Allow Routers to have multiple conditions, IF each one yields a strict bool.
[exim.git] / src / src / readconf.c
CommitLineData
532be449 1/* $Cambridge: exim/src/src/readconf.c,v 1.42 2010/06/07 07:09:10 pdp Exp $ */
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
0a49a7a4 7/* Copyright (c) University of Cambridge 1995 - 2009 */
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8/* See the file NOTICE for conditions of use and distribution. */
9
10/* Functions for reading the configuration file, and for displaying
11overall configuration values. Thanks to Brian Candler for the original
12implementation of the conditional .ifdef etc. */
13
14#include "exim.h"
15
16#define CSTATE_STACK_SIZE 10
17
18
19/* Structure for chain (stack) of .included files */
20
21typedef struct config_file_item {
22 struct config_file_item *next;
23 uschar *filename;
24 FILE *file;
25 int lineno;
26} config_file_item;
27
28/* Structure of table of conditional words and their state transitions */
29
30typedef struct cond_item {
31 uschar *name;
32 int namelen;
33 int action1;
34 int action2;
35 int pushpop;
36} cond_item;
37
38/* Structure of table of syslog facility names and values */
39
40typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43} syslog_fac_item;
44
45
46/* Static variables */
47
48static config_file_item *config_file_stack = NULL; /* For includes */
49
50static uschar *syslog_facility_str = NULL;
51static uschar next_section[24];
52static uschar time_buffer[24];
53
54/* State variables for conditional loading (.ifdef / .else / .endif) */
55
56static int cstate = 0;
57static int cstate_stack_ptr = -1;
58static int cstate_stack[CSTATE_STACK_SIZE];
59
60/* Table of state transitions for handling conditional inclusions. There are
61four possible state transitions:
62
63 .ifdef true
64 .ifdef false
65 .elifdef true (or .else)
66 .elifdef false
67
68.endif just causes the previous cstate to be popped off the stack */
69
70static int next_cstate[3][4] =
71 {
72 /* State 0: reading from file, or reading until next .else or .endif */
73 { 0, 1, 2, 2 },
74 /* State 1: condition failed, skipping until next .else or .endif */
75 { 2, 2, 0, 1 },
76 /* State 2: skipping until .endif */
77 { 2, 2, 2, 2 },
78 };
79
80/* Table of conditionals and the states to set. For each name, there are four
81values: the length of the name (to save computing it each time), the state to
82set if a macro was found in the line, the state to set if a macro was not found
83in the line, and a stack manipulation setting which is:
84
85 -1 pull state value off the stack
86 0 don't alter the stack
87 +1 push value onto stack, before setting new state
88*/
89
90static cond_item cond_list[] = {
91 { US"ifdef", 5, 0, 1, 1 },
92 { US"ifndef", 6, 1, 0, 1 },
93 { US"elifdef", 7, 2, 3, 0 },
94 { US"elifndef", 8, 3, 2, 0 },
95 { US"else", 4, 2, 2, 0 },
96 { US"endif", 5, 0, 0, -1 }
97};
98
99static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101/* Table of syslog facility names and their values */
102
103static syslog_fac_item syslog_list[] = {
104 { US"mail", LOG_MAIL },
105 { US"user", LOG_USER },
106 { US"news", LOG_NEWS },
107 { US"uucp", LOG_UUCP },
108 { US"local0", LOG_LOCAL0 },
109 { US"local1", LOG_LOCAL1 },
110 { US"local2", LOG_LOCAL2 },
111 { US"local3", LOG_LOCAL3 },
112 { US"local4", LOG_LOCAL4 },
113 { US"local5", LOG_LOCAL5 },
114 { US"local6", LOG_LOCAL6 },
115 { US"local7", LOG_LOCAL7 },
116 { US"daemon", LOG_DAEMON }
117};
118
119static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
120
121
122
123
124/*************************************************
125* Main configuration options *
126*************************************************/
127
128/* The list of options that can be set in the main configuration file. This
129must be in alphabetic order because it is searched by binary chop. */
130
131static optionlist optionlist_config[] = {
132 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
133 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
134 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
135 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
136 { "accept_8bitmime", opt_bool, &accept_8bitmime },
137 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
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138#ifdef WITH_CONTENT_SCAN
139 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
140#endif
45b91596 141 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
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142 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
143 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
144 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
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145#ifndef DISABLE_DKIM
146 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
147#endif
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148 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
149 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
150 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
151 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
152 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
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153#ifdef WITH_CONTENT_SCAN
154 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
155#endif
8f128379 156 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
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157 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
158 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
159 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
160#ifdef SUPPORT_TLS
161 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
162#endif
163 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
164 { "admin_groups", opt_gidlist, &admin_groups },
165 { "allow_domain_literals", opt_bool, &allow_domain_literals },
166 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
167 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
168 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
169 { "auto_thaw", opt_time, &auto_thaw },
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170#ifdef WITH_CONTENT_SCAN
171 { "av_scanner", opt_stringptr, &av_scanner },
172#endif
059ec3d9 173 { "bi_command", opt_stringptr, &bi_command },
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174#ifdef EXPERIMENTAL_BRIGHTMAIL
175 { "bmi_config_file", opt_stringptr, &bmi_config_file },
176#endif
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177 { "bounce_message_file", opt_stringptr, &bounce_message_file },
178 { "bounce_message_text", opt_stringptr, &bounce_message_text },
179 { "bounce_return_body", opt_bool, &bounce_return_body },
180 { "bounce_return_message", opt_bool, &bounce_return_message },
181 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
182 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
183 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
184 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
185 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
186 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
187 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
188 { "check_log_inodes", opt_int, &check_log_inodes },
189 { "check_log_space", opt_Kint, &check_log_space },
a0d6ba8a 190 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
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191 { "check_spool_inodes", opt_int, &check_spool_inodes },
192 { "check_spool_space", opt_Kint, &check_spool_space },
193 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
194 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
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195 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
196 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
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197#ifdef EXPERIMENTAL_DCC
198 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
199 { "dccifd_address", opt_stringptr, &dccifd_address },
200 { "dccifd_options", opt_stringptr, &dccifd_options },
201#endif
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202 { "delay_warning", opt_timelist, &delay_warning },
203 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
204 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
205 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
206 { "delivery_date_remove", opt_bool, &delivery_date_remove },
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207#ifdef ENABLE_DISABLE_FSYNC
208 { "disable_fsync", opt_bool, &disable_fsync },
209#endif
7e66e54d 210 { "disable_ipv6", opt_bool, &disable_ipv6 },
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211#ifndef DISABLE_DKIM
212 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
213#endif
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214 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
215 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
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216 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
217 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
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218 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
219 { "dns_retrans", opt_time, &dns_retrans },
220 { "dns_retry", opt_int, &dns_retry },
221 /* This option is now a no-op, retained for compability */
222 { "drop_cr", opt_bool, &drop_cr },
223/*********************************************************/
0e22dfd1 224 { "dsn_from", opt_stringptr, &dsn_from },
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225 { "envelope_to_remove", opt_bool, &envelope_to_remove },
226 { "errors_copy", opt_stringptr, &errors_copy },
227 { "errors_reply_to", opt_stringptr, &errors_reply_to },
228 { "exim_group", opt_gid, &exim_gid },
229 { "exim_path", opt_stringptr, &exim_path },
230 { "exim_user", opt_uid, &exim_uid },
231 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
232 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
233 { "finduser_retries", opt_int, &finduser_retries },
234 { "freeze_tell", opt_stringptr, &freeze_tell },
235 { "gecos_name", opt_stringptr, &gecos_name },
236 { "gecos_pattern", opt_stringptr, &gecos_pattern },
83da1223 237#ifdef SUPPORT_TLS
e6060e2c 238 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
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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
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243 { "header_line_maxsize", opt_int, &header_line_maxsize },
244 { "header_maxsize", opt_int, &header_maxsize },
245 { "headers_charset", opt_stringptr, &headers_charset },
246 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
247 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
248 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
249 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
250 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
251 { "hold_domains", opt_stringptr, &hold_domains },
252 { "host_lookup", opt_stringptr, &host_lookup },
253 { "host_lookup_order", opt_stringptr, &host_lookup_order },
254 { "host_reject_connection", opt_stringptr, &host_reject_connection },
255 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
256 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
257#ifdef LOOKUP_IBASE
258 { "ibase_servers", opt_stringptr, &ibase_servers },
259#endif
260 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
261 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
262 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
263 { "keep_malformed", opt_time, &keep_malformed },
264#ifdef LOOKUP_LDAP
265 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
266 { "ldap_version", opt_int, &eldap_version },
267#endif
268 { "local_from_check", opt_bool, &local_from_check },
269 { "local_from_prefix", opt_stringptr, &local_from_prefix },
270 { "local_from_suffix", opt_stringptr, &local_from_suffix },
271 { "local_interfaces", opt_stringptr, &local_interfaces },
272 { "local_scan_timeout", opt_time, &local_scan_timeout },
273 { "local_sender_retain", opt_bool, &local_sender_retain },
274 { "localhost_number", opt_stringptr, &host_number_string },
275 { "log_file_path", opt_stringptr, &log_file_path },
276 { "log_selector", opt_stringptr, &log_selector_string },
277 { "log_timezone", opt_bool, &log_timezone },
278 { "lookup_open_max", opt_int, &lookup_open_max },
279 { "max_username_length", opt_int, &max_username_length },
ddea74fa 280 { "message_body_newlines", opt_bool, &message_body_newlines },
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281 { "message_body_visible", opt_mkint, &message_body_visible },
282 { "message_id_header_domain", opt_stringptr, &message_id_domain },
283 { "message_id_header_text", opt_stringptr, &message_id_text },
284 { "message_logs", opt_bool, &message_logs },
285 { "message_size_limit", opt_stringptr, &message_size_limit },
286#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
287 { "move_frozen_messages", opt_bool, &move_frozen_messages },
288#endif
289 { "mua_wrapper", opt_bool, &mua_wrapper },
290#ifdef LOOKUP_MYSQL
291 { "mysql_servers", opt_stringptr, &mysql_servers },
292#endif
293 { "never_users", opt_uidlist, &never_users },
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294#ifdef SUPPORT_TLS
295 { "openssl_options", opt_stringptr, &openssl_options },
296#endif
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297#ifdef LOOKUP_ORACLE
298 { "oracle_servers", opt_stringptr, &oracle_servers },
299#endif
300 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
301#ifdef EXIM_PERL
302 { "perl_at_start", opt_bool, &opt_perl_at_start },
303 { "perl_startup", opt_stringptr, &opt_perl_startup },
304#endif
305#ifdef LOOKUP_PGSQL
306 { "pgsql_servers", opt_stringptr, &pgsql_servers },
307#endif
308 { "pid_file_path", opt_stringptr, &pid_file_path },
309 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
310 { "preserve_message_logs", opt_bool, &preserve_message_logs },
311 { "primary_hostname", opt_stringptr, &primary_hostname },
312 { "print_topbitchars", opt_bool, &print_topbitchars },
313 { "process_log_path", opt_stringptr, &process_log_path },
314 { "prod_requires_admin", opt_bool, &prod_requires_admin },
315 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
316 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
317 { "queue_domains", opt_stringptr, &queue_domains },
318 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
319 { "queue_only", opt_bool, &queue_only },
320 { "queue_only_file", opt_stringptr, &queue_only_file },
321 { "queue_only_load", opt_fixed, &queue_only_load },
8669f003 322 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
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323 { "queue_only_override", opt_bool, &queue_only_override },
324 { "queue_run_in_order", opt_bool, &queue_run_in_order },
325 { "queue_run_max", opt_int, &queue_run_max },
326 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
327 { "receive_timeout", opt_time, &receive_timeout },
328 { "received_header_text", opt_stringptr, &received_header_text },
329 { "received_headers_max", opt_int, &received_headers_max },
330 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
331 { "recipients_max", opt_int, &recipients_max },
332 { "recipients_max_reject", opt_bool, &recipients_max_reject },
333 { "remote_max_parallel", opt_int, &remote_max_parallel },
334 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
335 { "retry_data_expire", opt_time, &retry_data_expire },
336 { "retry_interval_max", opt_time, &retry_interval_max },
337 { "return_path_remove", opt_bool, &return_path_remove },
338 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
339 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
340 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
341 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
342 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
343 { "smtp_accept_max", opt_int, &smtp_accept_max },
344 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
345 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
346 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
347 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
348 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
349 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
350 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
351 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
352 { "smtp_banner", opt_stringptr, &smtp_banner },
353 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
354 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
355 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
356 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
357 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
358 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
359 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
360 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
361 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
362 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
363 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
364 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
365 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
366 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
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367#ifdef WITH_CONTENT_SCAN
368 { "spamd_address", opt_stringptr, &spamd_address },
369#endif
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370#ifdef EXPERIMENTAL_SPF
371 { "spf_guess", opt_stringptr, &spf_guess },
372#endif
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373 { "split_spool_directory", opt_bool, &split_spool_directory },
374 { "spool_directory", opt_stringptr, &spool_directory },
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375#ifdef LOOKUP_SQLITE
376 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
377#endif
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378#ifdef EXPERIMENTAL_SRS
379 { "srs_config", opt_stringptr, &srs_config },
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380 { "srs_hashlength", opt_int, &srs_hashlength },
381 { "srs_hashmin", opt_int, &srs_hashmin },
382 { "srs_maxage", opt_int, &srs_maxage },
383 { "srs_secrets", opt_stringptr, &srs_secrets },
384 { "srs_usehash", opt_bool, &srs_usehash },
385 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
8523533c 386#endif
38a0a95f 387 { "strict_acl_vars", opt_bool, &strict_acl_vars },
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388 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
389 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
390 { "syslog_duplication", opt_bool, &syslog_duplication },
391 { "syslog_facility", opt_stringptr, &syslog_facility_str },
392 { "syslog_processname", opt_stringptr, &syslog_processname },
393 { "syslog_timestamp", opt_bool, &syslog_timestamp },
394 { "system_filter", opt_stringptr, &system_filter },
395 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
396 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
397 { "system_filter_group", opt_gid, &system_filter_gid },
398 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
399 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
400 { "system_filter_user", opt_uid, &system_filter_uid },
401 { "tcp_nodelay", opt_bool, &tcp_nodelay },
402 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
403 { "timezone", opt_stringptr, &timezone_string },
404#ifdef SUPPORT_TLS
405 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
406 { "tls_certificate", opt_stringptr, &tls_certificate },
407 { "tls_crl", opt_stringptr, &tls_crl },
408 { "tls_dhparam", opt_stringptr, &tls_dhparam },
409 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
410 { "tls_privatekey", opt_stringptr, &tls_privatekey },
411 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
412 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
413 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
414 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
415 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
416#endif
417 { "trusted_groups", opt_gidlist, &trusted_groups },
418 { "trusted_users", opt_uidlist, &trusted_users },
419 { "unknown_login", opt_stringptr, &unknown_login },
420 { "unknown_username", opt_stringptr, &unknown_username },
421 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
422 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
423 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
424 { "warn_message_file", opt_stringptr, &warn_message_file },
425 { "write_rejectlog", opt_bool, &write_rejectlog }
426};
427
428static int optionlist_config_size =
429 sizeof(optionlist_config)/sizeof(optionlist);
430
431
432
433/*************************************************
434* Find the name of an option *
435*************************************************/
436
437/* This function is to aid debugging. Various functions take arguments that are
438pointer variables in the options table or in option tables for various drivers.
