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- Committer: Teddy Hogeborn
- Date: 2024-09-09 04:24:39 UTC
- Revision ID: teddy@recompile.se-20240909042439-j85mr20uli2hnyis
Eliminate compiler warnings
Many programs use nested functions, which now result in a linker
warning about executable stack. Hide this warning. Also, rewrite a
loop in the plymouth plugin to avoid warning about signed overflow.
This change also makes the plugin pick the alphabetically first
process entry instead of the last, in case many plymouth processes are
found (which should be unlikely).
* Makefile (plugin-runner, dracut-module/password-agent,
plugins.d/password-prompt, plugins.d/mandos-client,
plugins.d/plymouth): New target; set LDFLAGS to add "-Xlinker
--no-warn-execstack".
* plugins.d/plymouth.c (get_pid): When no pid files are found, and we
are looking through the process list, go though it from the start
instead of from the end, i.e. in normal alphabetical order and not
in reverse order.
Many programs use nested functions, which now result in a linker
warning about executable stack. Hide this warning. Also, rewrite a
loop in the plymouth plugin to avoid warning about signed overflow.
This change also makes the plugin pick the alphabetically first
process entry instead of the last, in case many plymouth processes are
found (which should be unlikely).
* Makefile (plugin-runner, dracut-module/password-agent,
plugins.d/password-prompt, plugins.d/mandos-client,
plugins.d/plymouth): New target; set LDFLAGS to add "-Xlinker
--no-warn-execstack".
* plugins.d/plymouth.c (get_pid): When no pid files are found, and we
are looking through the process list, go though it from the start
instead of from the end, i.e. in normal alphabetical order and not
in reverse order.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2022 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
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
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
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() */
27
42
#include <stddef.h> /* size_t, NULL */
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() */
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() */
54
63
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
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() */
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 */
71
89
72
90
#define BUFFER_SIZE 256
73
91
74
92
#define PDIR "/lib/mandos/plugins.d"
93
#define PHDIR "/lib/mandos/plugin-helpers"
75
94
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
95
77
96
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
97
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
98
80
99
typedef struct plugin{
81
100
char *name; /* can be NULL or any plugin name */
101
120
102
121
/* Gets an existing plugin based on name,
103
122
or if none is found, creates a new one */
123
__attribute__((warn_unused_result))
104
124
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
125
/* Check for existing plugin with that name */
106
126
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
127
if((p->name == name)
108
128
or (p->name and name and (strcmp(p->name, name) == 0))){
123
143
copy_name = strdup(name);
124
144
} while(copy_name == NULL and errno == EINTR);
125
145
if(copy_name == NULL){
146
int e = errno;
126
147
free(new_plugin);
148
errno = e;
127
149
return NULL;
128
150
}
129
151
}
137
159
new_plugin->argv = malloc(sizeof(char *) * 2);
138
160
} while(new_plugin->argv == NULL and errno == EINTR);
139
161
if(new_plugin->argv == NULL){
162
int e = errno;
140
163
free(copy_name);
141
164
free(new_plugin);
165
errno = e;
142
166
return NULL;
143
167
}
144
168
new_plugin->argv[0] = copy_name;
148
172
new_plugin->environ = malloc(sizeof(char *));
149
173
} while(new_plugin->environ == NULL and errno == EINTR);
150
174
if(new_plugin->environ == NULL){
175
int e = errno;
151
176
free(copy_name);
152
177
free(new_plugin->argv);
153
178
free(new_plugin);
179
errno = e;
154
180
return NULL;
155
181
}
156
182
new_plugin->environ[0] = NULL;
161
187
}
162
188
163
189
/* Helper function for add_argument and add_environment */
