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- Committer: Teddy Hogeborn
- Date: 2014-03-23 20:48:58 UTC
- Revision ID: teddy@recompile.se-20140323204858-l1x3aiick21oog4y
Improve error message when working around Debian bug #633582.
* plugins-runner.c (main): Improve error message when failing to work
around Debian bug #633582. Also simplify
code to always use execve().
* plugins-runner.c (main): Improve error message when failing to work
around Debian bug #633582. Also simplify
code to always use execve().
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
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
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
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
#include <stdio.h> /* perror, fileno(), fprintf(),
31
#include <stdio.h> /* 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(),
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() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
42
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
45
46
readdir(), closedir(), dirfd() */
46
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
48
fcntl(), setuid(), setgid(),
48
49
F_GETFD, F_SETFD, FD_CLOEXEC,
49
50
access(), pipe(), fork(), close()
50
51
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
execve(), write(), read(),
52
53
close() */
53
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
55
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
62
64
#include <signal.h> /* struct sigaction, sigemptyset(),
63
65
sigaddset(), sigaction(),
64
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
66
69
#include <errno.h> /* errno, EBADF */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
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() */
68
75
69
76
#define BUFFER_SIZE 256
70
77
72
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
73
80
74
81
const char *argp_program_version = "plugin-runner " VERSION;
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
98
105
99
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
101
109
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
110
/* Check for existing plugin with that name */
103
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
104
112
if((p->name == name)
105
113
or (p->name and name and (strcmp(p->name, name) == 0))){
107
115
}
108
116
}
109
117
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
111
122
if(new_plugin == NULL){
112
123
return NULL;
113
124
}
114
125
char *copy_name = NULL;
115
126
if(name != NULL){
116
copy_name = strdup(name);
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
117
130
if(copy_name == NULL){
131
int e = errno;
118
132
free(new_plugin);
133
errno = e;
119
134
return NULL;
120
135
}
121
136
}
125
140
.disabled = false,
126
141
.next = plugin_list };
127
142
128
new_plugin->argv = malloc(sizeof(char *) * 2);
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
129
146
if(new_plugin->argv == NULL){
147
int e = errno;
130
148
free(copy_name);
131
149
free(new_plugin);
150
errno = e;
132
151
return NULL;
133
152
}
134
153
new_plugin->argv[0] = copy_name;
135
154
new_plugin->argv[1] = NULL;
136
155
137
new_plugin->environ = malloc(sizeof(char *));
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
138
159
if(new_plugin->environ == NULL){
160
int e = errno;
139
161
free(copy_name);
140
162
free(new_plugin->argv);
141
163
free(new_plugin);
164
errno = e;
142
165
return NULL;
143
166
}
144
167
new_plugin->environ[0] = NULL;
149
172
}
150
173
151
174
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
152
176
static bool add_to_char_array(const char *new, char ***array,
153
177
int *len){
154
178
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
157
184
/* Malloc check */
158
if(*array == NULL){
185
if(new_array == NULL){
159
186
return false;
160
187
}
188
*array = new_array;
161
189
/* Make a copy of the new string */
162
char *copy = strdup(new);
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
163
194
if(copy == NULL){
164
195
return false;
165
196
}
172
203
}
173
204
174
205
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
175
207
static bool add_argument(plugin *p, const char *arg){
176
208
if(p == NULL){
177
209
return false;
180
212
}
181
213
182
214
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
183
216
static bool add_environment(plugin *p, const char *def, bool replace){
184
217
if(p == NULL){
185
218
return false;
187
220
/* namelen = length of name of environment variable */
188
221
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
222
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
192
225
/* It already exists */
193
226
if(replace){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
196
232
return false;
197
233
}
198
*e = new;
199
strcpy(*e, def);
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
200
236
}
201
237
return true;
202
238
}
207
243
/*
208
244
* Based on the example in the GNU LibC manual chapter 13.13 "File
209
245
* Descriptor Flags".
