Allow Routers to have multiple conditions, IF each one yields a strict bool.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.42 2010/06/07 07:09:10 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 BOOL extra_condition = FALSE;
1362 optionlist *ol, *ol2;
1363 struct passwd *pw;
1364 void *reset_point;
1365 int intbase = 0;
1366 uschar *inttype = US"";
1367 uschar *sptr;
1368 uschar *s = buffer;
1369 uschar *saved_condition, *strtemp;
1370 uschar **str_target;
1371 uschar name[64];
1372 uschar name2[64];
1373
1374 /* There may be leading spaces; thereafter, we expect an option name starting
1375 with a letter. */
1376
1377 while (isspace(*s)) s++;
1378 if (!isalpha(*s))
1379 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1380
1381 /* Read the name of the option, and skip any subsequent white space. If
1382 it turns out that what we read was "hide", set the flag indicating that
1383 this is a secure option, and loop to read the next word. */
1384
1385 for (n = 0; n < 2; n++)
1386 {
1387 while (isalnum(*s) || *s == '_')
1388 {
1389 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1390 s++;
1391 }
1392 name[ptr] = 0;
1393 while (isspace(*s)) s++;
1394 if (Ustrcmp(name, "hide") != 0) break;
1395 issecure = opt_secure;
1396 ptr = 0;
1397 }
1398
1399 /* Deal with "no_" or "not_" here for booleans */
1400
1401 if (Ustrncmp(name, "no_", 3) == 0)
1402 {
1403 boolvalue = FALSE;
1404 offset = 3;
1405 }
1406
1407 if (Ustrncmp(name, "not_", 4) == 0)
1408 {
1409 boolvalue = FALSE;
1410 offset = 4;
1411 }
1412
1413 /* Search the list for the given name. A non-existent name, or an option that
1414 is set twice, is a disaster. */
1415
1416 ol = find_option(name + offset, oltop, last);
1417
1418 if (ol == NULL)
1419 {
1420 if (unknown_txt == NULL) return FALSE;
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1422 }
1423
1424 if ((ol->type & opt_set) != 0)
1425 {
1426 uschar *mname = name;
1427 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1428 if (Ustrcmp(mname, "condition") == 0)
1429 extra_condition = TRUE;
1430 else
1431 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1432 "\"%s\" option set for the second time", mname);
1433 }
1434
1435 ol->type |= opt_set | issecure;
1436 type = ol->type & opt_mask;
1437
1438 /* Types with data values must be followed by '='; the "no[t]_" prefix
1439 applies only to boolean values. */
1440
1441 if (type < opt_bool || type > opt_bool_last)
1442 {
1443 if (offset != 0)
1444 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1445 "negation prefix applied to a non-boolean option");
1446 if (*s == 0)
1447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1448 "unexpected end of line (data missing) after %s", name);
1449 if (*s != '=')
1450 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1451 }
1452
1453 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1454 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1455 ultimately expands to one of those values. */
1456
1457 else if (*s != 0 && (offset != 0 || *s != '='))
1458 extra_chars_error(s, US"boolean option ", name, US"");
1459
1460 /* Skip white space after = */
1461
1462 if (*s == '=') while (isspace((*(++s))));
1463
1464 /* If there is a data block and the opt_public flag is not set, change
1465 the data block pointer to the private options block. */
1466
1467 if (data_block != NULL && (ol->type & opt_public) == 0)
1468 data_block = (void *)(((driver_instance *)data_block)->options_block);
1469
1470 /* Now get the data according to the type. */
1471
1472 switch (type)
1473 {
1474 /* If a string value is not enclosed in quotes, it consists of
1475 the rest of the current line, verbatim. Otherwise, string escapes
1476 are processed.
1477
1478 A transport is specified as a string, which is then looked up in the
1479 list of transports. A search type is specified as one of a number of
1480 known strings.
1481
1482 A set or rewrite rules for a driver is specified as a string, which is
1483 then parsed into a suitable chain of control blocks.
1484
1485 Uids and gids are specified as strings which are then looked up in the
1486 passwd file. Lists of uids and gids are similarly specified as colon-
1487 separated strings. */
1488
1489 case opt_stringptr:
1490 case opt_uid:
1491 case opt_gid:
1492 case opt_expand_uid:
1493 case opt_expand_gid:
1494 case opt_uidlist:
1495 case opt_gidlist:
1496 case opt_rewrite:
1497
1498 reset_point = sptr = read_string(s, name);
1499
1500 /* Having read a string, we now have several different ways of using it,
1501 depending on the data type, so do another switch. If keeping the actual
1502 string is not required (because it is interpreted), freesptr is set TRUE,
1503 and at the end we reset the pool. */
1504
1505 switch (type)
1506 {
1507 /* If this was a string, set the variable to point to the new string,
1508 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1509 rules, we still keep the string (for printing), and parse the rules into a
1510 control block and flags word. */
1511
1512 case opt_stringptr:
1513 if (data_block == NULL)
1514 str_target = (uschar **)(ol->value);
1515 else
1516 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1517 if (extra_condition)
1518 {
1519 /* We already have a condition, we're conducting a crude hack to let multiple
1520 condition rules be chained together, despite storing them in text form. */
1521 saved_condition = *str_target;
1522 strtemp = string_sprintf("${if and{{bool{%s}}{bool{%s}}}}",
1523 saved_condition, sptr);
1524 *str_target = string_copy_malloc(strtemp);
1525 }
1526 else
1527 {
1528 *str_target = sptr;
1529 freesptr = FALSE;
1530 }
1531 break;
1532
1533 case opt_rewrite:
1534 if (data_block == NULL)
1535 *((uschar **)(ol->value)) = sptr;
1536 else
1537 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1538 freesptr = FALSE;
1539 if (type == opt_rewrite)
1540 {
1541 int sep = 0;
1542 int *flagptr;
1543 uschar *p = sptr;
1544 rewrite_rule **chain;
1545 optionlist *ol3;
1546
1547 sprintf(CS name2, "*%.50s_rules", name);
1548 ol2 = find_option(name2, oltop, last);
1549 sprintf(CS name2, "*%.50s_flags", name);
1550 ol3 = find_option(name2, oltop, last);
1551
1552 if (ol2 == NULL || ol3 == NULL)
1553 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1554 "rewrite rules not available for driver");
1555
1556 if (data_block == NULL)
1557 {
1558 chain = (rewrite_rule **)(ol2->value);
1559 flagptr = (int *)(ol3->value);
1560 }
1561 else
1562 {
1563 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1564 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1565 }
1566
1567 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1568 != NULL)
1569 {
1570 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1571 *chain = next;
1572 chain = &(next->next);
1573 }
1574
1575 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1576 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1577 "non-header rewrite - not allowed at transport time -");
1578 }
1579 break;
1580
1581 /* If it was an expanded uid, see if there is any expansion to be
1582 done by checking for the presence of a $ character. If there is, save it
1583 in the corresponding *expand_user option field. Otherwise, fall through
