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- Committer: teddy at recompile
- Date: 2011-12-31 12:08:11 UTC
- mto: (237.7.89 trunk)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111231120811-pkvvjmqm53fx7w9x
* network-hooks.s/wireless (start): Wait until interface is up.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- 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 © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 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;
161
171
}
162
172
163
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
164
175
static bool add_to_char_array(const char *new, char ***array,
165
176
int *len){
166
177
/* Resize the pointed-to array to hold one more pointer */
189
200
}
190
201
191
202
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
192
204
static bool add_argument(plugin *p, const char *arg){
193
205
if(p == NULL){
194
206
return false;
197
209
}
198
210
199
211
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
200
213
static bool add_environment(plugin *p, const char *def, bool replace){
201
214
if(p == NULL){
202
215
return false;
258
271
/* No child processes */
259
272
break;
260
273
}
261
perror("waitpid");
274
error(0, errno, "waitpid");
262
275
}
263
276
264
277
/* A child exited, find it in process_list */
276
289
}
277
290
278
291
/* Prints out a password to stdout */
292
__attribute__((nonnull))
279
293
static bool print_out_password(const char *buffer, size_t length){
280
294
ssize_t ret;
281
295
for(size_t written = 0; written < length; written += (size_t)ret){
289
303
}
290
304
291
305
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
292
307
static void free_plugin(plugin *plugin_node){
293
308
294
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
349
364
sigemptyset(&sigchld_action.sa_mask);
350
365
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
351
366
if(ret == -1){
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
354
369
goto fallback;
355
370
}
356
371
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
357
372
if(ret == -1){
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
360
375
goto fallback;
361
376
}
362
377
394
409
.doc = "Group ID the plugins will run as", .group = 3 },
395
410
{ .name = "debug", .key = 132,
396
411
.doc = "Debug mode", .group = 4 },
412
/*
413
* These reproduce what we would get without ARGP_NO_HELP
414
*/
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.doc = "Print program version", .group = -1 },
397
421
{ .name = NULL }
398
422
};
399
423
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
402
427
switch(key){
403
428
char *tmp;
404
429
intmax_t tmpmax;
405
430
case 'g': /* --global-options */
406
if(arg != NULL){
431
{
407
432
char *plugin_option;
408
433
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
412
434
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
435
break;
415
436
}
416
437
}
417
438
}
418
439
break;
419
440
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
}
441
add_environment(getplugin(NULL), arg, true);
426
442
break;
427
443
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;
444
{
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
448
errno = EINVAL;
449
break;
450
}
451
*option_list = '\0';
452
option_list++;
453
if(arg[0] == '\0'){
454
argp_error(state, "Empty plugin name");
455
errno = EINVAL;
456
break;
457
}
458
char *option;
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
461
break;
438
462
}
439
463
}
440
464
}
441
465
break;
442
466
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
467
{
447
468
char *envdef = strchr(arg, ':');
448
469
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
449
472
break;
450
473
}
451
474
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
475
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
454
480
}
481
add_environment(getplugin(arg), envdef, true);
455
482
}
456
483
break;
457
484
case 'd': /* --disable */
458
if(arg != NULL){
485
{
459
486
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
487
if(p != NULL){
488
p->disabled = true;
462
489
}
463
p->disabled = true;
464
490
}
465
491
break;
466
492
case 'e': /* --enable */
467
if(arg != NULL){
493
{
468
494
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
495
if(p != NULL){
496
p->disabled = false;
471
497
}
472
p->disabled = false;
473
498
}
474
499
break;
475
500
case 128: /* --plugin-dir */
476
501
free(plugindir);
477
502
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
503
break;
482
504
case 129: /* --config-file */
483
505
/* This is already done by parse_opt_config_file() */
484
506
break;
485
507
case 130: /* --userid */
486
errno = 0;
487
508
tmpmax = strtoimax(arg, &tmp, 10);
488
509
if(errno != 0 or tmp == arg or *tmp != '\0'
489
510
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;
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
494
514
}
515
uid = (uid_t)tmpmax;
495
516
break;
496
517
case 131: /* --groupid */
497
errno = 0;
498
518
tmpmax = strtoimax(arg, &tmp, 10);
499
519
if(errno != 0 or tmp == arg or *tmp != '\0'
500
520
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;
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
505
524
}
525
gid = (gid_t)tmpmax;
506
526
break;
507
527
case 132: /* --debug */
508
528
debug = true;
509
529
break;
530
/*
531
* These reproduce what we would get without ARGP_NO_HELP
532
*/
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
542
exit(EXIT_SUCCESS);
543
break;
510
544
/*
511
545
* When adding more options before this line, remember to also add a
512
546
* "case" to the "parse_opt_config_file" function below.
