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- Committer: Teddy Hogeborn
- Date: 2024-09-16 21:01:52 UTC
- Revision ID: teddy@recompile.se-20240916210152-0xbv4b15jyho9ydk
Override lintian experimental tag "executable-in-usr-lib"
Lintian reports executable files in /usr/lib, since binaries which are
executed internally are supposed to be stored in /usr/libexec. But
the executables we store in /usr/lib are all files to be copied into
the initial RAM disk image, and are never executed from their storage
location in /usr/lib. Except one; the Dracut module-setup.sh file.
But that file seems to be required to be executable; the
module-setup.sh file of every other Dracut module is also an
executable file.
* debian/mandos-client.lintian-overrides: Override experimental tag
"executable-in-usr-lib" about files which are not actually executed
from this location, and only exist to be copied to the initial RAM
disk image. Also the Dracut module-setup.sh file, which merely
follows the pattern of all other Dracut module-setup.sh files from
other Dracut modules.
Lintian reports executable files in /usr/lib, since binaries which are
executed internally are supposed to be stored in /usr/libexec. But
the executables we store in /usr/lib are all files to be copied into
the initial RAM disk image, and are never executed from their storage
location in /usr/lib. Except one; the Dracut module-setup.sh file.
But that file seems to be required to be executable; the
module-setup.sh file of every other Dracut module is also an
executable file.
* debian/mandos-client.lintian-overrides: Override experimental tag
"executable-in-usr-lib" about files which are not actually executed
from this location, and only exist to be copied to the initial RAM
disk image. Also the Dracut module-setup.sh file, which merely
follows the pattern of all other Dracut module-setup.sh files from
other Dracut modules.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2022 Teddy Hogeborn
6
* Copyright © 2008-2022 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
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
27
getline(), asprintf(), O_CLOEXEC,
28
scandirat(), pipe2() */
29
#include <argp.h> /* argp_program_version,
30
argp_program_bug_address,
31
struct argp_option,
32
struct argp_state, argp_error(),
33
ARGP_NO_EXIT, argp_state_help,
34
ARGP_HELP_STD_HELP,
35
ARGP_HELP_USAGE, ARGP_HELP_EXIT_OK,
36
ARGP_KEY_ARG, ARGP_ERR_UNKNOWN,
37
struct argp, argp_parse(),
38
ARGP_IN_ORDER, ARGP_NO_HELP */
39
#include <stdbool.h> /* bool, false, true */
40
#include <sys/types.h> /* pid_t, sig_atomic_t, uid_t, gid_t,
41
getuid(), setgid(), setuid() */
27
42
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
#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() */
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
FD_SET(), FD_ISSET(), FD_CLR */
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
#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() */
43
#include <iso646.h> /* or, and, not */
44
#include <string.h> /* strcmp(), strdup(), strchrnul(),
45
strncmp(), strlen(), strcpy(),
46
strsep(), strchr(), strsignal() */
47
#include <stdlib.h> /* malloc(), free(), reallocarray(),
48
realloc(), EXIT_SUCCESS */
49
#include <errno.h> /* errno, EINTR, ENOMEM, ECHILD,
50
error_t, EINVAL, EMFILE, ENFILE,
51
ENOENT, ESRCH */
52
#include <stdint.h> /* SIZE_MAX */
53
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
54
getline(), asprintf(), O_CLOEXEC,
55
scandirat(), pipe2() */
56
#include <unistd.h> /* TEMP_FAILURE_RETRY(), ssize_t,
57
write(), STDOUT_FILENO, uid_t,
58
gid_t, getuid(), fchown(), close(),
59
symlink(), setgid(), setuid(),
60
faccessat(), X_OK, pipe(), pipe2(),
61
fork(), _exit(), dup2(), fexecve(),
62
read(), getpass() */
54
63
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
58
#include <errno.h> /* errno */
59
#include <argp.h> /* struct argp_option, struct
60
argp_state, struct argp,
61
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
64
#include <signal.h> /* struct sigaction, sigemptyset(),
65
sigaddset(), sigaction(),
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
64
FD_CLOEXEC, open(), O_RDONLY,
65
O_CLOEXEC, openat() */
66
#include <sys/wait.h> /* waitpid(), WNOHANG, WIFEXITED(),
67
WEXITSTATUS(), WIFSIGNALED(),
68
WTERMSIG(), wait() */
69
#include <error.h> /* error() */
70
#include <stdio.h> /* FILE, fprintf(), fopen(),
71
getline(), fclose(), EOF,
72
asprintf(), stderr */
73
#include <dirent.h> /* struct dirent, scandirat(),
74
alphasort() */
75
#include <sys/stat.h> /* struct stat, fstat(), S_ISDIR(),
76
lstat(), S_ISREG() */
77
