Bugzilla #887
[exim.git] / src / src / readconf.c
CommitLineData
80a47a2c 1/* $Cambridge: exim/src/src/readconf.c,v 1.36 2009/06/10 07:34:04 tom Exp $ */
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
184e8823 7/* Copyright (c) University of Cambridge 1995 - 2007 */
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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 },
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237#ifdef SUPPORT_TLS
238 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
239 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
240 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
241#endif
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242 { "header_line_maxsize", opt_int, &header_line_maxsize },
243 { "header_maxsize", opt_int, &header_maxsize },
244 { "headers_charset", opt_stringptr, &headers_charset },
245 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
246 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
247 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
248 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
249 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
250 { "hold_domains", opt_stringptr, &hold_domains },
251 { "host_lookup", opt_stringptr, &host_lookup },
252 { "host_lookup_order", opt_stringptr, &host_lookup_order },
253 { "host_reject_connection", opt_stringptr, &host_reject_connection },
254 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
255 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
256#ifdef LOOKUP_IBASE
257 { "ibase_servers", opt_stringptr, &ibase_servers },
258#endif
259 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
260 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
261 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
262 { "keep_malformed", opt_time, &keep_malformed },
263#ifdef LOOKUP_LDAP
264 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
265 { "ldap_version", opt_int, &eldap_version },
266#endif
267 { "local_from_check", opt_bool, &local_from_check },
268 { "local_from_prefix", opt_stringptr, &local_from_prefix },
269 { "local_from_suffix", opt_stringptr, &local_from_suffix },
270 { "local_interfaces", opt_stringptr, &local_interfaces },
271 { "local_scan_timeout", opt_time, &local_scan_timeout },
272 { "local_sender_retain", opt_bool, &local_sender_retain },
273 { "localhost_number", opt_stringptr, &host_number_string },
274 { "log_file_path", opt_stringptr, &log_file_path },
275 { "log_selector", opt_stringptr, &log_selector_string },
276 { "log_timezone", opt_bool, &log_timezone },
277 { "lookup_open_max", opt_int, &lookup_open_max },
278 { "max_username_length", opt_int, &max_username_length },
ddea74fa 279 { "message_body_newlines", opt_bool, &message_body_newlines },
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280 { "message_body_visible", opt_mkint, &message_body_visible },
281 { "message_id_header_domain", opt_stringptr, &message_id_domain },
282 { "message_id_header_text", opt_stringptr, &message_id_text },
283 { "message_logs", opt_bool, &message_logs },
284 { "message_size_limit", opt_stringptr, &message_size_limit },
285#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
286 { "move_frozen_messages", opt_bool, &move_frozen_messages },
287#endif
288 { "mua_wrapper", opt_bool, &mua_wrapper },
289#ifdef LOOKUP_MYSQL
290 { "mysql_servers", opt_stringptr, &mysql_servers },
291#endif
292 { "never_users", opt_uidlist, &never_users },
293#ifdef LOOKUP_ORACLE
294 { "oracle_servers", opt_stringptr, &oracle_servers },
295#endif
296 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
297#ifdef EXIM_PERL
298 { "perl_at_start", opt_bool, &opt_perl_at_start },
299 { "perl_startup", opt_stringptr, &opt_perl_startup },
300#endif
301#ifdef LOOKUP_PGSQL
302 { "pgsql_servers", opt_stringptr, &pgsql_servers },
303#endif
304 { "pid_file_path", opt_stringptr, &pid_file_path },
305 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
306 { "preserve_message_logs", opt_bool, &preserve_message_logs },
307 { "primary_hostname", opt_stringptr, &primary_hostname },
308 { "print_topbitchars", opt_bool, &print_topbitchars },
309 { "process_log_path", opt_stringptr, &process_log_path },
310 { "prod_requires_admin", opt_bool, &prod_requires_admin },
311 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
312 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
313 { "queue_domains", opt_stringptr, &queue_domains },
314 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
315 { "queue_only", opt_bool, &queue_only },
316 { "queue_only_file", opt_stringptr, &queue_only_file },
317 { "queue_only_load", opt_fixed, &queue_only_load },
8669f003 318 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
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319 { "queue_only_override", opt_bool, &queue_only_override },
320 { "queue_run_in_order", opt_bool, &queue_run_in_order },
321 { "queue_run_max", opt_int, &queue_run_max },
322 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
323 { "receive_timeout", opt_time, &receive_timeout },
324 { "received_header_text", opt_stringptr, &received_header_text },
325 { "received_headers_max", opt_int, &received_headers_max },
326 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
327 { "recipients_max", opt_int, &recipients_max },
328 { "recipients_max_reject", opt_bool, &recipients_max_reject },
329 { "remote_max_parallel", opt_int, &remote_max_parallel },
330 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
331 { "retry_data_expire", opt_time, &retry_data_expire },
332 { "retry_interval_max", opt_time, &retry_interval_max },
333 { "return_path_remove", opt_bool, &return_path_remove },
334 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
335 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
336 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
337 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
338 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
339 { "smtp_accept_max", opt_int, &smtp_accept_max },
340 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
341 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
342 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
343 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
344 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
345 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
346 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
347 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
348 { "smtp_banner", opt_stringptr, &smtp_banner },
349 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
350 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
351 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
352 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
353 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
354 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
355 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
356 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
357 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
358 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
359 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
360 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
361 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
362 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
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363#ifdef WITH_CONTENT_SCAN
364 { "spamd_address", opt_stringptr, &spamd_address },
365#endif
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366#ifdef EXPERIMENTAL_SPF
367 { "spf_guess", opt_stringptr, &spf_guess },
368#endif
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369 { "split_spool_directory", opt_bool, &split_spool_directory },
370 { "spool_directory", opt_stringptr, &spool_directory },
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371#ifdef LOOKUP_SQLITE
372 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
373#endif
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374#ifdef EXPERIMENTAL_SRS
375 { "srs_config", opt_stringptr, &srs_config },
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376 { "srs_hashlength", opt_int, &srs_hashlength },
377 { "srs_hashmin", opt_int, &srs_hashmin },
378 { "srs_maxage", opt_int, &srs_maxage },
379 { "srs_secrets", opt_stringptr, &srs_secrets },
380 { "srs_usehash", opt_bool, &srs_usehash },
381 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
8523533c 382#endif
38a0a95f 383 { "strict_acl_vars", opt_bool, &strict_acl_vars },
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384 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
385 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
386 { "syslog_duplication", opt_bool, &syslog_duplication },
387 { "syslog_facility", opt_stringptr, &syslog_facility_str },
388 { "syslog_processname", opt_stringptr, &syslog_processname },
389 { "syslog_timestamp", opt_bool, &syslog_timestamp },
390 { "system_filter", opt_stringptr, &system_filter },
391 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
392 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
393 { "system_filter_group", opt_gid, &system_filter_gid },
394 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
395 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
396 { "system_filter_user", opt_uid, &system_filter_uid },
397 { "tcp_nodelay", opt_bool, &tcp_nodelay },
398 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
399 { "timezone", opt_stringptr, &timezone_string },
400#ifdef SUPPORT_TLS
401 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
402 { "tls_certificate", opt_stringptr, &tls_certificate },
403 { "tls_crl", opt_stringptr, &tls_crl },
404 { "tls_dhparam", opt_stringptr, &tls_dhparam },
405 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
406 { "tls_privatekey", opt_stringptr, &tls_privatekey },
407 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
408 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
409 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
410 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
411 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
412#endif
413 { "trusted_groups", opt_gidlist, &trusted_groups },
414 { "trusted_users", opt_uidlist, &trusted_users },
415 { "unknown_login", opt_stringptr, &unknown_login },
416 { "unknown_username", opt_stringptr, &unknown_username },
417 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
418 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
419 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
420 { "warn_message_file", opt_stringptr, &warn_message_file },
421 { "write_rejectlog", opt_bool, &write_rejectlog }
422};
423
424static int optionlist_config_size =
425 sizeof(optionlist_config)/sizeof(optionlist);
426
427
428
429/*************************************************
430* Find the name of an option *
431*************************************************/
432
433/* This function is to aid debugging. Various functions take arguments that are
434pointer variables in the options table or in option tables for various drivers.
435For debugging output, it is useful to be able to find the name of the option
436which is currently being processed. This function finds it, if it exists, by
437searching the table(s).
438
439Arguments: a value that is presumed to be in the table above
440Returns: the option name, or an empty string
441*/
442
443uschar *
444readconf_find_option(void *p)
445{
446int i;
447router_instance *r;
448transport_instance *t;
449
450for (i = 0; i < optionlist_config_size; i++)
451 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
452
453for (r = routers; r != NULL; r = r->next)
454 {
455 router_info *ri = r->info;
456 for (i = 0; i < ri->options_count[0]; i++)
457 {
458 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
459 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
460 return US ri->options[i].name;
461 }
462 }
463
464for (t = transports; t != NULL; t = t->next)
465 {
466 transport_info *ti = t->info;
467 for (i = 0; i < ti->options_count[0]; i++)
468 {
469 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
470 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
471 return US ti->options[i].name;
472 }
473 }
474
475return US"";
476}
477
478
479
480
cf00dad6
PH
481/*************************************************
482* Deal with an assignment to a macro *
483*************************************************/
484
485/* This function is called when a line that starts with an upper case letter is
486encountered. The argument "line" should contain a complete logical line, and
487start with the first letter of the macro name. The macro name and the
488replacement text are extracted and stored. Redefinition of existing,
489non-command line, macros is permitted using '==' instead of '='.
490
491Arguments:
492 s points to the start of the logical line
493
494Returns: nothing
495*/
496
497static void
498read_macro_assignment(uschar *s)
499{
500uschar name[64];
501int namelen = 0;
502BOOL redef = FALSE;
503macro_item *m;
504macro_item *mlast = NULL;
505
506while (isalnum(*s) || *s == '_')
507 {
508 if (namelen >= sizeof(name) - 1)
509 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
510 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
511 name[namelen++] = *s++;
512 }
513name[namelen] = 0;
514
515while (isspace(*s)) s++;
516if (*s++ != '=')
517 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
518
519if (*s == '=')
520 {
521 redef = TRUE;
522 s++;
523 }
524while (isspace(*s)) s++;
525
526/* If an existing macro of the same name was defined on the command line, we
527just skip this definition. It's an error to attempt to redefine a macro without
528redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
529It is also an error to define a macro whose name begins with the name of a
530previously defined macro. Note: it is documented that the other way round
531works. */
532
533for (m = macros; m != NULL; m = m->next)
534 {
535 int len = Ustrlen(m->name);
536
537 if (Ustrcmp(m->name, name) == 0)
538 {
539 if (!m->command_line && !redef)
540 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
541 "defined (use \"==\" if you want to redefine it", name);
542 break;
543 }
544
545 if (len < namelen && Ustrstr(name, m->name) != NULL)
546 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
547 "a macro because previously defined macro \"%s\" is a substring",
548 name, m->name);
549
550 /* We cannot have this test, because it is documented that a substring
551 macro is permitted (there is even an example).
552 *
553 * if (len > namelen && Ustrstr(m->name, name) != NULL)
554 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
555 * "a macro because it is a substring of previously defined macro \"%s\"",
556 * name, m->name);
557 */
558
559 mlast = m;
560 }
561
562/* Check for an overriding command-line definition. */
563
564if (m != NULL && m->command_line) return;
565
566/* Redefinition must refer to an existing macro. */
567
568if (redef)
569 {
570 if (m == NULL)
571 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
572 "\"%s\"", name);
573 }
574
575/* We have a new definition. The macro_item structure includes a final vector
576called "name" which is one byte long. Thus, adding "namelen" gives us enough
577room to store the "name" string. */
578
579else
580 {
581 m = store_get(sizeof(macro_item) + namelen);
582 if (macros == NULL) macros = m; else mlast->next = m;
583 Ustrncpy(m->name, name, namelen);
584 m->name[namelen] = 0;
585 m->next = NULL;
586 m->command_line = FALSE;
587 }
588
589/* Set the value of the new or redefined macro */
590
591m->replacement = string_copy(s);
592}
593
594
595
596
059ec3d9
PH
597
598/*************************************************
599* Read configuration line *
600*************************************************/
601
602/* A logical line of text is read from the configuration file into the big
603buffer, taking account of macros, .includes, and continuations. The size of
604big_buffer is increased if necessary. The count of configuration lines is
605maintained. Physical input lines starting with # (ignoring leading white space,
606and after macro replacement) and empty logical lines are always ignored.
607Leading and trailing spaces are removed.
608
609If we hit a line of the form "begin xxxx", the xxxx is placed in the
610next_section vector, and the function returns NULL, indicating the end of a
611configuration section. On end-of-file, NULL is returned with next_section
612empty.