190
__attribute__((nonnull, warn_unused_result))
164
191
static bool add_to_char_array(const char *new, char ***array,
165
192
int *len){
166
193
/* Resize the pointed-to array to hold one more pointer */
194
char **new_array = NULL;
167
195
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
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);
171
210
/* Malloc check */
172
if(*array == NULL){
211
if(new_array == NULL){
173
212
return false;
174
213
}
214
*array = new_array;
175
215
/* Make a copy of the new string */
176
216
char *copy;
177
217
do {
189
229
}
190
230
191
231
/* Add to a plugin's argument vector */
232
__attribute__((nonnull(2), warn_unused_result))
192
233
static bool add_argument(plugin *p, const char *arg){
193
234
if(p == NULL){
194
235
return false;
197
238
}
198
239
199
240
/* Add to a plugin's environment */
241
__attribute__((nonnull(2), warn_unused_result))
200
242
static bool add_environment(plugin *p, const char *def, bool replace){
201
243
if(p == NULL){
202
244
return false;
204
246
/* namelen = length of name of environment variable */
205
247
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
248
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
249
for(char **envdef = p->environ; *envdef != NULL; envdef++){
250
if(strncmp(*envdef, def, namelen + 1) == 0){
209
251
/* It already exists */
210
252
if(replace){
211
char *new;
253
char *new_envdef;
212
254
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
255
new_envdef = realloc(*envdef, strlen(def) + 1);
256
} while(new_envdef == NULL and errno == EINTR);
257
if(new_envdef == NULL){
216
258
return false;
217
259
}
218
*e = new;
219
strcpy(*e, def);
260
*envdef = new_envdef;
261
strcpy(*envdef, def);
220
262
}
221
263
return true;
222
264
}
224
266
return add_to_char_array(def, &(p->environ), &(p->envc));
225
267
}
226
268
269
#ifndef O_CLOEXEC
227
270
/*
228
271
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
272
* Descriptor Flags".
230
273
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
231
274
*/
275
__attribute__((warn_unused_result))
232
276
static int set_cloexec_flag(int fd){
233
277
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
234
278
/* If reading the flags failed, return error indication now. */
239
283
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
284
ret | FD_CLOEXEC));
241
285
}
286
#endif /* not O_CLOEXEC */
242
287
243
288
244
289
/* Mark processes as completed when they exit, and save their exit
258
303
/* No child processes */
259
304
break;
260
305
}
261
perror("waitpid");
306
error(0, errno, "waitpid");
262
307
}
263
308
264
309
/* A child exited, find it in process_list */
276
321
}
277
322
278
323
/* Prints out a password to stdout */
324
__attribute__((nonnull, warn_unused_result))
279
325
static bool print_out_password(const char *buffer, size_t length){
280
326
ssize_t ret;
281
327
for(size_t written = 0; written < length; written += (size_t)ret){
289
335
}
290
336
291
337
/* Removes and free a plugin from the plugin list */
338
__attribute__((nonnull))
292
339
static void free_plugin(plugin *plugin_node){
293
340
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
295
342
free(*arg);
296
343
}
344
free(plugin_node->name);
297
345
free(plugin_node->argv);
298
346
for(char **env = plugin_node->environ; *env != NULL; env++){
299
347
free(*env);
326
374
327
375
int main(int argc, char *argv[]){
328
376
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
329
378
char *argfile = NULL;
330
379
FILE *conffp;
331
size_t d_name_len;
332
DIR *dir = NULL;
333
struct dirent *dirst;
380
struct dirent **direntries = NULL;
334
381
struct stat st;
335
382
fd_set rfds_all;
336
383
int ret, maxfd = 0;
344
391
.sa_flags = SA_NOCLDSTOP };
345
392
char **custom_argv = NULL;
346
393
int custom_argc = 0;
394
int dir_fd = -1;
347
395
348
396
/* Establish a signal handler */
349
397
sigemptyset(&sigchld_action.sa_mask);
350
398
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
351
399
if(ret == -1){
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
400
error(0, errno, "sigaddset");
401
exitstatus = EX_OSERR;
354
402
goto fallback;