#include <sys/select.h> /* fd_set, FD_ZERO(), FD_SETSIZE,
78
FD_SET(), select(), FD_CLR(),
79
FD_ISSET() */
80
#include <signal.h> /* struct sigaction, SA_NOCLDSTOP,
81
sigemptyset(), sigaddset(),
82
SIGCHLD, sigprocmask(), SIG_BLOCK,
83
SIG_UNBLOCK, kill(), SIGTERM */
84
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
85
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
86
#include <inttypes.h> /* intmax_t, strtoimax(), PRIdMAX */
87
#include <fnmatch.h> /* fnmatch(), FNM_FILE_NAME,
88
FNM_PERIOD, FNM_NOMATCH */
71
89
72
90
#define BUFFER_SIZE 256
73
91
74
92
#define PDIR "/lib/mandos/plugins.d"
93
#define PHDIR "/lib/mandos/plugin-helpers"
75
94
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
95
77
96
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
97
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
98
80
99
typedef struct plugin{
81
100
char *name; /* can be NULL or any plugin name */
101
120
102
121
/* Gets an existing plugin based on name,
103
122
or if none is found, creates a new one */
123
__attribute__((warn_unused_result))
104
124
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
125
/* Check for existing plugin with that name */
106
126
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
127
if((p->name == name)
108
128
or (p->name and name and (strcmp(p->name, name) == 0))){
123
143
copy_name = strdup(name);
124
144
} while(copy_name == NULL and errno == EINTR);
125
145
if(copy_name == NULL){
146
int e = errno;
126
147
free(new_plugin);
148
errno = e;
127
149
return NULL;
128
150
}
129
151
}
137
159
new_plugin->argv = malloc(sizeof(char *) * 2);
138
160
} while(new_plugin->argv == NULL and errno == EINTR);
139
161
if(new_plugin->argv == NULL){
162
int e = errno;
140
163
free(copy_name);
141
164
free(new_plugin);
165
errno = e;
142
166
return NULL;
143
167
}
144
168
new_plugin->argv[0] = copy_name;
148
172
new_plugin->environ = malloc(sizeof(char *));
149
173
} while(new_plugin->environ == NULL and errno == EINTR);
150
174
if(new_plugin->environ == NULL){
175
int e = errno;
151
176
free(copy_name);
152
177
free(new_plugin->argv);
153
178
free(new_plugin);
179
errno = e;
154
180
return NULL;
155
181
}
156
182
new_plugin->environ[0] = NULL;
161
187
}
162
188
163
189
/* Helper function for add_argument and add_environment */
190
__attribute__((nonnull, warn_unused_result))
164
191
static bool add_to_char_array(const char *new, char ***array,
165
192
int *len){
166
193
/* Resize the pointed-to array to hold one more pointer */
194
char **new_array = NULL;
167
195
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
196
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
197
new_array = reallocarray(*array, (size_t)((*len) + 2),
198
sizeof(char *));
199
#else
200
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
201
/* overflow */
202
new_array = NULL;
203
errno = ENOMEM;
204
} else {
205
new_array = realloc(*array, (size_t)((*len) + 2)
206
* sizeof(char *));
207
}
208
#endif
209
} while(new_array == NULL and errno == EINTR);
171
210
/* Malloc check */
172
if(*array == NULL){
211
if(new_array == NULL){
173
212
return false;
174
213
}
214
*array = new_array;
175
215
/* Make a copy of the new string */
176
216
char *copy;
177
217
do {
189
229
}
190
230
191
231
/* Add to a plugin's argument vector */
232
__attribute__((nonnull(2), warn_unused_result))
192
233
static bool add_argument(plugin *p, const char *arg){
193
234
if(p == NULL){
194
235
return false;
197
238
}
198
239
199
240
/* Add to a plugin's environment */
241
__attribute__((nonnull(2), warn_unused_result))
200
242
static bool add_environment(plugin *p, const char *def, bool replace){
201
243
if(p == NULL){
202
244
return false;
204
246
/* namelen = length of name of environment variable */
205
247
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
248
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
249
for(char **envdef = p->environ; *envdef != NULL; envdef++){
250
if(strncmp(*envdef, def, namelen + 1) == 0){
209
251
/* It already exists */
210
252
if(replace){
211
char *new;
253
char *new_envdef;
212
254
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
255
new_envdef = realloc(*envdef, strlen(def) + 1);
256
} while(new_envdef == NULL and errno == EINTR);
257
if(new_envdef == NULL){
216
258
return false;
217
259
}
218
*e = new;
219
strcpy(*e, def);
260
*envdef = new_envdef;
261
strcpy(*envdef, def);
220
262
}
221
263
return true;
222
264
}
224
266
return add_to_char_array(def, &(p->environ), &(p->envc));
225
267
}
226
268
269
#ifndef O_CLOEXEC
227
270
/*
228
271
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
272
* Descriptor Flags".
