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- Committer: Teddy Hogeborn
- Date: 2019-02-28 20:57:45 UTC
- Revision ID: teddy@recompile.se-20190228205745-zl3bd1yoz0q343lm
mandos-ctl: Use isinstance(x, X) instead of type(x) is X
* mandos-ctl (print_clients): Don't use type(value) and check for
dbus.Boolean instances exactly; use
isinstance() to be more generic.
* mandos-ctl (print_clients): Don't use type(value) and check for
dbus.Boolean instances exactly; use
isinstance() to be more generic.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
74
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
75
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
81
77
82
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
84
80
85
typedef struct plugin{
81
86
char *name; /* can be NULL or any plugin name */
101
106
102
107
/* Gets an existing plugin based on name,
103
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
104
110
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
106
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
113
if((p->name == name)
108
114
or (p->name and name and (strcmp(p->name, name) == 0))){
110
116
}
111
117
}
112
118
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
114
123
if(new_plugin == NULL){
115
124
return NULL;
116
125
}
117
126
char *copy_name = NULL;
118
127
if(name != NULL){
119
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
120
131
if(copy_name == NULL){
132
int e = errno;
121
133
free(new_plugin);
134
errno = e;
122
135
return NULL;
123
136
}
124
137
}
128
141
.disabled = false,
129
142
.next = plugin_list };
130
143
131
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
132
147
if(new_plugin->argv == NULL){
148
int e = errno;
133
149
free(copy_name);
134
150
free(new_plugin);
151
errno = e;
135
152
return NULL;
136
153
}
137
154
new_plugin->argv[0] = copy_name;
138
155
new_plugin->argv[1] = NULL;
139
156
140
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
141
160
if(new_plugin->environ == NULL){
161
int e = errno;
142
162
free(copy_name);
143
163
free(new_plugin->argv);
144
164
free(new_plugin);
165
errno = e;
145
166
return NULL;
146
167
}
147
168
new_plugin->environ[0] = NULL;
152
173
}
153
174
154
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
155
177
static bool add_to_char_array(const char *new, char ***array,
156
178
int *len){
157
179
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
160
185
/* Malloc check */
161
if(*array == NULL){
186
if(new_array == NULL){
162
187
return false;
163
188
}
189
*array = new_array;
164
190
/* Make a copy of the new string */
165
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
166
195
if(copy == NULL){
167
196
return false;
168
197
}
175
204
}
176
205
177
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
178
208
static bool add_argument(plugin *p, const char *arg){
179
209
if(p == NULL){
180
210
return false;
183
213
}
184
214
185
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
186
217
static bool add_environment(plugin *p, const char *def, bool replace){
187
218
if(p == NULL){
188
219
return false;
190
221
/* namelen = length of name of environment variable */
191
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
223
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
195
226
/* It already exists */
196
227
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
199
233
return false;
200
234
}
201
*e = new;
202
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
203
237
}
204
238
return true;
205
239
}
207
241
return add_to_char_array(def, &(p->environ), &(p->envc));
208
242
}
209
243
244
#ifndef O_CLOEXEC
210
245
/*
211
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
247
* Descriptor Flags".
