-
Notifications
You must be signed in to change notification settings - Fork 3
/
Copy pathdaemon.c
1744 lines (1463 loc) · 49.2 KB
/
daemon.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (c) Regents of The University of Michigan
* See COPYING.
*/
#include <config.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/file.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include <unistd.h>
#ifdef __linux__
#include <sys/prctl.h>
#endif /* __linux__ */
#ifdef HAVE_LIBSSL
#include "tls.h"
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#endif /* HAVE_LIBSSL */
#include "argcargv.h"
#include "envelope.h"
#include "ll.h"
#include "q_cleanup.h"
#include "queue.h"
#include "simta.h"
#include "simta_malloc.h"
#ifdef HAVE_LDAP
#include "simta_ldap.h"
#endif /* HAVE_LDAP */
#ifdef HAVE_LIBSASL
#include "simta_sasl.h"
#endif /* HAVE_LIBSASL */
const char *simta_progname = "simta";
struct connection_info *cinfo_stab = NULL;
int simta_pidfd;
int simsendmail_signal = 0;
int command_signal = 0;
struct sigaction sa;
struct sigaction osahup;
struct sigaction osachld;
struct sigaction osausr1;
struct sigaction osausr2;
const char *version = PACKAGE_VERSION;
struct simta_socket *simta_listen_sockets = NULL;
int daemon_local(void);
int hq_launch(void);
simta_result sender_promote(char *);
simta_result mid_promote(char *);
void env_log_metrics(struct dll_entry *);
void sender_log_metrics(struct dll_entry *);
int daemon_commands(struct simta_dirp *);
void usr1(int);
void usr2(int);
void hup(int);
void chld(int);
int main(int, char *av[]);
int simta_wait_for_child(int);
int simta_sigaction_reset(bool);
int simta_server(bool);
int simta_daemonize_server(void);
int simta_child_receive(struct simta_socket *);
struct simta_socket *simta_listen_port(const char *);
int simta_listen(void);
struct proc_type *simta_proc_add(int, int);
int simta_proc_q_runner(int, struct host_q *);
int simta_read_command(struct simta_dirp *);
int set_sleep_time(int *, int);
void
usr1(int sig) {
simsendmail_signal = 1;
return;
}
void
usr2(int sig) {
command_signal = 1;
return;
}
void
hup(int sig) {
/* hup does nothing at the moment */
return;
}
void
chld(int sig) {
simta_child_signal = 1;
return;
}
int
simta_listen(void) {
int retval = 1;
ucl_object_iter_t iter;
const ucl_object_t *obj;
#ifdef HAVE_LIBSSL
struct simta_socket *ss;
#endif /* HAVE_LIBSSL */
iter = ucl_object_iterate_new(simta_config_obj("receive.ports"));
while ((obj = ucl_object_iterate_safe(iter, false)) != NULL) {
if (simta_listen_port(ucl_object_tostring_forced(obj)) == NULL) {
goto error;
}
}
#ifdef HAVE_LIBSSL
if (simta_config_bool("receive.tls.enabled")) {
ucl_object_iterate_reset(iter, simta_config_obj("receive.tls.ports"));
while ((obj = ucl_object_iterate_safe(iter, false)) != NULL) {
if ((ss = simta_listen_port(ucl_object_tostring_forced(obj))) ==
NULL) {
goto error;
}
ss->ss_flags |= SIMTA_SOCKET_TLS;
}
}
#endif /* HAVE_LIBSSL */
retval = 0;
error:
ucl_object_iterate_free(iter);
return (retval);
}
struct simta_socket *
simta_listen_port(const char *port) {
int sockopt;
