2 = find_option(name2, oltop, last);
1627 if (ol2 != NULL)
1628 {
1629 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1630
1631 if (data_block == NULL)
1632 *((uschar **)(ol2->value)) = ss;
1633 else
1634 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1635
1636 if (ss != NULL)
1637 {
1638 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1639 freesptr = FALSE;
1640 break;
1641 }
1642 }
1643
1644 /* Handle freestanding gid */
1645
1646 case opt_gid:
1647 if (!route_findgroup(sptr, &gid))
1648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1649 if (data_block == NULL)
1650 *((gid_t *)(ol->value)) = gid;
1651 else
1652 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1653 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1654 break;
1655
1656 /* If it was a uid list, look up each individual entry, and build
1657 a vector of uids, with a count in the first element. Put the vector
1658 in malloc store so we can free the string. (We are reading into
1659 permanent store already.) */
1660
1661 case opt_uidlist:
1662 {
1663 int count = 1;
1664 uid_t *list;
1665 int ptr = 0;
1666 uschar *p;
1667 uschar *op = expand_string (sptr);
1668
1669 if (op == NULL)
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1671 name, expand_string_message);
1672
1673 p = op;
1674 if (*p != 0) count++;
1675 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1676 list = store_malloc(count*sizeof(uid_t));
1677 list[ptr++] = (uid_t)(count - 1);
1678
1679 if (data_block == NULL)
1680 *((uid_t **)(ol->value)) = list;
1681 else
1682 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1683
1684 p = op;
1685 while (count-- > 1)
1686 {
1687 int sep = 0;
1688 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1689 if (!route_finduser(big_buffer, NULL, &uid))
1690 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1691 big_buffer);
1692 list[ptr++] = uid;
1693 }
1694 }
1695 break;
1696
1697 /* If it was a gid list, look up each individual entry, and build
1698 a vector of gids, with a count in the first element. Put the vector
1699 in malloc store so we can free the string. (We are reading into permanent
1700 store already.) */
1701
1702 case opt_gidlist:
1703 {
1704 int count = 1;
1705 gid_t *list;
1706 int ptr = 0;
1707 uschar *p;
1708 uschar *op = expand_string (sptr);
1709
1710 if (op == NULL)
1711 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1712 name, expand_string_message);
1713
1714 p = op;
1715 if (*p != 0) count++;
1716 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1717 list = store_malloc(count*sizeof(gid_t));
1718 list[ptr++] = (gid_t)(count - 1);
1719
1720 if (data_block == NULL)
1721 *((gid_t **)(ol->value)) = list;
1722 else
1723 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1724
1725 p = op;
1726 while (count-- > 1)
1727 {
1728 int sep = 0;
1729 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1730 if (!route_findgroup(big_buffer, &gid))
1731 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1732 big_buffer);
1733 list[ptr++] = gid;
1734 }
1735 }
1736 break;
1737 }
1738
1739 /* Release store if the value of the string doesn't need to be kept. */
1740
1741 if (freesptr) store_reset(reset_point);
1742 break;
1743
1744 /* Expanded boolean: if no characters follow, or if there are no dollar
1745 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1746 save the string for later expansion in the alternate place. */
1747
1748 case opt_expand_bool:
1749 if (*s != 0 && Ustrchr(s, '$') != 0)
1750 {
1751 sprintf(CS name2, "*expand_%.50s", name);
1752 ol2 = find_option(name2, oltop, last);
1753 if (ol2 != NULL)
1754 {
1755 reset_point = sptr = read_string(s, name);
1756 if (data_block == NULL)
1757 *((uschar **)(ol2->value)) = sptr;
1758 else
1759 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1760 freesptr = FALSE;
1761 break;
1762 }
1763 }
1764 /* Fall through */
1765
1766 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1767 look for yes/not/true/false. Some booleans are stored in a single bit in
1768 a single int. There's a special fudge for verify settings; without a suffix
1769 they set both xx_sender and xx_recipient. The table points to the sender
1770 value; search subsequently for the recipient. There's another special case:
1771 opt_bool_set also notes when a boolean has been set. */
1772
1773 case opt_bool:
1774 case opt_bit:
1775 case opt_bool_verify:
1776 case opt_bool_set:
1777 if (*s != 0)
1778 {
1779 s = readconf_readname(name2, 64, s);
1780 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1781 boolvalue = TRUE;
1782 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1783 boolvalue = FALSE;
1784 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1785 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1786 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1787 US"for boolean option ", name);
1788 }
1789
1790 /* Handle single-bit type. */
1791
1792 if (type == opt_bit)
1793 {
1794 int bit = 1 << ((ol->type >> 16) & 31);
1795 int *ptr = (data_block == NULL)?