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
249
*/
250
__attribute__((warn_unused_result))
215
251
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
253
/* If reading the flags failed, return error indication now. */
218
254
if(ret < 0){
219
255
return ret;
220
256
}
221
257
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
223
260
}
261
#endif /* not O_CLOEXEC */
224
262
225
263
226
264
/* Mark processes as completed when they exit, and save their exit
240
278
/* No child processes */
241
279
break;
242
280
}
243
perror("waitpid");
281
error(0, errno, "waitpid");
244
282
}
245
283
246
284
/* A child exited, find it in process_list */
258
296
}
259
297
260
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
261
300
static bool print_out_password(const char *buffer, size_t length){
262
301
ssize_t ret;
263
302
for(size_t written = 0; written < length; written += (size_t)ret){
271
310
}
272
311
273
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
274
314
static void free_plugin(plugin *plugin_node){
275
315
276
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
308
348
309
349
int main(int argc, char *argv[]){
310
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
311
352
char *argfile = NULL;
312
353
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
354
struct dirent **direntries = NULL;
316
355
struct stat st;
317
356
fd_set rfds_all;
318
357
int ret, maxfd = 0;
319
358
ssize_t sret;
320
intmax_t tmpmax;
321
359
uid_t uid = 65534;
322
360
gid_t gid = 65534;
323
361
bool debug = false;
327
365
.sa_flags = SA_NOCLDSTOP };
328
366
char **custom_argv = NULL;
329
367
int custom_argc = 0;
368
int dir_fd = -1;
330
369
331
370
/* Establish a signal handler */
332
371
sigemptyset(&sigchld_action.sa_mask);
333
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
373
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
337
376
goto fallback;
338
377
}
339
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
379
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
343
382
goto fallback;
344
383
}
345
384
377
416
.doc = "Group ID the plugins will run as", .group = 3 },
378
417
{ .name = "debug", .key = 132,
379
418
.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 },
380
432
{ .name = NULL }
381
433
};
382
434
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
386
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
387
441
case 'g': /* --global-options */
388
if(arg != NULL){
442
{
389
443
char *plugin_option;
390
444
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
445
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
446
break;
397
447
}
398
448
}
449
errno = 0;
399
450
}
400
451
break;
401
452
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
407
455
}
408
456
break;
409
457
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;
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;
420
476
}
421
477
}
478
errno = 0;
422
479
}
423
480
break;
424
481
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
482
{
429
483
char *envdef = strchr(arg, ':');
430
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
431
487
break;
432
488
}
433
489
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
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;
436
498
}
437
499
}
438
500
break;
439
501
case 'd': /* --disable */
440
if(arg != NULL){
502
{
441
503
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
444
507
}
445
p->disabled = true;
446
508
}
447
509
break;
448
510
case 'e': /* --enable */
449
if(arg != NULL){
511
{
450
512
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
453
516
}
454
p->disabled = false;
455
517
}
456
518
break;
457
519
case 128: /* --plugin-dir */
458
520
free(plugindir);
459
521
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
522
if(plugindir != NULL){
523
errno = 0;
462
524
}
463
525
break;
464
526
case 129: /* --config-file */
465
527
/* This is already done by parse_opt_config_file() */
466
528
break;
467
529
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
530
tmp_id = strtoimax(arg, &tmp, 10);
470
531
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;
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;
476
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
477
539
break;
478
540
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
541
tmp_id = strtoimax(arg, &tmp, 10);
481
542
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;
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;
487
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
488
550
break;
489
551
case 132: /* --debug */
490
552
debug = true;
491
553
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
__builtin_unreachable();
568
case -3: /* --usage */
569
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
570
argp_state_help(state, state->out_stream,
571
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
572
__builtin_unreachable();
573
case 'V': /* --version */
574
fprintf(state->out_stream, "%s\n", argp_program_version);
575
exit(EXIT_SUCCESS);
576
break;
492
577
/*
493
578
* When adding more options before this line, remember to also add a
494
579
* "case" to the "parse_opt_config_file" function below.
