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- Committer: Teddy Hogeborn
- Date: 2009-02-23 11:52:42 UTC
- Revision ID: teddy@fukt.bsnet.se-20090223115242-5930ewin7m4o6zpr
* README (The Plugin System): Improve wording.
- files removed:
- dbus-mandos.conf
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
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
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(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
68
66
*/
69
67
#include <errno.h> /* errno, EBADF */
70
68
#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
69
74
70
#define BUFFER_SIZE 256
75
71
104
100
/* Gets an existing plugin based on name,
105
101
or if none is found, creates a new one */
106
102
static plugin *getplugin(char *name){
107
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
108
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
109
105
if((p->name == name)
110
106
or (p->name and name and (strcmp(p->name, name) == 0))){
112
108
}
113
109
}
114
110
/* Create a new plugin */
115
plugin *new_plugin = NULL;
116
do {
117
new_plugin = malloc(sizeof(plugin));
118
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
119
112
if(new_plugin == NULL){
120
113
return NULL;
121
114
}
122
115
char *copy_name = NULL;
123
116
if(name != NULL){
124
do {
125
copy_name = strdup(name);
126
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
127
118
if(copy_name == NULL){
128
int e = errno;
129
119
free(new_plugin);
130
errno = e;
131
120
return NULL;
132
121
}
133
122
}
137
126
.disabled = false,
138
127
.next = plugin_list };
139
128
140
do {
141
new_plugin->argv = malloc(sizeof(char *) * 2);
142
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
143
130
if(new_plugin->argv == NULL){
144
int e = errno;
145
131
free(copy_name);
146
132
free(new_plugin);
147
errno = e;
148
133
return NULL;
149
134
}
150
135
new_plugin->argv[0] = copy_name;
151
136
new_plugin->argv[1] = NULL;
152
137
153
do {
154
new_plugin->environ = malloc(sizeof(char *));
155
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
156
139
if(new_plugin->environ == NULL){
157
int e = errno;
158
140
free(copy_name);
159
141
free(new_plugin->argv);
160
142
free(new_plugin);
161
errno = e;
162
143
return NULL;
163
144
}
164
145
new_plugin->environ[0] = NULL;
172
153
static bool add_to_char_array(const char *new, char ***array,
173
154
int *len){
174
155
/* Resize the pointed-to array to hold one more pointer */
175
do {
176
*array = realloc(*array, sizeof(char *)
177
* (size_t) ((*len) + 2));
178
} while(*array == NULL and errno == EINTR);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
179
158
/* Malloc check */
180
159
if(*array == NULL){
181
160
return false;
182
161
}
183
162
/* Make a copy of the new string */
184
char *copy;
185
do {
186
copy = strdup(new);
187
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
188
164
if(copy == NULL){
189
165
return false;
190
166
}
216
192
if(strncmp(*e, def, namelen + 1) == 0){
217
193
/* It already exists */
218
194
if(replace){
219
char *new;
220
do {
221
new = realloc(*e, strlen(def) + 1);
222
} while(new == NULL and errno == EINTR);
195
char *new = realloc(*e, strlen(def) + 1);
223
196
if(new == NULL){
224
197
return false;
225
198
}
235
208
/*
236
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
237
210
* Descriptor Flags".
