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- Committer: teddy at recompile
- Date: 2020-02-09 03:38:33 UTC
- Revision ID: teddy@recompile.se-20200209033833-2la1pujrnv2m0so4
Use reallocarray() if available, or check for overflow
* dracut-module/password-agent.c (add_to_queue): Check for overflow.
(test_add_to_queue_overflow): New test.
* plugin-runner.c (add_to_char_array, main): Use reallocarray().
* plugins.d/plymouth.c (exec_and_wait): - '' -
* dracut-module/password-agent.c (add_to_queue): Check for overflow.
(test_add_to_queue_overflow): New test.
* plugin-runner.c (add_to_char_array, main): Use reallocarray().
* plugins.d/plymouth.c (exec_and_wait): - '' -
- 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(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
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
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
184
sizeof(char *));
185
#else
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
187
/* overflow */
188
new_array = NULL;
189
errno = ENOMEM;
190
} else {
191
new_array = realloc(*array, (size_t)((*len) + 2)
192
* sizeof(char *));
193
}
194
#endif
195
} while(new_array == NULL and errno == EINTR);
160
196
/* Malloc check */
161
if(*array == NULL){
197
if(new_array == NULL){
162
198
return false;
163
199
}
200
*array = new_array;
164
201
/* Make a copy of the new string */
165
char *copy = strdup(new);
202
char *copy;
203
do {
204
copy = strdup(new);
205
} while(copy == NULL and errno == EINTR);
166
206
if(copy == NULL){
167
207
return false;
168
208
}
175
215
}
176
216
177
217
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
178
219
static bool add_argument(plugin *p, const char *arg){
179
220
if(p == NULL){
180
221
return false;
183
224
}
184
225
185
226
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
186
228
static bool add_environment(plugin *p, const char *def, bool replace){
187
229
if(p == NULL){
188
230
return false;
190
232
/* namelen = length of name of environment variable */
191
233
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
234
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
195
237
/* It already exists */
196
238
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
239
char *new_envdef;
240
do {
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
199
244
return false;
200
245
}
201
*e = new;
202
strcpy(*e, def);
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
203
248
}
204
249
return true;
205
250
}
207
252
return add_to_char_array(def, &(p->environ), &(p->envc));
208
253
}
209
254
255
#ifndef O_CLOEXEC
210
256
/*
211
257
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
258
* Descriptor Flags".
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
259
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
260
*/
261
__attribute__((warn_unused_result))
215
262
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
264
/* If reading the flags failed, return error indication now. */
218
265
if(ret < 0){
219
266
return ret;
220
267
}
221
268
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
ret | FD_CLOEXEC));
223
271
}
272
#endif /* not O_CLOEXEC */
224
273
225
274
226
275
/* Mark processes as completed when they exit, and save their exit
240
289
/* No child processes */
241
290
break;
242
291
}
243
perror("waitpid");
292
error(0, errno, "waitpid");
244
293
}
245
294
246
295
/* A child exited, find it in process_list */
258
307
}
259
308
260
309
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
261
311
static bool print_out_password(const char *buffer, size_t length){
262
312
ssize_t ret;
263
313
for(size_t written = 0; written < length; written += (size_t)ret){
271
321
}
272
322
273
323
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
274
325
static void free_plugin(plugin *plugin_node){
275
326
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
277
328
free(*arg);
278
329
}
330
free(plugin_node->name);
279
331
free(plugin_node->argv);
280
332
for(char **env = plugin_node->environ; *env != NULL; env++){
281
333
free(*env);
308
360
309
361
int main(int argc, char *argv[]){
310
362
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
311
364
char *argfile = NULL;
312
365
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
366
struct dirent **direntries = NULL;
316
367
struct stat st;
317
368
fd_set rfds_all;
318
369
int ret, maxfd = 0;
319
370
ssize_t sret;
320
intmax_t tmpmax;
321
371
uid_t uid = 65534;
322
372
gid_t gid = 65534;
323
373
bool debug = false;
327
377
.sa_flags = SA_NOCLDSTOP };
328
378
char **custom_argv = NULL;
329
379
int custom_argc = 0;
380
int dir_fd = -1;
330
381
331
382
/* Establish a signal handler */
332
383
sigemptyset(&sigchld_action.sa_mask);
333
384
