Add new errors mail_4xx, data_4xx, lost_connection, tls_required.
[exim.git] / src / src / readconf.c
CommitLineData
e97957bc 1/* $Cambridge: exim/src/src/readconf.c,v 1.22 2006/03/09 15:10:16 ph10 Exp $ */
059ec3d9
PH
2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
d7d7b7b9 7/* Copyright (c) University of Cambridge 1995 - 2006 */
059ec3d9
PH
8/* See the file NOTICE for conditions of use and distribution. */
9
10/* Functions for reading the configuration file, and for displaying
11overall configuration values. Thanks to Brian Candler for the original
12implementation 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
21typedef 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
30typedef 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
40typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43} syslog_fac_item;
44
45
46/* Static variables */
47
48static config_file_item *config_file_stack = NULL; /* For includes */
49
50static uschar *syslog_facility_str = NULL;
51static uschar next_section[24];
52static uschar time_buffer[24];
53
54/* State variables for conditional loading (.ifdef / .else / .endif) */
55
56static int cstate = 0;
57static int cstate_stack_ptr = -1;
58static int cstate_stack[CSTATE_STACK_SIZE];
59
60/* Table of state transitions for handling conditional inclusions. There are
61four 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
70static 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
81values: the length of the name (to save computing it each time), the state to
82set if a macro was found in the line, the state to set if a macro was not found
83in 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
90static 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
99static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101/* Table of syslog facility names and their values */
102
103static 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
119static 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
129must be in alphabetic order because it is searched by binary chop. */
130
131static 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 },
54cdb463
PH
138#ifdef WITH_CONTENT_SCAN
139 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
140#endif
059ec3d9
PH
141 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
142 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
143 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
144 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
145 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
146 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
147 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
148 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
8523533c
TK
149#ifdef WITH_CONTENT_SCAN
150 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
151#endif
059ec3d9
PH
152 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
153 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
154 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
155#ifdef SUPPORT_TLS
156 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
157#endif
158 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
159 { "admin_groups", opt_gidlist, &admin_groups },
160 { "allow_domain_literals", opt_bool, &allow_domain_literals },
161 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
162 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
163 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
164 { "auto_thaw", opt_time, &auto_thaw },
8523533c
TK
165#ifdef WITH_CONTENT_SCAN
166 { "av_scanner", opt_stringptr, &av_scanner },
167#endif
059ec3d9 168 { "bi_command", opt_stringptr, &bi_command },
8523533c
TK
169#ifdef EXPERIMENTAL_BRIGHTMAIL
170 { "bmi_config_file", opt_stringptr, &bmi_config_file },
171#endif
059ec3d9
PH
172 { "bounce_message_file", opt_stringptr, &bounce_message_file },
173 { "bounce_message_text", opt_stringptr, &bounce_message_text },
174 { "bounce_return_body", opt_bool, &bounce_return_body },
175 { "bounce_return_message", opt_bool, &bounce_return_message },
176 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
177 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
178 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
179 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
180 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
181 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
182 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
183 { "check_log_inodes", opt_int, &check_log_inodes },
184 { "check_log_space", opt_Kint, &check_log_space },
a0d6ba8a 185 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
059ec3d9
PH
186 { "check_spool_inodes", opt_int, &check_spool_inodes },
187 { "check_spool_space", opt_Kint, &check_spool_space },
188 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
189 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
4aee0225
PH
190 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
191 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
059ec3d9
PH
192 { "delay_warning", opt_timelist, &delay_warning },
193 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
194 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
195 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
196 { "delivery_date_remove", opt_bool, &delivery_date_remove },
7e66e54d 197 { "disable_ipv6", opt_bool, &disable_ipv6 },
059ec3d9
PH
198 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
199 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
e5a9dba6
PH
200 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
201 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
059ec3d9
PH
202 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
203 { "dns_retrans", opt_time, &dns_retrans },
204 { "dns_retry", opt_int, &dns_retry },
205 /* This option is now a no-op, retained for compability */
206 { "drop_cr", opt_bool, &drop_cr },
207/*********************************************************/
208 { "envelope_to_remove", opt_bool, &envelope_to_remove },
209 { "errors_copy", opt_stringptr, &errors_copy },
210 { "errors_reply_to", opt_stringptr, &errors_reply_to },
211 { "exim_group", opt_gid, &exim_gid },
212 { "exim_path", opt_stringptr, &exim_path },
213 { "exim_user", opt_uid, &exim_uid },
214 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
215 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
216 { "finduser_retries", opt_int, &finduser_retries },
217 { "freeze_tell", opt_stringptr, &freeze_tell },
218 { "gecos_name", opt_stringptr, &gecos_name },
219 { "gecos_pattern", opt_stringptr, &gecos_pattern },
220 { "header_line_maxsize", opt_int, &header_line_maxsize },
221 { "header_maxsize", opt_int, &header_maxsize },
222 { "headers_charset", opt_stringptr, &headers_charset },
223 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
224 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
225 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
226 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
227 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
228 { "hold_domains", opt_stringptr, &hold_domains },
229 { "host_lookup", opt_stringptr, &host_lookup },
230 { "host_lookup_order", opt_stringptr, &host_lookup_order },
231 { "host_reject_connection", opt_stringptr, &host_reject_connection },
232 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
233 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
234#ifdef LOOKUP_IBASE
235 { "ibase_servers", opt_stringptr, &ibase_servers },
236#endif
237 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
238 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
239 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
240 { "keep_malformed", opt_time, &keep_malformed },
241#ifdef LOOKUP_LDAP
242 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
243 { "ldap_version", opt_int, &eldap_version },
244#endif
245 { "local_from_check", opt_bool, &local_from_check },
246 { "local_from_prefix", opt_stringptr, &local_from_prefix },
247 { "local_from_suffix", opt_stringptr, &local_from_suffix },
248 { "local_interfaces", opt_stringptr, &local_interfaces },
249 { "local_scan_timeout", opt_time, &local_scan_timeout },
250 { "local_sender_retain", opt_bool, &local_sender_retain },
251 { "localhost_number", opt_stringptr, &host_number_string },
252 { "log_file_path", opt_stringptr, &log_file_path },
253 { "log_selector", opt_stringptr, &log_selector_string },
254 { "log_timezone", opt_bool, &log_timezone },
255 { "lookup_open_max", opt_int, &lookup_open_max },
256 { "max_username_length", opt_int, &max_username_length },
257 { "message_body_visible", opt_mkint, &message_body_visible },
258 { "message_id_header_domain", opt_stringptr, &message_id_domain },
259 { "message_id_header_text", opt_stringptr, &message_id_text },
260 { "message_logs", opt_bool, &message_logs },
261 { "message_size_limit", opt_stringptr, &message_size_limit },
262#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
263 { "move_frozen_messages", opt_bool, &move_frozen_messages },
264#endif
265 { "mua_wrapper", opt_bool, &mua_wrapper },
266#ifdef LOOKUP_MYSQL
267 { "mysql_servers", opt_stringptr, &mysql_servers },
268#endif
269 { "never_users", opt_uidlist, &never_users },
270#ifdef LOOKUP_ORACLE
271 { "oracle_servers", opt_stringptr, &oracle_servers },
272#endif
273 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
274#ifdef EXIM_PERL
275 { "perl_at_start", opt_bool, &opt_perl_at_start },
276 { "perl_startup", opt_stringptr, &opt_perl_startup },
277#endif
278#ifdef LOOKUP_PGSQL
279 { "pgsql_servers", opt_stringptr, &pgsql_servers },
280#endif
281 { "pid_file_path", opt_stringptr, &pid_file_path },
282 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
283 { "preserve_message_logs", opt_bool, &preserve_message_logs },
284 { "primary_hostname", opt_stringptr, &primary_hostname },
285 { "print_topbitchars", opt_bool, &print_topbitchars },
286 { "process_log_path", opt_stringptr, &process_log_path },
287 { "prod_requires_admin", opt_bool, &prod_requires_admin },
288 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
289 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
290 { "queue_domains", opt_stringptr, &queue_domains },
291 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
292 { "queue_only", opt_bool, &queue_only },
293 { "queue_only_file", opt_stringptr, &queue_only_file },
294 { "queue_only_load", opt_fixed, &queue_only_load },
295 { "queue_only_override", opt_bool, &queue_only_override },
296 { "queue_run_in_order", opt_bool, &queue_run_in_order },
297 { "queue_run_max", opt_int, &queue_run_max },
298 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
299 { "receive_timeout", opt_time, &receive_timeout },
300 { "received_header_text", opt_stringptr, &received_header_text },
301 { "received_headers_max", opt_int, &received_headers_max },
302 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
303 { "recipients_max", opt_int, &recipients_max },
304 { "recipients_max_reject", opt_bool, &recipients_max_reject },
305 { "remote_max_parallel", opt_int, &remote_max_parallel },
306 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
307 { "retry_data_expire", opt_time, &retry_data_expire },
308 { "retry_interval_max", opt_time, &retry_interval_max },
309 { "return_path_remove", opt_bool, &return_path_remove },
310 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
311 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
312 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
313 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
314 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
315 { "smtp_accept_max", opt_int, &smtp_accept_max },
316 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
317 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
318 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
319 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
320 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
321 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
322 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
323 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
324 { "smtp_banner", opt_stringptr, &smtp_banner },
325 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
326 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
327 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
328 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
329 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
330 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
331 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
332 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
333 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
334 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
335 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
336 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
337 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
338 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
8523533c
TK
339#ifdef WITH_CONTENT_SCAN
340 { "spamd_address", opt_stringptr, &spamd_address },
341#endif
059ec3d9
PH
342 { "split_spool_directory", opt_bool, &split_spool_directory },
343 { "spool_directory", opt_stringptr, &spool_directory },
31480e42
PH
344#ifdef LOOKUP_SQLITE
345 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
346#endif
8523533c
TK
347#ifdef EXPERIMENTAL_SRS
348 { "srs_config", opt_stringptr, &srs_config },
384152a6
TK
349 { "srs_hashlength", opt_int, &srs_hashlength },
350 { "srs_hashmin", opt_int, &srs_hashmin },
351 { "srs_maxage", opt_int, &srs_maxage },
352 { "srs_secrets", opt_stringptr, &srs_secrets },
353 { "srs_usehash", opt_bool, &srs_usehash },
354 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
8523533c 355#endif
059ec3d9
PH
356 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
357 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
358 { "syslog_duplication", opt_bool, &syslog_duplication },
359 { "syslog_facility", opt_stringptr, &syslog_facility_str },
360 { "syslog_processname", opt_stringptr, &syslog_processname },
361 { "syslog_timestamp", opt_bool, &syslog_timestamp },
362 { "system_filter", opt_stringptr, &system_filter },
363 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
364 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
365 { "system_filter_group", opt_gid, &system_filter_gid },
366 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
367 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
368 { "system_filter_user", opt_uid, &system_filter_uid },
369 { "tcp_nodelay", opt_bool, &tcp_nodelay },
370 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
371 { "timezone", opt_stringptr, &timezone_string },
372#ifdef SUPPORT_TLS
373 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
374 { "tls_certificate", opt_stringptr, &tls_certificate },
375 { "tls_crl", opt_stringptr, &tls_crl },
376 { "tls_dhparam", opt_stringptr, &tls_dhparam },
377 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
378 { "tls_privatekey", opt_stringptr, &tls_privatekey },
379 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
380 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
381 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
382 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
383 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
384#endif
385 { "trusted_groups", opt_gidlist, &trusted_groups },
386 { "trusted_users", opt_uidlist, &trusted_users },
387 { "unknown_login", opt_stringptr, &unknown_login },
388 { "unknown_username", opt_stringptr, &unknown_username },
389 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
390 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
391 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
392 { "warn_message_file", opt_stringptr, &warn_message_file },
393 { "write_rejectlog", opt_bool, &write_rejectlog }
394};
395
396static int optionlist_config_size =
397 sizeof(optionlist_config)/sizeof(optionlist);
398
399
400
401/*************************************************
402* Find the name of an option *
403*************************************************/
404
405/* This function is to aid debugging. Various functions take arguments that are
406pointer variables in the options table or in option tables for various drivers.
407For debugging output, it is useful to be able to find the name of the option
408which is currently being processed. This function finds it, if it exists, by
409searching the table(s).
410
411Arguments: a value that is presumed to be in the table above
412Returns: the option name, or an empty string
413*/
414
415uschar *
416readconf_find_option(void *p)
417{
418int i;
419router_instance *r;
420transport_instance *t;
421
422for (i = 0; i < optionlist_config_size; i++)
423 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
424
425for (r = routers; r != NULL; r = r->next)
426 {
427 router_info *ri = r->info;
428 for (i = 0; i < ri->options_count[0]; i++)
429 {
430 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
431 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
432 return US ri->options[i].name;
433 }
434 }
435
436for (t = transports; t != NULL; t = t->next)
437 {
438 transport_info *ti = t->info;
439 for (i = 0; i < ti->options_count[0]; i++)
440 {
441 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
442 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
443 return US ti->options[i].name;
444 }
445 }
446
447return US"";
448}
449
450
451
452
cf00dad6
PH
453/*************************************************
454* Deal with an assignment to a macro *
455*************************************************/
456
457/* This function is called when a line that starts with an upper case letter is
458encountered. The argument "line" should contain a complete logical line, and
459start with the first letter of the macro name. The macro name and the
460replacement text are extracted and stored. Redefinition of existing,
461non-command line, macros is permitted using '==' instead of '='.
