Merge from EXISCAN branch.
[exim.git] / src / src / readconf.c
1 /* $Cambridge: exim/src/src/readconf.c,v 1.3 2004/12/16 15:11:47 tom Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2004 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
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. */
13
14 #include "exim.h"
15
16 #define CSTATE_STACK_SIZE 10
17
18
19 /* Structure for chain (stack) of .included files */
20
21 typedef struct config_file_item {
22 struct config_file_item *next;
23 uschar *filename;
24 FILE *file;
25 int lineno;
26 } config_file_item;
27
28 /* Structure of table of conditional words and their state transitions */
29
30 typedef struct cond_item {
31 uschar *name;
32 int namelen;
33 int action1;
34 int action2;
35 int pushpop;
36 } cond_item;
37
38 /* Structure of table of syslog facility names and values */
39
40 typedef struct syslog_fac_item {
41 uschar *name;
42 int value;
43 } syslog_fac_item;
44
45
46 /* Static variables */
47
48 static config_file_item *config_file_stack = NULL; /* For includes */
49
50 static uschar *syslog_facility_str = NULL;
51 static uschar next_section[24];
52 static uschar time_buffer[24];
53
54 /* State variables for conditional loading (.ifdef / .else / .endif) */
55
56 static int cstate = 0;
57 static int cstate_stack_ptr = -1;
58 static int cstate_stack[CSTATE_STACK_SIZE];
59
60 /* Table of state transitions for handling conditional inclusions. There are
61 four possible state transitions:
62
63 .ifdef true
64 .ifdef false
65 .elifdef true (or .else)
66 .elifdef false
67
68 .endif just causes the previous cstate to be popped off the stack */
69
70 static int next_cstate[3][4] =
71 {
72 /* State 0: reading from file, or reading until next .else or .endif */
73 { 0, 1, 2, 2 },
74 /* State 1: condition failed, skipping until next .else or .endif */
75 { 2, 2, 0, 1 },
76 /* State 2: skipping until .endif */
77 { 2, 2, 2, 2 },
78 };
79
80 /* Table of conditionals and the states to set. For each name, there are four
81 values: the length of the name (to save computing it each time), the state to
82 set if a macro was found in the line, the state to set if a macro was not found
83 in the line, and a stack manipulation setting which is:
84
85 -1 pull state value off the stack
86 0 don't alter the stack
87 +1 push value onto stack, before setting new state
88 */
89
90 static cond_item cond_list[] = {
91 { US"ifdef", 5, 0, 1, 1 },
92 { US"ifndef", 6, 1, 0, 1 },
93 { US"elifdef", 7, 2, 3, 0 },
94 { US"elifndef", 8, 3, 2, 0 },
95 { US"else", 4, 2, 2, 0 },
96 { US"endif", 5, 0, 0, -1 }
97 };
98
99 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
100
101 /* Table of syslog facility names and their values */
102
103 static syslog_fac_item syslog_list[] = {
104 { US"mail", LOG_MAIL },
105 { US"user", LOG_USER },
106 { US"news", LOG_NEWS },
107 { US"uucp", LOG_UUCP },
108 { US"local0", LOG_LOCAL0 },
109 { US"local1", LOG_LOCAL1 },
110 { US"local2", LOG_LOCAL2 },
111 { US"local3", LOG_LOCAL3 },
112 { US"local4", LOG_LOCAL4 },
113 { US"local5", LOG_LOCAL5 },
114 { US"local6", LOG_LOCAL6 },
115 { US"local7", LOG_LOCAL7 },
116 { US"daemon", LOG_DAEMON }
117 };
118
119 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
120
121
122
123
124 /*************************************************
125 * Main configuration options *
126 *************************************************/
127
128 /* The list of options that can be set in the main configuration file. This
129 must be in alphabetic order because it is searched by binary chop. */
130
131 static optionlist optionlist_config[] = {
132 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
133 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
134 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
135 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
136 { "accept_8bitmime", opt_bool, &accept_8bitmime },
137 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
138 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
139 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
140 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
141 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
142 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
143 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
144 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
145 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
146 #ifdef WITH_CONTENT_SCAN
147 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
148 #endif
149 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
150 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
151 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
152 #ifdef SUPPORT_TLS
153 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
154 #endif
155 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
156 { "admin_groups", opt_gidlist, &admin_groups },
157 { "allow_domain_literals", opt_bool, &allow_domain_literals },
158 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
159 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
160 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
161 { "auto_thaw", opt_time, &auto_thaw },
162 #ifdef WITH_CONTENT_SCAN
163 { "av_scanner", opt_stringptr, &av_scanner },
164 #endif
165 { "bi_command", opt_stringptr, &bi_command },
166 #ifdef EXPERIMENTAL_BRIGHTMAIL
167 { "bmi_config_file", opt_stringptr, &bmi_config_file },
168 #endif
169 { "bounce_message_file", opt_stringptr, &bounce_message_file },
170 { "bounce_message_text", opt_stringptr, &bounce_message_text },
171 { "bounce_return_body", opt_bool, &bounce_return_body },
172 { "bounce_return_message", opt_bool, &bounce_return_message },
173 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
174 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
175 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
176 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
177 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
178 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
179 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
180 { "check_log_inodes", opt_int, &check_log_inodes },
181 { "check_log_space", opt_Kint, &check_log_space },
182 { "check_spool_inodes", opt_int, &check_spool_inodes },
183 { "check_spool_space", opt_Kint, &check_spool_space },
184 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
185 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
186 { "delay_warning", opt_timelist, &delay_warning },
187 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
188 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
189 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
190 { "delivery_date_remove", opt_bool, &delivery_date_remove },
191 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
192 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
193 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
194 { "dns_retrans", opt_time, &dns_retrans },
195 { "dns_retry", opt_int, &dns_retry },
196 /* This option is now a no-op, retained for compability */
197 { "drop_cr", opt_bool, &drop_cr },
198 /*********************************************************/
199 { "envelope_to_remove", opt_bool, &envelope_to_remove },
200 { "errors_copy", opt_stringptr, &errors_copy },
201 { "errors_reply_to", opt_stringptr, &errors_reply_to },
202 { "exim_group", opt_gid, &exim_gid },
203 { "exim_path", opt_stringptr, &exim_path },
204 { "exim_user", opt_uid, &exim_uid },
205 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
206 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
207 { "finduser_retries", opt_int, &finduser_retries },
208 { "freeze_tell", opt_stringptr, &freeze_tell },
209 { "gecos_name", opt_stringptr, &gecos_name },
210 { "gecos_pattern", opt_stringptr, &gecos_pattern },
211 { "header_line_maxsize", opt_int, &header_line_maxsize },
212 { "header_maxsize", opt_int, &header_maxsize },
213 { "headers_charset", opt_stringptr, &headers_charset },
214 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
215 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
216 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
217 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
218 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
219 { "hold_domains", opt_stringptr, &hold_domains },
220 { "host_lookup", opt_stringptr, &host_lookup },
221 { "host_lookup_order", opt_stringptr, &host_lookup_order },
222 { "host_reject_connection", opt_stringptr, &host_reject_connection },
223 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
224 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
225 #ifdef LOOKUP_IBASE
226 { "ibase_servers", opt_stringptr, &ibase_servers },
227 #endif
228 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
229 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
230 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
231 { "keep_malformed", opt_time, &keep_malformed },
232 #ifdef LOOKUP_LDAP
233 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
234 { "ldap_version", opt_int, &eldap_version },
235 #endif
236 { "local_from_check", opt_bool, &local_from_check },
237 { "local_from_prefix", opt_stringptr, &local_from_prefix },
238 { "local_from_suffix", opt_stringptr, &local_from_suffix },
239 { "local_interfaces", opt_stringptr, &local_interfaces },
240 { "local_scan_timeout", opt_time, &local_scan_timeout },
241 { "local_sender_retain", opt_bool, &local_sender_retain },
242 { "localhost_number", opt_stringptr, &host_number_string },
243 { "log_file_path", opt_stringptr, &log_file_path },
244 { "log_selector", opt_stringptr, &log_selector_string },
245 { "log_timezone", opt_bool, &log_timezone },
246 { "lookup_open_max", opt_int, &lookup_open_max },
247 { "max_username_length", opt_int, &max_username_length },
248 { "message_body_visible", opt_mkint, &message_body_visible },
249 { "message_id_header_domain", opt_stringptr, &message_id_domain },
250 { "message_id_header_text", opt_stringptr, &message_id_text },
251 { "message_logs", opt_bool, &message_logs },
252 { "message_size_limit", opt_stringptr, &message_size_limit },
253 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
254 { "move_frozen_messages", opt_bool, &move_frozen_messages },
255 #endif
256 { "mua_wrapper", opt_bool, &mua_wrapper },
257 #ifdef LOOKUP_MYSQL
258 { "mysql_servers", opt_stringptr, &mysql_servers },
259 #endif
260 { "never_users", opt_uidlist, &never_users },
261 #ifdef LOOKUP_ORACLE
262 { "oracle_servers", opt_stringptr, &oracle_servers },
263 #endif
264 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
265 #ifdef EXIM_PERL
266 { "perl_at_start", opt_bool, &opt_perl_at_start },
267 { "perl_startup", opt_stringptr, &opt_perl_startup },
268 #endif
269 #ifdef LOOKUP_PGSQL
270 { "pgsql_servers", opt_stringptr, &pgsql_servers },
271 #endif
272 { "pid_file_path", opt_stringptr, &pid_file_path },
273 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
274 { "preserve_message_logs", opt_bool, &preserve_message_logs },
275 { "primary_hostname", opt_stringptr, &primary_hostname },
276 { "print_topbitchars", opt_bool, &print_topbitchars },
277 { "process_log_path", opt_stringptr, &process_log_path },
278 { "prod_requires_admin", opt_bool, &prod_requires_admin },
279 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
280 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
281 { "queue_domains", opt_stringptr, &queue_domains },
282 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
283 { "queue_only", opt_bool, &queue_only },
284 { "queue_only_file", opt_stringptr, &queue_only_file },
285 { "queue_only_load", opt_fixed, &queue_only_load },
286 { "queue_only_override", opt_bool, &queue_only_override },
287 { "queue_run_in_order", opt_bool, &queue_run_in_order },
288 { "queue_run_max", opt_int, &queue_run_max },
289 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
290 { "receive_timeout", opt_time, &receive_timeout },
291 { "received_header_text", opt_stringptr, &received_header_text },
292 { "received_headers_max", opt_int, &received_headers_max },
293 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
294 { "recipients_max", opt_int, &recipients_max },
295 { "recipients_max_reject", opt_bool, &recipients_max_reject },
296 { "remote_max_parallel", opt_int, &remote_max_parallel },
297 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
298 { "retry_data_expire", opt_time, &retry_data_expire },
299 { "retry_interval_max", opt_time, &retry_interval_max },
300 { "return_path_remove", opt_bool, &return_path_remove },
301 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
302 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
303 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
304 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
305 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
306 { "smtp_accept_max", opt_int, &smtp_accept_max },
307 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
308 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
309 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
310 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
311 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
312 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
313 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
314 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
315 { "smtp_banner", opt_stringptr, &smtp_banner },
316 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
317 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
318 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
319 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
320 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
321 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
322 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
323 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
324 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
325 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
326 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
327 { "smtp_receive_timeout", opt_time, &smtp_receive_timeout },
328 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
329 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
330 #ifdef WITH_CONTENT_SCAN
331 { "spamd_address", opt_stringptr, &spamd_address },
332 #endif
333 { "split_spool_directory", opt_bool, &split_spool_directory },
334 { "spool_directory", opt_stringptr, &spool_directory },
335 #ifdef EXPERIMENTAL_SRS
336 { "srs_config", opt_stringptr, &srs_config },
337 #endif
338 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
339 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
340 { "syslog_duplication", opt_bool, &syslog_duplication },
341 { "syslog_facility", opt_stringptr, &syslog_facility_str },
342 { "syslog_processname", opt_stringptr, &syslog_processname },
343 { "syslog_timestamp", opt_bool, &syslog_timestamp },
344 { "system_filter", opt_stringptr, &system_filter },
345 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
346 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
347 { "system_filter_group", opt_gid, &system_filter_gid },
348 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
349 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
350 { "system_filter_user", opt_uid, &system_filter_uid },
351 { "tcp_nodelay", opt_bool, &tcp_nodelay },
352 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
353 { "timezone", opt_stringptr, &timezone_string },
354 #ifdef SUPPORT_TLS
355 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
356 { "tls_certificate", opt_stringptr, &tls_certificate },
357 { "tls_crl", opt_stringptr, &tls_crl },
358 { "tls_dhparam", opt_stringptr, &tls_dhparam },
359 { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
360 { "tls_privatekey", opt_stringptr, &tls_privatekey },
361 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
362 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
363 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
364 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
365 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
366 #endif
367 { "trusted_groups", opt_gidlist, &trusted_groups },
368 { "trusted_users", opt_uidlist, &trusted_users },
369 { "unknown_login", opt_stringptr, &unknown_login },
370 { "unknown_username", opt_stringptr, &unknown_username },
371 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
372 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
373 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
374 { "warn_message_file", opt_stringptr, &warn_message_file },
375 { "write_rejectlog", opt_bool, &write_rejectlog }
376 };
377
378 static int optionlist_config_size =
379 sizeof(optionlist_config)/sizeof(optionlist);
380
381
382
383 /*************************************************
384 * Find the name of an option *
385 *************************************************/
386
387 /* This function is to aid debugging. Various functions take arguments that are
388 pointer variables in the options table or in option tables for various drivers.
