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- Committer: Teddy Hogeborn
- Date: 2009-09-23 08:52:09 UTC
- Revision ID: teddy@fukt.bsnet.se-20090923085209-n6nx3i86rvokwfq6
* plugin-runner.c (main): Use the O_CLOEXEC flag, if available, when
opening the plugin directory.
opening the plugin directory.
- 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 © 2008-2021 Teddy Hogeborn
6
* Copyright © 2008-2021 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(), O_CLOEXEC */
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, fdopendir(), 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, fdopendir(),
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
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
278
234
/* If reading the flags failed, return error indication now. */
283
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
284
240
ret | FD_CLOEXEC));
285
241
}
286
#endif /* not O_CLOEXEC */
287
242
288
243
289
244
/* Mark processes as completed when they exit, and save their exit
303
258
/* No child processes */
304
259
break;
305
260
}
306
error(0, errno, "waitpid");
261
perror("waitpid");
307
262
}
308
263
309
264
/* A child exited, find it in process_list */
321
276
}
322
277
323
278
/* Prints out a password to stdout */
324
__attribute__((nonnull, warn_unused_result))
325
279
static bool print_out_password(const char *buffer, size_t length){
326
280
ssize_t ret;
327
281
for(size_t written = 0; written < length; written += (size_t)ret){
335
289
}
336
290
337
291
/* Removes and free a plugin from the plugin list */
338
__attribute__((nonnull))
339
292
static void free_plugin(plugin *plugin_node){
340
293
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
342
295
free(*arg);
343
296
}
344
free(plugin_node->name);
345
297
free(plugin_node->argv);
346
298
for(char **env = plugin_node->environ; *env != NULL; env++){
347
299
free(*env);
374
326
375
327
int main(int argc, char *argv[]){
376
328
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
378
329
char *argfile = NULL;
379
330
FILE *conffp;
380
struct dirent **direntries = NULL;
331
size_t d_name_len;
332
DIR *dir = NULL;
333
struct dirent *dirst;
381
334
struct stat st;
382
335
fd_set rfds_all;
383
336
int ret, maxfd = 0;
391
344
.sa_flags = SA_NOCLDSTOP };
392
345
char **custom_argv = NULL;
393
346
int custom_argc = 0;
394
int dir_fd = -1;
395
347
396
348
/* Establish a signal handler */
397
349
sigemptyset(&sigchld_action.sa_mask);
398
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
399
351
if(ret == -1){
400
error(0, errno, "sigaddset");
401
exitstatus = EX_OSERR;
352
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
402
354
goto fallback;
403
355
}
404
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
405
357
if(ret == -1){
406
error(0, errno, "sigaction");
407
exitstatus = EX_OSERR;
358
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
408
360
goto fallback;
409
361
}
410
362
442
394
.doc = "Group ID the plugins will run as", .group = 3 },
443
395
{ .name = "debug", .key = 132,
444
396
.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
397
{ .name = NULL }
459
398
};
460
399
461
__attribute__((nonnull(3)))
462
error_t parse_opt(int key, char *arg, struct argp_state *state){
463
errno = 0;
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
464
402
switch(key){
465
403
char *tmp;
466
intmax_t tmp_id;
404
intmax_t tmpmax;
467
405
case 'g': /* --global-options */
468
{
406
if(arg != NULL){
469
407
char *plugin_option;
470
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
471
412
if(not add_argument(getplugin(NULL), plugin_option)){
472
break;
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
473
415
}
474
416
}
475
errno = 0;
476
417
}
477
418
break;
478
419
case 'G': /* --global-env */
479
if(add_environment(getplugin(NULL), arg, true)){
480
errno = 0;
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
481
425
}
482
426
break;
483
427
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;
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;
