Clean up compiler warnings from { gcc -Wall }, many of which I introduced with
[exim.git] / src / src / readconf.c
CommitLineData
73a46702 1/* $Cambridge: exim/src/src/readconf.c,v 1.41 2010/06/07 00:12:42 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;
1361optionlist *ol, *ol2;
1362struct passwd *pw;
1363void *reset_point;
1364int intbase = 0;
1365uschar *inttype = US"";
1366uschar *sptr;
1367uschar *s = buffer;
1368uschar name[64];
1369uschar name2[64];
1370
1371/* There may be leading spaces; thereafter, we expect an option name starting
1372with a letter. */
1373
1374while (isspace(*s)) s++;
1375if (!isalpha(*s))
1376 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1377
1378/* Read the name of the option, and skip any subsequent white space. If
1379it turns out that what we read was "hide", set the flag indicating that
1380this is a secure option, and loop to read the next word. */
1381
1382for (n = 0; n < 2; n++)
1383 {
1384 while (isalnum(*s) || *s == '_')
1385 {
1386 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1387 s++;
1388 }
1389 name[ptr] = 0;
1390 while (isspace(*s)) s++;
1391 if (Ustrcmp(name, "hide") != 0) break;
1392 issecure = opt_secure;
1393 ptr = 0;
1394 }
1395
1396/* Deal with "no_" or "not_" here for booleans */
1397
1398if (Ustrncmp(name, "no_", 3) == 0)
1399 {
1400 boolvalue = FALSE;
1401 offset = 3;
1402 }
1403
1404if (Ustrncmp(name, "not_", 4) == 0)
1405 {
1406 boolvalue = FALSE;
1407 offset = 4;
1408 }
1409
1410/* Search the list for the given name. A non-existent name, or an option that
1411is set twice, is a disaster. */
1412
1413ol = find_option(name + offset, oltop, last);
1414
1415if (ol == NULL)
1416 {
1417 if (unknown_txt == NULL) return FALSE;
1418 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1419 }
1420
1421if ((ol->type & opt_set) != 0)
1422 {
1423 uschar *mname = name;
1424 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1425 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1426 "\"%s\" option set for the second time", mname);
1427 }
1428
1429ol->type |= opt_set | issecure;
1430type = ol->type & opt_mask;
1431
1432/* Types with data values must be followed by '='; the "no[t]_" prefix
1433applies only to boolean values. */
1434
1435if (type < opt_bool || type > opt_bool_last)
1436 {
1437 if (offset != 0)
1438 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1439 "negation prefix applied to a non-boolean option");
1440 if (*s == 0)
1441 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1442 "unexpected end of line (data missing) after %s", name);
1443 if (*s != '=')
1444 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1445 }
1446
1447/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1448true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1449ultimately expands to one of those values. */
1450
1451else if (*s != 0 && (offset != 0 || *s != '='))
1452 extra_chars_error(s, US"boolean option ", name, US"");
1453
1454/* Skip white space after = */
1455
1456if (*s == '=') while (isspace((*(++s))));
1457
1458/* If there is a data block and the opt_public flag is not set, change
1459the data block pointer to the private options block. */
1460
1461if (data_block != NULL && (ol->type & opt_public) == 0)
1462 data_block = (void *)(((driver_instance *)data_block)->options_block);
1463
1464/* Now get the data according to the type. */
1465
1466switch (type)
1467 {
1468 /* If a string value is not enclosed in quotes, it consists of
1469 the rest of the current line, verbatim. Otherwise, string escapes
1470 are processed.
1471
1472 A transport is specified as a string, which is then looked up in the
1473 list of transports. A search type is specified as one of a number of
1474 known strings.
1475
1476 A set or rewrite rules for a driver is specified as a string, which is
1477 then parsed into a suitable chain of control blocks.
1478
1479 Uids and gids are specified as strings which are then looked up in the
1480 passwd file. Lists of uids and gids are similarly specified as colon-
1481 separated strings. */
1482
1483 case opt_stringptr:
1484 case opt_uid:
1485 case opt_gid:
1486 case opt_expand_uid:
1487 case opt_expand_gid:
1488 case opt_uidlist:
1489 case opt_gidlist:
1490 case opt_rewrite:
1491
1492 reset_point = sptr = read_string(s, name);
1493
1494 /* Having read a string, we now have several different ways of using it,
1495 depending on the data type, so do another switch. If keeping the actual
1496 string is not required (because it is interpreted), freesptr is set TRUE,
1497 and at the end we reset the pool. */
1498
1499 switch (type)
1500 {
1501 /* If this was a string, set the variable to point to the new string,
1502 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1503 rules, we still keep the string (for printing), and parse the rules into a
1504 control block and flags word. */
1505
1506 case opt_stringptr:
1507 case opt_rewrite:
1508 if (data_block == NULL)
1509 *((uschar **)(ol->value)) = sptr;
1510 else
1511 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1512 freesptr = FALSE;
1513 if (type == opt_rewrite)
1514 {
1515 int sep = 0;
1516 int *flagptr;
1517 uschar *p = sptr;
1518 rewrite_rule **chain;
1519 optionlist *ol3;
1520
1521 sprintf(CS name2, "*%.50s_rules", name);
1522 ol2 = find_option(name2, oltop, last);
1523 sprintf(CS name2, "*%.50s_flags", name);
1524 ol3 = find_option(name2, oltop, last);
1525
1526 if (ol2 == NULL || ol3 == NULL)
1527 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1528 "rewrite rules not available for driver");
1529
1530 if (data_block == NULL)
1531 {
1532 chain = (rewrite_rule **)(ol2->value);
1533 flagptr = (int *)(ol3->value);
1534 }
1535 else
1536 {
1537 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1538 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1539 }
1540
1541 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1542 != NULL)
1543 {
1544 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1545 *chain = next;
1546 chain = &(next->next);
1547 }
1548
1549 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1551 "non-header rewrite - not allowed at transport time -");
1552 }
1553 break;
1554
1555 /* If it was an expanded uid, see if there is any expansion to be
1556 done by checking for the presence of a $ character. If there is, save it
1557 in the corresponding *expand_user option field. Otherwise, fall through
1558 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1559 of data. */
1560
1561 case opt_expand_uid:
1562 sprintf(CS name2, "*expand_%.50s", name);
1563 ol2 = find_option(name2, oltop, last);
1564 if (ol2 != NULL)
1565 {
1566 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1567
1568 if (data_block == NULL)
1569 *((uschar **)(ol2->value)) = ss;
1570 else
1571 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1572
1573 if (ss != NULL)
1574 {
1575 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1576 freesptr = FALSE;
1577 break;
1578 }
1579 }
1580
1581 /* Look up a fixed uid, and also make use of the corresponding gid
1582 if a passwd entry is returned and the gid has not been set. */
1583
1584 case opt_uid:
1585 if (!route_finduser(sptr, &pw, &uid))
1586 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1587 if (data_block == NULL)
1588 *((uid_t *)(ol->value)) = uid;
1589 else
1590 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1591
1592 /* Set the flag indicating a fixed value is set */
1593
1594 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1595
1596 /* Handle matching gid if we have a passwd entry: done by finding the
1597 same name with terminating "user" changed to "group"; if not found,
1598 ignore. Also ignore if the value is already set. */
1599
1600 if (pw == NULL) break;
1601 Ustrcpy(name+Ustrlen(name)-4, "group");
1602 ol2 = find_option(name, oltop, last);
1603 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1604 (ol2->type & opt_mask) == opt_expand_gid))
1605 {
1606 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1607 if (! *set_flag)
1608 {
1609 if (data_block == NULL)
1610 *((gid_t *)(ol2->value)) = pw->pw_gid;
1611 else
1612 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1613 *set_flag = TRUE;
1614 }
1615 }
1616 break;
1617
1618 /* If it was an expanded gid, see if there is any expansion to be
1619 done by checking for the presence of a $ character. If there is, save it
1620 in the corresponding *expand_user option field. Otherwise, fall through
1621 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1622 of data. */
1623
1624 case opt_expand_gid:
1625 sprintf(CS name2, "*expand_%.50s", name);
1626 ol2 = find_option(name2, oltop, last);
1627 if (ol2 != NULL)
1628 {
1629 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1630
1631 if (data_block == NULL)
1632 *((uschar **)(ol2->value)) = ss;
1633 else
1634 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1635
1636 if (ss != NULL)
1637 {
1638 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1639 freesptr = FALSE;
1640 break;
1641 }
1642 }
1643
1644 /* Handle freestanding gid */
1645
1646 case opt_gid:
1647 if (!route_findgroup(sptr, &gid))
1648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1649 if (data_block == NULL)
1650 *((gid_t *)(ol->value)) = gid;
1651 else
1652 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1653 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1654 break;
1655
1656 /* If it was a uid list, look up each individual entry, and build
1657 a vector of uids, with a count in the first element. Put the vector
