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- Committer: Teddy Hogeborn
- Date: 2009-09-07 23:48:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20090907234817-op1lgg9gpruejsiv
* initramfs-tools-hook: Bug fix: Really install user-supplied plugins.
Bug fix: Warn about empty plugin directory.
Bug fix: Warn about empty plugin directory.
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf() */
28
27
#include <stddef.h> /* size_t, NULL */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
31
30
#include <stdbool.h> /* bool, true, false */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
67
68
*/
68
69
#include <errno.h> /* errno, EBADF */
69
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
71
76
72
#define BUFFER_SIZE 256
77
73
78
74
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
76
82
77
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
79
85
80
typedef struct plugin{
86
81
char *name; /* can be NULL or any plugin name */
106
101
107
102
/* Gets an existing plugin based on name,
108
103
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
104
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
112
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
107
if((p->name == name)
114
108
or (p->name and name and (strcmp(p->name, name) == 0))){
129
123
copy_name = strdup(name);
130
124
} while(copy_name == NULL and errno == EINTR);
131
125
if(copy_name == NULL){
132
int e = errno;
133
126
free(new_plugin);
134
errno = e;
135
127
return NULL;
136
128
}
137
129
}
145
137
new_plugin->argv = malloc(sizeof(char *) * 2);
146
138
} while(new_plugin->argv == NULL and errno == EINTR);
147
139
if(new_plugin->argv == NULL){
148
int e = errno;
149
140
free(copy_name);
150
141
free(new_plugin);
151
errno = e;
152
142
return NULL;
153
143
}
154
144
new_plugin->argv[0] = copy_name;
158
148
new_plugin->environ = malloc(sizeof(char *));
159
149
} while(new_plugin->environ == NULL and errno == EINTR);
160
150
if(new_plugin->environ == NULL){
161
int e = errno;
162
151
free(copy_name);
163
152
free(new_plugin->argv);
164
153
free(new_plugin);
165
errno = e;
166
154
return NULL;
167
155
}
168
156
new_plugin->environ[0] = NULL;
173
161
}
174
162
175
163
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
164
static bool add_to_char_array(const char *new, char ***array,
178
165
int *len){
179
166
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
167
do {
182
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
184
sizeof(char *));
185
#else
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
187
/* overflow */
188
new_array = NULL;
189
errno = ENOMEM;
190
} else {
191
new_array = realloc(*array, (size_t)((*len) + 2)
192
* sizeof(char *));
193
}
194
#endif
195
} while(new_array == NULL and errno == EINTR);
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
196
171
/* Malloc check */
197
if(new_array == NULL){
172
if(*array == NULL){
198
173
return false;
199
174
}
200
*array = new_array;
201
175
/* Make a copy of the new string */
202
176
char *copy;
203
177
do {
215
189
}
216
190
217
191
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
219
192
static bool add_argument(plugin *p, const char *arg){
220
193
if(p == NULL){
221
194
return false;
224
197
}
225
198
226
199
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
228
200
static bool add_environment(plugin *p, const char *def, bool replace){
229
201
if(p == NULL){
230
202
return false;
232
204
/* namelen = length of name of environment variable */
233
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
234
206
/* Search for this environment variable */
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
237
209
/* It already exists */
238
210
if(replace){
239
char *new_envdef;
211
char *new;
240
212
do {
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
244
216
return false;
245
217
}
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
248
220
}
249
221
return true;
250
222
}
252
224
return add_to_char_array(def, &(p->environ), &(p->envc));
253
225
}
254
226
255
#ifndef O_CLOEXEC
256
227
/*
257
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
258
229
* Descriptor Flags".
