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- Committer: Björn Påhlsson
- Date: 2009-09-07 22:21:35 UTC
- mfrom: (237.2.121 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@braxen-20090907222135-pk7qmvsg3bmqqo5i
merge
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
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() */
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, opendir(), 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, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
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))){
116
110
}
117
111
}
118
112
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
113
plugin *new_plugin = malloc(sizeof(plugin));
123
114
if(new_plugin == NULL){
124
115
return NULL;
125
116
}
126
117
char *copy_name = NULL;
127
118
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
119
copy_name = strdup(name);
131
120
if(copy_name == NULL){
132
int e = errno;
133
121
free(new_plugin);
134
errno = e;
135
122
return NULL;
136
123
}
137
124
}
141
128
.disabled = false,
142
129
.next = plugin_list };
143
130
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
131
new_plugin->argv = malloc(sizeof(char *) * 2);
147
132
if(new_plugin->argv == NULL){
148
int e = errno;
149
133
free(copy_name);
150
134
free(new_plugin);
151
errno = e;
152
135
return NULL;
153
136
}
154
137
new_plugin->argv[0] = copy_name;
155
138
new_plugin->argv[1] = NULL;
156
139
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
140
new_plugin->environ = malloc(sizeof(char *));
160
141
if(new_plugin->environ == NULL){
161
int e = errno;
162
142
free(copy_name);
163
143
free(new_plugin->argv);
164
144
free(new_plugin);
165
errno = e;
166
145
return NULL;
167
146
}
168
147
new_plugin->environ[0] = NULL;
173
152
}
174
153
175
154
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
155
static bool add_to_char_array(const char *new, char ***array,
178
156
int *len){
179
157
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
185
160
/* Malloc check */
186
if(new_array == NULL){
161
if(*array == NULL){
187
162
return false;
188
163
}
189
*array = new_array;
190
164
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
165
char *copy = strdup(new);
195
166
if(copy == NULL){
196
167
return false;
197
168
}
204
175
}
205
176
206
177
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
178
static bool add_argument(plugin *p, const char *arg){
209
179
if(p == NULL){
210
180
return false;
213
183
}
214
184
215
185
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
186
static bool add_environment(plugin *p, const char *def, bool replace){
218
187
if(p == NULL){
219
188
return false;
221
190
/* namelen = length of name of environment variable */
222
191
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
192
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
226
195
/* It already exists */
227
196
if(replace){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
233
199
return false;
234
200
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
201
*e = new;
202
strcpy(*e, def);
237
203
}
238
204
return true;
239
205
}
241
207
return add_to_char_array(def, &(p->environ), &(p->envc));
242
208
}
243
209
244
#ifndef O_CLOEXEC
245
210
/*
246
211
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
212
* Descriptor Flags".
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
249
214
*/
250
__attribute__((warn_unused_result))
251
215
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
216
int ret = fcntl(fd, F_GETFD, 0);
253
217
/* If reading the flags failed, return error indication now. */
254
218
if(ret < 0){
255
219
return ret;
256
220
}
257
221
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
260
223
}
261
#endif /* not O_CLOEXEC */
262
224
263
225
264
226
/* Mark processes as completed when they exit, and save their exit
278
240
/* No child processes */
279
241
break;
280
242
}
281
error(0, errno, "waitpid");
243
perror("waitpid");
282
244
}
283
245
284
246
/* A child exited, find it in process_list */
296
258
}
297
259
298
260
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
261
static bool print_out_password(const char *buffer, size_t length){
301
262
ssize_t ret;
302
263
for(size_t written = 0; written < length; written += (size_t)ret){