1658 in malloc store so we can free the string. (We are reading into
1659 permanent store already.) */
1660
1661 case opt_uidlist:
1662 {
1663 int count = 1;
1664 uid_t *list;
1665 int ptr = 0;
0925ede6
PH
1666 uschar *p;
1667 uschar *op = expand_string (sptr);
1668
1669 if (op == NULL)
1670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1671 name, expand_string_message);
059ec3d9 1672
0925ede6 1673 p = op;
059ec3d9 1674 if (*p != 0) count++;
0925ede6 1675 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1676 list = store_malloc(count*sizeof(uid_t));
1677 list[ptr++] = (uid_t)(count - 1);
1678
1679 if (data_block == NULL)
1680 *((uid_t **)(ol->value)) = list;
1681 else
1682 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1683
0925ede6 1684 p = op;
059ec3d9
PH
1685 while (count-- > 1)
1686 {
1687 int sep = 0;
1688 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1689 if (!route_finduser(big_buffer, NULL, &uid))
1690 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1691 big_buffer);
1692 list[ptr++] = uid;
1693 }
1694 }
1695 break;
1696
1697 /* If it was a gid list, look up each individual entry, and build
1698 a vector of gids, with a count in the first element. Put the vector
1699 in malloc store so we can free the string. (We are reading into permanent
1700 store already.) */
1701
1702 case opt_gidlist:
1703 {
1704 int count = 1;
1705 gid_t *list;
1706 int ptr = 0;
0925ede6
PH
1707 uschar *p;
1708 uschar *op = expand_string (sptr);
1709
1710 if (op == NULL)
1711 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1712 name, expand_string_message);
059ec3d9 1713
0925ede6 1714 p = op;
059ec3d9 1715 if (*p != 0) count++;
0925ede6 1716 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1717 list = store_malloc(count*sizeof(gid_t));
1718 list[ptr++] = (gid_t)(count - 1);
1719
1720 if (data_block == NULL)
1721 *((gid_t **)(ol->value)) = list;
1722 else
1723 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1724
0925ede6 1725 p = op;
059ec3d9
PH
1726 while (count-- > 1)
1727 {
1728 int sep = 0;
1729 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1730 if (!route_findgroup(big_buffer, &gid))
1731 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1732 big_buffer);
1733 list[ptr++] = gid;
1734 }
1735 }
1736 break;
1737 }
1738
1739 /* Release store if the value of the string doesn't need to be kept. */
1740
1741 if (freesptr) store_reset(reset_point);
1742 break;
1743
1744 /* Expanded boolean: if no characters follow, or if there are no dollar
1745 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1746 save the string for later expansion in the alternate place. */
1747
1748 case opt_expand_bool:
1749 if (*s != 0 && Ustrchr(s, '$') != 0)
1750 {
1751 sprintf(CS name2, "*expand_%.50s", name);
1752 ol2 = find_option(name2, oltop, last);
1753 if (ol2 != NULL)
1754 {
1755 reset_point = sptr = read_string(s, name);
1756 if (data_block == NULL)
1757 *((uschar **)(ol2->value)) = sptr;
1758 else
1759 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1760 freesptr = FALSE;
1761 break;
1762 }
1763 }
1764 /* Fall through */
1765
1766 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1767 look for yes/not/true/false. Some booleans are stored in a single bit in
1768 a single int. There's a special fudge for verify settings; without a suffix
1769 they set both xx_sender and xx_recipient. The table points to the sender
1770 value; search subsequently for the recipient. There's another special case:
1771 opt_bool_set also notes when a boolean has been set. */
1772
1773 case opt_bool:
1774 case opt_bit:
1775 case opt_bool_verify:
1776 case opt_bool_set:
1777 if (*s != 0)
1778 {
1779 s = readconf_readname(name2, 64, s);
1780 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1781 boolvalue = TRUE;
1782 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1783 boolvalue = FALSE;
1784 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1785 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1786 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1787 US"for boolean option ", name);
1788 }
1789
1790 /* Handle single-bit type. */
1791
1792 if (type == opt_bit)
1793 {
1794 int bit = 1 << ((ol->type >> 16) & 31);
1795 int *ptr = (data_block == NULL)?
1796 (int *)(ol->value) :
1797 (int *)((uschar *)data_block + (long int)ol->value);
1798 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1799 break;
1800 }
1801
1802 /* Handle full BOOL types */
1803
1804 if (data_block == NULL)
1805 *((BOOL *)(ol->value)) = boolvalue;
1806 else
1807 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1808
1809 /* Verify fudge */
1810
1811 if (type == opt_bool_verify)
1812 {
1813 sprintf(CS name2, "%.50s_recipient", name + offset);
1814 ol2 = find_option(name2, oltop, last);
1815 if (ol2 != NULL)
1816 {
1817 if (data_block == NULL)
1818 *((BOOL *)(ol2->value)) = boolvalue;
1819 else
1820 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1821 }
1822 }
1823
1824 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1825
1826 else if (type == opt_bool_set)
1827 {
1828 sprintf(CS name2, "*set_%.50s", name + offset);
1829 ol2 = find_option(name2, oltop, last);
1830 if (ol2 != NULL)
1831 {
1832 if (data_block == NULL)
1833 *((BOOL *)(ol2->value)) = TRUE;
1834 else
1835 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1836 }
1837 }
1838 break;
1839
1840 /* Octal integer */
1841
1842 case opt_octint:
1843 intbase = 8;
1844 inttype = US"octal ";
1845
1846 /* Integer: a simple(ish) case; allow octal and hex formats, and
1847 suffixes K and M. The different types affect output, not input. */
1848
1849 case opt_mkint:
1850 case opt_int:
1851 {
1852 uschar *endptr;
7e8d92ba
PH
1853 long int lvalue;
1854
059ec3d9 1855 errno = 0;
7e8d92ba 1856 lvalue = strtol(CS s, CSS &endptr, intbase);
059ec3d9
PH
1857
1858 if (endptr == s)
1859 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1860 inttype, name);
1861
1862 if (errno != ERANGE)
1863 {
1864 if (tolower(*endptr) == 'k')
1865 {
7e8d92ba
PH
1866 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1867 else lvalue *= 1024;
059ec3d9
PH
1868 endptr++;
1869 }
1870 else if (tolower(*endptr) == 'm')
1871 {
7e8d92ba 1872 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
059ec3d9 1873 errno = ERANGE;
7e8d92ba 1874 else lvalue *= 1024*1024;
059ec3d9
PH
1875 endptr++;
1876 }
1877 }
1878
7e8d92ba
PH
1879 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1880 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1881 "absolute value of integer \"%s\" is too large (overflow)", s);
059ec3d9
PH
1882
1883 while (isspace(*endptr)) endptr++;
1884 if (*endptr != 0)
1885 extra_chars_error(endptr, inttype, US"integer value for ", name);
7e8d92ba
PH
1886
1887 value = (int)lvalue;
059ec3d9
PH
1888 }
1889
1890 if (data_block == NULL)
1891 *((int *)(ol->value)) = value;
1892 else
1893 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1894 break;
1895
1896 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1897 M. */
1898
1899 case opt_Kint:
1900 {
1901 uschar *endptr;
1902 errno = 0;
1903 value = strtol(CS s, CSS &endptr, intbase);
1904
1905 if (endptr == s)
1906 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1907 inttype, name);
1908
1909 if (errno != ERANGE)
1910 {
1911 if (tolower(*endptr) == 'm')
1912 {
1913 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1914 else value *= 1024;
1915 endptr++;
1916 }
1917 else if (tolower(*endptr) == 'k')
1918 {
1919 endptr++;
1920 }
1921 else
1922 {
1923 value = (value + 512)/1024;
1924 }
1925 }
1926
1927 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1928 "absolute value of integer \"%s\" is too large (overflow)", s);
1929
1930 while (isspace(*endptr)) endptr++;
1931 if (*endptr != 0)
1932 extra_chars_error(endptr, inttype, US"integer value for ", name);
1933 }
1934
1935 if (data_block == NULL)
1936 *((int *)(ol->value)) = value;
1937 else
1938 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1939 break;
1940
1941 /* Fixed-point number: held to 3 decimal places. */
1942
1943 case opt_fixed:
1944 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1945 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1946 "fixed-point number expected for %s", name);
1947
1948 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1949 "integer \"%s\" is too large (overflow)", s);
1950
1951 value *= 1000;
1952
1953 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1954 "integer \"%s\" is too large (overflow)", s);
1955
1956 if (s[count] == '.')
1957 {
1958 int d = 100;
1959 while (isdigit(s[++count]))
1960 {
1961 value += (s[count] - '0') * d;
1962 d /= 10;
1963 }
1964 }
1965
1966 while (isspace(s[count])) count++;
1967
1968 if (s[count] != 0)
1969 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1970
1971 if (data_block == NULL)
1972 *((int *)(ol->value)) = value;
1973 else
1974 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1975 break;
1976
1977 /* There's a special routine to read time values. */
1978
1979 case opt_time:
1980 value = readconf_readtime(s, 0, FALSE);
1981 if (value < 0)
1982 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1983 name);
1984 if (data_block == NULL)
1985 *((int *)(ol->value)) = value;
1986 else
1987 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1988 break;
1989
1990 /* A time list is a list of colon-separated times, with the first
1991 element holding the size of the list and the second the number of
1992 entries used. */
1993
1994 case opt_timelist:
1995 {
1996 int count = 0;
1997 int *list = (data_block == NULL)?