389 For debugging output, it is useful to be able to find the name of the option
390 which is currently being processed. This function finds it, if it exists, by
391 searching the table(s).
392
393 Arguments: a value that is presumed to be in the table above
394 Returns: the option name, or an empty string
395 */
396
397 uschar *
398 readconf_find_option(void *p)
399 {
400 int i;
401 router_instance *r;
402 transport_instance *t;
403
404 for (i = 0; i < optionlist_config_size; i++)
405 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
406
407 for (r = routers; r != NULL; r = r->next)
408 {
409 router_info *ri = r->info;
410 for (i = 0; i < ri->options_count[0]; i++)
411 {
412 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
413 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
414 return US ri->options[i].name;
415 }
416 }
417
418 for (t = transports; t != NULL; t = t->next)
419 {
420 transport_info *ti = t->info;
421 for (i = 0; i < ti->options_count[0]; i++)
422 {
423 if ((ti->options[i].type & opt_mask) != opt_stringptr) continue;
424 if (p == (char *)(t->options_block) + (long int)(ti->options[i].value))
425 return US ti->options[i].name;
426 }
427 }
428
429 return US"";
430 }
431
432
433
434
435
436 /*************************************************
437 * Read configuration line *
438 *************************************************/
439
440 /* A logical line of text is read from the configuration file into the big
441 buffer, taking account of macros, .includes, and continuations. The size of
442 big_buffer is increased if necessary. The count of configuration lines is
443 maintained. Physical input lines starting with # (ignoring leading white space,
444 and after macro replacement) and empty logical lines are always ignored.
445 Leading and trailing spaces are removed.
446
447 If we hit a line of the form "begin xxxx", the xxxx is placed in the
448 next_section vector, and the function returns NULL, indicating the end of a
449 configuration section. On end-of-file, NULL is returned with next_section
450 empty.
451
452 Arguments: none
453
454 Returns: a pointer to the first non-blank in the line,
455 or NULL if eof or end of section is reached
456 */
457
458 static uschar *
459 get_config_line(void)
460 {
461 int startoffset = 0; /* To first non-blank char in logical line */
462 int len = 0; /* Of logical line so far */
463 int newlen;
464 uschar *s, *ss;
465 macro_item *m;
466 BOOL macro_found;
467
468 /* Loop for handling continuation lines, skipping comments, and dealing with
469 .include files. */
470
471 for (;;)
472 {
473 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
474 {
475 if (config_file_stack != NULL) /* EOF inside .include */
476 {
477 fclose(config_file);
478 config_file = config_file_stack->file;
479 config_filename = config_file_stack->filename;
480 config_lineno = config_file_stack->lineno;
481 config_file_stack = config_file_stack->next;
482 continue;
483 }
484
485 /* EOF at top level */
486
487 if (cstate_stack_ptr >= 0)
488 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
489 "Unexpected end of configuration file: .endif missing");
490
491 if (len != 0) break; /* EOF after continuation */
492 next_section[0] = 0; /* EOF at start of logical line */
493 return NULL;
494 }
495
496 config_lineno++;
497 newlen = len + Ustrlen(big_buffer + len);
498
499 /* Handle pathologically long physical lines - yes, it did happen - by
500 extending big_buffer at this point. The code also copes with very long
501 logical lines. */
502
503 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
504 {
505 uschar *newbuffer;
506 big_buffer_size += BIG_BUFFER_SIZE;
507 newbuffer = store_malloc(big_buffer_size);
508
509 /* This use of strcpy is OK because we know that the string in the old
510 buffer is shorter than the new buffer. */
511
512 Ustrcpy(newbuffer, big_buffer);
513 store_free(big_buffer);
514 big_buffer = newbuffer;
515 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
516 break;
517 newlen += Ustrlen(big_buffer + newlen);
518 }
519
520 /* Find the true start of the physical line - leading spaces are always
521 ignored. */
522
523 ss = big_buffer + len;
524 while (isspace(*ss)) ss++;
525
526 /* Process the physical line for macros. If this is the start of the logical
527 line, skip over initial text at the start of the line if it starts with an
528 upper case character followed by a sequence of name characters and an equals
529 sign, because that is the definition of a new macro, and we don't do
530 replacement therein. */
531
532 s = ss;
533 if (len == 0 && isupper(*s))
534 {
535 while (isalnum(*s) || *s == '_') s++;
536 while (isspace(*s)) s++;
537 if (*s != '=') s = ss; /* Not a macro definition */
538 }
539
540 /* For each defined macro, scan the line (from after XXX= if present),
541 replacing all occurrences of the macro. */
542
543 macro_found = FALSE;
544 for (m = macros; m != NULL; m = m->next)
545 {
546 uschar *p, *pp;
547 uschar *t = s;
548
549 while ((p = Ustrstr(t, m->name)) != NULL)
550 {
551 int moveby;
552 int namelen = Ustrlen(m->name);
553 int replen = Ustrlen(m->replacement);
554
555 /* Expand the buffer if necessary */
556
557 while (newlen - namelen + replen + 1 > big_buffer_size)
558 {
559 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
560 uschar *newbuffer = store_malloc(newsize);
561 memcpy(newbuffer, big_buffer, newlen + 1);
562 p = newbuffer + (p - big_buffer);
563 s = newbuffer + (s - big_buffer);
564 ss = newbuffer + (ss - big_buffer);
565 t = newbuffer + (t - big_buffer);
566 big_buffer_size = newsize;
567 store_free(big_buffer);
568 big_buffer = newbuffer;
569 }
570
571 /* Shuffle the remaining characters up or down in the buffer before
572 copying in the replacement text. Don't rescan the replacement for this
573 same macro. */
574
575 pp = p + namelen;
576 moveby = replen - namelen;
577 if (moveby != 0)
578 {
579 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
580 newlen += moveby;
581 }
582 Ustrncpy(p, m->replacement, replen);
583 t = p + replen;
584 macro_found = TRUE;
585 }
586 }
587
588 /* An empty macro replacement at the start of a line could mean that ss no
589 longer points to the first non-blank character. */
590
591 while (isspace(*ss)) ss++;
592
593 /* Check for comment lines - these are physical lines. */
594
595 if (*ss == '#') continue;
596
597 /* Handle conditionals, which are also applied to physical lines. Conditions
598 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
599 expansion occured on the rest of the line. A preliminary test for the leading
600 '.' saves effort on most lines. */
601
602 if (*ss == '.')
603 {
604 int i;
605
606 /* Search the list of conditional directives */
607
608 for (i = 0; i < cond_list_size; i++)
609 {
610 int n;
611 cond_item *c = cond_list+i;
612 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
613
614 /* The following character must be white space or end of string */
615
616 n = ss[1 + c->namelen];
617 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
618
619 /* .ifdef and .ifndef push the current state onto the stack, then set
620 a new one from the table. Stack overflow is an error */
621
622 if (c->pushpop > 0)
623 {
624 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
625 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
626 ".%s nested too deeply", c->name);
627 cstate_stack[++cstate_stack_ptr] = cstate;
628 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
629 }
630
631 /* For any of the others, stack underflow is an error. The next state
632 comes either from the stack (.endif) or from the table. */
633
634 else
635 {
636 if (cstate_stack_ptr < 0)
637 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
638 ".%s without matching .ifdef", c->name);
639 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
640 next_cstate[cstate][macro_found? c->action1 : c->action2];
641 }
642
643 /* Having dealt with a directive, break the loop */
644
645 break;
646 }
647
648 /* If we have handled a conditional directive, continue with the next
649 physical line. Otherwise, fall through. */
650
651 if (i < cond_list_size) continue;
652 }
653
654 /* If the conditional state is not 0 (actively using these lines), ignore
655 this input line. */
656
657 if (cstate != 0) continue; /* Conditional skip */
658
659 /* Handle .include lines - these are also physical lines. */
660
661 if (Ustrncmp(ss, ".include", 8) == 0 &&
662 (isspace(ss[8]) ||
663 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
664 {
665 uschar *t;
666 int include_if_exists = isspace(ss[8])? 0 : 10;
667 config_file_item *save;
668 struct stat statbuf;
669
670 ss += 9 + include_if_exists;
671 while (isspace(*ss)) ss++;
672 t = ss + Ustrlen(ss);
673 while (t > ss && isspace(t[-1])) t--;
674 if (*ss == '\"' && t[-1] == '\"')
675 {
676 ss++;
677 t--;
678 }
679 *t = 0;
680
681 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
682
683 save = store_get(sizeof(config_file_item));
684 save->next = config_file_stack;
685 config_file_stack = save;
686 save->file = config_file;
687 save->filename = config_filename;
688 save->lineno = config_lineno;
689
690 config_file = Ufopen(ss, "rb");
691 if (config_file == NULL)
692 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
693 "configuration file %s", ss);
694 config_filename = string_copy(ss);
695 config_lineno = 0;
696 continue;
697 }
698
699 /* If this is the start of the logical line, remember where the non-blank
700 data starts. Otherwise shuffle down continuation lines to remove leading
701 white space. */
702
703 if (len == 0)
704 startoffset = ss - big_buffer;
705 else
706 {
707 s = big_buffer + len;
708 if (ss > s)
709 {
710 memmove(s, ss, (newlen - len) - (ss - s) + 1);
711 newlen -= ss - s;
712 }
713 }
714
715 /* Accept the new addition to the line. Remove trailing white space. */
716
717 len = newlen;
718 while (len > 0 && isspace(big_buffer[len-1])) len--;
719 big_buffer[len] = 0;
720
721 /* We are done if the line does not end in backslash and contains some data.
722 Empty logical lines are ignored. For continuations, remove the backslash and
723 go round the loop to read the continuation line. */
724
725 if (len > 0)
726 {
727 if (big_buffer[len-1] != '\\') break; /* End of logical line */
728 big_buffer[--len] = 0; /* Remove backslash */
729 }
730 } /* Loop for reading multiple physical lines */
731
732 /* We now have a logical line. Test for the end of a configuration section (or,
733 more accurately, for the start of the next section). Place the name of the next
734 section in next_section, and return NULL. If the name given is longer than
735 next_section, truncate it. It will be unrecognized later, because all the known
736 section names do fit. Leave space for pluralizing. */
737
738 s = big_buffer + startoffset; /* First non-space character */
739 if (strncmpic(s, US"begin ", 6) == 0)
740 {
741 s += 6;
742 while (isspace(*s)) s++;
743 if (big_buffer + len - s > sizeof(next_section) - 2)
744 s[sizeof(next_section) - 2] = 0;
745 Ustrcpy(next_section, s);
746 return NULL;
747 }
748
749 /* Return the first non-blank character. */
750
751 return s;
752 }
753
754
755
756 /*************************************************
757 * Read a name *
758 *************************************************/
759
760 /* The yield is the pointer to the next uschar. Names longer than the
761 output space are silently truncated. This function is also used from acl.c when
762 parsing ACLs.