497
582
/* Cryptsetup always passes an argument, which is an empty
498
583
string if "none" was specified in /etc/crypttab. So if
499
584
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
585
if(arg[0] == '\0'){
586
break;
502
587
}
503
break;
504
case ARGP_KEY_END:
505
break;
588
/* FALLTHROUGH */
506
589
default:
507
590
return ARGP_ERR_UNKNOWN;
508
591
}
509
return 0;
592
return errno; /* Set to 0 at start */
510
593
}
511
594
512
595
/* This option parser is the same as parse_opt() above, except it
514
597
error_t parse_opt_config_file(int key, char *arg,
515
598
__attribute__((unused))
516
599
struct argp_state *state){
600
errno = 0;
517
601
switch(key){
518
602
case 'g': /* --global-options */
519
603
case 'G': /* --global-env */
526
610
case 129: /* --config-file */
527
611
free(argfile);
528
612
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
613
if(argfile != NULL){
614
errno = 0;
531
615
}
532
616
break;
533
617
case 130: /* --userid */
534
618
case 131: /* --groupid */
535
619
case 132: /* --debug */
620
case 133: /* --plugin-helper-dir */
621
case '?': /* --help */
622
case -3: /* --usage */
623
case 'V': /* --version */
536
624
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
625
break;
539
626
default:
540
627
return ARGP_ERR_UNKNOWN;
541
628
}
542
return 0;
629
return errno;
543
630
}
544
631
545
632
struct argp argp = { .options = options,
549
636
550
637
/* Parse using parse_opt_config_file() in order to get the custom
551
638
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;
639
ret = argp_parse(&argp, argc, argv,
640
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
641
NULL, NULL);
642
switch(ret){
643
case 0:
644
break;
645
case ENOMEM:
646
default:
647
errno = ret;
648
error(0, errno, "argp_parse");
649
exitstatus = EX_OSERR;
650
goto fallback;
651
case EINVAL:
652
exitstatus = EX_USAGE;
556
653
goto fallback;
557
654
}
558
655
575
672
custom_argc = 1;
576
673
custom_argv = malloc(sizeof(char*) * 2);
577
674
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
675
error(0, errno, "malloc");
676
exitstatus = EX_OSERR;
580
677
goto fallback;
581
678
}
582
679
custom_argv[0] = argv[0];
598
695
}
599
696
new_arg = strdup(p);
600
697
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
698
error(0, errno, "strdup");
699
exitstatus = EX_OSERR;
603
700
free(org_line);
604
701
goto fallback;
605
702
}
606
703
607
704
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;
705
{
706
char **new_argv = realloc(custom_argv, sizeof(char *)
707
* ((size_t)custom_argc + 1));
708
if(new_argv == NULL){
709
error(0, errno, "realloc");
710
exitstatus = EX_OSERR;
711
free(new_arg);
712
free(org_line);
713
goto fallback;
714
} else {
715
custom_argv = new_argv;
716
}
615
717
}
616
718
custom_argv[custom_argc-1] = new_arg;
617
719
custom_argv[custom_argc] = NULL;
618
720
}
619
721
}
722
do {
723
ret = fclose(conffp);
724
} while(ret == EOF and errno == EINTR);
725
if(ret == EOF){
726
error(0, errno, "fclose");
727
exitstatus = EX_IOERR;
728
goto fallback;
729
}
620
730
free(org_line);
621
731
} else {
622
732
/* Check for harmful errors and go to fallback. Other errors might
623
733
not affect opening plugins */
624
734
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
735
error(0, errno, "fopen");
736
exitstatus = EX_OSERR;
627
737
goto fallback;
628
738
}
629
739
}
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
740
/* If there were any arguments from the configuration file, pass
741
them to parser as command line arguments */
632
742
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;
743
ret = argp_parse(&argp, custom_argc, custom_argv,
744
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
745
NULL, NULL);
746
switch(ret){
747
case 0:
748
break;
749
case ENOMEM:
750
default:
751
errno = ret;
752
error(0, errno, "argp_parse");
753
exitstatus = EX_OSERR;
754
goto fallback;
755
case EINVAL:
756
