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 389
- compare with another revision
- download diff
- download tarball
- view history from revision 389
- Committer: Teddy Hogeborn
- Date: 2009-10-18 08:47:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20091018084740-fa1qgm22lg125r10
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf(), O_CLOEXEC */
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, fdopendir(), 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, fdopendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
67
68
*/
68
69
#include <errno.h> /* errno, EBADF */
69
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
71
76
72
#define BUFFER_SIZE 256
77
73
78
74
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
76
82
77
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
79
85
80
typedef struct plugin{
86
81
char *name; /* can be NULL or any plugin name */
106
101
107
102
/* Gets an existing plugin based on name,
108
103
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
104
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
112
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
107
if((p->name == name)
114
108
or (p->name and name and (strcmp(p->name, name) == 0))){
129
123
copy_name = strdup(name);
130
124
} while(copy_name == NULL and errno == EINTR);
131
125
if(copy_name == NULL){
132
int e = errno;
133
126
free(new_plugin);
134
errno = e;
135
127
return NULL;
136
128
}
137
129
}
145
137
new_plugin->argv = malloc(sizeof(char *) * 2);
146
138
} while(new_plugin->argv == NULL and errno == EINTR);
147
139
if(new_plugin->argv == NULL){
148
int e = errno;
149
140
free(copy_name);
150
141
free(new_plugin);
151
errno = e;
152
142
return NULL;
153
143
}
154
144
new_plugin->argv[0] = copy_name;
158
148
new_plugin->environ = malloc(sizeof(char *));
159
149
} while(new_plugin->environ == NULL and errno == EINTR);
160
150
if(new_plugin->environ == NULL){
161
int e = errno;
162
151
free(copy_name);
163
152
free(new_plugin->argv);
164
153
free(new_plugin);
165
errno = e;
166
154
return NULL;
167
155
}
168
156
new_plugin->environ[0] = NULL;
173
161
}
174
162
175
163
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
164
static bool add_to_char_array(const char *new, char ***array,
178
165
int *len){
179
166
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
167
do {
182
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
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
253
234
/* If reading the flags failed, return error indication now. */
258
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
240
ret | FD_CLOEXEC));
260
241
}
261
#endif /* not O_CLOEXEC */
262
242
263
243
264
244
/* Mark processes as completed when they exit, and save their exit
278
258
/* No child processes */
279
259
break;
280
260
}
281
error(0, errno, "waitpid");
261
perror("waitpid");
282
262
}
283
263
284
264
/* A child exited, find it in process_list */
296
276
}
297
277
298
278
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
279
static bool print_out_password(const char *buffer, size_t length){
301
280
ssize_t ret;
302
281
for(size_t written = 0; written < length; written += (size_t)ret){
310
289
}
311
290
312
291
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
292
static void free_plugin(plugin *plugin_node){
315
293
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
295
free(*arg);
318
296
}
319
free(plugin_node->name);
320
297
free(plugin_node->argv);
321
298
for(char **env = plugin_node->environ; *env != NULL; env++){
322
299
free(*env);
349
326
350
327
int main(int argc, char *argv[]){
351
328
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
353
329
char *argfile = NULL;
354
330
FILE *conffp;
355
struct dirent **direntries = NULL;
331
size_t d_name_len;
332
DIR *dir = NULL;
333
struct dirent *dirst;
356
334
struct stat st;
357
335
fd_set rfds_all;
358
336
int ret, maxfd = 0;
366
344
.sa_flags = SA_NOCLDSTOP };
367
345
char **custom_argv = NULL;
368
346
int custom_argc = 0;
369
