To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 1193
- compare with another revision
- download diff
- download tarball
- view history from revision 1193
- Committer: teddy at recompile
- Date: 2019-12-04 23:52:20 UTC
- Revision ID: teddy@recompile.se-20191204235220-yn88brp0scmqwy2t
Remove non-project-specific pattern from .bzrignore
Only project-specific patterns should be in the .bzrignore file.
Other generic patterns should be in the ~/.config/breezy/ignore and
~/.bazaar/ignore files.
* .bzrignore (.tramp_history): Remove.
Only project-specific patterns should be in the .bzrignore file.
Other generic patterns should be in the ~/.config/breezy/ignore and
~/.bazaar/ignore files.
* .bzrignore (.tramp_history): Remove.
- 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
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
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))){
110
116
}
111
117
}
112
118
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
114
123
if(new_plugin == NULL){
115
124
return NULL;
116
125
}
117
126
char *copy_name = NULL;
118
127
if(name != NULL){
119
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
120
131
if(copy_name == NULL){
132
int e = errno;
121
133
free(new_plugin);
134
errno = e;
122
135
return NULL;
123
136
}
124
137
}
128
141
.disabled = false,
129
142
.next = plugin_list };
130
143
131
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
132
147
if(new_plugin->argv == NULL){
148
int e = errno;
133
149
free(copy_name);
134
150
free(new_plugin);
151
errno = e;
135
152
return NULL;
136
153
}
137
154
new_plugin->argv[0] = copy_name;
138
155
new_plugin->argv[1] = NULL;
139
156
140
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
141
160
if(new_plugin->environ == NULL){
161
int e = errno;
142
162
free(copy_name);
143
163
free(new_plugin->argv);
144
164
free(new_plugin);
165
errno = e;
145
166
return NULL;
146
167
}
147
168
new_plugin->environ[0] = NULL;
152
173
}
153
174
154
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
155
177
static bool add_to_char_array(const char *new, char ***array,
156
178
int *len){
157
179
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
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);
160
185
/* Malloc check */
161
if(*array == NULL){
186
if(new_array == NULL){
162
187
return false;
163
188
}
189
*array = new_array;
164
190
/* Make a copy of the new string */
165
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
166
195
if(copy == NULL){
167
196
return false;
168
197
}
175
204
}
176
205
177
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
178
208
static bool add_argument(plugin *p, const char *arg){
179
209
if(p == NULL){
180
210
return false;
183
213
}
184
214
185
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
186
217
static bool add_environment(plugin *p, const char *def, bool replace){
187
218
if(p == NULL){
188
219
return false;
190
221
/* namelen = length of name of environment variable */
191
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
223
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
195
226
/* It already exists */
196
227
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
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){
199
233
return false;
200
234
}
201
*e = new;
202
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
203
237
}
204
238
return true;
205
239
}
207
241
return add_to_char_array(def, &(p->environ), &(p->envc));
208
242
}
209
243
244
#ifndef O_CLOEXEC
210
245
/*
211
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
247
* Descriptor Flags".