1584 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1585 of data. */
1586
1587 case opt_expand_uid:
1588 sprintf(CS name2, "*expand_%.50s", name);
1589 ol2 = find_option(name2, oltop, last);
1590 if (ol2 != NULL)
1591 {
1592 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1593
1594 if (data_block == NULL)
1595 *((uschar **)(ol2->value)) = ss;
1596 else
1597 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1598
1599 if (ss != NULL)
1600 {
1601 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1602 freesptr = FALSE;
1603 break;
1604 }
1605 }
1606
1607 /* Look up a fixed uid, and also make use of the corresponding gid
1608 if a passwd entry is returned and the gid has not been set. */
1609
1610 case opt_uid:
1611 if (!route_finduser(sptr, &pw, &uid))
1612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1613 if (data_block == NULL)
1614 *((uid_t *)(ol->value)) = uid;
1615 else
1616 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1617
1618 /* Set the flag indicating a fixed value is set */
1619
1620 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1621
1622 /* Handle matching gid if we have a passwd entry: done by finding the
1623 same name with terminating "user" changed to "group"; if not found,
1624 ignore. Also ignore if the value is already set. */
1625
1626 if (pw == NULL) break;
1627 Ustrcpy(name+Ustrlen(name)-4, "group");
1628 ol2 = find_option(name, oltop, last);
1629 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1630 (ol2->type & opt_mask) == opt_expand_gid))
1631 {
1632 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1633 if (! *set_flag)
1634 {
1635 if (data_block == NULL)
1636 *((gid_t *)(ol2->value)) = pw->pw_gid;
1637 else
1638 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1639 *set_flag = TRUE;
1640 }
1641 }
1642 break;
1643
1644 /* If it was an expanded gid, see if there is any expansion to be
1645 done by checking for the presence of a $ character. If there is, save it
1646 in the corresponding *expand_user option field. Otherwise, fall through
1647 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1648 of data. */
1649
1650 case opt_expand_gid:
1651 sprintf(CS name2, "*expand_%.50s", name);
1652 ol2 = find_option(name2, oltop, last);
1653 if (ol2 != NULL)
1654 {
1655 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1656
1657 if (data_block == NULL)
1658 *((uschar **)(ol2->value)) = ss;
1659 else
1660 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1661
1662 if (ss != NULL)
1663 {
1664 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1665 freesptr = FALSE;
1666 break;
1667 }
1668 }
1669
1670 /* Handle freestanding gid */
1671
1672 case opt_gid:
1673 if (!route_findgroup(sptr, &gid))
1674 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1675 if (data_block == NULL)
1676 *((gid_t *)(ol->value)) = gid;
1677 else
1678 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1679 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1680 break;
1681
1682 /* If it was a uid list, look up each individual entry, and build
1683 a vector of uids, with a count in the first element. Put the vector
1684 in malloc store so we can free the string. (We are reading into
1685 permanent store already.) */
1686
1687 case opt_uidlist:
1688 {
1689 int count = 1;
1690 uid_t *list;
1691 int ptr = 0;
1692 uschar *p;
1693 uschar *op = expand_string (sptr);
1694
1695 if (op == NULL)
1696 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1697 name, expand_string_message);
1698
1699 p = op;
1700 if (*p != 0) count++;
1701 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1702 list = store_malloc(count*sizeof(uid_t));
1703 list[ptr++] = (uid_t)(count - 1);
1704
1705 if (data_block == NULL)
1706 *((uid_t **)(ol->value)) = list;
1707 else
1708 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1709
1710 p = op;
1711 while (count-- > 1)
1712 {
1713 int sep = 0;
1714 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1715 if (!route_finduser(big_buffer, NULL, &uid))
1716 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1717 big_buffer);
1718 list[ptr++] = uid;
1719 }
1720 }
1721 break;
1722
1723 /* If it was a gid list, look up each individual entry, and build
1724 a vector of gids, with a count in the first element. Put the vector
1725 in malloc store so we can free the string. (We are reading into permanent
1726 store already.) */
1727
1728 case opt_gidlist:
1729 {
1730 int count = 1;
1731 gid_t *list;
1732 int ptr = 0;
1733 uschar *p;
1734 uschar *op = expand_string (sptr);
1735
1736 if (op == NULL)
1737 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1738 name, expand_string_message);
1739
1740 p = op;
1741 if (*p != 0) count++;
1742 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1743 list = store_malloc(count*sizeof(gid_t));
1744 list[ptr++] = (gid_t)(count - 1);
1745
1746 if (data_block == NULL)
1747 *((gid_t **)(ol->value)) = list;
1748 else
1749 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1750
1751 p = op;
1752 while (count-- > 1)
1753 {
1754 int sep = 0;
1755 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1756 if (!route_findgroup(big_buffer, &gid))
1757 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1758 big_buffer);
1759 list[ptr++] = gid;
1760 }
1761 }
1762 break;
1763 }
1764
1765 /* Release store if the value of the string doesn't need to be kept. */
1766
1767 if (freesptr) store_reset(reset_point);
1768 break;
1769
1770 /* Expanded boolean: if no characters follow, or if there are no dollar
1771 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1772 save the string for later expansion in the alternate place. */
1773
1774 case opt_expand_bool:
1775 if (*s != 0 && Ustrchr(s, '$') != 0)
1776 {
1777 sprintf(CS name2, "*expand_%.50s", name);
1778 ol2 = find_option(name2, oltop, last);
1779 if (ol2 != NULL)
1780 {
1781 reset_point = sptr = read_string(s, name);
1782 if (data_block == NULL)
1783 *((uschar **)(ol2->value)) = sptr;
1784 else
1785 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1786 freesptr = FALSE;
1787 break;
1788 }
1789 }
1790 /* Fall through */
1791
1792 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1793 look for yes/not/true/false. Some booleans are stored in a single bit in
1794 a single int. There's a special fudge for verify settings; without a suffix
1795 they set both xx_sender and xx_recipient. The table points to the sender
1796 value; search subsequently for the recipient. There's another special case:
1797 opt_bool_set also notes when a boolean has been set. */
1798
1799 case opt_bool:
1800 case opt_bit:
1801 case opt_bool_verify:
1802 case opt_bool_set:
1803 if (*s != 0)
1804 {
1805 s = readconf_readname(name2, 64, s);
1806 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1807 boolvalue = TRUE;
1808 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1809 boolvalue = FALSE;
1810 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1811 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1812 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1813 US"for boolean option ", name);
1814 }
1815
1816 /* Handle single-bit type. */
1817
1818 if (type == opt_bit)
1819 {
1820 int bit = 1 << ((ol->type >> 16) & 31);
1821 int *ptr = (data_block == NULL)?
