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Guard SNI usage better (client-side)
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #define CSTATE_STACK_SIZE 10
15
16
17 /* Structure for chain (stack) of .included files */
18
19 typedef struct config_file_item {
20 struct config_file_item *next;
21 uschar *filename;
22 FILE *file;
23 int lineno;
24 } config_file_item;
25
26 /* Structure of table of conditional words and their state transitions */
27
28 typedef struct cond_item {
29 uschar *name;
30 int namelen;
31 int action1;
32 int action2;
33 int pushpop;
34 } cond_item;
35
36 /* Structure of table of syslog facility names and values */
37
38 typedef struct syslog_fac_item {
39 uschar *name;
40 int value;
41 } syslog_fac_item;
42
43
44 /* Static variables */
45
46 static config_file_item *config_file_stack = NULL; /* For includes */
47
48 static uschar *syslog_facility_str = NULL;
49 static uschar next_section[24];
50 static uschar time_buffer[24];
51
52 /* State variables for conditional loading (.ifdef / .else / .endif) */
53
54 static int cstate = 0;
55 static int cstate_stack_ptr = -1;
56 static int cstate_stack[CSTATE_STACK_SIZE];
57
58 /* Table of state transitions for handling conditional inclusions. There are
59 four possible state transitions:
60
61 .ifdef true
62 .ifdef false
63 .elifdef true (or .else)
64 .elifdef false
65
66 .endif just causes the previous cstate to be popped off the stack */
67
68 static int next_cstate[3][4] =
69 {
70 /* State 0: reading from file, or reading until next .else or .endif */
71 { 0, 1, 2, 2 },
72 /* State 1: condition failed, skipping until next .else or .endif */
73 { 2, 2, 0, 1 },
74 /* State 2: skipping until .endif */
75 { 2, 2, 2, 2 },
76 };
77
78 /* Table of conditionals and the states to set. For each name, there are four
79 values: the length of the name (to save computing it each time), the state to
80 set if a macro was found in the line, the state to set if a macro was not found
81 in the line, and a stack manipulation setting which is:
82
83 -1 pull state value off the stack
84 0 don't alter the stack
85 +1 push value onto stack, before setting new state
86 */
87
88 static cond_item cond_list[] = {
89 { US"ifdef", 5, 0, 1, 1 },
90 { US"ifndef", 6, 1, 0, 1 },
91 { US"elifdef", 7, 2, 3, 0 },
92 { US"elifndef", 8, 3, 2, 0 },
93 { US"else", 4, 2, 2, 0 },
94 { US"endif", 5, 0, 0, -1 }
95 };
96
97 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
98
99 /* Table of syslog facility names and their values */
100
101 static syslog_fac_item syslog_list[] = {
102 { US"mail", LOG_MAIL },
103 { US"user", LOG_USER },
104 { US"news", LOG_NEWS },
105 { US"uucp", LOG_UUCP },
106 { US"local0", LOG_LOCAL0 },
107 { US"local1", LOG_LOCAL1 },
108 { US"local2", LOG_LOCAL2 },
109 { US"local3", LOG_LOCAL3 },
110 { US"local4", LOG_LOCAL4 },
111 { US"local5", LOG_LOCAL5 },
112 { US"local6", LOG_LOCAL6 },
113 { US"local7", LOG_LOCAL7 },
114 { US"daemon", LOG_DAEMON }
115 };
116
117 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
118
119
120
121
122 /*************************************************
123 * Main configuration options *
124 *************************************************/
125
126 /* The list of options that can be set in the main configuration file. This
127 must be in alphabetic order because it is searched by binary chop. */
128
129 static optionlist optionlist_config[] = {
130 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
131 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
132 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
133 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
134 { "accept_8bitmime", opt_bool, &accept_8bitmime },
135 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
136 #ifdef WITH_CONTENT_SCAN
137 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
138 #endif
139 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
140 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
141 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
142 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
143 #ifndef DISABLE_DKIM
144 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
145 #endif
146 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
147 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
148 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
149 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
150 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
151 #ifdef WITH_CONTENT_SCAN
152 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
153 #endif
154 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
155 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
156 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
157 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
158 #ifdef SUPPORT_TLS
159 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
160 #endif
161 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
162 { "admin_groups", opt_gidlist, &admin_groups },
163 { "allow_domain_literals", opt_bool, &allow_domain_literals },
164 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
165 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
166 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
167 { "auto_thaw", opt_time, &auto_thaw },
168 #ifdef WITH_CONTENT_SCAN
169 { "av_scanner", opt_stringptr, &av_scanner },
170 #endif
171 { "bi_command", opt_stringptr, &bi_command },
172 #ifdef EXPERIMENTAL_BRIGHTMAIL
173 { "bmi_config_file", opt_stringptr, &bmi_config_file },
174 #endif
175 { "bounce_message_file", opt_stringptr, &bounce_message_file },
176 { "bounce_message_text", opt_stringptr, &bounce_message_text },
177 { "bounce_return_body", opt_bool, &bounce_return_body },
178 { "bounce_return_message", opt_bool, &bounce_return_message },
179 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
180 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
181 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
182 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
183 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
184 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
185 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
186 { "check_log_inodes", opt_int, &check_log_inodes },
187 { "check_log_space", opt_Kint, &check_log_space },
188 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
189 { "check_spool_inodes", opt_int, &check_spool_inodes },
190 { "check_spool_space", opt_Kint, &check_spool_space },
191 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
192 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
193 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
194 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
195 #ifdef EXPERIMENTAL_DCC
196 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
197 { "dccifd_address", opt_stringptr, &dccifd_address },
198 { "dccifd_options", opt_stringptr, &dccifd_options },
199 #endif
200 { "delay_warning", opt_timelist, &delay_warning },
201 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
202 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
203 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
204 { "delivery_date_remove", opt_bool, &delivery_date_remove },
205 #ifdef ENABLE_DISABLE_FSYNC
206 { "disable_fsync", opt_bool, &disable_fsync },
207 #endif
208 { "disable_ipv6", opt_bool, &disable_ipv6 },
209 #ifndef DISABLE_DKIM
210 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
211 #endif
212 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
213 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
214 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
215 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
216 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
217 { "dns_retrans", opt_time, &dns_retrans },
218 { "dns_retry", opt_int, &dns_retry },
219 { "dns_use_edns0", opt_int, &dns_use_edns0 },
220 /* This option is now a no-op, retained for compability */
221 { "drop_cr", opt_bool, &drop_cr },
222 /*********************************************************/
223 { "dsn_from", opt_stringptr, &dsn_from },
224 { "envelope_to_remove", opt_bool, &envelope_to_remove },
225 { "errors_copy", opt_stringptr, &errors_copy },
226 { "errors_reply_to", opt_stringptr, &errors_reply_to },
227 { "exim_group", opt_gid, &exim_gid },
228 { "exim_path", opt_stringptr, &exim_path },
229 { "exim_user", opt_uid, &exim_uid },
230 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
231 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
232 { "finduser_retries", opt_int, &finduser_retries },
233 { "freeze_tell", opt_stringptr, &freeze_tell },
234 { "gecos_name", opt_stringptr, &gecos_name },
235 { "gecos_pattern", opt_stringptr, &gecos_pattern },
236 #ifdef SUPPORT_TLS
237 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
238 /* These three gnutls_require_* options stopped working in Exim 4.80 */
239 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
240 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
241 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
242 #endif
243 { "header_line_maxsize", opt_int, &header_line_maxsize },
244 { "header_maxsize", opt_int, &header_maxsize },
245 { "headers_charset", opt_stringptr, &headers_charset },
246 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
247 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
248 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
249 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
250 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
251 { "hold_domains", opt_stringptr, &hold_domains },
252 { "host_lookup", opt_stringptr, &host_lookup },
253 { "host_lookup_order", opt_stringptr, &host_lookup_order },
254 { "host_reject_connection", opt_stringptr, &host_reject_connection },
255 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
256 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
257 #ifdef LOOKUP_IBASE
258 { "ibase_servers", opt_stringptr, &ibase_servers },
259 #endif
260 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
261 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
262 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
263 { "keep_malformed", opt_time, &keep_malformed },
264 #ifdef LOOKUP_LDAP
265 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
266 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
267 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
268 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
269 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
270 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
271 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
272 { "ldap_start_tls", opt_bool, &eldap_start_tls },
273 { "ldap_version", opt_int, &eldap_version },
274 #endif
275 { "local_from_check", opt_bool, &local_from_check },
276 { "local_from_prefix", opt_stringptr, &local_from_prefix },
277 { "local_from_suffix", opt_stringptr, &local_from_suffix },
278 { "local_interfaces", opt_stringptr, &local_interfaces },
279 { "local_scan_timeout", opt_time, &local_scan_timeout },
280 { "local_sender_retain", opt_bool, &local_sender_retain },
281 { "localhost_number", opt_stringptr, &host_number_string },
282 { "log_file_path", opt_stringptr, &log_file_path },
283 { "log_selector", opt_stringptr, &log_selector_string },
284 { "log_timezone", opt_bool, &log_timezone },
285 { "lookup_open_max", opt_int, &lookup_open_max },
286 { "max_username_length", opt_int, &max_username_length },
287 { "message_body_newlines", opt_bool, &message_body_newlines },
288 { "message_body_visible", opt_mkint, &message_body_visible },
289 { "message_id_header_domain", opt_stringptr, &message_id_domain },
290 { "message_id_header_text", opt_stringptr, &message_id_text },
291 { "message_logs", opt_bool, &message_logs },
292 { "message_size_limit", opt_stringptr, &message_size_limit },
293 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
294 { "move_frozen_messages", opt_bool, &move_frozen_messages },
295 #endif
296 { "mua_wrapper", opt_bool, &mua_wrapper },
297 #ifdef LOOKUP_MYSQL
298 { "mysql_servers", opt_stringptr, &mysql_servers },
299 #endif
300 { "never_users", opt_uidlist, &never_users },
301 #ifdef SUPPORT_TLS
302 { "openssl_options", opt_stringptr, &openssl_options },
303 #endif
304 #ifdef LOOKUP_ORACLE
305 { "oracle_servers", opt_stringptr, &oracle_servers },
306 #endif
307 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
308 #ifdef EXIM_PERL
309 { "perl_at_start", opt_bool, &opt_perl_at_start },
310 { "perl_startup", opt_stringptr, &opt_perl_startup },
311 #endif
312 #ifdef LOOKUP_PGSQL
313 { "pgsql_servers", opt_stringptr, &pgsql_servers },
314 #endif
315 { "pid_file_path", opt_stringptr, &pid_file_path },
316 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
317 { "preserve_message_logs", opt_bool, &preserve_message_logs },
318 { "primary_hostname", opt_stringptr, &primary_hostname },
319 { "print_topbitchars", opt_bool, &print_topbitchars },
320 { "process_log_path", opt_stringptr, &process_log_path },
321 { "prod_requires_admin", opt_bool, &prod_requires_admin },
322 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
323 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
324 { "queue_domains", opt_stringptr, &queue_domains },
325 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
326 { "queue_only", opt_bool, &queue_only },
327 { "queue_only_file", opt_stringptr, &queue_only_file },
328 { "queue_only_load", opt_fixed, &queue_only_load },
329 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
330 { "queue_only_override", opt_bool, &queue_only_override },
331 { "queue_run_in_order", opt_bool, &queue_run_in_order },
332 { "queue_run_max", opt_int, &queue_run_max },
333 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
334 { "receive_timeout", opt_time, &receive_timeout },
335 { "received_header_text", opt_stringptr, &received_header_text },
336 { "received_headers_max", opt_int, &received_headers_max },
337 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
338 { "recipients_max", opt_int, &recipients_max },
339 { "recipients_max_reject", opt_bool, &recipients_max_reject },
340 { "remote_max_parallel", opt_int, &remote_max_parallel },
341 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
342 { "retry_data_expire", opt_time, &retry_data_expire },
343 { "retry_interval_max", opt_time, &retry_interval_max },
344 { "return_path_remove", opt_bool, &return_path_remove },
345 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
346 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
347 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
348 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
349 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
350 { "smtp_accept_max", opt_int, &smtp_accept_max },
351 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
352 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
353 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
354 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
355 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
356 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
357 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
358 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
359 { "smtp_banner", opt_stringptr, &smtp_banner },
360 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
361 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
362 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
363 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
364 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
365 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
366 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
367 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
368 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
369 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
370 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
371 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
372 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
373 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
374 #ifdef WITH_CONTENT_SCAN
375 { "spamd_address", opt_stringptr, &spamd_address },
376 #endif
377 #ifdef EXPERIMENTAL_SPF
378 { "spf_guess", opt_stringptr, &spf_guess },
379 #endif
380 { "split_spool_directory", opt_bool, &split_spool_directory },
381 { "spool_directory", opt_stringptr, &spool_directory },
382 #ifdef LOOKUP_SQLITE
383 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
384 #endif
385 #ifdef EXPERIMENTAL_SRS
386 { "srs_config", opt_stringptr, &srs_config },
387 { "srs_hashlength", opt_int, &srs_hashlength },
388 { "srs_hashmin", opt_int, &srs_hashmin },
389 { "srs_maxage", opt_int, &srs_maxage },
390 { "srs_secrets", opt_stringptr, &srs_secrets },
391 { "srs_usehash", opt_bool, &srs_usehash },
392 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
393 #endif
394 { "strict_acl_vars", opt_bool, &strict_acl_vars },
395 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
396 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
397 { "syslog_duplication", opt_bool, &syslog_duplication },
398 { "syslog_facility", opt_stringptr, &syslog_facility_str },
399 { "syslog_processname", opt_stringptr, &syslog_processname },
400 { "syslog_timestamp", opt_bool, &syslog_timestamp },
401 { "system_filter", opt_stringptr, &system_filter },
402 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
403 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
404 { "system_filter_group", opt_gid, &system_filter_gid },
405 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
406 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
407 { "system_filter_user", opt_uid, &system_filter_uid },
408 { "tcp_nodelay", opt_bool, &tcp_nodelay },
409 #ifdef USE_TCP_WRAPPERS
410 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
411 #endif
412 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
413 { "timezone", opt_stringptr, &timezone_string },
414 #ifdef SUPPORT_TLS
415 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
416 { "tls_certificate", opt_stringptr, &tls_certificate },
417 { "tls_crl", opt_stringptr, &tls_crl },
418 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
419 { "tls_dhparam", opt_stringptr, &tls_dhparam },
420 #if defined(EXPERIMENTAL_OCSP) && !defined(USE_GNUTLS)
421 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
422 #endif
423 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
424 { "tls_privatekey", opt_stringptr, &tls_privatekey },
425 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
426 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
427 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
428 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
429 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
430 #endif
431 { "trusted_groups", opt_gidlist, &trusted_groups },
432 { "trusted_users", opt_uidlist, &trusted_users },
433 { "unknown_login", opt_stringptr, &unknown_login },
434 { "unknown_username", opt_stringptr, &unknown_username },
435 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
436 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
437 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
438 { "warn_message_file", opt_stringptr, &warn_message_file },
439 { "write_rejectlog", opt_bool, &write_rejectlog }
440 };
441
442 static int optionlist_config_size =
443 sizeof(optionlist_config)/sizeof(optionlist);
444
445
446
447 /*************************************************
448 * Find the name of an option *
449 *************************************************/
450
451 /* This function is to aid debugging. Various functions take arguments that are
452 pointer variables in the options table or in option tables for various drivers.
