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- Committer: Teddy Hogeborn
- Date: 2011-10-08 21:15:32 UTC
- mfrom: (505.1.7 teddy)
- Revision ID: teddy@recompile.se-20111008211532-dro26fce2xou7wki
* debian/source/local-options: New; contains "--single-debian-patch".
- files added:
- 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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 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
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
asprintf(), O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
31
#include <stdio.h> /* fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
#include <sys/types.h> /* DIR, fdopendir(), 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, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
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() */
57
strsignal(), strcmp(), strncmp() */
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() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
75
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
80
77
81
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
83
80
84
typedef struct plugin{
81
85
char *name; /* can be NULL or any plugin name */
102
106
/* Gets an existing plugin based on name,
103
107
or if none is found, creates a new one */
104
108
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
109
/* Check for existing plugin with that name */
106
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
111
if((p->name == name)
108
112
or (p->name and name and (strcmp(p->name, name) == 0))){
123
127
copy_name = strdup(name);
124
128
} while(copy_name == NULL and errno == EINTR);
125
129
if(copy_name == NULL){
130
int e = errno;
126
131
free(new_plugin);
132
errno = e;
127
133
return NULL;
128
134
}
129
135
}
137
143
new_plugin->argv = malloc(sizeof(char *) * 2);
138
144
} while(new_plugin->argv == NULL and errno == EINTR);
139
145
if(new_plugin->argv == NULL){
146
int e = errno;
140
147
free(copy_name);
141
148
free(new_plugin);
149
errno = e;
142
150
return NULL;
143
151
}
144
152
new_plugin->argv[0] = copy_name;
148
156
new_plugin->environ = malloc(sizeof(char *));
149
157
} while(new_plugin->environ == NULL and errno == EINTR);
150
158
if(new_plugin->environ == NULL){
159
int e = errno;
151
160
free(copy_name);
152
161
free(new_plugin->argv);
153
162
free(new_plugin);
163
errno = e;
154
164
return NULL;
155
165
}
156
166
new_plugin->environ[0] = NULL;
258
268
/* No child processes */
259
269
break;
260
270
}
261
perror("waitpid");
271
error(0, errno, "waitpid");
262
272
}
263
273
264
274
/* A child exited, find it in process_list */
349
359
sigemptyset(&sigchld_action.sa_mask);
350
360
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
351
361
if(ret == -1){
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
354
364
goto fallback;
355
365
}
356
366
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
357
367
if(ret == -1){
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
360
370
goto fallback;
361
371
}
362
372
394
404
.doc = "Group ID the plugins will run as", .group = 3 },
395
405
{ .name = "debug", .key = 132,
396
406
.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 },
397
416
{ .name = NULL }
398
417
};
399
418
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
420
errno = 0;
402
421
switch(key){
403
422
char *tmp;
404
423
intmax_t tmpmax;
405
424
case 'g': /* --global-options */
406
if(arg != NULL){
425
{
407
426
char *plugin_option;
408
427
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
412
428
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
429
break;
415
430
}
416
431
}
417
432
}
418
433
break;
419
434
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
425
}
435
add_environment(getplugin(NULL), arg, true);
426
436
break;
427
437
case 'o': /* --options-for */
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;
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;
438
456
}
439
457
}
440
458
}
441
459
break;
442
460
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
461
{
447
462
char *envdef = strchr(arg, ':');
448
463
if(envdef == NULL){
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
449
466
break;
450
467
}
451
468
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
469
envdef++;
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
454
474
}
475
add_environment(getplugin(arg), envdef, true);
455
476
}
456
477
break;
457
478
case 'd': /* --disable */
458
if(arg != NULL){
479
{
459
480
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
481
if(p != NULL){
482
p->disabled = true;
462
483
}
463
p->disabled = true;
464
484
}
465
485
break;
466
486
case 'e': /* --enable */
467
if(arg != NULL){
487
{
468
488
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
489
if(p != NULL){
490
p->disabled = false;
471
491
}
472
p->disabled = false;
473
492
}
474
493
break;
475
494
case 128: /* --plugin-dir */
476
495
free(plugindir);
477
496
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
497
break;
482
498
case 129: /* --config-file */
483
499
/* This is already done by parse_opt_config_file() */
484
500
break;
485
501
case 130: /* --userid */
486
errno = 0;
487
502
tmpmax = strtoimax(arg, &tmp, 10);
488
503
if(errno != 0 or tmp == arg or *tmp != '\0'
489
504
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
505
argp_error(state, "Bad user ID number: \"%s\", using %"
506
PRIdMAX, arg, (intmax_t)uid);
507
break;
494
508
}
509
uid = (uid_t)tmpmax;
495
510
break;
496
511
case 131: /* --groupid */
497
errno = 0;
498
512
tmpmax = strtoimax(arg, &tmp, 10);
499
513
if(errno != 0 or tmp == arg or *tmp != '\0'
500
514
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
515
argp_error(state, "Bad group ID number: \"%s\", using %"
516
PRIdMAX, arg, (intmax_t)gid);
517
break;
505
518
}
519
gid = (gid_t)tmpmax;
506
520
break;
507
521
case 132: /* --debug */
508
522
debug = true;
509
523
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;
510
538
/*
511
539
* When adding more options before this line, remember to also add a
512
540
* "case" to the "parse_opt_config_file" function below.