259
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
260
231
*/
261
__attribute__((warn_unused_result))
262
232
static int set_cloexec_flag(int fd){
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
264
234
/* If reading the flags failed, return error indication now. */
265
235
if(ret < 0){
266
236
return ret;
267
237
}
268
238
/* Store modified flag word in the descriptor. */
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
ret | FD_CLOEXEC));
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
271
240
}
272
#endif /* not O_CLOEXEC */
273
241
274
242
275
243
/* Mark processes as completed when they exit, and save their exit
289
257
/* No child processes */
290
258
break;
291
259
}
292
error(0, errno, "waitpid");
260
perror("waitpid");
293
261
}
294
262
295
263
/* A child exited, find it in process_list */
307
275
}
308
276
309
277
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
311
278
static bool print_out_password(const char *buffer, size_t length){
312
279
ssize_t ret;
313
280
for(size_t written = 0; written < length; written += (size_t)ret){
321
288
}
322
289
323
290
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
325
291
static void free_plugin(plugin *plugin_node){
326
292
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
328
294
free(*arg);
329
295
}
330
free(plugin_node->name);
331
296
free(plugin_node->argv);
332
297
for(char **env = plugin_node->environ; *env != NULL; env++){
333
298
free(*env);
360
325
361
326
int main(int argc, char *argv[]){
362
327
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
364
328
char *argfile = NULL;
365
329
FILE *conffp;
366
struct dirent **direntries = NULL;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
367
333
struct stat st;
368
334
fd_set rfds_all;
369
335
int ret, maxfd = 0;
377
343
.sa_flags = SA_NOCLDSTOP };
378
344
char **custom_argv = NULL;
379
345
int custom_argc = 0;
380
int dir_fd = -1;
381
346
382
347
/* Establish a signal handler */
383
348
sigemptyset(&sigchld_action.sa_mask);
384
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
385
350
if(ret == -1){
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
388
353
goto fallback;
389
354
}
390
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
391
356
if(ret == -1){
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
394
359
goto fallback;
395
360
}
396
361
428
393
.doc = "Group ID the plugins will run as", .group = 3 },
429
394
{ .name = "debug", .key = 132,
430
395
.doc = "Debug mode", .group = 4 },
431
{ .name = "plugin-helper-dir", .key = 133,
432
.arg = "DIRECTORY",
433
.doc = "Specify a different plugin helper directory",
434
.group = 2 },
435
/*
436
* These reproduce what we would get without ARGP_NO_HELP
437
*/
438
{ .name = "help", .key = '?',
439
.doc = "Give this help list", .group = -1 },
440
{ .name = "usage", .key = -3,
441
.doc = "Give a short usage message", .group = -1 },
442
{ .name = "version", .key = 'V',
443
.doc = "Print program version", .group = -1 },
444
396
{ .name = NULL }
445
397
};
446
398
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
450
401
switch(key){
451
402
char *tmp;
452
intmax_t tmp_id;
403
intmax_t tmpmax;
453
404
case 'g': /* --global-options */
454
{
405
if(arg != NULL){
455
406
char *plugin_option;
456
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
457
411
if(not add_argument(getplugin(NULL), plugin_option)){
458
break;
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
459
414
}
460
415
}
461
errno = 0;
462
416
}
463
417
break;
464
418
case 'G': /* --global-env */
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
467
424
}
468
425
break;
469
426
case 'o': /* --options-for */
470
{
471
char *option_list = strchr(arg, ':');
472
if(option_list == NULL){
473
argp_error(state, "No colon in \"%s\"", arg);
474
errno = EINVAL;
475
break;
476
}
477
*option_list = '\0';
478
option_list++;
479
if(arg[0] == '\0'){
480
argp_error(state, "Empty plugin name");
481
errno = EINVAL;
482
break;
483
}
484
char *option;
485
while((option = strsep(&option_list, ",")) != NULL){
486
if(not add_argument(getplugin(arg), option)){
487
break;
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
488
437
}
489
438
}
490
errno = 0;
491
439
}
492
440
break;
493
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
494
445
{
495
446
char *envdef = strchr(arg, ':');
496
447
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
499
448
break;
500
449
}
501
450
*envdef = '\0';
502
envdef++;
503
if(arg[0] == '\0'){
504
argp_error(state, "Empty plugin name");
505
errno = EINVAL;
506
break;
507
}
508
if(add_environment(getplugin(arg), envdef, true)){
509
errno = 0;