1998 (int *)(ol->value) :
1999 (int *)((uschar *)data_block + (long int)(ol->value));
2000
2001 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2002 {
2003 int terminator = 0;
2004 uschar *snext = Ustrchr(s, ':');
2005 if (snext != NULL)
2006 {
2007 uschar *ss = snext;
2008 while (ss > s && isspace(ss[-1])) ss--;
2009 terminator = *ss;
2010 }
2011 value = readconf_readtime(s, terminator, FALSE);
2012 if (value < 0)
2013 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2014 name);
2015 if (count > 1 && value <= list[count])
2016 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2017 "time value out of order for %s", name);
2018 list[count+1] = value;
2019 if (snext == NULL) break;
2020 s = snext + 1;
2021 while (isspace(*s)) s++;
2022 }
2023
2024 if (count > list[0] - 2)
2025 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2026 name);
2027 if (count > 0 && list[2] == 0) count = 0;
2028 list[1] = count;
2029 }
2030
2031 break;
2032 }
2033
2034return TRUE;
2035}
2036
2037
2038
2039/*************************************************
2040* Print a time value *
2041*************************************************/
2042
2043/*
2044Argument: a time value in seconds
2045Returns: pointer to a fixed buffer containing the time as a string,
2046 in readconf_readtime() format
2047*/
2048
2049uschar *
2050readconf_printtime(int t)
2051{
2052int s, m, h, d, w;
2053uschar *p = time_buffer;
2054
ea49d0e1
PH
2055if (t < 0)
2056 {
2057 *p++ = '-';
2058 t = -t;
2059 }
2060
059ec3d9
PH
2061s = t % 60;
2062t /= 60;
2063m = t % 60;
2064t /= 60;
2065h = t % 24;
2066t /= 24;
2067d = t % 7;
2068w = t/7;
2069
2070if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2071if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2072if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2073if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2074if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2075
2076return time_buffer;
2077}
2078
2079
2080
2081/*************************************************
2082* Print an individual option value *
2083*************************************************/
2084
2085/* This is used by the -bP option, so prints to the standard output.
2086The entire options list is passed in as an argument, because some options come
2087in pairs - typically uid/gid settings, which can either be explicit numerical
2088values, or strings to be expanded later. If the numerical value is unset,
2089search for "*expand_<name>" to see if there is a string equivalent.
2090
2091Arguments:
2092 ol option entry, or NULL for an unknown option
2093 name option name
2094 options_block NULL for main configuration options; otherwise points to
2095 a driver block; if the option doesn't have opt_public
2096 set, then options_block->options_block is where the item
2097 resides.
2098 oltop points to the option list in which ol exists
2099 last one more than the offset of the last entry in optop
2100
2101Returns: nothing
2102*/
2103
2104static void
2105print_ol(optionlist *ol, uschar *name, void *options_block,
2106 optionlist *oltop, int last)
2107{
2108struct passwd *pw;
2109struct group *gr;
2110optionlist *ol2;
2111void *value;
2112uid_t *uidlist;
2113gid_t *gidlist;
2114uschar *s;
2115uschar name2[64];
2116
2117if (ol == NULL)
2118 {
2119 printf("%s is not a known option\n", name);
2120 return;
2121 }
2122
2123/* Non-admin callers cannot see options that have been flagged secure by the
2124"hide" prefix. */
2125
2126if (!admin_user && (ol->type & opt_secure) != 0)
2127 {
2128 printf("%s = <value not displayable>\n", name);
2129 return;
2130 }
2131
2132/* Else show the value of the option */
2133
2134value = ol->value;
2135if (options_block != NULL)
2136 {
2137 if ((ol->type & opt_public) == 0)
2138 options_block = (void *)(((driver_instance *)options_block)->options_block);
2139 value = (void *)((uschar *)options_block + (long int)value);
2140 }
2141
2142switch(ol->type & opt_mask)
2143 {
2144 case opt_stringptr:
2145 case opt_rewrite: /* Show the text value */
2146 s = *((uschar **)value);
2147 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2148 break;
2149
2150 case opt_int:
2151 printf("%s = %d\n", name, *((int *)value));
2152 break;
2153
2154 case opt_mkint:
2155 {
2156 int x = *((int *)value);
2157 if (x != 0 && (x & 1023) == 0)
2158 {
2159 int c = 'K';
2160 x >>= 10;
2161 if ((x & 1023) == 0)
2162 {
2163 c = 'M';
2164 x >>= 10;
2165 }
2166 printf("%s = %d%c\n", name, x, c);
2167 }
2168 else printf("%s = %d\n", name, x);
2169 }
2170 break;
2171
2172 case opt_Kint:
2173 {
2174 int x = *((int *)value);
2175 if (x == 0) printf("%s = 0\n", name);
2176 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2177 else printf("%s = %dK\n", name, x);
2178 }
2179 break;
2180
2181 case opt_octint:
2182 printf("%s = %#o\n", name, *((int *)value));
2183 break;
2184
2185 /* Can be negative only when "unset", in which case integer */
2186
2187 case opt_fixed:
2188 {
2189 int x = *((int *)value);
2190 int f = x % 1000;
2191 int d = 100;
2192 if (x < 0) printf("%s =\n", name); else
2193 {
2194 printf("%s = %d.", name, x/1000);
2195 do
2196 {
2197 printf("%d", f/d);
2198 f %= d;
2199 d /= 10;
2200 }
2201 while (f != 0);
2202 printf("\n");
2203 }
2204 }
2205 break;
2206
2207 /* If the numerical value is unset, try for the string value */
2208
2209 case opt_expand_uid:
2210 if (! *get_set_flag(name, oltop, last, options_block))
2211 {
2212 sprintf(CS name2, "*expand_%.50s", name);
2213 ol2 = find_option(name2, oltop, last);
2214 if (ol2 != NULL)
2215 {
2216 void *value2 = ol2->value;
2217 if (options_block != NULL)
2218 value2 = (void *)((uschar *)options_block + (long int)value2);
2219 s = *((uschar **)value2);
2220 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2221 break;
2222 }
2223 }
2224
2225 /* Else fall through */
2226
2227 case opt_uid:
2228 if (! *get_set_flag(name, oltop, last, options_block))
2229 printf("%s =\n", name);
2230 else
2231 {
2232 pw = getpwuid(*((uid_t *)value));
2233 if (pw == NULL)
2234 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2235 else printf("%s = %s\n", name, pw->pw_name);
2236 }
2237 break;
2238
2239 /* If the numerical value is unset, try for the string value */
2240
2241 case opt_expand_gid:
2242 if (! *get_set_flag(name, oltop, last, options_block))
2243 {
2244 sprintf(CS name2, "*expand_%.50s", name);
2245 ol2 = find_option(name2, oltop, last);
2246 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2247 {
2248 void *value2 = ol2->value;
2249 if (options_block != NULL)
2250 value2 = (void *)((uschar *)options_block + (long int)value2);
2251 s = *((uschar **)value2);
2252 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2253 break;
2254 }
2255 }
2256
2257 /* Else fall through */
2258
2259 case opt_gid:
2260 if (! *get_set_flag(name, oltop, last, options_block))
2261 printf("%s =\n", name);
2262 else
2263 {
2264 gr = getgrgid(*((int *)value));
2265 if (gr == NULL)
2266 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2267 else printf("%s = %s\n", name, gr->gr_name);
2268 }
2269 break;
2270
2271 case opt_uidlist:
2272 uidlist = *((uid_t **)value);
2273 printf("%s =", name);
2274 if (uidlist != NULL)
2275 {
2276 int i;
2277 uschar sep = ' ';
2278 for (i = 1; i <= (int)(uidlist[0]); i++)
2279 {
2280 uschar *name = NULL;
2281 pw = getpwuid(uidlist[i]);
2282 if (pw != NULL) name = US pw->pw_name;
2283 if (name != NULL) printf("%c%s", sep, name);
2284 else printf("%c%ld", sep, (long int)(uidlist[i]));
2285 sep = ':';
2286 }
2287 }
2288 printf("\n");
2289 break;
2290
2291 case opt_gidlist:
2292 gidlist = *((gid_t **)value);
2293 printf("%s =", name);
2294 if (gidlist != NULL)
2295 {
2296 int i;
2297 uschar sep = ' ';
2298 for (i = 1; i <= (int)(gidlist[0]); i++)
2299 {
2300 uschar *name = NULL;
2301 gr = getgrgid(gidlist[i]);
2302 if (gr != NULL) name = US gr->gr_name;
2303 if (name != NULL) printf("%c%s", sep, name);
2304 else printf("%c%ld", sep, (long int)(gidlist[i]));
2305 sep = ':';
2306 }
2307 }
2308 printf("\n");
2309 break;
2310
2311 case opt_time:
2312 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2313 break;
2314
2315 case opt_timelist:
2316 {
2317 int i;
2318 int *list = (int *)value;
2319 printf("%s = ", name);
2320 for (i = 0; i < list[1]; i++)
2321 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2322 printf("\n");
2323 }
2324 break;
2325
2326 case opt_bit:
2327 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2328 "" : "no_", name);
2329 break;
2330
2331 case opt_expand_bool:
2332 sprintf(CS name2, "*expand_%.50s", name);
2333 ol2 = find_option(name2, oltop, last);
2334 if (ol2 != NULL && ol2->value != NULL)
2335 {
2336 void *value2 = ol2->value;
2337 if (options_block != NULL)
2338 value2 = (void *)((uschar *)options_block + (long int)value2);
2339 s = *((uschar **)value2);
2340 if (s != NULL)
2341 {
2342 printf("%s = %s\n", name, string_printing(s));
2343 break;
2344 }
2345 /* s == NULL => string not set; fall through */
2346 }
2347
2348 /* Fall through */
2349
2350 case opt_bool:
2351 case opt_bool_verify:
2352 case opt_bool_set:
2353 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2354 break;
2355 }
2356}
2357
2358
2359
2360/*************************************************
2361* Print value from main configuration *
2362*************************************************/
2363
2364/* This function, called as a result of encountering the -bP option,
2365causes the value of any main configuration variable to be output if the
2366second argument is NULL. There are some special values:
2367
2368 all print all main configuration options
2369 configure_file print the name of the configuration file
2370 routers print the routers' configurations
2371 transports print the transports' configuration
2372 authenticators print the authenticators' configuration
5d9c27ec 2373 macros print the macros' configuration
059ec3d9
PH
2374 router_list print a list of router names
2375 transport_list print a list of transport names
2376 authenticator_list print a list of authentication mechanism names
5d9c27ec 2377 macro_list print a list of macro names
059ec3d9
PH
2378 +name print a named list item
2379 local_scan print the local_scan options
2380
5d9c27ec
TK
2381If the second argument is not NULL, it must be one of "router", "transport",
2382"authenticator" or "macro" in which case the first argument identifies the
2383driver whose options are to be printed.