453 For debugging output, it is useful to be able to find the name of the option
454 which is currently being processed. This function finds it, if it exists, by
455 searching the table(s).
456
457 Arguments: a value that is presumed to be in the table above
458 Returns: the option name, or an empty string
459 */
460
461 uschar *
462 readconf_find_option(void *p)
463 {
464 int i;
465 router_instance *r;
466 transport_instance *t;
467
468 for (i = 0; i < optionlist_config_size; i++)
469 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
470
471 for (r = routers; r != NULL; r = r->next)
472 {
473 router_info *ri = r->info;
474 for (i = 0; i < ri->options_count[0]; i++)
475 {
476 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
477 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
478 return US ri->options[i].name;
479 }
480 }
481
482 for (t = transports; t != NULL; t = t->next)
483 {
484 transport_info *ti = t->info;
485 for (i = 0; i < ti->options_count[0]; i++)
486 {
487 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
488 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
489 return US ti->options[i].name;
490 }
491 }
492
493 return US"";
494 }
495
496
497
498
499 /*************************************************
500 * Deal with an assignment to a macro *
501 *************************************************/
502
503 /* This function is called when a line that starts with an upper case letter is
504 encountered. The argument "line" should contain a complete logical line, and
505 start with the first letter of the macro name. The macro name and the
506 replacement text are extracted and stored. Redefinition of existing,
507 non-command line, macros is permitted using '==' instead of '='.
508
509 Arguments:
510 s points to the start of the logical line
511
512 Returns: nothing
513 */
514
515 static void
516 read_macro_assignment(uschar *s)
517 {
518 uschar name[64];
519 int namelen = 0;
520 BOOL redef = FALSE;
521 macro_item *m;
522 macro_item *mlast = NULL;
523
524 while (isalnum(*s) || *s == '_')
525 {
526 if (namelen >= sizeof(name) - 1)
527 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
528 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
529 name[namelen++] = *s++;
530 }
531 name[namelen] = 0;
532
533 while (isspace(*s)) s++;
534 if (*s++ != '=')
535 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
536
537 if (*s == '=')
538 {
539 redef = TRUE;
540 s++;
541 }
542 while (isspace(*s)) s++;
543
544 /* If an existing macro of the same name was defined on the command line, we
545 just skip this definition. It's an error to attempt to redefine a macro without
546 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
547 It is also an error to define a macro whose name begins with the name of a
548 previously defined macro. Note: it is documented that the other way round
549 works. */
550
551 for (m = macros; m != NULL; m = m->next)
552 {
553 int len = Ustrlen(m->name);
554
555 if (Ustrcmp(m->name, name) == 0)
556 {
557 if (!m->command_line && !redef)
558 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
559 "defined (use \"==\" if you want to redefine it", name);
560 break;
561 }
562
563 if (len < namelen && Ustrstr(name, m->name) != NULL)
564 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
565 "a macro because previously defined macro \"%s\" is a substring",
566 name, m->name);
567
568 /* We cannot have this test, because it is documented that a substring
569 macro is permitted (there is even an example).
570 *
571 * if (len > namelen && Ustrstr(m->name, name) != NULL)
572 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
573 * "a macro because it is a substring of previously defined macro \"%s\"",
574 * name, m->name);
575 */
576
577 mlast = m;
578 }
579
580 /* Check for an overriding command-line definition. */
581
582 if (m != NULL && m->command_line) return;
583
584 /* Redefinition must refer to an existing macro. */
585
586 if (redef)
587 {
588 if (m == NULL)
589 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
590 "\"%s\"", name);
591 }
592
593 /* We have a new definition. The macro_item structure includes a final vector
594 called "name" which is one byte long. Thus, adding "namelen" gives us enough
595 room to store the "name" string. */
596
597 else
598 {
599 m = store_get(sizeof(macro_item) + namelen);
600 if (macros == NULL) macros = m; else mlast->next = m;
601 Ustrncpy(m->name, name, namelen);
602 m->name[namelen] = 0;
603 m->next = NULL;
604 m->command_line = FALSE;
605 }
606
607 /* Set the value of the new or redefined macro */
608
609 m->replacement = string_copy(s);
610 }
611
612
613
614
615
616 /*************************************************
617 * Read configuration line *
618 *************************************************/
619
620 /* A logical line of text is read from the configuration file into the big
621 buffer, taking account of macros, .includes, and continuations. The size of
622 big_buffer is increased if necessary. The count of configuration lines is
623 maintained. Physical input lines starting with # (ignoring leading white space,
624 and after macro replacement) and empty logical lines are always ignored.
625 Leading and trailing spaces are removed.
626
627 If we hit a line of the form "begin xxxx", the xxxx is placed in the
628 next_section vector, and the function returns NULL, indicating the end of a
629 configuration section. On end-of-file, NULL is returned with next_section
630 empty.
631
632 Arguments: none
633
634 Returns: a pointer to the first non-blank in the line,
635 or NULL if eof or end of section is reached
636 */
637
638 static uschar *
639 get_config_line(void)
640 {
641 int startoffset = 0; /* To first non-blank char in logical line */
642 int len = 0; /* Of logical line so far */
643 int newlen;
644 uschar *s, *ss;
645 macro_item *m;
646 BOOL macro_found;
647
648 /* Loop for handling continuation lines, skipping comments, and dealing with
649 .include files. */
650
651 for (;;)
652 {
653 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
654 {
655 if (config_file_stack != NULL) /* EOF inside .include */
656 {
657 (void)fclose(config_file);
658 config_file = config_file_stack->file;
659 config_filename = config_file_stack->filename;
660 config_lineno = config_file_stack->lineno;
661 config_file_stack = config_file_stack->next;
662 continue;
663 }
664
665 /* EOF at top level */
666
667 if (cstate_stack_ptr >= 0)
668 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
669 "Unexpected end of configuration file: .endif missing");
670
671 if (len != 0) break; /* EOF after continuation */
672 next_section[0] = 0; /* EOF at start of logical line */
673 return NULL;
674 }
675
676 config_lineno++;
677 newlen = len + Ustrlen(big_buffer + len);
678
679 /* Handle pathologically long physical lines - yes, it did happen - by
680 extending big_buffer at this point. The code also copes with very long
681 logical lines. */
682
683 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
684 {
685 uschar *newbuffer;
686 big_buffer_size += BIG_BUFFER_SIZE;
687 newbuffer = store_malloc(big_buffer_size);
688
689 /* This use of strcpy is OK because we know that the string in the old
690 buffer is shorter than the new buffer. */
691
692 Ustrcpy(newbuffer, big_buffer);
693 store_free(big_buffer);
694 big_buffer = newbuffer;
695 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
696 break;
697 newlen += Ustrlen(big_buffer + newlen);
698 }
699
700 /* Find the true start of the physical line - leading spaces are always
701 ignored. */
702
703 ss = big_buffer + len;
704 while (isspace(*ss)) ss++;
705
706 /* Process the physical line for macros. If this is the start of the logical
707 line, skip over initial text at the start of the line if it starts with an
708 upper case character followed by a sequence of name characters and an equals
709 sign, because that is the definition of a new macro, and we don't do
710 replacement therein. */
711
712 s = ss;
713 if (len == 0 && isupper(*s))
714 {
715 while (isalnum(*s) || *s == '_') s++;
716 while (isspace(*s)) s++;
717 if (*s != '=') s = ss; /* Not a macro definition */
718 }
719
720 /* For each defined macro, scan the line (from after XXX= if present),
721 replacing all occurrences of the macro. */
722
723 macro_found = FALSE;
724 for (m = macros; m != NULL; m = m->next)
725 {
726 uschar *p, *pp;
727 uschar *t = s;
728
729 while ((p = Ustrstr(t, m->name)) != NULL)
730 {
731 int moveby;
732 int namelen = Ustrlen(m->name);
733 int replen = Ustrlen(m->replacement);
734
735 /* Expand the buffer if necessary */
736
737 while (newlen - namelen + replen + 1 > big_buffer_size)
738 {
739 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
740 uschar *newbuffer = store_malloc(newsize);
741 memcpy(newbuffer, big_buffer, newlen + 1);
742 p = newbuffer + (p - big_buffer);
743 s = newbuffer + (s - big_buffer);
744 ss = newbuffer + (ss - big_buffer);
745 t = newbuffer + (t - big_buffer);
746 big_buffer_size = newsize;
747 store_free(big_buffer);
748 big_buffer = newbuffer;
749 }
750
751 /* Shuffle the remaining characters up or down in the buffer before
752 copying in the replacement text. Don't rescan the replacement for this
753 same macro. */
754
755 pp = p + namelen;
756 moveby = replen - namelen;
757 if (moveby != 0)
758 {
759 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
760 newlen += moveby;
761 }
762 Ustrncpy(p, m->replacement, replen);
763 t = p + replen;
764 macro_found = TRUE;
765 }
766 }
767
768 /* An empty macro replacement at the start of a line could mean that ss no
769 longer points to the first non-blank character. */
770
771 while (isspace(*ss)) ss++;
772
773 /* Check for comment lines - these are physical lines. */
774
775 if (*ss == '#') continue;
776
777 /* Handle conditionals, which are also applied to physical lines. Conditions
778 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
779 expansion occured on the rest of the line. A preliminary test for the leading
780 '.' saves effort on most lines. */
781
782 if (*ss == '.')
783 {
784 int i;
785
786 /* Search the list of conditional directives */
787
788 for (i = 0; i < cond_list_size; i++)
789 {
790 int n;
791 cond_item *c = cond_list+i;
792 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
793
794 /* The following character must be white space or end of string */
795
796 n = ss[1 + c->namelen];
797 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
798
799 /* .ifdef and .ifndef push the current state onto the stack, then set
800 a new one from the table. Stack overflow is an error */
801
802 if (c->pushpop > 0)
803 {
804 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
805 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
806 ".%s nested too deeply", c->name);
807 cstate_stack[++cstate_stack_ptr] = cstate;
808 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
809 }
810
811 /* For any of the others, stack underflow is an error. The next state
812 comes either from the stack (.endif) or from the table. */
813
814 else
815 {
816 if (cstate_stack_ptr < 0)
817 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
818 ".%s without matching .ifdef", c->name);
819 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
820 next_cstate[cstate][macro_found? c->action1 : c->action2];
821 }
822
823 /* Having dealt with a directive, break the loop */
824
825 break;
826 }
827
828 /* If we have handled a conditional directive, continue with the next
829 physical line. Otherwise, fall through. */
830
831 if (i < cond_list_size) continue;
832 }
833
834 /* If the conditional state is not 0 (actively using these lines), ignore
835 this input line. */
836
837 if (cstate != 0) continue; /* Conditional skip */
838
839 /* Handle .include lines - these are also physical lines. */
840
841 if (Ustrncmp(ss, ".include", 8) == 0 &&
842 (isspace(ss[8]) ||
843 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
844 {
845 uschar *t;
846 int include_if_exists = isspace(ss[8])? 0 : 10;
847 config_file_item *save;
848 struct stat statbuf;
849
850 ss += 9 + include_if_exists;
851 while (isspace(*ss)) ss++;
852 t = ss + Ustrlen(ss);
853 while (t > ss && isspace(t[-1])) t--;
854 if (*ss == '\"' && t[-1] == '\"')
855 {
856 ss++;
857 t--;
858 }
859 *t = 0;
860
861 if (*ss != '/')
862 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
863 "absolute path \"%s\"", ss);
864
865 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
866
867 save = store_get(sizeof(config_file_item));
868 save->next = config_file_stack;
869 config_file_stack = save;
870 save->file = config_file;
871 save->filename = config_filename;
872 save->lineno = config_lineno;
873
874 config_file = Ufopen(ss, "rb");
875 if (config_file == NULL)
876 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
877 "configuration file %s", ss);
878 config_filename = string_copy(ss);
879 config_lineno = 0;
880 continue;
881 }
882
883 /* If this is the start of the logical line, remember where the non-blank
884 data starts. Otherwise shuffle down continuation lines to remove leading
885 white space. */
886
887 if (len == 0)
888 startoffset = ss - big_buffer;
889 else
890 {
891 s = big_buffer + len;
892 if (ss > s)
893 {
894 memmove(s, ss, (newlen - len) - (ss - s) + 1);
895 newlen -= ss - s;
896 }
897 }
898
899 /* Accept the new addition to the line. Remove trailing white space. */
900
901 len = newlen;
902 while (len > 0 && isspace(big_buffer[len-1])) len--;
903 big_buffer[len] = 0;
904
905 /* We are done if the line does not end in backslash and contains some data.
906 Empty logical lines are ignored. For continuations, remove the backslash and
907 go round the loop to read the continuation line. */
908
909 if (len > 0)
910 {
911 if (big_buffer[len-1] != '\\') break; /* End of logical line */
912 big_buffer[--len] = 0; /* Remove backslash */
913 }
914 } /* Loop for reading multiple physical lines */
915
916 /* We now have a logical line. Test for the end of a configuration section (or,
917 more accurately, for the start of the next section). Place the name of the next
918 section in next_section, and return NULL. If the name given is longer than
919 next_section, truncate it. It will be unrecognized later, because all the known
920 section names do fit. Leave space for pluralizing. */
921
922 s = big_buffer + startoffset; /* First non-space character */
923 if (strncmpic(s, US"begin ", 6) == 0)
924 {
925 s += 6;
926 while (isspace(*s)) s++;
927 if (big_buffer + len - s > sizeof(next_section) - 2)
928 s[sizeof(next_section) - 2] = 0;
929 Ustrcpy(next_section, s);
930 return NULL;
931 }
932
933 /* Return the first non-blank character. */
934
935 return s;
936 }
937
938
939
940 /*************************************************
941 * Read a name *
942 *************************************************/
943
944 /* The yield is the pointer to the next uschar. Names longer than the
945 output space are silently truncated. This function is also used from acl.c when
946 parsing ACLs.