515
543
/* Cryptsetup always passes an argument, which is an empty
516
544
string if "none" was specified in /etc/crypttab. So if
517
545
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
546
if(arg[0] == '\0'){
547
break;
520
548
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
549
default:
525
550
return ARGP_ERR_UNKNOWN;
526
551
}
527
return 0;
552
return errno; /* Set to 0 at start */
528
553
}
529
554
530
555
/* This option parser is the same as parse_opt() above, except it
532
557
error_t parse_opt_config_file(int key, char *arg,
533
558
__attribute__((unused))
534
559
struct argp_state *state){
560
errno = 0;
535
561
switch(key){
536
562
case 'g': /* --global-options */
537
563
case 'G': /* --global-env */
544
570
case 129: /* --config-file */
545
571
free(argfile);
546
572
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
573
break;
551
574
case 130: /* --userid */
552
575
case 131: /* --groupid */
553
576
case 132: /* --debug */
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
554
580
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
581
break;
557
582
default:
558
583
return ARGP_ERR_UNKNOWN;
559
584
}
560
return 0;
585
return errno;
561
586
}
562
587
563
588
struct argp argp = { .options = options,
567
592
568
593
/* Parse using parse_opt_config_file() in order to get the custom
569
594
config file location, if any. */
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;
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;
574
609
goto fallback;
575
610
}
576
611
593
628
custom_argc = 1;
594
629
custom_argv = malloc(sizeof(char*) * 2);
595
630
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
598
633
goto fallback;
599
634
}
600
635
custom_argv[0] = argv[0];
616
651
}
617
652
new_arg = strdup(p);
618
653
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
621
656
free(org_line);
622
657
goto fallback;
623
658
}
626
661
custom_argv = realloc(custom_argv, sizeof(char *)
627
662
* ((unsigned int) custom_argc + 1));
628
663
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
631
666
free(org_line);
632
667
goto fallback;
633
668
}
639
674
ret = fclose(conffp);
640
675
} while(ret == EOF and errno == EINTR);
641
676
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
677
error(0, errno, "fclose");
678
exitstatus = EX_IOERR;
644
679
goto fallback;
645
680
}
646
681
free(org_line);
648
683
/* Check for harmful errors and go to fallback. Other errors might
649
684
not affect opening plugins */
650
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
653
688
goto fallback;
654
689
}
655
690
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
658
693
if(custom_argv != NULL){
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;
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;
664
708
goto fallback;
665
709
}
666
710
}
667
711
668
712
/* Parse actual command line arguments, to let them override the
669
713
config file */
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;
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;
674
728
goto fallback;
675
729
}
676
730
688
742
}
689
743
}
690
744
691
/* Strip permissions down to nobody */
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 */
692
768
setgid(gid);
693
769
if(ret == -1){
694
perror("setgid");
770
error(0, errno, "setgid");
695
771
}
696
772
ret = setuid(uid);
697
773
if(ret == -1){
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 */
774
error(0, errno, "setuid");
775
}
776
777
/* Open plugin directory with close_on_exec flag */
714
778
{
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
}
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;
723
820
}
724
821
}
725
822
734
831
/* All directory entries have been processed */
735
832
if(dirst == NULL){
736
833
if(errno == EBADF){
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
834
error(0, errno, "readdir");
835
exitstatus = EX_IOERR;
739
836
goto fallback;
740
837
}
741
838
break;
771
868
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
772
869
size_t suf_len = strlen(*suf);
773
870
if((d_name_len >= suf_len)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
