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- Committer: Teddy Hogeborn
- Date: 2018-02-10 19:02:09 UTC
- mfrom: (237.7.478 trunk)
- Revision ID: teddy@recompile.se-20180210190209-h3y8b55v0dmn5ri6
Merge from trunk
- files added:
- 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 © 2008,2009 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 © 2008-2018 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
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(), exit(), EXIT_SUCCESS,
30
realloc() */
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))){
110
116
}
111
117
}
112
118
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
114
123
if(new_plugin == NULL){
115
124
return NULL;
116
125
}
117
126
char *copy_name = NULL;
118
127
if(name != NULL){
119
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
120
131
if(copy_name == NULL){
132
int e = errno;
121
133
free(new_plugin);
134
errno = e;
122
135
return NULL;
123
136
}
124
137
}
128
141
.disabled = false,
129
142
.next = plugin_list };
130
143
131
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
132
147
if(new_plugin->argv == NULL){
148
int e = errno;
133
149
free(copy_name);
134
150
free(new_plugin);
151
errno = e;
135
152
return NULL;
136
153
}
137
154
new_plugin->argv[0] = copy_name;
138
155
new_plugin->argv[1] = NULL;
139
156
140
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
141
160
if(new_plugin->environ == NULL){
161
int e = errno;
142
162
free(copy_name);
143
163
free(new_plugin->argv);
144
164
free(new_plugin);
165
errno = e;
145
166
return NULL;
146
167
}
147
168
new_plugin->environ[0] = NULL;
152
173
}
153
174
154
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
155
177
static bool add_to_char_array(const char *new, char ***array,
156
178
int *len){
157
179
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
160
185
/* Malloc check */
161
if(*array == NULL){
186
if(new_array == NULL){
162
187
return false;
163
188
}
189
*array = new_array;
164
190
/* Make a copy of the new string */
165
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
166
195
if(copy == NULL){
167
196
return false;
168
197
}
175
204
}
176
205
177
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
178
208
static bool add_argument(plugin *p, const char *arg){
179
209
if(p == NULL){
180
210
return false;
183
213
}
184
214
185
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
186
217
static bool add_environment(plugin *p, const char *def, bool replace){
187
218
if(p == NULL){
188
219
return false;
190
221
/* namelen = length of name of environment variable */
191
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
223
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
195
226
/* It already exists */
196
227
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
199
233
return false;
200
234
}
201
*e = new;
202
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
203
237
}
204
238
return true;
205
239
}
207
241
return add_to_char_array(def, &(p->environ), &(p->envc));
208
242
}
209
243
244
#ifndef O_CLOEXEC
210
245
/*
211
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
247
* Descriptor Flags".
213
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
249
*/
250
__attribute__((warn_unused_result))
215
251
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
253
/* If reading the flags failed, return error indication now. */
218
254
if(ret < 0){
219
255
return ret;
220
256
}
221
257
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
223
260
}
261
#endif /* not O_CLOEXEC */
224
262
225
263
226
264
/* Mark processes as completed when they exit, and save their exit
240
278
/* No child processes */
241
279
break;
242
280
}
243
perror("waitpid");
281
error(0, errno, "waitpid");
244
282
}
245
283
246
284
/* A child exited, find it in process_list */
258
296
}
259
297
260
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
261
300
static bool print_out_password(const char *buffer, size_t length){
262
301
ssize_t ret;
263
302
for(size_t written = 0; written < length; written += (size_t)ret){
271
310
}
272
311
273
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
274
314
static void free_plugin(plugin *plugin_node){
275
315
316
free(plugin_node->name);
276
317
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
318
free(*arg);
278
319
}
308
349
309
350
int main(int argc, char *argv[]){
310
351
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
311
353
char *argfile = NULL;
312
354
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
355
struct dirent **direntries = NULL;
316
356
struct stat st;
