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- Committer: Teddy Hogeborn
- Date: 2009-09-08 04:41:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20090908044137-4cxubotvn4etoxxl
* plugins.d/mandos-client.c (main): Bug fix: Check result of setgid().
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2022 Teddy Hogeborn
6
* Copyright © 2008-2022 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
27
getline(), asprintf(), O_CLOEXEC,
28
scandirat(), pipe2() */
29
#include <argp.h> /* argp_program_version,
30
argp_program_bug_address,
31
struct argp_option,
32
struct argp_state, argp_error(),
33
ARGP_NO_EXIT, argp_state_help,
34
ARGP_HELP_STD_HELP,
35
ARGP_HELP_USAGE, ARGP_HELP_EXIT_OK,
36
ARGP_KEY_ARG, ARGP_ERR_UNKNOWN,
37
struct argp, argp_parse(),
38
ARGP_IN_ORDER, ARGP_NO_HELP */
39
#include <stdbool.h> /* bool, false, true */
40
#include <sys/types.h> /* pid_t, sig_atomic_t, uid_t, gid_t,
41
getuid(), setgid(), setuid() */
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
42
27
#include <stddef.h> /* size_t, NULL */
43
#include <iso646.h> /* or, and, not */
44
#include <string.h> /* strcmp(), strdup(), strchrnul(),
45
strncmp(), strlen(), strcpy(),
46
strsep(), strchr(), strsignal() */
47
#include <stdlib.h> /* malloc(), free(), reallocarray(),
48
realloc(), EXIT_SUCCESS */
49
#include <errno.h> /* errno, EINTR, ENOMEM, ECHILD,
50
error_t, EINVAL, EMFILE, ENFILE,
51
ENOENT, ESRCH */
52
#include <stdint.h> /* SIZE_MAX */
53
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
54
getline(), asprintf(), O_CLOEXEC,
55
scandirat(), pipe2() */
56
#include <unistd.h> /* TEMP_FAILURE_RETRY(), ssize_t,
57
write(), STDOUT_FILENO, uid_t,
58
gid_t, getuid(), fchown(), close(),
59
symlink(), setgid(), setuid(),
60
faccessat(), X_OK, pipe(), pipe2(),
61
fork(), _exit(), dup2(), fexecve(),
62
read(), getpass() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
#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() */
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
FD_SET(), FD_ISSET(), FD_CLR */
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
#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() */
63
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
64
FD_CLOEXEC, open(), O_RDONLY,
65
O_CLOEXEC, openat() */
66
#include <sys/wait.h> /* waitpid(), WNOHANG, WIFEXITED(),
67
WEXITSTATUS(), WIFSIGNALED(),
68
WTERMSIG(), wait() */
69
#include <error.h> /* error() */
70
#include <stdio.h> /* FILE, fprintf(), fopen(),
71
getline(), fclose(), EOF,
72
asprintf(), stderr */
73
#include <dirent.h> /* struct dirent, scandirat(),
74
alphasort() */
75
#include <sys/stat.h> /* struct stat, fstat(), S_ISDIR(),
76
lstat(), S_ISREG() */
77
#include <sys/select.h> /* fd_set, FD_ZERO(), FD_SETSIZE,
78
FD_SET(), select(), FD_CLR(),
79
FD_ISSET() */
80
#include <signal.h> /* struct sigaction, SA_NOCLDSTOP,
81
sigemptyset(), sigaddset(),
82
SIGCHLD, sigprocmask(), SIG_BLOCK,
83
SIG_UNBLOCK, kill(), SIGTERM */
84
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
85
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
86
#include <inttypes.h> /* intmax_t, strtoimax(), PRIdMAX */
87
#include <fnmatch.h> /* fnmatch(), FNM_FILE_NAME,
88
FNM_PERIOD, FNM_NOMATCH */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
58
#include <errno.h> /* errno */
59
#include <argp.h> /* struct argp_option, struct
60
argp_state, struct argp,
61
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
64
#include <signal.h> /* struct sigaction, sigemptyset(),
65
sigaddset(), sigaction(),
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
89
71
90
72
#define BUFFER_SIZE 256
91
73
92
74
#define PDIR "/lib/mandos/plugins.d"
93
#define PHDIR "/lib/mandos/plugin-helpers"
94
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
95
76
96
77
const char *argp_program_version = "plugin-runner " VERSION;
97