947
948 Arguments:
949 name where to put the name
950 len length of name
951 s input pointer
952
953 Returns: new input pointer
954 */
955
956 uschar *
957 readconf_readname(uschar *name, int len, uschar *s)
958 {
959 int p = 0;
960 while (isspace(*s)) s++;
961 if (isalpha(*s))
962 {
963 while (isalnum(*s) || *s == '_')
964 {
965 if (p < len-1) name[p++] = *s;
966 s++;
967 }
968 }
969 name[p] = 0;
970 while (isspace(*s)) s++;
971 return s;
972 }
973
974
975
976
977 /*************************************************
978 * Read a time value *
979 *************************************************/
980
981 /* This function is also called from outside, to read argument
982 time values. The format of a time value is:
983
984 [<n>w][<n>d][<n>h][<n>m][<n>s]
985
986 as long as at least one is present. If a format error is encountered,
987 return a negative value. The value must be terminated by the given
988 terminator.
989
990 Arguments:
991 s input pointer
992 terminator required terminating character
993 return_msec if TRUE, allow fractional seconds and return milliseconds
994
995 Returns: the time value, or -1 on syntax error
996 value is seconds if return_msec is FALSE
997 value is milliseconds if return_msec is TRUE
998 */
999
1000 int
1001 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
1002 {
1003 int yield = 0;
1004 for (;;)
1005 {
1006 int value, count;
1007 double fraction;
1008
1009 if (!isdigit(*s)) return -1;
1010 (void)sscanf(CS s, "%d%n", &value, &count);
1011 s += count;
1012
1013 switch (*s)
1014 {
1015 case 'w': value *= 7;
1016 case 'd': value *= 24;
1017 case 'h': value *= 60;
1018 case 'm': value *= 60;
1019 case 's': s++;
1020 break;
1021
1022 case '.':
1023 if (!return_msec) return -1;
1024 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1025 s += count;
1026 if (*s++ != 's') return -1;
1027 yield += (int)(fraction * 1000.0);
1028 break;
1029
1030 default: return -1;
1031 }
1032
1033 if (return_msec) value *= 1000;
1034 yield += value;
1035 if (*s == terminator) return yield;
1036 }
1037 /* Control never reaches here. */
1038 }
1039
1040
1041
1042 /*************************************************
1043 * Read a fixed point value *
1044 *************************************************/
1045
1046 /* The value is returned *1000
1047
1048 Arguments:
1049 s input pointer
1050 terminator required terminator
1051
1052 Returns: the value, or -1 on error
1053 */
1054
1055 static int
1056 readconf_readfixed(uschar *s, int terminator)
1057 {
1058 int yield = 0;
1059 int value, count;
1060 if (!isdigit(*s)) return -1;
1061 (void)sscanf(CS s, "%d%n", &value, &count);
1062 s += count;
1063 yield = value * 1000;
1064 if (*s == '.')
1065 {
1066 int m = 100;
1067 while (isdigit((*(++s))))
1068 {
1069 yield += (*s - '0') * m;
1070 m /= 10;
1071 }
1072 }
1073
1074 return (*s == terminator)? yield : (-1);
1075 }
1076
1077
1078
1079 /*************************************************
1080 * Find option in list *
1081 *************************************************/
1082
1083 /* The lists are always in order, so binary chop can be used.
1084
1085 Arguments:
1086 name the option name to search for
1087 ol the first entry in the option list
1088 last one more than the offset of the last entry in the option list
1089
1090 Returns: pointer to an option entry, or NULL if not found
1091 */
1092
1093 static optionlist *
1094 find_option(uschar *name, optionlist *ol, int last)
1095 {
1096 int first = 0;
1097 while (last > first)
1098 {
1099 int middle = (first + last)/2;
1100 int c = Ustrcmp(name, ol[middle].name);
1101 if (c == 0) return ol + middle;
1102 else if (c > 0) first = middle + 1;
1103 else last = middle;
1104 }
1105 return NULL;
1106 }
1107
1108
1109
1110 /*************************************************
1111 * Find a set flag in option list *
1112 *************************************************/
1113
1114 /* Because some versions of Unix make no restrictions on the values of uids and
1115 gids (even negative ones), we cannot represent "unset" by a special value.
1116 There is therefore a separate boolean variable for each one indicating whether
1117 a value is set or not. This function returns a pointer to the boolean, given
1118 the original option name. It is a major disaster if the flag cannot be found.
1119
1120 Arguments:
1121 name the name of the uid or gid option
1122 oltop points to the start of the relevant option list
1123 last one more than the offset of the last item in the option list
1124 data_block NULL when reading main options => data values in the option
1125 list are absolute addresses; otherwise they are byte offsets
1126 in data_block (used for driver options)
1127
1128 Returns: a pointer to the boolean flag.
1129 */
1130
1131 static BOOL *
1132 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1133 {
1134 optionlist *ol;
1135 uschar name2[64];
1136 sprintf(CS name2, "*set_%.50s", name);
1137 ol = find_option(name2, oltop, last);
1138 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1139 "Exim internal error: missing set flag for %s", name);
1140 return (data_block == NULL)? (BOOL *)(ol->value) :
1141 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1142 }
1143
1144
1145
1146
1147 /*************************************************
1148 * Output extra characters message and die *
1149 *************************************************/
1150
1151 /* Called when an option line has junk on the end. Sometimes this is because
1152 the sysadmin thinks comments are permitted.
1153
1154 Arguments:
1155 s points to the extra characters
1156 t1..t3 strings to insert in the log message
1157
1158 Returns: doesn't return; dies
1159 */
1160
1161 static void
1162 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1163 {
1164 uschar *comment = US"";
1165 if (*s == '#') comment = US" (# is comment only at line start)";
1166 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1167 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1168 }
1169
1170
1171
1172 /*************************************************
1173 * Read rewrite information *
1174 *************************************************/
1175
1176 /* Each line of rewrite information contains:
1177
1178 . A complete address in the form user@domain, possibly with
1179 leading * for each part; or alternatively, a regex.
1180
1181 . A replacement string (which will be expanded).
1182
1183 . An optional sequence of one-letter flags, indicating which
1184 headers etc. to apply this rule to.
1185
1186 All this is decoded and placed into a control block. The OR of the flags is
1187 maintained in a common word.
1188
1189 Arguments:
1190 p points to the string that makes up the rule
1191 existflags points to the overall flag word
1192 isglobal TRUE if reading global rewrite rules
1193
1194 Returns: the control block for the parsed rule.
1195 */
1196
1197 static rewrite_rule *
1198 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1199 {
1200 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1201
1202 next->next = NULL;
1203 next->key = string_dequote(&p);
1204
1205 while (isspace(*p)) p++;
1206 if (*p == 0)
1207 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1208 "missing rewrite replacement string");
1209
1210 next->flags = 0;
1211 next->replacement = string_dequote(&p);
1212
1213 while (*p != 0) switch (*p++)
1214 {
1215 case ' ': case '\t': break;
1216
1217 case 'q': next->flags |= rewrite_quit; break;
1218 case 'w': next->flags |= rewrite_whole; break;
1219
1220 case 'h': next->flags |= rewrite_all_headers; break;
1221 case 's': next->flags |= rewrite_sender; break;
1222 case 'f': next->flags |= rewrite_from; break;
1223 case 't': next->flags |= rewrite_to; break;
1224 case 'c': next->flags |= rewrite_cc; break;
1225 case 'b': next->flags |= rewrite_bcc; break;
1226 case 'r': next->flags |= rewrite_replyto; break;
1227
1228 case 'E': next->flags |= rewrite_all_envelope; break;
1229 case 'F': next->flags |= rewrite_envfrom; break;
1230 case 'T': next->flags |= rewrite_envto; break;
1231
1232 case 'Q': next->flags |= rewrite_qualify; break;
1233 case 'R': next->flags |= rewrite_repeat; break;
1234
1235 case 'S':
1236 next->flags |= rewrite_smtp;
1237 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1238 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1239 "rewrite rule has the S flag but is not a regular expression");
1240 break;
1241
1242 default:
1243 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1244 "unknown rewrite flag character '%c' "
1245 "(could be missing quotes round replacement item)", p[-1]);
1246 break;
1247 }
1248
1249 /* If no action flags are set, set all the "normal" rewrites. */
1250
1251 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1252 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1253
1254 /* Remember which exist, for optimization, and return the rule */
1255
1256 *existflags |= next->flags;
1257 return next;
1258 }
1259
1260
1261
1262
1263 /*************************************************
1264 * Read global rewrite information *
1265 *************************************************/
1266
1267 /* Each line is a single rewrite rule; it is parsed into a control block
1268 by readconf_one_rewrite(), and its flags are ORed into the global flag
1269 word rewrite_existflags. */
1270
1271 void
1272 readconf_rewrites(void)
1273 {
1274 rewrite_rule **chain = &global_rewrite_rules;
1275 uschar *p;
1276
1277 while ((p = get_config_line()) != NULL)
1278 {
1279 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1280 *chain = next;
1281 chain = &(next->next);
1282 }
1283 }
1284
1285
1286
1287 /*************************************************
1288 * Read a string *
1289 *************************************************/
1290
1291 /* Strings are read into the normal store pool. As long we aren't too
1292 near the end of the current block, the string will just use what is necessary
1293 on the top of the stacking pool, because string_cat() uses the extension
1294 mechanism.
1295
1296 Argument:
1297 s the rest of the input line
1298 name the option name (for errors)
1299
1300 Returns: pointer to the string
1301 */
1302
1303 static uschar *
1304 read_string(uschar *s, uschar *name)
1305 {
1306 uschar *yield;
1307 uschar *ss;
1308
1309 if (*s != '\"') return string_copy(s);
1310
1311 ss = s;
1312 yield = string_dequote(&s);
1313
1314 if (s == ss+1 || s[-1] != '\"')
1315 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1316 "missing quote at end of string value for %s", name);
1317
1318 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1319
1320 return yield;
1321 }
1322
1323
1324 /*************************************************
1325 * Handle option line *
1326 *************************************************/
1327
1328 /* This function is called from several places to process a line containing the
1329 setting of an option. The first argument is the line to be decoded; it has been
1330 checked not to be empty and not to start with '#'. Trailing newlines and white
1331 space have been removed. The second argument is a pointer to the list of
1332 variable names that are to be recognized, together with their types and
1333 locations, and the third argument gives the number of entries in the list.
1334
1335 The fourth argument is a pointer to a data block. If it is NULL, then the data
1336 values in the options list are absolute addresses. Otherwise, they are byte
1337 offsets in the data block.
1338
1339 String option data may continue onto several lines; this function reads further
1340 data from config_file if necessary.
1341
1342 The yield of this function is normally zero. If a string continues onto
1343 multiple lines, then the data value is permitted to be followed by a comma
1344 or a semicolon (for use in drivers) and the yield is that character.
1345
1346 Arguments:
1347 buffer contains the configuration line to be handled
1348 oltop points to the start of the relevant option list
1349 last one more than the offset of the last item in the option list
1350 data_block NULL when reading main options => data values in the option
1351 list are absolute addresses; otherwise they are byte offsets
1352 in data_block when they have opt_public set; otherwise
1353 they are byte offsets in data_block->options_block.
1354 unknown_txt format string to use in panic message for unknown option;
1355 must contain %s for option name
1356 if given as NULL, don't panic on unknown option
1357
1358 Returns: TRUE if an option was read successfully,
1359 FALSE false for an unknown option if unknown_txt == NULL,
1360 otherwise panic and die on an unknown option
1361 */
1362
1363 static BOOL
1364 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1365 void *data_block, uschar *unknown_txt)
1366 {
1367 int ptr = 0;
1368 int offset = 0;
1369 int n, count, type, value;
1370 int issecure = 0;
1371 uid_t uid;
1372 gid_t gid;
1373 BOOL boolvalue = TRUE;
1374 BOOL freesptr = TRUE;
1375 BOOL extra_condition = FALSE;
1376 optionlist *ol, *ol2;
1377 struct passwd *pw;
1378 void *reset_point;
1379 int intbase = 0;
1380 uschar *inttype = US"";
1381 uschar *sptr;
1382 uschar *s = buffer;
1383 uschar *saved_condition, *strtemp;
1384 uschar **str_target;
1385 uschar name[64];
1386 uschar name2[64];
1387
1388 /* There may be leading spaces; thereafter, we expect an option name starting
1389 with a letter. */
1390
1391 while (isspace(*s)) s++;
1392 if (!isalpha(*s))
1393 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1394
1395 /* Read the name of the option, and skip any subsequent white space. If
1396 it turns out that what we read was "hide", set the flag indicating that
1397 this is a secure option, and loop to read the next word. */
1398
1399 for (n = 0; n < 2; n++)
1400 {
1401 while (isalnum(*s) || *s == '_')
1402 {
1403 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1404 s++;
1405 }
1406 name[ptr] = 0;
1407 while (isspace(*s)) s++;
1408 if (Ustrcmp(name, "hide") != 0) break;
1409 issecure = opt_secure;
1410 ptr = 0;
1411 }
1412
1413 /* Deal with "no_" or "not_" here for booleans */
1414
1415 if (Ustrncmp(name, "no_", 3) == 0)
1416 {
1417 boolvalue = FALSE;
1418 offset = 3;
1419 }
1420
1421 if (Ustrncmp(name, "not_", 4) == 0)
1422 {
1423 boolvalue = FALSE;
1424 offset = 4;
1425 }
1426
1427 /* Search the list for the given name. A non-existent name, or an option that
1428 is set twice, is a disaster. */
1429
1430 ol = find_option(name + offset, oltop, last);
1431
1432 if (ol == NULL)
1433 {
1434 if (unknown_txt == NULL) return FALSE;
1435 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1436 }
1437
1438 if ((ol->type & opt_set) != 0)
1439 {
1440 uschar *mname = name;
1441 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1442 if (Ustrcmp(mname, "condition") == 0)
1443 extra_condition = TRUE;
1444 else
1445 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1446 "\"%s\" option set for the second time", mname);
1447 }
1448
1449 ol->type |= opt_set | issecure;
1450 type = ol->type & opt_mask;
1451
1452 /* Types with data values must be followed by '='; the "no[t]_" prefix
1453 applies only to boolean values. */
1454
1455 if (type < opt_bool || type > opt_bool_last)
1456 {
1457 if (offset != 0)
1458 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1459 "negation prefix applied to a non-boolean option");
1460 if (*s == 0)
1461 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1462 "unexpected end of line (data missing) after %s", name);
1463 if (*s != '=')
1464 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1465 }
1466
1467 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1468 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1469 ultimately expands to one of those values. */
1470
1471 else if (*s != 0 && (offset != 0 || *s != '='))
1472 extra_chars_error(s, US"boolean option ", name, US"");
1473
1474 /* Skip white space after = */
1475
1476 if (*s == '=') while (isspace((*(++s))));
1477
1478 /* If there is a data block and the opt_public flag is not set, change
1479 the data block pointer to the private options block. */
1480
1481 if (data_block != NULL && (ol->type & opt_public) == 0)
1482 data_block = (void *)(((driver_instance *)data_block)->options_block);
1483
1484 /* Now get the data according to the type. */
1485
1486 switch (type)
1487 {
1488 /* If a string value is not enclosed in quotes, it consists of
1489 the rest of the current line, verbatim. Otherwise, string escapes
1490 are processed.