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
247
*/
248
__attribute__((warn_unused_result))
212
249
static int set_cloexec_flag(int fd){
213
int ret = fcntl(fd, F_GETFD, 0);
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
251
/* If reading the flags failed, return error indication now. */
215
252
if(ret < 0){
216
253
return ret;
217
254
}
218
255
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
220
258
}
221
259
222
260
237
275
/* No child processes */
238
276
break;
239
277
}
240
perror("waitpid");
278
error(0, errno, "waitpid");
241
279
}
242
280
243
281
/* A child exited, find it in process_list */
255
293
}
256
294
257
295
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
258
297
static bool print_out_password(const char *buffer, size_t length){
259
298
ssize_t ret;
260
299
for(size_t written = 0; written < length; written += (size_t)ret){
268
307
}
269
308
270
309
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
271
311
static void free_plugin(plugin *plugin_node){
272
312
273
313
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
279
319
}
280
320
free(plugin_node->environ);
281
321
free(plugin_node->buffer);
282
322
283
323
/* Removes the plugin from the singly-linked list */
284
324
if(plugin_node == plugin_list){
285
325
/* First one - simple */
312
352
struct dirent *dirst;
313
353
struct stat st;
314
354
fd_set rfds_all;
315
int ret, numchars, maxfd = 0;
355
int ret, maxfd = 0;
316
356
ssize_t sret;
317
intmax_t tmpmax;
318
357
uid_t uid = 65534;
319
358
gid_t gid = 65534;
320
359
bool debug = false;
329
368
sigemptyset(&sigchld_action.sa_mask);
330
369
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
331
370
if(ret == -1){
332
perror("sigaddset");
333
exitstatus = EXIT_FAILURE;
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
334
373
goto fallback;
335
374
}
336
375
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
337
376
if(ret == -1){
338
perror("sigaction");
339
exitstatus = EXIT_FAILURE;
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
340
379
goto fallback;
341
380
}
342
381
374
413
.doc = "Group ID the plugins will run as", .group = 3 },
375
414
{ .name = "debug", .key = 132,
376
415
.doc = "Debug mode", .group = 4 },
416
/*
417
* These reproduce what we would get without ARGP_NO_HELP
418
*/
419
{ .name = "help", .key = '?',
420
.doc = "Give this help list", .group = -1 },
421
{ .name = "usage", .key = -3,
422
.doc = "Give a short usage message", .group = -1 },
423
{ .name = "version", .key = 'V',
424
.doc = "Print program version", .group = -1 },
377
425
{ .name = NULL }
378
426
};
379
427
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
430
errno = 0;
382
431
switch(key){
432
char *tmp;
433
intmax_t tmp_id;
383
434
case 'g': /* --global-options */
384
if(arg != NULL){
385
char *p;
386
while((p = strsep(&arg, ",")) != NULL){
387
if(p[0] == '\0'){
388
continue;
389
}
390
if(not add_argument(getplugin(NULL), p)){
391
perror("add_argument");
392
return ARGP_ERR_UNKNOWN;
435
{
436
char *plugin_option;
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
439
break;
393
440
}
394
441
}
442
errno = 0;
395
443
}
396
444
break;
397
445
case 'G': /* --global-env */
398
if(arg == NULL){
399
break;
400
}
401
if(not add_environment(getplugin(NULL), arg, true)){
402
perror("add_environment");
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
403
448
}
404
449
break;
405
450
case 'o': /* --options-for */
406
if(arg != NULL){
407
char *p_name = strsep(&arg, ":");
408
if(p_name[0] == '\0' or arg == NULL){
409
break;
410
}
411
char *opt = strsep(&arg, ":");
412
if(opt[0] == '\0' or opt == NULL){
413
break;
414
}
415
char *p;
416
while((p = strsep(&opt, ",")) != NULL){
417
if(p[0] == '\0'){
418
continue;
419
}
420
if(not add_argument(getplugin(p_name), p)){
421
perror("add_argument");
422