439For debugging output, it is useful to be able to find the name of the option
440which is currently being processed. This function finds it, if it exists, by
441searching the table(s).
442
443Arguments: a value that is presumed to be in the table above
444Returns: the option name, or an empty string
445*/
446
447uschar *
448readconf_find_option(void *p)
449{
450int i;
451router_instance *r;
452transport_instance *t;
453
454for (i = 0; i < optionlist_config_size; i++)
455 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
456
457for (r = routers; r != NULL; r = r->next)
458 {
459 router_info *ri = r->info;
460 for (i = 0; i < ri->options_count[0]; i++)
461 {
462 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
463 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
464 return US ri->options[i].name;
465 }
466 }
467
468for (t = transports; t != NULL; t = t->next)
469 {
470 transport_info *ti = t->info;
471 for (i = 0; i < ti->options_count[0]; i++)
472 {
473 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
474 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
475 return US ti->options[i].name;
476 }
477 }
478
479return US"";
480}
481
482
483
484
cf00dad6
PH
485/*************************************************
486* Deal with an assignment to a macro *
487*************************************************/
488
489/* This function is called when a line that starts with an upper case letter is
490encountered. The argument "line" should contain a complete logical line, and
491start with the first letter of the macro name. The macro name and the
492replacement text are extracted and stored. Redefinition of existing,
493non-command line, macros is permitted using '==' instead of '='.
494
495Arguments:
496 s points to the start of the logical line
497
498Returns: nothing
499*/
500
501static void
502read_macro_assignment(uschar *s)
503{
504uschar name[64];
505int namelen = 0;
506BOOL redef = FALSE;
507macro_item *m;
508macro_item *mlast = NULL;
509
510while (isalnum(*s) || *s == '_')
511 {
512 if (namelen >= sizeof(name) - 1)
513 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
514 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
515 name[namelen++] = *s++;
516 }
517name[namelen] = 0;
518
519while (isspace(*s)) s++;
520if (*s++ != '=')
521 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
522
523if (*s == '=')
524 {
525 redef = TRUE;
526 s++;
527 }
528while (isspace(*s)) s++;
529
530/* If an existing macro of the same name was defined on the command line, we
531just skip this definition. It's an error to attempt to redefine a macro without
532redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
533It is also an error to define a macro whose name begins with the name of a
534previously defined macro. Note: it is documented that the other way round
535works. */
536
537for (m = macros; m != NULL; m = m->next)
538 {
539 int len = Ustrlen(m->name);
540
541 if (Ustrcmp(m->name, name) == 0)
542 {
543 if (!m->command_line && !redef)
544 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
545 "defined (use \"==\" if you want to redefine it", name);
546 break;
547 }
548
549 if (len < namelen && Ustrstr(name, m->name) != NULL)
550 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
551 "a macro because previously defined macro \"%s\" is a substring",
552 name, m->name);
553
554 /* We cannot have this test, because it is documented that a substring
555 macro is permitted (there is even an example).
556 *
557 * if (len > namelen && Ustrstr(m->name, name) != NULL)
558 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
559 * "a macro because it is a substring of previously defined macro \"%s\"",
560 * name, m->name);
561 */
562
563 mlast = m;
564 }
565
566/* Check for an overriding command-line definition. */
567
568if (m != NULL && m->command_line) return;
569
570/* Redefinition must refer to an existing macro. */
571
572if (redef)
573 {
574 if (m == NULL)
575 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
576 "\"%s\"", name);
577 }
578
579/* We have a new definition. The macro_item structure includes a final vector
580called "name" which is one byte long. Thus, adding "namelen" gives us enough
581room to store the "name" string. */
582
583else
584 {
585 m = store_get(sizeof(macro_item) + namelen);
586 if (macros == NULL) macros = m; else mlast->next = m;
587 Ustrncpy(m->name, name, namelen);
588 m->name[namelen] = 0;
589 m->next = NULL;
590 m->command_line = FALSE;
591 }
592
593/* Set the value of the new or redefined macro */
594
595m->replacement = string_copy(s);
596}
597
598
599
600
059ec3d9
PH
601
602/*************************************************
603* Read configuration line *
604*************************************************/
605
606/* A logical line of text is read from the configuration file into the big
607buffer, taking account of macros, .includes, and continuations. The size of
608big_buffer is increased if necessary. The count of configuration lines is
609maintained. Physical input lines starting with # (ignoring leading white space,
610and after macro replacement) and empty logical lines are always ignored.
611Leading and trailing spaces are removed.
612
613If we hit a line of the form "begin xxxx", the xxxx is placed in the
614next_section vector, and the function returns NULL, indicating the end of a
615configuration section. On end-of-file, NULL is returned with next_section
616empty.
617
618Arguments: none
619
620Returns: a pointer to the first non-blank in the line,
621 or NULL if eof or end of section is reached
622*/
623
624static uschar *
625get_config_line(void)
626{
627int startoffset = 0; /* To first non-blank char in logical line */
628int len = 0; /* Of logical line so far */
629int newlen;
630uschar *s, *ss;
631macro_item *m;
632BOOL macro_found;
633
634/* Loop for handling continuation lines, skipping comments, and dealing with
635.include files. */
636
637for (;;)
638 {
639 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
640 {
641 if (config_file_stack != NULL) /* EOF inside .include */
642 {
f1e894f3 643 (void)fclose(config_file);
059ec3d9
PH
644 config_file = config_file_stack->file;
645 config_filename = config_file_stack->filename;
646 config_lineno = config_file_stack->lineno;
647 config_file_stack = config_file_stack->next;
648 continue;
649 }
650
651 /* EOF at top level */
652
653 if (cstate_stack_ptr >= 0)
654 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
655 "Unexpected end of configuration file: .endif missing");
656
657 if (len != 0) break; /* EOF after continuation */
658 next_section[0] = 0; /* EOF at start of logical line */
659 return NULL;
660 }
661
662 config_lineno++;
663 newlen = len + Ustrlen(big_buffer + len);
664
665 /* Handle pathologically long physical lines - yes, it did happen - by
666 extending big_buffer at this point. The code also copes with very long
667 logical lines. */
668
669 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
670 {
671 uschar *newbuffer;
672 big_buffer_size += BIG_BUFFER_SIZE;
673 newbuffer = store_malloc(big_buffer_size);
674
675 /* This use of strcpy is OK because we know that the string in the old
676 buffer is shorter than the new buffer. */
677
678 Ustrcpy(newbuffer, big_buffer);
679 store_free(big_buffer);
680 big_buffer = newbuffer;
681 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
682 break;
683 newlen += Ustrlen(big_buffer + newlen);
684 }
685
686 /* Find the true start of the physical line - leading spaces are always
687 ignored. */
688
689 ss = big_buffer + len;
690 while (isspace(*ss)) ss++;
691
692 /* Process the physical line for macros. If this is the start of the logical
693 line, skip over initial text at the start of the line if it starts with an
694 upper case character followed by a sequence of name characters and an equals
695 sign, because that is the definition of a new macro, and we don't do
696 replacement therein. */
697
698 s = ss;
699 if (len == 0 && isupper(*s))
700 {
701 while (isalnum(*s) || *s == '_') s++;
702 while (isspace(*s)) s++;
703 if (*s != '=') s = ss; /* Not a macro definition */
704 }
705
706 /* For each defined macro, scan the line (from after XXX= if present),
707 replacing all occurrences of the macro. */
708
709 macro_found = FALSE;
710 for (m = macros; m != NULL; m = m->next)
711 {
712 uschar *p, *pp;
713 uschar *t = s;
714
715 while ((p = Ustrstr(t, m->name)) != NULL)
716 {
717 int moveby;
718 int namelen = Ustrlen(m->name);
719 int replen = Ustrlen(m->replacement);
720
721 /* Expand the buffer if necessary */
722
723 while (newlen - namelen + replen + 1 > big_buffer_size)
724 {
725 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
726 uschar *newbuffer = store_malloc(newsize);
727 memcpy(newbuffer, big_buffer, newlen + 1);
728 p = newbuffer + (p - big_buffer);
729 s = newbuffer + (s - big_buffer);
730 ss = newbuffer + (ss - big_buffer);
731 t = newbuffer + (t - big_buffer);
732 big_buffer_size = newsize;
733 store_free(big_buffer);
734 big_buffer = newbuffer;
735 }
736
737 /* Shuffle the remaining characters up or down in the buffer before
738 copying in the replacement text. Don't rescan the replacement for this
739 same macro. */
740
741 pp = p + namelen;
742 moveby = replen - namelen;
743 if (moveby != 0)
744 {
745 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
746 newlen += moveby;
747 }
748 Ustrncpy(p, m->replacement, replen);
749 t = p + replen;
750 macro_found = TRUE;
751 }
752 }
753
754 /* An empty macro replacement at the start of a line could mean that ss no
755 longer points to the first non-blank character. */
756
757 while (isspace(*ss)) ss++;
758
759 /* Check for comment lines - these are physical lines. */
760
761 if (*ss == '#') continue;
762
763 /* Handle conditionals, which are also applied to physical lines. Conditions
764 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
765 expansion occured on the rest of the line. A preliminary test for the leading
766 '.' saves effort on most lines. */
767
768 if (*ss == '.')
769 {
770 int i;
771
772 /* Search the list of conditional directives */
773
774 for (i = 0; i < cond_list_size; i++)
775 {
776 int n;
777 cond_item *c = cond_list+i;
778 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
779
780 /* The following character must be white space or end of string */
781
782 n = ss[1 + c->namelen];
783 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
784
785 /* .ifdef and .ifndef push the current state onto the stack, then set
786 a new one from the table. Stack overflow is an error */
787
788 if (c->pushpop > 0)
789 {
790 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
791 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
792 ".%s nested too deeply", c->name);
793 cstate_stack[++cstate_stack_ptr] = cstate;
794 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
795 }
796
797 /* For any of the others, stack underflow is an error. The next state
798 comes either from the stack (.endif) or from the table. */
799
800 else
801 {
802 if (cstate_stack_ptr < 0)
803 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
804 ".%s without matching .ifdef", c->name);
805 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
806 next_cstate[cstate][macro_found? c->action1 : c->action2];
807 }
808
809 /* Having dealt with a directive, break the loop */
810
811 break;
812 }
813
814 /* If we have handled a conditional directive, continue with the next
815 physical line. Otherwise, fall through. */
816
817 if (i < cond_list_size) continue;
818 }
819
820 /* If the conditional state is not 0 (actively using these lines), ignore
821 this input line. */
822
823 if (cstate != 0) continue; /* Conditional skip */
824
825 /* Handle .include lines - these are also physical lines. */
826
827 if (Ustrncmp(ss, ".include", 8) == 0 &&
828 (isspace(ss[8]) ||
829 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
830 {
831 uschar *t;
832 int include_if_exists = isspace(ss[8])? 0 : 10;
833 config_file_item *save;
834 struct stat statbuf;
835
836 ss += 9 + include_if_exists;
837 while (isspace(*ss)) ss++;
838 t = ss + Ustrlen(ss);
839 while (t > ss && isspace(t[-1])) t--;
840 if (*ss == '\"' && t[-1] == '\"')
841 {
842 ss++;
843 t--;
844 }
845 *t = 0;
846
145396a6
PH
847 if (*ss != '/')
848 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
849 "absolute path \"%s\"", ss);
850
059ec3d9
PH
851 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
852
853 save = store_get(sizeof(config_file_item));
854 save->next = config_file_stack;
855 config_file_stack = save;
856 save->file = config_file;
857 save->filename = config_filename;
858 save->lineno = config_lineno;
859
860 config_file = Ufopen(ss, "rb");
861 if (config_file == NULL)
862 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
863 "configuration file %s", ss);
864 config_filename = string_copy(ss);
865 config_lineno = 0;
866 continue;
867 }
868
869 /* If this is the start of the logical line, remember where the non-blank
870 data starts. Otherwise shuffle down continuation lines to remove leading
871 white space. */
872
873 if (len == 0)
874 startoffset = ss - big_buffer;
875 else
876 {
877 s = big_buffer + len;
878 if (ss > s)
879 {
880 memmove(s, ss, (newlen - len) - (ss - s) + 1);
881 newlen -= ss - s;
882 }
883 }
884
885 /* Accept the new addition to the line. Remove trailing white space. */
886
887 len = newlen;
888 while (len > 0 && isspace(big_buffer[len-1])) len--;
889 big_buffer[len] = 0;
890
891 /* We are done if the line does not end in backslash and contains some data.
892 Empty logical lines are ignored. For continuations, remove the backslash and
893 go round the loop to read the continuation line. */
894
895 if (len > 0)
896 {
897 if (big_buffer[len-1] != '\\') break; /* End of logical line */
898 big_buffer[--len] = 0; /* Remove backslash */
899 }
900 } /* Loop for reading multiple physical lines */
901
902/* We now have a logical line. Test for the end of a configuration section (or,
903more accurately, for the start of the next section). Place the name of the next
904section in next_section, and return NULL. If the name given is longer than
905next_section, truncate it. It will be unrecognized later, because all the known
906section names do fit. Leave space for pluralizing. */
907
908s = big_buffer + startoffset; /* First non-space character */
909if (strncmpic(s, US"begin ", 6) == 0)
910 {
911 s += 6;
912 while (isspace(*s)) s++;
913 if (big_buffer + len - s > sizeof(next_section) - 2)
914 s[sizeof(next_section) - 2] = 0;
915 Ustrcpy(next_section, s);
916 return NULL;
917 }
918
919/* Return the first non-blank character. */
920
921return s;
922}
923
924
925
926/*************************************************
927* Read a name *
928*************************************************/
929
930/* The yield is the pointer to the next uschar. Names longer than the
931output space are silently truncated. This function is also used from acl.c when
932parsing ACLs.