763
764 Arguments:
765 name where to put the name
766 len length of name
767 s input pointer
768
769 Returns: new input pointer
770 */
771
772 uschar *
773 readconf_readname(uschar *name, int len, uschar *s)
774 {
775 int p = 0;
776 while (isspace(*s)) s++;
777 if (isalpha(*s))
778 {
779 while (isalnum(*s) || *s == '_')
780 {
781 if (p < len-1) name[p++] = *s;
782 s++;
783 }
784 }
785 name[p] = 0;
786 while (isspace(*s)) s++;
787 return s;
788 }
789
790
791
792
793 /*************************************************
794 * Read a time value *
795 *************************************************/
796
797 /* This function is also called from outside, to read argument
798 time values. The format of a time value is:
799
800 [<n>w][<n>d][<n>h][<n>m][<n>s]
801
802 as long as at least one is present. If a format error is encountered,
803 return a negative value. The value must be terminated by the given
804 terminator.
805
806 Arguments:
807 s input pointer
808 terminator required terminating character
809 return_msec if TRUE, allow fractional seconds and return milliseconds
810
811 Returns: the time value, or -1 on syntax error
812 value is seconds if return_msec is FALSE
813 value is milliseconds if return_msec is TRUE
814 */
815
816 int
817 readconf_readtime(uschar *s, int terminator, BOOL return_msec)
818 {
819 int yield = 0;
820 for (;;)
821 {
822 int value, count;
823 double fraction;
824
825 if (!isdigit(*s)) return -1;
826 (void)sscanf(CS s, "%d%n", &value, &count);
827 s += count;
828
829 switch (*s)
830 {
831 case 'w': value *= 7;
832 case 'd': value *= 24;
833 case 'h': value *= 60;
834 case 'm': value *= 60;
835 case 's': s++;
836 break;
837
838 case '.':
839 if (!return_msec) return -1;
840 (void)sscanf(CS s, "%lf%n", &fraction, &count);
841 s += count;
842 if (*s++ != 's') return -1;
843 yield += (int)(fraction * 1000.0);
844 break;
845
846 default: return -1;
847 }
848
849 if (return_msec) value *= 1000;
850 yield += value;
851 if (*s == terminator) return yield;
852 }
853 /* Control never reaches here. */
854 }
855
856
857
858 /*************************************************
859 * Read a fixed point value *
860 *************************************************/
861
862 /* The value is returned *1000
863
864 Arguments:
865 s input pointer
866 terminator required terminator
867
868 Returns: the value, or -1 on error
869 */
870
871 static int
872 readconf_readfixed(uschar *s, int terminator)
873 {
874 int yield = 0;
875 int value, count;
876 if (!isdigit(*s)) return -1;
877 (void)sscanf(CS s, "%d%n", &value, &count);
878 s += count;
879 yield = value * 1000;
880 if (*s == '.')
881 {
882 int m = 100;
883 while (isdigit((*(++s))))
884 {
885 yield += (*s - '0') * m;
886 m /= 10;
887 }
888 }
889
890 return (*s == terminator)? yield : (-1);
891 }
892
893
894
895 /*************************************************
896 * Find option in list *
897 *************************************************/
898
899 /* The lists are always in order, so binary chop can be used.
900
901 Arguments:
902 name the option name to search for
903 ol the first entry in the option list
904 last one more than the offset of the last entry in the option list
905
906 Returns: pointer to an option entry, or NULL if not found
907 */
908
909 static optionlist *
910 find_option(uschar *name, optionlist *ol, int last)
911 {
912 int first = 0;
913 while (last > first)
914 {
915 int middle = (first + last)/2;
916 int c = Ustrcmp(name, ol[middle].name);
917 if (c == 0) return ol + middle;
918 else if (c > 0) first = middle + 1;
919 else last = middle;
920 }
921 return NULL;
922 }
923
924
925
926 /*************************************************
927 * Find a set flag in option list *
928 *************************************************/
929
930 /* Because some versions of Unix make no restrictions on the values of uids and
931 gids (even negative ones), we cannot represent "unset" by a special value.
932 There is therefore a separate boolean variable for each one indicating whether
933 a value is set or not. This function returns a pointer to the boolean, given
934 the original option name. It is a major disaster if the flag cannot be found.
935
936 Arguments:
937 name the name of the uid or gid option
938 oltop points to the start of the relevant option list
939 last one more than the offset of the last item in the option list
940 data_block NULL when reading main options => data values in the option
941 list are absolute addresses; otherwise they are byte offsets
942 in data_block (used for driver options)
943
944 Returns: a pointer to the boolean flag.
945 */
946
947 static BOOL *
948 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
949 {
950 optionlist *ol;
951 uschar name2[64];
952 sprintf(CS name2, "*set_%.50s", name);
953 ol = find_option(name2, oltop, last);
954 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
955 "Exim internal error: missing set flag for %s", name);
956 return (data_block == NULL)? (BOOL *)(ol->value) :
957 (BOOL *)((uschar *)data_block + (long int)(ol->value));
958 }
959
960
961
962
963 /*************************************************
964 * Output extra characters message and die *
965 *************************************************/
966
967 /* Called when an option line has junk on the end. Sometimes this is because
968 the sysadmin thinks comments are permitted.
969
970 Arguments:
971 s points to the extra characters
972 t1..t3 strings to insert in the log message
973
974 Returns: doesn't return; dies
975 */
976
977 static void
978 extra_chars_error(uschar *s, uschar *t1, uschar *t2, uschar *t3)
979 {
980 uschar *comment = US"";
981 if (*s == '#') comment = US" (# is comment only at line start)";
982 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
983 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
984 }
985
986
987
988 /*************************************************
989 * Read rewrite information *
990 *************************************************/
991
992 /* Each line of rewrite information contains:
993
994 . A complete address in the form user@domain, possibly with
995 leading * for each part; or alternatively, a regex.
996
997 . A replacement string (which will be expanded).
998
999 . An optional sequence of one-letter flags, indicating which
1000 headers etc. to apply this rule to.
1001
1002 All this is decoded and placed into a control block. The OR of the flags is
1003 maintained in a common word.
1004
1005 Arguments:
1006 p points to the string that makes up the rule
1007 existflags points to the overall flag word
1008 isglobal TRUE if reading global rewrite rules
1009
1010 Returns: the control block for the parsed rule.
1011 */
1012
1013 static rewrite_rule *
1014 readconf_one_rewrite(uschar *p, int *existflags, BOOL isglobal)
1015 {
1016 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1017
1018 next->next = NULL;
1019 next->key = string_dequote(&p);
1020
1021 while (isspace(*p)) p++;
1022 if (*p == 0)
1023 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1024 "missing rewrite replacement string");
1025
1026 next->flags = 0;
1027 next->replacement = string_dequote(&p);
1028
1029 while (*p != 0) switch (*p++)
1030 {
1031 case ' ': case '\t': break;
1032
1033 case 'q': next->flags |= rewrite_quit; break;
1034 case 'w': next->flags |= rewrite_whole; break;
1035
1036 case 'h': next->flags |= rewrite_all_headers; break;
1037 case 's': next->flags |= rewrite_sender; break;
1038 case 'f': next->flags |= rewrite_from; break;
1039 case 't': next->flags |= rewrite_to; break;
1040 case 'c': next->flags |= rewrite_cc; break;
1041 case 'b': next->flags |= rewrite_bcc; break;
1042 case 'r': next->flags |= rewrite_replyto; break;
1043
1044 case 'E': next->flags |= rewrite_all_envelope; break;
1045 case 'F': next->flags |= rewrite_envfrom; break;
1046 case 'T': next->flags |= rewrite_envto; break;
1047
1048 case 'Q': next->flags |= rewrite_qualify; break;
1049 case 'R': next->flags |= rewrite_repeat; break;
1050
1051 case 'S':
1052 next->flags |= rewrite_smtp;
1053 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1054 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1055 "rewrite rule has the S flag but is not a regular expression");
1056 break;
1057
1058 default:
1059 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1060 "unknown rewrite flag character '%c' "
1061 "(could be missing quotes round replacement item)", p[-1]);
1062 break;
1063 }
1064
1065 /* If no action flags are set, set all the "normal" rewrites. */
1066
1067 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1068 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1069
1070 /* Remember which exist, for optimization, and return the rule */
1071
1072 *existflags |= next->flags;
1073 return next;
1074 }
1075
1076
1077
1078
1079 /*************************************************
1080 * Read global rewrite information *
1081 *************************************************/
1082
1083 /* Each line is a single rewrite rule; it is parsed into a control block
1084 by readconf_one_rewrite(), and its flags are ORed into the global flag
1085 word rewrite_existflags. */
1086
1087 void
1088 readconf_rewrites(void)
1089 {
1090 rewrite_rule **chain = &global_rewrite_rules;
1091 uschar *p;
1092
1093 while ((p = get_config_line()) != NULL)
1094 {
1095 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1096 *chain = next;
1097 chain = &(next->next);
1098 }
1099 }
1100
1101
1102
1103 /*************************************************
1104 * Read a string *
1105 *************************************************/
1106
1107 /* Strings are read into the normal store pool. As long we aren't too
1108 near the end of the current block, the string will just use what is necessary
1109 on the top of the stacking pool, because string_cat() uses the extension
1110 mechanism.
1111
1112 Argument:
1113 s the rest of the input line
1114 name the option name (for errors)
1115
1116 Returns: pointer to the string
1117 */
1118
1119 static uschar *
1120 read_string(uschar *s, uschar *name)
1121 {
1122 uschar *yield;
1123 uschar *ss;
1124
1125 if (*s != '\"') return string_copy(s);
1126
1127 ss = s;
1128 yield = string_dequote(&s);
1129
1130 if (s == ss+1 || s[-1] != '\"')
1131 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1132 "missing quote at end of string value for %s", name);
1133
1134 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1135
1136 return yield;
1137 }
1138
1139
1140 /*************************************************
1141 * Handle option line *
1142 *************************************************/
1143
1144 /* This function is called from several places to process a line containing the
1145 setting of an option. The first argument is the line to be decoded; it has been
1146 checked not to be empty and not to start with '#'. Trailing newlines and white
1147 space have been removed. The second argument is a pointer to the list of
1148 variable names that are to be recognized, together with their types and
1149 locations, and the third argument gives the number of entries in the list.
1150
1151 The fourth argument is a pointer to a data block. If it is NULL, then the data
1152 values in the options list are absolute addresses. Otherwise, they are byte
1153 offsets in the data block.
1154
1155 String option data may continue onto several lines; this function reads further
1156 data from config_file if necessary.
1157
1158 The yield of this function is normally zero. If a string continues onto
1159 multiple lines, then the data value is permitted to be followed by a comma
1160 or a semicolon (for use in drivers) and the yield is that character.
1161
1162 Arguments:
1163 buffer contains the configuration line to be handled
1164 oltop points to the start of the relevant option list
1165 last one more than the offset of the last item in the option list
1166 data_block NULL when reading main options => data values in the option
1167 list are absolute addresses; otherwise they are byte offsets
1168 in data_block when they have opt_public set; otherwise
1169 they are byte offsets in data_block->options_block.
