To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 24.1.141
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.141
- Committer: Björn Påhlsson
- Date: 2009-09-21 13:13:47 UTC
- mfrom: (237.2.127 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@braxen-20090921131347-mhuf1qnwavhyd6l1
fixed incorrect include comments
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- 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(), exit(), EXIT_SUCCESS,
30
realloc() */
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(), strcmp(), strncmp() */
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
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} 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);
185
171
/* Malloc check */
186
if(new_array == NULL){
172
if(*array == NULL){
187
173
return false;
188
174
}
189
*array = new_array;
190
175
/* Make a copy of the new string */
191
176
char *copy;
192
177
do {
204
189
}
205
190
206
191
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
192
static bool add_argument(plugin *p, const char *arg){
209
193
if(p == NULL){
210
194
return false;
213
197
}
214
198
215
199
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
200
static bool add_environment(plugin *p, const char *def, bool replace){
218
201
if(p == NULL){
219
202
return false;
221
204
/* namelen = length of name of environment variable */
222
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
206
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
226
209
/* It already exists */
227
210
if(replace){
228
char *new_envdef;
211
char *new;
229
212
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
233
216
return false;
234
217
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
237
220
}
238
221
return true;
239
222
}
241
224
return add_to_char_array(def, &(p->environ), &(p->envc));
242
225
}
243
226
244
#ifndef O_CLOEXEC
245
227
/*
246
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
229
* Descriptor Flags".
248
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
249
231
*/
250
__attribute__((warn_unused_result))
251
232
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
253
234
/* If reading the flags failed, return error indication now. */
254
235
if(ret < 0){
255
236
return ret;
256
237
}
257
238
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
260
240
}
261
#endif /* not O_CLOEXEC */
262
241
263
242
264
243
/* Mark processes as completed when they exit, and save their exit
278
257
/* No child processes */
279
258
break;
280
259
}
281
error(0, errno, "waitpid");
260
perror("waitpid");
282
261
}
283
262
284
263
/* A child exited, find it in process_list */
296
275
}
297
276
298
277
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
278
static bool print_out_password(const char *buffer, size_t length){
301
279
ssize_t ret;
302
280
for(size_t written = 0; written < length; written += (size_t)ret){
310
288
}
311
289
312
290
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
291
static void free_plugin(plugin *plugin_node){
315
292
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
294
free(*arg);
318
295
}
319
free(plugin_node->name);
320
296
free(plugin_node->argv);
321
297
for(char **env = plugin_node->environ; *env != NULL; env++){
322
298
free(*env);
349
325
350
326
int main(int argc, char *argv[]){
351
327
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
353
328
char *argfile = NULL;
354
329
FILE *conffp;
355
struct dirent **direntries = NULL;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
356
333
struct stat st;
357
334
fd_set rfds_all;
358
335
int ret, maxfd = 0;
366
343
.sa_flags = SA_NOCLDSTOP };
367
344
char **custom_argv = NULL;
368
345
int custom_argc = 0;
369
int dir_fd = -1;
370
346
371
347
/* Establish a signal handler */
372
348
sigemptyset(&sigchld_action.sa_mask);
373
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
374
350
if(ret == -1){
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
377
353
goto fallback;
378
354
}
379
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
380
356
if(ret == -1){
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
383
359
goto fallback;
384
360
}
385
361
417
393
.doc = "Group ID the plugins will run as", .group = 3 },
418
394
{ .name = "debug", .key = 132,
419
395
.doc = "Debug mode", .group = 4 },
420
{ .name = "plugin-helper-dir", .key = 133,
421
.arg = "DIRECTORY",
422
.doc = "Specify a different plugin helper directory",
423
.group = 2 },
424
/*
425
* These reproduce what we would get without ARGP_NO_HELP
426
*/
427
{ .name = "help", .key = '?',
428
.doc = "Give this help list", .group = -1 },
429
{ .name = "usage", .key = -3,
