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- Committer: teddy at bsnet
- Date: 2010-08-16 19:00:59 UTC
- mto: This revision was merged to the branch mainline in revision 420.
- Revision ID: teddy@fukt.bsnet.se-20100816190059-69vvi27up95cgbbl
* Makefile (run-server, run-client): Add notices about harmless error
messages.
messages.
- files removed:
- 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 © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 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
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
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
79
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
76
81
77
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
79
84
80
typedef struct plugin{
85
81
char *name; /* can be NULL or any plugin name */
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;
171
161
}
172
162
173
163
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
164
static bool add_to_char_array(const char *new, char ***array,
176
165
int *len){
177
166
/* Resize the pointed-to array to hold one more pointer */
200
189
}
201
190
202
191
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
204
192
static bool add_argument(plugin *p, const char *arg){
205
193
if(p == NULL){
206
194
return false;
209
197
}
210
198
211
199
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
213
200
static bool add_environment(plugin *p, const char *def, bool replace){
214
201
if(p == NULL){
215
202
return false;
271
258
/* No child processes */
272
259
break;
273
260
}
274
error(0, errno, "waitpid");
261
perror("waitpid");
275
262
}
276
263
277
264
/* A child exited, find it in process_list */
289
276
}
290
277
291
278
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
279
static bool print_out_password(const char *buffer, size_t length){
294
280
ssize_t ret;
295
281
for(size_t written = 0; written < length; written += (size_t)ret){
303
289
}
304
290
305
291
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
292
static void free_plugin(plugin *plugin_node){
308
293
309
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
364
349
sigemptyset(&sigchld_action.sa_mask);
365
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
351
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
369
354
goto fallback;
370
355
}
371
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
357
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
375
360
goto fallback;
376
361
}
377
362
409
394
.doc = "Group ID the plugins will run as", .group = 3 },
410
395
{ .name = "debug", .key = 132,
411
396
.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 },
421
397
{ .name = NULL }
422
398
};
423
399
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
427
402
switch(key){
428
403
char *tmp;
429
404
intmax_t tmpmax;
430
405
case 'g': /* --global-options */
431
{
406
if(arg != NULL){
432
407
char *plugin_option;
433
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
434
412
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
436
415
}
437
416
}
438
417
}
439
418
break;
440
419
case 'G': /* --global-env */
441
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
}
442
426
break;
443
427
case 'o': /* --options-for */
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;
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;
462
438
}
463
439
}
464
440
}
465
441
break;
466
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
467
446
{
468
447
char *envdef = strchr(arg, ':');
469
448
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
449
break;
473
450
}
474
451
*envdef = '\0';
475
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
480
454
}
481
add_environment(getplugin(arg), envdef, true);
482
455
}
483
456
break;
484
457
case 'd': /* --disable */
485
{
458
if(arg != NULL){
486
459
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
489
462
}
463
p->disabled = true;
490
464
}
491
465
break;
492
466
case 'e': /* --enable */
493
{
467
if(arg != NULL){
494
468
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
497
471
}
472
p->disabled = false;
498
473
}
499
474
break;
500
475
case 128: /* --plugin-dir */
501
476
free(plugindir);
502
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
503
481
break;
504
482
case 129: /* --config-file */
505
483
/* This is already done by parse_opt_config_file() */
506
484
break;
507
485
case 130: /* --userid */
486
errno = 0;
508
487
tmpmax = strtoimax(arg, &tmp, 10);
509
488
if(errno != 0 or tmp == arg or *tmp != '\0'
510
489
or tmpmax != (uid_t)tmpmax){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
514
494
}
515
uid = (uid_t)tmpmax;
516
495
break;
517
496
case 131: /* --groupid */
497
errno = 0;
518
498
tmpmax = strtoimax(arg, &tmp, 10);
519
499
if(errno != 0 or tmp == arg or *tmp != '\0'
520
500
or tmpmax != (gid_t)tmpmax){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
524
505
}
525
gid = (gid_t)tmpmax;
526
506
break;
527
507
case 132: /* --debug */
528
508
debug = true;
529
509
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;
544
510
/*
545
511
* When adding more options before this line, remember to also add a
546
512
* "case" to the "parse_opt_config_file" function below.
