Multiple headers_add/remove options per router/transport - fixes bug 337
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #define CSTATE_STACK_SIZE 10
15
16
17 /* Structure for chain (stack) of .included files */
18
19 typedef struct config_file_item {
20 struct config_file_item *next;
21 uschar *filename;
22 FILE *file;
23 int lineno;
24 } config_file_item;
25
26 /* Structure of table of conditional words and their state transitions */
27
28 typedef struct cond_item {
29 uschar *name;
30 int namelen;
31 int action1;
32 int action2;
33 int pushpop;
34 } cond_item;
35
36 /* Structure of table of syslog facility names and values */
37
38 typedef struct syslog_fac_item {
39 uschar *name;
40 int value;
41 } syslog_fac_item;
42
43
44 /* Static variables */
45
46 static config_file_item *config_file_stack = NULL; /* For includes */
47
48 static uschar *syslog_facility_str = NULL;
49 static uschar next_section[24];
50 static uschar time_buffer[24];
51
52 /* State variables for conditional loading (.ifdef / .else / .endif) */
53
54 static int cstate = 0;
55 static int cstate_stack_ptr = -1;
56 static int cstate_stack[CSTATE_STACK_SIZE];
57
58 /* Table of state transitions for handling conditional inclusions. There are
59 four possible state transitions:
60
61 .ifdef true
62 .ifdef false
63 .elifdef true (or .else)
64 .elifdef false
65
66 .endif just causes the previous cstate to be popped off the stack */
67
68 static int next_cstate[3][4] =
69 {
70 /* State 0: reading from file, or reading until next .else or .endif */
71 { 0, 1, 2, 2 },
72 /* State 1: condition failed, skipping until next .else or .endif */
73 { 2, 2, 0, 1 },
74 /* State 2: skipping until .endif */
75 { 2, 2, 2, 2 },
76 };
77
78 /* Table of conditionals and the states to set. For each name, there are four
79 values: the length of the name (to save computing it each time), the state to
80 set if a macro was found in the line, the state to set if a macro was not found
81 in the line, and a stack manipulation setting which is:
82
83 -1 pull state value off the stack
84 0 don't alter the stack
85 +1 push value onto stack, before setting new state
86 */
87
88 static cond_item cond_list[] = {
89 { US"ifdef", 5, 0, 1, 1 },
90 { US"ifndef", 6, 1, 0, 1 },
91 { US"elifdef", 7, 2, 3, 0 },
92 { US"elifndef", 8, 3, 2, 0 },
93 { US"else", 4, 2, 2, 0 },
94 { US"endif", 5, 0, 0, -1 }
95 };
96
97 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
98
99 /* Table of syslog facility names and their values */
100
101 static syslog_fac_item syslog_list[] = {
102 { US"mail", LOG_MAIL },
103 { US"user", LOG_USER },
104 { US"news", LOG_NEWS },
105 { US"uucp", LOG_UUCP },
106 { US"local0", LOG_LOCAL0 },
107 { US"local1", LOG_LOCAL1 },
108 { US"local2", LOG_LOCAL2 },
109 { US"local3", LOG_LOCAL3 },
110 { US"local4", LOG_LOCAL4 },
111 { US"local5", LOG_LOCAL5 },
112 { US"local6", LOG_LOCAL6 },
113 { US"local7", LOG_LOCAL7 },
114 { US"daemon", LOG_DAEMON }
115 };
116
117 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
118
119
120
121
122 /*************************************************
123 * Main configuration options *
124 *************************************************/
125
126 /* The list of options that can be set in the main configuration file. This
127 must be in alphabetic order because it is searched by binary chop. */
128
129 static optionlist optionlist_config[] = {
130 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
131 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
132 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
133 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
134 { "accept_8bitmime", opt_bool, &accept_8bitmime },
135 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
136 #ifdef WITH_CONTENT_SCAN
137 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
138 #endif
139 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
140 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
141 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
142 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
143 #ifndef DISABLE_DKIM
144 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
145 #endif
146 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
147 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
148 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
149 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
150 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
151 #ifdef WITH_CONTENT_SCAN
152 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
153 #endif
154 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
155 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
156 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
157 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
158 #ifdef SUPPORT_TLS
159 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
160 #endif
161 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
162 { "admin_groups", opt_gidlist, &admin_groups },
163 { "allow_domain_literals", opt_bool, &allow_domain_literals },
164 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
165 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
166 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
167 { "auto_thaw", opt_time, &auto_thaw },
168 #ifdef WITH_CONTENT_SCAN
169 { "av_scanner", opt_stringptr, &av_scanner },
170 #endif
171 { "bi_command", opt_stringptr, &bi_command },
172 #ifdef EXPERIMENTAL_BRIGHTMAIL
173 { "bmi_config_file", opt_stringptr, &bmi_config_file },
174 #endif
175 { "bounce_message_file", opt_stringptr, &bounce_message_file },
176 { "bounce_message_text", opt_stringptr, &bounce_message_text },
177 { "bounce_return_body", opt_bool, &bounce_return_body },
178 { "bounce_return_message", opt_bool, &bounce_return_message },
179 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
180 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
181 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
182 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
183 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
184 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
185 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
186 { "check_log_inodes", opt_int, &check_log_inodes },
187 { "check_log_space", opt_Kint, &check_log_space },
188 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
189 { "check_spool_inodes", opt_int, &check_spool_inodes },
190 { "check_spool_space", opt_Kint, &check_spool_space },
191 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
192 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
193 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
194 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
195 #ifdef EXPERIMENTAL_DCC
196 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
197 { "dccifd_address", opt_stringptr, &dccifd_address },
198 { "dccifd_options", opt_stringptr, &dccifd_options },
199 #endif
200 { "delay_warning", opt_timelist, &delay_warning },
201 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
202 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
203 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
204 { "delivery_date_remove", opt_bool, &delivery_date_remove },
205 #ifdef ENABLE_DISABLE_FSYNC
206 { "disable_fsync", opt_bool, &disable_fsync },
207 #endif
208 { "disable_ipv6", opt_bool, &disable_ipv6 },
209 #ifndef DISABLE_DKIM
210 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
211 #endif
212 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
213 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
214 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
215 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
216 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
217 { "dns_retrans", opt_time, &dns_retrans },
218 { "dns_retry", opt_int, &dns_retry },
219 { "dns_use_dnssec", opt_int, &dns_use_dnssec },
220 { "dns_use_edns0", opt_int, &dns_use_edns0 },
221 /* This option is now a no-op, retained for compability */
222 { "drop_cr", opt_bool, &drop_cr },
223 /*********************************************************/
224 { "dsn_from", opt_stringptr, &dsn_from },
225 { "envelope_to_remove", opt_bool, &envelope_to_remove },
226 { "errors_copy", opt_stringptr, &errors_copy },
227 { "errors_reply_to", opt_stringptr, &errors_reply_to },
228 { "exim_group", opt_gid, &exim_gid },
229 { "exim_path", opt_stringptr, &exim_path },
230 { "exim_user", opt_uid, &exim_uid },
231 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
232 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
233 { "finduser_retries", opt_int, &finduser_retries },
234 { "freeze_tell", opt_stringptr, &freeze_tell },
235 { "gecos_name", opt_stringptr, &gecos_name },
236 { "gecos_pattern", opt_stringptr, &gecos_pattern },
237 #ifdef SUPPORT_TLS
238 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
239 { "gnutls_enable_pkcs11", opt_bool, &gnutls_enable_pkcs11 },
240 /* These three gnutls_require_* options stopped working in Exim 4.80 */
241 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
242 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
243 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
244 #endif
245 { "header_line_maxsize", opt_int, &header_line_maxsize },
246 { "header_maxsize", opt_int, &header_maxsize },
247 { "headers_charset", opt_stringptr, &headers_charset },
248 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
249 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
250 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
251 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
252 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
253 { "hold_domains", opt_stringptr, &hold_domains },
254 { "host_lookup", opt_stringptr, &host_lookup },
255 { "host_lookup_order", opt_stringptr, &host_lookup_order },
256 { "host_reject_connection", opt_stringptr, &host_reject_connection },
257 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
258 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
259 #ifdef LOOKUP_IBASE
260 { "ibase_servers", opt_stringptr, &ibase_servers },
261 #endif
262 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
263 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
264 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
265 { "keep_malformed", opt_time, &keep_malformed },
266 #ifdef LOOKUP_LDAP
267 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
268 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
269 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
270 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
271 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
272 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
273 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
274 { "ldap_start_tls", opt_bool, &eldap_start_tls },
275 { "ldap_version", opt_int, &eldap_version },
276 #endif
277 { "local_from_check", opt_bool, &local_from_check },
278 { "local_from_prefix", opt_stringptr, &local_from_prefix },
279 { "local_from_suffix", opt_stringptr, &local_from_suffix },
280 { "local_interfaces", opt_stringptr, &local_interfaces },
281 { "local_scan_timeout", opt_time, &local_scan_timeout },
282 { "local_sender_retain", opt_bool, &local_sender_retain },
283 { "localhost_number", opt_stringptr, &host_number_string },
284 { "log_file_path", opt_stringptr, &log_file_path },
285 { "log_selector", opt_stringptr, &log_selector_string },
286 { "log_timezone", opt_bool, &log_timezone },
287 { "lookup_open_max", opt_int, &lookup_open_max },
288 { "max_username_length", opt_int, &max_username_length },
289 { "message_body_newlines", opt_bool, &message_body_newlines },
290 { "message_body_visible", opt_mkint, &message_body_visible },
291 { "message_id_header_domain", opt_stringptr, &message_id_domain },
292 { "message_id_header_text", opt_stringptr, &message_id_text },
293 { "message_logs", opt_bool, &message_logs },
294 { "message_size_limit", opt_stringptr, &message_size_limit },
295 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
296 { "move_frozen_messages", opt_bool, &move_frozen_messages },
297 #endif
298 { "mua_wrapper", opt_bool, &mua_wrapper },
299 #ifdef LOOKUP_MYSQL
300 { "mysql_servers", opt_stringptr, &mysql_servers },
301 #endif
302 { "never_users", opt_uidlist, &never_users },
303 #ifdef SUPPORT_TLS
304 { "openssl_options", opt_stringptr, &openssl_options },
305 #endif
306 #ifdef LOOKUP_ORACLE
307 { "oracle_servers", opt_stringptr, &oracle_servers },
308 #endif
309 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
310 #ifdef EXIM_PERL
311 { "perl_at_start", opt_bool, &opt_perl_at_start },
312 { "perl_startup", opt_stringptr, &opt_perl_startup },
313 #endif
314 #ifdef LOOKUP_PGSQL
315 { "pgsql_servers", opt_stringptr, &pgsql_servers },
316 #endif
317 { "pid_file_path", opt_stringptr, &pid_file_path },
318 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
319 { "preserve_message_logs", opt_bool, &preserve_message_logs },
320 { "primary_hostname", opt_stringptr, &primary_hostname },
321 { "print_topbitchars", opt_bool, &print_topbitchars },
322 { "process_log_path", opt_stringptr, &process_log_path },
323 { "prod_requires_admin", opt_bool, &prod_requires_admin },
324 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
325 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
326 { "queue_domains", opt_stringptr, &queue_domains },
327 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
328 { "queue_only", opt_bool, &queue_only },
329 { "queue_only_file", opt_stringptr, &queue_only_file },
330 { "queue_only_load", opt_fixed, &queue_only_load },
331 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
332 { "queue_only_override", opt_bool, &queue_only_override },
333 { "queue_run_in_order", opt_bool, &queue_run_in_order },
334 { "queue_run_max", opt_int, &queue_run_max },
335 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
336 { "receive_timeout", opt_time, &receive_timeout },
337 { "received_header_text", opt_stringptr, &received_header_text },
338 { "received_headers_max", opt_int, &received_headers_max },
339 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
340 { "recipients_max", opt_int, &recipients_max },
341 { "recipients_max_reject", opt_bool, &recipients_max_reject },
342 { "remote_max_parallel", opt_int, &remote_max_parallel },
343 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
344 { "retry_data_expire", opt_time, &retry_data_expire },
345 { "retry_interval_max", opt_time, &retry_interval_max },
346 { "return_path_remove", opt_bool, &return_path_remove },
347 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
348 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
349 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
350 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
351 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
352 { "smtp_accept_max", opt_int, &smtp_accept_max },
353 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
354 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
