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- Committer: Teddy Hogeborn
- Date: 2019-02-09 23:51:47 UTC
- Revision ID: teddy@recompile.se-20190209235147-t9ol2v4bgnd6pvkh
Update Debian package standard-version to "4.3.0"
* debian/control (Standards-Version): Update to "4.3.0".
* debian/control (Standards-Version): Update to "4.3.0".
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
111
117
}
112
118
/* Create a new plugin */
113
119
plugin *new_plugin = NULL;
114
do{
120
do {
115
121
new_plugin = malloc(sizeof(plugin));
116
}while(new_plugin == NULL and errno == EINTR);
122
} while(new_plugin == NULL and errno == EINTR);
117
123
if(new_plugin == NULL){
118
124
return NULL;
119
125
}
120
126
char *copy_name = NULL;
121
127
if(name != NULL){
122
do{
128
do {
123
129
copy_name = strdup(name);
124
}while(copy_name == NULL and errno == EINTR);
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
}
133
141
.disabled = false,
134
142
.next = plugin_list };
135
143
136
do{
144
do {
137
145
new_plugin->argv = malloc(sizeof(char *) * 2);
138
}while(new_plugin->argv == NULL and errno == EINTR);
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;
145
155
new_plugin->argv[1] = NULL;
146
156
147
do{
157
do {
148
158
new_plugin->environ = malloc(sizeof(char *));
149
}while(new_plugin->environ == NULL and errno == EINTR);
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 */
167
do{
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
}while(*array == NULL and errno == EINTR);
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);
171
185
/* Malloc check */
172
if(*array == NULL){
186
if(new_array == NULL){
173
187
return false;
174
188
}
189
*array = new_array;
175
190
/* Make a copy of the new string */
176
191
char *copy;
177
do{
192
do {
178
193
copy = strdup(new);
179
}while(copy == NULL and errno == EINTR);
194
} while(copy == NULL and errno == EINTR);
180
195
if(copy == NULL){
181
196
return false;
182
197
}
189
204
}
190
205
191
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
192
208
static bool add_argument(plugin *p, const char *arg){
193
209
if(p == NULL){
194
210
return false;
197
213
}
198
214
199
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
200
217
static bool add_environment(plugin *p, const char *def, bool replace){
201
218
if(p == NULL){
202
219
return false;
204
221
/* namelen = length of name of environment variable */
205
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
223
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
209
226
/* It already exists */
210
227
if(replace){
211
char *new;
212
do{
213
new = realloc(*e, strlen(def) + 1);
214
}while(new == NULL and errno == EINTR);
215
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
216
233
return false;
217
234
}
218
*e = new;
219
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
220
237
}
221
238
return true;
222
239
}
224
241
return add_to_char_array(def, &(p->environ), &(p->envc));
225
242
}
226
243
244
#ifndef O_CLOEXEC
227
245
/*
228
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
247
* Descriptor Flags".
