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- Committer: Teddy Hogeborn
- Date: 2020-12-06 12:02:04 UTC
- Revision ID: teddy@recompile.se-20201206120204-pkx839mdn2x2v2m7
Minor code cleanup
* dracut-module/password-agent.c
(test_send_password_to_socket_EMSGSIZE): Replace a free()/malloc()
pair with single realloc() call.
* dracut-module/password-agent.c
(test_send_password_to_socket_EMSGSIZE): Replace a free()/malloc()
pair with single realloc() call.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2020 Teddy Hogeborn
6
* Copyright © 2008-2020 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), 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, 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() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
123
129
copy_name = strdup(name);
124
130
} while(copy_name == NULL and errno == EINTR);
125
131
if(copy_name == NULL){
132
int e = errno;
126
133
free(new_plugin);
134
errno = e;
127
135
return NULL;
128
136
}
129
137
}
137
145
new_plugin->argv = malloc(sizeof(char *) * 2);
138
146
} while(new_plugin->argv == NULL and errno == EINTR);
139
147
if(new_plugin->argv == NULL){
148
int e = errno;
140
149
free(copy_name);
141
150
free(new_plugin);
151
errno = e;
142
152
return NULL;
143
153
}
144
154
new_plugin->argv[0] = copy_name;
148
158
new_plugin->environ = malloc(sizeof(char *));
149
159
} while(new_plugin->environ == NULL and errno == EINTR);
150
160
if(new_plugin->environ == NULL){
161
int e = errno;
151
162
free(copy_name);
152
163
free(new_plugin->argv);
153
164
free(new_plugin);
165
errno = e;
154
166
return NULL;
155
167
}
156
168
new_plugin->environ[0] = NULL;
161
173
}
162
174
163
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
164
177
static bool add_to_char_array(const char *new, char ***array,
165
178
int *len){
166
179
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
167
181
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
182
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
184
sizeof(char *));
185
#else
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
187
/* overflow */
188
new_array = NULL;
189
errno = ENOMEM;
190
} else {
191
new_array = realloc(*array, (size_t)((*len) + 2)
192
* sizeof(char *));
193
}
194
#endif
195
} while(new_array == NULL and errno == EINTR);
171
196
/* Malloc check */
172
if(*array == NULL){
197
if(new_array == NULL){
173
198
return false;
174
199
}
200
*array = new_array;
175
201
/* Make a copy of the new string */
176
202
char *copy;
177
203
do {
189
215
}
190
216
191
217
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
192
219
static bool add_argument(plugin *p, const char *arg){
193
220
if(p == NULL){
194
221
return false;
197
224
}
198
225
199
226
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
200
228
static bool add_environment(plugin *p, const char *def, bool replace){
201
229
if(p == NULL){
202
230
return false;
204
232
/* namelen = length of name of environment variable */
205
233
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
234
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
209
237
/* It already exists */
210
238
if(replace){
211
char *new;
239
char *new_envdef;
212
240
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
216
244
return false;
217
245
}
218
*e = new;
219
strcpy(*e, def);
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
220
248
}
221
249
return true;
222
250
}
224
252
return add_to_char_array(def, &(p->environ), &(p->envc));
225
253
}
226
254
255
#ifndef O_CLOEXEC
227
256
/*
228
257
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
258
* Descriptor Flags".