1822 (int *)(ol->value) :
1823 (int *)((uschar *)data_block + (long int)ol->value);
1824 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1825 break;
1826 }
1827
1828 /* Handle full BOOL types */
1829
1830 if (data_block == NULL)
1831 *((BOOL *)(ol->value)) = boolvalue;
1832 else
1833 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1834
1835 /* Verify fudge */
1836
1837 if (type == opt_bool_verify)
1838 {
1839 sprintf(CS name2, "%.50s_recipient", name + offset);
1840 ol2 = find_option(name2, oltop, last);
1841 if (ol2 != NULL)
1842 {
1843 if (data_block == NULL)
1844 *((BOOL *)(ol2->value)) = boolvalue;
1845 else
1846 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1847 }
1848 }
1849
1850 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1851
1852 else if (type == opt_bool_set)
1853 {
1854 sprintf(CS name2, "*set_%.50s", name + offset);
1855 ol2 = find_option(name2, oltop, last);
1856 if (ol2 != NULL)
1857 {
1858 if (data_block == NULL)
1859 *((BOOL *)(ol2->value)) = TRUE;
1860 else
1861 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1862 }
1863 }
1864 break;
1865
1866 /* Octal integer */
1867
1868 case opt_octint:
1869 intbase = 8;
1870 inttype = US"octal ";
1871
1872 /* Integer: a simple(ish) case; allow octal and hex formats, and
1873 suffixes K and M. The different types affect output, not input. */
1874
1875 case opt_mkint:
1876 case opt_int:
1877 {
1878 uschar *endptr;
1879 long int lvalue;
1880
1881 errno = 0;
1882 lvalue = strtol(CS s, CSS &endptr, intbase);
1883
1884 if (endptr == s)
1885 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1886 inttype, name);
1887
1888 if (errno != ERANGE)
1889 {
1890 if (tolower(*endptr) == 'k')
1891 {
1892 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1893 else lvalue *= 1024;
1894 endptr++;
1895 }
1896 else if (tolower(*endptr) == 'm')
1897 {
1898 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1899 errno = ERANGE;
1900 else lvalue *= 1024*1024;
1901 endptr++;
1902 }
1903 }
1904
1905 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1906 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1907 "absolute value of integer \"%s\" is too large (overflow)", s);
1908
1909 while (isspace(*endptr)) endptr++;
1910 if (*endptr != 0)
1911 extra_chars_error(endptr, inttype, US"integer value for ", name);
1912
1913 value = (int)lvalue;
1914 }
1915
1916 if (data_block == NULL)
1917 *((int *)(ol->value)) = value;
1918 else
1919 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1920 break;
1921
1922 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1923 M. */
1924
1925 case opt_Kint:
1926 {
1927 uschar *endptr;
1928 errno = 0;
1929 value = strtol(CS s, CSS &endptr, intbase);
1930
1931 if (endptr == s)
1932 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1933 inttype, name);
1934
1935 if (errno != ERANGE)
1936 {
1937 if (tolower(*endptr) == 'm')
1938 {
1939 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1940 else value *= 1024;
1941 endptr++;
1942 }
1943 else if (tolower(*endptr) == 'k')
1944 {
1945 endptr++;
1946 }
1947 else
1948 {
1949 value = (value + 512)/1024;
1950 }
1951 }
1952
1953 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1954 "absolute value of integer \"%s\" is too large (overflow)", s);
1955
1956 while (isspace(*endptr)) endptr++;
1957 if (*endptr != 0)
1958 extra_chars_error(endptr, inttype, US"integer value for ", name);
1959 }
1960
1961 if (data_block == NULL)
1962 *((int *)(ol->value)) = value;
1963 else
1964 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1965 break;
1966
1967 /* Fixed-point number: held to 3 decimal places. */
1968
1969 case opt_fixed:
1970 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1971 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1972 "fixed-point number expected for %s", name);
1973
1974 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1975 "integer \"%s\" is too large (overflow)", s);
1976
1977 value *= 1000;
1978
1979 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1980 "integer \"%s\" is too large (overflow)", s);
1981
1982 if (s[count] == '.')
1983 {
1984 int d = 100;
1985 while (isdigit(s[++count]))
1986 {
1987 value += (s[count] - '0') * d;
1988 d /= 10;
1989 }
1990 }
1991
1992 while (isspace(s[count])) count++;
1993
1994 if (s[count] != 0)
1995 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1996
1997 if (data_block == NULL)
1998 *((int *)(ol->value)) = value;
1999 else
2000 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2001 break;
2002
2003 /* There's a special routine to read time values. */
2004
2005 case opt_time:
2006 value = readconf_readtime(s, 0, FALSE);
2007 if (value < 0)
2008 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2009 name);
2010 if (data_block == NULL)
2011 *((int *)(ol->value)) = value;
2012 else
2013 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2014 break;
2015
2016 /* A time list is a list of colon-separated times, with the first
2017 element holding the size of the list and the second the number of
2018 entries used. */
2019
2020 case opt_timelist:
2021 {
2022 int count = 0;
2023 int *list = (data_block == NULL)?
2024 (int *)(ol->value) :
2025 (int *)((uschar *)data_block + (long int)(ol->value));
2026
2027 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2028 {
2029 int terminator = 0;
2030 uschar *snext = Ustrchr(s, ':');
2031 if (snext != NULL)
2032 {
2033 uschar *ss = snext;
2034 while (ss > s && isspace(ss[-1])) ss--;
2035 terminator = *ss;
2036 }
2037 value = readconf_readtime(s, terminator, FALSE);
2038 if (value < 0)
2039 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2040 name);
2041 if (count > 1 && value <= list[count])
2042 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2043 "time value out of order for %s", name);
2044 list[count+1] = value;
2045 if (snext == NULL) break;
2046 s = snext + 1;
2047 while (isspace(*s)) s++;
2048 }
2049
2050 if (count > list[0] - 2)
2051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2052 name);
2053 if (count > 0 && list[2] == 0) count = 0;
2054 list[1] = count;
2055 }
2056
2057 break;
2058 }
2059
2060 return TRUE;
2061 }
2062
2063
2064
2065 /*************************************************
2066 * Print a time value *
2067 *************************************************/
2068
2069 /*
2070 Argument: a time value in seconds
2071 Returns: pointer to a fixed buffer containing the time as a string,
2072 in readconf_readtime() format
2073 */
2074
2075 uschar *
2076 readconf_printtime(int t)
2077 {
2078 int s, m, h, d, w;
2079 uschar *p = time_buffer;
2080
2081 if (t < 0)
2082 {
2083 *p++ = '-';
2084 t = -t;
2085 }
2086
2087 s = t % 60;
2088 t /= 60;
2089 m = t % 60;
2090 t /= 60;
2091 h = t % 24;
2092 t /= 24;
2093 d = t % 7;
2094 w = t/7;
2095
2096 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2097 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2098 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2099 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2100 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2101
2102 return time_buffer;
2103 }
2104
2105
2106
2107 /*************************************************
2108 * Print an individual option value *
2109 *************************************************/
2110
2111 /* This is used by the -bP option, so prints to the standard output.