1170 unknown_txt format string to use in panic message for unknown option;
1171 must contain %s for option name
1172 if given as NULL, don't panic on unknown option
1173
1174 Returns: TRUE if an option was read successfully,
1175 FALSE false for an unknown option if unknown_txt == NULL,
1176 otherwise panic and die on an unknown option
1177 */
1178
1179 static BOOL
1180 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1181 void *data_block, uschar *unknown_txt)
1182 {
1183 int ptr = 0;
1184 int offset = 0;
1185 int n, count, type, value;
1186 int issecure = 0;
1187 uid_t uid;
1188 gid_t gid;
1189 BOOL boolvalue = TRUE;
1190 BOOL freesptr = TRUE;
1191 optionlist *ol, *ol2;
1192 struct passwd *pw;
1193 void *reset_point;
1194 int intbase = 0;
1195 uschar *inttype = US"";
1196 uschar *sptr;
1197 uschar *s = buffer;
1198 uschar name[64];
1199 uschar name2[64];
1200
1201 /* There may be leading spaces; thereafter, we expect an option name starting
1202 with a letter. */
1203
1204 while (isspace(*s)) s++;
1205 if (!isalpha(*s))
1206 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1207
1208 /* Read the name of the option, and skip any subsequent white space. If
1209 it turns out that what we read was "hide", set the flag indicating that
1210 this is a secure option, and loop to read the next word. */
1211
1212 for (n = 0; n < 2; n++)
1213 {
1214 while (isalnum(*s) || *s == '_')
1215 {
1216 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1217 s++;
1218 }
1219 name[ptr] = 0;
1220 while (isspace(*s)) s++;
1221 if (Ustrcmp(name, "hide") != 0) break;
1222 issecure = opt_secure;
1223 ptr = 0;
1224 }
1225
1226 /* Deal with "no_" or "not_" here for booleans */
1227
1228 if (Ustrncmp(name, "no_", 3) == 0)
1229 {
1230 boolvalue = FALSE;
1231 offset = 3;
1232 }
1233
1234 if (Ustrncmp(name, "not_", 4) == 0)
1235 {
1236 boolvalue = FALSE;
1237 offset = 4;
1238 }
1239
1240 /* Search the list for the given name. A non-existent name, or an option that
1241 is set twice, is a disaster. */
1242
1243 ol = find_option(name + offset, oltop, last);
1244
1245 if (ol == NULL)
1246 {
1247 if (unknown_txt == NULL) return FALSE;
1248 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1249 }
1250
1251 if ((ol->type & opt_set) != 0)
1252 {
1253 uschar *mname = name;
1254 if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
1255 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1256 "\"%s\" option set for the second time", mname);
1257 }
1258
1259 ol->type |= opt_set | issecure;
1260 type = ol->type & opt_mask;
1261
1262 /* Types with data values must be followed by '='; the "no[t]_" prefix
1263 applies only to boolean values. */
1264
1265 if (type < opt_bool || type > opt_bool_last)
1266 {
1267 if (offset != 0)
1268 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1269 "negation prefix applied to a non-boolean option");
1270 if (*s == 0)
1271 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1272 "unexpected end of line (data missing) after %s", name);
1273 if (*s != '=')
1274 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1275 }
1276
1277 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1278 true/false/yes/no, or, in the case of opt_expanded_bool, a general string that
1279 ultimately expands to one of those values. */
1280
1281 else if (*s != 0 && (offset != 0 || *s != '='))
1282 extra_chars_error(s, US"boolean option ", name, US"");
1283
1284 /* Skip white space after = */
1285
1286 if (*s == '=') while (isspace((*(++s))));
1287
1288 /* If there is a data block and the opt_public flag is not set, change
1289 the data block pointer to the private options block. */
1290
1291 if (data_block != NULL && (ol->type & opt_public) == 0)
1292 data_block = (void *)(((driver_instance *)data_block)->options_block);
1293
1294 /* Now get the data according to the type. */
1295
1296 switch (type)
1297 {
1298 /* If a string value is not enclosed in quotes, it consists of
1299 the rest of the current line, verbatim. Otherwise, string escapes
1300 are processed.
1301
1302 A transport is specified as a string, which is then looked up in the
1303 list of transports. A search type is specified as one of a number of
1304 known strings.
1305
1306 A set or rewrite rules for a driver is specified as a string, which is
1307 then parsed into a suitable chain of control blocks.
1308
1309 Uids and gids are specified as strings which are then looked up in the
1310 passwd file. Lists of uids and gids are similarly specified as colon-
1311 separated strings. */
1312
1313 case opt_stringptr:
1314 case opt_uid:
1315 case opt_gid:
1316 case opt_expand_uid:
1317 case opt_expand_gid:
1318 case opt_uidlist:
1319 case opt_gidlist:
1320 case opt_rewrite:
1321
1322 reset_point = sptr = read_string(s, name);
1323
1324 /* Having read a string, we now have several different ways of using it,
1325 depending on the data type, so do another switch. If keeping the actual
1326 string is not required (because it is interpreted), freesptr is set TRUE,
1327 and at the end we reset the pool. */
1328
1329 switch (type)
1330 {
1331 /* If this was a string, set the variable to point to the new string,
1332 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1333 rules, we still keep the string (for printing), and parse the rules into a
1334 control block and flags word. */
1335
1336 case opt_stringptr:
1337 case opt_rewrite:
1338 if (data_block == NULL)
1339 *((uschar **)(ol->value)) = sptr;
1340 else
1341 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1342 freesptr = FALSE;
1343 if (type == opt_rewrite)
1344 {
1345 int sep = 0;
1346 int *flagptr;
1347 uschar *p = sptr;
1348 rewrite_rule **chain;
1349 optionlist *ol3;
1350
1351 sprintf(CS name2, "*%.50s_rules", name);
1352 ol2 = find_option(name2, oltop, last);
1353 sprintf(CS name2, "*%.50s_flags", name);
1354 ol3 = find_option(name2, oltop, last);
1355
1356 if (ol2 == NULL || ol3 == NULL)
1357 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1358 "rewrite rules not available for driver");
1359
1360 if (data_block == NULL)
1361 {
1362 chain = (rewrite_rule **)(ol2->value);
1363 flagptr = (int *)(ol3->value);
1364 }
1365 else
1366 {
1367 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1368 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1369 }
1370
1371 while ((p = string_nextinlist(&sptr, &sep, big_buffer, BIG_BUFFER_SIZE))
1372 != NULL)
1373 {
1374 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1375 *chain = next;
1376 chain = &(next->next);
1377 }
1378
1379 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1380 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1381 "non-header rewrite - not allowed at transport time -");
1382 }
1383 break;
1384
1385 /* If it was an expanded uid, see if there is any expansion to be
1386 done by checking for the presence of a $ character. If there is, save it
1387 in the corresponding *expand_user option field. Otherwise, fall through
1388 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1389 of data. */
1390
1391 case opt_expand_uid:
1392 sprintf(CS name2, "*expand_%.50s", name);
1393 ol2 = find_option(name2, oltop, last);
1394 if (ol2 != NULL)
1395 {
1396 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1397
1398 if (data_block == NULL)
1399 *((uschar **)(ol2->value)) = ss;
1400 else
1401 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1402
1403 if (ss != NULL)
1404 {
1405 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1406 freesptr = FALSE;
1407 break;
1408 }
1409 }
1410
1411 /* Look up a fixed uid, and also make use of the corresponding gid
1412 if a passwd entry is returned and the gid has not been set. */
1413
1414 case opt_uid:
1415 if (!route_finduser(sptr, &pw, &uid))
1416 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1417 if (data_block == NULL)
1418 *((uid_t *)(ol->value)) = uid;
1419 else
1420 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1421
1422 /* Set the flag indicating a fixed value is set */
1423
1424 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1425
1426 /* Handle matching gid if we have a passwd entry: done by finding the
1427 same name with terminating "user" changed to "group"; if not found,
1428 ignore. Also ignore if the value is already set. */
1429
1430 if (pw == NULL) break;
1431 Ustrcpy(name+Ustrlen(name)-4, "group");
1432 ol2 = find_option(name, oltop, last);
1433 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1434 (ol2->type & opt_mask) == opt_expand_gid))
1435 {
1436 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1437 if (! *set_flag)
1438 {
1439 if (data_block == NULL)
1440 *((gid_t *)(ol2->value)) = pw->pw_gid;
1441 else
1442 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1443 *set_flag = TRUE;
1444 }
1445 }
1446 break;
1447
1448 /* If it was an expanded gid, see if there is any expansion to be
1449 done by checking for the presence of a $ character. If there is, save it
1450 in the corresponding *expand_user option field. Otherwise, fall through
1451 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1452 of data. */
1453
1454 case opt_expand_gid:
1455 sprintf(CS name2, "*expand_%.50s", name);
1456 ol2 = find_option(name2, oltop, last);
1457 if (ol2 != NULL)
1458 {
1459 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1460
1461 if (data_block == NULL)
1462 *((uschar **)(ol2->value)) = ss;
1463 else
1464 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1465
1466 if (ss != NULL)
1467 {
1468 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1469 freesptr = FALSE;
1470 break;
1471 }
1472 }
1473
1474 /* Handle freestanding gid */
1475
1476 case opt_gid:
1477 if (!route_findgroup(sptr, &gid))
1478 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1479 if (data_block == NULL)
1480 *((gid_t *)(ol->value)) = gid;
1481 else
1482 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1483 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1484 break;
1485
1486 /* If it was a uid list, look up each individual entry, and build
1487 a vector of uids, with a count in the first element. Put the vector
1488 in malloc store so we can free the string. (We are reading into
1489 permanent store already.) */
1490
1491 case opt_uidlist:
1492 {
1493 int count = 1;
1494 uid_t *list;
1495 int ptr = 0;
1496 uschar *p = sptr;
1497
1498 if (*p != 0) count++;
1499 while (*p != 0) if (*p++ == ':') count++;
1500 list = store_malloc(count*sizeof(uid_t));
1501 list[ptr++] = (uid_t)(count - 1);
1502
1503 if (data_block == NULL)
1504 *((uid_t **)(ol->value)) = list;
1505 else
1506 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1507
1508 p = sptr;
1509 while (count-- > 1)
1510 {
1511 int sep = 0;
1512 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1513 if (!route_finduser(big_buffer, NULL, &uid))
1514 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1515 big_buffer);
1516 list[ptr++] = uid;
1517 }
1518 }
1519 break;
1520
1521 /* If it was a gid list, look up each individual entry, and build
1522 a vector of gids, with a count in the first element. Put the vector
1523 in malloc store so we can free the string. (We are reading into permanent
1524 store already.) */
1525
1526 case opt_gidlist:
1527 {
1528 int count = 1;
1529 gid_t *list;
1530 int ptr = 0;
1531 uschar *p = sptr;
1532
1533 if (*p != 0) count++;
1534 while (*p != 0) if (*p++ == ':') count++;
1535 list = store_malloc(count*sizeof(gid_t));
1536 list[ptr++] = (gid_t)(count - 1);
1537
1538 if (data_block == NULL)
1539 *((gid_t **)(ol->value)) = list;
1540 else
1541 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1542
1543 p = sptr;
1544 while (count-- > 1)
1545 {
1546 int sep = 0;
1547 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1548 if (!route_findgroup(big_buffer, &gid))
1549 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1550 big_buffer);
1551 list[ptr++] = gid;
1552 }
1553 }
1554 break;
1555 }
1556
1557 /* Release store if the value of the string doesn't need to be kept. */
1558
1559 if (freesptr) store_reset(reset_point);
1560 break;
1561
1562 /* Expanded boolean: if no characters follow, or if there are no dollar
1563 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1564 save the string for later expansion in the alternate place. */
1565
1566 case opt_expand_bool:
1567 if (*s != 0 && Ustrchr(s, '$') != 0)
1568 {
1569 sprintf(CS name2, "*expand_%.50s", name);
1570 ol2 = find_option(name2, oltop, last);
1571 if (ol2 != NULL)
1572 {
1573 reset_point = sptr = read_string(s, name);
1574 if (data_block == NULL)
1575 *((uschar **)(ol2->value)) = sptr;
1576 else
1577 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1578 freesptr = FALSE;
1579 break;
1580 }
1581 }
1582 /* Fall through */
1583
1584 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1585 look for yes/not/true/false. Some booleans are stored in a single bit in
1586 a single int. There's a special fudge for verify settings; without a suffix
1587 they set both xx_sender and xx_recipient. The table points to the sender
1588 value; search subsequently for the recipient. There's another special case:
1589 opt_bool_set also notes when a boolean has been set. */
1590
1591 case opt_bool:
1592 case opt_bit:
1593 case opt_bool_verify:
1594 case opt_bool_set:
1595 if (*s != 0)
1596 {
1597 s = readconf_readname(name2, 64, s);
1598 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1599 boolvalue = TRUE;
1600 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1601 boolvalue = FALSE;
1602 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1603 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1604 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1605 US"for boolean option ", name);
1606 }
1607
1608 /* Handle single-bit type. */
1609
1610 if (type == opt_bit)
1611 {
1612 int bit = 1 << ((ol->type >> 16) & 31);
1613 int *ptr = (data_block == NULL)?