515
549
/* Cryptsetup always passes an argument, which is an empty
516
550
string if "none" was specified in /etc/crypttab. So if
517
551
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
552
if(arg[0] == '\0'){
553
break;
520
554
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
555
default:
525
556
return ARGP_ERR_UNKNOWN;
526
557
}
527
return 0;
558
return errno; /* Set to 0 at start */
528
559
}
529
560
530
561
/* This option parser is the same as parse_opt() above, except it
532
563
error_t parse_opt_config_file(int key, char *arg,
533
564
__attribute__((unused))
534
565
struct argp_state *state){
566
errno = 0;
535
567
switch(key){
536
568
case 'g': /* --global-options */
537
569
case 'G': /* --global-env */
544
576
case 129: /* --config-file */
545
577
free(argfile);
546
578
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
579
break;
551
580
case 130: /* --userid */
552
581
case 131: /* --groupid */
553
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
554
586
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
587
break;
557
588
default:
558
589
return ARGP_ERR_UNKNOWN;
559
590
}
560
return 0;
591
return errno;
561
592
}
562
593
563
594
struct argp argp = { .options = options,
567
598
568
599
/* Parse using parse_opt_config_file() in order to get the custom
569
600
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;
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
603
NULL, NULL);
604
switch(ret){
605
case 0:
606
break;
607
case ENOMEM:
608
default:
609
errno = ret;
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
612
goto fallback;
613
case EINVAL:
614
exitstatus = EX_USAGE;
574
615
goto fallback;
575
616
}
576
617
593
634
custom_argc = 1;
594
635
custom_argv = malloc(sizeof(char*) * 2);
595
636
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
598
639
goto fallback;
599
640
}
600
641
custom_argv[0] = argv[0];
616
657
}
617
658
new_arg = strdup(p);
618
659
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
621
662
free(org_line);
622
663
goto fallback;
623
664
}
626
667
custom_argv = realloc(custom_argv, sizeof(char *)
627
668
* ((unsigned int) custom_argc + 1));
628
669
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
631
672
free(org_line);
632
673
goto fallback;
633
674
}
639
680
ret = fclose(conffp);
640
681
} while(ret == EOF and errno == EINTR);
641
682
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
644
685
goto fallback;
645
686
}
646
687
free(org_line);
648
689
/* Check for harmful errors and go to fallback. Other errors might
649
690
not affect opening plugins */
650
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
653
694
goto fallback;
654
695
}
655
696
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
658
699
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;
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
702
NULL, NULL);
703
switch(ret){
704
case 0:
705
break;
706
case ENOMEM:
707
default:
708
errno = ret;
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
711
goto fallback;
712
case EINVAL:
713
exitstatus = EX_CONFIG;
664
714
goto fallback;
665
715
}
666
716
}
667
717
668
718
/* Parse actual command line arguments, to let them override the
669
719
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;
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
722
NULL, NULL);
723
switch(ret){
724
case 0:
725
break;
726
case ENOMEM:
727
default:
728
errno = ret;
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
731
goto fallback;
732
case EINVAL:
733
exitstatus = EX_USAGE;
674
734
goto fallback;
675
735
}
676
736
688
748
}
689
749
}
690
750
691
/* Strip permissions down to nobody */
751
if(getuid() == 0){
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
757
} else {
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
if(ret == -1){
760
error(0, errno, "fstat");
761
} else {
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
764
if(ret == -1){
765
