To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 1100
- compare with another revision
- download diff
- download tarball
- view history from revision 1100
- Committer: Teddy Hogeborn
- Date: 2019-04-09 20:37:18 UTC
- mfrom: (237.4.114 release)
- Revision ID: teddy@recompile.se-20190409203718-2h1z7km2g9kozxaw
Merge from release branch
- files added:
- DBUS-API
- debian/source
- debian/upstream
- 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 © 2008-2018 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
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
277
317
free(*arg);
278
318
}
319
free(plugin_node->name);
279
320
free(plugin_node->argv);
280
321
for(char **env = plugin_node->environ; *env != NULL; env++){
281
322
free(*env);
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;
326
366
.sa_flags = SA_NOCLDSTOP };
327
367
char **custom_argv = NULL;
328
368
int custom_argc = 0;
369
int dir_fd = -1;
329
370
330
371
/* Establish a signal handler */
331
372
sigemptyset(&sigchld_action.sa_mask);
332
373
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
333
374
if(ret == -1){
334
perror("sigaddset");
335
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
336
377
goto fallback;
337
378
}
338
379
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
339
380
if(ret == -1){
340
perror("sigaction");
341
exitstatus = EXIT_FAILURE;
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
342
383
goto fallback;
343
384
}
344
385
376
417
.doc = "Group ID the plugins will run as", .group = 3 },
377
418
{ .name = "debug", .key = 132,
378
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 },
379
433
{ .name = NULL }
380
434
};
381
435
382
error_t parse_opt(int key, char *arg, __attribute__((unused))
383
struct argp_state *state){
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
384
439
switch(key){
385
440
char *tmp;
386
intmax_t tmpmax;
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
__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;
492
578
/*
493
579
* When adding more options before this line, remember to also add a
494
580
* "case" to the "parse_opt_config_file" function below.
497
583
/* Cryptsetup always passes an argument, which is an empty
498
584
string if "none" was specified in /etc/crypttab. So if
499
585
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
586
if(arg[0] == '\0'){
587
break;
502
588
}
503
break;
504
case ARGP_KEY_END:
505
break;
589
/* FALLTHROUGH */
506
590
default:
507
591
return ARGP_ERR_UNKNOWN;
508
592
}
509
return 0;
593
return errno; /* Set to 0 at start */
510
594
}
511
595
512
596
/* This option parser is the same as parse_opt() above, except it
514
598
error_t parse_opt_config_file(int key, char *arg,
515
599
__attribute__((unused))
516
600
struct argp_state *state){
601
errno = 0;
517
602
switch(key){
518
603
case 'g': /* --global-options */
519
604
case 'G': /* --global-env */
526
611
case 129: /* --config-file */
527
612
free(argfile);
528
613
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
614
if(argfile != NULL){
615
errno = 0;
531
616
}
532
617
break;
533
618
case 130: /* --userid */
534
619
case 131: /* --groupid */
535
620
case 132: /* --debug */
621
case 133: /* --plugin-helper-dir */
622
case '?': /* --help */
623
case -3: /* --usage */
624
case 'V': /* --version */
536
625
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
626
break;
539
627
default:
540
628
return ARGP_ERR_UNKNOWN;
541
629
}
542
return 0;
630
return errno;
543
631
}
544
632
545
633
struct argp argp = { .options = options,
549
637
550
638
/* Parse using parse_opt_config_file() in order to get the custom
551
639
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;
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;
556
654
goto fallback;
557
655
}
558
656
575
673
custom_argc = 1;
576
674
custom_argv = malloc(sizeof(char*) * 2);
577
675
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
676
error(0, errno, "malloc");
677
exitstatus = EX_OSERR;
580
678
goto fallback;
581
679
}
582
680
custom_argv[0] = argv[0];
598
696
}
599
697
new_arg = strdup(p);
600
698
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
699
error(0, errno, "strdup");
700
exitstatus = EX_OSERR;
603
701
free(org_line);
604
702
goto fallback;
605
703
}
606
704
607
705
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;
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