238
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
239
212
*/
240
213
static int set_cloexec_flag(int fd){
241
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
242
215
/* If reading the flags failed, return error indication now. */
243
216
if(ret < 0){
244
217
return ret;
245
218
}
246
219
/* Store modified flag word in the descriptor. */
247
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
248
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
221
}
250
222
251
223
343
315
fd_set rfds_all;
344
316
int ret, maxfd = 0;
345
317
ssize_t sret;
318
intmax_t tmpmax;
346
319
uid_t uid = 65534;
347
320
gid_t gid = 65534;
348
321
bool debug = false;
358
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
359
332
if(ret == -1){
360
333
perror("sigaddset");
361
exitstatus = EX_OSERR;
334
exitstatus = EXIT_FAILURE;
362
335
goto fallback;
363
336
}
364
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
365
338
if(ret == -1){
366
339
perror("sigaction");
367
exitstatus = EX_OSERR;
340
exitstatus = EXIT_FAILURE;
368
341
goto fallback;
369
342
}
370
343
402
375
.doc = "Group ID the plugins will run as", .group = 3 },
403
376
{ .name = "debug", .key = 132,
404
377
.doc = "Debug mode", .group = 4 },
405
/*
406
* These reproduce what we would get without ARGP_NO_HELP
407
*/
408
{ .name = "help", .key = '?',
409
.doc = "Give this help list", .group = -1 },
410
{ .name = "usage", .key = -3,
411
.doc = "Give a short usage message", .group = -1 },
412
{ .name = "version", .key = 'V',
413
.doc = "Print program version", .group = -1 },
414
378
{ .name = NULL }
415
379
};
416
380
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
418
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
383
char *tmp;
419
384
switch(key){
420
char *tmp;
421
intmax_t tmpmax;
422
385
case 'g': /* --global-options */
423
{
386
if(arg != NULL){
424
387
char *plugin_option;
425
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
426
392
if(not add_argument(getplugin(NULL), plugin_option)){
427
break;
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
428
395
}
429
396
}
430
397
}
431
398
break;
432
399
case 'G': /* --global-env */
433
add_environment(getplugin(NULL), arg, true);
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
405
}
434
406
break;
435
407
case 'o': /* --options-for */
436
{
437
char *option_list = strchr(arg, ':');
438
if(option_list == NULL){
439
argp_error(state, "No colon in \"%s\"", arg);
440
errno = EINVAL;
441
break;
442
}
443
*option_list = '\0';
444
option_list++;
445
if(arg[0] == '\0'){
446
argp_error(state, "Empty plugin name");
447
errno = EINVAL;
448
break;
449
}
450
char *option;
451
while((option = strsep(&option_list, ",")) != NULL){
452
if(not add_argument(getplugin(arg), option)){
453
break;
408
if(arg != NULL){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
411
break;
412
}
413
char *plugin_option;
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
454
418
}
455
419
}
456
420
}
457
421
break;
458
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
459
426
{
460
427
char *envdef = strchr(arg, ':');
461
428
if(envdef == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
429
break;
465
430
}
466
431
*envdef = '\0';
467
envdef++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
472
434
}
473
add_environment(getplugin(arg), envdef, true);
474
435
}
475
436
break;
476
437
case 'd': /* --disable */
477
{
438
if(arg != NULL){
478
439
plugin *p = getplugin(arg);
479
if(p != NULL){
480
p->disabled = true;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
481
442
}
443
p->disabled = true;
482
444
}
483
445
break;
484
446
case 'e': /* --enable */
485
{
447
if(arg != NULL){
486
448
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = false;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
489
451
}
452
p->disabled = false;
490
453
}
491
454
break;
492
455
case 128: /* --plugin-dir */
493
456
free(plugindir);
494
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
495
461
break;
496
462
case 129: /* --config-file */
497
463
/* This is already done by parse_opt_config_file() */
498
464
break;
499
465
case 130: /* --userid */
466
errno = 0;
500
467
tmpmax = strtoimax(arg, &tmp, 10);
501
468
if(errno != 0 or tmp == arg or *tmp != '\0'
502
469
or tmpmax != (uid_t)tmpmax){
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
505
break;
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
472
} else {
473
uid = (uid_t)tmpmax;
506
474
}
507
uid = (uid_t)tmpmax;
508
475
break;
509
476
case 131: /* --groupid */
477
errno = 0;
510
478
tmpmax = strtoimax(arg, &tmp, 10);
511
479
if(errno != 0 or tmp == arg or *tmp != '\0'
512
480
or tmpmax != (gid_t)tmpmax){
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
515
break;
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
516
485
}
517
gid = (gid_t)tmpmax;
518
486
break;
519
487
case 132: /* --debug */
520
488
debug = true;
521
489
break;
522
/*
523
* These reproduce what we would get without ARGP_NO_HELP
524
*/
525
case '?': /* --help */
526
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
527
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
528
case -3: /* --usage */
529
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
530
argp_state_help(state, state->out_stream,
531
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
532
case 'V': /* --version */
533
fprintf(state->out_stream, "%s\n", argp_program_version);
534
exit(EXIT_SUCCESS);
535
break;
536
490
/*
537
491
* When adding more options before this line, remember to also add a
538
492
* "case" to the "parse_opt_config_file" function below.