355
403
}
356
404
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
357
405
if(ret == -1){
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
406
error(0, errno, "sigaction");
407
exitstatus = EX_OSERR;
360
408
goto fallback;
361
409
}
362
410
394
442
.doc = "Group ID the plugins will run as", .group = 3 },
395
443
{ .name = "debug", .key = 132,
396
444
.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 },
397
458
{ .name = NULL }
398
459
};
399
460
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
461
__attribute__((nonnull(3)))
462
error_t parse_opt(int key, char *arg, struct argp_state *state){
463
errno = 0;
402
464
switch(key){
403
465
char *tmp;
404
intmax_t tmpmax;
466
intmax_t tmp_id;
405
467
case 'g': /* --global-options */
406
if(arg != NULL){
468
{
407
469
char *plugin_option;
408
470
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
412
471
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
472
break;
415
473
}
416
474
}
475
errno = 0;
417
476
}
418
477
break;
419
478
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
479
if(add_environment(getplugin(NULL), arg, true)){
480
errno = 0;
425
481
}
426
482
break;
427
483
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
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;
438
502
}
439
503
}
504
errno = 0;
440
505
}
441
506
break;
442
507
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
508
{
447
509
char *envdef = strchr(arg, ':');
448
510
if(envdef == NULL){
511
argp_error(state, "No colon in \"%s\"", arg);
512
errno = EINVAL;
449
513
break;
450
514
}
451
515
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
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;
454
524
}
455
525
}
456
526
break;
457
527
case 'd': /* --disable */
458
if(arg != NULL){
528
{
459
529
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
530
if(p != NULL){
531
p->disabled = true;
532
errno = 0;
462
533
}
463
p->disabled = true;
464
534
}
465
535
break;
466
536
case 'e': /* --enable */
467
if(arg != NULL){
537
{
468
538
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
539
if(p != NULL){
540
p->disabled = false;
541
errno = 0;
471
542
}
472
p->disabled = false;
473
543
}
474
544
break;
475
545
case 128: /* --plugin-dir */
476
546
free(plugindir);
477
547
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
548
if(plugindir != NULL){
549
errno = 0;
480
550
}
481
551
break;
482
552
case 129: /* --config-file */
483
553
/* This is already done by parse_opt_config_file() */
484
554
break;
485
555
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
556
tmp_id = strtoimax(arg, &tmp, 10);
488
557
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
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;
494
562
}
563
uid = (uid_t)tmp_id;
564
errno = 0;
495
565
break;
496
566
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
567
tmp_id = strtoimax(arg, &tmp, 10);
499
568
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
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;
505
573
}
574
gid = (gid_t)tmp_id;
575
errno = 0;
506
576
break;
507
577
case 132: /* --debug */
508
578
debug = true;
509
579
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;
510
603
/*
511
604
* When adding more options before this line, remember to also add a
512
605
* "case" to the "parse_opt_config_file" function below.
515
608
/* Cryptsetup always passes an argument, which is an empty
516
609
string if "none" was specified in /etc/crypttab. So if
517
610
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
611
if(arg[0] == '\0'){
612
break;
520
613
}
521
break;
522
case ARGP_KEY_END:
523
break;
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
524
619
default:
525
620
return ARGP_ERR_UNKNOWN;
526
621
}
527
return 0;
622
return errno; /* Set to 0 at start */
528
623
}
529
624
530
625
/* This option parser is the same as parse_opt() above, except it
532
627
error_t parse_opt_config_file(int key, char *arg,
533
628
__attribute__((unused))
534
629
struct argp_state *state){
630
errno = 0;
535
631
switch(key){
536
632
case 'g': /* --global-options */
537
633
case 'G': /* --global-env */
544
640
case 129: /* --config-file */
