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- Committer: Teddy Hogeborn
- Date: 2009-09-04 16:32:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20090904163222-l9wp25ng1e5ym0yq
* plugin-runner.c (main): When a plugin is killed by a signal, show
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
- 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(),
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
71
74
72
#define BUFFER_SIZE 256
75
73
104
102
/* Gets an existing plugin based on name,
105
103
or if none is found, creates a new one */
106
104
static plugin *getplugin(char *name){
107
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
108
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
109
107
if((p->name == name)
110
108
or (p->name and name and (strcmp(p->name, name) == 0))){
112
110
}
113
111
}
114
112
/* 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);
113
plugin *new_plugin = malloc(sizeof(plugin));
119
114
if(new_plugin == NULL){
120
115
return NULL;
121
116
}
122
117
char *copy_name = NULL;
123
118
if(name != NULL){
124
do {
125
copy_name = strdup(name);
126
} while(copy_name == NULL and errno == EINTR);
119
copy_name = strdup(name);
127
120
if(copy_name == NULL){
128
int e = errno;
129
121
free(new_plugin);
130
errno = e;
131
122
return NULL;
132
123
}
133
124
}
137
128
.disabled = false,
138
129
.next = plugin_list };
139
130
140
do {
141
new_plugin->argv = malloc(sizeof(char *) * 2);
142
} while(new_plugin->argv == NULL and errno == EINTR);
131
new_plugin->argv = malloc(sizeof(char *) * 2);
143
132
if(new_plugin->argv == NULL){
144
int e = errno;
145
133
free(copy_name);
146
134
free(new_plugin);
147
errno = e;
148
135
return NULL;
149
136
}
150
137
new_plugin->argv[0] = copy_name;
151
138
new_plugin->argv[1] = NULL;
152
139
153
do {
154
new_plugin->environ = malloc(sizeof(char *));
155
} while(new_plugin->environ == NULL and errno == EINTR);
140
new_plugin->environ = malloc(sizeof(char *));
156
141
if(new_plugin->environ == NULL){
157
int e = errno;
158
142
free(copy_name);
159
143
free(new_plugin->argv);
160
144
free(new_plugin);
161
errno = e;
162
145
return NULL;
163
146
}
164
147
new_plugin->environ[0] = NULL;
172
155
static bool add_to_char_array(const char *new, char ***array,
173
156
int *len){
174
157
/* 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);
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
179
160
/* Malloc check */
180
161
if(*array == NULL){
181
162
return false;
182
163
}
183
164
/* Make a copy of the new string */
184
char *copy;
185
do {
186
copy = strdup(new);
187
} while(copy == NULL and errno == EINTR);
165
char *copy = strdup(new);
188
166
if(copy == NULL){
189
167
return false;
190
168
}
216
194
if(strncmp(*e, def, namelen + 1) == 0){
217
195
/* It already exists */
218
196
if(replace){
219
char *new;
220
do {
221
new = realloc(*e, strlen(def) + 1);
222
} while(new == NULL and errno == EINTR);
197
char *new = realloc(*e, strlen(def) + 1);
223
198
if(new == NULL){
224
199
return false;
225
200
}
235
210
/*
236
211
* Based on the example in the GNU LibC manual chapter 13.13 "File
237
212
* Descriptor Flags".