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
385
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
337
388
goto fallback;
338
389
}
339
390
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
391
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
343
394
goto fallback;
344
395
}
345
396
377
428
.doc = "Group ID the plugins will run as", .group = 3 },
378
429
{ .name = "debug", .key = 132,
379
430
.doc = "Debug mode", .group = 4 },
431
{ .name = "plugin-helper-dir", .key = 133,
432
.arg = "DIRECTORY",
433
.doc = "Specify a different plugin helper directory",
434
.group = 2 },
435
/*
436
* These reproduce what we would get without ARGP_NO_HELP
437
*/
438
{ .name = "help", .key = '?',
439
.doc = "Give this help list", .group = -1 },
440
{ .name = "usage", .key = -3,
441
.doc = "Give a short usage message", .group = -1 },
442
{ .name = "version", .key = 'V',
443
.doc = "Print program version", .group = -1 },
380
444
{ .name = NULL }
381
445
};
382
446
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
386
450
switch(key){
451
char *tmp;
452
intmax_t tmp_id;
387
453
case 'g': /* --global-options */
388
if(arg != NULL){
454
{
389
455
char *plugin_option;
390
456
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
457
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
458
break;
397
459
}
398
460
}
461
errno = 0;
399
462
}
400
463
break;
401
464
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
407
467
}
408
468
break;
409
469
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;
470
{
471
char *option_list = strchr(arg, ':');
472
if(option_list == NULL){
473
argp_error(state, "No colon in \"%s\"", arg);
474
errno = EINVAL;
475
break;
476
}
477
*option_list = '\0';
478
option_list++;
479
if(arg[0] == '\0'){
480
argp_error(state, "Empty plugin name");
481
errno = EINVAL;
482
break;
483
}
484
char *option;
485
while((option = strsep(&option_list, ",")) != NULL){
486
if(not add_argument(getplugin(arg), option)){
487
break;
420
488
}
421
489
}
490
errno = 0;
422
491
}
423
492
break;
424
493
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
494
{
429
495
char *envdef = strchr(arg, ':');
430
496
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
431
499
break;
432
500
}
433
501
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
502
envdef++;
503
if(arg[0] == '\0'){
504
argp_error(state, "Empty plugin name");
505
errno = EINVAL;
506
break;
507
}
508
if(add_environment(getplugin(arg), envdef, true)){
509
errno = 0;
436
510
}
437
511
}
438
512
break;
439
513
case 'd': /* --disable */
440
if(arg != NULL){
514
{
441
515
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
444
519
}
445
p->disabled = true;
446
520
}
447
521
break;
448
522
case 'e': /* --enable */
449
if(arg != NULL){
523
{
450
524
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
453
528
}
454
p->disabled = false;
455
529
}
456
530
break;
457
531
case 128: /* --plugin-dir */
458
532
free(plugindir);
459
533
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
534
if(plugindir != NULL){
535
errno = 0;
462
536
}
463
537
break;
464
538
case 129: /* --config-file */
465
539
/* This is already done by parse_opt_config_file() */
466
540
break;
467
541
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
470
543
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;
544
or tmp_id != (uid_t)tmp_id){
545
argp_error(state, "Bad user ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)uid);
547
break;
476
548
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
477
551
break;
478
552
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
553
tmp_id = strtoimax(arg, &tmp, 10);
481
554
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;
555
or tmp_id != (gid_t)tmp_id){
556
argp_error(state, "Bad group ID number: \"%s\", using %"
557
PRIdMAX, arg, (intmax_t)gid);
558
break;
487
559
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
488
562
break;
489
563
case 132: /* --debug */
490
564
debug = true;
491
565
break;
566
case 133: /* --plugin-helper-dir */
567
free(pluginhelperdir);
568
pluginhelperdir = strdup(arg);
569
if(pluginhelperdir != NULL){
570
errno = 0;
571
}
572
break;
573
/*
574
* These reproduce what we would get without ARGP_NO_HELP
575
*/
576
case '?': /* --help */
577
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
case -3: /* --usage */
581
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
argp_state_help(state, state->out_stream,
583
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
case 'V': /* --version */
586
fprintf(state->out_stream, "%s\n", argp_program_version);
587
exit(EXIT_SUCCESS);
588
break;
492
589
/*
493
590
* When adding more options before this line, remember to also add a
494
591
* "case" to the "parse_opt_config_file" function below.