int dir_fd = -1;
370
347
371
348
/* Establish a signal handler */
372
349
sigemptyset(&sigchld_action.sa_mask);
373
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
374
351
if(ret == -1){
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
377
354
goto fallback;
378
355
}
379
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
380
357
if(ret == -1){
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
383
360
goto fallback;
384
361
}
385
362
417
394
.doc = "Group ID the plugins will run as", .group = 3 },
418
395
{ .name = "debug", .key = 132,
419
396
.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
397
{ .name = NULL }
434
398
};
435
399
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
439
402
switch(key){
440
403
char *tmp;
441
intmax_t tmp_id;
404
intmax_t tmpmax;
442
405
case 'g': /* --global-options */
443
{
406
if(arg != NULL){
444
407
char *plugin_option;
445
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
446
412
if(not add_argument(getplugin(NULL), plugin_option)){
447
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
448
415
}
449
416
}
450
errno = 0;
451
417
}
452
418
break;
453
419
case 'G': /* --global-env */
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
456
425
}
457
426
break;
458
427
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;
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
477
438
}
478
439
}
479
errno = 0;
480
440
}
481
441
break;
482
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
483
446
{
484
447
char *envdef = strchr(arg, ':');
485
448
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
488
449
break;
489
450
}
490
451
*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;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
499
454
}
500
455
}
501
456
break;
502
457
case 'd': /* --disable */
503
{
458
if(arg != NULL){
504
459
plugin *p = getplugin(arg);
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
508
462
}
463
p->disabled = true;
509
464
}
510
465
break;
511
466
case 'e': /* --enable */
512
{
467
if(arg != NULL){
513
468
plugin *p = getplugin(arg);
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
517
471
}
472
p->disabled = false;
518
473
}
519
474
break;
520
475
case 128: /* --plugin-dir */
521
476
free(plugindir);
522
477
plugindir = strdup(arg);
523
if(plugindir != NULL){
524
errno = 0;
478
if(plugindir == NULL){
479
perror("strdup");
525
480
}
526
481
break;
527
482
case 129: /* --config-file */
528
483
/* This is already done by parse_opt_config_file() */
529
484
break;
530
485
case 130: /* --userid */
531
tmp_id = strtoimax(arg, &tmp, 10);
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
532
488
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;
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
537
494
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
540
495
break;
541
496
case 131: /* --groupid */
542
tmp_id = strtoimax(arg, &tmp, 10);
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
543
499
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;
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
548
505
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
551
506
break;
552
507
case 132: /* --debug */
553
508
debug = true;
554
509
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
510
/*
579
511
* When adding more options before this line, remember to also add a
580
512
* "case" to the "parse_opt_config_file" function below.
583
515
/* Cryptsetup always passes an argument, which is an empty
584
516
string if "none" was specified in /etc/crypttab. So if
585
517
argument was empty, we ignore it silently. */
586
if(arg[0] == '\0'){
587
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
588
520
}
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
521
break;
522
case ARGP_KEY_END:
523
break;
594
524
default:
595
525
return ARGP_ERR_UNKNOWN;
596
526
}
597
return errno; /* Set to 0 at start */
527
return 0;
598
528
}
599
529
600
530
/* This option parser is the same as parse_opt() above, except it
602
532
