1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2024 */
6 /* Copyright (c) University of Cambridge 1995 - 2018 */
7 /* See the file NOTICE for conditions of use and distribution. */
8 /* SPDX-License-Identifier: GPL-2.0-or-later */
10 /* Functions for reading the configuration file, and for displaying
11 overall configuration values. Thanks to Brian Candler for the original
12 implementation of the conditional .ifdef etc. */
17 # include "macro_predef.h"
20 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
23 static uschar * syslog_facility_str;
24 static void fn_smtp_receive_timeout(const uschar *, const uschar *, unsigned);
26 /*************************************************
27 * Main configuration options *
28 *************************************************/
30 /* The list of options that can be set in the main configuration file. This
31 must be in alphabetic order because it is searched by binary chop. */
33 static optionlist optionlist_config[] = {
34 { "*set_exim_group", opt_bool|opt_hidden, {&exim_gid_set} },
35 { "*set_exim_user", opt_bool|opt_hidden, {&exim_uid_set} },
36 { "*set_system_filter_group", opt_bool|opt_hidden, {&system_filter_gid_set} },
37 { "*set_system_filter_user", opt_bool|opt_hidden, {&system_filter_uid_set} },
38 { "accept_8bitmime", opt_bool, {&accept_8bitmime} },
39 { "acl_not_smtp", opt_stringptr, {&acl_not_smtp} },
40 #ifdef WITH_CONTENT_SCAN
41 { "acl_not_smtp_mime", opt_stringptr, {&acl_not_smtp_mime} },
43 { "acl_not_smtp_start", opt_stringptr, {&acl_not_smtp_start} },
44 { "acl_smtp_auth", opt_stringptr, {&acl_smtp_auth} },
45 { "acl_smtp_connect", opt_stringptr, {&acl_smtp_connect} },
46 { "acl_smtp_data", opt_stringptr, {&acl_smtp_data} },
48 { "acl_smtp_data_prdr", opt_stringptr, {&acl_smtp_data_prdr} },
51 { "acl_smtp_dkim", opt_stringptr, {&acl_smtp_dkim} },
53 { "acl_smtp_etrn", opt_stringptr, {&acl_smtp_etrn} },
54 { "acl_smtp_expn", opt_stringptr, {&acl_smtp_expn} },
55 { "acl_smtp_helo", opt_stringptr, {&acl_smtp_helo} },
56 { "acl_smtp_mail", opt_stringptr, {&acl_smtp_mail} },
57 { "acl_smtp_mailauth", opt_stringptr, {&acl_smtp_mailauth} },
58 #ifdef WITH_CONTENT_SCAN
59 { "acl_smtp_mime", opt_stringptr, {&acl_smtp_mime} },
61 { "acl_smtp_notquit", opt_stringptr, {&acl_smtp_notquit} },
62 { "acl_smtp_predata", opt_stringptr, {&acl_smtp_predata} },
63 { "acl_smtp_quit", opt_stringptr, {&acl_smtp_quit} },
64 { "acl_smtp_rcpt", opt_stringptr, {&acl_smtp_rcpt} },
66 { "acl_smtp_starttls", opt_stringptr, {&acl_smtp_starttls} },
68 { "acl_smtp_vrfy", opt_stringptr, {&acl_smtp_vrfy} },
69 #ifndef DISABLE_WELLKNOWN
70 { "acl_smtp_wellknown", opt_stringptr, {&acl_smtp_wellknown} },
72 { "add_environment", opt_stringptr, {&add_environment} },
73 { "admin_groups", opt_gidlist, {&admin_groups} },
74 { "allow_domain_literals", opt_bool, {&allow_domain_literals} },
75 { "allow_mx_to_ip", opt_bool, {&allow_mx_to_ip} },
76 { "allow_utf8_domains", opt_bool, {&allow_utf8_domains} },
77 { "auth_advertise_hosts", opt_stringptr, {&auth_advertise_hosts} },
78 { "auto_thaw", opt_time, {&auto_thaw} },
79 #ifdef WITH_CONTENT_SCAN
80 { "av_scanner", opt_stringptr, {&av_scanner} },
82 { "bi_command", opt_stringptr, {&bi_command} },
83 #ifdef EXPERIMENTAL_BRIGHTMAIL
84 { "bmi_config_file", opt_stringptr, {&bmi_config_file} },
86 { "bounce_message_file", opt_stringptr, {&bounce_message_file} },
87 { "bounce_message_text", opt_stringptr, {&bounce_message_text} },
88 { "bounce_return_body", opt_bool, {&bounce_return_body} },
89 { "bounce_return_linesize_limit", opt_mkint, {&bounce_return_linesize_limit} },
90 { "bounce_return_message", opt_bool, {&bounce_return_message} },
91 { "bounce_return_size_limit", opt_mkint, {&bounce_return_size_limit} },
92 { "bounce_sender_authentication",opt_stringptr,{&bounce_sender_authentication} },
93 { "callout_domain_negative_expire", opt_time, {&callout_cache_domain_negative_expire} },
94 { "callout_domain_positive_expire", opt_time, {&callout_cache_domain_positive_expire} },
95 { "callout_negative_expire", opt_time, {&callout_cache_negative_expire} },
96 { "callout_positive_expire", opt_time, {&callout_cache_positive_expire} },
97 { "callout_random_local_part",opt_stringptr, {&callout_random_local_part} },
98 { "check_log_inodes", opt_int, {&check_log_inodes} },
99 { "check_log_space", opt_Kint, {&check_log_space} },
100 { "check_rfc2047_length", opt_bool, {&check_rfc2047_length} },
101 { "check_spool_inodes", opt_int, {&check_spool_inodes} },
102 { "check_spool_space", opt_Kint, {&check_spool_space} },
103 { "chunking_advertise_hosts", opt_stringptr, {&chunking_advertise_hosts} },
104 { "commandline_checks_require_admin", opt_bool,{&commandline_checks_require_admin} },
105 { "daemon_smtp_port", opt_stringptr|opt_hidden, {&daemon_smtp_port} },
106 { "daemon_smtp_ports", opt_stringptr, {&daemon_smtp_port} },
107 { "daemon_startup_retries", opt_int, {&daemon_startup_retries} },
108 { "daemon_startup_sleep", opt_time, {&daemon_startup_sleep} },
109 #ifdef EXPERIMENTAL_DCC
110 { "dcc_direct_add_header", opt_bool, {&dcc_direct_add_header} },
111 { "dccifd_address", opt_stringptr, {&dccifd_address} },
112 { "dccifd_options", opt_stringptr, {&dccifd_options} },
114 { "debug_store", opt_bool, {&debug_store} },
115 { "delay_warning", opt_timelist, {&delay_warning} },
116 { "delay_warning_condition", opt_stringptr, {&delay_warning_condition} },
117 { "deliver_drop_privilege", opt_bool, {&deliver_drop_privilege} },
118 { "deliver_queue_load_max", opt_fixed, {&deliver_queue_load_max} },
119 { "delivery_date_remove", opt_bool, {&delivery_date_remove} },
120 #ifdef ENABLE_DISABLE_FSYNC
121 { "disable_fsync", opt_bool, {&disable_fsync} },
123 { "disable_ipv6", opt_bool, {&disable_ipv6} },
125 { "dkim_verify_hashes", opt_stringptr, {&dkim_verify_hashes} },
126 { "dkim_verify_keytypes", opt_stringptr, {&dkim_verify_keytypes} },
127 { "dkim_verify_min_keysizes", opt_stringptr, {&dkim_verify_min_keysizes} },
128 { "dkim_verify_minimal", opt_bool, {&dkim_verify_minimal} },
129 { "dkim_verify_signers", opt_stringptr, {&dkim_verify_signers} },
132 { "dmarc_forensic_sender", opt_stringptr, {&dmarc_forensic_sender} },
133 { "dmarc_history_file", opt_stringptr, {&dmarc_history_file} },
134 { "dmarc_tld_file", opt_stringptr, {&dmarc_tld_file} },
136 { "dns_again_means_nonexist", opt_stringptr, {&dns_again_means_nonexist} },
137 { "dns_check_names_pattern", opt_stringptr, {&check_dns_names_pattern} },
138 { "dns_cname_loops", opt_int, {&dns_cname_loops} },
139 { "dns_csa_search_limit", opt_int, {&dns_csa_search_limit} },
140 { "dns_csa_use_reverse", opt_bool, {&dns_csa_use_reverse} },
141 { "dns_dnssec_ok", opt_int, {&dns_dnssec_ok} },
142 { "dns_ipv4_lookup", opt_stringptr, {&dns_ipv4_lookup} },
143 { "dns_retrans", opt_time, {&dns_retrans} },
144 { "dns_retry", opt_int, {&dns_retry} },
145 { "dns_trust_aa", opt_stringptr, {&dns_trust_aa} },
146 { "dns_use_edns0", opt_int, {&dns_use_edns0} },
147 /* This option is now a no-op, retained for compatibility */
148 { "drop_cr", opt_bool, {&drop_cr} },
149 /*********************************************************/
150 { "dsn_advertise_hosts", opt_stringptr, {&dsn_advertise_hosts} },
151 { "dsn_from", opt_stringptr, {&dsn_from} },
152 { "envelope_to_remove", opt_bool, {&envelope_to_remove} },
153 { "errors_copy", opt_stringptr, {&errors_copy} },
154 { "errors_reply_to", opt_stringptr, {&errors_reply_to} },
155 #ifndef DISABLE_EVENT
156 { "event_action", opt_stringptr, {&event_action} },
158 { "exim_group", opt_gid, {&exim_gid} },
159 { "exim_path", opt_stringptr, {&exim_path} },
160 { "exim_user", opt_uid, {&exim_uid} },
161 { "exim_version", opt_stringptr, {&version_string} },
162 { "extra_local_interfaces", opt_stringptr, {&extra_local_interfaces} },
163 { "extract_addresses_remove_arguments", opt_bool, {&extract_addresses_remove_arguments} },
164 { "finduser_retries", opt_int, {&finduser_retries} },
165 { "freeze_tell", opt_stringptr, {&freeze_tell} },
166 { "gecos_name", opt_stringptr, {&gecos_name} },
167 { "gecos_pattern", opt_stringptr, {&gecos_pattern} },
169 { "gnutls_allow_auto_pkcs11", opt_bool, {&gnutls_allow_auto_pkcs11} },
170 { "gnutls_compat_mode", opt_bool, {&gnutls_compat_mode} },
172 { "header_line_maxsize", opt_int, {&header_line_maxsize} },
173 { "header_maxsize", opt_int, {&header_maxsize} },
174 { "headers_charset", opt_stringptr, {&headers_charset} },
175 { "helo_accept_junk_hosts", opt_stringptr, {&helo_accept_junk_hosts} },
176 { "helo_allow_chars", opt_stringptr, {&helo_allow_chars} },
177 { "helo_lookup_domains", opt_stringptr, {&helo_lookup_domains} },
178 { "helo_try_verify_hosts", opt_stringptr, {&helo_try_verify_hosts} },
179 { "helo_verify_hosts", opt_stringptr, {&helo_verify_hosts} },
180 { "hold_domains", opt_stringptr, {&hold_domains} },
181 { "host_lookup", opt_stringptr, {&host_lookup} },
182 { "host_lookup_order", opt_stringptr, {&host_lookup_order} },
183 { "host_reject_connection", opt_stringptr, {&host_reject_connection} },
184 { "hosts_connection_nolog", opt_stringptr, {&hosts_connection_nolog} },
186 { "hosts_proxy", opt_stringptr, {&hosts_proxy} },
189 { "hosts_require_alpn", opt_stringptr, {&hosts_require_alpn} },
191 { "hosts_require_helo", opt_stringptr, {&hosts_require_helo} },
192 { "hosts_treat_as_local", opt_stringptr, {&hosts_treat_as_local} },
193 #ifdef EXPERIMENTAL_XCLIENT
194 { "hosts_xclient", opt_stringptr, {&hosts_xclient} },
197 { "ibase_servers", opt_stringptr, {&ibase_servers} },
199 { "ignore_bounce_errors_after", opt_time, {&ignore_bounce_errors_after} },
200 { "ignore_fromline_hosts", opt_stringptr, {&ignore_fromline_hosts} },
201 { "ignore_fromline_local", opt_bool, {&ignore_fromline_local} },
202 { "keep_environment", opt_stringptr, {&keep_environment} },
203 { "keep_malformed", opt_time, {&keep_malformed} },
205 { "ldap_ca_cert_dir", opt_stringptr, {&eldap_ca_cert_dir} },
206 { "ldap_ca_cert_file", opt_stringptr, {&eldap_ca_cert_file} },
207 { "ldap_cert_file", opt_stringptr, {&eldap_cert_file} },
208 { "ldap_cert_key", opt_stringptr, {&eldap_cert_key} },
209 { "ldap_cipher_suite", opt_stringptr, {&eldap_cipher_suite} },
210 { "ldap_default_servers", opt_stringptr, {&eldap_default_servers} },
211 { "ldap_require_cert", opt_stringptr, {&eldap_require_cert} },
212 { "ldap_start_tls", opt_bool, {&eldap_start_tls} },
213 { "ldap_version", opt_int, {&eldap_version} },
215 #ifndef DISABLE_ESMTP_LIMITS
216 { "limits_advertise_hosts", opt_stringptr, {&limits_advertise_hosts} },
218 { "local_from_check", opt_bool, {&local_from_check} },
219 { "local_from_prefix", opt_stringptr, {&local_from_prefix} },
220 { "local_from_suffix", opt_stringptr, {&local_from_suffix} },
221 { "local_interfaces", opt_stringptr, {&local_interfaces} },
222 #ifdef HAVE_LOCAL_SCAN
223 { "local_scan_timeout", opt_time, {&local_scan_timeout} },
225 { "local_sender_retain", opt_bool, {&local_sender_retain} },
226 { "localhost_number", opt_stringptr, {&host_number_string} },
227 { "log_file_path", opt_stringptr, {&log_file_path} },
228 { "log_selector", opt_stringptr, {&log_selector_string} },
229 { "log_timezone", opt_bool, {&log_timezone} },
230 { "lookup_open_max", opt_int, {&lookup_open_max} },
231 { "max_username_length", opt_int, {&max_username_length} },
232 { "message_body_newlines", opt_bool, {&message_body_newlines} },
233 { "message_body_visible", opt_mkint, {&message_body_visible} },
234 { "message_id_header_domain", opt_stringptr, {&message_id_domain} },
235 { "message_id_header_text", opt_stringptr, {&message_id_text} },
236 { "message_logs", opt_bool, {&message_logs} },
237 { "message_size_limit", opt_stringptr, {&message_size_limit} },
238 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
239 { "move_frozen_messages", opt_bool, {&move_frozen_messages} },
241 { "mua_wrapper", opt_bool, {&mua_wrapper} },
243 { "mysql_servers", opt_stringptr, {&mysql_servers} },
245 { "never_users", opt_uidlist, {&never_users} },
246 { "notifier_socket", opt_stringptr, {¬ifier_socket} },
248 { "openssl_options", opt_stringptr, {&openssl_options} },
251 { "oracle_servers", opt_stringptr, {&oracle_servers} },
253 { "panic_coredump", opt_bool, {&panic_coredump} },
254 { "percent_hack_domains", opt_stringptr, {&percent_hack_domains} },
256 { "perl_at_start", opt_bool, {&opt_perl_at_start} },
257 { "perl_startup", opt_stringptr, {&opt_perl_startup} },
258 { "perl_taintmode", opt_bool, {&opt_perl_taintmode} },
261 { "pgsql_servers", opt_stringptr, {&pgsql_servers} },
263 { "pid_file_path", opt_stringptr, {&pid_file_path} },
264 { "pipelining_advertise_hosts", opt_stringptr, {&pipelining_advertise_hosts} },
265 #ifndef DISABLE_PIPE_CONNECT