497
594
/* Cryptsetup always passes an argument, which is an empty
498
595
string if "none" was specified in /etc/crypttab. So if
499
596
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
597
if(arg[0] == '\0'){
598
break;
502
599
}
503
break;
504
case ARGP_KEY_END:
505
break;
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
506
605
default:
507
606
return ARGP_ERR_UNKNOWN;
508
607
}
509
return 0;
608
return errno; /* Set to 0 at start */
510
609
}
511
610
512
611
/* This option parser is the same as parse_opt() above, except it
514
613
error_t parse_opt_config_file(int key, char *arg,
515
614
__attribute__((unused))
516
615
struct argp_state *state){
616
errno = 0;
517
617
switch(key){
518
618
case 'g': /* --global-options */
519
619
case 'G': /* --global-env */
526
626
case 129: /* --config-file */
527
627
free(argfile);
528
628
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
629
if(argfile != NULL){
630
errno = 0;
531
631
}
532
632
break;
533
633
case 130: /* --userid */
534
634
case 131: /* --groupid */
535
635
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
536
640
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
641
break;
539
642
default:
540
643
return ARGP_ERR_UNKNOWN;
541
644
}
542
return 0;
645
return errno;
543
646
}
544
647
545
648
struct argp argp = { .options = options,
549
652
550
653
/* Parse using parse_opt_config_file() in order to get the custom
551
654
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;
655
ret = argp_parse(&argp, argc, argv,
656
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
657
NULL, NULL);
658
switch(ret){
659
case 0:
660
break;
661
case ENOMEM:
662
default:
663
errno = ret;
664
error(0, errno, "argp_parse");
665
exitstatus = EX_OSERR;
666
goto fallback;
667
case EINVAL:
668
exitstatus = EX_USAGE;
556
669
goto fallback;
557
670
}
558
671
575
688
custom_argc = 1;
576
689
custom_argv = malloc(sizeof(char*) * 2);
577
690
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
580
693
goto fallback;
581
694
}
582
695
custom_argv[0] = argv[0];
598
711
}
599
712
new_arg = strdup(p);
600
713
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
603
716
free(org_line);
604
717
goto fallback;
605
718
}
606
719
607
720
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;
721
{
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
724
sizeof(char *));
725
#else
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
728
/* overflow */
729
errno = ENOMEM;
730
} else {
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
732
* sizeof(char *));
733
}
734
#endif
735
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
737
exitstatus = EX_OSERR;
738
free(new_arg);
739
free(org_line);
740
goto fallback;
741
} else {
742
custom_argv = new_argv;
743
}
615
744
}
616
745
custom_argv[custom_argc-1] = new_arg;
617
746
custom_argv[custom_argc] = NULL;
618
747
}
619
748
}
749
do {
750
ret = fclose(conffp);
751
} while(ret == EOF and errno == EINTR);
752
if(ret == EOF){
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
755
goto fallback;
756
}
620
757
free(org_line);
621
758
} else {
622
759
/* Check for harmful errors and go to fallback. Other errors might
623
760
not affect opening plugins */
624
761
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
627
764
goto fallback;
628
765
}
629
766
}
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
632
769
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;
770
ret = argp_parse(&argp, custom_argc, custom_argv,
771
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
772
NULL, NULL);
773
switch(ret){
774
case 0:
775
break;
776
case ENOMEM:
777
default:
778
errno = ret;
779
error(0, errno, "argp_parse");
780
exitstatus = EX_OSERR;
781
goto fallback;
782
case EINVAL:
783
exitstatus = EX_CONFIG;
638
784
goto fallback;
639
785
}
640
786
}
641
787
642
788
/* Parse actual command line arguments, to let them override the
643
789
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;
790
ret = argp_parse(&argp, argc, argv,
791
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
792
NULL, NULL);
793
switch(ret){
794
case 0:
795
break;
796
case ENOMEM:
797
default:
798
errno = ret;
799
error(0, errno, "argp_parse");
800
exitstatus = EX_OSERR;
801
goto fallback;
802
case EINVAL:
803
exitstatus = EX_USAGE;
804
goto fallback;
805
}
806
807
{
808
char *pluginhelperenv;
809
bool bret = true;
810
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
811
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