502
438
}
503
439
}
504
errno = 0;
505
440
}
506
441
break;
507
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
508
446
{
509
447
char *envdef = strchr(arg, ':');
510
448
if(envdef == NULL){
511
argp_error(state, "No colon in \"%s\"", arg);
512
errno = EINVAL;
513
449
break;
514
450
}
515
451
*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;
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
524
454
}
525
455
}
526
456
break;
527
457
case 'd': /* --disable */
528
{
458
if(arg != NULL){
529
459
plugin *p = getplugin(arg);
530
if(p != NULL){
531
p->disabled = true;
532
errno = 0;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
533
462
}
463
p->disabled = true;
534
464
}
535
465
break;
536
466
case 'e': /* --enable */
537
{
467
if(arg != NULL){
538
468
plugin *p = getplugin(arg);
539
if(p != NULL){
540
p->disabled = false;
541
errno = 0;
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
542
471
}
472
p->disabled = false;
543
473
}
544
474
break;
545
475
case 128: /* --plugin-dir */
546
476
free(plugindir);
547
477
plugindir = strdup(arg);
548
if(plugindir != NULL){
549
errno = 0;
478
if(plugindir == NULL){
479
perror("strdup");
550
480
}
551
481
break;
552
482
case 129: /* --config-file */
553
483
/* This is already done by parse_opt_config_file() */
554
484
break;
555
485
case 130: /* --userid */
556
tmp_id = strtoimax(arg, &tmp, 10);
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
557
488
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;
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;
562
494
}
563
uid = (uid_t)tmp_id;
564
errno = 0;
565
495
break;
566
496
case 131: /* --groupid */
567
tmp_id = strtoimax(arg, &tmp, 10);
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
568
499
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;
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;
573
505
}
574
gid = (gid_t)tmp_id;
575
errno = 0;
576
506
break;
577
507
case 132: /* --debug */
578
508
debug = true;
579
509
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
510
/*
604
511
* When adding more options before this line, remember to also add a
605
512
* "case" to the "parse_opt_config_file" function below.
608
515
/* Cryptsetup always passes an argument, which is an empty
609
516
string if "none" was specified in /etc/crypttab. So if
610
517
argument was empty, we ignore it silently. */
611
if(arg[0] == '\0'){
612
break;
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
613
520
}
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
521
break;
522
case ARGP_KEY_END:
523
break;
619
524
default:
620
525
return ARGP_ERR_UNKNOWN;
621
526
}
622
return errno; /* Set to 0 at start */
527
return 0;
623
528
}
624
529
625
530
/* This option parser is the same as parse_opt() above, except it
627
532
error_t parse_opt_config_file(int key, char *arg,
628
533
__attribute__((unused))
629
534
struct argp_state *state){
630
errno = 0;
631
535
switch(key){
632
536
case 'g': /* --global-options */
633
537
case 'G': /* --global-env */
640
544
case 129: /* --config-file */
641
545
free(argfile);
642
546
argfile = strdup(arg);
643
if(argfile != NULL){
644
errno = 0;
547
if(argfile == NULL){
548
perror("strdup");
645
549
}
646
550
break;
647
551
case 130: /* --userid */
648
552
case 131: /* --groupid */
649
553
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
651
case '?': /* --help */
652
case -3: /* --usage */
653
case 'V': /* --version */
654
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
655
556
break;
656
557
default:
657
558
return ARGP_ERR_UNKNOWN;
658
559
}
659
return errno;
560
return 0;
660
561
}
661
562
662
563
struct argp argp = { .options = options,
666
567
667
568
/* Parse using parse_opt_config_file() in order to get the custom
668
569
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;
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;
683
574
goto fallback;
684
575
}
685
576
702
593
custom_argc = 1;
703
594
custom_argv = malloc(sizeof(char*) * 2);
704
595