238
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
239
214
*/
240
215
static int set_cloexec_flag(int fd){
241
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
216
int ret = fcntl(fd, F_GETFD, 0);
242
217
/* If reading the flags failed, return error indication now. */
243
218
if(ret < 0){
244
219
return ret;
245
220
}
246
221
/* Store modified flag word in the descriptor. */
247
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
248
ret | FD_CLOEXEC));
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
223
}
250
224
251
225
343
317
fd_set rfds_all;
344
318
int ret, maxfd = 0;
345
319
ssize_t sret;
320
intmax_t tmpmax;
346
321
uid_t uid = 65534;
347
322
gid_t gid = 65534;
348
323
bool debug = false;
358
333
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
359
334
if(ret == -1){
360
335
perror("sigaddset");
361
exitstatus = EX_OSERR;
336
exitstatus = EXIT_FAILURE;
362
337
goto fallback;
363
338
}
364
339
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
365
340
if(ret == -1){
366
341
perror("sigaction");
367
exitstatus = EX_OSERR;
342
exitstatus = EXIT_FAILURE;
368
343
goto fallback;
369
344
}
370
345
402
377
.doc = "Group ID the plugins will run as", .group = 3 },
403
378
{ .name = "debug", .key = 132,
404
379
.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
380
{ .name = NULL }
415
381
};
416
382
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
418
errno = 0;
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
419
386
switch(key){
420
char *tmp;
421
intmax_t tmpmax;
422
387
case 'g': /* --global-options */
423
{
388
if(arg != NULL){
424
389
char *plugin_option;
425
390
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
426
394
if(not add_argument(getplugin(NULL), plugin_option)){
427
break;
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
428
397
}
429
398
}
430
399
}
431
400
break;
432
401
case 'G': /* --global-env */
433
add_environment(getplugin(NULL), arg, true);
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
407
}
434
408
break;
435
409
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;
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
454
420
}
455
421
}
456
422
}
457
423
break;
458
424
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
459
428
{
460
429
char *envdef = strchr(arg, ':');
461
430
if(envdef == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
431
break;
465
432
}
466
433
*envdef = '\0';
467
envdef++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
472
436
}
473
add_environment(getplugin(arg), envdef, true);
474
437
}
475
438
break;
476
439
case 'd': /* --disable */
477
{
440
if(arg != NULL){
478
441
plugin *p = getplugin(arg);
479
if(p != NULL){
480
p->disabled = true;
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
481
444
}
445
p->disabled = true;
482
446
}
483
447
break;
484
448
case 'e': /* --enable */
485
{
449
if(arg != NULL){
486
450
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = false;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
489
453
}
454
p->disabled = false;
490
455
}
491
456
break;
492
457
case 128: /* --plugin-dir */
493
458
free(plugindir);
494
459
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
462
}
495
463
break;
496
464
case 129: /* --config-file */
497
465
/* This is already done by parse_opt_config_file() */
498
466
break;
499
467
case 130: /* --userid */
468
errno = 0;
500
469
tmpmax = strtoimax(arg, &tmp, 10);
501
470
if(errno != 0 or tmp == arg or *tmp != '\0'
502
471
or tmpmax != (uid_t)tmpmax){
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
505
break;
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
506
476
}
507
uid = (uid_t)tmpmax;
508
477
break;
509
478
case 131: /* --groupid */
479
errno = 0;
510
480
tmpmax = strtoimax(arg, &tmp, 10);
511
481
if(errno != 0 or tmp == arg or *tmp != '\0'
512
482
or tmpmax != (gid_t)tmpmax){
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
515
break;
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
516
487
}
517
gid = (gid_t)tmpmax;
518
488
break;
519
489
case 132: /* --debug */
520
490
debug = true;
521
491
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
492
/*
537
493
* When adding more options before this line, remember to also add a
538
494
* "case" to the "parse_opt_config_file" function below.