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
98
79
99
80
typedef struct plugin{
100
81
char *name; /* can be NULL or any plugin name */
120
101
121
102
/* Gets an existing plugin based on name,
122
103
or if none is found, creates a new one */
123
__attribute__((warn_unused_result))
124
104
static plugin *getplugin(char *name){
125
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
126
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
127
107
if((p->name == name)
128
108
or (p->name and name and (strcmp(p->name, name) == 0))){
143
123
copy_name = strdup(name);
144
124
} while(copy_name == NULL and errno == EINTR);
145
125
if(copy_name == NULL){
146
int e = errno;
147
126
free(new_plugin);
148
errno = e;
149
127
return NULL;
150
128
}
151
129
}
159
137
new_plugin->argv = malloc(sizeof(char *) * 2);
160
138
} while(new_plugin->argv == NULL and errno == EINTR);
161
139
if(new_plugin->argv == NULL){
162
int e = errno;
163
140
free(copy_name);
164
141
free(new_plugin);
165
errno = e;
166
142
return NULL;
167
143
}
168
144
new_plugin->argv[0] = copy_name;
172
148
new_plugin->environ = malloc(sizeof(char *));
173
149
} while(new_plugin->environ == NULL and errno == EINTR);
174
150
if(new_plugin->environ == NULL){
175
int e = errno;
176
151
free(copy_name);
177
152
free(new_plugin->argv);
178
153
free(new_plugin);
179
errno = e;
180
154
return NULL;
181
155
}
182
156
new_plugin->environ[0] = NULL;
187
161
}
188
162
189
163
/* Helper function for add_argument and add_environment */
190
__attribute__((nonnull, warn_unused_result))
191
164
static bool add_to_char_array(const char *new, char ***array,
192
165
int *len){
193
166
/* Resize the pointed-to array to hold one more pointer */
194
char **new_array = NULL;
195
167
do {
196
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
197
new_array = reallocarray(*array, (size_t)((*len) + 2),
198
sizeof(char *));
199
#else
200
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
201
/* overflow */
202
new_array = NULL;
203
errno = ENOMEM;
204
} else {
205
new_array = realloc(*array, (size_t)((*len) + 2)
206
* sizeof(char *));
207
}
208
#endif
209
} while(new_array == NULL and errno == EINTR);
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
210
171
/* Malloc check */
211
if(new_array == NULL){
172
if(*array == NULL){
212
173
return false;
213
174
}
214
*array = new_array;
215
175
/* Make a copy of the new string */
216
176
char *copy;
217
177
do {
229
189
}
230
190
231
191
/* Add to a plugin's argument vector */
232
__attribute__((nonnull(2), warn_unused_result))
233
192
static bool add_argument(plugin *p, const char *arg){
234
193
if(p == NULL){
235
194
return false;
238
197
}
239
198
240
199
/* Add to a plugin's environment */
241
__attribute__((nonnull(2), warn_unused_result))
242
200
static bool add_environment(plugin *p, const char *def, bool replace){
243
201
if(p == NULL){
244
202
return false;
246
204
/* namelen = length of name of environment variable */
247
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
248
206
/* Search for this environment variable */
249
for(char **envdef = p->environ; *envdef != NULL; envdef++){
250
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
251
209
/* It already exists */
252
210
if(replace){
253
char *new_envdef;
211
char *new;
254
212
do {
255
new_envdef = realloc(*envdef, strlen(def) + 1);
256
} while(new_envdef == NULL and errno == EINTR);
257
if(new_envdef == NULL){
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
258
216
return false;
259
217
}
260
*envdef = new_envdef;
261
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
262
220
}
263
221
return true;
264
222
}
266
224
return add_to_char_array(def, &(p->environ), &(p->envc));
267
225
}
268
226
269
#ifndef O_CLOEXEC
270
227
/*
271
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
272
229
* Descriptor Flags".