549
515
/* Cryptsetup always passes an argument, which is an empty
550
516
string if "none" was specified in /etc/crypttab. So if
551
517
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
554
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
555
524
default:
556
525
return ARGP_ERR_UNKNOWN;
557
526
}
558
return errno; /* Set to 0 at start */
527
return 0;
559
528
}
560
529
561
530
/* This option parser is the same as parse_opt() above, except it
563
532
error_t parse_opt_config_file(int key, char *arg,
564
533
__attribute__((unused))
565
534
struct argp_state *state){
566
errno = 0;
567
535
switch(key){
568
536
case 'g': /* --global-options */
569
537
case 'G': /* --global-env */
576
544
case 129: /* --config-file */
577
545
free(argfile);
578
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
579
550
break;
580
551
case 130: /* --userid */
581
552
case 131: /* --groupid */
582
553
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
586
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
587
556
break;
588
557
default:
589
558
return ARGP_ERR_UNKNOWN;
590
559
}
591
return errno;
560
return 0;
592
561
}
593
562
594
563
struct argp argp = { .options = options,
598
567
599
568
/* Parse using parse_opt_config_file() in order to get the custom
600
569
config file location, if any. */
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;
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;
615
574
goto fallback;
616
575
}
617
576
634
593
custom_argc = 1;
635
594
custom_argv = malloc(sizeof(char*) * 2);
636
595
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
639
598
goto fallback;
640
599
}
641
600
custom_argv[0] = argv[0];
657
616
}
658
617
new_arg = strdup(p);
659
618
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
662
621
free(org_line);
663
622
goto fallback;
664
623
}
667
626
custom_argv = realloc(custom_argv, sizeof(char *)
668
627
* ((unsigned int) custom_argc + 1));
669
628
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
672
631
free(org_line);
673
632
goto fallback;
674
633
}
680
639
ret = fclose(conffp);
681
640
} while(ret == EOF and errno == EINTR);
682
641
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
685
644
goto fallback;
686
645
}
687
646
free(org_line);
689
648
/* Check for harmful errors and go to fallback. Other errors might
690
649
not affect opening plugins */
691
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
694
653
goto fallback;
695
654
}
696
655
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
699
658
if(custom_argv != NULL){
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;
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;
714
664
goto fallback;
715
665
}
716
666
}
717
667
718
668
/* Parse actual command line arguments, to let them override the
719
669
config file */
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;
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;
734
674
goto fallback;
735
675
}
736
676
748
688
}
749
689
}
750
690
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 */
691
/* Strip permissions down to nobody */
774
692
setgid(gid);
775
693
if(ret == -1){
776
error(0, errno, "setgid");
694
perror("setgid");
777
695
}
778
696
ret = setuid(uid);
779
697
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* 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 */
784
714
{
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;
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
}
826
723
}
827
724
}
828
725
837
734
/* All directory entries have been processed */
838
735
if(dirst == NULL){
839
736
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
842
739
goto fallback;
843
740
}
844
741
break;
874
771
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
772
size_t suf_len = strlen(*suf);
876
773
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
878
775
== 0)){
879
776
if(debug){
880
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
900
797
dirst->d_name));
901
798
}
902
799
if(ret < 0){
903
error(0, errno, "asprintf");
800
perror("asprintf");
904
801
continue;
905
802
}
906
803
907
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
805
if(ret == -1){
909
error(0, errno, "stat");
806
perror("stat");
910
807
free(filename);
911
808
continue;
912
809
}
924
821
925
822
plugin *p = getplugin(dirst->d_name);
926
823
if(p == NULL){
927
error(0, errno, "getplugin");
824
perror("getplugin");
928
825
free(filename);
929
826
continue;
930
827
}
942
839
if(g != NULL){
943
840
for(char **a = g->argv + 1; *a != NULL; a++){
944
841
if(not add_argument(p, *a)){
945
error(0, errno, "add_argument");
842
perror("add_argument");
946
843
}
947
844
}
948
845
/* Add global environment variables */
949
846
for(char **e = g->environ; *e != NULL; e++){
950
847
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
848
perror("add_environment");
952
849
}
953
850
}
954
851
}
959
856
if(p->environ[0] != NULL){
960
857
for(char **e = environ; *e != NULL; e++){
961
858
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
859
perror("add_environment");
963
860
}
964
861
}
965
862
}
967
864
int pipefd[2];
968
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
866
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
972
869
goto fallback;
973
870
}
974
871
/* Ask OS to automatic close the pipe on exec */
975
872
ret = set_cloexec_flag(pipefd[0]);
976
873
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
979
876
goto fallback;
980
877
}
981
878
ret = set_cloexec_flag(pipefd[1]);
982
879
if(ret < 0){