541
497
/* Cryptsetup always passes an argument, which is an empty
542
498
string if "none" was specified in /etc/crypttab. So if
543
499
argument was empty, we ignore it silently. */
544
if(arg[0] == '\0'){
545
break;
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
546
502
}
503
break;
504
case ARGP_KEY_END:
505
break;
547
506
default:
548
507
return ARGP_ERR_UNKNOWN;
549
508
}
550
return errno; /* Set to 0 at start */
509
return 0;
551
510
}
552
511
553
512
/* This option parser is the same as parse_opt() above, except it
555
514
error_t parse_opt_config_file(int key, char *arg,
556
515
__attribute__((unused))
557
516
struct argp_state *state){
558
errno = 0;
559
517
switch(key){
560
518
case 'g': /* --global-options */
561
519
case 'G': /* --global-env */
568
526
case 129: /* --config-file */
569
527
free(argfile);
570
528
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
531
}
571
532
break;
572
533
case 130: /* --userid */
573
534
case 131: /* --groupid */
574
535
case 132: /* --debug */
575
case '?': /* --help */
576
case -3: /* --usage */
577
case 'V': /* --version */
578
536
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
579
538
break;
580
539
default:
581
540
return ARGP_ERR_UNKNOWN;
582
541
}
583
return errno;
542
return 0;
584
543
}
585
544
586
545
struct argp argp = { .options = options,
590
549
591
550
/* Parse using parse_opt_config_file() in order to get the custom
592
551
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;
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
607
556
goto fallback;
608
557
}
609
558
627
576
custom_argv = malloc(sizeof(char*) * 2);
628
577
if(custom_argv == NULL){
629
578
perror("malloc");
630
exitstatus = EX_OSERR;
579
exitstatus = EXIT_FAILURE;
631
580
goto fallback;
632
581
}
633
582
custom_argv[0] = argv[0];
650
599
new_arg = strdup(p);
651
600
if(new_arg == NULL){
652
601
perror("strdup");
653
exitstatus = EX_OSERR;
602
exitstatus = EXIT_FAILURE;
654
603
free(org_line);
655
604
goto fallback;
656
605
}
660
609
* ((unsigned int) custom_argc + 1));
661
610
if(custom_argv == NULL){
662
611
perror("realloc");
663
exitstatus = EX_OSERR;
612
exitstatus = EXIT_FAILURE;
664
613
free(org_line);
665
614
goto fallback;
666
615
}
668
617
custom_argv[custom_argc] = NULL;
669
618
}
670
619
}
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
620
free(org_line);
680
621
} else {
681
622
/* Check for harmful errors and go to fallback. Other errors might
682
623
not affect opening plugins */
683
624
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
684
625
perror("fopen");
685
exitstatus = EX_OSERR;
626
exitstatus = EXIT_FAILURE;
686
627
goto fallback;
687
628
}
688
629
}
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
691
632
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;
633
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
0, NULL);
635
if(ret == ARGP_ERR_UNKNOWN){
636
fprintf(stderr, "Unknown error while parsing arguments\n");
637
exitstatus = EXIT_FAILURE;
706
638
goto fallback;
707
639
}
708
640
}
709
641
710
642
/* Parse actual command line arguments, to let them override the
711
643
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;
644
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
645
if(ret == ARGP_ERR_UNKNOWN){
646
fprintf(stderr, "Unknown error while parsing arguments\n");
647
exitstatus = EXIT_FAILURE;
726
648
goto fallback;
727
649
}
728
650
750
672
perror("setuid");
751
673
}
752
674
753
/* Open plugin directory with close_on_exec flag */
675
if(plugindir == NULL){
676
dir = opendir(PDIR);
677
} else {
678
dir = opendir(plugindir);
679
}
680
681
if(dir == NULL){
682
perror("Could not open plugin dir");
683
exitstatus = EXIT_FAILURE;
684
goto fallback;
685
}
686
687
/* Set the FD_CLOEXEC flag on the directory, if possible */
754
688
{
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;
689
int dir_fd = dirfd(dir);
690
if(dir_fd >= 0){
691
ret = set_cloexec_flag(dir_fd);
692
if(ret < 0){
693
perror("set_cloexec_flag");
694
exitstatus = EXIT_FAILURE;
695
goto fallback;
696
}
796
697
}
797
698
}
798
699
800
701
801
702
/* Read and execute any executable in the plugin directory*/
802
703
while(true){
803
do {
804
dirst = readdir(dir);