1796 (int *)(ol->value) :
1797 (int *)((uschar *)data_block + (long int)ol->value);
1798 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1799 break;
1800 }
1801
1802 /* Handle full BOOL types */
1803
1804 if (data_block == NULL)
1805 *((BOOL *)(ol->value)) = boolvalue;
1806 else
1807 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1808
1809 /* Verify fudge */
1810
1811 if (type == opt_bool_verify)
1812 {
1813 sprintf(CS name2, "%.50s_recipient", name + offset);
1814 ol2 = find_option(name2, oltop, last);
1815 if (ol2 != NULL)
1816 {
1817 if (data_block == NULL)
1818 *((BOOL *)(ol2->value)) = boolvalue;
1819 else
1820 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1821 }
1822 }
1823
1824 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1825
1826 else if (type == opt_bool_set)
1827 {
1828 sprintf(CS name2, "*set_%.50s", name + offset);
1829 ol2 = find_option(name2, oltop, last);
1830 if (ol2 != NULL)
1831 {
1832 if (data_block == NULL)
1833 *((BOOL *)(ol2->value)) = TRUE;
1834 else
1835 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1836 }
1837 }
1838 break;
1839
1840 /* Octal integer */
1841
1842 case opt_octint:
1843 intbase = 8;
1844 inttype = US"octal ";
1845
1846 /* Integer: a simple(ish) case; allow octal and hex formats, and
1847 suffixes K and M. The different types affect output, not input. */
1848
1849 case opt_mkint:
1850 case opt_int:
1851 {
1852 uschar *endptr;
1853 long int lvalue;
1854
1855 errno = 0;
1856 lvalue = strtol(CS s, CSS &endptr, intbase);
1857
1858 if (endptr == s)
1859 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1860 inttype, name);
1861
1862 if (errno != ERANGE)
1863 {
1864 if (tolower(*endptr) == 'k')
1865 {
1866 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1867 else lvalue *= 1024;
1868 endptr++;
1869 }
1870 else if (tolower(*endptr) == 'm')
1871 {
1872 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1873 errno = ERANGE;
1874 else lvalue *= 1024*1024;
1875 endptr++;
1876 }
1877 }
1878
1879 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1880 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1881 "absolute value of integer \"%s\" is too large (overflow)", s);
1882
1883 while (isspace(*endptr)) endptr++;
1884 if (*endptr != 0)
1885 extra_chars_error(endptr, inttype, US"integer value for ", name);
1886
1887 value = (int)lvalue;
1888 }
1889
1890 if (data_block == NULL)
1891 *((int *)(ol->value)) = value;
1892 else
1893 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1894 break;
1895
1896 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1897 M. */
1898
1899 case opt_Kint:
1900 {
1901 uschar *endptr;
1902 errno = 0;
1903 value = strtol(CS s, CSS &endptr, intbase);
1904
1905 if (endptr == s)
1906 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1907 inttype, name);
1908
1909 if (errno != ERANGE)
1910 {
1911 if (tolower(*endptr) == 'm')
1912 {
1913 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1914 else value *= 1024;
1915 endptr++;
1916 }
1917 else if (tolower(*endptr) == 'k')
1918 {
1919 endptr++;
1920 }
1921 else
1922 {
1923 value = (value + 512)/1024;
1924 }
1925 }
1926
1927 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1928 "absolute value of integer \"%s\" is too large (overflow)", s);
1929
1930 while (isspace(*endptr)) endptr++;
1931 if (*endptr != 0)
1932 extra_chars_error(endptr, inttype, US"integer value for ", name);
1933 }
1934
1935 if (data_block == NULL)
1936 *((int *)(ol->value)) = value;
1937 else
1938 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1939 break;
1940
1941 /* Fixed-point number: held to 3 decimal places. */
1942
1943 case opt_fixed:
1944 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1946 "fixed-point number expected for %s", name);
1947
1948 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1949 "integer \"%s\" is too large (overflow)", s);
1950
1951 value *= 1000;
1952
1953 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1954 "integer \"%s\" is too large (overflow)", s);
1955
1956 if (s[count] == '.')
1957 {
1958 int d = 100;
1959 while (isdigit(s[++count]))
1960 {
1961 value += (s[count] - '0') * d;
1962 d /= 10;
1963 }
1964 }
1965
1966 while (isspace(s[count])) count++;
1967
1968 if (s[count] != 0)
1969 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1970
1971 if (data_block == NULL)
1972 *((int *)(ol->value)) = value;
1973 else
1974 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1975 break;
1976
1977 /* There's a special routine to read time values. */
1978
1979 case opt_time:
1980 value = readconf_readtime(s, 0, FALSE);
1981 if (value < 0)
1982 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1983 name);
1984 if (data_block == NULL)
1985 *((int *)(ol->value)) = value;
1986 else
1987 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1988 break;
1989
1990 /* A time list is a list of colon-separated times, with the first
1991 element holding the size of the list and the second the number of
1992 entries used. */
1993
1994 case opt_timelist:
1995 {
1996 int count = 0;
1997 int *list = (data_block == NULL)?
1998 (int *)(ol->value) :
1999 (int *)((uschar *)data_block + (long int)(ol->value));
2000
2001 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2002 {
2003 int terminator = 0;
2004 uschar *snext = Ustrchr(s, ':');
2005 if (snext != NULL)
2006 {
2007 uschar *ss = snext;
2008 while (ss > s && isspace(ss[-1])) ss--;
2009 terminator = *ss;
2010 }
2011 value = readconf_readtime(s, terminator, FALSE);
2012 if (value < 0)
2013 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2014 name);
2015 if (count > 1 && value <= list[count])
2016 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2017 "time value out of order for %s", name);
2018 list[count+1] = value;
2019 if (snext == NULL) break;
2020 s = snext + 1;
2021 while (isspace(*s)) s++;
2022 }
2023
2024 if (count > list[0] - 2)
2025 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2026 name);
2027 if (count > 0 && list[2] == 0) count = 0;
2028 list[1] = count;
2029 }
2030
2031 break;
2032 }
2033
2034 return TRUE;
2035 }
2036
2037
2038
2039 /*************************************************
2040 * Print a time value *
2041 *************************************************/
2042
2043 /*
2044 Argument: a time value in seconds
2045 Returns: pointer to a fixed buffer containing the time as a string,
2046 in readconf_readtime() format
2047 */
2048
2049 uschar *
2050 readconf_printtime(int t)
2051 {
2052 int s, m, h, d, w;
2053 uschar *p = time_buffer;
2054
2055 if (t < 0)
2056 {
2057 *p++ = '-';
2058 t = -t;
2059 }
2060
2061 s = t % 60;
2062 t /= 60;
2063 m = t % 60;
2064 t /= 60;
2065 h = t % 24;
2066 t /= 24;
2067 d = t % 7;
2068 w = t/7;
2069
2070 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2071 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2072 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2073 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2074 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2075
2076 return time_buffer;
2077 }
2078
2079
2080
2081 /*************************************************
2082 * Print an individual option value *
2083 *************************************************/
2084
2085 /* This is used by the -bP option, so prints to the standard output.