exitstatus = EX_CONFIG;
638
757
goto fallback;
639
758
}
640
759
}
641
760
642
761
/* Parse actual command line arguments, to let them override the
643
762
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;
763
ret = argp_parse(&argp, argc, argv,
764
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
765
NULL, NULL);
766
switch(ret){
767
case 0:
768
break;
769
case ENOMEM:
770
default:
771
errno = ret;
772
error(0, errno, "argp_parse");
773
exitstatus = EX_OSERR;
774
goto fallback;
775
case EINVAL:
776
exitstatus = EX_USAGE;
777
goto fallback;
778
}
779
780
{
781
char *pluginhelperenv;
782
bool bret = true;
783
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
784
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
785
if(ret != -1){
786
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
787
}
788
if(ret == -1 or not bret){
789
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
790
" environment variable to \"%s\" for all plugins\n",
791
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
792
}
793
if(ret != -1){
794
free(pluginhelperenv);
795
}
649
796
}
650
797
651
798
if(debug){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
799
for(plugin *p = plugin_list; p != NULL; p = p->next){
653
800
fprintf(stderr, "Plugin: %s has %d arguments\n",
654
801
p->name ? p->name : "Global", p->argc - 1);
655
802
for(char **a = p->argv; *a != NULL; a++){
662
809
}
663
810
}
664
811
665
/* Strip permissions down to nobody */
666
setgid(gid);
812
if(getuid() == 0){
813
/* Work around Debian bug #633582:
814
<https://bugs.debian.org/633582> */
815
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
816
if(plugindir_fd == -1){
817
if(errno != ENOENT){
818
error(0, errno, "open(\"" PDIR "\")");
819
}
820
} else {
821
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
822
if(ret == -1){
823
error(0, errno, "fstat");
824
} else {
825
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
826
ret = fchown(plugindir_fd, uid, gid);
827
if(ret == -1){
828
error(0, errno, "fchown");
829
}
830
}
831
}
832
close(plugindir_fd);
833
}
834
}
835
836
/* Lower permissions */
837
ret = setgid(gid);
667
838
if(ret == -1){
668
perror("setgid");
839
error(0, errno, "setgid");
669
840
}
670
841
ret = setuid(uid);
671
842
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 */
843
error(0, errno, "setuid");
844
}
845
846
/* Open plugin directory with close_on_exec flag */
688
847
{
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;
848
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
849
#ifdef O_CLOEXEC
850
O_CLOEXEC
851
#else /* not O_CLOEXEC */
852
0
853
#endif /* not O_CLOEXEC */
854
);
855
if(dir_fd == -1){
856
error(0, errno, "Could not open plugin dir");
857
exitstatus = EX_UNAVAILABLE;
858
goto fallback;
859
}
860
861
#ifndef O_CLOEXEC
862
/* Set the FD_CLOEXEC flag on the directory */
863
ret = set_cloexec_flag(dir_fd);
864
if(ret < 0){
865
error(0, errno, "set_cloexec_flag");
866
exitstatus = EX_OSERR;
867
goto fallback;
868
}
869
#endif /* O_CLOEXEC */
870
}
871
872
int good_name(const struct dirent * const dirent){
873
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
874
"*.dpkg-old", "*.dpkg-bak",
875
"*.dpkg-divert", NULL };
876
#ifdef __GNUC__
877
#pragma GCC diagnostic push
878
#pragma GCC diagnostic ignored "-Wcast-qual"
879
#endif
880
for(const char **pat = (const char **)patterns;
881
*pat != NULL; pat++){
882
#ifdef __GNUC__
883
#pragma GCC diagnostic pop
884
#endif
885
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
886
!= FNM_NOMATCH){
887
if(debug){
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
" matching pattern %s\n", dirent->d_name, *pat);
890
}
891
return 0;
696
892
}
697
893
}
894
return 1;
895
}
896
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
if(numplugins == -1){
900
error(0, errno, "Could not scan plugin dir");
901
direntries = NULL;
902
exitstatus = EX_OSERR;
903
goto fallback;
698
904
}
699