230
273
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
274
*/
275
__attribute__((warn_unused_result))
232
276
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
277
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
278
/* If reading the flags failed, return error indication now. */
235
279
if(ret < 0){
236
280
return ret;
237
281
}
238
282
/* Store modified flag word in the descriptor. */
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
283
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
284
ret | FD_CLOEXEC));
240
285
}
286
#endif /* not O_CLOEXEC */
241
287
242
288
243
289
/* Mark processes as completed when they exit, and save their exit
257
303
/* No child processes */
258
304
break;
259
305
}
260
perror("waitpid");
306
error(0, errno, "waitpid");
261
307
}
262
308
263
309
/* A child exited, find it in process_list */
275
321
}
276
322
277
323
/* Prints out a password to stdout */
324
__attribute__((nonnull, warn_unused_result))
278
325
static bool print_out_password(const char *buffer, size_t length){
279
326
ssize_t ret;
280
327
for(size_t written = 0; written < length; written += (size_t)ret){
288
335
}
289
336
290
337
/* Removes and free a plugin from the plugin list */
338
__attribute__((nonnull))
291
339
static void free_plugin(plugin *plugin_node){
292
340
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
342
free(*arg);
295
343
}
344
free(plugin_node->name);
296
345
free(plugin_node->argv);
297
346
for(char **env = plugin_node->environ; *env != NULL; env++){
298
347
free(*env);
325
374
326
375
int main(int argc, char *argv[]){
327
376
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
328
378
char *argfile = NULL;
329
379
FILE *conffp;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
380
struct dirent **direntries = NULL;
333
381
struct stat st;
334
382
fd_set rfds_all;
335
383
int ret, maxfd = 0;
343
391
.sa_flags = SA_NOCLDSTOP };
344
392
char **custom_argv = NULL;
345
393
int custom_argc = 0;
394
int dir_fd = -1;
346
395
347
396
/* Establish a signal handler */
348
397
sigemptyset(&sigchld_action.sa_mask);
349
398
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
350
399
if(ret == -1){
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
400
error(0, errno, "sigaddset");
401
exitstatus = EX_OSERR;
353
402
goto fallback;
354
403
}
355
404
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
356
405
if(ret == -1){
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
406
error(0, errno, "sigaction");
407
exitstatus = EX_OSERR;
359
408
goto fallback;
360
409
}
361
410
393
442
.doc = "Group ID the plugins will run as", .group = 3 },
394
443
{ .name = "debug", .key = 132,
395
444
.doc = "Debug mode", .group = 4 },
445
{ .name = "plugin-helper-dir", .key = 133,
446
.arg = "DIRECTORY",
447
.doc = "Specify a different plugin helper directory",
448
.group = 2 },
449
/*
450
* These reproduce what we would get without ARGP_NO_HELP
451
*/
452
{ .name = "help", .key = '?',
453
.doc = "Give this help list", .group = -1 },
454
{ .name = "usage", .key = -3,
455
.doc = "Give a short usage message", .group = -1 },
456
{ .name = "version", .key = 'V',
457
.doc = "Print program version", .group = -1 },
396
458
{ .name = NULL }
397
459
};
398
460
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
461
__attribute__((nonnull(3)))
462
error_t parse_opt(int key, char *arg, struct argp_state *state){
463
errno = 0;
401
464
switch(key){
402
465
char *tmp;
403
intmax_t tmpmax;
466
intmax_t tmp_id;
404
467
case 'g': /* --global-options */
405
if(arg != NULL){
468
{
406
469
char *plugin_option;
407
470
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
471
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
472
break;
414
473
}
415
474
}
475
errno = 0;
416
476