273
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
274
231
*/
275
__attribute__((warn_unused_result))
276
232
static int set_cloexec_flag(int fd){
277
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
278
234
/* If reading the flags failed, return error indication now. */
279
235
if(ret < 0){
280
236
return ret;
281
237
}
282
238
/* Store modified flag word in the descriptor. */
283
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
284
ret | FD_CLOEXEC));
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
285
240
}
286
#endif /* not O_CLOEXEC */
287
241
288
242
289
243
/* Mark processes as completed when they exit, and save their exit
303
257
/* No child processes */
304
258
break;
305
259
}
306
error(0, errno, "waitpid");
260
perror("waitpid");
307
261
}
308
262
309
263
/* A child exited, find it in process_list */
321
275
}
322
276
323
277
/* Prints out a password to stdout */
324
__attribute__((nonnull, warn_unused_result))
325
278
static bool print_out_password(const char *buffer, size_t length){
326
279
ssize_t ret;
327
280
for(size_t written = 0; written < length; written += (size_t)ret){
335
288
}
336
289
337
290
/* Removes and free a plugin from the plugin list */
338
__attribute__((nonnull))
339
291
static void free_plugin(plugin *plugin_node){
340
292
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
342
294
free(*arg);
343
295
}
344
free(plugin_node->name);
345
296
free(plugin_node->argv);
346
297
for(char **env = plugin_node->environ; *env != NULL; env++){
347
298
free(*env);
374
325
375
326
int main(int argc, char *argv[]){
376
327
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
378
328
char *argfile = NULL;
379
329
FILE *conffp;
380
struct dirent **direntries = NULL;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
381
333
struct stat st;
382
334
fd_set rfds_all;
383
335
int ret, maxfd = 0;
391
343
.sa_flags = SA_NOCLDSTOP };
392
344
char **custom_argv = NULL;
393
345
int custom_argc = 0;
394
int dir_fd = -1;
395
346
396
347
/* Establish a signal handler */
397
348
sigemptyset(&sigchld_action.sa_mask);
398
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
399
350
if(ret == -1){
400
error(0, errno, "sigaddset");
401
exitstatus = EX_OSERR;
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
402
353
goto fallback;
403
354
}
404
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
405
356
if(ret == -1){
406
error(0, errno, "sigaction");
407
exitstatus = EX_OSERR;
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
408
359
goto fallback;
409
360
}
410
361
442
393
.doc = "Group ID the plugins will run as", .group = 3 },
443
394
{ .name = "debug", .key = 132,
444
395
.doc = "Debug mode", .group = 4 },
445
{ .name = "plugin-helper-dir", .key = 133,
446
.arg = "DIRECTORY",
447
.doc = "Specify a different plugin helper directory",
448
.group = 2 },
449
/*
450
* These reproduce what we would get without ARGP_NO_HELP
451
*/
452
{ .name = "help", .key = '?',
453
.doc = "Give this help list", .group = -1 },
454
{ .name = "usage", .key = -3,
455
.doc = "Give a short usage message", .group = -1 },
456
{ .name = "version", .key = 'V',
457
.doc = "Print program version", .group = -1 },
458
396
{ .name = NULL }
459
397
};
460
398
461
__attribute__((nonnull(3)))
462
error_t parse_opt(int key, char *arg, struct argp_state *state){
463
errno = 0;
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
464
401
switch(key){
465
402
char *tmp;
466
intmax_t tmp_id;
403
intmax_t tmpmax;
467
404
case 'g': /* --global-options */
468
{
405
if(arg != NULL){
469
406
char *plugin_option;
470
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
471
411
if(not add_argument(getplugin(NULL), plugin_option)){
472
break;
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
473
414
}
474
415
}
475
errno = 0;
476
416
}
477
417
break;
478
418
case 'G': /* --global-env */
479
if(add_environment(getplugin(NULL), arg, true)){
480
errno = 0;
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
481
424
}
482
425
break;
483
426
case 'o': /* --options-for */
484
{
485
char *option_list = strchr(arg, ':');
486
if(option_list == NULL){
487
argp_error(state, "No colon in \"%s\"", arg);
488
errno = EINVAL;
489
break;
490
}
491
*option_list = '\0';
492
option_list++;
493
if(arg[0] == '\0'){
494
argp_error(state, "Empty plugin name");
495
errno = EINVAL;
496
break;
497
}
498
char *option;
499
while((option = strsep(&option_list, ",")) != NULL){
500
if(not add_argument(getplugin(arg), option)){
501
break;
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;
502
437
}
503
438
}
504
errno = 0;
505
439
}
506
440
break;
507
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
508
445
{
509
446