812
if(ret != -1){
813
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
814
}
815
if(ret == -1 or not bret){
816
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
817
" environment variable to \"%s\" for all plugins\n",
818
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
819
}
820
if(ret != -1){
821
free(pluginhelperenv);
822
}
649
823
}
650
824
651
825
if(debug){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
653
827
fprintf(stderr, "Plugin: %s has %d arguments\n",
654
828
p->name ? p->name : "Global", p->argc - 1);
655
829
for(char **a = p->argv; *a != NULL; a++){
662
836
}
663
837
}
664
838
665
/* Strip permissions down to nobody */
666
setgid(gid);
839
if(getuid() == 0){
840
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
842
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
if(plugindir_fd == -1){
844
if(errno != ENOENT){
845
error(0, errno, "open(\"" PDIR "\")");
846
}
847
} else {
848
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
849
if(ret == -1){
850
error(0, errno, "fstat");
851
} else {
852
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
853
ret = fchown(plugindir_fd, uid, gid);
854
if(ret == -1){
855
error(0, errno, "fchown");
856
}
857
}
858
}
859
close(plugindir_fd);
860
}
861
}
862
863
/* Lower permissions */
864
ret = setgid(gid);
667
865
if(ret == -1){
668
perror("setgid");
866
error(0, errno, "setgid");
669
867
}
670
868
ret = setuid(uid);
671
869
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 */
870
error(0, errno, "setuid");
871
}
872
873
/* Open plugin directory with close_on_exec flag */
688
874
{
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;
875
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
876
#ifdef O_CLOEXEC
877
O_CLOEXEC
878
#else /* not O_CLOEXEC */
879
0
880
#endif /* not O_CLOEXEC */
881
);
882
if(dir_fd == -1){
883
error(0, errno, "Could not open plugin dir");
884
exitstatus = EX_UNAVAILABLE;
885
goto fallback;
886
}
887
888
#ifndef O_CLOEXEC
889
/* Set the FD_CLOEXEC flag on the directory */
890
ret = set_cloexec_flag(dir_fd);
891
if(ret < 0){
892
error(0, errno, "set_cloexec_flag");
893
exitstatus = EX_OSERR;
894
goto fallback;
895
}
896
#endif /* O_CLOEXEC */
897
}
898
899
int good_name(const struct dirent * const dirent){
900
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
901
"*.dpkg-old", "*.dpkg-bak",
902
"*.dpkg-divert", NULL };
903
#ifdef __GNUC__
904
#pragma GCC diagnostic push
905
#pragma GCC diagnostic ignored "-Wcast-qual"
906
#endif
907
for(const char **pat = (const char **)patterns;
908
*pat != NULL; pat++){
909
#ifdef __GNUC__
910
#pragma GCC diagnostic pop
911
#endif
912
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
913
!= FNM_NOMATCH){
914
if(debug){
915
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
916
" matching pattern %s\n", dirent->d_name, *pat);
917
}
918
return 0;
696
919
}
697
920
}
921
return 1;
922
}
923
924
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
925
alphasort);
926
if(numplugins == -1){
927
error(0, errno, "Could not scan plugin dir");
928
direntries = NULL;
929
exitstatus = EX_OSERR;
930
goto fallback;
698
931
}
699
932
700
933
FD_ZERO(&rfds_all);
701
934
702
935
/* 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");
936
for(int i = 0; i < numplugins; i++){
937
938
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
939
if(plugin_fd == -1){
940
error(0, errno, "Could not open plugin");
941
free(direntries[i]);
770
942
continue;
771
943
}
772
773
ret = stat(filename, &st);
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
774
945
if(ret == -1){
775
perror("stat");
776
free(filename);
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
777
949
continue;
778
950
}
779
951
780
952
/* Ignore non-executable files */
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
953
if(not S_ISREG(st.st_mode)
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
782
956
if(debug){
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
957
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
958
" with bad type or mode\n",
959
plugindir != NULL ? plugindir : PDIR,
960
direntries[i]->d_name);
785
961
}
786
free(filename);
962
close(plugin_fd);
963
free(direntries[i]);
787
964
continue;
788
965
}
789
966
790
plugin *p = getplugin(dirst->d_name);
967
plugin *p = getplugin(direntries[i]->d_name);
791
968
if(p == NULL){
792
perror("getplugin");
793
free(filename);
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