int rc;
char host[ NI_MAXHOST ];
char service[ NI_MAXSERV ];
struct addrinfo hints;
struct addrinfo *ai, *air;
struct simta_socket *ss = NULL;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE | AI_NUMERICSERV;
if ((rc = getaddrinfo(NULL, port, &hints, &air)) != 0) {
syslog(LOG_ERR, "Syserror: simta_listen getaddrinfo: %s",
gai_strerror(rc));
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rc));
return (NULL);
}
for (ai = air; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family == AF_INET6) {
if (!simta_config_bool("receive.ipv6")) {
continue;
}
} else {
if (!simta_config_bool("receive.ipv4")) {
continue;
}
}
ss = simta_calloc(1, sizeof(struct simta_socket));
if ((rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, host, sizeof(host),
service, sizeof(service), NI_NUMERICHOST)) != 0) {
syslog(LOG_ERR, "Syserror: simta_listen getnameinfo: %s",
gai_strerror(rc));
fprintf(stderr, "getnameinfo: %s\n", gai_strerror(rc));
return (NULL);
}
ss->ss_service = simta_strdup(service);
ss->ss_next = simta_listen_sockets;
simta_listen_sockets = ss;
if ((ss->ss_socket = socket(
ai->ai_family, ai->ai_socktype, ai->ai_protocol)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen socket %s:%s: %m", host,
service);
perror("socket");
return (NULL);
}
if (ai->ai_family == AF_INET6) {
sockopt = 1;
if (setsockopt(ss->ss_socket, IPPROTO_IPV6, IPV6_V6ONLY, &sockopt,
sizeof(int)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen setsockopt %s:%s: %m",
host, service);
perror("setsockopt");
return (NULL);
}
}
sockopt = 1;
if (setsockopt(ss->ss_socket, SOL_SOCKET, SO_REUSEADDR, &sockopt,
sizeof(int)) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen setsockopt %s:%s: %m", host,
service);
perror("setsockopt");
return (NULL);
}
if (bind(ss->ss_socket, ai->ai_addr, ai->ai_addrlen) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen bind %s:%s: %m", host,
service);
perror("bind");
return (NULL);
}
if (listen(ss->ss_socket, 4096) < 0) {
syslog(LOG_ERR, "Syserror: simta_listen listen %s:%s: %m", host,
service);
perror("listen");
return (NULL);
}
}
freeaddrinfo(air);
return (ss);
}
int
main(int ac, char **av) {
int c, err = 0;
bool dontrun = false;
bool daemonize = true;
char *prog;
struct simta_socket *ss;
const char *simta_uname = NULL;
struct passwd *simta_pw;
const char *config_fname = NULL;
const char *config_extra = NULL;
const char *simta_pwd;
const char *simta_file_pid;
#ifdef HAVE_LIBSSL
SSL_CTX *ssl_ctx = NULL;
#endif /* HAVE_LIBSSL */
if ((prog = strrchr(av[ 0 ], '/')) == NULL) {
prog = av[ 0 ];
} else {
prog++;
}
while ((c = getopt(ac, av, "cCDf:u:U:V")) != -1) {
switch (c) {
case 'c': /* check config files */
dontrun = true;
break;
case 'C': /* clean up directories */
simta_filesystem_cleanup++;
break;
case 'D':
daemonize = false;
break;
case 'f':
config_fname = optarg;
break;
case 'u':
simta_uname = optarg;
break;
case 'U':
config_extra = optarg;
break;
case 'V':
printf("%s\n", version);
exit(SIMTA_EXIT_OK);
default:
err++;
}
}
if (err || optind != ac) {
fprintf(stderr, "Usage:\t%s", prog);
