tidying
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 extern char **environ;
15
16 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 static void save_config_line(const uschar* line);
18 static void save_config_position(const uschar *file, int line);
19 static void print_config(BOOL admin, BOOL terse);
20 static void readconf_options_auths(void);
21
22
23 #define CSTATE_STACK_SIZE 10
24
25
26 /* Structure for chain (stack) of .included files */
27
28 typedef struct config_file_item {
29 struct config_file_item *next;
30 uschar *filename;
31 FILE *file;
32 int lineno;
33 } config_file_item;
34
35 /* Structure for chain of configuration lines (-bP config) */
36
37 typedef struct config_line_item {
38 struct config_line_item *next;
39 uschar *line;
40 } config_line_item;
41
42 static config_line_item* config_lines;
43
44 /* Structure of table of conditional words and their state transitions */
45
46 typedef struct cond_item {
47 uschar *name;
48 int namelen;
49 int action1;
50 int action2;
51 int pushpop;
52 } cond_item;
53
54 /* Structure of table of syslog facility names and values */
55
56 typedef struct syslog_fac_item {
57 uschar *name;
58 int value;
59 } syslog_fac_item;
60
61 /* constants */
62 static const char * const hidden = "<value not displayable>";
63
64 /* Static variables */
65
66 static config_file_item *config_file_stack = NULL; /* For includes */
67
68 static uschar *syslog_facility_str = NULL;
69 static uschar next_section[24];
70 static uschar time_buffer[24];
71
72 /* State variables for conditional loading (.ifdef / .else / .endif) */
73
74 static int cstate = 0;
75 static int cstate_stack_ptr = -1;
76 static int cstate_stack[CSTATE_STACK_SIZE];
77
78 /* Table of state transitions for handling conditional inclusions. There are
79 four possible state transitions:
80
81 .ifdef true
82 .ifdef false
83 .elifdef true (or .else)
84 .elifdef false
85
86 .endif just causes the previous cstate to be popped off the stack */
87
88 static int next_cstate[3][4] =
89 {
90 /* State 0: reading from file, or reading until next .else or .endif */
91 { 0, 1, 2, 2 },
92 /* State 1: condition failed, skipping until next .else or .endif */
93 { 2, 2, 0, 1 },
94 /* State 2: skipping until .endif */
95 { 2, 2, 2, 2 },
96 };
97
98 /* Table of conditionals and the states to set. For each name, there are four
99 values: the length of the name (to save computing it each time), the state to
100 set if a macro was found in the line, the state to set if a macro was not found
101 in the line, and a stack manipulation setting which is:
102
103 -1 pull state value off the stack
104 0 don't alter the stack
105 +1 push value onto stack, before setting new state
106 */
107
108 static cond_item cond_list[] = {
109 { US"ifdef", 5, 0, 1, 1 },
110 { US"ifndef", 6, 1, 0, 1 },
111 { US"elifdef", 7, 2, 3, 0 },
112 { US"elifndef", 8, 3, 2, 0 },
113 { US"else", 4, 2, 2, 0 },
114 { US"endif", 5, 0, 0, -1 }
115 };
116
117 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
118
119 /* Table of syslog facility names and their values */
120
121 static syslog_fac_item syslog_list[] = {
122 { US"mail", LOG_MAIL },
123 { US"user", LOG_USER },
124 { US"news", LOG_NEWS },
125 { US"uucp", LOG_UUCP },
126 { US"local0", LOG_LOCAL0 },
127 { US"local1", LOG_LOCAL1 },
128 { US"local2", LOG_LOCAL2 },
129 { US"local3", LOG_LOCAL3 },
130 { US"local4", LOG_LOCAL4 },
131 { US"local5", LOG_LOCAL5 },
132 { US"local6", LOG_LOCAL6 },
133 { US"local7", LOG_LOCAL7 },
134 { US"daemon", LOG_DAEMON }
135 };
136
137 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
138
139
140
141
142 /*************************************************
143 * Main configuration options *
144 *************************************************/
145
146 /* The list of options that can be set in the main configuration file. This
147 must be in alphabetic order because it is searched by binary chop. */
148
149 static optionlist optionlist_config[] = {
150 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
151 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
152 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
153 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
154 { "accept_8bitmime", opt_bool, &accept_8bitmime },
155 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
156 #ifdef WITH_CONTENT_SCAN
157 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
158 #endif
159 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
160 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
161 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
162 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
163 #ifndef DISABLE_PRDR
164 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
165 #endif
166 #ifndef DISABLE_DKIM
167 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
168 #endif
169 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
170 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
171 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
172 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
173 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
174 #ifdef WITH_CONTENT_SCAN
175 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
176 #endif
177 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
178 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
179 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
180 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
181 #ifdef SUPPORT_TLS
182 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
183 #endif
184 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
185 { "add_environment", opt_stringptr, &add_environment },
186 { "admin_groups", opt_gidlist, &admin_groups },
187 { "allow_domain_literals", opt_bool, &allow_domain_literals },
188 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
189 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
190 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
191 { "auto_thaw", opt_time, &auto_thaw },
192 #ifdef WITH_CONTENT_SCAN
193 { "av_scanner", opt_stringptr, &av_scanner },
194 #endif
195 { "bi_command", opt_stringptr, &bi_command },
196 #ifdef EXPERIMENTAL_BRIGHTMAIL
197 { "bmi_config_file", opt_stringptr, &bmi_config_file },
198 #endif
199 { "bounce_message_file", opt_stringptr, &bounce_message_file },
200 { "bounce_message_text", opt_stringptr, &bounce_message_text },
201 { "bounce_return_body", opt_bool, &bounce_return_body },
202 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
203 { "bounce_return_message", opt_bool, &bounce_return_message },
204 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
205 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
206 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
207 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
208 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
209 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
210 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
211 { "check_log_inodes", opt_int, &check_log_inodes },
212 { "check_log_space", opt_Kint, &check_log_space },
213 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
214 { "check_spool_inodes", opt_int, &check_spool_inodes },
215 { "check_spool_space", opt_Kint, &check_spool_space },
216 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
217 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
218 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
219 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
220 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
221 #ifdef EXPERIMENTAL_DCC
222 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
223 { "dccifd_address", opt_stringptr, &dccifd_address },
224 { "dccifd_options", opt_stringptr, &dccifd_options },
225 #endif
226 { "delay_warning", opt_timelist, &delay_warning },
227 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
228 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
229 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
230 { "delivery_date_remove", opt_bool, &delivery_date_remove },
231 #ifdef ENABLE_DISABLE_FSYNC
232 { "disable_fsync", opt_bool, &disable_fsync },
233 #endif
234 { "disable_ipv6", opt_bool, &disable_ipv6 },
235 #ifndef DISABLE_DKIM
236 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
237 #endif
238 #ifdef EXPERIMENTAL_DMARC
239 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
240 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
241 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
242 #endif
243 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
244 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
245 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
246 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
247 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
248 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
249 { "dns_retrans", opt_time, &dns_retrans },
250 { "dns_retry", opt_int, &dns_retry },
251 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
252 { "dns_use_edns0", opt_int, &dns_use_edns0 },
253 /* This option is now a no-op, retained for compability */
254 { "drop_cr", opt_bool, &drop_cr },
255 /*********************************************************/
256 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
257 { "dsn_from", opt_stringptr, &dsn_from },
258 { "envelope_to_remove", opt_bool, &envelope_to_remove },
259 { "errors_copy", opt_stringptr, &errors_copy },
260 { "errors_reply_to", opt_stringptr, &errors_reply_to },
261 #ifndef DISABLE_EVENT
262 { "event_action", opt_stringptr, &event_action },
263 #endif
264 { "exim_group", opt_gid, &exim_gid },
265 { "exim_path", opt_stringptr, &exim_path },
266 { "exim_user", opt_uid, &exim_uid },
267 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
268 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
269 { "finduser_retries", opt_int, &finduser_retries },
270 { "freeze_tell", opt_stringptr, &freeze_tell },
271 { "gecos_name", opt_stringptr, &gecos_name },
272 { "gecos_pattern", opt_stringptr, &gecos_pattern },
273 #ifdef SUPPORT_TLS
274 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
275 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
276 #endif
277 { "header_line_maxsize", opt_int, &header_line_maxsize },
278 { "header_maxsize", opt_int, &header_maxsize },
279 { "headers_charset", opt_stringptr, &headers_charset },
280 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
281 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
282 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
283 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
284 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
285 { "hold_domains", opt_stringptr, &hold_domains },
286 { "host_lookup", opt_stringptr, &host_lookup },
287 { "host_lookup_order", opt_stringptr, &host_lookup_order },
288 { "host_reject_connection", opt_stringptr, &host_reject_connection },
289 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
290 #ifdef SUPPORT_PROXY
291 { "hosts_proxy", opt_stringptr, &hosts_proxy },
292 #endif
293 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
294 #ifdef LOOKUP_IBASE
295 { "ibase_servers", opt_stringptr, &ibase_servers },
296 #endif
297 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
298 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
299 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
300 { "keep_environment", opt_stringptr, &keep_environment },
301 { "keep_malformed", opt_time, &keep_malformed },
302 #ifdef LOOKUP_LDAP
303 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
304 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
305 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
306 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
307 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
308 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
309 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
310 { "ldap_start_tls", opt_bool, &eldap_start_tls },
311 { "ldap_version", opt_int, &eldap_version },
312 #endif
313 { "local_from_check", opt_bool, &local_from_check },
314 { "local_from_prefix", opt_stringptr, &local_from_prefix },
315 { "local_from_suffix", opt_stringptr, &local_from_suffix },
316 { "local_interfaces", opt_stringptr, &local_interfaces },
317 { "local_scan_timeout", opt_time, &local_scan_timeout },
318 { "local_sender_retain", opt_bool, &local_sender_retain },
319 { "localhost_number", opt_stringptr, &host_number_string },
320 { "log_file_path", opt_stringptr, &log_file_path },
321 { "log_selector", opt_stringptr, &log_selector_string },
322 { "log_timezone", opt_bool, &log_timezone },
323 { "lookup_open_max", opt_int, &lookup_open_max },
324 { "max_username_length", opt_int, &max_username_length },
325 { "message_body_newlines", opt_bool, &message_body_newlines },
326 { "message_body_visible", opt_mkint, &message_body_visible },
327 { "message_id_header_domain", opt_stringptr, &message_id_domain },
