To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 373
- compare with another revision
- download diff
- download tarball
- view history from revision 373
- Committer: Teddy Hogeborn
- Date: 2009-09-17 04:16:32 UTC
- Revision ID: teddy@fukt.bsnet.se-20090917041632-7m1rm83pxguw5zw7
* plugins.d/usplash.c (main): Bug fix: only close FIFO if opened.
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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 */
178
char **new_array = NULL;
179
167
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
183
171
/* Malloc check */
184
if(new_array == NULL){
172
if(*array == NULL){
185
173
return false;
186
174
}
187
*array = new_array;
188
175
/* Make a copy of the new string */
189
176
char *copy;
190
177
do {
202
189
}
203
190
204
191
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
206
192
static bool add_argument(plugin *p, const char *arg){
207
193
if(p == NULL){
208
194
return false;
211
197
}
212
198
213
199
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
215
200
static bool add_environment(plugin *p, const char *def, bool replace){
216
201
if(p == NULL){
217
202
return false;
219
204
/* namelen = length of name of environment variable */
220
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
206
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
224
209
/* It already exists */
225
210
if(replace){
226
char *new_envdef;
211
char *new;
227
212
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
231
216
return false;
232
217
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
235
220
}
236
221
return true;
237
222
}
273
258
/* No child processes */
274
259
break;
275
260
}
276
error(0, errno, "waitpid");
261
perror("waitpid");
277
262
}
278
263
279
264
/* A child exited, find it in process_list */
291
276
}
292
277
293
278
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
279
static bool print_out_password(const char *buffer, size_t length){
296
280
ssize_t ret;
297
281
for(size_t written = 0; written < length; written += (size_t)ret){
305
289
}
306
290
307
291
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
292
static void free_plugin(plugin *plugin_node){
310
293
311
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
366
349
sigemptyset(&sigchld_action.sa_mask);
367
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
368
351
if(ret == -1){
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
371
354
goto fallback;
372
355
}
373
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
374
357
if(ret == -1){
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
377
360
goto fallback;
378
361
}
379
362
411
394
.doc = "Group ID the plugins will run as", .group = 3 },
412
395
{ .name = "debug", .key = 132,
413
396
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
423
397
{ .name = NULL }
424
398
};
425
399
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
429
402
switch(key){
430
403
char *tmp;
431
intmax_t tmp_id;
404
intmax_t tmpmax;
432
405
case 'g': /* --global-options */
433
{
406
if(arg != NULL){
434
407
char *plugin_option;
435
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
436
412
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
438
415
}
439
416
}
440
417
}
441
418
break;
442
419
case 'G': /* --global-env */
443
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
}
444
426
break;
445
427
case 'o': /* --options-for */
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
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;
464
438
}
465
439
}
466
440
}
467
441
break;
468
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
469
446
{
470
447
char *envdef = strchr(arg, ':');
471
448
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
449
break;
475
450
}
476
451
*envdef = '\0';
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
482
454
}
483
add_environment(getplugin(arg), envdef, true);
484
455
}
485
456
break;
486
457
case 'd': /* --disable */
487
{
458
if(arg != NULL){
488
459
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
491
462
}
463
p->disabled = true;
492
464
}
493
465
break;
494
466
case 'e': /* --enable */
495
{
467
if(arg != NULL){
496
468
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
499
471
}
472
p->disabled = false;
500
473
}
501
474
break;
502
475
case 128: /* --plugin-dir */
503
476
free(plugindir);
504
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
505
481
break;
506
482
case 129: /* --config-file */
507
483
/* This is already done by parse_opt_config_file() */
508
484
break;
509
485
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
511
488
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
489
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;
516
494
}
517
uid = (uid_t)tmp_id;
518
495
break;
519
496
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
521
499
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
500
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;
526
505
}
527
gid = (gid_t)tmp_id;
528
506
break;
529
507
case 132: /* --debug */
530
508
debug = true;
531
509
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
510
/*
547
511
* When adding more options before this line, remember to also add a
548
512
* "case" to the "parse_opt_config_file" function below.