266 { "pipelining_connect_advertise_hosts", opt_stringptr,
267 {&pipe_connect_advertise_hosts} },
270 { "prdr_enable", opt_bool, {&prdr_enable} },
272 { "preserve_message_logs", opt_bool, {&preserve_message_logs} },
273 { "primary_hostname", opt_stringptr, {&primary_hostname} },
274 { "print_topbitchars", opt_bool, {&print_topbitchars} },
275 { "process_log_path", opt_stringptr, {&process_log_path} },
276 { "prod_requires_admin", opt_bool, {&prod_requires_admin} },
278 { "proxy_protocol_timeout", opt_time, {&proxy_protocol_timeout} },
280 { "qualify_domain", opt_stringptr, {&qualify_domain_sender} },
281 { "qualify_recipient", opt_stringptr, {&qualify_domain_recipient} },
282 { "queue_domains", opt_stringptr, {&queue_domains} },
283 #ifndef DISABLE_QUEUE_RAMP
284 { "queue_fast_ramp", opt_bool, {&queue_fast_ramp} },
286 { "queue_list_requires_admin",opt_bool, {&queue_list_requires_admin} },
287 { "queue_only", opt_bool, {&queue_only} },
288 { "queue_only_file", opt_stringptr, {&queue_only_file} },
289 { "queue_only_load", opt_fixed, {&queue_only_load} },
290 { "queue_only_load_latch", opt_bool, {&queue_only_load_latch} },
291 { "queue_only_override", opt_bool, {&queue_only_override} },
292 { "queue_run_in_order", opt_bool, {&queue_run_in_order} },
293 { "queue_run_max", opt_stringptr, {&queue_run_max} },
294 { "queue_smtp_domains", opt_stringptr, {&queue_smtp_domains} },
295 { "receive_timeout", opt_time, {&receive_timeout} },
296 { "received_header_text", opt_stringptr, {&received_header_text} },
297 { "received_headers_max", opt_int, {&received_headers_max} },
298 { "recipient_unqualified_hosts", opt_stringptr, {&recipient_unqualified_hosts} },
299 { "recipients_max", opt_stringptr, {&recipients_max} },
300 { "recipients_max_reject", opt_bool, {&recipients_max_reject} },
302 { "redis_servers", opt_stringptr, {&redis_servers} },
304 { "remote_max_parallel", opt_int, {&remote_max_parallel} },
305 { "remote_sort_domains", opt_stringptr, {&remote_sort_domains} },
306 { "retry_data_expire", opt_time, {&retry_data_expire} },
307 { "retry_interval_max", opt_time, {&retry_interval_max} },
308 { "return_path_remove", opt_bool, {&return_path_remove} },
309 { "return_size_limit", opt_mkint|opt_hidden, {&bounce_return_size_limit} },
310 { "rfc1413_hosts", opt_stringptr, {&rfc1413_hosts} },
311 { "rfc1413_query_timeout", opt_time, {&rfc1413_query_timeout} },
312 { "sender_unqualified_hosts", opt_stringptr, {&sender_unqualified_hosts} },
313 { "slow_lookup_log", opt_int, {&slow_lookup_log} },
314 { "smtp_accept_keepalive", opt_bool, {&smtp_accept_keepalive} },
315 { "smtp_accept_max", opt_int, {&smtp_accept_max} },
316 { "smtp_accept_max_nonmail", opt_int, {&smtp_accept_max_nonmail} },
317 { "smtp_accept_max_nonmail_hosts", opt_stringptr, {&smtp_accept_max_nonmail_hosts} },
318 { "smtp_accept_max_per_connection", opt_stringptr, {&smtp_accept_max_per_connection} },
319 { "smtp_accept_max_per_host", opt_stringptr, {&smtp_accept_max_per_host} },
320 { "smtp_accept_queue", opt_int, {&smtp_accept_queue} },
321 { "smtp_accept_queue_per_connection", opt_int, {&smtp_accept_queue_per_connection} },
322 { "smtp_accept_reserve", opt_int, {&smtp_accept_reserve} },
323 { "smtp_active_hostname", opt_stringptr, {&raw_active_hostname} },
324 { "smtp_backlog_monitor", opt_int, {&smtp_backlog_monitor} },
325 { "smtp_banner", opt_stringptr, {&smtp_banner} },
326 { "smtp_check_spool_space", opt_bool, {&smtp_check_spool_space} },
327 { "smtp_connect_backlog", opt_int, {&smtp_connect_backlog} },
328 { "smtp_enforce_sync", opt_bool, {&smtp_enforce_sync} },
329 { "smtp_etrn_command", opt_stringptr, {&smtp_etrn_command} },
330 { "smtp_etrn_serialize", opt_bool, {&smtp_etrn_serialize} },
331 { "smtp_load_reserve", opt_fixed, {&smtp_load_reserve} },
332 { "smtp_max_synprot_errors", opt_int, {&smtp_max_synprot_errors} },
333 { "smtp_max_unknown_commands",opt_int, {&smtp_max_unknown_commands} },
334 { "smtp_ratelimit_hosts", opt_stringptr, {&smtp_ratelimit_hosts} },
335 { "smtp_ratelimit_mail", opt_stringptr, {&smtp_ratelimit_mail} },
336 { "smtp_ratelimit_rcpt", opt_stringptr, {&smtp_ratelimit_rcpt} },
337 { "smtp_receive_timeout", opt_func, {.fn = &fn_smtp_receive_timeout} },
338 { "smtp_reserve_hosts", opt_stringptr, {&smtp_reserve_hosts} },
339 { "smtp_return_error_details",opt_bool, {&smtp_return_error_details} },
341 { "smtputf8_advertise_hosts", opt_stringptr, {&smtputf8_advertise_hosts} },
343 #ifdef WITH_CONTENT_SCAN
344 { "spamd_address", opt_stringptr, {&spamd_address} },
347 { "spf_guess", opt_stringptr, {&spf_guess} },
348 { "spf_smtp_comment_template",opt_stringptr, {&spf_smtp_comment_template} },
350 { "split_spool_directory", opt_bool, {&split_spool_directory} },
351 { "spool_directory", opt_stringptr, {&spool_directory} },
352 { "spool_wireformat", opt_bool, {&spool_wireformat} },
354 { "sqlite_dbfile", opt_stringptr, {&sqlite_dbfile} },
355 { "sqlite_lock_timeout", opt_int, {&sqlite_lock_timeout} },
357 { "strict_acl_vars", opt_bool, {&strict_acl_vars} },
358 { "strip_excess_angle_brackets", opt_bool, {&strip_excess_angle_brackets} },
359 { "strip_trailing_dot", opt_bool, {&strip_trailing_dot} },
360 { "syslog_duplication", opt_bool, {&syslog_duplication} },
361 { "syslog_facility", opt_stringptr, {&syslog_facility_str} },
362 { "syslog_pid", opt_bool, {&syslog_pid} },
363 { "syslog_processname", opt_stringptr, {&syslog_processname} },
364 { "syslog_timestamp", opt_bool, {&syslog_timestamp} },
365 { "system_filter", opt_stringptr, {&system_filter} },
366 { "system_filter_directory_transport", opt_stringptr,{&system_filter_directory_transport} },
367 { "system_filter_file_transport",opt_stringptr,{&system_filter_file_transport} },
368 { "system_filter_group", opt_gid, {&system_filter_gid} },
369 { "system_filter_pipe_transport",opt_stringptr,{&system_filter_pipe_transport} },
370 { "system_filter_reply_transport",opt_stringptr,{&system_filter_reply_transport} },
371 { "system_filter_user", opt_uid, {&system_filter_uid} },
372 { "tcp_nodelay", opt_bool, {&tcp_nodelay} },
373 #ifdef USE_TCP_WRAPPERS
374 { "tcp_wrappers_daemon_name", opt_stringptr, {&tcp_wrappers_daemon_name} },
376 { "timeout_frozen_after", opt_time, {&timeout_frozen_after} },
377 { "timezone", opt_stringptr, {&timezone_string} },
378 { "tls_advertise_hosts", opt_stringptr, {&tls_advertise_hosts} },
380 { "tls_alpn", opt_stringptr, {&tls_alpn} },
381 { "tls_certificate", opt_stringptr, {&tls_certificate} },
382 { "tls_crl", opt_stringptr, {&tls_crl} },
383 { "tls_dh_max_bits", opt_int, {&tls_dh_max_bits} },
384 { "tls_dhparam", opt_stringptr, {&tls_dhparam} },
385 { "tls_eccurve", opt_stringptr, {&tls_eccurve} },
386 # ifndef DISABLE_OCSP
387 { "tls_ocsp_file", opt_stringptr, {&tls_ocsp_file} },
389 { "tls_on_connect_ports", opt_stringptr, {&tls_in.on_connect_ports} },
390 { "tls_privatekey", opt_stringptr, {&tls_privatekey} },
391 { "tls_remember_esmtp", opt_bool, {&tls_remember_esmtp} },
392 { "tls_require_ciphers", opt_stringptr, {&tls_require_ciphers} },
393 # ifndef DISABLE_TLS_RESUME
394 { "tls_resumption_hosts", opt_stringptr, {&tls_resumption_hosts} },
396 { "tls_try_verify_hosts", opt_stringptr, {&tls_try_verify_hosts} },
397 { "tls_verify_certificates", opt_stringptr, {&tls_verify_certificates} },
398 { "tls_verify_hosts", opt_stringptr, {&tls_verify_hosts} },
400 { "trusted_groups", opt_gidlist, {&trusted_groups} },
401 { "trusted_users", opt_uidlist, {&trusted_users} },
402 { "unknown_login", opt_stringptr, {&unknown_login} },
403 { "unknown_username", opt_stringptr, {&unknown_username} },
404 { "untrusted_set_sender", opt_stringptr, {&untrusted_set_sender} },
405 { "uucp_from_pattern", opt_stringptr, {&uucp_from_pattern} },
406 { "uucp_from_sender", opt_stringptr, {&uucp_from_sender} },
407 { "warn_message_file", opt_stringptr, {&warn_message_file} },
408 #ifndef DISABLE_WELLKNOWN
409 { "wellknown_advertise_hosts",opt_stringptr, {&wellknown_advertise_hosts} },
411 { "write_rejectlog", opt_bool, {&write_rejectlog} },
415 static int optionlist_config_size = nelem(optionlist_config);
422 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags) {/*Dummy*/}
427 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
433 uschar buf[EXIM_DRIVERNAME_MAX];
435 options_from_list(optionlist_auths, optionlist_auths_size,
436 US"AUTHENTICATORS", NULL);
438 for (driver_info * di = (driver_info *)auths_available; di; di = di->next)
440 auth_info * ai = (auth_info *)di;
442 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", di->driver_name);
443 builtin_macro_create(buf);
444 options_from_list(di->options, (unsigned)*di->options_count,
445 US"AUTHENTICATOR", di->driver_name);
447 if (ai->macros_create) (ai->macros_create)();
452 options_logging(void)
454 uschar buf[EXIM_DRIVERNAME_MAX];
456 for (bit_table * bp = log_options; bp < log_options + log_options_count; bp++)
458 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
459 builtin_macro_create(buf);
464 #else /*!MACRO_PREDEF*/
466 extern char **environ;
468 static void save_config_line(const uschar* line);
469 static void save_config_position(const uschar *file, int line);
470 static void print_config(BOOL admin, BOOL terse);
473 #define CSTATE_STACK_SIZE 10
475 const uschar *config_directory = NULL;
478 /* Structure for chain (stack) of .included files */
480 typedef struct config_file_item {
481 struct config_file_item *next;
482 const uschar *filename;
483 const uschar *directory;
488 /* Structure for chain of configuration lines (-bP config) */
490 typedef struct config_line_item {
491 struct config_line_item *next;
495 static config_line_item* config_lines;
497 /* Structure of table of conditional words and their state transitions */
499 typedef struct cond_item {
507 /* Structure of table of syslog facility names and values */
509 typedef struct syslog_fac_item {
515 static const uschar * const hidden = US"<value not displayable>";
517 /* Static variables */
519 static config_file_item *config_file_stack = NULL; /* For includes */
521 static uschar *syslog_facility_str = NULL;
522 static uschar next_section[24];
523 static uschar time_buffer[24];
525 /* State variables for conditional loading (.ifdef / .else / .endif) */
527 static int cstate = 0;
528 static int cstate_stack_ptr = -1;
529 static int cstate_stack[CSTATE_STACK_SIZE];
531 /* Table of state transitions for handling conditional inclusions. There are
532 four possible state transitions:
536 .elifdef true (or .else)
539 .endif just causes the previous cstate to be popped off the stack */
541 static int next_cstate[3][4] =
543 /* State 0: reading from file, or reading until next .else or .endif */
545 /* State 1: condition failed, skipping until next .else or .endif */
547 /* State 2: skipping until .endif */
551 /* Table of conditionals and the states to set. For each name, there are four
552 values: the length of the name (to save computing it each time), the state to
553 set if a macro was found in the line, the state to set if a macro was not found
554 in the line, and a stack manipulation setting which is:
556 -1 pull state value off the stack
557 0 don't alter the stack
558 +1 push value onto stack, before setting new state
561 static cond_item cond_list[] = {
562 { US"ifdef", 5, 0, 1, 1 },
563 { US"ifndef", 6, 1, 0, 1 },
564 { US"elifdef", 7, 2, 3, 0 },
565 { US"elifndef", 8, 3, 2, 0 },
566 { US"else", 4, 2, 2, 0 },
567 { US"endif", 5, 0, 0, -1 }
570 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
572 /* Table of syslog facility names and their values */
574 static syslog_fac_item syslog_list[] = {
575 { US"mail", LOG_MAIL },
576 { US"user", LOG_USER },
577 { US"news", LOG_NEWS },
578 { US"uucp", LOG_UUCP },
579 { US"local0", LOG_LOCAL0 },
580 { US"local1", LOG_LOCAL1 },
581 { US"local2", LOG_LOCAL2 },
582 { US"local3", LOG_LOCAL3 },
583 { US"local4", LOG_LOCAL4 },
584 { US"local5", LOG_LOCAL5 },
585 { US"local6", LOG_LOCAL6 },
586 { US"local7", LOG_LOCAL7 },
587 { US"daemon", LOG_DAEMON }
590 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
593 #define opt_fn_print BIT(0)
594 #define opt_fn_print_label BIT(1)
597 /*************************************************
598 * Find the name of an option *
599 *************************************************/
601 /* This function is to aid debugging. Various functions take arguments that are
602 pointer variables in the options table or in option tables for various drivers.
603 For debugging output, it is useful to be able to find the name of the option
604 which is currently being processed. This function finds it, if it exists, by
605 searching the table(s) for a value with the given content.
