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- Committer: Teddy Hogeborn
- Date: 2009-09-23 20:31:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20090923203147-mbs7klc1tugrrdwf
* mandos (Client.__init__): Open "secfile" file in binary mode.
- 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(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
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
#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);
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
196
171
/* Malloc check */
197
if(new_array == NULL){
172
if(*array == NULL){
198
173
return false;
199
174
}
200
*array = new_array;
201
175
/* Make a copy of the new string */
202
176
char *copy;
203
177
do {
215
189
}
216
190
217
191
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
219
192
static bool add_argument(plugin *p, const char *arg){
220
193
if(p == NULL){
221
194
return false;
224
197
}
225
198
226
199
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
228
200
static bool add_environment(plugin *p, const char *def, bool replace){
229
201
if(p == NULL){
230
202
return false;
232
204
/* namelen = length of name of environment variable */
233
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
234
206
/* Search for this environment variable */
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
237
209
/* It already exists */
238
210
if(replace){
239
char *new_envdef;
211
char *new;
240
212
do {
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
244
216
return false;
245
217
}
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
248
220
}
249
221
return true;
250
222
}
252
224
return add_to_char_array(def, &(p->environ), &(p->envc));
253
225
}
254
226
255
#ifndef O_CLOEXEC
256
227
/*
257
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
258
229
* Descriptor Flags".
259
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
260
231
*/
261
__attribute__((warn_unused_result))
262
232
static int set_cloexec_flag(int fd){
263
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
264
234
/* If reading the flags failed, return error indication now. */
269
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
240
ret | FD_CLOEXEC));
271
241
}
272
#endif /* not O_CLOEXEC */
273
242
274
243
275
244
/* Mark processes as completed when they exit, and save their exit
289
258
/* No child processes */
290
259
break;
291
260
}
292
error(0, errno, "waitpid");
261
perror("waitpid");
293
262
}
294
263
295
264
/* A child exited, find it in process_list */
307
276
}
308
277
309
278
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
311
279
static bool print_out_password(const char *buffer, size_t length){
312
280
ssize_t ret;
313
281
for(size_t written = 0; written < length; written += (size_t)ret){
321
289
}
322
290
323
291
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
325
292
static void free_plugin(plugin *plugin_node){
326
293
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
328
295
free(*arg);
329
296
}
330
free(plugin_node->name);
331
297
free(plugin_node->argv);
332
298
for(char **env = plugin_node->environ; *env != NULL; env++){
333
299
free(*env);
360
326
361
327
int main(int argc, char *argv[]){
362
328
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
364
329
char *argfile = NULL;
365
330
FILE *conffp;
366
struct dirent **direntries = NULL;
331
size_t d_name_len;
332
DIR *dir = NULL;
333
struct dirent *dirst;
367
334
struct stat st;
368
335
fd_set rfds_all;
369
336
int ret, maxfd = 0;
377
344
.sa_flags = SA_NOCLDSTOP };
378
345
char **custom_argv = NULL;
379
346
int custom_argc = 0;
380
int dir_fd = -1;
381
347
382
348
/* Establish a signal handler */
383
349
sigemptyset(&sigchld_action.sa_mask);
384
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
385
351
if(ret == -1){
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
388
354
goto fallback;
389
355
}
390
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
391
357
if(ret == -1){
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
394
360
goto fallback;
395
361
}
396
362
428
394
.doc = "Group ID the plugins will run as", .group = 3 },
429
395
{ .name = "debug", .key = 132,
430
396
.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 },
444
397
{ .name = NULL }
445
398
};
446
399
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
450
402
switch(key){
451
403
char *tmp;
452
intmax_t tmp_id;
404
intmax_t tmpmax;
453
405
case 'g': /* --global-options */
454
{
406
if(arg != NULL){
455
407
char *plugin_option;
456
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
457
412
if(not add_argument(getplugin(NULL), plugin_option)){
458
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
459
415
}
460
416
}
461
errno = 0;
462
417
}
463
418
break;
464
419
case 'G': /* --global-env */
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
467
425
}
468
426
break;
469
427
case 'o': /* --options-for */
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;
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;
488
438
}
489
439
}
490
errno = 0;
491
440
}
492
441
break;
493
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
494
446
{
495
447
char *envdef = strchr(arg, ':');
496
448
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
499
449
break;
500
450
}
501
451
*envdef = '\0';
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;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
510
454
}
511
455
}
512
456
break;
513
457
case 'd': /* --disable */
514
{
458
if(arg != NULL){
515
459
plugin *p = getplugin(arg);
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
519
462
}
463
p->disabled = true;
520
464
}
521
465
break;
522
466
case 'e': /* --enable */
523
{
467
if(arg != NULL){
524
468
plugin *p = getplugin(arg);
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
528
471
}
472
p->disabled = false;
529
473
}
530
474
break;
531
475
case 128: /* --plugin-dir */
532
476
free(plugindir);
533
477
plugindir = strdup(arg);
534
if(plugindir != NULL){
535
errno = 0;
478
if(plugindir == NULL){
479
perror("strdup");
536
480
}
537
481
break;
538
482
case 129: /* --config-file */
539
483
/* This is already done by parse_opt_config_file() */
540
484
break;
541
485
case 130: /* --userid */
542
tmp_id = strtoimax(arg, &tmp, 10);
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
543
488
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
548
494
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
551
495
break;
552
496
case 131: /* --groupid */
553
tmp_id = strtoimax(arg, &tmp, 10);
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
554
499
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
559
505
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
562
506
break;
563
507
case 132: /* --debug */
564
508
debug = true;
565
509
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;
589
510
/*
590
511
* When adding more options before this line, remember to also add a
591
512
* "case" to the "parse_opt_config_file" function below.