059ec3d9
PH
2384
2385Arguments:
2386 name option name if type == NULL; else driver name
2387 type NULL or driver type name, as described above
2388
2389Returns: nothing
2390*/
2391
2392void
2393readconf_print(uschar *name, uschar *type)
2394{
2395BOOL names_only = FALSE;
2396optionlist *ol;
2397optionlist *ol2 = NULL;
2398driver_instance *d = NULL;
5d9c27ec 2399macro_item *m;
059ec3d9
PH
2400int size = 0;
2401
2402if (type == NULL)
2403 {
2404 if (*name == '+')
2405 {
2406 int i;
2407 tree_node *t;
2408 BOOL found = FALSE;
2409 static uschar *types[] = { US"address", US"domain", US"host",
2410 US"localpart" };
2411 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2412 &hostlist_anchor, &localpartlist_anchor };
2413
2414 for (i = 0; i < 4; i++)
2415 {
2416 t = tree_search(*(anchors[i]), name+1);
2417 if (t != NULL)
2418 {
2419 found = TRUE;
2420 printf("%slist %s = %s\n", types[i], name+1,
2421 ((namedlist_block *)(t->data.ptr))->string);
2422 }
2423 }
2424
2425 if (!found)
2426 printf("no address, domain, host, or local part list called \"%s\" "
2427 "exists\n", name+1);
2428
2429 return;
2430 }
2431
2432 if (Ustrcmp(name, "configure_file") == 0)
2433 {
2434 printf("%s\n", CS config_main_filename);
2435 return;
2436 }
2437
2438 if (Ustrcmp(name, "all") == 0)
2439 {
2440 for (ol = optionlist_config;
2441 ol < optionlist_config + optionlist_config_size; ol++)
2442 {
2443 if ((ol->type & opt_hidden) == 0)
2444 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2445 }
2446 return;
2447 }
2448
2449 if (Ustrcmp(name, "local_scan") == 0)
2450 {
2451 #ifndef LOCAL_SCAN_HAS_OPTIONS
2452 printf("local_scan() options are not supported\n");
2453 #else
2454 for (ol = local_scan_options;
2455 ol < local_scan_options + local_scan_options_count; ol++)
2456 {
2457 print_ol(ol, US ol->name, NULL, local_scan_options,
2458 local_scan_options_count);
2459 }
2460 #endif
2461 return;
2462 }
2463
2464 if (Ustrcmp(name, "routers") == 0)
2465 {
2466 type = US"router";
2467 name = NULL;
2468 }
2469 else if (Ustrcmp(name, "transports") == 0)
2470 {
2471 type = US"transport";
2472 name = NULL;
2473 }
2474
2475 else if (Ustrcmp(name, "authenticators") == 0)
2476 {
2477 type = US"authenticator";
2478 name = NULL;
2479 }
2480
5d9c27ec 2481 else if (Ustrcmp(name, "macros") == 0)
059ec3d9 2482 {
5d9c27ec 2483 type = US"macro";
059ec3d9 2484 name = NULL;
059ec3d9
PH
2485 }
2486
2487 else if (Ustrcmp(name, "router_list") == 0)
2488 {
2489 type = US"router";
2490 name = NULL;
2491 names_only = TRUE;
2492 }
5d9c27ec 2493
059ec3d9
PH
2494 else if (Ustrcmp(name, "transport_list") == 0)
2495 {
2496 type = US"transport";
2497 name = NULL;
2498 names_only = TRUE;
2499 }
5d9c27ec
TK
2500
2501 else if (Ustrcmp(name, "authenticator_list") == 0)
2502 {
2503 type = US"authenticator";
2504 name = NULL;
2505 names_only = TRUE;
2506 }
2507
2508 else if (Ustrcmp(name, "macro_list") == 0)
2509 {
2510 type = US"macro";
2511 name = NULL;
2512 names_only = TRUE;
2513 }
2514
059ec3d9
PH
2515 else
2516 {
2517 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2518 name, NULL, optionlist_config, optionlist_config_size);
2519 return;
2520 }
2521 }
2522
2523/* Handle the options for a router or transport. Skip options that are flagged
2524as hidden. Some of these are options with names starting with '*', used for
2525internal alternative representations of other options (which the printing
2526function will sort out). Others are synonyms kept for backward compatibility.
2527*/
2528
2529if (Ustrcmp(type, "router") == 0)
2530 {
2531 d = (driver_instance *)routers;
2532 ol2 = optionlist_routers;
2533 size = optionlist_routers_size;
2534 }
2535else if (Ustrcmp(type, "transport") == 0)
2536 {
2537 d = (driver_instance *)transports;
2538 ol2 = optionlist_transports;
2539 size = optionlist_transports_size;
2540 }
2541else if (Ustrcmp(type, "authenticator") == 0)
2542 {
2543 d = (driver_instance *)auths;
2544 ol2 = optionlist_auths;
2545 size = optionlist_auths_size;
2546 }
2547
5d9c27ec
TK
2548else if (Ustrcmp(type, "macro") == 0)
2549 {
2550 /* People store passwords in macros and they were previously not available
2551 for printing. So we have an admin_users restriction. */
2552 if (!admin_user)
2553 {
2554 fprintf(stderr, "exim: permission denied\n");
2555 exit(EXIT_FAILURE);
2556 }
2557 for (m = macros; m != NULL; m = m->next)
2558 {
2559 if (name == NULL || Ustrcmp(name, m->name) == 0)
2560 {
2561 if (names_only)
2562 printf("%s\n", CS m->name);
2563 else
2564 printf("%s=%s\n", CS m->name, CS m->replacement);
2565 if (name != NULL)
2566 return;
2567 }
2568 }
2569 if (name != NULL)
2570 printf("%s %s not found\n", type, name);
2571 return;
2572 }
2573
059ec3d9
PH
2574if (names_only)
2575 {
2576 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2577 return;
2578 }
2579
2580/* Either search for a given driver, or print all of them */
2581
2582for (; d != NULL; d = d->next)
2583 {
2584 if (name == NULL)
2585 printf("\n%s %s:\n", d->name, type);
2586 else if (Ustrcmp(d->name, name) != 0) continue;
2587
2588 for (ol = ol2; ol < ol2 + size; ol++)
2589 {
2590 if ((ol->type & opt_hidden) == 0)
2591 print_ol(ol, US ol->name, d, ol2, size);
2592 }
2593
2594 for (ol = d->info->options;
2595 ol < d->info->options + *(d->info->options_count); ol++)
2596 {
2597 if ((ol->type & opt_hidden) == 0)
2598 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2599 }
2600 if (name != NULL) return;
2601 }
2602if (name != NULL) printf("%s %s not found\n", type, name);
2603}
2604
2605
2606
2607/*************************************************
2608* Read a named list item *
2609*************************************************/
2610
2611/* This function reads a name and a list (i.e. string). The name is used to
2612save the list in a tree, sorted by its name. Each entry also has a number,
2613which can be used for caching tests, but if the string contains any expansion
2614items other than $key, the number is set negative to inhibit caching. This
2615mechanism is used for domain, host, and address lists that are referenced by
2616the "+name" syntax.
2617
2618Arguments:
2619 anchorp points to the tree anchor
2620 numberp points to the current number for this tree
2621 max the maximum number permitted
2622 s the text of the option line, starting immediately after the name
2623 of the list type
2624 tname the name of the list type, for messages
2625
2626Returns: nothing
2627*/
2628
2629static void
2630read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2631 uschar *tname)
2632{
2633BOOL forcecache = FALSE;
2634uschar *ss;
2635tree_node *t;
2636namedlist_block *nb = store_get(sizeof(namedlist_block));
2637
2638if (Ustrncmp(s, "_cache", 6) == 0)
2639 {
2640 forcecache = TRUE;
2641 s += 6;
2642 }
2643
2644if (!isspace(*s))
2645 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2646
2647if (*numberp >= max)
2648 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2649 tname, max);
2650
2651while (isspace(*s)) s++;
2652ss = s;
2653while (isalnum(*s) || *s == '_') s++;
2654t = store_get(sizeof(tree_node) + s-ss);
2655Ustrncpy(t->name, ss, s-ss);
2656t->name[s-ss] = 0;
2657while (isspace(*s)) s++;
2658
2659if (!tree_insertnode(anchorp, t))
2660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2661 "duplicate name \"%s\" for a named %s", t->name, tname);
2662
2663t->data.ptr = nb;
2664nb->number = *numberp;
2665*numberp += 1;
2666
2667if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2668 "missing '=' after \"%s\"", t->name);
2669while (isspace(*s)) s++;
2670nb->string = read_string(s, t->name);
2671nb->cache_data = NULL;
2672
2673/* Check the string for any expansions; if any are found, mark this list
2674uncacheable unless the user has explicited forced caching. */
2675
2676if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2677}
2678
2679
2680
2681
2682/*************************************************
2683* Unpick data for a rate limit *
2684*************************************************/
2685
2686/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2687separate values.