355 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
356 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
357 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
358 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
359 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
360 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
361 { "smtp_banner", opt_stringptr, &smtp_banner },
362 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
363 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
364 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
365 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
366 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
367 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
368 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
369 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
370 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
371 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
372 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
373 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
374 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
375 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
376 #ifdef WITH_CONTENT_SCAN
377 { "spamd_address", opt_stringptr, &spamd_address },
378 #endif
379 #ifdef EXPERIMENTAL_SPF
380 { "spf_guess", opt_stringptr, &spf_guess },
381 #endif
382 { "split_spool_directory", opt_bool, &split_spool_directory },
383 { "spool_directory", opt_stringptr, &spool_directory },
384 #ifdef LOOKUP_SQLITE
385 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
386 #endif
387 #ifdef EXPERIMENTAL_SRS
388 { "srs_config", opt_stringptr, &srs_config },
389 { "srs_hashlength", opt_int, &srs_hashlength },
390 { "srs_hashmin", opt_int, &srs_hashmin },
391 { "srs_maxage", opt_int, &srs_maxage },
392 { "srs_secrets", opt_stringptr, &srs_secrets },
393 { "srs_usehash", opt_bool, &srs_usehash },
394 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
395 #endif
396 { "strict_acl_vars", opt_bool, &strict_acl_vars },
397 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
398 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
399 { "syslog_duplication", opt_bool, &syslog_duplication },
400 { "syslog_facility", opt_stringptr, &syslog_facility_str },
401 { "syslog_processname", opt_stringptr, &syslog_processname },
402 { "syslog_timestamp", opt_bool, &syslog_timestamp },
403 { "system_filter", opt_stringptr, &system_filter },
404 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
405 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
406 { "system_filter_group", opt_gid, &system_filter_gid },
407 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
408 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
409 { "system_filter_user", opt_uid, &system_filter_uid },
410 { "tcp_nodelay", opt_bool, &tcp_nodelay },
411 #ifdef USE_TCP_WRAPPERS
412 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
413 #endif
414 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
415 { "timezone", opt_stringptr, &timezone_string },
416 #ifdef SUPPORT_TLS
417 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
418 { "tls_certificate", opt_stringptr, &tls_certificate },
419 { "tls_crl", opt_stringptr, &tls_crl },
420 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
421 { "tls_dhparam", opt_stringptr, &tls_dhparam },
422 # if defined(EXPERIMENTAL_OCSP) && !defined(USE_GNUTLS)
423 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
424 # endif
425 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
426 { "tls_privatekey", opt_stringptr, &tls_privatekey },
427 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
428 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
429 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
430 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
431 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
432 #endif
433 { "trusted_groups", opt_gidlist, &trusted_groups },
434 { "trusted_users", opt_uidlist, &trusted_users },
435 { "unknown_login", opt_stringptr, &unknown_login },
436 { "unknown_username", opt_stringptr, &unknown_username },
437 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
438 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
439 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
440 { "warn_message_file", opt_stringptr, &warn_message_file },
441 { "write_rejectlog", opt_bool, &write_rejectlog }
442 };
443
444 static int optionlist_config_size =
445 sizeof(optionlist_config)/sizeof(optionlist);
446
447
448
449 /*************************************************
450 * Find the name of an option *
451 *************************************************/
452
453 /* This function is to aid debugging. Various functions take arguments that are
454 pointer variables in the options table or in option tables for various drivers.
455 For debugging output, it is useful to be able to find the name of the option
456 which is currently being processed. This function finds it, if it exists, by
457 searching the table(s).
458
459 Arguments: a value that is presumed to be in the table above
460 Returns: the option name, or an empty string
461 */
462
463 uschar *
464 readconf_find_option(void *p)
465 {
466 int i;
467 router_instance *r;
468 transport_instance *t;
469
470 for (i = 0; i < optionlist_config_size; i++)
471 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
472
473 for (r = routers; r != NULL; r = r->next)
474 {
475 router_info *ri = r->info;
476 for (i = 0; i < ri->options_count[0]; i++)
477 {
478 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
479 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
480 return US ri->options[i].name;
481 }
482 }
483
484 for (t = transports; t != NULL; t = t->next)
485 {
486 transport_info *ti = t->info;
487 for (i = 0; i < ti->options_count[0]; i++)
488 {
489 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
490 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
491 return US ti->options[i].name;
492 }
493 }
494
495 return US"";
496 }
497
498
499
500
501 /*************************************************
502 * Deal with an assignment to a macro *
503 *************************************************/
504
505 /* This function is called when a line that starts with an upper case letter is
506 encountered. The argument "line" should contain a complete logical line, and
507 start with the first letter of the macro name. The macro name and the
508 replacement text are extracted and stored. Redefinition of existing,
509 non-command line, macros is permitted using '==' instead of '='.
510
511 Arguments:
512 s points to the start of the logical line
513
514 Returns: nothing
515 */
516
517 static void
518 read_macro_assignment(uschar *s)
519 {
520 uschar name[64];
521 int namelen = 0;
522 BOOL redef = FALSE;
523 macro_item *m;
524 macro_item *mlast = NULL;
525
526 while (isalnum(*s) || *s == '_')
527 {
528 if (namelen >= sizeof(name) - 1)
529 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
530 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
531 name[namelen++] = *s++;
532 }
533 name[namelen] = 0;
534
535 while (isspace(*s)) s++;
536 if (*s++ != '=')
537 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
538
539 if (*s == '=')
540 {
541 redef = TRUE;
542 s++;
543 }
544 while (isspace(*s)) s++;
545
546 /* If an existing macro of the same name was defined on the command line, we
547 just skip this definition. It's an error to attempt to redefine a macro without
548 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
549 It is also an error to define a macro whose name begins with the name of a
550 previously defined macro. Note: it is documented that the other way round
551 works. */
552
553 for (m = macros; m != NULL; m = m->next)
554 {
555 int len = Ustrlen(m->name);
556
557 if (Ustrcmp(m->name, name) == 0)
558 {
559 if (!m->command_line && !redef)
560 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
561 "defined (use \"==\" if you want to redefine it", name);
562 break;
563 }
564
565 if (len < namelen && Ustrstr(name, m->name) != NULL)
566 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
567 "a macro because previously defined macro \"%s\" is a substring",
568 name, m->name);
569
570 /* We cannot have this test, because it is documented that a substring
571 macro is permitted (there is even an example).
572 *
573 * if (len > namelen && Ustrstr(m->name, name) != NULL)
574 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
575 * "a macro because it is a substring of previously defined macro \"%s\"",
576 * name, m->name);
577 */
578
579 mlast = m;
580 }
581
582 /* Check for an overriding command-line definition. */
583
584 if (m != NULL && m->command_line) return;
585
586 /* Redefinition must refer to an existing macro. */
587
588 if (redef)
589 {
590 if (m == NULL)
591 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
592 "\"%s\"", name);
593 }
594
595 /* We have a new definition. The macro_item structure includes a final vector
596 called "name" which is one byte long. Thus, adding "namelen" gives us enough
597 room to store the "name" string. */
598
599 else
600 {
601 m = store_get(sizeof(macro_item) + namelen);
602 if (macros == NULL) macros = m; else mlast->next = m;
603 Ustrncpy(m->name, name, namelen);
604 m->name[namelen] = 0;
605 m->next = NULL;
606 m->command_line = FALSE;
607 }
608
609 /* Set the value of the new or redefined macro */
610
611 m->replacement = string_copy(s);
612 }
613
614
615
616
617
618 /*************************************************
619 * Read configuration line *
620 *************************************************/
621
622 /* A logical line of text is read from the configuration file into the big
623 buffer, taking account of macros, .includes, and continuations. The size of
624 big_buffer is increased if necessary. The count of configuration lines is
625 maintained. Physical input lines starting with # (ignoring leading white space,
626 and after macro replacement) and empty logical lines are always ignored.
627 Leading and trailing spaces are removed.
628
629 If we hit a line of the form "begin xxxx", the xxxx is placed in the
630 next_section vector, and the function returns NULL, indicating the end of a
631 configuration section. On end-of-file, NULL is returned with next_section
632 empty.
633
634 Arguments: none
635
636 Returns: a pointer to the first non-blank in the line,
637 or NULL if eof or end of section is reached
638 */
639
640 static uschar *
641 get_config_line(void)
642 {
643 int startoffset = 0; /* To first non-blank char in logical line */
644 int len = 0; /* Of logical line so far */
645 int newlen;
646 uschar *s, *ss;
647 macro_item *m;
648 BOOL macro_found;
649
650 /* Loop for handling continuation lines, skipping comments, and dealing with
651 .include files. */
652
653 for (;;)
654 {
655 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
656 {
657 if (config_file_stack != NULL) /* EOF inside .include */
658 {
659 (void)fclose(config_file);
660 config_file = config_file_stack->file;
661 config_filename = config_file_stack->filename;
662 config_lineno = config_file_stack->lineno;
663 config_file_stack = config_file_stack->next;
664 continue;
665 }
666
667 /* EOF at top level */
668
669 if (cstate_stack_ptr >= 0)
670 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
671 "Unexpected end of configuration file: .endif missing");
672
673 if (len != 0) break; /* EOF after continuation */
674 next_section[0] = 0; /* EOF at start of logical line */
675 return NULL;
676 }
677
678 config_lineno++;
679 newlen = len + Ustrlen(big_buffer + len);
680
681 /* Handle pathologically long physical lines - yes, it did happen - by
682 extending big_buffer at this point. The code also copes with very long
683 logical lines. */
684
685 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
686 {
687 uschar *newbuffer;
688 big_buffer_size += BIG_BUFFER_SIZE;
689 newbuffer = store_malloc(big_buffer_size);
690
691 /* This use of strcpy is OK because we know that the string in the old
692 buffer is shorter than the new buffer. */
693
694 Ustrcpy(newbuffer, big_buffer);
695 store_free(big_buffer);
696 big_buffer = newbuffer;
697 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
698 break;
699 newlen += Ustrlen(big_buffer + newlen);
700 }
701
702 /* Find the true start of the physical line - leading spaces are always
703 ignored. */
704
705 ss = big_buffer + len;
706 while (isspace(*ss)) ss++;
707
708 /* Process the physical line for macros. If this is the start of the logical
709 line, skip over initial text at the start of the line if it starts with an
710 upper case character followed by a sequence of name characters and an equals
711 sign, because that is the definition of a new macro, and we don't do
712 replacement therein. */
713
714 s = ss;
715 if (len == 0 && isupper(*s))
716 {
717 while (isalnum(*s) || *s == '_') s++;
718 while (isspace(*s)) s++;
719 if (*s != '=') s = ss; /* Not a macro definition */
720 }
721
722 /* For each defined macro, scan the line (from after XXX= if present),
723 replacing all occurrences of the macro. */
724
725 macro_found = FALSE;
726 for (m = macros; m != NULL; m = m->next)
727 {
728 uschar *p, *pp;
729 uschar *t = s;
730
731 while ((p = Ustrstr(t, m->name)) != NULL)
732 {
733 int moveby;
734 int namelen = Ustrlen(m->name);
735 int replen = Ustrlen(m->replacement);
736
737 /* Expand the buffer if necessary */
738
739 while (newlen - namelen + replen + 1 > big_buffer_size)
740 {
741 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
742 uschar *newbuffer = store_malloc(newsize);
743 memcpy(newbuffer, big_buffer, newlen + 1);
744 p = newbuffer + (p - big_buffer);
745 s = newbuffer + (s - big_buffer);
746 ss = newbuffer + (ss - big_buffer);
747 t = newbuffer + (t - big_buffer);
748 big_buffer_size = newsize;
749 store_free(big_buffer);
750 big_buffer = newbuffer;
751 }
752
753 /* Shuffle the remaining characters up or down in the buffer before
754 copying in the replacement text. Don't rescan the replacement for this
755 same macro. */
756
757 pp = p + namelen;
758 moveby = replen - namelen;
759 if (moveby != 0)
760 {
761 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
762 newlen += moveby;
763 }
764 Ustrncpy(p, m->replacement, replen);
765 t = p + replen;
766 macro_found = TRUE;
767 }
768 }
769
770 /* An empty macro replacement at the start of a line could mean that ss no
771 longer points to the first non-blank character. */
772
773 while (isspace(*ss)) ss++;
774
775 /* Check for comment lines - these are physical lines. */
776
777 if (*ss == '#') continue;
778
779 /* Handle conditionals, which are also applied to physical lines. Conditions
780 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
781 expansion occured on the rest of the line. A preliminary test for the leading
782 '.' saves effort on most lines. */
783
784 if (*ss == '.')