541
495
/* Cryptsetup always passes an argument, which is an empty
542
496
string if "none" was specified in /etc/crypttab. So if
543
497
argument was empty, we ignore it silently. */
544
if(arg[0] == '\0'){
545
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
546
500
}
501
break;
502
case ARGP_KEY_END:
503
break;
547
504
default:
548
505
return ARGP_ERR_UNKNOWN;
549
506
}
550
return errno; /* Set to 0 at start */
507
return 0;
551
508
}
552
509
553
510
/* This option parser is the same as parse_opt() above, except it
555
512
error_t parse_opt_config_file(int key, char *arg,
556
513
__attribute__((unused))
557
514
struct argp_state *state){
558
errno = 0;
559
515
switch(key){
560
516
case 'g': /* --global-options */
561
517
case 'G': /* --global-env */
568
524
case 129: /* --config-file */
569
525
free(argfile);
570
526
argfile = strdup(arg);
571
break;
527
if(argfile == NULL){
528
perror("strdup");
529
}
530
break;
572
531
case 130: /* --userid */
573
532
case 131: /* --groupid */
574
533
case 132: /* --debug */
575
case '?': /* --help */
576
case -3: /* --usage */
577
case 'V': /* --version */
578
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
579
536
break;
580
537
default:
581
538
return ARGP_ERR_UNKNOWN;
582
539
}
583
return errno;
540
return 0;
584
541
}
585
542
586
543
struct argp argp = { .options = options,
590
547
591
548
/* Parse using parse_opt_config_file() in order to get the custom
592
549
config file location, if any. */
593
ret = argp_parse(&argp, argc, argv,
594
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
595
NULL, NULL);
596
switch(ret){
597
case 0:
598
break;
599
case ENOMEM:
600
default:
601
errno = ret;
602
perror("argp_parse");
603
exitstatus = EX_OSERR;
604
goto fallback;
605
case EINVAL:
606
exitstatus = EX_USAGE;
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
607
554
goto fallback;
608
555
}
609
556
615
562
conffp = fopen(AFILE, "r");
616
563
} else {
617
564
conffp = fopen(argfile, "r");
618
}
565
}
619
566
if(conffp != NULL){
620
567
char *org_line = NULL;
621
568
char *p, *arg, *new_arg, *line;
627
574
custom_argv = malloc(sizeof(char*) * 2);
628
575
if(custom_argv == NULL){
629
576
perror("malloc");
630
exitstatus = EX_OSERR;
577
exitstatus = EXIT_FAILURE;
631
578
goto fallback;
632
579
}
633
580
custom_argv[0] = argv[0];
650
597
new_arg = strdup(p);
651
598
if(new_arg == NULL){
652
599
perror("strdup");
653
exitstatus = EX_OSERR;
600
exitstatus = EXIT_FAILURE;
654
601
free(org_line);
655
602
goto fallback;
656
603
}
660
607
* ((unsigned int) custom_argc + 1));
661
608
if(custom_argv == NULL){
662
609
perror("realloc");
663
exitstatus = EX_OSERR;
610
exitstatus = EXIT_FAILURE;
664
611
free(org_line);
665
612
goto fallback;
666
613
}
667
614
custom_argv[custom_argc-1] = new_arg;
668
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
669
616
}
670
617
}
671
do {
672
ret = fclose(conffp);
673
} while(ret == EOF and errno == EINTR);
674
if(ret == EOF){
675
perror("fclose");
676
exitstatus = EX_IOERR;
677
goto fallback;
678
}
679
618
free(org_line);
680
619
} else {
681
620
/* Check for harmful errors and go to fallback. Other errors might
682
621
not affect opening plugins */
683
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
684
623
perror("fopen");
685
exitstatus = EX_OSERR;
624
exitstatus = EXIT_FAILURE;
686
625
goto fallback;
687
626
}
688
627
}
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
691
630
if(custom_argv != NULL){
692
ret = argp_parse(&argp, custom_argc, custom_argv,
693
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
694
NULL, NULL);
695
switch(ret){
696
case 0:
697
break;
698
case ENOMEM:
699