2688
2689Arguments:
2690 s string, in the form t,b,f,l
2691 where t is the threshold (integer)
2692 b is the initial delay (time)
2693 f is the multiplicative factor (fixed point)
2694 k is the maximum time (time)
2695 threshold where to store threshold
2696 base where to store base in milliseconds
2697 factor where to store factor in milliseconds
2698 limit where to store limit
2699
2700Returns: nothing (panics on error)
2701*/
2702
2703static void
2704unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2705 int *limit)
2706{
2707uschar bstring[16], lstring[16];
2708
2709if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2710 factor, lstring) == 4)
2711 {
2712 *base = readconf_readtime(bstring, 0, TRUE);
2713 *limit = readconf_readtime(lstring, 0, TRUE);
2714 if (*base >= 0 && *limit >= 0) return;
2715 }
2716log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2717}
2718
2719
2720
2721
2722/*************************************************
2723* Read main configuration options *
2724*************************************************/
2725
2726/* This function is the first to be called for configuration reading. It
2727opens the configuration file and reads general configuration settings until
2728it reaches the end of the configuration section. The file is then left open so
2729that the remaining configuration data can subsequently be read if needed for
2730this run of Exim.
2731
2732The configuration file must be owned either by root or exim, and be writeable
2733only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2734in the config file, so the test is done on the compiled in values. A slight
2735anomaly, to be carefully documented.
2736
2737The name of the configuration file is taken from a list that is included in the
2738binary of Exim. It can be altered from the command line, but if that is done,
2739root privilege is immediately withdrawn unless the caller is root or exim.
2740The first file on the list that exists is used.
2741
2742For use on multiple systems that share file systems, first look for a
2743configuration file whose name has the current node name on the end. If that is
2744not found, try the generic name. For really contorted configurations, that run
2745multiple Exims with different uid settings, first try adding the effective uid
2746before the node name. These complications are going to waste resources on most
2747systems. Therefore they are available only when requested by compile-time
2748options. */
2749
2750void
2751readconf_main(void)
2752{
2753int sep = 0;
2754struct stat statbuf;
2755uschar *s, *filename;
2756uschar *list = config_main_filelist;
2757
2758/* Loop through the possible file names */
2759
2760while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2761 != NULL)
2762 {
2763 /* Cut out all the fancy processing unless specifically wanted */
2764
2765 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2766 uschar *suffix = filename + Ustrlen(filename);
2767
2768 /* Try for the node-specific file if a node name exists */
2769
2770 #ifdef CONFIGURE_FILE_USE_NODE
2771 struct utsname uts;
2772 if (uname(&uts) >= 0)
2773 {
2774 #ifdef CONFIGURE_FILE_USE_EUID
2775 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2776 config_file = Ufopen(filename, "rb");
2777 if (config_file == NULL)
2778 #endif /* CONFIGURE_FILE_USE_EUID */
2779 {
2780 sprintf(CS suffix, ".%.256s", uts.nodename);
2781 config_file = Ufopen(filename, "rb");
2782 }
2783 }
2784 #endif /* CONFIGURE_FILE_USE_NODE */
2785
2786 /* Otherwise, try the generic name, possibly with the euid added */
2787
2788 #ifdef CONFIGURE_FILE_USE_EUID
2789 if (config_file == NULL)
2790 {
2791 sprintf(CS suffix, ".%ld", (long int)original_euid);
2792 config_file = Ufopen(filename, "rb");
2793 }
2794 #endif /* CONFIGURE_FILE_USE_EUID */
2795
2796 /* Finally, try the unadorned name */
2797
2798 if (config_file == NULL)
2799 {
2800 *suffix = 0;
2801 config_file = Ufopen(filename, "rb");
2802 }
2803 #else /* if neither defined */
2804
2805 /* This is the common case when the fancy processing is not included. */
2806
2807 config_file = Ufopen(filename, "rb");
2808 #endif
2809
2810 /* If the file does not exist, continue to try any others. For any other
2811 error, break out (and die). */
2812
2813 if (config_file != NULL || errno != ENOENT) break;
2814 }
2815
2816/* On success, save the name for verification; config_filename is used when
2817logging configuration errors (it changes for .included files) whereas
2818config_main_filename is the name shown by -bP. Failure to open a configuration
2819file is a serious disaster. */
2820
2821if (config_file != NULL)
2822 {
2823 config_filename = config_main_filename = string_copy(filename);
2824 }
2825else
2826 {
2827 if (filename == NULL)
2828 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2829 "%s", config_main_filelist);
2830 else
2831 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2832 "configuration file %s", filename));
2833 }
2834
2835/* Check the status of the file we have opened, unless it was specified on
2836the command line, in which case privilege was given away at the start. */
2837
2838if (!config_changed)
2839 {
2840 if (fstat(fileno(config_file), &statbuf) != 0)
2841 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2842 big_buffer);
2843
2844 if ((statbuf.st_uid != root_uid && /* owner not root */
2845 statbuf.st_uid != exim_uid /* owner not exim */
2846 #ifdef CONFIGURE_OWNER
2847 && statbuf.st_uid != config_uid /* owner not the special one */
2848 #endif
2849 ) || /* or */
35edf2ff
PH
2850 (statbuf.st_gid != exim_gid /* group not exim & */
2851 #ifdef CONFIGURE_GROUP
2852 && statbuf.st_gid != config_gid /* group not the special one */
8e669ac1 2853 #endif
35edf2ff 2854 && (statbuf.st_mode & 020) != 0) || /* group writeable */
059ec3d9
PH
2855 /* or */
2856 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2857
2858 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2859 "wrong owner, group, or mode", big_buffer);
2860 }
2861
2862/* Process the main configuration settings. They all begin with a lower case
2863letter. If we see something starting with an upper case letter, it is taken as
2864a macro definition. */
2865
2866while ((s = get_config_line()) != NULL)
2867 {
cf00dad6 2868 if (isupper(s[0])) read_macro_assignment(s);
059ec3d9
PH
2869
2870 else if (Ustrncmp(s, "domainlist", 10) == 0)
2871 read_named_list(&domainlist_anchor, &domainlist_count,
2872 MAX_NAMED_LIST, s+10, US"domain list");
2873
2874 else if (Ustrncmp(s, "hostlist", 8) == 0)
2875 read_named_list(&hostlist_anchor, &hostlist_count,
2876 MAX_NAMED_LIST, s+8, US"host list");
2877
2878 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2879 read_named_list(&addresslist_anchor, &addresslist_count,
2880 MAX_NAMED_LIST, s+11, US"address list");
2881
2882 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2883 read_named_list(&localpartlist_anchor, &localpartlist_count,
2884 MAX_NAMED_LIST, s+13, US"local part list");
2885
2886 else
2887 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2888 NULL, US"main option \"%s\" unknown");
2889 }
2890
2891
2892/* If local_sender_retain is set, local_from_check must be unset. */
2893
2894if (local_sender_retain && local_from_check)
2895 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2896 "local_sender_retain are set; this combination is not allowed");
2897
2898/* If the timezone string is empty, set it to NULL, implying no TZ variable
2899wanted. */
2900
2901if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2902
944a9c55
PH
2903/* The max retry interval must not be greater than 24 hours. */
2904
2905if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2906
059ec3d9
PH
2907/* remote_max_parallel must be > 0 */
2908
2909if (remote_max_parallel <= 0) remote_max_parallel = 1;
2910
6a3f1455
PH
2911/* Save the configured setting of freeze_tell, so we can re-instate it at the
2912start of a new SMTP message. */
2913
2914freeze_tell_config = freeze_tell;
2915
059ec3d9
PH
2916/* The primary host name may be required for expansion of spool_directory
2917and log_file_path, so make sure it is set asap. It is obtained from uname(),
2918but if that yields an unqualified value, make a FQDN by using gethostbyname to
2919canonize it. Some people like upper case letters in their host names, so we
2920don't force the case. */
2921
2922if (primary_hostname == NULL)
2923 {
2924 uschar *hostname;
2925 struct utsname uts;
2926 if (uname(&uts) < 0)
2927 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2928 hostname = US uts.nodename;
2929
2930 if (Ustrchr(hostname, '.') == NULL)
2931 {
2932 int af = AF_INET;
2933 struct hostent *hostdata;
2934
2935 #if HAVE_IPV6
7e66e54d 2936 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
059ec3d9 2937 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
7e66e54d 2938 TRUE, NULL) != OK))
059ec3d9
PH
2939 af = AF_INET6;
2940 #else
2941 af = AF_INET;
2942 #endif
2943
2944 for (;;)
2945 {
2946 #if HAVE_IPV6
2947 #if HAVE_GETIPNODEBYNAME
2948 int error_num;
2949 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2950 #else
2951 hostdata = gethostbyname2(CS hostname, af);
2952 #endif
2953 #else
2954 hostdata = gethostbyname(CS hostname);
2955 #endif
2956
2957 if (hostdata != NULL)
2958 {
2959 hostname = US hostdata->h_name;
2960 break;
2961 }
2962
2963 if (af == AF_INET) break;
2964 af = AF_INET;
2965 }
2966 }
2967
2968 primary_hostname = string_copy(hostname);
2969 }
2970
2971/* Set up default value for smtp_active_hostname */
2972
2973smtp_active_hostname = primary_hostname;
2974
2975/* If spool_directory wasn't set in the build-time configuration, it must have
2976got set above. Of course, writing to the log may not work if log_file_path is
2977not set, but it will at least get to syslog or somewhere, with any luck. */
2978
2979if (*spool_directory == 0)
2980 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2981 "proceed");
2982
2983/* Expand the spool directory name; it may, for example, contain the primary
2984host name. Same comment about failure. */
2985
2986s = expand_string(spool_directory);
2987if (s == NULL)
2988 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2989 "\"%s\": %s", spool_directory, expand_string_message);
2990spool_directory = s;
2991
2992/* Expand log_file_path, which must contain "%s" in any component that isn't
2993the null string or "syslog". It is also allowed to contain one instance of %D.