fprintf(stderr, " [ -cCdV ]");
fprintf(stderr, " [ -f config-file ]");
fprintf(stderr, " [ -u user ]");
fprintf(stderr, " [ -U ucl-config-string ]");
fprintf(stderr, "\n");
exit(SIMTA_EXIT_ERROR);
}
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
simta_openlog(false, LOG_PERROR);
if (simta_read_config(config_fname, config_extra) != SIMTA_OK) {
exit(SIMTA_EXIT_ERROR);
}
#ifdef HAVE_LIBSSL
if (simta_config_bool("receive.tls.enabled")) {
/* Test whether our SSL config is usable */
if ((ssl_ctx = tls_server_setup()) == NULL) {
syslog(LOG_ERR, "Liberror: tls_server_setup: %s",
ERR_error_string(ERR_get_error(), NULL));
exit(SIMTA_EXIT_ERROR);
}
SSL_CTX_free(ssl_ctx);
}
#endif /* HAVE_LIBSSL */
#ifdef HAVE_LIBSASL
if (simta_config_bool("receive.auth.authn.enabled") &&
!simta_config_bool("receive.auth.authn.honeypot")) {
if (simta_sasl_init() != SIMTA_OK) {
exit(SIMTA_EXIT_ERROR);
}
}
#endif /* HAVE_LIBSASL */
/* ignore SIGPIPE */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
simta_pwd = simta_config_str("core.base_dir");
if (chdir(simta_pwd) < 0) {
perror(simta_pwd);
exit(SIMTA_EXIT_ERROR);
}
if (dontrun) {
simta_dump_config();
exit(SIMTA_EXIT_OK);
}
/* if we're not a filesystem cleaner, open smtp service */
if (simta_filesystem_cleanup == 0) {
if (simta_listen() != 0) {
exit(SIMTA_EXIT_ERROR);
}
}
if (daemonize) {
simta_file_pid = simta_config_str("core.pid_file");
/* open and truncate the pid file */
if ((simta_pidfd = open(simta_file_pid, O_CREAT | O_WRONLY, 0644)) <
0) {
fprintf(stderr, "open %s: ", simta_file_pid);
perror(NULL);
exit(SIMTA_EXIT_ERROR);
}
/* lock simta pid fd */
if (flock(simta_pidfd, LOCK_EX | LOCK_NB) != 0) {
if (errno == EAGAIN) {
/* file locked by a diferent process */
fprintf(stderr, "flock %s: daemon already running\n",
simta_file_pid);
exit(SIMTA_EXIT_ERROR);
} else {
fprintf(stderr, "flock %s:", simta_file_pid);
perror(NULL);
exit(SIMTA_EXIT_ERROR);
}
}
if (ftruncate(simta_pidfd, (off_t)0) < 0) {
perror("ftruncate");
exit(SIMTA_EXIT_ERROR);
}
}
if (simta_uname == NULL) {
simta_uname = simta_config_str("core.user");
}
if (simta_uname && (strlen(simta_uname) > 0)) {
/* get our user info from /etc/passwd */
if ((simta_pw = getpwnam(simta_uname)) == NULL) {
fprintf(stderr, "getpwnam %s: user not found\n", simta_uname);
exit(SIMTA_EXIT_ERROR);
}
/* set our initgroups */
if (initgroups(simta_pw->pw_name, 0) != 0) {
perror("setuid");
exit(SIMTA_EXIT_ERROR);
}
/* set our gid */
if (setgid(simta_pw->pw_gid) != 0) {
perror("setgid");
exit(SIMTA_EXIT_ERROR);
}
/* set our uid */
if (setuid(simta_pw->pw_uid) != 0) {
perror("setuid");
exit(SIMTA_EXIT_ERROR);
}
#ifdef __linux__
/* we're debugging under linux */
if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) != 0) {
perror("prctl");
exit(SIMTA_EXIT_ERROR);
}
#endif /* __linux__ */
}
if (simta_filesystem_cleanup) {
exit(simta_wait_for_child(PROCESS_CLEANUP));
} else if (simta_wait_for_child(PROCESS_CLEANUP) != 0) {
fprintf(stderr, "simta cleanup error, please check the log\n");
exit(SIMTA_EXIT_ERROR);
}
/*
* Disassociate from controlling tty.