328 { "message_id_header_text", opt_stringptr, &message_id_text },
329 { "message_logs", opt_bool, &message_logs },
330 { "message_size_limit", opt_stringptr, &message_size_limit },
331 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
332 { "move_frozen_messages", opt_bool, &move_frozen_messages },
333 #endif
334 { "mua_wrapper", opt_bool, &mua_wrapper },
335 #ifdef LOOKUP_MYSQL
336 { "mysql_servers", opt_stringptr, &mysql_servers },
337 #endif
338 { "never_users", opt_uidlist, &never_users },
339 #ifdef SUPPORT_TLS
340 { "openssl_options", opt_stringptr, &openssl_options },
341 #endif
342 #ifdef LOOKUP_ORACLE
343 { "oracle_servers", opt_stringptr, &oracle_servers },
344 #endif
345 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
346 #ifdef EXIM_PERL
347 { "perl_at_start", opt_bool, &opt_perl_at_start },
348 { "perl_startup", opt_stringptr, &opt_perl_startup },
349 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
350 #endif
351 #ifdef LOOKUP_PGSQL
352 { "pgsql_servers", opt_stringptr, &pgsql_servers },
353 #endif
354 { "pid_file_path", opt_stringptr, &pid_file_path },
355 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
356 #ifndef DISABLE_PRDR
357 { "prdr_enable", opt_bool, &prdr_enable },
358 #endif
359 { "preserve_message_logs", opt_bool, &preserve_message_logs },
360 { "primary_hostname", opt_stringptr, &primary_hostname },
361 { "print_topbitchars", opt_bool, &print_topbitchars },
362 { "process_log_path", opt_stringptr, &process_log_path },
363 { "prod_requires_admin", opt_bool, &prod_requires_admin },
364 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
365 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
366 { "queue_domains", opt_stringptr, &queue_domains },
367 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
368 { "queue_only", opt_bool, &queue_only },
369 { "queue_only_file", opt_stringptr, &queue_only_file },
370 { "queue_only_load", opt_fixed, &queue_only_load },
371 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
372 { "queue_only_override", opt_bool, &queue_only_override },
373 { "queue_run_in_order", opt_bool, &queue_run_in_order },
374 { "queue_run_max", opt_stringptr, &queue_run_max },
375 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
376 { "receive_timeout", opt_time, &receive_timeout },
377 { "received_header_text", opt_stringptr, &received_header_text },
378 { "received_headers_max", opt_int, &received_headers_max },
379 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
380 { "recipients_max", opt_int, &recipients_max },
381 { "recipients_max_reject", opt_bool, &recipients_max_reject },
382 #ifdef LOOKUP_REDIS
383 { "redis_servers", opt_stringptr, &redis_servers },
384 #endif
385 { "remote_max_parallel", opt_int, &remote_max_parallel },
386 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
387 { "retry_data_expire", opt_time, &retry_data_expire },
388 { "retry_interval_max", opt_time, &retry_interval_max },
389 { "return_path_remove", opt_bool, &return_path_remove },
390 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
391 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
392 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
393 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
394 { "slow_lookup_log", opt_int, &slow_lookup_log },
395 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
396 { "smtp_accept_max", opt_int, &smtp_accept_max },
397 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
398 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
399 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
400 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
401 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
402 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
403 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
404 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
405 { "smtp_banner", opt_stringptr, &smtp_banner },
406 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
407 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
408 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
409 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
410 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
411 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
412 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
413 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
414 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
415 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
416 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
417 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
418 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
419 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
420 #ifdef SUPPORT_I18N
421 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
422 #endif
423 #ifdef WITH_CONTENT_SCAN
424 { "spamd_address", opt_stringptr, &spamd_address },
425 #endif
426 #ifdef EXPERIMENTAL_SPF
427 { "spf_guess", opt_stringptr, &spf_guess },
428 #endif
429 { "split_spool_directory", opt_bool, &split_spool_directory },
430 { "spool_directory", opt_stringptr, &spool_directory },
431 #ifdef LOOKUP_SQLITE
432 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
433 #endif
434 #ifdef EXPERIMENTAL_SRS
435 { "srs_config", opt_stringptr, &srs_config },
436 { "srs_hashlength", opt_int, &srs_hashlength },
437 { "srs_hashmin", opt_int, &srs_hashmin },
438 { "srs_maxage", opt_int, &srs_maxage },
439 { "srs_secrets", opt_stringptr, &srs_secrets },
440 { "srs_usehash", opt_bool, &srs_usehash },
441 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
442 #endif
443 { "strict_acl_vars", opt_bool, &strict_acl_vars },
444 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
445 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
446 { "syslog_duplication", opt_bool, &syslog_duplication },
447 { "syslog_facility", opt_stringptr, &syslog_facility_str },
448 { "syslog_processname", opt_stringptr, &syslog_processname },
449 { "syslog_timestamp", opt_bool, &syslog_timestamp },
450 { "system_filter", opt_stringptr, &system_filter },
451 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
452 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
453 { "system_filter_group", opt_gid, &system_filter_gid },
454 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
455 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
456 { "system_filter_user", opt_uid, &system_filter_uid },
457 { "tcp_nodelay", opt_bool, &tcp_nodelay },
458 #ifdef USE_TCP_WRAPPERS
459 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
460 #endif
461 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
462 { "timezone", opt_stringptr, &timezone_string },
463 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
464 #ifdef SUPPORT_TLS
465 { "tls_certificate", opt_stringptr, &tls_certificate },
466 { "tls_crl", opt_stringptr, &tls_crl },
467 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
468 { "tls_dhparam", opt_stringptr, &tls_dhparam },
469 { "tls_eccurve", opt_stringptr, &tls_eccurve },
470 # ifndef DISABLE_OCSP
471 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
472 # endif
473 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
474 { "tls_privatekey", opt_stringptr, &tls_privatekey },
475 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
476 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
477 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
478 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
479 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
480 #endif
481 { "trusted_groups", opt_gidlist, &trusted_groups },
482 { "trusted_users", opt_uidlist, &trusted_users },
483 { "unknown_login", opt_stringptr, &unknown_login },
484 { "unknown_username", opt_stringptr, &unknown_username },
485 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
486 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
487 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
488 { "warn_message_file", opt_stringptr, &warn_message_file },
489 { "write_rejectlog", opt_bool, &write_rejectlog }
490 };
491
492 static int optionlist_config_size = nelem(optionlist_config);
493
494
495
496 /*************************************************
497 * Find the name of an option *
498 *************************************************/
499
500 /* This function is to aid debugging. Various functions take arguments that are
501 pointer variables in the options table or in option tables for various drivers.
502 For debugging output, it is useful to be able to find the name of the option
503 which is currently being processed. This function finds it, if it exists, by
504 searching the table(s).
505
506 Arguments: a value that is presumed to be in the table above
507 Returns: the option name, or an empty string
508 */
509
510 uschar *
511 readconf_find_option(void *p)
512 {
513 int i;
514 router_instance *r;
515 transport_instance *t;
516
517 for (i = 0; i < nelem(optionlist_config); i++)
518 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
519
520 for (r = routers; r; r = r->next)
521 {
522 router_info *ri = r->info;
523 for (i = 0; i < *ri->options_count; i++)
524 {
525 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
526 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
527 return US ri->options[i].name;
528 }
529 }
530
531 for (t = transports; t; t = t->next)
532 {
533 transport_info *ti = t->info;
534 for (i = 0; i < *ti->options_count; i++)
535 {
536 optionlist * op = &ti->options[i];
537 if ((op->type & opt_mask) != opt_stringptr) continue;
538 if (p == ( op->type & opt_public
539 ? (char *)t
540 : (char *)t->options_block
541 )
542 + (long int)op->value)
543 return US op->name;
544 }
545 }
546
547 return US"";
548 }
549
550
551
552
553 /*************************************************
554 * Deal with an assignment to a macro *
555 *************************************************/
556
557 /* We have a new definition. The macro_item structure includes a final vector
558 called "name" which is one byte long. Thus, adding "namelen" gives us enough
559 room to store the "name" string.
560 If a builtin macro we place at head of list, else tail. This lets us lazy-create
561 builtins. */
562
563 macro_item *
564 macro_create(const uschar * name, const uschar * val,
565 BOOL command_line, BOOL builtin)
566 {
567 unsigned namelen = Ustrlen(name);
568 macro_item * m = store_get(sizeof(macro_item) + namelen);
569
570 if (!macros)
571 {
572 macros = m;
573 mlast = m;
574 m->next = NULL;
575 }
576 else if (builtin)
577 {
578 m->next = macros;
579 macros = m;
580 }
581 else
582 {
583 mlast->next = m;
584 mlast = m;
585 m->next = NULL;
586 }
587 m->command_line = command_line;
588 m->namelen = namelen;
589 m->replacement = string_copy(val);
590 Ustrcpy(m->name, name);
591 return m;
592 }
593
594
595 /* This function is called when a line that starts with an upper case letter is
596 encountered. The argument "line" should contain a complete logical line, and
597 start with the first letter of the macro name. The macro name and the
598 replacement text are extracted and stored. Redefinition of existing,
599 non-command line, macros is permitted using '==' instead of '='.
600
601 Arguments:
602 s points to the start of the logical line
603
604 Returns: nothing
605 */
606
607 static void
608 read_macro_assignment(uschar *s)
609 {
610 uschar name[64];
611 int namelen = 0;
612 BOOL redef = FALSE;
613 macro_item *m;
614
615 while (isalnum(*s) || *s == '_')
616 {
617 if (namelen >= sizeof(name) - 1)
618 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
619 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
620 name[namelen++] = *s++;
621 }
622 name[namelen] = 0;
623
624 while (isspace(*s)) s++;
625 if (*s++ != '=')
626 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
627
628 if (*s == '=')
629 {
630 redef = TRUE;
631 s++;
632 }
633 while (isspace(*s)) s++;
634
635 /* If an existing macro of the same name was defined on the command line, we
636 just skip this definition. It's an error to attempt to redefine a macro without
637 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
638 It is also an error to define a macro whose name begins with the name of a
639 previously defined macro. This is the requirement that make using a tree
640 for macros hard; we must check all macros for the substring. Perhaps a
641 sorted list, and a bsearch, would work?
642 Note: it is documented that the other way round works. */
643
644 for (m = macros; m; m = m->next)
645 {
646 if (Ustrcmp(m->name, name) == 0)
647 {
648 if (!m->command_line && !redef)
649 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
650 "defined (use \"==\" if you want to redefine it", name);
651 break;
652 }
653
654 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
655 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
656 "a macro because previously defined macro \"%s\" is a substring",
657 name, m->name);