230
259
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
260
*/
261
__attribute__((warn_unused_result))
232
262
static int set_cloexec_flag(int fd){
233
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
264
/* If reading the flags failed, return error indication now. */
239
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
270
ret | FD_CLOEXEC));
241
271
}
272
#endif /* not O_CLOEXEC */
242
273
243
274
244
275
/* Mark processes as completed when they exit, and save their exit
258
289
/* No child processes */
259
290
break;
260
291
}
261
perror("waitpid");
292
error(0, errno, "waitpid");
262
293
}
263
294
264
295
/* A child exited, find it in process_list */
276
307
}
277
308
278
309
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
279
311
static bool print_out_password(const char *buffer, size_t length){
280
312
ssize_t ret;
281
313
for(size_t written = 0; written < length; written += (size_t)ret){
289
321
}
290
322
291
323
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
292
325
static void free_plugin(plugin *plugin_node){
293
326
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
295
328
free(*arg);
296
329
}
330
free(plugin_node->name);
297
331
free(plugin_node->argv);
298
332
for(char **env = plugin_node->environ; *env != NULL; env++){
299
333
free(*env);
326
360
327
361
int main(int argc, char *argv[]){
328
362
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
329
364
char *argfile = NULL;
330
365
FILE *conffp;
331
size_t d_name_len;
332
DIR *dir = NULL;
333
struct dirent *dirst;
366
struct dirent **direntries = NULL;
334
367
struct stat st;
335
368
fd_set rfds_all;
336
369
int ret, maxfd = 0;
344
377
.sa_flags = SA_NOCLDSTOP };
345
378
char **custom_argv = NULL;
346
379
int custom_argc = 0;
380
int dir_fd = -1;
347
381
348
382
/* Establish a signal handler */
349
383
sigemptyset(&sigchld_action.sa_mask);
350
384
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
351
385
if(ret == -1){
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
354
388
goto fallback;
355
389
}
356
390
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
357
391
if(ret == -1){
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
360
394
goto fallback;
361
395
}
362
396
394
428
.doc = "Group ID the plugins will run as", .group = 3 },
395
429
{ .name = "debug", .key = 132,
396
430
.doc = "Debug mode", .group = 4 },
431
{ .name = "plugin-helper-dir", .key = 133,
432
.arg = "DIRECTORY",
433
.doc = "Specify a different plugin helper directory",
434
.group = 2 },
435
/*
436
* These reproduce what we would get without ARGP_NO_HELP
437
*/
438
{ .name = "help", .key = '?',
439
.doc = "Give this help list", .group = -1 },
440
{ .name = "usage", .key = -3,
441
.doc = "Give a short usage message", .group = -1 },
442
{ .name = "version", .key = 'V',
443
.doc = "Print program version", .group = -1 },
397
444
{ .name = NULL }
398
445
};
399
446
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
402
450
switch(key){
403
451
char *tmp;
404
intmax_t tmpmax;
452
intmax_t tmp_id;
405
453
case 'g': /* --global-options */
406
if(arg != NULL){
454
{
407
455
char *plugin_option;
408
456
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
412
457
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
458
break;
415
459
}
416
460
}
461
errno = 0;
417
462
}
418
463
break;
419
464
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
425
467
}
426
468
break;
427
469
case 'o': /* --options-for */
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;
470
{
471
char *option_list = strchr(arg, ':');
472
if(option_list == NULL){
473
argp_error(state, "No colon in \"%s\"", arg);
474
errno = EINVAL;
475
break;
476
}
477
*option_list = '\0';
478
option_list++;
479
if(arg[0] == '\0'){
480
argp_error(state, "Empty plugin name");
481
errno = EINVAL;
482
break;
483
}
484
char *option;
485
while((option = strsep(&option_list, ",")) != NULL){
486
if(not add_argument(getplugin(arg), option)){
487
break;
438
488
}
439
489
}
490
errno = 0;
440
491
}
441
492
break;
442
493
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
494
{
447
495
char *envdef = strchr(arg, ':');
448
496
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
449
499
break;
450
500
}
451
501