310
271
}
311
272
312
273
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
274
static void free_plugin(plugin *plugin_node){
315
275
316
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
348
308
349
309
int main(int argc, char *argv[]){
350
310
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
352
311
char *argfile = NULL;
353
312
FILE *conffp;
354
struct dirent **direntries = NULL;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
355
316
struct stat st;
356
317
fd_set rfds_all;
357
318
int ret, maxfd = 0;
358
319
ssize_t sret;
320
intmax_t tmpmax;
359
321
uid_t uid = 65534;
360
322
gid_t gid = 65534;
361
323
bool debug = false;
365
327
.sa_flags = SA_NOCLDSTOP };
366
328
char **custom_argv = NULL;
367
329
int custom_argc = 0;
368
int dir_fd = -1;
369
330
370
331
/* Establish a signal handler */
371
332
sigemptyset(&sigchld_action.sa_mask);
372
333
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
373
334
if(ret == -1){
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
376
337
goto fallback;
377
338
}
378
339
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
379
340
if(ret == -1){
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
382
343
goto fallback;
383
344
}
384
345
416
377
.doc = "Group ID the plugins will run as", .group = 3 },
417
378
{ .name = "debug", .key = 132,
418
379
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
432
380
{ .name = NULL }
433
381
};
434
382
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
438
386
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
441
387
case 'g': /* --global-options */
442
{
388
if(arg != NULL){
443
389
char *plugin_option;
444
390
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
445
394
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
447
397
}
448
398
}
449
errno = 0;
450
399
}
451
400
break;
452
401
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
455
407
}
456
408
break;
457
409
case 'o': /* --options-for */
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
476
420
}
477
421
}
478
errno = 0;
479
422
}
480
423
break;
481
424
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
482
428
{
483
429
char *envdef = strchr(arg, ':');
484
430
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
487
431
break;
488
432
}
489
433
*envdef = '\0';
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
498
436
}
499
437
}
500
438
break;
501
439
case 'd': /* --disable */
502
{
440
if(arg != NULL){
503
441
plugin *p = getplugin(arg);
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
507
444
}
445
p->disabled = true;
508
446
}
509
447
break;
510
448
case 'e': /* --enable */
511
{
449
if(arg != NULL){
512
450
plugin *p = getplugin(arg);
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
516
453
}
454
p->disabled = false;
517
455
}
518
456
break;
519
457
case 128: /* --plugin-dir */
520
458
free(plugindir);
521
459
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
460
if(plugindir == NULL){
461
perror("strdup");
524
462
}
525
463
break;
526
464
case 129: /* --config-file */
527
465
/* This is already done by parse_opt_config_file() */
528
466
break;
529
467
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
531
470
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
471
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
536
476
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
539
477
break;
540
478
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
542
481
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
482
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
547
487
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
550
488
break;
551
489
case 132: /* --debug */
552
490
debug = true;
553
491
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
__builtin_unreachable();
568
case -3: /* --usage */
569
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
570
argp_state_help(state, state->out_stream,
571
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
572
__builtin_unreachable();
573
case 'V': /* --version */
574
fprintf(state->out_stream, "%s\n", argp_program_version);
575
exit(EXIT_SUCCESS);
576
break;
577
492
/*
578
493
* When adding more options before this line, remember to also add a
579
494
* "case" to the "parse_opt_config_file" function below.