1614 (int *)(ol->value) :
1615 (int *)((uschar *)data_block + (long int)ol->value);
1616 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1617 break;
1618 }
1619
1620 /* Handle full BOOL types */
1621
1622 if (data_block == NULL)
1623 *((BOOL *)(ol->value)) = boolvalue;
1624 else
1625 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1626
1627 /* Verify fudge */
1628
1629 if (type == opt_bool_verify)
1630 {
1631 sprintf(CS name2, "%.50s_recipient", name + offset);
1632 ol2 = find_option(name2, oltop, last);
1633 if (ol2 != NULL)
1634 {
1635 if (data_block == NULL)
1636 *((BOOL *)(ol2->value)) = boolvalue;
1637 else
1638 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1639 }
1640 }
1641
1642 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1643
1644 else if (type == opt_bool_set)
1645 {
1646 sprintf(CS name2, "*set_%.50s", name + offset);
1647 ol2 = find_option(name2, oltop, last);
1648 if (ol2 != NULL)
1649 {
1650 if (data_block == NULL)
1651 *((BOOL *)(ol2->value)) = TRUE;
1652 else
1653 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1654 }
1655 }
1656 break;
1657
1658 /* Octal integer */
1659
1660 case opt_octint:
1661 intbase = 8;
1662 inttype = US"octal ";
1663
1664 /* Integer: a simple(ish) case; allow octal and hex formats, and
1665 suffixes K and M. The different types affect output, not input. */
1666
1667 case opt_mkint:
1668 case opt_int:
1669 {
1670 uschar *endptr;
1671 errno = 0;
1672 value = strtol(CS s, CSS &endptr, intbase);
1673
1674 if (endptr == s)
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1676 inttype, name);
1677
1678 if (errno != ERANGE)
1679 {
1680 if (tolower(*endptr) == 'k')
1681 {
1682 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1683 else value *= 1024;
1684 endptr++;
1685 }
1686 else if (tolower(*endptr) == 'm')
1687 {
1688 if (value > INT_MAX/(1024*1024) || value < INT_MIN/(1024*1024))
1689 errno = ERANGE;
1690 else value *= 1024*1024;
1691 endptr++;
1692 }
1693 }
1694
1695 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1696 "absolute value of integer \"%s\" is too large (overflow)", s);
1697
1698 while (isspace(*endptr)) endptr++;
1699 if (*endptr != 0)
1700 extra_chars_error(endptr, inttype, US"integer value for ", name);
1701 }
1702
1703 if (data_block == NULL)
1704 *((int *)(ol->value)) = value;
1705 else
1706 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1707 break;
1708
1709 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
1710 M. */
1711
1712 case opt_Kint:
1713 {
1714 uschar *endptr;
1715 errno = 0;
1716 value = strtol(CS s, CSS &endptr, intbase);
1717
1718 if (endptr == s)
1719 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1720 inttype, name);
1721
1722 if (errno != ERANGE)
1723 {
1724 if (tolower(*endptr) == 'm')
1725 {
1726 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
1727 else value *= 1024;
1728 endptr++;
1729 }
1730 else if (tolower(*endptr) == 'k')
1731 {
1732 endptr++;
1733 }
1734 else
1735 {
1736 value = (value + 512)/1024;
1737 }
1738 }
1739
1740 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1741 "absolute value of integer \"%s\" is too large (overflow)", s);
1742
1743 while (isspace(*endptr)) endptr++;
1744 if (*endptr != 0)
1745 extra_chars_error(endptr, inttype, US"integer value for ", name);
1746 }
1747
1748 if (data_block == NULL)
1749 *((int *)(ol->value)) = value;
1750 else
1751 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1752 break;
1753
1754 /* Fixed-point number: held to 3 decimal places. */
1755
1756 case opt_fixed:
1757 if (sscanf(CS s, "%d%n", &value, &count) != 1)
1758 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1759 "fixed-point number expected for %s", name);
1760
1761 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1762 "integer \"%s\" is too large (overflow)", s);
1763
1764 value *= 1000;
1765
1766 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1767 "integer \"%s\" is too large (overflow)", s);
1768
1769 if (s[count] == '.')
1770 {
1771 int d = 100;
1772 while (isdigit(s[++count]))
1773 {
1774 value += (s[count] - '0') * d;
1775 d /= 10;
1776 }
1777 }
1778
1779 while (isspace(s[count])) count++;
1780
1781 if (s[count] != 0)
1782 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
1783
1784 if (data_block == NULL)
1785 *((int *)(ol->value)) = value;
1786 else
1787 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1788 break;
1789
1790 /* There's a special routine to read time values. */
1791
1792 case opt_time:
1793 value = readconf_readtime(s, 0, FALSE);
1794 if (value < 0)
1795 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1796 name);
1797 if (data_block == NULL)
1798 *((int *)(ol->value)) = value;
1799 else
1800 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
1801 break;
1802
1803 /* A time list is a list of colon-separated times, with the first
1804 element holding the size of the list and the second the number of
1805 entries used. */
1806
1807 case opt_timelist:
1808 {
1809 int count = 0;
1810 int *list = (data_block == NULL)?
1811 (int *)(ol->value) :
1812 (int *)((uschar *)data_block + (long int)(ol->value));
1813
1814 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
1815 {
1816 int terminator = 0;
1817 uschar *snext = Ustrchr(s, ':');
1818 if (snext != NULL)
1819 {
1820 uschar *ss = snext;
1821 while (ss > s && isspace(ss[-1])) ss--;
1822 terminator = *ss;
1823 }
1824 value = readconf_readtime(s, terminator, FALSE);
1825 if (value < 0)
1826 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1827 name);
1828 if (count > 1 && value <= list[count])
1829 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1830 "time value out of order for %s", name);
1831 list[count+1] = value;
1832 if (snext == NULL) break;
1833 s = snext + 1;
1834 while (isspace(*s)) s++;
1835 }
1836
1837 if (count > list[0] - 2)
1838 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
1839 name);
1840 if (count > 0 && list[2] == 0) count = 0;
1841 list[1] = count;
1842 }
1843
1844 break;
1845 }
1846
1847 return TRUE;
1848 }
1849
1850
1851
1852 /*************************************************
1853 * Print a time value *
1854 *************************************************/
1855
1856 /*
1857 Argument: a time value in seconds
1858 Returns: pointer to a fixed buffer containing the time as a string,
1859 in readconf_readtime() format
1860 */
1861
1862 uschar *
1863 readconf_printtime(int t)
1864 {
1865 int s, m, h, d, w;
1866 uschar *p = time_buffer;
1867
1868 s = t % 60;
1869 t /= 60;
1870 m = t % 60;
1871 t /= 60;
1872 h = t % 24;
1873 t /= 24;
1874 d = t % 7;
1875 w = t/7;
1876
1877 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
1878 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
1879 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
1880 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
1881 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
1882
1883 return time_buffer;
1884 }
1885
1886
1887
1888 /*************************************************
1889 * Print an individual option value *
1890 *************************************************/
1891
1892 /* This is used by the -bP option, so prints to the standard output.
1893 The entire options list is passed in as an argument, because some options come
1894 in pairs - typically uid/gid settings, which can either be explicit numerical
1895 values, or strings to be expanded later. If the numerical value is unset,
1896 search for "*expand_<name>" to see if there is a string equivalent.
1897
1898 Arguments:
1899 ol option entry, or NULL for an unknown option
1900 name option name
1901 options_block NULL for main configuration options; otherwise points to
1902 a driver block; if the option doesn't have opt_public
1903 set, then options_block->options_block is where the item
1904 resides.
1905 oltop points to the option list in which ol exists
1906 last one more than the offset of the last entry in optop
1907
1908 Returns: nothing
1909 */
1910
1911 static void
1912 print_ol(optionlist *ol, uschar *name, void *options_block,
1913 optionlist *oltop, int last)
1914 {
1915 struct passwd *pw;
1916 struct group *gr;
1917 optionlist *ol2;
1918 void *value;
1919 uid_t *uidlist;
1920 gid_t *gidlist;
1921 uschar *s;
1922 uschar name2[64];
1923
1924 if (ol == NULL)
1925 {
1926 printf("%s is not a known option\n", name);
1927 return;
1928 }
1929
1930 /* Non-admin callers cannot see options that have been flagged secure by the
1931 "hide" prefix. */
1932
1933 if (!admin_user && (ol->type & opt_secure) != 0)
1934 {
1935 printf("%s = <value not displayable>\n", name);
1936 return;
1937 }
1938
1939 /* Else show the value of the option */
1940
1941 value = ol->value;
1942 if (options_block != NULL)
1943 {
1944 if ((ol->type & opt_public) == 0)
1945 options_block = (void *)(((driver_instance *)options_block)->options_block);
1946 value = (void *)((uschar *)options_block + (long int)value);
1947 }
1948
1949 switch(ol->type & opt_mask)
1950 {
1951 case opt_stringptr:
1952 case opt_rewrite: /* Show the text value */
1953 s = *((uschar **)value);
1954 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
1955 break;
1956
1957 case opt_int:
1958 printf("%s = %d\n", name, *((int *)value));
1959 break;
1960
1961 case opt_mkint:
1962 {
1963 int x = *((int *)value);
1964 if (x != 0 && (x & 1023) == 0)
1965 {
1966 int c = 'K';
1967 x >>= 10;
1968 if ((x & 1023) == 0)
1969 {
1970 c = 'M';
1971 x >>= 10;
1972 }
1973 printf("%s = %d%c\n", name, x, c);
1974 }
1975 else printf("%s = %d\n", name, x);
1976 }
1977 break;
1978
1979 case opt_Kint:
1980 {
1981 int x = *((int *)value);
1982 if (x == 0) printf("%s = 0\n", name);
1983 else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
1984 else printf("%s = %dK\n", name, x);
1985 }
1986 break;
1987
1988 case opt_octint:
1989 printf("%s = %#o\n", name, *((int *)value));
1990 break;
1991
1992 /* Can be negative only when "unset", in which case integer */
1993
1994 case opt_fixed:
1995 {
1996 int x = *((int *)value);
1997 int f = x % 1000;
1998 int d = 100;
1999 if (x < 0) printf("%s =\n", name); else
2000 {
2001 printf("%s = %d.", name, x/1000);
2002 do
2003 {
2004 printf("%d", f/d);
2005 f %= d;
2006 d /= 10;
2007 }
2008 while (f != 0);
2009 printf("\n");
2010 }
2011 }
2012 break;
2013
2014 /* If the numerical value is unset, try for the string value */
2015
2016 case opt_expand_uid:
2017 if (! *get_set_flag(name, oltop, last, options_block))
2018 {
2019 sprintf(CS name2, "*expand_%.50s", name);
2020 ol2 = find_option(name2, oltop, last);
2021 if (ol2 != NULL)
2022 {
2023 void *value2 = ol2->value;
2024 if (options_block != NULL)
2025 value2 = (void *)((uschar *)options_block + (long int)value2);
2026 s = *((uschar **)value2);
2027 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2028 break;
2029 }
2030 }
2031
2032 /* Else fall through */
2033
2034 case opt_uid:
2035 if (! *get_set_flag(name, oltop, last, options_block))
2036 printf("%s =\n", name);
2037 else
2038 {
2039 pw = getpwuid(*((uid_t *)value));
2040 if (pw == NULL)
2041 printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
2042 else printf("%s = %s\n", name, pw->pw_name);
2043 }
2044 break;
2045
2046 /* If the numerical value is unset, try for the string value */
2047
2048 case opt_expand_gid:
2049 if (! *get_set_flag(name, oltop, last, options_block))
2050 {
2051 sprintf(CS name2, "*expand_%.50s", name);
2052 ol2 = find_option(name2, oltop, last);
2053 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2054 {
2055 void *value2 = ol2->value;
2056 if (options_block != NULL)
2057 value2 = (void *)((uschar *)options_block + (long int)value2);
2058 s = *((uschar **)value2);
2059 printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
2060 break;
2061 }
2062 }
2063
2064 /* Else fall through */
2065
2066 case opt_gid:
2067 if (! *get_set_flag(name, oltop, last, options_block))
2068 printf("%s =\n", name);
2069 else