658
659 /* We cannot have this test, because it is documented that a substring
660 macro is permitted (there is even an example).
661 *
662 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
663 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
664 * "a macro because it is a substring of previously defined macro \"%s\"",
665 * name, m->name);
666 */
667 }
668
669 /* Check for an overriding command-line definition. */
670
671 if (m && m->command_line) return;
672
673 /* Redefinition must refer to an existing macro. */
674
675 if (redef)
676 if (m)
677 m->replacement = string_copy(s);
678 else
679 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
680 "\"%s\"", name);
681
682 /* We have a new definition. */
683 else
684 (void) macro_create(name, s, FALSE, FALSE);
685 }
686
687
688
689
690
691 /*************************************************/
692 /* Create compile-time feature macros */
693 static void
694 readconf_features(void)
695 {
696 /* Probably we could work out a static initialiser for wherever
697 macros are stored, but this will do for now. Some names are awkward
698 due to conflicts with other common macros. */
699
700 #ifdef SUPPORT_CRYPTEQ
701 macro_create(US"_HAVE_CRYPTEQ", US"y", FALSE, TRUE);
702 #endif
703 #if HAVE_ICONV
704 macro_create(US"_HAVE_ICONV", US"y", FALSE, TRUE);
705 #endif
706 #if HAVE_IPV6
707 macro_create(US"_HAVE_IPV6", US"y", FALSE, TRUE);
708 #endif
709 #ifdef HAVE_SETCLASSRESOURCES
710 macro_create(US"_HAVE_SETCLASSRESOURCES", US"y", FALSE, TRUE);
711 #endif
712 #ifdef SUPPORT_PAM
713 macro_create(US"_HAVE_PAM", US"y", FALSE, TRUE);
714 #endif
715 #ifdef EXIM_PERL
716 macro_create(US"_HAVE_PERL", US"y", FALSE, TRUE);
717 #endif
718 #ifdef EXPAND_DLFUNC
719 macro_create(US"_HAVE_DLFUNC", US"y", FALSE, TRUE);
720 #endif
721 #ifdef USE_TCP_WRAPPERS
722 macro_create(US"_HAVE_TCPWRAPPERS", US"y", FALSE, TRUE);
723 #endif
724 #ifdef SUPPORT_TLS
725 macro_create(US"_HAVE_TLS", US"y", FALSE, TRUE);
726 # ifdef USE_GNUTLS
727 macro_create(US"_HAVE_GNUTLS", US"y", FALSE, TRUE);
728 # else
729 macro_create(US"_HAVE_OPENSSL", US"y", FALSE, TRUE);
730 # endif
731 #endif
732 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
733 macro_create(US"_HAVE_TRANSLATE_IP_ADDRESS", US"y", FALSE, TRUE);
734 #endif
735 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
736 macro_create(US"_HAVE_MOVE_FROZEN_MESSAGES", US"y", FALSE, TRUE);
737 #endif
738 #ifdef WITH_CONTENT_SCAN
739 macro_create(US"_HAVE_CONTENT_SCANNING", US"y", FALSE, TRUE);
740 #endif
741 #ifndef DISABLE_DKIM
742 macro_create(US"_HAVE_DKIM", US"y", FALSE, TRUE);
743 #endif
744 #ifndef DISABLE_DNSSEC
745 macro_create(US"_HAVE_DNSSEC", US"y", FALSE, TRUE);
746 #endif
747 #ifndef DISABLE_EVENT
748 macro_create(US"_HAVE_EVENT", US"y", FALSE, TRUE);
749 #endif
750 #ifdef SUPPORT_I18N
751 macro_create(US"_HAVE_I18N", US"y", FALSE, TRUE);
752 #endif
753 #ifndef DISABLE_OCSP
754 macro_create(US"_HAVE_OCSP", US"y", FALSE, TRUE);
755 #endif
756 #ifndef DISABLE_PRDR
757 macro_create(US"_HAVE_PRDR", US"y", FALSE, TRUE);
758 #endif
759 #ifdef SUPPORT_PROXY
760 macro_create(US"_HAVE_PROXY", US"y", FALSE, TRUE);
761 #endif
762 #ifdef SUPPORT_SOCKS
763 macro_create(US"_HAVE_SOCKS", US"y", FALSE, TRUE);
764 #endif
765 #ifdef EXPERIMENTAL_LMDB
766 macro_create(US"_HAVE_LMDB", US"y", FALSE, TRUE);
767 #endif
768 #ifdef EXPERIMENTAL_SPF
769 macro_create(US"_HAVE_SPF", US"y", FALSE, TRUE);
770 #endif
771 #ifdef EXPERIMENTAL_SRS
772 macro_create(US"_HAVE_SRS", US"y", FALSE, TRUE);
773 #endif
774 #ifdef EXPERIMENTAL_BRIGHTMAIL
775 macro_create(US"_HAVE_BRIGHTMAIL", US"y", FALSE, TRUE);
776 #endif
777 #ifdef EXPERIMENTAL_DANE
778 macro_create(US"_HAVE_DANE", US"y", FALSE, TRUE);
779 #endif
780 #ifdef EXPERIMENTAL_DCC
781 macro_create(US"_HAVE_DCC", US"y", FALSE, TRUE);
782 #endif
783 #ifdef EXPERIMENTAL_DMARC
784 macro_create(US"_HAVE_DMARC", US"y", FALSE, TRUE);
785 #endif
786 #ifdef EXPERIMENTAL_DSN_INFO
787 macro_create(US"_HAVE_DSN_INFO", US"y", FALSE, TRUE);
788 #endif
789
790 #ifdef LOOKUP_LSEARCH
791 macro_create(US"_HAVE_LKUP_LSEARCH", US"y", FALSE, TRUE);
792 #endif
793 #ifdef LOOKUP_CDB
794 macro_create(US"_HAVE_LKUP_CDB", US"y", FALSE, TRUE);
795 #endif
796 #ifdef LOOKUP_DBM
797 macro_create(US"_HAVE_LKUP_DBM", US"y", FALSE, TRUE);
798 #endif
799 #ifdef LOOKUP_DNSDB
800 macro_create(US"_HAVE_LKUP_DNSDB", US"y", FALSE, TRUE);
801 #endif
802 #ifdef LOOKUP_DSEARCH
803 macro_create(US"_HAVE_LKUP_DSEARCH", US"y", FALSE, TRUE);
804 #endif
805 #ifdef LOOKUP_IBASE
806 macro_create(US"_HAVE_LKUP_IBASE", US"y", FALSE, TRUE);
807 #endif
808 #ifdef LOOKUP_LDAP
809 macro_create(US"_HAVE_LKUP_LDAP", US"y", FALSE, TRUE);
810 #endif
811 #ifdef EXPERIMENTAL_LMDB
812 macro_create(US"_HAVE_LKUP_LMDB", US"y", FALSE, TRUE);
813 #endif
814 #ifdef LOOKUP_MYSQL
815 macro_create(US"_HAVE_LKUP_MYSQL", US"y", FALSE, TRUE);
816 #endif
817 #ifdef LOOKUP_NIS
818 macro_create(US"_HAVE_LKUP_NIS", US"y", FALSE, TRUE);
819 #endif
820 #ifdef LOOKUP_NISPLUS
821 macro_create(US"_HAVE_LKUP_NISPLUS", US"y", FALSE, TRUE);
822 #endif
823 #ifdef LOOKUP_ORACLE
824 macro_create(US"_HAVE_LKUP_ORACLE", US"y", FALSE, TRUE);
825 #endif
826 #ifdef LOOKUP_PASSWD
827 macro_create(US"_HAVE_LKUP_PASSWD", US"y", FALSE, TRUE);
828 #endif
829 #ifdef LOOKUP_PGSQL
830 macro_create(US"_HAVE_LKUP_PGSQL", US"y", FALSE, TRUE);
831 #endif
832 #ifdef LOOKUP_REDIS
833 macro_create(US"_HAVE_LKUP_REDIS", US"y", FALSE, TRUE);
834 #endif
835 #ifdef LOOKUP_SQLITE
836 macro_create(US"_HAVE_LKUP_SQLITE", US"y", FALSE, TRUE);
837 #endif
838 #ifdef LOOKUP_TESTDB
839 macro_create(US"_HAVE_LKUP_TESTDB", US"y", FALSE, TRUE);
840 #endif
841 #ifdef LOOKUP_WHOSON
842 macro_create(US"_HAVE_LKUP_WHOSON", US"y", FALSE, TRUE);
843 #endif
844
845 #ifdef TRANSPORT_APPENDFILE
846 # ifdef SUPPORT_MAILDIR
847 macro_create(US"_HAVE_TPT_APPEND_MAILDR", US"y", FALSE, TRUE);
848 # endif
849 # ifdef SUPPORT_MAILSTORE
850 macro_create(US"_HAVE_TPT_APPEND_MAILSTORE", US"y", FALSE, TRUE);
851 # endif
852 # ifdef SUPPORT_MBX
853 macro_create(US"_HAVE_TPT_APPEND_MBX", US"y", FALSE, TRUE);
854 # endif
855 #endif
856 }
857
858
859 void
860 readconf_options_from_list(optionlist * opts, unsigned nopt, uschar * group)
861 {
862 int i;
863 const uschar * s;
864
865 /* Walk the array backwards to get substring-conflict names */
866 for (i = nopt-1; i >= 0; i--) if (*(s = opts[i].name) && *s != '*')
867 macro_create(string_sprintf("_OPT_%T_%T", group, s), US"y", FALSE, TRUE);
868 }
869
870
871 static void
872 readconf_options(void)
873 {
874 readconf_options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN");
875 readconf_options_routers();
876 readconf_options_transports();
877 readconf_options_auths();
878 }
879
880 static void
881 macros_create_builtin(void)
882 {
883 readconf_features();
884 readconf_options();
885 macros_builtin_created = TRUE;
886 }
887
888
889 /*************************************************
890 * Read configuration line *
891 *************************************************/
892
893 /* A logical line of text is read from the configuration file into the big
894 buffer, taking account of macros, .includes, and continuations. The size of
895 big_buffer is increased if necessary. The count of configuration lines is
896 maintained. Physical input lines starting with # (ignoring leading white space,
897 and after macro replacement) and empty logical lines are always ignored.
898 Leading and trailing spaces are removed.
899
900 If we hit a line of the form "begin xxxx", the xxxx is placed in the
901 next_section vector, and the function returns NULL, indicating the end of a
902 configuration section. On end-of-file, NULL is returned with next_section
903 empty.
904
905 Arguments: none
906
907 Returns: a pointer to the first non-blank in the line,
908 or NULL if eof or end of section is reached
909 */
910
911 static uschar *
912 get_config_line(void)
913 {
914 int startoffset = 0; /* To first non-blank char in logical line */
915 int len = 0; /* Of logical line so far */
916 int newlen;
917 uschar *s, *ss;
918 macro_item *m;
919 BOOL macro_found;
920
921 /* Loop for handling continuation lines, skipping comments, and dealing with
922 .include files. */
923
924 for (;;)
925 {
926 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
927 {
928 if (config_file_stack != NULL) /* EOF inside .include */
929 {
930 (void)fclose(config_file);
931 config_file = config_file_stack->file;
932 config_filename = config_file_stack->filename;
933 config_lineno = config_file_stack->lineno;
934 config_file_stack = config_file_stack->next;
935 if (config_lines)
936 save_config_position(config_filename, config_lineno);
937 continue;
938 }
939
940 /* EOF at top level */
941
942 if (cstate_stack_ptr >= 0)
943 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
944 "Unexpected end of configuration file: .endif missing");
945
946 if (len != 0) break; /* EOF after continuation */
947 next_section[0] = 0; /* EOF at start of logical line */
948 return NULL;
949 }
950
951 config_lineno++;
952 newlen = len + Ustrlen(big_buffer + len);
953
954 if (config_lines && config_lineno == 1)
955 save_config_position(config_filename, config_lineno);
956
957 /* Handle pathologically long physical lines - yes, it did happen - by
958 extending big_buffer at this point. The code also copes with very long
959 logical lines. */
960
961 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
962 {
963 uschar *newbuffer;
964 big_buffer_size += BIG_BUFFER_SIZE;
965 newbuffer = store_malloc(big_buffer_size);
966
967 /* This use of strcpy is OK because we know that the string in the old
968 buffer is shorter than the new buffer. */
969
970 Ustrcpy(newbuffer, big_buffer);
971 store_free(big_buffer);
972 big_buffer = newbuffer;
973 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
974 break;
975 newlen += Ustrlen(big_buffer + newlen);
976 }
977
978 /* Find the true start of the physical line - leading spaces are always
979 ignored. */
980
981 ss = big_buffer + len;
982 while (isspace(*ss)) ss++;
983
984 /* Process the physical line for macros. If this is the start of the logical
985 line, skip over initial text at the start of the line if it starts with an
986 upper case character followed by a sequence of name characters and an equals
987 sign, because that is the definition of a new macro, and we don't do
988 replacement therein. */
989
990 s = ss;
991 if (len == 0 && isupper(*s))
992 {
993 while (isalnum(*s) || *s == '_') s++;
994 while (isspace(*s)) s++;
995 if (*s != '=') s = ss; /* Not a macro definition */
996 }
997
998 /* If the builtin macros are not yet defined, and the line contains an
999 underscrore followed by an one of the three possible chars used by
1000 builtins, create them. */
1001
1002 if (!macros_builtin_created)
1003 {
1004 const uschar * t, * p;
1005 uschar c;
1006 for (t = s; (p = CUstrchr(t, '_')); t = p+1)
1007 if (c = p[1], c == 'O' || c == 'D' || c == 'H')
1008 {
1009 macros_create_builtin();
1010 break;
1011 }
1012 }
1013
1014 /* For each defined macro, scan the line (from after XXX= if present),
1015 replacing all occurrences of the macro. */
1016
1017 macro_found = FALSE;
1018 for (m = macros; m; m = m->next)
1019 {
1020 uschar *p, *pp;
1021 uschar *t = s;
1022
1023 while ((p = Ustrstr(t, m->name)) != NULL)
1024 {
1025 int moveby;
1026 int replen = Ustrlen(m->replacement);
1027
1028 /* Expand the buffer if necessary */
1029
1030 while (newlen - m->namelen + replen + 1 > big_buffer_size)
1031 {
1032 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
1033 uschar *newbuffer = store_malloc(newsize);
1034 memcpy(newbuffer, big_buffer, newlen + 1);
1035 p = newbuffer + (p - big_buffer);
1036 s = newbuffer + (s - big_buffer);
1037 ss = newbuffer + (ss - big_buffer);
1038 t = newbuffer + (t - big_buffer);
1039 big_buffer_size = newsize;
1040 store_free(big_buffer);
1041 big_buffer = newbuffer;
1042 }
1043
1044 /* Shuffle the remaining characters up or down in the buffer before
1045 copying in the replacement text. Don't rescan the replacement for this
1046 same macro. */
1047
1048 pp = p + m->namelen;
1049 if ((moveby = replen - m->namelen) != 0)
1050 {
1051 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
1052 newlen += moveby;
1053 }
1054 Ustrncpy(p, m->replacement, replen);
1055 t = p + replen;
1056 macro_found = TRUE;
1057 }
1058 }
1059
1060 /* An empty macro replacement at the start of a line could mean that ss no
1061 longer points to the first non-blank character. */
1062
1063 while (isspace(*ss)) ss++;
1064
1065 /* Check for comment lines - these are physical lines. */
1066
1067 if (*ss == '#') continue;
1068
1069 /* Handle conditionals, which are also applied to physical lines. Conditions
1070 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1071 expansion occured on the rest of the line. A preliminary test for the leading
1072 '.' saves effort on most lines. */
1073
1074 if (*ss == '.')