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
249
*/
250
__attribute__((warn_unused_result))
215
251
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
253
/* If reading the flags failed, return error indication now. */
218
254
if(ret < 0){
219
255
return ret;
220
256
}
221
257
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
223
260
}
261
#endif /* not O_CLOEXEC */
224
262
225
263
226
264
/* Mark processes as completed when they exit, and save their exit
240
278
/* No child processes */
241
279
break;
242
280
}
243
perror("waitpid");
281
error(0, errno, "waitpid");
244
282
}
245
283
246
284
/* A child exited, find it in process_list */
258
296
}
259
297
260
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
261
300
static bool print_out_password(const char *buffer, size_t length){
262
301
ssize_t ret;
263
302
for(size_t written = 0; written < length; written += (size_t)ret){
271
310
}
272
311
273
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
274
314
static void free_plugin(plugin *plugin_node){
275
315
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
277
317
free(*arg);
278
318
}
319
free(plugin_node->name);
279
320
free(plugin_node->argv);
280
321
for(char **env = plugin_node->environ; *env != NULL; env++){
281
322
free(*env);
308
349
309
350
int main(int argc, char *argv[]){
310
351
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
311
353
char *argfile = NULL;
312
354
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
355
struct dirent **direntries = NULL;
316
356
struct stat st;
317
357
fd_set rfds_all;
318
358
int ret, maxfd = 0;
319
359
ssize_t sret;
320
intmax_t tmpmax;
321
360
uid_t uid = 65534;
322
361
gid_t gid = 65534;
323
362
bool debug = false;
327
366
.sa_flags = SA_NOCLDSTOP };
328
367
char **custom_argv = NULL;
329
368
int custom_argc = 0;
369
int dir_fd = -1;
330
370
331
371
/* Establish a signal handler */
332
372
sigemptyset(&sigchld_action.sa_mask);
333
373
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
374
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
337
377
goto fallback;
338
378
}
339
379
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
380
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
343
383
goto fallback;
344
384
}
345
385
377
417
.doc = "Group ID the plugins will run as", .group = 3 },
378
418
{ .name = "debug", .key = 132,
379
419
.doc = "Debug mode", .group = 4 },
420
{ .name = "plugin-helper-dir", .key = 133,
421
.arg = "DIRECTORY",
422
.doc = "Specify a different plugin helper directory",
423
.group = 2 },
424
/*
425
* These reproduce what we would get without ARGP_NO_HELP
426
*/
427
{ .name = "help", .key = '?',
428
.doc = "Give this help list", .group = -1 },
429
{ .name = "usage", .key = -3,
430
.doc = "Give a short usage message", .group = -1 },
431
{ .name = "version", .key = 'V',
432
.doc = "Print program version", .group = -1 },
380
433
{ .name = NULL }
381
434
};
382
435
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
386
439
switch(key){
440
char *tmp;
441
intmax_t tmp_id;
387
442
case 'g': /* --global-options */
388
if(arg != NULL){
443
{
389
444
char *plugin_option;
390
445
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
446
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
447
break;
397
448
}
398
449
}
450
errno = 0;
399
451
}
400
452
break;
401
453
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
407
456
}
408
457
break;
409
458
case 'o': /* --options-for */
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;
459
{
460
char *option_list = strchr(arg, ':');
461
if(option_list == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
break;
465
}
466
*option_list = '\0';
467
option_list++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
472
}
473
char *option;
474
while((option = strsep(&option_list, ",")) != NULL){
475
if(not add_argument(getplugin(arg), option)){
476
break;
420
477
}
421
478
}
479
errno = 0;
422
480
}
423
481
break;
424
482
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
483
{
429
484
char *envdef = strchr(arg, ':');
430
485
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
431
488
break;
432
489
}
433
490
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
491
envdef++;
492
if(arg[0] == '\0'){
493
argp_error(state, "Empty plugin name");
494
errno = EINVAL;
495
break;
496
}
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
436
499
}
437
500
}
438
501
break;
439
502
case 'd': /* --disable */
440
if(arg != NULL){
503
{
441
504
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
444
508
}
445
p->disabled = true;
446
509
}
447
510
break;
448
511
case 'e': /* --enable */
449
if(arg != NULL){
512
{
450
513
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
453
517
}
454
p->disabled = false;
455
518
}
456
519
break;
457
520
case 128: /* --plugin-dir */
458
521
free(plugindir);
459
522
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
523
if(plugindir != NULL){
524
errno = 0;
462
525
}
463
526
break;
464
527
case 129: /* --config-file */
465
528
/* This is already done by parse_opt_config_file() */
466
529
break;
467
530
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
531
tmp_id = strtoimax(arg, &tmp, 10);
470
532
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
533
or tmp_id != (uid_t)tmp_id){
534
argp_error(state, "Bad user ID number: \"%s\", using %"
535
PRIdMAX, arg, (intmax_t)uid);
536
break;
476
537
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
477
540
break;
478
541
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
481
543
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
544
or tmp_id != (gid_t)tmp_id){
545
argp_error(state, "Bad group ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)gid);
547
break;
487
548
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
488
551
break;
489
552
case 132: /* --debug */
490
553
debug = true;
491
554
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
562
/*
563
* These reproduce what we would get without ARGP_NO_HELP
564
*/
565
case '?': /* --help */
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
case -3: /* --usage */
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
argp_state_help(state, state->out_stream,
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
case 'V': /* --version */
575
fprintf(state->out_stream, "%s\n", argp_program_version);
576
exit(EXIT_SUCCESS);
577
break;
492
578
/*
493
579
* When adding more options before this line, remember to also add a
494
580
* "case" to the "parse_opt_config_file" function below.