582
497
/* Cryptsetup always passes an argument, which is an empty
583
498
string if "none" was specified in /etc/crypttab. So if
584
499
argument was empty, we ignore it silently. */
585
if(arg[0] == '\0'){
586
break;
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
587
502
}
588
/* FALLTHROUGH */
503
break;
504
case ARGP_KEY_END:
505
break;
589
506
default:
590
507
return ARGP_ERR_UNKNOWN;
591
508
}
592
return errno; /* Set to 0 at start */
509
return 0;
593
510
}
594
511
595
512
/* This option parser is the same as parse_opt() above, except it
597
514
error_t parse_opt_config_file(int key, char *arg,
598
515
__attribute__((unused))
599
516
struct argp_state *state){
600
errno = 0;
601
517
switch(key){
602
518
case 'g': /* --global-options */
603
519
case 'G': /* --global-env */
610
526
case 129: /* --config-file */
611
527
free(argfile);
612
528
argfile = strdup(arg);
613
if(argfile != NULL){
614
errno = 0;
529
if(argfile == NULL){
530
perror("strdup");
615
531
}
616
532
break;
617
533
case 130: /* --userid */
618
534
case 131: /* --groupid */
619
535
case 132: /* --debug */
620
case 133: /* --plugin-helper-dir */
621
case '?': /* --help */
622
case -3: /* --usage */
623
case 'V': /* --version */
624
536
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
625
538
break;
626
539
default:
627
540
return ARGP_ERR_UNKNOWN;
628
541
}
629
return errno;
542
return 0;
630
543
}
631
544
632
545
struct argp argp = { .options = options,
636
549
637
550
/* Parse using parse_opt_config_file() in order to get the custom
638
551
config file location, if any. */
639
ret = argp_parse(&argp, argc, argv,
640
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
641
NULL, NULL);
642
switch(ret){
643
case 0:
644
break;
645
case ENOMEM:
646
default:
647
errno = ret;
648
error(0, errno, "argp_parse");
649
exitstatus = EX_OSERR;
650
goto fallback;
651
case EINVAL:
652
exitstatus = EX_USAGE;
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
653
556
goto fallback;
654
557
}
655
558
672
575
custom_argc = 1;
673
576
custom_argv = malloc(sizeof(char*) * 2);
674
577
if(custom_argv == NULL){
675
error(0, errno, "malloc");
676
exitstatus = EX_OSERR;
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
677
580
goto fallback;
678
581
}
679
582
custom_argv[0] = argv[0];
695
598
}
696
599
new_arg = strdup(p);
697
600
if(new_arg == NULL){
698
error(0, errno, "strdup");
699
exitstatus = EX_OSERR;
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
700
603
free(org_line);
701
604
goto fallback;
702
605
}
703
606
704
607
custom_argc += 1;
705
{
706
char **new_argv = realloc(custom_argv, sizeof(char *)
707
* ((size_t)custom_argc + 1));
708
if(new_argv == NULL){
709
error(0, errno, "realloc");
710
exitstatus = EX_OSERR;
711
free(new_arg);
712
free(org_line);
713
goto fallback;
714
} else {
715
custom_argv = new_argv;
716
}
608
custom_argv = realloc(custom_argv, sizeof(char *)
609
* ((unsigned int) custom_argc + 1));
610
if(custom_argv == NULL){
611
perror("realloc");
612
exitstatus = EXIT_FAILURE;
613
free(org_line);
614
goto fallback;
717
615
}
718
616
custom_argv[custom_argc-1] = new_arg;
719
617
custom_argv[custom_argc] = NULL;
720
618
}
721
619
}
722
do {
723
ret = fclose(conffp);
724
} while(ret == EOF and errno == EINTR);
725
if(ret == EOF){
726
error(0, errno, "fclose");
727
exitstatus = EX_IOERR;
728
goto fallback;
729
}
730
620
free(org_line);
731
621
} else {
732
622
/* Check for harmful errors and go to fallback. Other errors might
733
623
not affect opening plugins */
734
624
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
735
error(0, errno, "fopen");
736
exitstatus = EX_OSERR;
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
737
627
goto fallback;
738
628
}
739
629
}
740
/* If there were any arguments from the configuration file, pass
741
them to parser as command line arguments */
