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- Committer: Teddy Hogeborn
- Date: 2019-08-05 21:40:46 UTC
- mfrom: (237.4.120 release)
- Revision ID: teddy@recompile.se-20190805214046-qaj0w91ltbp92z2q
Merge from release branch
- 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 © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
111
117
}
112
118
/* Create a new plugin */
113
119
plugin *new_plugin = NULL;
114
do{
120
do {
115
121
new_plugin = malloc(sizeof(plugin));
116
}while(new_plugin == NULL and errno == EINTR);
122
} while(new_plugin == NULL and errno == EINTR);
117
123
if(new_plugin == NULL){
118
124
return NULL;
119
125
}
120
126
char *copy_name = NULL;
121
127
if(name != NULL){
122
do{
128
do {
123
129
copy_name = strdup(name);
124
}while(copy_name == NULL and errno == EINTR);
130
} while(copy_name == NULL and errno == EINTR);
125
131
if(copy_name == NULL){
132
int e = errno;
126
133
free(new_plugin);
134
errno = e;
127
135
return NULL;
128
136
}
129
137
}
133
141
.disabled = false,
134
142
.next = plugin_list };
135
143
136
do{
144
do {
137
145
new_plugin->argv = malloc(sizeof(char *) * 2);
138
}while(new_plugin->argv == NULL and errno == EINTR);
146
} while(new_plugin->argv == NULL and errno == EINTR);
139
147
if(new_plugin->argv == NULL){
148
int e = errno;
140
149
free(copy_name);
141
150
free(new_plugin);
151
errno = e;
142
152
return NULL;
143
153
}
144
154
new_plugin->argv[0] = copy_name;
145
155
new_plugin->argv[1] = NULL;
146
156
147
do{
157
do {
148
158
new_plugin->environ = malloc(sizeof(char *));
149
}while(new_plugin->environ == NULL and errno == EINTR);
159
} while(new_plugin->environ == NULL and errno == EINTR);
150
160
if(new_plugin->environ == NULL){
161
int e = errno;
151
162
free(copy_name);
152
163
free(new_plugin->argv);
153
164
free(new_plugin);
165
errno = e;
154
166
return NULL;
155
167
}
156
168
new_plugin->environ[0] = NULL;
161
173
}
162
174
163
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
164
177
static bool add_to_char_array(const char *new, char ***array,
165
178
int *len){
166
179
/* Resize the pointed-to array to hold one more pointer */
167
do{
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
}while(*array == NULL and errno == EINTR);
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
171
185
/* Malloc check */
172
if(*array == NULL){
186
if(new_array == NULL){
173
187
return false;
174
188
}
189
*array = new_array;
175
190
/* Make a copy of the new string */
176
191
char *copy;
177
do{
192
do {
178
193
copy = strdup(new);
179
}while(copy == NULL and errno == EINTR);
194
} while(copy == NULL and errno == EINTR);
180
195
if(copy == NULL){
181
196
return false;
182
197
}
189
204
}
190
205
191
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
192
208
static bool add_argument(plugin *p, const char *arg){
193
209
if(p == NULL){
194
210
return false;
197
213
}
198
214
199
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
200
217
static bool add_environment(plugin *p, const char *def, bool replace){
201
218
if(p == NULL){
202
219
return false;
204
221
/* namelen = length of name of environment variable */
205
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
223
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
209
226
/* It already exists */
210
227
if(replace){
211
char *new;
212
do{
213
new = realloc(*e, strlen(def) + 1);
214
}while(new == NULL and errno == EINTR);
215
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
216
233
return false;
217
234
}
218
*e = new;
219
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
220
237
}
221
238
return true;
222
239
}
224
241
return add_to_char_array(def, &(p->environ), &(p->envc));
225
242
}
226
243
244
#ifndef O_CLOEXEC
227
245
/*
228
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
247
* Descriptor Flags".
