To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 237.2.110
- compare with another revision
- download diff
- download tarball
- view history from revision 237.2.110
- Committer: Teddy Hogeborn
- Date: 2009-05-24 23:28:04 UTC
- mto: (24.1.138 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 264.
- Revision ID: teddy@fukt.bsnet.se-20090524232804-4rl7az1p733d34wu
* debian/mandos.postinst (configure): Don't look for user and group
with the old name if upgrading
from a new enough version.
with the old name if upgrading
from a new enough version.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf() */
28
27
#include <stddef.h> /* size_t, NULL */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
31
30
#include <stdbool.h> /* bool, true, false */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
52
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
57
56
#include <errno.h> /* errno */
58
57
#include <argp.h> /* struct argp_option, struct
59
58
argp_state, struct argp,
67
66
*/
68
67
#include <errno.h> /* errno, EBADF */
69
68
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
69
76
70
#define BUFFER_SIZE 256
77
71
78
72
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
74
82
75
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
77
85
78
typedef struct plugin{
86
79
char *name; /* can be NULL or any plugin name */
106
99
107
100
/* Gets an existing plugin based on name,
108
101
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
102
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
112
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
105
if((p->name == name)
114
106
or (p->name and name and (strcmp(p->name, name) == 0))){
116
108
}
117
109
}
118
110
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
123
112
if(new_plugin == NULL){
124
113
return NULL;
125
114
}
126
115
char *copy_name = NULL;
127
116
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
131
118
if(copy_name == NULL){
132
int e = errno;
133
119
free(new_plugin);
134
errno = e;
135
120
return NULL;
136
121
}
137
122
}
141
126
.disabled = false,
142
127
.next = plugin_list };
143
128
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
147
130
if(new_plugin->argv == NULL){
148
int e = errno;
149
131
free(copy_name);
150
132
free(new_plugin);
151
errno = e;
152
133
return NULL;
153
134
}
154
135
new_plugin->argv[0] = copy_name;
155
136
new_plugin->argv[1] = NULL;
156
137
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
160
139
if(new_plugin->environ == NULL){
161
int e = errno;
162
140
free(copy_name);
163
141
free(new_plugin->argv);
164
142
free(new_plugin);
165
errno = e;
166
143
return NULL;
167
144
}
168
145
new_plugin->environ[0] = NULL;
173
150
}
174
151
175
152
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
153
static bool add_to_char_array(const char *new, char ***array,
178
154
int *len){
179
155
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
185
158
/* Malloc check */
186
if(new_array == NULL){
159
if(*array == NULL){
187
160
return false;
188
161
}
189
*array = new_array;
190
162
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
195
164
if(copy == NULL){
196
165
return false;
197
166
}
204
173
}
205
174
206
175
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
176
static bool add_argument(plugin *p, const char *arg){
209
177
if(p == NULL){
210
178
return false;
213
181
}
214
182
215
183
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
184
static bool add_environment(plugin *p, const char *def, bool replace){
218
185
if(p == NULL){
219
186
return false;
221
188
/* namelen = length of name of environment variable */
222
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
190
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
226
193
/* It already exists */
227
194
if(replace){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
233
197
return false;
234
198
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
199
*e = new;
200
strcpy(*e, def);
237
201
}
238
202
return true;
239
203
}
241
205
return add_to_char_array(def, &(p->environ), &(p->envc));
242
206
}
243
207
244
#ifndef O_CLOEXEC
245
208
/*
246
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
210
* Descriptor Flags".