return ARGP_ERR_UNKNOWN;
423
}
424
}
451
{
452
char *option_list = strchr(arg, ':');
453
if(option_list == NULL){
454
argp_error(state, "No colon in \"%s\"", arg);
455
errno = EINVAL;
456
break;
457
}
458
*option_list = '\0';
459
option_list++;
460
if(arg[0] == '\0'){
461
argp_error(state, "Empty plugin name");
462
errno = EINVAL;
463
break;
464
}
465
char *option;
466
while((option = strsep(&option_list, ",")) != NULL){
467
if(not add_argument(getplugin(arg), option)){
468
break;
469
}
470
}
471
errno = 0;
425
472
}
426
473
break;
427
474
case 'E': /* --env-for */
428
if(arg == NULL){
429
break;
430
}
431
475
{
432
476
char *envdef = strchr(arg, ':');
433
477
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
434
480
break;
435
481
}
436
482
*envdef = '\0';
437
if(not add_environment(getplugin(arg), envdef+1, true)){
438
perror("add_environment");
483
envdef++;
484
if(arg[0] == '\0'){
485
argp_error(state, "Empty plugin name");
486
errno = EINVAL;
487
break;
488
}
489
if(add_environment(getplugin(arg), envdef, true)){
490
errno = 0;
439
491
}
440
492
}
441
493
break;
442
494
case 'd': /* --disable */
443
if(arg != NULL){
495
{
444
496
plugin *p = getplugin(arg);
445
if(p == NULL){
446
return ARGP_ERR_UNKNOWN;
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
447
500
}
448
p->disabled = true;
449
501
}
450
502
break;
451
503
case 'e': /* --enable */
452
if(arg != NULL){
504
{
453
505
plugin *p = getplugin(arg);
454
if(p == NULL){
455
return ARGP_ERR_UNKNOWN;
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
456
509
}
457
p->disabled = false;
458
510
}
459
511
break;
460
512
case 128: /* --plugin-dir */
461
513
free(plugindir);
462
514
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
515
if(plugindir != NULL){
516
errno = 0;
517
}
466
518
break;
467
519
case 129: /* --config-file */
468
520
/* This is already done by parse_opt_config_file() */
469
521
break;
470
522
case 130: /* --userid */
471
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
472
if(ret < 1 or tmpmax != (uid_t)tmpmax
473
or arg[numchars] != '\0'){
474
fprintf(stderr, "Bad user ID number: \"%s\", using %"
475
PRIdMAX "\n", arg, (intmax_t)uid);
476
} else {
477
uid = (uid_t)tmpmax;
523
tmp_id = strtoimax(arg, &tmp, 10);
524
if(errno != 0 or tmp == arg or *tmp != '\0'
525
or tmp_id != (uid_t)tmp_id){
526
argp_error(state, "Bad user ID number: \"%s\", using %"
527
PRIdMAX, arg, (intmax_t)uid);
528
break;
478
529
}
530
uid = (uid_t)tmp_id;
531
errno = 0;
479
532
break;
480
533
case 131: /* --groupid */
481
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
482
if(ret < 1 or tmpmax != (gid_t)tmpmax
483
or arg[numchars] != '\0'){
484
fprintf(stderr, "Bad group ID number: \"%s\", using %"
485
PRIdMAX "\n", arg, (intmax_t)gid);
486
} else {
487
gid = (gid_t)tmpmax;
534
tmp_id = strtoimax(arg, &tmp, 10);
535
if(errno != 0 or tmp == arg or *tmp != '\0'
536
or tmp_id != (gid_t)tmp_id){
537
argp_error(state, "Bad group ID number: \"%s\", using %"
538
PRIdMAX, arg, (intmax_t)gid);
539
break;
488
540
}
541
gid = (gid_t)tmp_id;
542
errno = 0;
489
543
break;
490
544
case 132: /* --debug */
491
545
debug = true;
492
546
break;
547
/*
548
* These reproduce what we would get without ARGP_NO_HELP
549
*/
550
case '?': /* --help */
551
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
552
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
553
case -3: /* --usage */
554
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
555
argp_state_help(state, state->out_stream,
556
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
557
case 'V': /* --version */
558
fprintf(state->out_stream, "%s\n", argp_program_version);
559
exit(EXIT_SUCCESS);
560
break;
493
561
/*
494
562
* When adding more options before this line, remember to also add a
495
563
* "case" to the "parse_opt_config_file" function below.