230
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
249
*/
250
__attribute__((warn_unused_result))
232
251
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
253
/* If reading the flags failed, return error indication now. */
235
254
if(ret < 0){
236
255
return ret;
237
256
}
238
257
/* Store modified flag word in the descriptor. */
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
240
260
}
261
#endif /* not O_CLOEXEC */
241
262
242
263
243
264
/* Mark processes as completed when they exit, and save their exit
257
278
/* No child processes */
258
279
break;
259
280
}
260
perror("waitpid");
281
error(0, errno, "waitpid");
261
282
}
262
283
263
284
/* A child exited, find it in process_list */
275
296
}
276
297
277
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
278
300
static bool print_out_password(const char *buffer, size_t length){
279
301
ssize_t ret;
280
302
for(size_t written = 0; written < length; written += (size_t)ret){
288
310
}
289
311
290
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
291
314
static void free_plugin(plugin *plugin_node){
292
315
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
317
free(*arg);
295
318
}
319
free(plugin_node->name);
296
320
free(plugin_node->argv);
297
321
for(char **env = plugin_node->environ; *env != NULL; env++){
298
322
free(*env);
325
349
326
350
int main(int argc, char *argv[]){
327
351
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
328
353
char *argfile = NULL;
329
354
FILE *conffp;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
355
struct dirent **direntries = NULL;
333
356
struct stat st;
334
357
fd_set rfds_all;
335
358
int ret, maxfd = 0;
343
366
.sa_flags = SA_NOCLDSTOP };
344
367
char **custom_argv = NULL;
345
368
int custom_argc = 0;
369
int dir_fd = -1;
346
370
347
371
/* Establish a signal handler */
348
372
sigemptyset(&sigchld_action.sa_mask);
349
373
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
350
374
if(ret == -1){
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
353
377
goto fallback;
354
378
}
355
379
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
356
380
if(ret == -1){
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
359
383
goto fallback;
360
384
}
361
385
393
417
.doc = "Group ID the plugins will run as", .group = 3 },
394
418
{ .name = "debug", .key = 132,
395
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 },
396
433
{ .name = NULL }
397
434
};
398
435
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
401
439
switch(key){
402
440
char *tmp;
403
intmax_t tmpmax;
441
intmax_t tmp_id;
404
442
case 'g': /* --global-options */
405
if(arg != NULL){
443
{
406
444
char *plugin_option;
407
445
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
446
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
447
break;
414
448
}
415
449
}
450
errno = 0;
416
451
}
417
452
break;
418
453
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
424
456
}
425
457
break;
426
458
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;
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;
437
477
}
438
478
}
479
errno = 0;
439
480
}
440
481
break;
441
482
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
483
{
446
484
char *envdef = strchr(arg, ':');
447
485
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
448
488
break;
449
489
}
450
490
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
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;
453
499
}
454
500
}
455
501
break;
456
502
case 'd': /* --disable */
457
if(arg != NULL){
503
{
458
504
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
461
508
}
462
p->disabled = true;
463
509
}
464
510
break;
465
511
case 'e': /* --enable */
466
if(arg != NULL){
512
{
467
513
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
470
517
}
471
p->disabled = false;
472
518
}
473
519
break;
474
520
case 128: /* --plugin-dir */
475
521
free(plugindir);
476
522
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
523
if(plugindir != NULL){
524
errno = 0;
479
525
}
480
526
break;
481
527
case 129: /* --config-file */
482
528
/* This is already done by parse_opt_config_file() */
483
529
break;
484
530
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
531
tmp_id = strtoimax(arg, &tmp, 10);
487
532
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;
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;
493
537
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
494
540
break;
495
541
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
498
543
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;
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;
504
548
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
505
551
break;
506
552
case 132: /* --debug */
507
553
debug = true;
508
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;
509
578
/*
510
579
* When adding more options before this line, remember to also add a
511
580
* "case" to the "parse_opt_config_file" function below.