317
357
fd_set rfds_all;
318
358
int ret, maxfd = 0;
319
359
ssize_t sret;
320
intmax_t tmpmax;
321
360
uid_t uid = 65534;
322
361
gid_t gid = 65534;
323
362
bool debug = false;
327
366
.sa_flags = SA_NOCLDSTOP };
328
367
char **custom_argv = NULL;
329
368
int custom_argc = 0;
369
int dir_fd = -1;
330
370
331
371
/* Establish a signal handler */
332
372
sigemptyset(&sigchld_action.sa_mask);
333
373
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
374
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
337
377
goto fallback;
338
378
}
339
379
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
380
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
343
383
goto fallback;
344
384
}
345
385
377
417
.doc = "Group ID the plugins will run as", .group = 3 },
378
418
{ .name = "debug", .key = 132,
379
419
.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 },
380
433
{ .name = NULL }
381
434
};
382
435
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
386
439
switch(key){
440
char *tmp;
441
intmax_t tmp_id;
387
442
case 'g': /* --global-options */
388
if(arg != NULL){
443
{
389
444
char *plugin_option;
390
445
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
446
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
447
break;
397
448
}
398
449
}
450
errno = 0;
399
451
}
400
452
break;
401
453
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
407
456
}
408
457
break;
409
458
case 'o': /* --options-for */
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
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;
420
477
}
421
478
}
479
errno = 0;
422
480
}
423
481
break;
424
482
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
483
{
429
484
char *envdef = strchr(arg, ':');
430
485
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
431
488
break;
432
489
}
433
490
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
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;
436
499
}
437
500
}
438
501
break;
439
502
case 'd': /* --disable */
440
if(arg != NULL){
503
{
441
504
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
444
508
}
445
p->disabled = true;
446
509
}
447
510
break;
448
511
case 'e': /* --enable */
449
if(arg != NULL){
512
{
450
513
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
453
517
}
454
p->disabled = false;
455
518
}
456
519
break;
457
520
case 128: /* --plugin-dir */
458
521
free(plugindir);
459
522
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
523
if(plugindir != NULL){
524
errno = 0;
462
525
}
463
526
break;
464
527
case 129: /* --config-file */
465
528
/* This is already done by parse_opt_config_file() */
466
529
break;
467
530
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
531
tmp_id = strtoimax(arg, &tmp, 10);
470
532
if(errno != 0 or tmp == arg or *tmp != '\0'
471
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
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;
476
537
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
477
540
break;
478
541
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
481
543
if(errno != 0 or tmp == arg or *tmp != '\0'
482
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
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;
487
548
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
488
551
break;
489
552
case 132: /* --debug */
490
553
debug = true;
491
554
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
case -3: /* --usage */
569
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
570
argp_state_help(state, state->out_stream,
571
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
572
case 'V': /* --version */
573
fprintf(state->out_stream, "%s\n", argp_program_version);
574
exit(EXIT_SUCCESS);
575
break;
492
576
/*
493
577
* When adding more options before this line, remember to also add a
494
578
* "case" to the "parse_opt_config_file" function below.
497
581
/* Cryptsetup always passes an argument, which is an empty
498
582
string if "none" was specified in /etc/crypttab. So if
499
583
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
584
if(arg[0] == '\0'){
585
break;
502
586
}
503
break;
504
case ARGP_KEY_END:
505
break;
506
587
default:
507
588
return ARGP_ERR_UNKNOWN;
508
589
}
509
return 0;
590
return errno; /* Set to 0 at start */
510
591
}
511
592
512
593
/* This option parser is the same as parse_opt() above, except it
514
595
error_t parse_opt_config_file(int key, char *arg,
515
596
__attribute__((unused))
516
597
struct argp_state *state){
598
errno = 0;
517
599
switch(key){
518
600
case 'g': /* --global-options */
519
601
case 'G': /* --global-env */