if(custom_argv == NULL){
705
error(0, errno, "malloc");
706
exitstatus = EX_OSERR;
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
707
598
goto fallback;
708
599
}
709
600
custom_argv[0] = argv[0];
725
616
}
726
617
new_arg = strdup(p);
727
618
if(new_arg == NULL){
728
error(0, errno, "strdup");
729
exitstatus = EX_OSERR;
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
730
621
free(org_line);
731
622
goto fallback;
732
623
}
733
624
734
625
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
}
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;
759
633
}
760
634
custom_argv[custom_argc-1] = new_arg;
761
635
custom_argv[custom_argc] = NULL;
765
639
ret = fclose(conffp);
766
640
} while(ret == EOF and errno == EINTR);
767
641
if(ret == EOF){
768
error(0, errno, "fclose");
769
exitstatus = EX_IOERR;
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
770
644
goto fallback;
771
645
}
772
646
free(org_line);
774
648
/* Check for harmful errors and go to fallback. Other errors might
775
649
not affect opening plugins */
776
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
777
error(0, errno, "fopen");
778
exitstatus = EX_OSERR;
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
779
653
goto fallback;
780
654
}
781
655
}
782
/* If there were any arguments from the configuration file, pass
783
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
784
658
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;
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;
799
664
goto fallback;
800
665
}
801
666
}
802
667
803
668
/* Parse actual command line arguments, to let them override the
804
669
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
}
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;
838
675
}
839
676
840
677
if(debug){
841
for(plugin *p = plugin_list; p != NULL; p = p->next){
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
842
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
843
680
p->name ? p->name : "Global", p->argc - 1);
844
681
for(char **a = p->argv; *a != NULL; a++){
851
688
}
852
689
}
853
690
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);
691
/* Strip permissions down to nobody */
692
setgid(gid);
889
693
if(ret == -1){
890
error(0, errno, "setgid");
694
perror("setgid");
891
695
}
892
696
ret = setuid(uid);
893
697
if(ret == -1){
894
error(0, errno, "setuid");
698
perror("setuid");
895
699
}
896
700
897
701
/* Open plugin directory with close_on_exec flag */
898
702
{
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
);
703
int dir_fd = -1;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
706
#ifdef O_CLOEXEC
707
O_CLOEXEC
708
#else /* not O_CLOEXEC */
709
0
710
#endif /* not O_CLOEXEC */
711
);
712
} else {
713
dir_fd = open(plugindir, O_RDONLY |
714
#ifdef O_CLOEXEC
715
O_CLOEXEC
716
#else /* not O_CLOEXEC */
717
0
718
#endif /* not O_CLOEXEC */
719
);
720
}
906
721
if(dir_fd == -1){
907
error(0, errno, "Could not open plugin dir");
908
exitstatus = EX_UNAVAILABLE;
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
909
724
goto fallback;
910
725
}
911
726
913
728
/* Set the FD_CLOEXEC flag on the directory */
914
729
ret = set_cloexec_flag(dir_fd);
915
730
if(ret < 0){
916
error(0, errno, "set_cloexec_flag");
917
exitstatus = EX_OSERR;
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
918
734
goto fallback;
919
735
}
920
736
#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;
943
}
737
738
dir = fdopendir(dir_fd);
739
if(dir == NULL){
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
743
goto fallback;
944
744
}
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
745
}
956
746
957
747
FD_ZERO(&rfds_all);
958
748
959
749
/* 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]);
750
while(true){
751
do {
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
754
755
/* All directory entries have been processed */
756
if(dirst == NULL){
757
if(errno == EBADF){
758
perror("readdir");
759
exitstatus = EXIT_FAILURE;
760
goto fallback;
761
}
762
break;