607 Arguments: a value that is presumed to be in the table above
608 Returns: the option name, or an empty string
612 readconf_find_option(void * listptr)
614 uschar * list = * USS listptr;
615 const uschar * name = NULL, * drname = NULL;
617 for (optionlist * o = optionlist_config; /* main-config options */
618 o < optionlist_config + optionlist_config_size; o++)
619 if (listptr == o->v.value)
623 for (const driver_instance * rd = (driver_instance *)routers;
624 rd; rd = rd->next) if (Ustrcmp(rd->name, router_name) == 0)
626 const router_instance * r = (router_instance *)rd;
627 const router_info * ri = (router_info *)rd->info;
629 /* Check for a listptr match first */
631 for (optionlist * o = optionlist_routers; /* generic options */
632 o < optionlist_routers + optionlist_routers_size; o++)
633 if ( (o->type & opt_mask) == opt_stringptr
634 && listptr == CS r + o->v.offset)
637 for (optionlist * o = ri->drinfo.options; /* private options */
638 o < ri->drinfo.options + *ri->drinfo.options_count; o++)
639 if ( (o->type & opt_mask) == opt_stringptr
640 && listptr == CS rd->options_block + o->v.offset)
643 /* Check for a list addr match, unless null */
647 for (optionlist * o = optionlist_routers; /* generic options */
648 o < optionlist_routers + optionlist_routers_size; o++)
649 if ( (o->type & opt_mask) == opt_stringptr
650 && list == * USS(CS r + o->v.offset))
652 return string_sprintf("DUP: %s %s vs. %s %s",
653 drname, name, rd->name, o->name);
655 { name = US o->name; drname = rd->name; }
657 for (optionlist * o = ri->drinfo.options; /* private options */
658 o < ri->drinfo.options + *ri->drinfo.options_count; o++)
659 if ( (o->type & opt_mask) == opt_stringptr
660 && list == * USS(CS rd->options_block + o->v.offset))
662 return string_sprintf("DUP: %s %s vs. %s %s",
663 drname, name, rd->name, o->name);
665 { name = US o->name; drname = rd->name; }
669 for (transport_instance * t = transports; t; t = t->drinst.next)
670 if (Ustrcmp(t->drinst.name, transport_name) == 0)
672 const transport_info * ti = t->drinst.info;
674 /* Check for a listptr match first */
676 for (optionlist * o = optionlist_transports; /* generic options */
677 o < optionlist_transports + optionlist_transports_size; o++)
678 if ( (o->type & opt_mask) == opt_stringptr
679 && listptr == CS t + o->v.offset)
682 for (optionlist * o = ti->drinfo.options; /* private options */
683 o < ti->drinfo.options + *ti->drinfo.options_count; o++)
684 if ( (o->type & opt_mask) == opt_stringptr
685 && listptr == CS t->drinst.options_block + o->v.offset)
688 /* Check for a list addr match, unless null */
692 for (optionlist * o = optionlist_transports; /* generic options */
693 o < optionlist_transports + optionlist_transports_size; o++)
694 if ( (o->type & opt_mask) == opt_stringptr
695 && list == * USS(CS t + o->v.offset))
697 return string_sprintf("DUP: %s %s vs. %s %s",
698 drname, name, t->drinst.name, o->name);
700 { name = US o->name; drname = t->drinst.name; }
702 for (optionlist * o = ti->drinfo.options; /* private options */
703 o < ti->drinfo.options + *ti->drinfo.options_count; o++)
704 if ( (o->type & opt_mask) == opt_stringptr
705 && list == * USS(CS t->drinst.options_block + o->v.offset))
707 return string_sprintf("DUP: %s %s vs. %s %s",
708 drname, name, t->drinst.name, o->name);
710 { name = US o->name; drname = t->drinst.name; }
713 return name ? name : US"";
719 /*************************************************
720 * Deal with an assignment to a macro *
721 *************************************************/
723 /* We have a new definition; append to the list.
726 name Name of the macro; will be copied
727 val Expansion result for the macro; will be copied
731 macro_create(const uschar * name, const uschar * val, BOOL command_line)
733 macro_item * m = store_get(sizeof(macro_item), GET_UNTAINTED);
735 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
737 m->command_line = command_line;
738 m->namelen = Ustrlen(name);
739 m->replen = Ustrlen(val);
740 m->name = string_copy(name);
741 m->replacement = string_copy(val);
753 /* This function is called when a line that starts with an upper case letter is
754 encountered. The argument "line" should contain a complete logical line, and
755 start with the first letter of the macro name. The macro name and the
756 replacement text are extracted and stored. Redefinition of existing,
757 non-command line, macros is permitted using '==' instead of '='.
760 s points to the start of the logical line
762 Returns: FALSE iff fatal error
766 macro_read_assignment(uschar *s)
768 uschar name[EXIM_DRIVERNAME_MAX];
773 while (isalnum(*s) || *s == '_')
775 if (namelen >= sizeof(name) - 1)
777 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
778 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
781 name[namelen++] = *s++;
785 Uskip_whitespace(&s);
788 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
797 Uskip_whitespace(&s);
799 /* If an existing macro of the same name was defined on the command line, we
800 just skip this definition. It's an error to attempt to redefine a macro without
801 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
802 It is also an error to define a macro whose name begins with the name of a
803 previously defined macro. This is the requirement that make using a tree
804 for macros hard; we must check all macros for the substring. Perhaps a
805 sorted list, and a bsearch, would work?
806 Note: it is documented that the other way round works. */
808 for (m = macros; m; m = m->next)
810 if (Ustrcmp(m->name, name) == 0)
812 if (!m->command_line && !redef)
814 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
815 "defined (use \"==\" if you want to redefine it)", name);
821 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
823 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
824 "a macro because previously defined macro \"%s\" is a substring",
829 /* We cannot have this test, because it is documented that a substring
830 macro is permitted (there is even an example).
832 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
833 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
834 * "a macro because it is a substring of previously defined macro \"%s\"",
839 /* Check for an overriding command-line definition. */
841 if (m && m->command_line) return TRUE;
843 /* Redefinition must refer to an existing macro. */
848 m->replen = Ustrlen(s);
849 m->replacement = string_copy(s);
853 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
858 /* We have a new definition. */
860 (void) macro_create(name, s, FALSE);
868 /* Process line for macros. The line is in big_buffer starting at offset len.
869 Expand big_buffer if needed. Handle definitions of new macros, and
870 macro expansions, rewriting the line in the buffer.
873 len Offset in buffer of start of line
874 newlen Pointer to offset of end of line, updated on return
875 macro_found Pointer to return that a macro was expanded
877 Return: pointer to first nonblank char in line
881 macros_expand(int len, int * newlen, BOOL * macro_found)
883 uschar * ss = big_buffer + len;
886 /* Find the true start of the physical line - leading spaces are always
889 Uskip_whitespace(&ss);
891 /* Process the physical line for macros. If this is the start of the logical
892 line, skip over initial text at the start of the line if it starts with an
893 upper case character followed by a sequence of name characters and an equals
894 sign, because that is the definition of a new macro, and we don't do
895 replacement therein. */
898 if (len == 0 && isupper(*s))
900 while (isalnum(*s) || *s == '_') s++;
901 if (Uskip_whitespace(&s) != '=') s = ss; /* Not a macro definition */
904 /* Skip leading chars which cannot start a macro name, to avoid multiple
905 pointless rescans in Ustrstr calls. */
907 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
909 /* For each defined macro, scan the line (from after XXX= if present),
910 replacing all occurrences of the macro. */
912 *macro_found = FALSE;
913 if (*s) for (macro_item * m = *s == '_' ? macros : macros_user; m; m = m->next)
918 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
922 while ((p = Ustrstr(t, m->name)) != NULL)
926 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
927 m->name, (int) Ustrlen(ss)-1, ss);
928 /* Expand the buffer if necessary */
930 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
932 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
933 uschar *newbuffer = store_malloc(newsize);
934 memcpy(newbuffer, big_buffer, *newlen + 1);
935 p = newbuffer + (p - big_buffer);
936 s = newbuffer + (s - big_buffer);
937 ss = newbuffer + (ss - big_buffer);
938 t = newbuffer + (t - big_buffer);
939 big_buffer_size = newsize;
940 store_free(big_buffer);
941 big_buffer = newbuffer;
944 /* Shuffle the remaining characters up or down in the buffer before
945 copying in the replacement text. Don't rescan the replacement for this
949 if ((moveby = m->replen - m->namelen) != 0)
951 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
954 Ustrncpy(p, m->replacement, m->replen);
956 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
961 /* An empty macro replacement at the start of a line could mean that ss no
962 longer points to the first non-blank character. */
964 Uskip_whitespace(&ss);
968 /*************************************************
969 * Read configuration line *
970 *************************************************/
972 /* A logical line of text is read from the configuration file into the big
973 buffer, taking account of macros, .includes, and continuations. The size of
974 big_buffer is increased if necessary. The count of configuration lines is
975 maintained. Physical input lines starting with # (ignoring leading white space,
976 and after macro replacement) and empty logical lines are always ignored.
977 Leading and trailing spaces are removed.
979 If we hit a line of the form "begin xxxx", the xxxx is placed in the
980 next_section vector, and the function returns NULL, indicating the end of a
981 configuration section. On end-of-file, NULL is returned with next_section
986 Returns: a pointer to the first non-blank in the line,
987 or NULL if eof or end of section is reached
991 get_config_line(void)
993 int startoffset = 0; /* To first non-blank char in logical line */
994 int len = 0; /* Of logical line so far */
999 /* Loop for handling continuation lines, skipping comments, and dealing with
1004 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
1006 if (config_file_stack != NULL) /* EOF inside .include */
1008 (void)fclose(config_file);
1009 config_file = config_file_stack->file;
1010 config_filename = config_file_stack->filename;
1011 config_directory = config_file_stack->directory;
1012 config_lineno = config_file_stack->lineno;
1013 config_file_stack = config_file_stack->next;
1015 save_config_position(config_filename, config_lineno);
1019 /* EOF at top level */
1021 if (cstate_stack_ptr >= 0)
1022 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1023 "Unexpected end of configuration file: .endif missing");
1025 if (len != 0) break; /* EOF after continuation */
1026 next_section[0] = 0; /* EOF at start of logical line */
1031 newlen = len + Ustrlen(big_buffer + len);
1033 if (config_lines && config_lineno == 1)
1034 save_config_position(config_filename, config_lineno);
1036 /* Handle pathologically long physical lines - yes, it did happen - by
1037 extending big_buffer at this point. The code also copes with very long
1040 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
1043 big_buffer_size += BIG_BUFFER_SIZE;
1044 newbuffer = store_malloc(big_buffer_size);
1046 /* This use of strcpy is OK because we know that the string in the old
1047 buffer is shorter than the new buffer. */
1049 Ustrcpy(newbuffer, big_buffer);
1050 store_free(big_buffer);
1051 big_buffer = newbuffer;
1052 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
1054 newlen += Ustrlen(big_buffer + newlen);
1057 ss = macros_expand(len, &newlen, ¯o_found);
1059 /* Check for comment lines - these are physical lines. */
1061 if (*ss == '#') continue;
1063 /* Handle conditionals, which are also applied to physical lines. Conditions
1064 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
1065 expansion occurred on the rest of the line. A preliminary test for the leading
1066 '.' saves effort on most lines. */
1072 /* Search the list of conditional directives */
1074 for (i = 0; i < cond_list_size; i++)
1077 cond_item *c = cond_list+i;
1078 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
1080 /* The following character must be white space or end of string */
1082 n = ss[1 + c->namelen];
1083 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
1085 /* .ifdef and .ifndef push the current state onto the stack, then set
1086 a new one from the table. Stack overflow is an error */
1090 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
1091 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1092 ".%s nested too deeply", c->name);
1093 cstate_stack[++cstate_stack_ptr] = cstate;
1094 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
1097 /* For any of the others, stack underflow is an error. The next state
1098 comes either from the stack (.endif) or from the table. */
1102 if (cstate_stack_ptr < 0)
1103 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1104 ".%s without matching .ifdef", c->name);
1105 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1106 next_cstate[cstate][macro_found? c->action1 : c->action2];
1109 /* Having dealt with a directive, break the loop */
1114 /* If we have handled a conditional directive, continue with the next
1115 physical line. Otherwise, fall through. */
1117 if (i < cond_list_size) continue;
1120 /* If the conditional state is not 0 (actively using these lines), ignore
1123 if (cstate != 0) continue; /* Conditional skip */
1125 /* Handle .include lines - these are also physical lines. */
1127 if (Ustrncmp(ss, ".include", 8) == 0 &&
1129 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1132 int include_if_exists = isspace(ss[8]) ? 0 : 10;
1133 config_file_item *save;
1134 struct stat statbuf;
1136 ss += 9 + include_if_exists;
1137 Uskip_whitespace(&ss);
1138 t = ss + Ustrlen(ss);
1139 while (t > ss && isspace(t[-1])) t--;
1140 if (*ss == '\"' && t[-1] == '\"')
1147 /* We allow relative file names. For security reasons currently
1148 relative names not allowed with .include_if_exists. For .include_if_exists
1149 we need to check the permissions/ownership of the containing folder */
1151 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1152 "absolute path \"%s\"", ss);
1155 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1156 ss = string_from_gstring(g);
1159 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1162 save_config_position(config_filename, config_lineno);
1163 save = store_get(sizeof(config_file_item), GET_UNTAINTED);
1164 save->next = config_file_stack;
1165 config_file_stack = save;
1166 save->file = config_file;
1167 save->filename = config_filename;
1168 save->directory = config_directory;
1169 save->lineno = config_lineno;
1171 if (!(config_file = Ufopen(ss, "rb")))
1172 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1173 "configuration file %s", ss);
1175 config_filename = string_copy(ss);
1176 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1181 /* If this is the start of the logical line, remember where the non-blank
1182 data starts. Otherwise shuffle down continuation lines to remove leading
1186 startoffset = ss - big_buffer;
1189 s = big_buffer + len;
1192 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1197 /* Accept the new addition to the line. Remove trailing white space. */
1200 while (len > 0 && isspace(big_buffer[len-1])) len--;
1201 big_buffer[len] = 0;
1203 /* We are done if the line does not end in backslash and contains some data.
1204 Empty logical lines are ignored. For continuations, remove the backslash and
1205 go round the loop to read the continuation line. */
1209 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1210 big_buffer[--len] = 0; /* Remove backslash */
1212 } /* Loop for reading multiple physical lines */
1214 /* We now have a logical line. Test for the end of a configuration section (or,
1215 more accurately, for the start of the next section). Place the name of the next
1216 section in next_section, and return NULL. If the name given is longer than
1217 next_section, truncate it. It will be unrecognized later, because all the known
1218 section names do fit. Leave space for pluralizing. */
1220 s = big_buffer + startoffset; /* First non-space character */
1223 save_config_line(s);
1225 if (strncmpic(s, US"begin ", 6) == 0)
1228 Uskip_whitespace(&s);
1229 if (big_buffer + len - s > sizeof(next_section) - 2)
1230 s[sizeof(next_section) - 2] = 0;
1231 Ustrcpy(next_section, s);
1235 /* Return the first non-blank character. */
1242 /*************************************************
1244 *************************************************/
1246 /* The yield is the pointer to the next uschar. Names longer than the
1247 output space are silently truncated. This function is also used from acl.c when
1251 name where to put the name
1255 Returns: new input pointer
1259 readconf_readname(uschar * name, int len, const uschar * s)
1262 BOOL broken = FALSE;
1264 if (isalpha(Uskip_whitespace(&s)))
1265 while (isalnum(*s) || *s == '_')
1267 if (p < len-1) name[p++] = *s;
1277 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1278 "exim item name too long (>%d), unable to use \"%s\" (truncated)",
1281 Uskip_whitespace(&s);
1288 /*************************************************
1289 * Read a time value *
1290 *************************************************/
1292 /* This function is also called from outside, to read argument
1293 time values. The format of a time value is:
1295 [<n>w][<n>d][<n>h][<n>m][<n>s]
1297 as long as at least one is present. If a format error is encountered,
1298 return a negative value. The value must be terminated by the given
1303 terminator required terminating character
1304 return_msec if TRUE, allow fractional seconds and return milliseconds
1306 Returns: the time value, or -1 on syntax error
1307 value is seconds if return_msec is FALSE
1308 value is milliseconds if return_msec is TRUE
1312 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1320 if (!isdigit(*s)) return -1;
1321 (void)sscanf(CCS s, "%d%n", &value, &count);
1326 case 'w': value *= 7;
1327 case 'd': value *= 24;
1328 case 'h': value *= 60;
1329 case 'm': value *= 60;
1334 if (!return_msec) return -1;
1335 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1337 if (*s++ != 's') return -1;
1338 yield += (int)(fraction * 1000.0);
1344 if (return_msec) value *= 1000;
1346 if (*s == terminator) return yield;
1348 /* Control never reaches here. */
1353 /*************************************************
1354 * Read a fixed point value *
1355 *************************************************/
1357 /* The value is returned *1000
1361 terminator required terminator
1363 Returns: the value, or -1 on error
1367 readconf_readfixed(const uschar *s, int terminator)
1371 if (!isdigit(*s)) return -1;
1372 (void)sscanf(CS s, "%d%n", &value, &count);
1374 yield = value * 1000;
1378 while (isdigit((*(++s))))
1380 yield += (*s - '0') * m;
1385 return (*s == terminator)? yield : (-1);
1390 /*************************************************
1391 * Find option in list *
1392 *************************************************/
1394 /* The lists are always in order, so binary chop can be used.