error_t parse_opt_config_file(int key, char *arg,
603
533
__attribute__((unused))
604
534
struct argp_state *state){
605
errno = 0;
606
535
switch(key){
607
536
case 'g': /* --global-options */
608
537
case 'G': /* --global-env */
615
544
case 129: /* --config-file */
616
545
free(argfile);
617
546
argfile = strdup(arg);
618
if(argfile != NULL){
619
errno = 0;
547
if(argfile == NULL){
548
perror("strdup");
620
549
}
621
550
break;
622
551
case 130: /* --userid */
623
552
case 131: /* --groupid */
624
553
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
case '?': /* --help */
627
case -3: /* --usage */
628
case 'V': /* --version */
629
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
630
556
break;
631
557
default:
632
558
return ARGP_ERR_UNKNOWN;
633
559
}
634
return errno;
560
return 0;
635
561
}
636
562
637
563
struct argp argp = { .options = options,
641
567
642
568
/* Parse using parse_opt_config_file() in order to get the custom
643
569
config file location, if any. */
644
ret = argp_parse(&argp, argc, argv,
645
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
646
NULL, NULL);
647
switch(ret){
648
case 0:
649
break;
650
case ENOMEM:
651
default:
652
errno = ret;
653
error(0, errno, "argp_parse");
654
exitstatus = EX_OSERR;
655
goto fallback;
656
case EINVAL:
657
exitstatus = EX_USAGE;
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
572
fprintf(stderr, "Unknown error while parsing arguments\n");
573
exitstatus = EXIT_FAILURE;
658
574
goto fallback;
659
575
}
660
576
677
593
custom_argc = 1;
678
594
custom_argv = malloc(sizeof(char*) * 2);
679
595
if(custom_argv == NULL){
680
error(0, errno, "malloc");
681
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
682
598
goto fallback;
683
599
}
684
600
custom_argv[0] = argv[0];
700
616
}
701
617
new_arg = strdup(p);
702
618
if(new_arg == NULL){
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
705
621
free(org_line);
706
622
goto fallback;
707
623
}
708
624
709
625
custom_argc += 1;
710
{
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
716
free(new_arg);
717
free(org_line);
718
goto fallback;
719
} else {
720
custom_argv = new_argv;
721
}
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
722
633
}
723
634
custom_argv[custom_argc-1] = new_arg;
724
635
custom_argv[custom_argc] = NULL;
728
639
ret = fclose(conffp);
729
640
} while(ret == EOF and errno == EINTR);
730
641
if(ret == EOF){
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
733
644
goto fallback;
734
645
}
735
646
free(org_line);
737
648
/* Check for harmful errors and go to fallback. Other errors might
738
649
not affect opening plugins */
739
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
742
653
goto fallback;
743
654
}
744
655
}
745
/* If there were any arguments from the configuration file, pass
746
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
747
658
if(custom_argv != NULL){
748
ret = argp_parse(&argp, custom_argc, custom_argv,
749
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
750
NULL, NULL);
751
switch(ret){
752
case 0:
753
break;
754
case ENOMEM:
755
default:
756
errno = ret;
757
error(0, errno, "argp_parse");
758
exitstatus = EX_OSERR;
759
goto fallback;
760
case EINVAL:
761
exitstatus = EX_CONFIG;
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
662
fprintf(stderr, "Unknown error while parsing arguments\n");
663
exitstatus = EXIT_FAILURE;
762
664
goto fallback;
763
665
}
764
666
}
765
667
766
668
/* Parse actual command line arguments, to let them override the
767
669
config file */
768
ret = argp_parse(&argp, argc, argv,
769
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
770
NULL, NULL);
771
switch(ret){
772
case 0:
773
break;
774
case ENOMEM:
775
default:
776
errno = ret;
777
error(0, errno, "argp_parse");
778
exitstatus = EX_OSERR;
779
goto fallback;
780
case EINVAL:
781
exitstatus = EX_USAGE;
782
goto fallback;
783
}
784
785
{
786
char *pluginhelperenv;
787
bool bret = true;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
if(ret != -1){