1491
1492 A transport is specified as a string, which is then looked up in the
1493 list of transports. A search type is specified as one of a number of
1494 known strings.
1495
1496 A set or rewrite rules for a driver is specified as a string, which is
1497 then parsed into a suitable chain of control blocks.
1498
1499 Uids and gids are specified as strings which are then looked up in the
1500 passwd file. Lists of uids and gids are similarly specified as colon-
1501 separated strings. */
1502
1503 case opt_stringptr:
1504 case opt_uid:
1505 case opt_gid:
1506 case opt_expand_uid:
1507 case opt_expand_gid:
1508 case opt_uidlist:
1509 case opt_gidlist:
1510 case opt_rewrite:
1511
1512 reset_point = sptr = read_string(s, name);
1513
1514 /* Having read a string, we now have several different ways of using it,
1515 depending on the data type, so do another switch. If keeping the actual
1516 string is not required (because it is interpreted), freesptr is set TRUE,
1517 and at the end we reset the pool. */
1518
1519 switch (type)
1520 {
1521 /* If this was a string, set the variable to point to the new string,
1522 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1523 rules, we still keep the string (for printing), and parse the rules into a
1524 control block and flags word. */
1525
1526 case opt_stringptr:
1527 if (data_block == NULL)
1528 str_target = (uschar **)(ol->value);
1529 else
1530 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1531 if (extra_condition)
1532 {
1533 /* We already have a condition, we're conducting a crude hack to let
1534 multiple condition rules be chained together, despite storing them in
1535 text form. */
1536 saved_condition = *str_target;
1537 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1538 saved_condition, sptr);
1539 *str_target = string_copy_malloc(strtemp);
1540 /* TODO(pdp): there is a memory leak here when we set 3 or more
1541 conditions; I still don't understand the store mechanism enough
1542 to know what's the safe way to free content from an earlier store.
1543 AFAICT, stores stack, so freeing an early stored item also stores
1544 all data alloc'd after it. If we knew conditions were adjacent,
1545 we could survive that, but we don't. So I *think* we need to take
1546 another bit from opt_type to indicate "malloced"; this seems like
1547 quite a hack, especially for this one case. It also means that
1548 we can't ever reclaim the store from the *first* condition.
1549
1550 Because we only do this once, near process start-up, I'm prepared to
1551 let this slide for the time being, even though it rankles. */
1552 }
1553 else
1554 {
1555 *str_target = sptr;
1556 freesptr = FALSE;
1557 }
1558 break;
1559
1560 case opt_rewrite:
1561 if (data_block == NULL)
1562 *((uschar **)(ol->value)) = sptr;
1563 else
1564 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1565 freesptr = FALSE;
1566 if (type == opt_rewrite)
1567 {
1568 int sep = 0;
1569 int *flagptr;
1570 uschar *p = sptr;
1571 rewrite_rule **chain;
1572 optionlist *ol3;
1573
1574 sprintf(CS name2, "*%.50s_rules", name);
1575 ol2 = find_option(name2, oltop, last);
1576 sprintf(CS name2, "*%.50s_flags", name);
1577 ol3 = find_option(name2, oltop, last);
1578
1579 if (ol2 == NULL || ol3 == NULL)
1580 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1581 "rewrite rules not available for driver");
1582
1583 if (data_block == NULL)
1584 {
1585 chain = (rewrite_rule **)(ol2->value);
1586 flagptr = (int *)(ol3->value);
1587 }
1588 else
1589 {
1590 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1591 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1592 }
1593
1594 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1595 != NULL)
1596 {
1597 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1598 *chain = next;
1599 chain = &(next->next);
1600 }
1601
1602 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1603 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1604 "non-header rewrite - not allowed at transport time -");
1605 }
1606 break;
1607
1608 /* If it was an expanded uid, see if there is any expansion to be
1609 done by checking for the presence of a $ character. If there is, save it
1610 in the corresponding *expand_user option field. Otherwise, fall through
1611 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1612 of data. */
1613
1614 case opt_expand_uid:
1615 sprintf(CS name2, "*expand_%.50s", name);
1616 ol2 = find_option(name2, oltop, last);
1617 if (ol2 != NULL)
1618 {
1619 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1620
1621 if (data_block == NULL)
1622 *((uschar **)(ol2->value)) = ss;
1623 else
1624 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1625
1626 if (ss != NULL)
1627 {
1628 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1629 freesptr = FALSE;
1630 break;
1631 }
1632 }
1633
1634 /* Look up a fixed uid, and also make use of the corresponding gid
1635 if a passwd entry is returned and the gid has not been set. */
1636
1637 case opt_uid:
1638 if (!route_finduser(sptr, &pw, &uid))
1639 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1640 if (data_block == NULL)
1641 *((uid_t *)(ol->value)) = uid;
1642 else
1643 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1644
1645 /* Set the flag indicating a fixed value is set */
1646
1647 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1648
1649 /* Handle matching gid if we have a passwd entry: done by finding the
1650 same name with terminating "user" changed to "group"; if not found,
1651 ignore. Also ignore if the value is already set. */
1652
1653 if (pw == NULL) break;
1654 Ustrcpy(name+Ustrlen(name)-4, "group");
1655 ol2 = find_option(name, oltop, last);
1656 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1657 (ol2->type & opt_mask) == opt_expand_gid))
1658 {
1659 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1660 if (! *set_flag)
1661 {
1662 if (data_block == NULL)
1663 *((gid_t *)(ol2->value)) = pw->pw_gid;
1664 else
1665 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1666 *set_flag = TRUE;
1667 }
1668 }
1669 break;
1670
1671 /* If it was an expanded gid, see if there is any expansion to be
1672 done by checking for the presence of a $ character. If there is, save it
1673 in the corresponding *expand_user option field. Otherwise, fall through
1674 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1675 of data. */
1676
1677 case opt_expand_gid:
1678 sprintf(CS name2, "*expand_%.50s", name);
1679 ol2 = find_option(name2, oltop, last);
1680 if (ol2 != NULL)
1681 {
1682 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1683
1684 if (data_block == NULL)
1685 *((uschar **)(ol2->value)) = ss;
1686 else
1687 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1688
1689 if (ss != NULL)
1690 {
1691 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1692 freesptr = FALSE;
1693 break;
1694 }
1695 }
1696
1697 /* Handle freestanding gid */
1698
1699 case opt_gid:
1700 if (!route_findgroup(sptr, &gid))
1701 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1702 if (data_block == NULL)
1703 *((gid_t *)(ol->value)) = gid;
1704 else
1705 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1706 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1707 break;
1708
1709 /* If it was a uid list, look up each individual entry, and build
1710 a vector of uids, with a count in the first element. Put the vector
1711 in malloc store so we can free the string. (We are reading into
1712 permanent store already.) */
1713
1714 case opt_uidlist:
1715 {
1716 int count = 1;
1717 uid_t *list;
1718 int ptr = 0;
1719 uschar *p;
1720 uschar *op = expand_string (sptr);
1721
1722 if (op == NULL)
1723 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1724 name, expand_string_message);
1725
1726 p = op;
1727 if (*p != 0) count++;
1728 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1729 list = store_malloc(count*sizeof(uid_t));
1730 list[ptr++] = (uid_t)(count - 1);
1731
1732 if (data_block == NULL)
1733 *((uid_t **)(ol->value)) = list;
1734 else
1735 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1736
1737 p = op;
1738 while (count-- > 1)
1739 {
1740 int sep = 0;
1741 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1742 if (!route_finduser(big_buffer, NULL, &uid))
1743 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1744 big_buffer);
1745 list[ptr++] = uid;
1746 }
1747 }
1748 break;
1749
1750 /* If it was a gid list, look up each individual entry, and build
1751 a vector of gids, with a count in the first element. Put the vector
1752 in malloc store so we can free the string. (We are reading into permanent
1753 store already.) */
1754
1755 case opt_gidlist:
1756 {
1757 int count = 1;
1758 gid_t *list;
1759 int ptr = 0;
1760 uschar *p;
1761 uschar *op = expand_string (sptr);
1762
1763 if (op == NULL)
1764 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1765 name, expand_string_message);
1766
1767 p = op;
1768 if (*p != 0) count++;
1769 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1770 list = store_malloc(count*sizeof(gid_t));
1771 list[ptr++] = (gid_t)(count - 1);
1772
1773 if (data_block == NULL)
1774 *((gid_t **)(ol->value)) = list;
1775 else
1776 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1777
1778 p = op;
1779 while (count-- > 1)
1780 {
1781 int sep = 0;
1782 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1783 if (!route_findgroup(big_buffer, &gid))
1784 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1785 big_buffer);
1786 list[ptr++] = gid;
1787 }
1788 }
1789 break;
1790 }
1791
1792 /* Release store if the value of the string doesn't need to be kept. */
1793
1794 if (freesptr) store_reset(reset_point);
1795 break;
1796
1797 /* Expanded boolean: if no characters follow, or if there are no dollar
1798 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1799 save the string for later expansion in the alternate place. */
1800
1801 case opt_expand_bool:
1802 if (*s != 0 && Ustrchr(s, '$') != 0)
1803 {
1804 sprintf(CS name2, "*expand_%.50s", name);
1805 ol2 = find_option(name2, oltop, last);
1806 if (ol2 != NULL)
1807 {
1808 reset_point = sptr = read_string(s, name);
1809 if (data_block == NULL)
1810 *((uschar **)(ol2->value)) = sptr;
1811 else
1812 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1813 freesptr = FALSE;
1814 break;
1815 }
1816 }
1817 /* Fall through */
1818
1819 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1820 look for yes/not/true/false. Some booleans are stored in a single bit in
1821 a single int. There's a special fudge for verify settings; without a suffix
1822 they set both xx_sender and xx_recipient. The table points to the sender
1823 value; search subsequently for the recipient. There's another special case:
1824 opt_bool_set also notes when a boolean has been set. */
1825
1826 case opt_bool:
1827 case opt_bit:
1828 case opt_bool_verify:
1829 case opt_bool_set:
1830 if (*s != 0)
1831 {
1832 s = readconf_readname(name2, 64, s);
1833 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1834 boolvalue = TRUE;
1835 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1836 boolvalue = FALSE;
1837 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1838 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1839 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1840 US"for boolean option ", name);
1841 }
1842
1843 /* Handle single-bit type. */
1844
1845 if (type == opt_bit)
1846 {
1847 int bit = 1 << ((ol->type >> 16) & 31);
1848 int *ptr = (data_block == NULL)?
1849 (int *)(ol->value) :
1850 (int *)((uschar *)data_block + (long int)ol->value);
1851 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1852 break;
1853 }
1854
1855 /* Handle full BOOL types */
1856
1857 if (data_block == NULL)
1858 *((BOOL *)(ol->value)) = boolvalue;
1859 else
1860 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1861
1862 /* Verify fudge */
1863
1864 if (type == opt_bool_verify)
1865 {
1866 sprintf(CS name2, "%.50s_recipient", name + offset);
1867 ol2 = find_option(name2, oltop, last);
1868 if (ol2 != NULL)
1869 {
1870 if (data_block == NULL)
1871 *((BOOL *)(ol2->value)) = boolvalue;
1872 else
1873 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1874 }
1875 }
1876
1877 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1878
1879 else if (type == opt_bool_set)
1880 {
1881 sprintf(CS name2, "*set_%.50s", name + offset);
1882 ol2 = find_option(name2, oltop, last);
1883 if (ol2 != NULL)
1884 {
1885 if (data_block == NULL)
1886 *((BOOL *)(ol2->value)) = TRUE;
1887 else
1888 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1889 }
1890 }
1891 break;
1892
1893 /* Octal integer */
1894
1895 case opt_octint:
1896 intbase = 8;
1897 inttype = US"octal ";
1898
1899 /* Integer: a simple(ish) case; allow octal and hex formats, and
1900 suffixes K and M. The different types affect output, not input. */
1901
1902 case opt_mkint:
1903 case opt_int:
1904 {
1905 uschar *endptr;
1906 long int lvalue;
1907
1908 errno = 0;
1909 lvalue = strtol(CS s, CSS &endptr, intbase);
1910
1911 if (endptr == s)
1912 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1913 inttype, name);
1914
1915 if (errno != ERANGE)
1916 {
1917 if (tolower(*endptr) == 'k')
1918 {
1919 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1920 else lvalue *= 1024;
1921 endptr++;
1922 }
1923 else if (tolower(*endptr) == 'm')
1924 {
1925 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1926 errno = ERANGE;
1927 else lvalue *= 1024*1024;
1928 endptr++;
1929 }
1930 }
1931
1932 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1933 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1934 "absolute value of integer \"%s\" is too large (overflow)", s);
1935
1936 while (isspace(*endptr)) endptr++;
1937 if (*endptr != 0)
1938 extra_chars_error(endptr, inttype, US"integer value for ", name);
1939
1940 value = (int)lvalue;
1941 }
1942
1943 if (data_block == NULL)
1944 *((int *)(ol->value)) = value;
1945 else
1946 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1947 break;
1948
1949 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1950 M. */
1951
1952 case opt_Kint:
1953 {
1954 uschar *endptr;
1955 errno = 0;
1956 value = strtol(CS s, CSS &endptr, intbase);
1957
1958 if (endptr == s)
1959 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1960 inttype, name);
1961
1962 if (errno != ERANGE)
1963 {
1964 if (tolower(*endptr) == 'm')
1965 {
1966 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1967 else value *= 1024;
1968 endptr++;
1969 }
1970 else if (tolower(*endptr) == 'k')
1971 {
1972 endptr++;
1973 }
1974 else
1975 {
1976 value = (value + 512)/1024;
1977 }
1978 }
1979
1980 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1981 "absolute value of integer \"%s\" is too large (overflow)", s);
1982
1983 while (isspace(*endptr)) endptr++;
1984 if (*endptr != 0)
1985 extra_chars_error(endptr, inttype, US"integer value for ", name);
1986 }
1987
1988 if (data_block == NULL)
1989 *((int *)(ol->value)) = value;
1990 else
1991 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1992 break;
1993
1994 /* Fixed-point number: held to 3 decimal places. */
1995
1996 case opt_fixed:
1997 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1998 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1999 "fixed-point number expected for %s", name);
2000
2001 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2002 "integer \"%s\" is too large (overflow)", s);
2003
2004 value *= 1000;
2005
2006 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2007 "integer \"%s\" is too large (overflow)", s);
2008
2009 if (s[count] == '.')