613
614Arguments: none
615
616Returns: a pointer to the first non-blank in the line,
617 or NULL if eof or end of section is reached
618*/
619
620static uschar *
621get_config_line(void)
622{
623int startoffset = 0; /* To first non-blank char in logical line */
624int len = 0; /* Of logical line so far */
625int newlen;
626uschar *s, *ss;
627macro_item *m;
628BOOL macro_found;
629
630/* Loop for handling continuation lines, skipping comments, and dealing with
631.include files. */
632
633for (;;)
634 {
635 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
636 {
637 if (config_file_stack != NULL) /* EOF inside .include */
638 {
f1e894f3 639 (void)fclose(config_file);
059ec3d9
PH
640 config_file = config_file_stack->file;
641 config_filename = config_file_stack->filename;
642 config_lineno = config_file_stack->lineno;
643 config_file_stack = config_file_stack->next;
644 continue;
645 }
646
647 /* EOF at top level */
648
649 if (cstate_stack_ptr >= 0)
650 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
651 "Unexpected end of configuration file: .endif missing");
652
653 if (len != 0) break; /* EOF after continuation */
654 next_section[0] = 0; /* EOF at start of logical line */
655 return NULL;
656 }
657
658 config_lineno++;
659 newlen = len + Ustrlen(big_buffer + len);
660
661 /* Handle pathologically long physical lines - yes, it did happen - by
662 extending big_buffer at this point. The code also copes with very long
663 logical lines. */
664
665 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
666 {
667 uschar *newbuffer;
668 big_buffer_size += BIG_BUFFER_SIZE;
669 newbuffer = store_malloc(big_buffer_size);
670
671 /* This use of strcpy is OK because we know that the string in the old
672 buffer is shorter than the new buffer. */
673
674 Ustrcpy(newbuffer, big_buffer);
675 store_free(big_buffer);
676 big_buffer = newbuffer;
677 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
678 break;
679 newlen += Ustrlen(big_buffer + newlen);
680 }
681
682 /* Find the true start of the physical line - leading spaces are always
683 ignored. */
684
685 ss = big_buffer + len;
686 while (isspace(*ss)) ss++;
687
688 /* Process the physical line for macros. If this is the start of the logical
689 line, skip over initial text at the start of the line if it starts with an
690 upper case character followed by a sequence of name characters and an equals
691 sign, because that is the definition of a new macro, and we don't do
692 replacement therein. */
693
694 s = ss;
695 if (len == 0 && isupper(*s))
696 {
697 while (isalnum(*s) || *s == '_') s++;
698 while (isspace(*s)) s++;
699 if (*s != '=') s = ss; /* Not a macro definition */
700 }
701
702 /* For each defined macro, scan the line (from after XXX= if present),
703 replacing all occurrences of the macro. */
704
705 macro_found = FALSE;
706 for (m = macros; m != NULL; m = m->next)
707 {
708 uschar *p, *pp;
709 uschar *t = s;
710
711 while ((p = Ustrstr(t, m->name)) != NULL)
712 {
713 int moveby;
714 int namelen = Ustrlen(m->name);
715 int replen = Ustrlen(m->replacement);
716
717 /* Expand the buffer if necessary */
718
719 while (newlen - namelen + replen + 1 > big_buffer_size)
720 {
721 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
722 uschar *newbuffer = store_malloc(newsize);
723 memcpy(newbuffer, big_buffer, newlen + 1);
724 p = newbuffer + (p - big_buffer);
725 s = newbuffer + (s - big_buffer);
726 ss = newbuffer + (ss - big_buffer);
727 t = newbuffer + (t - big_buffer);
728 big_buffer_size = newsize;
729 store_free(big_buffer);
730 big_buffer = newbuffer;
731 }
732
733 /* Shuffle the remaining characters up or down in the buffer before
734 copying in the replacement text. Don't rescan the replacement for this
735 same macro. */
736
737 pp = p + namelen;
738 moveby = replen - namelen;
739 if (moveby != 0)
740 {
741 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
742 newlen += moveby;
743 }
744 Ustrncpy(p, m->replacement, replen);
745 t = p + replen;
746 macro_found = TRUE;
747 }
748 }
749
750 /* An empty macro replacement at the start of a line could mean that ss no
751 longer points to the first non-blank character. */
752
753 while (isspace(*ss)) ss++;
754
755 /* Check for comment lines - these are physical lines. */
756
757 if (*ss == '#') continue;
758
759 /* Handle conditionals, which are also applied to physical lines. Conditions
760 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
761 expansion occured on the rest of the line. A preliminary test for the leading
762 '.' saves effort on most lines. */
763
764 if (*ss == '.')
765 {
766 int i;
767
768 /* Search the list of conditional directives */
769
770 for (i = 0; i < cond_list_size; i++)
771 {
772 int n;
773 cond_item *c = cond_list+i;
774 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
775
776 /* The following character must be white space or end of string */
777
778 n = ss[1 + c->namelen];
779 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
780
781 /* .ifdef and .ifndef push the current state onto the stack, then set
782 a new one from the table. Stack overflow is an error */
783
784 if (c->pushpop > 0)
785 {
786 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
787 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
788 ".%s nested too deeply", c->name);
789 cstate_stack[++cstate_stack_ptr] = cstate;
790 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
791 }
792
793 /* For any of the others, stack underflow is an error. The next state
794 comes either from the stack (.endif) or from the table. */
795
796 else
797 {
798 if (cstate_stack_ptr < 0)
799 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
800 ".%s without matching .ifdef", c->name);
801 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
802 next_cstate[cstate][macro_found? c->action1 : c->action2];
803 }
804
805 /* Having dealt with a directive, break the loop */
806
807 break;
808 }
809
810 /* If we have handled a conditional directive, continue with the next
811 physical line. Otherwise, fall through. */
812
813 if (i < cond_list_size) continue;
814 }
815
816 /* If the conditional state is not 0 (actively using these lines), ignore
817 this input line. */
818
819 if (cstate != 0) continue; /* Conditional skip */
820
821 /* Handle .include lines - these are also physical lines. */
822
823 if (Ustrncmp(ss, ".include", 8) == 0 &&
824 (isspace(ss[8]) ||
825 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
826 {
827 uschar *t;
828 int include_if_exists = isspace(ss[8])? 0 : 10;
829 config_file_item *save;
830 struct stat statbuf;
831
832 ss += 9 + include_if_exists;
833 while (isspace(*ss)) ss++;
834 t = ss + Ustrlen(ss);
835 while (t > ss && isspace(t[-1])) t--;
836 if (*ss == '\"' && t[-1] == '\"')
837 {
838 ss++;
839 t--;
840 }
841 *t = 0;
842
145396a6
PH
843 if (*ss != '/')
844 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
845 "absolute path \"%s\"", ss);
846
059ec3d9
PH
847 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
848
849 save = store_get(sizeof(config_file_item));
850 save->next = config_file_stack;
851 config_file_stack = save;
852 save->file = config_file;
853 save->filename = config_filename;
854 save->lineno = config_lineno;
855
856 config_file = Ufopen(ss, "rb");
857 if (config_file == NULL)
858 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
859 "configuration file %s", ss);
860 config_filename = string_copy(ss);
861 config_lineno = 0;
862 continue;
863 }
864
865 /* If this is the start of the logical line, remember where the non-blank
866 data starts. Otherwise shuffle down continuation lines to remove leading
867 white space. */
868
869 if (len == 0)
870 startoffset = ss - big_buffer;
871 else
872 {
873 s = big_buffer + len;
874 if (ss > s)
875 {
876 memmove(s, ss, (newlen - len) - (ss - s) + 1);
877 newlen -= ss - s;
878 }
879 }
880
881 /* Accept the new addition to the line. Remove trailing white space. */
882
883 len = newlen;
884 while (len > 0 && isspace(big_buffer[len-1])) len--;
885 big_buffer[len] = 0;
886
887 /* We are done if the line does not end in backslash and contains some data.
888 Empty logical lines are ignored. For continuations, remove the backslash and
889 go round the loop to read the continuation line. */
890
891 if (len > 0)
892 {
893 if (big_buffer[len-1] != '\\') break; /* End of logical line */
894 big_buffer[--len] = 0; /* Remove backslash */
895 }
896 } /* Loop for reading multiple physical lines */
897
898/* We now have a logical line. Test for the end of a configuration section (or,
899more accurately, for the start of the next section). Place the name of the next
900section in next_section, and return NULL. If the name given is longer than
901next_section, truncate it. It will be unrecognized later, because all the known
902section names do fit. Leave space for pluralizing. */
903
904s = big_buffer + startoffset; /* First non-space character */
905if (strncmpic(s, US"begin ", 6) == 0)
906 {
907 s += 6;
908 while (isspace(*s)) s++;
909 if (big_buffer + len - s > sizeof(next_section) - 2)
910 s[sizeof(next_section) - 2] = 0;
911 Ustrcpy(next_section, s);
912 return NULL;
913 }
914
915/* Return the first non-blank character. */
916
917return s;
918}
919
920
921
922/*************************************************
923* Read a name *
924*************************************************/
925
926/* The yield is the pointer to the next uschar. Names longer than the
927output space are silently truncated. This function is also used from acl.c when
928parsing ACLs.
929
930Arguments:
931 name where to put the name
932 len length of name
933 s input pointer
934
935Returns: new input pointer
936*/
937
938uschar *
939readconf_readname(uschar *name, int len, uschar *s)
940{
941int p = 0;
942while (isspace(*s)) s++;
943if (isalpha(*s))
944 {
945 while (isalnum(*s) || *s == '_')
946 {
947 if (p < len-1) name[p++] = *s;
948 s++;
949 }
950 }
951name[p] = 0;
952while (isspace(*s)) s++;
953return s;
954}
955
956
957
958
959/*************************************************
960* Read a time value *
961*************************************************/
962
963/* This function is also called from outside, to read argument
964time values. The format of a time value is:
965
966 [<n>w][<n>d][<n>h][<n>m][<n>s]
967
968as long as at least one is present. If a format error is encountered,
969return a negative value. The value must be terminated by the given
970terminator.
971
972Arguments:
973 s input pointer
974 terminator required terminating character
975 return_msec if TRUE, allow fractional seconds and return milliseconds
976
977Returns: the time value, or -1 on syntax error
978 value is seconds if return_msec is FALSE
979 value is milliseconds if return_msec is TRUE
980*/
981
982int
983readconf_readtime(uschar *s, int terminator, BOOL return_msec)
984{
985int yield = 0;
986for (;;)
987 {
988 int value, count;
989 double fraction;
990
991 if (!isdigit(*s)) return -1;
992 (void)sscanf(CS s, "%d%n", &value, &count);
993 s += count;
994
995 switch (*s)
996 {
997 case 'w': value *= 7;
998 case 'd': value *= 24;
999 case 'h': value *= 60;
1000 case 'm': value *= 60;
1001 case 's': s++;
1002 break;
1003
1004 case '.':
1005 if (!return_msec) return -1;
1006 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1007 s += count;
1008 if (*s++ != 's') return -1;
1009 yield += (int)(fraction * 1000.0);
1010 break;
1011
1012 default: return -1;
1013 }
1014
1015 if (return_msec) value *= 1000;
1016 yield += value;
1017 if (*s == terminator) return yield;
1018 }
1019/* Control never reaches here. */
1020}
1021
1022
1023
1024/*************************************************
1025* Read a fixed point value *
1026*************************************************/
1027
1028/* The value is returned *1000
1029
1030Arguments:
1031 s input pointer
1032 terminator required terminator
1033
1034Returns: the value, or -1 on error
1035*/
1036
1037static int
1038readconf_readfixed(uschar *s, int terminator)
1039{
1040int yield = 0;
1041int value, count;
1042if (!isdigit(*s)) return -1;
1043(void)sscanf(CS s, "%d%n", &value, &count);
1044s += count;
1045yield = value * 1000;
1046if (*s == '.')
1047 {
1048 int m = 100;
1049 while (isdigit((*(++s))))
1050 {
1051 yield += (*s - '0') * m;
1052 m /= 10;
1053 }
1054 }
1055
1056return (*s == terminator)? yield : (-1);
1057}
1058
1059
1060
1061/*************************************************
1062* Find option in list *
1063*************************************************/
1064
1065/* The lists are always in order, so binary chop can be used.
1066
1067Arguments:
1068 name the option name to search for
1069 ol the first entry in the option list
1070 last one more than the offset of the last entry in the option list
1071
1072Returns: pointer to an option entry, or NULL if not found
1073*/
1074
1075static optionlist *
1076find_option(uschar *name, optionlist *ol, int last)
1077{
1078int first = 0;
1079while (last > first)
1080 {
1081 int middle = (first + last)/2;
1082 int c = Ustrcmp(name, ol[middle].name);
1083 if (c == 0) return ol + middle;
1084 else if (c > 0) first = middle + 1;
1085 else last = middle;
1086 }
1087return NULL;
1088}
1089
1090
1091
1092/*************************************************
1093* Find a set flag in option list *
1094*************************************************/
1095
1096/* Because some versions of Unix make no restrictions on the values of uids and
1097gids (even negative ones), we cannot represent "unset" by a special value.
1098There is therefore a separate boolean variable for each one indicating whether
1099a value is set or not. This function returns a pointer to the boolean, given
1100the original option name. It is a major disaster if the flag cannot be found.
1101
1102Arguments:
1103 name the name of the uid or gid option
1104 oltop points to the start of the relevant option list
1105 last one more than the offset of the last item in the option list
1106 data_block NULL when reading main options => data values in the option
1107 list are absolute addresses; otherwise they are byte offsets
1108 in data_block (used for driver options)
1109
1110Returns: a pointer to the boolean flag.