430
.doc = "Give a short usage message", .group = -1 },
431
{ .name = "version", .key = 'V',
432
.doc = "Print program version", .group = -1 },
433
396
{ .name = NULL }
434
397
};
435
398
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
439
401
switch(key){
440
402
char *tmp;
441
intmax_t tmp_id;
403
intmax_t tmpmax;
442
404
case 'g': /* --global-options */
443
{
405
if(arg != NULL){
444
406
char *plugin_option;
445
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
446
411
if(not add_argument(getplugin(NULL), plugin_option)){
447
break;
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
448
414
}
449
415
}
450
errno = 0;
451
416
}
452
417
break;
453
418
case 'G': /* --global-env */
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
456
424
}
457
425
break;
458
426
case 'o': /* --options-for */
459
{
460
char *option_list = strchr(arg, ':');
461
if(option_list == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
break;
465
}
466
*option_list = '\0';
467
option_list++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
472
}
473
char *option;
474
while((option = strsep(&option_list, ",")) != NULL){
475
if(not add_argument(getplugin(arg), option)){
476
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;
477
437
}
478
438
}
479
errno = 0;
480
439
}
481
440
break;
482
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
483
445
{
484
446
char *envdef = strchr(arg, ':');
485
447
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
488
448
break;
489
449
}
490
450
*envdef = '\0';
491
envdef++;
492
if(arg[0] == '\0'){
493
argp_error(state, "Empty plugin name");
494
errno = EINVAL;
495
break;
496
}
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
499
453
}
500
454
}
501
455
break;
502
456
case 'd': /* --disable */
503
{
457
if(arg != NULL){
504
458
plugin *p = getplugin(arg);
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
508
461
}
462
p->disabled = true;
509
463
}
510
464
break;
511
465
case 'e': /* --enable */
512
{
466
if(arg != NULL){
513
467
plugin *p = getplugin(arg);
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
517
470
}
471
p->disabled = false;
518
472
}
519
473
break;
520
474
case 128: /* --plugin-dir */
521
475
free(plugindir);
522
476
plugindir = strdup(arg);
523
if(plugindir != NULL){
524
errno = 0;
477
if(plugindir == NULL){
478
perror("strdup");
525
479
}
526
480
break;
527
481
case 129: /* --config-file */
528
482
/* This is already done by parse_opt_config_file() */
529
483
break;
530
484
case 130: /* --userid */
531
tmp_id = strtoimax(arg, &tmp, 10);
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
532
487
if(errno != 0 or tmp == arg or *tmp != '\0'
533
or tmp_id != (uid_t)tmp_id){
534
argp_error(state, "Bad user ID number: \"%s\", using %"
535
PRIdMAX, arg, (intmax_t)uid);
536
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;
537
493
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
540
494
break;
541
495
case 131: /* --groupid */
542
tmp_id = strtoimax(arg, &tmp, 10);
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
543
498
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (gid_t)tmp_id){
545
argp_error(state, "Bad group ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)gid);
547
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;
548
504
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
551
505
break;
552
506
case 132: /* --debug */
553
507
debug = true;
554
508
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
562
/*
563
* These reproduce what we would get without ARGP_NO_HELP
564
*/
565
case '?': /* --help */
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
case -3: /* --usage */
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
argp_state_help(state, state->out_stream,
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
case 'V': /* --version */
575
fprintf(state->out_stream, "%s\n", argp_program_version);
576
exit(EXIT_SUCCESS);
577
break;
578
509
/*
579
510
* When adding more options before this line, remember to also add a
580
511
* "case" to the "parse_opt_config_file" function below.
583
514
/* Cryptsetup always passes an argument, which is an empty
584
515
string if "none" was specified in /etc/crypttab. So if
585
516
argument was empty, we ignore it silently. */
586
if(arg[0] == '\0'){
587
break;
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
588
519
}
589
/* FALLTHROUGH */
520
break;
521
case ARGP_KEY_END:
522
break;
590
523
default:
591
524
return ARGP_ERR_UNKNOWN;
592
525
}
593
return errno; /* Set to 0 at start */
526
return 0;
594
527
}
595
528
596
529
/* This option parser is the same as parse_opt() above, except it