497
583
/* Cryptsetup always passes an argument, which is an empty
498
584
string if "none" was specified in /etc/crypttab. So if
499
585
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
586
if(arg[0] == '\0'){
587
break;
502
588
}
503
break;
504
case ARGP_KEY_END:
505
break;
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
506
594
default:
507
595
return ARGP_ERR_UNKNOWN;
508
596
}
509
return 0;
597
return errno; /* Set to 0 at start */
510
598
}
511
599
512
600
/* This option parser is the same as parse_opt() above, except it
514
602
error_t parse_opt_config_file(int key, char *arg,
515
603
__attribute__((unused))
516
604
struct argp_state *state){
605
errno = 0;
517
606
switch(key){
518
607
case 'g': /* --global-options */
519
608
case 'G': /* --global-env */
526
615
case 129: /* --config-file */
527
616
free(argfile);
528
617
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
618
if(argfile != NULL){
619
errno = 0;
531
620
}
532
621
break;
533
622
case 130: /* --userid */
534
623
case 131: /* --groupid */
535
624
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
case '?': /* --help */
627
case -3: /* --usage */
628
case 'V': /* --version */
536
629
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
630
break;
539
631
default:
540
632
return ARGP_ERR_UNKNOWN;
541
633
}
542
return 0;
634
return errno;
543
635
}
544
636
545
637
struct argp argp = { .options = options,
549
641
550
642
/* Parse using parse_opt_config_file() in order to get the custom
551
643
config file location, if any. */
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;
644
ret = argp_parse(&argp, argc, argv,
645
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
646
NULL, NULL);
647
switch(ret){
648
case 0:
649
break;
650
case ENOMEM:
651
default:
652
errno = ret;
653
error(0, errno, "argp_parse");
654
exitstatus = EX_OSERR;
655
goto fallback;
656
case EINVAL:
657
exitstatus = EX_USAGE;
556
658
goto fallback;
557
659
}
558
660
575
677
custom_argc = 1;
576
678
custom_argv = malloc(sizeof(char*) * 2);
577
679
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
680
error(0, errno, "malloc");
681
exitstatus = EX_OSERR;
580
682
goto fallback;
581
683
}
582
684
custom_argv[0] = argv[0];
598
700
}
599
701
new_arg = strdup(p);
600
702
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
603
705
free(org_line);
604
706
goto fallback;
605
707
}
606
708
607
709
custom_argc += 1;
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;
710
{
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
716
free(new_arg);
717
free(org_line);
718
goto fallback;
719
} else {
720
custom_argv = new_argv;
721
}
615
722
}
616
723
custom_argv[custom_argc-1] = new_arg;
617
724
custom_argv[custom_argc] = NULL;
618
725
}
619
726
}
727
do {
728
ret = fclose(conffp);
729
} while(ret == EOF and errno == EINTR);
730
if(ret == EOF){
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
733
goto fallback;
734
}
620
735
free(org_line);
621
736
} else {
622
737
/* Check for harmful errors and go to fallback. Other errors might
623
738
not affect opening plugins */
624
739
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
627
742
goto fallback;
628
743
}
629
744
}
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
745
/* If there were any arguments from the configuration file, pass
746
them to parser as command line arguments */
632
747
if(custom_argv != NULL){
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;
748
ret = argp_parse(&argp, custom_argc, custom_argv,
749
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
750
NULL, NULL);
751
switch(ret){
752
case 0:
753
break;
754
case ENOMEM:
755
default:
756
errno = ret;
757
error(0, errno, "argp_parse");
758
exitstatus = EX_OSERR;
759
goto fallback;
760
case EINVAL:
761
exitstatus = EX_CONFIG;
638
762
goto fallback;
639
763
}
640
764
}
641
765
642
766
/* Parse actual command line arguments, to let them override the
643
767
config file */
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;
768
ret = argp_parse(&argp, argc, argv,
769
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
770
NULL, NULL);
771
switch(ret){
772
case 0:
773
break;
774
case ENOMEM:
775
default:
776
errno = ret;
777
error(0, errno, "argp_parse");
778
exitstatus = EX_OSERR;
779
goto fallback;
780
case EINVAL:
781
exitstatus = EX_USAGE;
782
goto fallback;
783
}
784
785
{
786