498
566
/* Cryptsetup always passes an argument, which is an empty
499
567
string if "none" was specified in /etc/crypttab. So if
500
568
argument was empty, we ignore it silently. */
501
if(arg[0] != '\0'){
502
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
569
if(arg[0] == '\0'){
570
break;
503
571
}
504
break;
505
case ARGP_KEY_END:
506
break;
507
572
default:
508
573
return ARGP_ERR_UNKNOWN;
509
574
}
510
return 0;
575
return errno; /* Set to 0 at start */
511
576
}
512
577
513
578
/* This option parser is the same as parse_opt() above, except it
515
580
error_t parse_opt_config_file(int key, char *arg,
516
581
__attribute__((unused))
517
582
struct argp_state *state){
583
errno = 0;
518
584
switch(key){
519
585
case 'g': /* --global-options */
520
586
case 'G': /* --global-env */
527
593
case 129: /* --config-file */
528
594
free(argfile);
529
595
argfile = strdup(arg);
530
if(argfile == NULL){
531
perror("strdup");
596
if(argfile != NULL){
597
errno = 0;
532
598
}
533
break;
599
break;
534
600
case 130: /* --userid */
535
601
case 131: /* --groupid */
536
602
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
537
606
case ARGP_KEY_ARG:
538
case ARGP_KEY_END:
539
607
break;
540
608
default:
541
609
return ARGP_ERR_UNKNOWN;
542
610
}
543
return 0;
611
return errno;
544
612
}
545
613
546
614
struct argp argp = { .options = options,
550
618
551
619
/* Parse using parse_opt_config_file() in order to get the custom
552
620
config file location, if any. */
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
555
fprintf(stderr, "Unknown error while parsing arguments\n");
556
exitstatus = EXIT_FAILURE;
621
ret = argp_parse(&argp, argc, argv,
622
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
623
NULL, NULL);
624
switch(ret){
625
case 0:
626
break;
627
case ENOMEM:
628
default:
629
errno = ret;
630
error(0, errno, "argp_parse");
631
exitstatus = EX_OSERR;
632
goto fallback;
633
case EINVAL:
634
exitstatus = EX_USAGE;
557
635
goto fallback;
558
636
}
559
637
565
643
conffp = fopen(AFILE, "r");
566
644
} else {
567
645
conffp = fopen(argfile, "r");
568
}
646
}
569
647
if(conffp != NULL){
570
648
char *org_line = NULL;
571
649
char *p, *arg, *new_arg, *line;
572
650
size_t size = 0;
573
651
const char whitespace_delims[] = " \r\t\f\v\n";
574
652
const char comment_delim[] = "#";
575
653
576
654
custom_argc = 1;
577
655
custom_argv = malloc(sizeof(char*) * 2);
578
656
if(custom_argv == NULL){
579
perror("malloc");
580
exitstatus = EXIT_FAILURE;
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
581
659
goto fallback;
582
660
}
583
661
custom_argv[0] = argv[0];
584
662
custom_argv[1] = NULL;
585
663
586
664
/* for each line in the config file, strip whitespace and ignore
587
665
commented text */
588
666
while(true){
590
668
if(sret == -1){
591
669
break;
592
670
}
593
671
594
672
line = org_line;
595
673
arg = strsep(&line, comment_delim);
596
674
while((p = strsep(&arg, whitespace_delims)) != NULL){
599
677
}
600
678
new_arg = strdup(p);
601
679
if(new_arg == NULL){
602
perror("strdup");
603
exitstatus = EXIT_FAILURE;
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
604
682
free(org_line);
605
683
goto fallback;
606
684
}
607
685
608
686
custom_argc += 1;
609
custom_argv = realloc(custom_argv, sizeof(char *)
610
* ((unsigned int) custom_argc + 1));
611
if(custom_argv == NULL){
612
perror("realloc");
613
exitstatus = EXIT_FAILURE;
614
free(org_line);
615
goto fallback;
687
{
688
char **new_argv = realloc(custom_argv, sizeof(char *)
689
* ((unsigned int)
690
custom_argc + 1));
691
if(new_argv == NULL){
692
error(0, errno, "realloc");
693
exitstatus = EX_OSERR;
694
free(new_arg);
695
free(org_line);
696
goto fallback;
697
} else {
698
custom_argv = new_argv;
699
}
616
700
}
617
701
custom_argv[custom_argc-1] = new_arg;
618
custom_argv[custom_argc] = NULL;
702
custom_argv[custom_argc] = NULL;
619
703
}
620
704
}
705
do {
706
ret = fclose(conffp);
707
} while(ret == EOF and errno == EINTR);
708
if(ret == EOF){
709
error(0, errno, "fclose");
710
exitstatus = EX_IOERR;
711
goto fallback;
712
}
621
713
free(org_line);
622
714
} else {
623
715
/* Check for harmful errors and go to fallback. Other errors might
624
716
not affect opening plugins */
625
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
626
perror("fopen");
627
exitstatus = EXIT_FAILURE;