545
641
free(argfile);
546
642
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
643
if(argfile != NULL){
644
errno = 0;
549
645
}
550
646
break;
551
647
case 130: /* --userid */
552
648
case 131: /* --groupid */
553
649
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
651
case '?': /* --help */
652
case -3: /* --usage */
653
case 'V': /* --version */
554
654
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
655
break;
557
656
default:
558
657
return ARGP_ERR_UNKNOWN;
559
658
}
560
return 0;
659
return errno;
561
660
}
562
661
563
662
struct argp argp = { .options = options,
567
666
568
667
/* Parse using parse_opt_config_file() in order to get the custom
569
668
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
572
fprintf(stderr, "Unknown error while parsing arguments\n");
573
exitstatus = EXIT_FAILURE;
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;
574
683
goto fallback;
575
684
}
576
685
593
702
custom_argc = 1;
594
703
custom_argv = malloc(sizeof(char*) * 2);
595
704
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
705
error(0, errno, "malloc");
706
exitstatus = EX_OSERR;
598
707
goto fallback;
599
708
}
600
709
custom_argv[0] = argv[0];
616
725
}
617
726
new_arg = strdup(p);
618
727
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
728
error(0, errno, "strdup");
729
exitstatus = EX_OSERR;
621
730
free(org_line);
622
731
goto fallback;
623
732
}
624
733
625
734
custom_argc += 1;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
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
}
633
759
}
634
760
custom_argv[custom_argc-1] = new_arg;
635
761
custom_argv[custom_argc] = NULL;
639
765
ret = fclose(conffp);
640
766
} while(ret == EOF and errno == EINTR);
641
767
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
768
error(0, errno, "fclose");
769
exitstatus = EX_IOERR;
644
770
goto fallback;
645
771
}
646
772
free(org_line);
648
774
/* Check for harmful errors and go to fallback. Other errors might
649
775
not affect opening plugins */
650
776
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
777
error(0, errno, "fopen");
778
exitstatus = EX_OSERR;
653
779
goto fallback;
654
780
}
655
781
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
782
/* If there were any arguments from the configuration file, pass
783
them to parser as command line arguments */
658
784
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
662
fprintf(stderr, "Unknown error while parsing arguments\n");
663
exitstatus = EXIT_FAILURE;
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;
664
799
goto fallback;
665
800
}
666
801
}
667
802
668
803
/* Parse actual command line arguments, to let them override the
669
804
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
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
}
675
838
}
676
839
677
840
if(debug){
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
841
for(plugin *p = plugin_list; p != NULL; p = p->next){
679
842
fprintf(stderr, "Plugin: %s has %d arguments\n",
680
843
p->name ? p->name : "Global", p->argc - 1);
681
844
for(char **a = p->argv; *a != NULL; a++){
688
851
}
689
852
}
690
853
691
/* Strip permissions down to nobody */
692
setgid(gid);
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);
693
889
if(ret == -1){
694
perror("setgid");
890
error(0, errno, "setgid");
695
891
}
696
892
ret = setuid(uid);
697
893
if(ret == -1){
698
perror("setuid");
699
}
700
701
if(plugindir == NULL){
702
dir = opendir(PDIR);
703
} else {
704
dir = opendir(plugindir);
705
}
706
707
if(dir == NULL){
708
perror("Could not open plugin dir");
709
exitstatus = EXIT_FAILURE;
710
goto fallback;
711
}
712
713
/* Set the FD_CLOEXEC flag on the directory, if possible */
894
error(0, errno, "setuid");
895
}
896
897
/* Open plugin directory with close_on_exec flag */
714
898
{
715
int dir_fd = dirfd(dir);
716
if(dir_fd >= 0){
717
ret = set_cloexec_flag(dir_fd);
718
if(ret < 0){
719
perror("set_cloexec_flag");
720
exitstatus = EXIT_FAILURE;
721
goto fallback;
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;
722
943
}
723
944
}
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;
724
955