2070 {
2071 gr = getgrgid(*((int *)value));
2072 if (gr == NULL)
2073 printf("%s = %ld\n", name, (long int)(*((int *)value)));
2074 else printf("%s = %s\n", name, gr->gr_name);
2075 }
2076 break;
2077
2078 case opt_uidlist:
2079 uidlist = *((uid_t **)value);
2080 printf("%s =", name);
2081 if (uidlist != NULL)
2082 {
2083 int i;
2084 uschar sep = ' ';
2085 for (i = 1; i <= (int)(uidlist[0]); i++)
2086 {
2087 uschar *name = NULL;
2088 pw = getpwuid(uidlist[i]);
2089 if (pw != NULL) name = US pw->pw_name;
2090 if (name != NULL) printf("%c%s", sep, name);
2091 else printf("%c%ld", sep, (long int)(uidlist[i]));
2092 sep = ':';
2093 }
2094 }
2095 printf("\n");
2096 break;
2097
2098 case opt_gidlist:
2099 gidlist = *((gid_t **)value);
2100 printf("%s =", name);
2101 if (gidlist != NULL)
2102 {
2103 int i;
2104 uschar sep = ' ';
2105 for (i = 1; i <= (int)(gidlist[0]); i++)
2106 {
2107 uschar *name = NULL;
2108 gr = getgrgid(gidlist[i]);
2109 if (gr != NULL) name = US gr->gr_name;
2110 if (name != NULL) printf("%c%s", sep, name);
2111 else printf("%c%ld", sep, (long int)(gidlist[i]));
2112 sep = ':';
2113 }
2114 }
2115 printf("\n");
2116 break;
2117
2118 case opt_time:
2119 printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
2120 break;
2121
2122 case opt_timelist:
2123 {
2124 int i;
2125 int *list = (int *)value;
2126 printf("%s = ", name);
2127 for (i = 0; i < list[1]; i++)
2128 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2129 printf("\n");
2130 }
2131 break;
2132
2133 case opt_bit:
2134 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2135 "" : "no_", name);
2136 break;
2137
2138 case opt_expand_bool:
2139 sprintf(CS name2, "*expand_%.50s", name);
2140 ol2 = find_option(name2, oltop, last);
2141 if (ol2 != NULL && ol2->value != NULL)
2142 {
2143 void *value2 = ol2->value;
2144 if (options_block != NULL)
2145 value2 = (void *)((uschar *)options_block + (long int)value2);
2146 s = *((uschar **)value2);
2147 if (s != NULL)
2148 {
2149 printf("%s = %s\n", name, string_printing(s));
2150 break;
2151 }
2152 /* s == NULL => string not set; fall through */
2153 }
2154
2155 /* Fall through */
2156
2157 case opt_bool:
2158 case opt_bool_verify:
2159 case opt_bool_set:
2160 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2161 break;
2162 }
2163 }
2164
2165
2166
2167 /*************************************************
2168 * Print value from main configuration *
2169 *************************************************/
2170
2171 /* This function, called as a result of encountering the -bP option,
2172 causes the value of any main configuration variable to be output if the
2173 second argument is NULL. There are some special values:
2174
2175 all print all main configuration options
2176 configure_file print the name of the configuration file
2177 routers print the routers' configurations
2178 transports print the transports' configuration
2179 authenticators print the authenticators' configuration
2180 router_list print a list of router names
2181 transport_list print a list of transport names
2182 authenticator_list print a list of authentication mechanism names
2183 +name print a named list item
2184 local_scan print the local_scan options
2185
2186 If the second argument is not NULL, it must be one of "router", "transport", or
2187 "authenticator" in which case the first argument identifies the driver whose
2188 options are to be printed.
2189
2190 Arguments:
2191 name option name if type == NULL; else driver name
2192 type NULL or driver type name, as described above
2193
2194 Returns: nothing
2195 */
2196
2197 void
2198 readconf_print(uschar *name, uschar *type)
2199 {
2200 BOOL names_only = FALSE;
2201 optionlist *ol;
2202 optionlist *ol2 = NULL;
2203 driver_instance *d = NULL;
2204 int size = 0;
2205
2206 if (type == NULL)
2207 {
2208 if (*name == '+')
2209 {
2210 int i;
2211 tree_node *t;
2212 BOOL found = FALSE;
2213 static uschar *types[] = { US"address", US"domain", US"host",
2214 US"localpart" };
2215 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2216 &hostlist_anchor, &localpartlist_anchor };
2217
2218 for (i = 0; i < 4; i++)
2219 {
2220 t = tree_search(*(anchors[i]), name+1);
2221 if (t != NULL)
2222 {
2223 found = TRUE;
2224 printf("%slist %s = %s\n", types[i], name+1,
2225 ((namedlist_block *)(t->data.ptr))->string);
2226 }
2227 }
2228
2229 if (!found)
2230 printf("no address, domain, host, or local part list called \"%s\" "
2231 "exists\n", name+1);
2232
2233 return;
2234 }
2235
2236 if (Ustrcmp(name, "configure_file") == 0)
2237 {
2238 printf("%s\n", CS config_main_filename);
2239 return;
2240 }
2241
2242 if (Ustrcmp(name, "all") == 0)
2243 {
2244 for (ol = optionlist_config;
2245 ol < optionlist_config + optionlist_config_size; ol++)
2246 {
2247 if ((ol->type & opt_hidden) == 0)
2248 print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
2249 }
2250 return;
2251 }
2252
2253 if (Ustrcmp(name, "local_scan") == 0)
2254 {
2255 #ifndef LOCAL_SCAN_HAS_OPTIONS
2256 printf("local_scan() options are not supported\n");
2257 #else
2258 for (ol = local_scan_options;
2259 ol < local_scan_options + local_scan_options_count; ol++)
2260 {
2261 print_ol(ol, US ol->name, NULL, local_scan_options,
2262 local_scan_options_count);
2263 }
2264 #endif
2265 return;
2266 }
2267
2268 if (Ustrcmp(name, "routers") == 0)
2269 {
2270 type = US"router";
2271 name = NULL;
2272 }
2273 else if (Ustrcmp(name, "transports") == 0)
2274 {
2275 type = US"transport";
2276 name = NULL;
2277 }
2278
2279 else if (Ustrcmp(name, "authenticators") == 0)
2280 {
2281 type = US"authenticator";
2282 name = NULL;
2283 }
2284
2285 else if (Ustrcmp(name, "authenticator_list") == 0)
2286 {
2287 type = US"authenticator";
2288 name = NULL;
2289 names_only = TRUE;
2290 }
2291
2292 else if (Ustrcmp(name, "router_list") == 0)
2293 {
2294 type = US"router";
2295 name = NULL;
2296 names_only = TRUE;
2297 }
2298 else if (Ustrcmp(name, "transport_list") == 0)
2299 {
2300 type = US"transport";
2301 name = NULL;
2302 names_only = TRUE;
2303 }
2304 else
2305 {
2306 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2307 name, NULL, optionlist_config, optionlist_config_size);
2308 return;
2309 }
2310 }
2311
2312 /* Handle the options for a router or transport. Skip options that are flagged
2313 as hidden. Some of these are options with names starting with '*', used for
2314 internal alternative representations of other options (which the printing
2315 function will sort out). Others are synonyms kept for backward compatibility.
2316 */
2317
2318 if (Ustrcmp(type, "router") == 0)
2319 {
2320 d = (driver_instance *)routers;
2321 ol2 = optionlist_routers;
2322 size = optionlist_routers_size;
2323 }
2324 else if (Ustrcmp(type, "transport") == 0)
2325 {
2326 d = (driver_instance *)transports;
2327 ol2 = optionlist_transports;
2328 size = optionlist_transports_size;
2329 }
2330 else if (Ustrcmp(type, "authenticator") == 0)
2331 {
2332 d = (driver_instance *)auths;
2333 ol2 = optionlist_auths;
2334 size = optionlist_auths_size;
2335 }
2336
2337 if (names_only)
2338 {
2339 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2340 return;
2341 }
2342
2343 /* Either search for a given driver, or print all of them */
2344
2345 for (; d != NULL; d = d->next)
2346 {
2347 if (name == NULL)
2348 printf("\n%s %s:\n", d->name, type);
2349 else if (Ustrcmp(d->name, name) != 0) continue;
2350
2351 for (ol = ol2; ol < ol2 + size; ol++)
2352 {
2353 if ((ol->type & opt_hidden) == 0)
2354 print_ol(ol, US ol->name, d, ol2, size);
2355 }
2356
2357 for (ol = d->info->options;
2358 ol < d->info->options + *(d->info->options_count); ol++)
2359 {
2360 if ((ol->type & opt_hidden) == 0)
2361 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
2362 }
2363 if (name != NULL) return;
2364 }
2365 if (name != NULL) printf("%s %s not found\n", type, name);
2366 }
2367
2368
2369
2370 /*************************************************
2371 * Read a named list item *
2372 *************************************************/
2373
2374 /* This function reads a name and a list (i.e. string). The name is used to
2375 save the list in a tree, sorted by its name. Each entry also has a number,
2376 which can be used for caching tests, but if the string contains any expansion
2377 items other than $key, the number is set negative to inhibit caching. This
2378 mechanism is used for domain, host, and address lists that are referenced by
2379 the "+name" syntax.
2380
2381 Arguments:
2382 anchorp points to the tree anchor
2383 numberp points to the current number for this tree
2384 max the maximum number permitted
2385 s the text of the option line, starting immediately after the name
2386 of the list type
2387 tname the name of the list type, for messages
2388
2389 Returns: nothing
2390 */
2391
2392 static void
2393 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2394 uschar *tname)
2395 {
2396 BOOL forcecache = FALSE;
2397 uschar *ss;
2398 tree_node *t;
2399 namedlist_block *nb = store_get(sizeof(namedlist_block));
2400
2401 if (Ustrncmp(s, "_cache", 6) == 0)
2402 {
2403 forcecache = TRUE;
2404 s += 6;
2405 }
2406
2407 if (!isspace(*s))
2408 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2409
2410 if (*numberp >= max)
2411 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2412 tname, max);
2413
2414 while (isspace(*s)) s++;
2415 ss = s;
2416 while (isalnum(*s) || *s == '_') s++;
2417 t = store_get(sizeof(tree_node) + s-ss);
2418 Ustrncpy(t->name, ss, s-ss);
2419 t->name[s-ss] = 0;
2420 while (isspace(*s)) s++;
2421
2422 if (!tree_insertnode(anchorp, t))
2423 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2424 "duplicate name \"%s\" for a named %s", t->name, tname);
2425
2426 t->data.ptr = nb;
2427 nb->number = *numberp;
2428 *numberp += 1;
2429
2430 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2431 "missing '=' after \"%s\"", t->name);
2432 while (isspace(*s)) s++;
2433 nb->string = read_string(s, t->name);
2434 nb->cache_data = NULL;
2435
2436 /* Check the string for any expansions; if any are found, mark this list
2437 uncacheable unless the user has explicited forced caching. */
2438
2439 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2440 }
2441
2442
2443
2444
2445 /*************************************************
2446 * Unpick data for a rate limit *
2447 *************************************************/
2448
2449 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2450 separate values.
2451
2452 Arguments:
2453 s string, in the form t,b,f,l
2454 where t is the threshold (integer)
2455 b is the initial delay (time)
2456 f is the multiplicative factor (fixed point)
2457 k is the maximum time (time)
2458 threshold where to store threshold
2459 base where to store base in milliseconds
2460 factor where to store factor in milliseconds
2461 limit where to store limit
2462
2463 Returns: nothing (panics on error)
2464 */
2465
2466 static void
2467 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2468 int *limit)
2469 {
2470 uschar bstring[16], lstring[16];
2471
2472 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2473 factor, lstring) == 4)
2474 {
2475 *base = readconf_readtime(bstring, 0, TRUE);
2476 *limit = readconf_readtime(lstring, 0, TRUE);
2477 if (*base >= 0 && *limit >= 0) return;
2478 }
2479 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2480 }
2481
2482
2483
2484
2485 /*************************************************
2486 * Read main configuration options *
2487 *************************************************/
2488
2489 /* This function is the first to be called for configuration reading. It
2490 opens the configuration file and reads general configuration settings until
2491 it reaches the end of the configuration section. The file is then left open so
2492 that the remaining configuration data can subsequently be read if needed for
2493 this run of Exim.