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
510
453
}
511
454
}
512
455
break;
513
456
case 'd': /* --disable */
514
{
457
if(arg != NULL){
515
458
plugin *p = getplugin(arg);
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
519
461
}
462
p->disabled = true;
520
463
}
521
464
break;
522
465
case 'e': /* --enable */
523
{
466
if(arg != NULL){
524
467
plugin *p = getplugin(arg);
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
528
470
}
471
p->disabled = false;
529
472
}
530
473
break;
531
474
case 128: /* --plugin-dir */
532
475
free(plugindir);
533
476
plugindir = strdup(arg);
534
if(plugindir != NULL){
535
errno = 0;
477
if(plugindir == NULL){
478
perror("strdup");
536
479
}
537
480
break;
538
481
case 129: /* --config-file */
539
482
/* This is already done by parse_opt_config_file() */
540
483
break;
541
484
case 130: /* --userid */
542
tmp_id = strtoimax(arg, &tmp, 10);
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
543
487
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (uid_t)tmp_id){
545
argp_error(state, "Bad user ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)uid);
547
break;
488
or tmpmax != (uid_t)tmpmax){
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
548
493
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
551
494
break;
552
495
case 131: /* --groupid */
553
tmp_id = strtoimax(arg, &tmp, 10);
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
554
498
if(errno != 0 or tmp == arg or *tmp != '\0'
555
or tmp_id != (gid_t)tmp_id){
556
argp_error(state, "Bad group ID number: \"%s\", using %"
557
PRIdMAX, arg, (intmax_t)gid);
558
break;
499
or tmpmax != (gid_t)tmpmax){
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
559
504
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
562
505
break;
563
506
case 132: /* --debug */
564
507
debug = true;
565
508
break;
566
case 133: /* --plugin-helper-dir */
567
free(pluginhelperdir);
568
pluginhelperdir = strdup(arg);
569
if(pluginhelperdir != NULL){
570
errno = 0;
571
}
572
break;
573
/*
574
* These reproduce what we would get without ARGP_NO_HELP
575
*/
576
case '?': /* --help */
577
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
case -3: /* --usage */
581
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
argp_state_help(state, state->out_stream,
583
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
case 'V': /* --version */
586
fprintf(state->out_stream, "%s\n", argp_program_version);
587
exit(EXIT_SUCCESS);
588
break;
589
509
/*
590
510
* When adding more options before this line, remember to also add a
591
511
* "case" to the "parse_opt_config_file" function below.
594
514
/* Cryptsetup always passes an argument, which is an empty
595
515
string if "none" was specified in /etc/crypttab. So if
596
516
argument was empty, we ignore it silently. */
597
if(arg[0] == '\0'){
598
break;
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
599
519
}
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
520
break;
521
case ARGP_KEY_END:
522
break;
605
523
default:
606
524
return ARGP_ERR_UNKNOWN;
607
525
}
608
return errno; /* Set to 0 at start */
526
return 0;
609
527
}
610
528
611
529
/* This option parser is the same as parse_opt() above, except it
613
531
error_t parse_opt_config_file(int key, char *arg,
614
532
__attribute__((unused))
615
533
struct argp_state *state){
616
errno = 0;
617
534
switch(key){
618
535
case 'g': /* --global-options */
619
536
case 'G': /* --global-env */
626
543
case 129: /* --config-file */
627
544
free(argfile);
628
545
argfile = strdup(arg);
629
if(argfile != NULL){
630
errno = 0;
546
if(argfile == NULL){
547
perror("strdup");
631
548
}
632
549
break;
633
550
case 130: /* --userid */
634
551
case 131: /* --groupid */
635
552
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
640
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
641
555
break;
642
556
default:
643
557
return ARGP_ERR_UNKNOWN;
644
558
}
645
return errno;
559
return 0;
646
560
}
647
561
648
562
struct argp argp = { .options = options,
652
566
653
567
/* Parse using parse_opt_config_file() in order to get the custom
654
568
config file location, if any. */
655
ret = argp_parse(&argp, argc, argv,
656
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
657
NULL, NULL);
658
switch(ret){
659
case 0:
660
break;
661
case ENOMEM:
662
default:
663
errno = ret;
664
error(0, errno, "argp_parse");
665
exitstatus = EX_OSERR;
666
goto fallback;
667
case EINVAL:
668
exitstatus = EX_USAGE;
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
571
fprintf(stderr, "Unknown error while parsing arguments\n");
572
exitstatus = EXIT_FAILURE;
669
573
goto fallback;
670