594
515
/* Cryptsetup always passes an argument, which is an empty
595
516
string if "none" was specified in /etc/crypttab. So if
596
517
argument was empty, we ignore it silently. */
597
if(arg[0] == '\0'){
598
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
599
520
}
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
521
break;
522
case ARGP_KEY_END:
523
break;
605
524
default:
606
525
return ARGP_ERR_UNKNOWN;
607
526
}
608
return errno; /* Set to 0 at start */
527
return 0;
609
528
}
610
529
611
530
/* This option parser is the same as parse_opt() above, except it
613
532
error_t parse_opt_config_file(int key, char *arg,
614
533
__attribute__((unused))
615
534
struct argp_state *state){
616
errno = 0;
617
535
switch(key){
618
536
case 'g': /* --global-options */
619
537
case 'G': /* --global-env */
626
544
case 129: /* --config-file */
627
545
free(argfile);
628
546
argfile = strdup(arg);
629
if(argfile != NULL){
630
errno = 0;
547
if(argfile == NULL){
548
perror("strdup");
631
549
}
632
550
break;
633
551
case 130: /* --userid */
634
552
case 131: /* --groupid */
635
553
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
640
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
641
556
break;
642
557
default:
643
558
return ARGP_ERR_UNKNOWN;
644
559
}
645
return errno;
560
return 0;
646
561
}
647
562
648
563
struct argp argp = { .options = options,
652
567
653
568
/* Parse using parse_opt_config_file() in order to get the custom
654
569
config file location, if any. */
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;
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;
669
574
goto fallback;
670
575
}
671
576
688
593
custom_argc = 1;
689
594
custom_argv = malloc(sizeof(char*) * 2);
690
595
if(custom_argv == NULL){
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
693
598
goto fallback;
694
599
}
695
600
custom_argv[0] = argv[0];
711
616
}
712
617
new_arg = strdup(p);
713
618
if(new_arg == NULL){
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
716
621
free(org_line);
717
622
goto fallback;
718
623
}
719
624
720
625
custom_argc += 1;
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
}
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;
744
633
}
745
634
custom_argv[custom_argc-1] = new_arg;
746
635
custom_argv[custom_argc] = NULL;
750
639
ret = fclose(conffp);
751
640
} while(ret == EOF and errno == EINTR);
752
641
if(ret == EOF){
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
755
644
goto fallback;
756
645
}
757
646
free(org_line);
759
648
/* Check for harmful errors and go to fallback. Other errors might
760
649
not affect opening plugins */
761
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
764
653
goto fallback;
765
654
}
766
655
}
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
769
658
if(custom_argv != NULL){
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;
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;
784
664
goto fallback;
785
665
}
786
666
}
787
667
788
668
/* Parse actual command line arguments, to let them override the
789
669
config file */
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
}
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;
823
675
}
824
676
825
677
if(debug){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
827
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
828
680
p->name ? p->name : "Global", p->argc - 1);
829
681
for(char **a = p->argv; *a != NULL; a++){
836
688
}
837
689
}
838
690
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);
691
/* Strip permissions down to nobody */
692
setgid(gid);
865
693
if(ret == -1){
866
error(0, errno, "setgid");
694
perror("setgid");
867
695
}
868
696
ret = setuid(uid);
869
697
if(ret == -1){
870
error(0, errno, "setuid");
698
perror("setuid");
871
699
}
872
700
873
701
/* Open plugin directory with close_on_exec flag */
874
702
{
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
);
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
}
882
721
if(dir_fd == -1){
883
error(0, errno, "Could not open plugin dir");
884
exitstatus = EX_UNAVAILABLE;
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
885
724
goto fallback;
886
725
}
887
726
889
728
/* Set the FD_CLOEXEC flag on the directory */
890
729
ret = set_cloexec_flag(dir_fd);
891
730
if(ret < 0){
892
error(0, errno, "set_cloexec_flag");
893
exitstatus = EX_OSERR;
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
894
734
goto fallback;
895
735
}
896
736
#endif /* O_CLOEXEC */
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
}
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;
920
744
}
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;
931
745
}
932
746
933
747
FD_ZERO(&rfds_all);
934
748
935
749
/* Read and execute any executable in the plugin directory*/