2112 The entire options list is passed in as an argument, because some options come
2113 in pairs - typically uid/gid settings, which can either be explicit numerical
2114 values, or strings to be expanded later. If the numerical value is unset,
2115 search for "*expand_<name>" to see if there is a string equivalent.
2116
2117 Arguments:
2118 ol option entry, or NULL for an unknown option
2119 name option name
2120 options_block NULL for main configuration options; otherwise points to
2121 a driver block; if the option doesn't have opt_public
2122 set, then options_block->options_block is where the item
2123 resides.
2124 oltop points to the option list in which ol exists
2125 last one more than the offset of the last entry in optop
2126
2127 Returns: nothing
2128 */
2129
2130 static void
2131 print_ol(optionlist *ol, uschar *name, void *options_block,
2132 optionlist *oltop, int last)
2133 {
2134 struct passwd *pw;
2135 struct group *gr;
2136 optionlist *ol2;
2137 void *value;
2138 uid_t *uidlist;
2139 gid_t *gidlist;
2140 uschar *s;
2141 uschar name2[64];
2142
2143 if (ol == NULL)
2144 {
2145 printf("%s is not a known option\n", name);
2146 return;
2147 }
2148
2149 /* Non-admin callers cannot see options that have been flagged secure by the
2150 "hide" prefix. */
2151
2152 if (!admin_user && (ol->type & opt_secure) != 0)
2153 {
2154 printf("%s = <value not displayable>\n", name);
2155 return;
2156 }
2157
2158 /* Else show the value of the option */
2159
2160 value = ol->value;
2161 if (options_block != NULL)
2162 {
2163 if ((ol->type & opt_public) == 0)
2164 options_block = (void *)(((driver_instance *)options_block)->options_block);
2165 value = (void *)((uschar *)options_block + (long int)value);
2166 }
2167
2168 switch(ol->type & opt_mask)
2169 {
2170 case opt_stringptr:
2171 case opt_rewrite: /* Show the text value */
2172 s = *((uschar **)value);
2173 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2174 break;
2175
2176 case opt_int:
2177 printf("%s = %d\n", name, *((int *)value));
2178 break;
2179
2180 case opt_mkint:
2181 {
2182 int x = *((int *)value);
2183 if (x != 0 && (x & 1023) == 0)
2184 {
2185 int c = 'K';
2186 x >>= 10;
2187 if ((x & 1023) == 0)
2188 {
2189 c = 'M';
2190 x >>= 10;
2191 }
2192 printf("%s = %d%c\n", name, x, c);
2193 }
2194 else printf("%s = %d\n", name, x);
2195 }
2196 break;
2197
2198 case opt_Kint:
2199 {
2200 int x = *((int *)value);
2201 if (x == 0) printf("%s = 0\n", name);
2202 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2203 else printf("%s = %dK\n", name, x);
2204 }
2205 break;
2206
2207 case opt_octint:
2208 printf("%s = %#o\n", name, *((int *)value));
2209 break;
2210
2211 /* Can be negative only when "unset", in which case integer */
2212
2213 case opt_fixed:
2214 {
2215 int x = *((int *)value);
2216 int f = x % 1000;
2217 int d = 100;
2218 if (x < 0) printf("%s =\n", name); else
2219 {
2220 printf("%s = %d.", name, x/1000);
2221 do
2222 {
2223 printf("%d", f/d);
2224 f %= d;
2225 d /= 10;
2226 }
2227 while (f != 0);
2228 printf("\n");
2229 }
2230 }
2231 break;
2232
2233 /* If the numerical value is unset, try for the string value */
2234
2235 case opt_expand_uid:
2236 if (! *get_set_flag(name, oltop, last, options_block))
2237 {
2238 sprintf(CS name2, "*expand_%.50s", name);
2239 ol2 = find_option(name2, oltop, last);
2240 if (ol2 != NULL)
2241 {
2242 void *value2 = ol2->value;
2243 if (options_block != NULL)
2244 value2 = (void *)((uschar *)options_block + (long int)value2);
2245 s = *((uschar **)value2);
2246 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2247 break;
2248 }
2249 }
2250
2251 /* Else fall through */
2252
2253 case opt_uid:
2254 if (! *get_set_flag(name, oltop, last, options_block))
2255 printf("%s =\n", name);
2256 else
2257 {
2258 pw = getpwuid(*((uid_t *)value));
2259 if (pw == NULL)
2260 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2261 else printf("%s = %s\n", name, pw->pw_name);
2262 }
2263 break;
2264
2265 /* If the numerical value is unset, try for the string value */
2266
2267 case opt_expand_gid:
2268 if (! *get_set_flag(name, oltop, last, options_block))
2269 {
2270 sprintf(CS name2, "*expand_%.50s", name);
2271 ol2 = find_option(name2, oltop, last);
2272 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2273 {
2274 void *value2 = ol2->value;
2275 if (options_block != NULL)
2276 value2 = (void *)((uschar *)options_block + (long int)value2);
2277 s = *((uschar **)value2);
2278 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2279 break;
2280 }
2281 }
2282
2283 /* Else fall through */
2284
2285 case opt_gid:
2286 if (! *get_set_flag(name, oltop, last, options_block))
2287 printf("%s =\n", name);
2288 else
2289 {
2290 gr = getgrgid(*((int *)value));
2291 if (gr == NULL)
2292 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2293 else printf("%s = %s\n", name, gr->gr_name);
2294 }
2295 break;
2296
2297 case opt_uidlist:
2298 uidlist = *((uid_t **)value);
2299 printf("%s =", name);
2300 if (uidlist != NULL)
2301 {
2302 int i;
2303 uschar sep = ' ';
2304 for (i = 1; i <= (int)(uidlist[0]); i++)
2305 {
2306 uschar *name = NULL;
2307 pw = getpwuid(uidlist[i]);
2308 if (pw != NULL) name = US pw->pw_name;
2309 if (name != NULL) printf("%c%s", sep, name);
2310 else printf("%c%ld", sep, (long int)(uidlist[i]));
2311 sep = ':';
2312 }
2313 }
2314 printf("\n");
2315 break;
2316
2317 case opt_gidlist:
2318 gidlist = *((gid_t **)value);
2319 printf("%s =", name);
2320 if (gidlist != NULL)
2321 {
2322 int i;
2323 uschar sep = ' ';
2324 for (i = 1; i <= (int)(gidlist[0]); i++)
2325 {
2326 uschar *name = NULL;
2327 gr = getgrgid(gidlist[i]);
2328 if (gr != NULL) name = US gr->gr_name;
2329 if (name != NULL) printf("%c%s", sep, name);
2330 else printf("%c%ld", sep, (long int)(gidlist[i]));
2331 sep = ':';
2332 }
2333 }
2334 printf("\n");
2335 break;
2336
2337 case opt_time:
2338 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2339 break;
2340
2341 case opt_timelist:
2342 {
2343 int i;
2344 int *list = (int *)value;
2345 printf("%s = ", name);
2346 for (i = 0; i < list[1]; i++)
2347 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2348 printf("\n");
2349 }
2350 break;
2351
2352 case opt_bit:
2353 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2354 "" : "no_", name);
2355 break;
2356
2357 case opt_expand_bool:
2358 sprintf(CS name2, "*expand_%.50s", name);
2359 ol2 = find_option(name2, oltop, last);
2360 if (ol2 != NULL && ol2->value != NULL)
2361 {
2362 void *value2 = ol2->value;
2363 if (options_block != NULL)
2364 value2 = (void *)((uschar *)options_block + (long int)value2);
2365 s = *((uschar **)value2);
2366 if (s != NULL)
2367 {
2368 printf("%s = %s\n", name, string_printing(s));
2369 break;
2370 }
2371 /* s == NULL => string not set; fall through */
2372 }
2373
2374 /* Fall through */
2375
2376 case opt_bool:
2377 case opt_bool_verify:
2378 case opt_bool_set:
2379 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2380 break;
2381 }
2382 }
2383
2384
2385
2386 /*************************************************
2387 * Print value from main configuration *
2388 *************************************************/
2389
2390 /* This function, called as a result of encountering the -bP option,
2391 causes the value of any main configuration variable to be output if the
2392 second argument is NULL. There are some special values:
2393
2394 all print all main configuration options
2395 configure_file print the name of the configuration file
2396 routers print the routers' configurations
2397 transports print the transports' configuration
2398 authenticators print the authenticators' configuration
2399 macros print the macros' configuration
2400 router_list print a list of router names
2401 transport_list print a list of transport names
2402 authenticator_list print a list of authentication mechanism names
2403 macro_list print a list of macro names
2404 +name print a named list item
2405 local_scan print the local_scan options
2406
2407 If the second argument is not NULL, it must be one of "router", "transport",
2408 "authenticator" or "macro" in which case the first argument identifies the
2409 driver whose options are to be printed.