char *envdef = strchr(arg, ':');
510
447
if(envdef == NULL){
511
argp_error(state, "No colon in \"%s\"", arg);
512
errno = EINVAL;
513
448
break;
514
449
}
515
450
*envdef = '\0';
516
envdef++;
517
if(arg[0] == '\0'){
518
argp_error(state, "Empty plugin name");
519
errno = EINVAL;
520
break;
521
}
522
if(add_environment(getplugin(arg), envdef, true)){
523
errno = 0;
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
524
453
}
525
454
}
526
455
break;
527
456
case 'd': /* --disable */
528
{
457
if(arg != NULL){
529
458
plugin *p = getplugin(arg);
530
if(p != NULL){
531
p->disabled = true;
532
errno = 0;
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
533
461
}
462
p->disabled = true;
534
463
}
535
464
break;
536
465
case 'e': /* --enable */
537
{
466
if(arg != NULL){
538
467
plugin *p = getplugin(arg);
539
if(p != NULL){
540
p->disabled = false;
541
errno = 0;
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
542
470
}
471
p->disabled = false;
543
472
}
544
473
break;
545
474
case 128: /* --plugin-dir */
546
475
free(plugindir);
547
476
plugindir = strdup(arg);
548
if(plugindir != NULL){
549
errno = 0;
477
if(plugindir == NULL){
478
perror("strdup");
550
479
}
551
480
break;
552
481
case 129: /* --config-file */
553
482
/* This is already done by parse_opt_config_file() */
554
483
break;
555
484
case 130: /* --userid */
556
tmp_id = strtoimax(arg, &tmp, 10);
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
557
487
if(errno != 0 or tmp == arg or *tmp != '\0'
558
or tmp_id != (uid_t)tmp_id){
559
argp_error(state, "Bad user ID number: \"%s\", using %"
560
PRIdMAX, arg, (intmax_t)uid);
561
break;
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;
562
493
}
563
uid = (uid_t)tmp_id;
564
errno = 0;
565
494
break;
566
495
case 131: /* --groupid */
567
tmp_id = strtoimax(arg, &tmp, 10);
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
568
498
if(errno != 0 or tmp == arg or *tmp != '\0'
569
or tmp_id != (gid_t)tmp_id){
570
argp_error(state, "Bad group ID number: \"%s\", using %"
571
PRIdMAX, arg, (intmax_t)gid);
572
break;
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;
573
504
}
574
gid = (gid_t)tmp_id;
575
errno = 0;
576
505
break;
577
506
case 132: /* --debug */
578
507
debug = true;
579
508
break;
580
case 133: /* --plugin-helper-dir */
581
free(pluginhelperdir);
582
pluginhelperdir = strdup(arg);
583
if(pluginhelperdir != NULL){
584
errno = 0;
585
}
586
break;
587
/*
588
* These reproduce what we would get without ARGP_NO_HELP
589
*/
590
case '?': /* --help */
591
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
592
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
593
__builtin_unreachable();
594
case -3: /* --usage */
595
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
596
argp_state_help(state, state->out_stream,
597
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
598
__builtin_unreachable();
599
case 'V': /* --version */
600
fprintf(state->out_stream, "%s\n", argp_program_version);
601
exit(EXIT_SUCCESS);
602
break;
603
509
/*
604
510
* When adding more options before this line, remember to also add a
605
511
* "case" to the "parse_opt_config_file" function below.
608
514
/* Cryptsetup always passes an argument, which is an empty
609
515
string if "none" was specified in /etc/crypttab. So if
610
516
argument was empty, we ignore it silently. */
611
if(arg[0] == '\0'){
612
break;
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
613
519
}
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
520
break;
521
case ARGP_KEY_END:
522
break;
619
523
default:
620
524
return ARGP_ERR_UNKNOWN;
621
525
}
622
return errno; /* Set to 0 at start */
526
return 0;
623
527
}
624
528
625
529
/* This option parser is the same as parse_opt() above, except it
627
531
error_t parse_opt_config_file(int key, char *arg,
628
532
__attribute__((unused))
629
533
struct argp_state *state){
630
errno = 0;
631
534
switch(key){
632
535
case 'g': /* --global-options */
633
536
case 'G': /* --global-env */
640
543
case 129: /* --config-file */
641
544
free(argfile);
642
545
argfile = strdup(arg);
643
if(argfile != NULL){
644
errno = 0;
546
if(argfile == NULL){
547
perror("strdup");
645
548
}
646
549
break;
647
550
case 130: /* --userid */
648
551
case 131: /* --groupid */
649
552
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
651
case '?': /* --help */
652
case -3: /* --usage */
653
case 'V': /* --version */
654
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
655
555
break;
656
556
default:
657
557
return ARGP_ERR_UNKNOWN;
658
558
}
659
return errno;
559
return 0;
660
560
}
661
561
662
562
struct argp argp = { .options = options,
666
566
667
567