574
}
671
575
688
592
custom_argc = 1;
689
593
custom_argv = malloc(sizeof(char*) * 2);
690
594
if(custom_argv == NULL){
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
693
597
goto fallback;
694
598
}
695
599
custom_argv[0] = argv[0];
711
615
}
712
616
new_arg = strdup(p);
713
617
if(new_arg == NULL){
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
716
620
free(org_line);
717
621
goto fallback;
718
622
}
719
623
720
624
custom_argc += 1;
721
{
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
724
sizeof(char *));
725
#else
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
728
/* overflow */
729
errno = ENOMEM;
730
} else {
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
732
* sizeof(char *));
733
}
734
#endif
735
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
737
exitstatus = EX_OSERR;
738
free(new_arg);
739
free(org_line);
740
goto fallback;
741
} else {
742
custom_argv = new_argv;
743
}
625
custom_argv = realloc(custom_argv, sizeof(char *)
626
* ((unsigned int) custom_argc + 1));
627
if(custom_argv == NULL){
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
630
free(org_line);
631
goto fallback;
744
632
}
745
633
custom_argv[custom_argc-1] = new_arg;
746
634
custom_argv[custom_argc] = NULL;
750
638
ret = fclose(conffp);
751
639
} while(ret == EOF and errno == EINTR);
752
640
if(ret == EOF){
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
755
643
goto fallback;
756
644
}
757
645
free(org_line);
759
647
/* Check for harmful errors and go to fallback. Other errors might
760
648
not affect opening plugins */
761
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
764
652
goto fallback;
765
653
}
766
654
}
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
769
657
if(custom_argv != NULL){
770
ret = argp_parse(&argp, custom_argc, custom_argv,
771
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
772
NULL, NULL);
773
switch(ret){
774
case 0:
775
break;
776
case ENOMEM:
777
default:
778
errno = ret;
779
error(0, errno, "argp_parse");
780
exitstatus = EX_OSERR;
781
goto fallback;
782
case EINVAL:
783
exitstatus = EX_CONFIG;
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
661
fprintf(stderr, "Unknown error while parsing arguments\n");
662
exitstatus = EXIT_FAILURE;
784
663
goto fallback;
785
664
}
786
665
}
787
666
788
667
/* Parse actual command line arguments, to let them override the
789
668
config file */
790
ret = argp_parse(&argp, argc, argv,
791
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
792
NULL, NULL);
793
switch(ret){
794
case 0:
795
break;
796
case ENOMEM:
797
default:
798
errno = ret;
799
error(0, errno, "argp_parse");
800
exitstatus = EX_OSERR;
801
goto fallback;
802
case EINVAL:
803
exitstatus = EX_USAGE;
804
goto fallback;
805
}
806
807
{
808
char *pluginhelperenv;
809
bool bret = true;
810
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
811
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
812
if(ret != -1){
813
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
814
}
815
if(ret == -1 or not bret){
816
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
817
" environment variable to \"%s\" for all plugins\n",
818
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
819
}
820
if(ret != -1){
821
free(pluginhelperenv);
822
}
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
823
674
}
824
675
825
676
if(debug){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
827
678
fprintf(stderr, "Plugin: %s has %d arguments\n",
828
679
p->name ? p->name : "Global", p->argc - 1);
829
680
for(char **a = p->argv; *a != NULL; a++){
836
687
}
837
688
}
838
689
839
if(getuid() == 0){
840
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
842
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
if(plugindir_fd == -1){
844
if(errno != ENOENT){
845
error(0, errno, "open(\"" PDIR "\")");
846
}
847
} else {
848
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
849
if(ret == -1){
850
error(0, errno, "fstat");
851
} else {
852
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
853
ret = fchown(plugindir_fd, uid, gid);
854
if(ret == -1){
855
error(0, errno, "fchown");
856
}
857
}
858
}
859
close(plugindir_fd);
860
}
861
}
862
863
/* Lower permissions */
864
ret = setgid(gid);
690
/* Strip permissions down to nobody */
691
setgid(gid);
865
692
if(ret == -1){
866
error(0, errno, "setgid");
693
perror("setgid");
867
694
}
868
695
ret = setuid(uid);
869
696
if(ret == -1){
870
error(0, errno, "setuid");
871
}
872
873
/* Open plugin directory with close_on_exec flag */
697
perror("setuid");
698
}
699
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
704
}
705
706
if(dir == NULL){
707
