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- Committer: teddy at bsnet
- Date: 2010-09-02 19:07:20 UTC
- mto: (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100902190720-sp0pitu30isx4pvi
* mandos (ClientDBus.approvals_pending): Bug fix: Only send D-Bus
signals if connected to the
D-Bus.
signals if connected to the
D-Bus.
- files added:
- dbus-mandos.conf
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
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() */
26
asprintf(), O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
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, opendir(), stat(), struct
33
#include <sys/types.h> /* DIR, fdopendir(), 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, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
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() */
57
strsignal(), strcmp(), strncmp() */
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 */
71
73
72
74
#define BUFFER_SIZE 256
73
75
102
104
/* Gets an existing plugin based on name,
103
105
or if none is found, creates a new one */
104
106
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
107
/* Check for existing plugin with that name */
106
108
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
109
if((p->name == name)
108
110
or (p->name and name and (strcmp(p->name, name) == 0))){
110
112
}
111
113
}
112
114
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
115
plugin *new_plugin = NULL;
116
do {
117
new_plugin = malloc(sizeof(plugin));
118
} while(new_plugin == NULL and errno == EINTR);
114
119
if(new_plugin == NULL){
115
120
return NULL;
116
121
}
117
122
char *copy_name = NULL;
118
123
if(name != NULL){
119
copy_name = strdup(name);
124
do {
125
copy_name = strdup(name);
126
} while(copy_name == NULL and errno == EINTR);
120
127
if(copy_name == NULL){
128
int e = errno;
121
129
free(new_plugin);
130
errno = e;
122
131
return NULL;
123
132
}
124
133
}
128
137
.disabled = false,
129
138
.next = plugin_list };
130
139
131
new_plugin->argv = malloc(sizeof(char *) * 2);
140
do {
141
new_plugin->argv = malloc(sizeof(char *) * 2);
142
} while(new_plugin->argv == NULL and errno == EINTR);
132
143
if(new_plugin->argv == NULL){
144
int e = errno;
133
145
free(copy_name);
134
146
free(new_plugin);
147
errno = e;
135
148
return NULL;
136
149
}
137
150
new_plugin->argv[0] = copy_name;
138
151
new_plugin->argv[1] = NULL;
139
152
140
new_plugin->environ = malloc(sizeof(char *));
153
do {
154
new_plugin->environ = malloc(sizeof(char *));
155
} while(new_plugin->environ == NULL and errno == EINTR);
141
156
if(new_plugin->environ == NULL){
157
int e = errno;
142
158
free(copy_name);
143
159
free(new_plugin->argv);
144
160
free(new_plugin);
161
errno = e;
145
162
return NULL;
146
163
}
147
164
new_plugin->environ[0] = NULL;
155
172
static bool add_to_char_array(const char *new, char ***array,
156
173
int *len){
157
174
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
175
do {
176
*array = realloc(*array, sizeof(char *)
177
* (size_t) ((*len) + 2));
178
} while(*array == NULL and errno == EINTR);
160
179
/* Malloc check */
161
180
if(*array == NULL){
162
181
return false;
163
182
}
164
183
/* Make a copy of the new string */
165
char *copy = strdup(new);
184
char *copy;
185
do {
186
copy = strdup(new);
187
} while(copy == NULL and errno == EINTR);
166
188
if(copy == NULL){
167
189
return false;
168
190
}
194
216
if(strncmp(*e, def, namelen + 1) == 0){
195
217
/* It already exists */
196
218
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
219
char *new;
220
do {
221
new = realloc(*e, strlen(def) + 1);
222
} while(new == NULL and errno == EINTR);
198
223
if(new == NULL){
199
224
return false;
200
225
}
210
235
/*
211
236
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
237
* Descriptor Flags".