/* Parse using parse_opt_config_file() in order to get the custom
668
568
config file location, if any. */
669
ret = argp_parse(&argp, argc, argv,
670
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
671
NULL, NULL);
672
switch(ret){
673
case 0:
674
break;
675
case ENOMEM:
676
default:
677
errno = ret;
678
error(0, errno, "argp_parse");
679
exitstatus = EX_OSERR;
680
goto fallback;
681
case EINVAL:
682
exitstatus = EX_USAGE;
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;
683
573
goto fallback;
684
574
}
685
575
702
592
custom_argc = 1;
703
593
custom_argv = malloc(sizeof(char*) * 2);
704
594
if(custom_argv == NULL){
705
error(0, errno, "malloc");
706
exitstatus = EX_OSERR;
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
707
597
goto fallback;
708
598
}
709
599
custom_argv[0] = argv[0];
725
615
}
726
616
new_arg = strdup(p);
727
617
if(new_arg == NULL){
728
error(0, errno, "strdup");
729
exitstatus = EX_OSERR;
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
730
620
free(org_line);
731
621
goto fallback;
732
622
}
733
623
734
624
custom_argc += 1;
735
{
736
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
737
char **new_argv = reallocarray(custom_argv,
738
(size_t)custom_argc + 1,
739
sizeof(char *));
740
#else
741
char **new_argv = NULL;
742
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
743
/* overflow */
744
errno = ENOMEM;
745
} else {
746
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
747
* sizeof(char *));
748
}
749
#endif
750
if(new_argv == NULL){
751
error(0, errno, "reallocarray");
752
exitstatus = EX_OSERR;
753
free(new_arg);
754
free(org_line);
755
goto fallback;
756
} else {
757
custom_argv = new_argv;
758
}
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;
759
632
}
760
633
custom_argv[custom_argc-1] = new_arg;
761
634
custom_argv[custom_argc] = NULL;
765
638
ret = fclose(conffp);
766
639
} while(ret == EOF and errno == EINTR);
767
640
if(ret == EOF){
768
error(0, errno, "fclose");
769
exitstatus = EX_IOERR;
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
770
643
goto fallback;
771
644
}
772
645
free(org_line);
774
647
/* Check for harmful errors and go to fallback. Other errors might
775
648
not affect opening plugins */
776
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
777
error(0, errno, "fopen");
778
exitstatus = EX_OSERR;
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
779
652
goto fallback;
780
653
}
781
654
}
782
/* If there were any arguments from the configuration file, pass
783
them to parser as command line arguments */
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
784
657
if(custom_argv != NULL){
785
ret = argp_parse(&argp, custom_argc, custom_argv,
786
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
787
NULL, NULL);
788
switch(ret){
789
case 0:
790
break;
791
case ENOMEM:
792
default:
793
errno = ret;
794
error(0, errno, "argp_parse");
795
exitstatus = EX_OSERR;
796
goto fallback;
797
case EINVAL:
798
exitstatus = EX_CONFIG;
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;
799
663
goto fallback;
800
664
}
801
665
}
802
666
803
667
/* Parse actual command line arguments, to let them override the
804
668
config file */
805
ret = argp_parse(&argp, argc, argv,
806
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
807
NULL, NULL);
808
switch(ret){
809
case 0:
810
break;
811
case ENOMEM:
812
default:
813
errno = ret;
814
error(0, errno, "argp_parse");
815
exitstatus = EX_OSERR;
816
goto fallback;
817
case EINVAL:
818
exitstatus = EX_USAGE;
819
goto fallback;
820
}
821
822
{
823
char *pluginhelperenv;
824
bool bret = true;
825
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
826
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
827
if(ret != -1){
828
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
829
}
830
if(ret == -1 or not bret){
831
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
832
" environment variable to \"%s\" for all plugins\n",
833
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
834
}
835
if(ret != -1){
836
free(pluginhelperenv);
837
}
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;
838
674
}
839
675
840
676
if(debug){
841
for(plugin *p = plugin_list; p != NULL; p = p->next){
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
842
678
fprintf(stderr, "Plugin: %s has %d arguments\n",
843
679
p->name ? p->name : "Global", p->argc - 1);
844
680
for(char **a = p->argv; *a != NULL; a++){
851
687
}
852
688
}
853
689
854
if(getuid() == 0){
855
/* Work around Debian bug #633582:
856
<https://bugs.debian.org/633582> */
857
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
858
if(plugindir_fd == -1){
859
if(errno != ENOENT){
860
error(0, errno, "open(\"" PDIR "\")");