1111*/
1112
1113static BOOL *
1114get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1115{
1116optionlist *ol;
1117uschar name2[64];
1118sprintf(CS name2, "*set_%.50s", name);
1119ol = find_option(name2, oltop, last);
1120if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1121 "Exim internal error: missing set flag for %s", name);
1122return (data_block == NULL)? (BOOL *)(ol->value) :
1123 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1124}
1125
1126
1127
1128
1129/*************************************************
1130* Output extra characters message and die *
1131*************************************************/
1132
1133/* Called when an option line has junk on the end. Sometimes this is because
1134the sysadmin thinks comments are permitted.
1135
1136Arguments:
1137 s points to the extra characters
1138 t1..t3 strings to insert in the log message
1139
1140Returns: doesn't return; dies
1141*/
1142
1143static void
1144extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1145{
1146uschar *comment = US"";
1147if (*s == '#') comment = US" (# is comment only at line start)";
1148log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1149 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1150}
1151
1152
1153
1154/*************************************************
1155* Read rewrite information *
1156*************************************************/
1157
1158/* Each line of rewrite information contains:
1159
1160. A complete address in the form user@domain, possibly with
1161 leading * for each part; or alternatively, a regex.
1162
1163. A replacement string (which will be expanded).
1164
1165. An optional sequence of one-letter flags, indicating which
1166 headers etc. to apply this rule to.
1167
1168All this is decoded and placed into a control block. The OR of the flags is
1169maintained in a common word.
1170
1171Arguments:
1172 p points to the string that makes up the rule
1173 existflags points to the overall flag word
1174 isglobal TRUE if reading global rewrite rules
1175
1176Returns: the control block for the parsed rule.
1177*/
1178
1179static rewrite_rule *
1180readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1181{
1182rewrite_rule *next = store_get(sizeof(rewrite_rule));
1183
1184next->next = NULL;
1185next->key = string_dequote(&p);
1186
1187while (isspace(*p)) p++;
1188if (*p == 0)
1189 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1190 "missing rewrite replacement string");
1191
1192next->flags = 0;
1193next->replacement = string_dequote(&p);
1194
1195while (*p != 0) switch (*p++)
1196 {
1197 case ' ': case '\t': break;
1198
1199 case 'q': next->flags |= rewrite_quit; break;
1200 case 'w': next->flags |= rewrite_whole; break;
1201
1202 case 'h': next->flags |= rewrite_all_headers; break;
1203 case 's': next->flags |= rewrite_sender; break;
1204 case 'f': next->flags |= rewrite_from; break;
1205 case 't': next->flags |= rewrite_to; break;
1206 case 'c': next->flags |= rewrite_cc; break;
1207 case 'b': next->flags |= rewrite_bcc; break;
1208 case 'r': next->flags |= rewrite_replyto; break;
1209
1210 case 'E': next->flags |= rewrite_all_envelope; break;
1211 case 'F': next->flags |= rewrite_envfrom; break;
1212 case 'T': next->flags |= rewrite_envto; break;
1213
1214 case 'Q': next->flags |= rewrite_qualify; break;
1215 case 'R': next->flags |= rewrite_repeat; break;
1216
1217 case 'S':
1218 next->flags |= rewrite_smtp;
1219 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1220 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1221 "rewrite rule has the S flag but is not a regular expression");
1222 break;
1223
1224 default:
1225 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1226 "unknown rewrite flag character '%c' "
1227 "(could be missing quotes round replacement item)", p[-1]);
1228 break;
1229 }
1230
1231/* If no action flags are set, set all the "normal" rewrites. */
1232
1233if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1234 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1235
1236/* Remember which exist, for optimization, and return the rule */
1237
1238*existflags |= next->flags;
1239return next;
1240}
1241
1242
1243
1244
1245/*************************************************
1246* Read global rewrite information *
1247*************************************************/
1248
1249/* Each line is a single rewrite rule; it is parsed into a control block
1250by readconf_one_rewrite(), and its flags are ORed into the global flag
1251word rewrite_existflags. */
1252
1253void
1254readconf_rewrites(void)
1255{
1256rewrite_rule **chain = &global_rewrite_rules;
1257uschar *p;
1258
1259while ((p = get_config_line()) != NULL)
1260 {
1261 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1262 *chain = next;
1263 chain = &(next->next);
1264 }
1265}
1266
1267
1268
1269/*************************************************
1270* Read a string *
1271*************************************************/
1272
1273/* Strings are read into the normal store pool. As long we aren't too
1274near the end of the current block, the string will just use what is necessary
1275on the top of the stacking pool, because string_cat() uses the extension
1276mechanism.
1277
1278Argument:
1279 s the rest of the input line
1280 name the option name (for errors)
1281
1282Returns: pointer to the string
1283*/
1284
1285static uschar *
1286read_string(uschar *s, uschar *name)
1287{
1288uschar *yield;
1289uschar *ss;
1290
1291if (*s != '\"') return string_copy(s);
1292
1293ss = s;
1294yield = string_dequote(&s);
1295
1296if (s == ss+1 || s[-1] != '\"')
1297 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1298 "missing quote at end of string value for %s", name);
1299
1300if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1301
1302return yield;
1303}
1304
1305
1306/*************************************************
1307* Handle option line *
1308*************************************************/
1309
1310/* This function is called from several places to process a line containing the
1311setting of an option. The first argument is the line to be decoded; it has been
1312checked not to be empty and not to start with '#'. Trailing newlines and white
1313space have been removed. The second argument is a pointer to the list of
1314variable names that are to be recognized, together with their types and
1315locations, and the third argument gives the number of entries in the list.
1316
1317The fourth argument is a pointer to a data block. If it is NULL, then the data
1318values in the options list are absolute addresses. Otherwise, they are byte
1319offsets in the data block.
1320
1321String option data may continue onto several lines; this function reads further
1322data from config_file if necessary.
1323
1324The yield of this function is normally zero. If a string continues onto
1325multiple lines, then the data value is permitted to be followed by a comma
1326or a semicolon (for use in drivers) and the yield is that character.
1327
1328Arguments:
1329 buffer contains the configuration line to be handled
1330 oltop points to the start of the relevant option list
1331 last one more than the offset of the last item in the option list
1332 data_block NULL when reading main options => data values in the option
1333 list are absolute addresses; otherwise they are byte offsets
1334 in data_block when they have opt_public set; otherwise
1335 they are byte offsets in data_block->options_block.
1336 unknown_txt format string to use in panic message for unknown option;
1337 must contain %s for option name
1338 if given as NULL, don't panic on unknown option
1339
1340Returns: TRUE if an option was read successfully,
1341 FALSE false for an unknown option if unknown_txt == NULL,
1342 otherwise panic and die on an unknown option
1343*/
1344
1345static BOOL
1346readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1347 void *data_block, uschar *unknown_txt)
1348{
1349int ptr = 0;
1350int offset = 0;
1351int n, count, type, value;
1352int issecure = 0;
1353uid_t uid;
1354gid_t gid;
1355BOOL boolvalue = TRUE;
1356BOOL freesptr = TRUE;
1357optionlist *ol, *ol2;
1358struct passwd *pw;
1359void *reset_point;
1360int intbase = 0;
1361uschar *inttype = US"";
1362uschar *sptr;
1363uschar *s = buffer;
1364uschar name[64];
1365uschar name2[64];
1366
1367/* There may be leading spaces; thereafter, we expect an option name starting
1368with a letter. */
1369
1370while (isspace(*s)) s++;
1371if (!isalpha(*s))
1372 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1373
1374/* Read the name of the option, and skip any subsequent white space. If
1375it turns out that what we read was "hide", set the flag indicating that
1376this is a secure option, and loop to read the next word. */
1377
1378for (n = 0; n < 2; n++)
1379 {
1380 while (isalnum(*s) || *s == '_')
1381 {
1382 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1383 s++;
1384 }
1385 name[ptr] = 0;
1386 while (isspace(*s)) s++;
1387 if (Ustrcmp(name, "hide") != 0) break;
1388 issecure = opt_secure;
1389 ptr = 0;
1390 }
1391
1392/* Deal with "no_" or "not_" here for booleans */
1393
1394if (Ustrncmp(name, "no_", 3) == 0)
1395 {
1396 boolvalue = FALSE;
1397 offset = 3;
1398 }
1399
1400if (Ustrncmp(name, "not_", 4) == 0)
1401 {
1402 boolvalue = FALSE;
1403 offset = 4;
1404 }
1405
1406/* Search the list for the given name. A non-existent name, or an option that
1407is set twice, is a disaster. */
1408
1409ol = find_option(name + offset, oltop, last);
1410
1411if (ol == NULL)
1412 {
1413 if (unknown_txt == NULL) return FALSE;
1414 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1415 }
1416
1417if ((ol->type & opt_set) != 0)
1418 {
1419 uschar *mname = name;
1420 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1422 "\"%s\" option set for the second time", mname);
1423 }
1424
1425ol->type |= opt_set | issecure;
1426type = ol->type & opt_mask;
1427
1428/* Types with data values must be followed by '='; the "no[t]_" prefix
1429applies only to boolean values. */
1430
1431if (type < opt_bool || type > opt_bool_last)
1432 {
1433 if (offset != 0)
1434 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1435 "negation prefix applied to a non-boolean option");
1436 if (*s == 0)
1437 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1438 "unexpected end of line (data missing) after %s", name);
1439 if (*s != '=')
1440 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1441 }
1442
1443/* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1444true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1445ultimately expands to one of those values. */
1446
1447else if (*s != 0 && (offset != 0 || *s != '='))
1448 extra_chars_error(s, US"boolean option ", name, US"");
1449
1450/* Skip white space after = */
1451
1452if (*s == '=') while (isspace((*(++s))));
1453
1454/* If there is a data block and the opt_public flag is not set, change
1455the data block pointer to the private options block. */
1456
1457if (data_block != NULL && (ol->type & opt_public) == 0)
1458 data_block = (void *)(((driver_instance *)data_block)->options_block);
1459
1460/* Now get the data according to the type. */
1461
1462switch (type)
1463 {
1464 /* If a string value is not enclosed in quotes, it consists of
1465 the rest of the current line, verbatim. Otherwise, string escapes
1466 are processed.
1467
1468 A transport is specified as a string, which is then looked up in the
1469 list of transports. A search type is specified as one of a number of
1470 known strings.
1471
1472 A set or rewrite rules for a driver is specified as a string, which is
1473 then parsed into a suitable chain of control blocks.