2994However, it must NOT contain % followed by anything else. */
2995
2996if (*log_file_path != 0)
2997 {
2998 uschar *ss, *sss;
2999 int sep = ':'; /* Fixed for log file path */
3000 s = expand_string(log_file_path);
3001 if (s == NULL)
3002 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3003 "\"%s\": %s", log_file_path, expand_string_message);
3004
3005 ss = s;
3006 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3007 {
3008 uschar *t;
3009 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3010 t = Ustrstr(sss, "%s");
3011 if (t == NULL)
3012 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3013 "contain \"%%s\"", sss);
3014 *t = 'X';
3015 t = Ustrchr(sss, '%');
3016 if (t != NULL)
3017 {
3018 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
3019 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3020 "unexpected \"%%\" character", s);
3021 }
3022 }
3023
3024 log_file_path = s;
3025 }
3026
3027/* Interpret syslog_facility into an integer argument for 'ident' param to
3028openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3029leading "log_". */
3030
3031if (syslog_facility_str != NULL)
3032 {
3033 int i;
3034 uschar *s = syslog_facility_str;
3035
3036 if ((Ustrlen(syslog_facility_str) >= 4) &&
3037 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3038 s += 4;
3039
3040 for (i = 0; i < syslog_list_size; i++)
3041 {
3042 if (strcmpic(s, syslog_list[i].name) == 0)
3043 {
3044 syslog_facility = syslog_list[i].value;
3045 break;
3046 }
3047 }
3048
3049 if (i >= syslog_list_size)
3050 {
3051 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3052 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3053 }
3054 }
3055
3056/* Expand pid_file_path */
3057
3058if (*pid_file_path != 0)
3059 {
3060 s = expand_string(pid_file_path);
3061 if (s == NULL)
3062 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3063 "\"%s\": %s", pid_file_path, expand_string_message);
3064 pid_file_path = s;
3065 }
3066
3067/* Compile the regex for matching a UUCP-style "From_" line in an incoming
3068message. */
3069
3070regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3071
3072/* Unpick the SMTP rate limiting options, if set */
3073
3074if (smtp_ratelimit_mail != NULL)
3075 {
3076 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3077 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3078 }
3079
3080if (smtp_ratelimit_rcpt != NULL)
3081 {
3082 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3083 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3084 }
3085
3086/* The qualify domains default to the primary host name */
3087
3088if (qualify_domain_sender == NULL)
3089 qualify_domain_sender = primary_hostname;
3090if (qualify_domain_recipient == NULL)
3091 qualify_domain_recipient = qualify_domain_sender;
3092
3093/* Setting system_filter_user in the configuration sets the gid as well if a
3094name is given, but a numerical value does not. */
3095
3096if (system_filter_uid_set && !system_filter_gid_set)
3097 {
3098 struct passwd *pw = getpwuid(system_filter_uid);
3099 if (pw == NULL)
3100 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3101 (long int)system_filter_uid);
3102 system_filter_gid = pw->pw_gid;
3103 system_filter_gid_set = TRUE;
3104 }
3105
3106/* If the errors_reply_to field is set, check that it is syntactically valid
3107and ensure it contains a domain. */
3108
3109if (errors_reply_to != NULL)
3110 {
3111 uschar *errmess;
3112 int start, end, domain;
3113 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3114 &start, &end, &domain, FALSE);
3115
3116 if (recipient == NULL)
3117 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3118 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3119
3120 if (domain == 0)
3121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3122 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3123 }
3124
3125/* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3126smtp_accept_max must also be set. */
3127
3128if (smtp_accept_max == 0 &&
3129 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3130 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3131 "smtp_accept_max must be set if smtp_accept_queue or "
3132 "smtp_accept_max_per_host is set");
3133
3134/* Set up the host number if anything is specified. It is an expanded string
3135so that it can be computed from the host name, for example. We do this last
3136so as to ensure that everything else is set up before the expansion. */
3137
3138if (host_number_string != NULL)
3139 {
3140 uschar *end;
3141 uschar *s = expand_string(host_number_string);
3142 long int n = Ustrtol(s, &end, 0);
3143 while (isspace(*end)) end++;
3144 if (*end != 0)
3145 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3146 "localhost_number value is not a number: %s", s);
3147 if (n > LOCALHOST_MAX)
3148 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3149 "localhost_number is greater than the maximum allowed value (%d)",
3150 LOCALHOST_MAX);
3151 host_number = n;
3152 }
3153
3154#ifdef SUPPORT_TLS
3155/* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3156
3157if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3158 tls_verify_certificates == NULL)
3159 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3160 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3161 (tls_verify_hosts != NULL)? "" : "try_");
77bb000f
PP
3162
3163/* If openssl_options is set, validate it */
3164if (openssl_options != NULL)
3165 {
3166# ifdef USE_GNUTLS
3167 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3168 "openssl_options is set but we're using GnuTLS\n");
3169# else
3170 long dummy;
3171 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3172 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3173 "openssl_options parse error: %s\n", openssl_options);
3174# endif
3175 }
059ec3d9
PH
3176#endif
3177}
3178
3179
3180
3181/*************************************************
3182* Initialize one driver *
3183*************************************************/
3184
3185/* This is called once the driver's generic options, if any, have been read.
3186We can now find the driver, set up defaults for the private options, and
3187unset any "set" bits in the private options table (which might have been
3188set by another incarnation of the same driver).
3189
3190Arguments:
3191 d pointer to driver instance block, with generic
3192 options filled in
3193 drivers_available vector of available drivers
3194 size_of_info size of each block in drivers_available
3195 class class of driver, for error message
3196
3197Returns: pointer to the driver info block
3198*/
3199
3200static driver_info *
3201init_driver(driver_instance *d, driver_info *drivers_available,
3202 int size_of_info, uschar *class)
3203{
3204driver_info *dd;
3205
3206for (dd = drivers_available; dd->driver_name[0] != 0;
3207 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3208 {
3209 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3210 {
3211 int i;
3212 int len = dd->options_len;
3213 d->info = dd;
3214 d->options_block = store_get(len);
3215 memcpy(d->options_block, dd->options_block, len);
3216 for (i = 0; i < *(dd->options_count); i++)
3217 dd->options[i].type &= ~opt_set;
3218 return dd;
3219 }
3220 }
3221
3222log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3223 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3224
3225return NULL; /* never obeyed */
3226}
3227
3228
3229
3230
3231/*************************************************
3232* Initialize driver list *
3233*************************************************/
3234
3235/* This function is called for routers, transports, and authentication
3236mechanisms. It reads the data from the current point in the configuration file
3237up to the end of the section, and sets up a chain of instance blocks according
3238to the file's contents. The file will already have been opened by a call to
3239readconf_main, and must be left open for subsequent reading of further data.
3240
3241Any errors cause a panic crash. Note that the blocks with names driver_info and
3242driver_instance must map the first portions of all the _info and _instance
3243blocks for this shared code to work.