}
417
477
break;
418
478
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
479
if(add_environment(getplugin(NULL), arg, true)){
480
errno = 0;
424
481
}
425
482
break;
426
483
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;
484
{
485
char *option_list = strchr(arg, ':');
486
if(option_list == NULL){
487
argp_error(state, "No colon in \"%s\"", arg);
488
errno = EINVAL;
489
break;
490
}
491
*option_list = '\0';
492
option_list++;
493
if(arg[0] == '\0'){
494
argp_error(state, "Empty plugin name");
495
errno = EINVAL;
496
break;
497
}
498
char *option;
499
while((option = strsep(&option_list, ",")) != NULL){
500
if(not add_argument(getplugin(arg), option)){
501
break;
437
502
}
438
503
}
504
errno = 0;
439
505
}
440
506
break;
441
507
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
508
{
446
509
char *envdef = strchr(arg, ':');
447
510
if(envdef == NULL){
511
argp_error(state, "No colon in \"%s\"", arg);
512
errno = EINVAL;
448
513
break;
449
514
}
450
515
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
516
envdef++;
517
if(arg[0] == '\0'){
518
argp_error(state, "Empty plugin name");
519
errno = EINVAL;
520
break;
521
}
522
if(add_environment(getplugin(arg), envdef, true)){
523
errno = 0;
453
524
}
454
525
}
455
526
break;
456
527
case 'd': /* --disable */
457
if(arg != NULL){
528
{
458
529
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
530
if(p != NULL){
531
p->disabled = true;
532
errno = 0;
461
533
}
462
p->disabled = true;
463
534
}
464
535
break;
465
536
case 'e': /* --enable */
466
if(arg != NULL){
537
{
467
538
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
539
if(p != NULL){
540
p->disabled = false;
541
errno = 0;
470
542
}
471
p->disabled = false;
472
543
}
473
544
break;
474
545
case 128: /* --plugin-dir */
475
546
free(plugindir);
476
547
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
548
if(plugindir != NULL){
549
errno = 0;
479
550
}
480
551
break;
481
552
case 129: /* --config-file */
482
553
/* This is already done by parse_opt_config_file() */
483
554
break;
484
555
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
556
tmp_id = strtoimax(arg, &tmp, 10);
487
557
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;
558
or tmp_id != (uid_t)tmp_id){
559
argp_error(state, "Bad user ID number: \"%s\", using %"
560
PRIdMAX, arg, (intmax_t)uid);
561
break;
493
562
}
563
uid = (uid_t)tmp_id;
564
errno = 0;
494
565
break;
495
566
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
567
tmp_id = strtoimax(arg, &tmp, 10);
498
568
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;
569
or tmp_id != (gid_t)tmp_id){
570
argp_error(state, "Bad group ID number: \"%s\", using %"
571
PRIdMAX, arg, (intmax_t)gid);
572
break;
504
573
}
574
gid = (gid_t)tmp_id;
575
errno = 0;
505
576
break;
506
577
case 132: /* --debug */
507
578
debug = true;
508
579
break;
580
case 133: /* --plugin-helper-dir */
581
free(pluginhelperdir);
582
pluginhelperdir = strdup(arg);
583
if(pluginhelperdir != NULL){
584
errno = 0;
585
}
586
break;
587
/*
588
* These reproduce what we would get without ARGP_NO_HELP
589
*/
590
case '?': /* --help */
591
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
592
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
593
__builtin_unreachable();
594
case -3: /* --usage */
595
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
596
argp_state_help(state, state->out_stream,
597
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
598
__builtin_unreachable();
599
case 'V': /* --version */
600
fprintf(state->out_stream, "%s\n", argp_program_version);
601
exit(EXIT_SUCCESS);
602
break;
509
603
/*
510
604
* When adding more options before this line, remember to also add a
511
605
* "case" to the "parse_opt_config_file" function below.