2086 The entire options list is passed in as an argument, because some options come
2087 in pairs - typically uid/gid settings, which can either be explicit numerical
2088 values, or strings to be expanded later. If the numerical value is unset,
2089 search for "*expand_<name>" to see if there is a string equivalent.
2090
2091 Arguments:
2092 ol option entry, or NULL for an unknown option
2093 name option name
2094 options_block NULL for main configuration options; otherwise points to
2095 a driver block; if the option doesn't have opt_public
2096 set, then options_block->options_block is where the item
2097 resides.
2098 oltop points to the option list in which ol exists
2099 last one more than the offset of the last entry in optop
2100
2101 Returns: nothing
2102 */
2103
2104 static void
2105 print_ol(optionlist *ol, uschar *name, void *options_block,
2106 optionlist *oltop, int last)
2107 {
2108 struct passwd *pw;
2109 struct group *gr;
2110 optionlist *ol2;
2111 void *value;
2112 uid_t *uidlist;
2113 gid_t *gidlist;
2114 uschar *s;
2115 uschar name2[64];
2116
2117 if (ol == NULL)
2118 {
2119 printf("%s is not a known option\n", name);
2120 return;
2121 }
2122
2123 /* Non-admin callers cannot see options that have been flagged secure by the
2124 "hide" prefix. */
2125
2126 if (!admin_user && (ol->type & opt_secure) != 0)
2127 {
2128 printf("%s = <value not displayable>\n", name);
2129 return;
2130 }
2131
2132 /* Else show the value of the option */
2133
2134 value = ol->value;
2135 if (options_block != NULL)
2136 {
2137 if ((ol->type & opt_public) == 0)
2138 options_block = (void *)(((driver_instance *)options_block)->options_block);
2139 value = (void *)((uschar *)options_block + (long int)value);
2140 }
2141
2142 switch(ol->type & opt_mask)
2143 {
2144 case opt_stringptr:
2145 case opt_rewrite: /* Show the text value */
2146 s = *((uschar **)value);
2147 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2148 break;
2149
2150 case opt_int:
2151 printf("%s = %d\n", name, *((int *)value));
2152 break;
2153
2154 case opt_mkint:
2155 {
2156 int x = *((int *)value);
2157 if (x != 0 && (x & 1023) == 0)
2158 {
2159 int c = 'K';
2160 x >>= 10;
2161 if ((x & 1023) == 0)
2162 {
2163 c = 'M';
2164 x >>= 10;
2165 }
2166 printf("%s = %d%c\n", name, x, c);
2167 }
2168 else printf("%s = %d\n", name, x);
2169 }
2170 break;
2171
2172 case opt_Kint:
2173 {
2174 int x = *((int *)value);
2175 if (x == 0) printf("%s = 0\n", name);
2176 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2177 else printf("%s = %dK\n", name, x);
2178 }
2179 break;
2180
2181 case opt_octint:
2182 printf("%s = %#o\n", name, *((int *)value));
2183 break;
2184
2185 /* Can be negative only when "unset", in which case integer */
2186
2187 case opt_fixed:
2188 {
2189 int x = *((int *)value);
2190 int f = x % 1000;
2191 int d = 100;
2192 if (x < 0) printf("%s =\n", name); else
2193 {
2194 printf("%s = %d.", name, x/1000);
2195 do
2196 {
2197 printf("%d", f/d);
2198 f %= d;
2199 d /= 10;
2200 }
2201 while (f != 0);
2202 printf("\n");
2203 }
2204 }
2205 break;
2206
2207 /* If the numerical value is unset, try for the string value */
2208
2209 case opt_expand_uid:
2210 if (! *get_set_flag(name, oltop, last, options_block))
2211 {
2212 sprintf(CS name2, "*expand_%.50s", name);
2213 ol2 = find_option(name2, oltop, last);
2214 if (ol2 != NULL)
2215 {
2216 void *value2 = ol2->value;
2217 if (options_block != NULL)
2218 value2 = (void *)((uschar *)options_block + (long int)value2);
2219 s = *((uschar **)value2);
2220 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2221 break;
2222 }
2223 }
2224
2225 /* Else fall through */
2226
2227 case opt_uid:
2228 if (! *get_set_flag(name, oltop, last, options_block))
2229 printf("%s =\n", name);
2230 else
2231 {
2232 pw = getpwuid(*((uid_t *)value));
2233 if (pw == NULL)
2234 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2235 else printf("%s = %s\n", name, pw->pw_name);
2236 }
2237 break;
2238
2239 /* If the numerical value is unset, try for the string value */
2240
2241 case opt_expand_gid:
2242 if (! *get_set_flag(name, oltop, last, options_block))
2243 {
2244 sprintf(CS name2, "*expand_%.50s", name);
2245 ol2 = find_option(name2, oltop, last);
2246 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2247 {
2248 void *value2 = ol2->value;
2249 if (options_block != NULL)
2250 value2 = (void *)((uschar *)options_block + (long int)value2);
2251 s = *((uschar **)value2);
2252 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2253 break;
2254 }
2255 }
2256
2257 /* Else fall through */
2258
2259 case opt_gid:
2260 if (! *get_set_flag(name, oltop, last, options_block))
2261 printf("%s =\n", name);
2262 else
2263 {
2264 gr = getgrgid(*((int *)value));
2265 if (gr == NULL)
2266 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2267 else printf("%s = %s\n", name, gr->gr_name);
2268 }
2269 break;
2270
2271 case opt_uidlist:
2272 uidlist = *((uid_t **)value);
2273 printf("%s =", name);
2274 if (uidlist != NULL)
2275 {
2276 int i;
2277 uschar sep = ' ';
2278 for (i = 1; i <= (int)(uidlist[0]); i++)
2279 {
2280 uschar *name = NULL;
2281 pw = getpwuid(uidlist[i]);
2282 if (pw != NULL) name = US pw->pw_name;
2283 if (name != NULL) printf("%c%s", sep, name);
2284 else printf("%c%ld", sep, (long int)(uidlist[i]));
2285 sep = ':';
2286 }
2287 }
2288 printf("\n");
2289 break;
2290
2291 case opt_gidlist:
2292 gidlist = *((gid_t **)value);
2293 printf("%s =", name);
2294 if (gidlist != NULL)
2295 {
2296 int i;
2297 uschar sep = ' ';
2298 for (i = 1; i <= (int)(gidlist[0]); i++)
2299 {
2300 uschar *name = NULL;
2301 gr = getgrgid(gidlist[i]);
2302 if (gr != NULL) name = US gr->gr_name;
2303 if (name != NULL) printf("%c%s", sep, name);
2304 else printf("%c%ld", sep, (long int)(gidlist[i]));