462
463Arguments:
464 s points to the start of the logical line
465
466Returns: nothing
467*/
468
469static void
470read_macro_assignment(uschar *s)
471{
472uschar name[64];
473int namelen = 0;
474BOOL redef = FALSE;
475macro_item *m;
476macro_item *mlast = NULL;
477
478while (isalnum(*s) || *s == '_')
479 {
480 if (namelen >= sizeof(name) - 1)
481 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
482 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
483 name[namelen++] = *s++;
484 }
485name[namelen] = 0;
486
487while (isspace(*s)) s++;
488if (*s++ != '=')
489 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
490
491if (*s == '=')
492 {
493 redef = TRUE;
494 s++;
495 }
496while (isspace(*s)) s++;
497
498/* If an existing macro of the same name was defined on the command line, we
499just skip this definition. It's an error to attempt to redefine a macro without
500redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
501It is also an error to define a macro whose name begins with the name of a
502previously defined macro. Note: it is documented that the other way round
503works. */
504
505for (m = macros; m != NULL; m = m->next)
506 {
507 int len = Ustrlen(m->name);
508
509 if (Ustrcmp(m->name, name) == 0)
510 {
511 if (!m->command_line && !redef)
512 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
513 "defined (use \"==\" if you want to redefine it", name);
514 break;
515 }
516
517 if (len < namelen && Ustrstr(name, m->name) != NULL)
518 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
519 "a macro because previously defined macro \"%s\" is a substring",
520 name, m->name);
521
522 /* We cannot have this test, because it is documented that a substring
523 macro is permitted (there is even an example).
524 *
525 * if (len > namelen && Ustrstr(m->name, name) != NULL)
526 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
527 * "a macro because it is a substring of previously defined macro \"%s\"",
528 * name, m->name);
529 */
530
531 mlast = m;
532 }
533
534/* Check for an overriding command-line definition. */
535
536if (m != NULL && m->command_line) return;
537
538/* Redefinition must refer to an existing macro. */
539
540if (redef)
541 {
542 if (m == NULL)
543 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
544 "\"%s\"", name);
545 }
546
547/* We have a new definition. The macro_item structure includes a final vector
548called "name" which is one byte long. Thus, adding "namelen" gives us enough
549room to store the "name" string. */
550
551else
552 {
553 m = store_get(sizeof(macro_item) + namelen);
554 if (macros == NULL) macros = m; else mlast->next = m;
555 Ustrncpy(m->name, name, namelen);
556 m->name[namelen] = 0;
557 m->next = NULL;
558 m->command_line = FALSE;
559 }
560
561/* Set the value of the new or redefined macro */
562
563m->replacement = string_copy(s);
564}
565
566
567
568
059ec3d9
PH
569
570/*************************************************
571* Read configuration line *
572*************************************************/
573
574/* A logical line of text is read from the configuration file into the big
575buffer, taking account of macros, .includes, and continuations. The size of
576big_buffer is increased if necessary. The count of configuration lines is
577maintained. Physical input lines starting with # (ignoring leading white space,
578and after macro replacement) and empty logical lines are always ignored.
579Leading and trailing spaces are removed.
580
581If we hit a line of the form "begin xxxx", the xxxx is placed in the
582next_section vector, and the function returns NULL, indicating the end of a
583configuration section. On end-of-file, NULL is returned with next_section
584empty.
585
586Arguments: none
587
588Returns: a pointer to the first non-blank in the line,
589 or NULL if eof or end of section is reached
590*/
591
592static uschar *
593get_config_line(void)
594{
595int startoffset = 0; /* To first non-blank char in logical line */
596int len = 0; /* Of logical line so far */
597int newlen;
598uschar *s, *ss;
599macro_item *m;
600BOOL macro_found;
601
602/* Loop for handling continuation lines, skipping comments, and dealing with
603.include files. */
604
605for (;;)
606 {
607 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
608 {
609 if (config_file_stack != NULL) /* EOF inside .include */
610 {
f1e894f3 611 (void)fclose(config_file);
059ec3d9
PH
612 config_file = config_file_stack->file;
613 config_filename = config_file_stack->filename;
614 config_lineno = config_file_stack->lineno;
615 config_file_stack = config_file_stack->next;
616 continue;
617 }
618
619 /* EOF at top level */
620
621 if (cstate_stack_ptr >= 0)
622 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
623 "Unexpected end of configuration file: .endif missing");
624
625 if (len != 0) break; /* EOF after continuation */
626 next_section[0] = 0; /* EOF at start of logical line */
627 return NULL;
628 }
629
630 config_lineno++;
631 newlen = len + Ustrlen(big_buffer + len);
632
633 /* Handle pathologically long physical lines - yes, it did happen - by
634 extending big_buffer at this point. The code also copes with very long
635 logical lines. */
636
637 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
638 {
639 uschar *newbuffer;
640 big_buffer_size += BIG_BUFFER_SIZE;
641 newbuffer = store_malloc(big_buffer_size);
642
643 /* This use of strcpy is OK because we know that the string in the old
644 buffer is shorter than the new buffer. */
645
646 Ustrcpy(newbuffer, big_buffer);
647 store_free(big_buffer);
648 big_buffer = newbuffer;
649 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
650 break;
651 newlen += Ustrlen(big_buffer + newlen);
652 }
653
654 /* Find the true start of the physical line - leading spaces are always
655 ignored. */
656
657 ss = big_buffer + len;
658 while (isspace(*ss)) ss++;
659
660 /* Process the physical line for macros. If this is the start of the logical
661 line, skip over initial text at the start of the line if it starts with an
662 upper case character followed by a sequence of name characters and an equals
663 sign, because that is the definition of a new macro, and we don't do
664 replacement therein. */
665
666 s = ss;
667 if (len == 0 && isupper(*s))
668 {
669 while (isalnum(*s) || *s == '_') s++;
670 while (isspace(*s)) s++;
671 if (*s != '=') s = ss; /* Not a macro definition */
672 }
673
674 /* For each defined macro, scan the line (from after XXX= if present),
675 replacing all occurrences of the macro. */
676
677 macro_found = FALSE;
678 for (m = macros; m != NULL; m = m->next)
679 {
680 uschar *p, *pp;
681 uschar *t = s;
682
683 while ((p = Ustrstr(t, m->name)) != NULL)
684 {
685 int moveby;
686 int namelen = Ustrlen(m->name);
687 int replen = Ustrlen(m->replacement);
688
689 /* Expand the buffer if necessary */
690
691 while (newlen - namelen + replen + 1 > big_buffer_size)
692 {
693 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
694 uschar *newbuffer = store_malloc(newsize);
695 memcpy(newbuffer, big_buffer, newlen + 1);
696 p = newbuffer + (p - big_buffer);
697 s = newbuffer + (s - big_buffer);
698 ss = newbuffer + (ss - big_buffer);
699 t = newbuffer + (t - big_buffer);
700 big_buffer_size = newsize;
701 store_free(big_buffer);
702 big_buffer = newbuffer;
703 }
704
705 /* Shuffle the remaining characters up or down in the buffer before
706 copying in the replacement text. Don't rescan the replacement for this
707 same macro. */
708
709 pp = p + namelen;
710 moveby = replen - namelen;
711 if (moveby != 0)
712 {
713 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
714 newlen += moveby;
715 }
716 Ustrncpy(p, m->replacement, replen);
717 t = p + replen;
718 macro_found = TRUE;
719 }
720 }
721
722 /* An empty macro replacement at the start of a line could mean that ss no
723 longer points to the first non-blank character. */
724
725 while (isspace(*ss)) ss++;
726
727 /* Check for comment lines - these are physical lines. */
728
729 if (*ss == '#') continue;
730
731 /* Handle conditionals, which are also applied to physical lines. Conditions
732 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
733 expansion occured on the rest of the line. A preliminary test for the leading
734 '.' saves effort on most lines. */
735
736 if (*ss == '.')
737 {
738 int i;
739
740 /* Search the list of conditional directives */
741
742 for (i = 0; i < cond_list_size; i++)
743 {
744 int n;
745 cond_item *c = cond_list+i;
746 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
747
748 /* The following character must be white space or end of string */
749
750 n = ss[1 + c->namelen];
751 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
752
753 /* .ifdef and .ifndef push the current state onto the stack, then set
754 a new one from the table. Stack overflow is an error */
755
756 if (c->pushpop > 0)
757 {
758 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
759 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
760 ".%s nested too deeply", c->name);
761 cstate_stack[++cstate_stack_ptr] = cstate;
762 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
763 }
764
765 /* For any of the others, stack underflow is an error. The next state
766 comes either from the stack (.endif) or from the table. */
767
768 else
769 {
770 if (cstate_stack_ptr < 0)
771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
772 ".%s without matching .ifdef", c->name);
773 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
774 next_cstate[cstate][macro_found? c->action1 : c->action2];
775 }
776
777 /* Having dealt with a directive, break the loop */
778
779 break;
780 }
781
782 /* If we have handled a conditional directive, continue with the next
783 physical line. Otherwise, fall through. */
784
785 if (i < cond_list_size) continue;
786 }
787
788 /* If the conditional state is not 0 (actively using these lines), ignore
789 this input line. */
790
791 if (cstate != 0) continue; /* Conditional skip */
792
793 /* Handle .include lines - these are also physical lines. */
794
795 if (Ustrncmp(ss, ".include", 8) == 0 &&
796 (isspace(ss[8]) ||
797 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
798 {
799 uschar *t;
800 int include_if_exists = isspace(ss[8])? 0 : 10;
801 config_file_item *save;
802 struct stat statbuf;
803
804 ss += 9 + include_if_exists;
805 while (isspace(*ss)) ss++;
806 t = ss + Ustrlen(ss);
807 while (t > ss && isspace(t[-1])) t--;
808 if (*ss == '\"' && t[-1] == '\"')
809 {
810 ss++;
811 t--;
812 }
813 *t = 0;
814
145396a6
PH
815 if (*ss != '/')
816 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
817 "absolute path \"%s\"", ss);
818
059ec3d9
PH
819 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
820
821 save = store_get(sizeof(config_file_item));
822 save->next = config_file_stack;
823 config_file_stack = save;
824 save->file = config_file;
825 save->filename = config_filename;
826 save->lineno = config_lineno;
827
828 config_file = Ufopen(ss, "rb");
829 if (config_file == NULL)
830 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
831 "configuration file %s", ss);
832 config_filename = string_copy(ss);
833 config_lineno = 0;
834 continue;
835 }
836
837 /* If this is the start of the logical line, remember where the non-blank
838 data starts. Otherwise shuffle down continuation lines to remove leading
839 white space. */
840
841 if (len == 0)
842 startoffset = ss - big_buffer;
843 else
844 {
845 s = big_buffer + len;
846 if (ss > s)
847 {
848 memmove(s, ss, (newlen - len) - (ss - s) + 1);
849 newlen -= ss - s;
850 }
851 }
852
853 /* Accept the new addition to the line. Remove trailing white space. */
854
855 len = newlen;
856 while (len > 0 && isspace(big_buffer[len-1])) len--;
857 big_buffer[len] = 0;
858
859 /* We are done if the line does not end in backslash and contains some data.
860 Empty logical lines are ignored. For continuations, remove the backslash and
861 go round the loop to read the continuation line. */
862
863 if (len > 0)
864 {
865 if (big_buffer[len-1] != '\\') break; /* End of logical line */
866 big_buffer[--len] = 0; /* Remove backslash */
867 }
868 } /* Loop for reading multiple physical lines */
869
870/* We now have a logical line. Test for the end of a configuration section (or,
871more accurately, for the start of the next section). Place the name of the next
872section in next_section, and return NULL. If the name given is longer than
873next_section, truncate it. It will be unrecognized later, because all the known
874section names do fit. Leave space for pluralizing. */
875
876s = big_buffer + startoffset; /* First non-space character */
877if (strncmpic(s, US"begin ", 6) == 0)
878 {
879 s += 6;
880 while (isspace(*s)) s++;
881 if (big_buffer + len - s > sizeof(next_section) - 2)
882 s[sizeof(next_section) - 2] = 0;
883 Ustrcpy(next_section, s);
884 return NULL;
885 }
886
887/* Return the first non-blank character. */
888
889return s;
890}
891
892
893
894/*************************************************
895* Read a name *
896*************************************************/
897
898/* The yield is the pointer to the next uschar. Names longer than the
899output space are silently truncated. This function is also used from acl.c when
900parsing ACLs.
901
902Arguments:
903 name where to put the name
904 len length of name
905 s input pointer
906
907Returns: new input pointer
908*/
909
910uschar *
911readconf_readname(uschar *name, int len, uschar *s)
912{
913int p = 0;
914while (isspace(*s)) s++;
915if (isalpha(*s))
916 {
917 while (isalnum(*s) || *s == '_')
918 {
919 if (p < len-1) name[p++] = *s;
920 s++;
921 }
922 }
923name[p] = 0;
924while (isspace(*s)) s++;
925return s;
926}
927
928
929
930
931/*************************************************
932* Read a time value *
933*************************************************/
934
935/* This function is also called from outside, to read argument
936time values. The format of a time value is:
937
938 [<n>w][<n>d][<n>h][<n>m][<n>s]
939
940as long as at least one is present. If a format error is encountered,
941return a negative value. The value must be terminated by the given
942terminator.