861
}
862
} else {
863
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
864
if(ret == -1){
865
error(0, errno, "fstat");
866
} else {
867
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
868
ret = fchown(plugindir_fd, uid, gid);
869
if(ret == -1){
870
error(0, errno, "fchown");
871
}
872
}
873
}
874
close(plugindir_fd);
875
}
876
877
/* Work around Debian bug #981302
878
<https://bugs.debian.org/981302> */
879
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
880
ret = symlink("/proc/self/fd", "/dev/fd");
881
if(ret == -1){
882
error(0, errno, "Failed to create /dev/fd symlink");
883
}
884
}
885
}
886
887
/* Lower permissions */
888
ret = setgid(gid);
690
/* Strip permissions down to nobody */
691
setgid(gid);
889
692
if(ret == -1){
890
error(0, errno, "setgid");
693
perror("setgid");
891
694
}
892
695
ret = setuid(uid);
893
696
if(ret == -1){
894
error(0, errno, "setuid");
895
}
896
897
/* Open plugin directory with close_on_exec flag */
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 */
898
713
{
899
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
900
#ifdef O_CLOEXEC
901
O_CLOEXEC
902
#else /* not O_CLOEXEC */
903
0
904
#endif /* not O_CLOEXEC */
905
);
906
if(dir_fd == -1){
907
error(0, errno, "Could not open plugin dir");
908
exitstatus = EX_UNAVAILABLE;
909
goto fallback;
910
}
911
912
#ifndef O_CLOEXEC
913
/* Set the FD_CLOEXEC flag on the directory */
914
ret = set_cloexec_flag(dir_fd);
915
if(ret < 0){
916
error(0, errno, "set_cloexec_flag");
917
exitstatus = EX_OSERR;
918
goto fallback;
919
}
920
#endif /* O_CLOEXEC */
921
}
922
923
int good_name(const struct dirent * const dirent){
924
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
925
"*.dpkg-old", "*.dpkg-bak",
926
"*.dpkg-divert", NULL };
927
#ifdef __GNUC__
928
#pragma GCC diagnostic push
929
#pragma GCC diagnostic ignored "-Wcast-qual"
930
#endif
931
for(const char **pat = (const char **)patterns;
932
*pat != NULL; pat++){
933
#ifdef __GNUC__
934
#pragma GCC diagnostic pop
935
#endif
936
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
937
!= FNM_NOMATCH){
938
if(debug){
939
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
940
" matching pattern %s\n", dirent->d_name, *pat);
941
}
942
return 0;
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;
943
721
}
944
722
}
945
return 1;
946
}
947
948
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
949
alphasort);
950
if(numplugins == -1){
951
error(0, errno, "Could not scan plugin dir");
952
direntries = NULL;
953
exitstatus = EX_OSERR;
954
goto fallback;
955
723
}
956
724
957
725
FD_ZERO(&rfds_all);
958
726
959
727
/* Read and execute any executable in the plugin directory*/
960
for(int i = 0; i < numplugins; i++){
961
962
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
963
if(plugin_fd == -1){
964
error(0, errno, "Could not open plugin");
965
free(direntries[i]);
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");
966
799
continue;
967
800
}
968
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
969
803
if(ret == -1){
970
error(0, errno, "stat");
971
close(plugin_fd);
972
free(direntries[i]);
804
perror("stat");
805
free(filename);
973
806
continue;
974
807
}
975
808
976
809
/* Ignore non-executable files */
977
810
if(not S_ISREG(st.st_mode)
978
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
979
X_OK, 0)) != 0)){
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
980
812
if(debug){
981
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
982
" with bad type or mode\n",
983
plugindir != NULL ? plugindir : PDIR,
984
direntries[i]->d_name);
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
985
815
}
986
close(plugin_fd);
987
free(direntries[i]);
816
free(filename);
988
817
continue;
989
818
}
990
819
991
plugin *p = getplugin(direntries[i]->d_name);
820
plugin *p = getplugin(dirst->d_name);
992
821
if(p == NULL){
993
error(0, errno, "getplugin");
994
close(plugin_fd);
995
free(direntries[i]);
822
perror("getplugin");
823
free(filename);
996
824
continue;
997
825
}
998
826
if(p->disabled){
999
827
if(debug){
1000
828
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
1001
direntries[i]->d_name);
829
dirst->d_name);
1002
830
}
1003
close(plugin_fd);
1004
free(direntries[i]);
831
free(filename);
1005
832
continue;
1006
833
}
1007
834
{
1010
837
if(g != NULL){
1011
838
for(char **a = g->argv + 1; *a != NULL; a++){
1012
839
if(not add_argument(p, *a)){
1013
error(0, errno, "add_argument");
840
perror("add_argument");
1014
841
}
1015
842
}
1016
843
/* Add global environment variables */
1017
844
for(char **e = g->environ; *e != NULL; e++){
1018
845
if(not add_environment(p, *e, false)){
1019
error(0, errno, "add_environment");