514
608
/* Cryptsetup always passes an argument, which is an empty
515
609
string if "none" was specified in /etc/crypttab. So if
516
610
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
611
if(arg[0] == '\0'){
612
break;
519
613
}
520
break;
521
case ARGP_KEY_END:
522
break;
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
523
619
default:
524
620
return ARGP_ERR_UNKNOWN;
525
621
}
526
return 0;
622
return errno; /* Set to 0 at start */
527
623
}
528
624
529
625
/* This option parser is the same as parse_opt() above, except it
531
627
error_t parse_opt_config_file(int key, char *arg,
532
628
__attribute__((unused))
533
629
struct argp_state *state){
630
errno = 0;
534
631
switch(key){
535
632
case 'g': /* --global-options */
536
633
case 'G': /* --global-env */
543
640
case 129: /* --config-file */
544
641
free(argfile);
545
642
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
643
if(argfile != NULL){
644
errno = 0;
548
645
}
549
646
break;
550
647
case 130: /* --userid */
551
648
case 131: /* --groupid */
552
649
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
651
case '?': /* --help */
652
case -3: /* --usage */
653
case 'V': /* --version */
553
654
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
655
break;
556
656
default:
557
657
return ARGP_ERR_UNKNOWN;
558
658
}
559
return 0;
659
return errno;
560
660
}
561
661
562
662
struct argp argp = { .options = options,
566
666
567
667
/* Parse using parse_opt_config_file() in order to get the custom
568
668
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;
669
ret = argp_parse(&argp, argc, argv,
670
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
671
NULL, NULL);
672
switch(ret){
673
case 0:
674
break;
675
case ENOMEM:
676
default:
677
errno = ret;
678
error(0, errno, "argp_parse");
679
exitstatus = EX_OSERR;
680
goto fallback;
681
case EINVAL:
682
exitstatus = EX_USAGE;
573
683
goto fallback;
574
684
}
575
685
592
702
custom_argc = 1;
593
703
custom_argv = malloc(sizeof(char*) * 2);
594
704
if(custom_argv == NULL){
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
705
error(0, errno, "malloc");
706
exitstatus = EX_OSERR;
597
707
goto fallback;
598
708
}
599
709
custom_argv[0] = argv[0];
615
725
}
616
726
new_arg = strdup(p);
617
727
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
728
error(0, errno, "strdup");
729
exitstatus = EX_OSERR;
620
730
free(org_line);
621
731
goto fallback;
622
732
}
623
733
624
734
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;
735
{
736
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
737
char **new_argv = reallocarray(custom_argv,
738
(size_t)custom_argc + 1,
739
sizeof(char *));
740
#else
741
char **new_argv = NULL;
742
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
743
/* overflow */
744
errno = ENOMEM;
745
} else {
746
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
747
* sizeof(char *));
748
}
749
#endif
750
if(new_argv == NULL){
751
error(0, errno, "reallocarray");
752
exitstatus = EX_OSERR;
753
free(new_arg);
754
free(org_line);
755
goto fallback;
756
} else {
757
custom_argv = new_argv;
758
}
632
759
}
633
760
custom_argv[custom_argc-1] = new_arg;
634
761
custom_argv[custom_argc] = NULL;
638
765
ret = fclose(conffp);
639
766
} while(ret == EOF and errno == EINTR);
640
767
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
768
error(0, errno, "fclose");
769
exitstatus = EX_IOERR;
643
770
goto fallback;
644
771
}
645
772
free(org_line);
647
774
/* Check for harmful errors and go to fallback. Other errors might
648
775
not affect opening plugins */
649
776
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
777
error(0, errno, "fopen");
778
exitstatus = EX_OSERR;
652
779
goto fallback;
653
780
}
654
781
}
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
782
/* If there were any arguments from the configuration file, pass
783
them to parser as command line arguments */
657
784
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;
785
ret = argp_parse(&argp, custom_argc, custom_argv,
786
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
787
NULL, NULL);
788
switch(ret){
789
case 0:
790
break;
791
case ENOMEM:
792
default:
793
errno = ret;
794
error(0, errno, "argp_parse");
795
exitstatus = EX_OSERR;
796
goto fallback;
797
case EINVAL:
798
exitstatus = EX_CONFIG;
663
799
goto fallback;
664
800
}
665
801
}
666
802
667
803
/* Parse actual command line arguments, to let them override the
668
804
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;
805
ret = argp_parse(&argp, argc, argv,
806
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
807
NULL, NULL);
808
switch(ret){
809
case 0:
810
break;
811
case ENOMEM:
812
default:
813
errno = ret;
814
error(0, errno, "argp_parse");
815
exitstatus = EX_OSERR;
816
goto fallback;
817
case EINVAL:
818
exitstatus = EX_USAGE;
819
goto fallback;
820
}
821
822
{
823
char *pluginhelperenv;
824
bool bret = true;
825
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