943
944Arguments:
945 s input pointer
946 terminator required terminating character
947 return_msec if TRUE, allow fractional seconds and return milliseconds
948
949Returns: the time value, or -1 on syntax error
950 value is seconds if return_msec is FALSE
951 value is milliseconds if return_msec is TRUE
952*/
953
954int
955readconf_readtime(uschar *s, int terminator, BOOL return_msec)
956{
957int yield = 0;
958for (;;)
959 {
960 int value, count;
961 double fraction;
962
963 if (!isdigit(*s)) return -1;
964 (void)sscanf(CS s, "%d%n", &value, &count);
965 s += count;
966
967 switch (*s)
968 {
969 case 'w': value *= 7;
970 case 'd': value *= 24;
971 case 'h': value *= 60;
972 case 'm': value *= 60;
973 case 's': s++;
974 break;
975
976 case '.':
977 if (!return_msec) return -1;
978 (void)sscanf(CS s, "%lf%n", &fraction, &count);
979 s += count;
980 if (*s++ != 's') return -1;
981 yield += (int)(fraction * 1000.0);
982 break;
983
984 default: return -1;
985 }
986
987 if (return_msec) value *= 1000;
988 yield += value;
989 if (*s == terminator) return yield;
990 }
991/* Control never reaches here. */
992}
993
994
995
996/*************************************************
997* Read a fixed point value *
998*************************************************/
999
1000/* The value is returned *1000
1001
1002Arguments:
1003 s input pointer
1004 terminator required terminator
1005
1006Returns: the value, or -1 on error
1007*/
1008
1009static int
1010readconf_readfixed(uschar *s, int terminator)
1011{
1012int yield = 0;
1013int value, count;
1014if (!isdigit(*s)) return -1;
1015(void)sscanf(CS s, "%d%n", &value, &count);
1016s += count;
1017yield = value * 1000;
1018if (*s == '.')
1019 {
1020 int m = 100;
1021 while (isdigit((*(++s))))
1022 {
1023 yield += (*s - '0') * m;
1024 m /= 10;
1025 }
1026 }
1027
1028return (*s == terminator)? yield : (-1);
1029}
1030
1031
1032
1033/*************************************************
1034* Find option in list *
1035*************************************************/
1036
1037/* The lists are always in order, so binary chop can be used.
1038
1039Arguments:
1040 name the option name to search for
1041 ol the first entry in the option list
1042 last one more than the offset of the last entry in the option list
1043
1044Returns: pointer to an option entry, or NULL if not found
1045*/
1046
1047static optionlist *
1048find_option(uschar *name, optionlist *ol, int last)
1049{
1050int first = 0;
1051while (last > first)
1052 {
1053 int middle = (first + last)/2;
1054 int c = Ustrcmp(name, ol[middle].name);
1055 if (c == 0) return ol + middle;
1056 else if (c > 0) first = middle + 1;
1057 else last = middle;
1058 }
1059return NULL;
1060}
1061
1062
1063
1064/*************************************************
1065* Find a set flag in option list *
1066*************************************************/
1067
1068/* Because some versions of Unix make no restrictions on the values of uids and
1069gids (even negative ones), we cannot represent "unset" by a special value.
1070There is therefore a separate boolean variable for each one indicating whether
1071a value is set or not. This function returns a pointer to the boolean, given
1072the original option name. It is a major disaster if the flag cannot be found.
1073
1074Arguments:
1075 name the name of the uid or gid option
1076 oltop points to the start of the relevant option list
1077 last one more than the offset of the last item in the option list
1078 data_block NULL when reading main options => data values in the option
1079 list are absolute addresses; otherwise they are byte offsets
1080 in data_block (used for driver options)
1081
1082Returns: a pointer to the boolean flag.
1083*/
1084
1085static BOOL *
1086get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1087{
1088optionlist *ol;
1089uschar name2[64];
1090sprintf(CS name2, "*set_%.50s", name);
1091ol = find_option(name2, oltop, last);
1092if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1093 "Exim internal error: missing set flag for %s", name);
1094return (data_block == NULL)? (BOOL *)(ol->value) :
1095 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1096}
1097
1098
1099
1100
1101/*************************************************
1102* Output extra characters message and die *
1103*************************************************/
1104
1105/* Called when an option line has junk on the end. Sometimes this is because
1106the sysadmin thinks comments are permitted.
1107
1108Arguments:
1109 s points to the extra characters
1110 t1..t3 strings to insert in the log message
1111
1112Returns: doesn't return; dies
1113*/
1114
1115static void
1116extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1117{
1118uschar *comment = US"";
1119if (*s == '#') comment = US" (# is comment only at line start)";
1120log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1121 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1122}
1123
1124
1125
1126/*************************************************
1127* Read rewrite information *
1128*************************************************/
1129
1130/* Each line of rewrite information contains:
1131
1132. A complete address in the form user@domain, possibly with
1133 leading * for each part; or alternatively, a regex.
1134
1135. A replacement string (which will be expanded).
1136
1137. An optional sequence of one-letter flags, indicating which
1138 headers etc. to apply this rule to.
1139
1140All this is decoded and placed into a control block. The OR of the flags is
1141maintained in a common word.
1142
1143Arguments:
1144 p points to the string that makes up the rule
1145 existflags points to the overall flag word
1146 isglobal TRUE if reading global rewrite rules
1147
1148Returns: the control block for the parsed rule.
1149*/
1150
1151static rewrite_rule *
1152readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1153{
1154rewrite_rule *next = store_get(sizeof(rewrite_rule));
1155
1156next->next = NULL;
1157next->key = string_dequote(&p);
1158
1159while (isspace(*p)) p++;
1160if (*p == 0)
1161 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1162 "missing rewrite replacement string");
1163
1164next->flags = 0;
1165next->replacement = string_dequote(&p);
1166
1167while (*p != 0) switch (*p++)
1168 {
1169 case ' ': case '\t': break;
1170
1171 case 'q': next->flags |= rewrite_quit; break;
1172 case 'w': next->flags |= rewrite_whole; break;
1173
1174 case 'h': next->flags |= rewrite_all_headers; break;
1175 case 's': next->flags |= rewrite_sender; break;
1176 case 'f': next->flags |= rewrite_from; break;
1177 case 't': next->flags |= rewrite_to; break;
1178 case 'c': next->flags |= rewrite_cc; break;
1179 case 'b': next->flags |= rewrite_bcc; break;
1180 case 'r': next->flags |= rewrite_replyto; break;
1181
1182 case 'E': next->flags |= rewrite_all_envelope; break;
1183 case 'F': next->flags |= rewrite_envfrom; break;
1184 case 'T': next->flags |= rewrite_envto; break;
1185
1186 case 'Q': next->flags |= rewrite_qualify; break;
1187 case 'R': next->flags |= rewrite_repeat; break;
1188
1189 case 'S':
1190 next->flags |= rewrite_smtp;
1191 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1192 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1193 "rewrite rule has the S flag but is not a regular expression");
1194 break;
1195
1196 default:
1197 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1198 "unknown rewrite flag character '%c' "
1199 "(could be missing quotes round replacement item)", p[-1]);
1200 break;
1201 }
1202
1203/* If no action flags are set, set all the "normal" rewrites. */
1204
1205if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1206 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1207
1208/* Remember which exist, for optimization, and return the rule */
1209
1210*existflags |= next->flags;
1211return next;
1212}
1213
1214
1215
1216
1217/*************************************************
1218* Read global rewrite information *
1219*************************************************/
1220
1221/* Each line is a single rewrite rule; it is parsed into a control block
1222by readconf_one_rewrite(), and its flags are ORed into the global flag
1223word rewrite_existflags. */
1224
1225void
1226readconf_rewrites(void)
1227{
1228rewrite_rule **chain = &global_rewrite_rules;
1229uschar *p;
1230
1231while ((p = get_config_line()) != NULL)
1232 {
1233 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1234 *chain = next;
1235 chain = &(next->next);
1236 }
1237}
1238
1239
1240
1241/*************************************************
1242* Read a string *
1243*************************************************/
1244
1245/* Strings are read into the normal store pool. As long we aren't too
1246near the end of the current block, the string will just use what is necessary
1247on the top of the stacking pool, because string_cat() uses the extension
1248mechanism.
1249
1250Argument:
1251 s the rest of the input line
1252 name the option name (for errors)
1253
1254Returns: pointer to the string
1255*/
1256
1257static uschar *
1258read_string(uschar *s, uschar *name)
1259{
1260uschar *yield;
1261uschar *ss;
1262
1263if (*s != '\"') return string_copy(s);
1264
1265ss = s;
1266yield = string_dequote(&s);
1267
1268if (s == ss+1 || s[-1] != '\"')
1269 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1270 "missing quote at end of string value for %s", name);
1271
1272if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1273
1274return yield;
1275}
1276
1277
1278/*************************************************
1279* Handle option line *
1280*************************************************/
1281
1282/* This function is called from several places to process a line containing the
1283setting of an option. The first argument is the line to be decoded; it has been
1284checked not to be empty and not to start with '#'. Trailing newlines and white
1285space have been removed. The second argument is a pointer to the list of
1286variable names that are to be recognized, together with their types and
1287locations, and the third argument gives the number of entries in the list.
1288
1289The fourth argument is a pointer to a data block. If it is NULL, then the data
1290values in the options list are absolute addresses. Otherwise, they are byte
1291offsets in the data block.
1292
1293String option data may continue onto several lines; this function reads further
1294data from config_file if necessary.
1295
1296The yield of this function is normally zero. If a string continues onto
1297multiple lines, then the data value is permitted to be followed by a comma
1298or a semicolon (for use in drivers) and the yield is that character.
1299
1300Arguments:
1301 buffer contains the configuration line to be handled
1302 oltop points to the start of the relevant option list
1303 last one more than the offset of the last item in the option list
1304 data_block NULL when reading main options => data values in the option
1305 list are absolute addresses; otherwise they are byte offsets
1306 in data_block when they have opt_public set; otherwise
1307 they are byte offsets in data_block->options_block.
1308 unknown_txt format string to use in panic message for unknown option;
1309 must contain %s for option name
1310 if given as NULL, don't panic on unknown option
1311
1312Returns: TRUE if an option was read successfully,
1313 FALSE false for an unknown option if unknown_txt == NULL,
1314 otherwise panic and die on an unknown option
1315*/
1316
1317static BOOL
1318readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1319 void *data_block, uschar *unknown_txt)
1320{
1321int ptr = 0;
1322int offset = 0;
1323int n, count, type, value;
1324int issecure = 0;
1325uid_t uid;
1326gid_t gid;
1327BOOL boolvalue = TRUE;
1328BOOL freesptr = TRUE;
1329optionlist *ol, *ol2;
1330struct passwd *pw;
1331void *reset_point;
1332int intbase = 0;
1333uschar *inttype = US"";
1334uschar *sptr;
1335uschar *s = buffer;
1336uschar name[64];
1337uschar name2[64];
1338
1339/* There may be leading spaces; thereafter, we expect an option name starting
1340with a letter. */
1341
1342while (isspace(*s)) s++;
1343if (!isalpha(*s))
1344 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1345
1346/* Read the name of the option, and skip any subsequent white space. If
1347it turns out that what we read was "hide", set the flag indicating that
1348this is a secure option, and loop to read the next word. */
1349
1350for (n = 0; n < 2; n++)
1351 {
1352 while (isalnum(*s) || *s == '_')
1353 {
1354 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1355 s++;
1356 }
1357 name[ptr] = 0;
1358 while (isspace(*s)) s++;
1359 if (Ustrcmp(name, "hide") != 0) break;
1360 issecure = opt_secure;
1361 ptr = 0;
1362 }
1363
1364/* Deal with "no_" or "not_" here for booleans */
1365
1366if (Ustrncmp(name, "no_", 3) == 0)
1367 {
1368 boolvalue = FALSE;
1369 offset = 3;
1370 }
1371
1372if (Ustrncmp(name, "not_", 4) == 0)
1373 {
1374 boolvalue = FALSE;
1375 offset = 4;
1376 }
1377
1378/* Search the list for the given name. A non-existent name, or an option that
1379is set twice, is a disaster. */
1380
1381ol = find_option(name + offset, oltop, last);
1382
1383if (ol == NULL)
1384 {
1385 if (unknown_txt == NULL) return FALSE;
1386 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1387 }
1388
1389if ((ol->type & opt_set) != 0)
1390 {
1391 uschar *mname = name;
1392 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1393 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1394 "\"%s\" option set for the second time", mname);
1395 }
1396
1397ol->type |= opt_set | issecure;
1398type = ol->type & opt_mask;
1399
1400/* Types with data values must be followed by '='; the "no[t]_" prefix
1401applies only to boolean values. */
1402
1403if (type < opt_bool || type > opt_bool_last)
1404 {
1405 if (offset != 0)
1406 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1407 "negation prefix applied to a non-boolean option");
1408 if (*s == 0)
1409 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1410 "unexpected end of line (data missing) after %s", name);
1411 if (*s != '=')
1412 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1413 }
1414
1415/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1416true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1417ultimately expands to one of those values. */
1418
1419else if (*s != 0 && (offset != 0 || *s != '='))
1420 extra_chars_error(s, US"boolean option ", name, US"");
1421
1422/* Skip white space after = */
1423
1424if (*s == '=') while (isspace((*(++s))));
1425
1426/* If there is a data block and the opt_public flag is not set, change
1427the data block pointer to the private options block. */
1428
1429if (data_block != NULL && (ol->type & opt_public) == 0)
1430 data_block = (void *)(((driver_instance *)data_block)->options_block);
1431
1432/* Now get the data according to the type. */
1433
1434switch (type)
1435 {
1436 /* If a string value is not enclosed in quotes, it consists of
1437 the rest of the current line, verbatim. Otherwise, string escapes
1438 are processed.
1439
1440 A transport is specified as a string, which is then looked up in the
1441 list of transports. A search type is specified as one of a number of
1442 known strings.
1443
1444 A set or rewrite rules for a driver is specified as a string, which is
1445 then parsed into a suitable chain of control blocks.