514
583
/* Cryptsetup always passes an argument, which is an empty
515
584
string if "none" was specified in /etc/crypttab. So if
516
585
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
586
if(arg[0] == '\0'){
587
break;
519
588
}
520
break;
521
case ARGP_KEY_END:
522
break;
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
523
594
default:
524
595
return ARGP_ERR_UNKNOWN;
525
596
}
526
return 0;
597
return errno; /* Set to 0 at start */
527
598
}
528
599
529
600
/* This option parser is the same as parse_opt() above, except it
531
602
error_t parse_opt_config_file(int key, char *arg,
532
603
__attribute__((unused))
533
604
struct argp_state *state){
605
errno = 0;
534
606
switch(key){
535
607
case 'g': /* --global-options */
536
608
case 'G': /* --global-env */
543
615
case 129: /* --config-file */
544
616
free(argfile);
545
617
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
618
if(argfile != NULL){
619
errno = 0;
548
620
}
549
621
break;
550
622
case 130: /* --userid */
551
623
case 131: /* --groupid */
552
624
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
case '?': /* --help */
627
case -3: /* --usage */
628
case 'V': /* --version */
553
629
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
630
break;
556
631
default:
557
632
return ARGP_ERR_UNKNOWN;
558
633
}
559
return 0;
634
return errno;
560
635
}
561
636
562
637
struct argp argp = { .options = options,
566
641
567
642
/* Parse using parse_opt_config_file() in order to get the custom
568
643
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;
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;
573
658
goto fallback;
574
659
}
575
660
592
677
custom_argc = 1;
593
678
custom_argv = malloc(sizeof(char*) * 2);
594
679
if(custom_argv == NULL){
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
680
error(0, errno, "malloc");
681
exitstatus = EX_OSERR;
597
682
goto fallback;
598
683
}
599
684
custom_argv[0] = argv[0];
615
700
}
616
701
new_arg = strdup(p);
617
702
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
620
705
free(org_line);
621
706
goto fallback;
622
707
}
623
708
624
709
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;
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
}
632
722
}
633
723
custom_argv[custom_argc-1] = new_arg;
634
724
custom_argv[custom_argc] = NULL;
635
725
}
636
726
}
637
do{
727
do {
638
728
ret = fclose(conffp);
639
}while(ret == EOF and errno == EINTR);
729
} while(ret == EOF and errno == EINTR);
640
730
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
643
733
goto fallback;
644
734
}
645
735
free(org_line);
647
737
/* Check for harmful errors and go to fallback. Other errors might
648
738
not affect opening plugins */
649
739
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
652
742
goto fallback;
653
743
}
654
744
}
655
/* If there was any arguments from configuration file,
656
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 */
657
747
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;
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;
663
762
goto fallback;
664
763
}
665
764
}
666
765
667
766
/* Parse actual command line arguments, to let them override the
668
767
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;
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
}
674
801
}
675
802
676
803
if(debug){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
805
fprintf(stderr, "Plugin: %s has %d arguments\n",
679
806
p->name ? p->name : "Global", p->argc - 1);
680
807
for(char **a = p->argv; *a != NULL; a++){
687
814
}
688
815
}
689
816
690
/* Strip permissions down to nobody */
691
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);
692
843
if(ret == -1){
693
perror("setgid");
844
error(0, errno, "setgid");
694
845
}
695
846
ret = setuid(uid);
696
847
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 */
848
error(0, errno, "setuid");
849
}
850
851
/* Open plugin directory with close_on_exec flag */
713
852
{
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;
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;
721
897
}
722
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;
723
909
}
724
910
725
911
FD_ZERO(&rfds_all);
726
912
727
913
/* 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");
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]);
799
920
continue;
800
921
}
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
803
923
if(ret == -1){
804
perror("stat");
805
free(filename);
924