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
742
632
if(custom_argv != NULL){
743
ret = argp_parse(&argp, custom_argc, custom_argv,
744
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
745
NULL, NULL);
746
switch(ret){
747
case 0:
748
break;
749
case ENOMEM:
750
default:
751
errno = ret;
752
error(0, errno, "argp_parse");
753
exitstatus = EX_OSERR;
754
goto fallback;
755
case EINVAL:
756
exitstatus = EX_CONFIG;
633
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
0, NULL);
635
if(ret == ARGP_ERR_UNKNOWN){
636
fprintf(stderr, "Unknown error while parsing arguments\n");
637
exitstatus = EXIT_FAILURE;
757
638
goto fallback;
758
639
}
759
640
}
760
641
761
642
/* Parse actual command line arguments, to let them override the
762
643
config file */
763
ret = argp_parse(&argp, argc, argv,
764
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
765
NULL, NULL);
766
switch(ret){
767
case 0:
768
break;
769
case ENOMEM:
770
default:
771
errno = ret;
772
error(0, errno, "argp_parse");
773
exitstatus = EX_OSERR;
774
goto fallback;
775
case EINVAL:
776
exitstatus = EX_USAGE;
777
goto fallback;
778
}
779
780
{
781
char *pluginhelperenv;
782
bool bret = true;
783
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
784
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
785
if(ret != -1){
786
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
787
}
788
if(ret == -1 or not bret){
789
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
790
" environment variable to \"%s\" for all plugins\n",
791
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
792
}
793
if(ret != -1){
794
free(pluginhelperenv);
795
}
644
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
645
if(ret == ARGP_ERR_UNKNOWN){
646
fprintf(stderr, "Unknown error while parsing arguments\n");
647
exitstatus = EXIT_FAILURE;
648
goto fallback;
796
649
}
797
650
798
651
if(debug){
799
for(plugin *p = plugin_list; p != NULL; p = p->next){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
800
653
fprintf(stderr, "Plugin: %s has %d arguments\n",
801
654
p->name ? p->name : "Global", p->argc - 1);
802
655
for(char **a = p->argv; *a != NULL; a++){
809
662
}
810
663
}
811
664
812
if(getuid() == 0){
813
/* Work around Debian bug #633582:
814
<https://bugs.debian.org/633582> */
815
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
816
if(plugindir_fd == -1){
817
if(errno != ENOENT){
818
error(0, errno, "open(\"" PDIR "\")");
819
}
820
} else {
821
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
822
if(ret == -1){
823
error(0, errno, "fstat");
824
} else {
825
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
826
ret = fchown(plugindir_fd, uid, gid);
827
if(ret == -1){
828
error(0, errno, "fchown");
829
}
830
}
831
}
832
close(plugindir_fd);
833
}
834
}
835
836
/* Lower permissions */
837
ret = setgid(gid);
665
/* Strip permissions down to nobody */
666
setgid(gid);
838
667
if(ret == -1){
839
error(0, errno, "setgid");
668
perror("setgid");
840
669
}
841
670
ret = setuid(uid);
842
671
if(ret == -1){
843
error(0, errno, "setuid");
844
}
845
846
/* Open plugin directory with close_on_exec flag */
672
perror("setuid");
673
}
674
675
if(plugindir == NULL){
676
dir = opendir(PDIR);
677
} else {
678
dir = opendir(plugindir);
679
}
680
681
if(dir == NULL){
682
perror("Could not open plugin dir");
683
exitstatus = EXIT_FAILURE;
684
goto fallback;
685
}
686
687
/* Set the FD_CLOEXEC flag on the directory, if possible */
847
688
{
848
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
849
#ifdef O_CLOEXEC
850
O_CLOEXEC
851
#else /* not O_CLOEXEC */
852
0
853
#endif /* not O_CLOEXEC */
854
);
855
if(dir_fd == -1){
856
error(0, errno, "Could not open plugin dir");
857
exitstatus = EX_UNAVAILABLE;
858
goto fallback;
859
}
860
861
#ifndef O_CLOEXEC
862
/* Set the FD_CLOEXEC flag on the directory */
863