826
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
827
if(ret != -1){
828
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
829
}
830
if(ret == -1 or not bret){
831
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
832
" environment variable to \"%s\" for all plugins\n",
833
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
834
}
835
if(ret != -1){
836
free(pluginhelperenv);
837
}
674
838
}
675
839
676
840
if(debug){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
841
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
842
fprintf(stderr, "Plugin: %s has %d arguments\n",
679
843
p->name ? p->name : "Global", p->argc - 1);
680
844
for(char **a = p->argv; *a != NULL; a++){
687
851
}
688
852
}
689
853
690
/* Strip permissions down to nobody */
691
setgid(gid);
854
if(getuid() == 0){
855
/* Work around Debian bug #633582:
856
<https://bugs.debian.org/633582> */
857
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
858
if(plugindir_fd == -1){
859
if(errno != ENOENT){
860
error(0, errno, "open(\"" PDIR "\")");
861
}
862
} else {
863
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
864
if(ret == -1){
865
error(0, errno, "fstat");
866
} else {
867
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
868
ret = fchown(plugindir_fd, uid, gid);
869
if(ret == -1){
870
error(0, errno, "fchown");
871
}
872
}
873
}
874
close(plugindir_fd);
875
}
876
877
/* Work around Debian bug #981302
878
<https://bugs.debian.org/981302> */
879
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
880
ret = symlink("/proc/self/fd", "/dev/fd");
881
if(ret == -1){
882
error(0, errno, "Failed to create /dev/fd symlink");
883
}
884
}
885
}
886
887
/* Lower permissions */
888
ret = setgid(gid);
692
889
if(ret == -1){
693
perror("setgid");
890
error(0, errno, "setgid");
694
891
}
695
892
ret = setuid(uid);
696
893
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 */
894
error(0, errno, "setuid");
895
}
896
897
/* Open plugin directory with close_on_exec flag */
713
898
{
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;
899
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
900
#ifdef O_CLOEXEC
901
O_CLOEXEC
902
#else /* not O_CLOEXEC */
903
0
904
#endif /* not O_CLOEXEC */
905
);
906
if(dir_fd == -1){
907
error(0, errno, "Could not open plugin dir");
908
exitstatus = EX_UNAVAILABLE;
909
goto fallback;
910
}
911
912
#ifndef O_CLOEXEC
913
/* Set the FD_CLOEXEC flag on the directory */
914
ret = set_cloexec_flag(dir_fd);
915
if(ret < 0){
916
error(0, errno, "set_cloexec_flag");
917
exitstatus = EX_OSERR;
918
goto fallback;
919
}
920
#endif /* O_CLOEXEC */
921
}
922
923
int good_name(const struct dirent * const dirent){
924
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
925
"*.dpkg-old", "*.dpkg-bak",
926
"*.dpkg-divert", NULL };
927
#ifdef __GNUC__
928
#pragma GCC diagnostic push
929
#pragma GCC diagnostic ignored "-Wcast-qual"
930
#endif
931
for(const char **pat = (const char **)patterns;
932
*pat != NULL; pat++){
933
#ifdef __GNUC__
934
#pragma GCC diagnostic pop
935
#endif
936
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
937
!= FNM_NOMATCH){
938
if(debug){
939
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
940
" matching pattern %s\n", dirent->d_name, *pat);
941
}
942
return 0;
721
943
}
722
944
}
945
return 1;
946
}
947
948
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
949
alphasort);
950
if(numplugins == -1){
951
error(0, errno, "Could not scan plugin dir");
952
direntries = NULL;
953
exitstatus = EX_OSERR;
954
goto fallback;
723
955
}
724
956
725
957
FD_ZERO(&rfds_all);
726
958
727
959
/* 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");
960
for(int i = 0; i < numplugins; i++){
961
962
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
963
if(plugin_fd == -1){
964
error(0, errno, "Could not open plugin");
965
free(direntries[i]);
799
966
continue;
800
967
}
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
968
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
803
969
if(ret == -1){
804
perror("stat");
805
free(filename);
970
error(0, errno, "stat");
971
close(plugin_fd);
972
free(direntries[i]);
806
973
continue;
807
974
}
808
975
809
976
/* Ignore non-executable files */
810
977
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
978
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
979
X_OK, 0)) != 0)){
812
980
if(debug){
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
981
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
982
" with bad type or mode\n",
983
plugindir != NULL ? plugindir : PDIR,
984
direntries[i]->d_name);
815
985
}
816
free(filename);
986
close(plugin_fd);
987
free(direntries[i]);
817
988
continue;
818
989
}
819
990
820
plugin *p = getplugin(dirst->d_name);
991
plugin *p = getplugin(direntries[i]->d_name);
821
992
if(p == NULL){
822
perror("getplugin");
823
free(filename);
993
error(0, errno, "getplugin");
994
close(plugin_fd);
995
free(direntries[i]);