1075 {
1076 int i;
1077
1078 /* Search the list of conditional directives */
1079
1080 for (i = 0; i < cond_list_size; i++)
1081 {
1082 int n;
1083 cond_item *c = cond_list+i;
1084 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1085
1086 /* The following character must be white space or end of string */
1087
1088 n = ss[1 + c->namelen];
1089 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1090
1091 /* .ifdef and .ifndef push the current state onto the stack, then set
1092 a new one from the table. Stack overflow is an error */
1093
1094 if (c->pushpop > 0)
1095 {
1096 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1097 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1098 ".%s nested too deeply", c->name);
1099 cstate_stack[++cstate_stack_ptr] = cstate;
1100 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1101 }
1102
1103 /* For any of the others, stack underflow is an error. The next state
1104 comes either from the stack (.endif) or from the table. */
1105
1106 else
1107 {
1108 if (cstate_stack_ptr < 0)
1109 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1110 ".%s without matching .ifdef", c->name);
1111 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1112 next_cstate[cstate][macro_found? c->action1 : c->action2];
1113 }
1114
1115 /* Having dealt with a directive, break the loop */
1116
1117 break;
1118 }
1119
1120 /* If we have handled a conditional directive, continue with the next
1121 physical line. Otherwise, fall through. */
1122
1123 if (i < cond_list_size) continue;
1124 }
1125
1126 /* If the conditional state is not 0 (actively using these lines), ignore
1127 this input line. */
1128
1129 if (cstate != 0) continue; /* Conditional skip */
1130
1131 /* Handle .include lines - these are also physical lines. */
1132
1133 if (Ustrncmp(ss, ".include", 8) == 0 &&
1134 (isspace(ss[8]) ||
1135 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1136 {
1137 uschar *t;
1138 int include_if_exists = isspace(ss[8])? 0 : 10;
1139 config_file_item *save;
1140 struct stat statbuf;
1141
1142 ss += 9 + include_if_exists;
1143 while (isspace(*ss)) ss++;
1144 t = ss + Ustrlen(ss);
1145 while (t > ss && isspace(t[-1])) t--;
1146 if (*ss == '\"' && t[-1] == '\"')
1147 {
1148 ss++;
1149 t--;
1150 }
1151 *t = 0;
1152
1153 if (*ss != '/')
1154 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1155 "absolute path \"%s\"", ss);
1156
1157 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1158
1159 if (config_lines)
1160 save_config_position(config_filename, config_lineno);
1161 save = store_get(sizeof(config_file_item));
1162 save->next = config_file_stack;
1163 config_file_stack = save;
1164 save->file = config_file;
1165 save->filename = config_filename;
1166 save->lineno = config_lineno;
1167
1168 if (!(config_file = Ufopen(ss, "rb")))
1169 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1170 "configuration file %s", ss);
1171
1172 config_filename = string_copy(ss);
1173 config_lineno = 0;
1174 continue;
1175 }
1176
1177 /* If this is the start of the logical line, remember where the non-blank
1178 data starts. Otherwise shuffle down continuation lines to remove leading
1179 white space. */
1180
1181 if (len == 0)
1182 startoffset = ss - big_buffer;
1183 else
1184 {
1185 s = big_buffer + len;
1186 if (ss > s)
1187 {
1188 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1189 newlen -= ss - s;
1190 }
1191 }
1192
1193 /* Accept the new addition to the line. Remove trailing white space. */
1194
1195 len = newlen;
1196 while (len > 0 && isspace(big_buffer[len-1])) len--;
1197 big_buffer[len] = 0;
1198
1199 /* We are done if the line does not end in backslash and contains some data.
1200 Empty logical lines are ignored. For continuations, remove the backslash and
1201 go round the loop to read the continuation line. */
1202
1203 if (len > 0)
1204 {
1205 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1206 big_buffer[--len] = 0; /* Remove backslash */
1207 }
1208 } /* Loop for reading multiple physical lines */
1209
1210 /* We now have a logical line. Test for the end of a configuration section (or,
1211 more accurately, for the start of the next section). Place the name of the next
1212 section in next_section, and return NULL. If the name given is longer than
1213 next_section, truncate it. It will be unrecognized later, because all the known
1214 section names do fit. Leave space for pluralizing. */
1215
1216 s = big_buffer + startoffset; /* First non-space character */
1217
1218 if (config_lines)
1219 save_config_line(s);
1220
1221 if (strncmpic(s, US"begin ", 6) == 0)
1222 {
1223 s += 6;
1224 while (isspace(*s)) s++;
1225 if (big_buffer + len - s > sizeof(next_section) - 2)
1226 s[sizeof(next_section) - 2] = 0;
1227 Ustrcpy(next_section, s);
1228 return NULL;
1229 }
1230
1231 /* Return the first non-blank character. */
1232
1233 return s;
1234 }
1235
1236
1237
1238 /*************************************************
1239 * Read a name *
1240 *************************************************/
1241
1242 /* The yield is the pointer to the next uschar. Names longer than the
1243 output space are silently truncated. This function is also used from acl.c when
1244 parsing ACLs.
1245
1246 Arguments:
1247 name where to put the name
1248 len length of name
1249 s input pointer
1250
1251 Returns: new input pointer
1252 */
1253
1254 uschar *
1255 readconf_readname(uschar *name, int len, uschar *s)
1256 {
1257 int p = 0;
1258 while (isspace(*s)) s++;
1259 if (isalpha(*s))
1260 {
1261 while (isalnum(*s) || *s == '_')
1262 {
1263 if (p < len-1) name[p++] = *s;
1264 s++;
1265 }
1266 }
1267 name[p] = 0;
1268 while (isspace(*s)) s++;
1269 return s;
1270 }
1271
1272
1273
1274
1275 /*************************************************
1276 * Read a time value *
1277 *************************************************/
1278
1279 /* This function is also called from outside, to read argument
1280 time values. The format of a time value is:
1281
1282 [<n>w][<n>d][<n>h][<n>m][<n>s]
1283
1284 as long as at least one is present. If a format error is encountered,
1285 return a negative value. The value must be terminated by the given
1286 terminator.
1287
1288 Arguments:
1289 s input pointer
1290 terminator required terminating character
1291 return_msec if TRUE, allow fractional seconds and return milliseconds
1292
1293 Returns: the time value, or -1 on syntax error
1294 value is seconds if return_msec is FALSE
1295 value is milliseconds if return_msec is TRUE
1296 */
1297
1298 int
1299 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1300 {
1301 int yield = 0;
1302 for (;;)
1303 {
1304 int value, count;
1305 double fraction;
1306
1307 if (!isdigit(*s)) return -1;
1308 (void)sscanf(CCS s, "%d%n", &value, &count);
1309 s += count;
1310
1311 switch (*s)
1312 {
1313 case 'w': value *= 7;
1314 case 'd': value *= 24;
1315 case 'h': value *= 60;
1316 case 'm': value *= 60;
1317 case 's': s++;
1318 break;
1319
1320 case '.':
1321 if (!return_msec) return -1;
1322 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1323 s += count;
1324 if (*s++ != 's') return -1;
1325 yield += (int)(fraction * 1000.0);
1326 break;
1327
1328 default: return -1;
1329 }
1330
1331 if (return_msec) value *= 1000;
1332 yield += value;
1333 if (*s == terminator) return yield;
1334 }
1335 /* Control never reaches here. */
1336 }
1337
1338
1339
1340 /*************************************************
1341 * Read a fixed point value *
1342 *************************************************/
1343
1344 /* The value is returned *1000
1345
1346 Arguments:
1347 s input pointer
1348 terminator required terminator
1349
1350 Returns: the value, or -1 on error
1351 */
1352
1353 static int
1354 readconf_readfixed(const uschar *s, int terminator)
1355 {
1356 int yield = 0;
1357 int value, count;
1358 if (!isdigit(*s)) return -1;
1359 (void)sscanf(CS s, "%d%n", &value, &count);
1360 s += count;
1361 yield = value * 1000;
1362 if (*s == '.')
1363 {
1364 int m = 100;
1365 while (isdigit((*(++s))))
1366 {
1367 yield += (*s - '0') * m;
1368 m /= 10;
1369 }
1370 }
1371
1372 return (*s == terminator)? yield : (-1);
1373 }
1374
1375
1376
1377 /*************************************************
1378 * Find option in list *
1379 *************************************************/
1380
1381 /* The lists are always in order, so binary chop can be used.
1382
1383 Arguments:
1384 name the option name to search for
1385 ol the first entry in the option list
1386 last one more than the offset of the last entry in the option list
1387
1388 Returns: pointer to an option entry, or NULL if not found
1389 */
1390
1391 static optionlist *
1392 find_option(uschar *name, optionlist *ol, int last)
1393 {
1394 int first = 0;
1395 while (last > first)
1396 {
1397 int middle = (first + last)/2;
1398 int c = Ustrcmp(name, ol[middle].name);
1399
1400 if (c == 0) return ol + middle;
1401 else if (c > 0) first = middle + 1;
1402 else last = middle;
1403 }
1404 return NULL;
1405 }
1406
1407
1408
1409 /*************************************************
1410 * Find a set flag in option list *
1411 *************************************************/
1412
1413 /* Because some versions of Unix make no restrictions on the values of uids and
1414 gids (even negative ones), we cannot represent "unset" by a special value.
1415 There is therefore a separate boolean variable for each one indicating whether
1416 a value is set or not. This function returns a pointer to the boolean, given
1417 the original option name. It is a major disaster if the flag cannot be found.
1418
1419 Arguments:
1420 name the name of the uid or gid option
1421 oltop points to the start of the relevant option list
1422 last one more than the offset of the last item in the option list
1423 data_block NULL when reading main options => data values in the option
1424 list are absolute addresses; otherwise they are byte offsets
1425 in data_block (used for driver options)
1426
1427 Returns: a pointer to the boolean flag.
1428 */
1429
1430 static BOOL *
1431 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1432 {
1433 optionlist *ol;
1434 uschar name2[64];
1435 sprintf(CS name2, "*set_%.50s", name);
1436 ol = find_option(name2, oltop, last);
1437 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1438 "Exim internal error: missing set flag for %s", name);
1439 return (data_block == NULL)? (BOOL *)(ol->value) :
1440 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1441 }
1442
1443
1444
1445
1446 /*************************************************
1447 * Output extra characters message and die *
1448 *************************************************/
1449
1450 /* Called when an option line has junk on the end. Sometimes this is because
1451 the sysadmin thinks comments are permitted.
1452
1453 Arguments:
1454 s points to the extra characters
1455 t1..t3 strings to insert in the log message
1456
1457 Returns: doesn't return; dies
1458 */
1459
1460 static void
1461 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1462 {
1463 uschar *comment = US"";
1464 if (*s == '#') comment = US" (# is comment only at line start)";
1465 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1466 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1467 }
1468
1469
1470
1471 /*************************************************
1472 * Read rewrite information *
1473 *************************************************/
1474
1475 /* Each line of rewrite information contains:
1476
1477 . A complete address in the form user@domain, possibly with
1478 leading * for each part; or alternatively, a regex.
1479
1480 . A replacement string (which will be expanded).
1481
1482 . An optional sequence of one-letter flags, indicating which
1483 headers etc. to apply this rule to.
1484
1485 All this is decoded and placed into a control block. The OR of the flags is
1486 maintained in a common word.
1487
1488 Arguments:
1489 p points to the string that makes up the rule
1490 existflags points to the overall flag word
1491 isglobal TRUE if reading global rewrite rules
1492
1493 Returns: the control block for the parsed rule.
1494 */
1495
1496 static rewrite_rule *
1497 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1498 {
1499 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1500
1501 next->next = NULL;
1502 next->key = string_dequote(&p);
1503
1504 while (isspace(*p)) p++;
1505 if (*p == 0)
1506 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1507 "missing rewrite replacement string");
1508
1509 next->flags = 0;
1510 next->replacement = string_dequote(&p);
1511
1512 while (*p != 0) switch (*p++)
1513 {
1514 case ' ': case '\t': break;
1515
1516 case 'q': next->flags |= rewrite_quit; break;
1517 case 'w': next->flags |= rewrite_whole; break;
1518
1519 case 'h': next->flags |= rewrite_all_headers; break;
1520 case 's': next->flags |= rewrite_sender; break;
1521 case 'f': next->flags |= rewrite_from; break;
1522 case 't': next->flags |= rewrite_to; break;
1523 case 'c': next->flags |= rewrite_cc; break;
1524 case 'b': next->flags |= rewrite_bcc; break;
1525 case 'r': next->flags |= rewrite_replyto; break;
1526
1527 case 'E': next->flags |= rewrite_all_envelope; break;
1528 case 'F': next->flags |= rewrite_envfrom; break;
1529 case 'T': next->flags |= rewrite_envto; break;
1530
1531 case 'Q': next->flags |= rewrite_qualify; break;
1532 case 'R': next->flags |= rewrite_repeat; break;
1533
1534 case 'S':
1535 next->flags |= rewrite_smtp;
1536 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1538 "rewrite rule has the S flag but is not a regular expression");
1539 break;
1540
1541 default:
1542 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1543 "unknown rewrite flag character '%c' "
1544 "(could be missing quotes round replacement item)", p[-1]);
1545 break;
1546 }
1547
1548 /* If no action flags are set, set all the "normal" rewrites. */
1549
1550 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1551 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1552
1553 /* Remember which exist, for optimization, and return the rule */
1554
1555 *existflags |= next->flags;
1556 return next;
1557 }
1558
1559
1560
1561
1562 /*************************************************
1563 * Read global rewrite information *
1564 *************************************************/
1565
1566 /* Each line is a single rewrite rule; it is parsed into a control block
1567 by readconf_one_rewrite(), and its flags are ORed into the global flag
1568 word rewrite_existflags. */
1569
1570 void
1571 readconf_rewrites(void)
1572 {
1573 rewrite_rule **chain = &global_rewrite_rules;
1574 uschar *p;
1575
1576 while ((p = get_config_line()) != NULL)
1577 {
1578 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1579 *chain = next;
1580 chain = &(next->next);
1581 }
1582 }
1583
1584
1585
1586 /*************************************************
1587 * Read a string *
1588 *************************************************/
1589
1590 /* Strings are read into the normal store pool. As long we aren't too
1591 near the end of the current block, the string will just use what is necessary
1592 on the top of the stacking pool, because string_cat() uses the extension
1593 mechanism.