805
} while(dirst == NULL and errno == EINTR);
704
dirst = readdir(dir);
806
705
807
706
/* All directory entries have been processed */
808
707
if(dirst == NULL){
809
708
if(errno == EBADF){
810
709
perror("readdir");
811
exitstatus = EX_IOERR;
710
exitstatus = EXIT_FAILURE;
812
711
goto fallback;
813
712
}
814
713
break;
844
743
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
845
744
size_t suf_len = strlen(*suf);
846
745
if((d_name_len >= suf_len)
847
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
746
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
848
747
== 0)){
849
748
if(debug){
850
749
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
862
761
863
762
char *filename;
864
763
if(plugindir == NULL){
865
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
866
dirst->d_name));
764
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
867
765
} else {
868
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
869
plugindir,
870
dirst->d_name));
766
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
871
767
}
872
768
if(ret < 0){
873
769
perror("asprintf");
874
770
continue;
875
771
}
876
772
877
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
773
ret = stat(filename, &st);
878
774
if(ret == -1){
879
775
perror("stat");
880
776
free(filename);
882
778
}
883
779
884
780
/* Ignore non-executable files */
885
if(not S_ISREG(st.st_mode)
886
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
887
782
if(debug){
888
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
784
" with bad type or mode\n", filename);
935
830
}
936
831
937
832
int pipefd[2];
938
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
833
ret = pipe(pipefd);
939
834
if(ret == -1){
940
835
perror("pipe");
941
exitstatus = EX_OSERR;
836
exitstatus = EXIT_FAILURE;
942
837
goto fallback;
943
838
}
944
839
/* Ask OS to automatic close the pipe on exec */
945
840
ret = set_cloexec_flag(pipefd[0]);
946
841
if(ret < 0){
947
842
perror("set_cloexec_flag");
948
exitstatus = EX_OSERR;
843
exitstatus = EXIT_FAILURE;
949
844
goto fallback;
950
845
}
951
846
ret = set_cloexec_flag(pipefd[1]);
952
847
if(ret < 0){
953
848
perror("set_cloexec_flag");
954
exitstatus = EX_OSERR;
849
exitstatus = EXIT_FAILURE;
955
850
goto fallback;
956
851
}
957
852
/* 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));
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
961
854
if(ret < 0){
962
855
perror("sigprocmask");
963
exitstatus = EX_OSERR;
856
exitstatus = EXIT_FAILURE;
964
857
goto fallback;
965
858
}
966
859
/* Starting a new process to be watched */
967
pid_t pid;
968
do {
969
pid = fork();
970
} while(pid == -1 and errno == EINTR);
860
pid_t pid = fork();
971
861
if(pid == -1){
972
862
perror("fork");
973
exitstatus = EX_OSERR;
863
exitstatus = EXIT_FAILURE;
974
864
goto fallback;
975
865
}
976
866
if(pid == 0){
978
868
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
979
869
if(ret < 0){
980
870
perror("sigaction");
981
_exit(EX_OSERR);
871
_exit(EXIT_FAILURE);
982
872
}
983
873
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
984
874
if(ret < 0){
985
875
perror("sigprocmask");
986
_exit(EX_OSERR);
876
_exit(EXIT_FAILURE);
987
877
}
988
878
989
879
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
990
880
if(ret == -1){
991
881
perror("dup2");
992
_exit(EX_OSERR);
882
_exit(EXIT_FAILURE);
993
883
}
994
884
995
885
if(dirfd(dir) < 0){
1000
890
if(p->environ[0] == NULL){
1001
891
if(execv(filename, p->argv) < 0){
1002
892
perror("execv");
1003
_exit(EX_OSERR);
893
_exit(EXIT_FAILURE);
1004
894
}
1005
895
} else {
1006
896
if(execve(filename, p->argv, p->environ) < 0){
1007
897
perror("execve");
1008
_exit(EX_OSERR);
898
_exit(EXIT_FAILURE);
1009
899
}
1010
900
}
1011
901
/* no return */
1012
902
}
1013
903
/* Parent process */
1014
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1015
pipe */
904
close(pipefd[1]); /* Close unused write end of pipe */
1016
905
free(filename);
1017
906
plugin *new_plugin = getplugin(dirst->d_name);
1018
907
if(new_plugin == NULL){
1019
908
perror("getplugin");
1020
ret = (int)(TEMP_FAILURE_RETRY
1021
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1022
NULL)));
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1023