824
996
continue;
825
997
}
826
998
if(p->disabled){
827
999
if(debug){
828
1000
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
829
dirst->d_name);
1001
direntries[i]->d_name);
830
1002
}
831
free(filename);
1003
close(plugin_fd);
1004
free(direntries[i]);
832
1005
continue;
833
1006
}
834
1007
{
837
1010
if(g != NULL){
838
1011
for(char **a = g->argv + 1; *a != NULL; a++){
839
1012
if(not add_argument(p, *a)){
840
perror("add_argument");
1013
error(0, errno, "add_argument");
841
1014
}
842
1015
}
843
1016
/* Add global environment variables */
844
1017
for(char **e = g->environ; *e != NULL; e++){
845
1018
if(not add_environment(p, *e, false)){
846
perror("add_environment");
1019
error(0, errno, "add_environment");
847
1020
}
848
1021
}
849
1022
}
850
1023
}
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. */
1024
/* If this plugin has any environment variables, we need to
1025
duplicate the environment from this process, too. */
854
1026
if(p->environ[0] != NULL){
855
1027
for(char **e = environ; *e != NULL; e++){
856
1028
if(not add_environment(p, *e, false)){
857
perror("add_environment");
1029
error(0, errno, "add_environment");
858
1030
}
859
1031
}
860
1032
}
861
1033
862
1034
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
1035
#ifndef O_CLOEXEC
1036
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1037
#else /* O_CLOEXEC */
1038
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1039
#endif /* O_CLOEXEC */
864
1040
if(ret == -1){
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
1041
error(0, errno, "pipe");
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
1044
goto fallback;
1045
}
1046
if(pipefd[0] >= FD_SETSIZE){
1047
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1048
FD_SETSIZE);
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
1053
goto fallback;
1054
}
1055
#ifndef O_CLOEXEC
869
1056
/* Ask OS to automatic close the pipe on exec */
870
1057
ret = set_cloexec_flag(pipefd[0]);
871
1058
if(ret < 0){
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1059
error(0, errno, "set_cloexec_flag");
1060
close(pipefd[0]);
1061
close(pipefd[1]);
1062
exitstatus = EX_OSERR;
1063
free(direntries[i]);
874
1064
goto fallback;
875
1065
}
876
1066
ret = set_cloexec_flag(pipefd[1]);
877
1067
if(ret < 0){
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1068
error(0, errno, "set_cloexec_flag");
1069
close(pipefd[0]);
1070
close(pipefd[1]);
1071
exitstatus = EX_OSERR;
1072
free(direntries[i]);
880
1073
goto fallback;
881
1074
}
1075
#endif /* not O_CLOEXEC */
882
1076
/* Block SIGCHLD until process is safely in process list */
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1077
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1078
&sigchld_action.sa_mask,
1079
NULL));
886
1080
if(ret < 0){
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1081
error(0, errno, "sigprocmask");
1082
exitstatus = EX_OSERR;
1083
free(direntries[i]);
889
1084
goto fallback;
890
1085
}
891
1086
/* Starting a new process to be watched */
894
1089
pid = fork();
895
1090
} while(pid == -1 and errno == EINTR);
896
1091
if(pid == -1){
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1092
error(0, errno, "fork");
1093
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1094
&sigchld_action.sa_mask, NULL));
1095
close(pipefd[0]);
1096
close(pipefd[1]);
1097
exitstatus = EX_OSERR;
1098
free(direntries[i]);
899
1099
goto fallback;
900
1100
}
901
1101
if(pid == 0){
902
1102
/* this is the child process */
903
1103
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
904
1104
if(ret < 0){
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1105
error(0, errno, "sigaction");
1106
_exit(EX_OSERR);
907
1107
}
908
1108
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
1109
if(ret < 0){
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1110
error(0, errno, "sigprocmask");
1111
_exit(EX_OSERR);
912
1112
}
913
1113
914
1114
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
1115
if(ret == -1){
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1116
error(0, errno, "dup2");
1117
_exit(EX_OSERR);
918
1118
}
919
1119
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
}
1120
if(fexecve(plugin_fd, p->argv,
1121
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1122
error(0, errno, "fexecve for %s/%s",
1123
plugindir != NULL ? plugindir : PDIR,
1124
direntries[i]->d_name);
1125
_exit(EX_OSERR);
935
1126
}
936
1127
/* no return */
937
1128
}
938
1129
/* 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);
1130
close(pipefd[1]); /* Close unused write end of pipe */
1131
close(plugin_fd);
1132
plugin *new_plugin = getplugin(direntries[i]->d_name);
943
1133
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1134
error(0, errno, "getplugin");
1135
ret = (int)(TEMP_FAILURE_RETRY
1136
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1137
NULL)));
948
1138
if(ret < 0){
949
perror("sigprocmask");
1139
error(0, errno, "sigprocmask");