2305 sep = ':';
2306 }
2307 }
2308 printf("\n");
2309 break;
2310
2311 case opt_time:
2312 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2313 break;
2314
2315 case opt_timelist:
2316 {
2317 int i;
2318 int *list = (int *)value;
2319 printf("%s = ", name);
2320 for (i = 0; i < list[1]; i++)
2321 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2322 printf("\n");
2323 }
2324 break;
2325
2326 case opt_bit:
2327 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2328 "" : "no_", name);
2329 break;
2330
2331 case opt_expand_bool:
2332 sprintf(CS name2, "*expand_%.50s", name);
2333 ol2 = find_option(name2, oltop, last);
2334 if (ol2 != NULL && ol2->value != NULL)
2335 {
2336 void *value2 = ol2->value;
2337 if (options_block != NULL)
2338 value2 = (void *)((uschar *)options_block + (long int)value2);
2339 s = *((uschar **)value2);
2340 if (s != NULL)
2341 {
2342 printf("%s = %s\n", name, string_printing(s));
2343 break;
2344 }
2345 /* s == NULL => string not set; fall through */
2346 }
2347
2348 /* Fall through */
2349
2350 case opt_bool:
2351 case opt_bool_verify:
2352 case opt_bool_set:
2353 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2354 break;
2355 }
2356 }
2357
2358
2359
2360 /*************************************************
2361 * Print value from main configuration *
2362 *************************************************/
2363
2364 /* This function, called as a result of encountering the -bP option,
2365 causes the value of any main configuration variable to be output if the
2366 second argument is NULL. There are some special values:
2367
2368 all print all main configuration options
2369 configure_file print the name of the configuration file
2370 routers print the routers' configurations
2371 transports print the transports' configuration
2372 authenticators print the authenticators' configuration
2373 macros print the macros' configuration
2374 router_list print a list of router names
2375 transport_list print a list of transport names
2376 authenticator_list print a list of authentication mechanism names
2377 macro_list print a list of macro names
2378 +name print a named list item
2379 local_scan print the local_scan options
2380
2381 If the second argument is not NULL, it must be one of "router", "transport",
2382 "authenticator" or "macro" in which case the first argument identifies the
2383 driver whose options are to be printed.
2384
2385 Arguments:
2386 name option name if type == NULL; else driver name
2387 type NULL or driver type name, as described above
2388
2389 Returns: nothing
2390 */
2391
2392 void
2393 readconf_print(uschar *name, uschar *type)
2394 {
2395 BOOL names_only = FALSE;
2396 optionlist *ol;
2397 optionlist *ol2 = NULL;
2398 driver_instance *d = NULL;
2399 macro_item *m;
2400 int size = 0;
2401
2402 if (type == NULL)
2403 {
2404 if (*name == '+')
2405 {
2406 int i;
2407 tree_node *t;
2408 BOOL found = FALSE;
2409 static uschar *types[] = { US"address", US"domain", US"host",
2410 US"localpart" };
2411 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2412 &hostlist_anchor, &localpartlist_anchor };
2413
2414 for (i = 0; i < 4; i++)
2415 {
2416 t = tree_search(*(anchors[i]), name+1);
2417 if (t != NULL)
2418 {
2419 found = TRUE;
2420 printf("%slist %s = %s\n", types[i], name+1,
2421 ((namedlist_block *)(t->data.ptr))->string);
2422 }
2423 }
2424
2425 if (!found)
2426 printf("no address, domain, host, or local part list called \"%s\" "
2427 "exists\n", name+1);
2428
2429 return;
2430 }
2431
2432 if (Ustrcmp(name, "configure_file") == 0)
2433 {
2434 printf("%s\n", CS config_main_filename);
2435 return;
2436 }
2437
2438 if (Ustrcmp(name, "all") == 0)
2439 {
2440 for (ol = optionlist_config;
2441 ol < optionlist_config + optionlist_config_size; ol++)
2442 {
2443 if ((ol->type & opt_hidden) == 0)
2444 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2445 }
2446 return;
2447 }
2448
2449 if (Ustrcmp(name, "local_scan") == 0)
2450 {
2451 #ifndef LOCAL_SCAN_HAS_OPTIONS
2452 printf("local_scan() options are not supported\n");
2453 #else
2454 for (ol = local_scan_options;
2455 ol < local_scan_options + local_scan_options_count; ol++)
2456 {
2457 print_ol(ol, US ol->name, NULL, local_scan_options,
2458 local_scan_options_count);
2459 }
2460 #endif
2461 return;
2462 }
2463
2464 if (Ustrcmp(name, "routers") == 0)
2465 {
2466 type = US"router";
2467 name = NULL;
2468 }
2469 else if (Ustrcmp(name, "transports") == 0)
2470 {
2471 type = US"transport";
2472 name = NULL;
2473 }
2474
2475 else if (Ustrcmp(name, "authenticators") == 0)
2476 {
2477 type = US"authenticator";
2478 name = NULL;
2479 }
2480
2481 else if (Ustrcmp(name, "macros") == 0)
2482 {
2483 type = US"macro";
2484 name = NULL;
2485 }
2486
2487 else if (Ustrcmp(name, "router_list") == 0)
2488 {
2489 type = US"router";
2490 name = NULL;
2491 names_only = TRUE;
2492 }
2493
2494 else if (Ustrcmp(name, "transport_list") == 0)
2495 {
2496 type = US"transport";
2497 name = NULL;
2498 names_only = TRUE;
2499 }
2500
2501 else if (Ustrcmp(name, "authenticator_list") == 0)
2502 {
2503 type = US"authenticator";
2504 name = NULL;
2505 names_only = TRUE;
2506 }
2507
2508 else if (Ustrcmp(name, "macro_list") == 0)
2509 {
2510 type = US"macro";
2511 name = NULL;
2512 names_only = TRUE;
2513 }
2514
2515 else
2516 {
2517 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2518 name, NULL, optionlist_config, optionlist_config_size);
2519 return;
2520 }
2521 }
2522
2523 /* Handle the options for a router or transport. Skip options that are flagged
2524 as hidden. Some of these are options with names starting with '*', used for
2525 internal alternative representations of other options (which the printing
2526 function will sort out). Others are synonyms kept for backward compatibility.