1594
1595 Argument:
1596 s the rest of the input line
1597 name the option name (for errors)
1598
1599 Returns: pointer to the string
1600 */
1601
1602 static uschar *
1603 read_string(const uschar *s, const uschar *name)
1604 {
1605 uschar *yield;
1606 const uschar *ss;
1607
1608 if (*s != '\"') return string_copy(s);
1609
1610 ss = s;
1611 yield = string_dequote(&s);
1612
1613 if (s == ss+1 || s[-1] != '\"')
1614 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1615 "missing quote at end of string value for %s", name);
1616
1617 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1618
1619 return yield;
1620 }
1621
1622
1623 /*************************************************
1624 * Custom-handler options *
1625 *************************************************/
1626 static void
1627 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1628 {
1629 if (*str == '$')
1630 smtp_receive_timeout_s = string_copy(str);
1631 else
1632 {
1633 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1634 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1635 if (smtp_receive_timeout < 0)
1636 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1637 name);
1638 }
1639 }
1640
1641 /*************************************************
1642 * Handle option line *
1643 *************************************************/
1644
1645 /* This function is called from several places to process a line containing the
1646 setting of an option. The first argument is the line to be decoded; it has been
1647 checked not to be empty and not to start with '#'. Trailing newlines and white
1648 space have been removed. The second argument is a pointer to the list of
1649 variable names that are to be recognized, together with their types and
1650 locations, and the third argument gives the number of entries in the list.
1651
1652 The fourth argument is a pointer to a data block. If it is NULL, then the data
1653 values in the options list are absolute addresses. Otherwise, they are byte
1654 offsets in the data block.
1655
1656 String option data may continue onto several lines; this function reads further
1657 data from config_file if necessary.
1658
1659 The yield of this function is normally zero. If a string continues onto
1660 multiple lines, then the data value is permitted to be followed by a comma
1661 or a semicolon (for use in drivers) and the yield is that character.
1662
1663 Arguments:
1664 buffer contains the configuration line to be handled
1665 oltop points to the start of the relevant option list
1666 last one more than the offset of the last item in the option list
1667 data_block NULL when reading main options => data values in the option
1668 list are absolute addresses; otherwise they are byte offsets
1669 in data_block when they have opt_public set; otherwise
1670 they are byte offsets in data_block->options_block.
1671 unknown_txt format string to use in panic message for unknown option;
1672 must contain %s for option name
1673 if given as NULL, don't panic on unknown option
1674
1675 Returns: TRUE if an option was read successfully,
1676 FALSE false for an unknown option if unknown_txt == NULL,
1677 otherwise panic and die on an unknown option
1678 */
1679
1680 static BOOL
1681 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1682 void *data_block, uschar *unknown_txt)
1683 {
1684 int ptr = 0;
1685 int offset = 0;
1686 int n, count, type, value;
1687 int issecure = 0;
1688 uid_t uid;
1689 gid_t gid;
1690 BOOL boolvalue = TRUE;
1691 BOOL freesptr = TRUE;
1692 optionlist *ol, *ol2;
1693 struct passwd *pw;
1694 void *reset_point;
1695 int intbase = 0;
1696 uschar *inttype = US"";
1697 uschar *sptr;
1698 uschar *s = buffer;
1699 uschar **str_target;
1700 uschar name[64];
1701 uschar name2[64];
1702
1703 /* There may be leading spaces; thereafter, we expect an option name starting
1704 with a letter. */
1705
1706 while (isspace(*s)) s++;
1707 if (!isalpha(*s))
1708 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1709
1710 /* Read the name of the option, and skip any subsequent white space. If
1711 it turns out that what we read was "hide", set the flag indicating that
1712 this is a secure option, and loop to read the next word. */
1713
1714 for (n = 0; n < 2; n++)
1715 {
1716 while (isalnum(*s) || *s == '_')
1717 {
1718 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1719 s++;
1720 }
1721 name[ptr] = 0;
1722 while (isspace(*s)) s++;
1723 if (Ustrcmp(name, "hide") != 0) break;
1724 issecure = opt_secure;
1725 ptr = 0;
1726 }
1727
1728 /* Deal with "no_" or "not_" here for booleans */
1729
1730 if (Ustrncmp(name, "no_", 3) == 0)
1731 {
1732 boolvalue = FALSE;
1733 offset = 3;
1734 }
1735
1736 if (Ustrncmp(name, "not_", 4) == 0)
1737 {
1738 boolvalue = FALSE;
1739 offset = 4;
1740 }
1741
1742 /* Search the list for the given name. A non-existent name, or an option that
1743 is set twice, is a disaster. */
1744
1745 if (!(ol = find_option(name + offset, oltop, last)))
1746 {
1747 if (unknown_txt == NULL) return FALSE;
1748 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1749 }
1750
1751 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1752 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1753 "\"%s\" option set for the second time", name);
1754
1755 ol->type |= opt_set | issecure;
1756 type = ol->type & opt_mask;
1757
1758 /* Types with data values must be followed by '='; the "no[t]_" prefix
1759 applies only to boolean values. */
1760
1761 if (type < opt_bool || type > opt_bool_last)
1762 {
1763 if (offset != 0)
1764 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1765 "negation prefix applied to a non-boolean option");
1766 if (*s == 0)
1767 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1768 "unexpected end of line (data missing) after %s", name);
1769 if (*s != '=')
1770 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1771 }
1772
1773 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1774 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1775 ultimately expands to one of those values. */
1776
1777 else if (*s != 0 && (offset != 0 || *s != '='))
1778 extra_chars_error(s, US"boolean option ", name, US"");
1779
1780 /* Skip white space after = */
1781
1782 if (*s == '=') while (isspace((*(++s))));
1783
1784 /* If there is a data block and the opt_public flag is not set, change
1785 the data block pointer to the private options block. */
1786
1787 if (data_block != NULL && (ol->type & opt_public) == 0)
1788 data_block = (void *)(((driver_instance *)data_block)->options_block);
1789
1790 /* Now get the data according to the type. */
1791
1792 switch (type)
1793 {
1794 /* If a string value is not enclosed in quotes, it consists of
1795 the rest of the current line, verbatim. Otherwise, string escapes
1796 are processed.
1797
1798 A transport is specified as a string, which is then looked up in the
1799 list of transports. A search type is specified as one of a number of
1800 known strings.
1801
1802 A set or rewrite rules for a driver is specified as a string, which is
1803 then parsed into a suitable chain of control blocks.
1804
1805 Uids and gids are specified as strings which are then looked up in the
1806 passwd file. Lists of uids and gids are similarly specified as colon-
1807 separated strings. */
1808
1809 case opt_stringptr:
1810 case opt_uid:
1811 case opt_gid:
1812 case opt_expand_uid:
1813 case opt_expand_gid:
1814 case opt_uidlist:
1815 case opt_gidlist:
1816 case opt_rewrite:
1817
1818 reset_point = sptr = read_string(s, name);
1819
1820 /* Having read a string, we now have several different ways of using it,
1821 depending on the data type, so do another switch. If keeping the actual
1822 string is not required (because it is interpreted), freesptr is set TRUE,
1823 and at the end we reset the pool. */
1824
1825 switch (type)
1826 {
1827 /* If this was a string, set the variable to point to the new string,
1828 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1829 rules, we still keep the string (for printing), and parse the rules into a
1830 control block and flags word. */
1831
1832 case opt_stringptr:
1833 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1834 : USS (ol->value);
1835 if (ol->type & opt_rep_con)
1836 {
1837 uschar * saved_condition;
1838 /* We already have a condition, we're conducting a crude hack to let
1839 multiple condition rules be chained together, despite storing them in
1840 text form. */
1841 *str_target = string_copy_malloc( (saved_condition = *str_target)
1842 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1843 saved_condition, sptr)
1844 : sptr);
1845 /* TODO(pdp): there is a memory leak here and just below
1846 when we set 3 or more conditions; I still don't
1847 understand the store mechanism enough to know
1848 what's the safe way to free content from an earlier store.
1849 AFAICT, stores stack, so freeing an early stored item also stores
1850 all data alloc'd after it. If we knew conditions were adjacent,
1851 we could survive that, but we don't. So I *think* we need to take
1852 another bit from opt_type to indicate "malloced"; this seems like
1853 quite a hack, especially for this one case. It also means that
1854 we can't ever reclaim the store from the *first* condition.