1474
1475 Uids and gids are specified as strings which are then looked up in the
1476 passwd file. Lists of uids and gids are similarly specified as colon-
1477 separated strings. */
1478
1479 case opt_stringptr:
1480 case opt_uid:
1481 case opt_gid:
1482 case opt_expand_uid:
1483 case opt_expand_gid:
1484 case opt_uidlist:
1485 case opt_gidlist:
1486 case opt_rewrite:
1487
1488 reset_point = sptr = read_string(s, name);
1489
1490 /* Having read a string, we now have several different ways of using it,
1491 depending on the data type, so do another switch. If keeping the actual
1492 string is not required (because it is interpreted), freesptr is set TRUE,
1493 and at the end we reset the pool. */
1494
1495 switch (type)
1496 {
1497 /* If this was a string, set the variable to point to the new string,
1498 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1499 rules, we still keep the string (for printing), and parse the rules into a
1500 control block and flags word. */
1501
1502 case opt_stringptr:
1503 case opt_rewrite:
1504 if (data_block == NULL)
1505 *((uschar **)(ol->value)) = sptr;
1506 else
1507 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1508 freesptr = FALSE;
1509 if (type == opt_rewrite)
1510 {
1511 int sep = 0;
1512 int *flagptr;
1513 uschar *p = sptr;
1514 rewrite_rule **chain;
1515 optionlist *ol3;
1516
1517 sprintf(CS name2, "*%.50s_rules", name);
1518 ol2 = find_option(name2, oltop, last);
1519 sprintf(CS name2, "*%.50s_flags", name);
1520 ol3 = find_option(name2, oltop, last);
1521
1522 if (ol2 == NULL || ol3 == NULL)
1523 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1524 "rewrite rules not available for driver");
1525
1526 if (data_block == NULL)
1527 {
1528 chain = (rewrite_rule **)(ol2->value);
1529 flagptr = (int *)(ol3->value);
1530 }
1531 else
1532 {
1533 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1534 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1535 }
1536
1537 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1538 != NULL)
1539 {
1540 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1541 *chain = next;
1542 chain = &(next->next);
1543 }
1544
1545 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1546 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1547 "non-header rewrite - not allowed at transport time -");
1548 }
1549 break;
1550
1551 /* If it was an expanded uid, see if there is any expansion to be
1552 done by checking for the presence of a $ character. If there is, save it
1553 in the corresponding *expand_user option field. Otherwise, fall through
1554 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1555 of data. */
1556
1557 case opt_expand_uid:
1558 sprintf(CS name2, "*expand_%.50s", name);
1559 ol2 = find_option(name2, oltop, last);
1560 if (ol2 != NULL)
1561 {
1562 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1563
1564 if (data_block == NULL)
1565 *((uschar **)(ol2->value)) = ss;
1566 else
1567 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1568
1569 if (ss != NULL)
1570 {
1571 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1572 freesptr = FALSE;
1573 break;
1574 }
1575 }
1576
1577 /* Look up a fixed uid, and also make use of the corresponding gid
1578 if a passwd entry is returned and the gid has not been set. */
1579
1580 case opt_uid:
1581 if (!route_finduser(sptr, &pw, &uid))
1582 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1583 if (data_block == NULL)
1584 *((uid_t *)(ol->value)) = uid;
1585 else
1586 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1587
1588 /* Set the flag indicating a fixed value is set */
1589
1590 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1591
1592 /* Handle matching gid if we have a passwd entry: done by finding the
1593 same name with terminating "user" changed to "group"; if not found,
1594 ignore. Also ignore if the value is already set. */
1595
1596 if (pw == NULL) break;
1597 Ustrcpy(name+Ustrlen(name)-4, "group");
1598 ol2 = find_option(name, oltop, last);
1599 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1600 (ol2->type & opt_mask) == opt_expand_gid))
1601 {
1602 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1603 if (! *set_flag)
1604 {
1605 if (data_block == NULL)
1606 *((gid_t *)(ol2->value)) = pw->pw_gid;
1607 else
1608 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1609 *set_flag = TRUE;
1610 }
1611 }
1612 break;
1613
1614 /* If it was an expanded gid, see if there is any expansion to be
1615 done by checking for the presence of a $ character. If there is, save it
1616 in the corresponding *expand_user option field. Otherwise, fall through
1617 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1618 of data. */
1619
1620 case opt_expand_gid:
1621 sprintf(CS name2, "*expand_%.50s", name);
1622 ol2 = find_option(name2, oltop, last);
1623 if (ol2 != NULL)
1624 {
1625 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1626
1627 if (data_block == NULL)
1628 *((uschar **)(ol2->value)) = ss;
1629 else
1630 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1631
1632 if (ss != NULL)
1633 {
1634 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1635 freesptr = FALSE;
1636 break;
1637 }
1638 }
1639
1640 /* Handle freestanding gid */
1641
1642 case opt_gid:
1643 if (!route_findgroup(sptr, &gid))
1644 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1645 if (data_block == NULL)
1646 *((gid_t *)(ol->value)) = gid;
1647 else
1648 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1649 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1650 break;
1651
1652 /* If it was a uid list, look up each individual entry, and build
1653 a vector of uids, with a count in the first element. Put the vector
1654 in malloc store so we can free the string. (We are reading into
1655 permanent store already.) */
1656
1657 case opt_uidlist:
1658 {
1659 int count = 1;
1660 uid_t *list;
1661 int ptr = 0;
0925ede6
PH
1662 uschar *p;
1663 uschar *op = expand_string (sptr);
1664
1665 if (op == NULL)
1666 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1667 name, expand_string_message);
059ec3d9 1668
0925ede6 1669 p = op;
059ec3d9 1670 if (*p != 0) count++;
0925ede6 1671 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1672 list = store_malloc(count*sizeof(uid_t));
1673 list[ptr++] = (uid_t)(count - 1);
1674
1675 if (data_block == NULL)
1676 *((uid_t **)(ol->value)) = list;
1677 else
1678 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1679
0925ede6 1680 p = op;
059ec3d9
PH
1681 while (count-- > 1)
1682 {
1683 int sep = 0;
1684 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1685 if (!route_finduser(big_buffer, NULL, &uid))
1686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1687 big_buffer);
1688 list[ptr++] = uid;
1689 }
1690 }
1691 break;
1692
1693 /* If it was a gid list, look up each individual entry, and build
1694 a vector of gids, with a count in the first element. Put the vector
1695 in malloc store so we can free the string. (We are reading into permanent
1696 store already.) */
1697
1698 case opt_gidlist:
1699 {
1700 int count = 1;
1701 gid_t *list;
1702 int ptr = 0;
0925ede6
PH
1703 uschar *p;
1704 uschar *op = expand_string (sptr);
1705
1706 if (op == NULL)
1707 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1708 name, expand_string_message);
059ec3d9 1709
0925ede6 1710 p = op;
059ec3d9 1711 if (*p != 0) count++;
0925ede6 1712 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
059ec3d9
PH
1713 list = store_malloc(count*sizeof(gid_t));
1714 list[ptr++] = (gid_t)(count - 1);
1715
1716 if (data_block == NULL)
1717 *((gid_t **)(ol->value)) = list;
1718 else
1719 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1720
0925ede6 1721 p = op;
059ec3d9
PH
1722 while (count-- > 1)
1723 {
1724 int sep = 0;
1725 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1726 if (!route_findgroup(big_buffer, &gid))
1727 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1728 big_buffer);
1729 list[ptr++] = gid;
1730 }
1731 }
1732 break;
1733 }
1734
1735 /* Release store if the value of the string doesn't need to be kept. */
1736
1737 if (freesptr) store_reset(reset_point);
1738 break;
1739
1740 /* Expanded boolean: if no characters follow, or if there are no dollar
1741 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1742 save the string for later expansion in the alternate place. */
1743
1744 case opt_expand_bool:
1745 if (*s != 0 && Ustrchr(s, '$') != 0)
1746 {
1747 sprintf(CS name2, "*expand_%.50s", name);
1748 ol2 = find_option(name2, oltop, last);
1749 if (ol2 != NULL)
1750 {
1751 reset_point = sptr = read_string(s, name);
1752 if (data_block == NULL)
1753 *((uschar **)(ol2->value)) = sptr;
1754 else
1755 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1756 freesptr = FALSE;
1757 break;
1758 }
1759 }
1760 /* Fall through */
1761
1762 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1763 look for yes/not/true/false. Some booleans are stored in a single bit in
1764 a single int. There's a special fudge for verify settings; without a suffix
1765 they set both xx_sender and xx_recipient. The table points to the sender
1766 value; search subsequently for the recipient. There's another special case:
1767 opt_bool_set also notes when a boolean has been set. */
1768
1769 case opt_bool:
1770 case opt_bit:
1771 case opt_bool_verify:
1772 case opt_bool_set:
1773 if (*s != 0)
1774 {
1775 s = readconf_readname(name2, 64, s);
1776 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1777 boolvalue = TRUE;
1778 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1779 boolvalue = FALSE;
1780 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1781 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1782 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1783 US"for boolean option ", name);
1784 }
1785
1786 /* Handle single-bit type. */
1787
1788 if (type == opt_bit)
1789 {
1790 int bit = 1 << ((ol->type >> 16) & 31);
1791 int *ptr = (data_block == NULL)?
1792 (int *)(ol->value) :
1793 (int *)((uschar *)data_block + (long int)ol->value);
1794 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1795 break;
1796 }
1797
1798 /* Handle full BOOL types */
1799
1800 if (data_block == NULL)
1801 *((BOOL *)(ol->value)) = boolvalue;
1802 else
1803 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1804
1805 /* Verify fudge */
1806
1807 if (type == opt_bool_verify)
1808 {
1809 sprintf(CS name2, "%.50s_recipient", name + offset);
1810 ol2 = find_option(name2, oltop, last);
1811 if (ol2 != NULL)
1812 {
1813 if (data_block == NULL)
1814 *((BOOL *)(ol2->value)) = boolvalue;
1815 else
1816 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1817 }
1818 }
1819
1820 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1821
1822 else if (type == opt_bool_set)
1823 {
1824 sprintf(CS name2, "*set_%.50s", name + offset);
1825 ol2 = find_option(name2, oltop, last);
1826 if (ol2 != NULL)
1827 {
1828 if (data_block == NULL)
1829 *((BOOL *)(ol2->value)) = TRUE;
1830 else
1831 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1832 }
1833 }
1834 break;
1835
1836 /* Octal integer */
1837
1838 case opt_octint:
1839 intbase = 8;
1840 inttype = US"octal ";
1841
1842 /* Integer: a simple(ish) case; allow octal and hex formats, and
1843 suffixes K and M. The different types affect output, not input. */
1844
1845 case opt_mkint:
1846 case opt_int:
1847 {
1848 uschar *endptr;
7e8d92ba
PH
1849 long int lvalue;
1850
059ec3d9 1851 errno = 0;
7e8d92ba 1852 lvalue = strtol(CS s, CSS &endptr, intbase);
059ec3d9
PH
1853
1854 if (endptr == s)
1855 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1856 inttype, name);
1857
1858 if (errno != ERANGE)
1859 {
1860 if (tolower(*endptr) == 'k')
1861 {
7e8d92ba
PH
1862 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1863 else lvalue *= 1024;
059ec3d9
PH
1864 endptr++;
1865 }
1866 else if (tolower(*endptr) == 'm')
1867 {
7e8d92ba 1868 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
059ec3d9 1869 errno = ERANGE;
7e8d92ba 1870 else lvalue *= 1024*1024;
059ec3d9
PH
1871 endptr++;
1872 }
1873 }
1874
7e8d92ba
PH
1875 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1876 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1877 "absolute value of integer \"%s\" is too large (overflow)", s);
059ec3d9
PH
1878
1879 while (isspace(*endptr)) endptr++;
1880 if (*endptr != 0)
1881 extra_chars_error(endptr, inttype, US"integer value for ", name);
7e8d92ba
PH
1882
1883 value = (int)lvalue;
059ec3d9
PH
1884 }
1885
1886 if (data_block == NULL)
1887 *((int *)(ol->value)) = value;
1888 else
1889 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1890 break;
1891
1892 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1893 M. */
1894
1895 case opt_Kint:
1896 {
1897 uschar *endptr;
1898 errno = 0;
1899 value = strtol(CS s, CSS &endptr, intbase);
1900
1901 if (endptr == s)
1902 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1903 inttype, name);
1904
1905 if (errno != ERANGE)
1906 {
1907 if (tolower(*endptr) == 'm')
1908 {
1909 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1910 else value *= 1024;
1911 endptr++;
1912 }
1913 else if (tolower(*endptr) == 'k')
1914 {
1915 endptr++;
1916 }
1917 else
1918 {
1919 value = (value + 512)/1024;
1920 }
1921 }
1922
1923 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1924 "absolute value of integer \"%s\" is too large (overflow)", s);
1925
1926 while (isspace(*endptr)) endptr++;
1927 if (*endptr != 0)
1928 extra_chars_error(endptr, inttype, US"integer value for ", name);
1929 }
1930
1931 if (data_block == NULL)
1932 *((int *)(ol->value)) = value;
1933 else
1934 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1935 break;
1936
1937 /* Fixed-point number: held to 3 decimal places. */
1938
1939 case opt_fixed:
1940 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1941 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1942 "fixed-point number expected for %s", name);
1943
1944 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1945 "integer \"%s\" is too large (overflow)", s);
1946
1947 value *= 1000;
1948
1949 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1950 "integer \"%s\" is too large (overflow)", s);
1951
1952 if (s[count] == '.')
1953 {
1954 int d = 100;
1955 while (isdigit(s[++count]))
1956 {
1957 value += (s[count] - '0') * d;
1958 d /= 10;
1959 }
1960 }
1961
1962 while (isspace(s[count])) count++;
1963
1964 if (s[count] != 0)
1965 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1966
1967 if (data_block == NULL)
1968 *((int *)(ol->value)) = value;
1969 else
1970 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1971 break;
1972
1973 /* There's a special routine to read time values. */
1974
1975 case opt_time:
1976 value = readconf_readtime(s, 0, FALSE);
1977 if (value < 0)
1978 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1979 name);
1980 if (data_block == NULL)
1981 *((int *)(ol->value)) = value;
1982 else
1983 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1984 break;
1985
1986 /* A time list is a list of colon-separated times, with the first
1987 element holding the size of the list and the second the number of
1988 entries used. */
1989
1990 case opt_timelist:
1991 {
1992 int count = 0;
1993 int *list = (data_block == NULL)?
1994 (int *)(ol->value) :
1995 (int *)((uschar *)data_block + (long int)(ol->value));
1996
1997 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1998 {
1999 int terminator = 0;
2000 uschar *snext = Ustrchr(s, ':');
2001 if (snext != NULL)
2002 {
2003 uschar *ss = snext;
2004 while (ss > s && isspace(ss[-1])) ss--;
2005 terminator = *ss;
2006 }
2007 value = readconf_readtime(s, terminator, FALSE);
2008 if (value < 0)
2009 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2010 name);
2011 if (count > 1 && value <= list[count])
2012 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2013 "time value out of order for %s", name);
2014 list[count+1] = value;
2015 if (snext == NULL) break;
2016 s = snext + 1;
2017 while (isspace(*s)) s++;
2018 }
2019
2020 if (count > list[0] - 2)
2021 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2022 name);
2023 if (count > 0 && list[2] == 0) count = 0;
2024 list[1] = count;
2025 }
2026
2027 break;
2028 }
2029
2030return TRUE;
2031}
2032
2033
2034
2035/*************************************************
2036* Print a time value *
2037*************************************************/
2038
2039/*
2040Argument: a time value in seconds
2041Returns: pointer to a fixed buffer containing the time as a string,
2042 in readconf_readtime() format
2043*/
2044
2045uschar *
2046readconf_printtime(int t)
2047{
2048int s, m, h, d, w;
2049uschar *p = time_buffer;
2050
ea49d0e1
PH
2051if (t < 0)
2052 {
2053 *p++ = '-';
2054 t = -t;
2055 }
2056
059ec3d9
PH
2057s = t % 60;
2058t /= 60;
2059m = t % 60;
2060t /= 60;
2061h = t % 24;
2062t /= 24;
2063d = t % 7;
2064w = t/7;
2065
2066if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2067if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2068if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2069if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2070if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2071
2072return time_buffer;
2073}
2074
2075
2076
2077/*************************************************
2078* Print an individual option value *
2079*************************************************/
2080
2081/* This is used by the -bP option, so prints to the standard output.