763
}
764
765
d_name_len = strlen(dirst->d_name);
766
767
/* Ignore dotfiles, backup files and other junk */
768
{
769
bool bad_name = false;
770
771
const char const *bad_prefixes[] = { ".", "#", NULL };
772
773
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
774
".dpkg-old",
775
".dpkg-bak",
776
".dpkg-divert", NULL };
777
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
778
size_t pre_len = strlen(*pre);
779
if((d_name_len >= pre_len)
780
and strncmp((dirst->d_name), *pre, pre_len) == 0){
781
if(debug){
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
" with bad prefix %s\n", dirst->d_name, *pre);
784
}
785
bad_name = true;
786
break;
787
}
788
}
789
if(bad_name){
790
continue;
791
}
792
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
793
size_t suf_len = strlen(*suf);
794
if((d_name_len >= suf_len)
795
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
796
== 0)){
797
if(debug){
798
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
799
" with bad suffix %s\n", dirst->d_name, *suf);
800
}
801
bad_name = true;
802
break;
803
}
804
}
805
806
if(bad_name){
807
continue;
808
}
809
}
810
811
char *filename;
812
if(plugindir == NULL){
813
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
814
dirst->d_name));
815
} else {
816
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
817
plugindir,
818
dirst->d_name));
819
}
820
if(ret < 0){
821
perror("asprintf");
966
822
continue;
967
823
}
968
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
824
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
969
826
if(ret == -1){
970
error(0, errno, "stat");
971
close(plugin_fd);
972
free(direntries[i]);
827
perror("stat");
828
free(filename);
973
829
continue;
974
830
}
975
831
976
832
/* Ignore non-executable files */
977
833
if(not S_ISREG(st.st_mode)
978
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
979
X_OK, 0)) != 0)){
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
980
835
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);
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
837
" with bad type or mode\n", filename);
985
838
}
986
close(plugin_fd);
987
free(direntries[i]);
839
free(filename);
988
840
continue;
989
841
}
990
842
991
plugin *p = getplugin(direntries[i]->d_name);
843
plugin *p = getplugin(dirst->d_name);
992
844
if(p == NULL){
993
error(0, errno, "getplugin");
994
close(plugin_fd);
995
free(direntries[i]);
845
perror("getplugin");
846
free(filename);
996
847
continue;
997
848
}
998
849
if(p->disabled){
999
850
if(debug){
1000
851
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
1001
direntries[i]->d_name);
852
dirst->d_name);
1002
853
}
1003
close(plugin_fd);
1004
free(direntries[i]);
854
free(filename);
1005
855
continue;
1006
856
}
1007
857
{
1010
860
if(g != NULL){
1011
861
for(char **a = g->argv + 1; *a != NULL; a++){
1012
862
if(not add_argument(p, *a)){
1013
error(0, errno, "add_argument");
863
perror("add_argument");
1014
864
}
1015
865
}
1016
866
/* Add global environment variables */
1017
867
for(char **e = g->environ; *e != NULL; e++){
1018
868
if(not add_environment(p, *e, false)){
1019
error(0, errno, "add_environment");
869
perror("add_environment");
1020
870
}
1021
871
}
1022
872
}
1023
873
}
1024
/* If this plugin has any environment variables, we need to
1025
duplicate the environment from this process, too. */
874
/* If this plugin has any environment variables, we will call
875
using execve and need to duplicate the environment from this
876
process, too. */
1026
877
if(p->environ[0] != NULL){
1027
878
for(char **e = environ; *e != NULL; e++){
1028
879
if(not add_environment(p, *e, false)){
1029
error(0, errno, "add_environment");
880
perror("add_environment");
1030
881
}
1031
882
}
1032
883
}
1033
884
1034
885
int pipefd[2];
1035
#ifndef O_CLOEXEC
1036
886
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 */
1040
887
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
888
perror("pipe");
889
exitstatus = EXIT_FAILURE;
890
goto fallback;
891
}
1056