1855
1856 Because we only do this once, near process start-up, I'm prepared to
1857 let this slide for the time being, even though it rankles. */
1858 }
1859 else if (ol->type & opt_rep_str)
1860 {
1861 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1862 int sep_i = -(int)sep_o;
1863 const uschar * list = sptr;
1864 uschar * s;
1865 uschar * list_o = *str_target;
1866
1867 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1868 list_o = string_append_listele(list_o, sep_o, s);
1869 if (list_o)
1870 *str_target = string_copy_malloc(list_o);
1871 }
1872 else
1873 {
1874 *str_target = sptr;
1875 freesptr = FALSE;
1876 }
1877 break;
1878
1879 case opt_rewrite:
1880 if (data_block)
1881 *USS (US data_block + (long int)(ol->value)) = sptr;
1882 else
1883 *USS (ol->value) = sptr;
1884 freesptr = FALSE;
1885 if (type == opt_rewrite)
1886 {
1887 int sep = 0;
1888 int *flagptr;
1889 uschar *p = sptr;
1890 rewrite_rule **chain;
1891 optionlist *ol3;
1892
1893 sprintf(CS name2, "*%.50s_rules", name);
1894 ol2 = find_option(name2, oltop, last);
1895 sprintf(CS name2, "*%.50s_flags", name);
1896 ol3 = find_option(name2, oltop, last);
1897
1898 if (ol2 == NULL || ol3 == NULL)
1899 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1900 "rewrite rules not available for driver");
1901
1902 if (data_block == NULL)
1903 {
1904 chain = (rewrite_rule **)(ol2->value);
1905 flagptr = (int *)(ol3->value);
1906 }
1907 else
1908 {
1909 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1910 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1911 }
1912
1913 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1914 {
1915 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1916 *chain = next;
1917 chain = &(next->next);
1918 }
1919
1920 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1921 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1922 "non-header rewrite - not allowed at transport time -");
1923 }
1924 break;
1925
1926 /* If it was an expanded uid, see if there is any expansion to be
1927 done by checking for the presence of a $ character. If there is, save it
1928 in the corresponding *expand_user option field. Otherwise, fall through
1929 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1930 of data. */
1931
1932 case opt_expand_uid:
1933 sprintf(CS name2, "*expand_%.50s", name);
1934 ol2 = find_option(name2, oltop, last);
1935 if (ol2 != NULL)
1936 {
1937 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1938
1939 if (data_block == NULL)
1940 *((uschar **)(ol2->value)) = ss;
1941 else
1942 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1943
1944 if (ss != NULL)
1945 {
1946 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1947 freesptr = FALSE;
1948 break;
1949 }
1950 }
1951
1952 /* Look up a fixed uid, and also make use of the corresponding gid
1953 if a passwd entry is returned and the gid has not been set. */
1954
1955 case opt_uid:
1956 if (!route_finduser(sptr, &pw, &uid))
1957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1958 if (data_block == NULL)
1959 *((uid_t *)(ol->value)) = uid;
1960 else
1961 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1962
1963 /* Set the flag indicating a fixed value is set */
1964
1965 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1966
1967 /* Handle matching gid if we have a passwd entry: done by finding the
1968 same name with terminating "user" changed to "group"; if not found,
1969 ignore. Also ignore if the value is already set. */
1970
1971 if (pw == NULL) break;
1972 Ustrcpy(name+Ustrlen(name)-4, "group");
1973 ol2 = find_option(name, oltop, last);
1974 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1975 (ol2->type & opt_mask) == opt_expand_gid))
1976 {
1977 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1978 if (! *set_flag)
1979 {
1980 if (data_block == NULL)
1981 *((gid_t *)(ol2->value)) = pw->pw_gid;
1982 else
1983 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1984 *set_flag = TRUE;
1985 }
1986 }
1987 break;
1988
1989 /* If it was an expanded gid, see if there is any expansion to be
1990 done by checking for the presence of a $ character. If there is, save it
1991 in the corresponding *expand_user option field. Otherwise, fall through
1992 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1993 of data. */
1994
1995 case opt_expand_gid:
1996 sprintf(CS name2, "*expand_%.50s", name);
1997 ol2 = find_option(name2, oltop, last);
1998 if (ol2 != NULL)
1999 {
2000 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
2001
2002 if (data_block == NULL)
2003 *((uschar **)(ol2->value)) = ss;
2004 else
2005 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
2006
2007 if (ss != NULL)
2008 {
2009 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2010 freesptr = FALSE;
2011 break;
2012 }
2013 }
2014
2015 /* Handle freestanding gid */
2016
2017 case opt_gid:
2018 if (!route_findgroup(sptr, &gid))
2019 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2020 if (data_block == NULL)
2021 *((gid_t *)(ol->value)) = gid;
2022 else
2023 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
2024 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2025 break;
2026
2027 /* If it was a uid list, look up each individual entry, and build
2028 a vector of uids, with a count in the first element. Put the vector
2029 in malloc store so we can free the string. (We are reading into
2030 permanent store already.) */
2031
2032 case opt_uidlist:
2033 {
2034 int count = 1;
2035 uid_t *list;
2036 int ptr = 0;
2037 const uschar *p;
2038 const uschar *op = expand_string (sptr);
2039
2040 if (op == NULL)
2041 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2042 name, expand_string_message);
2043
2044 p = op;
2045 if (*p != 0) count++;
2046 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2047 list = store_malloc(count*sizeof(uid_t));
2048 list[ptr++] = (uid_t)(count - 1);
2049
2050 if (data_block == NULL)
2051 *((uid_t **)(ol->value)) = list;
2052 else
2053 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2054
2055 p = op;
2056 while (count-- > 1)
2057 {
2058 int sep = 0;
2059 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2060 if (!route_finduser(big_buffer, NULL, &uid))
2061 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2062 big_buffer);
2063 list[ptr++] = uid;
2064 }
2065 }
2066 break;
2067
2068 /* If it was a gid list, look up each individual entry, and build
2069 a vector of gids, with a count in the first element. Put the vector
2070 in malloc store so we can free the string. (We are reading into permanent
2071 store already.) */
2072
2073 case opt_gidlist:
2074 {
2075 int count = 1;
2076 gid_t *list;
2077 int ptr = 0;
2078 const uschar *p;
2079 const uschar *op = expand_string (sptr);
2080
2081 if (op == NULL)
2082 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2083 name, expand_string_message);
2084
2085 p = op;
2086 if (*p != 0) count++;
2087 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2088 list = store_malloc(count*sizeof(gid_t));
2089 list[ptr++] = (gid_t)(count - 1);
2090
2091 if (data_block == NULL)
2092 *((gid_t **)(ol->value)) = list;
2093 else
2094 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
2095
2096 p = op;
2097 while (count-- > 1)
2098 {
2099 int sep = 0;
2100 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2101 if (!route_findgroup(big_buffer, &gid))
2102 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2103 big_buffer);
2104 list[ptr++] = gid;
2105 }
2106 }
2107 break;
2108 }
2109
2110 /* Release store if the value of the string doesn't need to be kept. */
2111
2112 if (freesptr) store_reset(reset_point);
2113 break;
2114
2115 /* Expanded boolean: if no characters follow, or if there are no dollar
2116 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2117 save the string for later expansion in the alternate place. */
2118
2119 case opt_expand_bool:
2120 if (*s != 0 && Ustrchr(s, '$') != 0)
2121 {
2122 sprintf(CS name2, "*expand_%.50s", name);
2123 ol2 = find_option(name2, oltop, last);
2124 if (ol2 != NULL)
2125 {
2126 reset_point = sptr = read_string(s, name);
2127 if (data_block == NULL)
2128 *((uschar **)(ol2->value)) = sptr;
2129 else
2130 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
2131 freesptr = FALSE;
2132 break;
2133 }
2134 }
2135 /* Fall through */
2136
2137 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2138 look for yes/not/true/false. Some booleans are stored in a single bit in
2139 a single int. There's a special fudge for verify settings; without a suffix
2140 they set both xx_sender and xx_recipient. The table points to the sender
2141 value; search subsequently for the recipient. There's another special case:
2142 opt_bool_set also notes when a boolean has been set. */
2143
2144 case opt_bool:
2145 case opt_bit:
2146 case opt_bool_verify:
2147 case opt_bool_set:
2148 if (*s != 0)
2149 {
2150 s = readconf_readname(name2, 64, s);
2151 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2152 boolvalue = TRUE;
2153 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2154 boolvalue = FALSE;
2155 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2156 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2157 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2158 US"for boolean option ", name);
2159 }
2160
2161 /* Handle single-bit type. */
2162
2163 if (type == opt_bit)
2164 {
2165 int bit = 1 << ((ol->type >> 16) & 31);
2166 int *ptr = (data_block == NULL)?
2167 (int *)(ol->value) :
2168 (int *)((uschar *)data_block + (long int)ol->value);
2169 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2170 break;
2171 }
2172
2173 /* Handle full BOOL types */
2174
2175 if (data_block == NULL)
2176 *((BOOL *)(ol->value)) = boolvalue;
2177 else
2178 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
2179
2180 /* Verify fudge */
2181
2182 if (type == opt_bool_verify)
2183 {
2184 sprintf(CS name2, "%.50s_recipient", name + offset);
2185 ol2 = find_option(name2, oltop, last);
2186 if (ol2 != NULL)
2187 {
2188 if (data_block == NULL)
2189 *((BOOL *)(ol2->value)) = boolvalue;
2190 else
2191 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
2192 }
2193 }
2194
2195 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2196
2197 else if (type == opt_bool_set)
2198 {
2199 sprintf(CS name2, "*set_%.50s", name + offset);
2200 ol2 = find_option(name2, oltop, last);
2201 if (ol2 != NULL)
2202 {
2203 if (data_block == NULL)
2204 *((BOOL *)(ol2->value)) = TRUE;
2205 else
2206 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
2207 }
2208 }
2209 break;
2210
2211 /* Octal integer */
2212
2213 case opt_octint:
2214 intbase = 8;
2215 inttype = US"octal ";
2216
2217 /* Integer: a simple(ish) case; allow octal and hex formats, and
2218 suffixes K, M and G. The different types affect output, not input. */
2219
2220 case opt_mkint:
2221 case opt_int:
2222 {
2223 uschar *endptr;
2224 long int lvalue;
2225
2226 errno = 0;
2227 lvalue = strtol(CS s, CSS &endptr, intbase);
2228
2229 if (endptr == s)
2230 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2231 inttype, name);
2232
2233 if (errno != ERANGE)
2234 if (tolower(*endptr) == 'k')
2235 {
2236 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
2237 else lvalue *= 1024;
2238 endptr++;
2239 }
2240 else if (tolower(*endptr) == 'm')
2241 {
2242 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
2243 errno = ERANGE;
2244 else lvalue *= 1024*1024;
2245 endptr++;
2246 }
2247 else if (tolower(*endptr) == 'g')
2248 {
2249 if (lvalue > INT_MAX/(1024*1024*1024) || lvalue < INT_MIN/(1024*1024*1024))
2250 errno = ERANGE;
2251 else lvalue *= 1024*1024*1024;
2252 endptr++;
2253 }
2254
2255 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2256 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2257 "absolute value of integer \"%s\" is too large (overflow)", s);
2258
2259 while (isspace(*endptr)) endptr++;
2260 if (*endptr != 0)
2261 extra_chars_error(endptr, inttype, US"integer value for ", name);
2262
2263 value = (int)lvalue;
2264 }
2265
2266 if (data_block == NULL)
2267 *((int *)(ol->value)) = value;
2268 else
2269 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2270 break;
2271
2272 /* Integer held in K: again, allow octal and hex formats, and suffixes K, M
2273 and G. */
2274 /*XXX consider moving to int_eximarith_t (but mind the overflow test 0415) */
2275
2276 case opt_Kint:
2277 {
2278 uschar *endptr;
2279 errno = 0;
2280 value = strtol(CS s, CSS &endptr, intbase);
2281
2282 if (endptr == s)
2283 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2284 inttype, name);
2285
2286 if (errno != ERANGE)
2287 if (tolower(*endptr) == 'g')
2288 {
2289 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
2290 errno = ERANGE;
2291 else
2292 value *= 1024*1024;
2293 endptr++;
2294 }
2295 else if (tolower(*endptr) == 'm')
2296 {
2297 if (value > INT_MAX/1024 || value < INT_MIN/1024)
2298 errno = ERANGE;
2299 else
2300 value *= 1024;
2301 endptr++;
2302 }
2303 else if (tolower(*endptr) == 'k')
2304 endptr++;
2305 else
2306 value = (value + 512)/1024;
2307
2308 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2309 "absolute value of integer \"%s\" is too large (overflow)", s);
2310
2311 while (isspace(*endptr)) endptr++;
2312 if (*endptr != 0)
2313 extra_chars_error(endptr, inttype, US"integer value for ", name);
2314 }
2315
2316 if (data_block == NULL)
2317 *((int *)(ol->value)) = value;
2318 else
2319 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2320 break;
2321
2322 /* Fixed-point number: held to 3 decimal places. */
2323
2324 case opt_fixed:
2325 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2326 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2327 "fixed-point number expected for %s", name);
2328
2329 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2330 "integer \"%s\" is too large (overflow)", s);
2331
2332 value *= 1000;
2333
2334 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2335 "integer \"%s\" is too large (overflow)", s);
2336
2337 /* We get a coverity error here for using count, as it derived
2338 from the tainted buffer pointed to by s, as parsed by sscanf().
2339 By the definition of sscanf we must be aceessing between start
2340 and end of s (assuming it is nul-terminated...) so ignore the error. */
2341 /* coverity[tainted_data] */
2342 if (s[count] == '.')
2343 {
2344 int d = 100;
2345 while (isdigit(s[++count]))
2346 {
2347 value += (s[count] - '0') * d;
2348 d /= 10;
2349 }
2350 }
2351
2352 while (isspace(s[count])) count++;
2353
2354 if (s[count] != 0)
2355 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2356
2357 if (data_block == NULL)
2358 *((int *)(ol->value)) = value;
2359 else
2360 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2361 break;
2362
2363 /* There's a special routine to read time values. */
2364
2365 case opt_time:
2366 value = readconf_readtime(s, 0, FALSE);
2367 if (value < 0)
2368 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2369 name);
2370 if (data_block == NULL)
2371 *((int *)(ol->value)) = value;
2372 else
2373 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2374 break;
2375
2376 /* A time list is a list of colon-separated times, with the first
2377 element holding the size of the list and the second the number of
2378 entries used. */
2379
2380 case opt_timelist:
2381 {
2382 int count = 0;
2383 int *list = (data_block == NULL)?