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
238
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
239
*/
215
240
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
241
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
242
/* If reading the flags failed, return error indication now. */
218
243
if(ret < 0){
219
244
return ret;
220
245
}
221
246
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
247
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
248
ret | FD_CLOEXEC));
223
249
}
224
250
225
251
317
343
fd_set rfds_all;
318
344
int ret, maxfd = 0;
319
345
ssize_t sret;
320
intmax_t tmpmax;
321
346
uid_t uid = 65534;
322
347
gid_t gid = 65534;
323
348
bool debug = false;
333
358
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
359
if(ret == -1){
335
360
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
361
exitstatus = EX_OSERR;
337
362
goto fallback;
338
363
}
339
364
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
365
if(ret == -1){
341
366
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
367
exitstatus = EX_OSERR;
343
368
goto fallback;
344
369
}
345
370
377
402
.doc = "Group ID the plugins will run as", .group = 3 },
378
403
{ .name = "debug", .key = 132,
379
404
.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 },
380
414
{ .name = NULL }
381
415
};
382
416
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
418
errno = 0;
386
419
switch(key){
420
char *tmp;
421
intmax_t tmpmax;
387
422
case 'g': /* --global-options */
388
if(arg != NULL){
423
{
389
424
char *plugin_option;
390
425
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
426
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
427
break;
397
428
}
398
429
}
399
430
}
400
431
break;
401
432
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
407
}
433
add_environment(getplugin(NULL), arg, true);
408
434
break;
409
435
case 'o': /* --options-for */
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;
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;
420
454
}
421
455
}
422
456
}
423
457
break;
424
458
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
459
{
429
460
char *envdef = strchr(arg, ':');
430
461
if(envdef == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
431
464
break;
432
465
}
433
466
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
467
envdef++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
436
472
}
473
add_environment(getplugin(arg), envdef, true);
437
474
}
438
475
break;
439
476
case 'd': /* --disable */
440
if(arg != NULL){
477
{
441
478
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
479
if(p != NULL){
480
p->disabled = true;
444
481
}
445
p->disabled = true;
446
482
}
447
483
break;
448
484
case 'e': /* --enable */
449
if(arg != NULL){
485
{
450
486
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
487
if(p != NULL){
488
p->disabled = false;
453
489
}
454
p->disabled = false;
455
490
}
456
491
break;
457
492
case 128: /* --plugin-dir */
458
493
free(plugindir);
459
494
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
462
}
463
495
break;
464
496
case 129: /* --config-file */
465
497
/* This is already done by parse_opt_config_file() */
466
498
break;
467
499
case 130: /* --userid */
468
errno = 0;
469
500
tmpmax = strtoimax(arg, &tmp, 10);
470
501
if(errno != 0 or tmp == arg or *tmp != '\0'
471
502
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
505
break;
476
506
}
507
uid = (uid_t)tmpmax;
477
508
break;
478
509
case 131: /* --groupid */
479
errno = 0;
480
510
tmpmax = strtoimax(arg, &tmp, 10);
481
511
if(errno != 0 or tmp == arg or *tmp != '\0'
482
512
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
515
break;
487
516
}
517
gid = (gid_t)tmpmax;
488
518
break;
489
519
case 132: /* --debug */
490
520
debug = true;
491
521
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;
492
536
/*
493
537
* When adding more options before this line, remember to also add a
494
538
* "case" to the "parse_opt_config_file" function below.
497
541
/* Cryptsetup always passes an argument, which is an empty
498
542
string if "none" was specified in /etc/crypttab. So if
499
543
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
544
if(arg[0] == '\0'){
545
break;
502
546
}
503
break;
504
case ARGP_KEY_END:
505
break;
506
547
default:
507
548
return ARGP_ERR_UNKNOWN;
508
549
}
509
return 0;
550
return errno; /* Set to 0 at start */
510
551
}
511
552
512
553
/* This option parser is the same as parse_opt() above, except it
514
555
error_t parse_opt_config_file(int key, char *arg,
515
556
__attribute__((unused))
516
557
struct argp_state *state){
558
errno = 0;
517
559
switch(key){
518
560
case 'g': /* --global-options */
519
561
case 'G': /* --global-env */
526
568
case 129: /* --config-file */
527
569
free(argfile);
528
570
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
531
}
532
571
break;
533
572
case 130: /* --userid */
534
573
case 131: /* --groupid */
535
574
case 132: /* --debug */
575
case '?': /* --help */
576
case -3: /* --usage */
577
case 'V': /* --version */
536
578
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
579
break;
539
580
default:
540
581
return ARGP_ERR_UNKNOWN;
541
582
}
542
return 0;
583
return errno;
543
584
}
544
585
545
586
struct argp argp = { .options = options,
549
590
550
591
/* Parse using parse_opt_config_file() in order to get the custom
551
592
config file location, if any. */
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;