}
615
718
}
616
719
custom_argv[custom_argc-1] = new_arg;
617
720
custom_argv[custom_argc] = NULL;
618
721
}
619
722
}
620
do{
723
do {
621
724
ret = fclose(conffp);
622
}while(ret == EOF and errno == EINTR);
725
} while(ret == EOF and errno == EINTR);
623
726
if(ret == EOF){
624
perror("fclose");
625
exitstatus = EXIT_FAILURE;
727
error(0, errno, "fclose");
728
exitstatus = EX_IOERR;
626
729
goto fallback;
627
730
}
628
731
free(org_line);
630
733
/* Check for harmful errors and go to fallback. Other errors might
631
734
not affect opening plugins */
632
735
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
633
perror("fopen");
634
exitstatus = EXIT_FAILURE;
736
error(0, errno, "fopen");
737
exitstatus = EX_OSERR;
635
738
goto fallback;
636
739
}
637
740
}
638
/* If there was any arguments from configuration file,
639
pass them to parser as command arguments */
741
/* If there were any arguments from the configuration file, pass
742
them to parser as command line arguments */
640
743
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;
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;
646
758
goto fallback;
647
759
}
648
760
}
649
761
650
762
/* Parse actual command line arguments, to let them override the
651
763
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;
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
}
657
797
}
658
798
659
799
if(debug){
660
for(plugin *p = plugin_list; p != NULL; p=p->next){
800
for(plugin *p = plugin_list; p != NULL; p = p->next){
661
801
fprintf(stderr, "Plugin: %s has %d arguments\n",
662
802
p->name ? p->name : "Global", p->argc - 1);
663
803
for(char **a = p->argv; *a != NULL; a++){
670
810
}
671
811
}
672
812
673
/* Strip permissions down to nobody */
674
setgid(gid);
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);
675
839
if(ret == -1){
676
perror("setgid");
840
error(0, errno, "setgid");
677
841
}
678
842
ret = setuid(uid);
679
843
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 */
844
error(0, errno, "setuid");
845
}
846
847
/* Open plugin directory with close_on_exec flag */
696
848
{
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;
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;
704
893
}
705
894
}
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;
706
905
}
707
906
708
907
FD_ZERO(&rfds_all);
709
908
710
909
/* 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");
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]);
778
916
continue;
779
917
}
780
781
ret = stat(filename, &st);
918
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
782
919
if(ret == -1){
783
perror("stat");
784
free(filename);
920
error(0, errno, "stat");
921
close(plugin_fd);
922
free(direntries[i]);
785
923
continue;
786
924
}
787
925
788
926
/* Ignore non-executable files */
789
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
if(not S_ISREG(st.st_mode)
928
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
929
X_OK, 0)) != 0)){
790
930
if(debug){
791
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
792
" with bad type or mode\n", filename);
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);
793
935
}
794
free(filename);
936
close(plugin_fd);
937
free(direntries[i]);
795
938
continue;
796
939
}
797
940
798
plugin *p = getplugin(dirst->d_name);
941
plugin *p = getplugin(direntries[i]->d_name);
799
942
if(p == NULL){
800
perror("getplugin");
801
free(filename);
943
error(0, errno, "getplugin");
944
close(plugin_fd);
945
free(direntries[i]);
802
946
continue;
803
947
}
804
948
if(p->disabled){
805
949
if(debug){
806
950
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
807
dirst->d_name);
951
direntries[i]->d_name);
808
952
}
809
free(filename);
953
close(plugin_fd);
954
free(direntries[i]);
810
955
continue;
811
956
}
812
957
{
815
960
if(g != NULL){
816
961
for(char **a = g->argv + 1; *a != NULL; a++){
817
962
if(not add_argument(p, *a)){
818
perror("add_argument");
963
error(0, errno, "add_argument");
819
964
}
820
965
}
821
966
/* Add global environment variables */
822
967
for(char **e = g->environ; *e != NULL; e++){
823
968
if(not add_environment(p, *e, false)){
824
perror("add_environment");
969
error(0, errno, "add_environment");
825
970
}
826
971
}
827
972
}
828
973
}
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. */
974
/* If this plugin has any environment variables, we need to