2494
2495 The configuration file must be owned either by root or exim, and be writeable
2496 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2497 in the config file, so the test is done on the compiled in values. A slight
2498 anomaly, to be carefully documented.
2499
2500 The name of the configuration file is taken from a list that is included in the
2501 binary of Exim. It can be altered from the command line, but if that is done,
2502 root privilege is immediately withdrawn unless the caller is root or exim.
2503 The first file on the list that exists is used.
2504
2505 For use on multiple systems that share file systems, first look for a
2506 configuration file whose name has the current node name on the end. If that is
2507 not found, try the generic name. For really contorted configurations, that run
2508 multiple Exims with different uid settings, first try adding the effective uid
2509 before the node name. These complications are going to waste resources on most
2510 systems. Therefore they are available only when requested by compile-time
2511 options. */
2512
2513 void
2514 readconf_main(void)
2515 {
2516 int sep = 0;
2517 struct stat statbuf;
2518 uschar *s, *filename;
2519 uschar *list = config_main_filelist;
2520
2521 /* Loop through the possible file names */
2522
2523 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2524 != NULL)
2525 {
2526 /* Cut out all the fancy processing unless specifically wanted */
2527
2528 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2529 uschar *suffix = filename + Ustrlen(filename);
2530
2531 /* Try for the node-specific file if a node name exists */
2532
2533 #ifdef CONFIGURE_FILE_USE_NODE
2534 struct utsname uts;
2535 if (uname(&uts) >= 0)
2536 {
2537 #ifdef CONFIGURE_FILE_USE_EUID
2538 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2539 config_file = Ufopen(filename, "rb");
2540 if (config_file == NULL)
2541 #endif /* CONFIGURE_FILE_USE_EUID */
2542 {
2543 sprintf(CS suffix, ".%.256s", uts.nodename);
2544 config_file = Ufopen(filename, "rb");
2545 }
2546 }
2547 #endif /* CONFIGURE_FILE_USE_NODE */
2548
2549 /* Otherwise, try the generic name, possibly with the euid added */
2550
2551 #ifdef CONFIGURE_FILE_USE_EUID
2552 if (config_file == NULL)
2553 {
2554 sprintf(CS suffix, ".%ld", (long int)original_euid);
2555 config_file = Ufopen(filename, "rb");
2556 }
2557 #endif /* CONFIGURE_FILE_USE_EUID */
2558
2559 /* Finally, try the unadorned name */
2560
2561 if (config_file == NULL)
2562 {
2563 *suffix = 0;
2564 config_file = Ufopen(filename, "rb");
2565 }
2566 #else /* if neither defined */
2567
2568 /* This is the common case when the fancy processing is not included. */
2569
2570 config_file = Ufopen(filename, "rb");
2571 #endif
2572
2573 /* If the file does not exist, continue to try any others. For any other
2574 error, break out (and die). */
2575
2576 if (config_file != NULL || errno != ENOENT) break;
2577 }
2578
2579 /* On success, save the name for verification; config_filename is used when
2580 logging configuration errors (it changes for .included files) whereas
2581 config_main_filename is the name shown by -bP. Failure to open a configuration
2582 file is a serious disaster. */
2583
2584 if (config_file != NULL)
2585 {
2586 config_filename = config_main_filename = string_copy(filename);
2587 }
2588 else
2589 {
2590 if (filename == NULL)
2591 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
2592 "%s", config_main_filelist);
2593 else
2594 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
2595 "configuration file %s", filename));
2596 }
2597
2598 /* Check the status of the file we have opened, unless it was specified on
2599 the command line, in which case privilege was given away at the start. */
2600
2601 if (!config_changed)
2602 {
2603 if (fstat(fileno(config_file), &statbuf) != 0)
2604 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
2605 big_buffer);
2606
2607 if ((statbuf.st_uid != root_uid && /* owner not root */
2608 statbuf.st_uid != exim_uid /* owner not exim */
2609 #ifdef CONFIGURE_OWNER
2610 && statbuf.st_uid != config_uid /* owner not the special one */
2611 #endif
2612 ) || /* or */
2613 (statbuf.st_gid != exim_gid /* group not exim & */
2614 #ifdef CONFIGURE_GROUP
2615 && statbuf.st_gid != config_gid /* group not the special one */
2616 #endif
2617 && (statbuf.st_mode & 020) != 0) || /* group writeable */
2618 /* or */
2619 ((statbuf.st_mode & 2) != 0)) /* world writeable */
2620
2621 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
2622 "wrong owner, group, or mode", big_buffer);
2623 }
2624
2625 /* Process the main configuration settings. They all begin with a lower case
2626 letter. If we see something starting with an upper case letter, it is taken as
2627 a macro definition. */
2628
2629 while ((s = get_config_line()) != NULL)
2630 {
2631 if (isupper(s[0]))
2632 {
2633 macro_item *m;
2634 macro_item *mlast = NULL;
2635 uschar name[64];
2636 int namelen = 0;
2637
2638 while (isalnum(*s) || *s == '_')
2639 {
2640 if (namelen >= sizeof(name) - 1)
2641 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2642 "macro name too long (maximum is %d characters)", sizeof(name) - 1);
2643 name[namelen++] = *s++;
2644 }
2645 name[namelen] = 0;
2646 while (isspace(*s)) s++;
2647 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2648 "malformed macro definition");
2649 while (isspace(*s)) s++;
2650
2651 /* If an existing macro of the same name was defined on the command line,
2652 we just skip this definition. Otherwise it's an error to attempt to
2653 redefine a macro. It is also an error to define a macro whose name begins
2654 with the name of a previously-defined macro. */
2655
2656 for (m = macros; m != NULL; m = m->next)
2657 {
2658 int len = Ustrlen(m->name);
2659
2660 if (Ustrcmp(m->name, name) == 0)
2661 {
2662 if (m->command_line) break;
2663 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
2664 "defined", name);
2665 }
2666
2667 if (len < namelen && Ustrstr(name, m->name) != NULL)
2668 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
2669 "a macro because previously defined macro \"%s\" is a substring",
2670 name, m->name);
2671
2672 mlast = m;
2673 }
2674 if (m != NULL) continue; /* Found an overriding command-line definition */
2675
2676 m = store_get(sizeof(macro_item) + namelen);
2677 m->next = NULL;
2678 m->command_line = FALSE;
2679 if (mlast == NULL) macros = m; else mlast->next = m;
2680
2681 /* This use of strcpy() is OK because we have obtained a block of store
2682 whose size is based on the length of "name". The definition of the
2683 macro_item structure includes a final vector called "name" which is one
2684 byte long. Thus, adding "namelen" gives us enough room to store the "name"
2685 string. */
2686
2687 Ustrcpy(m->name, name);
2688 m->replacement = string_copy(s);
2689 }
2690
2691 else if (Ustrncmp(s, "domainlist", 10) == 0)
2692 read_named_list(&domainlist_anchor, &domainlist_count,
2693 MAX_NAMED_LIST, s+10, US"domain list");
2694
2695 else if (Ustrncmp(s, "hostlist", 8) == 0)
2696 read_named_list(&hostlist_anchor, &hostlist_count,
2697 MAX_NAMED_LIST, s+8, US"host list");
2698
2699 else if (Ustrncmp(s, US"addresslist", 11) == 0)
2700 read_named_list(&addresslist_anchor, &addresslist_count,
2701 MAX_NAMED_LIST, s+11, US"address list");
2702
2703 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
2704 read_named_list(&localpartlist_anchor, &localpartlist_count,
2705 MAX_NAMED_LIST, s+13, US"local part list");
2706
2707 else
2708 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
2709 NULL, US"main option \"%s\" unknown");
2710 }
2711
2712
2713 /* If local_sender_retain is set, local_from_check must be unset. */
2714
2715 if (local_sender_retain && local_from_check)
2716 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
2717 "local_sender_retain are set; this combination is not allowed");
2718
2719 /* If the timezone string is empty, set it to NULL, implying no TZ variable
2720 wanted. */
2721
2722 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
2723
2724 /* remote_max_parallel must be > 0 */
2725
2726 if (remote_max_parallel <= 0) remote_max_parallel = 1;
2727
2728 /* The primary host name may be required for expansion of spool_directory
2729 and log_file_path, so make sure it is set asap. It is obtained from uname(),
2730 but if that yields an unqualified value, make a FQDN by using gethostbyname to
2731 canonize it. Some people like upper case letters in their host names, so we
2732 don't force the case. */
2733
2734 if (primary_hostname == NULL)
2735 {
2736 uschar *hostname;
2737 struct utsname uts;
2738 if (uname(&uts) < 0)
2739 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
2740 hostname = US uts.nodename;
2741
2742 if (Ustrchr(hostname, '.') == NULL)
2743 {
2744 int af = AF_INET;
2745 struct hostent *hostdata;
2746
2747 #if HAVE_IPV6
2748 if (dns_ipv4_lookup == NULL ||
2749 match_isinlist(hostname, &dns_ipv4_lookup, 0, NULL, NULL, MCL_DOMAIN,
2750 TRUE, NULL) != OK)
2751 af = AF_INET6;
2752 #else
2753 af = AF_INET;
2754 #endif
2755
2756 for (;;)
2757 {
2758 #if HAVE_IPV6
2759 #if HAVE_GETIPNODEBYNAME
2760 int error_num;
2761 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
2762 #else
2763 hostdata = gethostbyname2(CS hostname, af);
2764 #endif
2765 #else
2766 hostdata = gethostbyname(CS hostname);
2767 #endif
2768
2769 if (hostdata != NULL)
2770 {
2771 hostname = US hostdata->h_name;
2772 break;
2773 }
2774
2775 if (af == AF_INET) break;
2776 af = AF_INET;
2777 }
2778 }
2779
2780 primary_hostname = string_copy(hostname);
2781 }
2782
2783 /* Set up default value for smtp_active_hostname */
2784
2785 smtp_active_hostname = primary_hostname;
2786
2787 /* If spool_directory wasn't set in the build-time configuration, it must have
2788 got set above. Of course, writing to the log may not work if log_file_path is
2789 not set, but it will at least get to syslog or somewhere, with any luck. */
2790
2791 if (*spool_directory == 0)
2792 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
2793 "proceed");
2794
2795 /* Expand the spool directory name; it may, for example, contain the primary
2796 host name. Same comment about failure. */
2797
2798 s = expand_string(spool_directory);
2799 if (s == NULL)
2800 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
2801 "\"%s\": %s", spool_directory, expand_string_message);
2802 spool_directory = s;
2803
2804 /* Expand log_file_path, which must contain "%s" in any component that isn't
2805 the null string or "syslog". It is also allowed to contain one instance of %D.