1446
1447 Uids and gids are specified as strings which are then looked up in the
1448 passwd file. Lists of uids and gids are similarly specified as colon-
1449 separated strings. */
1450
1451 case opt_stringptr:
1452 case opt_uid:
1453 case opt_gid:
1454 case opt_expand_uid:
1455 case opt_expand_gid:
1456 case opt_uidlist:
1457 case opt_gidlist:
1458 case opt_rewrite:
1459
1460 reset_point = sptr = read_string(s, name);
1461
1462 /* Having read a string, we now have several different ways of using it,
1463 depending on the data type, so do another switch. If keeping the actual
1464 string is not required (because it is interpreted), freesptr is set TRUE,
1465 and at the end we reset the pool. */
1466
1467 switch (type)
1468 {
1469 /* If this was a string, set the variable to point to the new string,
1470 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1471 rules, we still keep the string (for printing), and parse the rules into a
1472 control block and flags word. */
1473
1474 case opt_stringptr:
1475 case opt_rewrite:
1476 if (data_block == NULL)
1477 *((uschar **)(ol->value)) = sptr;
1478 else
1479 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1480 freesptr = FALSE;
1481 if (type == opt_rewrite)
1482 {
1483 int sep = 0;
1484 int *flagptr;
1485 uschar *p = sptr;
1486 rewrite_rule **chain;
1487 optionlist *ol3;
1488
1489 sprintf(CS name2, "*%.50s_rules", name);
1490 ol2 = find_option(name2, oltop, last);
1491 sprintf(CS name2, "*%.50s_flags", name);
1492 ol3 = find_option(name2, oltop, last);
1493
1494 if (ol2 == NULL || ol3 == NULL)
1495 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1496 "rewrite rules not available for driver");
1497
1498 if (data_block == NULL)
1499 {
1500 chain = (rewrite_rule **)(ol2->value);
1501 flagptr = (int *)(ol3->value);
1502 }
1503 else
1504 {
1505 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1506 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1507 }
1508
1509 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1510 != NULL)
1511 {
1512 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1513 *chain = next;
1514 chain = &(next->next);
1515 }
1516
1517 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1518 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1519 "non-header rewrite - not allowed at transport time -");
1520 }
1521 break;
1522
1523 /* If it was an expanded uid, see if there is any expansion to be
1524 done by checking for the presence of a $ character. If there is, save it
1525 in the corresponding *expand_user option field. Otherwise, fall through
1526 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1527 of data. */
1528
1529 case opt_expand_uid:
1530 sprintf(CS name2, "*expand_%.50s", name);
1531 ol2 = find_option(name2, oltop, last);
1532 if (ol2 != NULL)
1533 {
1534 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1535
1536 if (data_block == NULL)
1537 *((uschar **)(ol2->value)) = ss;
1538 else
1539 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1540
1541 if (ss != NULL)
1542 {
1543 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1544 freesptr = FALSE;
1545 break;
1546 }
1547 }
1548
1549 /* Look up a fixed uid, and also make use of the corresponding gid
1550 if a passwd entry is returned and the gid has not been set. */
1551
1552 case opt_uid:
1553 if (!route_finduser(sptr, &pw, &uid))
1554 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1555 if (data_block == NULL)
1556 *((uid_t *)(ol->value)) = uid;
1557 else
1558 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1559
1560 /* Set the flag indicating a fixed value is set */
1561
1562 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1563
1564 /* Handle matching gid if we have a passwd entry: done by finding the
1565 same name with terminating "user" changed to "group"; if not found,
1566 ignore. Also ignore if the value is already set. */
1567
1568 if (pw == NULL) break;
1569 Ustrcpy(name+Ustrlen(name)-4, "group");
1570 ol2 = find_option(name, oltop, last);
1571 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1572 (ol2->type & opt_mask) == opt_expand_gid))
1573 {
1574 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1575 if (! *set_flag)
1576 {
1577 if (data_block == NULL)
1578 *((gid_t *)(ol2->value)) = pw->pw_gid;
1579 else
1580 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1581 *set_flag = TRUE;
1582 }
1583 }
1584 break;
1585
1586 /* If it was an expanded gid, see if there is any expansion to be
1587 done by checking for the presence of a $ character. If there is, save it
1588 in the corresponding *expand_user option field. Otherwise, fall through
1589 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1590 of data. */
1591
1592 case opt_expand_gid:
1593 sprintf(CS name2, "*expand_%.50s", name);
1594 ol2 = find_option(name2, oltop, last);
1595 if (ol2 != NULL)
1596 {
1597 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1598
1599 if (data_block == NULL)
1600 *((uschar **)(ol2->value)) = ss;
1601 else
1602 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1603
1604 if (ss != NULL)
1605 {
1606 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1607 freesptr = FALSE;
1608 break;
1609 }
1610 }
1611
1612 /* Handle freestanding gid */
1613
1614 case opt_gid:
1615 if (!route_findgroup(sptr, &gid))
1616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1617 if (data_block == NULL)
1618 *((gid_t *)(ol->value)) = gid;
1619 else
1620 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1621 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1622 break;
1623
1624 /* If it was a uid list, look up each individual entry, and build
1625 a vector of uids, with a count in the first element. Put the vector
1626 in malloc store so we can free the string. (We are reading into
1627 permanent store already.) */
1628
1629 case opt_uidlist:
1630 {
1631 int count = 1;
1632 uid_t *list;
1633 int ptr = 0;
0925ede6
PH
1634 uschar *p;
1635 uschar *op = expand_string (sptr);
1636
1637 if (op == NULL)
1638 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1639 name, expand_string_message);
059ec3d9 1640
0925ede6 1641 p = op;
059ec3d9 1642 if (*p != 0) count++;
0925ede6 1643 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1644 list = store_malloc(count*sizeof(uid_t));
1645 list[ptr++] = (uid_t)(count - 1);
1646
1647 if (data_block == NULL)
1648 *((uid_t **)(ol->value)) = list;
1649 else
1650 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1651
0925ede6 1652 p = op;
059ec3d9
PH
1653 while (count-- > 1)
1654 {
1655 int sep = 0;
1656 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1657 if (!route_finduser(big_buffer, NULL, &uid))
1658 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1659 big_buffer);
1660 list[ptr++] = uid;
1661 }
1662 }
1663 break;
1664
1665 /* If it was a gid list, look up each individual entry, and build
1666 a vector of gids, with a count in the first element. Put the vector
1667 in malloc store so we can free the string. (We are reading into permanent
1668 store already.) */
1669
1670 case opt_gidlist:
1671 {
1672 int count = 1;
1673 gid_t *list;
1674 int ptr = 0;
0925ede6
PH
1675 uschar *p;
1676 uschar *op = expand_string (sptr);
1677
1678 if (op == NULL)
1679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1680 name, expand_string_message);
059ec3d9 1681
0925ede6 1682 p = op;
059ec3d9 1683 if (*p != 0) count++;
0925ede6 1684 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1685 list = store_malloc(count*sizeof(gid_t));
1686 list[ptr++] = (gid_t)(count - 1);
1687
1688 if (data_block == NULL)
1689 *((gid_t **)(ol->value)) = list;
1690 else
1691 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1692
0925ede6 1693 p = op;
059ec3d9
PH
1694 while (count-- > 1)
1695 {
1696 int sep = 0;
1697 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1698 if (!route_findgroup(big_buffer, &gid))
1699 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1700 big_buffer);
1701 list[ptr++] = gid;
1702 }
1703 }
1704 break;
1705 }
1706
1707 /* Release store if the value of the string doesn't need to be kept. */
1708
1709 if (freesptr) store_reset(reset_point);
1710 break;
1711
1712 /* Expanded boolean: if no characters follow, or if there are no dollar
1713 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1714 save the string for later expansion in the alternate place. */
1715
1716 case opt_expand_bool:
1717 if (*s != 0 && Ustrchr(s, '$') != 0)
1718 {
1719 sprintf(CS name2, "*expand_%.50s", name);
1720 ol2 = find_option(name2, oltop, last);
1721 if (ol2 != NULL)
1722 {
1723 reset_point = sptr = read_string(s, name);
1724 if (data_block == NULL)
1725 *((uschar **)(ol2->value)) = sptr;
1726 else
1727 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1728 freesptr = FALSE;
1729 break;
1730 }
1731 }
1732 /* Fall through */
1733
1734 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1735 look for yes/not/true/false. Some booleans are stored in a single bit in
1736 a single int. There's a special fudge for verify settings; without a suffix
1737 they set both xx_sender and xx_recipient. The table points to the sender
1738 value; search subsequently for the recipient. There's another special case:
1739 opt_bool_set also notes when a boolean has been set. */
1740
1741 case opt_bool:
1742 case opt_bit:
1743 case opt_bool_verify:
1744 case opt_bool_set:
1745 if (*s != 0)
1746 {
1747 s = readconf_readname(name2, 64, s);
1748 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1749 boolvalue = TRUE;
1750 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1751 boolvalue = FALSE;
1752 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1753 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1754 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1755 US"for boolean option ", name);
1756 }
1757
1758 /* Handle single-bit type. */
1759
1760 if (type == opt_bit)
1761 {
1762 int bit = 1 << ((ol->type >> 16) & 31);
1763 int *ptr = (data_block == NULL)?
1764 (int *)(ol->value) :
1765 (int *)((uschar *)data_block + (long int)ol->value);
1766 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1767 break;
1768 }
1769
1770 /* Handle full BOOL types */
1771
1772 if (data_block == NULL)
1773 *((BOOL *)(ol->value)) = boolvalue;
1774 else
1775 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1776
1777 /* Verify fudge */
1778
1779 if (type == opt_bool_verify)
1780 {
1781 sprintf(CS name2, "%.50s_recipient", name + offset);
1782 ol2 = find_option(name2, oltop, last);
1783 if (ol2 != NULL)
1784 {
1785 if (data_block == NULL)
1786 *((BOOL *)(ol2->value)) = boolvalue;
1787 else
1788 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1789 }
1790 }
1791
1792 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1793
1794 else if (type == opt_bool_set)
1795 {
1796 sprintf(CS name2, "*set_%.50s", name + offset);
1797 ol2 = find_option(name2, oltop, last);
1798 if (ol2 != NULL)
1799 {
1800 if (data_block == NULL)
1801 *((BOOL *)(ol2->value)) = TRUE;
1802 else
1803 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1804 }
1805 }
1806 break;
1807
1808 /* Octal integer */
1809
1810 case opt_octint:
1811 intbase = 8;
1812 inttype = US"octal ";
1813
1814 /* Integer: a simple(ish) case; allow octal and hex formats, and
1815 suffixes K and M. The different types affect output, not input. */
1816
1817 case opt_mkint:
1818 case opt_int:
1819 {
1820 uschar *endptr;
1821 errno = 0;
1822 value = strtol(CS s, CSS &endptr, intbase);
1823
1824 if (endptr == s)
1825 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1826 inttype, name);
1827
1828 if (errno != ERANGE)
1829 {
1830 if (tolower(*endptr) == 'k')
1831 {
1832 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1833 else value *= 1024;
1834 endptr++;
1835 }
1836 else if (tolower(*endptr) == 'm')
1837 {
1838 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1839 errno = ERANGE;
1840 else value *= 1024*1024;
1841 endptr++;
1842 }
1843 }
1844
1845 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1846 "absolute value of integer \"%s\" is too large (overflow)", s);
1847
1848 while (isspace(*endptr)) endptr++;
1849 if (*endptr != 0)
1850 extra_chars_error(endptr, inttype, US"integer value for ", name);
1851 }
1852
1853 if (data_block == NULL)
1854 *((int *)(ol->value)) = value;
1855 else
1856 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1857 break;
1858
1859 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1860 M. */
1861
1862 case opt_Kint:
1863 {
1864 uschar *endptr;
1865 errno = 0;
1866 value = strtol(CS s, CSS &endptr, intbase);
1867
1868 if (endptr == s)
1869 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1870 inttype, name);
1871
1872 if (errno != ERANGE)
1873 {
1874 if (tolower(*endptr) == 'm')
1875 {
1876 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1877 else value *= 1024;
1878 endptr++;
1879 }
1880 else if (tolower(*endptr) == 'k')
1881 {
1882 endptr++;
1883 }
1884 else
1885 {
1886 value = (value + 512)/1024;
1887 }
1888 }
1889
1890 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1891 "absolute value of integer \"%s\" is too large (overflow)", s);
1892
1893 while (isspace(*endptr)) endptr++;
1894 if (*endptr != 0)
1895 extra_chars_error(endptr, inttype, US"integer value for ", name);
1896 }
1897
1898 if (data_block == NULL)
1899 *((int *)(ol->value)) = value;
1900 else
1901 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1902 break;
1903
1904 /* Fixed-point number: held to 3 decimal places. */
1905
1906 case opt_fixed:
1907 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1908 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1909 "fixed-point number expected for %s", name);
1910
1911 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1912 "integer \"%s\" is too large (overflow)", s);
1913
1914 value *= 1000;
1915
1916 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1917 "integer \"%s\" is too large (overflow)", s);
1918
1919 if (s[count] == '.')
1920 {
1921 int d = 100;
1922 while (isdigit(s[++count]))
1923 {
1924 value += (s[count] - '0') * d;
1925 d /= 10;
1926 }
1927 }
1928
1929 while (isspace(s[count])) count++;
1930
1931 if (s[count] != 0)
1932 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1933
1934 if (data_block == NULL)
1935 *((int *)(ol->value)) = value;
1936 else
1937 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1938 break;
1939
1940 /* There's a special routine to read time values. */
1941
1942 case opt_time:
1943 value = readconf_readtime(s, 0, FALSE);
1944 if (value < 0)
1945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1946 name);
1947 if (data_block == NULL)
1948 *((int *)(ol->value)) = value;
1949 else
1950 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1951 break;
1952
1953 /* A time list is a list of colon-separated times, with the first
1954 element holding the size of the list and the second the number of
1955 entries used. */
1956
1957 case opt_timelist:
1958 {
1959 int count = 0;
1960 int *list = (data_block == NULL)?