*/
if (daemonize) {
closelog();
switch (fork()) {
case 0:
if (setsid() < 0) {
perror("setsid");
exit(SIMTA_EXIT_ERROR);
}
int i, dt = getdtablesize();
for (i = 0; i < dt; i++) {
/* keep sockets & simta_pidfd open */
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
if (i == ss->ss_socket) {
break;
}
}
if (ss != NULL) {
continue;
}
if (i == simta_pidfd) {
continue;
}
close(i);
}
if ((i = open("/", O_RDONLY, 0)) == 0) {
dup2(i, 1);
dup2(i, 2);
}
break;
case -1:
perror("fork");
exit(SIMTA_EXIT_ERROR);
default:
exit(SIMTA_EXIT_OK);
}
}
/* Start logging in daemon mode */
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
if (daemonize) {
simta_openlog(false, 0);
}
/* catch SIGHUP */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = hup;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGHUP, &sa, &osahup) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGCHLD */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = chld;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, &osachld) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGUSR1 */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = usr1;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGUSR1, &sa, &osausr1) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
/* catch SIGUSR2 */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = usr2;
sa.sa_flags = SA_RESTART;
if (sigaction(SIGUSR2, &sa, &osausr2) < 0) {
syslog(LOG_ERR, "Syserror: sigaction: %m");
exit(SIMTA_EXIT_ERROR);
}
if (daemonize) {
syslog(LOG_NOTICE, "Restart: %s", version);
exit(simta_daemonize_server());
} else {
exit(simta_server(false));
}
}
int
simta_daemonize_server(void) {
int pid;
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
return (1);
}
switch (pid = fork()) {
case 0:
/* Fall through */
simta_openlog(true, 0);
return (simta_server(true));
case -1:
syslog(LOG_ERR, "Syserror: simta_child_queue_scheduler fork: %m");
return (-1);
default:
if (simta_proc_add(PROCESS_SERVER, pid) == NULL) {
return (1);
}
syslog(LOG_NOTICE, "Child: launched daemon %d.%ld", pid,
simta_log_ts.tv_sec);
return (0);
}
}
int
set_sleep_time(int *sleep, int val) {
if (val < 0) {
val = 0;
}
if ((*sleep < 0) || (*sleep > val)) {
*sleep = val;
return (0);
}
return (1);
}
int
hq_launch(void) {
struct host_q *hq;
struct timeval tv_now;
int lag;
time_t waited;
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
return (1);
}
hq = simta_deliver_q;
hq_deliver_pop(hq);
hq->hq_launches++;
lag = tv_now.tv_sec - hq->hq_next_launch.tv_sec;
if (hq->hq_last_launch.tv_sec != 0) {
waited = tv_now.tv_sec - hq->hq_last_launch.tv_sec;
} else {
waited = 0;
}
if ((hq->hq_wait_longest.tv_sec == 0) ||
(hq->hq_wait_longest.tv_sec < waited)) {
hq->hq_wait_longest.tv_sec = waited;
}
if ((hq->hq_wait_shortest.tv_sec == 0) ||
(hq->hq_wait_shortest.tv_sec > waited)) {
hq->hq_wait_shortest.tv_sec = waited;
}
syslog(LOG_INFO,
"Queue %s: launch %d: "
"wait %lu lag %d last %lu shortest %lu longest %lu "
"total messages %d",
hq->hq_hostname, hq->hq_launches, waited, lag,
hq->hq_wait_last.tv_sec, hq->hq_wait_shortest.tv_sec,
hq->hq_wait_longest.tv_sec, hq->hq_entries);
hq->hq_last_launch.tv_sec = tv_now.tv_sec;
if (hq_deliver_push(hq, &tv_now, NULL) != 0) {
return (1);
}
if (simta_child_q_runner(hq) != 0) {
return (1);
}
return (0);
}
int
simta_server(bool daemon) {
struct timeval tv_launch_limiter = {0, 0};
struct timeval tv_disk = {0, 0};
struct timeval tv_unexpanded = {0, 0};
struct timeval tv_sleep = {0, 0};
struct timeval tv_now;
const char *sleep_reason;
char *error_msg = NULL;
int entries;
int ready;
int sleep_time;
int launched;
