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- Committer: Teddy Hogeborn
- Date: 2009-09-04 16:32:22 UTC
- Revision ID: teddy@fukt.bsnet.se-20090904163222-l9wp25ng1e5ym0yq
* plugin-runner.c (main): When a plugin is killed by a signal, show
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
the signal name, not just the number, in the
debug log message.
* plugins.d/password-prompt.c (termination_handler): Store received
signal in
"signal_received".
(main): If exiting due to signal, re-raise signal received instead
of returning.
- 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
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
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
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf() */
28
27
#include <stddef.h> /* size_t, NULL */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
31
30
#include <stdbool.h> /* bool, true, false */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
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
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
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() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
67
68
*/
68
69
#include <errno.h> /* errno, EBADF */
69
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
71
76
72
#define BUFFER_SIZE 256
77
73
78
74
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
76
82
77
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
79
85
80
typedef struct plugin{
86
81
char *name; /* can be NULL or any plugin name */
106
101
107
102
/* Gets an existing plugin based on name,
108
103
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
104
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
112
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
107
if((p->name == name)
114
108
or (p->name and name and (strcmp(p->name, name) == 0))){
116
110
}
117
111
}
118
112
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
113
plugin *new_plugin = malloc(sizeof(plugin));
123
114
if(new_plugin == NULL){
124
115
return NULL;
125
116
}
126
117
char *copy_name = NULL;
127
118
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
119
copy_name = strdup(name);
131
120
if(copy_name == NULL){
132
int e = errno;
133
121
free(new_plugin);
134
errno = e;
135
122
return NULL;
136
123
}
137
124
}
141
128
.disabled = false,
142
129
.next = plugin_list };
143
130
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
131
new_plugin->argv = malloc(sizeof(char *) * 2);
147
132
if(new_plugin->argv == NULL){
148
int e = errno;
149
133
free(copy_name);
150
134
free(new_plugin);
151
errno = e;
152
135
return NULL;
153
136
}
154
137
new_plugin->argv[0] = copy_name;
155
138
new_plugin->argv[1] = NULL;
156
139
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
140
new_plugin->environ = malloc(sizeof(char *));
160
141
if(new_plugin->environ == NULL){
161
int e = errno;
162
142
free(copy_name);
163
143
free(new_plugin->argv);
164
144
free(new_plugin);
165
errno = e;
166
145
return NULL;
167
146
}
168
147
new_plugin->environ[0] = NULL;
173
152
}
174
153
175
154
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
155
static bool add_to_char_array(const char *new, char ***array,
178
156
int *len){
179
157
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
do {
182
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
184
sizeof(char *));
185
#else
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
187
/* overflow */
188
new_array = NULL;
189
errno = ENOMEM;
190
} else {
191
new_array = realloc(*array, (size_t)((*len) + 2)
192
* sizeof(char *));
193
}
194
#endif
195
} while(new_array == NULL and errno == EINTR);
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
196
160
/* Malloc check */
197
if(new_array == NULL){
161
if(*array == NULL){
198
162
return false;
199
163
}
200
*array = new_array;
201
164
/* Make a copy of the new string */
202
char *copy;
203
do {
204
copy = strdup(new);
205
} while(copy == NULL and errno == EINTR);
165
char *copy = strdup(new);
206
166
if(copy == NULL){
207
167
return false;
208
168
}
215
175
}
216
176
217
177
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
219
178
static bool add_argument(plugin *p, const char *arg){
220
179
if(p == NULL){
221
180
return false;
224
183
}
225
184
226
185
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
228
186
static bool add_environment(plugin *p, const char *def, bool replace){
229
187
if(p == NULL){
230
188
return false;
232
190
/* namelen = length of name of environment variable */
233
191
size_t namelen = (size_t)(strchrnul(def, '=') - def);
234
192
/* Search for this environment variable */
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
237
195
/* It already exists */
238
196
if(replace){
239
char *new_envdef;
240
do {
241
new_envdef = realloc(*envdef, strlen(def) + 1);
242
} while(new_envdef == NULL and errno == EINTR);
243
if(new_envdef == NULL){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
244
199
return false;
245
200
}
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
201
*e = new;
202
strcpy(*e, def);
248
203
}
249
204
return true;
250
205
}
252
207
return add_to_char_array(def, &(p->environ), &(p->envc));
253
208
}
254
209
255
#ifndef O_CLOEXEC
256
210
/*
257
211
* Based on the example in the GNU LibC manual chapter 13.13 "File
258
212
* Descriptor Flags".