2410
2411 Arguments:
2412 name option name if type == NULL; else driver name
2413 type NULL or driver type name, as described above
2414
2415 Returns: nothing
2416 */
2417
2418 void
2419 readconf_print(uschar *name, uschar *type)
2420 {
2421 BOOL names_only = FALSE;
2422 optionlist *ol;
2423 optionlist *ol2 = NULL;
2424 driver_instance *d = NULL;
2425 macro_item *m;
2426 int size = 0;
2427
2428 if (type == NULL)
2429 {
2430 if (*name == '+')
2431 {
2432 int i;
2433 tree_node *t;
2434 BOOL found = FALSE;
2435 static uschar *types[] = { US"address", US"domain", US"host",
2436 US"localpart" };
2437 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2438 &hostlist_anchor, &localpartlist_anchor };
2439
2440 for (i = 0; i < 4; i++)
2441 {
2442 t = tree_search(*(anchors[i]), name+1);
2443 if (t != NULL)
2444 {
2445 found = TRUE;
2446 printf("%slist %s = %s\n", types[i], name+1,
2447 ((namedlist_block *)(t->data.ptr))->string);
2448 }
2449 }
2450
2451 if (!found)
2452 printf("no address, domain, host, or local part list called \"%s\" "
2453 "exists\n", name+1);
2454
2455 return;
2456 }
2457
2458 if (Ustrcmp(name, "configure_file") == 0)
2459 {
2460 printf("%s\n", CS config_main_filename);
2461 return;
2462 }
2463
2464 if (Ustrcmp(name, "all") == 0)
2465 {
2466 for (ol = optionlist_config;
2467 ol < optionlist_config + optionlist_config_size; ol++)
2468 {
2469 if ((ol->type & opt_hidden) == 0)
2470 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2471 }
2472 return;
2473 }
2474
2475 if (Ustrcmp(name, "local_scan") == 0)
2476 {
2477 #ifndef LOCAL_SCAN_HAS_OPTIONS
2478 printf("local_scan() options are not supported\n");
2479 #else
2480 for (ol = local_scan_options;
2481 ol < local_scan_options + local_scan_options_count; ol++)
2482 {
2483 print_ol(ol, US ol->name, NULL, local_scan_options,
2484 local_scan_options_count);
2485 }
2486 #endif
2487 return;
2488 }
2489
2490 if (Ustrcmp(name, "routers") == 0)
2491 {
2492 type = US"router";
2493 name = NULL;
2494 }
2495 else if (Ustrcmp(name, "transports") == 0)
2496 {
2497 type = US"transport";
2498 name = NULL;
2499 }
2500
2501 else if (Ustrcmp(name, "authenticators") == 0)
2502 {
2503 type = US"authenticator";
2504 name = NULL;
2505 }
2506
2507 else if (Ustrcmp(name, "macros") == 0)
2508 {
2509 type = US"macro";
2510 name = NULL;
2511 }
2512
2513 else if (Ustrcmp(name, "router_list") == 0)
2514 {
2515 type = US"router";
2516 name = NULL;
2517 names_only = TRUE;
2518 }
2519
2520 else if (Ustrcmp(name, "transport_list") == 0)
2521 {
2522 type = US"transport";
2523 name = NULL;
2524 names_only = TRUE;
2525 }
2526
2527 else if (Ustrcmp(name, "authenticator_list") == 0)
2528 {
2529 type = US"authenticator";
2530 name = NULL;
2531 names_only = TRUE;
2532 }
2533
2534 else if (Ustrcmp(name, "macro_list") == 0)
2535 {
2536 type = US"macro";
2537 name = NULL;
2538 names_only = TRUE;
2539 }
2540
2541 else
2542 {
2543 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2544 name, NULL, optionlist_config, optionlist_config_size);
2545 return;
2546 }
2547 }
2548
2549 /* Handle the options for a router or transport. Skip options that are flagged
2550 as hidden. Some of these are options with names starting with '*', used for
2551 internal alternative representations of other options (which the printing
2552 function will sort out). Others are synonyms kept for backward compatibility.