598
531
error_t parse_opt_config_file(int key, char *arg,
599
532
__attribute__((unused))
600
533
struct argp_state *state){
601
errno = 0;
602
534
switch(key){
603
535
case 'g': /* --global-options */
604
536
case 'G': /* --global-env */
611
543
case 129: /* --config-file */
612
544
free(argfile);
613
545
argfile = strdup(arg);
614
if(argfile != NULL){
615
errno = 0;
546
if(argfile == NULL){
547
perror("strdup");
616
548
}
617
549
break;
618
550
case 130: /* --userid */
619
551
case 131: /* --groupid */
620
552
case 132: /* --debug */
621
case 133: /* --plugin-helper-dir */
622
case '?': /* --help */
623
case -3: /* --usage */
624
case 'V': /* --version */
625
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
626
555
break;
627
556
default:
628
557
return ARGP_ERR_UNKNOWN;
629
558
}
630
return errno;
559
return 0;
631
560
}
632
561
633
562
struct argp argp = { .options = options,
637
566
638
567
/* Parse using parse_opt_config_file() in order to get the custom
639
568
config file location, if any. */
640
ret = argp_parse(&argp, argc, argv,
641
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
642
NULL, NULL);
643
switch(ret){
644
case 0:
645
break;
646
case ENOMEM:
647
default:
648
errno = ret;
649
error(0, errno, "argp_parse");
650
exitstatus = EX_OSERR;
651
goto fallback;
652
case EINVAL:
653
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;
654
573
goto fallback;
655
574
}
656
575
673
592
custom_argc = 1;
674
593
custom_argv = malloc(sizeof(char*) * 2);
675
594
if(custom_argv == NULL){
676
error(0, errno, "malloc");
677
exitstatus = EX_OSERR;
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
678
597
goto fallback;
679
598
}
680
599
custom_argv[0] = argv[0];
696
615
}
697
616
new_arg = strdup(p);
698
617
if(new_arg == NULL){
699
error(0, errno, "strdup");
700
exitstatus = EX_OSERR;
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
701
620
free(org_line);
702
621
goto fallback;
703
622
}
704
623
705
624
custom_argc += 1;
706
{
707
char **new_argv = realloc(custom_argv, sizeof(char *)
708
* ((size_t)custom_argc + 1));
709
if(new_argv == NULL){
710
error(0, errno, "realloc");
711
exitstatus = EX_OSERR;
712
free(new_arg);
713
free(org_line);
714
goto fallback;
715
} else {
716
custom_argv = new_argv;
717
}
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;
718
632
}
719
633
custom_argv[custom_argc-1] = new_arg;
720
634
custom_argv[custom_argc] = NULL;
724
638
ret = fclose(conffp);
725
639
} while(ret == EOF and errno == EINTR);
726
640
if(ret == EOF){
727
error(0, errno, "fclose");
728
exitstatus = EX_IOERR;
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
729
643
goto fallback;
730
644
}
731
645
free(org_line);
733
647
/* Check for harmful errors and go to fallback. Other errors might
734
648
not affect opening plugins */
735
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
736
error(0, errno, "fopen");
737
exitstatus = EX_OSERR;
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
738
652
goto fallback;
739
653
}
740
654
}
741
/* If there were any arguments from the configuration file, pass
742
them to parser as command line arguments */
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
743
657
if(custom_argv != NULL){
744
ret = argp_parse(&argp, custom_argc, custom_argv,
745
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
746
NULL, NULL);
747
switch(ret){
748
case 0:
749
break;
750
case ENOMEM:
751
default:
752
errno = ret;
753
error(0, errno, "argp_parse");
754
exitstatus = EX_OSERR;
755
goto fallback;
756
case EINVAL:
757
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;
758
663
goto fallback;
759
664
}
760
665
}
761
666
762
667
/* Parse actual command line arguments, to let them override the
763
668
config file */
764
ret = argp_parse(&argp, argc, argv,
765
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
766
NULL, NULL);
767
switch(ret){
768
case 0:
769
break;
770
case ENOMEM:
771
default:
772
errno = ret;
773
error(0, errno, "argp_parse");
774
exitstatus = EX_OSERR;
775
goto fallback;
776
case EINVAL:
777
exitstatus = EX_USAGE;
778
goto fallback;
779
}
780
781
{
782
char *pluginhelperenv;
783
bool bret = true;
784
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
785
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
786
if(ret != -1){
787
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
788
}
789
if(ret == -1 or not bret){
790
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
791
" environment variable to \"%s\" for all plugins\n",
792
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
793
}
794
if(ret != -1){
795
free(pluginhelperenv);
796
}