526
608
case 129: /* --config-file */
527
609
free(argfile);
528
610
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
611
if(argfile != NULL){
612
errno = 0;
531
613
}
532
614
break;
533
615
case 130: /* --userid */
534
616
case 131: /* --groupid */
535
617
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
536
622
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
623
break;
539
624
default:
540
625
return ARGP_ERR_UNKNOWN;
541
626
}
542
return 0;
627
return errno;
543
628
}
544
629
545
630
struct argp argp = { .options = options,
549
634
550
635
/* Parse using parse_opt_config_file() in order to get the custom
551
636
config file location, if any. */
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
637
ret = argp_parse(&argp, argc, argv,
638
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
639
NULL, NULL);
640
switch(ret){
641
case 0:
642
break;
643
case ENOMEM:
644
default:
645
errno = ret;
646
error(0, errno, "argp_parse");
647
exitstatus = EX_OSERR;
648
goto fallback;
649
case EINVAL:
650
exitstatus = EX_USAGE;
556
651
goto fallback;
557
652
}
558
653
575
670
custom_argc = 1;
576
671
custom_argv = malloc(sizeof(char*) * 2);
577
672
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
580
675
goto fallback;
581
676
}
582
677
custom_argv[0] = argv[0];
598
693
}
599
694
new_arg = strdup(p);
600
695
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
603
698
free(org_line);
604
699
goto fallback;
605
700
}
606
701
607
702
custom_argc += 1;
608
custom_argv = realloc(custom_argv, sizeof(char *)
609
* ((unsigned int) custom_argc + 1));
610
if(custom_argv == NULL){
611
perror("realloc");
612
exitstatus = EXIT_FAILURE;
613
free(org_line);
614
goto fallback;
703
{
704
char **new_argv = realloc(custom_argv, sizeof(char *)
705
* ((size_t)custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
615
715
}
616
716
custom_argv[custom_argc-1] = new_arg;
617
717
custom_argv[custom_argc] = NULL;
618
718
}
619
719
}
620
do{
720
do {
621
721
ret = fclose(conffp);
622
}while(ret == EOF and errno == EINTR);
722
} while(ret == EOF and errno == EINTR);
623
723
if(ret == EOF){
624
perror("fclose");
625
exitstatus = EXIT_FAILURE;
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
626
726
goto fallback;
627
727
}
628
728
free(org_line);
630
730
/* Check for harmful errors and go to fallback. Other errors might
631
731
not affect opening plugins */
632
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
633
perror("fopen");
634
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
635
735
goto fallback;
636
736
}
637
737
}
638
/* If there was any arguments from configuration file,
639
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
640
740
if(custom_argv != NULL){
641
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
642
0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
646
755
goto fallback;
647
756
}
648
757
}
649
758
650
759
/* Parse actual command line arguments, to let them override the
651
760
config file */
652
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
653
if(ret == ARGP_ERR_UNKNOWN){
654
fprintf(stderr, "Unknown error while parsing arguments\n");
655
exitstatus = EXIT_FAILURE;
656
goto fallback;
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
657
794
}
658
795
659
796
if(debug){
660
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
661
798
fprintf(stderr, "Plugin: %s has %d arguments\n",
662
799
p->name ? p->name : "Global", p->argc - 1);
663
800
for(char **a = p->argv; *a != NULL; a++){
670
807
}
671
808
}
672
809
673
/* Strip permissions down to nobody */
674
setgid(gid);
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<https://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
close(plugindir_fd);
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
675
836
if(ret == -1){
676
perror("setgid");
837
error(0, errno, "setgid");
677
838
}
678
839
ret = setuid(uid);
679
840
if(ret == -1){
680
perror("setuid");
681
}
682
683
if(plugindir == NULL){
684
dir = opendir(PDIR);
685
} else {
686
dir = opendir(plugindir);
687
}
688
689
if(dir == NULL){
690
perror("Could not open plugin dir");
691
exitstatus = EXIT_FAILURE;
692
goto fallback;
693
}
694
695
/* Set the FD_CLOEXEC flag on the directory, if possible */
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
696
845
{
697
int dir_fd = dirfd(dir);
698
if(dir_fd >= 0){
699
ret = set_cloexec_flag(dir_fd);
700
if(ret < 0){
701
perror("set_cloexec_flag");
702
exitstatus = EXIT_FAILURE;
703
goto fallback;
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
704
890
}
705
891
}
892