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
792
}
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
797
}
798
if(ret != -1){
799
free(pluginhelperenv);
800
}
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
801
675
}
802
676
803
677
if(debug){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
805
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
806
680
p->name ? p->name : "Global", p->argc - 1);
807
681
for(char **a = p->argv; *a != NULL; a++){
814
688
}
815
689
}
816
690
817
if(getuid() == 0){
818
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
820
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
if(plugindir_fd == -1){
822
if(errno != ENOENT){
823
error(0, errno, "open(\"" PDIR "\")");
824
}
825
} else {
826
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
827
if(ret == -1){
828
error(0, errno, "fstat");
829
} else {
830
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
831
ret = fchown(plugindir_fd, uid, gid);
832
if(ret == -1){
833
error(0, errno, "fchown");
834
}
835
}
836
}
837
close(plugindir_fd);
838
}
839
}
840
841
/* Lower permissions */
842
ret = setgid(gid);
691
/* Strip permissions down to nobody */
692
setgid(gid);
843
693
if(ret == -1){
844
error(0, errno, "setgid");
694
perror("setgid");
845
695
}
846
696
ret = setuid(uid);
847
697
if(ret == -1){
848
error(0, errno, "setuid");
698
perror("setuid");
849
699
}
850
700
851
701
/* Open plugin directory with close_on_exec flag */
852
702
{
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
854
#ifdef O_CLOEXEC
855
O_CLOEXEC
856
#else /* not O_CLOEXEC */
857
0
858
#endif /* not O_CLOEXEC */
859
);
703
int dir_fd = -1;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
706
#ifdef O_CLOEXEC
707
O_CLOEXEC
708
#else /* not O_CLOEXEC */
709
0
710
#endif /* not O_CLOEXEC */
711
);
712
} else {
713
dir_fd = open(plugindir, O_RDONLY |
714
#ifdef O_CLOEXEC
715
O_CLOEXEC
716
#else /* not O_CLOEXEC */
717
0
718
#endif /* not O_CLOEXEC */
719
);
720
}
860
721
if(dir_fd == -1){
861
error(0, errno, "Could not open plugin dir");
862
exitstatus = EX_UNAVAILABLE;
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
863
724
goto fallback;
864
725
}
865
726
867
728
/* Set the FD_CLOEXEC flag on the directory */
868
729
ret = set_cloexec_flag(dir_fd);
869
730
if(ret < 0){
870
error(0, errno, "set_cloexec_flag");
871
exitstatus = EX_OSERR;
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
872
734
goto fallback;
873
735
}
874
736
#endif /* O_CLOEXEC */
875
}
876
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
881
#ifdef __GNUC__
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
884
#endif
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
887
#ifdef __GNUC__
888
#pragma GCC diagnostic pop
889
#endif
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
891
!= FNM_NOMATCH){
892
if(debug){
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
895
}
896
return 0;
897
}
737
738
dir = fdopendir(dir_fd);
739
if(dir == NULL){
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
743
goto fallback;
898
744
}
899
return 1;
900
}
901
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
903
alphasort);
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
906
direntries = NULL;
907
exitstatus = EX_OSERR;
908
goto fallback;
909
745
}
910
746
911
747
FD_ZERO(&rfds_all);
912
748
913
749
/* Read and execute any executable in the plugin directory*/
914
for(int i = 0; i < numplugins; i++){
915
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
917
if(plugin_fd == -1){
918
error(0, errno, "Could not open plugin");
919
free(direntries[i]);
750
while(true){
751
do {
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
754
755
/* All directory entries have been processed */
756
if(dirst == NULL){
757
if(errno == EBADF){
758
perror("readdir");
759
exitstatus = EXIT_FAILURE;
760
goto fallback;
761
}
762
break;
763
}
764
765
d_name_len = strlen(dirst->d_name);
766
767
/* Ignore dotfiles, backup files and other junk */
768
{
769
bool bad_name = false;
770
