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- Committer: Teddy Hogeborn
- Date: 2009-09-22 20:18:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20090922201843-cd5uqnthf3eegg4l
* mandos (Client.start_checker): Bug fix: Fix race condition with
short intervals.
short intervals.
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
42
42
WCOREDUMP() */
43
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
44
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
46
readdir(), closedir(), dirfd() */
47
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
48
fcntl(), setuid(), setgid(),
54
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
55
FD_CLOEXEC */
56
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
57
strsignal() */
58
58
#include <errno.h> /* errno */
59
59
#include <argp.h> /* struct argp_option, struct
60
60
argp_state, struct argp,
68
68
*/
69
69
#include <errno.h> /* errno, EBADF */
70
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
71
76
72
#define BUFFER_SIZE 256
77
73
106
102
/* Gets an existing plugin based on name,
107
103
or if none is found, creates a new one */
108
104
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
110
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
107
if((p->name == name)
112
108
or (p->name and name and (strcmp(p->name, name) == 0))){
127
123
copy_name = strdup(name);
128
124
} while(copy_name == NULL and errno == EINTR);
129
125
if(copy_name == NULL){
130
int e = errno;
131
126
free(new_plugin);
132
errno = e;
133
127
return NULL;
134
128
}
135
129
}
143
137
new_plugin->argv = malloc(sizeof(char *) * 2);
144
138
} while(new_plugin->argv == NULL and errno == EINTR);
145
139
if(new_plugin->argv == NULL){
146
int e = errno;
147
140
free(copy_name);
148
141
free(new_plugin);
149
errno = e;
150
142
return NULL;
151
143
}
152
144
new_plugin->argv[0] = copy_name;
156
148
new_plugin->environ = malloc(sizeof(char *));
157
149
} while(new_plugin->environ == NULL and errno == EINTR);
158
150
if(new_plugin->environ == NULL){
159
int e = errno;
160
151
free(copy_name);
161
152
free(new_plugin->argv);
162
153
free(new_plugin);
163
errno = e;
164
154
return NULL;
165
155
}
166
156
new_plugin->environ[0] = NULL;
268
258
/* No child processes */
269
259
break;
270
260
}
271
error(0, errno, "waitpid");
261
perror("waitpid");
272
262
}
273
263
274
264
/* A child exited, find it in process_list */
359
349
sigemptyset(&sigchld_action.sa_mask);
360
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
361
351
if(ret == -1){
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
364
354
goto fallback;
365
355
}
366
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
367
357
if(ret == -1){
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
370
360
goto fallback;
371
361
}
372
362
404
394
.doc = "Group ID the plugins will run as", .group = 3 },
405
395
{ .name = "debug", .key = 132,
406
396
.doc = "Debug mode", .group = 4 },
407
/*
408
* These reproduce what we would get without ARGP_NO_HELP
409
*/
410
{ .name = "help", .key = '?',
411
.doc = "Give this help list", .group = -1 },
412
{ .name = "usage", .key = -3,
413
.doc = "Give a short usage message", .group = -1 },
414
{ .name = "version", .key = 'V',
415
.doc = "Print program version", .group = -1 },
416
397
{ .name = NULL }
417
398
};
418
399
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
420
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
421
402
switch(key){
422
403
char *tmp;
423
404
intmax_t tmpmax;
424
405
case 'g': /* --global-options */
425
{
406
if(arg != NULL){
426
407
char *plugin_option;
427
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
428
412
if(not add_argument(getplugin(NULL), plugin_option)){
429
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
430
415
}
431
416
}
432
417
}
433
418
break;
434
419
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
425
}
436
426
break;
437
427
case 'o': /* --options-for */
438
{
439
char *option_list = strchr(arg, ':');
440
if(option_list == NULL){
441
argp_error(state, "No colon in \"%s\"", arg);
442
errno = EINVAL;
443
break;
444
}
445
*option_list = '\0';
446
option_list++;
447
if(arg[0] == '\0'){
448
argp_error(state, "Empty plugin name");
449
errno = EINVAL;
450
break;
451
}
452
char *option;
453