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]);
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");
942
822
continue;
943
823
}
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
824
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
945
826
if(ret == -1){
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
827
perror("stat");
828
free(filename);
949
829
continue;
950
830
}
951
831
952
832
/* Ignore non-executable files */
953
833
if(not S_ISREG(st.st_mode)
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
956
835
if(debug){
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);
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
837
" with bad type or mode\n", filename);
961
838
}
962
close(plugin_fd);
963
free(direntries[i]);
839
free(filename);
964
840
continue;
965
841
}
966
842
967
plugin *p = getplugin(direntries[i]->d_name);
843
plugin *p = getplugin(dirst->d_name);
968
844
if(p == NULL){
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
845
perror("getplugin");
846
free(filename);
972
847
continue;
973
848
}
974
849
if(p->disabled){
975
850
if(debug){
976
851
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
977
direntries[i]->d_name);
852
dirst->d_name);
978
853
}
979
close(plugin_fd);
980
free(direntries[i]);
854
free(filename);
981
855
continue;
982
856
}
983
857
{
986
860
if(g != NULL){
987
861
for(char **a = g->argv + 1; *a != NULL; a++){
988
862
if(not add_argument(p, *a)){
989
error(0, errno, "add_argument");
863
perror("add_argument");
990
864
}
991
865
}
992
866
/* Add global environment variables */
993
867
for(char **e = g->environ; *e != NULL; e++){
994
868
if(not add_environment(p, *e, false)){
995
error(0, errno, "add_environment");
869
perror("add_environment");
996
870
}
997
871
}
998
872
}
999
873
}
1000
/* If this plugin has any environment variables, we need to
1001
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. */
1002
877
if(p->environ[0] != NULL){
1003
878
for(char **e = environ; *e != NULL; e++){
1004
879
if(not add_environment(p, *e, false)){
1005
error(0, errno, "add_environment");
880
perror("add_environment");
1006
881
}
1007
882
}
1008
883
}
1009
884
1010
885
int pipefd[2];
1011
#ifndef O_CLOEXEC
1012
886
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 */
1016
887
if(ret == -1){
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
888
perror("pipe");
889
exitstatus = EXIT_FAILURE;
890
goto fallback;
891
}
1032
892
/* Ask OS to automatic close the pipe on exec */
1033
893
ret = set_cloexec_flag(pipefd[0]);
1034
894
if(ret < 0){
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
895
perror("set_cloexec_flag");
896
exitstatus = EXIT_FAILURE;
1040
897
goto fallback;
1041
898
}
1042
899
ret = set_cloexec_flag(pipefd[1]);
1043
900
if(ret < 0){
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
901
perror("set_cloexec_flag");
902
exitstatus = EXIT_FAILURE;
1049
903
goto fallback;
1050
904
}
1051
#endif /* not O_CLOEXEC */
1052
905
/* Block SIGCHLD until process is safely in process list */
1053
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
907
&sigchld_action.sa_mask,
1055
908
NULL));
1056
909
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
910
perror("sigprocmask");
911
exitstatus = EXIT_FAILURE;
1060
912
goto fallback;
1061
913
}
1062
914
/* Starting a new process to be watched */
1065
917
pid = fork();
1066
918
} while(pid == -1 and errno == EINTR);
1067
919
if(pid == -1){
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]);
920
perror("fork");
921
exitstatus = EXIT_FAILURE;
1075
922
goto fallback;
1076
923
}
1077
924
if(pid == 0){
1078
925
/* this is the child process */
1079
926
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1080
927
if(ret < 0){
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
928
perror("sigaction");
929
_exit(EXIT_FAILURE);
1083
930
}
1084
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
932
if(ret < 0){
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
933
perror("sigprocmask");
934
_exit(EXIT_FAILURE);
1088
935
}
1089
936
1090
937
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1091
938
if(ret == -1){
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
939
perror("dup2");
940
_exit(EXIT_FAILURE);
1094
941
}
1095
942
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);
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
}
1102
958
}
1103
959
/* no return */
1104
960
}
1105
961
/* Parent process */
1106
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
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);
1109
966
if(new_plugin == NULL){
1110
error(0, errno, "getplugin");
967
perror("getplugin");
1111
968
ret = (int)(TEMP_FAILURE_RETRY
1112
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1113
970
NULL)));
1114
971
if(ret < 0){
1115