933
934Arguments:
935 name where to put the name
936 len length of name
937 s input pointer
938
939Returns: new input pointer
940*/
941
942uschar *
943readconf_readname(uschar *name, int len, uschar *s)
944{
945int p = 0;
946while (isspace(*s)) s++;
947if (isalpha(*s))
948 {
949 while (isalnum(*s) || *s == '_')
950 {
951 if (p < len-1) name[p++] = *s;
952 s++;
953 }
954 }
955name[p] = 0;
956while (isspace(*s)) s++;
957return s;
958}
959
960
961
962
963/*************************************************
964* Read a time value *
965*************************************************/
966
967/* This function is also called from outside, to read argument
968time values. The format of a time value is:
969
970 [<n>w][<n>d][<n>h][<n>m][<n>s]
971
972as long as at least one is present. If a format error is encountered,
973return a negative value. The value must be terminated by the given
974terminator.
975
976Arguments:
977 s input pointer
978 terminator required terminating character
979 return_msec if TRUE, allow fractional seconds and return milliseconds
980
981Returns: the time value, or -1 on syntax error
982 value is seconds if return_msec is FALSE
983 value is milliseconds if return_msec is TRUE
984*/
985
986int
987readconf_readtime(uschar *s, int terminator, BOOL return_msec)
988{
989int yield = 0;
990for (;;)
991 {
992 int value, count;
993 double fraction;
994
995 if (!isdigit(*s)) return -1;
996 (void)sscanf(CS s, "%d%n", &value, &count);
997 s += count;
998
999 switch (*s)
1000 {
1001 case 'w': value *= 7;
1002 case 'd': value *= 24;
1003 case 'h': value *= 60;
1004 case 'm': value *= 60;
1005 case 's': s++;
1006 break;
1007
1008 case '.':
1009 if (!return_msec) return -1;
1010 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1011 s += count;
1012 if (*s++ != 's') return -1;
1013 yield += (int)(fraction * 1000.0);
1014 break;
1015
1016 default: return -1;
1017 }
1018
1019 if (return_msec) value *= 1000;
1020 yield += value;
1021 if (*s == terminator) return yield;
1022 }
1023/* Control never reaches here. */
1024}
1025
1026
1027
1028/*************************************************
1029* Read a fixed point value *
1030*************************************************/
1031
1032/* The value is returned *1000
1033
1034Arguments:
1035 s input pointer
1036 terminator required terminator
1037
1038Returns: the value, or -1 on error
1039*/
1040
1041static int
1042readconf_readfixed(uschar *s, int terminator)
1043{
1044int yield = 0;
1045int value, count;
1046if (!isdigit(*s)) return -1;
1047(void)sscanf(CS s, "%d%n", &value, &count);
1048s += count;
1049yield = value * 1000;
1050if (*s == '.')
1051 {
1052 int m = 100;
1053 while (isdigit((*(++s))))
1054 {
1055 yield += (*s - '0') * m;
1056 m /= 10;
1057 }
1058 }
1059
1060return (*s == terminator)? yield : (-1);
1061}
1062
1063
1064
1065/*************************************************
1066* Find option in list *
1067*************************************************/
1068
1069/* The lists are always in order, so binary chop can be used.
1070
1071Arguments:
1072 name the option name to search for
1073 ol the first entry in the option list
1074 last one more than the offset of the last entry in the option list
1075
1076Returns: pointer to an option entry, or NULL if not found
1077*/
1078
1079static optionlist *
1080find_option(uschar *name, optionlist *ol, int last)
1081{
1082int first = 0;
1083while (last > first)
1084 {
1085 int middle = (first + last)/2;
1086 int c = Ustrcmp(name, ol[middle].name);
1087 if (c == 0) return ol + middle;
1088 else if (c > 0) first = middle + 1;
1089 else last = middle;
1090 }
1091return NULL;
1092}
1093
1094
1095
1096/*************************************************
1097* Find a set flag in option list *
1098*************************************************/
1099
1100/* Because some versions of Unix make no restrictions on the values of uids and
1101gids (even negative ones), we cannot represent "unset" by a special value.
1102There is therefore a separate boolean variable for each one indicating whether
1103a value is set or not. This function returns a pointer to the boolean, given
1104the original option name. It is a major disaster if the flag cannot be found.
1105
1106Arguments:
1107 name the name of the uid or gid option
1108 oltop points to the start of the relevant option list
1109 last one more than the offset of the last item in the option list
1110 data_block NULL when reading main options => data values in the option
1111 list are absolute addresses; otherwise they are byte offsets
1112 in data_block (used for driver options)
1113
1114Returns: a pointer to the boolean flag.
1115*/
1116
1117static BOOL *
1118get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1119{
1120optionlist *ol;
1121uschar name2[64];
1122sprintf(CS name2, "*set_%.50s", name);
1123ol = find_option(name2, oltop, last);
1124if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1125 "Exim internal error: missing set flag for %s", name);
1126return (data_block == NULL)? (BOOL *)(ol->value) :
1127 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1128}
1129
1130
1131
1132
1133/*************************************************
1134* Output extra characters message and die *
1135*************************************************/
1136
1137/* Called when an option line has junk on the end. Sometimes this is because
1138the sysadmin thinks comments are permitted.
1139
1140Arguments:
1141 s points to the extra characters
1142 t1..t3 strings to insert in the log message
1143
1144Returns: doesn't return; dies
1145*/
1146
1147static void
1148extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1149{
1150uschar *comment = US"";
1151if (*s == '#') comment = US" (# is comment only at line start)";
1152log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1153 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1154}
1155
1156
1157
1158/*************************************************
1159* Read rewrite information *
1160*************************************************/
1161
1162/* Each line of rewrite information contains:
1163
1164. A complete address in the form user@domain, possibly with
1165 leading * for each part; or alternatively, a regex.
1166
1167. A replacement string (which will be expanded).
1168
1169. An optional sequence of one-letter flags, indicating which
1170 headers etc. to apply this rule to.
1171
1172All this is decoded and placed into a control block. The OR of the flags is
1173maintained in a common word.
1174
1175Arguments:
1176 p points to the string that makes up the rule
1177 existflags points to the overall flag word
1178 isglobal TRUE if reading global rewrite rules
1179
1180Returns: the control block for the parsed rule.
1181*/
1182
1183static rewrite_rule *
1184readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1185{
1186rewrite_rule *next = store_get(sizeof(rewrite_rule));
1187
1188next->next = NULL;
1189next->key = string_dequote(&p);
1190
1191while (isspace(*p)) p++;
1192if (*p == 0)
1193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1194 "missing rewrite replacement string");
1195
1196next->flags = 0;
1197next->replacement = string_dequote(&p);
1198
1199while (*p != 0) switch (*p++)
1200 {
1201 case ' ': case '\t': break;
1202
1203 case 'q': next->flags |= rewrite_quit; break;
1204 case 'w': next->flags |= rewrite_whole; break;
1205
1206 case 'h': next->flags |= rewrite_all_headers; break;
1207 case 's': next->flags |= rewrite_sender; break;
1208 case 'f': next->flags |= rewrite_from; break;
1209 case 't': next->flags |= rewrite_to; break;
1210 case 'c': next->flags |= rewrite_cc; break;
1211 case 'b': next->flags |= rewrite_bcc; break;
1212 case 'r': next->flags |= rewrite_replyto; break;
1213
1214 case 'E': next->flags |= rewrite_all_envelope; break;
1215 case 'F': next->flags |= rewrite_envfrom; break;
1216 case 'T': next->flags |= rewrite_envto; break;
1217
1218 case 'Q': next->flags |= rewrite_qualify; break;
1219 case 'R': next->flags |= rewrite_repeat; break;
1220
1221 case 'S':
1222 next->flags |= rewrite_smtp;
1223 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1224 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1225 "rewrite rule has the S flag but is not a regular expression");
1226 break;
1227
1228 default:
1229 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1230 "unknown rewrite flag character '%c' "
1231 "(could be missing quotes round replacement item)", p[-1]);
1232 break;
1233 }
1234
1235/* If no action flags are set, set all the "normal" rewrites. */
1236
1237if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1238 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1239
1240/* Remember which exist, for optimization, and return the rule */
1241
1242*existflags |= next->flags;
1243return next;
1244}
1245
1246
1247
1248
1249/*************************************************
1250* Read global rewrite information *
1251*************************************************/
1252
1253/* Each line is a single rewrite rule; it is parsed into a control block
1254by readconf_one_rewrite(), and its flags are ORed into the global flag
1255word rewrite_existflags. */
1256
1257void
1258readconf_rewrites(void)
1259{
1260rewrite_rule **chain = &global_rewrite_rules;
1261uschar *p;
1262
1263while ((p = get_config_line()) != NULL)
1264 {
1265 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1266 *chain = next;
1267 chain = &(next->next);
1268 }
1269}
1270
1271
1272
1273/*************************************************
1274* Read a string *
1275*************************************************/
1276
1277/* Strings are read into the normal store pool. As long we aren't too
1278near the end of the current block, the string will just use what is necessary
1279on the top of the stacking pool, because string_cat() uses the extension
1280mechanism.
1281
1282Argument:
1283 s the rest of the input line
1284 name the option name (for errors)
1285
1286Returns: pointer to the string
1287*/
1288
1289static uschar *
1290read_string(uschar *s, uschar *name)
1291{
1292uschar *yield;
1293uschar *ss;
1294
1295if (*s != '\"') return string_copy(s);
1296
1297ss = s;
1298yield = string_dequote(&s);
1299
1300if (s == ss+1 || s[-1] != '\"')
1301 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1302 "missing quote at end of string value for %s", name);
1303
1304if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1305
1306return yield;
1307}
1308
1309
1310/*************************************************
1311* Handle option line *
1312*************************************************/
1313
1314/* This function is called from several places to process a line containing the
1315setting of an option. The first argument is the line to be decoded; it has been
1316checked not to be empty and not to start with '#'. Trailing newlines and white
1317space have been removed. The second argument is a pointer to the list of
1318variable names that are to be recognized, together with their types and
1319locations, and the third argument gives the number of entries in the list.
1320
1321The fourth argument is a pointer to a data block. If it is NULL, then the data
1322values in the options list are absolute addresses. Otherwise, they are byte
1323offsets in the data block.
1324
1325String option data may continue onto several lines; this function reads further
1326data from config_file if necessary.
1327
1328The yield of this function is normally zero. If a string continues onto
1329multiple lines, then the data value is permitted to be followed by a comma
1330or a semicolon (for use in drivers) and the yield is that character.
1331
1332Arguments:
1333 buffer contains the configuration line to be handled
1334 oltop points to the start of the relevant option list
1335 last one more than the offset of the last item in the option list
1336 data_block NULL when reading main options => data values in the option
1337 list are absolute addresses; otherwise they are byte offsets
1338 in data_block when they have opt_public set; otherwise
1339 they are byte offsets in data_block->options_block.
1340 unknown_txt format string to use in panic message for unknown option;
1341 must contain %s for option name
1342 if given as NULL, don't panic on unknown option
1343
1344Returns: TRUE if an option was read successfully,
1345 FALSE false for an unknown option if unknown_txt == NULL,
1346 otherwise panic and die on an unknown option
1347*/
1348
1349static BOOL
1350readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1351 void *data_block, uschar *unknown_txt)
1352{
1353int ptr = 0;
1354int offset = 0;
1355int n, count, type, value;
1356int issecure = 0;
1357uid_t uid;
1358gid_t gid;
1359BOOL boolvalue = TRUE;
1360BOOL freesptr = TRUE;
532be449 1361BOOL extra_condition = FALSE;
059ec3d9
PH
1362optionlist *ol, *ol2;
1363struct passwd *pw;
1364void *reset_point;
1365int intbase = 0;
1366uschar *inttype = US"";
1367uschar *sptr;
1368uschar *s = buffer;
532be449
PP
1369uschar *saved_condition, *strtemp;
1370uschar **str_target;
059ec3d9
PH
1371uschar name[64];
1372uschar name2[64];
1373
1374/* There may be leading spaces; thereafter, we expect an option name starting
1375with a letter. */
1376
1377while (isspace(*s)) s++;
1378if (!isalpha(*s))
1379 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1380
1381/* Read the name of the option, and skip any subsequent white space. If
1382it turns out that what we read was "hide", set the flag indicating that
1383this is a secure option, and loop to read the next word. */
1384
1385for (n = 0; n < 2; n++)
1386 {
1387 while (isalnum(*s) || *s == '_')
1388 {
1389 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1390 s++;
1391 }
1392 name[ptr] = 0;
1393 while (isspace(*s)) s++;
1394 if (Ustrcmp(name, "hide") != 0) break;
1395 issecure = opt_secure;
1396 ptr = 0;
1397 }
1398
1399/* Deal with "no_" or "not_" here for booleans */
1400
1401if (Ustrncmp(name, "no_", 3) == 0)
1402 {
1403 boolvalue = FALSE;
1404 offset = 3;
1405 }
1406
1407if (Ustrncmp(name, "not_", 4) == 0)
1408 {
1409 boolvalue = FALSE;
1410 offset = 4;
1411 }
1412
1413/* Search the list for the given name. A non-existent name, or an option that
1414is set twice, is a disaster. */
1415
1416ol = find_option(name + offset, oltop, last);
1417
1418if (ol == NULL)
1419 {
1420 if (unknown_txt == NULL) return FALSE;
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1422 }
1423
1424if ((ol->type & opt_set) != 0)
1425 {
1426 uschar *mname = name;
1427 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
532be449
PP
1428 if (Ustrcmp(mname, "condition") == 0)
1429 extra_condition = TRUE;
1430 else
1431 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1432 "\"%s\" option set for the second time", mname);
059ec3d9
PH
1433 }
1434
1435ol->type |= opt_set | issecure;
1436type = ol->type & opt_mask;
1437
1438/* Types with data values must be followed by '='; the "no[t]_" prefix
1439applies only to boolean values. */
1440
1441if (type < opt_bool || type > opt_bool_last)
1442 {
1443 if (offset != 0)
1444 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1445 "negation prefix applied to a non-boolean option");
1446 if (*s == 0)
1447 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1448 "unexpected end of line (data missing) after %s", name);
1449 if (*s != '=')
1450 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1451 }
1452
1453/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1454true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1455ultimately expands to one of those values. */
1456
1457else if (*s != 0 && (offset != 0 || *s != '='))
1458 extra_chars_error(s, US"boolean option ", name, US"");
1459
1460/* Skip white space after = */
1461
1462if (*s == '=') while (isspace((*(++s))));
1463
1464/* If there is a data block and the opt_public flag is not set, change
1465the data block pointer to the private options block. */
1466
1467if (data_block != NULL && (ol->type & opt_public) == 0)
1468 data_block = (void *)(((driver_instance *)data_block)->options_block);
1469
1470/* Now get the data according to the type. */
1471
1472switch (type)
1473 {
1474 /* If a string value is not enclosed in quotes, it consists of
1475 the rest of the current line, verbatim. Otherwise, string escapes
1476 are processed.