1961 (int *)(ol->value) :
1962 (int *)((uschar *)data_block + (long int)(ol->value));
1963
1964 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1965 {
1966 int terminator = 0;
1967 uschar *snext = Ustrchr(s, ':');
1968 if (snext != NULL)
1969 {
1970 uschar *ss = snext;
1971 while (ss > s && isspace(ss[-1])) ss--;
1972 terminator = *ss;
1973 }
1974 value = readconf_readtime(s, terminator, FALSE);
1975 if (value < 0)
1976 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1977 name);
1978 if (count > 1 && value <= list[count])
1979 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1980 "time value out of order for %s", name);
1981 list[count+1] = value;
1982 if (snext == NULL) break;
1983 s = snext + 1;
1984 while (isspace(*s)) s++;
1985 }
1986
1987 if (count > list[0] - 2)
1988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1989 name);
1990 if (count > 0 && list[2] == 0) count = 0;
1991 list[1] = count;
1992 }
1993
1994 break;
1995 }
1996
1997return TRUE;
1998}
1999
2000
2001
2002/*************************************************
2003* Print a time value *
2004*************************************************/
2005
2006/*
2007Argument: a time value in seconds
2008Returns: pointer to a fixed buffer containing the time as a string,
2009 in readconf_readtime() format
2010*/
2011
2012uschar *
2013readconf_printtime(int t)
2014{
2015int s, m, h, d, w;
2016uschar *p = time_buffer;
2017
ea49d0e1
PH
2018if (t < 0)
2019 {
2020 *p++ = '-';
2021 t = -t;
2022 }
2023
059ec3d9
PH
2024s = t % 60;
2025t /= 60;
2026m = t % 60;
2027t /= 60;
2028h = t % 24;
2029t /= 24;
2030d = t % 7;
2031w = t/7;
2032
2033if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2034if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2035if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2036if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2037if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2038
2039return time_buffer;
2040}
2041
2042
2043
2044/*************************************************
2045* Print an individual option value *
2046*************************************************/
2047
2048/* This is used by the -bP option, so prints to the standard output.
2049The entire options list is passed in as an argument, because some options come
2050in pairs - typically uid/gid settings, which can either be explicit numerical
2051values, or strings to be expanded later. If the numerical value is unset,
2052search for "*expand_<name>" to see if there is a string equivalent.
2053
2054Arguments:
2055 ol option entry, or NULL for an unknown option
2056 name option name
2057 options_block NULL for main configuration options; otherwise points to
2058 a driver block; if the option doesn't have opt_public
2059 set, then options_block->options_block is where the item
2060 resides.
2061 oltop points to the option list in which ol exists
2062 last one more than the offset of the last entry in optop
2063
2064Returns: nothing
2065*/
2066
2067static void
2068print_ol(optionlist *ol, uschar *name, void *options_block,
2069 optionlist *oltop, int last)
2070{
2071struct passwd *pw;
2072struct group *gr;
2073optionlist *ol2;
2074void *value;
2075uid_t *uidlist;
2076gid_t *gidlist;
2077uschar *s;
2078uschar name2[64];
2079
2080if (ol == NULL)
2081 {
2082 printf("%s is not a known option\n", name);
2083 return;
2084 }
2085
2086/* Non-admin callers cannot see options that have been flagged secure by the
2087"hide" prefix. */
2088
2089if (!admin_user && (ol->type & opt_secure) != 0)
2090 {
2091 printf("%s = <value not displayable>\n", name);
2092 return;
2093 }
2094
2095/* Else show the value of the option */
2096
2097value = ol->value;
2098if (options_block != NULL)
2099 {
2100 if ((ol->type & opt_public) == 0)
2101 options_block = (void *)(((driver_instance *)options_block)->options_block);
2102 value = (void *)((uschar *)options_block + (long int)value);
2103 }
2104
2105switch(ol->type & opt_mask)
2106 {
2107 case opt_stringptr:
2108 case opt_rewrite: /* Show the text value */
2109 s = *((uschar **)value);
2110 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2111 break;
2112
2113 case opt_int:
2114 printf("%s = %d\n", name, *((int *)value));
2115 break;
2116
2117 case opt_mkint:
2118 {
2119 int x = *((int *)value);
2120 if (x != 0 && (x & 1023) == 0)
2121 {
2122 int c = 'K';
2123 x >>= 10;
2124 if ((x & 1023) == 0)
2125 {
2126 c = 'M';
2127 x >>= 10;
2128 }
2129 printf("%s = %d%c\n", name, x, c);
2130 }
2131 else printf("%s = %d\n", name, x);
2132 }
2133 break;
2134
2135 case opt_Kint:
2136 {
2137 int x = *((int *)value);
2138 if (x == 0) printf("%s = 0\n", name);
2139 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2140 else printf("%s = %dK\n", name, x);
2141 }
2142 break;
2143
2144 case opt_octint:
2145 printf("%s = %#o\n", name, *((int *)value));
2146 break;
2147
2148 /* Can be negative only when "unset", in which case integer */
2149
2150 case opt_fixed:
2151 {
2152 int x = *((int *)value);
2153 int f = x % 1000;
2154 int d = 100;
2155 if (x < 0) printf("%s =\n", name); else
2156 {
2157 printf("%s = %d.", name, x/1000);
2158 do
2159 {
2160 printf("%d", f/d);
2161 f %= d;
2162 d /= 10;
2163 }
2164 while (f != 0);
2165 printf("\n");
2166 }
2167 }
2168 break;
2169
2170 /* If the numerical value is unset, try for the string value */
2171
2172 case opt_expand_uid:
2173 if (! *get_set_flag(name, oltop, last, options_block))
2174 {
2175 sprintf(CS name2, "*expand_%.50s", name);
2176 ol2 = find_option(name2, oltop, last);
2177 if (ol2 != NULL)
2178 {
2179 void *value2 = ol2->value;
2180 if (options_block != NULL)
2181 value2 = (void *)((uschar *)options_block + (long int)value2);
2182 s = *((uschar **)value2);
2183 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2184 break;
2185 }
2186 }
2187
2188 /* Else fall through */
2189
2190 case opt_uid:
2191 if (! *get_set_flag(name, oltop, last, options_block))
2192 printf("%s =\n", name);
2193 else
2194 {
2195 pw = getpwuid(*((uid_t *)value));
2196 if (pw == NULL)
2197 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2198 else printf("%s = %s\n", name, pw->pw_name);
2199 }
2200 break;
2201
2202 /* If the numerical value is unset, try for the string value */
2203
2204 case opt_expand_gid:
2205 if (! *get_set_flag(name, oltop, last, options_block))
2206 {
2207 sprintf(CS name2, "*expand_%.50s", name);
2208 ol2 = find_option(name2, oltop, last);
2209 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2210 {
2211 void *value2 = ol2->value;
2212 if (options_block != NULL)
2213 value2 = (void *)((uschar *)options_block + (long int)value2);
2214 s = *((uschar **)value2);
2215 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2216 break;
2217 }
2218 }
2219
2220 /* Else fall through */
2221
2222 case opt_gid:
2223 if (! *get_set_flag(name, oltop, last, options_block))
2224 printf("%s =\n", name);
2225 else
2226 {
2227 gr = getgrgid(*((int *)value));
2228 if (gr == NULL)
2229 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2230 else printf("%s = %s\n", name, gr->gr_name);
2231 }
2232 break;
2233
2234 case opt_uidlist:
2235 uidlist = *((uid_t **)value);
2236 printf("%s =", name);
2237 if (uidlist != NULL)
2238 {
2239 int i;
2240 uschar sep = ' ';
2241 for (i = 1; i <= (int)(uidlist[0]); i++)
2242 {
2243 uschar *name = NULL;
2244 pw = getpwuid(uidlist[i]);
2245 if (pw != NULL) name = US pw->pw_name;
2246 if (name != NULL) printf("%c%s", sep, name);
2247 else printf("%c%ld", sep, (long int)(uidlist[i]));
2248 sep = ':';
2249 }
2250 }
2251 printf("\n");
2252 break;
2253
2254 case opt_gidlist:
2255 gidlist = *((gid_t **)value);
2256 printf("%s =", name);
2257 if (gidlist != NULL)
2258 {
2259 int i;
2260 uschar sep = ' ';
2261 for (i = 1; i <= (int)(gidlist[0]); i++)
2262 {
2263 uschar *name = NULL;
2264 gr = getgrgid(gidlist[i]);
2265 if (gr != NULL) name = US gr->gr_name;
2266 if (name != NULL) printf("%c%s", sep, name);
2267 else printf("%c%ld", sep, (long int)(gidlist[i]));
2268 sep = ':';
2269 }
2270 }
2271 printf("\n");
2272 break;
2273
2274 case opt_time:
2275 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2276 break;
2277
2278 case opt_timelist:
2279 {
2280 int i;
2281 int *list = (int *)value;
2282 printf("%s = ", name);
2283 for (i = 0; i < list[1]; i++)
2284 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2285 printf("\n");
2286 }
2287 break;
2288
2289 case opt_bit:
2290 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2291 "" : "no_", name);
2292 break;
2293
2294 case opt_expand_bool:
2295 sprintf(CS name2, "*expand_%.50s", name);
2296 ol2 = find_option(name2, oltop, last);
2297 if (ol2 != NULL && ol2->value != NULL)
2298 {
2299 void *value2 = ol2->value;
2300 if (options_block != NULL)
2301 value2 = (void *)((uschar *)options_block + (long int)value2);
2302 s = *((uschar **)value2);
2303 if (s != NULL)
2304 {
2305 printf("%s = %s\n", name, string_printing(s));
2306 break;
2307 }
2308 /* s == NULL => string not set; fall through */
2309 }
2310
2311 /* Fall through */
2312
2313 case opt_bool:
2314 case opt_bool_verify:
2315 case opt_bool_set:
2316 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2317 break;
2318 }
2319}
2320
2321
2322
2323/*************************************************
2324* Print value from main configuration *
2325*************************************************/
2326
2327/* This function, called as a result of encountering the -bP option,
2328causes the value of any main configuration variable to be output if the
2329second argument is NULL. There are some special values:
2330
2331 all print all main configuration options
2332 configure_file print the name of the configuration file
2333 routers print the routers' configurations
2334 transports print the transports' configuration
2335 authenticators print the authenticators' configuration
2336 router_list print a list of router names
2337 transport_list print a list of transport names
2338 authenticator_list print a list of authentication mechanism names
2339 +name print a named list item
2340 local_scan print the local_scan options
2341
2342If the second argument is not NULL, it must be one of "router", "transport", or
2343"authenticator" in which case the first argument identifies the driver whose
2344options are to be printed.
2345
2346Arguments:
2347 name option name if type == NULL; else driver name
2348 type NULL or driver type name, as described above
2349
2350Returns: nothing
2351*/
2352
2353void
2354readconf_print(uschar *name, uschar *type)
2355{
2356BOOL names_only = FALSE;
2357optionlist *ol;
2358optionlist *ol2 = NULL;
2359driver_instance *d = NULL;
2360int size = 0;
2361
2362if (type == NULL)
2363 {
2364 if (*name == '+')
2365 {
2366 int i;
2367 tree_node *t;
2368 BOOL found = FALSE;
2369 static uschar *types[] = { US"address", US"domain", US"host",
2370 US"localpart" };
2371 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2372 &hostlist_anchor, &localpartlist_anchor };
2373
2374 for (i = 0; i < 4; i++)
2375 {
2376 t = tree_search(*(anchors[i]), name+1);
2377 if (t != NULL)
2378 {
2379 found = TRUE;
2380 printf("%slist %s = %s\n", types[i], name+1,
2381 ((namedlist_block *)(t->data.ptr))->string);
2382 }
2383 }
2384
2385 if (!found)
2386 printf("no address, domain, host, or local part list called \"%s\" "
2387 "exists\n", name+1);
2388
2389 return;
2390 }
2391
2392 if (Ustrcmp(name, "configure_file") == 0)
2393 {
2394 printf("%s\n", CS config_main_filename);
2395 return;
2396 }
2397
2398 if (Ustrcmp(name, "all") == 0)
2399 {
2400 for (ol = optionlist_config;
2401 ol < optionlist_config + optionlist_config_size; ol++)
2402 {
2403 if ((ol->type & opt_hidden) == 0)
2404 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2405 }
2406 return;
2407 }
2408
2409 if (Ustrcmp(name, "local_scan") == 0)
2410 {
2411 #ifndef LOCAL_SCAN_HAS_OPTIONS
2412 printf("local_scan() options are not supported\n");
2413 #else
2414 for (ol = local_scan_options;
2415 ol < local_scan_options + local_scan_options_count; ol++)
2416 {
2417 print_ol(ol, US ol->name, NULL, local_scan_options,
2418 local_scan_options_count);
2419 }
2420 #endif
2421 return;
2422 }
2423
2424 if (Ustrcmp(name, "routers") == 0)
2425 {
2426 type = US"router";
2427 name = NULL;
2428 }
2429 else if (Ustrcmp(name, "transports") == 0)
2430 {
2431 type = US"transport";
2432 name = NULL;
2433 }
2434
2435 else if (Ustrcmp(name, "authenticators") == 0)
2436 {
2437 type = US"authenticator";
2438 name = NULL;
2439 }
2440
2441 else if (Ustrcmp(name, "authenticator_list") == 0)
2442 {
2443 type = US"authenticator";
2444 name = NULL;
2445 names_only = TRUE;
2446 }
2447
2448 else if (Ustrcmp(name, "router_list") == 0)
2449 {
2450 type = US"router";
2451 name = NULL;
2452 names_only = TRUE;
2453 }
2454 else if (Ustrcmp(name, "transport_list") == 0)
2455 {
2456 type = US"transport";
2457 name = NULL;
2458 names_only = TRUE;
2459 }
2460 else
2461 {
2462 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2463 name, NULL, optionlist_config, optionlist_config_size);
2464 return;
2465 }
2466 }
2467
2468/* Handle the options for a router or transport. Skip options that are flagged
2469as hidden. Some of these are options with names starting with '*', used for
2470internal alternative representations of other options (which the printing
2471function will sort out). Others are synonyms kept for backward compatibility.