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
628
720
goto fallback;
629
721
}
630
722
}
631
/* If there was any arguments from configuration file,
632
pass them to parser as command arguments */
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
633
725
if(custom_argv != NULL){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
635
0, NULL);
636
if(ret == ARGP_ERR_UNKNOWN){
637
fprintf(stderr, "Unknown error while parsing arguments\n");
638
exitstatus = EXIT_FAILURE;
726
ret = argp_parse(&argp, custom_argc, custom_argv,
727
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
728
NULL, NULL);
729
switch(ret){
730
case 0:
731
break;
732
case ENOMEM:
733
default:
734
errno = ret;
735
error(0, errno, "argp_parse");
736
exitstatus = EX_OSERR;
737
goto fallback;
738
case EINVAL:
739
exitstatus = EX_CONFIG;
639
740
goto fallback;
640
741
}
641
742
}
642
743
643
744
/* Parse actual command line arguments, to let them override the
644
745
config file */
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
647
fprintf(stderr, "Unknown error while parsing arguments\n");
648
exitstatus = EXIT_FAILURE;
746
ret = argp_parse(&argp, argc, argv,
747
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
748
NULL, NULL);
749
switch(ret){
750
case 0:
751
break;
752
case ENOMEM:
753
default:
754
errno = ret;
755
error(0, errno, "argp_parse");
756
exitstatus = EX_OSERR;
757
goto fallback;
758
case EINVAL:
759
exitstatus = EX_USAGE;
649
760
goto fallback;
650
761
}
651
762
663
774
}
664
775
}
665
776
666
/* Strip permissions down to nobody */
667
setgid(gid);
777
if(getuid() == 0){
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open(\"" PDIR "\")");
783
} else {
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
785
if(ret == -1){
786
error(0, errno, "fstat");
787
} else {
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
790
if(ret == -1){
791
error(0, errno, "fchown");
792
}
793
}
794
}
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
796
}
797
}
798
799
/* Lower permissions */
800
ret = setgid(gid);
668
801
if(ret == -1){
669
perror("setgid");
802
error(0, errno, "setgid");
670
803
}
671
804
ret = setuid(uid);
672
805
if(ret == -1){
673
perror("setuid");
674
}
675
676
if(plugindir == NULL){
677
dir = opendir(PDIR);
678
} else {
679
dir = opendir(plugindir);
680
}
681
682
if(dir == NULL){
683
perror("Could not open plugin dir");
684
exitstatus = EXIT_FAILURE;
685
goto fallback;
686
}
687
688
/* Set the FD_CLOEXEC flag on the directory, if possible */
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
689
810
{
690
int dir_fd = dirfd(dir);
691
if(dir_fd >= 0){
692
ret = set_cloexec_flag(dir_fd);
693
if(ret < 0){
694
perror("set_cloexec_flag");
695
exitstatus = EXIT_FAILURE;
696
goto fallback;
697
}
811
int dir_fd = -1;
812
if(plugindir == NULL){
813
dir_fd = open(PDIR, O_RDONLY |
814
#ifdef O_CLOEXEC
815
O_CLOEXEC
816
#else /* not O_CLOEXEC */
817
0
818
#endif /* not O_CLOEXEC */
819
);
820
} else {
821
dir_fd = open(plugindir, O_RDONLY |
822
#ifdef O_CLOEXEC
823
O_CLOEXEC
824
#else /* not O_CLOEXEC */
825
0
826
#endif /* not O_CLOEXEC */
827
);
828
}
829
if(dir_fd == -1){
830
error(0, errno, "Could not open plugin dir");
831
exitstatus = EX_UNAVAILABLE;
832
goto fallback;
833
}
834
835
#ifndef O_CLOEXEC
836
/* Set the FD_CLOEXEC flag on the directory */
837
ret = set_cloexec_flag(dir_fd);
838
if(ret < 0){
839
error(0, errno, "set_cloexec_flag");
840
TEMP_FAILURE_RETRY(close(dir_fd));
841
exitstatus = EX_OSERR;
842
goto fallback;
843
}
844
#endif /* O_CLOEXEC */
845
846
dir = fdopendir(dir_fd);
847
if(dir == NULL){
848
error(0, errno, "Could not open plugin dir");
849
TEMP_FAILURE_RETRY(close(dir_fd));
850
exitstatus = EX_OSERR;
851
goto fallback;
698
852
}
699
853
}
700
854
702
856
703
857
/* Read and execute any executable in the plugin directory*/
704
858
while(true){
705
dirst = readdir(dir);
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
706
862
707
863
/* All directory entries have been processed */
708
864
if(dirst == NULL){
709
865
if(errno == EBADF){
710
perror("readdir");
711
exitstatus = EXIT_FAILURE;
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
712
868
goto fallback;
713
869
}
714
870
break;
720
876
{
721
877
bool bad_name = false;
722
878
723
const char const *bad_prefixes[] = { ".", "#", NULL };
879