2527 */
2528
2529 if (Ustrcmp(type, "router") == 0)
2530 {
2531 d = (driver_instance *)routers;
2532 ol2 = optionlist_routers;
2533 size = optionlist_routers_size;
2534 }
2535 else if (Ustrcmp(type, "transport") == 0)
2536 {
2537 d = (driver_instance *)transports;
2538 ol2 = optionlist_transports;
2539 size = optionlist_transports_size;
2540 }
2541 else if (Ustrcmp(type, "authenticator") == 0)
2542 {
2543 d = (driver_instance *)auths;
2544 ol2 = optionlist_auths;
2545 size = optionlist_auths_size;
2546 }
2547
2548 else if (Ustrcmp(type, "macro") == 0)
2549 {
2550 /* People store passwords in macros and they were previously not available
2551 for printing. So we have an admin_users restriction. */
2552 if (!admin_user)
2553 {
2554 fprintf(stderr, "exim: permission denied\n");
2555 exit(EXIT_FAILURE);
2556 }
2557 for (m = macros; m != NULL; m = m->next)
2558 {
2559 if (name == NULL || Ustrcmp(name, m->name) == 0)
2560 {
2561 if (names_only)
2562 printf("%s\n", CS m->name);
2563 else
2564 printf("%s=%s\n", CS m->name, CS m->replacement);
2565 if (name != NULL)
2566 return;
2567 }
2568 }
2569 if (name != NULL)
2570 printf("%s %s not found\n", type, name);
2571 return;
2572 }
2573
2574 if (names_only)
2575 {
2576 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2577 return;
2578 }
2579
2580 /* Either search for a given driver, or print all of them */
2581
2582 for (; d != NULL; d = d->next)
2583 {
2584 if (name == NULL)
2585 printf("\n%s %s:\n", d->name, type);
2586 else if (Ustrcmp(d->name, name) != 0) continue;
2587
2588 for (ol = ol2; ol < ol2 + size; ol++)
2589 {
2590 if ((ol->type & opt_hidden) == 0)
2591 print_ol(ol, US ol->name, d, ol2, size);
2592 }
2593
2594 for (ol = d->info->options;
2595 ol < d->info->options + *(d->info->options_count); ol++)
2596 {
2597 if ((ol->type & opt_hidden) == 0)
2598 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2599 }
2600 if (name != NULL) return;
2601 }
2602 if (name != NULL) printf("%s %s not found\n", type, name);
2603 }
2604
2605
2606
2607 /*************************************************
2608 * Read a named list item *
2609 *************************************************/
2610
2611 /* This function reads a name and a list (i.e. string). The name is used to
2612 save the list in a tree, sorted by its name. Each entry also has a number,
2613 which can be used for caching tests, but if the string contains any expansion
2614 items other than $key, the number is set negative to inhibit caching. This
2615 mechanism is used for domain, host, and address lists that are referenced by
2616 the "+name" syntax.
2617
2618 Arguments:
2619 anchorp points to the tree anchor
2620 numberp points to the current number for this tree
2621 max the maximum number permitted
2622 s the text of the option line, starting immediately after the name
2623 of the list type
2624 tname the name of the list type, for messages
2625
2626 Returns: nothing
2627 */
2628
2629 static void
2630 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2631 uschar *tname)
2632 {
2633 BOOL forcecache = FALSE;
2634 uschar *ss;
2635 tree_node *t;
2636 namedlist_block *nb = store_get(sizeof(namedlist_block));
2637
2638 if (Ustrncmp(s, "_cache", 6) == 0)
2639 {
2640 forcecache = TRUE;
2641 s += 6;
2642 }
2643
2644 if (!isspace(*s))
2645 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2646
2647 if (*numberp >= max)
2648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2649 tname, max);
2650
2651 while (isspace(*s)) s++;
2652 ss = s;
2653 while (isalnum(*s) || *s == '_') s++;
2654 t = store_get(sizeof(tree_node) + s-ss);
2655 Ustrncpy(t->name, ss, s-ss);
2656 t->name[s-ss] = 0;
2657 while (isspace(*s)) s++;
2658
2659 if (!tree_insertnode(anchorp, t))
2660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2661 "duplicate name \"%s\" for a named %s", t->name, tname);
2662
2663 t->data.ptr = nb;
2664 nb->number = *numberp;
2665 *numberp += 1;
2666
2667 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2668 "missing '=' after \"%s\"", t->name);
2669 while (isspace(*s)) s++;
2670 nb->string = read_string(s, t->name);
2671 nb->cache_data = NULL;
2672
2673 /* Check the string for any expansions; if any are found, mark this list
2674 uncacheable unless the user has explicited forced caching. */
2675
2676 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2677 }
2678
2679
2680
2681
2682 /*************************************************
2683 * Unpick data for a rate limit *
2684 *************************************************/
2685
2686 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2687 separate values.