2553 */
2554
2555 if (Ustrcmp(type, "router") == 0)
2556 {
2557 d = (driver_instance *)routers;
2558 ol2 = optionlist_routers;
2559 size = optionlist_routers_size;
2560 }
2561 else if (Ustrcmp(type, "transport") == 0)
2562 {
2563 d = (driver_instance *)transports;
2564 ol2 = optionlist_transports;
2565 size = optionlist_transports_size;
2566 }
2567 else if (Ustrcmp(type, "authenticator") == 0)
2568 {
2569 d = (driver_instance *)auths;
2570 ol2 = optionlist_auths;
2571 size = optionlist_auths_size;
2572 }
2573
2574 else if (Ustrcmp(type, "macro") == 0)
2575 {
2576 /* People store passwords in macros and they were previously not available
2577 for printing. So we have an admin_users restriction. */
2578 if (!admin_user)
2579 {
2580 fprintf(stderr, "exim: permission denied\n");
2581 exit(EXIT_FAILURE);
2582 }
2583 for (m = macros; m != NULL; m = m->next)
2584 {
2585 if (name == NULL || Ustrcmp(name, m->name) == 0)
2586 {
2587 if (names_only)
2588 printf("%s\n", CS m->name);
2589 else
2590 printf("%s=%s\n", CS m->name, CS m->replacement);
2591 if (name != NULL)
2592 return;
2593 }
2594 }
2595 if (name != NULL)
2596 printf("%s %s not found\n", type, name);
2597 return;
2598 }
2599
2600 if (names_only)
2601 {
2602 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2603 return;
2604 }
2605
2606 /* Either search for a given driver, or print all of them */
2607
2608 for (; d != NULL; d = d->next)
2609 {
2610 if (name == NULL)
2611 printf("\n%s %s:\n", d->name, type);
2612 else if (Ustrcmp(d->name, name) != 0) continue;
2613
2614 for (ol = ol2; ol < ol2 + size; ol++)
2615 {
2616 if ((ol->type & opt_hidden) == 0)
2617 print_ol(ol, US ol->name, d, ol2, size);
2618 }
2619
2620 for (ol = d->info->options;
2621 ol < d->info->options + *(d->info->options_count); ol++)
2622 {
2623 if ((ol->type & opt_hidden) == 0)
2624 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2625 }
2626 if (name != NULL) return;
2627 }
2628 if (name != NULL) printf("%s %s not found\n", type, name);
2629 }
2630
2631
2632
2633 /*************************************************
2634 * Read a named list item *
2635 *************************************************/
2636
2637 /* This function reads a name and a list (i.e. string). The name is used to
2638 save the list in a tree, sorted by its name. Each entry also has a number,
2639 which can be used for caching tests, but if the string contains any expansion
2640 items other than $key, the number is set negative to inhibit caching. This
2641 mechanism is used for domain, host, and address lists that are referenced by
2642 the "+name" syntax.
2643
2644 Arguments:
2645 anchorp points to the tree anchor
2646 numberp points to the current number for this tree
2647 max the maximum number permitted
2648 s the text of the option line, starting immediately after the name
2649 of the list type
2650 tname the name of the list type, for messages
2651
2652 Returns: nothing
2653 */
2654
2655 static void
2656 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2657 uschar *tname)
2658 {
2659 BOOL forcecache = FALSE;
2660 uschar *ss;
2661 tree_node *t;
2662 namedlist_block *nb = store_get(sizeof(namedlist_block));
2663
2664 if (Ustrncmp(s, "_cache", 6) == 0)
2665 {
2666 forcecache = TRUE;
2667 s += 6;
2668 }
2669
2670 if (!isspace(*s))
2671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2672
2673 if (*numberp >= max)
2674 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2675 tname, max);
2676
2677 while (isspace(*s)) s++;
2678 ss = s;
2679 while (isalnum(*s) || *s == '_') s++;
2680 t = store_get(sizeof(tree_node) + s-ss);
2681 Ustrncpy(t->name, ss, s-ss);
2682 t->name[s-ss] = 0;
2683 while (isspace(*s)) s++;
2684
2685 if (!tree_insertnode(anchorp, t))
2686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2687 "duplicate name \"%s\" for a named %s", t->name, tname);
2688
2689 t->data.ptr = nb;
2690 nb->number = *numberp;
2691 *numberp += 1;
2692
2693 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2694 "missing '=' after \"%s\"", t->name);
2695 while (isspace(*s)) s++;
2696 nb->string = read_string(s, t->name);
2697 nb->cache_data = NULL;
2698
2699 /* Check the string for any expansions; if any are found, mark this list
2700 uncacheable unless the user has explicited forced caching. */
2701
2702 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2703 }
2704
2705
2706
2707
2708 /*************************************************
2709 * Unpick data for a rate limit *
2710 *************************************************/
2711
2712 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2713 separate values.
2714
2715 Arguments:
2716 s string, in the form t,b,f,l
2717 where t is the threshold (integer)
2718 b is the initial delay (time)
2719 f is the multiplicative factor (fixed point)
2720 k is the maximum time (time)
2721 threshold where to store threshold
2722 base where to store base in milliseconds
2723 factor where to store factor in milliseconds
2724 limit where to store limit
2725
2726 Returns: nothing (panics on error)
2727 */
2728
2729 static void
2730 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2731 int *limit)
2732 {
2733 uschar bstring[16], lstring[16];
2734
2735 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2736 factor, lstring) == 4)
2737 {
2738 *base = readconf_readtime(bstring, 0, TRUE);
2739 *limit = readconf_readtime(lstring, 0, TRUE);
2740 if (*base >= 0 && *limit >= 0) return;
2741 }
2742 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2743 }
2744
2745
2746
2747
2748 /*************************************************
2749 * Read main configuration options *
2750 *************************************************/
2751
2752 /* This function is the first to be called for configuration reading. It
2753 opens the configuration file and reads general configuration settings until
2754 it reaches the end of the configuration section. The file is then left open so
2755 that the remaining configuration data can subsequently be read if needed for
2756 this run of Exim.
2757
2758 The configuration file must be owned either by root or exim, and be writeable
2759 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2760 in the config file, so the test is done on the compiled in values. A slight
2761 anomaly, to be carefully documented.
2762
2763 The name of the configuration file is taken from a list that is included in the
2764 binary of Exim. It can be altered from the command line, but if that is done,
2765 root privilege is immediately withdrawn unless the caller is root or exim.