const char * const bad_prefixes[] = { ".", "#", NULL };
724
880
725
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
726
882
".dpkg-old",
727
883
".dpkg-bak",
728
884
".dpkg-divert", NULL };
729
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
885
#ifdef __GNUC__
886
#pragma GCC diagnostic push
887
#pragma GCC diagnostic ignored "-Wcast-qual"
888
#endif
889
for(const char **pre = (const char **)bad_prefixes;
890
*pre != NULL; pre++){
891
#ifdef __GNUC__
892
#pragma GCC diagnostic pop
893
#endif
730
894
size_t pre_len = strlen(*pre);
731
895
if((d_name_len >= pre_len)
732
896
and strncmp((dirst->d_name), *pre, pre_len) == 0){
741
905
if(bad_name){
742
906
continue;
743
907
}
744
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
908
#ifdef __GNUC__
909
#pragma GCC diagnostic push
910
#pragma GCC diagnostic ignored "-Wcast-qual"
911
#endif
912
for(const char **suf = (const char **)bad_suffixes;
913
*suf != NULL; suf++){
914
#ifdef __GNUC__
915
#pragma GCC diagnostic pop
916
#endif
745
917
size_t suf_len = strlen(*suf);
746
918
if((d_name_len >= suf_len)
747
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
748
920
== 0)){
749
921
if(debug){
750
922
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
759
931
continue;
760
932
}
761
933
}
762
934
763
935
char *filename;
764
936
if(plugindir == NULL){
765
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
766
939
} else {
767
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
768
943
}
769
944
if(ret < 0){
770
perror("asprintf");
945
error(0, errno, "asprintf");
771
946
continue;
772
947
}
773
948
774
ret = stat(filename, &st);
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
775
950
if(ret == -1){
776
perror("stat");
951
error(0, errno, "stat");
777
952
free(filename);
778
953
continue;
779
954
}
780
955
781
956
/* Ignore non-executable files */
782
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
783
959
if(debug){
784
960
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
785
961
" with bad type or mode\n", filename);
790
966
791
967
plugin *p = getplugin(dirst->d_name);
792
968
if(p == NULL){
793
perror("getplugin");
969
error(0, errno, "getplugin");
794
970
free(filename);
795
971
continue;
796
972
}
808
984
if(g != NULL){
809
985
for(char **a = g->argv + 1; *a != NULL; a++){
810
986
if(not add_argument(p, *a)){
811
perror("add_argument");
987
error(0, errno, "add_argument");
812
988
}
813
989
}
814
990
/* Add global environment variables */
815
991
for(char **e = g->environ; *e != NULL; e++){
816
992
if(not add_environment(p, *e, false)){
817
perror("add_environment");
993
error(0, errno, "add_environment");
818
994
}
819
995
}
820
996
}
825
1001
if(p->environ[0] != NULL){
826
1002
for(char **e = environ; *e != NULL; e++){
827
1003
if(not add_environment(p, *e, false)){
828
perror("add_environment");
1004
error(0, errno, "add_environment");
829
1005
}
830
1006
}
831
1007
}
832
1008
833
1009
int pipefd[2];
834
ret = pipe(pipefd);
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
835
1011
if(ret == -1){
836
perror("pipe");
837
exitstatus = EXIT_FAILURE;
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
838
1014
goto fallback;
839
1015
}
840
1016
/* Ask OS to automatic close the pipe on exec */
841
1017
ret = set_cloexec_flag(pipefd[0]);
842
1018
if(ret < 0){
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
845
1021
goto fallback;
846
1022
}
847
1023
ret = set_cloexec_flag(pipefd[1]);
848
1024
if(ret < 0){
849
perror("set_cloexec_flag");
850
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
851
1027
goto fallback;
852
1028
}
853
1029
/* Block SIGCHLD until process is safely in process list */
854
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
1032
NULL));
855
1033
if(ret < 0){
856
perror("sigprocmask");
857
exitstatus = EXIT_FAILURE;
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
858
1036
goto fallback;
859
1037
}
860
1038
/* Starting a new process to be watched */
861
pid_t pid = fork();
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
862
1043
if(pid == -1){
863
perror("fork");
864
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
865
1046
goto fallback;
866
1047
}
867
1048
if(pid == 0){
868
1049
/* this is the child process */
869
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
870
1051
if(ret < 0){
871
perror("sigaction");
872
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