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
806
927
continue;
807
928
}
808
929
809
930
/* Ignore non-executable files */
810
931
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
812
934
if(debug){
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" 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);
815
939
}
816
free(filename);
940
close(plugin_fd);
941
free(direntries[i]);
817
942
continue;
818
943
}
819
944
820
plugin *p = getplugin(dirst->d_name);
945
plugin *p = getplugin(direntries[i]->d_name);
821
946
if(p == NULL){
822
perror("getplugin");
823
free(filename);
947
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
824
950
continue;
825
951
}
826
952
if(p->disabled){
827
953
if(debug){
828
954
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
829
dirst->d_name);
955
direntries[i]->d_name);
830
956
}
831
free(filename);
957
close(plugin_fd);
958
free(direntries[i]);
832
959
continue;
833
960
}
834
961
{
837
964
if(g != NULL){
838
965
for(char **a = g->argv + 1; *a != NULL; a++){
839
966
if(not add_argument(p, *a)){
840
perror("add_argument");
967
error(0, errno, "add_argument");
841
968
}
842
969
}
843
970
/* Add global environment variables */
844
971
for(char **e = g->environ; *e != NULL; e++){
845
972
if(not add_environment(p, *e, false)){
846
perror("add_environment");
973
error(0, errno, "add_environment");
847
974
}
848
975
}
849
976
}
850
977
}
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. */
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
854
980
if(p->environ[0] != NULL){
855
981
for(char **e = environ; *e != NULL; e++){
856
982
if(not add_environment(p, *e, false)){
857
perror("add_environment");
983
error(0, errno, "add_environment");
858
984
}
859
985
}
860
986
}
861
987
862
988
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(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 */
864
994
if(ret == -1){
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
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
869
1010
/* Ask OS to automatic close the pipe on exec */
870
1011
ret = set_cloexec_flag(pipefd[0]);
871
1012
if(ret < 0){
872
perror("set_cloexec_flag");
873
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]);
874
1018
goto fallback;
875
1019
}
876
1020
ret = set_cloexec_flag(pipefd[1]);
877
1021
if(ret < 0){
878
perror("set_cloexec_flag");
879
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]);
880
1027
goto fallback;
881
1028
}
1029
#endif /* not O_CLOEXEC */
882
1030
/* Block SIGCHLD until process is safely in process list */
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1031
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
&sigchld_action.sa_mask,
1033
NULL));
886
1034
if(ret < 0){
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
889
1038
goto fallback;
890
1039
}
891
1040
/* Starting a new process to be watched */
892
1041
pid_t pid;
893
do{
1042
do {
894
1043
pid = fork();
895
}while(pid == -1 and errno == EINTR);
1044
} while(pid == -1 and errno == EINTR);
896
1045
if(pid == -1){
897
perror("fork");
898
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]);
899
1053
goto fallback;
900
1054
}
901
1055
if(pid == 0){
902
1056
/* this is the child process */
903
1057
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
904
1058
if(ret < 0){
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1059
error(0, errno, "sigaction");
1060
_exit(EX_OSERR);
907
1061
}
908
1062
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
1063
if(ret < 0){
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1064
error(0, errno, "sigprocmask");
1065
_exit(EX_OSERR);
912
1066
}
913
1067
914
1068
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
1069
if(ret == -1){
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1070
error(0, errno, "dup2");
1071
_exit(EX_OSERR);
918
1072
}
919
1073
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
}
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);
935
1080
}
936
1081
/* no return */
937
1082
}
938
1083
/* 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);
1084
close(pipefd[1]); /* Close unused write end of pipe */
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
943
1087
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1088
error(0, errno, "getplugin");
1089
ret = (int)(TEMP_FAILURE_RETRY
1090
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1091
NULL)));
948
1092
if(ret < 0){
949
perror("sigprocmask");
1093
error(0, errno, "sigprocmask");
950