FILE *pf;
struct simta_dirp command_dirp;
struct simta_dirp slow_dirp;
int fd_max;
fd_set fdset;
struct simta_socket *ss;
struct connection_info **c;
struct connection_info *remove;
memset(&command_dirp, 0, sizeof(struct simta_dirp));
command_dirp.sd_dir = simta_dir_command;
memset(&slow_dirp, 0, sizeof(struct simta_dirp));
slow_dirp.sd_dir = simta_dir_slow;
if (daemon) {
if ((pf = fdopen(simta_pidfd, "w")) == NULL) {
syslog(LOG_ERR, "Syserror: simta_server fdopen: %m");
exit(SIMTA_EXIT_ERROR);
}
fprintf(pf, "%d\n", (int)getpid());
if (fflush(pf) != 0) {
syslog(LOG_ERR, "Syserror: simta_server fflush: %m");
exit(SIMTA_EXIT_ERROR);
}
}
simta_process_type = PROCESS_SERVER;
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
exit(SIMTA_EXIT_ERROR);
}
/* main daemon loop */
simta_debuglog(1, "Daemon: start");
for (;;) {
/* LOCAL RUNNER */
/* CLEAN CHILD PROCESSES */
/* COMMAND DISK */
/* SLOW DISK */
/* QUEUE RUNS */
/* LISTEN */
/* GETTIMEOFDAY */
/* CLEAN THROTTLE TABLE */
/* RECEIVE CHILDREN */
sleep_time = -1;
sleep_reason = "Unset";
if (simsendmail_signal != 0) {
if (simta_q_runner_local <
simta_config_int("deliver.limits.local_runners")) {
simta_debuglog(2, "Daemon: launching local queue runner");
simsendmail_signal = 0;
if (simta_child_q_runner(NULL) != 0) {
goto error;
}
} else {
syslog(LOG_WARNING,
"Daemon: Received signal from simsendmail "
"with no room for more runners, deferring launch");
}
}
if (simta_child_signal != 0) {
if (simta_waitpid(0, NULL, WNOHANG) != 0) {
goto error;
}
}
if ((command_dirp.sd_dirp != NULL) || (command_signal != 0)) {
for (entries = 1;; entries++) {
if (command_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon.command: starting read");
command_signal = 0;
} else {
simta_debuglog(3, "Daemon.command: entry read");
}
daemon_commands(&command_dirp);
if (command_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon.command: finished read");
break;
}
if (entries > 10) {
break;
}
}
}
if (tv_now.tv_sec >= tv_disk.tv_sec) {
for (entries = 1;; entries++) {
if (slow_dirp.sd_dirp == NULL) {
simta_debuglog(2, "Daemon: starting slow queue read");
simta_disk_cycle++;
} else {
simta_debuglog(3, "Daemon: slow queue entry read");
}
if (q_read_dir(&slow_dirp) != 0) {
goto error;
}
if (slow_dirp.sd_dirp == NULL) {
tv_disk.tv_sec = tv_now.tv_sec + 60;
simta_debuglog(2, "Daemon: finished slow queue read");
break;
}
if (entries > 10) {
break;
}
}
}
if (set_sleep_time(&sleep_time, tv_disk.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_DISK;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d", sleep_reason,
sleep_time);
}
/* run unexpanded queue if we have entries, and it is time */
if ((simta_unexpanded_q != NULL) &&
(simta_unexpanded_q->hq_env_head != NULL)) {
if (tv_now.tv_sec >= tv_unexpanded.tv_sec) {
tv_unexpanded.tv_sec = tv_now.tv_sec + 60;
simta_debuglog(2, "Daemon: launching unexpanded queue runner");
if (simta_child_q_runner(simta_unexpanded_q) != 0) {
goto error;
}
}
if (set_sleep_time(&sleep_time,
tv_unexpanded.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_UNEXPANDED;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d", sleep_reason,
sleep_time);
}
}
/* check to see if we need to launch queue runners */
for (launched = 1; simta_deliver_q != NULL; launched++) {
if (tv_launch_limiter.tv_sec > tv_now.tv_sec) {
if (set_sleep_time(&sleep_time,
tv_launch_limiter.tv_sec - tv_now.tv_sec) == 0) {
sleep_reason = S_LIMITER;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d",
sleep_reason, sleep_time);
}
break;
}
if (simta_deliver_q->hq_next_launch.tv_sec > tv_now.tv_sec) {
if (set_sleep_time(&sleep_time,