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
502
envdef++;
503
if(arg[0] == '\0'){
504
argp_error(state, "Empty plugin name");
505
errno = EINVAL;
506
break;
507
}
508
if(add_environment(getplugin(arg), envdef, true)){
509
errno = 0;
454
510
}
455
511
}
456
512
break;
457
513
case 'd': /* --disable */
458
if(arg != NULL){
514
{
459
515
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
462
519
}
463
p->disabled = true;
464
520
}
465
521
break;
466
522
case 'e': /* --enable */
467
if(arg != NULL){
523
{
468
524
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
471
528
}
472
p->disabled = false;
473
529
}
474
530
break;
475
531
case 128: /* --plugin-dir */
476
532
free(plugindir);
477
533
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
534
if(plugindir != NULL){
535
errno = 0;
480
536
}
481
537
break;
482
538
case 129: /* --config-file */
483
539
/* This is already done by parse_opt_config_file() */
484
540
break;
485
541
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
488
543
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
544
or tmp_id != (uid_t)tmp_id){
545
argp_error(state, "Bad user ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)uid);
547
break;
494
548
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
495
551
break;
496
552
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
553
tmp_id = strtoimax(arg, &tmp, 10);
499
554
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
555
or tmp_id != (gid_t)tmp_id){
556
argp_error(state, "Bad group ID number: \"%s\", using %"
557
PRIdMAX, arg, (intmax_t)gid);
558
break;
505
559
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
506
562
break;
507
563
case 132: /* --debug */
508
564
debug = true;
509
565
break;
566
case 133: /* --plugin-helper-dir */
567
free(pluginhelperdir);
568
pluginhelperdir = strdup(arg);
569
if(pluginhelperdir != NULL){
570
errno = 0;
571
}
572
break;
573
/*
574
* These reproduce what we would get without ARGP_NO_HELP
575
*/
576
case '?': /* --help */
577
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
case -3: /* --usage */
581
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
argp_state_help(state, state->out_stream,
583
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
case 'V': /* --version */
586
fprintf(state->out_stream, "%s\n", argp_program_version);
587
exit(EXIT_SUCCESS);
588
break;
510
589
/*
511
590
* When adding more options before this line, remember to also add a
512
591
* "case" to the "parse_opt_config_file" function below.
515
594
/* Cryptsetup always passes an argument, which is an empty
516
595
string if "none" was specified in /etc/crypttab. So if
517
596
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
597
if(arg[0] == '\0'){
598
break;
520
599
}
521
break;
522
case ARGP_KEY_END:
523
break;
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
524
605
default:
525
606
return ARGP_ERR_UNKNOWN;
526
607
}
527
return 0;
608
return errno; /* Set to 0 at start */
528
609
}
529
610
530
611
/* This option parser is the same as parse_opt() above, except it
532
613
error_t parse_opt_config_file(int key, char *arg,
533
614
__attribute__((unused))
534
615
struct argp_state *state){
616
errno = 0;
535
617
switch(key){
536
618
case 'g': /* --global-options */
537
619
case 'G': /* --global-env */
544
626
case 129: /* --config-file */
545
627
free(argfile);
546
628
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
629
if(argfile != NULL){
630
errno = 0;
549
631
}
550
632
break;
551
633
case 130: /* --userid */
552
634
case 131: /* --groupid */
553
635
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
554
640
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
641
break;
557
642
default:
558
643
return ARGP_ERR_UNKNOWN;
559
644
}
560
return 0;
645
return errno;
561
646
}
562
647
563
648
struct argp argp = { .options = options,
567
652
568
653
/* Parse using parse_opt_config_file() in order to get the custom
569
654
config file location, if any. */
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;
655
ret = argp_parse(&argp, argc, argv,
656
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
657
NULL, NULL);
658
switch(ret){
659
case 0:
660
break;
661
case ENOMEM:
662
default:
663