846
perror("add_environment");
1020
847
}
1021
848
}
1022
849
}
1023
850
}
1024
/* If this plugin has any environment variables, we need to
1025
duplicate the environment from this process, too. */
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. */
1026
854
if(p->environ[0] != NULL){
1027
855
for(char **e = environ; *e != NULL; e++){
1028
856
if(not add_environment(p, *e, false)){
1029
error(0, errno, "add_environment");
857
perror("add_environment");
1030
858
}
1031
859
}
1032
860
}
1033
861
1034
862
int pipefd[2];
1035
#ifndef O_CLOEXEC
1036
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1037
#else /* O_CLOEXEC */
1038
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1039
#endif /* O_CLOEXEC */
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
1040
864
if(ret == -1){
1041
error(0, errno, "pipe");
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
1044
goto fallback;
1045
}
1046
if(pipefd[0] >= FD_SETSIZE){
1047
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1048
FD_SETSIZE);
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
1053
goto fallback;
1054
}
1055
#ifndef O_CLOEXEC
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
1056
869
/* Ask OS to automatic close the pipe on exec */
1057
870
ret = set_cloexec_flag(pipefd[0]);
1058
871
if(ret < 0){
1059
error(0, errno, "set_cloexec_flag");
1060
close(pipefd[0]);
1061
close(pipefd[1]);
1062
exitstatus = EX_OSERR;
1063
free(direntries[i]);
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1064
874
goto fallback;
1065
875
}
1066
876
ret = set_cloexec_flag(pipefd[1]);
1067
877
if(ret < 0){
1068
error(0, errno, "set_cloexec_flag");
1069
close(pipefd[0]);
1070
close(pipefd[1]);
1071
exitstatus = EX_OSERR;
1072
free(direntries[i]);
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1073
880
goto fallback;
1074
881
}
1075
#endif /* not O_CLOEXEC */
1076
882
/* Block SIGCHLD until process is safely in process list */
1077
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1078
&sigchld_action.sa_mask,
1079
NULL));
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1080
886
if(ret < 0){
1081
error(0, errno, "sigprocmask");
1082
exitstatus = EX_OSERR;
1083
free(direntries[i]);
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1084
889
goto fallback;
1085
890
}
1086
891
/* Starting a new process to be watched */
1089
894
pid = fork();
1090
895
} while(pid == -1 and errno == EINTR);
1091
896
if(pid == -1){
1092
error(0, errno, "fork");
1093
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1094
&sigchld_action.sa_mask, NULL));
1095
close(pipefd[0]);
1096
close(pipefd[1]);
1097
exitstatus = EX_OSERR;
1098
free(direntries[i]);
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1099
899
goto fallback;
1100
900
}
1101
901
if(pid == 0){
1102
902
/* this is the child process */
1103
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1104
904
if(ret < 0){
1105
error(0, errno, "sigaction");
1106
_exit(EX_OSERR);
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1107
907
}
1108
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1109
909
if(ret < 0){
1110
error(0, errno, "sigprocmask");
1111
_exit(EX_OSERR);
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1112
912
}
1113
913
1114
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1115
915
if(ret == -1){
1116
error(0, errno, "dup2");
1117
_exit(EX_OSERR);
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1118
918
}
1119
919
1120
if(fexecve(plugin_fd, p->argv,
1121
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1122
error(0, errno, "fexecve for %s/%s",
1123
plugindir != NULL ? plugindir : PDIR,
1124
direntries[i]->d_name);
1125
_exit(EX_OSERR);
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
}
1126
935
}
1127
936
/* no return */
1128
937
}
1129
938
/* Parent process */
1130
close(pipefd[1]); /* Close unused write end of pipe */
1131
close(plugin_fd);
1132
plugin *new_plugin = getplugin(direntries[i]->d_name);
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);
1133
943
if(new_plugin == NULL){
1134
error(0, errno, "getplugin");
1135
ret = (int)(TEMP_FAILURE_RETRY
1136
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1137
NULL)));
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1138
948
if(ret < 0){
1139
error(0, errno, "sigprocmask");
949
perror("sigprocmask");
1140
950
}
1141
exitstatus = EX_OSERR;
1142
free(direntries[i]);
951
exitstatus = EXIT_FAILURE;
1143
952
goto fallback;
1144
953
}
1145
free(direntries[i]);
1146
954
1147
955
new_plugin->pid = pid;
1148
956
new_plugin->fd = pipefd[0];
1149
1150
if(debug){
1151
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1152
new_plugin->name, (intmax_t) (new_plugin->pid));
