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- Committer: Teddy Hogeborn
- Date: 2020-11-30 09:40:14 UTC
- Revision ID: teddy@recompile.se-20201130094014-33tl5zzswqprc034
Revert commit 1222
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
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
5
* Copyright © 2008-2020 Teddy Hogeborn
6
* Copyright © 2008-2020 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
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
30
31
#include <stdbool.h> /* bool, true, false */
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() */
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() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
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() */
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
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#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() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
123
129
copy_name = strdup(name);
124
130
} while(copy_name == NULL and errno == EINTR);
125
131
if(copy_name == NULL){
132
int e = errno;
126
133
free(new_plugin);
134
errno = e;
127
135
return NULL;
128
136
}
129
137
}
137
145
new_plugin->argv = malloc(sizeof(char *) * 2);
138
146
} while(new_plugin->argv == NULL and errno == EINTR);
139
147
if(new_plugin->argv == NULL){
148
int e = errno;
140
149
free(copy_name);
141
150
free(new_plugin);
151
errno = e;
142
152
return NULL;
143
153
}
144
154
new_plugin->argv[0] = copy_name;
148
158
new_plugin->environ = malloc(sizeof(char *));
149
159
} while(new_plugin->environ == NULL and errno == EINTR);
150
160
if(new_plugin->environ == NULL){
161
int e = errno;
151
162
free(copy_name);
152
163
free(new_plugin->argv);
153
164
free(new_plugin);
165
errno = e;
154
166
return NULL;
155
167
}
156
168
new_plugin->environ[0] = NULL;
161
173
}
162
174
163
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
164
177
static bool add_to_char_array(const char *new, char ***array,
165
178
int *len){
166
179
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
167
181
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
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);
171
196
/* Malloc check */
172
if(*array == NULL){
197
if(new_array == NULL){
173
198
return false;
174
199
}
200
*array = new_array;
175
201
/* Make a copy of the new string */
176
202
char *copy;
177
203
do {
189
215
}
190
216
191
217
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
192
219
static bool add_argument(plugin *p, const char *arg){
193
220
if(p == NULL){
194
221
return false;
197
224
}
198
225
199
226
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
200
228
static bool add_environment(plugin *p, const char *def, bool replace){
201
229
if(p == NULL){
202
230
return false;
204
232
/* namelen = length of name of environment variable */
205
233
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
234
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
209
237
/* It already exists */
210
238
if(replace){
211
char *new;
239
char *new_envdef;
212
240
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
216
244
return false;
217
245
}
218
*e = new;
219
strcpy(*e, def);
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
220
248
}
221
249
return true;
222
250
}
224
252
return add_to_char_array(def, &(p->environ), &(p->envc));
225
253
}
226
254
255
#ifndef O_CLOEXEC
227
256
/*
228
257
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
258
* Descriptor Flags".
230
259
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
260
*/
261
__attribute__((warn_unused_result))
232
262
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
264
/* If reading the flags failed, return error indication now. */
235
265
if(ret < 0){
236
266
return ret;
237
267
}
238
268
/* Store modified flag word in the descriptor. */
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
ret | FD_CLOEXEC));
240
271
}
272
#endif /* not O_CLOEXEC */
241
273
242
274
243
275
/* Mark processes as completed when they exit, and save their exit
257
289
/* No child processes */
258
290
break;
259
291
}
260
perror("waitpid");
292
error(0, errno, "waitpid");
261
293
}
262
294
263
295
/* A child exited, find it in process_list */
275
307
}
276
308
277
309
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
278
311
static bool print_out_password(const char *buffer, size_t length){
279
312
ssize_t ret;
280
313
for(size_t written = 0; written < length; written += (size_t)ret){
288
321
}
289
322
290
323
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
291
325
static void free_plugin(plugin *plugin_node){
292
326
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
328
free(*arg);
295
329
}
330
free(plugin_node->name);
296
331
free(plugin_node->argv);
297
332
for(char **env = plugin_node->environ; *env != NULL; env++){
298
333
free(*env);
325
360
326
361
int main(int argc, char *argv[]){
327
362
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
328
364
char *argfile = NULL;
329
365
FILE *conffp;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
366
struct dirent **direntries = NULL;
333
367
struct stat st;
334
368
fd_set rfds_all;
335
369
int ret, maxfd = 0;
343
377
.sa_flags = SA_NOCLDSTOP };
344
378