simta_deliver_q->hq_next_launch.tv_sec -
tv_now.tv_sec) == 0) {
sleep_reason = S_QUEUE;
simta_debuglog(3, "Daemon: set_sleep_time %s: %d",
sleep_reason, sleep_time);
}
simta_debuglog(1, "Daemon: next queue %s %d",
simta_deliver_q->hq_hostname,
(int)(simta_deliver_q->hq_next_launch.tv_sec -
tv_now.tv_sec));
break;
}
if (simta_q_runner_slow >=
simta_config_int("deliver.limits.slow_runners")) {
/* queues need to launch but process limit met */
syslog(LOG_NOTICE,
"Daemon: Queue %s ready with no room for more runners, "
"deferring launch",
simta_deliver_q->hq_hostname);
break;
}
simta_debuglog(2, "Daemon: launching queue runner %s",
simta_deliver_q->hq_hostname);
if (hq_launch() != 0) {
goto error;
}
if (launched % 10 == 0) {
syslog(LOG_WARNING,
"Daemon: launched 10 queue runners, sleeping for 1 "
"second");
tv_launch_limiter.tv_sec = tv_now.tv_sec + 1;
}
}
if (command_dirp.sd_dirp != NULL) {
simta_debuglog(2, "Daemon: reading commands");
sleep_time = 0;
sleep_reason = "reading commands";
}
if ((simsendmail_signal != 0) &&
(simta_q_runner_local <
simta_config_int("deliver.limits.local_runners"))) {
simta_debuglog(2, "Daemon: simsendmail signal");
sleep_time = 0;
sleep_reason = "simsendmail signal";
}
if (simta_child_signal != 0) {
simta_debuglog(2, "Daemon: child signal");
sleep_time = 0;
sleep_reason = "child signal";
}
if (sleep_time < 0) {
sleep_time = 0;
}
if (simta_listen_sockets == NULL) {
if (sleep_time > 0) {
simta_debuglog(
1, "Daemon: sleeping %d: %s", sleep_time, sleep_reason);
sleep((unsigned int)sleep_time);
}
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
goto error;
}
continue;
}
if (sleep_time > 0) {
tv_sleep.tv_sec = sleep_time;
} else {
tv_sleep.tv_sec = 0;
}
tv_sleep.tv_usec = 0;
FD_ZERO(&fdset);
fd_max = 0;
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
FD_SET(ss->ss_socket, &fdset);
fd_max = MAX(fd_max, ss->ss_socket);
}
simta_debuglog(
1, "Daemon: selecting %ld: %s", tv_sleep.tv_sec, sleep_reason);
if ((ready = select(fd_max + 1, &fdset, NULL, NULL, &tv_sleep)) < 0) {
if (errno != EINTR) {
syslog(LOG_ERR, "Syserror: simta_child_smtp_daemon select: %m");
goto error;
}
}
simta_debuglog(2, "Daemon: select over");
if (simta_gettimeofday(&tv_now) == SIMTA_ERR) {
goto error;
}
for (c = &cinfo_stab; *c != NULL;) {
if (((*c)->c_proc_total == 0) &&
timercmp(&((*c)->c_tv), &tv_now, <)) {
remove = *c;
*c = (*c)->c_next;
free(remove);
} else {
c = &((*c)->c_next);
}
}
simta_debuglog(2, "Daemon: %d sockets ready", ready);
if (ready <= 0) {
continue;
}
for (ss = simta_listen_sockets; ss != NULL; ss = ss->ss_next) {
if (FD_ISSET(ss->ss_socket, &fdset)) {
simta_debuglog(2, "Daemon: Connect received");
if (simta_child_receive(ss) != 0) {
goto error;
}
}
}
simta_debuglog(2, "Daemon: done checking sockets");
}
error:
syslog(LOG_NOTICE, "Daemon: Shutdown %s", error_msg ? error_msg : "");
return (1);
}
int
simta_wait_for_child(int child_type) {
int pid;
int status;
const char *p_name;
if (simta_gettimeofday(NULL) == SIMTA_ERR) {
return (1);
}
switch (pid = fork()) {
case -1:
syslog(LOG_ERR, "Syserror: simta_wait_for_child fork: %m");
return (1);
case 0:
simta_openlog(true, 0);
switch (child_type) {
case PROCESS_CLEANUP:
exit(q_cleanup());
case PROCESS_Q_SLOW:
exit(q_runner_dir(simta_dir_slow));
default:
syslog(LOG_ERR,
"Syserror: wait_for_child: child_type out of range: %d",
child_type);
return (1);
}
default:
switch (child_type) {
case PROCESS_CLEANUP:
if (simta_filesystem_cleanup) {
p_name = "filesystem cleaner";
} else {
p_name = "filesystem checker";
}
break;
case PROCESS_Q_SLOW:
p_name = "queue runner";
break;