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;
556
607
goto fallback;
557
608
}
558
609
576
627
custom_argv = malloc(sizeof(char*) * 2);
577
628
if(custom_argv == NULL){
578
629
perror("malloc");
579
exitstatus = EXIT_FAILURE;
630
exitstatus = EX_OSERR;
580
631
goto fallback;
581
632
}
582
633
custom_argv[0] = argv[0];
599
650
new_arg = strdup(p);
600
651
if(new_arg == NULL){
601
652
perror("strdup");
602
exitstatus = EXIT_FAILURE;
653
exitstatus = EX_OSERR;
603
654
free(org_line);
604
655
goto fallback;
605
656
}
609
660
* ((unsigned int) custom_argc + 1));
610
661
if(custom_argv == NULL){
611
662
perror("realloc");
612
exitstatus = EXIT_FAILURE;
663
exitstatus = EX_OSERR;
613
664
free(org_line);
614
665
goto fallback;
615
666
}
617
668
custom_argv[custom_argc] = NULL;
618
669
}
619
670
}
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
}
620
679
free(org_line);
621
680
} else {
622
681
/* Check for harmful errors and go to fallback. Other errors might
623
682
not affect opening plugins */
624
683
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
684
perror("fopen");
626
exitstatus = EXIT_FAILURE;
685
exitstatus = EX_OSERR;
627
686
goto fallback;
628
687
}
629
688
}
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
632
691
if(custom_argv != NULL){
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;
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;
638
706
goto fallback;
639
707
}
640
708
}
641
709
642
710
/* Parse actual command line arguments, to let them override the
643
711
config file */
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;
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;
648
726
goto fallback;
649
727
}
650
728
672
750
perror("setuid");
673
751
}
674
752
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 */
753
/* Open plugin directory with close_on_exec flag */
688
754
{
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
}
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;
697
796
}
698
797
}
699
798
701
800
702
801
/* Read and execute any executable in the plugin directory*/
703
802
while(true){
704
dirst = readdir(dir);
803
do {
804
dirst = readdir(dir);
805
} while(dirst == NULL and errno == EINTR);
705
806
706
807
/* All directory entries have been processed */
707
808
if(dirst == NULL){
708
809
if(errno == EBADF){
709
810
perror("readdir");
710
exitstatus = EXIT_FAILURE;
811
exitstatus = EX_IOERR;
711
812
goto fallback;
712
813
}
713
814
break;
743
844
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
744
845
size_t suf_len = strlen(*suf);
745
846
if((d_name_len >= suf_len)
746
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
847
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
747
848
== 0)){
748
849
if(debug){
749
850
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
862
762
863
char *filename;
763
864
if(plugindir == NULL){
764
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
865
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
866
dirst->d_name));
765
867
} else {
766
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
868
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
869
plugindir,
870
dirst->d_name));
767
871
}
768
872
if(ret < 0){
769
873
perror("asprintf");
770
874
continue;
771
875
}
772
876
773
ret = stat(filename, &st);
877
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
774
878
if(ret == -1){
775
879
perror("stat");
776
880
free(filename);
778
882
}
779
883
780
884
/* Ignore non-executable files */
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
885
if(not S_ISREG(st.st_mode)
886
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
782
887
if(debug){
783
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
889
" with bad type or mode\n", filename);
830
935
}
831
936
832
937
int pipefd[2];
833
ret = pipe(pipefd);
938
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
834
939
if(ret == -1){
835
940
perror("pipe");
836
exitstatus = EXIT_FAILURE;
941
exitstatus = EX_OSERR;
837
942
goto fallback;
838
943
}
839
944
/* Ask OS to automatic close the pipe on exec */
840
945
ret = set_cloexec_flag(pipefd[0]);
841
946
if(ret < 0){
842
947
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
948
exitstatus = EX_OSERR;
844
949
goto fallback;
845
950
}
846
951
ret = set_cloexec_flag(pipefd[1]);
847
952
if(ret < 0){
848
953
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
954
exitstatus = EX_OSERR;
850
955
goto fallback;
851
956
}
852
957
/* Block SIGCHLD until process is safely in process list */
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
958
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
959
&sigchld_action.sa_mask,
960
NULL));
854
961
if(ret < 0){
855
962
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
963
exitstatus = EX_OSERR;
857
964
goto fallback;
858
965
}
859
966
/* Starting a new process to be watched */
860
pid_t pid = fork();
967
pid_t pid;
968
do {
969
pid = fork();
970
} while(pid == -1 and errno == EINTR);
861
971
if(pid == -1){
862
972
perror("fork");
863
exitstatus = EXIT_FAILURE;
973
exitstatus = EX_OSERR;
864
974
goto fallback;
865
975
}
866
976
if(pid == 0){
868
978
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
869
979
if(ret < 0){
870
980
perror("sigaction");
871
_exit(EXIT_FAILURE);
981
_exit(EX_OSERR);
872
982
}
873
983
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
984
if(ret < 0){
875
985
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