2766 The first file on the list that exists is used.
2767
2768 For use on multiple systems that share file systems, first look for a
2769 configuration file whose name has the current node name on the end. If that is
2770 not found, try the generic name. For really contorted configurations, that run
2771 multiple Exims with different uid settings, first try adding the effective uid
2772 before the node name. These complications are going to waste resources on most
2773 systems. Therefore they are available only when requested by compile-time
2774 options. */
2775
2776 void
2777 readconf_main(void)
2778 {
2779 int sep = 0;
2780 struct stat statbuf;
2781 uschar *s, *filename;
2782 uschar *list = config_main_filelist;
2783
2784 /* Loop through the possible file names */
2785
2786 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2787 != NULL)
2788 {
2789 /* Cut out all the fancy processing unless specifically wanted */
2790
2791 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2792 uschar *suffix = filename + Ustrlen(filename);
2793
2794 /* Try for the node-specific file if a node name exists */
2795
2796 #ifdef CONFIGURE_FILE_USE_NODE
2797 struct utsname uts;
2798 if (uname(&uts) >= 0)
2799 {
2800 #ifdef CONFIGURE_FILE_USE_EUID
2801 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2802 config_file = Ufopen(filename, "rb");
2803 if (config_file == NULL)
2804 #endif /* CONFIGURE_FILE_USE_EUID */
2805 {
2806 sprintf(CS suffix, ".%.256s", uts.nodename);
2807 config_file = Ufopen(filename, "rb");
2808 }
2809 }
2810 #endif /* CONFIGURE_FILE_USE_NODE */
2811
2812 /* Otherwise, try the generic name, possibly with the euid added */
2813
2814 #ifdef CONFIGURE_FILE_USE_EUID
2815 if (config_file == NULL)
2816 {
2817 sprintf(CS suffix, ".%ld", (long int)original_euid);
2818 config_file = Ufopen(filename, "rb");
2819 }
2820 #endif /* CONFIGURE_FILE_USE_EUID */
2821
2822 /* Finally, try the unadorned name */
2823
2824 if (config_file == NULL)
2825 {
2826 *suffix = 0;
2827 config_file = Ufopen(filename, "rb");
2828 }
2829 #else /* if neither defined */
2830
2831 /* This is the common case when the fancy processing is not included. */
2832
2833 config_file = Ufopen(filename, "rb");
2834 #endif
2835
2836 /* If the file does not exist, continue to try any others. For any other
2837 error, break out (and die). */
2838
2839 if (config_file != NULL || errno != ENOENT) break;
2840 }
2841
2842 /* On success, save the name for verification; config_filename is used when
2843 logging configuration errors (it changes for .included files) whereas
2844 config_main_filename is the name shown by -bP. Failure to open a configuration
2845 file is a serious disaster. */
2846
2847 if (config_file != NULL)
2848 {
2849 config_filename = config_main_filename = string_copy(filename);
2850 }
2851 else
2852 {
2853 if (filename == NULL)
2854 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2855 "%s", config_main_filelist);
2856 else
2857 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2858 "configuration file %s", filename));
2859 }
2860
2861 /* Check the status of the file we have opened, unless it was specified on
2862 the command line, in which case privilege was given away at the start. */
2863
2864 if (!config_changed)
2865 {
2866 if (fstat(fileno(config_file), &statbuf) != 0)
2867 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2868 big_buffer);
2869
2870 if ((statbuf.st_uid != root_uid && /* owner not root */
2871 statbuf.st_uid != exim_uid /* owner not exim */
2872 #ifdef CONFIGURE_OWNER
2873 && statbuf.st_uid != config_uid /* owner not the special one */
2874 #endif
2875 ) || /* or */
2876 (statbuf.st_gid != exim_gid /* group not exim & */
2877 #ifdef CONFIGURE_GROUP
2878 && statbuf.st_gid != config_gid /* group not the special one */
2879 #endif
2880 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2881 /* or */
2882 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2883
2884 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2885 "wrong owner, group, or mode", big_buffer);
2886 }
2887
2888 /* Process the main configuration settings. They all begin with a lower case
2889 letter. If we see something starting with an upper case letter, it is taken as
2890 a macro definition. */
2891
2892 while ((s = get_config_line()) != NULL)
2893 {
2894 if (isupper(s[0])) read_macro_assignment(s);
2895
2896 else if (Ustrncmp(s, "domainlist", 10) == 0)
2897 read_named_list(&domainlist_anchor, &domainlist_count,
2898 MAX_NAMED_LIST, s+10, US"domain list");
2899
2900 else if (Ustrncmp(s, "hostlist", 8) == 0)
2901 read_named_list(&hostlist_anchor, &hostlist_count,
2902 MAX_NAMED_LIST, s+8, US"host list");
2903
2904 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2905 read_named_list(&addresslist_anchor, &addresslist_count,
2906 MAX_NAMED_LIST, s+11, US"address list");
2907
2908 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2909 read_named_list(&localpartlist_anchor, &localpartlist_count,
2910 MAX_NAMED_LIST, s+13, US"local part list");
2911
2912 else
2913 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2914 NULL, US"main option \"%s\" unknown");
2915 }
2916
2917
2918 /* If local_sender_retain is set, local_from_check must be unset. */
2919
2920 if (local_sender_retain && local_from_check)
2921 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2922 "local_sender_retain are set; this combination is not allowed");
2923
2924 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2925 wanted. */
2926
2927 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2928
2929 /* The max retry interval must not be greater than 24 hours. */
2930
2931 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2932
2933 /* remote_max_parallel must be > 0 */
2934
2935 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2936
2937 /* Save the configured setting of freeze_tell, so we can re-instate it at the
2938 start of a new SMTP message. */
2939
2940 freeze_tell_config = freeze_tell;
2941
2942 /* The primary host name may be required for expansion of spool_directory
2943 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2944 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2945 canonize it. Some people like upper case letters in their host names, so we
2946 don't force the case. */
2947
2948 if (primary_hostname == NULL)
2949 {
2950 uschar *hostname;
2951 struct utsname uts;
2952 if (uname(&uts) < 0)
2953 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2954 hostname = US uts.nodename;
2955
2956 if (Ustrchr(hostname, '.') == NULL)
2957 {
2958 int af = AF_INET;
2959 struct hostent *hostdata;
2960
2961 #if HAVE_IPV6
2962 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
2963 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2964 TRUE, NULL) != OK))
2965 af = AF_INET6;
2966 #else
2967 af = AF_INET;
2968 #endif
2969
2970 for (;;)
2971 {
2972 #if HAVE_IPV6
2973 #if HAVE_GETIPNODEBYNAME
2974 int error_num;
2975 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2976 #else
2977 hostdata = gethostbyname2(CS hostname, af);
2978 #endif
2979 #else
2980 hostdata = gethostbyname(CS hostname);
2981 #endif
2982
2983 if (hostdata != NULL)
2984 {
2985 hostname = US hostdata->h_name;
2986 break;
2987 }
2988
2989 if (af == AF_INET) break;
2990 af = AF_INET;
2991 }
2992 }
2993
2994 primary_hostname = string_copy(hostname);
2995 }
2996
2997 /* Set up default value for smtp_active_hostname */
2998
2999 smtp_active_hostname = primary_hostname;
3000
3001 /* If spool_directory wasn't set in the build-time configuration, it must have
3002 got set above. Of course, writing to the log may not work if log_file_path is
3003 not set, but it will at least get to syslog or somewhere, with any luck. */
3004
3005 if (*spool_directory == 0)
3006 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3007 "proceed");
3008
3009 /* Expand the spool directory name; it may, for example, contain the primary
3010 host name. Same comment about failure. */
3011
3012 s = expand_string(spool_directory);
3013 if (s == NULL)
3014 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3015 "\"%s\": %s", spool_directory, expand_string_message);
3016 spool_directory = s;
3017
3018 /* Expand log_file_path, which must contain "%s" in any component that isn't
3019 the null string or "syslog". It is also allowed to contain one instance of %D.