873
1054
}
874
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
875
1056
if(ret < 0){
876
perror("sigprocmask");
877
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
878
1059
}
879
1060
880
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
881
1062
if(ret == -1){
882
perror("dup2");
883
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
884
1065
}
885
1066
886
1067
if(dirfd(dir) < 0){
888
1069
above and must now close it manually here. */
889
1070
closedir(dir);
890
1071
}
891
if(p->environ[0] == NULL){
892
if(execv(filename, p->argv) < 0){
893
perror("execv");
894
_exit(EXIT_FAILURE);
895
}
896
} else {
897
if(execve(filename, p->argv, p->environ) < 0){
898
perror("execve");
899
_exit(EXIT_FAILURE);
900
}
1072
if(execve(filename, p->argv,
1073
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1074
error(0, errno, "execve for %s", filename);
1075
_exit(EX_OSERR);
901
1076
}
902
1077
/* no return */
903
1078
}
904
1079
/* Parent process */
905
close(pipefd[1]); /* Close unused write end of pipe */
1080
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1081
pipe */
906
1082
free(filename);
907
1083
plugin *new_plugin = getplugin(dirst->d_name);
908
1084
if(new_plugin == NULL){
909
perror("getplugin");
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
error(0, errno, "getplugin");
1086
ret = (int)(TEMP_FAILURE_RETRY
1087
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1088
NULL)));
911
1089
if(ret < 0){
912
perror("sigprocmask");
1090
error(0, errno, "sigprocmask");
913
1091
}
914
exitstatus = EXIT_FAILURE;
1092
exitstatus = EX_OSERR;
915
1093
goto fallback;
916
1094
}
917
1095
920
1098
921
1099
/* Unblock SIGCHLD so signal handler can be run if this process
922
1100
has already completed */
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1101
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1102
&sigchld_action.sa_mask,
1103
NULL));
924
1104
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1105
error(0, errno, "sigprocmask");
1106
exitstatus = EX_OSERR;
927
1107
goto fallback;
928
1108
}
929
1109
930
FD_SET(new_plugin->fd, &rfds_all);
1110
#if defined (__GNUC__) and defined (__GLIBC__)
1111
#if not __GLIBC_PREREQ(2, 16)
1112
#pragma GCC diagnostic push
1113
#pragma GCC diagnostic ignored "-Wsign-conversion"
1114
#endif
1115
#endif
1116
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1117
-Wconversion in GNU libc
1118
before 2.16 */
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic pop
1122
#endif
1123
#endif
931
1124
932
1125
if(maxfd < new_plugin->fd){
933
1126
maxfd = new_plugin->fd;
934
1127
}
935
1128
}
936
1129
937
closedir(dir);
1130
TEMP_FAILURE_RETRY(closedir(dir));
938
1131
dir = NULL;
1132
free_plugin(getplugin(NULL));
939
1133
940
1134
for(plugin *p = plugin_list; p != NULL; p = p->next){
941
1135
if(p->pid != 0){
952
1146
while(plugin_list){
953
1147
fd_set rfds = rfds_all;
954
1148
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1149
if(select_ret == -1 and errno != EINTR){
1150
error(0, errno, "select");
1151
exitstatus = EX_OSERR;
958
1152
goto fallback;
959
1153
}
960
1154
/* OK, now either a process completed, or something can be read
966
1160
if(not WIFEXITED(proc->status)
967
1161
or WEXITSTATUS(proc->status) != 0){
968
1162
/* Bad exit by plugin */
969
1163
970
1164
if(debug){
971
1165
if(WIFEXITED(proc->status)){
972
1166
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
975
1169
WEXITSTATUS(proc->status));
976
1170
} else if(WIFSIGNALED(proc->status)){
977
1171
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
978
" signal %d\n", proc->name,
1172
" signal %d: %s\n", proc->name,
979
1173
(intmax_t) (proc->pid),
980
WTERMSIG(proc->status));
1174
WTERMSIG(proc->status),
1175
strsignal(WTERMSIG(proc->status)));
981
1176
} else if(WCOREDUMP(proc->status)){
982
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
983
1178
" core\n", proc->name, (intmax_t) (proc->pid));
985
1180
}
986
1181
987
1182
/* Remove the plugin */
988
FD_CLR(proc->fd, &rfds_all);
989
1183
#if defined (__GNUC__) and defined (__GLIBC__)
1184
#if not __GLIBC_PREREQ(2, 16)
1185
#pragma GCC diagnostic push
1186
#pragma GCC diagnostic ignored "-Wsign-conversion"
1187
#endif
1188
#endif
1189
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1190
-Wconversion in GNU libc
1191
before 2.16 */