771
const char const *bad_prefixes[] = { ".", "#", NULL };
772
773
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
774
".dpkg-old",
775
".dpkg-bak",
776
".dpkg-divert", NULL };
777
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
778
size_t pre_len = strlen(*pre);
779
if((d_name_len >= pre_len)
780
and strncmp((dirst->d_name), *pre, pre_len) == 0){
781
if(debug){
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
" with bad prefix %s\n", dirst->d_name, *pre);
784
}
785
bad_name = true;
786
break;
787
}
788
}
789
if(bad_name){
790
continue;
791
}
792
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
793
size_t suf_len = strlen(*suf);
794
if((d_name_len >= suf_len)
795
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
796
== 0)){
797
if(debug){
798
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
799
" with bad suffix %s\n", dirst->d_name, *suf);
800
}
801
bad_name = true;
802
break;
803
}
804
}
805
806
if(bad_name){
807
continue;
808
}
809
}
810
811
char *filename;
812
if(plugindir == NULL){
813
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
814
dirst->d_name));
815
} else {
816
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
817
plugindir,
818
dirst->d_name));
819
}
820
if(ret < 0){
821
perror("asprintf");
920
822
continue;
921
823
}
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
824
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
923
826
if(ret == -1){
924
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
827
perror("stat");
828
free(filename);
927
829
continue;
928
830
}
929
831
930
832
/* Ignore non-executable files */
931
833
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
934
835
if(debug){
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
837
" with bad type or mode\n", filename);
939
838
}
940
close(plugin_fd);
941
free(direntries[i]);
839
free(filename);
942
840
continue;
943
841
}
944
842
945
plugin *p = getplugin(direntries[i]->d_name);
843
plugin *p = getplugin(dirst->d_name);
946
844
if(p == NULL){
947
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
845
perror("getplugin");
846
free(filename);
950
847
continue;
951
848
}
952
849
if(p->disabled){
953
850
if(debug){
954
851
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
955
direntries[i]->d_name);
852
dirst->d_name);
956
853
}
957
close(plugin_fd);
958
free(direntries[i]);
854
free(filename);
959
855
continue;
960
856
}
961
857
{
964
860
if(g != NULL){
965
861
for(char **a = g->argv + 1; *a != NULL; a++){
966
862
if(not add_argument(p, *a)){
967
error(0, errno, "add_argument");
863
perror("add_argument");
968
864
}
969
865
}
970
866
/* Add global environment variables */
971
867
for(char **e = g->environ; *e != NULL; e++){
972
868
if(not add_environment(p, *e, false)){
973
error(0, errno, "add_environment");
869
perror("add_environment");
974
870
}
975
871
}
976
872
}
977
873
}
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
874
/* If this plugin has any environment variables, we will call
875
using execve and need to duplicate the environment from this
876
process, too. */
980
877
if(p->environ[0] != NULL){
981
878
for(char **e = environ; *e != NULL; e++){
982
879
if(not add_environment(p, *e, false)){
983
error(0, errno, "add_environment");
880
perror("add_environment");
984
881
}
985
882
}
986
883
}
987
884
988
885
int pipefd[2];
989
#ifndef O_CLOEXEC
990
886
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
994
887
if(ret == -1){
995
error(0, errno, "pipe");
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1002
FD_SETSIZE);
1003
close(pipefd[0]);
1004
close(pipefd[1]);
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
1007
goto fallback;
1008
}
1009
#ifndef O_CLOEXEC
888
perror("pipe");
889
exitstatus = EXIT_FAILURE;
890
goto fallback;
891
}
1010
892
/* Ask OS to automatic close the pipe on exec */
1011
893
ret = set_cloexec_flag(pipefd[0]);
1012
894
if(ret < 0){
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
895
perror("set_cloexec_flag");
896
exitstatus = EXIT_FAILURE;