1397 name the option name to search for
1398 ol the first entry in the option list
1399 last one more than the offset of the last entry in the option list
1401 Returns: pointer to an option entry, or NULL if not found
1405 find_option(const uschar *name, optionlist *ol, int last)
1408 while (last > first)
1410 int middle = (first + last)/2;
1411 int c = Ustrcmp(name, ol[middle].name);
1413 if (c == 0) return ol + middle;
1414 else if (c > 0) first = middle + 1;
1422 /*************************************************
1423 * Find a set flag in option list *
1424 *************************************************/
1426 /* Because some versions of Unix make no restrictions on the values of uids and
1427 gids (even negative ones), we cannot represent "unset" by a special value.
1428 There is therefore a separate boolean variable for each one indicating whether
1429 a value is set or not. This function returns a pointer to the boolean, given
1430 the original option name. It is a major disaster if the flag cannot be found.
1433 name the name of the uid or gid option
1434 oltop points to the start of the relevant option list
1435 last one more than the offset of the last item in the option list
1436 data_block NULL when reading main options => data values in the option
1437 list are absolute addresses; otherwise they are byte offsets
1438 in data_block (used for driver options)
1440 Returns: a pointer to the boolean flag.
1444 get_set_flag(const uschar *name, optionlist *oltop, int last, void *data_block)
1447 uschar name2[EXIM_DRIVERNAME_MAX];
1448 sprintf(CS name2, "*set_%.50s", name);
1449 if (!(ol = find_option(name2, oltop, last)))
1450 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1451 "Exim internal error: missing set flag for %s", name);
1453 ? (BOOL *)(US data_block + ol->v.offset) : (BOOL *)ol->v.value;
1459 /*************************************************
1460 * Output extra characters message and die *
1461 *************************************************/
1463 /* Called when an option line has junk on the end. Sometimes this is because
1464 the sysadmin thinks comments are permitted.
1467 s points to the extra characters
1468 t1..t3 strings to insert in the log message
1470 Returns: doesn't return; dies
1474 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1476 uschar *comment = US"";
1477 if (*s == '#') comment = US" (# is comment only at line start)";
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1479 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1484 /*************************************************
1485 * Read rewrite information *
1486 *************************************************/
1488 /* Each line of rewrite information contains:
1490 . A complete address in the form user@domain, possibly with
1491 leading * for each part; or alternatively, a regex.
1493 . A replacement string (which will be expanded).
1495 . An optional sequence of one-letter flags, indicating which
1496 headers etc. to apply this rule to.
1498 All this is decoded and placed into a control block. The OR of the flags is
1499 maintained in a common word.
1502 p points to the string that makes up the rule
1503 existflags points to the overall flag word
1504 isglobal TRUE if reading global rewrite rules
1506 Returns: the control block for the parsed rule.
1509 static rewrite_rule *
1510 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1512 rewrite_rule * next = store_get(sizeof(rewrite_rule), GET_UNTAINTED);
1515 next->key = string_dequote(&p);
1517 Uskip_whitespace(&p);
1519 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1520 "missing rewrite replacement string");
1523 next->replacement = string_dequote(&p);
1525 while (*p) switch (*p++)
1527 case ' ': case '\t': break;
1529 case 'q': next->flags |= rewrite_quit; break;
1530 case 'w': next->flags |= rewrite_whole; break;
1532 case 'h': next->flags |= rewrite_all_headers; break;
1533 case 's': next->flags |= rewrite_sender; break;
1534 case 'f': next->flags |= rewrite_from; break;
1535 case 't': next->flags |= rewrite_to; break;
1536 case 'c': next->flags |= rewrite_cc; break;
1537 case 'b': next->flags |= rewrite_bcc; break;
1538 case 'r': next->flags |= rewrite_replyto; break;
1540 case 'E': next->flags |= rewrite_all_envelope; break;
1541 case 'F': next->flags |= rewrite_envfrom; break;
1542 case 'T': next->flags |= rewrite_envto; break;
1544 case 'Q': next->flags |= rewrite_qualify; break;
1545 case 'R': next->flags |= rewrite_repeat; break;
1548 next->flags |= rewrite_smtp;
1549 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1550 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1551 "rewrite rule has the S flag but is not a regular expression");
1555 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1556 "unknown rewrite flag character '%c' "
1557 "(could be missing quotes round replacement item)", p[-1]);
1561 /* If no action flags are set, set all the "normal" rewrites. */
1563 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1564 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1566 /* Remember which exist, for optimization, and return the rule */
1568 *existflags |= next->flags;
1575 /*************************************************
1576 * Read global rewrite information *
1577 *************************************************/
1579 /* Each line is a single rewrite rule; it is parsed into a control block
1580 by readconf_one_rewrite(), and its flags are ORed into the global flag
1581 word rewrite_existflags. */
1584 readconf_rewrites(void)
1586 rewrite_rule **chain = &global_rewrite_rules;
1589 while ((p = get_config_line()) != NULL)
1591 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1593 chain = &(next->next);
1599 /*************************************************
1601 *************************************************/
1603 /* Strings are read into the normal store pool. As long we aren't too
1604 near the end of the current block, the string will just use what is necessary
1605 on the top of the stacking pool, because string_cat() uses the extension
1609 s the rest of the input line
1610 name the option name (for errors)
1612 Returns: pointer to the string
1616 read_string(const uschar *s, const uschar *name)
1621 if (*s != '\"') return string_copy(s);
1624 yield = string_dequote(&s);
1626 if (s == ss+1 || s[-1] != '\"')
1627 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1628 "missing quote at end of string value for %s", name);
1630 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1636 /*************************************************
1637 * Custom-handler options *
1638 *************************************************/
1640 fn_smtp_receive_timeout(const uschar * name, const uschar * str, unsigned flags)
1642 if (flags & opt_fn_print)
1644 if (flags & opt_fn_print_label) printf("%s = ", name);
1645 printf("%s\n", smtp_receive_timeout_s
1646 ? string_printing2(smtp_receive_timeout_s, SP_TAB)
1647 : readconf_printtime(smtp_receive_timeout));
1649 else if (*str == '$')
1650 smtp_receive_timeout_s = string_copy(str);
1653 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1654 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1655 if (smtp_receive_timeout < 0)
1656 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1661 /*************************************************
1662 * Handle option line *
1663 *************************************************/
1665 /* This function is called from several places to process a line containing the
1666 setting of an option. The first argument is the line to be decoded; it has been
1667 checked not to be empty and not to start with '#'. Trailing newlines and white
1668 space have been removed. The second argument is a pointer to the list of
1669 variable names that are to be recognized, together with their types and
1670 locations, and the third argument gives the number of entries in the list.
1672 The fourth argument is a pointer to a data block. If it is NULL, then the data
1673 values in the options list are absolute addresses. Otherwise, they are byte
1674 offsets in the data block.
1676 String option data may continue onto several lines; this function reads further
1677 data from config_file if necessary.
1679 The yield of this function is normally zero. If a string continues onto
1680 multiple lines, then the data value is permitted to be followed by a comma
1681 or a semicolon (for use in drivers) and the yield is that character.
1684 buffer contains the configuration line to be handled
1685 oltop points to the start of the relevant option list
1686 last one more than the offset of the last item in the option list
1687 data_block NULL when reading main options => data values in the option
1688 list are absolute addresses; otherwise they are byte offsets
1689 in data_block when they have opt_public set; otherwise
1690 they are byte offsets in data_block->options_block.
1691 unknown_txt format string to use in panic message for unknown option;
1692 must contain %s for option name
1693 if given as NULL, don't panic on unknown option
1695 Returns: TRUE if an option was read successfully,
1696 FALSE false for an unknown option if unknown_txt == NULL,
1697 otherwise panic and die on an unknown option
1701 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1702 void *data_block, uschar *unknown_txt)
1706 int count, type, value;
1710 BOOL boolvalue = TRUE;
1711 BOOL freesptr = TRUE;
1712 optionlist *ol, *ol2;
1716 uschar *inttype = US"";
1718 const uschar * s = buffer;
1719 uschar **str_target;
1720 uschar name[EXIM_DRIVERNAME_MAX];
1721 uschar name2[EXIM_DRIVERNAME_MAX];
1723 /* There may be leading spaces; thereafter, we expect an option name starting
1726 if (!isalpha( Uskip_whitespace(&s) ))
1727 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1729 /* Read the name of the option, and skip any subsequent white space. If
1730 it turns out that what we read was "hide", set the flag indicating that
1731 this is a secure option, and loop to read the next word. */
1733 for (int n = 0; n < 2; n++)
1735 while (isalnum(*s) || *s == '_')
1737 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1741 Uskip_whitespace(&s);
1742 if (Ustrcmp(name, "hide") != 0) break;
1743 issecure = opt_secure;
1747 /* Deal with "no_" or "not_" here for booleans */
1749 if (Ustrncmp(name, "no_", 3) == 0)
1755 if (Ustrncmp(name, "not_", 4) == 0)
1761 /* Search the list for the given name. A non-existent name, or an option that
1762 is set twice, is a disaster. */
1764 if (!(ol = find_option(name + offset, oltop, last)))
1766 if (!unknown_txt) return FALSE;
1767 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1770 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1771 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1772 "\"%s\" option set for the second time", name);
1774 ol->type |= opt_set | issecure;
1775 type = ol->type & opt_mask;
1777 /* Types with data values must be followed by '='; the "no[t]_" prefix
1778 applies only to boolean values. */
1780 if (type < opt_bool || type > opt_bool_last)
1783 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1784 "negation prefix applied to a non-boolean option");
1786 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1787 "unexpected end of line (data missing) after %s", name);
1789 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1792 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1793 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1794 ultimately expands to one of those values. */
1796 else if (*s && (offset != 0 || *s != '='))
1797 extra_chars_error(s, US"boolean option ", name, US"");
1799 /* Skip white space after = */
1801 if (*s == '=') while (isspace(*++s));
1803 /* If there is a data block and the opt_public flag is not set, change
1804 the data block pointer to the private options block. */
1806 if (data_block && !(ol->type & opt_public))
1807 data_block = (void *)(((driver_instance *)data_block)->options_block);
1809 /* Now get the data according to the type. */
1813 /* If a string value is not enclosed in quotes, it consists of
1814 the rest of the current line, verbatim. Otherwise, string escapes
1817 A transport is specified as a string, which is then looked up in the
1818 list of transports. A search type is specified as one of a number of
1821 A set or rewrite rules for a driver is specified as a string, which is
1822 then parsed into a suitable chain of control blocks.
1824 Uids and gids are specified as strings which are then looked up in the
1825 passwd file. Lists of uids and gids are similarly specified as colon-
1826 separated strings. */
1831 case opt_expand_uid:
1832 case opt_expand_gid:
1837 reset_point = store_mark();
1838 sptr = read_string(s, name);
1840 /* Having read a string, we now have several different ways of using it,
1841 depending on the data type, so do another switch. If keeping the actual
1842 string is not required (because it is interpreted), freesptr is set TRUE,
1843 and at the end we reset the pool. */
1847 /* If this was a string, set the variable to point to the new string,
1848 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1849 rules, we still keep the string (for printing), and parse the rules into a
1850 control block and flags word. */
1853 str_target = data_block ? USS (US data_block + ol->v.offset)
1855 if (ol->type & opt_rep_con)
1857 uschar * saved_condition;
1858 /* We already have a condition, we're conducting a crude hack to let
1859 multiple condition rules be chained together, despite storing them in
1861 *str_target = string_copy_perm( (saved_condition = *str_target)
1862 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1863 saved_condition, sptr)
1866 /* TODO(pdp): there is a memory leak here and just below
1867 when we set 3 or more conditions; I still don't
1868 understand the store mechanism enough to know
1869 what's the safe way to free content from an earlier store.
1870 AFAICT, stores stack, so freeing an early stored item also stores
1871 all data alloc'd after it. If we knew conditions were adjacent,
1872 we could survive that, but we don't. So I *think* we need to take
1873 another bit from opt_type to indicate "malloced"; this seems like
1874 quite a hack, especially for this one case. It also means that
1875 we can't ever reclaim the store from the *first* condition.