2688
2689 Arguments:
2690 s string, in the form t,b,f,l
2691 where t is the threshold (integer)
2692 b is the initial delay (time)
2693 f is the multiplicative factor (fixed point)
2694 k is the maximum time (time)
2695 threshold where to store threshold
2696 base where to store base in milliseconds
2697 factor where to store factor in milliseconds
2698 limit where to store limit
2699
2700 Returns: nothing (panics on error)
2701 */
2702
2703 static void
2704 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2705 int *limit)
2706 {
2707 uschar bstring[16], lstring[16];
2708
2709 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2710 factor, lstring) == 4)
2711 {
2712 *base = readconf_readtime(bstring, 0, TRUE);
2713 *limit = readconf_readtime(lstring, 0, TRUE);
2714 if (*base >= 0 && *limit >= 0) return;
2715 }
2716 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2717 }
2718
2719
2720
2721
2722 /*************************************************
2723 * Read main configuration options *
2724 *************************************************/
2725
2726 /* This function is the first to be called for configuration reading. It
2727 opens the configuration file and reads general configuration settings until
2728 it reaches the end of the configuration section. The file is then left open so
2729 that the remaining configuration data can subsequently be read if needed for
2730 this run of Exim.
2731
2732 The configuration file must be owned either by root or exim, and be writeable
2733 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2734 in the config file, so the test is done on the compiled in values. A slight
2735 anomaly, to be carefully documented.
2736
2737 The name of the configuration file is taken from a list that is included in the
2738 binary of Exim. It can be altered from the command line, but if that is done,
2739 root privilege is immediately withdrawn unless the caller is root or exim.
2740 The first file on the list that exists is used.
2741
2742 For use on multiple systems that share file systems, first look for a
2743 configuration file whose name has the current node name on the end. If that is
2744 not found, try the generic name. For really contorted configurations, that run
2745 multiple Exims with different uid settings, first try adding the effective uid
2746 before the node name. These complications are going to waste resources on most
2747 systems. Therefore they are available only when requested by compile-time
2748 options. */
2749
2750 void
2751 readconf_main(void)
2752 {
2753 int sep = 0;
2754 long dummy_l;
2755 struct stat statbuf;
2756 uschar *s, *filename;
2757 uschar *list = config_main_filelist;
2758
2759 /* Loop through the possible file names */
2760
2761 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2762 != NULL)
2763 {
2764 /* Cut out all the fancy processing unless specifically wanted */
2765
2766 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2767 uschar *suffix = filename + Ustrlen(filename);
2768
2769 /* Try for the node-specific file if a node name exists */
2770
2771 #ifdef CONFIGURE_FILE_USE_NODE
2772 struct utsname uts;
2773 if (uname(&uts) >= 0)
2774 {
2775 #ifdef CONFIGURE_FILE_USE_EUID
2776 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2777 config_file = Ufopen(filename, "rb");
2778 if (config_file == NULL)
2779 #endif /* CONFIGURE_FILE_USE_EUID */
2780 {
2781 sprintf(CS suffix, ".%.256s", uts.nodename);
2782 config_file = Ufopen(filename, "rb");
2783 }
2784 }
2785 #endif /* CONFIGURE_FILE_USE_NODE */
2786
2787 /* Otherwise, try the generic name, possibly with the euid added */
2788
2789 #ifdef CONFIGURE_FILE_USE_EUID
2790 if (config_file == NULL)
2791 {
2792 sprintf(CS suffix, ".%ld", (long int)original_euid);
2793 config_file = Ufopen(filename, "rb");
2794 }
2795 #endif /* CONFIGURE_FILE_USE_EUID */
2796
2797 /* Finally, try the unadorned name */
2798
2799 if (config_file == NULL)
2800 {
2801 *suffix = 0;
2802 config_file = Ufopen(filename, "rb");
2803 }
2804 #else /* if neither defined */
2805
2806 /* This is the common case when the fancy processing is not included. */
2807
2808 config_file = Ufopen(filename, "rb");
2809 #endif
2810
2811 /* If the file does not exist, continue to try any others. For any other
2812 error, break out (and die). */
2813
2814 if (config_file != NULL || errno != ENOENT) break;
2815 }
2816
2817 /* On success, save the name for verification; config_filename is used when
2818 logging configuration errors (it changes for .included files) whereas
2819 config_main_filename is the name shown by -bP. Failure to open a configuration
2820 file is a serious disaster. */
2821
2822 if (config_file != NULL)
2823 {
2824 config_filename = config_main_filename = string_copy(filename);
2825 }
2826 else
2827 {
2828 if (filename == NULL)
2829 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2830 "%s", config_main_filelist);
2831 else
2832 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2833 "configuration file %s", filename));
2834 }
2835
2836 /* Check the status of the file we have opened, unless it was specified on
2837 the command line, in which case privilege was given away at the start. */
2838
2839 if (!config_changed)
2840 {
2841 if (fstat(fileno(config_file), &statbuf) != 0)
2842 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2843 big_buffer);
2844
2845 if ((statbuf.st_uid != root_uid && /* owner not root */
2846 statbuf.st_uid != exim_uid /* owner not exim */
2847 #ifdef CONFIGURE_OWNER
2848 && statbuf.st_uid != config_uid /* owner not the special one */
2849 #endif
2850 ) || /* or */
2851 (statbuf.st_gid != exim_gid /* group not exim & */
2852 #ifdef CONFIGURE_GROUP
2853 && statbuf.st_gid != config_gid /* group not the special one */
2854 #endif
2855 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2856 /* or */
2857 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2858
2859 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2860 "wrong owner, group, or mode", big_buffer);
2861 }
2862
2863 /* Process the main configuration settings. They all begin with a lower case
2864 letter. If we see something starting with an upper case letter, it is taken as
2865 a macro definition. */
2866
2867 while ((s = get_config_line()) != NULL)
2868 {
2869 if (isupper(s[0])) read_macro_assignment(s);
2870
2871 else if (Ustrncmp(s, "domainlist", 10) == 0)
2872 read_named_list(&domainlist_anchor, &domainlist_count,
2873 MAX_NAMED_LIST, s+10, US"domain list");
2874
2875 else if (Ustrncmp(s, "hostlist", 8) == 0)
2876 read_named_list(&hostlist_anchor, &hostlist_count,
2877 MAX_NAMED_LIST, s+8, US"host list");