2082The entire options list is passed in as an argument, because some options come
2083in pairs - typically uid/gid settings, which can either be explicit numerical
2084values, or strings to be expanded later. If the numerical value is unset,
2085search for "*expand_<name>" to see if there is a string equivalent.
2086
2087Arguments:
2088 ol option entry, or NULL for an unknown option
2089 name option name
2090 options_block NULL for main configuration options; otherwise points to
2091 a driver block; if the option doesn't have opt_public
2092 set, then options_block->options_block is where the item
2093 resides.
2094 oltop points to the option list in which ol exists
2095 last one more than the offset of the last entry in optop
2096
2097Returns: nothing
2098*/
2099
2100static void
2101print_ol(optionlist *ol, uschar *name, void *options_block,
2102 optionlist *oltop, int last)
2103{
2104struct passwd *pw;
2105struct group *gr;
2106optionlist *ol2;
2107void *value;
2108uid_t *uidlist;
2109gid_t *gidlist;
2110uschar *s;
2111uschar name2[64];
2112
2113if (ol == NULL)
2114 {
2115 printf("%s is not a known option\n", name);
2116 return;
2117 }
2118
2119/* Non-admin callers cannot see options that have been flagged secure by the
2120"hide" prefix. */
2121
2122if (!admin_user && (ol->type & opt_secure) != 0)
2123 {
2124 printf("%s = <value not displayable>\n", name);
2125 return;
2126 }
2127
2128/* Else show the value of the option */
2129
2130value = ol->value;
2131if (options_block != NULL)
2132 {
2133 if ((ol->type & opt_public) == 0)
2134 options_block = (void *)(((driver_instance *)options_block)->options_block);
2135 value = (void *)((uschar *)options_block + (long int)value);
2136 }
2137
2138switch(ol->type & opt_mask)
2139 {
2140 case opt_stringptr:
2141 case opt_rewrite: /* Show the text value */
2142 s = *((uschar **)value);
2143 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
2144 break;
2145
2146 case opt_int:
2147 printf("%s = %d\n", name, *((int *)value));
2148 break;
2149
2150 case opt_mkint:
2151 {
2152 int x = *((int *)value);
2153 if (x != 0 && (x & 1023) == 0)
2154 {
2155 int c = 'K';
2156 x >>= 10;
2157 if ((x & 1023) == 0)
2158 {
2159 c = 'M';
2160 x >>= 10;
2161 }
2162 printf("%s = %d%c\n", name, x, c);
2163 }
2164 else printf("%s = %d\n", name, x);
2165 }
2166 break;
2167
2168 case opt_Kint:
2169 {
2170 int x = *((int *)value);
2171 if (x == 0) printf("%s = 0\n", name);
2172 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
2173 else printf("%s = %dK\n", name, x);
2174 }
2175 break;
2176
2177 case opt_octint:
2178 printf("%s = %#o\n", name, *((int *)value));
2179 break;
2180
2181 /* Can be negative only when "unset", in which case integer */
2182
2183 case opt_fixed:
2184 {
2185 int x = *((int *)value);
2186 int f = x % 1000;
2187 int d = 100;
2188 if (x < 0) printf("%s =\n", name); else
2189 {
2190 printf("%s = %d.", name, x/1000);
2191 do
2192 {
2193 printf("%d", f/d);
2194 f %= d;
2195 d /= 10;
2196 }
2197 while (f != 0);
2198 printf("\n");
2199 }
2200 }
2201 break;
2202
2203 /* If the numerical value is unset, try for the string value */
2204
2205 case opt_expand_uid:
2206 if (! *get_set_flag(name, oltop, last, options_block))
2207 {
2208 sprintf(CS name2, "*expand_%.50s", name);
2209 ol2 = find_option(name2, oltop, last);
2210 if (ol2 != NULL)
2211 {
2212 void *value2 = ol2->value;
2213 if (options_block != NULL)
2214 value2 = (void *)((uschar *)options_block + (long int)value2);
2215 s = *((uschar **)value2);
2216 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2217 break;
2218 }
2219 }
2220
2221 /* Else fall through */
2222
2223 case opt_uid:
2224 if (! *get_set_flag(name, oltop, last, options_block))
2225 printf("%s =\n", name);
2226 else
2227 {
2228 pw = getpwuid(*((uid_t *)value));
2229 if (pw == NULL)
2230 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2231 else printf("%s = %s\n", name, pw->pw_name);
2232 }
2233 break;
2234
2235 /* If the numerical value is unset, try for the string value */
2236
2237 case opt_expand_gid:
2238 if (! *get_set_flag(name, oltop, last, options_block))
2239 {
2240 sprintf(CS name2, "*expand_%.50s", name);
2241 ol2 = find_option(name2, oltop, last);
2242 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2243 {
2244 void *value2 = ol2->value;
2245 if (options_block != NULL)
2246 value2 = (void *)((uschar *)options_block + (long int)value2);
2247 s = *((uschar **)value2);
2248 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2249 break;
2250 }
2251 }
2252
2253 /* Else fall through */
2254
2255 case opt_gid:
2256 if (! *get_set_flag(name, oltop, last, options_block))
2257 printf("%s =\n", name);
2258 else
2259 {
2260 gr = getgrgid(*((int *)value));
2261 if (gr == NULL)
2262 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2263 else printf("%s = %s\n", name, gr->gr_name);
2264 }
2265 break;
2266
2267 case opt_uidlist:
2268 uidlist = *((uid_t **)value);
2269 printf("%s =", name);
2270 if (uidlist != NULL)
2271 {
2272 int i;
2273 uschar sep = ' ';
2274 for (i = 1; i <= (int)(uidlist[0]); i++)
2275 {
2276 uschar *name = NULL;
2277 pw = getpwuid(uidlist[i]);
2278 if (pw != NULL) name = US pw->pw_name;
2279 if (name != NULL) printf("%c%s", sep, name);
2280 else printf("%c%ld", sep, (long int)(uidlist[i]));
2281 sep = ':';
2282 }
2283 }
2284 printf("\n");
2285 break;
2286
2287 case opt_gidlist:
2288 gidlist = *((gid_t **)value);
2289 printf("%s =", name);
2290 if (gidlist != NULL)
2291 {
2292 int i;
2293 uschar sep = ' ';
2294 for (i = 1; i <= (int)(gidlist[0]); i++)
2295 {
2296 uschar *name = NULL;
2297 gr = getgrgid(gidlist[i]);
2298 if (gr != NULL) name = US gr->gr_name;
2299 if (name != NULL) printf("%c%s", sep, name);
2300 else printf("%c%ld", sep, (long int)(gidlist[i]));
2301 sep = ':';
2302 }
2303 }
2304 printf("\n");
2305 break;
2306
2307 case opt_time:
2308 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2309 break;
2310
2311 case opt_timelist:
2312 {
2313 int i;
2314 int *list = (int *)value;
2315 printf("%s = ", name);
2316 for (i = 0; i < list[1]; i++)
2317 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2318 printf("\n");
2319 }
2320 break;
2321
2322 case opt_bit:
2323 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2324 "" : "no_", name);
2325 break;
2326
2327 case opt_expand_bool:
2328 sprintf(CS name2, "*expand_%.50s", name);
2329 ol2 = find_option(name2, oltop, last);
2330 if (ol2 != NULL && ol2->value != NULL)
2331 {
2332 void *value2 = ol2->value;
2333 if (options_block != NULL)
2334 value2 = (void *)((uschar *)options_block + (long int)value2);
2335 s = *((uschar **)value2);
2336 if (s != NULL)
2337 {
2338 printf("%s = %s\n", name, string_printing(s));
2339 break;
2340 }
2341 /* s == NULL => string not set; fall through */
2342 }
2343
2344 /* Fall through */
2345
2346 case opt_bool:
2347 case opt_bool_verify:
2348 case opt_bool_set:
2349 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2350 break;
2351 }
2352}
2353
2354
2355
2356/*************************************************
2357* Print value from main configuration *
2358*************************************************/
2359
2360/* This function, called as a result of encountering the -bP option,
2361causes the value of any main configuration variable to be output if the
2362second argument is NULL. There are some special values:
2363
2364 all print all main configuration options
2365 configure_file print the name of the configuration file
2366 routers print the routers' configurations
2367 transports print the transports' configuration
2368 authenticators print the authenticators' configuration
2369 router_list print a list of router names
2370 transport_list print a list of transport names
2371 authenticator_list print a list of authentication mechanism names
2372 +name print a named list item
2373 local_scan print the local_scan options
2374
2375If the second argument is not NULL, it must be one of "router", "transport", or
2376"authenticator" in which case the first argument identifies the driver whose
2377options are to be printed.
2378
2379Arguments:
2380 name option name if type == NULL; else driver name
2381 type NULL or driver type name, as described above
2382
2383Returns: nothing
2384*/
2385
2386void
2387readconf_print(uschar *name, uschar *type)
2388{
2389BOOL names_only = FALSE;
2390optionlist *ol;
2391optionlist *ol2 = NULL;
2392driver_instance *d = NULL;
2393int size = 0;
2394
2395if (type == NULL)
2396 {
2397 if (*name == '+')
2398 {
2399 int i;
2400 tree_node *t;
2401 BOOL found = FALSE;
2402 static uschar *types[] = { US"address", US"domain", US"host",
2403 US"localpart" };
2404 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2405 &hostlist_anchor, &localpartlist_anchor };
2406
2407 for (i = 0; i < 4; i++)
2408 {
2409 t = tree_search(*(anchors[i]), name+1);
2410 if (t != NULL)
2411 {
2412 found = TRUE;
2413 printf("%slist %s = %s\n", types[i], name+1,
2414 ((namedlist_block *)(t->data.ptr))->string);
2415 }
2416 }
2417
2418 if (!found)
2419 printf("no address, domain, host, or local part list called \"%s\" "
2420 "exists\n", name+1);
2421
2422 return;
2423 }
2424
2425 if (Ustrcmp(name, "configure_file") == 0)
2426 {
2427 printf("%s\n", CS config_main_filename);
2428 return;
2429 }
2430
2431 if (Ustrcmp(name, "all") == 0)
2432 {
2433 for (ol = optionlist_config;
2434 ol < optionlist_config + optionlist_config_size; ol++)
2435 {
2436 if ((ol->type & opt_hidden) == 0)
2437 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2438 }
2439 return;
2440 }
2441
2442 if (Ustrcmp(name, "local_scan") == 0)
2443 {
2444 #ifndef LOCAL_SCAN_HAS_OPTIONS
2445 printf("local_scan() options are not supported\n");
2446 #else
2447 for (ol = local_scan_options;
2448 ol < local_scan_options + local_scan_options_count; ol++)
2449 {
2450 print_ol(ol, US ol->name, NULL, local_scan_options,
2451 local_scan_options_count);
2452 }
2453 #endif
2454 return;
2455 }
2456
2457 if (Ustrcmp(name, "routers") == 0)
2458 {
2459 type = US"router";
2460 name = NULL;
2461 }
2462 else if (Ustrcmp(name, "transports") == 0)
2463 {
2464 type = US"transport";
2465 name = NULL;
2466 }
2467
2468 else if (Ustrcmp(name, "authenticators") == 0)
2469 {
2470 type = US"authenticator";
2471 name = NULL;
2472 }
2473
2474 else if (Ustrcmp(name, "authenticator_list") == 0)
2475 {
2476 type = US"authenticator";
2477 name = NULL;
2478 names_only = TRUE;
2479 }
2480
2481 else if (Ustrcmp(name, "router_list") == 0)
2482 {
2483 type = US"router";
2484 name = NULL;
2485 names_only = TRUE;
2486 }
2487 else if (Ustrcmp(name, "transport_list") == 0)
2488 {
2489 type = US"transport";
2490 name = NULL;
2491 names_only = TRUE;
2492 }
2493 else
2494 {
2495 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2496 name, NULL, optionlist_config, optionlist_config_size);
2497 return;
2498 }
2499 }
2500
2501/* Handle the options for a router or transport. Skip options that are flagged
2502as hidden. Some of these are options with names starting with '*', used for
2503internal alternative representations of other options (which the printing
2504function will sort out). Others are synonyms kept for backward compatibility.