1477
1478 A transport is specified as a string, which is then looked up in the
1479 list of transports. A search type is specified as one of a number of
1480 known strings.
1481
1482 A set or rewrite rules for a driver is specified as a string, which is
1483 then parsed into a suitable chain of control blocks.
1484
1485 Uids and gids are specified as strings which are then looked up in the
1486 passwd file. Lists of uids and gids are similarly specified as colon-
1487 separated strings. */
1488
1489 case opt_stringptr:
1490 case opt_uid:
1491 case opt_gid:
1492 case opt_expand_uid:
1493 case opt_expand_gid:
1494 case opt_uidlist:
1495 case opt_gidlist:
1496 case opt_rewrite:
1497
1498 reset_point = sptr = read_string(s, name);
1499
1500 /* Having read a string, we now have several different ways of using it,
1501 depending on the data type, so do another switch. If keeping the actual
1502 string is not required (because it is interpreted), freesptr is set TRUE,
1503 and at the end we reset the pool. */
1504
1505 switch (type)
1506 {
1507 /* If this was a string, set the variable to point to the new string,
1508 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1509 rules, we still keep the string (for printing), and parse the rules into a
1510 control block and flags word. */
1511
1512 case opt_stringptr:
532be449
PP
1513 if (data_block == NULL)
1514 str_target = (uschar **)(ol->value);
1515 else
1516 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1517 if (extra_condition)
1518 {
1519 /* We already have a condition, we're conducting a crude hack to let multiple
1520 condition rules be chained together, despite storing them in text form. */
1521 saved_condition = *str_target;
1522 strtemp = string_sprintf("${if and{{bool{%s}}{bool{%s}}}}",
1523 saved_condition, sptr);
1524 *str_target = string_copy_malloc(strtemp);
1525 }
1526 else
1527 {
1528 *str_target = sptr;
1529 freesptr = FALSE;
1530 }
1531 break;
1532
059ec3d9
PH
1533 case opt_rewrite:
1534 if (data_block == NULL)
1535 *((uschar **)(ol->value)) = sptr;
1536 else
1537 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1538 freesptr = FALSE;
1539 if (type == opt_rewrite)
1540 {
1541 int sep = 0;
1542 int *flagptr;
1543 uschar *p = sptr;
1544 rewrite_rule **chain;
1545 optionlist *ol3;
1546
1547 sprintf(CS name2, "*%.50s_rules", name);
1548 ol2 = find_option(name2, oltop, last);
1549 sprintf(CS name2, "*%.50s_flags", name);
1550 ol3 = find_option(name2, oltop, last);
1551
1552 if (ol2 == NULL || ol3 == NULL)
1553 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1554 "rewrite rules not available for driver");
1555
1556 if (data_block == NULL)
1557 {
1558 chain = (rewrite_rule **)(ol2->value);
1559 flagptr = (int *)(ol3->value);
1560 }
1561 else
1562 {
1563 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1564 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1565 }
1566
1567 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1568 != NULL)
1569 {
1570 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1571 *chain = next;
1572 chain = &(next->next);
1573 }
1574
1575 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1576 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1577 "non-header rewrite - not allowed at transport time -");
1578 }
1579 break;
1580
1581 /* If it was an expanded uid, see if there is any expansion to be
1582 done by checking for the presence of a $ character. If there is, save it
1583 in the corresponding *expand_user option field. Otherwise, fall through
1584 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1585 of data. */
1586
1587 case opt_expand_uid:
1588 sprintf(CS name2, "*expand_%.50s", name);
1589 ol2 = find_option(name2, oltop, last);
1590 if (ol2 != NULL)
1591 {
1592 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1593
1594 if (data_block == NULL)
1595 *((uschar **)(ol2->value)) = ss;
1596 else
1597 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1598
1599 if (ss != NULL)
1600 {
1601 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1602 freesptr = FALSE;
1603 break;
1604 }
1605 }
1606
1607 /* Look up a fixed uid, and also make use of the corresponding gid
1608 if a passwd entry is returned and the gid has not been set. */
1609
1610 case opt_uid:
1611 if (!route_finduser(sptr, &pw, &uid))
1612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1613 if (data_block == NULL)
1614 *((uid_t *)(ol->value)) = uid;
1615 else
1616 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1617
1618 /* Set the flag indicating a fixed value is set */
1619
1620 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1621
1622 /* Handle matching gid if we have a passwd entry: done by finding the
1623 same name with terminating "user" changed to "group"; if not found,
1624 ignore. Also ignore if the value is already set. */
1625
1626 if (pw == NULL) break;
1627 Ustrcpy(name+Ustrlen(name)-4, "group");
1628 ol2 = find_option(name, oltop, last);
1629 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1630 (ol2->type & opt_mask) == opt_expand_gid))
1631 {
1632 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1633 if (! *set_flag)
1634 {
1635 if (data_block == NULL)
1636 *((gid_t *)(ol2->value)) = pw->pw_gid;
1637 else
1638 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1639 *set_flag = TRUE;
1640 }
1641 }
1642 break;
1643
1644 /* If it was an expanded gid, see if there is any expansion to be
1645 done by checking for the presence of a $ character. If there is, save it
1646 in the corresponding *expand_user option field. Otherwise, fall through
1647 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1648 of data. */
1649
1650 case opt_expand_gid:
1651 sprintf(CS name2, "*expand_%.50s", name);
1652 ol2 = find_option(name2, oltop, last);
1653 if (ol2 != NULL)
1654 {
1655 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1656
1657 if (data_block == NULL)
1658 *((uschar **)(ol2->value)) = ss;
1659 else
1660 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1661
1662 if (ss != NULL)
1663 {
1664 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1665 freesptr = FALSE;
1666 break;
1667 }
1668 }
1669
1670 /* Handle freestanding gid */
1671
1672 case opt_gid:
1673 if (!route_findgroup(sptr, &gid))
1674 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1675 if (data_block == NULL)
1676 *((gid_t *)(ol->value)) = gid;
1677 else
1678 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1679 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1680 break;
1681
1682 /* If it was a uid list, look up each individual entry, and build
1683 a vector of uids, with a count in the first element. Put the vector
1684 in malloc store so we can free the string. (We are reading into
1685 permanent store already.) */
1686
1687 case opt_uidlist:
1688 {
1689 int count = 1;
1690 uid_t *list;
1691 int ptr = 0;
0925ede6
PH
1692 uschar *p;
1693 uschar *op = expand_string (sptr);
1694
1695 if (op == NULL)
1696 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1697 name, expand_string_message);
059ec3d9 1698
0925ede6 1699 p = op;
059ec3d9 1700 if (*p != 0) count++;
0925ede6 1701 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1702 list = store_malloc(count*sizeof(uid_t));
1703 list[ptr++] = (uid_t)(count - 1);
1704
1705 if (data_block == NULL)
1706 *((uid_t **)(ol->value)) = list;
1707 else
1708 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1709
0925ede6 1710 p = op;
059ec3d9
PH
1711 while (count-- > 1)
1712 {
1713 int sep = 0;
1714 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1715 if (!route_finduser(big_buffer, NULL, &uid))
1716 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1717 big_buffer);
1718 list[ptr++] = uid;
1719 }
1720 }
1721 break;
1722
1723 /* If it was a gid list, look up each individual entry, and build
1724 a vector of gids, with a count in the first element. Put the vector
1725 in malloc store so we can free the string. (We are reading into permanent
1726 store already.) */
1727
1728 case opt_gidlist:
1729 {
1730 int count = 1;
1731 gid_t *list;
1732 int ptr = 0;
0925ede6
PH
1733 uschar *p;
1734 uschar *op = expand_string (sptr);
1735
1736 if (op == NULL)
1737 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1738 name, expand_string_message);
059ec3d9 1739
0925ede6 1740 p = op;
059ec3d9 1741 if (*p != 0) count++;
0925ede6 1742 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1743 list = store_malloc(count*sizeof(gid_t));
1744 list[ptr++] = (gid_t)(count - 1);
1745
1746 if (data_block == NULL)
1747 *((gid_t **)(ol->value)) = list;
1748 else
1749 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1750
0925ede6 1751 p = op;
059ec3d9
PH
1752 while (count-- > 1)
1753 {
1754 int sep = 0;
1755 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1756 if (!route_findgroup(big_buffer, &gid))
1757 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1758 big_buffer);
1759 list[ptr++] = gid;
1760 }
1761 }
1762 break;
1763 }
1764
1765 /* Release store if the value of the string doesn't need to be kept. */
1766
1767 if (freesptr) store_reset(reset_point);
1768 break;
1769
1770 /* Expanded boolean: if no characters follow, or if there are no dollar
1771 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1772 save the string for later expansion in the alternate place. */
1773
1774 case opt_expand_bool:
1775 if (*s != 0 && Ustrchr(s, '$') != 0)
1776 {
1777 sprintf(CS name2, "*expand_%.50s", name);
1778 ol2 = find_option(name2, oltop, last);
1779 if (ol2 != NULL)
1780 {
1781 reset_point = sptr = read_string(s, name);
1782 if (data_block == NULL)
1783 *((uschar **)(ol2->value)) = sptr;
1784 else
1785 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1786 freesptr = FALSE;
1787 break;
1788 }
1789 }
1790 /* Fall through */
1791
1792 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1793 look for yes/not/true/false. Some booleans are stored in a single bit in
1794 a single int. There's a special fudge for verify settings; without a suffix
1795 they set both xx_sender and xx_recipient. The table points to the sender
1796 value; search subsequently for the recipient. There's another special case:
1797 opt_bool_set also notes when a boolean has been set. */
1798
1799 case opt_bool:
1800 case opt_bit:
1801 case opt_bool_verify:
1802 case opt_bool_set:
1803 if (*s != 0)
1804 {
1805 s = readconf_readname(name2, 64, s);
1806 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1807 boolvalue = TRUE;
1808 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1809 boolvalue = FALSE;
1810 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1811 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1812 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1813 US"for boolean option ", name);
1814 }
1815
1816 /* Handle single-bit type. */
1817
1818 if (type == opt_bit)
1819 {
1820 int bit = 1 << ((ol->type >> 16) & 31);
1821 int *ptr = (data_block == NULL)?
1822 (int *)(ol->value) :
1823 (int *)((uschar *)data_block + (long int)ol->value);
1824 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1825 break;
1826 }
1827
1828 /* Handle full BOOL types */
1829
1830 if (data_block == NULL)
1831 *((BOOL *)(ol->value)) = boolvalue;
1832 else
1833 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1834
1835 /* Verify fudge */
1836
1837 if (type == opt_bool_verify)
1838 {
1839 sprintf(CS name2, "%.50s_recipient", name + offset);
1840 ol2 = find_option(name2, oltop, last);
1841 if (ol2 != NULL)
1842 {
1843 if (data_block == NULL)
1844 *((BOOL *)(ol2->value)) = boolvalue;
1845 else
1846 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1847 }
1848 }
1849
1850 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1851
1852 else if (type == opt_bool_set)
1853 {
1854 sprintf(CS name2, "*set_%.50s", name + offset);
1855 ol2 = find_option(name2, oltop, last);
1856 if (ol2 != NULL)
1857 {
1858 if (data_block == NULL)
1859 *((BOOL *)(ol2->value)) = TRUE;
1860 else
1861 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1862 }
1863 }
1864 break;
1865
1866 /* Octal integer */
1867
1868 case opt_octint:
1869 intbase = 8;
1870 inttype = US"octal ";
1871
1872 /* Integer: a simple(ish) case; allow octal and hex formats, and
1873 suffixes K and M. The different types affect output, not input. */
1874
1875 case opt_mkint:
1876 case opt_int:
1877 {
1878 uschar *endptr;
7e8d92ba
PH
1879 long int lvalue;
1880
059ec3d9 1881 errno = 0;
7e8d92ba 1882 lvalue = strtol(CS s, CSS &endptr, intbase);
059ec3d9
PH
1883
1884 if (endptr == s)
1885 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1886 inttype, name);
1887
1888 if (errno != ERANGE)
1889 {
1890 if (tolower(*endptr) == 'k')
1891 {
7e8d92ba
PH
1892 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1893 else lvalue *= 1024;
059ec3d9
PH
1894 endptr++;
1895 }
1896 else if (tolower(*endptr) == 'm')
1897 {
7e8d92ba 1898 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
059ec3d9 1899 errno = ERANGE;
7e8d92ba 1900 else lvalue *= 1024*1024;
059ec3d9
PH
1901 endptr++;
1902 }
1903 }
1904
7e8d92ba
PH
1905 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1906 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1907 "absolute value of integer \"%s\" is too large (overflow)", s);
059ec3d9
PH
1908
1909 while (isspace(*endptr)) endptr++;
1910 if (*endptr != 0)
1911 extra_chars_error(endptr, inttype, US"integer value for ", name);
7e8d92ba
PH
1912
1913 value = (int)lvalue;
059ec3d9
PH
1914 }
1915
1916 if (data_block == NULL)
1917 *((int *)(ol->value)) = value;
1918 else
1919 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1920 break;
1921
1922 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1923 M. */
1924
1925 case opt_Kint:
1926 {
1927 uschar *endptr;
1928 errno = 0;
1929 value = strtol(CS s, CSS &endptr, intbase);
1930
1931 if (endptr == s)
1932 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1933 inttype, name);
1934
1935 if (errno != ERANGE)
1936 {
1937 if (tolower(*endptr) == 'm')
1938 {
1939 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1940 else value *= 1024;
1941 endptr++;
1942 }
1943 else if (tolower(*endptr) == 'k')
1944 {
1945 endptr++;
1946 }
1947 else
1948 {
1949 value = (value + 512)/1024;
1950 }
1951 }
1952
1953 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1954 "absolute value of integer \"%s\" is too large (overflow)", s);
1955
1956 while (isspace(*endptr)) endptr++;
1957 if (*endptr != 0)
1958 extra_chars_error(endptr, inttype, US"integer value for ", name);
1959 }
1960
1961 if (data_block == NULL)
1962 *((int *)(ol->value)) = value;
1963 else
1964 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1965 break;
1966
1967 /* Fixed-point number: held to 3 decimal places. */
1968
1969 case opt_fixed:
1970 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1971 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1972 "fixed-point number expected for %s", name);
1973
1974 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1975 "integer \"%s\" is too large (overflow)", s);
1976
1977 value *= 1000;
1978
1979 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1980 "integer \"%s\" is too large (overflow)", s);
1981
1982 if (s[count] == '.')