return 1;
893
}
894
895
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
896
alphasort);
897
if(numplugins == -1){
898
error(0, errno, "Could not scan plugin dir");
899
direntries = NULL;
900
exitstatus = EX_OSERR;
901
goto fallback;
706
902
}
707
903
708
904
FD_ZERO(&rfds_all);
709
905
710
906
/* Read and execute any executable in the plugin directory*/
711
while(true){
712
dirst = readdir(dir);
713
714
/* All directory entries have been processed */
715
if(dirst == NULL){
716
if(errno == EBADF){
717
perror("readdir");
718
exitstatus = EXIT_FAILURE;
719
goto fallback;
720
}
721
break;
722
}
723
724
d_name_len = strlen(dirst->d_name);
725
726
/* Ignore dotfiles, backup files and other junk */
727
{
728
bool bad_name = false;
729
730
const char const *bad_prefixes[] = { ".", "#", NULL };
731
732
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
733
".dpkg-old",
734
".dpkg-bak",
735
".dpkg-divert", NULL };
736
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
737
size_t pre_len = strlen(*pre);
738
if((d_name_len >= pre_len)
739
and strncmp((dirst->d_name), *pre, pre_len) == 0){
740
if(debug){
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad prefix %s\n", dirst->d_name, *pre);
743
}
744
bad_name = true;
745
break;
746
}
747
}
748
if(bad_name){
749
continue;
750
}
751
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
752
size_t suf_len = strlen(*suf);
753
if((d_name_len >= suf_len)
754
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
755
== 0)){
756
if(debug){
757
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
758
" with bad suffix %s\n", dirst->d_name, *suf);
759
}
760
bad_name = true;
761
break;
762
}
763
}
764
765
if(bad_name){
766
continue;
767
}
768
}
769
770
char *filename;
771
if(plugindir == NULL){
772
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
773
} else {
774
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
775
}
776
if(ret < 0){
777
perror("asprintf");
907
for(int i = 0; i < numplugins; i++){
908
909
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
if(plugin_fd == -1){
911
error(0, errno, "Could not open plugin");
912
free(direntries[i]);
778
913
continue;
779
914
}
780
781
ret = stat(filename, &st);
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
782
916
if(ret == -1){
783
perror("stat");
784
free(filename);
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
785
920
continue;
786
921
}
787
922
788
923
/* Ignore non-executable files */
789
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
926
X_OK, 0)) != 0)){
790
927
if(debug){
791
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
792
" with bad type or mode\n", filename);
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR,
931
direntries[i]->d_name);
793
932
}
794
free(filename);
933
close(plugin_fd);
934
free(direntries[i]);
795
935
continue;
796
936
}
797
937
798
plugin *p = getplugin(dirst->d_name);
938
plugin *p = getplugin(direntries[i]->d_name);
799
939
if(p == NULL){
800
perror("getplugin");
801
free(filename);
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
802
943
continue;
803
944
}
804
945
if(p->disabled){
805
946
if(debug){
806
947
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
807
dirst->d_name);
948
direntries[i]->d_name);
808
949
}
809
free(filename);
950
close(plugin_fd);
951
free(direntries[i]);
810
952
continue;
811
953
}
812
954
{
815
957
if(g != NULL){
816
958
for(char **a = g->argv + 1; *a != NULL; a++){
817
959
if(not add_argument(p, *a)){
818
perror("add_argument");
960
error(0, errno, "add_argument");
819
961
}
820
962
}
821
963
/* Add global environment variables */
822
964
for(char **e = g->environ; *e != NULL; e++){
823
965
if(not add_environment(p, *e, false)){
824
perror("add_environment");
966
error(0, errno, "add_environment");
825
967
}
826
968
}
827
969
}
828
970
}
829
/* If this plugin has any environment variables, we will call
830
using execve and need to duplicate the environment from this
831
process, too. */
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
832
973
if(p->environ[0] != NULL){
833
974
for(char **e = environ; *e != NULL; e++){
834
975
if(not add_environment(p, *e, false)){
835
perror("add_environment");
976
error(0, errno, "add_environment");
836
977
}
837
978
}
838
979
}
839
980
840
981
int pipefd[2];
841
ret = pipe(pipefd);
982
#ifndef O_CLOEXEC
983
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
984
#else /* O_CLOEXEC */
985
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
986
#endif /* O_CLOEXEC */
842
987
if(ret == -1){
843
perror("pipe");
844
exitstatus = EXIT_FAILURE;
845