871
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
775
872
== 0)){
776
873
if(debug){
777
874
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
797
894
dirst->d_name));
798
895
}
799
896
if(ret < 0){
800
perror("asprintf");
897
error(0, errno, "asprintf");
801
898
continue;
802
899
}
803
900
804
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
805
902
if(ret == -1){
806
perror("stat");
903
error(0, errno, "stat");
807
904
free(filename);
808
905
continue;
809
906
}
821
918
822
919
plugin *p = getplugin(dirst->d_name);
823
920
if(p == NULL){
824
perror("getplugin");
921
error(0, errno, "getplugin");
825
922
free(filename);
826
923
continue;
827
924
}
839
936
if(g != NULL){
840
937
for(char **a = g->argv + 1; *a != NULL; a++){
841
938
if(not add_argument(p, *a)){
842
perror("add_argument");
939
error(0, errno, "add_argument");
843
940
}
844
941
}
845
942
/* Add global environment variables */
846
943
for(char **e = g->environ; *e != NULL; e++){
847
944
if(not add_environment(p, *e, false)){
848
perror("add_environment");
945
error(0, errno, "add_environment");
849
946
}
850
947
}
851
948
}
856
953
if(p->environ[0] != NULL){
857
954
for(char **e = environ; *e != NULL; e++){
858
955
if(not add_environment(p, *e, false)){
859
perror("add_environment");
956
error(0, errno, "add_environment");
860
957
}
861
958
}
862
959
}
864
961
int pipefd[2];
865
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
866
963
if(ret == -1){
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
964
error(0, errno, "pipe");
965
exitstatus = EX_OSERR;
869
966
goto fallback;
870
967
}
871
968
/* Ask OS to automatic close the pipe on exec */
872
969
ret = set_cloexec_flag(pipefd[0]);
873
970
if(ret < 0){
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
971
error(0, errno, "set_cloexec_flag");
972
exitstatus = EX_OSERR;
876
973
goto fallback;
877
974
}
878
975
ret = set_cloexec_flag(pipefd[1]);
879
976
if(ret < 0){
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
882
979
goto fallback;
883
980
}
884
981
/* Block SIGCHLD until process is safely in process list */
886
983
&sigchld_action.sa_mask,
887
984
NULL));
888
985
if(ret < 0){
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
986
error(0, errno, "sigprocmask");
987
exitstatus = EX_OSERR;
891
988
goto fallback;
892
989
}
893
990
/* Starting a new process to be watched */
896
993
pid = fork();
897
994
} while(pid == -1 and errno == EINTR);
898
995
if(pid == -1){
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
996
error(0, errno, "fork");
997
exitstatus = EX_OSERR;
901
998
goto fallback;
902
999
}
903
1000
if(pid == 0){
904
1001
/* this is the child process */
905
1002
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
906
1003
if(ret < 0){
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1004
error(0, errno, "sigaction");
1005
_exit(EX_OSERR);
909
1006
}
910
1007
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
911
1008
if(ret < 0){
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1009
error(0, errno, "sigprocmask");
1010
_exit(EX_OSERR);
914
1011
}
915
1012
916
1013
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
917
1014
if(ret == -1){
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1015
error(0, errno, "dup2");
1016
_exit(EX_OSERR);
920
1017
}
921
1018
922
1019
if(dirfd(dir) < 0){
926
1023
}
927
1024
if(p->environ[0] == NULL){
928
1025
if(execv(filename, p->argv) < 0){
929
perror("execv");
930
_exit(EXIT_FAILURE);
1026
error(0, errno, "execv for %s", filename);
1027
_exit(EX_OSERR);
931
1028
}
932
1029
} else {
933
1030
if(execve(filename, p->argv, p->environ) < 0){
934
perror("execve");
935
_exit(EXIT_FAILURE);
1031
error(0, errno, "execve for %s", filename);
1032
_exit(EX_OSERR);
936
1033
}
937
1034
}
938
1035
/* no return */
943
1040
free(filename);
944
1041
plugin *new_plugin = getplugin(dirst->d_name);
945
1042
if(new_plugin == NULL){
946
perror("getplugin");
1043
error(0, errno, "getplugin");
947
1044
ret = (int)(TEMP_FAILURE_RETRY
948
1045
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
1046
NULL)));
950