905
700
906
FD_ZERO(&rfds_all);
701
907
702
908
/* 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");
909
for(int i = 0; i < numplugins; i++){
910
911
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
912
if(plugin_fd == -1){
913
error(0, errno, "Could not open plugin");
914
free(direntries[i]);
770
915
continue;
771
916
}
772
773
ret = stat(filename, &st);
917
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
774
918
if(ret == -1){
775
perror("stat");
776
free(filename);
919
error(0, errno, "stat");
920
close(plugin_fd);
921
free(direntries[i]);
777
922
continue;
778
923
}
779
924
780
925
/* Ignore non-executable files */
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
926
if(not S_ISREG(st.st_mode)
927
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
928
X_OK, 0)) != 0)){
782
929
if(debug){
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
930
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
931
" with bad type or mode\n",
932
plugindir != NULL ? plugindir : PDIR,
933
direntries[i]->d_name);
785
934
}
786
free(filename);
935
close(plugin_fd);
936
free(direntries[i]);
787
937
continue;
788
938
}
789
939
790
plugin *p = getplugin(dirst->d_name);
940
plugin *p = getplugin(direntries[i]->d_name);
791
941
if(p == NULL){
792
perror("getplugin");
793
free(filename);
942
error(0, errno, "getplugin");
943
close(plugin_fd);
944
free(direntries[i]);
794
945
continue;
795
946
}
796
947
if(p->disabled){
797
948
if(debug){
798
949
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
799
dirst->d_name);
950
direntries[i]->d_name);
800
951
}
801
free(filename);
952
close(plugin_fd);
953
free(direntries[i]);
802
954
continue;
803
955
}
804
956
{
807
959
if(g != NULL){
808
960
for(char **a = g->argv + 1; *a != NULL; a++){
809
961
if(not add_argument(p, *a)){
810
perror("add_argument");
962
error(0, errno, "add_argument");
811
963
}
812
964
}
813
965
/* Add global environment variables */
814
966
for(char **e = g->environ; *e != NULL; e++){
815
967
if(not add_environment(p, *e, false)){
816
perror("add_environment");
968
error(0, errno, "add_environment");
817
969
}
818
970
}
819
971
}
820
972
}
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. */
973
/* If this plugin has any environment variables, we need to
974
duplicate the environment from this process, too. */
824
975
if(p->environ[0] != NULL){
825
976
for(char **e = environ; *e != NULL; e++){
826
977
if(not add_environment(p, *e, false)){
827
perror("add_environment");
978
error(0, errno, "add_environment");
828
979
}
829
980
}
830
981
}
831
982
832
983
int pipefd[2];
833
ret = pipe(pipefd);
984
#ifndef O_CLOEXEC
985
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
986
#else /* O_CLOEXEC */
987
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
988
#endif /* O_CLOEXEC */
834
989
if(ret == -1){
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
990
error(0, errno, "pipe");
991
exitstatus = EX_OSERR;
992
free(direntries[i]);
993
goto fallback;
994
}
995
if(pipefd[0] >= FD_SETSIZE){
996
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
997
FD_SETSIZE);
998
close(pipefd[0]);
999
close(pipefd[1]);
1000
exitstatus = EX_OSERR;
1001
free(direntries[i]);
1002
goto fallback;
1003
}
1004
#ifndef O_CLOEXEC
839
1005
/* Ask OS to automatic close the pipe on exec */
840
1006
ret = set_cloexec_flag(pipefd[0]);
841
1007
if(ret < 0){
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1008
error(0, errno, "set_cloexec_flag");
1009
close(pipefd[0]);
1010
close(pipefd[1]);
1011
exitstatus = EX_OSERR;
1012
free(direntries[i]);
844
1013
goto fallback;
845
1014
}
846
1015
ret = set_cloexec_flag(pipefd[1]);
847
1016
if(ret < 0){
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1017
error(0, errno, "set_cloexec_flag");
1018
close(pipefd[0]);
1019
close(pipefd[1]);
1020
exitstatus = EX_OSERR;
1021
free(direntries[i]);
850
1022
goto fallback;
851
1023
}
1024
#endif /* not O_CLOEXEC */