while((option = strsep(&option_list, ",")) != NULL){
454
if(not add_argument(getplugin(arg), option)){
455
break;
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
456
438
}
457
439
}
458
440
}
459
441
break;
460
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
461
446
{
462
447
char *envdef = strchr(arg, ':');
463
448
if(envdef == NULL){
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
466
449
break;
467
450
}
468
451
*envdef = '\0';
469
envdef++;
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
474
454
}
475
add_environment(getplugin(arg), envdef, true);
476
455
}
477
456
break;
478
457
case 'd': /* --disable */
479
{
458
if(arg != NULL){
480
459
plugin *p = getplugin(arg);
481
if(p != NULL){
482
p->disabled = true;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
483
462
}
463
p->disabled = true;
484
464
}
485
465
break;
486
466
case 'e': /* --enable */
487
{
467
if(arg != NULL){
488
468
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = false;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
491
471
}
472
p->disabled = false;
492
473
}
493
474
break;
494
475
case 128: /* --plugin-dir */
495
476
free(plugindir);
496
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
497
481
break;
498
482
case 129: /* --config-file */
499
483
/* This is already done by parse_opt_config_file() */
500
484
break;
501
485
case 130: /* --userid */
486
errno = 0;
502
487
tmpmax = strtoimax(arg, &tmp, 10);
503
488
if(errno != 0 or tmp == arg or *tmp != '\0'
504
489
or tmpmax != (uid_t)tmpmax){
505
argp_error(state, "Bad user ID number: \"%s\", using %"
506
PRIdMAX, arg, (intmax_t)uid);
507
break;
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
508
494
}
509
uid = (uid_t)tmpmax;
510
495
break;
511
496
case 131: /* --groupid */
497
errno = 0;
512
498
tmpmax = strtoimax(arg, &tmp, 10);
513
499
if(errno != 0 or tmp == arg or *tmp != '\0'
514
500
or tmpmax != (gid_t)tmpmax){
515
argp_error(state, "Bad group ID number: \"%s\", using %"
516
PRIdMAX, arg, (intmax_t)gid);
517
break;
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
518
505
}
519
gid = (gid_t)tmpmax;
520
506
break;
521
507
case 132: /* --debug */
522
508
debug = true;
523
509
break;
524
/*
525
* These reproduce what we would get without ARGP_NO_HELP
526
*/
527
case '?': /* --help */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
530
case -3: /* --usage */
531
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
532
argp_state_help(state, state->out_stream,
533
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
534
case 'V': /* --version */
535
fprintf(state->out_stream, "%s\n", argp_program_version);
536
exit(EXIT_SUCCESS);
537
break;
538
510
/*
539
511
* When adding more options before this line, remember to also add a
540
512
* "case" to the "parse_opt_config_file" function below.
543
515
/* Cryptsetup always passes an argument, which is an empty
544
516
string if "none" was specified in /etc/crypttab. So if
545
517
argument was empty, we ignore it silently. */
546
if(arg[0] == '\0'){
547
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
548
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
549
524
default:
550
525
return ARGP_ERR_UNKNOWN;
551
526
}
552
return errno; /* Set to 0 at start */
527
return 0;
553
528
}
554
529
555
530
/* This option parser is the same as parse_opt() above, except it
557
532
error_t parse_opt_config_file(int key, char *arg,
558
533
__attribute__((unused))
559
534
struct argp_state *state){
560
errno = 0;
561
535
switch(key){
562
536
case 'g': /* --global-options */
563
537
case 'G': /* --global-env */
570
544
case 129: /* --config-file */
571
545
free(argfile);
572
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
573
550
break;
574
551
case 130: /* --userid */
575
552
case 131: /* --groupid */
576
553
case 132: /* --debug */
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
580
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
581
556
break;
582
557
default:
583
558
return ARGP_ERR_UNKNOWN;
584
559
}
585
return errno;
560
return 0;
586
561
}
587
562
588
563
struct argp argp = { .options = options,
592
567
593
568
/* Parse using parse_opt_config_file() in order to get the custom
594
569
config file location, if any. */
595
ret = argp_parse(&argp, argc, argv,
596