1877 Because we only do this once, near process start-up, I'm prepared to
1878 let this slide for the time being, even though it rankles. */
1880 else if (ol->type & opt_rep_str)
1883 Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
1884 : Ustrncmp(name, "set", 3) == 0 ? ';'
1886 int sep_i = -(int)sep_o;
1887 const uschar * list = sptr;
1889 gstring * list_o = NULL;
1893 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1894 list_o = string_cat(list_o, *str_target);
1897 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1898 list_o = string_append_listele(list_o, sep_o, s);
1901 *str_target = string_copy_perm(string_from_gstring(list_o), FALSE);
1912 *USS (US data_block + ol->v.offset) = sptr;
1914 *USS ol->v.value = sptr;
1916 if (type == opt_rewrite)
1921 rewrite_rule **chain;
1924 sprintf(CS name2, "*%.50s_rules", name);
1925 ol2 = find_option(name2, oltop, last);
1926 sprintf(CS name2, "*%.50s_flags", name);
1927 ol3 = find_option(name2, oltop, last);
1930 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1931 "rewrite rules not available for driver");
1935 chain = (rewrite_rule **)(US data_block + ol2->v.offset);
1936 flagptr = (int *)(US data_block + ol3->v.offset);
1940 chain = (rewrite_rule **)ol2->v.value;
1941 flagptr = (int *)ol3->v.value;
1944 /* This will trap if sptr is tainted. Not sure if that can happen */
1945 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1947 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1949 chain = &(next->next);
1952 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1953 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1954 "non-header rewrite - not allowed at transport time -");
1958 /* If it was an expanded uid, see if there is any expansion to be
1959 done by checking for the presence of a $ character. If there is, save it
1960 in the corresponding *expand_user option field. Otherwise, fall through
1961 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1964 case opt_expand_uid:
1965 sprintf(CS name2, "*expand_%.50s", name);
1966 if ((ol2 = find_option(name2, oltop, last)))
1968 uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;
1971 *(USS(US data_block + ol2->v.offset)) = ss;
1973 *(USS ol2->v.value) = ss;
1977 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1983 /* Look up a fixed uid, and also make use of the corresponding gid
1984 if a passwd entry is returned and the gid has not been set. */
1987 if (!route_finduser(sptr, &pw, &uid))
1988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1990 *(uid_t *)(US data_block + ol->v.offset) = uid;
1992 *(uid_t *)ol->v.value = uid;
1994 /* Set the flag indicating a fixed value is set */
1996 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1998 /* Handle matching gid if we have a passwd entry: done by finding the
1999 same name with terminating "user" changed to "group"; if not found,
2000 ignore. Also ignore if the value is already set. */
2002 if (pw == NULL) break;
2003 Ustrcpy(name+Ustrlen(name)-4, US"group");
2004 ol2 = find_option(name, oltop, last);
2005 if (ol2 && ((ol2->type & opt_mask) == opt_gid ||
2006 (ol2->type & opt_mask) == opt_expand_gid))
2008 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
2012 *((gid_t *)(US data_block + ol2->v.offset)) = pw->pw_gid;
2014 *((gid_t *)ol2->v.value) = pw->pw_gid;
2020 /* If it was an expanded gid, see if there is any expansion to be
2021 done by checking for the presence of a $ character. If there is, save it
2022 in the corresponding *expand_user option field. Otherwise, fall through
2023 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
2026 case opt_expand_gid:
2027 sprintf(CS name2, "*expand_%.50s", name);
2028 if ((ol2 = find_option(name2, oltop, last)))
2030 uschar *ss = (Ustrchr(sptr, '$') != NULL) ? sptr : NULL;
2033 *(USS(US data_block + ol2->v.offset)) = ss;
2035 *(USS ol2->v.value) = ss;
2039 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
2045 /* Handle freestanding gid */
2048 if (!route_findgroup(sptr, &gid))
2049 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
2051 *((gid_t *)(US data_block + ol->v.offset)) = gid;
2053 *((gid_t *)ol->v.value) = gid;
2054 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
2057 /* If it was a uid list, look up each individual entry, and build
2058 a vector of uids, with a count in the first element. Put the vector
2059 in malloc store so we can free the string. (We are reading into
2060 permanent store already.) */
2068 const uschar *op = expand_string (sptr);
2071 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2072 name, expand_string_message);
2075 if (*p != 0) count++;
2076 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2077 list = store_malloc(count*sizeof(uid_t));
2078 list[ptr++] = (uid_t)(count - 1);
2081 *((uid_t **)(US data_block + ol->v.offset)) = list;
2083 *((uid_t **)ol->v.value) = list;
2089 /* If p is tainted we trap. Not sure that can happen */
2090 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2091 if (!route_finduser(big_buffer, NULL, &uid))
2092 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
2099 /* If it was a gid list, look up each individual entry, and build
2100 a vector of gids, with a count in the first element. Put the vector
2101 in malloc store so we can free the string. (We are reading into permanent
2110 const uschar *op = expand_string (sptr);
2113 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
2114 name, expand_string_message);
2117 if (*p != 0) count++;
2118 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2119 list = store_malloc(count*sizeof(gid_t));
2120 list[ptr++] = (gid_t)(count - 1);
2123 *((gid_t **)(US data_block + ol->v.offset)) = list;
2125 *((gid_t **)ol->v.value) = list;
2131 /* If p is tainted we trap. Not sure that can happen */
2132 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2133 if (!route_findgroup(big_buffer, &gid))
2134 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2142 /* Release store if the value of the string doesn't need to be kept. */
2144 if (freesptr) reset_point = store_reset(reset_point);
2147 /* Expanded boolean: if no characters follow, or if there are no dollar
2148 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2149 save the string for later expansion in the alternate place. */
2151 case opt_expand_bool:
2152 if (*s && Ustrchr(s, '$') != 0)
2154 sprintf(CS name2, "*expand_%.50s", name);
2155 if ((ol2 = find_option(name2, oltop, last)))
2157 reset_point = store_mark();
2158 sptr = read_string(s, name);
2160 *(USS(US data_block + ol2->v.offset)) = sptr;
2162 *(USS ol2->v.value) = sptr;
2169 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2170 look for yes/not/true/false. Some booleans are stored in a single bit in
2171 a single int. There's a special fudge for verify settings; without a suffix
2172 they set both xx_sender and xx_recipient. The table points to the sender
2173 value; search subsequently for the recipient. There's another special case:
2174 opt_bool_set also notes when a boolean has been set. */
2178 case opt_bool_verify:
2182 s = readconf_readname(name2, EXIM_DRIVERNAME_MAX, s);
2183 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2185 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2187 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2188 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2189 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2190 US"for boolean option ", name);
2193 /* Handle single-bit type. */
2195 if (type == opt_bit)
2197 int bit = 1 << ((ol->type >> 16) & 31);
2198 int * ptr = data_block
2199 ? (int *)(US data_block + ol->v.offset)
2200 : (int *)ol->v.value;
2201 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2205 /* Handle full BOOL types */
2208 *((BOOL *)(US data_block + ol->v.offset)) = boolvalue;
2210 *((BOOL *)ol->v.value) = boolvalue;
2214 if (type == opt_bool_verify)
2216 sprintf(CS name2, "%.50s_recipient", name + offset);
2217 if ((ol2 = find_option(name2, oltop, last)))
2219 *((BOOL *)(US data_block + ol2->v.offset)) = boolvalue;
2221 *((BOOL *)ol2->v.value) = boolvalue;
2224 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2226 else if (type == opt_bool_set)
2228 sprintf(CS name2, "*set_%.50s", name + offset);
2229 if ((ol2 = find_option(name2, oltop, last)))
2231 *((BOOL *)(US data_block + ol2->v.offset)) = TRUE;
2233 *((BOOL *)ol2->v.value) = TRUE;
2241 inttype = US"octal ";
2243 /* Integer: a simple(ish) case; allow octal and hex formats, and
2244 suffixes K, M, G, and T. The different types affect output, not input. */
2253 lvalue = strtol(CS s, CSS &endptr, intbase);
2256 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2259 if (errno != ERANGE && *endptr)
2261 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2263 if ((mp = Ustrchr(mp, *endptr)))
2268 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2279 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2280 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2281 "absolute value of integer \"%s\" is too large (overflow)", s);
2283 if (Uskip_whitespace(&endptr))
2284 extra_chars_error(endptr, inttype, US"integer value for ", name);
2286 value = (int)lvalue;
2290 *(int *)(US data_block + ol->v.offset) = value;
2292 *(int *)ol->v.value = value;
2295 /* Integer held in K: again, allow formats and suffixes as above. */
2301 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2304 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2307 if (errno != ERANGE && *endptr)
2309 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2311 if ((mp = Ustrchr(mp, *endptr)))
2316 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2325 lvalue = (lvalue + 512)/1024;
2328 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2329 "absolute value of integer \"%s\" is too large (overflow)", s);
2331 if (Uskip_whitespace(&endptr))
2332 extra_chars_error(endptr, inttype, US"integer value for ", name);
2335 *(int_eximarith_t *)(US data_block + ol->v.offset) = lvalue;
2337 *(int_eximarith_t *)ol->v.value = lvalue;
2341 /* Fixed-point number: held to 3 decimal places. */
2344 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2345 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2346 "fixed-point number expected for %s", name);
2348 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2349 "integer \"%s\" is too large (overflow)", s);
2353 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2354 "integer \"%s\" is too large (overflow)", s);
2356 /* We get a coverity error here for using count, as it derived
2357 from the tainted buffer pointed to by s, as parsed by sscanf().
2358 By the definition of sscanf we must be accessing between start
2359 and end of s (assuming it is nul-terminated...) so ignore the error. */
2360 /* coverity[tainted_data] */
2361 if (s[count] == '.')
2364 while (isdigit(s[++count]))
2366 value += (s[count] - '0') * d;
2371 while (isspace(s[count])) count++;
2374 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2377 *((int *)(US data_block + ol->v.offset)) = value;
2379 *((int *)ol->v.value) = value;
2382 /* There's a special routine to read time values. */
2385 value = readconf_readtime(s, 0, FALSE);
2387 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2390 *((int *)(US data_block + ol->v.offset)) = value;
2392 *((int *)ol->v.value) = value;
2395 /* A time list is a list of colon-separated times, with the first
2396 element holding the size of the list and the second the number of
2402 int * list = data_block
2403 ? (int *)(US data_block + ol->v.offset)
2404 : (int *)ol->v.value;
2406 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2409 uschar *snext = Ustrchr(s, ':');
2413 while (ss > s && isspace(ss[-1])) ss--;
2416 value = readconf_readtime(s, terminator, FALSE);
2418 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2420 if (count > 1 && value <= list[count])
2421 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2422 "time value out of order for %s", name);
2423 list[count+1] = value;
2424 if (snext == NULL) break;
2426 Uskip_whitespace(&s);
2429 if (count > list[0] - 2)
2430 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2432 if (count > 0 && list[2] == 0) count = 0;
2438 ol->v.fn(name, s, 0);
2447 /*************************************************
2448 * Print a time value *
2449 *************************************************/
2452 Argument: a time value in seconds
2453 Returns: pointer to a fixed buffer containing the time as a string,
2454 in readconf_readtime() format
2458 readconf_printtime(int t)
2461 uschar *p = time_buffer;
2463 if (t < 0) *p++ = '-', t = -t;
2474 if (w > 0) p += sprintf(CS p, "%dw", w);
2475 if (d > 0) p += sprintf(CS p, "%dd", d);
2476 if (h > 0) p += sprintf(CS p, "%dh", h);
2477 if (m > 0) p += sprintf(CS p, "%dm", m);
2478 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2485 /*************************************************
2486 * Print an individual option value *
2487 *************************************************/
2489 /* This is used by the -bP option, so prints to the standard output.
2490 The entire options list is passed in as an argument, because some options come
2491 in pairs - typically uid/gid settings, which can either be explicit numerical
2492 values, or strings to be expanded later. If the numerical value is unset,
2493 search for "*expand_<name>" to see if there is a string equivalent.
2496 ol option entry, or NULL for an unknown option
2498 options_block NULL for main configuration options; otherwise points to
2499 a driver block; if the option doesn't have opt_public
2500 set, then options_block->options_block is where the item
2502 oltop points to the option list in which ol exists
2503 last one more than the offset of the last entry in optop
2504 no_labels do not show "foo = " at the start.
2506 Returns: boolean success
2510 print_ol(optionlist *ol, const uschar *name, void *options_block,
2511 optionlist *oltop, int last, BOOL no_labels)
2520 uschar name2[EXIM_DRIVERNAME_MAX];
2524 printf("%s is not a known option\n", name);
2528 /* Non-admin callers cannot see options that have been flagged secure by the
2531 if (!f.admin_user && ol->type & opt_secure)
2534 printf("%s\n", CCS hidden);
2536 printf("%s = %s\n", name, CCS hidden);
2540 /* Else show the value of the option */
2542 value = ol->v.value;
2545 if (!(ol->type & opt_public))
2546 options_block = (void *)(((driver_instance *)options_block)->options_block);
2547 value = (void *)(US options_block + (long int)value);
2550 switch(ol->type & opt_mask)
2553 case opt_rewrite: /* Show the text value */
2555 if (!no_labels) printf("%s = ", name);
2556 printf("%s\n", s ? string_printing2(s, SP_TAB) : US"");
2560 if (!no_labels) printf("%s = ", name);
2561 printf("%d\n", *((int *)value));
2566 int x = *((int *)value);
2567 if (x != 0 && (x & 1023) == 0)
2571 if ((x & 1023) == 0)
2576 if (!no_labels) printf("%s = ", name);
2577 printf("%d%c\n", x, c);
2581 if (!no_labels) printf("%s = ", name);
2589 int_eximarith_t x = *((int_eximarith_t *)value);
2590 if (!no_labels) printf("%s = ", name);
2591 if (x == 0) printf("0\n");
2592 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2593 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2594 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2595 else printf(PR_EXIM_ARITH "K\n", x);
2600 if (!no_labels) printf("%s = ", name);
2601 printf("%#o\n", *((int *)value));
2604 /* Can be negative only when "unset", in which case integer */
2608 int x = *((int *)value);
2611 if (x < 0) printf("%s =\n", name); else
2613 if (!no_labels) printf("%s = ", name);
2614 printf("%d.", x/1000);
2627 /* If the numerical value is unset, try for the string value */
2629 case opt_expand_uid:
2630 if (! *get_set_flag(name, oltop, last, options_block))
2632 sprintf(CS name2, "*expand_%.50s", name);
2633 if ((ol2 = find_option(name2, oltop, last)))
2636 s = *USS (US options_block + ol2->v.offset);
2638 s = *USS ol2->v.value;
2639 if (!no_labels) printf("%s = ", name);
2640 printf("%s\n", s ? string_printing(s) : US"");
2645 /* Else fall through */
2648 if (!no_labels) printf("%s = ", name);
2649 if (! *get_set_flag(name, oltop, last, options_block))
2652 if ((pw = getpwuid(*((uid_t *)value))))
2653 printf("%s\n", pw->pw_name);
2655 printf("%ld\n", (long int)(*((uid_t *)value)));
2658 /* If the numerical value is unset, try for the string value */
2660 case opt_expand_gid:
2661 if (! *get_set_flag(name, oltop, last, options_block))
2663 sprintf(CS name2, "*expand_%.50s", name);
2664 if ( (ol2 = find_option(name2, oltop, last))
2665 && (ol2->type & opt_mask) == opt_stringptr)
2668 s = *USS (US options_block + ol2->v.offset);
2670 s = *USS ol2->v.value;
2671 if (!no_labels) printf("%s = ", name);
2672 printf("%s\n", s ? string_printing(s) : US"");
2677 /* Else fall through */
2680 if (!no_labels) printf("%s = ", name);
2681 if (! *get_set_flag(name, oltop, last, options_block))
2684 if ((gr = getgrgid(*((int *)value))))
2685 printf("%s\n", gr->gr_name);
2687 printf("%ld\n", (long int)(*((int *)value)));
2691 uidlist = *((uid_t **)value);
2692 if (!no_labels) printf("%s =", name);
2695 uschar sep = no_labels ? '\0' : ' ';
2696 for (int i = 1; i <= (int)(uidlist[0]); i++)
2698 uschar *name = NULL;
2699 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2700 if (sep != '\0') printf("%c", sep);
2701 if (name) printf("%s", name);
2702 else printf("%ld", (long int)(uidlist[i]));
2710 gidlist = *((gid_t **)value);
2711 if (!no_labels) printf("%s =", name);
2714 uschar sep = no_labels ? '\0' : ' ';
2715 for (int i = 1; i <= (int)(gidlist[0]); i++)
2717 uschar *name = NULL;
2718 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2719 if (sep != '\0') printf("%c", sep);
2720 if (name) printf("%s", name);
2721 else printf("%ld", (long int)(gidlist[i]));
2729 if (!no_labels) printf("%s = ", name);
2730 printf("%s\n", readconf_printtime(*((int *)value)));
2735 int *list = (int *)value;
2736 if (!no_labels) printf("%s = ", name);
2737 for (int i = 0; i < list[1]; i++)
2738 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2744 printf("%s%s\n", (*((int *)value)) & (1 << ((ol->type >> 16) & 31))
2745 ? "" : "no_", name);
2748 case opt_expand_bool:
2749 sprintf(CS name2, "*expand_%.50s", name);
2750 if ((ol2 = find_option(name2, oltop, last)) && ol2->v.value)
2753 s = *USS (US options_block + ol2->v.offset);
2755 s = *USS ol2->v.value;
2758 if (!no_labels) printf("%s = ", name);
2759 printf("%s\n", string_printing(s));
2762 /* s == NULL => string not set; fall through */
2768 case opt_bool_verify:
2770 printf("%s%s\n", *((BOOL *)value) ? "" : "no_", name);
2774 ol->v.fn(name, NULL, no_labels ? opt_fn_print : opt_fn_print|opt_fn_print_label);
2782 /*************************************************
2783 * Print value from main configuration *
2784 *************************************************/
2786 /* This function, called as a result of encountering the -bP option,
2787 causes the value of any main configuration variable to be output if the
2788 second argument is NULL. There are some special values:
2790 all print all main configuration options
2791 config_file print the name of the configuration file
2792 (configure_file will still work, for backward
2794 routers print the routers' configurations
2795 transports print the transports' configuration
2796 authenticators print the authenticators' configuration
2797 macros print the macros' configuration
2798 router_list print a list of router names
2799 transport_list print a list of transport names
2800 authenticator_list print a list of authentication mechanism names
2801 macro_list print a list of macro names
2802 +name print a named list item
2803 local_scan print the local_scan options
2804 config print the configuration as it is parsed
2805 environment print the used execution environment
2807 If the second argument is not NULL, it must be one of "router", "transport",
2808 "authenticator" or "macro" in which case the first argument identifies the
2809 driver whose options are to be printed.