852
1025
/* Block SIGCHLD until process is safely in process list */
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1026
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1027
&sigchld_action.sa_mask,
1028
NULL));
854
1029
if(ret < 0){
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1030
error(0, errno, "sigprocmask");
1031
exitstatus = EX_OSERR;
1032
free(direntries[i]);
857
1033
goto fallback;
858
1034
}
859
1035
/* Starting a new process to be watched */
860
pid_t pid = fork();
1036
pid_t pid;
1037
do {
1038
pid = fork();
1039
} while(pid == -1 and errno == EINTR);
861
1040
if(pid == -1){
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1041
error(0, errno, "fork");
1042
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1043
&sigchld_action.sa_mask, NULL));
1044
close(pipefd[0]);
1045
close(pipefd[1]);
1046
exitstatus = EX_OSERR;
1047
free(direntries[i]);
864
1048
goto fallback;
865
1049
}
866
1050
if(pid == 0){
867
1051
/* this is the child process */
868
1052
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
869
1053
if(ret < 0){
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1054
error(0, errno, "sigaction");
1055
_exit(EX_OSERR);
872
1056
}
873
1057
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
1058
if(ret < 0){
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1059
error(0, errno, "sigprocmask");
1060
_exit(EX_OSERR);
877
1061
}
878
1062
879
1063
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
880
1064
if(ret == -1){
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1065
error(0, errno, "dup2");
1066
_exit(EX_OSERR);
883
1067
}
884
1068
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
}
1069
if(fexecve(plugin_fd, p->argv,
1070
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1071
error(0, errno, "fexecve for %s/%s",
1072
plugindir != NULL ? plugindir : PDIR,
1073
direntries[i]->d_name);
1074
_exit(EX_OSERR);
900
1075
}
901
1076
/* no return */
902
1077
}
903
1078
/* Parent process */
904
1079
close(pipefd[1]); /* Close unused write end of pipe */
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1080
close(plugin_fd);
1081
plugin *new_plugin = getplugin(direntries[i]->d_name);
907
1082
if(new_plugin == NULL){
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1083
error(0, errno, "getplugin");
1084
ret = (int)(TEMP_FAILURE_RETRY
1085
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1086
NULL)));
910
1087
if(ret < 0){
911
perror("sigprocmask");
1088
error(0, errno, "sigprocmask");
912
1089
}
913
exitstatus = EXIT_FAILURE;
1090
exitstatus = EX_OSERR;
1091
free(direntries[i]);
914
1092
goto fallback;
915
1093
}
1094
free(direntries[i]);
916
1095
917
1096
new_plugin->pid = pid;
918
1097
new_plugin->fd = pipefd[0];
919
1098
1099
if(debug){
1100
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1101
new_plugin->name, (intmax_t) (new_plugin->pid));
1102
}
1103
920
1104
/* Unblock SIGCHLD so signal handler can be run if this process
921
1105
has already completed */
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1106
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1107
&sigchld_action.sa_mask,
1108
NULL));
923
1109
if(ret < 0){
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1110
error(0, errno, "sigprocmask");
1111
exitstatus = EX_OSERR;
926
1112
goto fallback;
927
1113
}
928
1114
933
1119
}
934
1120
}
935
1121
936
closedir(dir);
937
dir = NULL;
1122
free(direntries);
1123
direntries = NULL;
1124
close(dir_fd);
1125
dir_fd = -1;
938
1126
free_plugin(getplugin(NULL));
939
1127
940
1128
for(plugin *p = plugin_list; p != NULL; p = p->next){
952
1140
while(plugin_list){
953
1141
fd_set rfds = rfds_all;
954
1142
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1143
if(select_ret == -1 and errno != EINTR){
1144
error(0, errno, "select");
1145
exitstatus = EX_OSERR;
958
1146
goto fallback;
959
1147
}
960
1148
/* OK, now either a process completed, or something can be read