975
duplicate the environment from this process, too. */
832
976
if(p->environ[0] != NULL){
833
977
for(char **e = environ; *e != NULL; e++){
834
978
if(not add_environment(p, *e, false)){
835
perror("add_environment");
979
error(0, errno, "add_environment");
836
980
}
837
981
}
838
982
}
839
983
840
984
int pipefd[2];
841
ret = pipe(pipefd);
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 */
842
990
if(ret == -1){
843
perror("pipe");
844
exitstatus = EXIT_FAILURE;
845
goto fallback;
846
}
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
847
1006
/* Ask OS to automatic close the pipe on exec */
848
1007
ret = set_cloexec_flag(pipefd[0]);
849
1008
if(ret < 0){
850
perror("set_cloexec_flag");
851
exitstatus = EXIT_FAILURE;
1009
error(0, errno, "set_cloexec_flag");
1010
close(pipefd[0]);
1011
close(pipefd[1]);
1012
exitstatus = EX_OSERR;
1013
free(direntries[i]);
852
1014
goto fallback;
853
1015
}
854
1016
ret = set_cloexec_flag(pipefd[1]);
855
1017
if(ret < 0){
856
perror("set_cloexec_flag");
857
exitstatus = EXIT_FAILURE;
1018
error(0, errno, "set_cloexec_flag");
1019
close(pipefd[0]);
1020
close(pipefd[1]);
1021
exitstatus = EX_OSERR;
1022
free(direntries[i]);
858
1023
goto fallback;
859
1024
}
1025
#endif /* not O_CLOEXEC */
860
1026
/* Block SIGCHLD until process is safely in process list */
861
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1027
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1028
&sigchld_action.sa_mask,
1029
NULL));
862
1030
if(ret < 0){
863
perror("sigprocmask");
864
exitstatus = EXIT_FAILURE;
1031
error(0, errno, "sigprocmask");
1032
exitstatus = EX_OSERR;
1033
free(direntries[i]);
865
1034
goto fallback;
866
1035
}
867
1036
/* Starting a new process to be watched */
868
pid_t pid = fork();
1037
pid_t pid;
1038
do {
1039
pid = fork();
1040
} while(pid == -1 and errno == EINTR);
869
1041
if(pid == -1){
870
perror("fork");
871
exitstatus = EXIT_FAILURE;
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]);
872
1049
goto fallback;
873
1050
}
874
1051
if(pid == 0){
875
1052
/* this is the child process */
876
1053
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
877
1054
if(ret < 0){
878
perror("sigaction");
879
_exit(EXIT_FAILURE);
1055
error(0, errno, "sigaction");
1056
_exit(EX_OSERR);
880
1057
}
881
1058
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
882
1059
if(ret < 0){
883
perror("sigprocmask");
884
_exit(EXIT_FAILURE);
1060
error(0, errno, "sigprocmask");
1061
_exit(EX_OSERR);
885
1062
}
886
1063
887
1064
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
888
1065
if(ret == -1){
889
perror("dup2");
890
_exit(EXIT_FAILURE);
1066
error(0, errno, "dup2");
1067
_exit(EX_OSERR);
891
1068
}
892
1069
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
}
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);
908
1076
}
909
1077
/* no return */
910
1078
}
911
1079
/* Parent process */
912
1080
close(pipefd[1]); /* Close unused write end of pipe */
913
free(filename);
914
plugin *new_plugin = getplugin(dirst->d_name);
1081
close(plugin_fd);
1082
plugin *new_plugin = getplugin(direntries[i]->d_name);
915
1083
if(new_plugin == NULL){
916
perror("getplugin");
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1084
error(0, errno, "getplugin");
1085
ret = (int)(TEMP_FAILURE_RETRY
1086
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1087
NULL)));
918
1088
if(ret < 0){
919
perror("sigprocmask");
1089
error(0, errno, "sigprocmask");
920
1090
}
921
exitstatus = EXIT_FAILURE;
1091
exitstatus = EX_OSERR;
1092
free(direntries[i]);
922
1093
goto fallback;
923
1094
}
1095
free(direntries[i]);
924
1096
925
1097
new_plugin->pid = pid;
926
1098
new_plugin->fd = pipefd[0];
927
1099
1100
if(debug){
1101
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1102
new_plugin->name, (intmax_t) (new_plugin->pid));
1103
}
1104
928
1105
/* Unblock SIGCHLD so signal handler can be run if this process
929
1106
has already completed */
930
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
931
1110
if(ret < 0){
932
perror("sigprocmask");
933
exitstatus = EXIT_FAILURE;
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
934
1113
goto fallback;
935
1114
}
936
1115
941
1120
}
942
1121
}
943
1122
944
closedir(dir);
945
dir = NULL;
1123
free(direntries);
1124
direntries = NULL;
1125
close(dir_fd);
1126
dir_fd = -1;
946
1127