2505*/
2506
2507if (Ustrcmp(type, "router") == 0)
2508 {
2509 d = (driver_instance *)routers;
2510 ol2 = optionlist_routers;
2511 size = optionlist_routers_size;
2512 }
2513else if (Ustrcmp(type, "transport") == 0)
2514 {
2515 d = (driver_instance *)transports;
2516 ol2 = optionlist_transports;
2517 size = optionlist_transports_size;
2518 }
2519else if (Ustrcmp(type, "authenticator") == 0)
2520 {
2521 d = (driver_instance *)auths;
2522 ol2 = optionlist_auths;
2523 size = optionlist_auths_size;
2524 }
2525
2526if (names_only)
2527 {
2528 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2529 return;
2530 }
2531
2532/* Either search for a given driver, or print all of them */
2533
2534for (; d != NULL; d = d->next)
2535 {
2536 if (name == NULL)
2537 printf("\n%s %s:\n", d->name, type);
2538 else if (Ustrcmp(d->name, name) != 0) continue;
2539
2540 for (ol = ol2; ol < ol2 + size; ol++)
2541 {
2542 if ((ol->type & opt_hidden) == 0)
2543 print_ol(ol, US ol->name, d, ol2, size);
2544 }
2545
2546 for (ol = d->info->options;
2547 ol < d->info->options + *(d->info->options_count); ol++)
2548 {
2549 if ((ol->type & opt_hidden) == 0)
2550 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2551 }
2552 if (name != NULL) return;
2553 }
2554if (name != NULL) printf("%s %s not found\n", type, name);
2555}
2556
2557
2558
2559/*************************************************
2560* Read a named list item *
2561*************************************************/
2562
2563/* This function reads a name and a list (i.e. string). The name is used to
2564save the list in a tree, sorted by its name. Each entry also has a number,
2565which can be used for caching tests, but if the string contains any expansion
2566items other than $key, the number is set negative to inhibit caching. This
2567mechanism is used for domain, host, and address lists that are referenced by
2568the "+name" syntax.
2569
2570Arguments:
2571 anchorp points to the tree anchor
2572 numberp points to the current number for this tree
2573 max the maximum number permitted
2574 s the text of the option line, starting immediately after the name
2575 of the list type
2576 tname the name of the list type, for messages
2577
2578Returns: nothing
2579*/
2580
2581static void
2582read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2583 uschar *tname)
2584{
2585BOOL forcecache = FALSE;
2586uschar *ss;
2587tree_node *t;
2588namedlist_block *nb = store_get(sizeof(namedlist_block));
2589
2590if (Ustrncmp(s, "_cache", 6) == 0)
2591 {
2592 forcecache = TRUE;
2593 s += 6;
2594 }
2595
2596if (!isspace(*s))
2597 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2598
2599if (*numberp >= max)
2600 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2601 tname, max);
2602
2603while (isspace(*s)) s++;
2604ss = s;
2605while (isalnum(*s) || *s == '_') s++;
2606t = store_get(sizeof(tree_node) + s-ss);
2607Ustrncpy(t->name, ss, s-ss);
2608t->name[s-ss] = 0;
2609while (isspace(*s)) s++;
2610
2611if (!tree_insertnode(anchorp, t))
2612 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2613 "duplicate name \"%s\" for a named %s", t->name, tname);
2614
2615t->data.ptr = nb;
2616nb->number = *numberp;
2617*numberp += 1;
2618
2619if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2620 "missing '=' after \"%s\"", t->name);
2621while (isspace(*s)) s++;
2622nb->string = read_string(s, t->name);
2623nb->cache_data = NULL;
2624
2625/* Check the string for any expansions; if any are found, mark this list
2626uncacheable unless the user has explicited forced caching. */
2627
2628if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2629}
2630
2631
2632
2633
2634/*************************************************
2635* Unpick data for a rate limit *
2636*************************************************/
2637
2638/* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2639separate values.
2640
2641Arguments:
2642 s string, in the form t,b,f,l
2643 where t is the threshold (integer)
2644 b is the initial delay (time)
2645 f is the multiplicative factor (fixed point)
2646 k is the maximum time (time)
2647 threshold where to store threshold
2648 base where to store base in milliseconds
2649 factor where to store factor in milliseconds
2650 limit where to store limit
2651
2652Returns: nothing (panics on error)
2653*/
2654
2655static void
2656unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2657 int *limit)
2658{
2659uschar bstring[16], lstring[16];
2660
2661if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2662 factor, lstring) == 4)
2663 {
2664 *base = readconf_readtime(bstring, 0, TRUE);
2665 *limit = readconf_readtime(lstring, 0, TRUE);
2666 if (*base >= 0 && *limit >= 0) return;
2667 }
2668log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2669}
2670
2671
2672
2673
2674/*************************************************
2675* Read main configuration options *
2676*************************************************/
2677
2678/* This function is the first to be called for configuration reading. It
2679opens the configuration file and reads general configuration settings until
2680it reaches the end of the configuration section. The file is then left open so
2681that the remaining configuration data can subsequently be read if needed for
2682this run of Exim.
2683
2684The configuration file must be owned either by root or exim, and be writeable
2685only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2686in the config file, so the test is done on the compiled in values. A slight
2687anomaly, to be carefully documented.
2688
2689The name of the configuration file is taken from a list that is included in the
2690binary of Exim. It can be altered from the command line, but if that is done,
2691root privilege is immediately withdrawn unless the caller is root or exim.
2692The first file on the list that exists is used.
2693
2694For use on multiple systems that share file systems, first look for a
2695configuration file whose name has the current node name on the end. If that is
2696not found, try the generic name. For really contorted configurations, that run
2697multiple Exims with different uid settings, first try adding the effective uid
2698before the node name. These complications are going to waste resources on most
2699systems. Therefore they are available only when requested by compile-time
2700options. */
2701
2702void
2703readconf_main(void)
2704{
2705int sep = 0;
2706struct stat statbuf;
2707uschar *s, *filename;
2708uschar *list = config_main_filelist;
2709
2710/* Loop through the possible file names */
2711
2712while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2713 != NULL)
2714 {
2715 /* Cut out all the fancy processing unless specifically wanted */
2716
2717 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2718 uschar *suffix = filename + Ustrlen(filename);
2719
2720 /* Try for the node-specific file if a node name exists */
2721
2722 #ifdef CONFIGURE_FILE_USE_NODE
2723 struct utsname uts;
2724 if (uname(&uts) >= 0)
2725 {
2726 #ifdef CONFIGURE_FILE_USE_EUID
2727 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2728 config_file = Ufopen(filename, "rb");
2729 if (config_file == NULL)
2730 #endif /* CONFIGURE_FILE_USE_EUID */
2731 {
2732 sprintf(CS suffix, ".%.256s", uts.nodename);
2733 config_file = Ufopen(filename, "rb");
2734 }
2735 }
2736 #endif /* CONFIGURE_FILE_USE_NODE */
2737
2738 /* Otherwise, try the generic name, possibly with the euid added */
2739
2740 #ifdef CONFIGURE_FILE_USE_EUID
2741 if (config_file == NULL)
2742 {
2743 sprintf(CS suffix, ".%ld", (long int)original_euid);
2744 config_file = Ufopen(filename, "rb");
2745 }
2746 #endif /* CONFIGURE_FILE_USE_EUID */
2747
2748 /* Finally, try the unadorned name */
2749
2750 if (config_file == NULL)
2751 {
2752 *suffix = 0;
2753 config_file = Ufopen(filename, "rb");
2754 }
2755 #else /* if neither defined */
2756
2757 /* This is the common case when the fancy processing is not included. */
2758
2759 config_file = Ufopen(filename, "rb");
2760 #endif
2761
2762 /* If the file does not exist, continue to try any others. For any other
2763 error, break out (and die). */
2764
2765 if (config_file != NULL || errno != ENOENT) break;
2766 }
2767
2768/* On success, save the name for verification; config_filename is used when
2769logging configuration errors (it changes for .included files) whereas
2770config_main_filename is the name shown by -bP. Failure to open a configuration
2771file is a serious disaster. */
2772
2773if (config_file != NULL)
2774 {
2775 config_filename = config_main_filename = string_copy(filename);
2776 }
2777else
2778 {
2779 if (filename == NULL)
2780 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2781 "%s", config_main_filelist);
2782 else
2783 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2784 "configuration file %s", filename));
2785 }
2786
2787/* Check the status of the file we have opened, unless it was specified on
2788the command line, in which case privilege was given away at the start. */
2789
2790if (!config_changed)
2791 {
2792 if (fstat(fileno(config_file), &statbuf) != 0)
2793 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2794 big_buffer);
2795
2796 if ((statbuf.st_uid != root_uid && /* owner not root */
2797 statbuf.st_uid != exim_uid /* owner not exim */
2798 #ifdef CONFIGURE_OWNER
2799 && statbuf.st_uid != config_uid /* owner not the special one */
2800 #endif
2801 ) || /* or */
35edf2ff
PH
2802 (statbuf.st_gid != exim_gid /* group not exim & */
2803 #ifdef CONFIGURE_GROUP
2804 && statbuf.st_gid != config_gid /* group not the special one */
8e669ac1 2805 #endif
35edf2ff 2806 && (statbuf.st_mode & 020) != 0) || /* group writeable */
059ec3d9
PH
2807 /* or */
2808 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2809
2810 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2811 "wrong owner, group, or mode", big_buffer);
2812 }
2813
2814/* Process the main configuration settings. They all begin with a lower case
2815letter. If we see something starting with an upper case letter, it is taken as
2816a macro definition. */
2817
2818while ((s = get_config_line()) != NULL)
2819 {
cf00dad6 2820 if (isupper(s[0])) read_macro_assignment(s);
059ec3d9
PH
2821
2822 else if (Ustrncmp(s, "domainlist", 10) == 0)
2823 read_named_list(&domainlist_anchor, &domainlist_count,
2824 MAX_NAMED_LIST, s+10, US"domain list");
2825
2826 else if (Ustrncmp(s, "hostlist", 8) == 0)
2827 read_named_list(&hostlist_anchor, &hostlist_count,
2828 MAX_NAMED_LIST, s+8, US"host list");
2829
2830 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2831 read_named_list(&addresslist_anchor, &addresslist_count,
2832 MAX_NAMED_LIST, s+11, US"address list");
2833
2834 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2835 read_named_list(&localpartlist_anchor, &localpartlist_count,
2836 MAX_NAMED_LIST, s+13, US"local part list");
2837
2838 else
2839 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2840 NULL, US"main option \"%s\" unknown");
2841 }
2842
2843
2844/* If local_sender_retain is set, local_from_check must be unset. */
2845
2846if (local_sender_retain && local_from_check)
2847 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2848 "local_sender_retain are set; this combination is not allowed");
2849
2850/* If the timezone string is empty, set it to NULL, implying no TZ variable
2851wanted. */
2852
2853if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2854
944a9c55
PH
2855/* The max retry interval must not be greater than 24 hours. */
2856
2857if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
2858
059ec3d9
PH
2859/* remote_max_parallel must be > 0 */
2860
2861if (remote_max_parallel <= 0) remote_max_parallel = 1;
2862
6a3f1455
PH
2863/* Save the configured setting of freeze_tell, so we can re-instate it at the
2864start of a new SMTP message. */
2865
2866freeze_tell_config = freeze_tell;
2867
059ec3d9
PH
2868/* The primary host name may be required for expansion of spool_directory
2869and log_file_path, so make sure it is set asap. It is obtained from uname(),
2870but if that yields an unqualified value, make a FQDN by using gethostbyname to
2871canonize it. Some people like upper case letters in their host names, so we
2872don't force the case. */
2873
2874if (primary_hostname == NULL)
2875 {
2876 uschar *hostname;
2877 struct utsname uts;
2878 if (uname(&uts) < 0)
2879 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2880 hostname = US uts.nodename;
2881
2882 if (Ustrchr(hostname, '.') == NULL)
2883 {
2884 int af = AF_INET;
2885 struct hostent *hostdata;
2886
2887 #if HAVE_IPV6
7e66e54d 2888 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
059ec3d9 2889 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
7e66e54d 2890 TRUE, NULL) != OK))
059ec3d9
PH
2891 af = AF_INET6;
2892 #else
2893 af = AF_INET;
2894 #endif
2895
2896 for (;;)
2897 {
2898 #if HAVE_IPV6
2899 #if HAVE_GETIPNODEBYNAME
2900 int error_num;
2901 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2902 #else
2903 hostdata = gethostbyname2(CS hostname, af);
2904 #endif
2905 #else
2906 hostdata = gethostbyname(CS hostname);
2907 #endif
2908
2909 if (hostdata != NULL)
2910 {
2911 hostname = US hostdata->h_name;
2912 break;
2913 }
2914
2915 if (af == AF_INET) break;
2916 af = AF_INET;
2917 }
2918 }
2919
2920 primary_hostname = string_copy(hostname);
2921 }
2922
2923/* Set up default value for smtp_active_hostname */
2924
2925smtp_active_hostname = primary_hostname;
2926
2927/* If spool_directory wasn't set in the build-time configuration, it must have
2928got set above. Of course, writing to the log may not work if log_file_path is
2929not set, but it will at least get to syslog or somewhere, with any luck. */
2930
2931if (*spool_directory == 0)
2932 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2933 "proceed");
2934
2935/* Expand the spool directory name; it may, for example, contain the primary
2936host name. Same comment about failure. */
2937
2938s = expand_string(spool_directory);
2939if (s == NULL)
2940 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2941 "\"%s\": %s", spool_directory, expand_string_message);
2942spool_directory = s;
2943
2944/* Expand log_file_path, which must contain "%s" in any component that isn't
2945the null string or "syslog". It is also allowed to contain one instance of %D.