char *pluginhelperenv;
787
bool bret = true;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
if(ret != -1){
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
792
}
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
797
}
798
if(ret != -1){
799
free(pluginhelperenv);
800
}
649
801
}
650
802
651
803
if(debug){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
653
805
fprintf(stderr, "Plugin: %s has %d arguments\n",
654
806
p->name ? p->name : "Global", p->argc - 1);
655
807
for(char **a = p->argv; *a != NULL; a++){
662
814
}
663
815
}
664
816
665
/* Strip permissions down to nobody */
666
setgid(gid);
817
if(getuid() == 0){
818
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
820
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
if(plugindir_fd == -1){
822
if(errno != ENOENT){
823
error(0, errno, "open(\"" PDIR "\")");
824
}
825
} else {
826
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
827
if(ret == -1){
828
error(0, errno, "fstat");
829
} else {
830
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
831
ret = fchown(plugindir_fd, uid, gid);
832
if(ret == -1){
833
error(0, errno, "fchown");
834
}
835
}
836
}
837
close(plugindir_fd);
838
}
839
}
840
841
/* Lower permissions */
842
ret = setgid(gid);
667
843
if(ret == -1){
668
perror("setgid");
844
error(0, errno, "setgid");
669
845
}
670
846
ret = setuid(uid);
671
847
if(ret == -1){
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 */
848
error(0, errno, "setuid");
849
}
850
851
/* Open plugin directory with close_on_exec flag */
688
852
{
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;
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
854
#ifdef O_CLOEXEC
855
O_CLOEXEC
856
#else /* not O_CLOEXEC */
857
0
858
#endif /* not O_CLOEXEC */
859
);
860
if(dir_fd == -1){
861
error(0, errno, "Could not open plugin dir");
862
exitstatus = EX_UNAVAILABLE;
863
goto fallback;
864
}
865
866
#ifndef O_CLOEXEC
867
/* Set the FD_CLOEXEC flag on the directory */
868
ret = set_cloexec_flag(dir_fd);
869
if(ret < 0){
870
error(0, errno, "set_cloexec_flag");
871
exitstatus = EX_OSERR;
872
goto fallback;
873
}
874
#endif /* O_CLOEXEC */
875
}
876
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
881
#ifdef __GNUC__
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
884
#endif
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
887
#ifdef __GNUC__
888
#pragma GCC diagnostic pop
889
#endif
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
891
!= FNM_NOMATCH){
892
if(debug){
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
895
}
896
return 0;
696
897
}
697
898
}
899
return 1;
900
}
901
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
903
alphasort);
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
906
direntries = NULL;
907
exitstatus = EX_OSERR;
908
goto fallback;
698
909
}
699
910
700
911
FD_ZERO(&rfds_all);
701
912
702
913
/* Read and execute any executable in the plugin directory*/
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");
914
for(int i = 0; i < numplugins; i++){
915
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
917
if(plugin_fd == -1){
918
error(0, errno, "Could not open plugin");
919
free(direntries[i]);
770
920
continue;
771
921
}
772
773
ret = stat(filename, &st);
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
774
923
if(ret == -1){
775
perror("stat");
776
free(filename);
924
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
777
927
continue;
778
928
}
779
929
780
930
/* Ignore non-executable files */
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
931
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
782
934
if(debug){
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
785
939
}
786
free(filename);
940
close(plugin_fd);
941
free(direntries[i]);
787
942
continue;
788
943
}
789
944
790
plugin *p = getplugin(dirst->d_name);
945
plugin *p = getplugin(direntries[i]->d_name);
791
946
if(p == NULL){
792
perror("getplugin");
793
free(filename);
947
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
794
950
continue;
795
951
}
796
952
if(p->disabled){
797
953
if(debug){
798
954
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
799
dirst->d_name);
955
direntries[i]->d_name);
800
956
}
801
free(filename);
957
close(plugin_fd);
958
free(direntries[i]);
802
959
continue;
803
960
}
804
961
{
807
964
if(g != NULL){
808
965