1983 {
1984 int d = 100;
1985 while (isdigit(s[++count]))
1986 {
1987 value += (s[count] - '0') * d;
1988 d /= 10;
1989 }
1990 }
1991
1992 while (isspace(s[count])) count++;
1993
1994 if (s[count] != 0)
1995 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1996
1997 if (data_block == NULL)
1998 *((int *)(ol->value)) = value;
1999 else
2000 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2001 break;
2002
2003 /* There's a special routine to read time values. */
2004
2005 case opt_time:
2006 value = readconf_readtime(s, 0, FALSE);
2007 if (value < 0)
2008 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2009 name);
2010 if (data_block == NULL)
2011 *((int *)(ol->value)) = value;
2012 else
2013 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2014 break;
2015
2016 /* A time list is a list of colon-separated times, with the first
2017 element holding the size of the list and the second the number of
2018 entries used. */
2019
2020 case opt_timelist:
2021 {
2022 int count = 0;
2023 int *list = (data_block == NULL)?
2024 (int *)(ol->value) :
2025 (int *)((uschar *)data_block + (long int)(ol->value));
2026
2027 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2028 {
2029 int terminator = 0;
2030 uschar *snext = Ustrchr(s, ':');
2031 if (snext != NULL)
2032 {
2033 uschar *ss = snext;
2034 while (ss > s && isspace(ss[-1])) ss--;
2035 terminator = *ss;
2036 }
2037 value = readconf_readtime(s, terminator, FALSE);
2038 if (value < 0)
2039 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2040 name);
2041 if (count > 1 && value <= list[count])
2042 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2043 "time value out of order for %s", name);
2044 list[count+1] = value;
2045 if (snext == NULL) break;
2046 s = snext + 1;
2047 while (isspace(*s)) s++;
2048 }
2049
2050 if (count > list[0] - 2)
2051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2052 name);
2053 if (count > 0 && list[2] == 0) count = 0;
2054 list[1] = count;
2055 }
2056
2057 break;
2058 }
2059
2060return TRUE;
2061}
2062
2063
2064
2065/*************************************************
2066* Print a time value *
2067*************************************************/
2068
2069/*
2070Argument: a time value in seconds
2071Returns: pointer to a fixed buffer containing the time as a string,
2072 in readconf_readtime() format
2073*/
2074
2075uschar *
2076readconf_printtime(int t)
2077{
2078int s, m, h, d, w;
2079uschar *p = time_buffer;
2080
ea49d0e1
PH
2081if (t < 0)
2082 {
2083 *p++ = '-';
2084 t = -t;
2085 }
2086
059ec3d9
PH
2087s = t % 60;
2088t /= 60;
2089m = t % 60;
2090t /= 60;
2091h = t % 24;
2092t /= 24;
2093d = t % 7;
2094w = t/7;
2095
2096if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2097if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2098if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2099if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2100if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2101
2102return time_buffer;
2103}
2104
2105
2106
2107/*************************************************
2108* Print an individual option value *
2109*************************************************/
2110
2111/* This is used by the -bP option, so prints to the standard output.
2112The entire options list is passed in as an argument, because some options come
2113in pairs - typically uid/gid settings, which can either be explicit numerical
2114values, or strings to be expanded later. If the numerical value is unset,
2115search for "*expand_<name>" to see if there is a string equivalent.
2116
2117Arguments:
2118 ol option entry, or NULL for an unknown option
2119 name option name
2120 options_block NULL for main configuration options; otherwise points to
2121 a driver block; if the option doesn't have opt_public
2122 set, then options_block->options_block is where the item
2123 resides.
2124 oltop points to the option list in which ol exists
2125 last one more than the offset of the last entry in optop
2126
2127Returns: nothing
2128*/
2129
2130static void
2131print_ol(optionlist *ol, uschar *name, void *options_block,
2132 optionlist *oltop, int last)
2133{
2134struct passwd *pw;
2135struct group *gr;
2136optionlist *ol2;
2137void *value;
2138uid_t *uidlist;
2139gid_t *gidlist;
2140uschar *s;
2141uschar name2[64];
2142
2143if (ol == NULL)
2144 {
2145 printf("%s is not a known option\n", name);
2146 return;
2147 }
2148
2149/* Non-admin callers cannot see options that have been flagged secure by the
2150"hide" prefix. */
2151
2152if (!admin_user && (ol->type & opt_secure) != 0)
2153 {
2154 printf("%s = <value not displayable>\n", name);
2155 return;
2156 }
2157
2158/* Else show the value of the option */
2159
2160value = ol->value;
2161if (options_block != NULL)
2162 {
2163 if ((ol->type & opt_public) == 0)
2164 options_block = (void *)(((driver_instance *)options_block)->options_block);
2165 value = (void *)((uschar *)options_block + (long int)value);
2166 }
2167
2168switch(ol->type & opt_mask)
2169 {
2170 case opt_stringptr:
2171 case opt_rewrite: /* Show the text value */
2172 s = *((uschar **)value);
2173 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2174 break;
2175
2176 case opt_int:
2177 printf("%s = %d\n", name, *((int *)value));
2178 break;
2179
2180 case opt_mkint:
2181 {
2182 int x = *((int *)value);
2183 if (x != 0 && (x & 1023) == 0)
2184 {
2185 int c = 'K';
2186 x >>= 10;
2187 if ((x & 1023) == 0)
2188 {
2189 c = 'M';
2190 x >>= 10;
2191 }
2192 printf("%s = %d%c\n", name, x, c);
2193 }
2194 else printf("%s = %d\n", name, x);
2195 }
2196 break;
2197
2198 case opt_Kint:
2199 {
2200 int x = *((int *)value);
2201 if (x == 0) printf("%s = 0\n", name);
2202 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2203 else printf("%s = %dK\n", name, x);
2204 }
2205 break;
2206
2207 case opt_octint:
2208 printf("%s = %#o\n", name, *((int *)value));
2209 break;
2210
2211 /* Can be negative only when "unset", in which case integer */
2212
2213 case opt_fixed:
2214 {
2215 int x = *((int *)value);
2216 int f = x % 1000;
2217 int d = 100;
2218 if (x < 0) printf("%s =\n", name); else
2219 {
2220 printf("%s = %d.", name, x/1000);
2221 do
2222 {
2223 printf("%d", f/d);
2224 f %= d;
2225 d /= 10;
2226 }
2227 while (f != 0);
2228 printf("\n");
2229 }
2230 }
2231 break;
2232
2233 /* If the numerical value is unset, try for the string value */
2234
2235 case opt_expand_uid:
2236 if (! *get_set_flag(name, oltop, last, options_block))
2237 {
2238 sprintf(CS name2, "*expand_%.50s", name);
2239 ol2 = find_option(name2, oltop, last);
2240 if (ol2 != NULL)
2241 {
2242 void *value2 = ol2->value;
2243 if (options_block != NULL)
2244 value2 = (void *)((uschar *)options_block + (long int)value2);
2245 s = *((uschar **)value2);
2246 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2247 break;
2248 }
2249 }
2250
2251 /* Else fall through */
2252
2253 case opt_uid:
2254 if (! *get_set_flag(name, oltop, last, options_block))
2255 printf("%s =\n", name);
2256 else
2257 {
2258 pw = getpwuid(*((uid_t *)value));
2259 if (pw == NULL)
2260 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2261 else printf("%s = %s\n", name, pw->pw_name);
2262 }
2263 break;
2264
2265 /* If the numerical value is unset, try for the string value */
2266
2267 case opt_expand_gid:
2268 if (! *get_set_flag(name, oltop, last, options_block))
2269 {
2270 sprintf(CS name2, "*expand_%.50s", name);
2271 ol2 = find_option(name2, oltop, last);
2272 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2273 {
2274 void *value2 = ol2->value;
2275 if (options_block != NULL)
2276 value2 = (void *)((uschar *)options_block + (long int)value2);
2277 s = *((uschar **)value2);
2278 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2279 break;
2280 }
2281 }
2282
2283 /* Else fall through */
2284
2285 case opt_gid:
2286 if (! *get_set_flag(name, oltop, last, options_block))
2287 printf("%s =\n", name);
2288 else
2289 {
2290 gr = getgrgid(*((int *)value));
2291 if (gr == NULL)
2292 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2293 else printf("%s = %s\n", name, gr->gr_name);
2294 }
2295 break;
2296
2297 case opt_uidlist:
2298 uidlist = *((uid_t **)value);
2299 printf("%s =", name);
2300 if (uidlist != NULL)
2301 {
2302 int i;
2303 uschar sep = ' ';
2304 for (i = 1; i <= (int)(uidlist[0]); i++)
2305 {
2306 uschar *name = NULL;
2307 pw = getpwuid(uidlist[i]);
2308 if (pw != NULL) name = US pw->pw_name;
2309 if (name != NULL) printf("%c%s", sep, name);
2310 else printf("%c%ld", sep, (long int)(uidlist[i]));
2311 sep = ':';
2312 }
2313 }
2314 printf("\n");
2315 break;
2316
2317 case opt_gidlist:
2318 gidlist = *((gid_t **)value);
2319 printf("%s =", name);
2320 if (gidlist != NULL)
2321 {
2322 int i;
2323 uschar sep = ' ';
2324 for (i = 1; i <= (int)(gidlist[0]); i++)
2325 {
2326 uschar *name = NULL;
2327 gr = getgrgid(gidlist[i]);
2328 if (gr != NULL) name = US gr->gr_name;
2329 if (name != NULL) printf("%c%s", sep, name);
2330 else printf("%c%ld", sep, (long int)(gidlist[i]));
2331 sep = ':';
2332 }
2333 }
2334 printf("\n");
2335 break;
2336
2337 case opt_time:
2338 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2339 break;
2340
2341 case opt_timelist:
2342 {
2343 int i;
2344 int *list = (int *)value;
2345 printf("%s = ", name);
2346 for (i = 0; i < list[1]; i++)
2347 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2348 printf("\n");
2349 }
2350 break;
2351
2352 case opt_bit:
2353 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2354 "" : "no_", name);
2355 break;
2356
2357 case opt_expand_bool:
2358 sprintf(CS name2, "*expand_%.50s", name);
2359 ol2 = find_option(name2, oltop, last);
2360 if (ol2 != NULL && ol2->value != NULL)
2361 {
2362 void *value2 = ol2->value;
2363 if (options_block != NULL)
2364 value2 = (void *)((uschar *)options_block + (long int)value2);
2365 s = *((uschar **)value2);
2366 if (s != NULL)
2367 {
2368 printf("%s = %s\n", name, string_printing(s));
2369 break;
2370 }
2371 /* s == NULL => string not set; fall through */
2372 }
2373
2374 /* Fall through */
2375
2376 case opt_bool:
2377 case opt_bool_verify:
2378 case opt_bool_set:
2379 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2380 break;
2381 }
2382}
2383
2384
2385
2386/*************************************************
2387* Print value from main configuration *
2388*************************************************/
2389
2390/* This function, called as a result of encountering the -bP option,
2391causes the value of any main configuration variable to be output if the
2392second argument is NULL. There are some special values:
2393
2394 all print all main configuration options
2395 configure_file print the name of the configuration file
2396 routers print the routers' configurations
2397 transports print the transports' configuration
2398 authenticators print the authenticators' configuration
5d9c27ec 2399 macros print the macros' configuration
059ec3d9
PH
2400 router_list print a list of router names
2401 transport_list print a list of transport names
2402 authenticator_list print a list of authentication mechanism names
5d9c27ec 2403 macro_list print a list of macro names
059ec3d9
PH
2404 +name print a named list item
2405 local_scan print the local_scan options
2406
5d9c27ec
TK
2407If the second argument is not NULL, it must be one of "router", "transport",
2408"authenticator" or "macro" in which case the first argument identifies the
2409driver whose options are to be printed.