785 {
786 int i;
787
788 /* Search the list of conditional directives */
789
790 for (i = 0; i < cond_list_size; i++)
791 {
792 int n;
793 cond_item *c = cond_list+i;
794 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
795
796 /* The following character must be white space or end of string */
797
798 n = ss[1 + c->namelen];
799 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
800
801 /* .ifdef and .ifndef push the current state onto the stack, then set
802 a new one from the table. Stack overflow is an error */
803
804 if (c->pushpop > 0)
805 {
806 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
807 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
808 ".%s nested too deeply", c->name);
809 cstate_stack[++cstate_stack_ptr] = cstate;
810 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
811 }
812
813 /* For any of the others, stack underflow is an error. The next state
814 comes either from the stack (.endif) or from the table. */
815
816 else
817 {
818 if (cstate_stack_ptr < 0)
819 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
820 ".%s without matching .ifdef", c->name);
821 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
822 next_cstate[cstate][macro_found? c->action1 : c->action2];
823 }
824
825 /* Having dealt with a directive, break the loop */
826
827 break;
828 }
829
830 /* If we have handled a conditional directive, continue with the next
831 physical line. Otherwise, fall through. */
832
833 if (i < cond_list_size) continue;
834 }
835
836 /* If the conditional state is not 0 (actively using these lines), ignore
837 this input line. */
838
839 if (cstate != 0) continue; /* Conditional skip */
840
841 /* Handle .include lines - these are also physical lines. */
842
843 if (Ustrncmp(ss, ".include", 8) == 0 &&
844 (isspace(ss[8]) ||
845 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
846 {
847 uschar *t;
848 int include_if_exists = isspace(ss[8])? 0 : 10;
849 config_file_item *save;
850 struct stat statbuf;
851
852 ss += 9 + include_if_exists;
853 while (isspace(*ss)) ss++;
854 t = ss + Ustrlen(ss);
855 while (t > ss && isspace(t[-1])) t--;
856 if (*ss == '\"' && t[-1] == '\"')
857 {
858 ss++;
859 t--;
860 }
861 *t = 0;
862
863 if (*ss != '/')
864 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
865 "absolute path \"%s\"", ss);
866
867 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
868
869 save = store_get(sizeof(config_file_item));
870 save->next = config_file_stack;
871 config_file_stack = save;
872 save->file = config_file;
873 save->filename = config_filename;
874 save->lineno = config_lineno;
875
876 config_file = Ufopen(ss, "rb");
877 if (config_file == NULL)
878 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
879 "configuration file %s", ss);
880 config_filename = string_copy(ss);
881 config_lineno = 0;
882 continue;
883 }
884
885 /* If this is the start of the logical line, remember where the non-blank
886 data starts. Otherwise shuffle down continuation lines to remove leading
887 white space. */
888
889 if (len == 0)
890 startoffset = ss - big_buffer;
891 else
892 {
893 s = big_buffer + len;
894 if (ss > s)
895 {
896 memmove(s, ss, (newlen - len) - (ss - s) + 1);
897 newlen -= ss - s;
898 }
899 }
900
901 /* Accept the new addition to the line. Remove trailing white space. */
902
903 len = newlen;
904 while (len > 0 && isspace(big_buffer[len-1])) len--;
905 big_buffer[len] = 0;
906
907 /* We are done if the line does not end in backslash and contains some data.
908 Empty logical lines are ignored. For continuations, remove the backslash and
909 go round the loop to read the continuation line. */
910
911 if (len > 0)
912 {
913 if (big_buffer[len-1] != '\\') break; /* End of logical line */
914 big_buffer[--len] = 0; /* Remove backslash */
915 }
916 } /* Loop for reading multiple physical lines */
917
918 /* We now have a logical line. Test for the end of a configuration section (or,
919 more accurately, for the start of the next section). Place the name of the next
920 section in next_section, and return NULL. If the name given is longer than
921 next_section, truncate it. It will be unrecognized later, because all the known
922 section names do fit. Leave space for pluralizing. */
923
924 s = big_buffer + startoffset; /* First non-space character */
925 if (strncmpic(s, US"begin ", 6) == 0)
926 {
927 s += 6;
928 while (isspace(*s)) s++;
929 if (big_buffer + len - s > sizeof(next_section) - 2)
930 s[sizeof(next_section) - 2] = 0;
931 Ustrcpy(next_section, s);
932 return NULL;
933 }
934
935 /* Return the first non-blank character. */
936
937 return s;
938 }
939
940
941
942 /*************************************************
943 * Read a name *
944 *************************************************/
945
946 /* The yield is the pointer to the next uschar. Names longer than the
947 output space are silently truncated. This function is also used from acl.c when
948 parsing ACLs.
949
950 Arguments:
951 name where to put the name
952 len length of name
953 s input pointer
954
955 Returns: new input pointer
956 */
957
958 uschar *
959 readconf_readname(uschar *name, int len, uschar *s)
960 {
961 int p = 0;
962 while (isspace(*s)) s++;
963 if (isalpha(*s))
964 {
965 while (isalnum(*s) || *s == '_')
966 {
967 if (p < len-1) name[p++] = *s;
968 s++;
969 }
970 }
971 name[p] = 0;
972 while (isspace(*s)) s++;
973 return s;
974 }
975
976
977
978
979 /*************************************************
980 * Read a time value *
981 *************************************************/
982
983 /* This function is also called from outside, to read argument
984 time values. The format of a time value is:
985
986 [<n>w][<n>d][<n>h][<n>m][<n>s]
987
988 as long as at least one is present. If a format error is encountered,
989 return a negative value. The value must be terminated by the given
990 terminator.
991
992 Arguments:
993 s input pointer
994 terminator required terminating character
995 return_msec if TRUE, allow fractional seconds and return milliseconds
996
997 Returns: the time value, or -1 on syntax error
998 value is seconds if return_msec is FALSE
999 value is milliseconds if return_msec is TRUE
1000 */
1001
1002 int
1003 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
1004 {
1005 int yield = 0;
1006 for (;;)
1007 {
1008 int value, count;
1009 double fraction;
1010
1011 if (!isdigit(*s)) return -1;
1012 (void)sscanf(CS s, "%d%n", &value, &count);
1013 s += count;
1014
1015 switch (*s)
1016 {
1017 case 'w': value *= 7;
1018 case 'd': value *= 24;
1019 case 'h': value *= 60;
1020 case 'm': value *= 60;
1021 case 's': s++;
1022 break;
1023
1024 case '.':
1025 if (!return_msec) return -1;
1026 (void)sscanf(CS s, "%lf%n", &fraction, &count);
1027 s += count;
1028 if (*s++ != 's') return -1;
1029 yield += (int)(fraction * 1000.0);
1030 break;
1031
1032 default: return -1;
1033 }
1034
1035 if (return_msec) value *= 1000;
1036 yield += value;
1037 if (*s == terminator) return yield;
1038 }
1039 /* Control never reaches here. */
1040 }
1041
1042
1043
1044 /*************************************************
1045 * Read a fixed point value *
1046 *************************************************/
1047
1048 /* The value is returned *1000
1049
1050 Arguments:
1051 s input pointer
1052 terminator required terminator
1053
1054 Returns: the value, or -1 on error
1055 */
1056
1057 static int
1058 readconf_readfixed(uschar *s, int terminator)
1059 {
1060 int yield = 0;
1061 int value, count;
1062 if (!isdigit(*s)) return -1;
1063 (void)sscanf(CS s, "%d%n", &value, &count);
1064 s += count;
1065 yield = value * 1000;
1066 if (*s == '.')
1067 {
1068 int m = 100;
1069 while (isdigit((*(++s))))
1070 {
1071 yield += (*s - '0') * m;
1072 m /= 10;
1073 }
1074 }
1075
1076 return (*s == terminator)? yield : (-1);
1077 }
1078
1079
1080
1081 /*************************************************
1082 * Find option in list *
1083 *************************************************/
1084
1085 /* The lists are always in order, so binary chop can be used.
1086
1087 Arguments:
1088 name the option name to search for
1089 ol the first entry in the option list
1090 last one more than the offset of the last entry in the option list
1091
1092 Returns: pointer to an option entry, or NULL if not found
1093 */
1094
1095 static optionlist *
1096 find_option(uschar *name, optionlist *ol, int last)
1097 {
1098 int first = 0;
1099 while (last > first)
1100 {
1101 int middle = (first + last)/2;
1102 int c = Ustrcmp(name, ol[middle].name);
1103 if (c == 0) return ol + middle;
1104 else if (c > 0) first = middle + 1;
1105 else last = middle;
1106 }
1107 return NULL;
1108 }
1109
1110
1111
1112 /*************************************************
1113 * Find a set flag in option list *
1114 *************************************************/
1115
1116 /* Because some versions of Unix make no restrictions on the values of uids and
1117 gids (even negative ones), we cannot represent "unset" by a special value.
1118 There is therefore a separate boolean variable for each one indicating whether
1119 a value is set or not. This function returns a pointer to the boolean, given
1120 the original option name. It is a major disaster if the flag cannot be found.
1121
1122 Arguments:
1123 name the name of the uid or gid option
1124 oltop points to the start of the relevant option list
1125 last one more than the offset of the last item in the option list
1126 data_block NULL when reading main options => data values in the option
1127 list are absolute addresses; otherwise they are byte offsets
1128 in data_block (used for driver options)
1129
1130 Returns: a pointer to the boolean flag.
1131 */
1132
1133 static BOOL *
1134 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1135 {
1136 optionlist *ol;
1137 uschar name2[64];
1138 sprintf(CS name2, "*set_%.50s", name);
1139 ol = find_option(name2, oltop, last);
1140 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1141 "Exim internal error: missing set flag for %s", name);
1142 return (data_block == NULL)? (BOOL *)(ol->value) :
1143 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1144 }
1145
1146
1147
1148
1149 /*************************************************
1150 * Output extra characters message and die *
1151 *************************************************/
1152
1153 /* Called when an option line has junk on the end. Sometimes this is because
1154 the sysadmin thinks comments are permitted.
1155
1156 Arguments:
1157 s points to the extra characters
1158 t1..t3 strings to insert in the log message
1159
1160 Returns: doesn't return; dies
1161 */
1162
1163 static void
1164 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
1165 {
1166 uschar *comment = US"";
1167 if (*s == '#') comment = US" (# is comment only at line start)";
1168 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1169 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1170 }
1171
1172
1173
1174 /*************************************************
1175 * Read rewrite information *
1176 *************************************************/
1177
1178 /* Each line of rewrite information contains:
1179
1180 . A complete address in the form user@domain, possibly with
1181 leading * for each part; or alternatively, a regex.
1182
1183 . A replacement string (which will be expanded).
1184
1185 . An optional sequence of one-letter flags, indicating which
1186 headers etc. to apply this rule to.
1187
1188 All this is decoded and placed into a control block. The OR of the flags is
1189 maintained in a common word.