error(0, errno, "sigprocmask");
972
perror("sigprocmask");
1116
973
}
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
974
exitstatus = EXIT_FAILURE;
1119
975
goto fallback;
1120
976
}
1121
free(direntries[i]);
1122
977
1123
978
new_plugin->pid = pid;
1124
979
new_plugin->fd = pipefd[0];
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
980
1131
981
/* Unblock SIGCHLD so signal handler can be run if this process
1132
982
has already completed */
1133
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1134
984
&sigchld_action.sa_mask,
1135
985
NULL));
1136
986
if(ret < 0){
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
987
perror("sigprocmask");
988
exitstatus = EXIT_FAILURE;
1139
989
goto fallback;
1140
990
}
1141
991
1142
FD_SET(new_plugin->fd, &rfds_all);
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
1143
994
1144
995
if(maxfd < new_plugin->fd){
1145
996
maxfd = new_plugin->fd;
1146
997
}
1147
998
}
1148
999
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
1000
TEMP_FAILURE_RETRY(closedir(dir));
1001
dir = NULL;
1153
1002
free_plugin(getplugin(NULL));
1154
1003
1155
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1168
1017
fd_set rfds = rfds_all;
1169
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1170
1019
if(select_ret == -1 and errno != EINTR){
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
1020
perror("select");
1021
exitstatus = EXIT_FAILURE;
1173
1022
goto fallback;
1174
1023
}
1175
1024
/* OK, now either a process completed, or something can be read
1194
1043
(intmax_t) (proc->pid),
1195
1044
WTERMSIG(proc->status),
1196
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));
1197
1049
}
1198
1050
}
1199
1051
1200
1052
/* Remove the plugin */
1201
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1202
1055
1203
1056
/* Block signal while modifying process_list */
1204
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
1059
&sigchld_action.sa_mask,
1207
1060
NULL));
1208
1061
if(ret < 0){
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
1062
perror("sigprocmask");
1063
exitstatus = EXIT_FAILURE;
1211
1064
goto fallback;
1212
1065
}
1213
1066
1220
1073
(sigprocmask(SIG_UNBLOCK,
1221
1074
&sigchld_action.sa_mask, NULL)));
1222
1075
if(ret < 0){
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1076
perror("sigprocmask");
1077
exitstatus = EXIT_FAILURE;
1225
1078
goto fallback;
1226
1079
}
1227
1080
1237
1090
bool bret = print_out_password(proc->buffer,
1238
1091
proc->buffer_length);
1239
1092
if(not bret){
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1093
perror("print_out_password");
1094
exitstatus = EXIT_FAILURE;
1242
1095
}
1243
1096
goto fallback;
1244
1097
}
1245
1098
1246
1099
/* This process has not completed. Does it have any output? */
1247
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 */
1248
1103
/* This process had nothing to say at this time */
1249
1104
proc = proc->next;
1250
1105
continue;
1251
1106
}
1252
1107
/* Before reading, make the process' data buffer large enough */
1253
1108
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
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;
1259
1114
goto fallback;
1260
1115
}
1261
proc->buffer = new_buffer;
1262
1116
proc->buffer_size += BUFFER_SIZE;
1263
1117
}
1264
1118
/* Read from the process */
1283
1137
1284
1138
fallback:
1285
1139
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1288
1141
/* Fallback if all plugins failed, none are found or an error
1289
1142
occured */
1290
1143
bool bret;
1298
1151
}
1299
1152
bret = print_out_password(passwordbuffer, len);
1300
1153
if(not bret){
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1154
perror("print_out_password");
1155
exitstatus = EXIT_FAILURE;
1303
1156
}
1304
1157
}
1305
1158
1306
1159
/* Restore old signal handler */
1307
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1308
1161
if(ret == -1){
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1311
1164
}
1312
1165
1313
1166
if(custom_argv != NULL){
1317
1170
free(custom_argv);
1318
1171
}
1319
1172
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1173
if(dir != NULL){
1174
closedir(dir);
1324
1175
}
1325
1176
1326
1177
/* Kill the processes */
1330
1181
ret = kill(p->pid, SIGTERM);
1331
1182
if(ret == -1 and errno != ESRCH){
1332
1183
/* Set-uid proccesses might not get closed */
1333
error(0, errno, "kill");
1184
perror("kill");
1334
1185
}
1335
1186
}
1336
1187
}
1340
1191
ret = wait(NULL);
1341
1192
} while(ret >= 0);
1342
1193
if(errno != ECHILD){
1343
error(0, errno, "wait");
1194
perror("wait");
1344
1195
}
1345
1196
1346
1197
free_plugin_list();
1347
1198
1348
1199
free(plugindir);
1349
free(pluginhelperdir);
1350
1200
free(argfile);
1351
1201
1352
1202
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0