3244
3245Arguments:
3246 class "router", "transport", or "authenticator"
3247 anchor &routers, &transports, &auths
3248 drivers_available available drivers
3249 size_of_info size of each info block
3250 instance_default points to default data for an instance
3251 instance_size size of instance block
3252 driver_optionlist generic option list
3253 driver_optionlist_count count of generic option list
3254
3255Returns: nothing
3256*/
3257
3258void
3259readconf_driver_init(
3260 uschar *class,
3261 driver_instance **anchor,
3262 driver_info *drivers_available,
3263 int size_of_info,
3264 void *instance_default,
3265 int instance_size,
3266 optionlist *driver_optionlist,
3267 int driver_optionlist_count)
3268{
3269driver_instance **p = anchor;
3270driver_instance *d = NULL;
3271uschar *buffer;
3272
059ec3d9
PH
3273while ((buffer = get_config_line()) != NULL)
3274 {
3275 uschar name[64];
cf00dad6 3276 uschar *s;
059ec3d9 3277
cf00dad6
PH
3278 /* Read the first name on the line and test for the start of a new driver. A
3279 macro definition indicates the end of the previous driver. If this isn't the
3280 start of a new driver, the line will be re-read. */
059ec3d9 3281
cf00dad6
PH
3282 s = readconf_readname(name, sizeof(name), buffer);
3283
3284 /* Handle macro definition, first finishing off the initialization of the
3285 previous driver, if any. */
3286
3287 if (isupper(*name) && *s == '=')
3288 {
3289 if (d != NULL)
3290 {
3291 if (d->driver_name == NULL)
3292 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3293 "no driver defined for %s \"%s\"", class, d->name);
3294 (d->info->init)(d);
3295 d = NULL;
3296 }
3297 read_macro_assignment(buffer);
3298 continue;
3299 }
059ec3d9
PH
3300
3301 /* If the line starts with a name terminated by a colon, we are at the
3302 start of the definition of a new driver. The rest of the line must be
3303 blank. */
3304
3305 if (*s++ == ':')
3306 {
3307 int i;
3308
3309 /* Finish off initializing the previous driver. */
3310
3311 if (d != NULL)
3312 {
3313 if (d->driver_name == NULL)
3314 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3315 "no driver defined for %s \"%s\"", class, d->name);
3316 (d->info->init)(d);
3317 }
3318
3319 /* Check that we haven't already got a driver of this name */
3320
3321 for (d = *anchor; d != NULL; d = d->next)
3322 if (Ustrcmp(name, d->name) == 0)
3323 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3324 "there are two %ss called \"%s\"", class, name);
3325
3326 /* Set up a new driver instance data block on the chain, with
3327 its default values installed. */
3328
3329 d = store_get(instance_size);
3330 memcpy(d, instance_default, instance_size);
3331 *p = d;
3332 p = &(d->next);
3333 d->name = string_copy(name);
3334
3335 /* Clear out the "set" bits in the generic options */
3336
3337 for (i = 0; i < driver_optionlist_count; i++)
3338 driver_optionlist[i].type &= ~opt_set;
3339
3340 /* Check nothing more on this line, then do the next loop iteration. */
3341
3342 while (isspace(*s)) s++;
3343 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3344 continue;
3345 }
3346
cf00dad6
PH
3347 /* Not the start of a new driver. Give an error if we have not set up a
3348 current driver yet. */
059ec3d9
PH
3349
3350 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3351 "%s name missing", class);
3352
3353 /* First look to see if this is a generic option; if it is "driver",
3354 initialize the driver. If is it not a generic option, we can look for a
3355 private option provided that the driver has been previously set up. */
3356
3357 if (readconf_handle_option(buffer, driver_optionlist,
3358 driver_optionlist_count, d, NULL))
3359 {
3360 if (d->info == NULL && d->driver_name != NULL)
3361 init_driver(d, drivers_available, size_of_info, class);
3362 }
3363
3364 /* Handle private options - pass the generic block because some may
3365 live therein. A flag with each option indicates if it is in the public
3366 block. */
3367
3368 else if (d->info != NULL)
3369 {
3370 readconf_handle_option(buffer, d->info->options,
3371 *(d->info->options_count), d, US"option \"%s\" unknown");
3372 }
3373
3374 /* The option is not generic and the driver name has not yet been given. */
3375
3376 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3377 "(\"driver\" must be specified before any private options)", name);
3378 }
3379
3380/* Run the initialization function for the final driver. */
3381
3382if (d != NULL)
3383 {
3384 if (d->driver_name == NULL)
3385 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3386 "no driver defined for %s \"%s\"", class, d->name);
3387 (d->info->init)(d);
3388 }
3389}
3390
3391
3392
3393/*************************************************
3394* Check driver dependency *
3395*************************************************/
3396
3397/* This function is passed a driver instance and a string. It checks whether
3398any of the string options for the driver contains the given string as an
3399expansion variable.
3400
3401Arguments:
3402 d points to a driver instance block
3403 s the string to search for
3404
3405Returns: TRUE if a dependency is found
3406*/
3407
3408BOOL
3409readconf_depends(driver_instance *d, uschar *s)
3410{
3411int count = *(d->info->options_count);
3412optionlist *ol;
3413uschar *ss;
3414
3415for (ol = d->info->options; ol < d->info->options + count; ol++)
3416 {
3417 void *options_block;
3418 uschar *value;
3419 int type = ol->type & opt_mask;
3420 if (type != opt_stringptr) continue;
3421 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3422 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3423 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3424 {
3425 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3426 isalnum(ss[Ustrlen(s)])) continue;
3427 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3428 d->name, ol->name, s);
3429 return TRUE;
3430 }
3431 }
3432
3433DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3434return FALSE;
3435}
3436
3437
3438
3439
3440/*************************************************
3441* Decode an error type for retries *
3442*************************************************/
3443
3444/* This function is global because it is also called from the main
3445program when testing retry information. It decodes strings such as "quota_7d"
3446into numerical error codes.
3447
3448Arguments:
3449 pp points to start of text
3450 p points past end of text
3451 basic_errno points to an int to receive the main error number
3452 more_errno points to an int to receive the secondary error data
3453
3454Returns: NULL if decoded correctly; else points to error text
3455*/
3456
3457uschar *
3458readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3459{
3460int len;
3461uschar *q = pp;
3462while (q < p && *q != '_') q++;
3463len = q - pp;
3464
3465if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3466 {
3467 *basic_errno = ERRNO_EXIMQUOTA;
3468 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3469 return US"bad time value";
3470 }
3471
3472else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3473 {
3474 *basic_errno = ECONNREFUSED;
3475 if (q != p)
3476 {
3477 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3478 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3479 else return US"A or MX expected after \"refused\"";
3480 }
3481 }
3482
3483else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3484 {
3485 *basic_errno = ETIMEDOUT;
3486 if (q != p)
3487 {
3488 int i;
3489 int xlen = p - q - 1;
3490 uschar *x = q + 1;
3491
3492 static uschar *extras[] =
3493 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3494 static int values[] =
3495 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3496
3497 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3498 {
3499 if (strncmpic(x, extras[i], xlen) == 0)
3500 {
3501 *more_errno = values[i];
3502 break;
3503 }
3504 }
3505
3506 if (i >= sizeof(extras)/sizeof(uschar *))
3507 {
3508 if (strncmpic(x, US"DNS", xlen) == 0)
3509 {
3510 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3511 "available in retry rules (it has never worked) - treated as "
3512 "\"timeout\"");
3513 }
3514 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3515 }
3516 }
3517 }
3518
e97957bc
PH
3519else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3520 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3521 strncmpic(pp, US"data_4", 6) == 0)
059ec3d9
PH
3522 {
3523 BOOL bad = FALSE;
3524 int x = 255; /* means "any 4xx code" */
3525 if (p != pp + 8) bad = TRUE; else
3526 {
3527 int a = pp[6], b = pp[7];
3528 if (isdigit(a))
3529 {
3530 x = (a - '0') * 10;
3531 if (isdigit(b)) x += b - '0';
3532 else if (b == 'x') x += 100;
3533 else bad = TRUE;
3534 }
3535 else if (a != 'x' || b != 'x') bad = TRUE;
3536 }
3537
e97957bc
PH
3538 if (bad)
3539 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3540 "x is literal and d is any digit", pp);
059ec3d9 3541
e97957bc
PH
3542 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3543 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
059ec3d9
PH
3544 *more_errno = x << 8;
3545 }
3546
3547else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3548 strncmpic(q+1, US"failed", p-q-1) == 0)
059ec3d9 3549 *basic_errno = ERRNO_AUTHFAIL;
e97957bc 3550
48da4259 3551else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
e97957bc
PH
3552 *basic_errno = ERRNO_SMTPCLOSED;
3553
48da4259 3554else if (strncmpic(pp, US"tls_required", p - pp) == 0)
e97957bc 3555 *basic_errno = ERRNO_TLSREQUIRED;
059ec3d9
PH
3556
3557else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3558 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3559
3560return NULL;
3561}
3562
3563
3564
3565
3566/*************************************************
3567* Read retry information *
3568*************************************************/
3569
3570/* Each line of retry information contains:
3571
3572. A domain name pattern or an address pattern;
3573
3574. An error name, possibly with additional data, or *;
3575
3576. An optional sequence of retry items, each consisting of an identifying
3577 letter, a cutoff time, and optional parameters.
3578
3579All this is decoded and placed into a control block. */
3580
3581
3582/* Subroutine to read an argument, preceded by a comma and terminated
3583by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
35841 = fixed point number (returned *1000).