230
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
249
*/
250
__attribute__((warn_unused_result))
232
251
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
253
/* If reading the flags failed, return error indication now. */
235
254
if(ret < 0){
236
255
return ret;
237
256
}
238
257
/* Store modified flag word in the descriptor. */
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
240
260
}
261
#endif /* not O_CLOEXEC */
241
262
242
263
243
264
/* Mark processes as completed when they exit, and save their exit
257
278
/* No child processes */
258
279
break;
259
280
}
260
perror("waitpid");
281
error(0, errno, "waitpid");
261
282
}
262
283
263
284
/* A child exited, find it in process_list */
275
296
}
276
297
277
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
278
300
static bool print_out_password(const char *buffer, size_t length){
279
301
ssize_t ret;
280
302
for(size_t written = 0; written < length; written += (size_t)ret){
288
310
}
289
311
290
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
291
314
static void free_plugin(plugin *plugin_node){
292
315
293
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
325
348
326
349
int main(int argc, char *argv[]){
327
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
328
352
char *argfile = NULL;
329
353
FILE *conffp;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
354
struct dirent **direntries = NULL;
333
355
struct stat st;
334
356
fd_set rfds_all;
335
357
int ret, maxfd = 0;
343
365
.sa_flags = SA_NOCLDSTOP };
344
366
char **custom_argv = NULL;
345
367
int custom_argc = 0;
368
int dir_fd = -1;
346
369
347
370
/* Establish a signal handler */
348
371
sigemptyset(&sigchld_action.sa_mask);
349
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
350
373
if(ret == -1){
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
353
376
goto fallback;
354
377
}
355
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
356
379
if(ret == -1){
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
359
382
goto fallback;
360
383
}
361
384
393
416
.doc = "Group ID the plugins will run as", .group = 3 },
394
417
{ .name = "debug", .key = 132,
395
418
.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 },
396
432
{ .name = NULL }
397
433
};
398
434
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
401
438
switch(key){
402
439
char *tmp;
403
intmax_t tmpmax;
440
intmax_t tmp_id;
404
441
case 'g': /* --global-options */
405
if(arg != NULL){
442
{
406
443
char *plugin_option;
407
444
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
445
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
446
break;
414
447
}
415
448
}
449
errno = 0;
416
450
}
417
451
break;
418
452
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
424
455
}
425
456
break;
426
457
case 'o': /* --options-for */
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
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;
437
476
}
438
477
}
478
errno = 0;
439
479
}
440
480
break;
441
481
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
482
{
446
483
char *envdef = strchr(arg, ':');
447
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
448
487
break;
449
488
}
450
489
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
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;
453
498
}
454
499
}
455
500
break;
456
501
case 'd': /* --disable */
457
if(arg != NULL){
502
{
458
503
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
461
507
}
462
p->disabled = true;
463
508
}
464
509
break;
465
510
case 'e': /* --enable */
466
if(arg != NULL){
511
{
467
512
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
470
516
}
471
p->disabled = false;
472
517
}
473
518
break;
474
519
case 128: /* --plugin-dir */
475
520
free(plugindir);
476
521
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
522
if(plugindir != NULL){
523
errno = 0;
479
524
}
480
525
break;
481
526
case 129: /* --config-file */
482
527
/* This is already done by parse_opt_config_file() */
483
528
break;
484
529
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
530
tmp_id = strtoimax(arg, &tmp, 10);
487
531
if(errno != 0 or tmp == arg or *tmp != '\0'
488
or tmpmax != (uid_t)tmpmax){
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
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;
493
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
494
539
break;
495
540
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
541
tmp_id = strtoimax(arg, &tmp, 10);
498
542
if(errno != 0 or tmp == arg or *tmp != '\0'
499
or tmpmax != (gid_t)tmpmax){
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