default:
700
errno = ret;
701
perror("argp_parse");
702
exitstatus = EX_OSERR;
703
goto fallback;
704
case EINVAL:
705
exitstatus = EX_CONFIG;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
706
636
goto fallback;
707
637
}
708
638
}
709
639
710
640
/* Parse actual command line arguments, to let them override the
711
641
config file */
712
ret = argp_parse(&argp, argc, argv,
713
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
714
NULL, NULL);
715
switch(ret){
716
case 0:
717
break;
718
case ENOMEM:
719
default:
720
errno = ret;
721
perror("argp_parse");
722
exitstatus = EX_OSERR;
723
goto fallback;
724
case EINVAL:
725
exitstatus = EX_USAGE;
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
726
646
goto fallback;
727
647
}
728
648
750
670
perror("setuid");
751
671
}
752
672
753
/* Open plugin directory with close_on_exec flag */
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
754
686
{
755
int dir_fd = -1;
756
if(plugindir == NULL){
757
dir_fd = open(PDIR, O_RDONLY |
758
#ifdef O_CLOEXEC
759
O_CLOEXEC
760
#else /* not O_CLOEXEC */
761
0
762
#endif /* not O_CLOEXEC */
763
);
764
} else {
765
dir_fd = open(plugindir, O_RDONLY |
766
#ifdef O_CLOEXEC
767
O_CLOEXEC
768
#else /* not O_CLOEXEC */
769
0
770
#endif /* not O_CLOEXEC */
771
);
772
}
773
if(dir_fd == -1){
774
perror("Could not open plugin dir");
775
exitstatus = EX_UNAVAILABLE;
776
goto fallback;
777
}
778
779
#ifndef O_CLOEXEC
780
/* Set the FD_CLOEXEC flag on the directory */
781
ret = set_cloexec_flag(dir_fd);
782
if(ret < 0){
783
perror("set_cloexec_flag");
784
TEMP_FAILURE_RETRY(close(dir_fd));
785
exitstatus = EX_OSERR;
786
goto fallback;
787
}
788
#endif /* O_CLOEXEC */
789
790
dir = fdopendir(dir_fd);
791
if(dir == NULL){
792
perror("Could not open plugin dir");
793
TEMP_FAILURE_RETRY(close(dir_fd));
794
exitstatus = EX_OSERR;
795
goto fallback;
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
694
}
796
695
}
797
696
}
798
697
800
699
801
700
/* Read and execute any executable in the plugin directory*/
802
701
while(true){
803
do {
804
dirst = readdir(dir);
805
} while(dirst == NULL and errno == EINTR);
702
dirst = readdir(dir);
806
703
807
704
/* All directory entries have been processed */
808
705
if(dirst == NULL){
809
706
if(errno == EBADF){
810
707
perror("readdir");
811
exitstatus = EX_IOERR;
708
exitstatus = EXIT_FAILURE;
812
709
goto fallback;
813
710
}
814
711
break;
862
759
863
760
char *filename;
864
761
if(plugindir == NULL){
865
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
866
dirst->d_name));
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
867
763
} else {
868
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
869
plugindir,
870
dirst->d_name));
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
871
765
}
872
766
if(ret < 0){
873
767
perror("asprintf");
874
768
continue;
875
769
}
876
770
877
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
771
ret = stat(filename, &st);
878
772
if(ret == -1){
879
773
perror("stat");
880
774
free(filename);
882
776
}
883
777
884
778
/* Ignore non-executable files */
885
if(not S_ISREG(st.st_mode)
886
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
887
780
if(debug){
888
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
782
" with bad type or mode\n", filename);
935
828
}
936
829
937
830
int pipefd[2];
938
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
831
ret = pipe(pipefd);
939
832
if(ret == -1){
940
833
perror("pipe");
941
exitstatus = EX_OSERR;
834
exitstatus = EXIT_FAILURE;
942
835
goto fallback;
943
836
}
944
837
/* Ask OS to automatic close the pipe on exec */
945
838
ret = set_cloexec_flag(pipefd[0]);