for(char **a = g->argv + 1; *a != NULL; a++){
809
966
if(not add_argument(p, *a)){
810
perror("add_argument");
967
error(0, errno, "add_argument");
811
968
}
812
969
}
813
970
/* Add global environment variables */
814
971
for(char **e = g->environ; *e != NULL; e++){
815
972
if(not add_environment(p, *e, false)){
816
perror("add_environment");
973
error(0, errno, "add_environment");
817
974
}
818
975
}
819
976
}
820
977
}
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. */
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
824
980
if(p->environ[0] != NULL){
825
981
for(char **e = environ; *e != NULL; e++){
826
982
if(not add_environment(p, *e, false)){
827
perror("add_environment");
983
error(0, errno, "add_environment");
828
984
}
829
985
}
830
986
}
831
987
832
988
int pipefd[2];
833
ret = pipe(pipefd);
989
#ifndef O_CLOEXEC
990
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
834
994
if(ret == -1){
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
995
error(0, errno, "pipe");
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1002
FD_SETSIZE);
1003
close(pipefd[0]);
1004
close(pipefd[1]);
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
1007
goto fallback;
1008
}
1009
#ifndef O_CLOEXEC
839
1010
/* Ask OS to automatic close the pipe on exec */
840
1011
ret = set_cloexec_flag(pipefd[0]);
841
1012
if(ret < 0){
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
844
1018
goto fallback;
845
1019
}
846
1020
ret = set_cloexec_flag(pipefd[1]);
847
1021
if(ret < 0){
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1022
error(0, errno, "set_cloexec_flag");
1023
close(pipefd[0]);
1024
close(pipefd[1]);
1025
exitstatus = EX_OSERR;
1026
free(direntries[i]);
850
1027
goto fallback;
851
1028
}
1029
#endif /* not O_CLOEXEC */
852
1030
/* Block SIGCHLD until process is safely in process list */
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1031
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
&sigchld_action.sa_mask,
1033
NULL));
854
1034
if(ret < 0){
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
857
1038
goto fallback;
858
1039
}
859
1040
/* Starting a new process to be watched */
860
pid_t pid = fork();
1041
pid_t pid;
1042
do {
1043
pid = fork();
1044
} while(pid == -1 and errno == EINTR);
861
1045
if(pid == -1){
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1046
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
864
1053
goto fallback;
865
1054
}
866
1055
if(pid == 0){
867
1056
/* this is the child process */
868
1057
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
869
1058
if(ret < 0){
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1059
error(0, errno, "sigaction");
1060
_exit(EX_OSERR);
872
1061
}
873
1062
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
1063
if(ret < 0){
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1064
error(0, errno, "sigprocmask");
1065
_exit(EX_OSERR);
877
1066
}
878
1067
879
1068
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
880
1069
if(ret == -1){
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1070
error(0, errno, "dup2");
1071
_exit(EX_OSERR);
883
1072
}
884
1073
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
}
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
1079
_exit(EX_OSERR);
900
1080
}
901
1081
/* no return */
902
1082
}
903
1083
/* Parent process */
904
1084
close(pipefd[1]); /* Close unused write end of pipe */
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
907
1087
if(new_plugin == NULL){
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1088
error(0, errno, "getplugin");
1089
ret = (int)(TEMP_FAILURE_RETRY
1090
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1091
NULL)));
910
1092
if(ret < 0){
911
perror("sigprocmask");
1093
error(0, errno, "sigprocmask");
912
1094
}
913
exitstatus = EXIT_FAILURE;
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
914
1097
goto fallback;
915
1098
}
1099
free(direntries[i]);
916
1100
917
1101
new_plugin->pid = pid;
918
1102
new_plugin->fd = pipefd[0];
919
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
920
1109
/* Unblock SIGCHLD so signal handler can be run if this process
921
1110
has already completed */
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
&sigchld_action.sa_mask,
1113
NULL));
923
1114
if(ret < 0){
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
926
1117