2946However, it must NOT contain % followed by anything else. */
2947
2948if (*log_file_path != 0)
2949 {
2950 uschar *ss, *sss;
2951 int sep = ':'; /* Fixed for log file path */
2952 s = expand_string(log_file_path);
2953 if (s == NULL)
2954 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2955 "\"%s\": %s", log_file_path, expand_string_message);
2956
2957 ss = s;
2958 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2959 {
2960 uschar *t;
2961 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2962 t = Ustrstr(sss, "%s");
2963 if (t == NULL)
2964 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2965 "contain \"%%s\"", sss);
2966 *t = 'X';
2967 t = Ustrchr(sss, '%');
2968 if (t != NULL)
2969 {
2970 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2971 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2972 "unexpected \"%%\" character", s);
2973 }
2974 }
2975
2976 log_file_path = s;
2977 }
2978
2979/* Interpret syslog_facility into an integer argument for 'ident' param to
2980openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2981leading "log_". */
2982
2983if (syslog_facility_str != NULL)
2984 {
2985 int i;
2986 uschar *s = syslog_facility_str;
2987
2988 if ((Ustrlen(syslog_facility_str) >= 4) &&
2989 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2990 s += 4;
2991
2992 for (i = 0; i < syslog_list_size; i++)
2993 {
2994 if (strcmpic(s, syslog_list[i].name) == 0)
2995 {
2996 syslog_facility = syslog_list[i].value;
2997 break;
2998 }
2999 }
3000
3001 if (i >= syslog_list_size)
3002 {
3003 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3004 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3005 }
3006 }
3007
3008/* Expand pid_file_path */
3009
3010if (*pid_file_path != 0)
3011 {
3012 s = expand_string(pid_file_path);
3013 if (s == NULL)
3014 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3015 "\"%s\": %s", pid_file_path, expand_string_message);
3016 pid_file_path = s;
3017 }
3018
3019/* Compile the regex for matching a UUCP-style "From_" line in an incoming
3020message. */
3021
3022regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3023
3024/* Unpick the SMTP rate limiting options, if set */
3025
3026if (smtp_ratelimit_mail != NULL)
3027 {
3028 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3029 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3030 }
3031
3032if (smtp_ratelimit_rcpt != NULL)
3033 {
3034 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3035 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3036 }
3037
3038/* The qualify domains default to the primary host name */
3039
3040if (qualify_domain_sender == NULL)
3041 qualify_domain_sender = primary_hostname;
3042if (qualify_domain_recipient == NULL)
3043 qualify_domain_recipient = qualify_domain_sender;
3044
3045/* Setting system_filter_user in the configuration sets the gid as well if a
3046name is given, but a numerical value does not. */
3047
3048if (system_filter_uid_set && !system_filter_gid_set)
3049 {
3050 struct passwd *pw = getpwuid(system_filter_uid);
3051 if (pw == NULL)
3052 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3053 (long int)system_filter_uid);
3054 system_filter_gid = pw->pw_gid;
3055 system_filter_gid_set = TRUE;
3056 }
3057
3058/* If the errors_reply_to field is set, check that it is syntactically valid
3059and ensure it contains a domain. */
3060
3061if (errors_reply_to != NULL)
3062 {
3063 uschar *errmess;
3064 int start, end, domain;
3065 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3066 &start, &end, &domain, FALSE);
3067
3068 if (recipient == NULL)
3069 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3070 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3071
3072 if (domain == 0)
3073 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3074 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3075 }
3076
3077/* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3078smtp_accept_max must also be set. */
3079
3080if (smtp_accept_max == 0 &&
3081 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3082 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3083 "smtp_accept_max must be set if smtp_accept_queue or "
3084 "smtp_accept_max_per_host is set");
3085
3086/* Set up the host number if anything is specified. It is an expanded string
3087so that it can be computed from the host name, for example. We do this last
3088so as to ensure that everything else is set up before the expansion. */
3089
3090if (host_number_string != NULL)
3091 {
3092 uschar *end;
3093 uschar *s = expand_string(host_number_string);
3094 long int n = Ustrtol(s, &end, 0);
3095 while (isspace(*end)) end++;
3096 if (*end != 0)
3097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3098 "localhost_number value is not a number: %s", s);
3099 if (n > LOCALHOST_MAX)
3100 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3101 "localhost_number is greater than the maximum allowed value (%d)",
3102 LOCALHOST_MAX);
3103 host_number = n;
3104 }
3105
3106#ifdef SUPPORT_TLS
3107/* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3108
3109if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3110 tls_verify_certificates == NULL)
3111 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3112 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3113 (tls_verify_hosts != NULL)? "" : "try_");
3114#endif
3115}
3116
3117
3118
3119/*************************************************
3120* Initialize one driver *
3121*************************************************/
3122
3123/* This is called once the driver's generic options, if any, have been read.
3124We can now find the driver, set up defaults for the private options, and
3125unset any "set" bits in the private options table (which might have been
3126set by another incarnation of the same driver).
3127
3128Arguments:
3129 d pointer to driver instance block, with generic
3130 options filled in
3131 drivers_available vector of available drivers
3132 size_of_info size of each block in drivers_available
3133 class class of driver, for error message
3134
3135Returns: pointer to the driver info block
3136*/
3137
3138static driver_info *
3139init_driver(driver_instance *d, driver_info *drivers_available,
3140 int size_of_info, uschar *class)
3141{
3142driver_info *dd;
3143
3144for (dd = drivers_available; dd->driver_name[0] != 0;
3145 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3146 {
3147 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3148 {
3149 int i;
3150 int len = dd->options_len;
3151 d->info = dd;
3152 d->options_block = store_get(len);
3153 memcpy(d->options_block, dd->options_block, len);
3154 for (i = 0; i < *(dd->options_count); i++)
3155 dd->options[i].type &= ~opt_set;
3156 return dd;
3157 }
3158 }
3159
3160log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3161 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3162
3163return NULL; /* never obeyed */
3164}
3165
3166
3167
3168
3169/*************************************************
3170* Initialize driver list *
3171*************************************************/
3172
3173/* This function is called for routers, transports, and authentication
3174mechanisms. It reads the data from the current point in the configuration file
3175up to the end of the section, and sets up a chain of instance blocks according
3176to the file's contents. The file will already have been opened by a call to
3177readconf_main, and must be left open for subsequent reading of further data.
3178
3179Any errors cause a panic crash. Note that the blocks with names driver_info and
3180driver_instance must map the first portions of all the _info and _instance
3181blocks for this shared code to work.
3182
3183Arguments:
3184 class "router", "transport", or "authenticator"
3185 anchor &routers, &transports, &auths
3186 drivers_available available drivers
3187 size_of_info size of each info block
3188 instance_default points to default data for an instance
3189 instance_size size of instance block
3190 driver_optionlist generic option list
3191 driver_optionlist_count count of generic option list
3192
3193Returns: nothing
3194*/
3195
3196void
3197readconf_driver_init(
3198 uschar *class,
3199 driver_instance **anchor,
3200 driver_info *drivers_available,
3201 int size_of_info,
3202 void *instance_default,
3203 int instance_size,
3204 optionlist *driver_optionlist,
3205 int driver_optionlist_count)
3206{
3207driver_instance **p = anchor;
3208driver_instance *d = NULL;
3209uschar *buffer;
3210
059ec3d9
PH
3211while ((buffer = get_config_line()) != NULL)
3212 {
3213 uschar name[64];
cf00dad6 3214 uschar *s;
059ec3d9 3215
cf00dad6
PH
3216 /* Read the first name on the line and test for the start of a new driver. A
3217 macro definition indicates the end of the previous driver. If this isn't the
3218 start of a new driver, the line will be re-read. */
059ec3d9 3219
cf00dad6
PH
3220 s = readconf_readname(name, sizeof(name), buffer);
3221
3222 /* Handle macro definition, first finishing off the initialization of the
3223 previous driver, if any. */
3224
3225 if (isupper(*name) && *s == '=')
3226 {
3227 if (d != NULL)
3228 {
3229 if (d->driver_name == NULL)
3230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3231 "no driver defined for %s \"%s\"", class, d->name);
3232 (d->info->init)(d);
3233 d = NULL;
3234 }
3235 read_macro_assignment(buffer);
3236 continue;
3237 }
059ec3d9
PH
3238
3239 /* If the line starts with a name terminated by a colon, we are at the
3240 start of the definition of a new driver. The rest of the line must be
3241 blank. */
3242
3243 if (*s++ == ':')
3244 {
3245 int i;
3246
3247 /* Finish off initializing the previous driver. */
3248
3249 if (d != NULL)
3250 {
3251 if (d->driver_name == NULL)
3252 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3253 "no driver defined for %s \"%s\"", class, d->name);
3254 (d->info->init)(d);
3255 }
3256
3257 /* Check that we haven't already got a driver of this name */
3258
3259 for (d = *anchor; d != NULL; d = d->next)
3260 if (Ustrcmp(name, d->name) == 0)
3261 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3262 "there are two %ss called \"%s\"", class, name);
3263
3264 /* Set up a new driver instance data block on the chain, with
3265 its default values installed. */
3266
3267 d = store_get(instance_size);
3268 memcpy(d, instance_default, instance_size);
3269 *p = d;
3270 p = &(d->next);
3271 d->name = string_copy(name);
3272
3273 /* Clear out the "set" bits in the generic options */
3274
3275 for (i = 0; i < driver_optionlist_count; i++)
3276 driver_optionlist[i].type &= ~opt_set;
3277
3278 /* Check nothing more on this line, then do the next loop iteration. */
3279
3280 while (isspace(*s)) s++;
3281 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3282 continue;
3283 }
3284
cf00dad6
PH
3285 /* Not the start of a new driver. Give an error if we have not set up a
3286 current driver yet. */
059ec3d9
PH
3287
3288 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3289 "%s name missing", class);
3290
3291 /* First look to see if this is a generic option; if it is "driver",
3292 initialize the driver. If is it not a generic option, we can look for a
3293 private option provided that the driver has been previously set up. */
3294
3295 if (readconf_handle_option(buffer, driver_optionlist,
3296 driver_optionlist_count, d, NULL))
3297 {
3298 if (d->info == NULL && d->driver_name != NULL)
3299 init_driver(d, drivers_available, size_of_info, class);
3300 }
3301
3302 /* Handle private options - pass the generic block because some may
3303 live therein. A flag with each option indicates if it is in the public
3304 block. */
3305
3306 else if (d->info != NULL)
3307 {
3308 readconf_handle_option(buffer, d->info->options,
3309 *(d->info->options_count), d, US"option \"%s\" unknown");
3310 }
3311
3312 /* The option is not generic and the driver name has not yet been given. */
3313
3314 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3315 "(\"driver\" must be specified before any private options)", name);
3316 }
3317
3318/* Run the initialization function for the final driver. */
3319
3320if (d != NULL)
3321 {
3322 if (d->driver_name == NULL)
3323 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3324 "no driver defined for %s \"%s\"", class, d->name);
3325 (d->info->init)(d);
3326 }
3327}
3328
3329
3330
3331/*************************************************
3332* Check driver dependency *
3333*************************************************/
3334
3335/* This function is passed a driver instance and a string. It checks whether
3336any of the string options for the driver contains the given string as an
3337expansion variable.
3338
3339Arguments:
3340 d points to a driver instance block
3341 s the string to search for
3342
3343Returns: TRUE if a dependency is found
3344*/
3345
3346BOOL
3347readconf_depends(driver_instance *d, uschar *s)
3348{
3349int count = *(d->info->options_count);
3350optionlist *ol;
3351uschar *ss;
3352
3353for (ol = d->info->options; ol < d->info->options + count; ol++)
3354 {
3355 void *options_block;
3356 uschar *value;
3357 int type = ol->type & opt_mask;
3358 if (type != opt_stringptr) continue;
3359 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3360 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3361 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3362 {
3363 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3364 isalnum(ss[Ustrlen(s)])) continue;
3365 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3366 d->name, ol->name, s);
3367 return TRUE;
3368 }
3369 }
3370
3371DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3372return FALSE;
3373}
3374
3375
3376
3377
3378/*************************************************
3379* Decode an error type for retries *
3380*************************************************/
3381
3382/* This function is global because it is also called from the main
3383program when testing retry information. It decodes strings such as "quota_7d"
3384into numerical error codes.