2812 name option name if type == NULL; else driver name
2813 type NULL or driver type name, as described above
2814 no_labels avoid the "foo = " at the start of an item
2816 Returns: Boolean success
2820 readconf_print(const uschar * name, const uschar * type, BOOL no_labels)
2822 BOOL names_only = FALSE;
2823 optionlist *ol2 = NULL;
2824 driver_instance *d = NULL;
2833 static uschar *types[] = { US"address", US"domain", US"host",
2835 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2836 &hostlist_anchor, &localpartlist_anchor };
2838 for (int i = 0; i < 4; i++)
2839 if ((t = tree_search(*(anchors[i]), name+1)))
2841 namedlist_block * nb = t->data.ptr;
2842 const uschar * s = nb->hide ? hidden : nb->string;
2845 printf("%s\n", CCS s);
2847 printf("%slist %s = %s\n", types[i], name+1, CCS s);
2851 printf("no address, domain, host, or local part list called \"%s\" "
2852 "exists\n", name+1);
2857 if ( Ustrcmp(name, "configure_file") == 0
2858 || Ustrcmp(name, "config_file") == 0)
2860 printf("%s\n", CS config_main_filename);
2864 if (Ustrcmp(name, "all") == 0)
2866 for (optionlist * ol = optionlist_config;
2867 ol < optionlist_config + nelem(optionlist_config); ol++)
2868 if (!(ol->type & opt_hidden))
2869 (void) print_ol(ol, US ol->name, NULL,
2870 optionlist_config, nelem(optionlist_config),
2875 if (Ustrcmp(name, "local_scan") == 0)
2877 #ifndef LOCAL_SCAN_HAS_OPTIONS
2878 printf("local_scan() options are not supported\n");
2881 for (optionlist * ol = local_scan_options;
2882 ol < local_scan_options + local_scan_options_count; ol++)
2883 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2884 local_scan_options_count, no_labels);
2889 if (Ustrcmp(name, "config") == 0)
2891 print_config(f.admin_user, no_labels);
2895 if (Ustrcmp(name, "routers") == 0)
2900 else if (Ustrcmp(name, "transports") == 0)
2902 type = US"transport";
2905 else if (Ustrcmp(name, "authenticators") == 0)
2907 type = US"authenticator";
2910 else if (Ustrcmp(name, "macros") == 0)
2915 else if (Ustrcmp(name, "router_list") == 0)
2921 else if (Ustrcmp(name, "transport_list") == 0)
2923 type = US"transport";
2927 else if (Ustrcmp(name, "authenticator_list") == 0)
2929 type = US"authenticator";
2933 else if (Ustrcmp(name, "macro_list") == 0)
2939 else if (Ustrcmp(name, "environment") == 0)
2944 for (p = USS environ; *p; p++) ;
2945 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2947 for (p = USS environ; *p; p++)
2950 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2958 return print_ol(find_option(name,
2959 optionlist_config, nelem(optionlist_config)),
2960 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2963 /* Handle the options for a router or transport. Skip options that are flagged
2964 as hidden. Some of these are options with names starting with '*', used for
2965 internal alternative representations of other options (which the printing
2966 function will sort out). Others are synonyms kept for backward compatibility.
2969 if (Ustrcmp(type, "router") == 0)
2971 d = (driver_instance *)routers;
2972 ol2 = optionlist_routers;
2973 size = optionlist_routers_size;
2975 else if (Ustrcmp(type, "transport") == 0)
2977 d = (driver_instance *)transports;
2978 ol2 = optionlist_transports;
2979 size = optionlist_transports_size;
2981 else if (Ustrcmp(type, "authenticator") == 0)
2983 d = (driver_instance *)auths;
2984 ol2 = optionlist_auths;
2985 size = optionlist_auths_size;
2988 else if (Ustrcmp(type, "macro") == 0)
2990 /* People store passwords in macros and they were previously not available
2991 for printing. So we have an admin_users restriction. */
2994 fprintf(stderr, "exim: permission denied; not admin\n");
2997 for (macro_item * m = macros; m; m = m->next)
2998 if (!name || Ustrcmp(name, m->name) == 0)
3001 printf("%s\n", CS m->name);
3003 printf("%s\n", CS m->replacement);
3005 printf("%s=%s\n", CS m->name, CS m->replacement);
3009 if (!name) return TRUE;
3011 printf("%s %s not found\n", type, name);
3017 for (; d; d = d->next) printf("%s\n", CS d->name);
3021 /* Either search for a given driver, or print all of them */
3023 for (; d; d = d->next)
3026 driver_info * di = d->info;
3029 printf("\n%s %s:\n", d->name, type);
3030 else if (Ustrcmp(d->name, name) != 0) continue;
3032 for (optionlist * ol = ol2; ol < ol2 + size; ol++)
3033 if (!(ol->type & opt_hidden))
3034 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
3036 for (optionlist * ol = di->options;
3037 ol < di->options + *di->options_count; ol++)
3038 if (!(ol->type & opt_hidden))
3039 rc |= print_ol(ol, US ol->name, d, di->options,
3040 *di->options_count, no_labels);
3042 if (name) return rc;
3044 if (!name) return TRUE;
3046 printf("%s %s not found\n", type, name);
3052 /*************************************************
3053 * Read a named list item *
3054 *************************************************/
3056 /* This function reads a name and a list (i.e. string). The name is used to
3057 save the list in a tree, sorted by its name. Each entry also has a number,
3058 which can be used for caching tests, but if the string contains any expansion
3059 items other than $key, the number is set negative to inhibit caching. This
3060 mechanism is used for domain, host, and address lists that are referenced by
3064 anchorp points to the tree anchor
3065 numberp points to the current number for this tree
3066 max the maximum number permitted
3067 s the text of the option line, starting immediately after the name
3069 tname the name of the list type, for messages
3070 hide do not output value on "-bP"
3076 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
3077 uschar *tname, BOOL hide)
3079 BOOL forcecache = FALSE;
3082 namedlist_block * nb = store_get_perm(sizeof(namedlist_block), GET_UNTAINTED);
3084 if (Ustrncmp(s, "_cache", 6) == 0)
3091 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
3093 if (*numberp >= max)
3094 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
3097 Uskip_whitespace(&s);
3099 while (isalnum(*s) || *s == '_') s++;
3100 t = store_get(sizeof(tree_node) + s-ss, ss);
3101 Ustrncpy(t->name, ss, s-ss);
3103 Uskip_whitespace(&s);
3105 if (!tree_insertnode(anchorp, t))
3106 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3107 "duplicate name \"%s\" for a named %s", t->name, tname);
3110 nb->number = *numberp;
3114 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3115 "missing '=' after \"%s\"", t->name);
3116 Uskip_whitespace(&s);
3117 nb->string = read_string(s, t->name);
3118 nb->cache_data = NULL;
3120 /* Check the string for any expansions; if any are found, mark this list
3121 uncacheable unless the user has explicited forced caching. */
3123 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3129 /*************************************************
3130 * Unpick data for a rate limit *
3131 *************************************************/
3133 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3137 s string, in the form t,b,f,l
3138 where t is the threshold (integer)
3139 b is the initial delay (time)
3140 f is the multiplicative factor (fixed point)
3141 k is the maximum time (time)
3142 threshold where to store threshold
3143 base where to store base in milliseconds
3144 factor where to store factor in milliseconds
3145 limit where to store limit
3147 Returns: nothing (panics on error)
3151 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3154 uschar bstring[16], lstring[16];
3156 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3157 factor, lstring) == 4)
3159 *base = readconf_readtime(bstring, 0, TRUE);
3160 *limit = readconf_readtime(lstring, 0, TRUE);
3161 if (*base >= 0 && *limit >= 0) return;
3163 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3169 /*************************************************
3170 * Read main configuration options *
3171 *************************************************/
3173 /* This function is the first to be called for configuration reading. It
3174 opens the configuration file and reads general configuration settings until
3175 it reaches the end of the configuration section. The file is then left open so
3176 that the remaining configuration data can subsequently be read if needed for
3179 The configuration file must be owned either by root or exim, and be writeable
3180 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3181 in the config file, so the test is done on the compiled in values. A slight
3182 anomaly, to be carefully documented.
3184 The name of the configuration file is taken from a list that is included in the
3185 binary of Exim. It can be altered from the command line, but if that is done,
3186 root privilege is immediately withdrawn unless the caller is root or exim.
3187 The first file on the list that exists is used.
3189 For use on multiple systems that share file systems, first look for a
3190 configuration file whose name has the current node name on the end. If that is
3191 not found, try the generic name. For really contorted configurations, that run
3192 multiple Exims with different uid settings, first try adding the effective uid
3193 before the node name. These complications are going to waste resources on most
3194 systems. Therefore they are available only when requested by compile-time
3198 readconf_main(BOOL nowarn)
3201 struct stat statbuf;
3202 uschar * s, * filename;
3203 const uschar * list = config_main_filelist;
3205 /* Loop through the possible file names */
3207 /* Should never be a tainted list */
3208 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3211 /* Cut out all the fancy processing unless specifically wanted */
3213 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3214 uschar *suffix = filename + Ustrlen(filename);
3216 /* Try for the node-specific file if a node name exists */
3218 # ifdef CONFIGURE_FILE_USE_NODE
3220 if (uname(&uts) >= 0)
3222 # ifdef CONFIGURE_FILE_USE_EUID
3223 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3224 if (!(config_file = Ufopen(filename, "rb")))
3225 # endif /* CONFIGURE_FILE_USE_EUID */
3227 sprintf(CS suffix, ".%.256s", uts.nodename);
3228 config_file = Ufopen(filename, "rb");
3231 # endif /* CONFIGURE_FILE_USE_NODE */
3233 /* Otherwise, try the generic name, possibly with the euid added */
3235 # ifdef CONFIGURE_FILE_USE_EUID
3238 sprintf(CS suffix, ".%ld", (long int)original_euid);
3239 config_file = Ufopen(filename, "rb");
3241 # endif /* CONFIGURE_FILE_USE_EUID */
3243 /* Finally, try the unadorned name */
3248 config_file = Ufopen(filename, "rb");
3250 #else /* if neither defined */
3252 /* This is the common case when the fancy processing is not included. */
3254 config_file = Ufopen(filename, "rb");
3257 /* If the file does not exist, continue to try any others. For any other
3258 error, break out (and die). */
3260 if (config_file || errno != ENOENT) break;
3263 /* On success, save the name for verification; config_filename is used when
3264 logging configuration errors (it changes for .included files) whereas
3265 config_main_filename is the name shown by -bP. Failure to open a configuration
3266 file is a serious disaster. */
3270 uschar *last_slash = Ustrrchr(filename, '/');
3271 config_filename = config_main_filename = string_copy(filename);
3273 /* The config_main_directory we need for the $config_dir expansion.
3274 config_main_filename we need for $config_file expansion.
3275 And config_dir is the directory of the current configuration, used for
3276 relative .includes. We do need to know it's name, as we change our working
3279 if (filename[0] == '/')
3280 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3283 /* relative configuration file name: working dir + / + basename(filename) */
3285 uschar buf[PATH_MAX];
3288 if (os_getcwd(buf, PATH_MAX) == NULL)
3290 perror("exim: getcwd");
3291 exim_exit(EXIT_FAILURE);
3293 g = string_cat(NULL, buf);
3295 /* If the dir does not end with a "/", append one */
3296 if (gstring_last_char(g) != '/')
3297 g = string_catn(g, US"/", 1);
3299 /* If the config file contains a "/", extract the directory part */
3301 g = string_catn(g, filename, last_slash - filename);
3303 config_main_directory = string_from_gstring(g);
3305 config_directory = config_main_directory;
3309 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3310 "%s", config_main_filelist);
3312 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
3313 string_open_failed("configuration file %s", filename));
3315 /* Now, once we found and opened our configuration file, we change the directory
3316 to a safe place. Later we change to $spool_directory. */
3318 if (Uchdir("/") < 0)
3320 perror("exim: chdir `/': ");
3321 exim_exit(EXIT_FAILURE);
3324 /* Check the status of the file we have opened, if we have retained root
3325 privileges and the file isn't /dev/null (which *should* be 0666). */
3327 if (f.trusted_config && Ustrcmp(filename, US"/dev/null"))
3329 if (fstat(fileno(config_file), &statbuf) != 0)
3330 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3333 if ( statbuf.st_uid != root_uid /* owner not root */
3334 #ifdef CONFIGURE_OWNER
3335 && statbuf.st_uid != config_uid /* owner not the special one */
3338 statbuf.st_gid != root_gid /* group not root & */
3339 #ifdef CONFIGURE_GROUP
3340 && statbuf.st_gid != config_gid /* group not the special one */
3342 && (statbuf.st_mode & 020) != 0 /* group writeable */
3344 (statbuf.st_mode & 2) != 0 /* world writeable */
3346 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3347 "wrong owner, group, or mode", big_buffer);
3349 /* Do a dummy store-allocation of a size related to the (toplevel) file size.