2010 {
2011 int d = 100;
2012 while (isdigit(s[++count]))
2013 {
2014 value += (s[count] - '0') * d;
2015 d /= 10;
2016 }
2017 }
2018
2019 while (isspace(s[count])) count++;
2020
2021 if (s[count] != 0)
2022 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2023
2024 if (data_block == NULL)
2025 *((int *)(ol->value)) = value;
2026 else
2027 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2028 break;
2029
2030 /* There's a special routine to read time values. */
2031
2032 case opt_time:
2033 value = readconf_readtime(s, 0, FALSE);
2034 if (value < 0)
2035 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2036 name);
2037 if (data_block == NULL)
2038 *((int *)(ol->value)) = value;
2039 else
2040 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2041 break;
2042
2043 /* A time list is a list of colon-separated times, with the first
2044 element holding the size of the list and the second the number of
2045 entries used. */
2046
2047 case opt_timelist:
2048 {
2049 int count = 0;
2050 int *list = (data_block == NULL)?
2051 (int *)(ol->value) :
2052 (int *)((uschar *)data_block + (long int)(ol->value));
2053
2054 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2055 {
2056 int terminator = 0;
2057 uschar *snext = Ustrchr(s, ':');
2058 if (snext != NULL)
2059 {
2060 uschar *ss = snext;
2061 while (ss > s && isspace(ss[-1])) ss--;
2062 terminator = *ss;
2063 }
2064 value = readconf_readtime(s, terminator, FALSE);
2065 if (value < 0)
2066 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2067 name);
2068 if (count > 1 && value <= list[count])
2069 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2070 "time value out of order for %s", name);
2071 list[count+1] = value;
2072 if (snext == NULL) break;
2073 s = snext + 1;
2074 while (isspace(*s)) s++;
2075 }
2076
2077 if (count > list[0] - 2)
2078 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2079 name);
2080 if (count > 0 && list[2] == 0) count = 0;
2081 list[1] = count;
2082 }
2083
2084 break;
2085 }
2086
2087 return TRUE;
2088 }
2089
2090
2091
2092 /*************************************************
2093 * Print a time value *
2094 *************************************************/
2095
2096 /*
2097 Argument: a time value in seconds
2098 Returns: pointer to a fixed buffer containing the time as a string,
2099 in readconf_readtime() format
2100 */
2101
2102 uschar *
2103 readconf_printtime(int t)
2104 {
2105 int s, m, h, d, w;
2106 uschar *p = time_buffer;
2107
2108 if (t < 0)
2109 {
2110 *p++ = '-';
2111 t = -t;
2112 }
2113
2114 s = t % 60;
2115 t /= 60;
2116 m = t % 60;
2117 t /= 60;
2118 h = t % 24;
2119 t /= 24;
2120 d = t % 7;
2121 w = t/7;
2122
2123 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2124 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2125 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2126 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2127 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2128
2129 return time_buffer;
2130 }
2131
2132
2133
2134 /*************************************************
2135 * Print an individual option value *
2136 *************************************************/
2137
2138 /* This is used by the -bP option, so prints to the standard output.
2139 The entire options list is passed in as an argument, because some options come
2140 in pairs - typically uid/gid settings, which can either be explicit numerical
2141 values, or strings to be expanded later. If the numerical value is unset,
2142 search for "*expand_<name>" to see if there is a string equivalent.
2143
2144 Arguments:
2145 ol option entry, or NULL for an unknown option
2146 name option name
2147 options_block NULL for main configuration options; otherwise points to
2148 a driver block; if the option doesn't have opt_public
2149 set, then options_block->options_block is where the item
2150 resides.
2151 oltop points to the option list in which ol exists
2152 last one more than the offset of the last entry in optop
2153
2154 Returns: nothing
2155 */
2156
2157 static void
2158 print_ol(optionlist *ol, uschar *name, void *options_block,
2159 optionlist *oltop, int last)
2160 {
2161 struct passwd *pw;
2162 struct group *gr;
2163 optionlist *ol2;
2164 void *value;
2165 uid_t *uidlist;
2166 gid_t *gidlist;
2167 uschar *s;
2168 uschar name2[64];
2169
2170 if (ol == NULL)
2171 {
2172 printf("%s is not a known option\n", name);
2173 return;
2174 }
2175
2176 /* Non-admin callers cannot see options that have been flagged secure by the
2177 "hide" prefix. */
2178
2179 if (!admin_user && (ol->type & opt_secure) != 0)
2180 {
2181 printf("%s = <value not displayable>\n", name);
2182 return;
2183 }
2184
2185 /* Else show the value of the option */
2186
2187 value = ol->value;
2188 if (options_block != NULL)
2189 {
2190 if ((ol->type & opt_public) == 0)
2191 options_block = (void *)(((driver_instance *)options_block)->options_block);
2192 value = (void *)((uschar *)options_block + (long int)value);
2193 }
2194
2195 switch(ol->type & opt_mask)
2196 {
2197 case opt_stringptr:
2198 case opt_rewrite: /* Show the text value */
2199 s = *((uschar **)value);
2200 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2201 break;
2202
2203 case opt_int:
2204 printf("%s = %d\n", name, *((int *)value));
2205 break;
2206
2207 case opt_mkint:
2208 {
2209 int x = *((int *)value);
2210 if (x != 0 && (x & 1023) == 0)
2211 {
2212 int c = 'K';
2213 x >>= 10;
2214 if ((x & 1023) == 0)
2215 {
2216 c = 'M';
2217 x >>= 10;
2218 }
2219 printf("%s = %d%c\n", name, x, c);
2220 }
2221 else printf("%s = %d\n", name, x);
2222 }
2223 break;
2224
2225 case opt_Kint:
2226 {
2227 int x = *((int *)value);
2228 if (x == 0) printf("%s = 0\n", name);
2229 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2230 else printf("%s = %dK\n", name, x);
2231 }
2232 break;
2233
2234 case opt_octint:
2235 printf("%s = %#o\n", name, *((int *)value));
2236 break;
2237
2238 /* Can be negative only when "unset", in which case integer */
2239
2240 case opt_fixed:
2241 {
2242 int x = *((int *)value);
2243 int f = x % 1000;
2244 int d = 100;
2245 if (x < 0) printf("%s =\n", name); else
2246 {
2247 printf("%s = %d.", name, x/1000);
2248 do
2249 {
2250 printf("%d", f/d);
2251 f %= d;
2252 d /= 10;
2253 }
2254 while (f != 0);
2255 printf("\n");
2256 }
2257 }
2258 break;
2259
2260 /* If the numerical value is unset, try for the string value */
2261
2262 case opt_expand_uid:
2263 if (! *get_set_flag(name, oltop, last, options_block))
2264 {
2265 sprintf(CS name2, "*expand_%.50s", name);
2266 ol2 = find_option(name2, oltop, last);
2267 if (ol2 != NULL)
2268 {
2269 void *value2 = ol2->value;
2270 if (options_block != NULL)
2271 value2 = (void *)((uschar *)options_block + (long int)value2);
2272 s = *((uschar **)value2);
2273 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2274 break;
2275 }
2276 }
2277
2278 /* Else fall through */
2279
2280 case opt_uid:
2281 if (! *get_set_flag(name, oltop, last, options_block))
2282 printf("%s =\n", name);
2283 else
2284 {
2285 pw = getpwuid(*((uid_t *)value));
2286 if (pw == NULL)
2287 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2288 else printf("%s = %s\n", name, pw->pw_name);
2289 }
2290 break;
2291
2292 /* If the numerical value is unset, try for the string value */
2293
2294 case opt_expand_gid:
2295 if (! *get_set_flag(name, oltop, last, options_block))
2296 {
2297 sprintf(CS name2, "*expand_%.50s", name);
2298 ol2 = find_option(name2, oltop, last);
2299 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2300 {
2301 void *value2 = ol2->value;
2302 if (options_block != NULL)
2303 value2 = (void *)((uschar *)options_block + (long int)value2);
2304 s = *((uschar **)value2);
2305 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2306 break;
2307 }
2308 }
2309
2310 /* Else fall through */
2311
2312 case opt_gid:
2313 if (! *get_set_flag(name, oltop, last, options_block))
2314 printf("%s =\n", name);
2315 else
2316 {
2317 gr = getgrgid(*((int *)value));
2318 if (gr == NULL)
2319 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2320 else printf("%s = %s\n", name, gr->gr_name);
2321 }
2322 break;
2323
2324 case opt_uidlist:
2325 uidlist = *((uid_t **)value);
2326 printf("%s =", name);
2327 if (uidlist != NULL)
2328 {
2329 int i;
2330 uschar sep = ' ';
2331 for (i = 1; i <= (int)(uidlist[0]); i++)
2332 {
2333 uschar *name = NULL;
2334 pw = getpwuid(uidlist[i]);
2335 if (pw != NULL) name = US pw->pw_name;
2336 if (name != NULL) printf("%c%s", sep, name);
2337 else printf("%c%ld", sep, (long int)(uidlist[i]));
2338 sep = ':';
2339 }
2340 }
2341 printf("\n");
2342 break;
2343
2344 case opt_gidlist:
2345 gidlist = *((gid_t **)value);
2346 printf("%s =", name);
2347 if (gidlist != NULL)
2348 {
2349 int i;
2350 uschar sep = ' ';
2351 for (i = 1; i <= (int)(gidlist[0]); i++)
2352 {
2353 uschar *name = NULL;
2354 gr = getgrgid(gidlist[i]);
2355 if (gr != NULL) name = US gr->gr_name;
2356 if (name != NULL) printf("%c%s", sep, name);
2357 else printf("%c%ld", sep, (long int)(gidlist[i]));
2358 sep = ':';
2359 }
2360 }
2361 printf("\n");
2362 break;
2363
2364 case opt_time:
2365 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2366 break;
2367
2368 case opt_timelist:
2369 {
2370 int i;
2371 int *list = (int *)value;
2372 printf("%s = ", name);
2373 for (i = 0; i < list[1]; i++)
2374 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2375 printf("\n");
2376 }
2377 break;
2378
2379 case opt_bit:
2380 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2381 "" : "no_", name);
2382 break;
2383
2384 case opt_expand_bool:
2385 sprintf(CS name2, "*expand_%.50s", name);
2386 ol2 = find_option(name2, oltop, last);
2387 if (ol2 != NULL && ol2->value != NULL)
2388 {
2389 void *value2 = ol2->value;
2390 if (options_block != NULL)
2391 value2 = (void *)((uschar *)options_block + (long int)value2);
2392 s = *((uschar **)value2);
2393 if (s != NULL)
2394 {
2395 printf("%s = %s\n", name, string_printing(s));
2396 break;
2397 }
2398 /* s == NULL => string not set; fall through */
2399 }
2400
2401 /* Fall through */
2402
2403 case opt_bool:
2404 case opt_bool_verify:
2405 case opt_bool_set:
2406 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2407 break;
2408 }
2409 }
2410
2411
2412
2413 /*************************************************
2414 * Print value from main configuration *
2415 *************************************************/
2416
2417 /* This function, called as a result of encountering the -bP option,
2418 causes the value of any main configuration variable to be output if the
2419 second argument is NULL. There are some special values:
2420
2421 all print all main configuration options
2422 configure_file print the name of the configuration file
2423 routers print the routers' configurations
2424 transports print the transports' configuration
2425 authenticators print the authenticators' configuration
2426 macros print the macros' configuration
2427 router_list print a list of router names
2428 transport_list print a list of transport names
2429 authenticator_list print a list of authentication mechanism names
2430 macro_list print a list of macro names
2431 +name print a named list item
2432 local_scan print the local_scan options
2433
2434 If the second argument is not NULL, it must be one of "router", "transport",
2435 "authenticator" or "macro" in which case the first argument identifies the
2436 driver whose options are to be printed.
2437
2438 Arguments:
2439 name option name if type == NULL; else driver name
2440 type NULL or driver type name, as described above
2441
2442 Returns: nothing
2443 */
2444
2445 void
2446 readconf_print(uschar *name, uschar *type)
2447 {
2448 BOOL names_only = FALSE;
2449 optionlist *ol;
2450 optionlist *ol2 = NULL;
2451 driver_instance *d = NULL;
2452 macro_item *m;
2453 int size = 0;
2454
2455 if (type == NULL)
2456 {
2457 if (*name == '+')
2458 {
2459 int i;
2460 tree_node *t;
2461 BOOL found = FALSE;
2462 static uschar *types[] = { US"address", US"domain", US"host",
2463 US"localpart" };
2464 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2465 &hostlist_anchor, &localpartlist_anchor };
2466
2467 for (i = 0; i < 4; i++)
2468 {
2469 t = tree_search(*(anchors[i]), name+1);
2470 if (t != NULL)
2471 {
2472 found = TRUE;
2473 printf("%slist %s = %s\n", types[i], name+1,
2474 ((namedlist_block *)(t->data.ptr))->string);
2475 }
2476 }
2477
2478 if (!found)
2479 printf("no address, domain, host, or local part list called \"%s\" "
2480 "exists\n", name+1);
2481
2482 return;
2483 }
2484
2485 if (Ustrcmp(name, "configure_file") == 0)
2486 {
2487 printf("%s\n", CS config_main_filename);
2488 return;
2489 }
2490
2491 if (Ustrcmp(name, "all") == 0)
2492 {
2493 for (ol = optionlist_config;
2494 ol < optionlist_config + optionlist_config_size; ol++)
2495 {
2496 if ((ol->type & opt_hidden) == 0)
2497 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2498 }
2499 return;
2500 }
2501
2502 if (Ustrcmp(name, "local_scan") == 0)
2503 {
2504 #ifndef LOCAL_SCAN_HAS_OPTIONS
2505 printf("local_scan() options are not supported\n");
2506 #else
2507 for (ol = local_scan_options;
2508 ol < local_scan_options + local_scan_options_count; ol++)
2509 {
2510 print_ol(ol, US ol->name, NULL, local_scan_options,
2511 local_scan_options_count);
2512 }
2513 #endif
2514 return;
2515 }
2516
2517 if (Ustrcmp(name, "routers") == 0)
2518 {
2519 type = US"router";
2520 name = NULL;
2521 }
2522 else if (Ustrcmp(name, "transports") == 0)
2523 {
2524 type = US"transport";
2525 name = NULL;
2526 }
2527
2528 else if (Ustrcmp(name, "authenticators") == 0)
2529 {
2530 type = US"authenticator";
2531 name = NULL;
2532 }
2533
2534 else if (Ustrcmp(name, "macros") == 0)
2535 {
2536 type = US"macro";
2537 name = NULL;
2538 }
2539
2540 else if (Ustrcmp(name, "router_list") == 0)
2541 {
2542 type = US"router";
2543 name = NULL;
2544 names_only = TRUE;
2545 }
2546
2547 else if (Ustrcmp(name, "transport_list") == 0)
2548 {
2549 type = US"transport";
2550 name = NULL;
2551 names_only = TRUE;
2552 }
2553
2554 else if (Ustrcmp(name, "authenticator_list") == 0)
2555 {
2556 type = US"authenticator";
2557 name = NULL;
2558 names_only = TRUE;
2559 }
2560
2561 else if (Ustrcmp(name, "macro_list") == 0)
2562 {
2563 type = US"macro";
2564 name = NULL;
2565 names_only = TRUE;
2566 }
2567
2568 else
2569 {
2570 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2571 name, NULL, optionlist_config, optionlist_config_size);
2572 return;
2573 }
2574 }
2575
2576 /* Handle the options for a router or transport. Skip options that are flagged
2577 as hidden. Some of these are options with names starting with '*', used for
2578 internal alternative representations of other options (which the printing
2579 function will sort out). Others are synonyms kept for backward compatibility.