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;
797
674
}
798
675
799
676
if(debug){
800
for(plugin *p = plugin_list; p != NULL; p = p->next){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
801
678
fprintf(stderr, "Plugin: %s has %d arguments\n",
802
679
p->name ? p->name : "Global", p->argc - 1);
803
680
for(char **a = p->argv; *a != NULL; a++){
810
687
}
811
688
}
812
689
813
if(getuid() == 0){
814
/* Work around Debian bug #633582:
815
<https://bugs.debian.org/633582> */
816
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
817
if(plugindir_fd == -1){
818
if(errno != ENOENT){
819
error(0, errno, "open(\"" PDIR "\")");
820
}
821
} else {
822
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
823
if(ret == -1){
824
error(0, errno, "fstat");
825
} else {
826
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
827
ret = fchown(plugindir_fd, uid, gid);
828
if(ret == -1){
829
error(0, errno, "fchown");
830
}
831
}
832
}
833
close(plugindir_fd);
834
}
835
}
836
837
/* Lower permissions */
838
ret = setgid(gid);
690
/* Strip permissions down to nobody */
691
setgid(gid);
839
692
if(ret == -1){
840
error(0, errno, "setgid");
693
perror("setgid");
841
694
}
842
695
ret = setuid(uid);
843
696
if(ret == -1){
844
error(0, errno, "setuid");
845
}
846
847
/* 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 */
848
713
{
849
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
850
#ifdef O_CLOEXEC
851
O_CLOEXEC
852
#else /* not O_CLOEXEC */
853
0
854
#endif /* not O_CLOEXEC */
855
);
856
if(dir_fd == -1){
857
error(0, errno, "Could not open plugin dir");
858
exitstatus = EX_UNAVAILABLE;
859
goto fallback;
860
}
861
862
#ifndef O_CLOEXEC
863
/* Set the FD_CLOEXEC flag on the directory */
864
ret = set_cloexec_flag(dir_fd);
865
if(ret < 0){
866
error(0, errno, "set_cloexec_flag");
867
exitstatus = EX_OSERR;
868
goto fallback;
869
}
870
#endif /* O_CLOEXEC */
871
}
872
873
int good_name(const struct dirent * const dirent){
874
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
875
"*.dpkg-old", "*.dpkg-bak",
876
"*.dpkg-divert", NULL };
877
#ifdef __GNUC__
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
#endif
881
for(const char **pat = (const char **)patterns;
882
*pat != NULL; pat++){
883
#ifdef __GNUC__
884
#pragma GCC diagnostic pop
885
#endif
886
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
887
!= FNM_NOMATCH){
888
if(debug){
889
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
890
" matching pattern %s\n", dirent->d_name, *pat);
891
}
892
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;
893
721
}
894
722
}
895
return 1;
896
}
897
898
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
899
alphasort);
900
if(numplugins == -1){
901
error(0, errno, "Could not scan plugin dir");
902
direntries = NULL;
903
exitstatus = EX_OSERR;
904
goto fallback;
905
723
}
906
724
907
725
FD_ZERO(&rfds_all);
908
726
909
727
/* Read and execute any executable in the plugin directory*/
910
for(int i = 0; i < numplugins; i++){
911
912
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
913
if(plugin_fd == -1){
914
error(0, errno, "Could not open plugin");
915
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");
916
799
continue;
917
800
}
918
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
919
803
if(ret == -1){
920
error(0, errno, "stat");
921
close(plugin_fd);
922
free(direntries[i]);
804
perror("stat");
805
free(filename);
923
806
continue;
924
807
}
925
808
926
809
/* Ignore non-executable files */
927
810
if(not S_ISREG(st.st_mode)
928
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
929
X_OK, 0)) != 0)){
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
930
812
if(debug){
931
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
932
" with bad type or mode\n",
933
plugindir != NULL ? plugindir : PDIR,
934
direntries[i]->d_name);
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
935
815
}
936
close(plugin_fd);
937
free(direntries[i]);
816
free(filename);
938
817
continue;
939
818
}
940
819
941
plugin *p = getplugin(direntries[i]->d_name);
820
plugin *p = getplugin(dirst->d_name);
942
821
if(p == NULL){
943
error(0, errno, "getplugin");
944
close(plugin_fd);
945
free(direntries[i]);
822
perror("getplugin");
823
free(filename);
946
824
continue;
947
825
}
948
826
if(p->disabled){
949
827
if(debug){
950
828
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
951
direntries[i]->d_name);
829
dirst->d_name);
952
830
}
953
close(plugin_fd);
954
free(direntries[i]);
831
free(filename);
955
832
continue;
956
833
}
957
834
{
960
837
if(g != NULL){
961
838
for(char **a = g->argv + 1; *a != NULL; a++){
962