1190
1191 Arguments:
1192 p points to the string that makes up the rule
1193 existflags points to the overall flag word
1194 isglobal TRUE if reading global rewrite rules
1195
1196 Returns: the control block for the parsed rule.
1197 */
1198
1199 static rewrite_rule *
1200 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1201 {
1202 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1203
1204 next->next = NULL;
1205 next->key = string_dequote(&p);
1206
1207 while (isspace(*p)) p++;
1208 if (*p == 0)
1209 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1210 "missing rewrite replacement string");
1211
1212 next->flags = 0;
1213 next->replacement = string_dequote(&p);
1214
1215 while (*p != 0) switch (*p++)
1216 {
1217 case ' ': case '\t': break;
1218
1219 case 'q': next->flags |= rewrite_quit; break;
1220 case 'w': next->flags |= rewrite_whole; break;
1221
1222 case 'h': next->flags |= rewrite_all_headers; break;
1223 case 's': next->flags |= rewrite_sender; break;
1224 case 'f': next->flags |= rewrite_from; break;
1225 case 't': next->flags |= rewrite_to; break;
1226 case 'c': next->flags |= rewrite_cc; break;
1227 case 'b': next->flags |= rewrite_bcc; break;
1228 case 'r': next->flags |= rewrite_replyto; break;
1229
1230 case 'E': next->flags |= rewrite_all_envelope; break;
1231 case 'F': next->flags |= rewrite_envfrom; break;
1232 case 'T': next->flags |= rewrite_envto; break;
1233
1234 case 'Q': next->flags |= rewrite_qualify; break;
1235 case 'R': next->flags |= rewrite_repeat; break;
1236
1237 case 'S':
1238 next->flags |= rewrite_smtp;
1239 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1240 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1241 "rewrite rule has the S flag but is not a regular expression");
1242 break;
1243
1244 default:
1245 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1246 "unknown rewrite flag character '%c' "
1247 "(could be missing quotes round replacement item)", p[-1]);
1248 break;
1249 }
1250
1251 /* If no action flags are set, set all the "normal" rewrites. */
1252
1253 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1254 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1255
1256 /* Remember which exist, for optimization, and return the rule */
1257
1258 *existflags |= next->flags;
1259 return next;
1260 }
1261
1262
1263
1264
1265 /*************************************************
1266 * Read global rewrite information *
1267 *************************************************/
1268
1269 /* Each line is a single rewrite rule; it is parsed into a control block
1270 by readconf_one_rewrite(), and its flags are ORed into the global flag
1271 word rewrite_existflags. */
1272
1273 void
1274 readconf_rewrites(void)
1275 {
1276 rewrite_rule **chain = &global_rewrite_rules;
1277 uschar *p;
1278
1279 while ((p = get_config_line()) != NULL)
1280 {
1281 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1282 *chain = next;
1283 chain = &(next->next);
1284 }
1285 }
1286
1287
1288
1289 /*************************************************
1290 * Read a string *
1291 *************************************************/
1292
1293 /* Strings are read into the normal store pool. As long we aren't too
1294 near the end of the current block, the string will just use what is necessary
1295 on the top of the stacking pool, because string_cat() uses the extension
1296 mechanism.
1297
1298 Argument:
1299 s the rest of the input line
1300 name the option name (for errors)
1301
1302 Returns: pointer to the string
1303 */
1304
1305 static uschar *
1306 read_string(uschar *s, uschar *name)
1307 {
1308 uschar *yield;
1309 uschar *ss;
1310
1311 if (*s != '\"') return string_copy(s);
1312
1313 ss = s;
1314 yield = string_dequote(&s);
1315
1316 if (s == ss+1 || s[-1] != '\"')
1317 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1318 "missing quote at end of string value for %s", name);
1319
1320 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1321
1322 return yield;
1323 }
1324
1325
1326 /*************************************************
1327 * Handle option line *
1328 *************************************************/
1329
1330 /* This function is called from several places to process a line containing the
1331 setting of an option. The first argument is the line to be decoded; it has been
1332 checked not to be empty and not to start with '#'. Trailing newlines and white
1333 space have been removed. The second argument is a pointer to the list of
1334 variable names that are to be recognized, together with their types and
1335 locations, and the third argument gives the number of entries in the list.
1336
1337 The fourth argument is a pointer to a data block. If it is NULL, then the data
1338 values in the options list are absolute addresses. Otherwise, they are byte
1339 offsets in the data block.
1340
1341 String option data may continue onto several lines; this function reads further
1342 data from config_file if necessary.
1343
1344 The yield of this function is normally zero. If a string continues onto
1345 multiple lines, then the data value is permitted to be followed by a comma
1346 or a semicolon (for use in drivers) and the yield is that character.
1347
1348 Arguments:
1349 buffer contains the configuration line to be handled
1350 oltop points to the start of the relevant option list
1351 last one more than the offset of the last item in the option list
1352 data_block NULL when reading main options => data values in the option
1353 list are absolute addresses; otherwise they are byte offsets
1354 in data_block when they have opt_public set; otherwise
1355 they are byte offsets in data_block->options_block.
1356 unknown_txt format string to use in panic message for unknown option;
1357 must contain %s for option name
1358 if given as NULL, don't panic on unknown option
1359
1360 Returns: TRUE if an option was read successfully,
1361 FALSE false for an unknown option if unknown_txt == NULL,
1362 otherwise panic and die on an unknown option
1363 */
1364
1365 static BOOL
1366 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1367 void *data_block, uschar *unknown_txt)
1368 {
1369 int ptr = 0;
1370 int offset = 0;
1371 int n, count, type, value;
1372 int issecure = 0;
1373 uid_t uid;
1374 gid_t gid;
1375 BOOL boolvalue = TRUE;
1376 BOOL freesptr = TRUE;
1377 optionlist *ol, *ol2;
1378 struct passwd *pw;
1379 void *reset_point;
1380 int intbase = 0;
1381 uschar *inttype = US"";
1382 uschar *sptr;
1383 uschar *s = buffer;
1384 uschar *saved_condition, *strtemp;
1385 uschar **str_target;
1386 uschar name[64];
1387 uschar name2[64];
1388
1389 /* There may be leading spaces; thereafter, we expect an option name starting
1390 with a letter. */
1391
1392 while (isspace(*s)) s++;
1393 if (!isalpha(*s))
1394 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1395
1396 /* Read the name of the option, and skip any subsequent white space. If
1397 it turns out that what we read was "hide", set the flag indicating that
1398 this is a secure option, and loop to read the next word. */
1399
1400 for (n = 0; n < 2; n++)
1401 {
1402 while (isalnum(*s) || *s == '_')
1403 {
1404 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1405 s++;
1406 }
1407 name[ptr] = 0;
1408 while (isspace(*s)) s++;
1409 if (Ustrcmp(name, "hide") != 0) break;
1410 issecure = opt_secure;
1411 ptr = 0;
1412 }
1413
1414 /* Deal with "no_" or "not_" here for booleans */
1415
1416 if (Ustrncmp(name, "no_", 3) == 0)
1417 {
1418 boolvalue = FALSE;
1419 offset = 3;
1420 }
1421
1422 if (Ustrncmp(name, "not_", 4) == 0)
1423 {
1424 boolvalue = FALSE;
1425 offset = 4;
1426 }
1427
1428 /* Search the list for the given name. A non-existent name, or an option that
1429 is set twice, is a disaster. */
1430
1431 ol = find_option(name + offset, oltop, last);
1432
1433 if (ol == NULL)
1434 {
1435 if (unknown_txt == NULL) return FALSE;
1436 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1437 }
1438
1439 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1440 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1441 "\"%s\" option set for the second time", name);
1442
1443 ol->type |= opt_set | issecure;
1444 type = ol->type & opt_mask;
1445
1446 /* Types with data values must be followed by '='; the "no[t]_" prefix
1447 applies only to boolean values. */
1448
1449 if (type < opt_bool || type > opt_bool_last)
1450 {
1451 if (offset != 0)
1452 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1453 "negation prefix applied to a non-boolean option");
1454 if (*s == 0)
1455 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1456 "unexpected end of line (data missing) after %s", name);
1457 if (*s != '=')
1458 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1459 }
1460
1461 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1462 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1463 ultimately expands to one of those values. */
1464
1465 else if (*s != 0 && (offset != 0 || *s != '='))
1466 extra_chars_error(s, US"boolean option ", name, US"");
1467
1468 /* Skip white space after = */
1469
1470 if (*s == '=') while (isspace((*(++s))));
1471
1472 /* If there is a data block and the opt_public flag is not set, change
1473 the data block pointer to the private options block. */
1474
1475 if (data_block != NULL && (ol->type & opt_public) == 0)
1476 data_block = (void *)(((driver_instance *)data_block)->options_block);
1477
1478 /* Now get the data according to the type. */
1479
1480 switch (type)
1481 {
1482 /* If a string value is not enclosed in quotes, it consists of
1483 the rest of the current line, verbatim. Otherwise, string escapes
1484 are processed.
1485
1486 A transport is specified as a string, which is then looked up in the
1487 list of transports. A search type is specified as one of a number of
1488 known strings.
1489
1490 A set or rewrite rules for a driver is specified as a string, which is
1491 then parsed into a suitable chain of control blocks.
1492
1493 Uids and gids are specified as strings which are then looked up in the
1494 passwd file. Lists of uids and gids are similarly specified as colon-
1495 separated strings. */
1496
1497 case opt_stringptr:
1498 case opt_uid:
1499 case opt_gid:
1500 case opt_expand_uid:
1501 case opt_expand_gid:
1502 case opt_uidlist:
1503 case opt_gidlist:
1504 case opt_rewrite:
1505
1506 reset_point = sptr = read_string(s, name);
1507
1508 /* Having read a string, we now have several different ways of using it,
1509 depending on the data type, so do another switch. If keeping the actual
1510 string is not required (because it is interpreted), freesptr is set TRUE,
1511 and at the end we reset the pool. */
1512
1513 switch (type)
1514 {
1515 /* If this was a string, set the variable to point to the new string,
1516 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1517 rules, we still keep the string (for printing), and parse the rules into a
1518 control block and flags word. */
1519
1520 case opt_stringptr:
1521 if (data_block == NULL)
1522 str_target = (uschar **)(ol->value);
1523 else
1524 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1525 if (ol->type & opt_rep_con)
1526 {
1527 /* We already have a condition, we're conducting a crude hack to let
1528 multiple condition rules be chained together, despite storing them in
1529 text form. */
1530 saved_condition = *str_target;
1531 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1532 saved_condition, sptr);
1533 *str_target = string_copy_malloc(strtemp);
1534 /* TODO(pdp): there is a memory leak here and just below
1535 when we set 3 or more conditions; I still don't
1536 understand the store mechanism enough to know
1537 what's the safe way to free content from an earlier store.
1538 AFAICT, stores stack, so freeing an early stored item also stores
1539 all data alloc'd after it. If we knew conditions were adjacent,
1540 we could survive that, but we don't. So I *think* we need to take
1541 another bit from opt_type to indicate "malloced"; this seems like
1542 quite a hack, especially for this one case. It also means that
1543 we can't ever reclaim the store from the *first* condition.