950
1140
}
951
exitstatus = EXIT_FAILURE;
1141
exitstatus = EX_OSERR;
1142
free(direntries[i]);
952
1143
goto fallback;
953
1144
}
1145
free(direntries[i]);
954
1146
955
1147
new_plugin->pid = pid;
956
1148
new_plugin->fd = pipefd[0];
957
1149
1150
if(debug){
1151
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1152
new_plugin->name, (intmax_t) (new_plugin->pid));
1153
}
1154
958
1155
/* Unblock SIGCHLD so signal handler can be run if this process
959
1156
has already completed */
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1157
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1158
&sigchld_action.sa_mask,
1159
NULL));
963
1160
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1161
error(0, errno, "sigprocmask");
1162
exitstatus = EX_OSERR;
966
1163
goto fallback;
967
1164
}
968
1165
973
1170
}
974
1171
}
975
1172
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1173
free(direntries);
1174
direntries = NULL;
1175
close(dir_fd);
1176
dir_fd = -1;
978
1177
free_plugin(getplugin(NULL));
979
1178
980
1179
for(plugin *p = plugin_list; p != NULL; p = p->next){
993
1192
fd_set rfds = rfds_all;
994
1193
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
995
1194
if(select_ret == -1 and errno != EINTR){
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1195
error(0, errno, "select");
1196
exitstatus = EX_OSERR;
998
1197
goto fallback;
999
1198
}
1000
1199
/* OK, now either a process completed, or something can be read
1019
1218
(intmax_t) (proc->pid),
1020
1219
WTERMSIG(proc->status),
1021
1220
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
1221
}
1026
1222
}
1027
1223
1029
1225
FD_CLR(proc->fd, &rfds_all);
1030
1226
1031
1227
/* Block signal while modifying process_list */
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1228
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1229
(SIG_BLOCK,
1230
&sigchld_action.sa_mask,
1231
NULL));
1035
1232
if(ret < 0){
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1233
error(0, errno, "sigprocmask");
1234
exitstatus = EX_OSERR;
1038
1235
goto fallback;
1039
1236
}
1040
1237
1043
1240
proc = next_plugin;
1044
1241
1045
1242
/* We are done modifying process list, so unblock signal */
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1243
ret = (int)(TEMP_FAILURE_RETRY
1244
(sigprocmask(SIG_UNBLOCK,
1245
&sigchld_action.sa_mask, NULL)));
1049
1246
if(ret < 0){
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1247
error(0, errno, "sigprocmask");
1248
exitstatus = EX_OSERR;
1052
1249
goto fallback;
1053
1250
}
1054
1251
1064
1261
bool bret = print_out_password(proc->buffer,
1065
1262
proc->buffer_length);
1066
1263
if(not bret){
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1264
error(0, errno, "print_out_password");
1265
exitstatus = EX_IOERR;
1069
1266
}
1070
1267
goto fallback;
1071
1268
}
1078
1275
}
1079
1276
/* Before reading, make the process' data buffer large enough */
1080
1277
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;
1278
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1279
+ (size_t) BUFFER_SIZE);
1280
if(new_buffer == NULL){
1281
error(0, errno, "malloc");
1282
exitstatus = EX_OSERR;
1086
1283
goto fallback;
1087
1284
}
1285
proc->buffer = new_buffer;
1088
1286
proc->buffer_size += BUFFER_SIZE;
1089
1287
}
1090
1288
/* Read from the process */
1109
1307
1110
1308
fallback:
1111
1309
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1310
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1311
and exitstatus != EX_OK)){
1113
1312
/* Fallback if all plugins failed, none are found or an error
1114
1313
occured */
1115
1314
bool bret;
1123
1322
}
1124
1323
bret = print_out_password(passwordbuffer, len);
1125
1324
if(not bret){
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1325
error(0, errno, "print_out_password");
1326
exitstatus = EX_IOERR;
1128
1327
}
1129
1328
}
1130
1329
1131
1330
/* Restore old signal handler */
1132
1331
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
1332
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1333
error(0, errno, "sigaction");
1334
exitstatus = EX_OSERR;
1136
1335
}
1137
1336
1138
1337
if(custom_argv != NULL){
1142
1341
free(custom_argv);
1143
1342
}
1144
1343
1145
if(dir != NULL){
1146
closedir(dir);
1344
free(direntries);
1345
1346
if(dir_fd != -1){
1347
close(dir_fd);
1147
1348
}
1148
1349
1149
1350
/* Kill the processes */
1153
1354
ret = kill(p->pid, SIGTERM);
1154
1355
if(ret == -1 and errno != ESRCH){
1155
1356
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1357
error(0, errno, "kill");
1157
1358
}
1158
1359
}
1159
1360
}
1163
1364
ret = wait(NULL);
1164
1365
} while(ret >= 0);
1165
1366
if(errno != ECHILD){
1166
perror("wait");
1367
error(0, errno, "wait");
1167
1368
}
1168
1369
1169
1370
free_plugin_list();
1170
1371
1171
1372
free(plugindir);
1373
free(pluginhelperdir);
1172
1374
free(argfile);
1173
1375
1174
1376
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0