char **custom_argv = NULL;
345
379
int custom_argc = 0;
380
int dir_fd = -1;
346
381
347
382
/* Establish a signal handler */
348
383
sigemptyset(&sigchld_action.sa_mask);
349
384
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
350
385
if(ret == -1){
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
353
388
goto fallback;
354
389
}
355
390
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
356
391
if(ret == -1){
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
359
394
goto fallback;
360
395
}
361
396
393
428
.doc = "Group ID the plugins will run as", .group = 3 },
394
429
{ .name = "debug", .key = 132,
395
430
.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 },
396
444
{ .name = NULL }
397
445
};
398
446
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
401
450
switch(key){
402
451
char *tmp;
403
intmax_t tmpmax;
452
intmax_t tmp_id;
404
453
case 'g': /* --global-options */
405
if(arg != NULL){
454
{
406
455
char *plugin_option;
407
456
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
457
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
458
break;
414
459
}
415
460
}
461
errno = 0;
416
462
}
417
463
break;
418
464
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
424
467
}
425
468
break;
426
469
case 'o': /* --options-for */
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;
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;
437
488
}
438
489
}
490
errno = 0;
439
491
}
440
492
break;
441
493
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
494
{
446
495
char *envdef = strchr(arg, ':');
447
496
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
448
499
break;
449
500
}
450
501
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
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;
453
510
}
454
511
}
455
512
break;
456
513
case 'd': /* --disable */
457
if(arg != NULL){
514
{
458
515
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
461
519
}
462
p->disabled = true;
463
520
}
464
521
break;
465
522
case 'e': /* --enable */
466
if(arg != NULL){
523
{
467
524
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
470
528
}
471
p->disabled = false;
472
529
}
473
530
break;
474
531
case 128: /* --plugin-dir */
475
532
free(plugindir);
476
533
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
534
if(plugindir != NULL){
535
errno = 0;
479
536
}
480
537
break;
481
538
case 129: /* --config-file */
482
539
/* This is already done by parse_opt_config_file() */
483
540
break;
484
541
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
487
543
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
493
548
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
494
551
break;
495
552
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
553
tmp_id = strtoimax(arg, &tmp, 10);
498
554
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
504
559
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
505
562
break;
506
563
case 132: /* --debug */
507
564
debug = true;
508
565
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;
509
589
/*
510
590
* When adding more options before this line, remember to also add a
511
591
* "case" to the "parse_opt_config_file" function below.
514
594
/* Cryptsetup always passes an argument, which is an empty
515
595
string if "none" was specified in /etc/crypttab. So if
516
596
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
597
if(arg[0] == '\0'){
598
break;
519
599
}
520
break;
521
case ARGP_KEY_END:
522
break;
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
523
605
default:
524
606
return ARGP_ERR_UNKNOWN;
525
607
}
526
return 0;
608
return errno; /* Set to 0 at start */
527
609
}
528
610
529
611
/* This option parser is the same as parse_opt() above, except it
531
613
error_t parse_opt_config_file(int key, char *arg,
532
614
__attribute__((unused))
533
615
struct argp_state *state){
616
errno = 0;
534
617
switch(key){
535
618
case 'g': /* --global-options */
536
619
case 'G': /* --global-env */
543
626
case 129: /* --config-file */
544
627
free(argfile);
545
628
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
629
if(argfile != NULL){
630
errno = 0;
548
631
}
549
632
break;
550
633
case 130: /* --userid */
551
634
case 131: /* --groupid */
552
635
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
553
640
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
641
break;
556
642
default:
557
643
return ARGP_ERR_UNKNOWN;
558
644
}
559
return 0;
645
return errno;
560
646
}
561
647
562
648
struct argp argp = { .options = options,
566
652
567
653
/* Parse using parse_opt_config_file() in order to get the custom
568
654
config file location, if any. */
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;
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;
573
669
goto fallback;
574
670
}
575
671
592
688
custom_argc = 1;
593
689
custom_argv = malloc(sizeof(char*) * 2);
594
690
if(custom_argv == NULL){
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
597
693
goto fallback;
598
694
}
599
695
custom_argv[0] = argv[0];
615
711
}
616
712
new_arg = strdup(p);
617
713
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
620
716
free(org_line);
621
717
goto fallback;
622
718
}
623
719
624
720
custom_argc += 1;
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;