2580 */
2581
2582 if (Ustrcmp(type, "router") == 0)
2583 {
2584 d = (driver_instance *)routers;
2585 ol2 = optionlist_routers;
2586 size = optionlist_routers_size;
2587 }
2588 else if (Ustrcmp(type, "transport") == 0)
2589 {
2590 d = (driver_instance *)transports;
2591 ol2 = optionlist_transports;
2592 size = optionlist_transports_size;
2593 }
2594 else if (Ustrcmp(type, "authenticator") == 0)
2595 {
2596 d = (driver_instance *)auths;
2597 ol2 = optionlist_auths;
2598 size = optionlist_auths_size;
2599 }
2600
2601 else if (Ustrcmp(type, "macro") == 0)
2602 {
2603 /* People store passwords in macros and they were previously not available
2604 for printing. So we have an admin_users restriction. */
2605 if (!admin_user)
2606 {
2607 fprintf(stderr, "exim: permission denied\n");
2608 exit(EXIT_FAILURE);
2609 }
2610 for (m = macros; m != NULL; m = m->next)
2611 {
2612 if (name == NULL || Ustrcmp(name, m->name) == 0)
2613 {
2614 if (names_only)
2615 printf("%s\n", CS m->name);
2616 else
2617 printf("%s=%s\n", CS m->name, CS m->replacement);
2618 if (name != NULL)
2619 return;
2620 }
2621 }
2622 if (name != NULL)
2623 printf("%s %s not found\n", type, name);
2624 return;
2625 }
2626
2627 if (names_only)
2628 {
2629 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2630 return;
2631 }
2632
2633 /* Either search for a given driver, or print all of them */
2634
2635 for (; d != NULL; d = d->next)
2636 {
2637 if (name == NULL)
2638 printf("\n%s %s:\n", d->name, type);
2639 else if (Ustrcmp(d->name, name) != 0) continue;
2640
2641 for (ol = ol2; ol < ol2 + size; ol++)
2642 {
2643 if ((ol->type & opt_hidden) == 0)
2644 print_ol(ol, US ol->name, d, ol2, size);
2645 }
2646
2647 for (ol = d->info->options;
2648 ol < d->info->options + *(d->info->options_count); ol++)
2649 {
2650 if ((ol->type & opt_hidden) == 0)
2651 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2652 }
2653 if (name != NULL) return;
2654 }
2655 if (name != NULL) printf("%s %s not found\n", type, name);
2656 }
2657
2658
2659
2660 /*************************************************
2661 * Read a named list item *
2662 *************************************************/
2663
2664 /* This function reads a name and a list (i.e. string). The name is used to
2665 save the list in a tree, sorted by its name. Each entry also has a number,
2666 which can be used for caching tests, but if the string contains any expansion
2667 items other than $key, the number is set negative to inhibit caching. This
2668 mechanism is used for domain, host, and address lists that are referenced by
2669 the "+name" syntax.
2670
2671 Arguments:
2672 anchorp points to the tree anchor
2673 numberp points to the current number for this tree
2674 max the maximum number permitted
2675 s the text of the option line, starting immediately after the name
2676 of the list type
2677 tname the name of the list type, for messages
2678
2679 Returns: nothing
2680 */
2681
2682 static void
2683 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2684 uschar *tname)
2685 {
2686 BOOL forcecache = FALSE;
2687 uschar *ss;
2688 tree_node *t;
2689 namedlist_block *nb = store_get(sizeof(namedlist_block));
2690
2691 if (Ustrncmp(s, "_cache", 6) == 0)
2692 {
2693 forcecache = TRUE;
2694 s += 6;
2695 }
2696
2697 if (!isspace(*s))
2698 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2699
2700 if (*numberp >= max)
2701 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2702 tname, max);
2703
2704 while (isspace(*s)) s++;
2705 ss = s;
2706 while (isalnum(*s) || *s == '_') s++;
2707 t = store_get(sizeof(tree_node) + s-ss);
2708 Ustrncpy(t->name, ss, s-ss);
2709 t->name[s-ss] = 0;
2710 while (isspace(*s)) s++;
2711
2712 if (!tree_insertnode(anchorp, t))
2713 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2714 "duplicate name \"%s\" for a named %s", t->name, tname);
2715
2716 t->data.ptr = nb;
2717 nb->number = *numberp;
2718 *numberp += 1;
2719
2720 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2721 "missing '=' after \"%s\"", t->name);
2722 while (isspace(*s)) s++;
2723 nb->string = read_string(s, t->name);
2724 nb->cache_data = NULL;
2725
2726 /* Check the string for any expansions; if any are found, mark this list
2727 uncacheable unless the user has explicited forced caching. */
2728
2729 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2730 }
2731
2732
2733
2734
2735 /*************************************************
2736 * Unpick data for a rate limit *
2737 *************************************************/
2738
2739 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2740 separate values.
2741
2742 Arguments:
2743 s string, in the form t,b,f,l
2744 where t is the threshold (integer)
2745 b is the initial delay (time)
2746 f is the multiplicative factor (fixed point)
2747 k is the maximum time (time)
2748 threshold where to store threshold
2749 base where to store base in milliseconds
2750 factor where to store factor in milliseconds
2751 limit where to store limit
2752
2753 Returns: nothing (panics on error)
2754 */
2755
2756 static void
2757 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2758 int *limit)
2759 {
2760 uschar bstring[16], lstring[16];
2761
2762 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2763 factor, lstring) == 4)
2764 {
2765 *base = readconf_readtime(bstring, 0, TRUE);
2766 *limit = readconf_readtime(lstring, 0, TRUE);
2767 if (*base >= 0 && *limit >= 0) return;
2768 }
2769 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2770 }
2771
2772
2773
2774
2775 /*************************************************
2776 * Drop privs for checking TLS config *
2777 *************************************************/
2778
2779 /* We want to validate TLS options during readconf, but do not want to be
2780 root when we call into the TLS library, in case of library linkage errors
2781 which cause segfaults; before this check, those were always done as the Exim
2782 runtime user and it makes sense to continue with that.
2783
2784 Assumes: tls_require_ciphers has been set, if it will be
2785 exim_user has been set, if it will be
2786 exim_group has been set, if it will be
2787
2788 Returns: bool for "okay"; false will cause caller to immediately exit.
2789 */
2790
2791 #ifdef SUPPORT_TLS
2792 static BOOL
2793 tls_dropprivs_validate_require_cipher(void)
2794 {
2795 const uschar *errmsg;
2796 pid_t pid;
2797 int rc, status;
2798 void (*oldsignal)(int);
2799
2800 oldsignal = signal(SIGCHLD, SIG_DFL);
2801
2802 fflush(NULL);
2803 if ((pid = fork()) < 0)
2804 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2805
2806 if (pid == 0)
2807 {
2808 /* in some modes, will have dropped privilege already */
2809 if (!geteuid())
2810 exim_setugid(exim_uid, exim_gid, FALSE,
2811 US"calling tls_validate_require_cipher");
2812
2813 errmsg = tls_validate_require_cipher();
2814 if (errmsg)
2815 {
2816 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2817 "tls_require_ciphers invalid: %s", errmsg);
2818 }
2819 fflush(NULL);
2820 _exit(0);
2821 }
2822
2823 do {
2824 rc = waitpid(pid, &status, 0);
2825 } while (rc < 0 && errno == EINTR);
2826
2827 DEBUG(D_tls)
2828 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2829 (int)pid, status);
2830
2831 signal(SIGCHLD, oldsignal);
2832
2833 return status == 0;
2834 }
2835 #endif /* SUPPORT_TLS */
2836
2837
2838
2839
2840 /*************************************************
2841 * Read main configuration options *
2842 *************************************************/
2843
2844 /* This function is the first to be called for configuration reading. It
2845 opens the configuration file and reads general configuration settings until
2846 it reaches the end of the configuration section. The file is then left open so
2847 that the remaining configuration data can subsequently be read if needed for
2848 this run of Exim.
2849
2850 The configuration file must be owned either by root or exim, and be writeable
2851 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2852 in the config file, so the test is done on the compiled in values. A slight
2853 anomaly, to be carefully documented.
2854
2855 The name of the configuration file is taken from a list that is included in the
2856 binary of Exim. It can be altered from the command line, but if that is done,
2857 root privilege is immediately withdrawn unless the caller is root or exim.
2858 The first file on the list that exists is used.
2859
2860 For use on multiple systems that share file systems, first look for a
2861 configuration file whose name has the current node name on the end. If that is
2862 not found, try the generic name. For really contorted configurations, that run
2863 multiple Exims with different uid settings, first try adding the effective uid
2864 before the node name. These complications are going to waste resources on most
2865 systems. Therefore they are available only when requested by compile-time
2866 options. */
2867
2868 void
2869 readconf_main(void)
2870 {
2871 int sep = 0;
2872 struct stat statbuf;
2873 uschar *s, *filename;
2874 uschar *list = config_main_filelist;
2875
2876 /* Loop through the possible file names */
2877
2878 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2879 != NULL)
2880 {
2881 /* Cut out all the fancy processing unless specifically wanted */
2882
2883 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2884 uschar *suffix = filename + Ustrlen(filename);
2885
2886 /* Try for the node-specific file if a node name exists */
2887
2888 #ifdef CONFIGURE_FILE_USE_NODE
2889 struct utsname uts;
2890 if (uname(&uts) >= 0)
2891 {
2892 #ifdef CONFIGURE_FILE_USE_EUID
2893 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2894 config_file = Ufopen(filename, "rb");
2895 if (config_file == NULL)
2896 #endif /* CONFIGURE_FILE_USE_EUID */
2897 {
2898 sprintf(CS suffix, ".%.256s", uts.nodename);
2899 config_file = Ufopen(filename, "rb");
2900 }
2901 }
2902 #endif /* CONFIGURE_FILE_USE_NODE */
2903
2904 /* Otherwise, try the generic name, possibly with the euid added */
2905
2906 #ifdef CONFIGURE_FILE_USE_EUID
2907 if (config_file == NULL)
2908 {
2909 sprintf(CS suffix, ".%ld", (long int)original_euid);
2910 config_file = Ufopen(filename, "rb");
2911 }
2912 #endif /* CONFIGURE_FILE_USE_EUID */
2913
2914 /* Finally, try the unadorned name */
2915
2916 if (config_file == NULL)
2917 {
2918 *suffix = 0;
2919 config_file = Ufopen(filename, "rb");
2920 }
2921 #else /* if neither defined */
2922
2923 /* This is the common case when the fancy processing is not included. */
2924
2925 config_file = Ufopen(filename, "rb");
2926 #endif
2927
2928 /* If the file does not exist, continue to try any others. For any other
2929 error, break out (and die). */
2930
2931 if (config_file != NULL || errno != ENOENT) break;
2932 }
2933
2934 /* On success, save the name for verification; config_filename is used when
2935 logging configuration errors (it changes for .included files) whereas
2936 config_main_filename is the name shown by -bP. Failure to open a configuration
2937 file is a serious disaster. */
2938
2939 if (config_file != NULL)
2940 {
2941 config_filename = config_main_filename = string_copy(filename);
2942 }
2943 else
2944 {
2945 if (filename == NULL)
2946 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2947 "%s", config_main_filelist);
2948 else
2949 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2950 "configuration file %s", filename));
2951 }
2952
2953 /* Check the status of the file we have opened, if we have retained root
2954 privileges and the file isn't /dev/null (which *should* be 0666). */
2955
2956 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
2957 {
2958 if (fstat(fileno(config_file), &statbuf) != 0)
2959 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2960 big_buffer);
2961
2962 if ((statbuf.st_uid != root_uid /* owner not root */
2963 #ifdef CONFIGURE_OWNER
2964 && statbuf.st_uid != config_uid /* owner not the special one */
2965 #endif
2966 ) || /* or */
2967 (statbuf.st_gid != root_gid /* group not root & */
2968 #ifdef CONFIGURE_GROUP
2969 && statbuf.st_gid != config_gid /* group not the special one */
2970 #endif
2971 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2972 /* or */
2973 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2974
2975 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2976 "wrong owner, group, or mode", big_buffer);
2977 }
2978
2979 /* Process the main configuration settings. They all begin with a lower case
2980 letter. If we see something starting with an upper case letter, it is taken as
2981 a macro definition. */
2982
2983 while ((s = get_config_line()) != NULL)
2984 {
2985 if (isupper(s[0])) read_macro_assignment(s);
2986
2987 else if (Ustrncmp(s, "domainlist", 10) == 0)
2988 read_named_list(&domainlist_anchor, &domainlist_count,
2989 MAX_NAMED_LIST, s+10, US"domain list");
2990
2991 else if (Ustrncmp(s, "hostlist", 8) == 0)
2992 read_named_list(&hostlist_anchor, &hostlist_count,
2993 MAX_NAMED_LIST, s+8, US"host list");
2994
2995 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2996 read_named_list(&addresslist_anchor, &addresslist_count,
2997 MAX_NAMED_LIST, s+11, US"address list");
2998
2999 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3000 read_named_list(&localpartlist_anchor, &localpartlist_count,
3001 MAX_NAMED_LIST, s+13, US"local part list");
3002
3003 else
3004 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3005 NULL, US"main option \"%s\" unknown");
3006 }
3007
3008
3009 /* If local_sender_retain is set, local_from_check must be unset. */
3010
3011 if (local_sender_retain && local_from_check)
3012 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3013 "local_sender_retain are set; this combination is not allowed");
3014
3015 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3016 wanted. */
3017
3018 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3019
3020 /* The max retry interval must not be greater than 24 hours. */
3021
3022 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3023
3024 /* remote_max_parallel must be > 0 */
3025
3026 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3027
3028 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3029 start of a new SMTP message. */
3030
3031 freeze_tell_config = freeze_tell;
3032
3033 /* The primary host name may be required for expansion of spool_directory
3034 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3035 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3036 canonize it. Some people like upper case letters in their host names, so we
3037 don't force the case. */
3038
3039 if (primary_hostname == NULL)
3040 {
3041 uschar *hostname;
3042 struct utsname uts;
3043 if (uname(&uts) < 0)
3044 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3045 hostname = US uts.nodename;
3046
3047 if (Ustrchr(hostname, '.') == NULL)
3048 {
3049 int af = AF_INET;
3050 struct hostent *hostdata;
3051
3052 #if HAVE_IPV6
3053 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3054 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
3055 TRUE, NULL) != OK))
3056 af = AF_INET6;
3057 #else
3058 af = AF_INET;
3059 #endif
3060
3061 for (;;)
3062 {
3063 #if HAVE_IPV6
3064 #if HAVE_GETIPNODEBYNAME
3065 int error_num;
3066 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3067 #else
3068 hostdata = gethostbyname2(CS hostname, af);