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
985
882
goto fallback;
986
883
}
987
884
/* Block SIGCHLD until process is safely in process list */
989
886
&sigchld_action.sa_mask,
990
887
NULL));
991
888
if(ret < 0){
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
994
891
goto fallback;
995
892
}
996
893
/* Starting a new process to be watched */
999
896
pid = fork();
1000
897
} while(pid == -1 and errno == EINTR);
1001
898
if(pid == -1){
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
1004
901
goto fallback;
1005
902
}
1006
903
if(pid == 0){
1007
904
/* this is the child process */
1008
905
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1009
906
if(ret < 0){
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1012
909
}
1013
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1014
911
if(ret < 0){
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1017
914
}
1018
915
1019
916
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1020
917
if(ret == -1){
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1023
920
}
1024
921
1025
922
if(dirfd(dir) < 0){
1029
926
}
1030
927
if(p->environ[0] == NULL){
1031
928
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
929
perror("execv");
930
_exit(EXIT_FAILURE);
1034
931
}
1035
932
} else {
1036
933
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
934
perror("execve");
935
_exit(EXIT_FAILURE);
1039
936
}
1040
937
}
1041
938
/* no return */
1046
943
free(filename);
1047
944
plugin *new_plugin = getplugin(dirst->d_name);
1048
945
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
946
perror("getplugin");
1050
947
ret = (int)(TEMP_FAILURE_RETRY
1051
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
949
NULL)));
1053
950
if(ret < 0){
1054
error(0, errno, "sigprocmask");
951
perror("sigprocmask");
1055
952
}
1056
exitstatus = EX_OSERR;
953
exitstatus = EXIT_FAILURE;
1057
954
goto fallback;
1058
955
}
1059
956
1066
963
&sigchld_action.sa_mask,
1067
964
NULL));
1068
965
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1071
968
goto fallback;
1072
969
}
1073
970
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
971
FD_SET(new_plugin->fd, &rfds_all);
1076
972
1077
973
if(maxfd < new_plugin->fd){
1078
974
maxfd = new_plugin->fd;
1099
995
fd_set rfds = rfds_all;
1100
996
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1101
997
if(select_ret == -1 and errno != EINTR){
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
998
perror("select");
999
exitstatus = EXIT_FAILURE;
1104
1000
goto fallback;
1105
1001
}
1106
1002
/* OK, now either a process completed, or something can be read
1132
1028
}
1133
1029
1134
1030
/* Remove the plugin */
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1031
FD_CLR(proc->fd, &rfds_all);
1137
1032
1138
1033
/* Block signal while modifying process_list */
1139
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1141
1036
&sigchld_action.sa_mask,
1142
1037
NULL));
1143
1038
if(ret < 0){
1144
error(0, errno, "sigprocmask");
1145
exitstatus = EX_OSERR;
1039
perror("sigprocmask");
1040
exitstatus = EXIT_FAILURE;
1146
1041
goto fallback;
1147
1042
}
1148
1043
1155
1050
(sigprocmask(SIG_UNBLOCK,
1156
1051
&sigchld_action.sa_mask, NULL)));
1157
1052
if(ret < 0){
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
1053
perror("sigprocmask");
1054
exitstatus = EXIT_FAILURE;
1160
1055
goto fallback;
1161
1056
}
1162
1057
1172
1067
bool bret = print_out_password(proc->buffer,
1173
1068
proc->buffer_length);
1174
1069
if(not bret){
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
1177
1072
}
1178
1073
goto fallback;
1179
1074
}
1180
1075
1181
1076
/* This process has not completed. Does it have any output? */
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1183
warning from
1184
-Wconversion */
1077
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1185
1078
/* This process had nothing to say at this time */
1186
1079
proc = proc->next;
1187
1080
continue;
1191
1084
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
1085
+ (size_t) BUFFER_SIZE);
1193
1086
if(proc->buffer == NULL){
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
1087
perror("malloc");
1088
exitstatus = EXIT_FAILURE;
1196
1089
goto fallback;
1197
1090
}
1198
1091
proc->buffer_size += BUFFER_SIZE;
1219
1112
1220
1113
fallback:
1221
1114
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
1115
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1224
1116
/* Fallback if all plugins failed, none are found or an error
1225
1117
occured */
1226
1118
bool bret;
1234
1126
}
1235
1127
bret = print_out_password(passwordbuffer, len);
1236
1128
if(not bret){
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
1129
perror("print_out_password");
1130
exitstatus = EXIT_FAILURE;
1239
1131
}
1240
1132
}
1241
1133
1242
1134
/* Restore old signal handler */
1243
1135
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1244
1136
if(ret == -1){
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
1137
perror("sigaction");
1138
exitstatus = EXIT_FAILURE;
1247
1139
}
1248
1140
1249
1141
if(custom_argv != NULL){
1264
1156
ret = kill(p->pid, SIGTERM);
1265
1157
if(ret == -1 and errno != ESRCH){
1266
1158
/* Set-uid proccesses might not get closed */
1267
error(0, errno, "kill");
1159
perror("kill");
1268
1160
}
1269
1161
}
1270
1162
}
1274
1166
ret = wait(NULL);
1275
1167
} while(ret >= 0);
1276
1168
if(errno != ECHILD){
1277
error(0, errno, "wait");
1169
perror("wait");
1278
1170
}
1279
1171
1280
1172
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0