1153
}
1154
957
1155
958
/* Unblock SIGCHLD so signal handler can be run if this process
1156
959
has already completed */
1157
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1158
&sigchld_action.sa_mask,
1159
NULL));
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1160
963
if(ret < 0){
1161
error(0, errno, "sigprocmask");
1162
exitstatus = EX_OSERR;
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1163
966
goto fallback;
1164
967
}
1165
968
1170
973
}
1171
974
}
1172
975
1173
free(direntries);
1174
direntries = NULL;
1175
close(dir_fd);
1176
dir_fd = -1;
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1177
978
free_plugin(getplugin(NULL));
1178
979
1179
980
for(plugin *p = plugin_list; p != NULL; p = p->next){
1192
993
fd_set rfds = rfds_all;
1193
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1194
995
if(select_ret == -1 and errno != EINTR){
1195
error(0, errno, "select");
1196
exitstatus = EX_OSERR;
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1197
998
goto fallback;
1198
999
}
1199
1000
/* OK, now either a process completed, or something can be read
1218
1019
(intmax_t) (proc->pid),
1219
1020
WTERMSIG(proc->status),
1220
1021
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));
1221
1025
}
1222
1026
}
1223
1027
1225
1029
FD_CLR(proc->fd, &rfds_all);
1226
1030
1227
1031
/* Block signal while modifying process_list */
1228
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1229
(SIG_BLOCK,
1230
&sigchld_action.sa_mask,
1231
NULL));
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1232
1035
if(ret < 0){
1233
error(0, errno, "sigprocmask");
1234
exitstatus = EX_OSERR;
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1235
1038
goto fallback;
1236
1039
}
1237
1040
1240
1043
proc = next_plugin;
1241
1044
1242
1045
/* We are done modifying process list, so unblock signal */
1243
ret = (int)(TEMP_FAILURE_RETRY
1244
(sigprocmask(SIG_UNBLOCK,
1245
&sigchld_action.sa_mask, NULL)));
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1246
1049
if(ret < 0){
1247
error(0, errno, "sigprocmask");
1248
exitstatus = EX_OSERR;
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1249
1052
goto fallback;
1250
1053
}
1251
1054
1261
1064
bool bret = print_out_password(proc->buffer,
1262
1065
proc->buffer_length);
1263
1066
if(not bret){
1264
error(0, errno, "print_out_password");
1265
exitstatus = EX_IOERR;
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1266
1069
}
1267
1070
goto fallback;
1268
1071
}
1275
1078
}
1276
1079
/* Before reading, make the process' data buffer large enough */
1277
1080
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1278
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1279
+ (size_t) BUFFER_SIZE);
1280
if(new_buffer == NULL){
1281
error(0, errno, "malloc");
1282
exitstatus = EX_OSERR;
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;
1283
1086
goto fallback;
1284
1087
}
1285
proc->buffer = new_buffer;
1286
1088
proc->buffer_size += BUFFER_SIZE;
1287
1089
}
1288
1090
/* Read from the process */
1307
1109
1308
1110
fallback:
1309
1111
1310
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1311
and exitstatus != EX_OK)){
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1312
1113
/* Fallback if all plugins failed, none are found or an error
1313
1114
occured */
1314
1115
bool bret;
1322
1123
}
1323
1124
bret = print_out_password(passwordbuffer, len);
1324
1125
if(not bret){
1325
error(0, errno, "print_out_password");
1326
exitstatus = EX_IOERR;
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1327
1128
}
1328
1129
}
1329
1130
1330
1131
/* Restore old signal handler */
1331
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1332
1133
if(ret == -1){
1333
error(0, errno, "sigaction");
1334
exitstatus = EX_OSERR;
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1335
1136
}
1336
1137
1337
1138
if(custom_argv != NULL){
1341
1142
free(custom_argv);
1342
1143
}
1343
1144
1344
free(direntries);
1345
1346
if(dir_fd != -1){
1347
close(dir_fd);
1145
if(dir != NULL){
1146
closedir(dir);
1348
1147
}
1349
1148
1350
1149
/* Kill the processes */
1354
1153
ret = kill(p->pid, SIGTERM);
1355
1154
if(ret == -1 and errno != ESRCH){
1356
1155
/* Set-uid proccesses might not get closed */
1357
error(0, errno, "kill");
1156
perror("kill");
1358
1157
}
1359
1158
}
1360
1159
}
1364
1163
ret = wait(NULL);
1365
1164
} while(ret >= 0);
1366
1165
if(errno != ECHILD){
1367
error(0, errno, "wait");
1166
perror("wait");
1368
1167
}
1369
1168
1370
1169
free_plugin_list();
1371
1170
1372
1171
free(plugindir);
1373
free(pluginhelperdir);
1374
1172
free(argfile);
1375
1173
1376
1174
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0