551
515
/* Cryptsetup always passes an argument, which is an empty
552
516
string if "none" was specified in /etc/crypttab. So if
553
517
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
556
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
557
524
default:
558
525
return ARGP_ERR_UNKNOWN;
559
526
}
560
return errno; /* Set to 0 at start */
527
return 0;
561
528
}
562
529
563
530
/* This option parser is the same as parse_opt() above, except it
565
532
error_t parse_opt_config_file(int key, char *arg,
566
533
__attribute__((unused))
567
534
struct argp_state *state){
568
errno = 0;
569
535
switch(key){
570
536
case 'g': /* --global-options */
571
537
case 'G': /* --global-env */
578
544
case 129: /* --config-file */
579
545
free(argfile);
580
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
581
550
break;
582
551
case 130: /* --userid */
583
552
case 131: /* --groupid */
584
553
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
589
556
break;
590
557
default:
591
558
return ARGP_ERR_UNKNOWN;
592
559
}
593
return errno;
560
return 0;
594
561
}
595
562
596
563
struct argp argp = { .options = options,
600
567
601
568
/* Parse using parse_opt_config_file() in order to get the custom
602
569
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
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;
617
574
goto fallback;
618
575
}
619
576
636
593
custom_argc = 1;
637
594
custom_argv = malloc(sizeof(char*) * 2);
638
595
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
641
598
goto fallback;
642
599
}
643
600
custom_argv[0] = argv[0];
659
616
}
660
617
new_arg = strdup(p);
661
618
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
664
621
free(org_line);
665
622
goto fallback;
666
623
}
667
624
668
625
custom_argc += 1;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
682
633
}
683
634
custom_argv[custom_argc-1] = new_arg;
684
635
custom_argv[custom_argc] = NULL;
688
639
ret = fclose(conffp);
689
640
} while(ret == EOF and errno == EINTR);
690
641
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
693
644
goto fallback;
694
645
}
695
646
free(org_line);
697
648
/* Check for harmful errors and go to fallback. Other errors might
698
649
not affect opening plugins */
699
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
702
653
goto fallback;
703
654
}
704
655
}
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
707
658
if(custom_argv != NULL){
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
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;
722
664
goto fallback;
723
665
}
724
666
}
725
667
726
668
/* Parse actual command line arguments, to let them override the
727
669
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
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;
742
674
goto fallback;
743
675
}
744
676
756
688
}
757
689
}
758
690
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
691
/* Strip permissions down to nobody */
692
setgid(gid);
783
693
if(ret == -1){
784
error(0, errno, "setgid");
694
perror("setgid");
785
695
}
786
696
ret = setuid(uid);
787
697
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* 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 */
792
714
{
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
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
}
834
723
}
835
724
}
836
725
845
734
/* All directory entries have been processed */
846
735
if(dirst == NULL){
847
736
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
850
739
goto fallback;
851
740
}
852
741
break;
858
747
{
859
748
bool bad_name = false;
860
749
861
const char * const bad_prefixes[] = { ".", "#", NULL };
750
const char const *bad_prefixes[] = { ".", "#", NULL };
862
751
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
752
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
864
753
".dpkg-old",
865
754
".dpkg-bak",
866
755
".dpkg-divert", NULL };
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
756
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
876
757
size_t pre_len = strlen(*pre);
877
758
if((d_name_len >= pre_len)
878
759
and strncmp((dirst->d_name), *pre, pre_len) == 0){
887
768
if(bad_name){
888
769
continue;
889
770
}
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
771
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
899
772
size_t suf_len = strlen(*suf);
900
773
if((d_name_len >= suf_len)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
902
775
== 0)){
903
776
if(debug){
904
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
924
797
dirst->d_name));
925
798
}
926
799
if(ret < 0){
927
error(0, errno, "asprintf");
800
perror("asprintf");
928
801
continue;
929
802
}
930
803
931
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
805
if(ret == -1){
933
error(0, errno, "stat");
806
perror("stat");
934
807
free(filename);
935
808
continue;
936
809
}
948
821
949
822
plugin *p = getplugin(dirst->d_name);
950
823
if(p == NULL){
951
error(0, errno, "getplugin");
824
perror("getplugin");
952
825
free(filename);
953
826
continue;
954
827
}
966
839
if(g != NULL){
967
840
for(char **a = g->argv + 1; *a != NULL; a++){
968
841
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
842
perror("add_argument");
970
843
}
971
844
}
972
845
/* Add global environment variables */
973
846
for(char **e = g->environ; *e != NULL; e++){
974
847
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
848
perror("add_environment");
976
849
}
977
850
}
978
851
}
983
856
if(p->environ[0] != NULL){
984
857
for(char **e = environ; *e != NULL; e++){
985
858
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
859
perror("add_environment");
987
860
}
988
861
}
989
862
}
991
864
int pipefd[2];
992
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
866
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
996
869
goto fallback;
997
870
}
998
871
/* Ask OS to automatic close the pipe on exec */