1018
897
goto fallback;
1019
898
}
1020
899
ret = set_cloexec_flag(pipefd[1]);
1021
900
if(ret < 0){
1022
error(0, errno, "set_cloexec_flag");
1023
close(pipefd[0]);
1024
close(pipefd[1]);
1025
exitstatus = EX_OSERR;
1026
free(direntries[i]);
901
perror("set_cloexec_flag");
902
exitstatus = EXIT_FAILURE;
1027
903
goto fallback;
1028
904
}
1029
#endif /* not O_CLOEXEC */
1030
905
/* Block SIGCHLD until process is safely in process list */
1031
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
907
&sigchld_action.sa_mask,
1033
908
NULL));
1034
909
if(ret < 0){
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
910
perror("sigprocmask");
911
exitstatus = EXIT_FAILURE;
1038
912
goto fallback;
1039
913
}
1040
914
/* Starting a new process to be watched */
1043
917
pid = fork();
1044
918
} while(pid == -1 and errno == EINTR);
1045
919
if(pid == -1){
1046
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
920
perror("fork");
921
exitstatus = EXIT_FAILURE;
1053
922
goto fallback;
1054
923
}
1055
924
if(pid == 0){
1056
925
/* this is the child process */
1057
926
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1058
927
if(ret < 0){
1059
error(0, errno, "sigaction");
1060
_exit(EX_OSERR);
928
perror("sigaction");
929
_exit(EXIT_FAILURE);
1061
930
}
1062
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1063
932
if(ret < 0){
1064
error(0, errno, "sigprocmask");
1065
_exit(EX_OSERR);
933
perror("sigprocmask");
934
_exit(EXIT_FAILURE);
1066
935
}
1067
936
1068
937
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1069
938
if(ret == -1){
1070
error(0, errno, "dup2");
1071
_exit(EX_OSERR);
939
perror("dup2");
940
_exit(EXIT_FAILURE);
1072
941
}
1073
942
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
1079
_exit(EX_OSERR);
943
if(dirfd(dir) < 0){
944
/* If dir has no file descriptor, we could not set FD_CLOEXEC
945
above and must now close it manually here. */
946
closedir(dir);
947
}
948
if(p->environ[0] == NULL){
949
if(execv(filename, p->argv) < 0){
950
perror("execv");
951
_exit(EXIT_FAILURE);
952
}
953
} else {
954
if(execve(filename, p->argv, p->environ) < 0){
955
perror("execve");
956
_exit(EXIT_FAILURE);
957
}
1080
958
}
1081
959
/* no return */
1082
960
}
1083
961
/* Parent process */
1084
close(pipefd[1]); /* Close unused write end of pipe */
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
963
pipe */
964
free(filename);
965
plugin *new_plugin = getplugin(dirst->d_name);
1087
966
if(new_plugin == NULL){
1088
error(0, errno, "getplugin");
967
perror("getplugin");
1089
968
ret = (int)(TEMP_FAILURE_RETRY
1090
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1091
970
NULL)));
1092
971
if(ret < 0){
1093
error(0, errno, "sigprocmask");
972
perror("sigprocmask");
1094
973
}
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
974
exitstatus = EXIT_FAILURE;
1097
975
goto fallback;
1098
976
}
1099
free(direntries[i]);
1100
977
1101
978
new_plugin->pid = pid;
1102
979
new_plugin->fd = pipefd[0];
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
980
1109
981
/* Unblock SIGCHLD so signal handler can be run if this process
1110
982
has already completed */
1111
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
984
&sigchld_action.sa_mask,
1113
985
NULL));
1114
986
if(ret < 0){
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
987
perror("sigprocmask");
988
exitstatus = EXIT_FAILURE;
1117
989
goto fallback;
1118
990
}
1119
991
1120
FD_SET(new_plugin->fd, &rfds_all);
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
1121
994
1122
995
if(maxfd < new_plugin->fd){
1123
996
maxfd = new_plugin->fd;
1124
997
}
1125
998
}
1126
999
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
1000
TEMP_FAILURE_RETRY(closedir(dir));
1001
dir = NULL;
1131
1002
free_plugin(getplugin(NULL));
1132
1003
1133
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1146
1017
fd_set rfds = rfds_all;
1147
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1148
1019
if(select_ret == -1 and errno != EINTR){
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