3350 This assumes we will need this much storage to handle all the allocations
3351 during startup; it won't help when .include is being used. When it does, it
3352 will cut down on the number of store blocks (and malloc calls, and sbrk
3353 syscalls). It also assume we're on the relevant pool. */
3355 if (statbuf.st_size > 8192)
3357 rmark r = store_mark();
3358 void * dummy = store_get((int)statbuf.st_size, GET_UNTAINTED);
3363 /* Process the main configuration settings. They all begin with a lower case
3364 letter. If we see something starting with an upper case letter, it is taken as
3365 a macro definition. */
3367 while ((s = get_config_line()))
3372 if (config_lineno == 1 && Ustrstr(s, "\xef\xbb\xbf") == s)
3373 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3374 "found unexpected BOM (Byte Order Mark)");
3378 if (!macro_read_assignment(s)) exim_exit(EXIT_FAILURE);
3382 t = (hide = Ustrncmp(s, "hide", 4) == 0 && isspace(s[4])) ? s + 5 : s;
3384 if (Ustrncmp(t, "domainlist", 10) == 0)
3385 read_named_list(&domainlist_anchor, &domainlist_count,
3386 MAX_NAMED_LIST, t+10, US"domain list", hide);
3388 else if (Ustrncmp(t, "hostlist", 8) == 0)
3389 read_named_list(&hostlist_anchor, &hostlist_count,
3390 MAX_NAMED_LIST, t+8, US"host list", hide);
3392 else if (Ustrncmp(t, "addresslist", 11) == 0)
3393 read_named_list(&addresslist_anchor, &addresslist_count,
3394 MAX_NAMED_LIST, t+11, US"address list", hide);
3396 else if (Ustrncmp(t, "localpartlist", 13) == 0)
3397 read_named_list(&localpartlist_anchor, &localpartlist_count,
3398 MAX_NAMED_LIST, t+13, US"local part list", hide);
3401 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3402 NULL, US"main option \"%s\" unknown");
3406 /* If local_sender_retain is set, local_from_check must be unset. */
3408 if (local_sender_retain && local_from_check)
3409 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3410 "local_sender_retain are set; this combination is not allowed");
3412 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3415 if (timezone_string && !*timezone_string) timezone_string = NULL;
3417 /* The max retry interval must not be greater than 24 hours. */
3419 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3421 /* remote_max_parallel must be > 0 */
3423 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3425 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3426 start of a new SMTP message. */
3428 freeze_tell_config = freeze_tell;
3430 /* The primary host name may be required for expansion of spool_directory
3431 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3432 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3433 canonize it. Some people like upper case letters in their host names, so we
3434 don't force the case. */
3436 if (!primary_hostname)
3438 const uschar * hostname;
3441 if (uname(&uts) < 0)
3442 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3443 hostname = US uts.nodename;
3445 if (Ustrchr(hostname, '.') == NULL)
3448 struct hostent *hostdata;
3452 && ( !dns_ipv4_lookup
3453 || match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3454 MCL_DOMAIN, TRUE, NULL) != OK))
3461 # if HAVE_GETIPNODEBYNAME
3463 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3465 hostdata = gethostbyname2(CS hostname, af);
3468 hostdata = gethostbyname(CS hostname);
3472 { hostname = US hostdata->h_name; break; }
3474 if (af == AF_INET) break;
3479 primary_hostname = string_copy(hostname);
3482 /* Set up default value for smtp_active_hostname */
3484 smtp_active_hostname = primary_hostname;
3486 /* If spool_directory wasn't set in the build-time configuration, it must have
3487 got set above. Of course, writing to the log may not work if log_file_path is
3488 not set, but it will at least get to syslog or somewhere, with any luck. */
3490 if (!*spool_directory)
3491 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3494 /* Expand the spool directory name; it may, for example, contain the primary
3495 host name. Same comment about failure. */
3497 if (!(s = expand_string(spool_directory)))
3498 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3499 "\"%s\": %s", spool_directory, expand_string_message);
3500 spool_directory = s;
3502 /* Expand log_file_path, which must contain "%s" in any component that isn't
3503 the null string or "syslog". It is also allowed to contain one instance of %D
3504 or %M. However, it must NOT contain % followed by anything else. */
3508 const uschar *ss, *sss;
3509 int sep = ':'; /* Fixed for log file path */
3510 if (!(s = expand_string(log_file_path)))
3511 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3512 "\"%s\": %s", log_file_path, expand_string_message);
3515 /* should never be a tainted list */
3516 while ((sss = string_nextinlist(&ss, &sep, big_buffer, big_buffer_size)))
3519 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3520 if (!(t = Ustrstr(sss, "%s")))
3521 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3522 "contain \"%%s\"", sss);
3524 if ((t = Ustrchr(sss, '%')))
3525 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3526 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3527 "unexpected \"%%\" character", s);
3533 /* Interpret syslog_facility into an integer argument for 'ident' param to
3534 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3537 if (syslog_facility_str)
3540 uschar * s = syslog_facility_str;
3542 if ((Ustrlen(syslog_facility_str) >= 4) &&
3543 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3546 for (i = 0; i < syslog_list_size; i++)
3547 if (strcmpic(s, syslog_list[i].name) == 0)
3549 syslog_facility = syslog_list[i].value;
3553 if (i >= syslog_list_size)
3554 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3555 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3558 /* Expand pid_file_path */
3562 const uschar * t = expand_cstring(pid_file_path);
3564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3565 "\"%s\": %s", pid_file_path, expand_string_message);
3569 /* Set default value of process_log_path */
3571 if (!process_log_path || !*process_log_path)
3572 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3574 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3577 regex_From = regex_must_compile(uucp_from_pattern, MCS_NOFLAGS, TRUE);
3579 /* Unpick the SMTP rate limiting options, if set */
3581 if (smtp_ratelimit_mail)
3582 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3583 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3585 if (smtp_ratelimit_rcpt)
3586 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3587 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3589 /* The qualify domains default to the primary host name */
3591 if (!qualify_domain_sender)
3592 qualify_domain_sender = primary_hostname;
3593 if (!qualify_domain_recipient)
3594 qualify_domain_recipient = qualify_domain_sender;
3596 /* Setting system_filter_user in the configuration sets the gid as well if a
3597 name is given, but a numerical value does not. */
3599 if (system_filter_uid_set && !system_filter_gid_set)
3601 struct passwd *pw = getpwuid(system_filter_uid);
3603 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3604 (long int)system_filter_uid);
3605 system_filter_gid = pw->pw_gid;
3606 system_filter_gid_set = TRUE;
3609 /* If the errors_reply_to field is set, check that it is syntactically valid
3610 and ensure it contains a domain. */
3612 if (errors_reply_to)
3615 int start, end, domain;
3616 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3617 &start, &end, &domain, FALSE);
3620 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3621 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3624 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3625 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3628 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3629 smtp_accept_max must also be set. */
3631 if (smtp_accept_max == 0 && (smtp_accept_queue > 0 || smtp_accept_max_per_host))
3632 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3633 "smtp_accept_max must be set if smtp_accept_queue or "
3634 "smtp_accept_max_per_host is set");
3636 /* Set up the host number if anything is specified. It is an expanded string
3637 so that it can be computed from the host name, for example. We do this last
3638 so as to ensure that everything else is set up before the expansion. */
3640 if (host_number_string)
3644 uschar *s = expand_string(host_number_string);
3647 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3648 "failed to expand localhost_number \"%s\": %s",
3649 host_number_string, expand_string_message);
3650 n = Ustrtol(s, &end, 0);
3651 if (Uskip_whitespace(&end))
3652 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3653 "localhost_number value is not a number: %s", s);
3654 if (n > LOCALHOST_MAX)
3655 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3656 "localhost_number is greater than the maximum allowed value (%d)",
3662 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3664 if ((tls_verify_hosts || tls_try_verify_hosts) && !tls_verify_certificates)
3665 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3666 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3667 tls_verify_hosts ? "" : "try_");
3669 /* Magic number: at time of writing, 1024 has been the long-standing value
3670 used by so many clients, and what Exim used to use always, that it makes
3671 sense to just min-clamp this max-clamp at that. */
3672 if (tls_dh_max_bits < 1024)
3673 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3674 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3676 /* If openssl_options is set, validate it */
3677 if (openssl_options)
3680 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3681 "openssl_options is set but we're using GnuTLS");
3684 if (!tls_openssl_options_parse(openssl_options, &dummy))
3685 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3686 "openssl_options parse error: %s", openssl_options);
3689 #endif /*DISABLE_TLS*/
3691 if (!nowarn && !keep_environment && environ && *environ)
3692 log_write(0, LOG_MAIN,
3693 "Warning: purging the environment.\n"
3694 " Suggested action: use keep_environment.");
3699 /* Add a driver info struct to a list. */
3702 add_driver_info(driver_info ** drlist_p, const driver_info * newent,
3705 driver_info * listent = store_get(size, newent);
3706 memcpy(listent, newent, size);
3707 listent->next = *drlist_p;
3711 /*************************************************
3712 * Initialize one driver *
3713 *************************************************/
3715 /* This is called once the driver's generic options, if any, have been read.
3716 We can now find the driver, set up defaults for the private options, and
3717 unset any "set" bits in the private options table (which might have been
3718 set by another incarnation of the same driver).
3721 d pointer to driver instance block, with generic
3723 info_anchor list of available drivers
3724 size_of_info size of each block in drivers_available
3725 class class of driver
3727 Returns: pointer to the driver info block
3730 static driver_info *
3731 init_driver(driver_instance * d, driver_info ** info_anchor,
3732 int size_of_info, const uschar * class)
3738 /* First scan the list of driver seen so far. */
3740 for (di = *info_anchor; di; di = di->next)
3741 if (Ustrcmp(d->driver_name, di->driver_name) == 0)
3744 #ifdef LOOKUP_MODULE_DIR
3745 /* Potentially a loadable module. Look for a file with the right name. */
3747 if (!(dd = exim_opendir(CUS LOOKUP_MODULE_DIR)))
3749 log_write(0, LOG_MAIN|LOG_PANIC,
3750 "Couldn't open %s: not loading driver modules\n", LOOKUP_MODULE_DIR);
3754 uschar * fname = string_sprintf("%s_%s." DYNLIB_FN_EXT, d->driver_name, class), * sname;
3755 const char * errormsg;
3757 DEBUG(D_any) debug_printf("Loading %s %s driver from %s\n",
3758 d->driver_name, class, LOOKUP_MODULE_DIR);
3760 for(struct dirent * ent; ent = readdir(dd); ) if (Ustrcmp(ent->d_name, fname) == 0)
3762 void * dl = dlopen(CS string_sprintf(LOOKUP_MODULE_DIR "/%s", fname), RTLD_NOW);
3763 static driver_magics dm[] = {
3764 { ROUTER_MAGIC, US"router" },
3765 { TRANSPORT_MAGIC, US"transport" },
3766 { AUTH_MAGIC, US"auth" },
3771 errormsg = dlerror();
3772 log_write(0, LOG_MAIN|LOG_PANIC, "Error loading %s %s driver: %s\n",
3773 d->driver_name, class, errormsg);
3776 (void) dlerror(); /* cf. comment in init_lookup_list() */
3778 di = (driver_info *) dlsym(dl, CS string_sprintf("_%s_info", class));
3779 if ((errormsg = dlerror()))
3781 log_write(0, LOG_MAIN|LOG_PANIC,
3782 "%s does not appear to be a %s module (%s)\n", fname, class, errormsg);
3786 for(driver_magics * dmp = dm; dmp < dm + nelem(dm); dmp++)
3787 if(Ustrcmp(dmp->class, class) == 0 && dmp->magic == di->dyn_magic)
3789 int old_pool = store_pool;
3790 store_pool = POOL_PERM;
3791 add_driver_info(info_anchor, di, size_of_info);
3792 store_pool = old_pool;
3793 DEBUG(D_any) debug_printf("Loaded %s %s\n", d->driver_name, class);
3798 log_write(0, LOG_MAIN|LOG_PANIC,
3799 "%s module %s is not compatible with this version of Exim\n",
3800 class, d->driver_name);
3806 #endif /* LOOKUP_MODULE_DIR */
3808 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3809 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3813 len = di->options_len;
3815 d->options_block = store_get_perm(len, GET_UNTAINTED);
3816 memcpy(d->options_block, di->options_block, len);
3817 for (int i = 0; i < *di->options_count; i++)
3818 di->options[i].type &= ~opt_set;
3826 driver_init_fini(driver_instance * d, const uschar * class)
3828 driver_info * di = d->info;
3830 if (!d->driver_name)
3831 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3832 "no driver defined for %s \"%s\"", class, d->name);
3837 /*************************************************
3838 * Initialize driver list *
3839 *************************************************/
3841 /* This function is called for routers, transports, and authentication
3842 mechanisms. It reads the data from the current point in the configuration file
3843 up to the end of the section, and sets up a chain of instance blocks according
3844 to the file's contents. The file will already have been opened by a call to
3845 readconf_main, and must be left open for subsequent reading of further data.
3847 Any errors cause a panic crash. Note that the blocks with names driver_info and
3848 driver_instance must map the first portions of all the _info and _instance
3849 blocks for this shared code to work.
3852 anchor &routers, &transports, &auths
3853 info_anchor available drivers
3854 size_of_info size of each info block
3855 instance_default points to default data for an instance
3856 instance_size size of instance block
3857 driver_optionlist generic option list
3858 driver_optionlist_count count of generic option list
3859 class "router", "transport", or "auth"
3860 for filename component (and error message)
3866 readconf_driver_init(
3867 driver_instance ** anchor,
3868 driver_info ** info_anchor,
3870 void * instance_default,
3872 optionlist * driver_optionlist,
3873 int driver_optionlist_count,
3874 const uschar * class)
3876 driver_instance ** p = anchor;
3877 driver_instance * d = NULL;
3880 while ((buffer = get_config_line()))
3882 uschar name[EXIM_DRIVERNAME_MAX];
3885 /* Read the first name on the line and test for the start of a new driver. A
3886 macro definition indicates the end of the previous driver. If this isn't the
3887 start of a new driver, the line will be re-read. */
3889 s = readconf_readname(name, sizeof(name), buffer);
3891 /* Handle macro definition, first finishing off the initialization of the
3892 previous driver, if any. */
3894 if (isupper(*name) && *s == '=')
3898 /* s is using big_buffer, so this call had better not */
3899 driver_init_fini(d, class);
3902 if (!macro_read_assignment(buffer)) exim_exit(EXIT_FAILURE);
3906 /* If the line starts with a name terminated by a colon, we are at the
3907 start of the definition of a new driver. The rest of the line must be
3912 /* Finish off initializing the previous driver. */
3915 driver_init_fini(d, class);
3917 /* Check that we haven't already got a driver of this name */
3919 for (d = *anchor; d; d = d->next)
3920 if (Ustrcmp(name, d->name) == 0)
3921 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3922 "there are two %ss called \"%s\"", class, name);
3924 /* Set up a new driver instance data block on the chain, with
3925 its default values installed. */
3927 d = store_get_perm(instance_size, GET_UNTAINTED);
3928 memcpy(d, instance_default, instance_size);
3930 p = (driver_instance **)&d->next;
3931 d->name = string_copy(name);
3932 d->srcfile = config_filename;
3933 d->srcline = config_lineno;
3935 /* Clear out the "set" bits in the generic options */
3937 for (int i = 0; i < driver_optionlist_count; i++)
3938 driver_optionlist[i].type &= ~opt_set;
3940 /* Check nothing more on this line, then do the next loop iteration. */
3942 Uskip_whitespace(&s);
3943 if (*s) extra_chars_error(s, US"driver name ", name, US"");
3947 /* Not the start of a new driver. Give an error if we have not set up a
3948 current driver yet. */
3951 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s name missing", class);
3953 /* First look to see if this is a generic option; if it is "driver",
3954 initialize the driver. If is it not a generic option, we can look for a
3955 private option provided that the driver has been previously set up. */
3957 if (readconf_handle_option(buffer, driver_optionlist,
3958 driver_optionlist_count, d, NULL))
3960 if (!d->info && d->driver_name)
3961 init_driver(d, info_anchor, size_of_info, class);
3964 /* Handle private options - pass the generic block because some may
3965 live therein. A flag with each option indicates if it is in the public
3970 driver_info * di = d->info;
3971 readconf_handle_option(buffer, di->options,
3972 *di->options_count, d, US"option \"%s\" unknown");
3975 /* The option is not generic and the driver name has not yet been given. */
3977 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3978 "(\"driver\" must be specified before any private options)", name);
3981 /* Run the initialization function for the final driver. */
3984 driver_init_fini(d, class);
3989 /*************************************************
3990 * Check driver dependency *
3991 *************************************************/
3993 /* This function is passed a driver instance and a string. It checks whether
3994 any of the string options for the driver contains the given string as an
3998 d points to a driver instance block
3999 s the string to search for
4001 Returns: TRUE if a dependency is found
4005 readconf_depends(driver_instance * d, uschar * s)
4007 driver_info * di = d->info;
4008 int count = *di->options_count;
4011 for (optionlist * ol = di->options; ol < di->options + count; ol++)
4012 if ((ol->type & opt_mask) == opt_stringptr)
4014 void * options_block = ol->type & opt_public ? (void *)d : d->options_block;
4015 uschar * value = *USS(US options_block + ol->v.offset);
4017 if (value && (ss = Ustrstr(value, s)) != NULL)
4019 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
4020 isalnum(ss[Ustrlen(s)])) continue;
4021 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
4022 d->name, ol->name, s);
4027 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
4034 /*************************************************
4035 * Decode an error type for retries *
4036 *************************************************/
4038 /* This function is global because it is also called from the main
4039 program when testing retry information. It decodes strings such as "quota_7d"
4040 into numerical error codes.