2878
2879 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2880 read_named_list(&addresslist_anchor, &addresslist_count,
2881 MAX_NAMED_LIST, s+11, US"address list");
2882
2883 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2884 read_named_list(&localpartlist_anchor, &localpartlist_count,
2885 MAX_NAMED_LIST, s+13, US"local part list");
2886
2887 else
2888 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2889 NULL, US"main option \"%s\" unknown");
2890 }
2891
2892
2893 /* If local_sender_retain is set, local_from_check must be unset. */
2894
2895 if (local_sender_retain && local_from_check)
2896 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2897 "local_sender_retain are set; this combination is not allowed");
2898
2899 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2900 wanted. */
2901
2902 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2903
2904 /* The max retry interval must not be greater than 24 hours. */
2905
2906 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2907
2908 /* remote_max_parallel must be > 0 */
2909
2910 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2911
2912 /* Save the configured setting of freeze_tell, so we can re-instate it at the
2913 start of a new SMTP message. */
2914
2915 freeze_tell_config = freeze_tell;
2916
2917 /* The primary host name may be required for expansion of spool_directory
2918 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2919 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2920 canonize it. Some people like upper case letters in their host names, so we
2921 don't force the case. */
2922
2923 if (primary_hostname == NULL)
2924 {
2925 uschar *hostname;
2926 struct utsname uts;
2927 if (uname(&uts) < 0)
2928 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2929 hostname = US uts.nodename;
2930
2931 if (Ustrchr(hostname, '.') == NULL)
2932 {
2933 int af = AF_INET;
2934 struct hostent *hostdata;
2935
2936 #if HAVE_IPV6
2937 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2938 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2939 TRUE, NULL) != OK))
2940 af = AF_INET6;
2941 #else
2942 af = AF_INET;
2943 #endif
2944
2945 for (;;)
2946 {
2947 #if HAVE_IPV6
2948 #if HAVE_GETIPNODEBYNAME
2949 int error_num;
2950 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2951 #else
2952 hostdata = gethostbyname2(CS hostname, af);
2953 #endif
2954 #else
2955 hostdata = gethostbyname(CS hostname);
2956 #endif
2957
2958 if (hostdata != NULL)
2959 {
2960 hostname = US hostdata->h_name;
2961 break;
2962 }
2963
2964 if (af == AF_INET) break;
2965 af = AF_INET;
2966 }
2967 }
2968
2969 primary_hostname = string_copy(hostname);
2970 }
2971
2972 /* Set up default value for smtp_active_hostname */
2973
2974 smtp_active_hostname = primary_hostname;
2975
2976 /* If spool_directory wasn't set in the build-time configuration, it must have
2977 got set above. Of course, writing to the log may not work if log_file_path is
2978 not set, but it will at least get to syslog or somewhere, with any luck. */
2979
2980 if (*spool_directory == 0)
2981 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2982 "proceed");
2983
2984 /* Expand the spool directory name; it may, for example, contain the primary
2985 host name. Same comment about failure. */
2986
2987 s = expand_string(spool_directory);
2988 if (s == NULL)
2989 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2990 "\"%s\": %s", spool_directory, expand_string_message);
2991 spool_directory = s;
2992
2993 /* Expand log_file_path, which must contain "%s" in any component that isn't
2994 the null string or "syslog". It is also allowed to contain one instance of %D.
2995 However, it must NOT contain % followed by anything else. */
2996
2997 if (*log_file_path != 0)
2998 {
2999 uschar *ss, *sss;
3000 int sep = ':'; /* Fixed for log file path */
3001 s = expand_string(log_file_path);
3002 if (s == NULL)
3003 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3004 "\"%s\": %s", log_file_path, expand_string_message);
3005
3006 ss = s;
3007 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3008 {
3009 uschar *t;
3010 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3011 t = Ustrstr(sss, "%s");
3012 if (t == NULL)
3013 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3014 "contain \"%%s\"", sss);
3015 *t = 'X';
3016 t = Ustrchr(sss, '%');
3017 if (t != NULL)
3018 {
3019 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
3020 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3021 "unexpected \"%%\" character", s);
3022 }
3023 }
3024
3025 log_file_path = s;
3026 }
3027
3028 /* Interpret syslog_facility into an integer argument for 'ident' param to
3029 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3030 leading "log_". */
3031
3032 if (syslog_facility_str != NULL)
3033 {
3034 int i;
3035 uschar *s = syslog_facility_str;
3036
3037 if ((Ustrlen(syslog_facility_str) >= 4) &&
3038 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3039 s += 4;
3040
3041 for (i = 0; i < syslog_list_size; i++)
3042 {
3043 if (strcmpic(s, syslog_list[i].name) == 0)
3044 {
3045 syslog_facility = syslog_list[i].value;
3046 break;
3047 }
3048 }
3049
3050 if (i >= syslog_list_size)
3051 {
3052 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3053 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3054 }
3055 }
3056
3057 /* Expand pid_file_path */
3058
3059 if (*pid_file_path != 0)
3060 {
3061 s = expand_string(pid_file_path);
3062 if (s == NULL)
3063 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3064 "\"%s\": %s", pid_file_path, expand_string_message);
3065 pid_file_path = s;
3066 }
3067
3068 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3069 message. */
3070
3071 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3072
3073 /* Unpick the SMTP rate limiting options, if set */
3074
3075 if (smtp_ratelimit_mail != NULL)
3076 {
3077 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3078 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3079 }
3080
3081 if (smtp_ratelimit_rcpt != NULL)
3082 {
3083 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3084 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3085 }
3086
3087 /* The qualify domains default to the primary host name */
3088
3089 if (qualify_domain_sender == NULL)
3090 qualify_domain_sender = primary_hostname;
3091 if (qualify_domain_recipient == NULL)
3092 qualify_domain_recipient = qualify_domain_sender;
3093
3094 /* Setting system_filter_user in the configuration sets the gid as well if a
3095 name is given, but a numerical value does not. */
3096
3097 if (system_filter_uid_set && !system_filter_gid_set)