059ec3d9
PH
2410
2411Arguments:
2412 name option name if type == NULL; else driver name
2413 type NULL or driver type name, as described above
2414
2415Returns: nothing
2416*/
2417
2418void
2419readconf_print(uschar *name, uschar *type)
2420{
2421BOOL names_only = FALSE;
2422optionlist *ol;
2423optionlist *ol2 = NULL;
2424driver_instance *d = NULL;
5d9c27ec 2425macro_item *m;
059ec3d9
PH
2426int size = 0;
2427
2428if (type == NULL)
2429 {
2430 if (*name == '+')
2431 {
2432 int i;
2433 tree_node *t;
2434 BOOL found = FALSE;
2435 static uschar *types[] = { US"address", US"domain", US"host",
2436 US"localpart" };
2437 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2438 &hostlist_anchor, &localpartlist_anchor };
2439
2440 for (i = 0; i < 4; i++)
2441 {
2442 t = tree_search(*(anchors[i]), name+1);
2443 if (t != NULL)
2444 {
2445 found = TRUE;
2446 printf("%slist %s = %s\n", types[i], name+1,
2447 ((namedlist_block *)(t->data.ptr))->string);
2448 }
2449 }
2450
2451 if (!found)
2452 printf("no address, domain, host, or local part list called \"%s\" "
2453 "exists\n", name+1);
2454
2455 return;
2456 }
2457
2458 if (Ustrcmp(name, "configure_file") == 0)
2459 {
2460 printf("%s\n", CS config_main_filename);
2461 return;
2462 }
2463
2464 if (Ustrcmp(name, "all") == 0)
2465 {
2466 for (ol = optionlist_config;
2467 ol < optionlist_config + optionlist_config_size; ol++)
2468 {
2469 if ((ol->type & opt_hidden) == 0)
2470 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2471 }
2472 return;
2473 }
2474
2475 if (Ustrcmp(name, "local_scan") == 0)
2476 {
2477 #ifndef LOCAL_SCAN_HAS_OPTIONS
2478 printf("local_scan() options are not supported\n");
2479 #else
2480 for (ol = local_scan_options;
2481 ol < local_scan_options + local_scan_options_count; ol++)
2482 {
2483 print_ol(ol, US ol->name, NULL, local_scan_options,
2484 local_scan_options_count);
2485 }
2486 #endif
2487 return;
2488 }
2489
2490 if (Ustrcmp(name, "routers") == 0)
2491 {
2492 type = US"router";
2493 name = NULL;
2494 }
2495 else if (Ustrcmp(name, "transports") == 0)
2496 {
2497 type = US"transport";
2498 name = NULL;
2499 }
2500
2501 else if (Ustrcmp(name, "authenticators") == 0)
2502 {
2503 type = US"authenticator";
2504 name = NULL;
2505 }
2506
5d9c27ec 2507 else if (Ustrcmp(name, "macros") == 0)
059ec3d9 2508 {
5d9c27ec 2509 type = US"macro";
059ec3d9 2510 name = NULL;
059ec3d9
PH
2511 }
2512
2513 else if (Ustrcmp(name, "router_list") == 0)
2514 {
2515 type = US"router";
2516 name = NULL;
2517 names_only = TRUE;
2518 }
5d9c27ec 2519
059ec3d9
PH
2520 else if (Ustrcmp(name, "transport_list") == 0)
2521 {
2522 type = US"transport";
2523 name = NULL;
2524 names_only = TRUE;
2525 }
5d9c27ec
TK
2526
2527 else if (Ustrcmp(name, "authenticator_list") == 0)
2528 {
2529 type = US"authenticator";
2530 name = NULL;
2531 names_only = TRUE;
2532 }
2533
2534 else if (Ustrcmp(name, "macro_list") == 0)
2535 {
2536 type = US"macro";
2537 name = NULL;
2538 names_only = TRUE;
2539 }
2540
059ec3d9
PH
2541 else
2542 {
2543 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2544 name, NULL, optionlist_config, optionlist_config_size);
2545 return;
2546 }
2547 }
2548
2549/* Handle the options for a router or transport. Skip options that are flagged
2550as hidden. Some of these are options with names starting with '*', used for
2551internal alternative representations of other options (which the printing
2552function will sort out). Others are synonyms kept for backward compatibility.
2553*/
2554
2555if (Ustrcmp(type, "router") == 0)
2556 {
2557 d = (driver_instance *)routers;
2558 ol2 = optionlist_routers;
2559 size = optionlist_routers_size;
2560 }
2561else if (Ustrcmp(type, "transport") == 0)
2562 {
2563 d = (driver_instance *)transports;
2564 ol2 = optionlist_transports;
2565 size = optionlist_transports_size;
2566 }
2567else if (Ustrcmp(type, "authenticator") == 0)
2568 {
2569 d = (driver_instance *)auths;
2570 ol2 = optionlist_auths;
2571 size = optionlist_auths_size;
2572 }
2573
5d9c27ec
TK
2574else if (Ustrcmp(type, "macro") == 0)
2575 {
2576 /* People store passwords in macros and they were previously not available
2577 for printing. So we have an admin_users restriction. */
2578 if (!admin_user)
2579 {
2580 fprintf(stderr, "exim: permission denied\n");
2581 exit(EXIT_FAILURE);
2582 }
2583 for (m = macros; m != NULL; m = m->next)
2584 {
2585 if (name == NULL || Ustrcmp(name, m->name) == 0)
2586 {
2587 if (names_only)
2588 printf("%s\n", CS m->name);
2589 else
2590 printf("%s=%s\n", CS m->name, CS m->replacement);
2591 if (name != NULL)
2592 return;
2593 }
2594 }
2595 if (name != NULL)
2596 printf("%s %s not found\n", type, name);
2597 return;
2598 }
2599
059ec3d9
PH
2600if (names_only)
2601 {
2602 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2603 return;
2604 }
2605
2606/* Either search for a given driver, or print all of them */
2607
2608for (; d != NULL; d = d->next)
2609 {
2610 if (name == NULL)
2611 printf("\n%s %s:\n", d->name, type);
2612 else if (Ustrcmp(d->name, name) != 0) continue;
2613
2614 for (ol = ol2; ol < ol2 + size; ol++)
2615 {
2616 if ((ol->type & opt_hidden) == 0)
2617 print_ol(ol, US ol->name, d, ol2, size);
2618 }
2619
2620 for (ol = d->info->options;
2621 ol < d->info->options + *(d->info->options_count); ol++)
2622 {
2623 if ((ol->type & opt_hidden) == 0)
2624 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2625 }
2626 if (name != NULL) return;
2627 }
2628if (name != NULL) printf("%s %s not found\n", type, name);
2629}
2630
2631
2632
2633/*************************************************
2634* Read a named list item *
2635*************************************************/
2636
2637/* This function reads a name and a list (i.e. string). The name is used to
2638save the list in a tree, sorted by its name. Each entry also has a number,
2639which can be used for caching tests, but if the string contains any expansion
2640items other than $key, the number is set negative to inhibit caching. This
2641mechanism is used for domain, host, and address lists that are referenced by
2642the "+name" syntax.
2643
2644Arguments:
2645 anchorp points to the tree anchor
2646 numberp points to the current number for this tree
2647 max the maximum number permitted
2648 s the text of the option line, starting immediately after the name
2649 of the list type
2650 tname the name of the list type, for messages
2651
2652Returns: nothing
2653*/
2654
2655static void
2656read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2657 uschar *tname)
2658{
2659BOOL forcecache = FALSE;
2660uschar *ss;
2661tree_node *t;
2662namedlist_block *nb = store_get(sizeof(namedlist_block));
2663
2664if (Ustrncmp(s, "_cache", 6) == 0)
2665 {
2666 forcecache = TRUE;
2667 s += 6;
2668 }
2669
2670if (!isspace(*s))
2671 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2672
2673if (*numberp >= max)
2674 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2675 tname, max);
2676
2677while (isspace(*s)) s++;
2678ss = s;
2679while (isalnum(*s) || *s == '_') s++;
2680t = store_get(sizeof(tree_node) + s-ss);
2681Ustrncpy(t->name, ss, s-ss);
2682t->name[s-ss] = 0;
2683while (isspace(*s)) s++;
2684
2685if (!tree_insertnode(anchorp, t))
2686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2687 "duplicate name \"%s\" for a named %s", t->name, tname);
2688
2689t->data.ptr = nb;
2690nb->number = *numberp;
2691*numberp += 1;
2692
2693if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2694 "missing '=' after \"%s\"", t->name);
2695while (isspace(*s)) s++;
2696nb->string = read_string(s, t->name);
2697nb->cache_data = NULL;
2698
2699/* Check the string for any expansions; if any are found, mark this list
2700uncacheable unless the user has explicited forced caching. */
2701
2702if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2703}
2704
2705
2706
2707
2708/*************************************************
2709* Unpick data for a rate limit *
2710*************************************************/
2711
2712/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2713separate values.
2714
2715Arguments:
2716 s string, in the form t,b,f,l
2717 where t is the threshold (integer)
2718 b is the initial delay (time)
2719 f is the multiplicative factor (fixed point)
2720 k is the maximum time (time)
2721 threshold where to store threshold
2722 base where to store base in milliseconds
2723 factor where to store factor in milliseconds
2724 limit where to store limit
2725
2726Returns: nothing (panics on error)
2727*/
2728
2729static void
2730unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2731 int *limit)
2732{
2733uschar bstring[16], lstring[16];
2734
2735if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2736 factor, lstring) == 4)
2737 {
2738 *base = readconf_readtime(bstring, 0, TRUE);
2739 *limit = readconf_readtime(lstring, 0, TRUE);
2740 if (*base >= 0 && *limit >= 0) return;
2741 }
2742log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2743}
2744
2745
2746
2747
2748/*************************************************
2749* Read main configuration options *
2750*************************************************/
2751
2752/* This function is the first to be called for configuration reading. It
2753opens the configuration file and reads general configuration settings until
2754it reaches the end of the configuration section. The file is then left open so
2755that the remaining configuration data can subsequently be read if needed for
2756this run of Exim.
2757
2758The configuration file must be owned either by root or exim, and be writeable
2759only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2760in the config file, so the test is done on the compiled in values. A slight
2761anomaly, to be carefully documented.
2762
2763The name of the configuration file is taken from a list that is included in the
2764binary of Exim. It can be altered from the command line, but if that is done,
2765root privilege is immediately withdrawn unless the caller is root or exim.
2766The first file on the list that exists is used.
2767
2768For use on multiple systems that share file systems, first look for a
2769configuration file whose name has the current node name on the end. If that is
2770not found, try the generic name. For really contorted configurations, that run
2771multiple Exims with different uid settings, first try adding the effective uid
2772before the node name. These complications are going to waste resources on most
2773systems. Therefore they are available only when requested by compile-time
2774options. */
2775
2776void
2777readconf_main(void)
2778{
2779int sep = 0;
2780struct stat statbuf;
2781uschar *s, *filename;
2782uschar *list = config_main_filelist;
2783
2784/* Loop through the possible file names */
2785
2786while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2787 != NULL)
2788 {
2789 /* Cut out all the fancy processing unless specifically wanted */
2790
2791 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2792 uschar *suffix = filename + Ustrlen(filename);
2793
2794 /* Try for the node-specific file if a node name exists */
2795
2796 #ifdef CONFIGURE_FILE_USE_NODE
2797 struct utsname uts;
2798 if (uname(&uts) >= 0)
2799 {
2800 #ifdef CONFIGURE_FILE_USE_EUID
2801 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2802 config_file = Ufopen(filename, "rb");
2803 if (config_file == NULL)
2804 #endif /* CONFIGURE_FILE_USE_EUID */
2805 {
2806 sprintf(CS suffix, ".%.256s", uts.nodename);
2807 config_file = Ufopen(filename, "rb");
2808 }
2809 }
2810 #endif /* CONFIGURE_FILE_USE_NODE */
2811
2812 /* Otherwise, try the generic name, possibly with the euid added */
2813
2814 #ifdef CONFIGURE_FILE_USE_EUID
2815 if (config_file == NULL)
2816 {
2817 sprintf(CS suffix, ".%ld", (long int)original_euid);
2818 config_file = Ufopen(filename, "rb");
2819 }
2820 #endif /* CONFIGURE_FILE_USE_EUID */
2821
2822 /* Finally, try the unadorned name */
2823
2824 if (config_file == NULL)
2825 {
2826 *suffix = 0;
2827 config_file = Ufopen(filename, "rb");
2828 }
2829 #else /* if neither defined */
2830
2831 /* This is the common case when the fancy processing is not included. */
2832
2833 config_file = Ufopen(filename, "rb");
2834 #endif
2835
2836 /* If the file does not exist, continue to try any others. For any other
2837 error, break out (and die). */
2838
2839 if (config_file != NULL || errno != ENOENT) break;
2840 }
2841
2842/* On success, save the name for verification; config_filename is used when
2843logging configuration errors (it changes for .included files) whereas
2844config_main_filename is the name shown by -bP. Failure to open a configuration
2845file is a serious disaster. */
2846
2847if (config_file != NULL)
2848 {
2849 config_filename = config_main_filename = string_copy(filename);
2850 }
2851else
2852 {
2853 if (filename == NULL)
2854 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2855 "%s", config_main_filelist);
2856 else
2857 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2858 "configuration file %s", filename));
2859 }
2860
2861/* Check the status of the file we have opened, unless it was specified on
2862the command line, in which case privilege was given away at the start. */
2863
2864if (!config_changed)
2865 {
2866 if (fstat(fileno(config_file), &statbuf) != 0)
2867 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2868 big_buffer);
2869
2870 if ((statbuf.st_uid != root_uid && /* owner not root */
2871 statbuf.st_uid != exim_uid /* owner not exim */
2872 #ifdef CONFIGURE_OWNER
2873 && statbuf.st_uid != config_uid /* owner not the special one */
2874 #endif
2875 ) || /* or */
35edf2ff
PH
2876 (statbuf.st_gid != exim_gid /* group not exim & */
2877 #ifdef CONFIGURE_GROUP
2878 && statbuf.st_gid != config_gid /* group not the special one */
8e669ac1 2879 #endif
35edf2ff 2880 && (statbuf.st_mode & 020) != 0) || /* group writeable */
059ec3d9
PH
2881 /* or */
2882 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2883
2884 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2885 "wrong owner, group, or mode", big_buffer);
2886 }
2887
2888/* Process the main configuration settings. They all begin with a lower case
2889letter. If we see something starting with an upper case letter, it is taken as
2890a macro definition. */
2891
2892while ((s = get_config_line()) != NULL)
2893 {
cf00dad6 2894 if (isupper(s[0])) read_macro_assignment(s);
059ec3d9
PH
2895
2896 else if (Ustrncmp(s, "domainlist", 10) == 0)
2897 read_named_list(&domainlist_anchor, &domainlist_count,
2898 MAX_NAMED_LIST, s+10, US"domain list");
2899
2900 else if (Ustrncmp(s, "hostlist", 8) == 0)
2901 read_named_list(&hostlist_anchor, &hostlist_count,
2902 MAX_NAMED_LIST, s+8, US"host list");
2903
2904 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2905 read_named_list(&addresslist_anchor, &addresslist_count,
2906 MAX_NAMED_LIST, s+11, US"address list");
2907
2908 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2909 read_named_list(&localpartlist_anchor, &localpartlist_count,
2910 MAX_NAMED_LIST, s+13, US"local part list");
2911
2912 else
2913 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2914 NULL, US"main option \"%s\" unknown");
2915 }
2916
2917
2918/* If local_sender_retain is set, local_from_check must be unset. */
2919
2920if (local_sender_retain && local_from_check)
2921 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2922 "local_sender_retain are set; this combination is not allowed");
2923
2924/* If the timezone string is empty, set it to NULL, implying no TZ variable
2925wanted. */
2926
2927if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2928
944a9c55
PH
2929/* The max retry interval must not be greater than 24 hours. */
2930
2931if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2932
059ec3d9
PH
2933/* remote_max_parallel must be > 0 */
2934
2935if (remote_max_parallel <= 0) remote_max_parallel = 1;
2936
6a3f1455
PH
2937/* Save the configured setting of freeze_tell, so we can re-instate it at the
2938start of a new SMTP message. */
2939
2940freeze_tell_config = freeze_tell;
2941
059ec3d9
PH
2942/* The primary host name may be required for expansion of spool_directory
2943and log_file_path, so make sure it is set asap. It is obtained from uname(),
2944but if that yields an unqualified value, make a FQDN by using gethostbyname to
2945canonize it. Some people like upper case letters in their host names, so we
2946don't force the case. */
2947
2948if (primary_hostname == NULL)
2949 {
2950 uschar *hostname;
2951 struct utsname uts;
2952 if (uname(&uts) < 0)
2953 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2954 hostname = US uts.nodename;
2955
2956 if (Ustrchr(hostname, '.') == NULL)
2957 {
2958 int af = AF_INET;
2959 struct hostent *hostdata;
2960
2961 #if HAVE_IPV6
7e66e54d 2962 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
059ec3d9 2963 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
7e66e54d 2964 TRUE, NULL) != OK))
059ec3d9
PH
2965 af = AF_INET6;
2966 #else
2967 af = AF_INET;
2968 #endif
2969
2970 for (;;)
2971 {
2972 #if HAVE_IPV6
2973 #if HAVE_GETIPNODEBYNAME
2974 int error_num;
2975 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2976 #else
2977 hostdata = gethostbyname2(CS hostname, af);
2978 #endif
2979 #else
2980 hostdata = gethostbyname(CS hostname);
2981 #endif
2982
2983 if (hostdata != NULL)
2984 {
2985 hostname = US hostdata->h_name;
2986 break;
2987 }
2988
2989 if (af == AF_INET) break;
2990 af = AF_INET;
2991 }
2992 }
2993
2994 primary_hostname = string_copy(hostname);
2995 }
2996
2997/* Set up default value for smtp_active_hostname */
2998
2999smtp_active_hostname = primary_hostname;
3000
3001/* If spool_directory wasn't set in the build-time configuration, it must have
3002got set above. Of course, writing to the log may not work if log_file_path is
3003not set, but it will at least get to syslog or somewhere, with any luck. */
3004
3005if (*spool_directory == 0)
3006 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3007 "proceed");
3008
3009/* Expand the spool directory name; it may, for example, contain the primary
3010host name. Same comment about failure. */
3011
3012s = expand_string(spool_directory);
3013if (s == NULL)
3014 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3015 "\"%s\": %s", spool_directory, expand_string_message);
3016spool_directory = s;
3017
3018/* Expand log_file_path, which must contain "%s" in any component that isn't
3019the null string or "syslog". It is also allowed to contain one instance of %D.