}
725
956
726
957
FD_ZERO(&rfds_all);
727
958
728
959
/* Read and execute any executable in the plugin directory*/
729
while(true){
730
do {
731
dirst = readdir(dir);
732
} while(dirst == NULL and errno == EINTR);
733
734
/* All directory entries have been processed */
735
if(dirst == NULL){
736
if(errno == EBADF){
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
739
goto fallback;
740
}
741
break;
742
}
743
744
d_name_len = strlen(dirst->d_name);
745
746
/* Ignore dotfiles, backup files and other junk */
747
{
748
bool bad_name = false;
749
750
const char const *bad_prefixes[] = { ".", "#", NULL };
751
752
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
753
".dpkg-old",
754
".dpkg-bak",
755
".dpkg-divert", NULL };
756
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
757
size_t pre_len = strlen(*pre);
758
if((d_name_len >= pre_len)
759
and strncmp((dirst->d_name), *pre, pre_len) == 0){
760
if(debug){
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
" with bad prefix %s\n", dirst->d_name, *pre);
763
}
764
bad_name = true;
765
break;
766
}
767
}
768
if(bad_name){
769
continue;
770
}
771
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
772
size_t suf_len = strlen(*suf);
773
if((d_name_len >= suf_len)
774
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
775
== 0)){
776
if(debug){
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
778
" with bad suffix %s\n", dirst->d_name, *suf);
779
}
780
bad_name = true;
781
break;
782
}
783
}
784
785
if(bad_name){
786
continue;
787
}
788
}
789
790
char *filename;
791
if(plugindir == NULL){
792
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
793
dirst->d_name));
794
} else {
795
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
796
plugindir,
797
dirst->d_name));
798
}
799
if(ret < 0){
800
perror("asprintf");
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]);
801
966
continue;
802
967
}
803
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
968
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
805
969
if(ret == -1){
806
perror("stat");
807
free(filename);
970
error(0, errno, "stat");
971
close(plugin_fd);
972
free(direntries[i]);
808
973
continue;
809
974
}
810
975
811
976
/* Ignore non-executable files */
812
977
if(not S_ISREG(st.st_mode)
813
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
978
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
979
X_OK, 0)) != 0)){
814
980
if(debug){
815
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
816
" with bad type or mode\n", filename);
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);
817
985
}
818
free(filename);
986
close(plugin_fd);
987
free(direntries[i]);
819
988
continue;
820
989
}
821
990
822
plugin *p = getplugin(dirst->d_name);
991
plugin *p = getplugin(direntries[i]->d_name);
823
992
if(p == NULL){
824
perror("getplugin");
825
free(filename);
993
error(0, errno, "getplugin");
994
close(plugin_fd);
995
free(direntries[i]);
826
996
continue;
827
997
}
828
998
if(p->disabled){
829
999
if(debug){
830
1000
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
831
dirst->d_name);
1001
direntries[i]->d_name);
832
1002
}
833
free(filename);
1003
close(plugin_fd);
1004
free(direntries[i]);
834
1005
continue;
835
1006
}
836
1007
{
839
1010
if(g != NULL){
840
1011
for(char **a = g->argv + 1; *a != NULL; a++){
841
1012
if(not add_argument(p, *a)){
842
perror("add_argument");
1013
error(0, errno, "add_argument");
843
1014
}
844
1015
}
845
1016
/* Add global environment variables */
846
1017
for(char **e = g->environ; *e != NULL; e++){
847
1018
if(not add_environment(p, *e, false)){
848
perror("add_environment");
1019
error(0, errno, "add_environment");
849
1020
}
850
1021
}
851
1022
}
852
1023
}
853
/* If this plugin has any environment variables, we will call
854
using execve and need to duplicate the environment from this
855
process, too. */
1024
/* If this plugin has any environment variables, we need to
1025
duplicate the environment from this process, too. */
856
1026
if(p->environ[0] != NULL){
857
1027
for(char **e = environ; *e != NULL; e++){
858
1028
if(not add_environment(p, *e, false)){
859
perror("add_environment");
