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- Committer: Teddy Hogeborn
- Date: 2009-09-07 23:48:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20090907234817-op1lgg9gpruejsiv
* initramfs-tools-hook: Bug fix: Really install user-supplied plugins.
Bug fix: Warn about empty plugin directory.
Bug fix: Warn about empty plugin directory.
- 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;
243
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
244
231
*/
245
232
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
247
234
/* If reading the flags failed, return error indication now. */
248
235
if(ret < 0){
249
236
return ret;
250
237
}
251
238
/* Store modified flag word in the descriptor. */
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
254
240
}
255
241
256
242
271
257
/* No child processes */
272
258
break;
273
259
}
274
error(0, errno, "waitpid");
260
perror("waitpid");
275
261
}
276
262
277
263
/* A child exited, find it in process_list */
289
275
}
290
276
291
277
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
278
static bool print_out_password(const char *buffer, size_t length){
294
279
ssize_t ret;
295
280
for(size_t written = 0; written < length; written += (size_t)ret){
303
288
}
304
289
305
290
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
291
static void free_plugin(plugin *plugin_node){
308
292
309
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
364
348
sigemptyset(&sigchld_action.sa_mask);
365
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
350
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
369
353
goto fallback;
370
354
}
371
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
356
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
375
359
goto fallback;
376
360
}
377
361
409
393
.doc = "Group ID the plugins will run as", .group = 3 },
410
394
{ .name = "debug", .key = 132,
411
395
.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
396
{ .name = NULL }
422
397
};
423
398
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
427
401
switch(key){
428
402
char *tmp;
429
403
intmax_t tmpmax;
430
404
case 'g': /* --global-options */
431
{
405
if(arg != NULL){
432
406
char *plugin_option;
433
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
434
411
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
436
414
}
437
415
}
438
416
}
439
417
break;
440
418
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
424
}
442
425
break;
443
426
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;
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
462
437
}
463
438
}
464
439
}
465
440
break;
466
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
467
445
{
468
446
char *envdef = strchr(arg, ':');
469
447
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
448
break;
473
449
}
474
450
*envdef = '\0';
475
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
480
453
}
481
add_environment(getplugin(arg), envdef, true);
482
454
}
483
455
break;
484
456
case 'd': /* --disable */
485
{
457
if(arg != NULL){
486
458
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
489
461
}
462
p->disabled = true;
490
463
}
491
464
break;
492
465
case 'e': /* --enable */
493
{
466
if(arg != NULL){
494
467
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
497
470
}
471
p->disabled = false;
498
472
}
499
473
break;
500
474
case 128: /* --plugin-dir */
501
475
free(plugindir);
502
476
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
479
}
503
480
break;
504
481
case 129: /* --config-file */
505
482
/* This is already done by parse_opt_config_file() */
506
483
break;
507
484
case 130: /* --userid */
485
errno = 0;
508
486
tmpmax = strtoimax(arg, &tmp, 10);
509
487
if(errno != 0 or tmp == arg or *tmp != '\0'
510
488
or tmpmax != (uid_t)tmpmax){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
514
493
}
515
uid = (uid_t)tmpmax;
516
494
break;
517
495
case 131: /* --groupid */
496
errno = 0;
518
497
tmpmax = strtoimax(arg, &tmp, 10);
519
498
if(errno != 0 or tmp == arg or *tmp != '\0'
520
499
or tmpmax != (gid_t)tmpmax){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
524
504
}
525
gid = (gid_t)tmpmax;
526
505
break;
527
506
case 132: /* --debug */
528
507
debug = true;
529
508
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
509
/*
545
510
* When adding more options before this line, remember to also add a
546
511
* "case" to the "parse_opt_config_file" function below.