ret = set_cloexec_flag(dir_fd);
864
if(ret < 0){
865
error(0, errno, "set_cloexec_flag");
866
exitstatus = EX_OSERR;
867
goto fallback;
868
}
869
#endif /* O_CLOEXEC */
870
}
871
872
int good_name(const struct dirent * const dirent){
873
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
874
"*.dpkg-old", "*.dpkg-bak",
875
"*.dpkg-divert", NULL };
876
#ifdef __GNUC__
877
#pragma GCC diagnostic push
878
#pragma GCC diagnostic ignored "-Wcast-qual"
879
#endif
880
for(const char **pat = (const char **)patterns;
881
*pat != NULL; pat++){
882
#ifdef __GNUC__
883
#pragma GCC diagnostic pop
884
#endif
885
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
886
!= FNM_NOMATCH){
887
if(debug){
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
" matching pattern %s\n", dirent->d_name, *pat);
890
}
891
return 0;
689
int dir_fd = dirfd(dir);
690
if(dir_fd >= 0){
691
ret = set_cloexec_flag(dir_fd);
692
if(ret < 0){
693
perror("set_cloexec_flag");
694
exitstatus = EXIT_FAILURE;
695
goto fallback;
892
696
}
893
697
}
894
return 1;
895
}
896
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
if(numplugins == -1){
900
error(0, errno, "Could not scan plugin dir");
901
direntries = NULL;
902
exitstatus = EX_OSERR;
903
goto fallback;
904
698
}
905
699
906
700
FD_ZERO(&rfds_all);
907
701
908
702
/* Read and execute any executable in the plugin directory*/
909
for(int i = 0; i < numplugins; i++){
910
911
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
912
if(plugin_fd == -1){
913
error(0, errno, "Could not open plugin");
914
free(direntries[i]);
703
while(true){
704
dirst = readdir(dir);
705
706
/* All directory entries have been processed */
707
if(dirst == NULL){
708
if(errno == EBADF){
709
perror("readdir");
710
exitstatus = EXIT_FAILURE;
711
goto fallback;
712
}
713
break;
714
}
715
716
d_name_len = strlen(dirst->d_name);
717
718
/* Ignore dotfiles, backup files and other junk */
719
{
720
bool bad_name = false;
721
722
const char const *bad_prefixes[] = { ".", "#", NULL };
723
724
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
725
".dpkg-old",
726
".dpkg-bak",
727
".dpkg-divert", NULL };
728
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
729
size_t pre_len = strlen(*pre);
730
if((d_name_len >= pre_len)
731
and strncmp((dirst->d_name), *pre, pre_len) == 0){
732
if(debug){
733
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
734
" with bad prefix %s\n", dirst->d_name, *pre);
735
}
736
bad_name = true;
737
break;
738
}
739
}
740
if(bad_name){
741
continue;
742
}
743
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
744
size_t suf_len = strlen(*suf);
745
if((d_name_len >= suf_len)
746
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
747
== 0)){
748
if(debug){
749
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
750
" with bad suffix %s\n", dirst->d_name, *suf);
751
}
752
bad_name = true;
753
break;
754
}
755
}
756
757
if(bad_name){
758
continue;
759
}
760
}
761
762
char *filename;
763
if(plugindir == NULL){
764
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
765
} else {
766
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
767
}
768
if(ret < 0){
769
perror("asprintf");
915
770
continue;
916
771
}
917
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
772
773
ret = stat(filename, &st);
918
774
if(ret == -1){
919
error(0, errno, "stat");
920
close(plugin_fd);
921
free(direntries[i]);
775
perror("stat");
776
free(filename);
922
777
continue;
923
778
}
924
779
925
780
/* Ignore non-executable files */
926
if(not S_ISREG(st.st_mode)
927
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
928
X_OK, 0)) != 0)){
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
929
782
if(debug){
930
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
931
" with bad type or mode\n",
932
plugindir != NULL ? plugindir : PDIR,
933
direntries[i]->d_name);