3385
3386Arguments:
3387 pp points to start of text
3388 p points past end of text
3389 basic_errno points to an int to receive the main error number
3390 more_errno points to an int to receive the secondary error data
3391
3392Returns: NULL if decoded correctly; else points to error text
3393*/
3394
3395uschar *
3396readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3397{
3398int len;
3399uschar *q = pp;
3400while (q < p && *q != '_') q++;
3401len = q - pp;
3402
3403if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3404 {
3405 *basic_errno = ERRNO_EXIMQUOTA;
3406 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3407 return US"bad time value";
3408 }
3409
3410else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3411 {
3412 *basic_errno = ECONNREFUSED;
3413 if (q != p)
3414 {
3415 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3416 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3417 else return US"A or MX expected after \"refused\"";
3418 }
3419 }
3420
3421else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3422 {
3423 *basic_errno = ETIMEDOUT;
3424 if (q != p)
3425 {
3426 int i;
3427 int xlen = p - q - 1;
3428 uschar *x = q + 1;
3429
3430 static uschar *extras[] =
3431 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3432 static int values[] =
3433 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3434
3435 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3436 {
3437 if (strncmpic(x, extras[i], xlen) == 0)
3438 {
3439 *more_errno = values[i];
3440 break;
3441 }
3442 }
3443
3444 if (i >= sizeof(extras)/sizeof(uschar *))
3445 {
3446 if (strncmpic(x, US"DNS", xlen) == 0)
3447 {
3448 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3449 "available in retry rules (it has never worked) - treated as "
3450 "\"timeout\"");
3451 }
3452 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3453 }
3454 }
3455 }
3456
e97957bc
PH
3457else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3458 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3459 strncmpic(pp, US"data_4", 6) == 0)
059ec3d9
PH
3460 {
3461 BOOL bad = FALSE;
3462 int x = 255; /* means "any 4xx code" */
3463 if (p != pp + 8) bad = TRUE; else
3464 {
3465 int a = pp[6], b = pp[7];
3466 if (isdigit(a))
3467 {
3468 x = (a - '0') * 10;
3469 if (isdigit(b)) x += b - '0';
3470 else if (b == 'x') x += 100;
3471 else bad = TRUE;
3472 }
3473 else if (a != 'x' || b != 'x') bad = TRUE;
3474 }
3475
e97957bc
PH
3476 if (bad)
3477 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3478 "x is literal and d is any digit", pp);
059ec3d9 3479
e97957bc
PH
3480 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3481 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
059ec3d9
PH
3482 *more_errno = x << 8;
3483 }
3484
3485else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3486 strncmpic(q+1, US"failed", p-q-1) == 0)
059ec3d9 3487 *basic_errno = ERRNO_AUTHFAIL;
e97957bc 3488
48da4259 3489else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
e97957bc
PH
3490 *basic_errno = ERRNO_SMTPCLOSED;
3491
48da4259 3492else if (strncmpic(pp, US"tls_required", p - pp) == 0)
e97957bc 3493 *basic_errno = ERRNO_TLSREQUIRED;
059ec3d9
PH
3494
3495else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3496 return string_sprintf("unknown or malformed retry error \"%.*s\"", p-pp, pp);
3497
3498return NULL;
3499}
3500
3501
3502
3503
3504/*************************************************
3505* Read retry information *
3506*************************************************/
3507
3508/* Each line of retry information contains:
3509
3510. A domain name pattern or an address pattern;
3511
3512. An error name, possibly with additional data, or *;
3513
3514. An optional sequence of retry items, each consisting of an identifying
3515 letter, a cutoff time, and optional parameters.
3516
3517All this is decoded and placed into a control block. */
3518
3519
3520/* Subroutine to read an argument, preceded by a comma and terminated
3521by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
35221 = fixed point number (returned *1000).
3523
3524Arguments:
3525 paddr pointer to pointer to current character; updated
3526 type 0 => read a time; 1 => read a fixed point number
3527
3528Returns: time in seconds or fixed point number * 1000
3529*/
3530
3531static int
3532retry_arg(uschar **paddr, int type)
3533{
3534uschar *p = *paddr;
3535uschar *pp;
3536
3537if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3538
3539while (isspace(*p)) p++;
3540pp = p;
3541while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3542
3543if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3544 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3545
3546*paddr = p;
3547switch (type)
3548 {
3549 case 0:
3550 return readconf_readtime(pp, *p, FALSE);
3551 case 1:
3552 return readconf_readfixed(pp, *p);
3553 }
3554return 0; /* Keep picky compilers happy */
3555}
3556
3557/* The function proper */
3558
3559void
3560readconf_retries(void)
3561{
3562retry_config **chain = &retries;
3563retry_config *next;
3564uschar *p;
3565
3566while ((p = get_config_line()) != NULL)
3567 {
3568 retry_rule **rchain;
3569 uschar *pp, *error;
3570
3571 next = store_get(sizeof(retry_config));
3572 next->next = NULL;
3573 *chain = next;
3574 chain = &(next->next);
3575 next->basic_errno = next->more_errno = 0;
3576 next->senders = NULL;
3577 next->rules = NULL;
3578 rchain = &(next->rules);
3579
3580 next->pattern = string_dequote(&p);
3581 while (isspace(*p)) p++;
3582 pp = p;
3583 while (mac_isgraph(*p)) p++;
3584 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3585 "missing error type");
3586
3587 /* Test error names for things we understand. */
3588
3589 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3590 &(next->more_errno))) != NULL)
3591 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3592
3593 /* There may be an optional address list of senders to be used as another
3594 constraint on the rule. This was added later, so the syntax is a bit of a
3595 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3596 an address list. */
3597
3598 while (isspace(*p)) p++;
3599 if (Ustrncmp(p, "senders", 7) == 0)
3600 {
3601 p += 7;
3602 while (isspace(*p)) p++;
3603 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3604 "\"=\" expected after \"senders\" in retry rule");
3605 while (isspace(*p)) p++;
3606 next->senders = string_dequote(&p);
3607 }
3608
3609 /* Now the retry rules. Keep the maximum timeout encountered. */
3610
3611 while (isspace(*p)) p++;
3612
3613 while (*p != 0)
3614 {
3615 retry_rule *rule = store_get(sizeof(retry_rule));
3616 *rchain = rule;
3617 rchain = &(rule->next);
3618 rule->next = NULL;
3619 rule->rule = toupper(*p++);
3620 rule->timeout = retry_arg(&p, 0);
3621 if (rule->timeout > retry_maximum_timeout)
3622 retry_maximum_timeout = rule->timeout;
3623
3624 switch (rule->rule)
3625 {
3626 case 'F': /* Fixed interval */
3627 rule->p1 = retry_arg(&p, 0);
3628 break;
3629
3630 case 'G': /* Geometrically increasing intervals */
6af56900 3631 case 'H': /* Ditto, but with randomness */
059ec3d9
PH
3632 rule->p1 = retry_arg(&p, 0);
3633 rule->p2 = retry_arg(&p, 1);
3634 break;
3635
3636 default:
3637 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3638 break;
3639 }
3640
3641 if (rule->timeout <= 0 || rule->p1 <= 0 ||
6af56900 3642 (rule->rule != 'F' && rule->p2 < 1000))
059ec3d9
PH
3643 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3644 "bad parameters for retry rule");
3645
3646 while (isspace(*p)) p++;
3647 if (*p == ';')
3648 {
3649 p++;
3650 while (isspace(*p)) p++;
3651 }
3652 else if (*p != 0)
3653 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3654 }
3655 }
3656}
3657
3658
3659
3660/*************************************************
3661* Initialize authenticators *
3662*************************************************/
3663
3664/* Read the authenticators section of the configuration file.
3665
3666Arguments: none
3667Returns: nothing
3668*/
3669
3670static void
3671auths_init(void)
3672{
3673auth_instance *au, *bu;
3674readconf_driver_init(US"authenticator",
3675 (driver_instance **)(&auths), /* chain anchor */
3676 (driver_info *)auths_available, /* available drivers */
3677 sizeof(auth_info), /* size of info block */
3678 &auth_defaults, /* default values for generic options */
3679 sizeof(auth_instance), /* size of instance block */
3680 optionlist_auths, /* generic options */
3681 optionlist_auths_size);
3682
3683for (au = auths; au != NULL; au = au->next)
3684 {
3685 if (au->public_name == NULL)
3686 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3687 "the %s authenticator", au->name);
3688 for (bu = au->next; bu != NULL; bu = bu->next)
3689 {
3690 if (strcmpic(au->public_name, bu->public_name) == 0)
3691 {
3692 if ((au->client && bu->client) || (au->server && bu->server))
3693 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3694 "(%s and %s) have the same public name (%s)",
3695 (au->client)? US"client" : US"server", au->name, bu->name,
3696 au->public_name);
3697 }
3698 }
3699 }
3700}
3701
3702
3703
3704
3705/*************************************************
3706* Read ACL information *
3707*************************************************/
3708
3709/* If this run of Exim is not doing something that involves receiving a
3710message, we can just skip over the ACL information. No need to parse it.
3711
3712First, we have a function for acl_read() to call back to get the next line. We
3713need to remember the line we passed, because at the end it will contain the
3714name of the next ACL. */
3715
3716static uschar *acl_line;
3717
3718static uschar *
3719acl_callback(void)
3720{
3721acl_line = get_config_line();
3722return acl_line;
3723}
3724
3725
3726/* Now the main function:
3727
3728Arguments:
3729 skip TRUE when this Exim process is doing something that will
3730 not need the ACL data
3731
3732Returns: nothing
3733*/
3734
3735static void
3736readconf_acl(BOOL skip)
3737{
3738uschar *p;
3739
3740/* Not receiving messages, don't need to parse the ACL data */
3741
3742if (skip)
3743 {
3744 DEBUG(D_acl) debug_printf("skipping ACL configuration - not needed\n");
3745 while ((p = get_config_line()) != NULL);
3746 return;
3747 }
3748
cf00dad6
PH
3749/* Read each ACL and add it into the tree. Macro (re)definitions are allowed
3750between ACLs. */
059ec3d9
PH
3751
3752acl_line = get_config_line();
3753
3754while(acl_line != NULL)
3755 {
3756 uschar name[64];
3757 tree_node *node;
3758 uschar *error;
3759
3760 p = readconf_readname(name, sizeof(name), acl_line);
cf00dad6
PH
3761 if (isupper(*name) && *p == '=')
3762 {
3763 read_macro_assignment(acl_line);
3764 acl_line = get_config_line();
3765 continue;
3766 }
3767
3768 if (*p != ':' || name[0] == 0)
3769 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
059ec3d9
PH
3770
3771 node = store_get(sizeof(tree_node) + Ustrlen(name));
3772 Ustrcpy(node->name, name);
3773 if (!tree_insertnode(&acl_anchor, node))
3774 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3775 "there are two ACLs called \"%s\"", name);
3776
3777 node->data.ptr = acl_read(acl_callback, &error);
3778
3779 if (node->data.ptr == NULL && error != NULL)
3780 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
3781 }
3782}
3783
3784
3785
3786/*************************************************
3787* Read configuration for local_scan() *
3788*************************************************/
3789
3790/* This function is called after "begin local_scan" is encountered in the
3791configuration file. If the local_scan() function allows for configuration
3792options, we can process them. Otherwise, we expire in a panic.
3793
3794Arguments: none
3795Returns: nothing
3796*/
3797
3798static void
3799local_scan_init(void)
3800{
3801#ifndef LOCAL_SCAN_HAS_OPTIONS
3802log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
3803 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
3804#else
3805
3806uschar *p;
3807while ((p = get_config_line()) != NULL)
3808 {
3809 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
3810 NULL, US"local_scan option \"%s\" unknown");
3811 }
3812#endif
3813}
3814
3815
3816
3817/*************************************************
3818* Read rest of configuration (after main) *
3819*************************************************/
3820
3821/* This function reads the rest of the runtime configuration, after the main
3822configuration. It is called only when actually needed. Each subsequent section
3823of the configuration starts with a line of the form
3824
3825 begin name
3826
3827where the name is "routers", "transports", etc. A section is terminated by
3828hitting the next "begin" line, and the next name is left in next_section.
3829Because it may confuse people as to whether the names are singular or plural,
3830we add "s" if it's missing. There is always enough room in next_section for
3831this. This function is basically just a switch.
3832
3833Arguments:
3834 skip_acl TRUE if ACL information is not needed
3835
3836Returns: nothing
3837*/
3838
3839static uschar *section_list[] = {
3840 US"acls",
3841 US"authenticators",
3842 US"local_scans",
3843 US"retrys",
3844 US"rewrites",
3845 US"routers",
3846 US"transports"};
3847
3848void
3849readconf_rest(BOOL skip_acl)
3850{
3851int had = 0;
3852
3853while(next_section[0] != 0)
3854 {
3855 int bit;
3856 int first = 0;
3857 int last = sizeof(section_list) / sizeof(uschar *);
3858 int mid = last/2;
3859 int n = Ustrlen(next_section);
3860
3861 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
3862
3863 for (;;)
3864 {
3865 int c = strcmpic(next_section, section_list[mid]);
3866 if (c == 0) break;
3867 if (c > 0) first = mid + 1; else last = mid;
3868 if (first >= last)
3869 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3870 "\"%.*s\" is not a known configuration section name", n, next_section);
3871 mid = (last + first)/2;
3872 }
3873
3874 bit = 1 << mid;
3875 if (((had ^= bit) & bit) == 0)
3876 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3877 "\"%.*s\" section is repeated in the configuration file", n,
3878 next_section);
3879
3880 switch(mid)
3881 {
3882 case 0: readconf_acl(skip_acl); break;
3883 case 1: auths_init(); break;
3884 case 2: local_scan_init(); break;
3885 case 3: readconf_retries(); break;
3886 case 4: readconf_rewrites(); break;
3887 case 5: route_init(); break;
3888 case 6: transport_init(); break;
3889 }
3890 }
3891
f1e894f3 3892(void)fclose(config_file);
059ec3d9
PH
3893}
3894
3895/* End of readconf.c */