549
514
/* Cryptsetup always passes an argument, which is an empty
550
515
string if "none" was specified in /etc/crypttab. So if
551
516
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
554
519
}
520
break;
521
case ARGP_KEY_END:
522
break;
555
523
default:
556
524
return ARGP_ERR_UNKNOWN;
557
525
}
558
return errno; /* Set to 0 at start */
526
return 0;
559
527
}
560
528
561
529
/* This option parser is the same as parse_opt() above, except it
563
531
error_t parse_opt_config_file(int key, char *arg,
564
532
__attribute__((unused))
565
533
struct argp_state *state){
566
errno = 0;
567
534
switch(key){
568
535
case 'g': /* --global-options */
569
536
case 'G': /* --global-env */
576
543
case 129: /* --config-file */
577
544
free(argfile);
578
545
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
548
}
579
549
break;
580
550
case 130: /* --userid */
581
551
case 131: /* --groupid */
582
552
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
586
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
587
555
break;
588
556
default:
589
557
return ARGP_ERR_UNKNOWN;
590
558
}
591
return errno;
559
return 0;
592
560
}
593
561
594
562
struct argp argp = { .options = options,
598
566
599
567
/* Parse using parse_opt_config_file() in order to get the custom
600
568
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;
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
571
fprintf(stderr, "Unknown error while parsing arguments\n");
572
exitstatus = EXIT_FAILURE;
615
573
goto fallback;
616
574
}
617
575
634
592
custom_argc = 1;
635
593
custom_argv = malloc(sizeof(char*) * 2);
636
594
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
639
597
goto fallback;
640
598
}
641
599
custom_argv[0] = argv[0];
657
615
}
658
616
new_arg = strdup(p);
659
617
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
662
620
free(org_line);
663
621
goto fallback;
664
622
}
667
625
custom_argv = realloc(custom_argv, sizeof(char *)
668
626
* ((unsigned int) custom_argc + 1));
669
627
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
672
630
free(org_line);
673
631
goto fallback;
674
632
}
680
638
ret = fclose(conffp);
681
639
} while(ret == EOF and errno == EINTR);
682
640
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
685
643
goto fallback;
686
644
}
687
645
free(org_line);
689
647
/* Check for harmful errors and go to fallback. Other errors might
690
648
not affect opening plugins */
691
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
694
652
goto fallback;
695
653
}
696
654
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
699
657
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;
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
661
fprintf(stderr, "Unknown error while parsing arguments\n");
662
exitstatus = EXIT_FAILURE;
714
663
goto fallback;
715
664
}
716
665
}
717
666
718
667
/* Parse actual command line arguments, to let them override the
719
668
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;
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
734
673
goto fallback;
735
674
}
736
675
748
687
}
749
688
}
750
689
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 */
690
/* Strip permissions down to nobody */
774
691
setgid(gid);
775
692
if(ret == -1){
776
error(0, errno, "setgid");
693
perror("setgid");
777
694
}
778
695
ret = setuid(uid);
779
696
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
697
perror("setuid");
698
}
699
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
704
}
705
706
if(dir == NULL){
707
perror("Could not open plugin dir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
784
713
{
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;
714
int dir_fd = dirfd(dir);
715
if(dir_fd >= 0){
716
ret = set_cloexec_flag(dir_fd);
717
if(ret < 0){
718
perror("set_cloexec_flag");
719
exitstatus = EXIT_FAILURE;
720
goto fallback;
721
}
826
722
}
827
723
}
828
724
837
733
/* All directory entries have been processed */
838
734
if(dirst == NULL){
839
735
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
736
perror("readdir");
737
exitstatus = EXIT_FAILURE;
842
738
goto fallback;
843
739
}
844
740
break;
874
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
771
size_t suf_len = strlen(*suf);
876
772
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
773
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
878
774
== 0)){
879
775
if(debug){
880
776
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
892
788
893
789
char *filename;
894
790
if(plugindir == NULL){
895
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
896
dirst->d_name));
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
897
793
} else {
898
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
899
plugindir,
900
dirst->d_name));
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
901
796
}
902
797
if(ret < 0){
903
error(0, errno, "asprintf");
798
perror("asprintf");
904
799
continue;
905
800
}
906
801
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
908
803
if(ret == -1){
909
error(0, errno, "stat");
804
perror("stat");
910
805
free(filename);
911
806
continue;
912
807
}
924
819
925
820
plugin *p = getplugin(dirst->d_name);
926
821
if(p == NULL){
927
error(0, errno, "getplugin");
822
perror("getplugin");
928
823
free(filename);
929
824
continue;
930
825
}
942
837
if(g != NULL){
943
838
for(char **a = g->argv + 1; *a != NULL; a++){
944
839
if(not add_argument(p, *a)){
945
error(0, errno, "add_argument");
840
perror("add_argument");
946
841
}
947
842
}
948
843
/* Add global environment variables */
949
844
for(char **e = g->environ; *e != NULL; e++){
950
845
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
846
perror("add_environment");
952
847
}
953
848
}
954
849
}
959
854
if(p->environ[0] != NULL){
960
855
for(char **e = environ; *e != NULL; e++){
961
856
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
857
perror("add_environment");
963
858