946
839
if(ret < 0){
947
840
perror("set_cloexec_flag");
948
exitstatus = EX_OSERR;
841
exitstatus = EXIT_FAILURE;
949
842
goto fallback;
950
843
}
951
844
ret = set_cloexec_flag(pipefd[1]);
952
845
if(ret < 0){
953
846
perror("set_cloexec_flag");
954
exitstatus = EX_OSERR;
847
exitstatus = EXIT_FAILURE;
955
848
goto fallback;
956
849
}
957
850
/* Block SIGCHLD until process is safely in process list */
958
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
959
&sigchld_action.sa_mask,
960
NULL));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
961
852
if(ret < 0){
962
853
perror("sigprocmask");
963
exitstatus = EX_OSERR;
854
exitstatus = EXIT_FAILURE;
964
855
goto fallback;
965
856
}
966
857
/* Starting a new process to be watched */
967
pid_t pid;
968
do {
969
pid = fork();
970
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
971
859
if(pid == -1){
972
860
perror("fork");
973
exitstatus = EX_OSERR;
861
exitstatus = EXIT_FAILURE;
974
862
goto fallback;
975
863
}
976
864
if(pid == 0){
978
866
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
979
867
if(ret < 0){
980
868
perror("sigaction");
981
_exit(EX_OSERR);
869
_exit(EXIT_FAILURE);
982
870
}
983
871
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
984
872
if(ret < 0){
985
873
perror("sigprocmask");
986
_exit(EX_OSERR);
874
_exit(EXIT_FAILURE);
987
875
}
988
876
989
877
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
990
878
if(ret == -1){
991
879
perror("dup2");
992
_exit(EX_OSERR);
880
_exit(EXIT_FAILURE);
993
881
}
994
882
995
883
if(dirfd(dir) < 0){
1000
888
if(p->environ[0] == NULL){
1001
889
if(execv(filename, p->argv) < 0){
1002
890
perror("execv");
1003
_exit(EX_OSERR);
891
_exit(EXIT_FAILURE);
1004
892
}
1005
893
} else {
1006
894
if(execve(filename, p->argv, p->environ) < 0){
1007
895
perror("execve");
1008
_exit(EX_OSERR);
896
_exit(EXIT_FAILURE);
1009
897
}
1010
898
}
1011
899
/* no return */
1012
900
}
1013
901
/* Parent process */
1014
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1015
pipe */
902
close(pipefd[1]); /* Close unused write end of pipe */
1016
903
free(filename);
1017
904
plugin *new_plugin = getplugin(dirst->d_name);
1018
905
if(new_plugin == NULL){
1019
906
perror("getplugin");
1020
ret = (int)(TEMP_FAILURE_RETRY
1021
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1022
NULL)));
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1023
908
if(ret < 0){
1024
909
perror("sigprocmask");
1025
910
}
1026
exitstatus = EX_OSERR;
911
exitstatus = EXIT_FAILURE;
1027
912
goto fallback;
1028
913
}
1029
914
1032
917
1033
918
/* Unblock SIGCHLD so signal handler can be run if this process
1034
919
has already completed */
1035
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1036
&sigchld_action.sa_mask,
1037
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
921
if(ret < 0){
1039
922
perror("sigprocmask");
1040
exitstatus = EX_OSERR;
923
exitstatus = EXIT_FAILURE;
1041
924
goto fallback;
1042
925
}
1043
926
1044
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1045
-Wconversion */
927
FD_SET(new_plugin->fd, &rfds_all);
1046
928
1047
929
if(maxfd < new_plugin->fd){
1048
930
maxfd = new_plugin->fd;
1049
931
}
1050
932
}
1051
933
1052
TEMP_FAILURE_RETRY(closedir(dir));
934
closedir(dir);
1053
935
dir = NULL;
1054
936
free_plugin(getplugin(NULL));
1055
937
1068
950
while(plugin_list){
1069
951
fd_set rfds = rfds_all;
1070
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1071
if(select_ret == -1 and errno != EINTR){
953
if(select_ret == -1){
1072
954
perror("select");
1073
exitstatus = EX_OSERR;
955
exitstatus = EXIT_FAILURE;
1074
956
goto fallback;
1075
957
}
1076