error(0, errno, "fchown");
766
}
767
}
768
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
770
}
771
}
772
773
/* Lower permissions */
692
774
setgid(gid);
693
775
if(ret == -1){
694
perror("setgid");
776
error(0, errno, "setgid");
695
777
}
696
778
ret = setuid(uid);
697
779
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 */
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
714
784
{
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
}
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
803
if(dir_fd == -1){
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
806
goto fallback;
807
}
808
809
#ifndef O_CLOEXEC
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
812
if(ret < 0){
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
816
goto fallback;
817
}
818
#endif /* O_CLOEXEC */
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
723
826
}
724
827
}
725
828
734
837
/* All directory entries have been processed */
735
838
if(dirst == NULL){
736
839
if(errno == EBADF){
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
739
842
goto fallback;
740
843
}
741
844
break;
771
874
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
772
875
size_t suf_len = strlen(*suf);
773
876
if((d_name_len >= suf_len)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
775
878
== 0)){
776
879
if(debug){
777
880
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
797
900
dirst->d_name));
798
901
}
799
902
if(ret < 0){
800
perror("asprintf");
903
error(0, errno, "asprintf");
801
904
continue;
802
905
}
803
906
804
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
805
908
if(ret == -1){
806
perror("stat");
909
error(0, errno, "stat");
807
910
free(filename);
808
911
continue;
809
912
}
821
924
822
925
plugin *p = getplugin(dirst->d_name);
823
926
if(p == NULL){
824
perror("getplugin");
927
error(0, errno, "getplugin");
825
928
free(filename);
826
929
continue;
827
930
}
839
942
if(g != NULL){
840
943
for(char **a = g->argv + 1; *a != NULL; a++){
841
944
if(not add_argument(p, *a)){
842
perror("add_argument");
945
error(0, errno, "add_argument");
843
946
}
844
947
}
845
948
/* Add global environment variables */
846
949
for(char **e = g->environ; *e != NULL; e++){
847
950
if(not add_environment(p, *e, false)){
848
perror("add_environment");
951
error(0, errno, "add_environment");
849
952
}
850
953
}
851
954
}
856
959
if(p->environ[0] != NULL){
857
960
for(char **e = environ; *e != NULL; e++){
858
961
if(not add_environment(p, *e, false)){
859
perror("add_environment");
962
error(0, errno, "add_environment");
860
963
}
861
964
}
862
965
}
864
967
int pipefd[2];
865
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
866
969
if(ret == -1){
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
869
972
goto fallback;
870
973
}
871
974
/* Ask OS to automatic close the pipe on exec */
872
975
ret = set_cloexec_flag(pipefd[0]);
873
976
if(ret < 0){
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
876
979
goto fallback;
877
980
}
878
981
ret = set_cloexec_flag(pipefd[1]);
879
982
if(ret < 0){
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
882
985
goto fallback;
883
986
}
884
987
/* Block SIGCHLD until process is safely in process list */
886
989
&sigchld_action.sa_mask,
887
990
NULL));
888
991
if(ret < 0){
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
891
994
goto fallback;
892
995
}
893
996
/* Starting a new process to be watched */
896
999
pid = fork();
897
1000
} while(pid == -1 and errno == EINTR);
898
1001
if(pid == -1){
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
901
1004
goto fallback;
902
1005
}
903
1006
if(pid == 0){
904
1007
/* this is the child process */
905
1008
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
906
1009
if(ret < 0){
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
909
1012
}
910
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
911
1014
if(ret < 0){
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