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
249
212
*/
250
__attribute__((warn_unused_result))
251
213
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
253
215
/* If reading the flags failed, return error indication now. */
254
216
if(ret < 0){
255
217
return ret;
256
218
}
257
219
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
260
221
}
261
#endif /* not O_CLOEXEC */
262
222
263
223
264
224
/* Mark processes as completed when they exit, and save their exit
278
238
/* No child processes */
279
239
break;
280
240
}
281
error(0, errno, "waitpid");
241
perror("waitpid");
282
242
}
283
243
284
244
/* A child exited, find it in process_list */
296
256
}
297
257
298
258
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
259
static bool print_out_password(const char *buffer, size_t length){
301
260
ssize_t ret;
302
261
for(size_t written = 0; written < length; written += (size_t)ret){
310
269
}
311
270
312
271
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
272
static void free_plugin(plugin *plugin_node){
315
273
316
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
348
306
349
307
int main(int argc, char *argv[]){
350
308
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
352
309
char *argfile = NULL;
353
310
FILE *conffp;
354
struct dirent **direntries = NULL;
311
size_t d_name_len;
312
DIR *dir = NULL;
313
struct dirent *dirst;
355
314
struct stat st;
356
315
fd_set rfds_all;
357
316
int ret, maxfd = 0;
358
317
ssize_t sret;
318
intmax_t tmpmax;
359
319
uid_t uid = 65534;
360
320
gid_t gid = 65534;
361
321
bool debug = false;
365
325
.sa_flags = SA_NOCLDSTOP };
366
326
char **custom_argv = NULL;
367
327
int custom_argc = 0;
368
int dir_fd = -1;
369
328
370
329
/* Establish a signal handler */
371
330
sigemptyset(&sigchld_action.sa_mask);
372
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
373
332
if(ret == -1){
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
376
335
goto fallback;
377
336
}
378
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
379
338
if(ret == -1){
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
382
341
goto fallback;
383
342
}
384
343
416
375
.doc = "Group ID the plugins will run as", .group = 3 },
417
376
{ .name = "debug", .key = 132,
418
377
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
432
378
{ .name = NULL }
433
379
};
434
380
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
383
char *tmp;
438
384
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
441
385
case 'g': /* --global-options */
442
{
386
if(arg != NULL){
443
387
char *plugin_option;
444
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
445
392
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
447
395
}
448
396
}
449
errno = 0;
450
397
}
451
398
break;
452
399
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
455
405
}
456
406
break;
457
407
case 'o': /* --options-for */
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
408
if(arg != NULL){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
411
break;
412
}
413
char *plugin_option;
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
476
418
}
477
419
}
478
errno = 0;
479
420
}
480
421
break;
481
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
482
426
{
483
427
char *envdef = strchr(arg, ':');
484
428
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
487
429
break;
488
430
}
489
431
*envdef = '\0';
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
498
434
}
499
435
}
500
436
break;
501
437
case 'd': /* --disable */
502
{
438
if(arg != NULL){
503
439
plugin *p = getplugin(arg);
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
507
442
}
443
p->disabled = true;
508
444
}
509
445
break;
510
446
case 'e': /* --enable */
511
{
447
if(arg != NULL){
512
448
plugin *p = getplugin(arg);
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
516
451
}
452
p->disabled = false;
517
453
}
518
454
break;
519
455
case 128: /* --plugin-dir */
520
456
free(plugindir);
521
457
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
524
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
525
461
break;
526
462
case 129: /* --config-file */
527
463
/* This is already done by parse_opt_config_file() */
528
464
break;
529
465
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
466
errno = 0;
467
tmpmax = strtoimax(arg, &tmp, 10);
531
468
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
469
or tmpmax != (uid_t)tmpmax){
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
472
} else {
473
uid = (uid_t)tmpmax;
536
474
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
539
475
break;
540
476
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
477
errno = 0;
478
tmpmax = strtoimax(arg, &tmp, 10);
542
479
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
480
or tmpmax != (gid_t)tmpmax){
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
547
485
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
550
486
break;
551
487
case 132: /* --debug */
552
488
debug = true;
553
489
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;
575
490
/*
576
491
* When adding more options before this line, remember to also add a
577
492
* "case" to the "parse_opt_config_file" function below.