3020However, it must NOT contain % followed by anything else. */
3021
3022if (*log_file_path != 0)
3023 {
3024 uschar *ss, *sss;
3025 int sep = ':'; /* Fixed for log file path */
3026 s = expand_string(log_file_path);
3027 if (s == NULL)
3028 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3029 "\"%s\": %s", log_file_path, expand_string_message);
3030
3031 ss = s;
3032 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3033 {
3034 uschar *t;
3035 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3036 t = Ustrstr(sss, "%s");
3037 if (t == NULL)
3038 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3039 "contain \"%%s\"", sss);
3040 *t = 'X';
3041 t = Ustrchr(sss, '%');
3042 if (t != NULL)
3043 {
3044 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
3045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3046 "unexpected \"%%\" character", s);
3047 }
3048 }
3049
3050 log_file_path = s;
3051 }
3052
3053/* Interpret syslog_facility into an integer argument for 'ident' param to
3054openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3055leading "log_". */
3056
3057if (syslog_facility_str != NULL)
3058 {
3059 int i;
3060 uschar *s = syslog_facility_str;
3061
3062 if ((Ustrlen(syslog_facility_str) >= 4) &&
3063 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3064 s += 4;
3065
3066 for (i = 0; i < syslog_list_size; i++)
3067 {
3068 if (strcmpic(s, syslog_list[i].name) == 0)
3069 {
3070 syslog_facility = syslog_list[i].value;
3071 break;
3072 }
3073 }
3074
3075 if (i >= syslog_list_size)
3076 {
3077 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3078 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3079 }
3080 }
3081
3082/* Expand pid_file_path */
3083
3084if (*pid_file_path != 0)
3085 {
3086 s = expand_string(pid_file_path);
3087 if (s == NULL)
3088 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3089 "\"%s\": %s", pid_file_path, expand_string_message);
3090 pid_file_path = s;
3091 }
3092
3093/* Compile the regex for matching a UUCP-style "From_" line in an incoming
3094message. */
3095
3096regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3097
3098/* Unpick the SMTP rate limiting options, if set */
3099
3100if (smtp_ratelimit_mail != NULL)
3101 {
3102 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3103 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3104 }
3105
3106if (smtp_ratelimit_rcpt != NULL)
3107 {
3108 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3109 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3110 }
3111
3112/* The qualify domains default to the primary host name */
3113
3114if (qualify_domain_sender == NULL)
3115 qualify_domain_sender = primary_hostname;
3116if (qualify_domain_recipient == NULL)
3117 qualify_domain_recipient = qualify_domain_sender;
3118
3119/* Setting system_filter_user in the configuration sets the gid as well if a
3120name is given, but a numerical value does not. */
3121
3122if (system_filter_uid_set && !system_filter_gid_set)
3123 {
3124 struct passwd *pw = getpwuid(system_filter_uid);
3125 if (pw == NULL)
3126 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3127 (long int)system_filter_uid);
3128 system_filter_gid = pw->pw_gid;
3129 system_filter_gid_set = TRUE;
3130 }
3131
3132/* If the errors_reply_to field is set, check that it is syntactically valid
3133and ensure it contains a domain. */
3134
3135if (errors_reply_to != NULL)
3136 {
3137 uschar *errmess;
3138 int start, end, domain;
3139 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3140 &start, &end, &domain, FALSE);
3141
3142 if (recipient == NULL)
3143 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3144 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3145
3146 if (domain == 0)
3147 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3148 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3149 }
3150
3151/* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3152smtp_accept_max must also be set. */
3153
3154if (smtp_accept_max == 0 &&
3155 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3156 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3157 "smtp_accept_max must be set if smtp_accept_queue or "
3158 "smtp_accept_max_per_host is set");
3159
3160/* Set up the host number if anything is specified. It is an expanded string
3161so that it can be computed from the host name, for example. We do this last
3162so as to ensure that everything else is set up before the expansion. */
3163
3164if (host_number_string != NULL)
3165 {
3166 uschar *end;
3167 uschar *s = expand_string(host_number_string);
3168 long int n = Ustrtol(s, &end, 0);
3169 while (isspace(*end)) end++;
3170 if (*end != 0)
3171 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3172 "localhost_number value is not a number: %s", s);
3173 if (n > LOCALHOST_MAX)
3174 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3175 "localhost_number is greater than the maximum allowed value (%d)",
3176 LOCALHOST_MAX);
3177 host_number = n;
3178 }
3179
3180#ifdef SUPPORT_TLS
3181/* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3182
3183if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3184 tls_verify_certificates == NULL)
3185 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3186 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3187 (tls_verify_hosts != NULL)? "" : "try_");
77bb000f
PP
3188
3189/* If openssl_options is set, validate it */
3190if (openssl_options != NULL)
3191 {
3192# ifdef USE_GNUTLS
3193 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3194 "openssl_options is set but we're using GnuTLS\n");
3195# else
3196 long dummy;
3197 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3199 "openssl_options parse error: %s\n", openssl_options);
3200# endif
3201 }
059ec3d9
PH
3202#endif
3203}
3204
3205
3206
3207/*************************************************
3208* Initialize one driver *
3209*************************************************/
3210
3211/* This is called once the driver's generic options, if any, have been read.
3212We can now find the driver, set up defaults for the private options, and
3213unset any "set" bits in the private options table (which might have been
3214set by another incarnation of the same driver).
3215
3216Arguments:
3217 d pointer to driver instance block, with generic
3218 options filled in
3219 drivers_available vector of available drivers
3220 size_of_info size of each block in drivers_available
3221 class class of driver, for error message
3222
3223Returns: pointer to the driver info block
3224*/
3225
3226static driver_info *
3227init_driver(driver_instance *d, driver_info *drivers_available,
3228 int size_of_info, uschar *class)
3229{
3230driver_info *dd;
3231
3232for (dd = drivers_available; dd->driver_name[0] != 0;
3233 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3234 {
3235 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3236 {
3237 int i;
3238 int len = dd->options_len;
3239 d->info = dd;
3240 d->options_block = store_get(len);
3241 memcpy(d->options_block, dd->options_block, len);
3242 for (i = 0; i < *(dd->options_count); i++)
3243 dd->options[i].type &= ~opt_set;
3244 return dd;
3245 }
3246 }
3247
3248log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3249 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3250
3251return NULL; /* never obeyed */
3252}
3253
3254
3255
3256
3257/*************************************************
3258* Initialize driver list *
3259*************************************************/
3260
3261/* This function is called for routers, transports, and authentication
3262mechanisms. It reads the data from the current point in the configuration file
3263up to the end of the section, and sets up a chain of instance blocks according
3264to the file's contents. The file will already have been opened by a call to
3265readconf_main, and must be left open for subsequent reading of further data.
3266
3267Any errors cause a panic crash. Note that the blocks with names driver_info and
3268driver_instance must map the first portions of all the _info and _instance
3269blocks for this shared code to work.
3270
3271Arguments:
3272 class "router", "transport", or "authenticator"
3273 anchor &routers, &transports, &auths
3274 drivers_available available drivers
3275 size_of_info size of each info block
3276 instance_default points to default data for an instance
3277 instance_size size of instance block
3278 driver_optionlist generic option list
3279 driver_optionlist_count count of generic option list
3280
3281Returns: nothing
3282*/
3283
3284void
3285readconf_driver_init(
3286 uschar *class,
3287 driver_instance **anchor,
3288 driver_info *drivers_available,
3289 int size_of_info,
3290 void *instance_default,
3291 int instance_size,
3292 optionlist *driver_optionlist,
3293 int driver_optionlist_count)
3294{
3295driver_instance **p = anchor;
3296driver_instance *d = NULL;
3297uschar *buffer;
3298
059ec3d9
PH
3299while ((buffer = get_config_line()) != NULL)
3300 {
3301 uschar name[64];
cf00dad6 3302 uschar *s;
059ec3d9 3303
cf00dad6
PH
3304 /* Read the first name on the line and test for the start of a new driver. A
3305 macro definition indicates the end of the previous driver. If this isn't the
3306 start of a new driver, the line will be re-read. */
059ec3d9 3307
cf00dad6
PH
3308 s = readconf_readname(name, sizeof(name), buffer);
3309
3310 /* Handle macro definition, first finishing off the initialization of the
3311 previous driver, if any. */
3312
3313 if (isupper(*name) && *s == '=')
3314 {
3315 if (d != NULL)
3316 {
3317 if (d->driver_name == NULL)
3318 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3319 "no driver defined for %s \"%s\"", class, d->name);
3320 (d->info->init)(d);
3321 d = NULL;
3322 }
3323 read_macro_assignment(buffer);
3324 continue;
3325 }
059ec3d9
PH
3326
3327 /* If the line starts with a name terminated by a colon, we are at the
3328 start of the definition of a new driver. The rest of the line must be
3329 blank. */
3330
3331 if (*s++ == ':')
3332 {
3333 int i;
3334
3335 /* Finish off initializing the previous driver. */
3336
3337 if (d != NULL)
3338 {
3339 if (d->driver_name == NULL)
3340 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3341 "no driver defined for %s \"%s\"", class, d->name);
3342 (d->info->init)(d);
3343 }
3344
3345 /* Check that we haven't already got a driver of this name */
3346
3347 for (d = *anchor; d != NULL; d = d->next)
3348 if (Ustrcmp(name, d->name) == 0)
3349 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3350 "there are two %ss called \"%s\"", class, name);
3351
3352 /* Set up a new driver instance data block on the chain, with
3353 its default values installed. */
3354
3355 d = store_get(instance_size);
3356 memcpy(d, instance_default, instance_size);
3357 *p = d;
3358 p = &(d->next);
3359 d->name = string_copy(name);
3360
3361 /* Clear out the "set" bits in the generic options */
3362
3363 for (i = 0; i < driver_optionlist_count; i++)
3364 driver_optionlist[i].type &= ~opt_set;
3365
3366 /* Check nothing more on this line, then do the next loop iteration. */
3367
3368 while (isspace(*s)) s++;
3369 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3370 continue;
3371 }
3372
cf00dad6
PH
3373 /* Not the start of a new driver. Give an error if we have not set up a
3374 current driver yet. */
059ec3d9
PH
3375
3376 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3377 "%s name missing", class);
3378
3379 /* First look to see if this is a generic option; if it is "driver",
3380 initialize the driver. If is it not a generic option, we can look for a
3381 private option provided that the driver has been previously set up. */
3382
3383 if (readconf_handle_option(buffer, driver_optionlist,
3384 driver_optionlist_count, d, NULL))
3385 {
3386 if (d->info == NULL && d->driver_name != NULL)
3387 init_driver(d, drivers_available, size_of_info, class);
3388 }
3389
3390 /* Handle private options - pass the generic block because some may
3391 live therein. A flag with each option indicates if it is in the public
3392 block. */
3393
3394 else if (d->info != NULL)
3395 {
3396 readconf_handle_option(buffer, d->info->options,
3397 *(d->info->options_count), d, US"option \"%s\" unknown");
3398 }
3399
3400 /* The option is not generic and the driver name has not yet been given. */
3401
3402 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3403 "(\"driver\" must be specified before any private options)", name);
3404 }
3405
3406/* Run the initialization function for the final driver. */
3407
3408if (d != NULL)
3409 {
3410 if (d->driver_name == NULL)
3411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3412 "no driver defined for %s \"%s\"", class, d->name);
3413 (d->info->init)(d);
3414 }
3415}
3416
3417
3418
3419/*************************************************
3420* Check driver dependency *
3421*************************************************/
3422
3423/* This function is passed a driver instance and a string. It checks whether
3424any of the string options for the driver contains the given string as an
3425expansion variable.