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
597
NULL, NULL);
598
switch(ret){
599
case 0:
600
break;
601
case ENOMEM:
602
default:
603
errno = ret;
604
error(0, errno, "argp_parse");
605
exitstatus = EX_OSERR;
606
goto fallback;
607
case EINVAL:
608
exitstatus = EX_USAGE;
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
572
fprintf(stderr, "Unknown error while parsing arguments\n");
573
exitstatus = EXIT_FAILURE;
609
574
goto fallback;
610
575
}
611
576
628
593
custom_argc = 1;
629
594
custom_argv = malloc(sizeof(char*) * 2);
630
595
if(custom_argv == NULL){
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
633
598
goto fallback;
634
599
}
635
600
custom_argv[0] = argv[0];
651
616
}
652
617
new_arg = strdup(p);
653
618
if(new_arg == NULL){
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
656
621
free(org_line);
657
622
goto fallback;
658
623
}
661
626
custom_argv = realloc(custom_argv, sizeof(char *)
662
627
* ((unsigned int) custom_argc + 1));
663
628
if(custom_argv == NULL){
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
666
631
free(org_line);
667
632
goto fallback;
668
633
}
674
639
ret = fclose(conffp);
675
640
} while(ret == EOF and errno == EINTR);
676
641
if(ret == EOF){
677
error(0, errno, "fclose");
678
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
679
644
goto fallback;
680
645
}
681
646
free(org_line);
683
648
/* Check for harmful errors and go to fallback. Other errors might
684
649
not affect opening plugins */
685
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
688
653
goto fallback;
689
654
}
690
655
}
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
693
658
if(custom_argv != NULL){
694
ret = argp_parse(&argp, custom_argc, custom_argv,
695
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
696
NULL, NULL);
697
switch(ret){
698
case 0:
699
break;
700
case ENOMEM:
701
default:
702
errno = ret;
703
error(0, errno, "argp_parse");
704
exitstatus = EX_OSERR;
705
goto fallback;
706
case EINVAL:
707
exitstatus = EX_CONFIG;
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
662
fprintf(stderr, "Unknown error while parsing arguments\n");
663
exitstatus = EXIT_FAILURE;
708
664
goto fallback;
709
665
}
710
666
}
711
667
712
668
/* Parse actual command line arguments, to let them override the
713
669
config file */
714
ret = argp_parse(&argp, argc, argv,
715
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
716
NULL, NULL);
717
switch(ret){
718
case 0:
719
break;
720
case ENOMEM:
721
default:
722
errno = ret;
723
error(0, errno, "argp_parse");
724
exitstatus = EX_OSERR;
725
goto fallback;
726
case EINVAL:
727
exitstatus = EX_USAGE;
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
728
674
goto fallback;
729
675
}
730
676
742
688
}
743
689
}
744
690
745
{
746
/* Work around Debian bug #633582:
747
<http://bugs.debian.org/633582> */
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
749
if(plugindir_fd == -1){
750
error(0, errno, "open");
751
} else {
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
753
if(ret == -1){
754
error(0, errno, "fstat");
755
} else {
756
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
757
ret = fchown(plugindir_fd, uid, gid);
758
if(ret == -1){
759
error(0, errno, "fchown");
760
}
761
}
762
}
763
TEMP_FAILURE_RETRY(close(plugindir_fd));
764
}
765
}
766
767
/* Lower permissions */
691
/* Strip permissions down to nobody */
768
692
setgid(gid);
769
693
if(ret == -1){
770
error(0, errno, "setgid");
694
perror("setgid");
771
695
}
772
696
ret = setuid(uid);
773
697
if(ret == -1){
774
error(0, errno, "setuid");
775
}
776
777
/* Open plugin directory with close_on_exec flag */
698
perror("setuid");
699
}
700
701
if(plugindir == NULL){
702
dir = opendir(PDIR);
703
} else {
704
dir = opendir(plugindir);
705
}
706
707
if(dir == NULL){
708
perror("Could not open plugin dir");
709
exitstatus = EXIT_FAILURE;
710
goto fallback;
711
}
712
713
/* Set the FD_CLOEXEC flag on the directory, if possible */
778
714
{
779
int dir_fd = -1;
780
if(plugindir == NULL){
781
dir_fd = open(PDIR, O_RDONLY |
782
#ifdef O_CLOEXEC
783
O_CLOEXEC
784
#else /* not O_CLOEXEC */
785
0
786
#endif /* not O_CLOEXEC */
787
);
788
} else {
789
dir_fd = open(plugindir, O_RDONLY |
790
#ifdef O_CLOEXEC
791
O_CLOEXEC
792
#else /* not O_CLOEXEC */
793
0
794