errno = ret;
664
error(0, errno, "argp_parse");
665
exitstatus = EX_OSERR;
666
goto fallback;
667
case EINVAL:
668
exitstatus = EX_USAGE;
574
669
goto fallback;
575
670
}
576
671
593
688
custom_argc = 1;
594
689
custom_argv = malloc(sizeof(char*) * 2);
595
690
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
598
693
goto fallback;
599
694
}
600
695
custom_argv[0] = argv[0];
616
711
}
617
712
new_arg = strdup(p);
618
713
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
621
716
free(org_line);
622
717
goto fallback;
623
718
}
624
719
625
720
custom_argc += 1;
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;
721
{
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
724
sizeof(char *));
725
#else
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
728
/* overflow */
729
errno = ENOMEM;
730
} else {
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
732
* sizeof(char *));
733
}
734
#endif
735
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
737
exitstatus = EX_OSERR;
738
free(new_arg);
739
free(org_line);
740
goto fallback;
741
} else {
742
custom_argv = new_argv;
743
}
633
744
}
634
745
custom_argv[custom_argc-1] = new_arg;
635
746
custom_argv[custom_argc] = NULL;
639
750
ret = fclose(conffp);
640
751
} while(ret == EOF and errno == EINTR);
641
752
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
644
755
goto fallback;
645
756
}
646
757
free(org_line);
648
759
/* Check for harmful errors and go to fallback. Other errors might
649
760
not affect opening plugins */
650
761
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
653
764
goto fallback;
654
765
}
655
766
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
658
769
if(custom_argv != NULL){
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;
770
ret = argp_parse(&argp, custom_argc, custom_argv,
771
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
772
NULL, NULL);
773
switch(ret){
774
case 0:
775
break;
776
case ENOMEM:
777
default:
778
errno = ret;
779
error(0, errno, "argp_parse");
780
exitstatus = EX_OSERR;
781
goto fallback;
782
case EINVAL:
783
exitstatus = EX_CONFIG;
664
784
goto fallback;
665
785
}
666
786
}
667
787
668
788
/* Parse actual command line arguments, to let them override the
669
789
config file */
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;
790
ret = argp_parse(&argp, argc, argv,
791
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
792
NULL, NULL);
793
switch(ret){
794
case 0:
795
break;
796
case ENOMEM:
797
default:
798
errno = ret;
799
error(0, errno, "argp_parse");
800
exitstatus = EX_OSERR;
801
goto fallback;
802
case EINVAL:
803
exitstatus = EX_USAGE;
804
goto fallback;
805
}
806
807
{
808
char *pluginhelperenv;
809
bool bret = true;
810
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
811
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
812
if(ret != -1){
813
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
814
}
815
if(ret == -1 or not bret){
816
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
817
" environment variable to \"%s\" for all plugins\n",
818
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
819
}
820
if(ret != -1){
821
free(pluginhelperenv);
822
}
675
823
}
676
824
677
825
if(debug){
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
679
827
fprintf(stderr, "Plugin: %s has %d arguments\n",
680
828
p->name ? p->name : "Global", p->argc - 1);
681
829
for(char **a = p->argv; *a != NULL; a++){
688
836
}
689
837
}
690
838
691
/* Strip permissions down to nobody */
692
setgid(gid);
839
if(getuid() == 0){
840
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
842
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
if(plugindir_fd == -1){
844
if(errno != ENOENT){
845
error(0, errno, "open(\"" PDIR "\")");
846
}
847
} else {
848
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
849
if(ret == -1){
850
error(0, errno, "fstat");
851
} else {
852
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
853
ret = fchown(plugindir_fd, uid, gid);
854
if(ret == -1){
855
error(0, errno, "fchown");
856
}
857
}
858
}
859
close(plugindir_fd);
860
}
861
}
862
863
/* Lower permissions */
864
ret = setgid(gid);
693
865
if(ret == -1){
694
perror("setgid");
866
error(0, errno, "setgid");