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;
504
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
505
550
break;
506
551
case 132: /* --debug */
507
552
debug = true;
508
553
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
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
509
575
/*
510
576
* When adding more options before this line, remember to also add a
511
577
* "case" to the "parse_opt_config_file" function below.
514
580
/* Cryptsetup always passes an argument, which is an empty
515
581
string if "none" was specified in /etc/crypttab. So if
516
582
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
519
585
}
520
break;
521
case ARGP_KEY_END:
522
break;
586
/* FALLTHROUGH */
523
587
default:
524
588
return ARGP_ERR_UNKNOWN;
525
589
}
526
return 0;
590
return errno; /* Set to 0 at start */
527
591
}
528
592
529
593
/* This option parser is the same as parse_opt() above, except it
531
595
error_t parse_opt_config_file(int key, char *arg,
532
596
__attribute__((unused))
533
597
struct argp_state *state){
598
errno = 0;
534
599
switch(key){
535
600
case 'g': /* --global-options */
536
601
case 'G': /* --global-env */
543
608
case 129: /* --config-file */
544
609
free(argfile);
545
610
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
611
if(argfile != NULL){
612
errno = 0;
548
613
}
549
614
break;
550
615
case 130: /* --userid */
551
616
case 131: /* --groupid */
552
617
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
553
622
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
623
break;
556
624
default:
557
625
return ARGP_ERR_UNKNOWN;
558
626
}
559
return 0;
627
return errno;
560
628
}
561
629
562
630
struct argp argp = { .options = options,
566
634
567
635
/* Parse using parse_opt_config_file() in order to get the custom
568
636
config file location, if any. */
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
571
fprintf(stderr, "Unknown error while parsing arguments\n");
572
exitstatus = EXIT_FAILURE;
637
ret = argp_parse(&argp, argc, argv,
638
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
639
NULL, NULL);
640
switch(ret){
641
case 0:
642
break;
643
case ENOMEM:
644
default:
645
errno = ret;
646
error(0, errno, "argp_parse");
647
exitstatus = EX_OSERR;
648
goto fallback;
649
case EINVAL:
650
exitstatus = EX_USAGE;
573
651
goto fallback;
574
652
}
575
653
592
670
custom_argc = 1;
593
671
custom_argv = malloc(sizeof(char*) * 2);
594
672
if(custom_argv == NULL){
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
597
675
goto fallback;
598
676
}
599
677
custom_argv[0] = argv[0];
615
693
}
616
694
new_arg = strdup(p);
617
695
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
620
698
free(org_line);
621
699
goto fallback;
622
700
}
623
701
624
702
custom_argc += 1;
625
custom_argv = realloc(custom_argv, sizeof(char *)
626
* ((unsigned int) custom_argc + 1));
627
if(custom_argv == NULL){
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
630
free(org_line);
631
goto fallback;
703
{
704
char **new_argv = realloc(custom_argv, sizeof(char *)
705
* ((size_t)custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
632
715
}
633
716
custom_argv[custom_argc-1] = new_arg;
634
717
custom_argv[custom_argc] = NULL;
635
718
}
636
719
}
637
do{
720
do {
638
721
ret = fclose(conffp);
639
}while(ret == EOF and errno == EINTR);
722
} while(ret == EOF and errno == EINTR);
640
723
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
643
726
goto fallback;
644
727
}
645
728
free(org_line);
647
730
/* Check for harmful errors and go to fallback. Other errors might
648
731
not affect opening plugins */
649
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
652
735
goto fallback;
653
736
}
654
737
}
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
657
740
if(custom_argv != NULL){
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
661
fprintf(stderr, "Unknown error while parsing arguments\n");
662
exitstatus = EXIT_FAILURE;
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
663
755
goto fallback;
664
756
}
665
757
}
666
758
667
759
/* Parse actual command line arguments, to let them override the
668
760
config file */
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
674
794
}
675
795
676
796
if(debug){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
798
fprintf(stderr, "Plugin: %s has %d arguments\n",
679
799
p->name ? p->name : "Global", p->argc - 1);
680
800
for(char **a = p->argv; *a != NULL; a++){
687
807
}
688
808
}
689
809
690
/* Strip permissions down to nobody */
691
setgid(gid);
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<https://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