892
/* Ask OS to automatic close the pipe on exec */
1057
893
ret = set_cloexec_flag(pipefd[0]);
1058
894
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]);
895
perror("set_cloexec_flag");
896
exitstatus = EXIT_FAILURE;
1064
897
goto fallback;
1065
898
}
1066
899
ret = set_cloexec_flag(pipefd[1]);
1067
900
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]);
901
perror("set_cloexec_flag");
902
exitstatus = EXIT_FAILURE;
1073
903
goto fallback;
1074
904
}
1075
#endif /* not O_CLOEXEC */
1076
905
/* Block SIGCHLD until process is safely in process list */
1077
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1078
907
&sigchld_action.sa_mask,
1079
908
NULL));
1080
909
if(ret < 0){
1081
error(0, errno, "sigprocmask");
1082
exitstatus = EX_OSERR;
1083
free(direntries[i]);
910
perror("sigprocmask");
911
exitstatus = EXIT_FAILURE;
1084
912
goto fallback;
1085
913
}
1086
914
/* Starting a new process to be watched */
1089
917
pid = fork();
1090
918
} while(pid == -1 and errno == EINTR);
1091
919
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]);
920
perror("fork");
921
exitstatus = EXIT_FAILURE;
1099
922
goto fallback;
1100
923
}
1101
924
if(pid == 0){
1102
925
/* this is the child process */
1103
926
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1104
927
if(ret < 0){
1105
error(0, errno, "sigaction");
1106
_exit(EX_OSERR);
928
perror("sigaction");
929
_exit(EXIT_FAILURE);
1107
930
}
1108
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1109
932
if(ret < 0){
1110
error(0, errno, "sigprocmask");
1111
_exit(EX_OSERR);
933
perror("sigprocmask");
934
_exit(EXIT_FAILURE);
1112
935
}
1113
936
1114
937
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1115
938
if(ret == -1){
1116
error(0, errno, "dup2");
1117
_exit(EX_OSERR);
939
perror("dup2");
940
_exit(EXIT_FAILURE);
1118
941
}
1119
942
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);
943
if(dirfd(dir) < 0){
944
/* If dir has no file descriptor, we could not set FD_CLOEXEC
945
above and must now close it manually here. */
946
closedir(dir);
947
}
948
if(p->environ[0] == NULL){
949
if(execv(filename, p->argv) < 0){
950
perror("execv");
951
_exit(EXIT_FAILURE);
952
}
953
} else {
954
if(execve(filename, p->argv, p->environ) < 0){
955
perror("execve");
956
_exit(EXIT_FAILURE);
957
}
1126
958
}
1127
959
/* no return */
1128
960
}
1129
961
/* 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);
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
963
pipe */
964
free(filename);
965
plugin *new_plugin = getplugin(dirst->d_name);
1133
966
if(new_plugin == NULL){
1134
error(0, errno, "getplugin");
967
perror("getplugin");
1135
968
ret = (int)(TEMP_FAILURE_RETRY
1136
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1137
970
NULL)));
1138
971
if(ret < 0){
1139
error(0, errno, "sigprocmask");
972
perror("sigprocmask");
1140
973
}
1141
exitstatus = EX_OSERR;
1142
free(direntries[i]);
974
exitstatus = EXIT_FAILURE;
1143
975
goto fallback;
1144
976
}
1145
free(direntries[i]);
1146
977
1147
978
new_plugin->pid = pid;
1148
979
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
980
1155
981
/* Unblock SIGCHLD so signal handler can be run if this process
1156
982
has already completed */
1157
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1158
984
&sigchld_action.sa_mask,
1159
985
NULL));
1160
986
if(ret < 0){
1161
error(0, errno, "sigprocmask");
1162
exitstatus = EX_OSERR;
987
perror("sigprocmask");
988
exitstatus = EXIT_FAILURE;
1163
989
goto fallback;
1164
990
}
1165
991
1166
FD_SET(new_plugin->fd, &rfds_all);
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
1167
994
1168
995
if(maxfd < new_plugin->fd){
1169
996
maxfd = new_plugin->fd;
1170
997
}
1171
998
}
1172
999
1173
free(direntries);
1174
direntries = NULL;
1175
close(dir_fd);
1176
dir_fd = -1;
1000
TEMP_FAILURE_RETRY(closedir(dir));
1001
dir = NULL;
1177
1002
free_plugin(getplugin(NULL));
1178
1003
1179
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1192
1017
fd_set rfds = rfds_all;
1193