#endif /* not O_CLOEXEC */
795
);
796
}
797
if(dir_fd == -1){
798
error(0, errno, "Could not open plugin dir");
799
exitstatus = EX_UNAVAILABLE;
800
goto fallback;
801
}
802
803
#ifndef O_CLOEXEC
804
/* Set the FD_CLOEXEC flag on the directory */
805
ret = set_cloexec_flag(dir_fd);
806
if(ret < 0){
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
809
exitstatus = EX_OSERR;
810
goto fallback;
811
}
812
#endif /* O_CLOEXEC */
813
814
dir = fdopendir(dir_fd);
815
if(dir == NULL){
816
error(0, errno, "Could not open plugin dir");
817
TEMP_FAILURE_RETRY(close(dir_fd));
818
exitstatus = EX_OSERR;
819
goto fallback;
715
int dir_fd = dirfd(dir);
716
if(dir_fd >= 0){
717
ret = set_cloexec_flag(dir_fd);
718
if(ret < 0){
719
perror("set_cloexec_flag");
720
exitstatus = EXIT_FAILURE;
721
goto fallback;
722
}
820
723
}
821
724
}
822
725
831
734
/* All directory entries have been processed */
832
735
if(dirst == NULL){
833
736
if(errno == EBADF){
834
error(0, errno, "readdir");
835
exitstatus = EX_IOERR;
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
836
739
goto fallback;
837
740
}
838
741
break;
868
771
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
869
772
size_t suf_len = strlen(*suf);
870
773
if((d_name_len >= suf_len)
871
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
872
775
== 0)){
873
776
if(debug){
874
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
797
dirst->d_name));
895
798
}
896
799
if(ret < 0){
897
error(0, errno, "asprintf");
800
perror("asprintf");
898
801
continue;
899
802
}
900
803
901
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
902
805
if(ret == -1){
903
error(0, errno, "stat");
806
perror("stat");
904
807
free(filename);
905
808
continue;
906
809
}
918
821
919
822
plugin *p = getplugin(dirst->d_name);
920
823
if(p == NULL){
921
error(0, errno, "getplugin");
824
perror("getplugin");
922
825
free(filename);
923
826
continue;
924
827
}
936
839
if(g != NULL){
937
840
for(char **a = g->argv + 1; *a != NULL; a++){
938
841
if(not add_argument(p, *a)){
939
error(0, errno, "add_argument");
842
perror("add_argument");
940
843
}
941
844
}
942
845
/* Add global environment variables */
943
846
for(char **e = g->environ; *e != NULL; e++){
944
847
if(not add_environment(p, *e, false)){
945
error(0, errno, "add_environment");
848
perror("add_environment");
946
849
}
947
850
}
948
851
}
953
856
if(p->environ[0] != NULL){
954
857
for(char **e = environ; *e != NULL; e++){
955
858
if(not add_environment(p, *e, false)){
956
error(0, errno, "add_environment");
859
perror("add_environment");
957
860
}
958
861
}
959
862
}
961
864
int pipefd[2];
962
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
963
866
if(ret == -1){
964
error(0, errno, "pipe");
965
exitstatus = EX_OSERR;
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
966
869
goto fallback;
967
870
}
968
871
/* Ask OS to automatic close the pipe on exec */
969
872
ret = set_cloexec_flag(pipefd[0]);
970
873
if(ret < 0){
971
error(0, errno, "set_cloexec_flag");
972
exitstatus = EX_OSERR;
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
973
876
goto fallback;
974
877
}
975
878
ret = set_cloexec_flag(pipefd[1]);
976
879
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
979
882
goto fallback;
980
883
}
981
884
/* Block SIGCHLD until process is safely in process list */
983
886
&sigchld_action.sa_mask,
984
887
NULL));
985
888
if(ret < 0){
986
error(0, errno, "sigprocmask");
987
exitstatus = EX_OSERR;
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
988
891
goto fallback;
989
892
}
990
893
/* Starting a new process to be watched */
993
896
pid = fork();
994
897
} while(pid == -1 and errno == EINTR);
995
898
if(pid == -1){
996
error(0, errno, "fork");
997
exitstatus = EX_OSERR;
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
998
901
goto fallback;
999
902
}
1000
903
if(pid == 0){
1001
904
/* this is the child process */
1002
905
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1003
906
if(ret < 0){
1004
error(0, errno, "sigaction");
1005
_exit(EX_OSERR);
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1006
909
}
1007
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1008
911
if(ret < 0){
1009
error(0, errno, "sigprocmask");
1010
_exit(EX_OSERR);
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1011
914