580
495
/* Cryptsetup always passes an argument, which is an empty
581
496
string if "none" was specified in /etc/crypttab. So if
582
497
argument was empty, we ignore it silently. */
583
if(arg[0] == '\0'){
584
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
585
500
}
586
/* FALLTHROUGH */
501
break;
502
case ARGP_KEY_END:
503
break;
587
504
default:
588
505
return ARGP_ERR_UNKNOWN;
589
506
}
590
return errno; /* Set to 0 at start */
507
return 0;
591
508
}
592
509
593
510
/* This option parser is the same as parse_opt() above, except it
595
512
error_t parse_opt_config_file(int key, char *arg,
596
513
__attribute__((unused))
597
514
struct argp_state *state){
598
errno = 0;
599
515
switch(key){
600
516
case 'g': /* --global-options */
601
517
case 'G': /* --global-env */
608
524
case 129: /* --config-file */
609
525
free(argfile);
610
526
argfile = strdup(arg);
611
if(argfile != NULL){
612
errno = 0;
527
if(argfile == NULL){
528
perror("strdup");
613
529
}
614
break;
530
break;
615
531
case 130: /* --userid */
616
532
case 131: /* --groupid */
617
533
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
622
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
623
536
break;
624
537
default:
625
538
return ARGP_ERR_UNKNOWN;
626
539
}
627
return errno;
540
return 0;
628
541
}
629
542
630
543
struct argp argp = { .options = options,
634
547
635
548
/* Parse using parse_opt_config_file() in order to get the custom
636
549
config file location, if any. */
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;
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
651
554
goto fallback;
652
555
}
653
556
659
562
conffp = fopen(AFILE, "r");
660
563
} else {
661
564
conffp = fopen(argfile, "r");
662
}
565
}
663
566
if(conffp != NULL){
664
567
char *org_line = NULL;
665
568
char *p, *arg, *new_arg, *line;
670
573
custom_argc = 1;
671
574
custom_argv = malloc(sizeof(char*) * 2);
672
575
if(custom_argv == NULL){
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
675
578
goto fallback;
676
579
}
677
580
custom_argv[0] = argv[0];
693
596
}
694
597
new_arg = strdup(p);
695
598
if(new_arg == NULL){
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
698
601
free(org_line);
699
602
goto fallback;
700
603
}
701
604
702
605
custom_argc += 1;
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
}
606
custom_argv = realloc(custom_argv, sizeof(char *)
607
* ((unsigned int) custom_argc + 1));
608
if(custom_argv == NULL){
609
perror("realloc");
610
exitstatus = EXIT_FAILURE;
611
free(org_line);
612
goto fallback;
715
613
}
716
614
custom_argv[custom_argc-1] = new_arg;
717
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
718
616
}
719
617
}
720
do {
721
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
723
if(ret == EOF){
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
726
goto fallback;
727
}
728
618
free(org_line);
729
619
} else {
730
620
/* Check for harmful errors and go to fallback. Other errors might
731
621
not affect opening plugins */
732
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
735
625
goto fallback;
736
626
}
737
627
}
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
740
630
if(custom_argv != NULL){
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;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
755
636
goto fallback;
756
637
}
757
638
}
758
639
759
640
/* Parse actual command line arguments, to let them override the
760
641
config file */
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
}
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
646
goto fallback;
794
647
}
795
648
796
649
if(debug){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
650
for(plugin *p = plugin_list; p != NULL; p=p->next){
798
651
fprintf(stderr, "Plugin: %s has %d arguments\n",
799
652
p->name ? p->name : "Global", p->argc - 1);
800
653
for(char **a = p->argv; *a != NULL; a++){
807
660
}
808
661
}
809
662
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);
663
/* Strip permissions down to nobody */
664
setgid(gid);
836
665
if(ret == -1){
837
error(0, errno, "setgid");
666
perror("setgid");
838
667
}
839
668
ret = setuid(uid);
840
669
if(ret == -1){
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
670