3069 #endif
3070 #else
3071 hostdata = gethostbyname(CS hostname);
3072 #endif
3073
3074 if (hostdata != NULL)
3075 {
3076 hostname = US hostdata->h_name;
3077 break;
3078 }
3079
3080 if (af == AF_INET) break;
3081 af = AF_INET;
3082 }
3083 }
3084
3085 primary_hostname = string_copy(hostname);
3086 }
3087
3088 /* Set up default value for smtp_active_hostname */
3089
3090 smtp_active_hostname = primary_hostname;
3091
3092 /* If spool_directory wasn't set in the build-time configuration, it must have
3093 got set above. Of course, writing to the log may not work if log_file_path is
3094 not set, but it will at least get to syslog or somewhere, with any luck. */
3095
3096 if (*spool_directory == 0)
3097 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3098 "proceed");
3099
3100 /* Expand the spool directory name; it may, for example, contain the primary
3101 host name. Same comment about failure. */
3102
3103 s = expand_string(spool_directory);
3104 if (s == NULL)
3105 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3106 "\"%s\": %s", spool_directory, expand_string_message);
3107 spool_directory = s;
3108
3109 /* Expand log_file_path, which must contain "%s" in any component that isn't
3110 the null string or "syslog". It is also allowed to contain one instance of %D
3111 or %M. However, it must NOT contain % followed by anything else. */
3112
3113 if (*log_file_path != 0)
3114 {
3115 uschar *ss, *sss;
3116 int sep = ':'; /* Fixed for log file path */
3117 s = expand_string(log_file_path);
3118 if (s == NULL)
3119 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3120 "\"%s\": %s", log_file_path, expand_string_message);
3121
3122 ss = s;
3123 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3124 {
3125 uschar *t;
3126 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3127 t = Ustrstr(sss, "%s");
3128 if (t == NULL)
3129 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3130 "contain \"%%s\"", sss);
3131 *t = 'X';
3132 t = Ustrchr(sss, '%');
3133 if (t != NULL)
3134 {
3135 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3136 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3137 "unexpected \"%%\" character", s);
3138 }
3139 }
3140
3141 log_file_path = s;
3142 }
3143
3144 /* Interpret syslog_facility into an integer argument for 'ident' param to
3145 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3146 leading "log_". */
3147
3148 if (syslog_facility_str != NULL)
3149 {
3150 int i;
3151 uschar *s = syslog_facility_str;
3152
3153 if ((Ustrlen(syslog_facility_str) >= 4) &&
3154 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3155 s += 4;
3156
3157 for (i = 0; i < syslog_list_size; i++)
3158 {
3159 if (strcmpic(s, syslog_list[i].name) == 0)
3160 {
3161 syslog_facility = syslog_list[i].value;
3162 break;
3163 }
3164 }
3165
3166 if (i >= syslog_list_size)
3167 {
3168 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3169 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3170 }
3171 }
3172
3173 /* Expand pid_file_path */
3174
3175 if (*pid_file_path != 0)
3176 {
3177 s = expand_string(pid_file_path);
3178 if (s == NULL)
3179 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3180 "\"%s\": %s", pid_file_path, expand_string_message);
3181 pid_file_path = s;
3182 }
3183
3184 /* Set default value of process_log_path */
3185
3186 if (process_log_path == NULL || *process_log_path =='\0')
3187 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3188
3189 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3190 message. */
3191
3192 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3193
3194 /* Unpick the SMTP rate limiting options, if set */
3195
3196 if (smtp_ratelimit_mail != NULL)
3197 {
3198 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3199 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3200 }
3201
3202 if (smtp_ratelimit_rcpt != NULL)
3203 {
3204 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3205 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3206 }
3207
3208 /* The qualify domains default to the primary host name */
3209
3210 if (qualify_domain_sender == NULL)
3211 qualify_domain_sender = primary_hostname;
3212 if (qualify_domain_recipient == NULL)
3213 qualify_domain_recipient = qualify_domain_sender;
3214
3215 /* Setting system_filter_user in the configuration sets the gid as well if a
3216 name is given, but a numerical value does not. */
3217
3218 if (system_filter_uid_set && !system_filter_gid_set)
3219 {
3220 struct passwd *pw = getpwuid(system_filter_uid);
3221 if (pw == NULL)
3222 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3223 (long int)system_filter_uid);
3224 system_filter_gid = pw->pw_gid;
3225 system_filter_gid_set = TRUE;
3226 }
3227
3228 /* If the errors_reply_to field is set, check that it is syntactically valid
3229 and ensure it contains a domain. */
3230
3231 if (errors_reply_to != NULL)
3232 {
3233 uschar *errmess;
3234 int start, end, domain;
3235 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3236 &start, &end, &domain, FALSE);
3237
3238 if (recipient == NULL)
3239 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3240 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3241
3242 if (domain == 0)
3243 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3244 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3245 }
3246
3247 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3248 smtp_accept_max must also be set. */
3249
3250 if (smtp_accept_max == 0 &&
3251 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3252 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3253 "smtp_accept_max must be set if smtp_accept_queue or "
3254 "smtp_accept_max_per_host is set");
3255
3256 /* Set up the host number if anything is specified. It is an expanded string
3257 so that it can be computed from the host name, for example. We do this last
3258 so as to ensure that everything else is set up before the expansion. */
3259
3260 if (host_number_string != NULL)
3261 {
3262 long int n;
3263 uschar *end;
3264 uschar *s = expand_string(host_number_string);
3265 if (s == NULL)
3266 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3267 "failed to expand localhost_number \"%s\": %s",
3268 host_number_string, expand_string_message);
3269 n = Ustrtol(s, &end, 0);
3270 while (isspace(*end)) end++;
3271 if (*end != 0)
3272 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3273 "localhost_number value is not a number: %s", s);
3274 if (n > LOCALHOST_MAX)
3275 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3276 "localhost_number is greater than the maximum allowed value (%d)",
3277 LOCALHOST_MAX);
3278 host_number = n;
3279 }
3280
3281 #ifdef SUPPORT_TLS
3282 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3283
3284 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3285 tls_verify_certificates == NULL)
3286 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3287 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3288 (tls_verify_hosts != NULL)? "" : "try_");
3289
3290 /* This also checks that the library linkage is working and we can call
3291 routines in it, so call even if tls_require_ciphers is unset */
3292 if (!tls_dropprivs_validate_require_cipher())
3293 exit(1);
3294
3295 /* Magic number: at time of writing, 1024 has been the long-standing value
3296 used by so many clients, and what Exim used to use always, that it makes
3297 sense to just min-clamp this max-clamp at that. */
3298 if (tls_dh_max_bits < 1024)
3299 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3300 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3301
3302 /* If openssl_options is set, validate it */
3303 if (openssl_options != NULL)
3304 {
3305 # ifdef USE_GNUTLS
3306 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3307 "openssl_options is set but we're using GnuTLS");
3308 # else
3309 long dummy;
3310 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3311 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3312 "openssl_options parse error: %s", openssl_options);
3313 # endif
3314 }
3315 #endif
3316 }
3317
3318
3319
3320 /*************************************************
3321 * Initialize one driver *
3322 *************************************************/
3323
3324 /* This is called once the driver's generic options, if any, have been read.
3325 We can now find the driver, set up defaults for the private options, and
3326 unset any "set" bits in the private options table (which might have been
3327 set by another incarnation of the same driver).
3328
3329 Arguments:
3330 d pointer to driver instance block, with generic
3331 options filled in
3332 drivers_available vector of available drivers
3333 size_of_info size of each block in drivers_available
3334 class class of driver, for error message
3335
3336 Returns: pointer to the driver info block
3337 */
3338
3339 static driver_info *
3340 init_driver(driver_instance *d, driver_info *drivers_available,
3341 int size_of_info, uschar *class)
3342 {
3343 driver_info *dd;
3344
3345 for (dd = drivers_available; dd->driver_name[0] != 0;
3346 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3347 {
3348 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3349 {
3350 int i;
3351 int len = dd->options_len;
3352 d->info = dd;
3353 d->options_block = store_get(len);
3354 memcpy(d->options_block, dd->options_block, len);
3355 for (i = 0; i < *(dd->options_count); i++)
3356 dd->options[i].type &= ~opt_set;
3357 return dd;
3358 }
3359 }
3360
3361 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3362 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3363
3364 return NULL; /* never obeyed */
3365 }
3366
3367
3368
3369
3370 /*************************************************
3371 * Initialize driver list *
3372 *************************************************/
3373
3374 /* This function is called for routers, transports, and authentication
3375 mechanisms. It reads the data from the current point in the configuration file
3376 up to the end of the section, and sets up a chain of instance blocks according
3377 to the file's contents. The file will already have been opened by a call to
3378 readconf_main, and must be left open for subsequent reading of further data.
3379
3380 Any errors cause a panic crash. Note that the blocks with names driver_info and
3381 driver_instance must map the first portions of all the _info and _instance
3382 blocks for this shared code to work.
3383
3384 Arguments:
3385 class "router", "transport", or "authenticator"
3386 anchor &routers, &transports, &auths
3387 drivers_available available drivers
3388 size_of_info size of each info block
3389 instance_default points to default data for an instance
3390 instance_size size of instance block
3391 driver_optionlist generic option list
3392 driver_optionlist_count count of generic option list
3393
3394 Returns: nothing
3395 */
3396
3397 void
3398 readconf_driver_init(
3399 uschar *class,
3400 driver_instance **anchor,
3401 driver_info *drivers_available,
3402 int size_of_info,
3403 void *instance_default,
3404 int instance_size,
3405 optionlist *driver_optionlist,
3406 int driver_optionlist_count)
3407 {
3408 driver_instance **p = anchor;
3409 driver_instance *d = NULL;
3410 uschar *buffer;
3411
3412 while ((buffer = get_config_line()) != NULL)
3413 {
3414 uschar name[64];
3415 uschar *s;
3416
3417 /* Read the first name on the line and test for the start of a new driver. A
3418 macro definition indicates the end of the previous driver. If this isn't the
3419 start of a new driver, the line will be re-read. */
3420
3421 s = readconf_readname(name, sizeof(name), buffer);
3422
3423 /* Handle macro definition, first finishing off the initialization of the
3424 previous driver, if any. */
3425
3426 if (isupper(*name) && *s == '=')
3427 {
3428 if (d != NULL)
3429 {
3430 if (d->driver_name == NULL)
3431 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3432 "no driver defined for %s \"%s\"", class, d->name);
3433 (d->info->init)(d);
3434 d = NULL;
3435 }
3436 read_macro_assignment(buffer);
3437 continue;
3438 }
3439
3440 /* If the line starts with a name terminated by a colon, we are at the
3441 start of the definition of a new driver. The rest of the line must be
3442 blank. */
3443
3444 if (*s++ == ':')
3445 {
3446 int i;
3447
3448 /* Finish off initializing the previous driver. */
3449
3450 if (d != NULL)
3451 {
3452 if (d->driver_name == NULL)
3453 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3454 "no driver defined for %s \"%s\"", class, d->name);
3455 (d->info->init)(d);
3456 }
3457
3458 /* Check that we haven't already got a driver of this name */
3459
3460 for (d = *anchor; d != NULL; d = d->next)
3461 if (Ustrcmp(name, d->name) == 0)
3462 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3463 "there are two %ss called \"%s\"", class, name);
3464
3465 /* Set up a new driver instance data block on the chain, with
3466 its default values installed. */
3467
3468 d = store_get(instance_size);
3469 memcpy(d, instance_default, instance_size);
3470 *p = d;
3471 p = &(d->next);
3472 d->name = string_copy(name);
3473
3474 /* Clear out the "set" bits in the generic options */
3475
3476 for (i = 0; i < driver_optionlist_count; i++)
3477 driver_optionlist[i].type &= ~opt_set;
3478
3479 /* Check nothing more on this line, then do the next loop iteration. */
3480
3481 while (isspace(*s)) s++;
3482 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3483 continue;
3484 }
3485
3486 /* Not the start of a new driver. Give an error if we have not set up a
3487 current driver yet. */
3488
3489 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3490 "%s name missing", class);
3491
3492 /* First look to see if this is a generic option; if it is "driver",
3493 initialize the driver. If is it not a generic option, we can look for a
3494 private option provided that the driver has been previously set up. */
3495
3496 if (readconf_handle_option(buffer, driver_optionlist,
3497 driver_optionlist_count, d, NULL))
3498 {
3499 if (d->info == NULL && d->driver_name != NULL)
3500 init_driver(d, drivers_available, size_of_info, class);
3501 }
3502
3503 /* Handle private options - pass the generic block because some may
3504 live therein. A flag with each option indicates if it is in the public
3505 block. */
3506
3507 else if (d->info != NULL)
3508 {
3509 readconf_handle_option(buffer, d->info->options,
3510 *(d->info->options_count), d, US"option \"%s\" unknown");
3511 }
3512
3513 /* The option is not generic and the driver name has not yet been given. */
3514
3515 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3516 "(\"driver\" must be specified before any private options)", name);
3517 }
3518
3519 /* Run the initialization function for the final driver. */
3520
3521 if (d != NULL)
3522 {
3523 if (d->driver_name == NULL)
3524 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3525 "no driver defined for %s \"%s\"", class, d->name);
3526 (d->info->init)(d);
3527 }
3528 }
3529
3530
3531
3532 /*************************************************
3533 * Check driver dependency *
3534 *************************************************/
3535
3536 /* This function is passed a driver instance and a string. It checks whether
3537 any of the string options for the driver contains the given string as an
3538 expansion variable.