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
}
632
744
}
633
745
custom_argv[custom_argc-1] = new_arg;
634
746
custom_argv[custom_argc] = NULL;
638
750
ret = fclose(conffp);
639
751
} while(ret == EOF and errno == EINTR);
640
752
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
643
755
goto fallback;
644
756
}
645
757
free(org_line);
647
759
/* Check for harmful errors and go to fallback. Other errors might
648
760
not affect opening plugins */
649
761
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
652
764
goto fallback;
653
765
}
654
766
}
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
657
769
if(custom_argv != NULL){
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;
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;
663
784
goto fallback;
664
785
}
665
786
}
666
787
667
788
/* Parse actual command line arguments, to let them override the
668
789
config file */
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;
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
}
674
823
}
675
824
676
825
if(debug){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
827
fprintf(stderr, "Plugin: %s has %d arguments\n",
679
828
p->name ? p->name : "Global", p->argc - 1);
680
829
for(char **a = p->argv; *a != NULL; a++){
687
836
}
688
837
}
689
838
690
/* Strip permissions down to nobody */
691
setgid(gid);
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);
692
865
if(ret == -1){
693
perror("setgid");
866
error(0, errno, "setgid");
694
867
}
695
868
ret = setuid(uid);
696
869
if(ret == -1){
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 */
870
error(0, errno, "setuid");
871
}
872
873
/* Open plugin directory with close_on_exec flag */
713
874
{
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;
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;
721
919
}
722
920
}
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;
723
931
}
724
932
725
933
FD_ZERO(&rfds_all);
726
934
727
935
/* Read and execute any executable in the plugin directory*/
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");
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]);
799
942
continue;
800
943
}
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
803
945
if(ret == -1){
804
perror("stat");
805
free(filename);
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
806
949
continue;
807
950
}
808
951
809
952
/* Ignore non-executable files */
810
953
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
812
956
if(debug){
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
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);
815
961
}
816
free(filename);
962
close(plugin_fd);
963
free(direntries[i]);
817
964
continue;
818
965
}
819
966
820
plugin *p = getplugin(dirst->d_name);
967
plugin *p = getplugin(direntries[i]->d_name);
821
968
if(p == NULL){
822
perror("getplugin");
823
free(filename);
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
824
972
continue;
825
973
}
826
974
if(p->disabled){
827
975
if(debug){
828
976
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
829
dirst->d_name);
977
direntries[i]->d_name);
830
978
}
831
free(filename);
979
close(plugin_fd);
980
free(direntries[i]);
832
981
continue;
833
982
}
834
983
{
837
986
if(g != NULL){
838
987
for(char **a = g->argv + 1; *a != NULL; a++){
839
988
if(not add_argument(p, *a)){
840
perror("add_argument");
989
error(0, errno, "add_argument");
841
990
}
842
991
}
843
992
/* Add global environment variables */
844
993
for(char **e = g->environ; *e != NULL; e++){
845
994
if(not add_environment(p, *e, false)){
846
perror("add_environment");
995
error(0, errno, "add_environment");
847
996
}
848
997
}
849
998
}
850
999
}
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. */
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
854
1002
if(p->environ[0] != NULL){
855
1003
for(char **e = environ; *e != NULL; e++){
856
1004
if(not add_environment(p, *e, false)){
857
perror("add_environment");
1005
error(0, errno, "add_environment");
858
1006
}
859
1007
}
860
1008
}
861
1009
862
1010
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
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 */
864
1016
if(ret == -1){
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
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
869
1032
/* Ask OS to automatic close the pipe on exec */
870
1033
ret = set_cloexec_flag(pipefd[0]);
871
1034
if(ret < 0){
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
874
1040
goto fallback;
875
1041
}
876
1042
ret = set_cloexec_flag(pipefd[1]);
877
1043
if(ret < 0){
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
880
1049
goto fallback;
881
1050
}
1051
#endif /* not O_CLOEXEC */
882
1052
/* Block SIGCHLD until process is safely in process list */
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1053
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
&sigchld_action.sa_mask,
1055
NULL));
886
1056
if(ret < 0){
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
889
1060
goto fallback;
890
1061
}
891
1062
/* Starting a new process to be watched */
894
1065
pid = fork();
895
1066
} while(pid == -1 and errno == EINTR);
896
1067
if(pid == -1){
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