1029
error(0, errno, "add_environment");
860
1030
}
861
1031
}
862
1032
}
863
1033
864
1034
int pipefd[2];
1035
#ifndef O_CLOEXEC
865
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 */
866
1040
if(ret == -1){
867
perror("pipe");
868
exitstatus = EXIT_FAILURE;
869
goto fallback;
870
}
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
871
1056
/* Ask OS to automatic close the pipe on exec */
872
1057
ret = set_cloexec_flag(pipefd[0]);
873
1058
if(ret < 0){
874
perror("set_cloexec_flag");
875
exitstatus = EXIT_FAILURE;
1059
error(0, errno, "set_cloexec_flag");
1060
close(pipefd[0]);
1061
close(pipefd[1]);
1062
exitstatus = EX_OSERR;
1063
free(direntries[i]);
876
1064
goto fallback;
877
1065
}
878
1066
ret = set_cloexec_flag(pipefd[1]);
879
1067
if(ret < 0){
880
perror("set_cloexec_flag");
881
exitstatus = EXIT_FAILURE;
1068
error(0, errno, "set_cloexec_flag");
1069
close(pipefd[0]);
1070
close(pipefd[1]);
1071
exitstatus = EX_OSERR;
1072
free(direntries[i]);
882
1073
goto fallback;
883
1074
}
1075
#endif /* not O_CLOEXEC */
884
1076
/* Block SIGCHLD until process is safely in process list */
885
1077
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
886
1078
&sigchld_action.sa_mask,
887
1079
NULL));
888
1080
if(ret < 0){
889
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
1081
error(0, errno, "sigprocmask");
1082
exitstatus = EX_OSERR;
1083
free(direntries[i]);
891
1084
goto fallback;
892
1085
}
893
1086
/* Starting a new process to be watched */
896
1089
pid = fork();
897
1090
} while(pid == -1 and errno == EINTR);
898
1091
if(pid == -1){
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
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]);
901
1099
goto fallback;
902
1100
}
903
1101
if(pid == 0){
904
1102
/* this is the child process */
905
1103
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
906
1104
if(ret < 0){
907
perror("sigaction");
908
_exit(EXIT_FAILURE);
1105
error(0, errno, "sigaction");
1106
_exit(EX_OSERR);
909
1107
}
910
1108
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
911
1109
if(ret < 0){
912
perror("sigprocmask");
913
_exit(EXIT_FAILURE);
1110
error(0, errno, "sigprocmask");
1111
_exit(EX_OSERR);
914
1112
}
915
1113
916
1114
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
917
1115
if(ret == -1){
918
perror("dup2");
919
_exit(EXIT_FAILURE);
1116
error(0, errno, "dup2");
1117
_exit(EX_OSERR);
920
1118
}
921
1119
922
if(dirfd(dir) < 0){
923
/* If dir has no file descriptor, we could not set FD_CLOEXEC
924
above and must now close it manually here. */
925
closedir(dir);
926
}
927
if(p->environ[0] == NULL){
928
if(execv(filename, p->argv) < 0){
929
perror("execv");
930
_exit(EXIT_FAILURE);
931
}
932
} else {
933
if(execve(filename, p->argv, p->environ) < 0){
934
perror("execve");
935
_exit(EXIT_FAILURE);
936
}
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);
937
1126
}
938
1127
/* no return */
939
1128
}
940
1129
/* Parent process */
941
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
942
pipe */
943
free(filename);
944
plugin *new_plugin = getplugin(dirst->d_name);
1130
close(pipefd[1]); /* Close unused write end of pipe */
1131
close(plugin_fd);
1132
plugin *new_plugin = getplugin(direntries[i]->d_name);
945
1133
if(new_plugin == NULL){
946
perror("getplugin");
1134
error(0, errno, "getplugin");
947
1135
ret = (int)(TEMP_FAILURE_RETRY
948
1136
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
1137
NULL)));
950
1138
if(ret < 0){
951
perror("sigprocmask");
1139
error(0, errno, "sigprocmask");
952
1140
}
953
exitstatus = EXIT_FAILURE;
1141
exitstatus = EX_OSERR;
1142
free(direntries[i]);
954
1143
goto fallback;
955
1144
}
1145
free(direntries[i]);
956
1146
957
1147
new_plugin->pid = pid;
958
1148
new_plugin->fd = pipefd[0];
959
1149
1150
if(debug){
1151
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1152
new_plugin->name, (intmax_t) (new_plugin->pid));
1153
}
1154
960
1155
/* Unblock SIGCHLD so signal handler can be run if this process
961
1156
has already completed */
962
1157
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
963
1158
&sigchld_action.sa_mask,
964
1159
NULL));
965
1160
if(ret < 0){