1544
1545 Because we only do this once, near process start-up, I'm prepared to
1546 let this slide for the time being, even though it rankles. */
1547 }
1548 else if (*str_target && (ol->type & opt_rep_str))
1549 {
1550 uschar sep = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1551 saved_condition = *str_target;
1552 strtemp = saved_condition + strlen(saved_condition)-1;
1553 if (*strtemp == sep) *strtemp = 0; /* eliminate trailing list-sep */
1554 strtemp = string_sprintf("%s%c%s", saved_condition, sep, sptr);
1555 *str_target = string_copy_malloc(strtemp);
1556 }
1557 else
1558 {
1559 *str_target = sptr;
1560 freesptr = FALSE;
1561 }
1562 break;
1563
1564 case opt_rewrite:
1565 if (data_block == NULL)
1566 *((uschar **)(ol->value)) = sptr;
1567 else
1568 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1569 freesptr = FALSE;
1570 if (type == opt_rewrite)
1571 {
1572 int sep = 0;
1573 int *flagptr;
1574 uschar *p = sptr;
1575 rewrite_rule **chain;
1576 optionlist *ol3;
1577
1578 sprintf(CS name2, "*%.50s_rules", name);
1579 ol2 = find_option(name2, oltop, last);
1580 sprintf(CS name2, "*%.50s_flags", name);
1581 ol3 = find_option(name2, oltop, last);
1582
1583 if (ol2 == NULL || ol3 == NULL)
1584 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1585 "rewrite rules not available for driver");
1586
1587 if (data_block == NULL)
1588 {
1589 chain = (rewrite_rule **)(ol2->value);
1590 flagptr = (int *)(ol3->value);
1591 }
1592 else
1593 {
1594 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1595 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1596 }
1597
1598 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1599 != NULL)
1600 {
1601 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1602 *chain = next;
1603 chain = &(next->next);
1604 }
1605
1606 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1607 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1608 "non-header rewrite - not allowed at transport time -");
1609 }
1610 break;
1611
1612 /* If it was an expanded uid, see if there is any expansion to be
1613 done by checking for the presence of a $ character. If there is, save it
1614 in the corresponding *expand_user option field. Otherwise, fall through
1615 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1616 of data. */
1617
1618 case opt_expand_uid:
1619 sprintf(CS name2, "*expand_%.50s", name);
1620 ol2 = find_option(name2, oltop, last);
1621 if (ol2 != NULL)
1622 {
1623 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1624
1625 if (data_block == NULL)
1626 *((uschar **)(ol2->value)) = ss;
1627 else
1628 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1629
1630 if (ss != NULL)
1631 {
1632 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1633 freesptr = FALSE;
1634 break;
1635 }
1636 }
1637
1638 /* Look up a fixed uid, and also make use of the corresponding gid
1639 if a passwd entry is returned and the gid has not been set. */
1640
1641 case opt_uid:
1642 if (!route_finduser(sptr, &pw, &uid))
1643 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1644 if (data_block == NULL)
1645 *((uid_t *)(ol->value)) = uid;
1646 else
1647 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1648
1649 /* Set the flag indicating a fixed value is set */
1650
1651 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1652
1653 /* Handle matching gid if we have a passwd entry: done by finding the
1654 same name with terminating "user" changed to "group"; if not found,
1655 ignore. Also ignore if the value is already set. */
1656
1657 if (pw == NULL) break;
1658 Ustrcpy(name+Ustrlen(name)-4, "group");
1659 ol2 = find_option(name, oltop, last);
1660 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1661 (ol2->type & opt_mask) == opt_expand_gid))
1662 {
1663 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1664 if (! *set_flag)
1665 {
1666 if (data_block == NULL)
1667 *((gid_t *)(ol2->value)) = pw->pw_gid;
1668 else
1669 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1670 *set_flag = TRUE;
1671 }
1672 }
1673 break;
1674
1675 /* If it was an expanded gid, see if there is any expansion to be
1676 done by checking for the presence of a $ character. If there is, save it
1677 in the corresponding *expand_user option field. Otherwise, fall through
1678 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1679 of data. */
1680
1681 case opt_expand_gid:
1682 sprintf(CS name2, "*expand_%.50s", name);
1683 ol2 = find_option(name2, oltop, last);
1684 if (ol2 != NULL)
1685 {
1686 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1687
1688 if (data_block == NULL)
1689 *((uschar **)(ol2->value)) = ss;
1690 else
1691 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1692
1693 if (ss != NULL)
1694 {
1695 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1696 freesptr = FALSE;
1697 break;
1698 }
1699 }
1700
1701 /* Handle freestanding gid */
1702
1703 case opt_gid:
1704 if (!route_findgroup(sptr, &gid))
1705 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1706 if (data_block == NULL)
1707 *((gid_t *)(ol->value)) = gid;
1708 else
1709 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1710 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1711 break;
1712
1713 /* If it was a uid list, look up each individual entry, and build
1714 a vector of uids, with a count in the first element. Put the vector
1715 in malloc store so we can free the string. (We are reading into
1716 permanent store already.) */
1717
1718 case opt_uidlist:
1719 {
1720 int count = 1;
1721 uid_t *list;
1722 int ptr = 0;
1723 uschar *p;
1724 uschar *op = expand_string (sptr);
1725
1726 if (op == NULL)
1727 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1728 name, expand_string_message);
1729
1730 p = op;
1731 if (*p != 0) count++;
1732 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1733 list = store_malloc(count*sizeof(uid_t));
1734 list[ptr++] = (uid_t)(count - 1);
1735
1736 if (data_block == NULL)
1737 *((uid_t **)(ol->value)) = list;
1738 else
1739 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1740
1741 p = op;
1742 while (count-- > 1)
1743 {
1744 int sep = 0;
1745 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1746 if (!route_finduser(big_buffer, NULL, &uid))
1747 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1748 big_buffer);
1749 list[ptr++] = uid;
1750 }
1751 }
1752 break;
1753
1754 /* If it was a gid list, look up each individual entry, and build
1755 a vector of gids, with a count in the first element. Put the vector
1756 in malloc store so we can free the string. (We are reading into permanent
1757 store already.) */
1758
1759 case opt_gidlist:
1760 {
1761 int count = 1;
1762 gid_t *list;
1763 int ptr = 0;
1764 uschar *p;
1765 uschar *op = expand_string (sptr);
1766
1767 if (op == NULL)
1768 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1769 name, expand_string_message);
1770
1771 p = op;
1772 if (*p != 0) count++;
1773 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1774 list = store_malloc(count*sizeof(gid_t));
1775 list[ptr++] = (gid_t)(count - 1);
1776
1777 if (data_block == NULL)
1778 *((gid_t **)(ol->value)) = list;
1779 else
1780 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1781
1782 p = op;
1783 while (count-- > 1)
1784 {
1785 int sep = 0;
1786 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1787 if (!route_findgroup(big_buffer, &gid))
1788 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1789 big_buffer);
1790 list[ptr++] = gid;
1791 }
1792 }
1793 break;
1794 }
1795
1796 /* Release store if the value of the string doesn't need to be kept. */
1797
1798 if (freesptr) store_reset(reset_point);
1799 break;
1800
1801 /* Expanded boolean: if no characters follow, or if there are no dollar
1802 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1803 save the string for later expansion in the alternate place. */
1804
1805 case opt_expand_bool:
1806 if (*s != 0 && Ustrchr(s, '$') != 0)
1807 {
1808 sprintf(CS name2, "*expand_%.50s", name);
1809 ol2 = find_option(name2, oltop, last);
1810 if (ol2 != NULL)
1811 {
1812 reset_point = sptr = read_string(s, name);
1813 if (data_block == NULL)
1814 *((uschar **)(ol2->value)) = sptr;
1815 else
1816 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1817 freesptr = FALSE;
1818 break;
1819 }
1820 }
1821 /* Fall through */
1822
1823 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1824 look for yes/not/true/false. Some booleans are stored in a single bit in
1825 a single int. There's a special fudge for verify settings; without a suffix
1826 they set both xx_sender and xx_recipient. The table points to the sender
1827 value; search subsequently for the recipient. There's another special case:
1828 opt_bool_set also notes when a boolean has been set. */
1829
1830 case opt_bool:
1831 case opt_bit:
1832 case opt_bool_verify:
1833 case opt_bool_set:
1834 if (*s != 0)
1835 {
1836 s = readconf_readname(name2, 64, s);
1837 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1838 boolvalue = TRUE;
1839 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1840 boolvalue = FALSE;
1841 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1842 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1843 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1844 US"for boolean option ", name);
1845 }
1846
1847 /* Handle single-bit type. */
1848
1849 if (type == opt_bit)
1850 {
1851 int bit = 1 << ((ol->type >> 16) & 31);
1852 int *ptr = (data_block == NULL)?
1853 (int *)(ol->value) :
1854 (int *)((uschar *)data_block + (long int)ol->value);
1855 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1856 break;
1857 }
1858
1859 /* Handle full BOOL types */
1860
1861 if (data_block == NULL)
1862 *((BOOL *)(ol->value)) = boolvalue;
1863 else
1864 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1865
1866 /* Verify fudge */
1867
1868 if (type == opt_bool_verify)
1869 {
1870 sprintf(CS name2, "%.50s_recipient", name + offset);
1871 ol2 = find_option(name2, oltop, last);
1872 if (ol2 != NULL)
1873 {
1874 if (data_block == NULL)
1875 *((BOOL *)(ol2->value)) = boolvalue;
1876 else
1877 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1878 }
1879 }
1880
1881 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1882
1883 else if (type == opt_bool_set)
1884 {
1885 sprintf(CS name2, "*set_%.50s", name + offset);
1886 ol2 = find_option(name2, oltop, last);
1887 if (ol2 != NULL)
1888 {
1889 if (data_block == NULL)
1890 *((BOOL *)(ol2->value)) = TRUE;
1891 else
1892 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1893 }
1894 }
1895 break;
1896
1897 /* Octal integer */
1898
1899 case opt_octint:
1900 intbase = 8;
1901 inttype = US"octal ";
1902
1903 /* Integer: a simple(ish) case; allow octal and hex formats, and
1904 suffixes K and M. The different types affect output, not input. */
1905
1906 case opt_mkint:
1907 case opt_int:
1908 {
1909 uschar *endptr;
1910 long int lvalue;
1911
1912 errno = 0;
1913 lvalue = strtol(CS s, CSS &endptr, intbase);
1914
1915 if (endptr == s)
1916 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1917 inttype, name);
1918
1919 if (errno != ERANGE)
1920 {
1921 if (tolower(*endptr) == 'k')
1922 {
1923 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1924 else lvalue *= 1024;
1925 endptr++;
1926 }
1927 else if (tolower(*endptr) == 'm')
1928 {
1929 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1930 errno = ERANGE;
1931 else lvalue *= 1024*1024;
1932 endptr++;
1933 }
1934 }
1935
1936 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1937 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1938 "absolute value of integer \"%s\" is too large (overflow)", s);
1939
1940 while (isspace(*endptr)) endptr++;
1941 if (*endptr != 0)
1942 extra_chars_error(endptr, inttype, US"integer value for ", name);
1943
1944 value = (int)lvalue;
1945 }
1946
1947 if (data_block == NULL)
1948 *((int *)(ol->value)) = value;
1949 else
1950 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1951 break;
1952
1953 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1954 M. */
1955
1956 case opt_Kint:
1957 {
1958 uschar *endptr;
1959 errno = 0;
1960 value = strtol(CS s, CSS &endptr, intbase);
1961
1962 if (endptr == s)
1963 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1964 inttype, name);
1965
1966 if (errno != ERANGE)
1967 {
1968 if (tolower(*endptr) == 'm')
1969 {
1970 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1971 else value *= 1024;
1972 endptr++;
1973 }
1974 else if (tolower(*endptr) == 'k')
1975 {
1976 endptr++;
1977 }
1978 else
1979 {
1980 value = (value + 512)/1024;
1981 }
1982 }
1983
1984 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1985 "absolute value of integer \"%s\" is too large (overflow)", s);
1986
1987 while (isspace(*endptr)) endptr++;
1988 if (*endptr != 0)
1989 extra_chars_error(endptr, inttype, US"integer value for ", name);
1990 }
1991
1992 if (data_block == NULL)
1993 *((int *)(ol->value)) = value;
1994 else
1995 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1996 break;
1997
1998 /* Fixed-point number: held to 3 decimal places. */
1999
2000 case opt_fixed:
2001 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2002 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2003 "fixed-point number expected for %s", name);
2004
2005 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2006 "integer \"%s\" is too large (overflow)", s);
2007
2008 value *= 1000;
2009
2010 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2011 "integer \"%s\" is too large (overflow)", s);
2012
2013 if (s[count] == '.')