839
if(not add_argument(p, *a)){
963
error(0, errno, "add_argument");
840
perror("add_argument");
964
841
}
965
842
}
966
843
/* Add global environment variables */
967
844
for(char **e = g->environ; *e != NULL; e++){
968
845
if(not add_environment(p, *e, false)){
969
error(0, errno, "add_environment");
846
perror("add_environment");
970
847
}
971
848
}
972
849
}
973
850
}
974
/* If this plugin has any environment variables, we need to
975
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. */
976
854
if(p->environ[0] != NULL){
977
855
for(char **e = environ; *e != NULL; e++){
978
856
if(not add_environment(p, *e, false)){
979
error(0, errno, "add_environment");
857
perror("add_environment");
980
858
}
981
859
}
982
860
}
983
861
984
862
int pipefd[2];
985
#ifndef O_CLOEXEC
986
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
987
#else /* O_CLOEXEC */
988
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
989
#endif /* O_CLOEXEC */
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
990
864
if(ret == -1){
991
error(0, errno, "pipe");
992
exitstatus = EX_OSERR;
993
free(direntries[i]);
994
goto fallback;
995
}
996
if(pipefd[0] >= FD_SETSIZE){
997
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
998
FD_SETSIZE);
999
close(pipefd[0]);
1000
close(pipefd[1]);
1001
exitstatus = EX_OSERR;
1002
free(direntries[i]);
1003
goto fallback;
1004
}
1005
#ifndef O_CLOEXEC
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
1006
869
/* Ask OS to automatic close the pipe on exec */
1007
870
ret = set_cloexec_flag(pipefd[0]);
1008
871
if(ret < 0){
1009
error(0, errno, "set_cloexec_flag");
1010
close(pipefd[0]);
1011
close(pipefd[1]);
1012
exitstatus = EX_OSERR;
1013
free(direntries[i]);
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1014
874
goto fallback;
1015
875
}
1016
876
ret = set_cloexec_flag(pipefd[1]);
1017
877
if(ret < 0){
1018
error(0, errno, "set_cloexec_flag");
1019
close(pipefd[0]);
1020
close(pipefd[1]);
1021
exitstatus = EX_OSERR;
1022
free(direntries[i]);
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1023
880
goto fallback;
1024
881
}
1025
#endif /* not O_CLOEXEC */
1026
882
/* Block SIGCHLD until process is safely in process list */
1027
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1028
&sigchld_action.sa_mask,
1029
NULL));
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1030
886
if(ret < 0){
1031
error(0, errno, "sigprocmask");
1032
exitstatus = EX_OSERR;
1033
free(direntries[i]);
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1034
889
goto fallback;
1035
890
}
1036
891
/* Starting a new process to be watched */
1039
894
pid = fork();
1040
895
} while(pid == -1 and errno == EINTR);
1041
896
if(pid == -1){
1042
error(0, errno, "fork");
1043
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1044
&sigchld_action.sa_mask, NULL));
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1049
899
goto fallback;
1050
900
}
1051
901
if(pid == 0){
1052
902
/* this is the child process */
1053
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1054
904
if(ret < 0){
1055
error(0, errno, "sigaction");
1056
_exit(EX_OSERR);
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1057
907
}
1058
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1059
909
if(ret < 0){
1060
error(0, errno, "sigprocmask");
1061
_exit(EX_OSERR);
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1062
912
}
1063
913
1064
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1065
915
if(ret == -1){
1066
error(0, errno, "dup2");
1067
_exit(EX_OSERR);
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1068
918
}
1069
919
1070
if(fexecve(plugin_fd, p->argv,
1071
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1072
error(0, errno, "fexecve for %s/%s",
1073
plugindir != NULL ? plugindir : PDIR,
1074
direntries[i]->d_name);
1075
_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
}
1076
935
}
1077
936
/* no return */
1078
937
}
1079
938
/* Parent process */
1080
close(pipefd[1]); /* Close unused write end of pipe */
1081
close(plugin_fd);
1082
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);
1083
943
if(new_plugin == NULL){
1084
error(0, errno, "getplugin");
1085
ret = (int)(TEMP_FAILURE_RETRY
1086
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1087
NULL)));
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1088
948
if(ret < 0){
1089
error(0, errno, "sigprocmask");
949
perror("sigprocmask");
1090
950
}
1091
exitstatus = EX_OSERR;
1092
free(direntries[i]);
951
exitstatus = EXIT_FAILURE;
1093
952
goto fallback;
1094
953
}
1095
free(direntries[i]);
1096
954
1097
955
new_plugin->pid = pid;
1098
956
new_plugin->fd = pipefd[0];