794
972
continue;
795
973
}
796
974
if(p->disabled){
797
975
if(debug){
798
976
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
799
dirst->d_name);
977
direntries[i]->d_name);
800
978
}
801
free(filename);
979
close(plugin_fd);
980
free(direntries[i]);
802
981
continue;
803
982
}
804
983
{
807
986
if(g != NULL){
808
987
for(char **a = g->argv + 1; *a != NULL; a++){
809
988
if(not add_argument(p, *a)){
810
perror("add_argument");
989
error(0, errno, "add_argument");
811
990
}
812
991
}
813
992
/* Add global environment variables */
814
993
for(char **e = g->environ; *e != NULL; e++){
815
994
if(not add_environment(p, *e, false)){
816
perror("add_environment");
995
error(0, errno, "add_environment");
817
996
}
818
997
}
819
998
}
820
999
}
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. */
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
824
1002
if(p->environ[0] != NULL){
825
1003
for(char **e = environ; *e != NULL; e++){
826
1004
if(not add_environment(p, *e, false)){
827
perror("add_environment");
1005
error(0, errno, "add_environment");
828
1006
}
829
1007
}
830
1008
}
831
1009
832
1010
int pipefd[2];
833
ret = pipe(pipefd);
1011
#ifndef O_CLOEXEC
1012
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1013
#else /* O_CLOEXEC */
1014
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1015
#endif /* O_CLOEXEC */
834
1016
if(ret == -1){
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
1017
error(0, errno, "pipe");
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
goto fallback;
1021
}
1022
if(pipefd[0] >= FD_SETSIZE){
1023
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1024
FD_SETSIZE);
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
#ifndef O_CLOEXEC
839
1032
/* Ask OS to automatic close the pipe on exec */
840
1033
ret = set_cloexec_flag(pipefd[0]);
841
1034
if(ret < 0){
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
844
1040
goto fallback;
845
1041
}
846
1042
ret = set_cloexec_flag(pipefd[1]);
847
1043
if(ret < 0){
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
850
1049
goto fallback;
851
1050
}
1051
#endif /* not O_CLOEXEC */
852
1052
/* Block SIGCHLD until process is safely in process list */
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1053
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
&sigchld_action.sa_mask,
1055
NULL));
854
1056
if(ret < 0){
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
857
1060
goto fallback;
858
1061
}
859
1062
/* Starting a new process to be watched */
860
pid_t pid = fork();
1063
pid_t pid;
1064
do {
1065
pid = fork();
1066
} while(pid == -1 and errno == EINTR);
861
1067
if(pid == -1){
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1068
error(0, errno, "fork");
1069
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1070
&sigchld_action.sa_mask, NULL));
1071
close(pipefd[0]);
1072
close(pipefd[1]);
1073
exitstatus = EX_OSERR;
1074
free(direntries[i]);
864
1075
goto fallback;
865
1076
}
866
1077
if(pid == 0){
867
1078
/* this is the child process */
868
1079
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
869
1080
if(ret < 0){
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
872
1083
}
873
1084
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
1085
if(ret < 0){
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
877
1088
}
878
1089
879
1090
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
880
1091
if(ret == -1){
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
883
1094
}
884
1095
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
}
1096
if(fexecve(plugin_fd, p->argv,
1097
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1098
error(0, errno, "fexecve for %s/%s",
1099
plugindir != NULL ? plugindir : PDIR,
1100
direntries[i]->d_name);
1101
_exit(EX_OSERR);
900
1102
}
901
1103
/* no return */
902
1104
}
903
1105
/* Parent process */
904
1106
close(pipefd[1]); /* Close unused write end of pipe */
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
907
1109
if(new_plugin == NULL){
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1110
error(0, errno, "getplugin");
1111
ret = (int)(TEMP_FAILURE_RETRY
1112
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1113
NULL)));
910
1114
if(ret < 0){
911
perror("sigprocmask");
1115
error(0, errno, "sigprocmask");
912
1116
}
913
exitstatus = EXIT_FAILURE;
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
914
1119
goto fallback;
915
1120
}
1121
free(direntries[i]);
916
1122