2014 {
2015 int d = 100;
2016 while (isdigit(s[++count]))
2017 {
2018 value += (s[count] - '0') * d;
2019 d /= 10;
2020 }
2021 }
2022
2023 while (isspace(s[count])) count++;
2024
2025 if (s[count] != 0)
2026 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2027
2028 if (data_block == NULL)
2029 *((int *)(ol->value)) = value;
2030 else
2031 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2032 break;
2033
2034 /* There's a special routine to read time values. */
2035
2036 case opt_time:
2037 value = readconf_readtime(s, 0, FALSE);
2038 if (value < 0)
2039 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2040 name);
2041 if (data_block == NULL)
2042 *((int *)(ol->value)) = value;
2043 else
2044 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2045 break;
2046
2047 /* A time list is a list of colon-separated times, with the first
2048 element holding the size of the list and the second the number of
2049 entries used. */
2050
2051 case opt_timelist:
2052 {
2053 int count = 0;
2054 int *list = (data_block == NULL)?
2055 (int *)(ol->value) :
2056 (int *)((uschar *)data_block + (long int)(ol->value));
2057
2058 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2059 {
2060 int terminator = 0;
2061 uschar *snext = Ustrchr(s, ':');
2062 if (snext != NULL)
2063 {
2064 uschar *ss = snext;
2065 while (ss > s && isspace(ss[-1])) ss--;
2066 terminator = *ss;
2067 }
2068 value = readconf_readtime(s, terminator, FALSE);
2069 if (value < 0)
2070 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2071 name);
2072 if (count > 1 && value <= list[count])
2073 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2074 "time value out of order for %s", name);
2075 list[count+1] = value;
2076 if (snext == NULL) break;
2077 s = snext + 1;
2078 while (isspace(*s)) s++;
2079 }
2080
2081 if (count > list[0] - 2)
2082 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2083 name);
2084 if (count > 0 && list[2] == 0) count = 0;
2085 list[1] = count;
2086 }
2087
2088 break;
2089 }
2090
2091 return TRUE;
2092 }
2093
2094
2095
2096 /*************************************************
2097 * Print a time value *
2098 *************************************************/
2099
2100 /*
2101 Argument: a time value in seconds
2102 Returns: pointer to a fixed buffer containing the time as a string,
2103 in readconf_readtime() format
2104 */
2105
2106 uschar *
2107 readconf_printtime(int t)
2108 {
2109 int s, m, h, d, w;
2110 uschar *p = time_buffer;
2111
2112 if (t < 0)
2113 {
2114 *p++ = '-';
2115 t = -t;
2116 }
2117
2118 s = t % 60;
2119 t /= 60;
2120 m = t % 60;
2121 t /= 60;
2122 h = t % 24;
2123 t /= 24;
2124 d = t % 7;
2125 w = t/7;
2126
2127 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2128 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2129 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2130 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2131 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2132
2133 return time_buffer;
2134 }
2135
2136
2137
2138 /*************************************************
2139 * Print an individual option value *
2140 *************************************************/
2141
2142 /* This is used by the -bP option, so prints to the standard output.
2143 The entire options list is passed in as an argument, because some options come
2144 in pairs - typically uid/gid settings, which can either be explicit numerical
2145 values, or strings to be expanded later. If the numerical value is unset,
2146 search for "*expand_<name>" to see if there is a string equivalent.
2147
2148 Arguments:
2149 ol option entry, or NULL for an unknown option
2150 name option name
2151 options_block NULL for main configuration options; otherwise points to
2152 a driver block; if the option doesn't have opt_public
2153 set, then options_block->options_block is where the item
2154 resides.
2155 oltop points to the option list in which ol exists
2156 last one more than the offset of the last entry in optop
2157 no_labels do not show "foo = " at the start.
2158
2159 Returns: nothing
2160 */
2161
2162 static void
2163 print_ol(optionlist *ol, uschar *name, void *options_block,
2164 optionlist *oltop, int last, BOOL no_labels)
2165 {
2166 struct passwd *pw;
2167 struct group *gr;
2168 optionlist *ol2;
2169 void *value;
2170 uid_t *uidlist;
2171 gid_t *gidlist;
2172 uschar *s;
2173 uschar name2[64];
2174
2175 if (ol == NULL)
2176 {
2177 printf("%s is not a known option\n", name);
2178 return;
2179 }
2180
2181 /* Non-admin callers cannot see options that have been flagged secure by the
2182 "hide" prefix. */
2183
2184 if (!admin_user && (ol->type & opt_secure) != 0)
2185 {
2186 const char * const hidden = "<value not displayable>";
2187 if (no_labels)
2188 printf("%s\n", hidden);
2189 else
2190 printf("%s = %s\n", name, hidden);
2191 return;
2192 }
2193
2194 /* Else show the value of the option */
2195
2196 value = ol->value;
2197 if (options_block != NULL)
2198 {
2199 if ((ol->type & opt_public) == 0)
2200 options_block = (void *)(((driver_instance *)options_block)->options_block);
2201 value = (void *)((uschar *)options_block + (long int)value);
2202 }
2203
2204 switch(ol->type & opt_mask)
2205 {
2206 case opt_stringptr:
2207 case opt_rewrite: /* Show the text value */
2208 s = *((uschar **)value);
2209 if (!no_labels) printf("%s = ", name);
2210 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2211 break;
2212
2213 case opt_int:
2214 if (!no_labels) printf("%s = ", name);
2215 printf("%d\n", *((int *)value));
2216 break;
2217
2218 case opt_mkint:
2219 {
2220 int x = *((int *)value);
2221 if (x != 0 && (x & 1023) == 0)
2222 {
2223 int c = 'K';
2224 x >>= 10;
2225 if ((x & 1023) == 0)
2226 {
2227 c = 'M';
2228 x >>= 10;
2229 }
2230 if (!no_labels) printf("%s = ", name);
2231 printf("%d%c\n", x, c);
2232 }
2233 else
2234 {
2235 if (!no_labels) printf("%s = ", name);
2236 printf("%d\n", x);
2237 }
2238 }
2239 break;
2240
2241 case opt_Kint:
2242 {
2243 int x = *((int *)value);
2244 if (!no_labels) printf("%s = ", name);
2245 if (x == 0) printf("0\n");
2246 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2247 else printf("%dK\n", x);
2248 }
2249 break;
2250
2251 case opt_octint:
2252 if (!no_labels) printf("%s = ", name);
2253 printf("%#o\n", *((int *)value));
2254 break;
2255
2256 /* Can be negative only when "unset", in which case integer */
2257
2258 case opt_fixed:
2259 {
2260 int x = *((int *)value);
2261 int f = x % 1000;
2262 int d = 100;
2263 if (x < 0) printf("%s =\n", name); else
2264 {
2265 if (!no_labels) printf("%s = ", name);
2266 printf("%d.", x/1000);
2267 do
2268 {
2269 printf("%d", f/d);
2270 f %= d;
2271 d /= 10;
2272 }
2273 while (f != 0);
2274 printf("\n");
2275 }
2276 }
2277 break;
2278
2279 /* If the numerical value is unset, try for the string value */
2280
2281 case opt_expand_uid:
2282 if (! *get_set_flag(name, oltop, last, options_block))
2283 {
2284 sprintf(CS name2, "*expand_%.50s", name);
2285 ol2 = find_option(name2, oltop, last);
2286 if (ol2 != NULL)
2287 {
2288 void *value2 = ol2->value;
2289 if (options_block != NULL)
2290 value2 = (void *)((uschar *)options_block + (long int)value2);
2291 s = *((uschar **)value2);
2292 if (!no_labels) printf("%s = ", name);
2293 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2294 break;
2295 }
2296 }
2297
2298 /* Else fall through */
2299
2300 case opt_uid:
2301 if (!no_labels) printf("%s = ", name);
2302 if (! *get_set_flag(name, oltop, last, options_block))
2303 printf("\n");
2304 else
2305 {
2306 pw = getpwuid(*((uid_t *)value));
2307 if (pw == NULL)
2308 printf("%ld\n", (long int)(*((uid_t *)value)));
2309 else printf("%s\n", pw->pw_name);
2310 }
2311 break;
2312
2313 /* If the numerical value is unset, try for the string value */
2314
2315 case opt_expand_gid:
2316 if (! *get_set_flag(name, oltop, last, options_block))
2317 {
2318 sprintf(CS name2, "*expand_%.50s", name);
2319 ol2 = find_option(name2, oltop, last);
2320 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2321 {
2322 void *value2 = ol2->value;
2323 if (options_block != NULL)
2324 value2 = (void *)((uschar *)options_block + (long int)value2);
2325 s = *((uschar **)value2);
2326 if (!no_labels) printf("%s = ", name);
2327 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2328 break;
2329 }
2330 }
2331
2332 /* Else fall through */
2333
2334 case opt_gid:
2335 if (!no_labels) printf("%s = ", name);
2336 if (! *get_set_flag(name, oltop, last, options_block))
2337 printf("\n");
2338 else
2339 {
2340 gr = getgrgid(*((int *)value));
2341 if (gr == NULL)
2342 printf("%ld\n", (long int)(*((int *)value)));
2343 else printf("%s\n", gr->gr_name);
2344 }
2345 break;
2346
2347 case opt_uidlist:
2348 uidlist = *((uid_t **)value);
2349 if (!no_labels) printf("%s =", name);
2350 if (uidlist != NULL)
2351 {
2352 int i;
2353 uschar sep = ' ';
2354 if (no_labels) sep = '\0';
2355 for (i = 1; i <= (int)(uidlist[0]); i++)
2356 {
2357 uschar *name = NULL;
2358 pw = getpwuid(uidlist[i]);
2359 if (pw != NULL) name = US pw->pw_name;
2360 if (sep != '\0') printf("%c", sep);
2361 if (name != NULL) printf("%s", name);
2362 else printf("%ld", (long int)(uidlist[i]));
2363 sep = ':';
2364 }
2365 }
2366 printf("\n");
2367 break;
2368
2369 case opt_gidlist:
2370 gidlist = *((gid_t **)value);
2371 if (!no_labels) printf("%s =", name);
2372 if (gidlist != NULL)
2373 {
2374 int i;
2375 uschar sep = ' ';
2376 if (no_labels) sep = '\0';
2377 for (i = 1; i <= (int)(gidlist[0]); i++)
2378 {
2379 uschar *name = NULL;
2380 gr = getgrgid(gidlist[i]);
2381 if (gr != NULL) name = US gr->gr_name;
2382 if (sep != '\0') printf("%c", sep);
2383 if (name != NULL) printf("%s", name);
2384 else printf("%ld", (long int)(gidlist[i]));
2385 sep = ':';
2386 }
2387 }
2388 printf("\n");
2389 break;
2390
2391 case opt_time:
2392 if (!no_labels) printf("%s = ", name);
2393 printf("%s\n", readconf_printtime(*((int *)value)));
2394 break;
2395
2396 case opt_timelist:
2397 {
2398 int i;
2399 int *list = (int *)value;
2400 if (!no_labels) printf("%s = ", name);
2401 for (i = 0; i < list[1]; i++)
2402 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2403 printf("\n");
2404 }
2405 break;
2406
2407 case opt_bit:
2408 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2409 "" : "no_", name);
2410 break;
2411
2412 case opt_expand_bool:
2413 sprintf(CS name2, "*expand_%.50s", name);
2414 ol2 = find_option(name2, oltop, last);
2415 if (ol2 != NULL && ol2->value != NULL)
2416 {
2417 void *value2 = ol2->value;
2418 if (options_block != NULL)
2419 value2 = (void *)((uschar *)options_block + (long int)value2);
2420 s = *((uschar **)value2);
2421 if (s != NULL)
2422 {
2423 if (!no_labels) printf("%s = ", name);
2424 printf("%s\n", string_printing(s));
2425 break;
2426 }
2427 /* s == NULL => string not set; fall through */
2428 }
2429
2430 /* Fall through */
2431
2432 case opt_bool:
2433 case opt_bool_verify:
2434 case opt_bool_set:
2435 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2436 break;
2437 }
2438 }
2439
2440
2441
2442 /*************************************************
2443 * Print value from main configuration *
2444 *************************************************/
2445
2446 /* This function, called as a result of encountering the -bP option,
2447 causes the value of any main configuration variable to be output if the
2448 second argument is NULL. There are some special values:
2449
2450 all print all main configuration options
2451 configure_file print the name of the configuration file
2452 routers print the routers' configurations
2453 transports print the transports' configuration
2454 authenticators print the authenticators' configuration
2455 macros print the macros' configuration
2456 router_list print a list of router names
2457 transport_list print a list of transport names
2458 authenticator_list print a list of authentication mechanism names
2459 macro_list print a list of macro names
2460 +name print a named list item
2461 local_scan print the local_scan options
2462
2463 If the second argument is not NULL, it must be one of "router", "transport",
2464 "authenticator" or "macro" in which case the first argument identifies the
2465 driver whose options are to be printed.