958
/* OK, now either a process completed, or something can be read
1091
973
WEXITSTATUS(proc->status));
1092
974
} else if(WIFSIGNALED(proc->status)){
1093
975
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1094
" signal %d: %s\n", proc->name,
976
" signal %d\n", proc->name,
1095
977
(intmax_t) (proc->pid),
1096
WTERMSIG(proc->status),
1097
strsignal(WTERMSIG(proc->status)));
978
WTERMSIG(proc->status));
1098
979
} else if(WCOREDUMP(proc->status)){
1099
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1100
981
" core\n", proc->name, (intmax_t) (proc->pid));
1102
983
}
1103
984
1104
985
/* Remove the plugin */
1105
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1106
-Wconversion */
986
FD_CLR(proc->fd, &rfds_all);
1107
987
1108
988
/* Block signal while modifying process_list */
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1110
(SIG_BLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1113
990
if(ret < 0){
1114
991
perror("sigprocmask");
1115
exitstatus = EX_OSERR;
992
exitstatus = EXIT_FAILURE;
1116
993
goto fallback;
1117
994
}
1118
995
1121
998
proc = next_plugin;
1122
999
1123
1000
/* We are done modifying process list, so unblock signal */
1124
ret = (int)(TEMP_FAILURE_RETRY
1125
(sigprocmask(SIG_UNBLOCK,
1126
&sigchld_action.sa_mask, NULL)));
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1127
1003
if(ret < 0){
1128
1004
perror("sigprocmask");
1129
exitstatus = EX_OSERR;
1005
exitstatus = EXIT_FAILURE;
1130
1006
goto fallback;
1131
1007
}
1132
1008
1143
1019
proc->buffer_length);
1144
1020
if(not bret){
1145
1021
perror("print_out_password");
1146
exitstatus = EX_IOERR;
1022
exitstatus = EXIT_FAILURE;
1147
1023
}
1148
1024
goto fallback;
1149
1025
}
1150
1026
1151
1027
/* This process has not completed. Does it have any output? */
1152
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1153
warning from
1154
-Wconversion */
1028
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1155
1029
/* This process had nothing to say at this time */
1156
1030
proc = proc->next;
1157
1031
continue;
1162
1036
+ (size_t) BUFFER_SIZE);
1163
1037
if(proc->buffer == NULL){
1164
1038
perror("malloc");
1165
exitstatus = EX_OSERR;
1039
exitstatus = EXIT_FAILURE;
1166
1040
goto fallback;
1167
1041
}
1168
1042
proc->buffer_size += BUFFER_SIZE;
1169
1043
}
1170
1044
/* Read from the process */
1171
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1172
proc->buffer
1173
+ proc->buffer_length,
1174
BUFFER_SIZE));
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1175
1047
if(sret < 0){
1176
1048
/* Read error from this process; ignore the error */
1177
1049
proc = proc->next;
1189
1061
1190
1062
fallback:
1191
1063
1192
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1193
and exitstatus != EX_OK)){
1064
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1194
1065
/* Fallback if all plugins failed, none are found or an error
1195
1066
occured */
1196
1067
bool bret;
1205
1076
bret = print_out_password(passwordbuffer, len);
1206
1077
if(not bret){
1207
1078
perror("print_out_password");
1208
exitstatus = EX_IOERR;
1079
exitstatus = EXIT_FAILURE;
1209
1080
}
1210
1081
}
1211
1082
1213
1084
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1214
1085
if(ret == -1){
1215
1086
perror("sigaction");
1216
exitstatus = EX_OSERR;
1087
exitstatus = EXIT_FAILURE;
1217
1088
}
1218
1089
1219
1090
if(custom_argv != NULL){
1240
1111
}
1241
1112
1242
1113
/* Wait for any remaining child processes to terminate */
1243
do {
1114
do{
1244
1115
ret = wait(NULL);
1245
1116
} while(ret >= 0);
1246
1117
if(errno != ECHILD){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0