2806 However, it must NOT contain % followed by anything else. */
2807
2808 if (*log_file_path != 0)
2809 {
2810 uschar *ss, *sss;
2811 int sep = ':'; /* Fixed for log file path */
2812 s = expand_string(log_file_path);
2813 if (s == NULL)
2814 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
2815 "\"%s\": %s", log_file_path, expand_string_message);
2816
2817 ss = s;
2818 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
2819 {
2820 uschar *t;
2821 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
2822 t = Ustrstr(sss, "%s");
2823 if (t == NULL)
2824 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
2825 "contain \"%%s\"", sss);
2826 *t = 'X';
2827 t = Ustrchr(sss, '%');
2828 if (t != NULL)
2829 {
2830 if (t[1] != 'D' || Ustrchr(t+2, '%') != NULL)
2831 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
2832 "unexpected \"%%\" character", s);
2833 }
2834 }
2835
2836 log_file_path = s;
2837 }
2838
2839 /* Interpret syslog_facility into an integer argument for 'ident' param to
2840 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
2841 leading "log_". */
2842
2843 if (syslog_facility_str != NULL)
2844 {
2845 int i;
2846 uschar *s = syslog_facility_str;
2847
2848 if ((Ustrlen(syslog_facility_str) >= 4) &&
2849 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
2850 s += 4;
2851
2852 for (i = 0; i < syslog_list_size; i++)
2853 {
2854 if (strcmpic(s, syslog_list[i].name) == 0)
2855 {
2856 syslog_facility = syslog_list[i].value;
2857 break;
2858 }
2859 }
2860
2861 if (i >= syslog_list_size)
2862 {
2863 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2864 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
2865 }
2866 }
2867
2868 /* Expand pid_file_path */
2869
2870 if (*pid_file_path != 0)
2871 {
2872 s = expand_string(pid_file_path);
2873 if (s == NULL)
2874 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
2875 "\"%s\": %s", pid_file_path, expand_string_message);
2876 pid_file_path = s;
2877 }
2878
2879 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
2880 message. */
2881
2882 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
2883
2884 /* Unpick the SMTP rate limiting options, if set */
2885
2886 if (smtp_ratelimit_mail != NULL)
2887 {
2888 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
2889 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
2890 }
2891
2892 if (smtp_ratelimit_rcpt != NULL)
2893 {
2894 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
2895 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
2896 }
2897
2898 /* The qualify domains default to the primary host name */
2899
2900 if (qualify_domain_sender == NULL)
2901 qualify_domain_sender = primary_hostname;
2902 if (qualify_domain_recipient == NULL)
2903 qualify_domain_recipient = qualify_domain_sender;
2904
2905 /* Setting system_filter_user in the configuration sets the gid as well if a
2906 name is given, but a numerical value does not. */
2907
2908 if (system_filter_uid_set && !system_filter_gid_set)
2909 {
2910 struct passwd *pw = getpwuid(system_filter_uid);
2911 if (pw == NULL)
2912 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
2913 (long int)system_filter_uid);
2914 system_filter_gid = pw->pw_gid;
2915 system_filter_gid_set = TRUE;
2916 }
2917
2918 /* If the errors_reply_to field is set, check that it is syntactically valid
2919 and ensure it contains a domain. */
2920
2921 if (errors_reply_to != NULL)
2922 {
2923 uschar *errmess;
2924 int start, end, domain;
2925 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
2926 &start, &end, &domain, FALSE);
2927
2928 if (recipient == NULL)
2929 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2930 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
2931
2932 if (domain == 0)
2933 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2934 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
2935 }
2936
2937 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
2938 smtp_accept_max must also be set. */
2939
2940 if (smtp_accept_max == 0 &&
2941 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
2942 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2943 "smtp_accept_max must be set if smtp_accept_queue or "
2944 "smtp_accept_max_per_host is set");
2945
2946 /* Set up the host number if anything is specified. It is an expanded string
2947 so that it can be computed from the host name, for example. We do this last
2948 so as to ensure that everything else is set up before the expansion. */
2949
2950 if (host_number_string != NULL)
2951 {
2952 uschar *end;
2953 uschar *s = expand_string(host_number_string);
2954 long int n = Ustrtol(s, &end, 0);
2955 while (isspace(*end)) end++;
2956 if (*end != 0)
2957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2958 "localhost_number value is not a number: %s", s);
2959 if (n > LOCALHOST_MAX)
2960 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2961 "localhost_number is greater than the maximum allowed value (%d)",
2962 LOCALHOST_MAX);
2963 host_number = n;
2964 }
2965
2966 #ifdef SUPPORT_TLS
2967 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
2968
2969 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
2970 tls_verify_certificates == NULL)
2971 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2972 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
2973 (tls_verify_hosts != NULL)? "" : "try_");
2974 #endif
2975 }
2976
2977
2978
2979 /*************************************************
2980 * Initialize one driver *
2981 *************************************************/
2982
2983 /* This is called once the driver's generic options, if any, have been read.
2984 We can now find the driver, set up defaults for the private options, and
2985 unset any "set" bits in the private options table (which might have been
2986 set by another incarnation of the same driver).
2987
2988 Arguments:
2989 d pointer to driver instance block, with generic
2990 options filled in
2991 drivers_available vector of available drivers
2992 size_of_info size of each block in drivers_available
2993 class class of driver, for error message
2994
2995 Returns: pointer to the driver info block
2996 */
2997
2998 static driver_info *
2999 init_driver(driver_instance *d, driver_info *drivers_available,
3000 int size_of_info, uschar *class)
3001 {
3002 driver_info *dd;
3003
3004 for (dd = drivers_available; dd->driver_name[0] != 0;
3005 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3006 {
3007 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3008 {
3009 int i;
3010 int len = dd->options_len;
3011 d->info = dd;
3012 d->options_block = store_get(len);
3013 memcpy(d->options_block, dd->options_block, len);
3014 for (i = 0; i < *(dd->options_count); i++)
3015 dd->options[i].type &= ~opt_set;
3016 return dd;
3017 }
3018 }
3019
3020 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3021 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3022
3023 return NULL; /* never obeyed */
3024 }
3025
3026
3027
3028
3029 /*************************************************
3030 * Initialize driver list *
3031 *************************************************/
3032
3033 /* This function is called for routers, transports, and authentication
3034 mechanisms. It reads the data from the current point in the configuration file
3035 up to the end of the section, and sets up a chain of instance blocks according
3036 to the file's contents. The file will already have been opened by a call to
3037 readconf_main, and must be left open for subsequent reading of further data.
3038
3039 Any errors cause a panic crash. Note that the blocks with names driver_info and
3040 driver_instance must map the first portions of all the _info and _instance
3041 blocks for this shared code to work.
3042
3043 Arguments:
3044 class "router", "transport", or "authenticator"
3045 anchor &routers, &transports, &auths
3046 drivers_available available drivers
3047 size_of_info size of each info block
3048 instance_default points to default data for an instance
3049 instance_size size of instance block
3050 driver_optionlist generic option list
3051 driver_optionlist_count count of generic option list
3052
3053 Returns: nothing
3054 */
3055
3056 void
3057 readconf_driver_init(
3058 uschar *class,
3059 driver_instance **anchor,
3060 driver_info *drivers_available,
3061 int size_of_info,
3062 void *instance_default,
3063 int instance_size,
3064 optionlist *driver_optionlist,
3065 int driver_optionlist_count)
3066 {
3067 driver_instance **p = anchor;
3068 driver_instance *d = NULL;
3069 uschar *buffer;
3070
3071 /* Now process the configuration lines */
3072
3073 while ((buffer = get_config_line()) != NULL)
3074 {
3075 uschar name[64];
3076
3077 /* Read the first name on the line and test for the start of a new driver.
3078 If this isn't the start of a new driver, the line will be re-read. */
3079
3080 uschar *s = readconf_readname(name, sizeof(name), buffer);
3081
3082 /* If the line starts with a name terminated by a colon, we are at the
3083 start of the definition of a new driver. The rest of the line must be
3084 blank. */
3085
3086 if (*s++ == ':')
3087 {
3088 int i;
3089
3090 /* Finish off initializing the previous driver. */
3091
3092 if (d != NULL)
3093 {
3094 if (d->driver_name == NULL)
3095 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3096 "no driver defined for %s \"%s\"", class, d->name);
3097 (d->info->init)(d);
3098 }
3099
3100 /* Check that we haven't already got a driver of this name */
3101
3102 for (d = *anchor; d != NULL; d = d->next)
3103 if (Ustrcmp(name, d->name) == 0)
3104 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3105 "there are two %ss called \"%s\"", class, name);
3106
3107 /* Set up a new driver instance data block on the chain, with
3108 its default values installed. */
3109
3110 d = store_get(instance_size);
3111 memcpy(d, instance_default, instance_size);
3112 *p = d;
3113 p = &(d->next);
3114 d->name = string_copy(name);
3115
3116 /* Clear out the "set" bits in the generic options */
3117
3118 for (i = 0; i < driver_optionlist_count; i++)
3119 driver_optionlist[i].type &= ~opt_set;
3120
3121 /* Check nothing more on this line, then do the next loop iteration. */
3122
3123 while (isspace(*s)) s++;
3124 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3125 continue;
3126 }
3127
3128 /* Give an error if we have not set up a current driver yet. */
3129
3130 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3131 "%s name missing", class);
3132
3133 /* First look to see if this is a generic option; if it is "driver",
3134 initialize the driver. If is it not a generic option, we can look for a
3135 private option provided that the driver has been previously set up. */
3136
3137 if (readconf_handle_option(buffer, driver_optionlist,
3138 driver_optionlist_count, d, NULL))
3139 {
3140 if (d->info == NULL && d->driver_name != NULL)
3141 init_driver(d, drivers_available, size_of_info, class);
3142 }
3143
3144 /* Handle private options - pass the generic block because some may
3145 live therein. A flag with each option indicates if it is in the public
3146 block. */
3147
3148 else if (d->info != NULL)
3149 {
3150 readconf_handle_option(buffer, d->info->options,
3151 *(d->info->options_count), d, US"option \"%s\" unknown");
3152 }
3153
3154 /* The option is not generic and the driver name has not yet been given. */
3155
3156 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3157 "(\"driver\" must be specified before any private options)", name);
3158 }
3159
3160 /* Run the initialization function for the final driver. */
3161
3162 if (d != NULL)
3163 {
3164 if (d->driver_name == NULL)
3165 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3166 "no driver defined for %s \"%s\"", class, d->name);
3167 (d->info->init)(d);
3168 }
3169 }
3170
3171
3172
3173 /*************************************************
3174 * Check driver dependency *
3175 *************************************************/
3176
3177 /* This function is passed a driver instance and a string. It checks whether
3178 any of the string options for the driver contains the given string as an
3179 expansion variable.
3180
3181 Arguments:
3182 d points to a driver instance block
3183 s the string to search for
3184
3185 Returns: TRUE if a dependency is found
3186 */
3187
3188 BOOL
3189 readconf_depends(driver_instance *d, uschar *s)
3190 {
3191 int count = *(d->info->options_count);
3192 optionlist *ol;
3193 uschar *ss;
3194
3195 for (ol = d->info->options; ol < d->info->options + count; ol++)
3196 {
3197 void *options_block;
3198 uschar *value;
3199 int type = ol->type & opt_mask;
3200 if (type != opt_stringptr) continue;
3201 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3202 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3203 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3204 {
3205 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3206 isalnum(ss[Ustrlen(s)])) continue;
3207 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3208 d->name, ol->name, s);
3209 return TRUE;
3210 }
3211 }
3212
3213 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3214 return FALSE;
3215 }
3216
3217
3218
3219
3220 /*************************************************
3221 * Decode an error type for retries *
3222 *************************************************/
3223
3224 /* This function is global because it is also called from the main
3225 program when testing retry information. It decodes strings such as "quota_7d"
3226 into numerical error codes.
3227
3228 Arguments:
3229 pp points to start of text
3230 p points past end of text
3231 basic_errno points to an int to receive the main error number
3232 more_errno points to an int to receive the secondary error data
3233
3234 Returns: NULL if decoded correctly; else points to error text
3235 */
3236
3237 uschar *
3238 readconf_retry_error(uschar *pp, uschar *p, int *basic_errno, int *more_errno)
3239 {
3240 int len;
3241 uschar *q = pp;
3242 while (q < p && *q != '_') q++;
3243 len = q - pp;
3244
3245 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3246 {
3247 *basic_errno = ERRNO_EXIMQUOTA;
3248 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3249 return US"bad time value";
3250 }
3251
3252 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3253 {
3254 *basic_errno = ECONNREFUSED;
3255 if (q != p)
3256 {
3257 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3258 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3259 else return US"A or MX expected after \"refused\"";
3260 }
3261 }
3262
3263 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3264 {
3265 *basic_errno = ETIMEDOUT;
3266 if (q != p)
3267 {
3268 int i;
3269 int xlen = p - q - 1;
3270 uschar *x = q + 1;
3271
3272 static uschar *extras[] =
3273 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3274 static int values[] =
3275 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3276
3277 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3278 {
3279 if (strncmpic(x, extras[i], xlen) == 0)
3280 {
3281 *more_errno = values[i];
3282 break;
3283 }
3284 }