986
_exit(EX_OSERR);
877
987
}
878
988
879
989
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
880
990
if(ret == -1){
881
991
perror("dup2");
882
_exit(EXIT_FAILURE);
992
_exit(EX_OSERR);
883
993
}
884
994
885
995
if(dirfd(dir) < 0){
890
1000
if(p->environ[0] == NULL){
891
1001
if(execv(filename, p->argv) < 0){
892
1002
perror("execv");
893
_exit(EXIT_FAILURE);
1003
_exit(EX_OSERR);
894
1004
}
895
1005
} else {
896
1006
if(execve(filename, p->argv, p->environ) < 0){
897
1007
perror("execve");
898
_exit(EXIT_FAILURE);
1008
_exit(EX_OSERR);
899
1009
}
900
1010
}
901
1011
/* no return */
902
1012
}
903
1013
/* Parent process */
904
close(pipefd[1]); /* Close unused write end of pipe */
1014
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1015
pipe */
905
1016
free(filename);
906
1017
plugin *new_plugin = getplugin(dirst->d_name);
907
1018
if(new_plugin == NULL){
908
1019
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1020
ret = (int)(TEMP_FAILURE_RETRY
1021
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1022
NULL)));
910
1023
if(ret < 0){
911
1024
perror("sigprocmask");
912
1025
}
913
exitstatus = EXIT_FAILURE;
1026
exitstatus = EX_OSERR;
914
1027
goto fallback;
915
1028
}
916
1029
919
1032
920
1033
/* Unblock SIGCHLD so signal handler can be run if this process
921
1034
has already completed */
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1035
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1036
&sigchld_action.sa_mask,
1037
NULL));
923
1038
if(ret < 0){
924
1039
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1040
exitstatus = EX_OSERR;
926
1041
goto fallback;
927
1042
}
928
1043
929
FD_SET(new_plugin->fd, &rfds_all);
1044
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1045
-Wconversion */
930
1046
931
1047
if(maxfd < new_plugin->fd){
932
1048
maxfd = new_plugin->fd;
933
1049
}
934
1050
}
935
1051
936
closedir(dir);
1052
TEMP_FAILURE_RETRY(closedir(dir));
937
1053
dir = NULL;
938
1054
free_plugin(getplugin(NULL));
939
1055
952
1068
while(plugin_list){
953
1069
fd_set rfds = rfds_all;
954
1070
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
1071
if(select_ret == -1 and errno != EINTR){
956
1072
perror("select");
957
exitstatus = EXIT_FAILURE;
1073
exitstatus = EX_OSERR;
958
1074
goto fallback;
959
1075
}
960
1076
/* OK, now either a process completed, or something can be read
986
1102
}
987
1103
988
1104
/* Remove the plugin */
989
FD_CLR(proc->fd, &rfds_all);
1105
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1106
-Wconversion */
990
1107
991
1108
/* Block signal while modifying process_list */
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1110
(SIG_BLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
993
1113
if(ret < 0){
994
1114
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1115
exitstatus = EX_OSERR;
996
1116
goto fallback;
997
1117
}
998
1118
1001
1121
proc = next_plugin;
1002
1122
1003
1123
/* We are done modifying process list, so unblock signal */
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1124
ret = (int)(TEMP_FAILURE_RETRY
1125
(sigprocmask(SIG_UNBLOCK,
1126
&sigchld_action.sa_mask, NULL)));
1006
1127
if(ret < 0){
1007
1128
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1129
exitstatus = EX_OSERR;
1009
1130
goto fallback;
1010
1131
}
1011
1132
1022
1143
proc->buffer_length);
1023
1144
if(not bret){
1024
1145
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1146
exitstatus = EX_IOERR;
1026
1147
}
1027
1148
goto fallback;
1028
1149
}
1029
1150
1030
1151
/* This process has not completed. Does it have any output? */
1031
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1152
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1153
warning from
1154
-Wconversion */
1032
1155
/* This process had nothing to say at this time */
1033
1156
proc = proc->next;
1034
1157
continue;
1039
1162
+ (size_t) BUFFER_SIZE);
1040
1163
if(proc->buffer == NULL){
1041
1164
perror("malloc");
1042
exitstatus = EXIT_FAILURE;
1165
exitstatus = EX_OSERR;
1043
1166
goto fallback;
1044
1167
}
1045
1168
proc->buffer_size += BUFFER_SIZE;
1046
1169
}
1047
1170
/* Read from the process */
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1171
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1172
proc->buffer
1173
+ proc->buffer_length,
1174
BUFFER_SIZE));
1050
1175
if(sret < 0){
1051
1176
/* Read error from this process; ignore the error */
1052
1177
proc = proc->next;
1064
1189
1065
1190
fallback:
1066
1191
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1192
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1193
and exitstatus != EX_OK)){
1068
1194
/* Fallback if all plugins failed, none are found or an error
1069
1195
occured */
1070
1196
bool bret;
1079
1205
bret = print_out_password(passwordbuffer, len);
1080
1206
if(not bret){
1081
1207
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1208
exitstatus = EX_IOERR;
1083
1209
}
1084
1210
}
1085
1211
1087
1213
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1088
1214
if(ret == -1){
1089
1215
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1216
exitstatus = EX_OSERR;
1091
1217
}
1092
1218
1093
1219
if(custom_argv != NULL){
1114
1240
}
1115
1241
1116
1242
/* Wait for any remaining child processes to terminate */
1117
do{
1243
do {
1118
1244
ret = wait(NULL);
1119
1245
} while(ret >= 0);
1120
1246
if(errno != ECHILD){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0