close(plugindir_fd);
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
692
836
if(ret == -1){
693
perror("setgid");
837
error(0, errno, "setgid");
694
838
}
695
839
ret = setuid(uid);
696
840
if(ret == -1){
697
perror("setuid");
698
}
699
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
704
}
705
706
if(dir == NULL){
707
perror("Could not open plugin dir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
713
845
{
714
int dir_fd = dirfd(dir);
715
if(dir_fd >= 0){
716
ret = set_cloexec_flag(dir_fd);
717
if(ret < 0){
718
perror("set_cloexec_flag");
719
exitstatus = EXIT_FAILURE;
720
goto fallback;
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
721
890
}
722
891
}
892
return 1;
893
}
894
895
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
896
alphasort);
897
if(numplugins == -1){
898
error(0, errno, "Could not scan plugin dir");
899
direntries = NULL;
900
exitstatus = EX_OSERR;
901
goto fallback;
723
902
}
724
903
725
904
FD_ZERO(&rfds_all);
726
905
727
906
/* Read and execute any executable in the plugin directory*/
728
while(true){
729
do{
730
dirst = readdir(dir);
731
}while(dirst == NULL and errno == EINTR);
732
733
/* All directory entries have been processed */
734
if(dirst == NULL){
735
if(errno == EBADF){
736
perror("readdir");
737
exitstatus = EXIT_FAILURE;
738
goto fallback;
739
}
740
break;
741
}
742
743
d_name_len = strlen(dirst->d_name);
744
745
/* Ignore dotfiles, backup files and other junk */
746
{
747
bool bad_name = false;
748
749
const char const *bad_prefixes[] = { ".", "#", NULL };
750
751
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
752
".dpkg-old",
753
".dpkg-bak",
754
".dpkg-divert", NULL };
755
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
756
size_t pre_len = strlen(*pre);
757
if((d_name_len >= pre_len)
758
and strncmp((dirst->d_name), *pre, pre_len) == 0){
759
if(debug){
760
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
" with bad prefix %s\n", dirst->d_name, *pre);
762
}
763
bad_name = true;
764
break;
765
}
766
}
767
if(bad_name){
768
continue;
769
}
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
771
size_t suf_len = strlen(*suf);
772
if((d_name_len >= suf_len)
773
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
774
== 0)){
775
if(debug){
776
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
777
" with bad suffix %s\n", dirst->d_name, *suf);
778
}
779
bad_name = true;
780
break;
781
}
782
}
783
784
if(bad_name){
785
continue;
786
}
787
}
788
789
char *filename;
790
if(plugindir == NULL){
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
793
} else {
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
796
}
797
if(ret < 0){
798
perror("asprintf");
907
for(int i = 0; i < numplugins; i++){
908
909
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
if(plugin_fd == -1){
911
error(0, errno, "Could not open plugin");
912
free(direntries[i]);
799
913
continue;
800
914
}
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
803
916
if(ret == -1){
804
perror("stat");
805
free(filename);
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
806
920
continue;
807
921
}
808
922
809
923
/* Ignore non-executable files */
810
924
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
926
X_OK, 0)) != 0)){
812
927
if(debug){
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR,
931
direntries[i]->d_name);
815
932
}
816
free(filename);
933
close(plugin_fd);
934
free(direntries[i]);
817
935
continue;
818
936
}
819
937
820
plugin *p = getplugin(dirst->d_name);
938
plugin *p = getplugin(direntries[i]->d_name);
821
939
if(p == NULL){
822
perror("getplugin");
823
free(filename);
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
824
943
continue;
825
944
}
826
945
if(p->disabled){
827
946
if(debug){
828
947
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
829
dirst->d_name);
948
direntries[i]->d_name);
830
949
}
831
free(filename);
950
close(plugin_fd);
951
free(direntries[i]);
832
952
continue;
833
953
}
834
954
{
837
957
if(g != NULL){
838
958
for(char **a = g->argv + 1; *a != NULL; a++){
839
959
if(not add_argument(p, *a)){
840
perror("add_argument");
960
error(0, errno, "add_argument");
841
961
}
842
962
}
843
963
/* Add global environment variables */
844
964
for(char **e = g->environ; *e != NULL; e++){
845
965
if(not add_environment(p, *e, false)){
846
perror("add_environment");
966
error(0, errno, "add_environment");
847
967
}
848
968
}
849
969
}
850
970
}
851
/* If this plugin has any environment variables, we will call
852
using execve and need to duplicate the environment from this
853
process, too. */