1020
perror("select");
1021
exitstatus = EXIT_FAILURE;
1151
1022
goto fallback;
1152
1023
}
1153
1024
/* OK, now either a process completed, or something can be read
1172
1043
(intmax_t) (proc->pid),
1173
1044
WTERMSIG(proc->status),
1174
1045
strsignal(WTERMSIG(proc->status)));
1046
} else if(WCOREDUMP(proc->status)){
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
1175
1049
}
1176
1050
}
1177
1051
1178
1052
/* Remove the plugin */
1179
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1180
1055
1181
1056
/* Block signal while modifying process_list */
1182
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1184
1059
&sigchld_action.sa_mask,
1185
1060
NULL));
1186
1061
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1062
perror("sigprocmask");
1063
exitstatus = EXIT_FAILURE;
1189
1064
goto fallback;
1190
1065
}
1191
1066
1198
1073
(sigprocmask(SIG_UNBLOCK,
1199
1074
&sigchld_action.sa_mask, NULL)));
1200
1075
if(ret < 0){
1201
error(0, errno, "sigprocmask");
1202
exitstatus = EX_OSERR;
1076
perror("sigprocmask");
1077
exitstatus = EXIT_FAILURE;
1203
1078
goto fallback;
1204
1079
}
1205
1080
1215
1090
bool bret = print_out_password(proc->buffer,
1216
1091
proc->buffer_length);
1217
1092
if(not bret){
1218
error(0, errno, "print_out_password");
1219
exitstatus = EX_IOERR;
1093
perror("print_out_password");
1094
exitstatus = EXIT_FAILURE;
1220
1095
}
1221
1096
goto fallback;
1222
1097
}
1223
1098
1224
1099
/* This process has not completed. Does it have any output? */
1225
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
1226
1103
/* This process had nothing to say at this time */
1227
1104
proc = proc->next;
1228
1105
continue;
1229
1106
}
1230
1107
/* Before reading, make the process' data buffer large enough */
1231
1108
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1232
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1233
+ (size_t) BUFFER_SIZE);
1234
if(new_buffer == NULL){
1235
error(0, errno, "malloc");
1236
exitstatus = EX_OSERR;
1109
proc->buffer = realloc(proc->buffer, proc->buffer_size
1110
+ (size_t) BUFFER_SIZE);
1111
if(proc->buffer == NULL){
1112
perror("malloc");
1113
exitstatus = EXIT_FAILURE;
1237
1114
goto fallback;
1238
1115
}
1239
proc->buffer = new_buffer;
1240
1116
proc->buffer_size += BUFFER_SIZE;
1241
1117
}
1242
1118
/* Read from the process */
1261
1137
1262
1138
fallback:
1263
1139
1264
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1265
and exitstatus != EX_OK)){
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1266
1141
/* Fallback if all plugins failed, none are found or an error
1267
1142
occured */
1268
1143
bool bret;
1276
1151
}
1277
1152
bret = print_out_password(passwordbuffer, len);
1278
1153
if(not bret){
1279
error(0, errno, "print_out_password");
1280
exitstatus = EX_IOERR;
1154
perror("print_out_password");
1155
exitstatus = EXIT_FAILURE;
1281
1156
}
1282
1157
}
1283
1158
1284
1159
/* Restore old signal handler */
1285
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1286
1161
if(ret == -1){
1287
error(0, errno, "sigaction");
1288
exitstatus = EX_OSERR;
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1289
1164
}
1290
1165
1291
1166
if(custom_argv != NULL){
1295
1170
free(custom_argv);
1296
1171
}
1297
1172
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1173
if(dir != NULL){
1174
closedir(dir);
1302
1175
}
1303
1176
1304
1177
/* Kill the processes */
1308
1181
ret = kill(p->pid, SIGTERM);
1309
1182
if(ret == -1 and errno != ESRCH){
1310
1183
/* Set-uid proccesses might not get closed */
1311
error(0, errno, "kill");
1184
perror("kill");
1312
1185
}
1313
1186
}
1314
1187
}
1318
1191
ret = wait(NULL);
1319
1192
} while(ret >= 0);
1320
1193
if(errno != ECHILD){
1321
error(0, errno, "wait");
1194
perror("wait");
1322
1195
}
1323
1196
1324
1197
free_plugin_list();
1325
1198
1326
1199
free(plugindir);
1327
free(pluginhelperdir);
1328
1200
free(argfile);
1329
1201
1330
1202
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0