1099
1100
if(debug){
1101
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1102
new_plugin->name, (intmax_t) (new_plugin->pid));
1103
}
1104
957
1105
958
/* Unblock SIGCHLD so signal handler can be run if this process
1106
959
has already completed */
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1110
963
if(ret < 0){
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1113
966
goto fallback;
1114
967
}
1115
968
1120
973
}
1121
974
}
1122
975
1123
free(direntries);
1124
direntries = NULL;
1125
close(dir_fd);
1126
dir_fd = -1;
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1127
978
free_plugin(getplugin(NULL));
1128
979
1129
980
for(plugin *p = plugin_list; p != NULL; p = p->next){
1142
993
fd_set rfds = rfds_all;
1143
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1144
995
if(select_ret == -1 and errno != EINTR){
1145
error(0, errno, "select");
1146
exitstatus = EX_OSERR;
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1147
998
goto fallback;
1148
999
}
1149
1000
/* OK, now either a process completed, or something can be read
1168
1019
(intmax_t) (proc->pid),
1169
1020
WTERMSIG(proc->status),
1170
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));
1171
1025
}
1172
1026
}
1173
1027
1175
1029
FD_CLR(proc->fd, &rfds_all);
1176
1030
1177
1031
/* Block signal while modifying process_list */
1178
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1179
(SIG_BLOCK,
1180
&sigchld_action.sa_mask,
1181
NULL));
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1182
1035
if(ret < 0){
1183
error(0, errno, "sigprocmask");
1184
exitstatus = EX_OSERR;
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1185
1038
goto fallback;
1186
1039
}
1187
1040
1190
1043
proc = next_plugin;
1191
1044
1192
1045
/* We are done modifying process list, so unblock signal */
1193
ret = (int)(TEMP_FAILURE_RETRY
1194
(sigprocmask(SIG_UNBLOCK,
1195
&sigchld_action.sa_mask, NULL)));
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1196
1049
if(ret < 0){
1197
error(0, errno, "sigprocmask");
1198
exitstatus = EX_OSERR;
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1199
1052
goto fallback;
1200
1053
}
1201
1054
1211
1064
bool bret = print_out_password(proc->buffer,
1212
1065
proc->buffer_length);
1213
1066
if(not bret){
1214
error(0, errno, "print_out_password");
1215
exitstatus = EX_IOERR;
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1216
1069
}
1217
1070
goto fallback;
1218
1071
}
1225
1078
}
1226
1079
/* Before reading, make the process' data buffer large enough */
1227
1080
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1228
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1229
+ (size_t) BUFFER_SIZE);
1230
if(new_buffer == NULL){
1231
error(0, errno, "malloc");
1232
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;
1233
1086
goto fallback;
1234
1087
}
1235
proc->buffer = new_buffer;
1236
1088
proc->buffer_size += BUFFER_SIZE;
1237
1089
}
1238
1090
/* Read from the process */
1257
1109
1258
1110
fallback:
1259
1111
1260
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1261
and exitstatus != EX_OK)){
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1262
1113
/* Fallback if all plugins failed, none are found or an error
1263
1114
occured */
1264
1115
bool bret;
1272
1123
}
1273
1124
bret = print_out_password(passwordbuffer, len);
1274
1125
if(not bret){
1275
error(0, errno, "print_out_password");
1276
exitstatus = EX_IOERR;
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1277
1128
}
1278
1129
}
1279
1130
1280
1131
/* Restore old signal handler */
1281
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1282
1133
if(ret == -1){
1283
error(0, errno, "sigaction");
1284
exitstatus = EX_OSERR;
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1285
1136
}
1286
1137
1287
1138
if(custom_argv != NULL){
1291
1142
free(custom_argv);
1292
1143
}
1293
1144
1294
free(direntries);
1295
1296
if(dir_fd != -1){
1297
close(dir_fd);
1145
if(dir != NULL){
1146
closedir(dir);
1298
1147
}
1299
1148
1300
1149
/* Kill the processes */
1304
1153
ret = kill(p->pid, SIGTERM);
1305
1154
if(ret == -1 and errno != ESRCH){
1306
1155
/* Set-uid proccesses might not get closed */
1307
error(0, errno, "kill");
1156
perror("kill");
1308
1157
}
1309
1158
}
1310
1159
}
1314
1163
ret = wait(NULL);
1315
1164
} while(ret >= 0);
1316
1165
if(errno != ECHILD){
1317
error(0, errno, "wait");
1166
perror("wait");
1318
1167
}
1319
1168
1320
1169
free_plugin_list();
1321
1170
1322
1171
free(plugindir);
1323
free(pluginhelperdir);
1324
1172
free(argfile);
1325
1173
1326
1174
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0