3426
3427Arguments:
3428 d points to a driver instance block
3429 s the string to search for
3430
3431Returns: TRUE if a dependency is found
3432*/
3433
3434BOOL
3435readconf_depends(driver_instance *d, uschar *s)
3436{
3437int count = *(d->info->options_count);
3438optionlist *ol;
3439uschar *ss;
3440
3441for (ol = d->info->options; ol < d->info->options + count; ol++)
3442 {
3443 void *options_block;
3444 uschar *value;
3445 int type = ol->type & opt_mask;
3446 if (type != opt_stringptr) continue;
3447 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3448 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3449 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3450 {
3451 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3452 isalnum(ss[Ustrlen(s)])) continue;
3453 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3454 d->name, ol->name, s);
3455 return TRUE;
3456 }
3457 }
3458
3459DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3460return FALSE;
3461}
3462
3463
3464
3465
3466/*************************************************
3467* Decode an error type for retries *
3468*************************************************/
3469
3470/* This function is global because it is also called from the main
3471program when testing retry information. It decodes strings such as "quota_7d"
3472into numerical error codes.
3473
3474Arguments:
3475 pp points to start of text
3476 p points past end of text
3477 basic_errno points to an int to receive the main error number
3478 more_errno points to an int to receive the secondary error data
3479
3480Returns: NULL if decoded correctly; else points to error text
3481*/
3482
3483uschar *
3484readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3485{
3486int len;
3487uschar *q = pp;
3488while (q < p && *q != '_') q++;
3489len = q - pp;
3490
3491if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3492 {
3493 *basic_errno = ERRNO_EXIMQUOTA;
3494 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3495 return US"bad time value";
3496 }
3497
3498else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3499 {
3500 *basic_errno = ECONNREFUSED;
3501 if (q != p)
3502 {
3503 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3504 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3505 else return US"A or MX expected after \"refused\"";
3506 }
3507 }
3508
3509else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3510 {
3511 *basic_errno = ETIMEDOUT;
3512 if (q != p)
3513 {
3514 int i;
3515 int xlen = p - q - 1;
3516 uschar *x = q + 1;
3517
3518 static uschar *extras[] =
3519 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3520 static int values[] =
3521 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3522
3523 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3524 {
3525 if (strncmpic(x, extras[i], xlen) == 0)
3526 {
3527 *more_errno = values[i];
3528 break;
3529 }
3530 }
3531
3532 if (i >= sizeof(extras)/sizeof(uschar *))
3533 {
3534 if (strncmpic(x, US"DNS", xlen) == 0)
3535 {
3536 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3537 "available in retry rules (it has never worked) - treated as "
3538 "\"timeout\"");
3539 }
3540 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3541 }
3542 }
3543 }
3544
e97957bc
PH
3545else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3546 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3547 strncmpic(pp, US"data_4", 6) == 0)
059ec3d9
PH
3548 {
3549 BOOL bad = FALSE;
3550 int x = 255; /* means "any 4xx code" */
3551 if (p != pp + 8) bad = TRUE; else
3552 {
3553 int a = pp[6], b = pp[7];
3554 if (isdigit(a))
3555 {
3556 x = (a - '0') * 10;
3557 if (isdigit(b)) x += b - '0';
3558 else if (b == 'x') x += 100;
3559 else bad = TRUE;
3560 }
3561 else if (a != 'x' || b != 'x') bad = TRUE;
3562 }
3563
e97957bc
PH
3564 if (bad)
3565 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3566 "x is literal and d is any digit", pp);
059ec3d9 3567
e97957bc
PH
3568 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3569 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
059ec3d9
PH
3570 *more_errno = x << 8;
3571 }
3572
3573else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3574 strncmpic(q+1, US"failed", p-q-1) == 0)
059ec3d9 3575 *basic_errno = ERRNO_AUTHFAIL;
e97957bc 3576
48da4259 3577else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
e97957bc
PH
3578 *basic_errno = ERRNO_SMTPCLOSED;
3579
48da4259 3580else if (strncmpic(pp, US"tls_required", p - pp) == 0)
e97957bc 3581 *basic_errno = ERRNO_TLSREQUIRED;
059ec3d9
PH
3582
3583else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3584 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3585
3586return NULL;
3587}
3588
3589
3590
3591
3592/*************************************************
3593* Read retry information *
3594*************************************************/
3595
3596/* Each line of retry information contains:
3597
3598. A domain name pattern or an address pattern;
3599
3600. An error name, possibly with additional data, or *;
3601
3602. An optional sequence of retry items, each consisting of an identifying
3603 letter, a cutoff time, and optional parameters.
3604
3605All this is decoded and placed into a control block. */
3606
3607
3608/* Subroutine to read an argument, preceded by a comma and terminated
3609by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
36101 = fixed point number (returned *1000).
3611
3612Arguments:
3613 paddr pointer to pointer to current character; updated
3614 type 0 => read a time; 1 => read a fixed point number
3615
3616Returns: time in seconds or fixed point number * 1000
3617*/
3618
3619static int
3620retry_arg(uschar **paddr, int type)
3621{
3622uschar *p = *paddr;
3623uschar *pp;
3624
3625if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3626
3627while (isspace(*p)) p++;
3628pp = p;
3629while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3630
3631if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3632 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3633
3634*paddr = p;
3635switch (type)
3636 {
3637 case 0:
3638 return readconf_readtime(pp, *p, FALSE);
3639 case 1:
3640 return readconf_readfixed(pp, *p);
3641 }
3642return 0; /* Keep picky compilers happy */
3643}
3644
3645/* The function proper */
3646
3647void
3648readconf_retries(void)
3649{
3650retry_config **chain = &retries;
3651retry_config *next;
3652uschar *p;
3653
3654while ((p = get_config_line()) != NULL)
3655 {
3656 retry_rule **rchain;
3657 uschar *pp, *error;
3658
3659 next = store_get(sizeof(retry_config));
3660 next->next = NULL;
3661 *chain = next;
3662 chain = &(next->next);
3663 next->basic_errno = next->more_errno = 0;
3664 next->senders = NULL;
3665 next->rules = NULL;
3666 rchain = &(next->rules);
3667
3668 next->pattern = string_dequote(&p);
3669 while (isspace(*p)) p++;
3670 pp = p;
3671 while (mac_isgraph(*p)) p++;
3672 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3673 "missing error type");
3674
3675 /* Test error names for things we understand. */
3676
3677 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3678 &(next->more_errno))) != NULL)
3679 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3680
3681 /* There may be an optional address list of senders to be used as another
3682 constraint on the rule. This was added later, so the syntax is a bit of a
3683 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3684 an address list. */
3685
3686 while (isspace(*p)) p++;
3687 if (Ustrncmp(p, "senders", 7) == 0)
3688 {
3689 p += 7;
3690 while (isspace(*p)) p++;
3691 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3692 "\"=\" expected after \"senders\" in retry rule");
3693 while (isspace(*p)) p++;
3694 next->senders = string_dequote(&p);
3695 }
3696
3697 /* Now the retry rules. Keep the maximum timeout encountered. */
3698
3699 while (isspace(*p)) p++;
3700
3701 while (*p != 0)
3702 {
3703 retry_rule *rule = store_get(sizeof(retry_rule));
3704 *rchain = rule;
3705 rchain = &(rule->next);
3706 rule->next = NULL;
3707 rule->rule = toupper(*p++);
3708 rule->timeout = retry_arg(&p, 0);
3709 if (rule->timeout > retry_maximum_timeout)
3710 retry_maximum_timeout = rule->timeout;
3711
3712 switch (rule->rule)
3713 {
3714 case 'F': /* Fixed interval */
3715 rule->p1 = retry_arg(&p, 0);
3716 break;
3717
3718 case 'G': /* Geometrically increasing intervals */
6af56900 3719 case 'H': /* Ditto, but with randomness */
059ec3d9
PH
3720 rule->p1 = retry_arg(&p, 0);
3721 rule->p2 = retry_arg(&p, 1);
3722 break;
3723
3724 default:
3725 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3726 break;
3727 }
3728
3729 if (rule->timeout <= 0 || rule->p1 <= 0 ||
6af56900 3730 (rule->rule != 'F' && rule->p2 < 1000))
059ec3d9
PH
3731 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3732 "bad parameters for retry rule");
3733
3734 while (isspace(*p)) p++;
3735 if (*p == ';')
3736 {
3737 p++;
3738 while (isspace(*p)) p++;
3739 }
3740 else if (*p != 0)
3741 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3742 }
3743 }
3744}
3745
3746
3747
3748/*************************************************
3749* Initialize authenticators *
3750*************************************************/
3751
3752/* Read the authenticators section of the configuration file.
3753
3754Arguments: none
3755Returns: nothing
3756*/
3757
3758static void
3759auths_init(void)
3760{
3761auth_instance *au, *bu;
3762readconf_driver_init(US"authenticator",
3763 (driver_instance **)(&auths), /* chain anchor */
3764 (driver_info *)auths_available, /* available drivers */
3765 sizeof(auth_info), /* size of info block */
3766 &auth_defaults, /* default values for generic options */
3767 sizeof(auth_instance), /* size of instance block */
3768 optionlist_auths, /* generic options */
3769 optionlist_auths_size);
3770
3771for (au = auths; au != NULL; au = au->next)
3772 {
3773 if (au->public_name == NULL)
3774 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3775 "the %s authenticator", au->name);
3776 for (bu = au->next; bu != NULL; bu = bu->next)
3777 {
3778 if (strcmpic(au->public_name, bu->public_name) == 0)
3779 {
3780 if ((au->client && bu->client) || (au->server && bu->server))
3781 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3782 "(%s and %s) have the same public name (%s)",
3783 (au->client)? US"client" : US"server", au->name, bu->name,
3784 au->public_name);
3785 }
3786 }
3787 }
3788}
3789
3790
3791
3792
3793/*************************************************
3794* Read ACL information *
3795*************************************************/
3796
3797/* If this run of Exim is not doing something that involves receiving a
3798message, we can just skip over the ACL information. No need to parse it.
3799
3800First, we have a function for acl_read() to call back to get the next line. We
3801need to remember the line we passed, because at the end it will contain the
3802name of the next ACL. */
3803
3804static uschar *acl_line;
3805
3806static uschar *
3807acl_callback(void)
3808{
3809acl_line = get_config_line();
3810return acl_line;
3811}
3812
3813
3814/* Now the main function:
3815
3816Arguments:
3817 skip TRUE when this Exim process is doing something that will
3818 not need the ACL data
3819
3820Returns: nothing
3821*/
3822
3823static void
3824readconf_acl(BOOL skip)
3825{
3826uschar *p;
3827
3828/* Not receiving messages, don't need to parse the ACL data */
3829
3830if (skip)
3831 {
3832 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3833 while ((p = get_config_line()) != NULL);
3834 return;
3835 }
3836
cf00dad6
PH
3837/* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3838between ACLs. */
059ec3d9
PH
3839
3840acl_line = get_config_line();
3841
3842while(acl_line != NULL)
3843 {
3844 uschar name[64];
3845 tree_node *node;
3846 uschar *error;
3847
3848 p = readconf_readname(name, sizeof(name), acl_line);
cf00dad6
PH
3849 if (isupper(*name) && *p == '=')
3850 {
3851 read_macro_assignment(acl_line);
3852 acl_line = get_config_line();
3853 continue;
3854 }
3855
3856 if (*p != ':' || name[0] == 0)
3857 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
059ec3d9
PH
3858
3859 node = store_get(sizeof(tree_node) + Ustrlen(name));
3860 Ustrcpy(node->name, name);
3861 if (!tree_insertnode(&acl_anchor, node))
3862 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3863 "there are two ACLs called \"%s\"", name);
3864
3865 node->data.ptr = acl_read(acl_callback, &error);
3866
3867 if (node->data.ptr == NULL && error != NULL)
3868 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3869 }
3870}
3871
3872
3873
3874/*************************************************
3875* Read configuration for local_scan() *
3876*************************************************/
3877
3878/* This function is called after "begin local_scan" is encountered in the
3879configuration file. If the local_scan() function allows for configuration
3880options, we can process them. Otherwise, we expire in a panic.
3881
3882Arguments: none
3883Returns: nothing
3884*/
3885
3886static void
3887local_scan_init(void)
3888{
3889#ifndef LOCAL_SCAN_HAS_OPTIONS
3890log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3891 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3892#else
3893
3894uschar *p;
3895while ((p = get_config_line()) != NULL)
3896 {
3897 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3898 NULL, US"local_scan option \"%s\" unknown");
3899 }
3900#endif
3901}
3902
3903
3904
3905/*************************************************
3906* Read rest of configuration (after main) *
3907*************************************************/
3908
3909/* This function reads the rest of the runtime configuration, after the main
3910configuration. It is called only when actually needed. Each subsequent section
3911of the configuration starts with a line of the form
3912
3913 begin name
3914
3915where the name is "routers", "transports", etc. A section is terminated by
3916hitting the next "begin" line, and the next name is left in next_section.
3917Because it may confuse people as to whether the names are singular or plural,
3918we add "s" if it's missing. There is always enough room in next_section for
3919this. This function is basically just a switch.
3920
3921Arguments:
3922 skip_acl TRUE if ACL information is not needed
3923
3924Returns: nothing
3925*/
3926
3927static uschar *section_list[] = {
3928 US"acls",
3929 US"authenticators",
3930 US"local_scans",
3931 US"retrys",
3932 US"rewrites",
3933 US"routers",
3934 US"transports"};
3935
3936void
3937readconf_rest(BOOL skip_acl)
3938{
3939int had = 0;
3940
3941while(next_section[0] != 0)
3942 {
3943 int bit;
3944 int first = 0;
3945 int last = sizeof(section_list) / sizeof(uschar *);
3946 int mid = last/2;
3947 int n = Ustrlen(next_section);
3948
3949 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3950
3951 for (;;)
3952 {
3953 int c = strcmpic(next_section, section_list[mid]);
3954 if (c == 0) break;
3955 if (c > 0) first = mid + 1; else last = mid;
3956 if (first >= last)
3957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3958 "\"%.*s\" is not a known configuration section name", n, next_section);
3959 mid = (last + first)/2;
3960 }
3961
3962 bit = 1 << mid;
3963 if (((had ^= bit) & bit) == 0)
3964 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3965 "\"%.*s\" section is repeated in the configuration file", n,
3966 next_section);
3967
3968 switch(mid)
3969 {
3970 case 0: readconf_acl(skip_acl); break;
3971 case 1: auths_init(); break;
3972 case 2: local_scan_init(); break;
3973 case 3: readconf_retries(); break;
3974 case 4: readconf_rewrites(); break;
3975 case 5: route_init(); break;
3976 case 6: transport_init(); break;
3977 }
3978 }
3979
f1e894f3 3980(void)fclose(config_file);
059ec3d9
PH
3981}
3982
3983/* End of readconf.c */