perror("setuid");
671
}
672
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
845
686
{
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;
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
890
694
}
891
695
}
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;
902
696
}
903
697
904
698
FD_ZERO(&rfds_all);
905
699
906
700
/* Read and execute any executable in the plugin directory*/
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]);
701
while(true){
702
dirst = readdir(dir);
703
704
/* All directory entries have been processed */
705
if(dirst == NULL){
706
if(errno == EBADF){
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
break;
712
}
713
714
d_name_len = strlen(dirst->d_name);
715
716
/* Ignore dotfiles, backup files and other junk */
717
{
718
bool bad_name = false;
719
720
const char const *bad_prefixes[] = { ".", "#", NULL };
721
722
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
723
".dpkg-old",
724
".dpkg-bak",
725
".dpkg-divert", NULL };
726
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
727
size_t pre_len = strlen(*pre);
728
if((d_name_len >= pre_len)
729
and strncmp((dirst->d_name), *pre, pre_len) == 0){
730
if(debug){
731
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
732
" with bad prefix %s\n", dirst->d_name, *pre);
733
}
734
bad_name = true;
735
break;
736
}
737
}
738
if(bad_name){
739
continue;
740
}
741
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
742
size_t suf_len = strlen(*suf);
743
if((d_name_len >= suf_len)
744
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
745
== 0)){
746
if(debug){
747
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
748
" with bad suffix %s\n", dirst->d_name, *suf);
749
}
750
bad_name = true;
751
break;
752
}
753
}
754
755
if(bad_name){
756
continue;
757
}
758
}
759
760
char *filename;
761
if(plugindir == NULL){
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
763
} else {
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
765
}
766
if(ret < 0){
767
perror("asprintf");
913
768
continue;
914
769
}
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
770
771
ret = stat(filename, &st);
916
772
if(ret == -1){
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
773
perror("stat");
774
free(filename);
920
775
continue;
921
776
}
922
777
923
778
/* Ignore non-executable files */
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
926
X_OK, 0)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
780
if(debug){
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);
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
932
783
}
933
close(plugin_fd);
934
free(direntries[i]);
784
free(filename);
935
785
continue;
936
786
}
937
787
938
plugin *p = getplugin(direntries[i]->d_name);
788
plugin *p = getplugin(dirst->d_name);
939
789
if(p == NULL){
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
790
perror("getplugin");
791
free(filename);
943
792
continue;
944
793
}
945
794
if(p->disabled){
946
795
if(debug){
947
796
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
948
direntries[i]->d_name);
797
dirst->d_name);
949
798
}
950
close(plugin_fd);
951
free(direntries[i]);
799
free(filename);
952
800
continue;
953
801
}
954
802
{
957
805
if(g != NULL){
958
806
for(char **a = g->argv + 1; *a != NULL; a++){
959
807
if(not add_argument(p, *a)){
960
error(0, errno, "add_argument");
808
perror("add_argument");
961
809
}
962
810
}
963
811
/* Add global environment variables */
964
812
for(char **e = g->environ; *e != NULL; e++){
965
813
if(not add_environment(p, *e, false)){
966
error(0, errno, "add_environment");
814
perror("add_environment");
967
815
}
968
816
}
969
817
}
970
818
}
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
819
/* If this plugin has any environment variables, we will call
820
using execve and need to duplicate the environment from this
821
process, too. */
973
822
if(p->environ[0] != NULL){
974
823
for(char **e = environ; *e != NULL; e++){
975
824
if(not add_environment(p, *e, false)){
976
error(0, errno, "add_environment");
825
perror("add_environment");
977
826
}
978
827
}
979
828
}
980
829
981
830
int pipefd[2];
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 */
831
ret = pipe(pipefd);
987
832
if(ret == -1){