perror("Could not open plugin dir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
874
713
{
875
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
876
#ifdef O_CLOEXEC
877
O_CLOEXEC
878
#else /* not O_CLOEXEC */
879
0
880
#endif /* not O_CLOEXEC */
881
);
882
if(dir_fd == -1){
883
error(0, errno, "Could not open plugin dir");
884
exitstatus = EX_UNAVAILABLE;
885
goto fallback;
886
}
887
888
#ifndef O_CLOEXEC
889
/* Set the FD_CLOEXEC flag on the directory */
890
ret = set_cloexec_flag(dir_fd);
891
if(ret < 0){
892
error(0, errno, "set_cloexec_flag");
893
exitstatus = EX_OSERR;
894
goto fallback;
895
}
896
#endif /* O_CLOEXEC */
897
}
898
899
int good_name(const struct dirent * const dirent){
900
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
901
"*.dpkg-old", "*.dpkg-bak",
902
"*.dpkg-divert", NULL };
903
#ifdef __GNUC__
904
#pragma GCC diagnostic push
905
#pragma GCC diagnostic ignored "-Wcast-qual"
906
#endif
907
for(const char **pat = (const char **)patterns;
908
*pat != NULL; pat++){
909
#ifdef __GNUC__
910
#pragma GCC diagnostic pop
911
#endif
912
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
913
!= FNM_NOMATCH){
914
if(debug){
915
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
916
" matching pattern %s\n", dirent->d_name, *pat);
917
}
918
return 0;
714
int dir_fd = dirfd(dir);
715
if(dir_fd >= 0){
716
ret = set_cloexec_flag(dir_fd);
717
if(ret < 0){
718
perror("set_cloexec_flag");
719
exitstatus = EXIT_FAILURE;
720
goto fallback;
919
721
}
920
722
}
921
return 1;
922
}
923
924
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
925
alphasort);
926
if(numplugins == -1){
927
error(0, errno, "Could not scan plugin dir");
928
direntries = NULL;
929
exitstatus = EX_OSERR;
930
goto fallback;
931
723
}
932
724
933
725
FD_ZERO(&rfds_all);
934
726
935
727
/* Read and execute any executable in the plugin directory*/
936
for(int i = 0; i < numplugins; i++){
937
938
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
939
if(plugin_fd == -1){
940
error(0, errno, "Could not open plugin");
941
free(direntries[i]);
728
while(true){
729
do {
730
dirst = readdir(dir);
731
} while(dirst == NULL and errno == EINTR);
732
733
/* All directory entries have been processed */
734
if(dirst == NULL){
735
if(errno == EBADF){
736
perror("readdir");
737
exitstatus = EXIT_FAILURE;
738
goto fallback;
739
}
740
break;
741
}
742
743
d_name_len = strlen(dirst->d_name);
744
745
/* Ignore dotfiles, backup files and other junk */
746
{
747
bool bad_name = false;
748
749
const char const *bad_prefixes[] = { ".", "#", NULL };
750
751
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
752
".dpkg-old",
753
".dpkg-bak",
754
".dpkg-divert", NULL };
755
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
756
size_t pre_len = strlen(*pre);
757
if((d_name_len >= pre_len)
758
and strncmp((dirst->d_name), *pre, pre_len) == 0){
759
if(debug){
760
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
" with bad prefix %s\n", dirst->d_name, *pre);
762
}
763
bad_name = true;
764
break;
765
}
766
}
767
if(bad_name){
768
continue;
769
}
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
771
size_t suf_len = strlen(*suf);
772
if((d_name_len >= suf_len)
773
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
774
== 0)){
775
if(debug){
776
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
777
" with bad suffix %s\n", dirst->d_name, *suf);
778
}
779
bad_name = true;
780
break;
781
}
782
}
783
784
if(bad_name){
785
continue;
786
}
787
}
788
789
char *filename;
790
if(plugindir == NULL){
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
793
} else {
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
796
}
797
if(ret < 0){
798
perror("asprintf");
942
799
continue;
943
800
}
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
945
803
if(ret == -1){
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
804
perror("stat");
805
free(filename);
949
806
continue;
950
807
}
951
808
952
809
/* Ignore non-executable files */
953
810
if(not S_ISREG(st.st_mode)
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
956
812
if(debug){
957
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
958
" with bad type or mode\n",
959
plugindir != NULL ? plugindir : PDIR,
960
direntries[i]->d_name);
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
961
815
}
962
close(plugin_fd);
963
free(direntries[i]);
816
free(filename);
964
817
continue;
965
818
}
966
819
967
plugin *p = getplugin(direntries[i]->d_name);
820
plugin *p = getplugin(dirst->d_name);
968
821
if(p == NULL){
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
822
perror("getplugin");
823
free(filename);
972