3020 However, it must NOT contain % followed by anything else. */
3021
3022 if (*log_file_path != 0)
3023 {
3024 uschar *ss, *sss;
3025 int sep = ':'; /* Fixed for log file path */
3026 s = expand_string(log_file_path);
3027 if (s == NULL)
3028 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3029 "\"%s\": %s", log_file_path, expand_string_message);
3030
3031 ss = s;
3032 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3033 {
3034 uschar *t;
3035 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3036 t = Ustrstr(sss, "%s");
3037 if (t == NULL)
3038 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3039 "contain \"%%s\"", sss);
3040 *t = 'X';
3041 t = Ustrchr(sss, '%');
3042 if (t != NULL)
3043 {
3044 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
3045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3046 "unexpected \"%%\" character", s);
3047 }
3048 }
3049
3050 log_file_path = s;
3051 }
3052
3053 /* Interpret syslog_facility into an integer argument for 'ident' param to
3054 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3055 leading "log_". */
3056
3057 if (syslog_facility_str != NULL)
3058 {
3059 int i;
3060 uschar *s = syslog_facility_str;
3061
3062 if ((Ustrlen(syslog_facility_str) >= 4) &&
3063 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3064 s += 4;
3065
3066 for (i = 0; i < syslog_list_size; i++)
3067 {
3068 if (strcmpic(s, syslog_list[i].name) == 0)
3069 {
3070 syslog_facility = syslog_list[i].value;
3071 break;
3072 }
3073 }
3074
3075 if (i >= syslog_list_size)
3076 {
3077 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3078 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3079 }
3080 }
3081
3082 /* Expand pid_file_path */
3083
3084 if (*pid_file_path != 0)
3085 {
3086 s = expand_string(pid_file_path);
3087 if (s == NULL)
3088 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3089 "\"%s\": %s", pid_file_path, expand_string_message);
3090 pid_file_path = s;
3091 }
3092
3093 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3094 message. */
3095
3096 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3097
3098 /* Unpick the SMTP rate limiting options, if set */
3099
3100 if (smtp_ratelimit_mail != NULL)
3101 {
3102 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3103 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3104 }
3105
3106 if (smtp_ratelimit_rcpt != NULL)
3107 {
3108 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3109 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3110 }
3111
3112 /* The qualify domains default to the primary host name */
3113
3114 if (qualify_domain_sender == NULL)
3115 qualify_domain_sender = primary_hostname;
3116 if (qualify_domain_recipient == NULL)
3117 qualify_domain_recipient = qualify_domain_sender;
3118
3119 /* Setting system_filter_user in the configuration sets the gid as well if a
3120 name is given, but a numerical value does not. */
3121
3122 if (system_filter_uid_set && !system_filter_gid_set)
3123 {
3124 struct passwd *pw = getpwuid(system_filter_uid);
3125 if (pw == NULL)
3126 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3127 (long int)system_filter_uid);
3128 system_filter_gid = pw->pw_gid;
3129 system_filter_gid_set = TRUE;
3130 }
3131
3132 /* If the errors_reply_to field is set, check that it is syntactically valid
3133 and ensure it contains a domain. */
3134
3135 if (errors_reply_to != NULL)
3136 {
3137 uschar *errmess;
3138 int start, end, domain;
3139 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3140 &start, &end, &domain, FALSE);
3141
3142 if (recipient == NULL)
3143 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3144 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3145
3146 if (domain == 0)
3147 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3148 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3149 }
3150
3151 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3152 smtp_accept_max must also be set. */
3153
3154 if (smtp_accept_max == 0 &&
3155 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3156 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3157 "smtp_accept_max must be set if smtp_accept_queue or "
3158 "smtp_accept_max_per_host is set");
3159
3160 /* Set up the host number if anything is specified. It is an expanded string
3161 so that it can be computed from the host name, for example. We do this last
3162 so as to ensure that everything else is set up before the expansion. */
3163
3164 if (host_number_string != NULL)
3165 {
3166 uschar *end;
3167 uschar *s = expand_string(host_number_string);
3168 long int n = Ustrtol(s, &end, 0);
3169 while (isspace(*end)) end++;
3170 if (*end != 0)
3171 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3172 "localhost_number value is not a number: %s", s);
3173 if (n > LOCALHOST_MAX)
3174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3175 "localhost_number is greater than the maximum allowed value (%d)",
3176 LOCALHOST_MAX);
3177 host_number = n;
3178 }
3179
3180 #ifdef SUPPORT_TLS
3181 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3182
3183 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3184 tls_verify_certificates == NULL)
3185 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3186 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3187 (tls_verify_hosts != NULL)? "" : "try_");
3188
3189 /* If openssl_options is set, validate it */
3190 if (openssl_options != NULL)
3191 {
3192 # ifdef USE_GNUTLS
3193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3194 "openssl_options is set but we're using GnuTLS\n");
3195 # else
3196 long dummy;
3197 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3199 "openssl_options parse error: %s\n", openssl_options);
3200 # endif
3201 }
3202 #endif
3203 }
3204
3205
3206
3207 /*************************************************
3208 * Initialize one driver *
3209 *************************************************/
3210
3211 /* This is called once the driver's generic options, if any, have been read.
3212 We can now find the driver, set up defaults for the private options, and
3213 unset any "set" bits in the private options table (which might have been
3214 set by another incarnation of the same driver).
3215
3216 Arguments:
3217 d pointer to driver instance block, with generic
3218 options filled in
3219 drivers_available vector of available drivers
3220 size_of_info size of each block in drivers_available
3221 class class of driver, for error message
3222
3223 Returns: pointer to the driver info block
3224 */
3225
3226 static driver_info *
3227 init_driver(driver_instance *d, driver_info *drivers_available,
3228 int size_of_info, uschar *class)
3229 {
3230 driver_info *dd;
3231
3232 for (dd = drivers_available; dd->driver_name[0] != 0;
3233 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3234 {
3235 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3236 {
3237 int i;
3238 int len = dd->options_len;
3239 d->info = dd;
3240 d->options_block = store_get(len);
3241 memcpy(d->options_block, dd->options_block, len);
3242 for (i = 0; i < *(dd->options_count); i++)
3243 dd->options[i].type &= ~opt_set;
3244 return dd;
3245 }
3246 }
3247
3248 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3249 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3250
3251 return NULL; /* never obeyed */
3252 }
3253
3254
3255
3256
3257 /*************************************************
3258 * Initialize driver list *
3259 *************************************************/
3260
3261 /* This function is called for routers, transports, and authentication
3262 mechanisms. It reads the data from the current point in the configuration file
3263 up to the end of the section, and sets up a chain of instance blocks according
3264 to the file's contents. The file will already have been opened by a call to
3265 readconf_main, and must be left open for subsequent reading of further data.
3266
3267 Any errors cause a panic crash. Note that the blocks with names driver_info and
3268 driver_instance must map the first portions of all the _info and _instance
3269 blocks for this shared code to work.
3270
3271 Arguments:
3272 class "router", "transport", or "authenticator"
3273 anchor &routers, &transports, &auths
3274 drivers_available available drivers
3275 size_of_info size of each info block
3276 instance_default points to default data for an instance
3277 instance_size size of instance block
3278 driver_optionlist generic option list
3279 driver_optionlist_count count of generic option list
3280
3281 Returns: nothing
3282 */
3283
3284 void
3285 readconf_driver_init(
3286 uschar *class,
3287 driver_instance **anchor,
3288 driver_info *drivers_available,
3289 int size_of_info,
3290 void *instance_default,