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
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
835
goto fallback;
836
}
1003
837
/* Ask OS to automatic close the pipe on exec */
1004
838
ret = set_cloexec_flag(pipefd[0]);
1005
839
if(ret < 0){
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1011
842
goto fallback;
1012
843
}
1013
844
ret = set_cloexec_flag(pipefd[1]);
1014
845
if(ret < 0){
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1020
848
goto fallback;
1021
849
}
1022
#endif /* not O_CLOEXEC */
1023
850
/* Block SIGCHLD until process is safely in process list */
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1025
&sigchld_action.sa_mask,
1026
NULL));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1027
852
if(ret < 0){
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1031
855
goto fallback;
1032
856
}
1033
857
/* Starting a new process to be watched */
1034
pid_t pid;
1035
do {
1036
pid = fork();
1037
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
1038
859
if(pid == -1){
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]);
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1046
862
goto fallback;
1047
863
}
1048
864
if(pid == 0){
1049
865
/* this is the child process */
1050
866
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
867
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1054
870
}
1055
871
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
872
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1059
875
}
1060
876
1061
877
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
878
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1065
881
}
1066
882
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);
883
if(dirfd(dir) < 0){
884
/* If dir has no file descriptor, we could not set FD_CLOEXEC
885
above and must now close it manually here. */
886
closedir(dir);
887
}
888
if(p->environ[0] == NULL){
889
if(execv(filename, p->argv) < 0){
890
perror("execv");
891
_exit(EXIT_FAILURE);
892
}
893
} else {
894
if(execve(filename, p->argv, p->environ) < 0){
895
perror("execve");
896
_exit(EXIT_FAILURE);
897
}
1073
898
}
1074
899
/* no return */
1075
900
}
1076
901
/* Parent process */
1077
902
close(pipefd[1]); /* Close unused write end of pipe */
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
903
free(filename);
904
plugin *new_plugin = getplugin(dirst->d_name);
1080
905
if(new_plugin == NULL){
1081
error(0, errno, "getplugin");
1082
ret = (int)(TEMP_FAILURE_RETRY
1083
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1084
NULL)));
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
908
if(ret < 0){
1086
error(0, errno, "sigprocmask");
909
perror("sigprocmask");
1087
910
}
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
911
exitstatus = EXIT_FAILURE;
1090
912
goto fallback;
1091
913
}
1092
free(direntries[i]);
1093
914
1094
915
new_plugin->pid = pid;
1095
916
new_plugin->fd = pipefd[0];
1096
1097
if(debug){
1098
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1099
new_plugin->name, (intmax_t) (new_plugin->pid));
1100
}
1101
917
1102
918
/* Unblock SIGCHLD so signal handler can be run if this process
1103
919
has already completed */
1104
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1105
&sigchld_action.sa_mask,
1106
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
921
if(ret < 0){
1108
error(0, errno, "sigprocmask");
1109
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1110
924
goto fallback;
1111
925
}
1112
926
1117
931
}
1118
932
}
1119
933
1120
free(direntries);
1121
direntries = NULL;
1122
close(dir_fd);
1123
dir_fd = -1;
934
closedir(dir);
935
dir = NULL;
1124
936
free_plugin(getplugin(NULL));
1125
937
1126
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
1138
950
while(plugin_list){
1139
951
fd_set rfds = rfds_all;
1140
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1141
if(select_ret == -1 and errno != EINTR){
1142
error(0, errno, "select");
1143
exitstatus = EX_OSERR;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1144
956
goto fallback;
1145
957
}
1146
958
/* OK, now either a process completed, or something can be read
1161
973
WEXITSTATUS(proc->status));
1162
974
} else if(WIFSIGNALED(proc->status)){