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
854
973
if(p->environ[0] != NULL){
855
974
for(char **e = environ; *e != NULL; e++){
856
975
if(not add_environment(p, *e, false)){
857
perror("add_environment");
976
error(0, errno, "add_environment");
858
977
}
859
978
}
860
979
}
861
980
862
981
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
982
#ifndef O_CLOEXEC
983
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
984
#else /* O_CLOEXEC */
985
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
986
#endif /* O_CLOEXEC */
864
987
if(ret == -1){
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
988
error(0, errno, "pipe");
989
exitstatus = EX_OSERR;
990
free(direntries[i]);
991
goto fallback;
992
}
993
if(pipefd[0] >= FD_SETSIZE){
994
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
995
FD_SETSIZE);
996
close(pipefd[0]);
997
close(pipefd[1]);
998
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
#ifndef O_CLOEXEC
869
1003
/* Ask OS to automatic close the pipe on exec */
870
1004
ret = set_cloexec_flag(pipefd[0]);
871
1005
if(ret < 0){
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
874
1011
goto fallback;
875
1012
}
876
1013
ret = set_cloexec_flag(pipefd[1]);
877
1014
if(ret < 0){
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
880
1020
goto fallback;
881
1021
}
1022
#endif /* not O_CLOEXEC */
882
1023
/* Block SIGCHLD until process is safely in process list */
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1025
&sigchld_action.sa_mask,
1026
NULL));
886
1027
if(ret < 0){
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
889
1031
goto fallback;
890
1032
}
891
1033
/* Starting a new process to be watched */
892
1034
pid_t pid;
893
do{
1035
do {
894
1036
pid = fork();
895
}while(pid == -1 and errno == EINTR);
1037
} while(pid == -1 and errno == EINTR);
896
1038
if(pid == -1){
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1039
error(0, errno, "fork");
1040
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1041
&sigchld_action.sa_mask, NULL));
1042
close(pipefd[0]);
1043
close(pipefd[1]);
1044
exitstatus = EX_OSERR;
1045
free(direntries[i]);
899
1046
goto fallback;
900
1047
}
901
1048
if(pid == 0){
902
1049
/* this is the child process */
903
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
904
1051
if(ret < 0){
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
907
1054
}
908
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
1056
if(ret < 0){
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
912
1059
}
913
1060
914
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
1062
if(ret == -1){
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
918
1065
}
919
1066
920
if(dirfd(dir) < 0){
921
/* If dir has no file descriptor, we could not set FD_CLOEXEC
922
above and must now close it manually here. */
923
closedir(dir);
924
}
925
if(p->environ[0] == NULL){
926
if(execv(filename, p->argv) < 0){
927
perror("execv");
928
_exit(EXIT_FAILURE);
929
}
930
} else {
931
if(execve(filename, p->argv, p->environ) < 0){
932
perror("execve");
933
_exit(EXIT_FAILURE);
934
}
1067
if(fexecve(plugin_fd, p->argv,
1068
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1069
error(0, errno, "fexecve for %s/%s",
1070
plugindir != NULL ? plugindir : PDIR,
1071
direntries[i]->d_name);
1072
_exit(EX_OSERR);
935
1073
}
936
1074
/* no return */
937
1075
}
938
1076
/* Parent process */
939
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
940
pipe */
941
free(filename);
942
plugin *new_plugin = getplugin(dirst->d_name);
1077
close(pipefd[1]); /* Close unused write end of pipe */
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
943
1080
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1081
error(0, errno, "getplugin");
1082
ret = (int)(TEMP_FAILURE_RETRY
1083
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1084
NULL)));
948
1085
if(ret < 0){
949
perror("sigprocmask");
1086
error(0, errno, "sigprocmask");
950
1087
}
951
exitstatus = EXIT_FAILURE;
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
952
1090
goto fallback;
953
1091
}
1092
free(direntries[i]);
954
1093
955
1094
new_plugin->pid = pid;
956
1095
new_plugin->fd = pipefd[0];
957
1096
1097
if(debug){
1098
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1099
new_plugin->name, (intmax_t) (new_plugin->pid));
1100
}
1101
958
1102
/* Unblock SIGCHLD so signal handler can be run if this process
959
1103
has already completed */
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1104
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1105
&sigchld_action.sa_mask,
1106
NULL));
963
1107
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1108