free_plugin(getplugin(NULL));
947
1128
948
1129
for(plugin *p = plugin_list; p != NULL; p = p->next){
960
1141
while(plugin_list){
961
1142
fd_set rfds = rfds_all;
962
1143
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
963
if(select_ret == -1){
964
perror("select");
965
exitstatus = EXIT_FAILURE;
1144
if(select_ret == -1 and errno != EINTR){
1145
error(0, errno, "select");
1146
exitstatus = EX_OSERR;
966
1147
goto fallback;
967
1148
}
968
1149
/* OK, now either a process completed, or something can be read
987
1168
(intmax_t) (proc->pid),
988
1169
WTERMSIG(proc->status),
989
1170
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
1171
}
994
1172
}
995
1173
997
1175
FD_CLR(proc->fd, &rfds_all);
998
1176
999
1177
/* Block signal while modifying process_list */
1000
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1178
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1179
(SIG_BLOCK,
1180
&sigchld_action.sa_mask,
1181
NULL));
1001
1182
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1183
error(0, errno, "sigprocmask");
1184
exitstatus = EX_OSERR;
1004
1185
goto fallback;
1005
1186
}
1006
1187
1009
1190
proc = next_plugin;
1010
1191
1011
1192
/* We are done modifying process list, so unblock signal */
1012
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1013
NULL);
1193
ret = (int)(TEMP_FAILURE_RETRY
1194
(sigprocmask(SIG_UNBLOCK,
1195
&sigchld_action.sa_mask, NULL)));
1014
1196
if(ret < 0){
1015
perror("sigprocmask");
1016
exitstatus = EXIT_FAILURE;
1197
error(0, errno, "sigprocmask");
1198
exitstatus = EX_OSERR;
1017
1199
goto fallback;
1018
1200
}
1019
1201
1029
1211
bool bret = print_out_password(proc->buffer,
1030
1212
proc->buffer_length);
1031
1213
if(not bret){
1032
perror("print_out_password");
1033
exitstatus = EXIT_FAILURE;
1214
error(0, errno, "print_out_password");
1215
exitstatus = EX_IOERR;
1034
1216
}
1035
1217
goto fallback;
1036
1218
}
1043
1225
}
1044
1226
/* Before reading, make the process' data buffer large enough */
1045
1227
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;
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;
1051
1233
goto fallback;
1052
1234
}
1235
proc->buffer = new_buffer;
1053
1236
proc->buffer_size += BUFFER_SIZE;
1054
1237
}
1055
1238
/* Read from the process */
1056
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1057
BUFFER_SIZE);
1239
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1240
proc->buffer
1241
+ proc->buffer_length,
1242
BUFFER_SIZE));
1058
1243
if(sret < 0){
1059
1244
/* Read error from this process; ignore the error */
1060
1245
proc = proc->next;
1072
1257
1073
1258
fallback:
1074
1259
1075
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1260
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1261
and exitstatus != EX_OK)){
1076
1262
/* Fallback if all plugins failed, none are found or an error
1077
1263
occured */
1078
1264
bool bret;
1086
1272
}
1087
1273
bret = print_out_password(passwordbuffer, len);
1088
1274
if(not bret){
1089
perror("print_out_password");
1090
exitstatus = EXIT_FAILURE;
1275
error(0, errno, "print_out_password");
1276
exitstatus = EX_IOERR;
1091
1277
}
1092
1278
}
1093
1279
1094
1280
/* Restore old signal handler */
1095
1281
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1096
1282
if(ret == -1){
1097
perror("sigaction");
1098
exitstatus = EXIT_FAILURE;
1283
error(0, errno, "sigaction");
1284
exitstatus = EX_OSERR;
1099
1285
}
1100
1286
1101
1287
if(custom_argv != NULL){
1105
1291
free(custom_argv);
1106
1292
}
1107
1293
1108
if(dir != NULL){
1109
closedir(dir);
1294
free(direntries);
1295
1296
if(dir_fd != -1){
1297
close(dir_fd);
1110
1298
}
1111
1299
1112
1300
/* Kill the processes */
1116
1304
ret = kill(p->pid, SIGTERM);
1117
1305
if(ret == -1 and errno != ESRCH){
1118
1306
/* Set-uid proccesses might not get closed */
1119
perror("kill");
1307
error(0, errno, "kill");
1120
1308
}
1121
1309
}
1122
1310
}
1123
1311
1124
1312
/* Wait for any remaining child processes to terminate */
1125
do{
1313
do {
1126
1314
ret = wait(NULL);
1127
1315
} while(ret >= 0);
1128
1316
if(errno != ECHILD){
1129
perror("wait");
1317
error(0, errno, "wait");
1130
1318
}
1131
1319
1132
1320
free_plugin_list();
1133
1321
1134
1322
free(plugindir);
1323
free(pluginhelperdir);
1135
1324
free(argfile);
1136
1325
1137
1326
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0