966
perror("sigprocmask");
967
exitstatus = EXIT_FAILURE;
1161
error(0, errno, "sigprocmask");
1162
exitstatus = EX_OSERR;
968
1163
goto fallback;
969
1164
}
970
1165
975
1170
}
976
1171
}
977
1172
978
TEMP_FAILURE_RETRY(closedir(dir));
979
dir = NULL;
1173
free(direntries);
1174
direntries = NULL;
1175
close(dir_fd);
1176
dir_fd = -1;
980
1177
free_plugin(getplugin(NULL));
981
1178
982
1179
for(plugin *p = plugin_list; p != NULL; p = p->next){
995
1192
fd_set rfds = rfds_all;
996
1193
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
997
1194
if(select_ret == -1 and errno != EINTR){
998
perror("select");
999
exitstatus = EXIT_FAILURE;
1195
error(0, errno, "select");
1196
exitstatus = EX_OSERR;
1000
1197
goto fallback;
1001
1198
}
1002
1199
/* OK, now either a process completed, or something can be read
1021
1218
(intmax_t) (proc->pid),
1022
1219
WTERMSIG(proc->status),
1023
1220
strsignal(WTERMSIG(proc->status)));
1024
} else if(WCOREDUMP(proc->status)){
1025
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1026
" core\n", proc->name, (intmax_t) (proc->pid));
1027
1221
}
1028
1222
}
1029
1223
1036
1230
&sigchld_action.sa_mask,
1037
1231
NULL));
1038
1232
if(ret < 0){
1039
perror("sigprocmask");
1040
exitstatus = EXIT_FAILURE;
1233
error(0, errno, "sigprocmask");
1234
exitstatus = EX_OSERR;
1041
1235
goto fallback;
1042
1236
}
1043
1237
1050
1244
(sigprocmask(SIG_UNBLOCK,
1051
1245
&sigchld_action.sa_mask, NULL)));
1052
1246
if(ret < 0){
1053
perror("sigprocmask");
1054
exitstatus = EXIT_FAILURE;
1247
error(0, errno, "sigprocmask");
1248
exitstatus = EX_OSERR;
1055
1249
goto fallback;
1056
1250
}
1057
1251
1067
1261
bool bret = print_out_password(proc->buffer,
1068
1262
proc->buffer_length);
1069
1263
if(not bret){
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
1264
error(0, errno, "print_out_password");
1265
exitstatus = EX_IOERR;
1072
1266
}
1073
1267
goto fallback;
1074
1268
}
1081
1275
}
1082
1276
/* Before reading, make the process' data buffer large enough */
1083
1277
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1084
proc->buffer = realloc(proc->buffer, proc->buffer_size
1085
+ (size_t) BUFFER_SIZE);
1086
if(proc->buffer == NULL){
1087
perror("malloc");
1088
exitstatus = EXIT_FAILURE;
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;
1089
1283
goto fallback;
1090
1284
}
1285
proc->buffer = new_buffer;
1091
1286
proc->buffer_size += BUFFER_SIZE;
1092
1287
}
1093
1288
/* Read from the process */
1112
1307
1113
1308
fallback:
1114
1309
1115
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1310
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1311
and exitstatus != EX_OK)){
1116
1312
/* Fallback if all plugins failed, none are found or an error
1117
1313
occured */
1118
1314
bool bret;
1126
1322
}
1127
1323
bret = print_out_password(passwordbuffer, len);
1128
1324
if(not bret){
1129
perror("print_out_password");
1130
exitstatus = EXIT_FAILURE;
1325
error(0, errno, "print_out_password");
1326
exitstatus = EX_IOERR;
1131
1327
}
1132
1328
}
1133
1329
1134
1330
/* Restore old signal handler */
1135
1331
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1136
1332
if(ret == -1){
1137
perror("sigaction");
1138
exitstatus = EXIT_FAILURE;
1333
error(0, errno, "sigaction");
1334
exitstatus = EX_OSERR;
1139
1335
}
1140
1336
1141
1337
if(custom_argv != NULL){
1145
1341
free(custom_argv);
1146
1342
}
1147
1343
1148
if(dir != NULL){
1149
closedir(dir);
1344
free(direntries);
1345
1346
if(dir_fd != -1){
1347
close(dir_fd);
1150
1348
}
1151
1349
1152
1350
/* Kill the processes */
1156
1354
ret = kill(p->pid, SIGTERM);
1157
1355
if(ret == -1 and errno != ESRCH){
1158
1356
/* Set-uid proccesses might not get closed */
1159
perror("kill");
1357
error(0, errno, "kill");
1160
1358
}
1161
1359
}
1162
1360
}
1166
1364
ret = wait(NULL);
1167
1365
} while(ret >= 0);
1168
1366
if(errno != ECHILD){
1169
perror("wait");
1367
error(0, errno, "wait");
1170
1368
}
1171
1369
1172
1370
free_plugin_list();
1173
1371
1174
1372
free(plugindir);
1373
free(pluginhelperdir);
1175
1374
free(argfile);
1176
1375
1177
1376
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0