error(0, errno, "sigprocmask");
1109
exitstatus = EX_OSERR;
966
1110
goto fallback;
967
1111
}
968
1112
973
1117
}
974
1118
}
975
1119
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1120
free(direntries);
1121
direntries = NULL;
1122
close(dir_fd);
1123
dir_fd = -1;
978
1124
free_plugin(getplugin(NULL));
979
1125
980
1126
for(plugin *p = plugin_list; p != NULL; p = p->next){
993
1139
fd_set rfds = rfds_all;
994
1140
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
995
1141
if(select_ret == -1 and errno != EINTR){
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1142
error(0, errno, "select");
1143
exitstatus = EX_OSERR;
998
1144
goto fallback;
999
1145
}
1000
1146
/* OK, now either a process completed, or something can be read
1019
1165
(intmax_t) (proc->pid),
1020
1166
WTERMSIG(proc->status),
1021
1167
strsignal(WTERMSIG(proc->status)));
1022
} else if(WCOREDUMP(proc->status)){
1023
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1024
" core\n", proc->name, (intmax_t) (proc->pid));
1025
1168
}
1026
1169
}
1027
1170
1029
1172
FD_CLR(proc->fd, &rfds_all);
1030
1173
1031
1174
/* Block signal while modifying process_list */
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1175
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1176
(SIG_BLOCK,
1177
&sigchld_action.sa_mask,
1178
NULL));
1035
1179
if(ret < 0){
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1180
error(0, errno, "sigprocmask");
1181
exitstatus = EX_OSERR;
1038
1182
goto fallback;
1039
1183
}
1040
1184
1043
1187
proc = next_plugin;
1044
1188
1045
1189
/* We are done modifying process list, so unblock signal */
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1190
ret = (int)(TEMP_FAILURE_RETRY
1191
(sigprocmask(SIG_UNBLOCK,
1192
&sigchld_action.sa_mask, NULL)));
1049
1193
if(ret < 0){
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1194
error(0, errno, "sigprocmask");
1195
exitstatus = EX_OSERR;
1052
1196
goto fallback;
1053
1197
}
1054
1198
1064
1208
bool bret = print_out_password(proc->buffer,
1065
1209
proc->buffer_length);
1066
1210
if(not bret){
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1211
error(0, errno, "print_out_password");
1212
exitstatus = EX_IOERR;
1069
1213
}
1070
1214
goto fallback;
1071
1215
}
1078
1222
}
1079
1223
/* Before reading, make the process' data buffer large enough */
1080
1224
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
1082
+ (size_t) BUFFER_SIZE);
1083
if(proc->buffer == NULL){
1084
perror("malloc");
1085
exitstatus = EXIT_FAILURE;
1225
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1226
+ (size_t) BUFFER_SIZE);
1227
if(new_buffer == NULL){
1228
error(0, errno, "malloc");
1229
exitstatus = EX_OSERR;
1086
1230
goto fallback;
1087
1231
}
1232
proc->buffer = new_buffer;
1088
1233
proc->buffer_size += BUFFER_SIZE;
1089
1234
}
1090
1235
/* Read from the process */
1109
1254
1110
1255
fallback:
1111
1256
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1257
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1258
and exitstatus != EX_OK)){
1113
1259
/* Fallback if all plugins failed, none are found or an error
1114
1260
occured */
1115
1261
bool bret;
1123
1269
}
1124
1270
bret = print_out_password(passwordbuffer, len);
1125
1271
if(not bret){
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1272
error(0, errno, "print_out_password");
1273
exitstatus = EX_IOERR;
1128
1274
}
1129
1275
}
1130
1276
1131
1277
/* Restore old signal handler */
1132
1278
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
1279
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1280
error(0, errno, "sigaction");
1281
exitstatus = EX_OSERR;
1136
1282
}
1137
1283
1138
1284
if(custom_argv != NULL){
1142
1288
free(custom_argv);
1143
1289
}
1144
1290
1145
if(dir != NULL){
1146
closedir(dir);
1291
free(direntries);
1292
1293
if(dir_fd != -1){
1294
close(dir_fd);
1147
1295
}
1148
1296
1149
1297
/* Kill the processes */
1153
1301
ret = kill(p->pid, SIGTERM);
1154
1302
if(ret == -1 and errno != ESRCH){
1155
1303
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1304
error(0, errno, "kill");
1157
1305
}
1158
1306
}
1159
1307
}
1160
1308
1161
1309
/* Wait for any remaining child processes to terminate */
1162
do{
1310
do {
1163
1311
ret = wait(NULL);
1164
1312
} while(ret >= 0);
1165
1313
if(errno != ECHILD){
1166
perror("wait");
1314
error(0, errno, "wait");
1167
1315
}
1168
1316
1169
1317
free_plugin_list();
1170
1318
1171
1319
free(plugindir);
1320
free(pluginhelperdir);
1172
1321
free(argfile);
1173
1322
1174
1323
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0