695
867
}
696
868
ret = setuid(uid);
697
869
if(ret == -1){
698
perror("setuid");
870
error(0, errno, "setuid");
699
871
}
700
872
701
873
/* Open plugin directory with close_on_exec flag */
702
874
{
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
}
875
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
876
#ifdef O_CLOEXEC
877
O_CLOEXEC
878
#else /* not O_CLOEXEC */
879
0
880
#endif /* not O_CLOEXEC */
881
);
721
882
if(dir_fd == -1){
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
883
error(0, errno, "Could not open plugin dir");
884
exitstatus = EX_UNAVAILABLE;
724
885
goto fallback;
725
886
}
726
887
728
889
/* Set the FD_CLOEXEC flag on the directory */
729
890
ret = set_cloexec_flag(dir_fd);
730
891
if(ret < 0){
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
892
error(0, errno, "set_cloexec_flag");
893
exitstatus = EX_OSERR;
734
894
goto fallback;
735
895
}
736
896
#endif /* O_CLOEXEC */
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;
897
}
898
899
int good_name(const struct dirent * const dirent){
900
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
901
"*.dpkg-old", "*.dpkg-bak",
902
"*.dpkg-divert", NULL };
903
#ifdef __GNUC__
904
#pragma GCC diagnostic push
905
#pragma GCC diagnostic ignored "-Wcast-qual"
906
#endif
907
for(const char **pat = (const char **)patterns;
908
*pat != NULL; pat++){
909
#ifdef __GNUC__
910
#pragma GCC diagnostic pop
911
#endif
912
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
913
!= FNM_NOMATCH){
914
if(debug){
915
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
916
" matching pattern %s\n", dirent->d_name, *pat);
917
}
918
return 0;
919
}
744
920
}
921
return 1;
922
}
923
924
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
925
alphasort);
926
if(numplugins == -1){
927
error(0, errno, "Could not scan plugin dir");
928
direntries = NULL;
929
exitstatus = EX_OSERR;
930
goto fallback;
745
931
}
746
932
747
933
FD_ZERO(&rfds_all);
748
934
749
935
/* Read and execute any executable in the plugin directory*/
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");
936
for(int i = 0; i < numplugins; i++){
937
938
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
939
if(plugin_fd == -1){
940
error(0, errno, "Could not open plugin");
941
free(direntries[i]);
822
942
continue;
823
943
}
824
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
826
945
if(ret == -1){
827
perror("stat");
828
free(filename);
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
829
949
continue;
830
950
}
831
951
832
952
/* Ignore non-executable files */
833
953
if(not S_ISREG(st.st_mode)
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
835
956
if(debug){
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
837
" with bad type or mode\n", filename);
957
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
958
" with bad type or mode\n",
959
plugindir != NULL ? plugindir : PDIR,
960
direntries[i]->d_name);
838
961
}
839
free(filename);
962
close(plugin_fd);
963
free(direntries[i]);
840
964
continue;
841
965
}
842
966
843
plugin *p = getplugin(dirst->d_name);
967
plugin *p = getplugin(direntries[i]->d_name);
844
968
if(p == NULL){
845
perror("getplugin");
846
free(filename);
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
847
972
continue;
848
973
}
849
974
if(p->disabled){
850
975
if(debug){
851
976
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
852
dirst->d_name);
977
direntries[i]->d_name);
853
978
}
854
free(filename);
979
close(plugin_fd);
980
free(direntries[i]);
855
981
continue;
856
982
}
857
983
{
860
986
if(g != NULL){
861
987
for(char **a = g->argv + 1; *a != NULL; a++){
862
988
if(not add_argument(p, *a)){
863
perror("add_argument");
989
error(0, errno, "add_argument");
864
990
}
865
991
}
866
992
/* Add global environment variables */
867
993
for(char **e = g->environ; *e != NULL; e++){
868
994
if(not add_environment(p, *e, false)){
869
perror("add_environment");
995
error(0, errno, "add_environment");
870
996
}
871
997
}
872
998
}
873
999
}
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. */
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
877
1002
if(p->environ[0] != NULL){
878
1003
for(char **e = environ; *e != NULL; e++){
879
1004