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1194
1019
if(select_ret == -1 and errno != EINTR){
1195
error(0, errno, "select");
1196
exitstatus = EX_OSERR;
1020
perror("select");
1021
exitstatus = EXIT_FAILURE;
1197
1022
goto fallback;
1198
1023
}
1199
1024
/* OK, now either a process completed, or something can be read
1218
1043
(intmax_t) (proc->pid),
1219
1044
WTERMSIG(proc->status),
1220
1045
strsignal(WTERMSIG(proc->status)));
1046
} else if(WCOREDUMP(proc->status)){
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
1221
1049
}
1222
1050
}
1223
1051
1224
1052
/* Remove the plugin */
1225
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1226
1055
1227
1056
/* Block signal while modifying process_list */
1228
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1230
1059
&sigchld_action.sa_mask,
1231
1060
NULL));
1232
1061
if(ret < 0){
1233
error(0, errno, "sigprocmask");
1234
exitstatus = EX_OSERR;
1062
perror("sigprocmask");
1063
exitstatus = EXIT_FAILURE;
1235
1064
goto fallback;
1236
1065
}
1237
1066
1244
1073
(sigprocmask(SIG_UNBLOCK,
1245
1074
&sigchld_action.sa_mask, NULL)));
1246
1075
if(ret < 0){
1247
error(0, errno, "sigprocmask");
1248
exitstatus = EX_OSERR;
1076
perror("sigprocmask");
1077
exitstatus = EXIT_FAILURE;
1249
1078
goto fallback;
1250
1079
}
1251
1080
1261
1090
bool bret = print_out_password(proc->buffer,
1262
1091
proc->buffer_length);
1263
1092
if(not bret){
1264
error(0, errno, "print_out_password");
1265
exitstatus = EX_IOERR;
1093
perror("print_out_password");
1094
exitstatus = EXIT_FAILURE;
1266
1095
}
1267
1096
goto fallback;
1268
1097
}
1269
1098
1270
1099
/* This process has not completed. Does it have any output? */
1271
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
1272
1103
/* This process had nothing to say at this time */
1273
1104
proc = proc->next;
1274
1105
continue;
1275
1106
}
1276
1107
/* Before reading, make the process' data buffer large enough */
1277
1108
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;
1109
proc->buffer = realloc(proc->buffer, proc->buffer_size
1110
+ (size_t) BUFFER_SIZE);
1111
if(proc->buffer == NULL){
1112
perror("malloc");
1113
exitstatus = EXIT_FAILURE;
1283
1114
goto fallback;
1284
1115
}
1285
proc->buffer = new_buffer;
1286
1116
proc->buffer_size += BUFFER_SIZE;
1287
1117
}
1288
1118
/* Read from the process */
1307
1137
1308
1138
fallback:
1309
1139
1310
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1311
and exitstatus != EX_OK)){
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1312
1141
/* Fallback if all plugins failed, none are found or an error
1313
1142
occured */
1314
1143
bool bret;
1322
1151
}
1323
1152
bret = print_out_password(passwordbuffer, len);
1324
1153
if(not bret){
1325
error(0, errno, "print_out_password");
1326
exitstatus = EX_IOERR;
1154
perror("print_out_password");
1155
exitstatus = EXIT_FAILURE;
1327
1156
}
1328
1157
}
1329
1158
1330
1159
/* Restore old signal handler */
1331
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1332
1161
if(ret == -1){
1333
error(0, errno, "sigaction");
1334
exitstatus = EX_OSERR;
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1335
1164
}
1336
1165
1337
1166
if(custom_argv != NULL){
1341
1170
free(custom_argv);
1342
1171
}
1343
1172
1344
free(direntries);
1345
1346
if(dir_fd != -1){
1347
close(dir_fd);
1173
if(dir != NULL){
1174
closedir(dir);
1348
1175
}
1349
1176
1350
1177
/* Kill the processes */
1354
1181
ret = kill(p->pid, SIGTERM);
1355
1182
if(ret == -1 and errno != ESRCH){
1356
1183
/* Set-uid proccesses might not get closed */
1357
error(0, errno, "kill");
1184
perror("kill");
1358
1185
}
1359
1186
}
1360
1187
}
1364
1191
ret = wait(NULL);
1365
1192
} while(ret >= 0);
1366
1193
if(errno != ECHILD){
1367
error(0, errno, "wait");
1194
perror("wait");
1368
1195
}
1369
1196
1370
1197
free_plugin_list();
1371
1198
1372
1199
free(plugindir);
1373
free(pluginhelperdir);
1374
1200
free(argfile);
1375
1201
1376
1202
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0