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic pop
1195
#endif
1196
#endif
1197
990
1198
/* Block signal while modifying process_list */
991
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1199
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1200
(SIG_BLOCK,
1201
&sigchld_action.sa_mask,
1202
NULL));
992
1203
if(ret < 0){
993
perror("sigprocmask");
994
exitstatus = EXIT_FAILURE;
1204
error(0, errno, "sigprocmask");
1205
exitstatus = EX_OSERR;
995
1206
goto fallback;
996
1207
}
997
1208
1000
1211
proc = next_plugin;
1001
1212
1002
1213
/* We are done modifying process list, so unblock signal */
1003
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1004
NULL);
1214
ret = (int)(TEMP_FAILURE_RETRY
1215
(sigprocmask(SIG_UNBLOCK,
1216
&sigchld_action.sa_mask, NULL)));
1005
1217
if(ret < 0){
1006
perror("sigprocmask");
1007
exitstatus = EXIT_FAILURE;
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
1008
1220
goto fallback;
1009
1221
}
1010
1222
1020
1232
bool bret = print_out_password(proc->buffer,
1021
1233
proc->buffer_length);
1022
1234
if(not bret){
1023
perror("print_out_password");
1024
exitstatus = EXIT_FAILURE;
1235
error(0, errno, "print_out_password");
1236
exitstatus = EX_IOERR;
1025
1237
}
1026
1238
goto fallback;
1027
1239
}
1028
1240
1029
1241
/* This process has not completed. Does it have any output? */
1030
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic push
1245
#pragma GCC diagnostic ignored "-Wsign-conversion"
1246
#endif
1247
#endif
1248
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1249
warning from
1250
-Wconversion
1251
in GNU libc
1252
before
1253
2.16 */
1254
#if defined (__GNUC__) and defined (__GLIBC__)
1255
#if not __GLIBC_PREREQ(2, 16)
1256
#pragma GCC diagnostic pop
1257
#endif
1258
#endif
1031
1259
/* This process had nothing to say at this time */
1032
1260
proc = proc->next;
1033
1261
continue;
1034
1262
}
1035
1263
/* Before reading, make the process' data buffer large enough */
1036
1264
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1037
proc->buffer = realloc(proc->buffer, proc->buffer_size
1038
+ (size_t) BUFFER_SIZE);
1039
if(proc->buffer == NULL){
1040
perror("malloc");
1041
exitstatus = EXIT_FAILURE;
1265
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1266
+ (size_t) BUFFER_SIZE);
1267
if(new_buffer == NULL){
1268
error(0, errno, "malloc");
1269
exitstatus = EX_OSERR;
1042
1270
goto fallback;
1043
1271
}
1272
proc->buffer = new_buffer;
1044
1273
proc->buffer_size += BUFFER_SIZE;
1045
1274
}
1046
1275
/* Read from the process */
1047
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1048
BUFFER_SIZE);
1276
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1277
proc->buffer
1278
+ proc->buffer_length,
1279
BUFFER_SIZE));
1049
1280
if(sret < 0){
1050
1281
/* Read error from this process; ignore the error */
1051
1282
proc = proc->next;
1059
1290
}
1060
1291
}
1061
1292
}
1062
1063
1293
1294
1064
1295
fallback:
1065
1296
1066
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1297
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1298
and exitstatus != EX_OK)){
1067
1299
/* Fallback if all plugins failed, none are found or an error
1068
1300
occured */
1069
1301
bool bret;
1077
1309
}
1078
1310
bret = print_out_password(passwordbuffer, len);
1079
1311
if(not bret){
1080
perror("print_out_password");
1081
exitstatus = EXIT_FAILURE;
1312
error(0, errno, "print_out_password");
1313
exitstatus = EX_IOERR;
1082
1314
}
1083
1315
}
1084
1316
1085
1317
/* Restore old signal handler */
1086
1318
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1087
1319
if(ret == -1){
1088
perror("sigaction");
1089
exitstatus = EXIT_FAILURE;
1320
error(0, errno, "sigaction");
1321
exitstatus = EX_OSERR;
1090
1322
}
1091
1323
1092
1324
if(custom_argv != NULL){
1107
1339
ret = kill(p->pid, SIGTERM);
1108
1340
if(ret == -1 and errno != ESRCH){
1109
1341
/* Set-uid proccesses might not get closed */
1110
perror("kill");
1342
error(0, errno, "kill");
1111
1343
}
1112
1344
}
1113
1345
}
1114
1346
1115
1347
/* Wait for any remaining child processes to terminate */
1116
do{
1348
do {
1117
1349
ret = wait(NULL);
1118
1350
} while(ret >= 0);
1119
1351
if(errno != ECHILD){
1120
perror("wait");
1352
error(0, errno, "wait");
1121
1353
}
1122
1354
1123
1355
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0