917
1123
new_plugin->pid = pid;
918
1124
new_plugin->fd = pipefd[0];
919
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
920
1131
/* Unblock SIGCHLD so signal handler can be run if this process
921
1132
has already completed */
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1134
&sigchld_action.sa_mask,
1135
NULL));
923
1136
if(ret < 0){
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
926
1139
goto fallback;
927
1140
}
928
1141
933
1146
}
934
1147
}
935
1148
936
closedir(dir);
937
dir = NULL;
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
938
1153
free_plugin(getplugin(NULL));
939
1154
940
1155
for(plugin *p = plugin_list; p != NULL; p = p->next){
952
1167
while(plugin_list){
953
1168
fd_set rfds = rfds_all;
954
1169
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1170
if(select_ret == -1 and errno != EINTR){
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
958
1173
goto fallback;
959
1174
}
960
1175
/* OK, now either a process completed, or something can be read
979
1194
(intmax_t) (proc->pid),
980
1195
WTERMSIG(proc->status),
981
1196
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
1197
}
986
1198
}
987
1199
989
1201
FD_CLR(proc->fd, &rfds_all);
990
1202
991
1203
/* Block signal while modifying process_list */
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1204
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1205
(SIG_BLOCK,
1206
&sigchld_action.sa_mask,
1207
NULL));
993
1208
if(ret < 0){
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
996
1211
goto fallback;
997
1212
}
998
1213
1001
1216
proc = next_plugin;
1002
1217
1003
1218
/* We are done modifying process list, so unblock signal */
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1219
ret = (int)(TEMP_FAILURE_RETRY
1220
(sigprocmask(SIG_UNBLOCK,
1221
&sigchld_action.sa_mask, NULL)));
1006
1222
if(ret < 0){
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1009
1225
goto fallback;
1010
1226
}
1011
1227
1021
1237
bool bret = print_out_password(proc->buffer,
1022
1238
proc->buffer_length);
1023
1239
if(not bret){
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1026
1242
}
1027
1243
goto fallback;
1028
1244
}
1035
1251
}
1036
1252
/* Before reading, make the process' data buffer large enough */
1037
1253
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;
1254
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1255
+ (size_t) BUFFER_SIZE);
1256
if(new_buffer == NULL){
1257
error(0, errno, "malloc");
1258
exitstatus = EX_OSERR;
1043
1259
goto fallback;
1044
1260
}
1261
proc->buffer = new_buffer;
1045
1262
proc->buffer_size += BUFFER_SIZE;
1046
1263
}
1047
1264
/* Read from the process */
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1265
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1266
proc->buffer
1267
+ proc->buffer_length,
1268
BUFFER_SIZE));
1050
1269
if(sret < 0){
1051
1270
/* Read error from this process; ignore the error */
1052
1271
proc = proc->next;
1064
1283
1065
1284
fallback:
1066
1285
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1068
1288
/* Fallback if all plugins failed, none are found or an error
1069
1289
occured */
1070
1290
bool bret;
1078
1298
}
1079
1299
bret = print_out_password(passwordbuffer, len);
1080
1300
if(not bret){
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1083
1303
}
1084
1304
}
1085
1305
1086
1306
/* Restore old signal handler */
1087
1307
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1088
1308
if(ret == -1){
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1091
1311
}
1092
1312
1093
1313
if(custom_argv != NULL){
1097
1317
free(custom_argv);
1098
1318
}
1099
1319
1100
if(dir != NULL){
1101
closedir(dir);
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1102
1324
}
1103
1325
1104
1326
/* Kill the processes */
1108
1330
ret = kill(p->pid, SIGTERM);
1109
1331
if(ret == -1 and errno != ESRCH){
1110
1332
/* Set-uid proccesses might not get closed */
1111
perror("kill");
1333
error(0, errno, "kill");
1112
1334
}
1113
1335
}
1114
1336
}
1115
1337
1116
1338
/* Wait for any remaining child processes to terminate */
1117
do{
1339
do {
1118
1340
ret = wait(NULL);
1119
1341
} while(ret >= 0);
1120
1342
if(errno != ECHILD){
1121
perror("wait");
1343
error(0, errno, "wait");
1122
1344
}
1123
1345
1124
1346
free_plugin_list();
1125
1347
1126
1348
free(plugindir);
1349
free(pluginhelperdir);
1127
1350
free(argfile);
1128
1351
1129
1352
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0