824
continue;
973
825
}
974
826
if(p->disabled){
975
827
if(debug){
976
828
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
977
direntries[i]->d_name);
829
dirst->d_name);
978
830
}
979
close(plugin_fd);
980
free(direntries[i]);
831
free(filename);
981
832
continue;
982
833
}
983
834
{
986
837
if(g != NULL){
987
838
for(char **a = g->argv + 1; *a != NULL; a++){
988
839
if(not add_argument(p, *a)){
989
error(0, errno, "add_argument");
840
perror("add_argument");
990
841
}
991
842
}
992
843
/* Add global environment variables */
993
844
for(char **e = g->environ; *e != NULL; e++){
994
845
if(not add_environment(p, *e, false)){
995
error(0, errno, "add_environment");
846
perror("add_environment");
996
847
}
997
848
}
998
849
}
999
850
}
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
851
/* If this plugin has any environment variables, we will call
852
using execve and need to duplicate the environment from this
853
process, too. */
1002
854
if(p->environ[0] != NULL){
1003
855
for(char **e = environ; *e != NULL; e++){
1004
856
if(not add_environment(p, *e, false)){
1005
error(0, errno, "add_environment");
857
perror("add_environment");
1006
858
}
1007
859
}
1008
860
}
1009
861
1010
862
int pipefd[2];
1011
#ifndef O_CLOEXEC
1012
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1013
#else /* O_CLOEXEC */
1014
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1015
#endif /* O_CLOEXEC */
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
1016
864
if(ret == -1){
1017
error(0, errno, "pipe");
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
goto fallback;
1021
}
1022
if(pipefd[0] >= FD_SETSIZE){
1023
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1024
FD_SETSIZE);
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
#ifndef O_CLOEXEC
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
1032
869
/* Ask OS to automatic close the pipe on exec */
1033
870
ret = set_cloexec_flag(pipefd[0]);
1034
871
if(ret < 0){
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1040
874
goto fallback;
1041
875
}
1042
876
ret = set_cloexec_flag(pipefd[1]);
1043
877
if(ret < 0){
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1049
880
goto fallback;
1050
881
}
1051
#endif /* not O_CLOEXEC */
1052
882
/* Block SIGCHLD until process is safely in process list */
1053
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
&sigchld_action.sa_mask,
1055
NULL));
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1056
886
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1060
889
goto fallback;
1061
890
}
1062
891
/* Starting a new process to be watched */
1065
894
pid = fork();
1066
895
} while(pid == -1 and errno == EINTR);
1067
896
if(pid == -1){
1068
error(0, errno, "fork");
1069
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1070
&sigchld_action.sa_mask, NULL));
1071
close(pipefd[0]);
1072
close(pipefd[1]);
1073
exitstatus = EX_OSERR;
1074
free(direntries[i]);
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1075
899
goto fallback;
1076
900
}
1077
901
if(pid == 0){
1078
902
/* this is the child process */
1079
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1080
904
if(ret < 0){
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1083
907
}
1084
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
909
if(ret < 0){
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1088
912
}
1089
913
1090
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1091
915
if(ret == -1){
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1094
918
}
1095
919
1096
if(fexecve(plugin_fd, p->argv,
1097
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1098
error(0, errno, "fexecve for %s/%s",
1099
plugindir != NULL ? plugindir : PDIR,
1100
direntries[i]->d_name);
1101
_exit(EX_OSERR);
920
if(dirfd(dir) < 0){
921
/* If dir has no file descriptor, we could not set FD_CLOEXEC
922
above and must now close it manually here. */
923
closedir(dir);
924
}
925
if(p->environ[0] == NULL){
926
if(execv(filename, p->argv) < 0){
927
perror("execv");
928
_exit(EXIT_FAILURE);
929
}
930
} else {
931
if(execve(filename, p->argv, p->environ) < 0){
932
perror("execve");
933
_exit(EXIT_FAILURE);
934
}
1102
935
}
1103
936
/* no return */
1104
937
}
1105
938
/* Parent process */
1106
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
939
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
940
pipe */
941
free(filename);
942
plugin *new_plugin = getplugin(dirst->d_name);
1109
943
if(new_plugin == NULL){
1110
error(0, errno, "getplugin");
1111
ret = (int)(TEMP_FAILURE_RETRY
1112
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1113
NULL)));
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1114