goto fallback;
927
1118
}
928
1119
933
1124
}
934
1125
}
935
1126
936
closedir(dir);
937
dir = NULL;
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
938
1131
free_plugin(getplugin(NULL));
939
1132
940
1133
for(plugin *p = plugin_list; p != NULL; p = p->next){
952
1145
while(plugin_list){
953
1146
fd_set rfds = rfds_all;
954
1147
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1148
if(select_ret == -1 and errno != EINTR){
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
958
1151
goto fallback;
959
1152
}
960
1153
/* OK, now either a process completed, or something can be read
979
1172
(intmax_t) (proc->pid),
980
1173
WTERMSIG(proc->status),
981
1174
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));
985
1175
}
986
1176
}
987
1177
989
1179
FD_CLR(proc->fd, &rfds_all);
990
1180
991
1181
/* Block signal while modifying process_list */
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1182
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1183
(SIG_BLOCK,
1184
&sigchld_action.sa_mask,
1185
NULL));
993
1186
if(ret < 0){
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
996
1189
goto fallback;
997
1190
}
998
1191
1001
1194
proc = next_plugin;
1002
1195
1003
1196
/* We are done modifying process list, so unblock signal */
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1197
ret = (int)(TEMP_FAILURE_RETRY
1198
(sigprocmask(SIG_UNBLOCK,
1199
&sigchld_action.sa_mask, NULL)));
1006
1200
if(ret < 0){
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1201
error(0, errno, "sigprocmask");
1202
exitstatus = EX_OSERR;
1009
1203
goto fallback;
1010
1204
}
1011
1205
1021
1215
bool bret = print_out_password(proc->buffer,
1022
1216
proc->buffer_length);
1023
1217
if(not bret){
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1218
error(0, errno, "print_out_password");
1219
exitstatus = EX_IOERR;
1026
1220
}
1027
1221
goto fallback;
1028
1222
}
1035
1229
}
1036
1230
/* Before reading, make the process' data buffer large enough */
1037
1231
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1233
+ (size_t) BUFFER_SIZE);
1234
if(new_buffer == NULL){
1235
error(0, errno, "malloc");
1236
exitstatus = EX_OSERR;
1043
1237
goto fallback;
1044
1238
}
1239
proc->buffer = new_buffer;
1045
1240
proc->buffer_size += BUFFER_SIZE;
1046
1241
}
1047
1242
/* Read from the process */
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1243
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1244
proc->buffer
1245
+ proc->buffer_length,
1246
BUFFER_SIZE));
1050
1247
if(sret < 0){
1051
1248
/* Read error from this process; ignore the error */
1052
1249
proc = proc->next;
1064
1261
1065
1262
fallback:
1066
1263
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1264
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1265
and exitstatus != EX_OK)){
1068
1266
/* Fallback if all plugins failed, none are found or an error
1069
1267
occured */
1070
1268
bool bret;
1078
1276
}
1079
1277
bret = print_out_password(passwordbuffer, len);
1080
1278
if(not bret){
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1279
error(0, errno, "print_out_password");
1280
exitstatus = EX_IOERR;
1083
1281
}
1084
1282
}
1085
1283
1086
1284
/* Restore old signal handler */
1087
1285
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1088
1286
if(ret == -1){
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1287
error(0, errno, "sigaction");
1288
exitstatus = EX_OSERR;
1091
1289
}
1092
1290
1093
1291
if(custom_argv != NULL){
1097
1295
free(custom_argv);
1098
1296
}
1099
1297
1100
if(dir != NULL){
1101
closedir(dir);
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1102
1302
}
1103
1303
1104
1304
/* Kill the processes */
1108
1308
ret = kill(p->pid, SIGTERM);
1109
1309
if(ret == -1 and errno != ESRCH){
1110
1310
/* Set-uid proccesses might not get closed */
1111
perror("kill");
1311
error(0, errno, "kill");
1112
1312
}
1113
1313
}
1114
1314
}
1115
1315
1116
1316
/* Wait for any remaining child processes to terminate */
1117
do{
1317
do {
1118
1318
ret = wait(NULL);
1119
1319
} while(ret >= 0);
1120
1320
if(errno != ECHILD){
1121
perror("wait");
1321
error(0, errno, "wait");
1122
1322
}
1123
1323
1124
1324
free_plugin_list();
1125
1325
1126
1326
free(plugindir);
1327
free(pluginhelperdir);
1127
1328
free(argfile);
1128
1329
1129
1330
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0