3539
3540 Arguments:
3541 d points to a driver instance block
3542 s the string to search for
3543
3544 Returns: TRUE if a dependency is found
3545 */
3546
3547 BOOL
3548 readconf_depends(driver_instance *d, uschar *s)
3549 {
3550 int count = *(d->info->options_count);
3551 optionlist *ol;
3552 uschar *ss;
3553
3554 for (ol = d->info->options; ol < d->info->options + count; ol++)
3555 {
3556 void *options_block;
3557 uschar *value;
3558 int type = ol->type & opt_mask;
3559 if (type != opt_stringptr) continue;
3560 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3561 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3562 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3563 {
3564 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3565 isalnum(ss[Ustrlen(s)])) continue;
3566 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3567 d->name, ol->name, s);
3568 return TRUE;
3569 }
3570 }
3571
3572 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3573 return FALSE;
3574 }
3575
3576
3577
3578
3579 /*************************************************
3580 * Decode an error type for retries *
3581 *************************************************/
3582
3583 /* This function is global because it is also called from the main
3584 program when testing retry information. It decodes strings such as "quota_7d"
3585 into numerical error codes.
3586
3587 Arguments:
3588 pp points to start of text
3589 p points past end of text
3590 basic_errno points to an int to receive the main error number
3591 more_errno points to an int to receive the secondary error data
3592
3593 Returns: NULL if decoded correctly; else points to error text
3594 */
3595
3596 uschar *
3597 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3598 {
3599 int len;
3600 uschar *q = pp;
3601 while (q < p && *q != '_') q++;
3602 len = q - pp;
3603
3604 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3605 {
3606 *basic_errno = ERRNO_EXIMQUOTA;
3607 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3608 return US"bad time value";
3609 }
3610
3611 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3612 {
3613 *basic_errno = ECONNREFUSED;
3614 if (q != p)
3615 {
3616 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3617 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3618 else return US"A or MX expected after \"refused\"";
3619 }
3620 }
3621
3622 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3623 {
3624 *basic_errno = ETIMEDOUT;
3625 if (q != p)
3626 {
3627 int i;
3628 int xlen = p - q - 1;
3629 uschar *x = q + 1;
3630
3631 static uschar *extras[] =
3632 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3633 static int values[] =
3634 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3635
3636 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3637 {
3638 if (strncmpic(x, extras[i], xlen) == 0)
3639 {
3640 *more_errno = values[i];
3641 break;
3642 }
3643 }
3644
3645 if (i >= sizeof(extras)/sizeof(uschar *))
3646 {
3647 if (strncmpic(x, US"DNS", xlen) == 0)
3648 {
3649 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3650 "available in retry rules (it has never worked) - treated as "
3651 "\"timeout\"");
3652 }
3653 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3654 }
3655 }
3656 }
3657
3658 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3659 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3660 strncmpic(pp, US"data_4", 6) == 0)
3661 {
3662 BOOL bad = FALSE;
3663 int x = 255; /* means "any 4xx code" */
3664 if (p != pp + 8) bad = TRUE; else
3665 {
3666 int a = pp[6], b = pp[7];
3667 if (isdigit(a))
3668 {
3669 x = (a - '0') * 10;
3670 if (isdigit(b)) x += b - '0';
3671 else if (b == 'x') x += 100;
3672 else bad = TRUE;
3673 }
3674 else if (a != 'x' || b != 'x') bad = TRUE;
3675 }
3676
3677 if (bad)
3678 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3679 "x is literal and d is any digit", pp);
3680
3681 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3682 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3683 *more_errno = x << 8;
3684 }
3685
3686 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3687 strncmpic(q+1, US"failed", p-q-1) == 0)
3688 *basic_errno = ERRNO_AUTHFAIL;
3689
3690 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3691 *basic_errno = ERRNO_SMTPCLOSED;
3692
3693 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3694 *basic_errno = ERRNO_TLSREQUIRED;
3695
3696 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3697 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3698
3699 return NULL;
3700 }
3701
3702
3703
3704
3705 /*************************************************
3706 * Read retry information *
3707 *************************************************/
3708
3709 /* Each line of retry information contains:
3710
3711 . A domain name pattern or an address pattern;
3712
3713 . An error name, possibly with additional data, or *;
3714
3715 . An optional sequence of retry items, each consisting of an identifying
3716 letter, a cutoff time, and optional parameters.
3717
3718 All this is decoded and placed into a control block. */
3719
3720
3721 /* Subroutine to read an argument, preceded by a comma and terminated
3722 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3723 1 = fixed point number (returned *1000).
3724
3725 Arguments:
3726 paddr pointer to pointer to current character; updated
3727 type 0 => read a time; 1 => read a fixed point number
3728
3729 Returns: time in seconds or fixed point number * 1000
3730 */
3731
3732 static int
3733 retry_arg(uschar **paddr, int type)
3734 {
3735 uschar *p = *paddr;
3736 uschar *pp;
3737
3738 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3739
3740 while (isspace(*p)) p++;
3741 pp = p;
3742 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3743
3744 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3745 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3746
3747 *paddr = p;
3748 switch (type)
3749 {
3750 case 0:
3751 return readconf_readtime(pp, *p, FALSE);
3752 case 1:
3753 return readconf_readfixed(pp, *p);
3754 }
3755 return 0; /* Keep picky compilers happy */
3756 }
3757
3758 /* The function proper */
3759
3760 void
3761 readconf_retries(void)
3762 {
3763 retry_config **chain = &retries;
3764 retry_config *next;
3765 uschar *p;
3766
3767 while ((p = get_config_line()) != NULL)
3768 {
3769 retry_rule **rchain;
3770 uschar *pp, *error;
3771
3772 next = store_get(sizeof(retry_config));
3773 next->next = NULL;
3774 *chain = next;
3775 chain = &(next->next);
3776 next->basic_errno = next->more_errno = 0;
3777 next->senders = NULL;
3778 next->rules = NULL;
3779 rchain = &(next->rules);
3780
3781 next->pattern = string_dequote(&p);
3782 while (isspace(*p)) p++;
3783 pp = p;
3784 while (mac_isgraph(*p)) p++;
3785 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3786 "missing error type");
3787
3788 /* Test error names for things we understand. */
3789
3790 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3791 &(next->more_errno))) != NULL)
3792 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3793
3794 /* There may be an optional address list of senders to be used as another
3795 constraint on the rule. This was added later, so the syntax is a bit of a
3796 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3797 an address list. */
3798
3799 while (isspace(*p)) p++;
3800 if (Ustrncmp(p, "senders", 7) == 0)
3801 {
3802 p += 7;
3803 while (isspace(*p)) p++;
3804 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3805 "\"=\" expected after \"senders\" in retry rule");
3806 while (isspace(*p)) p++;
3807 next->senders = string_dequote(&p);
3808 }
3809
3810 /* Now the retry rules. Keep the maximum timeout encountered. */
3811
3812 while (isspace(*p)) p++;
3813
3814 while (*p != 0)
3815 {
3816 retry_rule *rule = store_get(sizeof(retry_rule));
3817 *rchain = rule;
3818 rchain = &(rule->next);
3819 rule->next = NULL;
3820 rule->rule = toupper(*p++);
3821 rule->timeout = retry_arg(&p, 0);
3822 if (rule->timeout > retry_maximum_timeout)
3823 retry_maximum_timeout = rule->timeout;
3824
3825 switch (rule->rule)
3826 {
3827 case 'F': /* Fixed interval */
3828 rule->p1 = retry_arg(&p, 0);
3829 break;
3830
3831 case 'G': /* Geometrically increasing intervals */
3832 case 'H': /* Ditto, but with randomness */
3833 rule->p1 = retry_arg(&p, 0);
3834 rule->p2 = retry_arg(&p, 1);
3835 break;
3836
3837 default:
3838 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3839 break;
3840 }
3841
3842 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3843 (rule->rule != 'F' && rule->p2 < 1000))
3844 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3845 "bad parameters for retry rule");
3846
3847 while (isspace(*p)) p++;
3848 if (*p == ';')
3849 {
3850 p++;
3851 while (isspace(*p)) p++;
3852 }
3853 else if (*p != 0)
3854 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3855 }
3856 }
3857 }
3858
3859
3860
3861 /*************************************************
3862 * Initialize authenticators *
3863 *************************************************/
3864
3865 /* Read the authenticators section of the configuration file.
3866
3867 Arguments: none
3868 Returns: nothing
3869 */
3870
3871 static void
3872 auths_init(void)
3873 {
3874 auth_instance *au, *bu;
3875 readconf_driver_init(US"authenticator",
3876 (driver_instance **)(&auths), /* chain anchor */
3877 (driver_info *)auths_available, /* available drivers */
3878 sizeof(auth_info), /* size of info block */
3879 &auth_defaults, /* default values for generic options */
3880 sizeof(auth_instance), /* size of instance block */
3881 optionlist_auths, /* generic options */
3882 optionlist_auths_size);
3883
3884 for (au = auths; au != NULL; au = au->next)
3885 {
3886 if (au->public_name == NULL)
3887 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3888 "the %s authenticator", au->name);
3889 for (bu = au->next; bu != NULL; bu = bu->next)
3890 {
3891 if (strcmpic(au->public_name, bu->public_name) == 0)
3892 {
3893 if ((au->client && bu->client) || (au->server && bu->server))
3894 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3895 "(%s and %s) have the same public name (%s)",
3896 (au->client)? US"client" : US"server", au->name, bu->name,
3897 au->public_name);
3898 }
3899 }
3900 }
3901 }
3902
3903
3904
3905
3906 /*************************************************
3907 * Read ACL information *
3908 *************************************************/
3909
3910 /* If this run of Exim is not doing something that involves receiving a
3911 message, we can just skip over the ACL information. No need to parse it.
3912
3913 First, we have a function for acl_read() to call back to get the next line. We
3914 need to remember the line we passed, because at the end it will contain the
3915 name of the next ACL. */
3916
3917 static uschar *acl_line;
3918
3919 static uschar *
3920 acl_callback(void)
3921 {
3922 acl_line = get_config_line();
3923 return acl_line;
3924 }
3925
3926
3927 /* Now the main function:
3928
3929 Arguments:
3930 skip TRUE when this Exim process is doing something that will
3931 not need the ACL data
3932
3933 Returns: nothing
3934 */
3935
3936 static void
3937 readconf_acl(BOOL skip)
3938 {
3939 uschar *p;
3940
3941 /* Not receiving messages, don't need to parse the ACL data */
3942
3943 if (skip)
3944 {
3945 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3946 while ((p = get_config_line()) != NULL);
3947 return;
3948 }
3949
3950 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3951 between ACLs. */
3952
3953 acl_line = get_config_line();
3954
3955 while(acl_line != NULL)
3956 {
3957 uschar name[64];
3958 tree_node *node;
3959 uschar *error;
3960
3961 p = readconf_readname(name, sizeof(name), acl_line);
3962 if (isupper(*name) && *p == '=')
3963 {
3964 read_macro_assignment(acl_line);
3965 acl_line = get_config_line();
3966 continue;
3967 }
3968
3969 if (*p != ':' || name[0] == 0)
3970 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
3971
3972 node = store_get(sizeof(tree_node) + Ustrlen(name));
3973 Ustrcpy(node->name, name);
3974 if (!tree_insertnode(&acl_anchor, node))
3975 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3976 "there are two ACLs called \"%s\"", name);
3977
3978 node->data.ptr = acl_read(acl_callback, &error);
3979
3980 if (node->data.ptr == NULL && error != NULL)
3981 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3982 }
3983 }
3984
3985
3986
3987 /*************************************************
3988 * Read configuration for local_scan() *
3989 *************************************************/
3990
3991 /* This function is called after "begin local_scan" is encountered in the
3992 configuration file. If the local_scan() function allows for configuration
3993 options, we can process them. Otherwise, we expire in a panic.
3994
3995 Arguments: none
3996 Returns: nothing
3997 */
3998
3999 static void
4000 local_scan_init(void)
4001 {
4002 #ifndef LOCAL_SCAN_HAS_OPTIONS
4003 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4004 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4005 #else
4006
4007 uschar *p;
4008 while ((p = get_config_line()) != NULL)
4009 {
4010 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4011 NULL, US"local_scan option \"%s\" unknown");
4012 }
4013 #endif
4014 }
4015
4016
4017
4018 /*************************************************
4019 * Read rest of configuration (after main) *
4020 *************************************************/
4021
4022 /* This function reads the rest of the runtime configuration, after the main
4023 configuration. It is called only when actually needed. Each subsequent section
4024 of the configuration starts with a line of the form
4025
4026 begin name
4027
4028 where the name is "routers", "transports", etc. A section is terminated by
4029 hitting the next "begin" line, and the next name is left in next_section.
4030 Because it may confuse people as to whether the names are singular or plural,
4031 we add "s" if it's missing. There is always enough room in next_section for
4032 this. This function is basically just a switch.
4033
4034 Arguments:
4035 skip_acl TRUE if ACL information is not needed
4036
4037 Returns: nothing
4038 */
4039
4040 static uschar *section_list[] = {
4041 US"acls",
4042 US"authenticators",
4043 US"local_scans",
4044 US"retrys",
4045 US"rewrites",
4046 US"routers",
4047 US"transports"};
4048
4049 void
4050 readconf_rest(BOOL skip_acl)
4051 {
4052 int had = 0;
4053
4054 while(next_section[0] != 0)
4055 {
4056 int bit;
4057 int first = 0;
4058 int last = sizeof(section_list) / sizeof(uschar *);
4059 int mid = last/2;
4060 int n = Ustrlen(next_section);
4061
4062 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4063
4064 for (;;)
4065 {
4066 int c = strcmpic(next_section, section_list[mid]);
4067 if (c == 0) break;
4068 if (c > 0) first = mid + 1; else last = mid;
4069 if (first >= last)
4070 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4071 "\"%.*s\" is not a known configuration section name", n, next_section);
4072 mid = (last + first)/2;
4073 }
4074
4075 bit = 1 << mid;
4076 if (((had ^= bit) & bit) == 0)
4077 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4078 "\"%.*s\" section is repeated in the configuration file", n,
4079 next_section);
4080
4081 switch(mid)
4082 {
4083 case 0: readconf_acl(skip_acl); break;
4084 case 1: auths_init(); break;
4085 case 2: local_scan_init(); break;
4086 case 3: readconf_retries(); break;
4087 case 4: readconf_rewrites(); break;
4088 case 5: route_init(); break;
4089 case 6: transport_init(); break;
4090 }
4091 }
4092
4093 (void)fclose(config_file);
4094 }
4095
4096 /* End of readconf.c */
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