2472*/
2473
2474if (Ustrcmp(type, "router") == 0)
2475 {
2476 d = (driver_instance *)routers;
2477 ol2 = optionlist_routers;
2478 size = optionlist_routers_size;
2479 }
2480else if (Ustrcmp(type, "transport") == 0)
2481 {
2482 d = (driver_instance *)transports;
2483 ol2 = optionlist_transports;
2484 size = optionlist_transports_size;
2485 }
2486else if (Ustrcmp(type, "authenticator") == 0)
2487 {
2488 d = (driver_instance *)auths;
2489 ol2 = optionlist_auths;
2490 size = optionlist_auths_size;
2491 }
2492
2493if (names_only)
2494 {
2495 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2496 return;
2497 }
2498
2499/* Either search for a given driver, or print all of them */
2500
2501for (; d != NULL; d = d->next)
2502 {
2503 if (name == NULL)
2504 printf("\n%s %s:\n", d->name, type);
2505 else if (Ustrcmp(d->name, name) != 0) continue;
2506
2507 for (ol = ol2; ol < ol2 + size; ol++)
2508 {
2509 if ((ol->type & opt_hidden) == 0)
2510 print_ol(ol, US ol->name, d, ol2, size);
2511 }
2512
2513 for (ol = d->info->options;
2514 ol < d->info->options + *(d->info->options_count); ol++)
2515 {
2516 if ((ol->type & opt_hidden) == 0)
2517 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2518 }
2519 if (name != NULL) return;
2520 }
2521if (name != NULL) printf("%s %s not found\n", type, name);
2522}
2523
2524
2525
2526/*************************************************
2527* Read a named list item *
2528*************************************************/
2529
2530/* This function reads a name and a list (i.e. string). The name is used to
2531save the list in a tree, sorted by its name. Each entry also has a number,
2532which can be used for caching tests, but if the string contains any expansion
2533items other than $key, the number is set negative to inhibit caching. This
2534mechanism is used for domain, host, and address lists that are referenced by
2535the "+name" syntax.
2536
2537Arguments:
2538 anchorp points to the tree anchor
2539 numberp points to the current number for this tree
2540 max the maximum number permitted
2541 s the text of the option line, starting immediately after the name
2542 of the list type
2543 tname the name of the list type, for messages
2544
2545Returns: nothing
2546*/
2547
2548static void
2549read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2550 uschar *tname)
2551{
2552BOOL forcecache = FALSE;
2553uschar *ss;
2554tree_node *t;
2555namedlist_block *nb = store_get(sizeof(namedlist_block));
2556
2557if (Ustrncmp(s, "_cache", 6) == 0)
2558 {
2559 forcecache = TRUE;
2560 s += 6;
2561 }
2562
2563if (!isspace(*s))
2564 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2565
2566if (*numberp >= max)
2567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2568 tname, max);
2569
2570while (isspace(*s)) s++;
2571ss = s;
2572while (isalnum(*s) || *s == '_') s++;
2573t = store_get(sizeof(tree_node) + s-ss);
2574Ustrncpy(t->name, ss, s-ss);
2575t->name[s-ss] = 0;
2576while (isspace(*s)) s++;
2577
2578if (!tree_insertnode(anchorp, t))
2579 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2580 "duplicate name \"%s\" for a named %s", t->name, tname);
2581
2582t->data.ptr = nb;
2583nb->number = *numberp;
2584*numberp += 1;
2585
2586if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2587 "missing '=' after \"%s\"", t->name);
2588while (isspace(*s)) s++;
2589nb->string = read_string(s, t->name);
2590nb->cache_data = NULL;
2591
2592/* Check the string for any expansions; if any are found, mark this list
2593uncacheable unless the user has explicited forced caching. */
2594
2595if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2596}
2597
2598
2599
2600
2601/*************************************************
2602* Unpick data for a rate limit *
2603*************************************************/
2604
2605/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2606separate values.
2607
2608Arguments:
2609 s string, in the form t,b,f,l
2610 where t is the threshold (integer)
2611 b is the initial delay (time)
2612 f is the multiplicative factor (fixed point)
2613 k is the maximum time (time)
2614 threshold where to store threshold
2615 base where to store base in milliseconds
2616 factor where to store factor in milliseconds
2617 limit where to store limit
2618
2619Returns: nothing (panics on error)
2620*/
2621
2622static void
2623unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2624 int *limit)
2625{
2626uschar bstring[16], lstring[16];
2627
2628if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2629 factor, lstring) == 4)
2630 {
2631 *base = readconf_readtime(bstring, 0, TRUE);
2632 *limit = readconf_readtime(lstring, 0, TRUE);
2633 if (*base >= 0 && *limit >= 0) return;
2634 }
2635log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2636}
2637
2638
2639
2640
2641/*************************************************
2642* Read main configuration options *
2643*************************************************/
2644
2645/* This function is the first to be called for configuration reading. It
2646opens the configuration file and reads general configuration settings until
2647it reaches the end of the configuration section. The file is then left open so
2648that the remaining configuration data can subsequently be read if needed for
2649this run of Exim.
2650
2651The configuration file must be owned either by root or exim, and be writeable
2652only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2653in the config file, so the test is done on the compiled in values. A slight
2654anomaly, to be carefully documented.
2655
2656The name of the configuration file is taken from a list that is included in the
2657binary of Exim. It can be altered from the command line, but if that is done,
2658root privilege is immediately withdrawn unless the caller is root or exim.
2659The first file on the list that exists is used.
2660
2661For use on multiple systems that share file systems, first look for a
2662configuration file whose name has the current node name on the end. If that is
2663not found, try the generic name. For really contorted configurations, that run
2664multiple Exims with different uid settings, first try adding the effective uid
2665before the node name. These complications are going to waste resources on most
2666systems. Therefore they are available only when requested by compile-time
2667options. */
2668
2669void
2670readconf_main(void)
2671{
2672int sep = 0;
2673struct stat statbuf;
2674uschar *s, *filename;
2675uschar *list = config_main_filelist;
2676
2677/* Loop through the possible file names */
2678
2679while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2680 != NULL)
2681 {
2682 /* Cut out all the fancy processing unless specifically wanted */
2683
2684 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2685 uschar *suffix = filename + Ustrlen(filename);
2686
2687 /* Try for the node-specific file if a node name exists */
2688
2689 #ifdef CONFIGURE_FILE_USE_NODE
2690 struct utsname uts;
2691 if (uname(&uts) >= 0)
2692 {
2693 #ifdef CONFIGURE_FILE_USE_EUID
2694 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2695 config_file = Ufopen(filename, "rb");
2696 if (config_file == NULL)
2697 #endif /* CONFIGURE_FILE_USE_EUID */
2698 {
2699 sprintf(CS suffix, ".%.256s", uts.nodename);
2700 config_file = Ufopen(filename, "rb");
2701 }
2702 }
2703 #endif /* CONFIGURE_FILE_USE_NODE */
2704
2705 /* Otherwise, try the generic name, possibly with the euid added */
2706
2707 #ifdef CONFIGURE_FILE_USE_EUID
2708 if (config_file == NULL)
2709 {
2710 sprintf(CS suffix, ".%ld", (long int)original_euid);
2711 config_file = Ufopen(filename, "rb");
2712 }
2713 #endif /* CONFIGURE_FILE_USE_EUID */
2714
2715 /* Finally, try the unadorned name */
2716
2717 if (config_file == NULL)
2718 {
2719 *suffix = 0;
2720 config_file = Ufopen(filename, "rb");
2721 }
2722 #else /* if neither defined */
2723
2724 /* This is the common case when the fancy processing is not included. */
2725
2726 config_file = Ufopen(filename, "rb");
2727 #endif
2728
2729 /* If the file does not exist, continue to try any others. For any other
2730 error, break out (and die). */
2731
2732 if (config_file != NULL || errno != ENOENT) break;
2733 }
2734
2735/* On success, save the name for verification; config_filename is used when
2736logging configuration errors (it changes for .included files) whereas
2737config_main_filename is the name shown by -bP. Failure to open a configuration
2738file is a serious disaster. */
2739
2740if (config_file != NULL)
2741 {
2742 config_filename = config_main_filename = string_copy(filename);
2743 }
2744else
2745 {
2746 if (filename == NULL)
2747 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2748 "%s", config_main_filelist);
2749 else
2750 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2751 "configuration file %s", filename));
2752 }
2753
2754/* Check the status of the file we have opened, unless it was specified on
2755the command line, in which case privilege was given away at the start. */
2756
2757if (!config_changed)
2758 {
2759 if (fstat(fileno(config_file), &statbuf) != 0)
2760 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2761 big_buffer);
2762
2763 if ((statbuf.st_uid != root_uid && /* owner not root */
2764 statbuf.st_uid != exim_uid /* owner not exim */
2765 #ifdef CONFIGURE_OWNER
2766 && statbuf.st_uid != config_uid /* owner not the special one */
2767 #endif
2768 ) || /* or */
35edf2ff
PH
2769 (statbuf.st_gid != exim_gid /* group not exim & */
2770 #ifdef CONFIGURE_GROUP
2771 && statbuf.st_gid != config_gid /* group not the special one */
8e669ac1 2772 #endif
35edf2ff 2773 && (statbuf.st_mode & 020) != 0) || /* group writeable */
059ec3d9
PH
2774 /* or */
2775 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2776
2777 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2778 "wrong owner, group, or mode", big_buffer);
2779 }
2780
2781/* Process the main configuration settings. They all begin with a lower case
2782letter. If we see something starting with an upper case letter, it is taken as
2783a macro definition. */
2784
2785while ((s = get_config_line()) != NULL)
2786 {
cf00dad6 2787 if (isupper(s[0])) read_macro_assignment(s);
059ec3d9
PH
2788
2789 else if (Ustrncmp(s, "domainlist", 10) == 0)
2790 read_named_list(&domainlist_anchor, &domainlist_count,
2791 MAX_NAMED_LIST, s+10, US"domain list");
2792
2793 else if (Ustrncmp(s, "hostlist", 8) == 0)
2794 read_named_list(&hostlist_anchor, &hostlist_count,
2795 MAX_NAMED_LIST, s+8, US"host list");
2796
2797 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2798 read_named_list(&addresslist_anchor, &addresslist_count,
2799 MAX_NAMED_LIST, s+11, US"address list");
2800
2801 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2802 read_named_list(&localpartlist_anchor, &localpartlist_count,
2803 MAX_NAMED_LIST, s+13, US"local part list");
2804
2805 else
2806 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2807 NULL, US"main option \"%s\" unknown");
2808 }
2809
2810
2811/* If local_sender_retain is set, local_from_check must be unset. */
2812
2813if (local_sender_retain && local_from_check)
2814 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2815 "local_sender_retain are set; this combination is not allowed");
2816
2817/* If the timezone string is empty, set it to NULL, implying no TZ variable
2818wanted. */
2819
2820if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2821
944a9c55
PH
2822/* The max retry interval must not be greater than 24 hours. */
2823
2824if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2825
059ec3d9
PH
2826/* remote_max_parallel must be > 0 */
2827
2828if (remote_max_parallel <= 0) remote_max_parallel = 1;
2829
6a3f1455
PH
2830/* Save the configured setting of freeze_tell, so we can re-instate it at the
2831start of a new SMTP message. */
2832
2833freeze_tell_config = freeze_tell;
2834
059ec3d9
PH
2835/* The primary host name may be required for expansion of spool_directory
2836and log_file_path, so make sure it is set asap. It is obtained from uname(),
2837but if that yields an unqualified value, make a FQDN by using gethostbyname to
2838canonize it. Some people like upper case letters in their host names, so we
2839don't force the case. */
2840
2841if (primary_hostname == NULL)
2842 {
2843 uschar *hostname;
2844 struct utsname uts;
2845 if (uname(&uts) < 0)
2846 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2847 hostname = US uts.nodename;
2848
2849 if (Ustrchr(hostname, '.') == NULL)
2850 {
2851 int af = AF_INET;
2852 struct hostent *hostdata;
2853
2854 #if HAVE_IPV6
7e66e54d 2855 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
059ec3d9 2856 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
7e66e54d 2857 TRUE, NULL) != OK))
059ec3d9
PH
2858 af = AF_INET6;
2859 #else
2860 af = AF_INET;
2861 #endif
2862
2863 for (;;)
2864 {
2865 #if HAVE_IPV6
2866 #if HAVE_GETIPNODEBYNAME
2867 int error_num;
2868 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2869 #else
2870 hostdata = gethostbyname2(CS hostname, af);
2871 #endif
2872 #else
2873 hostdata = gethostbyname(CS hostname);
2874 #endif
2875
2876 if (hostdata != NULL)
2877 {
2878 hostname = US hostdata->h_name;
2879 break;
2880 }
2881
2882 if (af == AF_INET) break;
2883 af = AF_INET;
2884 }
2885 }
2886
2887 primary_hostname = string_copy(hostname);
2888 }
2889
2890/* Set up default value for smtp_active_hostname */
2891
2892smtp_active_hostname = primary_hostname;
2893
2894/* If spool_directory wasn't set in the build-time configuration, it must have
2895got set above. Of course, writing to the log may not work if log_file_path is
2896not set, but it will at least get to syslog or somewhere, with any luck. */
2897
2898if (*spool_directory == 0)
2899 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2900 "proceed");
2901
2902/* Expand the spool directory name; it may, for example, contain the primary
2903host name. Same comment about failure. */
2904
2905s = expand_string(spool_directory);
2906if (s == NULL)
2907 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2908 "\"%s\": %s", spool_directory, expand_string_message);
2909spool_directory = s;
2910
2911/* Expand log_file_path, which must contain "%s" in any component that isn't
2912the null string or "syslog". It is also allowed to contain one instance of %D.