}
964
859
}
965
860
}
966
861
967
862
int pipefd[2];
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
969
864
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
972
867
goto fallback;
973
868
}
974
869
/* Ask OS to automatic close the pipe on exec */
975
870
ret = set_cloexec_flag(pipefd[0]);
976
871
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
979
874
goto fallback;
980
875
}
981
876
ret = set_cloexec_flag(pipefd[1]);
982
877
if(ret < 0){
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
985
880
goto fallback;
986
881
}
987
882
/* Block SIGCHLD until process is safely in process list */
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
990
NULL));
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
991
886
if(ret < 0){
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
994
889
goto fallback;
995
890
}
996
891
/* Starting a new process to be watched */
999
894
pid = fork();
1000
895
} while(pid == -1 and errno == EINTR);
1001
896
if(pid == -1){
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1004
899
goto fallback;
1005
900
}
1006
901
if(pid == 0){
1007
902
/* this is the child process */
1008
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1009
904
if(ret < 0){
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1012
907
}
1013
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1014
909
if(ret < 0){
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1017
912
}
1018
913
1019
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1020
915
if(ret == -1){
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1023
918
}
1024
919
1025
920
if(dirfd(dir) < 0){
1029
924
}
1030
925
if(p->environ[0] == NULL){
1031
926
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
927
perror("execv");
928
_exit(EXIT_FAILURE);
1034
929
}
1035
930
} else {
1036
931
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
932
perror("execve");
933
_exit(EXIT_FAILURE);
1039
934
}
1040
935
}
1041
936
/* no return */
1046
941
free(filename);
1047
942
plugin *new_plugin = getplugin(dirst->d_name);
1048
943
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
NULL)));
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1053
948
if(ret < 0){
1054
error(0, errno, "sigprocmask");
949
perror("sigprocmask");
1055
950
}
1056
exitstatus = EX_OSERR;
951
exitstatus = EXIT_FAILURE;
1057
952
goto fallback;
1058
953
}
1059
954
1062
957
1063
958
/* Unblock SIGCHLD so signal handler can be run if this process
1064
959
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1068
963
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1071
966
goto fallback;
1072
967
}
1073
968
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
969
FD_SET(new_plugin->fd, &rfds_all);
1076
970
1077
971
if(maxfd < new_plugin->fd){
1078
972
maxfd = new_plugin->fd;
1099
993
fd_set rfds = rfds_all;
1100
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1101
995
if(select_ret == -1 and errno != EINTR){
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1104
998
goto fallback;
1105
999
}
1106
1000
/* OK, now either a process completed, or something can be read
1132
1026
}
1133
1027
1134
1028
/* Remove the plugin */
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1029
FD_CLR(proc->fd, &rfds_all);
1137
1030
1138
1031
/* Block signal while modifying process_list */
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1140
(SIG_BLOCK,
1141
&sigchld_action.sa_mask,
1142
NULL));
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1143
1035
if(ret < 0){
1144
error(0, errno, "sigprocmask");
1145
exitstatus = EX_OSERR;
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1146
1038
goto fallback;
1147
1039
}
1148
1040
1151
1043
proc = next_plugin;
1152
1044
1153
1045
/* We are done modifying process list, so unblock signal */
1154
ret = (int)(TEMP_FAILURE_RETRY
1155
(sigprocmask(SIG_UNBLOCK,
1156
&sigchld_action.sa_mask, NULL)));
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1157
1049
if(ret < 0){
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1160
1052
goto fallback;
1161
1053
}
1162
1054
1172
1064
bool bret = print_out_password(proc->buffer,
1173
1065
proc->buffer_length);
1174
1066
if(not bret){
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1177
1069
}
1178
1070
goto fallback;
1179
1071
}
1180
1072
1181
1073
/* 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 */
1074
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1185
1075
/* This process had nothing to say at this time */
1186
1076
proc = proc->next;
1187
1077
continue;
1191
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
1082
+ (size_t) BUFFER_SIZE);
1193
1083
if(proc->buffer == NULL){
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
1084
perror("malloc");
1085
exitstatus = EXIT_FAILURE;
1196
1086
goto fallback;
1197
1087
}
1198
1088
proc->buffer_size += BUFFER_SIZE;
1219
1109
1220
1110
fallback:
1221
1111
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1224
1113
/* Fallback if all plugins failed, none are found or an error
1225
1114
occured */
1226
1115
bool bret;
1234
1123
}
1235
1124
bret = print_out_password(passwordbuffer, len);
1236
1125
if(not bret){
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1239
1128
}
1240
1129
}
1241
1130
1242
1131
/* Restore old signal handler */
1243
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1244
1133
if(ret == -1){
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1247
1136
}
1248
1137
1249
1138
if(custom_argv != NULL){
1264
1153
ret = kill(p->pid, SIGTERM);
1265
1154
if(ret == -1 and errno != ESRCH){
1266
1155
/* Set-uid proccesses might not get closed */
1267
error(0, errno, "kill");
1156
perror("kill");
1268
1157
}
1269
1158
}
1270
1159
}
1274
1163
ret = wait(NULL);
1275
1164
} while(ret >= 0);
1276
1165
if(errno != ECHILD){
1277
error(0, errno, "wait");
1166
perror("wait");
1278
1167
}
1279
1168
1280
1169
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0