1163
975
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1164
" signal %d: %s\n", proc->name,
976
" signal %d\n", proc->name,
1165
977
(intmax_t) (proc->pid),
1166
WTERMSIG(proc->status),
1167
strsignal(WTERMSIG(proc->status)));
978
WTERMSIG(proc->status));
979
} else if(WCOREDUMP(proc->status)){
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
981
" core\n", proc->name, (intmax_t) (proc->pid));
1168
982
}
1169
983
}
1170
984
1172
986
FD_CLR(proc->fd, &rfds_all);
1173
987
1174
988
/* Block signal while modifying process_list */
1175
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1176
(SIG_BLOCK,
1177
&sigchld_action.sa_mask,
1178
NULL));
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1179
990
if(ret < 0){
1180
error(0, errno, "sigprocmask");
1181
exitstatus = EX_OSERR;
991
perror("sigprocmask");
992
exitstatus = EXIT_FAILURE;
1182
993
goto fallback;
1183
994
}
1184
995
1187
998
proc = next_plugin;
1188
999
1189
1000
/* We are done modifying process list, so unblock signal */
1190
ret = (int)(TEMP_FAILURE_RETRY
1191
(sigprocmask(SIG_UNBLOCK,
1192
&sigchld_action.sa_mask, NULL)));
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1193
1003
if(ret < 0){
1194
error(0, errno, "sigprocmask");
1195
exitstatus = EX_OSERR;
1004
perror("sigprocmask");
1005
exitstatus = EXIT_FAILURE;
1196
1006
goto fallback;
1197
1007
}
1198
1008
1208
1018
bool bret = print_out_password(proc->buffer,
1209
1019
proc->buffer_length);
1210
1020
if(not bret){
1211
error(0, errno, "print_out_password");
1212
exitstatus = EX_IOERR;
1021
perror("print_out_password");
1022
exitstatus = EXIT_FAILURE;
1213
1023
}
1214
1024
goto fallback;
1215
1025
}
1222
1032
}
1223
1033
/* Before reading, make the process' data buffer large enough */
1224
1034
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
1035
proc->buffer = realloc(proc->buffer, proc->buffer_size
1036
+ (size_t) BUFFER_SIZE);
1037
if(proc->buffer == NULL){
1038
perror("malloc");
1039
exitstatus = EXIT_FAILURE;
1230
1040
goto fallback;
1231
1041
}
1232
proc->buffer = new_buffer;
1233
1042
proc->buffer_size += BUFFER_SIZE;
1234
1043
}
1235
1044
/* Read from the process */
1236
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1237
proc->buffer
1238
+ proc->buffer_length,
1239
BUFFER_SIZE));
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1240
1047
if(sret < 0){
1241
1048
/* Read error from this process; ignore the error */
1242
1049
proc = proc->next;
1254
1061
1255
1062
fallback:
1256
1063
1257
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1258
and exitstatus != EX_OK)){
1064
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1259
1065
/* Fallback if all plugins failed, none are found or an error
1260
1066
occured */
1261
1067
bool bret;
1269
1075
}
1270
1076
bret = print_out_password(passwordbuffer, len);
1271
1077
if(not bret){
1272
error(0, errno, "print_out_password");
1273
exitstatus = EX_IOERR;
1078
perror("print_out_password");
1079
exitstatus = EXIT_FAILURE;
1274
1080
}
1275
1081
}
1276
1082
1277
1083
/* Restore old signal handler */
1278
1084
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1279
1085
if(ret == -1){
1280
error(0, errno, "sigaction");
1281
exitstatus = EX_OSERR;
1086
perror("sigaction");
1087
exitstatus = EXIT_FAILURE;
1282
1088
}
1283
1089
1284
1090
if(custom_argv != NULL){
1288
1094
free(custom_argv);
1289
1095
}
1290
1096
1291
free(direntries);
1292
1293
if(dir_fd != -1){
1294
close(dir_fd);
1097
if(dir != NULL){
1098
closedir(dir);
1295
1099
}
1296
1100
1297
1101
/* Kill the processes */
1301
1105
ret = kill(p->pid, SIGTERM);
1302
1106
if(ret == -1 and errno != ESRCH){
1303
1107
/* Set-uid proccesses might not get closed */
1304
error(0, errno, "kill");
1108
perror("kill");
1305
1109
}
1306
1110
}
1307
1111
}
1308
1112
1309
1113
/* Wait for any remaining child processes to terminate */
1310
do {
1114
do{
1311
1115
ret = wait(NULL);
1312
1116
} while(ret >= 0);
1313
1117
if(errno != ECHILD){
1314
error(0, errno, "wait");
1118
perror("wait");
1315
1119
}
1316
1120
1317
1121
free_plugin_list();
1318
1122
1319
1123
free(plugindir);
1320
free(pluginhelperdir);
1321
1124
free(argfile);
1322
1125
1323
1126
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0