3098 {
3099 struct passwd *pw = getpwuid(system_filter_uid);
3100 if (pw == NULL)
3101 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3102 (long int)system_filter_uid);
3103 system_filter_gid = pw->pw_gid;
3104 system_filter_gid_set = TRUE;
3105 }
3106
3107 /* If the errors_reply_to field is set, check that it is syntactically valid
3108 and ensure it contains a domain. */
3109
3110 if (errors_reply_to != NULL)
3111 {
3112 uschar *errmess;
3113 int start, end, domain;
3114 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3115 &start, &end, &domain, FALSE);
3116
3117 if (recipient == NULL)
3118 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3119 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3120
3121 if (domain == 0)
3122 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3123 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3124 }
3125
3126 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3127 smtp_accept_max must also be set. */
3128
3129 if (smtp_accept_max == 0 &&
3130 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3131 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3132 "smtp_accept_max must be set if smtp_accept_queue or "
3133 "smtp_accept_max_per_host is set");
3134
3135 /* Set up the host number if anything is specified. It is an expanded string
3136 so that it can be computed from the host name, for example. We do this last
3137 so as to ensure that everything else is set up before the expansion. */
3138
3139 if (host_number_string != NULL)
3140 {
3141 uschar *end;
3142 uschar *s = expand_string(host_number_string);
3143 long int n = Ustrtol(s, &end, 0);
3144 while (isspace(*end)) end++;
3145 if (*end != 0)
3146 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3147 "localhost_number value is not a number: %s", s);
3148 if (n > LOCALHOST_MAX)
3149 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3150 "localhost_number is greater than the maximum allowed value (%d)",
3151 LOCALHOST_MAX);
3152 host_number = n;
3153 }
3154
3155 #ifdef SUPPORT_TLS
3156 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3157
3158 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3159 tls_verify_certificates == NULL)
3160 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3161 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3162 (tls_verify_hosts != NULL)? "" : "try_");
3163
3164 /* If openssl_options is set, validate it */
3165 if (openssl_options != NULL)
3166 {
3167 # ifdef USE_GNUTLS
3168 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3169 "openssl_options is set but we're using GnuTLS\n");
3170 # else
3171 long dummy;
3172 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3173 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3174 "openssl_options parse error: %s\n", openssl_options);
3175 # endif
3176 }
3177 #endif
3178 }
3179
3180
3181
3182 /*************************************************
3183 * Initialize one driver *
3184 *************************************************/
3185
3186 /* This is called once the driver's generic options, if any, have been read.
3187 We can now find the driver, set up defaults for the private options, and
3188 unset any "set" bits in the private options table (which might have been
3189 set by another incarnation of the same driver).
3190
3191 Arguments:
3192 d pointer to driver instance block, with generic
3193 options filled in
3194 drivers_available vector of available drivers
3195 size_of_info size of each block in drivers_available
3196 class class of driver, for error message
3197
3198 Returns: pointer to the driver info block
3199 */
3200
3201 static driver_info *
3202 init_driver(driver_instance *d, driver_info *drivers_available,
3203 int size_of_info, uschar *class)
3204 {
3205 driver_info *dd;
3206
3207 for (dd = drivers_available; dd->driver_name[0] != 0;
3208 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3209 {
3210 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3211 {
3212 int i;
3213 int len = dd->options_len;
3214 d->info = dd;
3215 d->options_block = store_get(len);
3216 memcpy(d->options_block, dd->options_block, len);
3217 for (i = 0; i < *(dd->options_count); i++)
3218 dd->options[i].type &= ~opt_set;
3219 return dd;
3220 }
3221 }
3222
3223 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3224 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3225
3226 return NULL; /* never obeyed */
3227 }
3228
3229
3230
3231
3232 /*************************************************
3233 * Initialize driver list *
3234 *************************************************/
3235
3236 /* This function is called for routers, transports, and authentication
3237 mechanisms. It reads the data from the current point in the configuration file
3238 up to the end of the section, and sets up a chain of instance blocks according
3239 to the file's contents. The file will already have been opened by a call to
3240 readconf_main, and must be left open for subsequent reading of further data.
3241
3242 Any errors cause a panic crash. Note that the blocks with names driver_info and
3243 driver_instance must map the first portions of all the _info and _instance
3244 blocks for this shared code to work.
3245
3246 Arguments:
3247 class "router", "transport", or "authenticator"
3248 anchor &routers, &transports, &auths
3249 drivers_available available drivers
3250 size_of_info size of each info block
3251 instance_default points to default data for an instance
3252 instance_size size of instance block
3253 driver_optionlist generic option list
3254 driver_optionlist_count count of generic option list
3255
3256 Returns: nothing
3257 */
3258
3259 void
3260 readconf_driver_init(
3261 uschar *class,
3262 driver_instance **anchor,
3263 driver_info *drivers_available,
3264 int size_of_info,
3265 void *instance_default,
3266 int instance_size,
3267 optionlist *driver_optionlist,
3268 int driver_optionlist_count)
3269 {
3270 driver_instance **p = anchor;
3271 driver_instance *d = NULL;
3272 uschar *buffer;
3273
3274 while ((buffer = get_config_line()) != NULL)
3275 {
3276 uschar name[64];
3277 uschar *s;
3278
3279 /* Read the first name on the line and test for the start of a new driver. A
3280 macro definition indicates the end of the previous driver. If this isn't the
3281 start of a new driver, the line will be re-read. */
3282
3283 s = readconf_readname(name, sizeof(name), buffer);
3284
3285 /* Handle macro definition, first finishing off the initialization of the
3286 previous driver, if any. */
3287
3288 if (isupper(*name) && *s == '=')
3289 {
3290 if (d != NULL)
3291 {
3292 if (d->driver_name == NULL)