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]);
899
1075
goto fallback;
900
1076
}
901
1077
if(pid == 0){
902
1078
/* this is the child process */
903
1079
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
904
1080
if(ret < 0){
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
907
1083
}
908
1084
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
1085
if(ret < 0){
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
912
1088
}
913
1089
914
1090
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
1091
if(ret == -1){
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
918
1094
}
919
1095
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
}
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);
935
1102
}
936
1103
/* no return */
937
1104
}
938
1105
/* Parent process */
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);
1106
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
943
1109
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1110
error(0, errno, "getplugin");
1111
ret = (int)(TEMP_FAILURE_RETRY
1112
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1113
NULL)));
948
1114
if(ret < 0){
949
perror("sigprocmask");
1115
error(0, errno, "sigprocmask");
950
1116
}
951
exitstatus = EXIT_FAILURE;
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
952
1119
goto fallback;
953
1120
}
1121
free(direntries[i]);
954
1122
955
1123
new_plugin->pid = pid;
956
1124
new_plugin->fd = pipefd[0];
957
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
958
1131
/* Unblock SIGCHLD so signal handler can be run if this process
959
1132
has already completed */
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1134
&sigchld_action.sa_mask,
1135
NULL));
963
1136
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
966
1139
goto fallback;
967
1140
}
968
1141
973
1146
}
974
1147
}
975
1148
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
978
1153
free_plugin(getplugin(NULL));
979
1154
980
1155
for(plugin *p = plugin_list; p != NULL; p = p->next){
993
1168
fd_set rfds = rfds_all;
994
1169
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
995
1170
if(select_ret == -1 and errno != EINTR){
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
998
1173
goto fallback;
999
1174
}
1000
1175
/* OK, now either a process completed, or something can be read
1019
1194
(intmax_t) (proc->pid),
1020
1195
WTERMSIG(proc->status),
1021
1196
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));
1025
1197
}
1026
1198
}
1027
1199
1029
1201
FD_CLR(proc->fd, &rfds_all);
1030
1202
1031
1203
/* Block signal while modifying process_list */
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1204
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1205
(SIG_BLOCK,
1206
&sigchld_action.sa_mask,
1207
NULL));
1035
1208
if(ret < 0){
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
1038
1211
goto fallback;
1039
1212
}
1040
1213
1043
1216
proc = next_plugin;
1044
1217
1045
1218
/* We are done modifying process list, so unblock signal */
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1219
ret = (int)(TEMP_FAILURE_RETRY
1220
(sigprocmask(SIG_UNBLOCK,
1221
&sigchld_action.sa_mask, NULL)));
1049
1222
if(ret < 0){
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1052
1225
goto fallback;
1053
1226
}
1054
1227
1064
1237
bool bret = print_out_password(proc->buffer,
1065
1238
proc->buffer_length);
1066
1239
if(not bret){
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1069
1242
}
1070
1243
goto fallback;
1071
1244
}
1078
1251
}
1079
1252
/* Before reading, make the process' data buffer large enough */
1080
1253
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
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;
1086
1259
goto fallback;
1087
1260
}
1261
proc->buffer = new_buffer;
1088
1262
proc->buffer_size += BUFFER_SIZE;
1089
1263
}
1090
1264
/* Read from the process */
1109
1283
1110
1284
fallback:
1111
1285
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1113
1288
/* Fallback if all plugins failed, none are found or an error
1114
1289
occured */
1115
1290
bool bret;
1123
1298
}
1124
1299
bret = print_out_password(passwordbuffer, len);
1125
1300
if(not bret){
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1128
1303
}
1129
1304
}
1130
1305
1131
1306
/* Restore old signal handler */
1132
1307
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
1308
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1136
1311
}
1137
1312
1138
1313
if(custom_argv != NULL){
1142
1317
free(custom_argv);
1143
1318
}
1144
1319
1145
if(dir != NULL){
1146
closedir(dir);
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1147
1324
}
1148
1325
1149
1326
/* Kill the processes */
1153
1330
ret = kill(p->pid, SIGTERM);
1154
1331
if(ret == -1 and errno != ESRCH){
1155
1332
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1333
error(0, errno, "kill");
1157
1334
}
1158
1335
}
1159
1336
}
1163
1340
ret = wait(NULL);
1164
1341
} while(ret >= 0);
1165
1342
if(errno != ECHILD){
1166
perror("wait");
1343
error(0, errno, "wait");
1167
1344
}
1168
1345
1169
1346
free_plugin_list();
1170
1347
1171
1348
free(plugindir);
1349
free(pluginhelperdir);
1172
1350
free(argfile);
1173
1351
1174
1352
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0