if(not add_environment(p, *e, false)){
880
perror("add_environment");
1005
error(0, errno, "add_environment");
881
1006
}
882
1007
}
883
1008
}
884
1009
885
1010
int pipefd[2];
1011
#ifndef O_CLOEXEC
886
1012
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1013
#else /* O_CLOEXEC */
1014
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1015
#endif /* O_CLOEXEC */
887
1016
if(ret == -1){
888
perror("pipe");
889
exitstatus = EXIT_FAILURE;
890
goto fallback;
891
}
1017
error(0, errno, "pipe");
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
goto fallback;
1021
}
1022
if(pipefd[0] >= FD_SETSIZE){
1023
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1024
FD_SETSIZE);
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
#ifndef O_CLOEXEC
892
1032
/* Ask OS to automatic close the pipe on exec */
893
1033
ret = set_cloexec_flag(pipefd[0]);
894
1034
if(ret < 0){
895
perror("set_cloexec_flag");
896
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
897
1040
goto fallback;
898
1041
}
899
1042
ret = set_cloexec_flag(pipefd[1]);
900
1043
if(ret < 0){
901
perror("set_cloexec_flag");
902
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
903
1049
goto fallback;
904
1050
}
1051
#endif /* not O_CLOEXEC */
905
1052
/* Block SIGCHLD until process is safely in process list */
906
1053
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
907
1054
&sigchld_action.sa_mask,
908
1055
NULL));
909
1056
if(ret < 0){
910
perror("sigprocmask");
911
exitstatus = EXIT_FAILURE;
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
912
1060
goto fallback;
913
1061
}
914
1062
/* Starting a new process to be watched */
917
1065
pid = fork();
918
1066
} while(pid == -1 and errno == EINTR);
919
1067
if(pid == -1){
920
perror("fork");
921
exitstatus = EXIT_FAILURE;
1068
error(0, errno, "fork");
1069
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1070
&sigchld_action.sa_mask, NULL));
1071
close(pipefd[0]);
1072
close(pipefd[1]);
1073
exitstatus = EX_OSERR;
1074
free(direntries[i]);
922
1075
goto fallback;
923
1076
}
924
1077
if(pid == 0){
925
1078
/* this is the child process */
926
1079
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
927
1080
if(ret < 0){
928
perror("sigaction");
929
_exit(EXIT_FAILURE);
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
930
1083
}
931
1084
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
932
1085
if(ret < 0){
933
perror("sigprocmask");
934
_exit(EXIT_FAILURE);
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
935
1088
}
936
1089
937
1090
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
938
1091
if(ret == -1){
939
perror("dup2");
940
_exit(EXIT_FAILURE);
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
941
1094
}
942
1095
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
}
1096
if(fexecve(plugin_fd, p->argv,
1097
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1098
error(0, errno, "fexecve for %s/%s",
1099
plugindir != NULL ? plugindir : PDIR,
1100
direntries[i]->d_name);
1101
_exit(EX_OSERR);
958
1102
}
959
1103
/* no return */
960
1104
}
961
1105
/* Parent process */
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);
1106
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
966
1109
if(new_plugin == NULL){
967
perror("getplugin");
1110
error(0, errno, "getplugin");
968
1111
ret = (int)(TEMP_FAILURE_RETRY
969
1112
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
970
1113
NULL)));
971
1114
if(ret < 0){
972
perror("sigprocmask");
1115
error(0, errno, "sigprocmask");
973
1116
}
974
exitstatus = EXIT_FAILURE;
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
975
1119
goto fallback;
976
1120
}
1121
free(direntries[i]);
977
1122
978
1123
new_plugin->pid = pid;
979
1124
new_plugin->fd = pipefd[0];
980
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
981
1131
/* Unblock SIGCHLD so signal handler can be run if this process
982
1132
has already completed */
983
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
984
1134
&sigchld_action.sa_mask,
985
1135
NULL));
986
1136
if(ret < 0){
987
perror("sigprocmask");
988
exitstatus = EXIT_FAILURE;
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
989
1139
goto fallback;
990
1140
}
991
1141
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