1047
if(ret < 0){
951
perror("sigprocmask");
1048
error(0, errno, "sigprocmask");
952
1049
}
953
exitstatus = EXIT_FAILURE;
1050
exitstatus = EX_OSERR;
954
1051
goto fallback;
955
1052
}
956
1053
963
1060
&sigchld_action.sa_mask,
964
1061
NULL));
965
1062
if(ret < 0){
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1063
error(0, errno, "sigprocmask");
1064
exitstatus = EX_OSERR;
968
1065
goto fallback;
969
1066
}
970
1067
971
FD_SET(new_plugin->fd, &rfds_all);
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1069
-Wconversion */
972
1070
973
1071
if(maxfd < new_plugin->fd){
974
1072
maxfd = new_plugin->fd;
995
1093
fd_set rfds = rfds_all;
996
1094
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
997
1095
if(select_ret == -1 and errno != EINTR){
998
perror("select");
999
exitstatus = EXIT_FAILURE;
1096
error(0, errno, "select");
1097
exitstatus = EX_OSERR;
1000
1098
goto fallback;
1001
1099
}
1002
1100
/* OK, now either a process completed, or something can be read
1028
1126
}
1029
1127
1030
1128
/* Remove the plugin */
1031
FD_CLR(proc->fd, &rfds_all);
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1130
-Wconversion */
1032
1131
1033
1132
/* Block signal while modifying process_list */
1034
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1036
1135
&sigchld_action.sa_mask,
1037
1136
NULL));
1038
1137
if(ret < 0){
1039
perror("sigprocmask");
1040
exitstatus = EXIT_FAILURE;
1138
error(0, errno, "sigprocmask");
1139
exitstatus = EX_OSERR;
1041
1140
goto fallback;
1042
1141
}
1043
1142
1050
1149
(sigprocmask(SIG_UNBLOCK,
1051
1150
&sigchld_action.sa_mask, NULL)));
1052
1151
if(ret < 0){
1053
perror("sigprocmask");
1054
exitstatus = EXIT_FAILURE;
1152
error(0, errno, "sigprocmask");
1153
exitstatus = EX_OSERR;
1055
1154
goto fallback;
1056
1155
}
1057
1156
1067
1166
bool bret = print_out_password(proc->buffer,
1068
1167
proc->buffer_length);
1069
1168
if(not bret){
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
1169
error(0, errno, "print_out_password");
1170
exitstatus = EX_IOERR;
1072
1171
}
1073
1172
goto fallback;
1074
1173
}
1075
1174
1076
1175
/* This process has not completed. Does it have any output? */
1077
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1176
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1177
warning from
1178
-Wconversion */
1078
1179
/* This process had nothing to say at this time */
1079
1180
proc = proc->next;
1080
1181
continue;
1084
1185
proc->buffer = realloc(proc->buffer, proc->buffer_size
1085
1186
+ (size_t) BUFFER_SIZE);
1086
1187
if(proc->buffer == NULL){
1087
perror("malloc");
1088
exitstatus = EXIT_FAILURE;
1188
error(0, errno, "malloc");
1189
exitstatus = EX_OSERR;
1089
1190
goto fallback;
1090
1191
}
1091
1192
proc->buffer_size += BUFFER_SIZE;
1112
1213
1113
1214
fallback:
1114
1215
1115
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1216
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1217
and exitstatus != EX_OK)){
1116
1218
/* Fallback if all plugins failed, none are found or an error
1117
1219
occured */
1118
1220
bool bret;
1126
1228
}
1127
1229
bret = print_out_password(passwordbuffer, len);
1128
1230
if(not bret){
1129
perror("print_out_password");
1130
exitstatus = EXIT_FAILURE;
1231
error(0, errno, "print_out_password");
1232
exitstatus = EX_IOERR;
1131
1233
}
1132
1234
}
1133
1235
1134
1236
/* Restore old signal handler */
1135
1237
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1136
1238
if(ret == -1){
1137
perror("sigaction");
1138
exitstatus = EXIT_FAILURE;
1239
error(0, errno, "sigaction");
1240
exitstatus = EX_OSERR;
1139
1241
}
1140
1242
1141
1243
if(custom_argv != NULL){
1156
1258
ret = kill(p->pid, SIGTERM);
1157
1259
if(ret == -1 and errno != ESRCH){
1158
1260
/* Set-uid proccesses might not get closed */
1159
perror("kill");
1261
error(0, errno, "kill");
1160
1262
}
1161
1263
}
1162
1264
}
1166
1268
ret = wait(NULL);
1167
1269
} while(ret >= 0);
1168
1270
if(errno != ECHILD){
1169
perror("wait");
1271
error(0, errno, "wait");
1170
1272
}
1171
1273
1172
1274
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0