979
1167
(intmax_t) (proc->pid),
980
1168
WTERMSIG(proc->status),
981
1169
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
1170
}
986
1171
}
987
1172
989
1174
FD_CLR(proc->fd, &rfds_all);
990
1175
991
1176
/* Block signal while modifying process_list */
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1177
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1178
(SIG_BLOCK,
1179
&sigchld_action.sa_mask,
1180
NULL));
993
1181
if(ret < 0){
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1182
error(0, errno, "sigprocmask");
1183
exitstatus = EX_OSERR;
996
1184
goto fallback;
997
1185
}
998
1186
1001
1189
proc = next_plugin;
1002
1190
1003
1191
/* We are done modifying process list, so unblock signal */
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1192
ret = (int)(TEMP_FAILURE_RETRY
1193
(sigprocmask(SIG_UNBLOCK,
1194
&sigchld_action.sa_mask, NULL)));
1006
1195
if(ret < 0){
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1196
error(0, errno, "sigprocmask");
1197
exitstatus = EX_OSERR;
1009
1198
goto fallback;
1010
1199
}
1011
1200
1021
1210
bool bret = print_out_password(proc->buffer,
1022
1211
proc->buffer_length);
1023
1212
if(not bret){
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1213
error(0, errno, "print_out_password");
1214
exitstatus = EX_IOERR;
1026
1215
}
1027
1216
goto fallback;
1028
1217
}
1035
1224
}
1036
1225
/* Before reading, make the process' data buffer large enough */
1037
1226
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;
1227
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1228
+ (size_t) BUFFER_SIZE);
1229
if(new_buffer == NULL){
1230
error(0, errno, "malloc");
1231
exitstatus = EX_OSERR;
1043
1232
goto fallback;
1044
1233
}
1234
proc->buffer = new_buffer;
1045
1235
proc->buffer_size += BUFFER_SIZE;
1046
1236
}
1047
1237
/* Read from the process */
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1238
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1239
proc->buffer
1240
+ proc->buffer_length,
1241
BUFFER_SIZE));
1050
1242
if(sret < 0){
1051
1243
/* Read error from this process; ignore the error */
1052
1244
proc = proc->next;
1064
1256
1065
1257
fallback:
1066
1258
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1259
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1260
and exitstatus != EX_OK)){
1068
1261
/* Fallback if all plugins failed, none are found or an error
1069
1262
occured */
1070
1263
bool bret;
1078
1271
}
1079
1272
bret = print_out_password(passwordbuffer, len);
1080
1273
if(not bret){
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1274
error(0, errno, "print_out_password");
1275
exitstatus = EX_IOERR;
1083
1276
}
1084
1277
}
1085
1278
1086
1279
/* Restore old signal handler */
1087
1280
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1088
1281
if(ret == -1){
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1282
error(0, errno, "sigaction");
1283
exitstatus = EX_OSERR;
1091
1284
}
1092
1285
1093
1286
if(custom_argv != NULL){
1097
1290
free(custom_argv);
1098
1291
}
1099
1292
1100
if(dir != NULL){
1101
closedir(dir);
1293
free(direntries);
1294
1295
if(dir_fd != -1){
1296
close(dir_fd);
1102
1297
}
1103
1298
1104
1299
/* Kill the processes */
1108
1303
ret = kill(p->pid, SIGTERM);
1109
1304
if(ret == -1 and errno != ESRCH){
1110
1305
/* Set-uid proccesses might not get closed */
1111
perror("kill");
1306
error(0, errno, "kill");
1112
1307
}
1113
1308
}
1114
1309
}
1115
1310
1116
1311
/* Wait for any remaining child processes to terminate */
1117
do{
1312
do {
1118
1313
ret = wait(NULL);
1119
1314
} while(ret >= 0);
1120
1315
if(errno != ECHILD){
1121
perror("wait");
1316
error(0, errno, "wait");
1122
1317
}
1123
1318
1124
1319
free_plugin_list();
1125
1320
1126
1321
free(plugindir);
1322
free(pluginhelperdir);
1127
1323
free(argfile);
1128
1324
1129
1325
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0