999
872
ret = set_cloexec_flag(pipefd[0]);
1000
873
if(ret < 0){
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
1003
876
goto fallback;
1004
877
}
1005
878
ret = set_cloexec_flag(pipefd[1]);
1006
879
if(ret < 0){
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
1009
882
goto fallback;
1010
883
}
1011
884
/* Block SIGCHLD until process is safely in process list */
1013
886
&sigchld_action.sa_mask,
1014
887
NULL));
1015
888
if(ret < 0){
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
1018
891
goto fallback;
1019
892
}
1020
893
/* Starting a new process to be watched */
1023
896
pid = fork();
1024
897
} while(pid == -1 and errno == EINTR);
1025
898
if(pid == -1){
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
1028
901
goto fallback;
1029
902
}
1030
903
if(pid == 0){
1031
904
/* this is the child process */
1032
905
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1033
906
if(ret < 0){
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1036
909
}
1037
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
911
if(ret < 0){
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1041
914
}
1042
915
1043
916
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1044
917
if(ret == -1){
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1047
920
}
1048
921
1049
922
if(dirfd(dir) < 0){
1053
926
}
1054
927
if(p->environ[0] == NULL){
1055
928
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
929
perror("execv");
930
_exit(EXIT_FAILURE);
1058
931
}
1059
932
} else {
1060
933
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
934
perror("execve");
935
_exit(EXIT_FAILURE);
1063
936
}
1064
937
}
1065
938
/* no return */
1070
943
free(filename);
1071
944
plugin *new_plugin = getplugin(dirst->d_name);
1072
945
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
946
perror("getplugin");
1074
947
ret = (int)(TEMP_FAILURE_RETRY
1075
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
949
NULL)));
1077
950
if(ret < 0){
1078
error(0, errno, "sigprocmask");
951
perror("sigprocmask");
1079
952
}
1080
exitstatus = EX_OSERR;
953
exitstatus = EXIT_FAILURE;
1081
954
goto fallback;
1082
955
}
1083
956
1090
963
&sigchld_action.sa_mask,
1091
964
NULL));
1092
965
if(ret < 0){
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1095
968
goto fallback;
1096
969
}
1097
970
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
971
FD_SET(new_plugin->fd, &rfds_all);
1112
972
1113
973
if(maxfd < new_plugin->fd){
1114
974
maxfd = new_plugin->fd;
1135
995
fd_set rfds = rfds_all;
1136
996
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1137
997
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
998
perror("select");
999
exitstatus = EXIT_FAILURE;
1140
1000
goto fallback;
1141
1001
}
1142
1002
/* OK, now either a process completed, or something can be read
1168
1028
}
1169
1029
1170
1030
/* Remove the plugin */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1031
FD_CLR(proc->fd, &rfds_all);
1185
1032
1186
1033
/* Block signal while modifying process_list */
1187
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1189
1036
&sigchld_action.sa_mask,
1190
1037
NULL));
1191
1038
if(ret < 0){
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
1039
perror("sigprocmask");
1040
exitstatus = EXIT_FAILURE;
1194
1041
goto fallback;
1195
1042
}
1196
1043
1203
1050
(sigprocmask(SIG_UNBLOCK,
1204
1051
&sigchld_action.sa_mask, NULL)));
1205
1052
if(ret < 0){
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1053
perror("sigprocmask");
1054
exitstatus = EXIT_FAILURE;
1208
1055
goto fallback;
1209
1056
}
1210
1057
1220
1067
bool bret = print_out_password(proc->buffer,
1221
1068
proc->buffer_length);
1222
1069
if(not bret){
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
1225
1072
}
1226
1073
goto fallback;
1227
1074
}
1228
1075
1229
1076
/* This process has not completed. Does it have any output? */
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
1077
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1247
1078
/* This process had nothing to say at this time */
1248
1079
proc = proc->next;
1249
1080
continue;
1250
1081
}
1251
1082
/* Before reading, make the process' data buffer large enough */
1252
1083
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1084
proc->buffer = realloc(proc->buffer, proc->buffer_size
1085
+ (size_t) BUFFER_SIZE);
1086
if(proc->buffer == NULL){
1087
perror("malloc");
1088
exitstatus = EXIT_FAILURE;
1258
1089
goto fallback;
1259
1090
}
1260
proc->buffer = new_buffer;
1261
1091
proc->buffer_size += BUFFER_SIZE;
1262
1092
}
1263
1093
/* Read from the process */
1282
1112
1283
1113
fallback:
1284
1114
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1115
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1287
1116
/* Fallback if all plugins failed, none are found or an error
1288
1117
occured */
1289
1118
bool bret;
1297
1126
}
1298
1127
bret = print_out_password(passwordbuffer, len);
1299
1128
if(not bret){
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1129
perror("print_out_password");
1130
exitstatus = EXIT_FAILURE;
1302
1131
}
1303
1132
}
1304
1133
1305
1134
/* Restore old signal handler */
1306
1135
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1307
1136
if(ret == -1){
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1137
perror("sigaction");
1138
exitstatus = EXIT_FAILURE;
1310
1139
}
1311
1140
1312
1141
if(custom_argv != NULL){
1327
1156
ret = kill(p->pid, SIGTERM);
1328
1157
if(ret == -1 and errno != ESRCH){
1329
1158
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1159
perror("kill");
1331
1160
}
1332
1161
}
1333
1162
}
1337
1166
ret = wait(NULL);
1338
1167
} while(ret >= 0);
1339
1168
if(errno != ECHILD){
1340
error(0, errno, "wait");
1169
perror("wait");
1341
1170
}
1342
1171
1343
1172
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0