1094
}
951
exitstatus = EXIT_FAILURE;
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
952
1097
goto fallback;
953
1098
}
1099
free(direntries[i]);
954
1100
955
1101
new_plugin->pid = pid;
956
1102
new_plugin->fd = pipefd[0];
957
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
958
1109
/* Unblock SIGCHLD so signal handler can be run if this process
959
1110
has already completed */
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
&sigchld_action.sa_mask,
1113
NULL));
963
1114
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
966
1117
goto fallback;
967
1118
}
968
1119
973
1124
}
974
1125
}
975
1126
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
978
1131
free_plugin(getplugin(NULL));
979
1132
980
1133
for(plugin *p = plugin_list; p != NULL; p = p->next){
993
1146
fd_set rfds = rfds_all;
994
1147
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
995
1148
if(select_ret == -1 and errno != EINTR){
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
998
1151
goto fallback;
999
1152
}
1000
1153
/* OK, now either a process completed, or something can be read
1019
1172
(intmax_t) (proc->pid),
1020
1173
WTERMSIG(proc->status),
1021
1174
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
1175
}
1026
1176
}
1027
1177
1029
1179
FD_CLR(proc->fd, &rfds_all);
1030
1180
1031
1181
/* Block signal while modifying process_list */
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1182
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1183
(SIG_BLOCK,
1184
&sigchld_action.sa_mask,
1185
NULL));
1035
1186
if(ret < 0){
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1038
1189
goto fallback;
1039
1190
}
1040
1191
1043
1194
proc = next_plugin;
1044
1195
1045
1196
/* We are done modifying process list, so unblock signal */
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1197
ret = (int)(TEMP_FAILURE_RETRY
1198
(sigprocmask(SIG_UNBLOCK,
1199
&sigchld_action.sa_mask, NULL)));
1049
1200
if(ret < 0){
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1201
error(0, errno, "sigprocmask");
1202
exitstatus = EX_OSERR;
1052
1203
goto fallback;
1053
1204
}
1054
1205
1064
1215
bool bret = print_out_password(proc->buffer,
1065
1216
proc->buffer_length);
1066
1217
if(not bret){
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1218
error(0, errno, "print_out_password");
1219
exitstatus = EX_IOERR;
1069
1220
}
1070
1221
goto fallback;
1071
1222
}
1078
1229
}
1079
1230
/* Before reading, make the process' data buffer large enough */
1080
1231
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;
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;
1086
1237
goto fallback;
1087
1238
}
1239
proc->buffer = new_buffer;
1088
1240
proc->buffer_size += BUFFER_SIZE;
1089
1241
}
1090
1242
/* Read from the process */
1109
1261
1110
1262
fallback:
1111
1263
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1264
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1265
and exitstatus != EX_OK)){
1113
1266
/* Fallback if all plugins failed, none are found or an error
1114
1267
occured */
1115
1268
bool bret;
1123
1276
}
1124
1277
bret = print_out_password(passwordbuffer, len);
1125
1278
if(not bret){
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1279
error(0, errno, "print_out_password");
1280
exitstatus = EX_IOERR;
1128
1281
}
1129
1282
}
1130
1283
1131
1284
/* Restore old signal handler */
1132
1285
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
1286
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1287
error(0, errno, "sigaction");
1288
exitstatus = EX_OSERR;
1136
1289
}
1137
1290
1138
1291
if(custom_argv != NULL){
1142
1295
free(custom_argv);
1143
1296
}
1144
1297
1145
if(dir != NULL){
1146
closedir(dir);
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1147
1302
}
1148
1303
1149
1304
/* Kill the processes */
1153
1308
ret = kill(p->pid, SIGTERM);
1154
1309
if(ret == -1 and errno != ESRCH){
1155
1310
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1311
error(0, errno, "kill");
1157
1312
}
1158
1313
}
1159
1314
}
1160
1315
1161
1316
/* Wait for any remaining child processes to terminate */
1162
do{
1317
do {
1163
1318
ret = wait(NULL);
1164
1319
} while(ret >= 0);
1165
1320
if(errno != ECHILD){
1166
perror("wait");
1321
error(0, errno, "wait");
1167
1322
}
1168
1323
1169
1324
free_plugin_list();
1170
1325
1171
1326
free(plugindir);
1327
free(pluginhelperdir);
1172
1328
free(argfile);
1173
1329
1174
1330
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0