2913However, it must NOT contain % followed by anything else. */
2914
2915if (*log_file_path != 0)
2916 {
2917 uschar *ss, *sss;
2918 int sep = ':'; /* Fixed for log file path */
2919 s = expand_string(log_file_path);
2920 if (s == NULL)
2921 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2922 "\"%s\": %s", log_file_path, expand_string_message);
2923
2924 ss = s;
2925 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2926 {
2927 uschar *t;
2928 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2929 t = Ustrstr(sss, "%s");
2930 if (t == NULL)
2931 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2932 "contain \"%%s\"", sss);
2933 *t = 'X';
2934 t = Ustrchr(sss, '%');
2935 if (t != NULL)
2936 {
2937 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2938 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2939 "unexpected \"%%\" character", s);
2940 }
2941 }
2942
2943 log_file_path = s;
2944 }
2945
2946/* Interpret syslog_facility into an integer argument for 'ident' param to
2947openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2948leading "log_". */
2949
2950if (syslog_facility_str != NULL)
2951 {
2952 int i;
2953 uschar *s = syslog_facility_str;
2954
2955 if ((Ustrlen(syslog_facility_str) >= 4) &&
2956 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2957 s += 4;
2958
2959 for (i = 0; i < syslog_list_size; i++)
2960 {
2961 if (strcmpic(s, syslog_list[i].name) == 0)
2962 {
2963 syslog_facility = syslog_list[i].value;
2964 break;
2965 }
2966 }
2967
2968 if (i >= syslog_list_size)
2969 {
2970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2971 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2972 }
2973 }
2974
2975/* Expand pid_file_path */
2976
2977if (*pid_file_path != 0)
2978 {
2979 s = expand_string(pid_file_path);
2980 if (s == NULL)
2981 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2982 "\"%s\": %s", pid_file_path, expand_string_message);
2983 pid_file_path = s;
2984 }
2985
2986/* Compile the regex for matching a UUCP-style "From_" line in an incoming
2987message. */
2988
2989regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2990
2991/* Unpick the SMTP rate limiting options, if set */
2992
2993if (smtp_ratelimit_mail != NULL)
2994 {
2995 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2996 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2997 }
2998
2999if (smtp_ratelimit_rcpt != NULL)
3000 {
3001 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3002 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3003 }
3004
3005/* The qualify domains default to the primary host name */
3006
3007if (qualify_domain_sender == NULL)
3008 qualify_domain_sender = primary_hostname;
3009if (qualify_domain_recipient == NULL)
3010 qualify_domain_recipient = qualify_domain_sender;
3011
3012/* Setting system_filter_user in the configuration sets the gid as well if a
3013name is given, but a numerical value does not. */
3014
3015if (system_filter_uid_set && !system_filter_gid_set)
3016 {
3017 struct passwd *pw = getpwuid(system_filter_uid);
3018 if (pw == NULL)
3019 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3020 (long int)system_filter_uid);
3021 system_filter_gid = pw->pw_gid;
3022 system_filter_gid_set = TRUE;
3023 }
3024
3025/* If the errors_reply_to field is set, check that it is syntactically valid
3026and ensure it contains a domain. */
3027
3028if (errors_reply_to != NULL)
3029 {
3030 uschar *errmess;
3031 int start, end, domain;
3032 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3033 &start, &end, &domain, FALSE);
3034
3035 if (recipient == NULL)
3036 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3037 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3038
3039 if (domain == 0)
3040 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3041 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3042 }
3043
3044/* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3045smtp_accept_max must also be set. */
3046
3047if (smtp_accept_max == 0 &&
3048 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3049 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3050 "smtp_accept_max must be set if smtp_accept_queue or "
3051 "smtp_accept_max_per_host is set");
3052
3053/* Set up the host number if anything is specified. It is an expanded string
3054so that it can be computed from the host name, for example. We do this last
3055so as to ensure that everything else is set up before the expansion. */
3056
3057if (host_number_string != NULL)
3058 {
3059 uschar *end;
3060 uschar *s = expand_string(host_number_string);
3061 long int n = Ustrtol(s, &end, 0);
3062 while (isspace(*end)) end++;
3063 if (*end != 0)
3064 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3065 "localhost_number value is not a number: %s", s);
3066 if (n > LOCALHOST_MAX)
3067 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3068 "localhost_number is greater than the maximum allowed value (%d)",
3069 LOCALHOST_MAX);
3070 host_number = n;
3071 }
3072
3073#ifdef SUPPORT_TLS
3074/* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3075
3076if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3077 tls_verify_certificates == NULL)
3078 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3079 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3080 (tls_verify_hosts != NULL)? "" : "try_");
3081#endif
3082}
3083
3084
3085
3086/*************************************************
3087* Initialize one driver *
3088*************************************************/
3089
3090/* This is called once the driver's generic options, if any, have been read.
3091We can now find the driver, set up defaults for the private options, and
3092unset any "set" bits in the private options table (which might have been
3093set by another incarnation of the same driver).
3094
3095Arguments:
3096 d pointer to driver instance block, with generic
3097 options filled in
3098 drivers_available vector of available drivers
3099 size_of_info size of each block in drivers_available
3100 class class of driver, for error message
3101
3102Returns: pointer to the driver info block
3103*/
3104
3105static driver_info *
3106init_driver(driver_instance *d, driver_info *drivers_available,
3107 int size_of_info, uschar *class)
3108{
3109driver_info *dd;
3110
3111for (dd = drivers_available; dd->driver_name[0] != 0;
3112 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3113 {
3114 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3115 {
3116 int i;
3117 int len = dd->options_len;
3118 d->info = dd;
3119 d->options_block = store_get(len);
3120 memcpy(d->options_block, dd->options_block, len);
3121 for (i = 0; i < *(dd->options_count); i++)
3122 dd->options[i].type &= ~opt_set;
3123 return dd;
3124 }
3125 }
3126
3127log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3128 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3129
3130return NULL; /* never obeyed */
3131}
3132
3133
3134
3135
3136/*************************************************
3137* Initialize driver list *
3138*************************************************/
3139
3140/* This function is called for routers, transports, and authentication
3141mechanisms. It reads the data from the current point in the configuration file
3142up to the end of the section, and sets up a chain of instance blocks according
3143to the file's contents. The file will already have been opened by a call to
3144readconf_main, and must be left open for subsequent reading of further data.
3145
3146Any errors cause a panic crash. Note that the blocks with names driver_info and
3147driver_instance must map the first portions of all the _info and _instance
3148blocks for this shared code to work.
3149
3150Arguments:
3151 class "router", "transport", or "authenticator"
3152 anchor &routers, &transports, &auths
3153 drivers_available available drivers
3154 size_of_info size of each info block
3155 instance_default points to default data for an instance
3156 instance_size size of instance block
3157 driver_optionlist generic option list
3158 driver_optionlist_count count of generic option list
3159
3160Returns: nothing
3161*/
3162
3163void
3164readconf_driver_init(
3165 uschar *class,
3166 driver_instance **anchor,
3167 driver_info *drivers_available,
3168 int size_of_info,
3169 void *instance_default,
3170 int instance_size,
3171 optionlist *driver_optionlist,
3172 int driver_optionlist_count)
3173{
3174driver_instance **p = anchor;
3175driver_instance *d = NULL;
3176uschar *buffer;
3177
059ec3d9
PH
3178while ((buffer = get_config_line()) != NULL)
3179 {
3180 uschar name[64];
cf00dad6 3181 uschar *s;
059ec3d9 3182
cf00dad6
PH
3183 /* Read the first name on the line and test for the start of a new driver. A
3184 macro definition indicates the end of the previous driver. If this isn't the
3185 start of a new driver, the line will be re-read. */
059ec3d9 3186
cf00dad6
PH
3187 s = readconf_readname(name, sizeof(name), buffer);
3188
3189 /* Handle macro definition, first finishing off the initialization of the
3190 previous driver, if any. */
3191
3192 if (isupper(*name) && *s == '=')
3193 {
3194 if (d != NULL)
3195 {
3196 if (d->driver_name == NULL)
3197 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3198 "no driver defined for %s \"%s\"", class, d->name);
3199 (d->info->init)(d);
3200 d = NULL;
3201 }
3202 read_macro_assignment(buffer);
3203 continue;
3204 }
059ec3d9
PH
3205
3206 /* If the line starts with a name terminated by a colon, we are at the
3207 start of the definition of a new driver. The rest of the line must be
3208 blank. */
3209
3210 if (*s++ == ':')
3211 {
3212 int i;
3213
3214 /* Finish off initializing the previous driver. */
3215
3216 if (d != NULL)
3217 {
3218 if (d->driver_name == NULL)
3219 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3220 "no driver defined for %s \"%s\"", class, d->name);
3221 (d->info->init)(d);
3222 }
3223
3224 /* Check that we haven't already got a driver of this name */
3225
3226 for (d = *anchor; d != NULL; d = d->next)
3227 if (Ustrcmp(name, d->name) == 0)
3228 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3229 "there are two %ss called \"%s\"", class, name);
3230
3231 /* Set up a new driver instance data block on the chain, with
3232 its default values installed. */
3233
3234 d = store_get(instance_size);
3235 memcpy(d, instance_default, instance_size);
3236 *p = d;
3237 p = &(d->next);
3238 d->name = string_copy(name);
3239
3240 /* Clear out the "set" bits in the generic options */
3241
3242 for (i = 0; i < driver_optionlist_count; i++)
3243 driver_optionlist[i].type &= ~opt_set;
3244
3245 /* Check nothing more on this line, then do the next loop iteration. */
3246
3247 while (isspace(*s)) s++;
3248 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3249 continue;
3250 }
3251
cf00dad6
PH
3252 /* Not the start of a new driver. Give an error if we have not set up a
3253 current driver yet. */
059ec3d9
PH
3254
3255 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3256 "%s name missing", class);
3257
3258 /* First look to see if this is a generic option; if it is "driver",
3259 initialize the driver. If is it not a generic option, we can look for a
3260 private option provided that the driver has been previously set up. */
3261
3262 if (readconf_handle_option(buffer, driver_optionlist,
3263 driver_optionlist_count, d, NULL))
3264 {
3265 if (d->info == NULL && d->driver_name != NULL)
3266 init_driver(d, drivers_available, size_of_info, class);
3267 }
3268
3269 /* Handle private options - pass the generic block because some may
3270 live therein. A flag with each option indicates if it is in the public
3271 block. */
3272
3273 else if (d->info != NULL)
3274 {
3275 readconf_handle_option(buffer, d->info->options,
3276 *(d->info->options_count), d, US"option \"%s\" unknown");
3277 }
3278
3279 /* The option is not generic and the driver name has not yet been given. */
3280
3281 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3282 "(\"driver\" must be specified before any private options)", name);
3283 }
3284
3285/* Run the initialization function for the final driver. */
3286
3287if (d != NULL)
3288 {
3289 if (d->driver_name == NULL)
3290 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3291 "no driver defined for %s \"%s\"", class, d->name);
3292 (d->info->init)(d);
3293 }
3294}
3295
3296
3297
3298/*************************************************
3299* Check driver dependency *
3300*************************************************/
3301
3302/* This function is passed a driver instance and a string. It checks whether
3303any of the string options for the driver contains the given string as an
3304expansion variable.
3305
3306Arguments:
3307 d points to a driver instance block
3308 s the string to search for
3309
3310Returns: TRUE if a dependency is found
3311*/
3312
3313BOOL
3314readconf_depends(driver_instance *d, uschar *s)
3315{
3316int count = *(d->info->options_count);
3317optionlist *ol;
3318uschar *ss;
3319
3320for (ol = d->info->options; ol < d->info->options + count; ol++)
3321 {
3322 void *options_block;
3323 uschar *value;
3324 int type = ol->type & opt_mask;
3325 if (type != opt_stringptr) continue;
3326 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3327 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3328 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3329 {
3330 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3331 isalnum(ss[Ustrlen(s)])) continue;
3332 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3333 d->name, ol->name, s);
3334 return TRUE;
3335 }
3336 }
3337
3338DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3339return FALSE;
3340}
3341
3342
3343
3344
3345/*************************************************
3346* Decode an error type for retries *
3347*************************************************/
3348
3349/* This function is global because it is also called from the main
3350program when testing retry information. It decodes strings such as "quota_7d"
3351into numerical error codes.