914
1017
}
915
1018
916
1019
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
917
1020
if(ret == -1){
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
920
1023
}
921
1024
922
1025
if(dirfd(dir) < 0){
926
1029
}
927
1030
if(p->environ[0] == NULL){
928
1031
if(execv(filename, p->argv) < 0){
929
perror("execv");
930
_exit(EXIT_FAILURE);
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
931
1034
}
932
1035
} else {
933
1036
if(execve(filename, p->argv, p->environ) < 0){
934
perror("execve");
935
_exit(EXIT_FAILURE);
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
936
1039
}
937
1040
}
938
1041
/* no return */
943
1046
free(filename);
944
1047
plugin *new_plugin = getplugin(dirst->d_name);
945
1048
if(new_plugin == NULL){
946
perror("getplugin");
1049
error(0, errno, "getplugin");
947
1050
ret = (int)(TEMP_FAILURE_RETRY
948
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
1052
NULL)));
950
1053
if(ret < 0){
951
perror("sigprocmask");
1054
error(0, errno, "sigprocmask");
952
1055
}
953
exitstatus = EXIT_FAILURE;
1056
exitstatus = EX_OSERR;
954
1057
goto fallback;
955
1058
}
956
1059
963
1066
&sigchld_action.sa_mask,
964
1067
NULL));
965
1068
if(ret < 0){
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
968
1071
goto fallback;
969
1072
}
970
1073
996
1099
fd_set rfds = rfds_all;
997
1100
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
998
1101
if(select_ret == -1 and errno != EINTR){
999
perror("select");
1000
exitstatus = EXIT_FAILURE;
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
1001
1104
goto fallback;
1002
1105
}
1003
1106
/* OK, now either a process completed, or something can be read
1038
1141
&sigchld_action.sa_mask,
1039
1142
NULL));
1040
1143
if(ret < 0){
1041
perror("sigprocmask");
1042
exitstatus = EXIT_FAILURE;
1144
error(0, errno, "sigprocmask");
1145
exitstatus = EX_OSERR;
1043
1146
goto fallback;
1044
1147
}
1045
1148
1052
1155
(sigprocmask(SIG_UNBLOCK,
1053
1156
&sigchld_action.sa_mask, NULL)));
1054
1157
if(ret < 0){
1055
perror("sigprocmask");
1056
exitstatus = EXIT_FAILURE;
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
1057
1160
goto fallback;
1058
1161
}
1059
1162
1069
1172
bool bret = print_out_password(proc->buffer,
1070
1173
proc->buffer_length);
1071
1174
if(not bret){
1072
perror("print_out_password");
1073
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
1074
1177
}
1075
1178
goto fallback;
1076
1179
}
1088
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
1089
1192
+ (size_t) BUFFER_SIZE);
1090
1193
if(proc->buffer == NULL){
1091
perror("malloc");
1092
exitstatus = EXIT_FAILURE;
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
1093
1196
goto fallback;
1094
1197
}
1095
1198
proc->buffer_size += BUFFER_SIZE;
1116
1219
1117
1220
fallback:
1118
1221
1119
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
1120
1224
/* Fallback if all plugins failed, none are found or an error
1121
1225
occured */
1122
1226
bool bret;
1130
1234
}
1131
1235
bret = print_out_password(passwordbuffer, len);
1132
1236
if(not bret){
1133
perror("print_out_password");
1134
exitstatus = EXIT_FAILURE;
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
1135
1239
}
1136
1240
}
1137
1241
1138
1242
/* Restore old signal handler */
1139
1243
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1140
1244
if(ret == -1){
1141
perror("sigaction");
1142
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
1143
1247
}
1144
1248
1145
1249
if(custom_argv != NULL){
1160
1264
ret = kill(p->pid, SIGTERM);
1161
1265
if(ret == -1 and errno != ESRCH){
1162
1266
/* Set-uid proccesses might not get closed */
1163
perror("kill");
1267
error(0, errno, "kill");
1164
1268
}
1165
1269
}
1166
1270
}
1170
1274
ret = wait(NULL);
1171
1275
} while(ret >= 0);
1172
1276
if(errno != ECHILD){
1173
perror("wait");
1277
error(0, errno, "wait");
1174
1278
}
1175
1279
1176
1280
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0