2466
2467 Arguments:
2468 name option name if type == NULL; else driver name
2469 type NULL or driver type name, as described above
2470 no_labels avoid the "foo = " at the start of an item
2471
2472 Returns: nothing
2473 */
2474
2475 void
2476 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2477 {
2478 BOOL names_only = FALSE;
2479 optionlist *ol;
2480 optionlist *ol2 = NULL;
2481 driver_instance *d = NULL;
2482 macro_item *m;
2483 int size = 0;
2484
2485 if (type == NULL)
2486 {
2487 if (*name == '+')
2488 {
2489 int i;
2490 tree_node *t;
2491 BOOL found = FALSE;
2492 static uschar *types[] = { US"address", US"domain", US"host",
2493 US"localpart" };
2494 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2495 &hostlist_anchor, &localpartlist_anchor };
2496
2497 for (i = 0; i < 4; i++)
2498 {
2499 t = tree_search(*(anchors[i]), name+1);
2500 if (t != NULL)
2501 {
2502 found = TRUE;
2503 if (no_labels)
2504 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2505 else
2506 printf("%slist %s = %s\n", types[i], name+1,
2507 ((namedlist_block *)(t->data.ptr))->string);
2508 }
2509 }
2510
2511 if (!found)
2512 printf("no address, domain, host, or local part list called \"%s\" "
2513 "exists\n", name+1);
2514
2515 return;
2516 }
2517
2518 if (Ustrcmp(name, "configure_file") == 0)
2519 {
2520 printf("%s\n", CS config_main_filename);
2521 return;
2522 }
2523
2524 if (Ustrcmp(name, "all") == 0)
2525 {
2526 for (ol = optionlist_config;
2527 ol < optionlist_config + optionlist_config_size; ol++)
2528 {
2529 if ((ol->type & opt_hidden) == 0)
2530 print_ol(ol, US ol->name, NULL,
2531 optionlist_config, optionlist_config_size,
2532 no_labels);
2533 }
2534 return;
2535 }
2536
2537 if (Ustrcmp(name, "local_scan") == 0)
2538 {
2539 #ifndef LOCAL_SCAN_HAS_OPTIONS
2540 printf("local_scan() options are not supported\n");
2541 #else
2542 for (ol = local_scan_options;
2543 ol < local_scan_options + local_scan_options_count; ol++)
2544 {
2545 print_ol(ol, US ol->name, NULL, local_scan_options,
2546 local_scan_options_count, no_labels);
2547 }
2548 #endif
2549 return;
2550 }
2551
2552 if (Ustrcmp(name, "routers") == 0)
2553 {
2554 type = US"router";
2555 name = NULL;
2556 }
2557 else if (Ustrcmp(name, "transports") == 0)
2558 {
2559 type = US"transport";
2560 name = NULL;
2561 }
2562
2563 else if (Ustrcmp(name, "authenticators") == 0)
2564 {
2565 type = US"authenticator";
2566 name = NULL;
2567 }
2568
2569 else if (Ustrcmp(name, "macros") == 0)
2570 {
2571 type = US"macro";
2572 name = NULL;
2573 }
2574
2575 else if (Ustrcmp(name, "router_list") == 0)
2576 {
2577 type = US"router";
2578 name = NULL;
2579 names_only = TRUE;
2580 }
2581
2582 else if (Ustrcmp(name, "transport_list") == 0)
2583 {
2584 type = US"transport";
2585 name = NULL;
2586 names_only = TRUE;
2587 }
2588
2589 else if (Ustrcmp(name, "authenticator_list") == 0)
2590 {
2591 type = US"authenticator";
2592 name = NULL;
2593 names_only = TRUE;
2594 }
2595
2596 else if (Ustrcmp(name, "macro_list") == 0)
2597 {
2598 type = US"macro";
2599 name = NULL;
2600 names_only = TRUE;
2601 }
2602
2603 else
2604 {
2605 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2606 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2607 return;
2608 }
2609 }
2610
2611 /* Handle the options for a router or transport. Skip options that are flagged
2612 as hidden. Some of these are options with names starting with '*', used for
2613 internal alternative representations of other options (which the printing
2614 function will sort out). Others are synonyms kept for backward compatibility.
2615 */
2616
2617 if (Ustrcmp(type, "router") == 0)
2618 {
2619 d = (driver_instance *)routers;
2620 ol2 = optionlist_routers;
2621 size = optionlist_routers_size;
2622 }
2623 else if (Ustrcmp(type, "transport") == 0)
2624 {
2625 d = (driver_instance *)transports;
2626 ol2 = optionlist_transports;
2627 size = optionlist_transports_size;
2628 }
2629 else if (Ustrcmp(type, "authenticator") == 0)
2630 {
2631 d = (driver_instance *)auths;
2632 ol2 = optionlist_auths;
2633 size = optionlist_auths_size;
2634 }
2635
2636 else if (Ustrcmp(type, "macro") == 0)
2637 {
2638 /* People store passwords in macros and they were previously not available
2639 for printing. So we have an admin_users restriction. */
2640 if (!admin_user)
2641 {
2642 fprintf(stderr, "exim: permission denied\n");
2643 exit(EXIT_FAILURE);
2644 }
2645 for (m = macros; m != NULL; m = m->next)
2646 {
2647 if (name == NULL || Ustrcmp(name, m->name) == 0)
2648 {
2649 if (names_only)
2650 printf("%s\n", CS m->name);
2651 else
2652 printf("%s=%s\n", CS m->name, CS m->replacement);
2653 if (name != NULL)
2654 return;
2655 }
2656 }
2657 if (name != NULL)
2658 printf("%s %s not found\n", type, name);
2659 return;
2660 }
2661
2662 if (names_only)
2663 {
2664 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2665 return;
2666 }
2667
2668 /* Either search for a given driver, or print all of them */
2669
2670 for (; d != NULL; d = d->next)
2671 {
2672 if (name == NULL)
2673 printf("\n%s %s:\n", d->name, type);
2674 else if (Ustrcmp(d->name, name) != 0) continue;
2675
2676 for (ol = ol2; ol < ol2 + size; ol++)
2677 {
2678 if ((ol->type & opt_hidden) == 0)
2679 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2680 }
2681
2682 for (ol = d->info->options;
2683 ol < d->info->options + *(d->info->options_count); ol++)
2684 {
2685 if ((ol->type & opt_hidden) == 0)
2686 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2687 }
2688 if (name != NULL) return;
2689 }
2690 if (name != NULL) printf("%s %s not found\n", type, name);
2691 }
2692
2693
2694
2695 /*************************************************
2696 * Read a named list item *
2697 *************************************************/
2698
2699 /* This function reads a name and a list (i.e. string). The name is used to
2700 save the list in a tree, sorted by its name. Each entry also has a number,
2701 which can be used for caching tests, but if the string contains any expansion
2702 items other than $key, the number is set negative to inhibit caching. This
2703 mechanism is used for domain, host, and address lists that are referenced by
2704 the "+name" syntax.
2705
2706 Arguments:
2707 anchorp points to the tree anchor
2708 numberp points to the current number for this tree
2709 max the maximum number permitted
2710 s the text of the option line, starting immediately after the name
2711 of the list type
2712 tname the name of the list type, for messages
2713
2714 Returns: nothing
2715 */
2716
2717 static void
2718 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2719 uschar *tname)
2720 {
2721 BOOL forcecache = FALSE;
2722 uschar *ss;
2723 tree_node *t;
2724 namedlist_block *nb = store_get(sizeof(namedlist_block));
2725
2726 if (Ustrncmp(s, "_cache", 6) == 0)
2727 {
2728 forcecache = TRUE;
2729 s += 6;
2730 }
2731
2732 if (!isspace(*s))
2733 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2734
2735 if (*numberp >= max)
2736 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2737 tname, max);
2738
2739 while (isspace(*s)) s++;
2740 ss = s;
2741 while (isalnum(*s) || *s == '_') s++;
2742 t = store_get(sizeof(tree_node) + s-ss);
2743 Ustrncpy(t->name, ss, s-ss);
2744 t->name[s-ss] = 0;
2745 while (isspace(*s)) s++;
2746
2747 if (!tree_insertnode(anchorp, t))
2748 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2749 "duplicate name \"%s\" for a named %s", t->name, tname);
2750
2751 t->data.ptr = nb;
2752 nb->number = *numberp;
2753 *numberp += 1;
2754
2755 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2756 "missing '=' after \"%s\"", t->name);
2757 while (isspace(*s)) s++;
2758 nb->string = read_string(s, t->name);
2759 nb->cache_data = NULL;
2760
2761 /* Check the string for any expansions; if any are found, mark this list
2762 uncacheable unless the user has explicited forced caching. */
2763
2764 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2765 }
2766
2767
2768
2769
2770 /*************************************************
2771 * Unpick data for a rate limit *
2772 *************************************************/
2773
2774 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2775 separate values.
2776
2777 Arguments:
2778 s string, in the form t,b,f,l
2779 where t is the threshold (integer)
2780 b is the initial delay (time)
2781 f is the multiplicative factor (fixed point)
2782 k is the maximum time (time)
2783 threshold where to store threshold
2784 base where to store base in milliseconds
2785 factor where to store factor in milliseconds
2786 limit where to store limit
2787
2788 Returns: nothing (panics on error)
2789 */
2790
2791 static void
2792 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2793 int *limit)
2794 {
2795 uschar bstring[16], lstring[16];
2796
2797 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2798 factor, lstring) == 4)
2799 {
2800 *base = readconf_readtime(bstring, 0, TRUE);
2801 *limit = readconf_readtime(lstring, 0, TRUE);
2802 if (*base >= 0 && *limit >= 0) return;
2803 }
2804 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2805 }
2806
2807
2808
2809
2810 /*************************************************
2811 * Drop privs for checking TLS config *
2812 *************************************************/
2813
2814 /* We want to validate TLS options during readconf, but do not want to be
2815 root when we call into the TLS library, in case of library linkage errors
2816 which cause segfaults; before this check, those were always done as the Exim
2817 runtime user and it makes sense to continue with that.
2818
2819 Assumes: tls_require_ciphers has been set, if it will be
2820 exim_user has been set, if it will be
2821 exim_group has been set, if it will be
2822
2823 Returns: bool for "okay"; false will cause caller to immediately exit.
2824 */
2825
2826 #ifdef SUPPORT_TLS
2827 static BOOL
2828 tls_dropprivs_validate_require_cipher(void)
2829 {
2830 const uschar *errmsg;
2831 pid_t pid;
2832 int rc, status;
2833 void (*oldsignal)(int);
2834
2835 oldsignal = signal(SIGCHLD, SIG_DFL);
2836
2837 fflush(NULL);
2838 if ((pid = fork()) < 0)
2839 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2840
2841 if (pid == 0)
2842 {
2843 /* in some modes, will have dropped privilege already */
2844 if (!geteuid())
2845 exim_setugid(exim_uid, exim_gid, FALSE,
2846 US"calling tls_validate_require_cipher");
2847
2848 errmsg = tls_validate_require_cipher();
2849 if (errmsg)
2850 {
2851 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2852 "tls_require_ciphers invalid: %s", errmsg);
2853 }
2854 fflush(NULL);
2855 _exit(0);
2856 }
2857
2858 do {
2859 rc = waitpid(pid, &status, 0);
2860 } while (rc < 0 && errno == EINTR);
2861
2862 DEBUG(D_tls)
2863 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2864 (int)pid, status);
2865
2866 signal(SIGCHLD, oldsignal);
2867
2868 return status == 0;
2869 }
2870 #endif /* SUPPORT_TLS */
2871
2872
2873
2874
2875 /*************************************************
2876 * Read main configuration options *
2877 *************************************************/
2878
2879 /* This function is the first to be called for configuration reading. It
2880 opens the configuration file and reads general configuration settings until
2881 it reaches the end of the configuration section. The file is then left open so
2882 that the remaining configuration data can subsequently be read if needed for
2883 this run of Exim.