3352
3353Arguments:
3354 pp points to start of text
3355 p points past end of text
3356 basic_errno points to an int to receive the main error number
3357 more_errno points to an int to receive the secondary error data
3358
3359Returns: NULL if decoded correctly; else points to error text
3360*/
3361
3362uschar *
3363readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3364{
3365int len;
3366uschar *q = pp;
3367while (q < p && *q != '_') q++;
3368len = q - pp;
3369
3370if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3371 {
3372 *basic_errno = ERRNO_EXIMQUOTA;
3373 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3374 return US"bad time value";
3375 }
3376
3377else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3378 {
3379 *basic_errno = ECONNREFUSED;
3380 if (q != p)
3381 {
3382 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3383 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3384 else return US"A or MX expected after \"refused\"";
3385 }
3386 }
3387
3388else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3389 {
3390 *basic_errno = ETIMEDOUT;
3391 if (q != p)
3392 {
3393 int i;
3394 int xlen = p - q - 1;
3395 uschar *x = q + 1;
3396
3397 static uschar *extras[] =
3398 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3399 static int values[] =
3400 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3401
3402 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3403 {
3404 if (strncmpic(x, extras[i], xlen) == 0)
3405 {
3406 *more_errno = values[i];
3407 break;
3408 }
3409 }
3410
3411 if (i >= sizeof(extras)/sizeof(uschar *))
3412 {
3413 if (strncmpic(x, US"DNS", xlen) == 0)
3414 {
3415 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3416 "available in retry rules (it has never worked) - treated as "
3417 "\"timeout\"");
3418 }
3419 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3420 }
3421 }
3422 }
3423
e97957bc
PH
3424else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3425 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3426 strncmpic(pp, US"data_4", 6) == 0)
059ec3d9
PH
3427 {
3428 BOOL bad = FALSE;
3429 int x = 255; /* means "any 4xx code" */
3430 if (p != pp + 8) bad = TRUE; else
3431 {
3432 int a = pp[6], b = pp[7];
3433 if (isdigit(a))
3434 {
3435 x = (a - '0') * 10;
3436 if (isdigit(b)) x += b - '0';
3437 else if (b == 'x') x += 100;
3438 else bad = TRUE;
3439 }
3440 else if (a != 'x' || b != 'x') bad = TRUE;
3441 }
3442
e97957bc
PH
3443 if (bad)
3444 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3445 "x is literal and d is any digit", pp);
059ec3d9 3446
e97957bc
PH
3447 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3448 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
059ec3d9
PH
3449 *more_errno = x << 8;
3450 }
3451
3452else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3453 strncmpic(q+1, US"failed", p-q-1) == 0)
059ec3d9 3454 *basic_errno = ERRNO_AUTHFAIL;
e97957bc
PH
3455
3456else if (strcmpic(pp, US"lost_connection") == 0)
3457 *basic_errno = ERRNO_SMTPCLOSED;
3458
3459else if (strcmpic(pp, US"tls_required") == 0)
3460 *basic_errno = ERRNO_TLSREQUIRED;
059ec3d9
PH
3461
3462else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3463 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3464
3465return NULL;
3466}
3467
3468
3469
3470
3471/*************************************************
3472* Read retry information *
3473*************************************************/
3474
3475/* Each line of retry information contains:
3476
3477. A domain name pattern or an address pattern;
3478
3479. An error name, possibly with additional data, or *;
3480
3481. An optional sequence of retry items, each consisting of an identifying
3482 letter, a cutoff time, and optional parameters.
3483
3484All this is decoded and placed into a control block. */
3485
3486
3487/* Subroutine to read an argument, preceded by a comma and terminated
3488by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
34891 = fixed point number (returned *1000).
3490
3491Arguments:
3492 paddr pointer to pointer to current character; updated
3493 type 0 => read a time; 1 => read a fixed point number
3494
3495Returns: time in seconds or fixed point number * 1000
3496*/
3497
3498static int
3499retry_arg(uschar **paddr, int type)
3500{
3501uschar *p = *paddr;
3502uschar *pp;
3503
3504if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3505
3506while (isspace(*p)) p++;
3507pp = p;
3508while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3509
3510if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3511 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3512
3513*paddr = p;
3514switch (type)
3515 {
3516 case 0:
3517 return readconf_readtime(pp, *p, FALSE);
3518 case 1:
3519 return readconf_readfixed(pp, *p);
3520 }
3521return 0; /* Keep picky compilers happy */
3522}
3523
3524/* The function proper */
3525
3526void
3527readconf_retries(void)
3528{
3529retry_config **chain = &retries;
3530retry_config *next;
3531uschar *p;
3532
3533while ((p = get_config_line()) != NULL)
3534 {
3535 retry_rule **rchain;
3536 uschar *pp, *error;
3537
3538 next = store_get(sizeof(retry_config));
3539 next->next = NULL;
3540 *chain = next;
3541 chain = &(next->next);
3542 next->basic_errno = next->more_errno = 0;
3543 next->senders = NULL;
3544 next->rules = NULL;
3545 rchain = &(next->rules);
3546
3547 next->pattern = string_dequote(&p);
3548 while (isspace(*p)) p++;
3549 pp = p;
3550 while (mac_isgraph(*p)) p++;
3551 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3552 "missing error type");
3553
3554 /* Test error names for things we understand. */
3555
3556 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3557 &(next->more_errno))) != NULL)
3558 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3559
3560 /* There may be an optional address list of senders to be used as another
3561 constraint on the rule. This was added later, so the syntax is a bit of a
3562 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3563 an address list. */
3564
3565 while (isspace(*p)) p++;
3566 if (Ustrncmp(p, "senders", 7) == 0)
3567 {
3568 p += 7;
3569 while (isspace(*p)) p++;
3570 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3571 "\"=\" expected after \"senders\" in retry rule");
3572 while (isspace(*p)) p++;
3573 next->senders = string_dequote(&p);
3574 }
3575
3576 /* Now the retry rules. Keep the maximum timeout encountered. */
3577
3578 while (isspace(*p)) p++;
3579
3580 while (*p != 0)
3581 {
3582 retry_rule *rule = store_get(sizeof(retry_rule));
3583 *rchain = rule;
3584 rchain = &(rule->next);
3585 rule->next = NULL;
3586 rule->rule = toupper(*p++);
3587 rule->timeout = retry_arg(&p, 0);
3588 if (rule->timeout > retry_maximum_timeout)
3589 retry_maximum_timeout = rule->timeout;
3590
3591 switch (rule->rule)
3592 {
3593 case 'F': /* Fixed interval */
3594 rule->p1 = retry_arg(&p, 0);
3595 break;
3596
3597 case 'G': /* Geometrically increasing intervals */
6af56900 3598 case 'H': /* Ditto, but with randomness */
059ec3d9
PH
3599 rule->p1 = retry_arg(&p, 0);
3600 rule->p2 = retry_arg(&p, 1);
3601 break;
3602
3603 default:
3604 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3605 break;
3606 }
3607
3608 if (rule->timeout <= 0 || rule->p1 <= 0 ||
6af56900 3609 (rule->rule != 'F' && rule->p2 < 1000))
059ec3d9
PH
3610 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3611 "bad parameters for retry rule");
3612
3613 while (isspace(*p)) p++;
3614 if (*p == ';')
3615 {
3616 p++;
3617 while (isspace(*p)) p++;
3618 }
3619 else if (*p != 0)
3620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3621 }
3622 }
3623}
3624
3625
3626
3627/*************************************************
3628* Initialize authenticators *
3629*************************************************/
3630
3631/* Read the authenticators section of the configuration file.
3632
3633Arguments: none
3634Returns: nothing
3635*/
3636
3637static void
3638auths_init(void)
3639{
3640auth_instance *au, *bu;
3641readconf_driver_init(US"authenticator",
3642 (driver_instance **)(&auths), /* chain anchor */
3643 (driver_info *)auths_available, /* available drivers */
3644 sizeof(auth_info), /* size of info block */
3645 &auth_defaults, /* default values for generic options */
3646 sizeof(auth_instance), /* size of instance block */
3647 optionlist_auths, /* generic options */
3648 optionlist_auths_size);
3649
3650for (au = auths; au != NULL; au = au->next)
3651 {
3652 if (au->public_name == NULL)
3653 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3654 "the %s authenticator", au->name);
3655 for (bu = au->next; bu != NULL; bu = bu->next)
3656 {
3657 if (strcmpic(au->public_name, bu->public_name) == 0)
3658 {
3659 if ((au->client && bu->client) || (au->server && bu->server))
3660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3661 "(%s and %s) have the same public name (%s)",
3662 (au->client)? US"client" : US"server", au->name, bu->name,
3663 au->public_name);
3664 }
3665 }
3666 }
3667}
3668
3669
3670
3671
3672/*************************************************
3673* Read ACL information *
3674*************************************************/
3675
3676/* If this run of Exim is not doing something that involves receiving a
3677message, we can just skip over the ACL information. No need to parse it.
3678
3679First, we have a function for acl_read() to call back to get the next line. We
3680need to remember the line we passed, because at the end it will contain the
3681name of the next ACL. */
3682
3683static uschar *acl_line;
3684
3685static uschar *
3686acl_callback(void)
3687{
3688acl_line = get_config_line();
3689return acl_line;
3690}
3691
3692
3693/* Now the main function:
3694
3695Arguments:
3696 skip TRUE when this Exim process is doing something that will
3697 not need the ACL data
3698
3699Returns: nothing
3700*/
3701
3702static void
3703readconf_acl(BOOL skip)
3704{
3705uschar *p;
3706
3707/* Not receiving messages, don't need to parse the ACL data */
3708
3709if (skip)
3710 {
3711 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3712 while ((p = get_config_line()) != NULL);
3713 return;
3714 }
3715
cf00dad6
PH
3716/* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3717between ACLs. */
059ec3d9
PH
3718
3719acl_line = get_config_line();
3720
3721while(acl_line != NULL)
3722 {
3723 uschar name[64];
3724 tree_node *node;
3725 uschar *error;
3726
3727 p = readconf_readname(name, sizeof(name), acl_line);
cf00dad6
PH
3728 if (isupper(*name) && *p == '=')
3729 {
3730 read_macro_assignment(acl_line);
3731 acl_line = get_config_line();
3732 continue;
3733 }
3734
3735 if (*p != ':' || name[0] == 0)
3736 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
059ec3d9
PH
3737
3738 node = store_get(sizeof(tree_node) + Ustrlen(name));
3739 Ustrcpy(node->name, name);
3740 if (!tree_insertnode(&acl_anchor, node))
3741 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3742 "there are two ACLs called \"%s\"", name);
3743
3744 node->data.ptr = acl_read(acl_callback, &error);
3745
3746 if (node->data.ptr == NULL && error != NULL)
3747 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3748 }
3749}
3750
3751
3752
3753/*************************************************
3754* Read configuration for local_scan() *
3755*************************************************/
3756
3757/* This function is called after "begin local_scan" is encountered in the
3758configuration file. If the local_scan() function allows for configuration
3759options, we can process them. Otherwise, we expire in a panic.
3760
3761Arguments: none
3762Returns: nothing
3763*/
3764
3765static void
3766local_scan_init(void)
3767{
3768#ifndef LOCAL_SCAN_HAS_OPTIONS
3769log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3770 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3771#else
3772
3773uschar *p;
3774while ((p = get_config_line()) != NULL)
3775 {
3776 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3777 NULL, US"local_scan option \"%s\" unknown");
3778 }
3779#endif
3780}
3781
3782
3783
3784/*************************************************
3785* Read rest of configuration (after main) *
3786*************************************************/
3787
3788/* This function reads the rest of the runtime configuration, after the main
3789configuration. It is called only when actually needed. Each subsequent section
3790of the configuration starts with a line of the form
3791
3792 begin name
3793
3794where the name is "routers", "transports", etc. A section is terminated by
3795hitting the next "begin" line, and the next name is left in next_section.
3796Because it may confuse people as to whether the names are singular or plural,
3797we add "s" if it's missing. There is always enough room in next_section for
3798this. This function is basically just a switch.
3799
3800Arguments:
3801 skip_acl TRUE if ACL information is not needed
3802
3803Returns: nothing
3804*/
3805
3806static uschar *section_list[] = {
3807 US"acls",
3808 US"authenticators",
3809 US"local_scans",
3810 US"retrys",
3811 US"rewrites",
3812 US"routers",
3813 US"transports"};
3814
3815void
3816readconf_rest(BOOL skip_acl)
3817{
3818int had = 0;
3819
3820while(next_section[0] != 0)
3821 {
3822 int bit;
3823 int first = 0;
3824 int last = sizeof(section_list) / sizeof(uschar *);
3825 int mid = last/2;
3826 int n = Ustrlen(next_section);
3827
3828 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3829
3830 for (;;)
3831 {
3832 int c = strcmpic(next_section, section_list[mid]);
3833 if (c == 0) break;
3834 if (c > 0) first = mid + 1; else last = mid;
3835 if (first >= last)
3836 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3837 "\"%.*s\" is not a known configuration section name", n, next_section);
3838 mid = (last + first)/2;
3839 }
3840
3841 bit = 1 << mid;
3842 if (((had ^= bit) & bit) == 0)
3843 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3844 "\"%.*s\" section is repeated in the configuration file", n,
3845 next_section);
3846
3847 switch(mid)
3848 {
3849 case 0: readconf_acl(skip_acl); break;
3850 case 1: auths_init(); break;
3851 case 2: local_scan_init(); break;
3852 case 3: readconf_retries(); break;
3853 case 4: readconf_rewrites(); break;
3854 case 5: route_init(); break;
3855 case 6: transport_init(); break;
3856 }
3857 }
3858
f1e894f3 3859(void)fclose(config_file);
059ec3d9
PH
3860}
3861
3862/* End of readconf.c */