1142
FD_SET(new_plugin->fd, &rfds_all);
994
1143
995
1144
if(maxfd < new_plugin->fd){
996
1145
maxfd = new_plugin->fd;
997
1146
}
998
1147
}
999
1148
1000
TEMP_FAILURE_RETRY(closedir(dir));
1001
dir = NULL;
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
1002
1153
free_plugin(getplugin(NULL));
1003
1154
1004
1155
for(plugin *p = plugin_list; p != NULL; p = p->next){
1017
1168
fd_set rfds = rfds_all;
1018
1169
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1019
1170
if(select_ret == -1 and errno != EINTR){
1020
perror("select");
1021
exitstatus = EXIT_FAILURE;
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
1022
1173
goto fallback;
1023
1174
}
1024
1175
/* OK, now either a process completed, or something can be read
1043
1194
(intmax_t) (proc->pid),
1044
1195
WTERMSIG(proc->status),
1045
1196
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));
1049
1197
}
1050
1198
}
1051
1199
1052
1200
/* Remove the plugin */
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1201
FD_CLR(proc->fd, &rfds_all);
1055
1202
1056
1203
/* Block signal while modifying process_list */
1057
1204
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1059
1206
&sigchld_action.sa_mask,
1060
1207
NULL));
1061
1208
if(ret < 0){
1062
perror("sigprocmask");
1063
exitstatus = EXIT_FAILURE;
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
1064
1211
goto fallback;
1065
1212
}
1066
1213
1073
1220
(sigprocmask(SIG_UNBLOCK,
1074
1221
&sigchld_action.sa_mask, NULL)));
1075
1222
if(ret < 0){
1076
perror("sigprocmask");
1077
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1078
1225
goto fallback;
1079
1226
}
1080
1227
1090
1237
bool bret = print_out_password(proc->buffer,
1091
1238
proc->buffer_length);
1092
1239
if(not bret){
1093
perror("print_out_password");
1094
exitstatus = EXIT_FAILURE;
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1095
1242
}
1096
1243
goto fallback;
1097
1244
}
1098
1245
1099
1246
/* This process has not completed. Does it have any output? */
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
1247
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1103
1248
/* This process had nothing to say at this time */
1104
1249
proc = proc->next;
1105
1250
continue;
1106
1251
}
1107
1252
/* Before reading, make the process' data buffer large enough */
1108
1253
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
1254
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1255
+ (size_t) BUFFER_SIZE);
1256
if(new_buffer == NULL){
1257
error(0, errno, "malloc");
1258
exitstatus = EX_OSERR;
1114
1259
goto fallback;
1115
1260
}
1261
proc->buffer = new_buffer;
1116
1262
proc->buffer_size += BUFFER_SIZE;
1117
1263
}
1118
1264
/* Read from the process */
1137
1283
1138
1284
fallback:
1139
1285
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1141
1288
/* Fallback if all plugins failed, none are found or an error
1142
1289
occured */
1143
1290
bool bret;
1151
1298
}
1152
1299
bret = print_out_password(passwordbuffer, len);
1153
1300
if(not bret){
1154
perror("print_out_password");
1155
exitstatus = EXIT_FAILURE;
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1156
1303
}
1157
1304
}
1158
1305
1159
1306
/* Restore old signal handler */
1160
1307
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1161
1308
if(ret == -1){
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1164
1311
}
1165
1312
1166
1313
if(custom_argv != NULL){
1170
1317
free(custom_argv);
1171
1318
}
1172
1319
1173
if(dir != NULL){
1174
closedir(dir);
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1175
1324
}
1176
1325
1177
1326
/* Kill the processes */
1181
1330
ret = kill(p->pid, SIGTERM);
1182
1331
if(ret == -1 and errno != ESRCH){
1183
1332
/* Set-uid proccesses might not get closed */
1184
perror("kill");
1333
error(0, errno, "kill");
1185
1334
}
1186
1335
}
1187
1336
}
1191
1340
ret = wait(NULL);
1192
1341
} while(ret >= 0);
1193
1342
if(errno != ECHILD){
1194
perror("wait");
1343
error(0, errno, "wait");
1195
1344
}
1196
1345
1197
1346
free_plugin_list();
1198
1347
1199
1348
free(plugindir);
1349
free(pluginhelperdir);
1200
1350
free(argfile);
1201
1351
1202
1352
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0