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
934
785
}
935
close(plugin_fd);
936
free(direntries[i]);
786
free(filename);
937
787
continue;
938
788
}
939
789
940
plugin *p = getplugin(direntries[i]->d_name);
790
plugin *p = getplugin(dirst->d_name);
941
791
if(p == NULL){
942
error(0, errno, "getplugin");
943
close(plugin_fd);
944
free(direntries[i]);
792
perror("getplugin");
793
free(filename);
945
794
continue;
946
795
}
947
796
if(p->disabled){
948
797
if(debug){
949
798
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
950
direntries[i]->d_name);
799
dirst->d_name);
951
800
}
952
close(plugin_fd);
953
free(direntries[i]);
801
free(filename);
954
802
continue;
955
803
}
956
804
{
959
807
if(g != NULL){
960
808
for(char **a = g->argv + 1; *a != NULL; a++){
961
809
if(not add_argument(p, *a)){
962
error(0, errno, "add_argument");
810
perror("add_argument");
963
811
}
964
812
}
965
813
/* Add global environment variables */
966
814
for(char **e = g->environ; *e != NULL; e++){
967
815
if(not add_environment(p, *e, false)){
968
error(0, errno, "add_environment");
816
perror("add_environment");
969
817
}
970
818
}
971
819
}
972
820
}
973
/* If this plugin has any environment variables, we need to
974
duplicate the environment from this process, too. */
821
/* If this plugin has any environment variables, we will call
822
using execve and need to duplicate the environment from this
823
process, too. */
975
824
if(p->environ[0] != NULL){
976
825
for(char **e = environ; *e != NULL; e++){
977
826
if(not add_environment(p, *e, false)){
978
error(0, errno, "add_environment");
827
perror("add_environment");
979
828
}
980
829
}
981
830
}
982
831
983
832
int pipefd[2];
984
#ifndef O_CLOEXEC
985
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
986
#else /* O_CLOEXEC */
987
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
988
#endif /* O_CLOEXEC */
833
ret = pipe(pipefd);
989
834
if(ret == -1){
990
error(0, errno, "pipe");
991
exitstatus = EX_OSERR;
992
free(direntries[i]);
993
goto fallback;
994
}
995
if(pipefd[0] >= FD_SETSIZE){
996
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
997
FD_SETSIZE);
998
close(pipefd[0]);
999
close(pipefd[1]);
1000
exitstatus = EX_OSERR;
1001
free(direntries[i]);
1002
goto fallback;
1003
}
1004
#ifndef O_CLOEXEC
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
1005
839
/* Ask OS to automatic close the pipe on exec */
1006
840
ret = set_cloexec_flag(pipefd[0]);
1007
841
if(ret < 0){
1008
error(0, errno, "set_cloexec_flag");
1009
close(pipefd[0]);
1010
close(pipefd[1]);
1011
exitstatus = EX_OSERR;
1012
free(direntries[i]);
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1013
844
goto fallback;
1014
845
}
1015
846
ret = set_cloexec_flag(pipefd[1]);
1016
847
if(ret < 0){
1017
error(0, errno, "set_cloexec_flag");
1018
close(pipefd[0]);
1019
close(pipefd[1]);
1020
exitstatus = EX_OSERR;
1021
free(direntries[i]);
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1022
850
goto fallback;
1023
851
}
1024
#endif /* not O_CLOEXEC */
1025
852
/* Block SIGCHLD until process is safely in process list */
1026
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1027
&sigchld_action.sa_mask,
1028
NULL));
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1029
854
if(ret < 0){
1030
error(0, errno, "sigprocmask");
1031
exitstatus = EX_OSERR;
1032
free(direntries[i]);
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1033
857
goto fallback;
1034
858
}
1035
859
/* Starting a new process to be watched */
1036
pid_t pid;
1037
do {
1038
pid = fork();
1039
} while(pid == -1 and errno == EINTR);
860
pid_t pid = fork();
1040
861
if(pid == -1){
1041
error(0, errno, "fork");
1042
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1043
&sigchld_action.sa_mask, NULL));
1044
close(pipefd[0]);
1045
close(pipefd[1]);
1046
exitstatus = EX_OSERR;
1047
free(direntries[i]);