948
if(ret < 0){
1115
error(0, errno, "sigprocmask");
949
perror("sigprocmask");
1116
950
}
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
951
exitstatus = EXIT_FAILURE;
1119
952
goto fallback;
1120
953
}
1121
free(direntries[i]);
1122
954
1123
955
new_plugin->pid = pid;
1124
956
new_plugin->fd = pipefd[0];
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
957
1131
958
/* Unblock SIGCHLD so signal handler can be run if this process
1132
959
has already completed */
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1134
&sigchld_action.sa_mask,
1135
NULL));
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1136
963
if(ret < 0){
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1139
966
goto fallback;
1140
967
}
1141
968
1146
973
}
1147
974
}
1148
975
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1153
978
free_plugin(getplugin(NULL));
1154
979
1155
980
for(plugin *p = plugin_list; p != NULL; p = p->next){
1168
993
fd_set rfds = rfds_all;
1169
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1170
995
if(select_ret == -1 and errno != EINTR){
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1173
998
goto fallback;
1174
999
}
1175
1000
/* OK, now either a process completed, or something can be read
1194
1019
(intmax_t) (proc->pid),
1195
1020
WTERMSIG(proc->status),
1196
1021
strsignal(WTERMSIG(proc->status)));
1022
} else if(WCOREDUMP(proc->status)){
1023
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1024
" core\n", proc->name, (intmax_t) (proc->pid));
1197
1025
}
1198
1026
}
1199
1027
1201
1029
FD_CLR(proc->fd, &rfds_all);
1202
1030
1203
1031
/* Block signal while modifying process_list */
1204
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1205
(SIG_BLOCK,
1206
&sigchld_action.sa_mask,
1207
NULL));
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1208
1035
if(ret < 0){
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1211
1038
goto fallback;
1212
1039
}
1213
1040
1216
1043
proc = next_plugin;
1217
1044
1218
1045
/* We are done modifying process list, so unblock signal */
1219
ret = (int)(TEMP_FAILURE_RETRY
1220
(sigprocmask(SIG_UNBLOCK,
1221
&sigchld_action.sa_mask, NULL)));
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1222
1049
if(ret < 0){
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1225
1052
goto fallback;
1226
1053
}
1227
1054
1237
1064
bool bret = print_out_password(proc->buffer,
1238
1065
proc->buffer_length);
1239
1066
if(not bret){
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1242
1069
}
1243
1070
goto fallback;
1244
1071
}
1251
1078
}
1252
1079
/* Before reading, make the process' data buffer large enough */
1253
1080
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1254
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1255
+ (size_t) BUFFER_SIZE);
1256
if(new_buffer == NULL){
1257
error(0, errno, "malloc");
1258
exitstatus = EX_OSERR;
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
1082
+ (size_t) BUFFER_SIZE);
1083
if(proc->buffer == NULL){
1084
perror("malloc");
1085
exitstatus = EXIT_FAILURE;
1259
1086
goto fallback;
1260
1087
}
1261
proc->buffer = new_buffer;
1262
1088
proc->buffer_size += BUFFER_SIZE;
1263
1089
}
1264
1090
/* Read from the process */
1283
1109
1284
1110
fallback:
1285
1111
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1288
1113
/* Fallback if all plugins failed, none are found or an error
1289
1114
occured */
1290
1115
bool bret;
1298
1123
}
1299
1124
bret = print_out_password(passwordbuffer, len);
1300
1125
if(not bret){
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1303
1128
}
1304
1129
}
1305
1130
1306
1131
/* Restore old signal handler */
1307
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1308
1133
if(ret == -1){
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1311
1136
}
1312
1137
1313
1138
if(custom_argv != NULL){
1317
1142
free(custom_argv);
1318
1143
}
1319
1144
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1145
if(dir != NULL){
1146
closedir(dir);
1324
1147
}
1325
1148
1326
1149
/* Kill the processes */
1330
1153
ret = kill(p->pid, SIGTERM);
1331
1154
if(ret == -1 and errno != ESRCH){
1332
1155
/* Set-uid proccesses might not get closed */
1333
error(0, errno, "kill");
1156
perror("kill");
1334
1157
}
1335
1158
}
1336
1159
}
1340
1163
ret = wait(NULL);
1341
1164
} while(ret >= 0);
1342
1165
if(errno != ECHILD){
1343
error(0, errno, "wait");
1166
perror("wait");
1344
1167
}
1345
1168
1346
1169
free_plugin_list();
1347
1170
1348
1171
free(plugindir);
1349
free(pluginhelperdir);
1350
1172
free(argfile);
1351
1173
1352
1174
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0