3585
3586Arguments:
3587 paddr pointer to pointer to current character; updated
3588 type 0 => read a time; 1 => read a fixed point number
3589
3590Returns: time in seconds or fixed point number * 1000
3591*/
3592
3593static int
3594retry_arg(uschar **paddr, int type)
3595{
3596uschar *p = *paddr;
3597uschar *pp;
3598
3599if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3600
3601while (isspace(*p)) p++;
3602pp = p;
3603while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3604
3605if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3606 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3607
3608*paddr = p;
3609switch (type)
3610 {
3611 case 0:
3612 return readconf_readtime(pp, *p, FALSE);
3613 case 1:
3614 return readconf_readfixed(pp, *p);
3615 }
3616return 0; /* Keep picky compilers happy */
3617}
3618
3619/* The function proper */
3620
3621void
3622readconf_retries(void)
3623{
3624retry_config **chain = &retries;
3625retry_config *next;
3626uschar *p;
3627
3628while ((p = get_config_line()) != NULL)
3629 {
3630 retry_rule **rchain;
3631 uschar *pp, *error;
3632
3633 next = store_get(sizeof(retry_config));
3634 next->next = NULL;
3635 *chain = next;
3636 chain = &(next->next);
3637 next->basic_errno = next->more_errno = 0;
3638 next->senders = NULL;
3639 next->rules = NULL;
3640 rchain = &(next->rules);
3641
3642 next->pattern = string_dequote(&p);
3643 while (isspace(*p)) p++;
3644 pp = p;
3645 while (mac_isgraph(*p)) p++;
3646 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3647 "missing error type");
3648
3649 /* Test error names for things we understand. */
3650
3651 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3652 &(next->more_errno))) != NULL)
3653 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3654
3655 /* There may be an optional address list of senders to be used as another
3656 constraint on the rule. This was added later, so the syntax is a bit of a
3657 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3658 an address list. */
3659
3660 while (isspace(*p)) p++;
3661 if (Ustrncmp(p, "senders", 7) == 0)
3662 {
3663 p += 7;
3664 while (isspace(*p)) p++;
3665 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3666 "\"=\" expected after \"senders\" in retry rule");
3667 while (isspace(*p)) p++;
3668 next->senders = string_dequote(&p);
3669 }
3670
3671 /* Now the retry rules. Keep the maximum timeout encountered. */
3672
3673 while (isspace(*p)) p++;
3674
3675 while (*p != 0)
3676 {
3677 retry_rule *rule = store_get(sizeof(retry_rule));
3678 *rchain = rule;
3679 rchain = &(rule->next);
3680 rule->next = NULL;
3681 rule->rule = toupper(*p++);
3682 rule->timeout = retry_arg(&p, 0);
3683 if (rule->timeout > retry_maximum_timeout)
3684 retry_maximum_timeout = rule->timeout;
3685
3686 switch (rule->rule)
3687 {
3688 case 'F': /* Fixed interval */
3689 rule->p1 = retry_arg(&p, 0);
3690 break;
3691
3692 case 'G': /* Geometrically increasing intervals */
6af56900 3693 case 'H': /* Ditto, but with randomness */
059ec3d9
PH
3694 rule->p1 = retry_arg(&p, 0);
3695 rule->p2 = retry_arg(&p, 1);
3696 break;
3697
3698 default:
3699 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3700 break;
3701 }
3702
3703 if (rule->timeout <= 0 || rule->p1 <= 0 ||
6af56900 3704 (rule->rule != 'F' && rule->p2 < 1000))
059ec3d9
PH
3705 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3706 "bad parameters for retry rule");
3707
3708 while (isspace(*p)) p++;
3709 if (*p == ';')
3710 {
3711 p++;
3712 while (isspace(*p)) p++;
3713 }
3714 else if (*p != 0)
3715 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3716 }
3717 }
3718}
3719
3720
3721
3722/*************************************************
3723* Initialize authenticators *
3724*************************************************/
3725
3726/* Read the authenticators section of the configuration file.
3727
3728Arguments: none
3729Returns: nothing
3730*/
3731
3732static void
3733auths_init(void)
3734{
3735auth_instance *au, *bu;
3736readconf_driver_init(US"authenticator",
3737 (driver_instance **)(&auths), /* chain anchor */
3738 (driver_info *)auths_available, /* available drivers */
3739 sizeof(auth_info), /* size of info block */
3740 &auth_defaults, /* default values for generic options */
3741 sizeof(auth_instance), /* size of instance block */
3742 optionlist_auths, /* generic options */
3743 optionlist_auths_size);
3744
3745for (au = auths; au != NULL; au = au->next)
3746 {
3747 if (au->public_name == NULL)
3748 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3749 "the %s authenticator", au->name);
3750 for (bu = au->next; bu != NULL; bu = bu->next)
3751 {
3752 if (strcmpic(au->public_name, bu->public_name) == 0)
3753 {
3754 if ((au->client && bu->client) || (au->server && bu->server))
3755 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3756 "(%s and %s) have the same public name (%s)",
3757 (au->client)? US"client" : US"server", au->name, bu->name,
3758 au->public_name);
3759 }
3760 }
3761 }
3762}
3763
3764
3765
3766
3767/*************************************************
3768* Read ACL information *
3769*************************************************/
3770
3771/* If this run of Exim is not doing something that involves receiving a
3772message, we can just skip over the ACL information. No need to parse it.
3773
3774First, we have a function for acl_read() to call back to get the next line. We
3775need to remember the line we passed, because at the end it will contain the
3776name of the next ACL. */
3777
3778static uschar *acl_line;
3779
3780static uschar *
3781acl_callback(void)
3782{
3783acl_line = get_config_line();
3784return acl_line;
3785}
3786
3787
3788/* Now the main function:
3789
3790Arguments:
3791 skip TRUE when this Exim process is doing something that will
3792 not need the ACL data
3793
3794Returns: nothing
3795*/
3796
3797static void
3798readconf_acl(BOOL skip)
3799{
3800uschar *p;
3801
3802/* Not receiving messages, don't need to parse the ACL data */
3803
3804if (skip)
3805 {
3806 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3807 while ((p = get_config_line()) != NULL);
3808 return;
3809 }
3810
cf00dad6
PH
3811/* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3812between ACLs. */
059ec3d9
PH
3813
3814acl_line = get_config_line();
3815
3816while(acl_line != NULL)
3817 {
3818 uschar name[64];
3819 tree_node *node;
3820 uschar *error;
3821
3822 p = readconf_readname(name, sizeof(name), acl_line);
cf00dad6
PH
3823 if (isupper(*name) && *p == '=')
3824 {
3825 read_macro_assignment(acl_line);
3826 acl_line = get_config_line();
3827 continue;
3828 }
3829
3830 if (*p != ':' || name[0] == 0)
3831 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
059ec3d9
PH
3832
3833 node = store_get(sizeof(tree_node) + Ustrlen(name));
3834 Ustrcpy(node->name, name);
3835 if (!tree_insertnode(&acl_anchor, node))
3836 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3837 "there are two ACLs called \"%s\"", name);
3838
3839 node->data.ptr = acl_read(acl_callback, &error);
3840
3841 if (node->data.ptr == NULL && error != NULL)
3842 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3843 }
3844}
3845
3846
3847
3848/*************************************************
3849* Read configuration for local_scan() *
3850*************************************************/
3851
3852/* This function is called after "begin local_scan" is encountered in the
3853configuration file. If the local_scan() function allows for configuration
3854options, we can process them. Otherwise, we expire in a panic.
3855
3856Arguments: none
3857Returns: nothing
3858*/
3859
3860static void
3861local_scan_init(void)
3862{
3863#ifndef LOCAL_SCAN_HAS_OPTIONS
3864log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3865 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3866#else
3867
3868uschar *p;
3869while ((p = get_config_line()) != NULL)
3870 {
3871 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3872 NULL, US"local_scan option \"%s\" unknown");
3873 }
3874#endif
3875}
3876
3877
3878
3879/*************************************************
3880* Read rest of configuration (after main) *
3881*************************************************/
3882
3883/* This function reads the rest of the runtime configuration, after the main
3884configuration. It is called only when actually needed. Each subsequent section
3885of the configuration starts with a line of the form
3886
3887 begin name
3888
3889where the name is "routers", "transports", etc. A section is terminated by
3890hitting the next "begin" line, and the next name is left in next_section.
3891Because it may confuse people as to whether the names are singular or plural,
3892we add "s" if it's missing. There is always enough room in next_section for
3893this. This function is basically just a switch.
3894
3895Arguments:
3896 skip_acl TRUE if ACL information is not needed
3897
3898Returns: nothing
3899*/
3900
3901static uschar *section_list[] = {
3902 US"acls",
3903 US"authenticators",
3904 US"local_scans",
3905 US"retrys",
3906 US"rewrites",
3907 US"routers",
3908 US"transports"};
3909
3910void
3911readconf_rest(BOOL skip_acl)
3912{
3913int had = 0;
3914
3915while(next_section[0] != 0)
3916 {
3917 int bit;
3918 int first = 0;
3919 int last = sizeof(section_list) / sizeof(uschar *);
3920 int mid = last/2;
3921 int n = Ustrlen(next_section);
3922
3923 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3924
3925 for (;;)
3926 {
3927 int c = strcmpic(next_section, section_list[mid]);
3928 if (c == 0) break;
3929 if (c > 0) first = mid + 1; else last = mid;
3930 if (first >= last)
3931 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3932 "\"%.*s\" is not a known configuration section name", n, next_section);
3933 mid = (last + first)/2;
3934 }
3935
3936 bit = 1 << mid;
3937 if (((had ^= bit) & bit) == 0)
3938 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3939 "\"%.*s\" section is repeated in the configuration file", n,
3940 next_section);
3941
3942 switch(mid)
3943 {
3944 case 0: readconf_acl(skip_acl); break;
3945 case 1: auths_init(); break;
3946 case 2: local_scan_init(); break;
3947 case 3: readconf_retries(); break;
3948 case 4: readconf_rewrites(); break;
3949 case 5: route_init(); break;
3950 case 6: transport_init(); break;
3951 }
3952 }
3953
f1e894f3 3954(void)fclose(config_file);
059ec3d9
PH
3955}
3956
3957/* End of readconf.c */