910
if(ret < 0){
1024
911
perror("sigprocmask");
1025
912
}
1026
exitstatus = EX_OSERR;
913
exitstatus = EXIT_FAILURE;
1027
914
goto fallback;
1028
915
}
1029
916
1032
919
1033
920
/* Unblock SIGCHLD so signal handler can be run if this process
1034
921
has already completed */
1035
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1036
&sigchld_action.sa_mask,
1037
NULL));
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
923
if(ret < 0){
1039
924
perror("sigprocmask");
1040
exitstatus = EX_OSERR;
925
exitstatus = EXIT_FAILURE;
1041
926
goto fallback;
1042
927
}
1043
928
1044
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1045
-Wconversion */
929
FD_SET(new_plugin->fd, &rfds_all);
1046
930
1047
931
if(maxfd < new_plugin->fd){
1048
932
maxfd = new_plugin->fd;
1049
933
}
1050
934
}
1051
935
1052
TEMP_FAILURE_RETRY(closedir(dir));
936
closedir(dir);
1053
937
dir = NULL;
1054
938
free_plugin(getplugin(NULL));
1055
939
1068
952
while(plugin_list){
1069
953
fd_set rfds = rfds_all;
1070
954
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1071
if(select_ret == -1 and errno != EINTR){
955
if(select_ret == -1){
1072
956
perror("select");
1073
exitstatus = EX_OSERR;
957
exitstatus = EXIT_FAILURE;
1074
958
goto fallback;
1075
959
}
1076
960
/* OK, now either a process completed, or something can be read
1102
986
}
1103
987
1104
988
/* Remove the plugin */
1105
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1106
-Wconversion */
989
FD_CLR(proc->fd, &rfds_all);
1107
990
1108
991
/* Block signal while modifying process_list */
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1110
(SIG_BLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1113
993
if(ret < 0){
1114
994
perror("sigprocmask");
1115
exitstatus = EX_OSERR;
995
exitstatus = EXIT_FAILURE;
1116
996
goto fallback;
1117
997
}
1118
998
1121
1001
proc = next_plugin;
1122
1002
1123
1003
/* 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)));
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1127
1006
if(ret < 0){
1128
1007
perror("sigprocmask");
1129
exitstatus = EX_OSERR;
1008
exitstatus = EXIT_FAILURE;
1130
1009
goto fallback;
1131
1010
}
1132
1011
1143
1022
proc->buffer_length);
1144
1023
if(not bret){
1145
1024
perror("print_out_password");
1146
exitstatus = EX_IOERR;
1025
exitstatus = EXIT_FAILURE;
1147
1026
}
1148
1027
goto fallback;
1149
1028
}
1150
1029
1151
1030
/* 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 */
1031
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1155
1032
/* This process had nothing to say at this time */
1156
1033
proc = proc->next;
1157
1034
continue;
1162
1039
+ (size_t) BUFFER_SIZE);
1163
1040
if(proc->buffer == NULL){
1164
1041
perror("malloc");
1165
exitstatus = EX_OSERR;
1042
exitstatus = EXIT_FAILURE;
1166
1043
goto fallback;
1167
1044
}
1168
1045
proc->buffer_size += BUFFER_SIZE;
1169
1046
}
1170
1047
/* Read from the process */
1171
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1172
proc->buffer
1173
+ proc->buffer_length,
1174
BUFFER_SIZE));
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1175
1050
if(sret < 0){
1176
1051
/* Read error from this process; ignore the error */
1177
1052
proc = proc->next;
1189
1064
1190
1065
fallback:
1191
1066
1192
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1193
and exitstatus != EX_OK)){
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1194
1068
/* Fallback if all plugins failed, none are found or an error
1195
1069
occured */
1196
1070
bool bret;
1205
1079
bret = print_out_password(passwordbuffer, len);
1206
1080
if(not bret){
1207
1081
perror("print_out_password");
1208
exitstatus = EX_IOERR;
1082
exitstatus = EXIT_FAILURE;
1209
1083
}
1210
1084
}
1211
1085
1213
1087
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1214
1088
if(ret == -1){
1215
1089
perror("sigaction");
1216
exitstatus = EX_OSERR;
1090
exitstatus = EXIT_FAILURE;
1217
1091
}
1218
1092
1219
1093
if(custom_argv != NULL){
1240
1114
}
1241
1115
1242
1116
/* Wait for any remaining child processes to terminate */
1243
do {
1117
do{
1244
1118
ret = wait(NULL);
1245
1119
} while(ret >= 0);
1246
1120
if(errno != ECHILD){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0