4043 pp points to start of text
4044 p points past end of text
4045 basic_errno points to an int to receive the main error number
4046 more_errno points to an int to receive the secondary error data
4048 Returns: NULL if decoded correctly; else points to error text
4052 readconf_retry_error(const uschar *pp, const uschar *p,
4053 int *basic_errno, int *more_errno)
4056 const uschar *q = pp;
4057 while (q < p && *q != '_') q++;
4060 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
4062 *basic_errno = ERRNO_EXIMQUOTA;
4063 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
4064 return US"bad time value";
4067 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
4069 *basic_errno = ECONNREFUSED;
4072 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
4073 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
4074 else return US"A or MX expected after \"refused\"";
4078 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
4080 *basic_errno = ETIMEDOUT;
4084 int xlen = p - q - 1;
4085 const uschar *x = q + 1;
4087 static uschar *extras[] =
4088 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
4089 static int values[] =
4090 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
4092 for (i = 0; i < nelem(extras); i++)
4093 if (strncmpic(x, extras[i], xlen) == 0)
4095 *more_errno = values[i];
4099 if (i >= nelem(extras))
4100 if (strncmpic(x, US"DNS", xlen) == 0)
4101 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
4102 "available in retry rules (it has never worked) - treated as "
4105 return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
4109 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
4110 strncmpic(pp, US"rcpt_4", 6) == 0 ||
4111 strncmpic(pp, US"data_4", 6) == 0)
4114 int x = 255; /* means "any 4xx code" */
4115 if (p != pp + 8) bad = TRUE; else
4117 int a = pp[6], b = pp[7];
4121 if (isdigit(b)) x += b - '0';
4122 else if (b == 'x') x += 100;
4125 else if (a != 'x' || b != 'x') bad = TRUE;
4129 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
4130 "x is literal and d is any digit", pp);
4132 *basic_errno = *pp == 'm' ? ERRNO_MAIL4XX :
4133 *pp == 'r' ? ERRNO_RCPT4XX : ERRNO_DATA4XX;
4134 *more_errno = x << 8;
4137 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
4138 strncmpic(q+1, US"failed", p-q-1) == 0)
4139 *basic_errno = ERRNO_AUTHFAIL;
4141 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
4142 *basic_errno = ERRNO_SMTPCLOSED;
4144 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
4145 *basic_errno = ERRNO_TLSREQUIRED;
4147 else if (strncmpic(pp, US"lookup", p - pp) == 0)
4148 *basic_errno = ERRNO_UNKNOWNHOST;
4150 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
4151 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
4159 /*************************************************
4160 * Read retry information *
4161 *************************************************/
4163 /* Each line of retry information contains:
4165 . A domain name pattern or an address pattern;
4167 . An error name, possibly with additional data, or *;
4169 . An optional sequence of retry items, each consisting of an identifying
4170 letter, a cutoff time, and optional parameters.
4172 All this is decoded and placed into a control block. */
4175 /* Subroutine to read an argument, preceded by a comma and terminated
4176 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
4177 1 = fixed point number (returned *1000).
4180 paddr pointer to pointer to current character; updated
4181 type 0 => read a time; 1 => read a fixed point number
4183 Returns: time in seconds or fixed point number * 1000
4187 retry_arg(const uschar ** paddr, int type)
4189 const uschar * p = *paddr, * pp;
4191 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
4193 Uskip_whitespace(&p);
4195 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
4197 if (*p && !isspace(*p) && *p != ',' && *p != ';')
4198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
4203 case 0: return readconf_readtime(pp, *p, FALSE);
4204 case 1: return readconf_readfixed(pp, *p);
4206 return 0; /* Keep picky compilers happy */
4209 /* The function proper */
4212 readconf_retries(void)
4214 retry_config **chain = &retries;
4218 while ((p = get_config_line()))
4220 retry_rule **rchain;
4224 next = store_get(sizeof(retry_config), GET_UNTAINTED);
4227 chain = &(next->next);
4228 next->basic_errno = next->more_errno = 0;
4229 next->senders = NULL;
4231 rchain = &(next->rules);
4233 next->pattern = string_dequote(&p);
4234 Uskip_whitespace(&p);
4236 while (mac_isgraph(*p)) p++;
4237 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4238 "missing error type in retry rule");
4240 /* Test error names for things we understand. */
4242 if ((error = readconf_retry_error(pp, p, &next->basic_errno,
4243 &next->more_errno)))
4244 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
4246 /* There may be an optional address list of senders to be used as another
4247 constraint on the rule. This was added later, so the syntax is a bit of a
4248 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
4251 Uskip_whitespace(&p);
4252 if (Ustrncmp(p, "senders", 7) == 0)
4255 Uskip_whitespace(&p);
4256 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4257 "\"=\" expected after \"senders\" in retry rule");
4258 Uskip_whitespace(&p);
4259 next->senders = string_dequote(&p);
4262 /* Now the retry rules. Keep the maximum timeout encountered. */
4264 Uskip_whitespace(&p);
4268 retry_rule * rule = store_get(sizeof(retry_rule), GET_UNTAINTED);
4270 rchain = &(rule->next);
4272 rule->rule = toupper(*p++);
4273 rule->timeout = retry_arg(&p, 0);
4274 if (rule->timeout > retry_maximum_timeout)
4275 retry_maximum_timeout = rule->timeout;
4279 case 'F': /* Fixed interval */
4280 rule->p1 = retry_arg(&p, 0);
4283 case 'G': /* Geometrically increasing intervals */
4284 case 'H': /* Ditto, but with randomness */
4285 rule->p1 = retry_arg(&p, 0);
4286 rule->p2 = retry_arg(&p, 1);
4290 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
4294 if (rule->timeout <= 0 || rule->p1 <= 0 ||
4295 (rule->rule != 'F' && rule->p2 < 1000))
4296 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4297 "bad parameters for retry rule");
4299 if (Uskip_whitespace(&p) == ';')
4302 Uskip_whitespace(&p);
4305 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
4312 /*************************************************
4313 * Initialize authenticators *
4314 *************************************************/
4316 /* Read the authenticators section of the configuration file.
4325 #ifndef DISABLE_PIPE_CONNECT
4328 int old_pool = store_pool;
4329 store_pool = POOL_PERM;
4331 driver_info ** anchor = (driver_info **) &auths_available;
4332 extern auth_info cram_md5_auth_info;
4333 extern auth_info cyrus_sasl_auth_info;
4334 extern auth_info dovecot_auth_info;
4335 extern auth_info external_auth_info;
4336 extern auth_info gsasl_auth_info;
4337 extern auth_info heimdal_gssapi_auth_info;
4338 extern auth_info plaintext_auth_info;
4339 extern auth_info spa_auth_info;
4340 extern auth_info tls_auth_info;
4342 /* Add the transport drivers that are built for static linkage to the
4343 list of availables. */
4345 #if defined(AUTH_CRAM_MD5) && AUTH_CRAM_MD5!=2
4346 add_driver_info(anchor, &cram_md5_auth_info.drinfo, sizeof(auth_info));
4348 #if defined(AUTH_CYRUS_SASL) && AUTH_CYRUS_SASL!=2
4349 add_driver_info(anchor, &cyrus_sasl_auth_info.drinfo, sizeof(auth_info));
4351 #if defined(AUTH_DOVECOT) && AUTH_DOVECOT!=2
4352 add_driver_info(anchor, &dovecot_auth_info.drinfo, sizeof(auth_info));
4354 #if defined(AUTH_EXTERNAL) && AUTH_EXTERNAL!=2
4355 add_driver_info(anchor, &external_auth_info.drinfo, sizeof(auth_info));
4357 #if defined(AUTH_GSASL) && AUTH_GSASL!=2
4358 add_driver_info(anchor, &gsasl_auth_info.drinfo, sizeof(auth_info));
4360 #if defined(AUTH_HEIMDAL_GSSAPI) && AUTH_HEIMDAL_GSSAPI!=2
4361 add_driver_info(anchor, &heimdal_gssapi_auth_info.drinfo, sizeof(auth_info));
4363 #if defined(AUTH_PLAINTEXT) && AUTH_PLAINTEXT!=2
4364 add_driver_info(anchor, &plaintext_auth_info.drinfo, sizeof(auth_info));
4366 #if defined(AUTH_SPA) && AUTH_SPA!=2
4367 add_driver_info(anchor, &spa_auth_info.drinfo, sizeof(auth_info));
4369 #if defined(AUTH_TLS) && AUTH_TLS!=2
4370 add_driver_info(anchor, &tls_auth_info.drinfo, sizeof(auth_info));
4373 store_pool = old_pool;
4375 /* Read the config file "authenticators" section, creating an auth instance list.
4376 For any yet-undiscovered driver, check for a loadable module and add it to
4379 readconf_driver_init((driver_instance **)&auths, /* chain anchor */
4380 (driver_info **)&auths_available, /* available drivers */
4381 sizeof(auth_info), /* size of info block */
4382 &auth_defaults, /* default values for generic options */
4383 sizeof(auth_instance), /* size of instance block */
4384 optionlist_auths, /* generic options */
4385 optionlist_auths_size,
4388 for (auth_instance * au = auths; au; au = au->drinst.next)
4390 if (!au->public_name)
4391 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
4392 "the %s authenticator", au->drinst.name);
4394 for (auth_instance * bu = au->drinst.next; bu; bu = bu->drinst.next)
4395 if (strcmpic(au->public_name, bu->public_name) == 0)
4396 if ( au->client && bu->client
4397 || au->server && bu->server)
4398 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
4399 "(%s and %s) have the same public name (%s)",
4400 au->client && bu->client ? US"client" : US"server",
4401 au->drinst.name, bu->drinst.name, au->public_name);
4402 #ifndef DISABLE_PIPE_CONNECT
4406 #ifndef DISABLE_PIPE_CONNECT
4407 f.smtp_in_early_pipe_no_auth = nauths > 16; /* bits in bitmap limit */
4412 /* For error messages, a string describing the config location associated
4413 with current processing. NULL if we are not in an authenticator. */
4416 authenticator_current_name(void)
4418 if (!authenticator_name) return NULL;
4419 return string_sprintf(" (authenticator %s, %s %d)", authenticator_name, driver_srcfile, driver_srcline);
4426 /*************************************************
4427 * Read ACL information *
4428 *************************************************/
4430 /* If this run of Exim is not doing something that involves receiving a
4431 message, we can just skip over the ACL information. No need to parse it.
4433 First, we have a function for acl_read() to call back to get the next line. We
4434 need to remember the line we passed, because at the end it will contain the
4435 name of the next ACL. */
4437 static uschar *acl_line;
4442 acl_line = get_config_line();
4447 /* Now the main function:
4456 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4459 acl_line = get_config_line();
4463 uschar name[EXIM_DRIVERNAME_MAX];
4466 const uschar * p = readconf_readname(name, sizeof(name), acl_line);
4468 if (isupper(*name) && *p == '=')
4470 if (!macro_read_assignment(acl_line)) exim_exit(EXIT_FAILURE);
4471 acl_line = get_config_line();
4475 if (*p != ':' || name[0] == 0)
4476 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4478 node = store_get_perm(sizeof(tree_node) + Ustrlen(name), name);
4479 Ustrcpy(node->name, name);
4480 if (!tree_insertnode(&acl_anchor, node))
4481 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4482 "there are two ACLs called \"%s\"", name);
4484 node->data.ptr = acl_read(acl_callback, &error);
4486 if (node->data.ptr == NULL && error != NULL)
4487 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4493 /*************************************************
4494 * Read configuration for local_scan() *
4495 *************************************************/
4497 /* This function is called after "begin local_scan" is encountered in the
4498 configuration file. If the local_scan() function allows for configuration
4499 options, we can process them. Otherwise, we expire in a panic.
4506 local_scan_init(void)
4508 #ifndef LOCAL_SCAN_HAS_OPTIONS
4509 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4510 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4514 while ((p = get_config_line()))
4515 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4516 NULL, US"local_scan option \"%s\" unknown");
4522 /*************************************************
4523 * Read rest of configuration (after main) *
4524 *************************************************/
4526 /* This function reads the rest of the runtime configuration, after the main
4527 configuration. It is called only when actually needed. Each subsequent section
4528 of the configuration starts with a line of the form
4532 where the name is "routers", "transports", etc. A section is terminated by
4533 hitting the next "begin" line, and the next name is left in next_section.
4534 Because it may confuse people as to whether the names are singular or plural,
4535 we add "s" if it's missing. There is always enough room in next_section for
4536 this. This function is basically just a switch.
4542 static uschar *section_list[] = {
4556 while(next_section[0] != 0)
4560 int last = nelem(section_list);
4562 int n = Ustrlen(next_section);
4564 READCONF_DEBUG fprintf(stderr, "%s: %s\n", __FUNCTION__, next_section);
4565 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, US"s");
4569 int c = strcmpic(next_section, section_list[mid]);
4571 if (c > 0) first = mid + 1; else last = mid;
4573 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4574 "\"%.*s\" is not a known configuration section name", n, next_section);
4575 mid = (last + first)/2;
4579 if (((had ^= bit) & bit) == 0)
4580 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4581 "\"%.*s\" section is repeated in the configuration file", n,
4586 case 0: readconf_acl(); break;
4587 case 1: auths_init(); break;
4588 case 2: local_scan_init(); break;
4589 case 3: readconf_retries(); break;
4590 case 4: readconf_rewrites(); break;
4591 case 5: route_init(); break;
4592 case 6: transport_init(); break;
4596 (void)fclose(config_file);
4599 /* Init the storage for the pre-parsed config lines */
4601 readconf_save_config(const uschar *s)
4603 save_config_line(string_sprintf("# Exim Configuration (%s)",
4604 f.running_in_test_harness ? US"X" : s));
4608 save_config_position(const uschar *file, int line)
4610 save_config_line(string_sprintf("# %d \"%s\"", line, file));
4613 /* Append a pre-parsed logical line to the config lines store,
4614 this operates on a global (static) list that holds all the pre-parsed
4615 config lines, we do no further processing here, output formatting and
4616 honouring of <hide> or macros will be done during output */
4619 save_config_line(const uschar* line)
4621 static config_line_item *current;
4622 config_line_item *next;
4624 next = (config_line_item*) store_get(sizeof(config_line_item), GET_UNTAINTED);
4625 next->line = string_copy(line);
4628 if (!config_lines) config_lines = next;
4629 else current->next = next;
4634 /* List the parsed config lines, care about nice formatting and
4635 hide the <hide> values unless we're the admin user */
4637 print_config(BOOL admin, BOOL terse)
4639 const int TS = terse ? 0 : 2;
4643 for (const config_line_item * i = config_lines; i; i = i->next)
4645 uschar * current, * p;
4647 if (r) store_reset(r);
4650 /* skip over to the first non-space */
4651 current = string_copy(i->line);
4652 if (!Uskip_whitespace(¤t))
4655 /* Collapse runs of spaces. We stop this if we encounter one of the
4656 following characters: "'$, as this may indicate careful formatting */
4658 for (p = current; *p; p++) if (isspace(*p))
4661 if (*p != ' ') *p = ' ';
4663 Uskip_whitespace(&p);
4666 memmove(p+1, next, Ustrlen(next)+1);
4668 if (*next == '"' || *next == '\'' || *next == '$')
4673 if (current[0] == '#')
4676 /* begin lines are left aligned */
4677 else if (Ustrncmp(current, "begin", 5) == 0 && isspace(current[5]))
4679 if (!terse) puts("");
4684 /* router/acl/transport block names */
4685 else if (current[Ustrlen(current)-1] == ':' && !Ustrchr(current, '='))
4687 if (!terse) puts("");
4688 printf("%*s%s\n", TS, "", current);
4692 /* hidden lines (all MACROS or lines prefixed with "hide") */
4694 && ( isupper(*current)
4695 || Ustrncmp(current, "hide", 4) == 0 && isspace(current[4])
4699 if ((p = Ustrchr(current, '=')))
4702 printf("%*s%s= %s\n", indent, "", current, CCS hidden);
4704 /* e.g.: hide split_spool_directory */
4706 printf("%*s\n", indent, CCS hidden);
4710 /* rest is public */
4711 printf("%*s%s\n", indent, "", current);
4713 if (r) store_reset(r);
4716 #endif /*!MACRO_PREDEF*/
4719 /* End of readconf.c */