goto fallback;
846
}
988
error(0, errno, "pipe");
989
exitstatus = EX_OSERR;
990
free(direntries[i]);
991
goto fallback;
992
}
993
if(pipefd[0] >= FD_SETSIZE){
994
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
995
FD_SETSIZE);
996
close(pipefd[0]);
997
close(pipefd[1]);
998
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
#ifndef O_CLOEXEC
847
1003
/* Ask OS to automatic close the pipe on exec */
848
1004
ret = set_cloexec_flag(pipefd[0]);
849
1005
if(ret < 0){
850
perror("set_cloexec_flag");
851
exitstatus = EXIT_FAILURE;
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
852
1011
goto fallback;
853
1012
}
854
1013
ret = set_cloexec_flag(pipefd[1]);
855
1014
if(ret < 0){
856
perror("set_cloexec_flag");
857
exitstatus = EXIT_FAILURE;
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
858
1020
goto fallback;
859
1021
}
1022
#endif /* not O_CLOEXEC */
860
1023
/* Block SIGCHLD until process is safely in process list */
861
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1025
&sigchld_action.sa_mask,
1026
NULL));
862
1027
if(ret < 0){
863
perror("sigprocmask");
864
exitstatus = EXIT_FAILURE;
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
865
1031
goto fallback;
866
1032
}
867
1033
/* Starting a new process to be watched */
868
pid_t pid = fork();
1034
pid_t pid;
1035
do {
1036
pid = fork();
1037
} while(pid == -1 and errno == EINTR);
869
1038
if(pid == -1){
870
perror("fork");
871
exitstatus = EXIT_FAILURE;
1039
error(0, errno, "fork");
1040
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1041
&sigchld_action.sa_mask, NULL));
1042
close(pipefd[0]);
1043
close(pipefd[1]);
1044
exitstatus = EX_OSERR;
1045
free(direntries[i]);
872
1046
goto fallback;
873
1047
}
874
1048
if(pid == 0){
875
1049
/* this is the child process */
876
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
877
1051
if(ret < 0){
878
perror("sigaction");
879
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
880
1054
}
881
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
882
1056
if(ret < 0){
883
perror("sigprocmask");
884
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
885
1059
}
886
1060
887
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
888
1062
if(ret == -1){
889
perror("dup2");
890
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
891
1065
}
892
1066
893
if(dirfd(dir) < 0){
894
/* If dir has no file descriptor, we could not set FD_CLOEXEC
895
above and must now close it manually here. */
896
closedir(dir);
897
}
898
if(p->environ[0] == NULL){
899
if(execv(filename, p->argv) < 0){
900
perror("execv");
901
_exit(EXIT_FAILURE);
902
}
903
} else {
904
if(execve(filename, p->argv, p->environ) < 0){
905
perror("execve");
906
_exit(EXIT_FAILURE);
907
}
1067
if(fexecve(plugin_fd, p->argv,
1068
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1069
error(0, errno, "fexecve for %s/%s",
1070
plugindir != NULL ? plugindir : PDIR,
1071
direntries[i]->d_name);
1072
_exit(EX_OSERR);
908
1073
}
909
1074
/* no return */
910
1075
}
911
1076
/* Parent process */
912
1077
close(pipefd[1]); /* Close unused write end of pipe */
913
free(filename);
914
plugin *new_plugin = getplugin(dirst->d_name);
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
915
1080
if(new_plugin == NULL){
916
perror("getplugin");
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1081
error(0, errno, "getplugin");
1082
ret = (int)(TEMP_FAILURE_RETRY
1083
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1084
NULL)));
918
1085
if(ret < 0){
919
perror("sigprocmask");
1086
error(0, errno, "sigprocmask");
920
1087
}
921
exitstatus = EXIT_FAILURE;
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
922
1090
goto fallback;
923
1091
}
1092
free(direntries[i]);
924
1093
925
1094
new_plugin->pid = pid;
926
1095
new_plugin->fd = pipefd[0];
927
1096
928
1097
/* Unblock SIGCHLD so signal handler can be run if this process
929
1098
has already completed */
930
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1099
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1100
&sigchld_action.sa_mask,
1101
NULL));
931
1102
if(ret < 0){
932
perror("sigprocmask");
933
exitstatus = EXIT_FAILURE;
1103
error(0, errno, "sigprocmask");
1104
exitstatus = EX_OSERR;
934
1105
goto fallback;
935
1106
}
936
1107
941
1112
}
942
1113
}
943
1114
944
closedir(dir);
945
dir = NULL;
1115
free(direntries);
1116
direntries = NULL;
1117
close(dir_fd);
1118
dir_fd = -1;
946
1119
free_plugin(getplugin(NULL));
947
1120
948
1121
for(plugin *p = plugin_list; p != NULL; p = p->next){
960
1133
while(plugin_list){
961
1134
fd_set rfds = rfds_all;