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1048
864
goto fallback;
1049
865
}
1050
866
if(pid == 0){
1051
867
/* this is the child process */
1052
868
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1053
869
if(ret < 0){
1054
error(0, errno, "sigaction");
1055
_exit(EX_OSERR);
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1056
872
}
1057
873
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1058
874
if(ret < 0){
1059
error(0, errno, "sigprocmask");
1060
_exit(EX_OSERR);
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1061
877
}
1062
878
1063
879
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1064
880
if(ret == -1){
1065
error(0, errno, "dup2");
1066
_exit(EX_OSERR);
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1067
883
}
1068
884
1069
if(fexecve(plugin_fd, p->argv,
1070
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1071
error(0, errno, "fexecve for %s/%s",
1072
plugindir != NULL ? plugindir : PDIR,
1073
direntries[i]->d_name);
1074
_exit(EX_OSERR);
885
if(dirfd(dir) < 0){
886
/* If dir has no file descriptor, we could not set FD_CLOEXEC
887
above and must now close it manually here. */
888
closedir(dir);
889
}
890
if(p->environ[0] == NULL){
891
if(execv(filename, p->argv) < 0){
892
perror("execv");
893
_exit(EXIT_FAILURE);
894
}
895
} else {
896
if(execve(filename, p->argv, p->environ) < 0){
897
perror("execve");
898
_exit(EXIT_FAILURE);
899
}
1075
900
}
1076
901
/* no return */
1077
902
}
1078
903
/* Parent process */
1079
904
close(pipefd[1]); /* Close unused write end of pipe */
1080
close(plugin_fd);
1081
plugin *new_plugin = getplugin(direntries[i]->d_name);
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1082
907
if(new_plugin == NULL){
1083
error(0, errno, "getplugin");
1084
ret = (int)(TEMP_FAILURE_RETRY
1085
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1086
NULL)));
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1087
910
if(ret < 0){
1088
error(0, errno, "sigprocmask");
911
perror("sigprocmask");
1089
912
}
1090
exitstatus = EX_OSERR;
1091
free(direntries[i]);
913
exitstatus = EXIT_FAILURE;
1092
914
goto fallback;
1093
915
}
1094
free(direntries[i]);
1095
916
1096
917
new_plugin->pid = pid;
1097
918
new_plugin->fd = pipefd[0];
1098
1099
if(debug){
1100
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1101
new_plugin->name, (intmax_t) (new_plugin->pid));
1102
}
1103
919
1104
920
/* Unblock SIGCHLD so signal handler can be run if this process
1105
921
has already completed */
1106
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1107
&sigchld_action.sa_mask,
1108
NULL));
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1109
923
if(ret < 0){
1110
error(0, errno, "sigprocmask");
1111
exitstatus = EX_OSERR;
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1112
926
goto fallback;
1113
927
}
1114
928
1119
933
}
1120
934
}
1121
935
1122
free(direntries);
1123
direntries = NULL;
1124
close(dir_fd);
1125
dir_fd = -1;
936
closedir(dir);
937
dir = NULL;
1126
938
free_plugin(getplugin(NULL));
1127
939
1128
940
for(plugin *p = plugin_list; p != NULL; p = p->next){
1140
952
while(plugin_list){
1141
953
fd_set rfds = rfds_all;
1142
954
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1143
if(select_ret == -1 and errno != EINTR){
1144
error(0, errno, "select");
1145
exitstatus = EX_OSERR;
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1146
958
goto fallback;
1147
959
}
1148
960
/* OK, now either a process completed, or something can be read
1167
979
(intmax_t) (proc->pid),
1168
980
WTERMSIG(proc->status),
1169
981
strsignal(WTERMSIG(proc->status)));
982
} else if(WCOREDUMP(proc->status)){
983
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
984
" core\n", proc->name, (intmax_t) (proc->pid));
1170
985
}
1171
986
}
1172
987
1174
989
FD_CLR(proc->fd, &rfds_all);
1175
990
1176
991