2384 (int *)(ol->value) :
2385 (int *)((uschar *)data_block + (long int)(ol->value));
2386
2387 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2388 {
2389 int terminator = 0;
2390 uschar *snext = Ustrchr(s, ':');
2391 if (snext != NULL)
2392 {
2393 uschar *ss = snext;
2394 while (ss > s && isspace(ss[-1])) ss--;
2395 terminator = *ss;
2396 }
2397 value = readconf_readtime(s, terminator, FALSE);
2398 if (value < 0)
2399 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2400 name);
2401 if (count > 1 && value <= list[count])
2402 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2403 "time value out of order for %s", name);
2404 list[count+1] = value;
2405 if (snext == NULL) break;
2406 s = snext + 1;
2407 while (isspace(*s)) s++;
2408 }
2409
2410 if (count > list[0] - 2)
2411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2412 name);
2413 if (count > 0 && list[2] == 0) count = 0;
2414 list[1] = count;
2415 break;
2416 }
2417
2418 case opt_func:
2419 {
2420 void (*fn)() = ol->value;
2421 fn(name, s);
2422 break;
2423 }
2424 }
2425
2426 return TRUE;
2427 }
2428
2429
2430
2431 /*************************************************
2432 * Print a time value *
2433 *************************************************/
2434
2435 /*
2436 Argument: a time value in seconds
2437 Returns: pointer to a fixed buffer containing the time as a string,
2438 in readconf_readtime() format
2439 */
2440
2441 uschar *
2442 readconf_printtime(int t)
2443 {
2444 int s, m, h, d, w;
2445 uschar *p = time_buffer;
2446
2447 if (t < 0)
2448 {
2449 *p++ = '-';
2450 t = -t;
2451 }
2452
2453 s = t % 60;
2454 t /= 60;
2455 m = t % 60;
2456 t /= 60;
2457 h = t % 24;
2458 t /= 24;
2459 d = t % 7;
2460 w = t/7;
2461
2462 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2463 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2464 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2465 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2466 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2467
2468 return time_buffer;
2469 }
2470
2471
2472
2473 /*************************************************
2474 * Print an individual option value *
2475 *************************************************/
2476
2477 /* This is used by the -bP option, so prints to the standard output.
2478 The entire options list is passed in as an argument, because some options come
2479 in pairs - typically uid/gid settings, which can either be explicit numerical
2480 values, or strings to be expanded later. If the numerical value is unset,
2481 search for "*expand_<name>" to see if there is a string equivalent.
2482
2483 Arguments:
2484 ol option entry, or NULL for an unknown option
2485 name option name
2486 options_block NULL for main configuration options; otherwise points to
2487 a driver block; if the option doesn't have opt_public
2488 set, then options_block->options_block is where the item
2489 resides.
2490 oltop points to the option list in which ol exists
2491 last one more than the offset of the last entry in optop
2492 no_labels do not show "foo = " at the start.
2493
2494 Returns: nothing
2495 */
2496
2497 static void
2498 print_ol(optionlist *ol, uschar *name, void *options_block,
2499 optionlist *oltop, int last, BOOL no_labels)
2500 {
2501 struct passwd *pw;
2502 struct group *gr;
2503 optionlist *ol2;
2504 void *value;
2505 uid_t *uidlist;
2506 gid_t *gidlist;
2507 uschar *s;
2508 uschar name2[64];
2509
2510 if (ol == NULL)
2511 {
2512 printf("%s is not a known option\n", name);
2513 return;
2514 }
2515
2516 /* Non-admin callers cannot see options that have been flagged secure by the
2517 "hide" prefix. */
2518
2519 if (!admin_user && (ol->type & opt_secure) != 0)
2520 {
2521 if (no_labels)
2522 printf("%s\n", hidden);
2523 else
2524 printf("%s = %s\n", name, hidden);
2525 return;
2526 }
2527
2528 /* Else show the value of the option */
2529
2530 value = ol->value;
2531 if (options_block != NULL)
2532 {
2533 if ((ol->type & opt_public) == 0)
2534 options_block = (void *)(((driver_instance *)options_block)->options_block);
2535 value = (void *)((uschar *)options_block + (long int)value);
2536 }
2537
2538 switch(ol->type & opt_mask)
2539 {
2540 case opt_stringptr:
2541 case opt_rewrite: /* Show the text value */
2542 s = *((uschar **)value);
2543 if (!no_labels) printf("%s = ", name);
2544 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2545 break;
2546
2547 case opt_int:
2548 if (!no_labels) printf("%s = ", name);
2549 printf("%d\n", *((int *)value));
2550 break;
2551
2552 case opt_mkint:
2553 {
2554 int x = *((int *)value);
2555 if (x != 0 && (x & 1023) == 0)
2556 {
2557 int c = 'K';
2558 x >>= 10;
2559 if ((x & 1023) == 0)
2560 {
2561 c = 'M';
2562 x >>= 10;
2563 }
2564 if (!no_labels) printf("%s = ", name);
2565 printf("%d%c\n", x, c);
2566 }
2567 else
2568 {
2569 if (!no_labels) printf("%s = ", name);
2570 printf("%d\n", x);
2571 }
2572 }
2573 break;
2574
2575 case opt_Kint:
2576 {
2577 int x = *((int *)value);
2578 if (!no_labels) printf("%s = ", name);
2579 if (x == 0) printf("0\n");
2580 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2581 else printf("%dK\n", x);
2582 }
2583 break;
2584
2585 case opt_octint:
2586 if (!no_labels) printf("%s = ", name);
2587 printf("%#o\n", *((int *)value));
2588 break;
2589
2590 /* Can be negative only when "unset", in which case integer */
2591
2592 case opt_fixed:
2593 {
2594 int x = *((int *)value);
2595 int f = x % 1000;
2596 int d = 100;
2597 if (x < 0) printf("%s =\n", name); else
2598 {
2599 if (!no_labels) printf("%s = ", name);
2600 printf("%d.", x/1000);
2601 do
2602 {
2603 printf("%d", f/d);
2604 f %= d;
2605 d /= 10;
2606 }
2607 while (f != 0);
2608 printf("\n");
2609 }
2610 }
2611 break;
2612
2613 /* If the numerical value is unset, try for the string value */
2614
2615 case opt_expand_uid:
2616 if (! *get_set_flag(name, oltop, last, options_block))
2617 {
2618 sprintf(CS name2, "*expand_%.50s", name);
2619 ol2 = find_option(name2, oltop, last);
2620 if (ol2 != NULL)
2621 {
2622 void *value2 = ol2->value;
2623 if (options_block != NULL)
2624 value2 = (void *)((uschar *)options_block + (long int)value2);
2625 s = *((uschar **)value2);
2626 if (!no_labels) printf("%s = ", name);
2627 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2628 break;
2629 }
2630 }
2631
2632 /* Else fall through */
2633
2634 case opt_uid:
2635 if (!no_labels) printf("%s = ", name);
2636 if (! *get_set_flag(name, oltop, last, options_block))
2637 printf("\n");
2638 else
2639 {
2640 pw = getpwuid(*((uid_t *)value));
2641 if (pw == NULL)
2642 printf("%ld\n", (long int)(*((uid_t *)value)));
2643 else printf("%s\n", pw->pw_name);
2644 }
2645 break;
2646
2647 /* If the numerical value is unset, try for the string value */
2648
2649 case opt_expand_gid:
2650 if (! *get_set_flag(name, oltop, last, options_block))
2651 {
2652 sprintf(CS name2, "*expand_%.50s", name);
2653 ol2 = find_option(name2, oltop, last);
2654 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2655 {
2656 void *value2 = ol2->value;
2657 if (options_block != NULL)
2658 value2 = (void *)((uschar *)options_block + (long int)value2);
2659 s = *((uschar **)value2);
2660 if (!no_labels) printf("%s = ", name);
2661 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2662 break;
2663 }
2664 }
2665
2666 /* Else fall through */
2667
2668 case opt_gid:
2669 if (!no_labels) printf("%s = ", name);
2670 if (! *get_set_flag(name, oltop, last, options_block))
2671 printf("\n");
2672 else
2673 {
2674 gr = getgrgid(*((int *)value));
2675 if (gr == NULL)
2676 printf("%ld\n", (long int)(*((int *)value)));
2677 else printf("%s\n", gr->gr_name);
2678 }
2679 break;
2680
2681 case opt_uidlist:
2682 uidlist = *((uid_t **)value);
2683 if (!no_labels) printf("%s =", name);
2684 if (uidlist != NULL)
2685 {
2686 int i;
2687 uschar sep = ' ';
2688 if (no_labels) sep = '\0';
2689 for (i = 1; i <= (int)(uidlist[0]); i++)
2690 {
2691 uschar *name = NULL;
2692 pw = getpwuid(uidlist[i]);
2693 if (pw != NULL) name = US pw->pw_name;
2694 if (sep != '\0') printf("%c", sep);
2695 if (name != NULL) printf("%s", name);
2696 else printf("%ld", (long int)(uidlist[i]));
2697 sep = ':';
2698 }
2699 }
2700 printf("\n");
2701 break;
2702
2703 case opt_gidlist:
2704 gidlist = *((gid_t **)value);
2705 if (!no_labels) printf("%s =", name);
2706 if (gidlist != NULL)
2707 {
2708 int i;
2709 uschar sep = ' ';
2710 if (no_labels) sep = '\0';
2711 for (i = 1; i <= (int)(gidlist[0]); i++)
2712 {
2713 uschar *name = NULL;
2714 gr = getgrgid(gidlist[i]);
2715 if (gr != NULL) name = US gr->gr_name;
2716 if (sep != '\0') printf("%c", sep);
2717 if (name != NULL) printf("%s", name);
2718 else printf("%ld", (long int)(gidlist[i]));
2719 sep = ':';
2720 }
2721 }
2722 printf("\n");
2723 break;
2724
2725 case opt_time:
2726 if (!no_labels) printf("%s = ", name);
2727 printf("%s\n", readconf_printtime(*((int *)value)));
2728 break;
2729
2730 case opt_timelist:
2731 {
2732 int i;
2733 int *list = (int *)value;
2734 if (!no_labels) printf("%s = ", name);
2735 for (i = 0; i < list[1]; i++)
2736 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2737 printf("\n");
2738 }
2739 break;
2740
2741 case opt_bit:
2742 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2743 "" : "no_", name);
2744 break;
2745
2746 case opt_expand_bool:
2747 sprintf(CS name2, "*expand_%.50s", name);
2748 ol2 = find_option(name2, oltop, last);
2749 if (ol2 != NULL && ol2->value != NULL)
2750 {
2751 void *value2 = ol2->value;
2752 if (options_block != NULL)
2753 value2 = (void *)((uschar *)options_block + (long int)value2);
2754 s = *((uschar **)value2);
2755 if (s != NULL)
2756 {
2757 if (!no_labels) printf("%s = ", name);
2758 printf("%s\n", string_printing(s));
2759 break;
2760 }
2761 /* s == NULL => string not set; fall through */
2762 }
2763
2764 /* Fall through */
2765
2766 case opt_bool:
2767 case opt_bool_verify:
2768 case opt_bool_set:
2769 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2770 break;
2771 }
2772 }
2773
2774
2775
2776 /*************************************************
2777 * Print value from main configuration *
2778 *************************************************/
2779
2780 /* This function, called as a result of encountering the -bP option,
2781 causes the value of any main configuration variable to be output if the
2782 second argument is NULL. There are some special values:
2783
2784 all print all main configuration options
2785 config_file print the name of the configuration file
2786 (configure_file will still work, for backward
2787 compatibility)
2788 routers print the routers' configurations
2789 transports print the transports' configuration
2790 authenticators print the authenticators' configuration
2791 macros print the macros' configuration
2792 router_list print a list of router names
2793 transport_list print a list of transport names
2794 authenticator_list print a list of authentication mechanism names
2795 macro_list print a list of macro names
2796 +name print a named list item
2797 local_scan print the local_scan options
2798 config print the configuration as it is parsed
2799 environment print the used execution environment
2800
2801 If the second argument is not NULL, it must be one of "router", "transport",
2802 "authenticator" or "macro" in which case the first argument identifies the
2803 driver whose options are to be printed.