962
1135
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
963
if(select_ret == -1){
964
perror("select");
965
exitstatus = EXIT_FAILURE;
1136
if(select_ret == -1 and errno != EINTR){
1137
error(0, errno, "select");
1138
exitstatus = EX_OSERR;
966
1139
goto fallback;
967
1140
}
968
1141
/* OK, now either a process completed, or something can be read
987
1160
(intmax_t) (proc->pid),
988
1161
WTERMSIG(proc->status),
989
1162
strsignal(WTERMSIG(proc->status)));
990
} else if(WCOREDUMP(proc->status)){
991
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
992
" core\n", proc->name, (intmax_t) (proc->pid));
993
1163
}
994
1164
}
995
1165
997
1167
FD_CLR(proc->fd, &rfds_all);
998
1168
999
1169
/* Block signal while modifying process_list */
1000
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1170
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1171
(SIG_BLOCK,
1172
&sigchld_action.sa_mask,
1173
NULL));
1001
1174
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "sigprocmask");
1176
exitstatus = EX_OSERR;
1004
1177
goto fallback;
1005
1178
}
1006
1179
1009
1182
proc = next_plugin;
1010
1183
1011
1184
/* We are done modifying process list, so unblock signal */
1012
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1013
NULL);
1185
ret = (int)(TEMP_FAILURE_RETRY
1186
(sigprocmask(SIG_UNBLOCK,
1187
&sigchld_action.sa_mask, NULL)));
1014
1188
if(ret < 0){
1015
perror("sigprocmask");
1016
exitstatus = EXIT_FAILURE;
1189
error(0, errno, "sigprocmask");
1190
exitstatus = EX_OSERR;
1017
1191
goto fallback;
1018
1192
}
1019
1193
1029
1203
bool bret = print_out_password(proc->buffer,
1030
1204
proc->buffer_length);
1031
1205
if(not bret){
1032
perror("print_out_password");
1033
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "print_out_password");
1207
exitstatus = EX_IOERR;
1034
1208
}
1035
1209
goto fallback;
1036
1210
}
1043
1217
}
1044
1218
/* Before reading, make the process' data buffer large enough */
1045
1219
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1046
proc->buffer = realloc(proc->buffer, proc->buffer_size
1047
+ (size_t) BUFFER_SIZE);
1048
if(proc->buffer == NULL){
1049
perror("malloc");
1050
exitstatus = EXIT_FAILURE;
1220
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1221
+ (size_t) BUFFER_SIZE);
1222
if(new_buffer == NULL){
1223
error(0, errno, "malloc");
1224
exitstatus = EX_OSERR;
1051
1225
goto fallback;
1052
1226
}
1227
proc->buffer = new_buffer;
1053
1228
proc->buffer_size += BUFFER_SIZE;
1054
1229
}
1055
1230
/* Read from the process */
1056
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1057
BUFFER_SIZE);
1231
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1232
proc->buffer
1233
+ proc->buffer_length,
1234
BUFFER_SIZE));
1058
1235
if(sret < 0){
1059
1236
/* Read error from this process; ignore the error */
1060
1237
proc = proc->next;
1072
1249
1073
1250
fallback:
1074
1251
1075
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1253
and exitstatus != EX_OK)){
1076
1254
/* Fallback if all plugins failed, none are found or an error
1077
1255
occured */
1078
1256
bool bret;
1086
1264
}
1087
1265
bret = print_out_password(passwordbuffer, len);
1088
1266
if(not bret){
1089
perror("print_out_password");
1090
exitstatus = EXIT_FAILURE;
1267
error(0, errno, "print_out_password");
1268
exitstatus = EX_IOERR;
1091
1269
}
1092
1270
}
1093
1271
1094
1272
/* Restore old signal handler */
1095
1273
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1096
1274
if(ret == -1){
1097
perror("sigaction");
1098
exitstatus = EXIT_FAILURE;
1275
error(0, errno, "sigaction");
1276
exitstatus = EX_OSERR;
1099
1277
}
1100
1278
1101
1279
if(custom_argv != NULL){
1105
1283
free(custom_argv);
1106
1284
}
1107
1285
1108
if(dir != NULL){
1109
closedir(dir);
1286
free(direntries);
1287
1288
if(dir_fd != -1){
1289
close(dir_fd);
1110
1290
}
1111
1291
1112
1292
/* Kill the processes */
1116
1296
ret = kill(p->pid, SIGTERM);
1117
1297
if(ret == -1 and errno != ESRCH){
1118
1298
/* Set-uid proccesses might not get closed */
1119
perror("kill");
1299
error(0, errno, "kill");
1120
1300
}
1121
1301
}
1122
1302
}
1123
1303
1124
1304
/* Wait for any remaining child processes to terminate */
1125
do{
1305
do {
1126
1306
ret = wait(NULL);
1127
1307
} while(ret >= 0);
1128
1308
if(errno != ECHILD){
1129
perror("wait");
1309
error(0, errno, "wait");
1130
1310
}
1131
1311
1132
1312
free_plugin_list();
1133
1313
1134
1314
free(plugindir);
1315
free(pluginhelperdir);
1135
1316
free(argfile);
1136
1317
1137
1318
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0