/* Block signal while modifying process_list */
1177
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1178
(SIG_BLOCK,
1179
&sigchld_action.sa_mask,
1180
NULL));
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1181
993
if(ret < 0){
1182
error(0, errno, "sigprocmask");
1183
exitstatus = EX_OSERR;
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1184
996
goto fallback;
1185
997
}
1186
998
1189
1001
proc = next_plugin;
1190
1002
1191
1003
/* We are done modifying process list, so unblock signal */
1192
ret = (int)(TEMP_FAILURE_RETRY
1193
(sigprocmask(SIG_UNBLOCK,
1194
&sigchld_action.sa_mask, NULL)));
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1195
1006
if(ret < 0){
1196
error(0, errno, "sigprocmask");
1197
exitstatus = EX_OSERR;
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1198
1009
goto fallback;
1199
1010
}
1200
1011
1210
1021
bool bret = print_out_password(proc->buffer,
1211
1022
proc->buffer_length);
1212
1023
if(not bret){
1213
error(0, errno, "print_out_password");
1214
exitstatus = EX_IOERR;
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1215
1026
}
1216
1027
goto fallback;
1217
1028
}
1224
1035
}
1225
1036
/* Before reading, make the process' data buffer large enough */
1226
1037
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1227
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1228
+ (size_t) BUFFER_SIZE);
1229
if(new_buffer == NULL){
1230
error(0, errno, "malloc");
1231
exitstatus = EX_OSERR;
1038
proc->buffer = realloc(proc->buffer, proc->buffer_size
1039
+ (size_t) BUFFER_SIZE);
1040
if(proc->buffer == NULL){
1041
perror("malloc");
1042
exitstatus = EXIT_FAILURE;
1232
1043
goto fallback;
1233
1044
}
1234
proc->buffer = new_buffer;
1235
1045
proc->buffer_size += BUFFER_SIZE;
1236
1046
}
1237
1047
/* Read from the process */
1238
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1239
proc->buffer
1240
+ proc->buffer_length,
1241
BUFFER_SIZE));
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1242
1050
if(sret < 0){
1243
1051
/* Read error from this process; ignore the error */
1244
1052
proc = proc->next;
1256
1064
1257
1065
fallback:
1258
1066
1259
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1260
and exitstatus != EX_OK)){
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1261
1068
/* Fallback if all plugins failed, none are found or an error
1262
1069
occured */
1263
1070
bool bret;
1271
1078
}
1272
1079
bret = print_out_password(passwordbuffer, len);
1273
1080
if(not bret){
1274
error(0, errno, "print_out_password");
1275
exitstatus = EX_IOERR;
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1276
1083
}
1277
1084
}
1278
1085
1279
1086
/* Restore old signal handler */
1280
1087
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1281
1088
if(ret == -1){
1282
error(0, errno, "sigaction");
1283
exitstatus = EX_OSERR;
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1284
1091
}
1285
1092
1286
1093
if(custom_argv != NULL){
1290
1097
free(custom_argv);
1291
1098
}
1292
1099
1293
free(direntries);
1294
1295
if(dir_fd != -1){
1296
close(dir_fd);
1100
if(dir != NULL){
1101
closedir(dir);
1297
1102
}
1298
1103
1299
1104
/* Kill the processes */
1303
1108
ret = kill(p->pid, SIGTERM);
1304
1109
if(ret == -1 and errno != ESRCH){
1305
1110
/* Set-uid proccesses might not get closed */
1306
error(0, errno, "kill");
1111
perror("kill");
1307
1112
}
1308
1113
}
1309
1114
}
1310
1115
1311
1116
/* Wait for any remaining child processes to terminate */
1312
do {
1117
do{
1313
1118
ret = wait(NULL);
1314
1119
} while(ret >= 0);
1315
1120
if(errno != ECHILD){
1316
error(0, errno, "wait");
1121
perror("wait");
1317
1122
}
1318
1123
1319
1124
free_plugin_list();
1320
1125
1321
1126
free(plugindir);
1322
free(pluginhelperdir);
1323
1127
free(argfile);
1324
1128
1325
1129
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0