2884
2885 The configuration file must be owned either by root or exim, and be writeable
2886 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2887 in the config file, so the test is done on the compiled in values. A slight
2888 anomaly, to be carefully documented.
2889
2890 The name of the configuration file is taken from a list that is included in the
2891 binary of Exim. It can be altered from the command line, but if that is done,
2892 root privilege is immediately withdrawn unless the caller is root or exim.
2893 The first file on the list that exists is used.
2894
2895 For use on multiple systems that share file systems, first look for a
2896 configuration file whose name has the current node name on the end. If that is
2897 not found, try the generic name. For really contorted configurations, that run
2898 multiple Exims with different uid settings, first try adding the effective uid
2899 before the node name. These complications are going to waste resources on most
2900 systems. Therefore they are available only when requested by compile-time
2901 options. */
2902
2903 void
2904 readconf_main(void)
2905 {
2906 int sep = 0;
2907 struct stat statbuf;
2908 uschar *s, *filename;
2909 uschar *list = config_main_filelist;
2910
2911 /* Loop through the possible file names */
2912
2913 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2914 != NULL)
2915 {
2916 /* Cut out all the fancy processing unless specifically wanted */
2917
2918 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2919 uschar *suffix = filename + Ustrlen(filename);
2920
2921 /* Try for the node-specific file if a node name exists */
2922
2923 #ifdef CONFIGURE_FILE_USE_NODE
2924 struct utsname uts;
2925 if (uname(&uts) >= 0)
2926 {
2927 #ifdef CONFIGURE_FILE_USE_EUID
2928 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2929 config_file = Ufopen(filename, "rb");
2930 if (config_file == NULL)
2931 #endif /* CONFIGURE_FILE_USE_EUID */
2932 {
2933 sprintf(CS suffix, ".%.256s", uts.nodename);
2934 config_file = Ufopen(filename, "rb");
2935 }
2936 }
2937 #endif /* CONFIGURE_FILE_USE_NODE */
2938
2939 /* Otherwise, try the generic name, possibly with the euid added */
2940
2941 #ifdef CONFIGURE_FILE_USE_EUID
2942 if (config_file == NULL)
2943 {
2944 sprintf(CS suffix, ".%ld", (long int)original_euid);
2945 config_file = Ufopen(filename, "rb");
2946 }
2947 #endif /* CONFIGURE_FILE_USE_EUID */
2948
2949 /* Finally, try the unadorned name */
2950
2951 if (config_file == NULL)
2952 {
2953 *suffix = 0;
2954 config_file = Ufopen(filename, "rb");
2955 }
2956 #else /* if neither defined */
2957
2958 /* This is the common case when the fancy processing is not included. */
2959
2960 config_file = Ufopen(filename, "rb");
2961 #endif
2962
2963 /* If the file does not exist, continue to try any others. For any other
2964 error, break out (and die). */
2965
2966 if (config_file != NULL || errno != ENOENT) break;
2967 }
2968
2969 /* On success, save the name for verification; config_filename is used when
2970 logging configuration errors (it changes for .included files) whereas
2971 config_main_filename is the name shown by -bP. Failure to open a configuration
2972 file is a serious disaster. */
2973
2974 if (config_file != NULL)
2975 {
2976 config_filename = config_main_filename = string_copy(filename);
2977 }
2978 else
2979 {
2980 if (filename == NULL)
2981 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2982 "%s", config_main_filelist);
2983 else
2984 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2985 "configuration file %s", filename));
2986 }
2987
2988 /* Check the status of the file we have opened, if we have retained root
2989 privileges and the file isn't /dev/null (which *should* be 0666). */
2990
2991 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
2992 {
2993 if (fstat(fileno(config_file), &statbuf) != 0)
2994 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2995 big_buffer);
2996
2997 if ((statbuf.st_uid != root_uid /* owner not root */
2998 #ifdef CONFIGURE_OWNER
2999 && statbuf.st_uid != config_uid /* owner not the special one */
3000 #endif
3001 ) || /* or */
3002 (statbuf.st_gid != root_gid /* group not root & */
3003 #ifdef CONFIGURE_GROUP
3004 && statbuf.st_gid != config_gid /* group not the special one */
3005 #endif
3006 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3007 /* or */
3008 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3009
3010 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3011 "wrong owner, group, or mode", big_buffer);
3012 }
3013
3014 /* Process the main configuration settings. They all begin with a lower case
3015 letter. If we see something starting with an upper case letter, it is taken as
3016 a macro definition. */
3017
3018 while ((s = get_config_line()) != NULL)
3019 {
3020 if (isupper(s[0])) read_macro_assignment(s);
3021
3022 else if (Ustrncmp(s, "domainlist", 10) == 0)
3023 read_named_list(&domainlist_anchor, &domainlist_count,
3024 MAX_NAMED_LIST, s+10, US"domain list");
3025
3026 else if (Ustrncmp(s, "hostlist", 8) == 0)
3027 read_named_list(&hostlist_anchor, &hostlist_count,
3028 MAX_NAMED_LIST, s+8, US"host list");
3029
3030 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3031 read_named_list(&addresslist_anchor, &addresslist_count,
3032 MAX_NAMED_LIST, s+11, US"address list");
3033
3034 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3035 read_named_list(&localpartlist_anchor, &localpartlist_count,
3036 MAX_NAMED_LIST, s+13, US"local part list");
3037
3038 else
3039 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3040 NULL, US"main option \"%s\" unknown");
3041 }
3042
3043
3044 /* If local_sender_retain is set, local_from_check must be unset. */
3045
3046 if (local_sender_retain && local_from_check)
3047 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3048 "local_sender_retain are set; this combination is not allowed");
3049
3050 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3051 wanted. */
3052
3053 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3054
3055 /* The max retry interval must not be greater than 24 hours. */
3056
3057 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3058
3059 /* remote_max_parallel must be > 0 */
3060
3061 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3062
3063 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3064 start of a new SMTP message. */
3065
3066 freeze_tell_config = freeze_tell;
3067
3068 /* The primary host name may be required for expansion of spool_directory
3069 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3070 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3071 canonize it. Some people like upper case letters in their host names, so we
3072 don't force the case. */
3073
3074 if (primary_hostname == NULL)
3075 {
3076 uschar *hostname;
3077 struct utsname uts;
3078 if (uname(&uts) < 0)
3079 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3080 hostname = US uts.nodename;
3081
3082 if (Ustrchr(hostname, '.') == NULL)
3083 {
3084 int af = AF_INET;
3085 struct hostent *hostdata;
3086
3087 #if HAVE_IPV6
3088 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3089 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
3090 TRUE, NULL) != OK))
3091 af = AF_INET6;
3092 #else
3093 af = AF_INET;
3094 #endif
3095
3096 for (;;)
3097 {
3098 #if HAVE_IPV6
3099 #if HAVE_GETIPNODEBYNAME
3100 int error_num;
3101 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3102 #else
3103 hostdata = gethostbyname2(CS hostname, af);
3104 #endif
3105 #else
3106 hostdata = gethostbyname(CS hostname);
3107 #endif
3108
3109 if (hostdata != NULL)
3110 {
3111 hostname = US hostdata->h_name;
3112 break;
3113 }
3114
3115 if (af == AF_INET) break;
3116 af = AF_INET;
3117 }
3118 }
3119
3120 primary_hostname = string_copy(hostname);
3121 }
3122
3123 /* Set up default value for smtp_active_hostname */
3124
3125 smtp_active_hostname = primary_hostname;
3126
3127 /* If spool_directory wasn't set in the build-time configuration, it must have
3128 got set above. Of course, writing to the log may not work if log_file_path is
3129 not set, but it will at least get to syslog or somewhere, with any luck. */
3130
3131 if (*spool_directory == 0)
3132 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3133 "proceed");
3134
3135 /* Expand the spool directory name; it may, for example, contain the primary
3136 host name. Same comment about failure. */
3137
3138 s = expand_string(spool_directory);
3139 if (s == NULL)
3140 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3141 "\"%s\": %s", spool_directory, expand_string_message);
3142 spool_directory = s;
3143
3144 /* Expand log_file_path, which must contain "%s" in any component that isn't
3145 the null string or "syslog". It is also allowed to contain one instance of %D
3146 or %M. However, it must NOT contain % followed by anything else. */
3147
3148 if (*log_file_path != 0)
3149 {
3150 uschar *ss, *sss;
3151 int sep = ':'; /* Fixed for log file path */
3152 s = expand_string(log_file_path);
3153 if (s == NULL)
3154 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3155 "\"%s\": %s", log_file_path, expand_string_message);
3156
3157 ss = s;
3158 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3159 {
3160 uschar *t;
3161 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3162 t = Ustrstr(sss, "%s");
3163 if (t == NULL)
3164 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3165 "contain \"%%s\"", sss);
3166 *t = 'X';
3167 t = Ustrchr(sss, '%');
3168 if (t != NULL)
3169 {
3170 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3171 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3172 "unexpected \"%%\" character", s);
3173 }
3174 }
3175
3176 log_file_path = s;
3177 }
3178
3179 /* Interpret syslog_facility into an integer argument for 'ident' param to
3180 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3181 leading "log_". */
3182
3183 if (syslog_facility_str != NULL)
3184 {
3185 int i;
3186 uschar *s = syslog_facility_str;
3187
3188 if ((Ustrlen(syslog_facility_str) >= 4) &&
3189 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3190 s += 4;
3191
3192 for (i = 0; i < syslog_list_size; i++)
3193 {
3194 if (strcmpic(s, syslog_list[i].name) == 0)
3195 {
3196 syslog_facility = syslog_list[i].value;
3197 break;
3198 }
3199 }
3200
3201 if (i >= syslog_list_size)
3202 {
3203 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3204 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3205 }
3206 }
3207
3208 /* Expand pid_file_path */
3209
3210 if (*pid_file_path != 0)
3211 {
3212 s = expand_string(pid_file_path);
3213 if (s == NULL)
3214 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3215 "\"%s\": %s", pid_file_path, expand_string_message);
3216 pid_file_path = s;
3217 }
3218
3219 /* Set default value of process_log_path */
3220
3221 if (process_log_path == NULL || *process_log_path =='\0')
3222 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3223
3224 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3225 message. */
3226
3227 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3228
3229 /* Unpick the SMTP rate limiting options, if set */
3230
3231 if (smtp_ratelimit_mail != NULL)
3232 {
3233 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3234 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3235 }
3236
3237 if (smtp_ratelimit_rcpt != NULL)
3238 {
3239 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3240 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3241 }
3242
3243 /* The qualify domains default to the primary host name */
3244
3245 if (qualify_domain_sender == NULL)
3246 qualify_domain_sender = primary_hostname;
3247 if (qualify_domain_recipient == NULL)
3248 qualify_domain_recipient = qualify_domain_sender;
3249
3250 /* Setting system_filter_user in the configuration sets the gid as well if a
3251 name is given, but a numerical value does not. */
3252
3253 if (system_filter_uid_set && !system_filter_gid_set)
3254 {
3255 struct passwd *pw = getpwuid(system_filter_uid);
3256 if (pw == NULL)
3257 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3258 (long int)system_filter_uid);
3259 system_filter_gid = pw->pw_gid;
3260 system_filter_gid_set = TRUE;
3261 }
3262
3263 /* If the errors_reply_to field is set, check that it is syntactically valid
3264 and ensure it contains a domain. */
3265
3266 if (errors_reply_to != NULL)
3267 {
3268 uschar *errmess;
3269 int start, end, domain;
3270 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3271 &start, &end, &domain, FALSE);
3272
3273 if (recipient == NULL)
3274 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,