2804
2805 Arguments:
2806 name option name if type == NULL; else driver name
2807 type NULL or driver type name, as described above
2808 no_labels avoid the "foo = " at the start of an item
2809
2810 Returns: nothing
2811 */
2812
2813 void
2814 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2815 {
2816 BOOL names_only = FALSE;
2817 optionlist *ol;
2818 optionlist *ol2 = NULL;
2819 driver_instance *d = NULL;
2820 macro_item *m;
2821 int size = 0;
2822
2823 if (type == NULL)
2824 {
2825 if (*name == '+')
2826 {
2827 int i;
2828 tree_node *t;
2829 BOOL found = FALSE;
2830 static uschar *types[] = { US"address", US"domain", US"host",
2831 US"localpart" };
2832 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2833 &hostlist_anchor, &localpartlist_anchor };
2834
2835 for (i = 0; i < 4; i++)
2836 {
2837 t = tree_search(*(anchors[i]), name+1);
2838 if (t != NULL)
2839 {
2840 found = TRUE;
2841 if (no_labels)
2842 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2843 else
2844 printf("%slist %s = %s\n", types[i], name+1,
2845 ((namedlist_block *)(t->data.ptr))->string);
2846 }
2847 }
2848
2849 if (!found)
2850 printf("no address, domain, host, or local part list called \"%s\" "
2851 "exists\n", name+1);
2852
2853 return;
2854 }
2855
2856 if ( Ustrcmp(name, "configure_file") == 0
2857 || Ustrcmp(name, "config_file") == 0)
2858 {
2859 printf("%s\n", CS config_main_filename);
2860 return;
2861 }
2862
2863 if (Ustrcmp(name, "all") == 0)
2864 {
2865 for (ol = optionlist_config;
2866 ol < optionlist_config + nelem(optionlist_config); ol++)
2867 {
2868 if ((ol->type & opt_hidden) == 0)
2869 print_ol(ol, US ol->name, NULL,
2870 optionlist_config, nelem(optionlist_config),
2871 no_labels);
2872 }
2873 return;
2874 }
2875
2876 if (Ustrcmp(name, "local_scan") == 0)
2877 {
2878 #ifndef LOCAL_SCAN_HAS_OPTIONS
2879 printf("local_scan() options are not supported\n");
2880 #else
2881 for (ol = local_scan_options;
2882 ol < local_scan_options + local_scan_options_count; ol++)
2883 {
2884 print_ol(ol, US ol->name, NULL, local_scan_options,
2885 local_scan_options_count, no_labels);
2886 }
2887 #endif
2888 return;
2889 }
2890
2891 if (Ustrcmp(name, "config") == 0)
2892 {
2893 print_config(admin_user, no_labels);
2894 return;
2895 }
2896
2897 if (Ustrcmp(name, "routers") == 0)
2898 {
2899 type = US"router";
2900 name = NULL;
2901 }
2902 else if (Ustrcmp(name, "transports") == 0)
2903 {
2904 type = US"transport";
2905 name = NULL;
2906 }
2907
2908 else if (Ustrcmp(name, "authenticators") == 0)
2909 {
2910 type = US"authenticator";
2911 name = NULL;
2912 }
2913
2914 else if (Ustrcmp(name, "macros") == 0)
2915 {
2916 type = US"macro";
2917 name = NULL;
2918 }
2919
2920 else if (Ustrcmp(name, "router_list") == 0)
2921 {
2922 type = US"router";
2923 name = NULL;
2924 names_only = TRUE;
2925 }
2926
2927 else if (Ustrcmp(name, "transport_list") == 0)
2928 {
2929 type = US"transport";
2930 name = NULL;
2931 names_only = TRUE;
2932 }
2933
2934 else if (Ustrcmp(name, "authenticator_list") == 0)
2935 {
2936 type = US"authenticator";
2937 name = NULL;
2938 names_only = TRUE;
2939 }
2940
2941 else if (Ustrcmp(name, "macro_list") == 0)
2942 {
2943 type = US"macro";
2944 name = NULL;
2945 names_only = TRUE;
2946 }
2947
2948 else if (Ustrcmp(name, "environment") == 0)
2949 {
2950 if (environ)
2951 {
2952 uschar ** p;
2953 for (p = USS environ; *p; p++) ;
2954 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2955
2956 for (p = USS environ; *p; p++)
2957 {
2958 uschar * q;
2959 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2960 puts(CS *p);
2961 }
2962 }
2963 return;
2964 }
2965
2966 else
2967 {
2968 print_ol(find_option(name, optionlist_config, nelem(optionlist_config)),
2969 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2970 return;
2971 }
2972 }
2973
2974 /* Handle the options for a router or transport. Skip options that are flagged
2975 as hidden. Some of these are options with names starting with '*', used for
2976 internal alternative representations of other options (which the printing
2977 function will sort out). Others are synonyms kept for backward compatibility.
2978 */
2979
2980 if (Ustrcmp(type, "router") == 0)
2981 {
2982 d = (driver_instance *)routers;
2983 ol2 = optionlist_routers;
2984 size = optionlist_routers_size;
2985 }
2986 else if (Ustrcmp(type, "transport") == 0)
2987 {
2988 d = (driver_instance *)transports;
2989 ol2 = optionlist_transports;
2990 size = optionlist_transports_size;
2991 }
2992 else if (Ustrcmp(type, "authenticator") == 0)
2993 {
2994 d = (driver_instance *)auths;
2995 ol2 = optionlist_auths;
2996 size = optionlist_auths_size;
2997 }
2998
2999 else if (Ustrcmp(type, "macro") == 0)
3000 {
3001 /* People store passwords in macros and they were previously not available
3002 for printing. So we have an admin_users restriction. */
3003 if (!admin_user)
3004 {
3005 fprintf(stderr, "exim: permission denied\n");
3006 exit(EXIT_FAILURE);
3007 }
3008 if (!macros_builtin_created) macros_create_builtin();
3009 for (m = macros; m; m = m->next)
3010 if (!name || Ustrcmp(name, m->name) == 0)
3011 {
3012 if (names_only)
3013 printf("%s\n", CS m->name);
3014 else
3015 printf("%s=%s\n", CS m->name, CS m->replacement);
3016 if (name)
3017 return;
3018 }
3019 if (name)
3020 printf("%s %s not found\n", type, name);
3021 return;
3022 }
3023
3024 if (names_only)
3025 {
3026 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
3027 return;
3028 }
3029
3030 /* Either search for a given driver, or print all of them */
3031
3032 for (; d != NULL; d = d->next)
3033 {
3034 if (name == NULL)
3035 printf("\n%s %s:\n", d->name, type);
3036 else if (Ustrcmp(d->name, name) != 0) continue;
3037
3038 for (ol = ol2; ol < ol2 + size; ol++)
3039 {
3040 if ((ol->type & opt_hidden) == 0)
3041 print_ol(ol, US ol->name, d, ol2, size, no_labels);
3042 }
3043
3044 for (ol = d->info->options;
3045 ol < d->info->options + *(d->info->options_count); ol++)
3046 {
3047 if ((ol->type & opt_hidden) == 0)
3048 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
3049 }
3050 if (name != NULL) return;
3051 }
3052 if (name != NULL) printf("%s %s not found\n", type, name);
3053 }
3054
3055
3056
3057 /*************************************************
3058 * Read a named list item *
3059 *************************************************/
3060
3061 /* This function reads a name and a list (i.e. string). The name is used to
3062 save the list in a tree, sorted by its name. Each entry also has a number,
3063 which can be used for caching tests, but if the string contains any expansion
3064 items other than $key, the number is set negative to inhibit caching. This
3065 mechanism is used for domain, host, and address lists that are referenced by
3066 the "+name" syntax.
3067
3068 Arguments:
3069 anchorp points to the tree anchor
3070 numberp points to the current number for this tree
3071 max the maximum number permitted
3072 s the text of the option line, starting immediately after the name
3073 of the list type
3074 tname the name of the list type, for messages
3075
3076 Returns: nothing
3077 */
3078
3079 static void
3080 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3081 uschar *tname)
3082 {
3083 BOOL forcecache = FALSE;
3084 uschar *ss;
3085 tree_node *t;
3086 namedlist_block *nb = store_get(sizeof(namedlist_block));
3087
3088 if (Ustrncmp(s, "_cache", 6) == 0)
3089 {
3090 forcecache = TRUE;
3091 s += 6;
3092 }
3093
3094 if (!isspace(*s))
3095 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3096
3097 if (*numberp >= max)
3098 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3099 tname, max);
3100
3101 while (isspace(*s)) s++;
3102 ss = s;
3103 while (isalnum(*s) || *s == '_') s++;
3104 t = store_get(sizeof(tree_node) + s-ss);
3105 Ustrncpy(t->name, ss, s-ss);
3106 t->name[s-ss] = 0;
3107 while (isspace(*s)) s++;
3108
3109 if (!tree_insertnode(anchorp, t))
3110 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3111 "duplicate name \"%s\" for a named %s", t->name, tname);
3112
3113 t->data.ptr = nb;
3114 nb->number = *numberp;
3115 *numberp += 1;
3116
3117 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3118 "missing '=' after \"%s\"", t->name);
3119 while (isspace(*s)) s++;
3120 nb->string = read_string(s, t->name);
3121 nb->cache_data = NULL;
3122
3123 /* Check the string for any expansions; if any are found, mark this list
3124 uncacheable unless the user has explicited forced caching. */
3125
3126 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3127 }
3128
3129
3130
3131
3132 /*************************************************
3133 * Unpick data for a rate limit *
3134 *************************************************/
3135
3136 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3137 separate values.
3138
3139 Arguments:
3140 s string, in the form t,b,f,l
3141 where t is the threshold (integer)
3142 b is the initial delay (time)
3143 f is the multiplicative factor (fixed point)
3144 k is the maximum time (time)
3145 threshold where to store threshold
3146 base where to store base in milliseconds
3147 factor where to store factor in milliseconds
3148 limit where to store limit
3149
3150 Returns: nothing (panics on error)
3151 */
3152
3153 static void
3154 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3155 int *limit)
3156 {
3157 uschar bstring[16], lstring[16];
3158
3159 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3160 factor, lstring) == 4)
3161 {
3162 *base = readconf_readtime(bstring, 0, TRUE);
3163 *limit = readconf_readtime(lstring, 0, TRUE);
3164 if (*base >= 0 && *limit >= 0) return;
3165 }
3166 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3167 }
3168
3169
3170
3171
3172 /*************************************************
3173 * Drop privs for checking TLS config *
3174 *************************************************/
3175
3176 /* We want to validate TLS options during readconf, but do not want to be
3177 root when we call into the TLS library, in case of library linkage errors
3178 which cause segfaults; before this check, those were always done as the Exim
3179 runtime user and it makes sense to continue with that.
3180
3181 Assumes: tls_require_ciphers has been set, if it will be
3182 exim_user has been set, if it will be
3183 exim_group has been set, if it will be
3184
3185 Returns: bool for "okay"; false will cause caller to immediately exit.
3186 */
3187
3188 #ifdef SUPPORT_TLS
3189 static BOOL
3190 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3191 {
3192 const uschar *errmsg;
3193 pid_t pid;
3194 int rc, status;
3195 void (*oldsignal)(int);
3196
3197 /* If TLS will never be used, no point checking ciphers */
3198
3199 if ( !tls_advertise_hosts
3200 || !*tls_advertise_hosts
3201 || Ustrcmp(tls_advertise_hosts, ":") == 0
3202 )
3203 return TRUE;
3204 else if (!nowarn && !tls_certificate)
3205 log_write(0, LOG_MAIN,
3206 "Warning: No server certificate defined; will use a selfsigned one.\n"
3207 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3208
3209 oldsignal = signal(SIGCHLD, SIG_DFL);
3210
3211 fflush(NULL);
3212 if ((pid = fork()) < 0)
3213 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3214
3215 if (pid == 0)
3216 {
3217 /* in some modes, will have dropped privilege already */
3218 if (!geteuid())
3219 exim_setugid(exim_uid, exim_gid, FALSE,
3220 US"calling tls_validate_require_cipher");
3221
3222 errmsg = tls_validate_require_cipher();
3223 if (errmsg)
3224 {
3225 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3226 "tls_require_ciphers invalid: %s", errmsg);
3227 }
3228 fflush(NULL);
3229 _exit(0);
3230 }
3231
3232 do {
3233 rc = waitpid(pid, &status, 0);
3234 } while (rc < 0 && errno == EINTR);
3235
3236 DEBUG(D_tls)
3237 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3238 (int)pid, status);
3239
3240 signal(SIGCHLD, oldsignal);
3241
3242 return status == 0;
3243 }
3244 #endif /* SUPPORT_TLS */
3245
3246
3247
3248
3249 /*************************************************
3250 * Read main configuration options *
3251 *************************************************/
3252
3253 /* This function is the first to be called for configuration reading. It
3254 opens the configuration file and reads general configuration settings until
3255 it reaches the end of the configuration section. The file is then left open so
3256 that the remaining configuration data can subsequently be read if needed for
3257 this run of Exim.
3258
3259 The configuration file must be owned either by root or exim, and be writeable
3260 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3261 in the config file, so the test is done on the compiled in values. A slight
3262 anomaly, to be carefully documented.
3263
3264 The name of the configuration file is taken from a list that is included in the
3265 binary of Exim. It can be altered from the command line, but if that is done,
3266 root privilege is immediately withdrawn unless the caller is root or exim.