}
1012
915
1013
916
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1014
917
if(ret == -1){
1015
error(0, errno, "dup2");
1016
_exit(EX_OSERR);
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1017
920
}
1018
921
1019
922
if(dirfd(dir) < 0){
1023
926
}
1024
927
if(p->environ[0] == NULL){
1025
928
if(execv(filename, p->argv) < 0){
1026
error(0, errno, "execv for %s", filename);
1027
_exit(EX_OSERR);
929
perror("execv");
930
_exit(EXIT_FAILURE);
1028
931
}
1029
932
} else {
1030
933
if(execve(filename, p->argv, p->environ) < 0){
1031
error(0, errno, "execve for %s", filename);
1032
_exit(EX_OSERR);
934
perror("execve");
935
_exit(EXIT_FAILURE);
1033
936
}
1034
937
}
1035
938
/* no return */
1040
943
free(filename);
1041
944
plugin *new_plugin = getplugin(dirst->d_name);
1042
945
if(new_plugin == NULL){
1043
error(0, errno, "getplugin");
946
perror("getplugin");
1044
947
ret = (int)(TEMP_FAILURE_RETRY
1045
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1046
949
NULL)));
1047
950
if(ret < 0){
1048
error(0, errno, "sigprocmask");
951
perror("sigprocmask");
1049
952
}
1050
exitstatus = EX_OSERR;
953
exitstatus = EXIT_FAILURE;
1051
954
goto fallback;
1052
955
}
1053
956
1060
963
&sigchld_action.sa_mask,
1061
964
NULL));
1062
965
if(ret < 0){
1063
error(0, errno, "sigprocmask");
1064
exitstatus = EX_OSERR;
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1065
968
goto fallback;
1066
969
}
1067
970
1093
996
fd_set rfds = rfds_all;
1094
997
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1095
998
if(select_ret == -1 and errno != EINTR){
1096
error(0, errno, "select");
1097
exitstatus = EX_OSERR;
999
perror("select");
1000
exitstatus = EXIT_FAILURE;
1098
1001
goto fallback;
1099
1002
}
1100
1003
/* OK, now either a process completed, or something can be read
1135
1038
&sigchld_action.sa_mask,
1136
1039
NULL));
1137
1040
if(ret < 0){
1138
error(0, errno, "sigprocmask");
1139
exitstatus = EX_OSERR;
1041
perror("sigprocmask");
1042
exitstatus = EXIT_FAILURE;
1140
1043
goto fallback;
1141
1044
}
1142
1045
1149
1052
(sigprocmask(SIG_UNBLOCK,
1150
1053
&sigchld_action.sa_mask, NULL)));
1151
1054
if(ret < 0){
1152
error(0, errno, "sigprocmask");
1153
exitstatus = EX_OSERR;
1055
perror("sigprocmask");
1056
exitstatus = EXIT_FAILURE;
1154
1057
goto fallback;
1155
1058
}
1156
1059
1166
1069
bool bret = print_out_password(proc->buffer,
1167
1070
proc->buffer_length);
1168
1071
if(not bret){
1169
error(0, errno, "print_out_password");
1170
exitstatus = EX_IOERR;
1072
perror("print_out_password");
1073
exitstatus = EXIT_FAILURE;
1171
1074
}
1172
1075
goto fallback;
1173
1076
}
1185
1088
proc->buffer = realloc(proc->buffer, proc->buffer_size
1186
1089
+ (size_t) BUFFER_SIZE);
1187
1090
if(proc->buffer == NULL){
1188
error(0, errno, "malloc");
1189
exitstatus = EX_OSERR;
1091
perror("malloc");
1092
exitstatus = EXIT_FAILURE;
1190
1093
goto fallback;
1191
1094
}
1192
1095
proc->buffer_size += BUFFER_SIZE;
1213
1116
1214
1117
fallback:
1215
1118
1216
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1217
and exitstatus != EX_OK)){
1119
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1218
1120
/* Fallback if all plugins failed, none are found or an error
1219
1121
occured */
1220
1122
bool bret;
1228
1130
}
1229
1131
bret = print_out_password(passwordbuffer, len);
1230
1132
if(not bret){
1231
error(0, errno, "print_out_password");
1232
exitstatus = EX_IOERR;
1133
perror("print_out_password");
1134
exitstatus = EXIT_FAILURE;
1233
1135
}
1234
1136
}
1235
1137
1236
1138
/* Restore old signal handler */
1237
1139
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1238
1140
if(ret == -1){
1239
error(0, errno, "sigaction");
1240
exitstatus = EX_OSERR;
1141
perror("sigaction");
1142
exitstatus = EXIT_FAILURE;
1241
1143
}
1242
1144
1243
1145
if(custom_argv != NULL){
1258
1160
ret = kill(p->pid, SIGTERM);
1259
1161
if(ret == -1 and errno != ESRCH){
1260
1162
/* Set-uid proccesses might not get closed */
1261
error(0, errno, "kill");
1163
perror("kill");
1262
1164
}
1263
1165
}
1264
1166
}
1268
1170
ret = wait(NULL);
1269
1171
} while(ret >= 0);
1270
1172
if(errno != ECHILD){
1271
error(0, errno, "wait");
1173
perror("wait");
1272
1174
}
1273
1175
1274
1176
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0