259
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
260
214
*/
261
__attribute__((warn_unused_result))
262
215
static int set_cloexec_flag(int fd){
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
216
int ret = fcntl(fd, F_GETFD, 0);
264
217
/* If reading the flags failed, return error indication now. */
265
218
if(ret < 0){
266
219
return ret;
267
220
}
268
221
/* Store modified flag word in the descriptor. */
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
ret | FD_CLOEXEC));
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
271
223
}
272
#endif /* not O_CLOEXEC */
273
224
274
225
275
226
/* Mark processes as completed when they exit, and save their exit
289
240
/* No child processes */
290
241
break;
291
242
}
292
error(0, errno, "waitpid");
243
perror("waitpid");
293
244
}
294
245
295
246
/* A child exited, find it in process_list */
307
258
}
308
259
309
260
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
311
261
static bool print_out_password(const char *buffer, size_t length){
312
262
ssize_t ret;
313
263
for(size_t written = 0; written < length; written += (size_t)ret){
321
271
}
322
272
323
273
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
325
274
static void free_plugin(plugin *plugin_node){
326
275
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
276
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
328
277
free(*arg);
329
278
}
330
free(plugin_node->name);
331
279
free(plugin_node->argv);
332
280
for(char **env = plugin_node->environ; *env != NULL; env++){
333
281
free(*env);
360
308
361
309
int main(int argc, char *argv[]){
362
310
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
364
311
char *argfile = NULL;
365
312
FILE *conffp;
366
struct dirent **direntries = NULL;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
367
316
struct stat st;
368
317
fd_set rfds_all;
369
318
int ret, maxfd = 0;
370
319
ssize_t sret;
320
intmax_t tmpmax;
371
321
uid_t uid = 65534;
372
322
gid_t gid = 65534;
373
323
bool debug = false;
377
327
.sa_flags = SA_NOCLDSTOP };
378
328
char **custom_argv = NULL;
379
329
int custom_argc = 0;
380
int dir_fd = -1;
381
330
382
331
/* Establish a signal handler */
383
332
sigemptyset(&sigchld_action.sa_mask);
384
333
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
385
334
if(ret == -1){
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
388
337
goto fallback;
389
338
}
390
339
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
391
340
if(ret == -1){
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
394
343
goto fallback;
395
344
}
396
345
428
377
.doc = "Group ID the plugins will run as", .group = 3 },
429
378
{ .name = "debug", .key = 132,
430
379
.doc = "Debug mode", .group = 4 },
431
{ .name = "plugin-helper-dir", .key = 133,
432
.arg = "DIRECTORY",
433
.doc = "Specify a different plugin helper directory",
434
.group = 2 },
435
/*
436
* These reproduce what we would get without ARGP_NO_HELP
437
*/
438
{ .name = "help", .key = '?',
439
.doc = "Give this help list", .group = -1 },
440
{ .name = "usage", .key = -3,
441
.doc = "Give a short usage message", .group = -1 },
442
{ .name = "version", .key = 'V',
443
.doc = "Print program version", .group = -1 },
444
380
{ .name = NULL }
445
381
};
446
382
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
450
386
switch(key){
451
char *tmp;
452
intmax_t tmp_id;
453
387
case 'g': /* --global-options */
454
{
388
if(arg != NULL){
455
389
char *plugin_option;
456
390
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
457
394
if(not add_argument(getplugin(NULL), plugin_option)){
458
break;
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
459
397
}
460
398
}
461
errno = 0;
462
399
}
463
400
break;
464
401
case 'G': /* --global-env */
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
467
407
}
468
408
break;
469
409
case 'o': /* --options-for */
470
{
471
char *option_list = strchr(arg, ':');
472
if(option_list == NULL){
473
argp_error(state, "No colon in \"%s\"", arg);
474
errno = EINVAL;
475
break;
476
}
477
*option_list = '\0';
478
option_list++;
479
if(arg[0] == '\0'){
480
argp_error(state, "Empty plugin name");
481
errno = EINVAL;
482
break;
483
}
484
char *option;
485
while((option = strsep(&option_list, ",")) != NULL){
486
if(not add_argument(getplugin(arg), option)){
487
break;
410
if(arg != NULL){
411
char *plugin_name = strsep(&arg, ":");
412
if(plugin_name[0] == '\0'){
413
break;
414
}
415
char *plugin_option;
416
while((plugin_option = strsep(&arg, ",")) != NULL){
417
if(not add_argument(getplugin(plugin_name), plugin_option)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
488
420
}
489
421
}
490
errno = 0;
491
422
}
492
423
break;
493
424
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
494
428
{
495
429
char *envdef = strchr(arg, ':');
496
430
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
499
431
break;
500
432
}
501
433
*envdef = '\0';
502
envdef++;
503
if(arg[0] == '\0'){
504
argp_error(state, "Empty plugin name");
505
errno = EINVAL;
506
break;
507
}
508
if(add_environment(getplugin(arg), envdef, true)){
509
errno = 0;
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
510
436
}
511
437
}
512
438
break;
513
439
case 'd': /* --disable */
514
{
440
if(arg != NULL){
515
441
plugin *p = getplugin(arg);
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
519
444
}
445
p->disabled = true;
520
446
}
521
447
break;
522
448
case 'e': /* --enable */
523
{
449
if(arg != NULL){
524
450
plugin *p = getplugin(arg);
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
528
453
}
454
p->disabled = false;
529
455
}
530
456
break;
531
457
case 128: /* --plugin-dir */
532
458
free(plugindir);
533
459
plugindir = strdup(arg);
534
if(plugindir != NULL){
535
errno = 0;
460
if(plugindir == NULL){
461
perror("strdup");
536
462
}
537
463
break;
538
464
case 129: /* --config-file */
539
465
/* This is already done by parse_opt_config_file() */
540
466
break;
541
467
case 130: /* --userid */
542
tmp_id = strtoimax(arg, &tmp, 10);
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
543
470
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (uid_t)tmp_id){
545
argp_error(state, "Bad user ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)uid);
547
break;
471
or tmpmax != (uid_t)tmpmax){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
548
476
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
551
477
break;
552
478
case 131: /* --groupid */
553
tmp_id = strtoimax(arg, &tmp, 10);
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
554
481
if(errno != 0 or tmp == arg or *tmp != '\0'
555
or tmp_id != (gid_t)tmp_id){
556
argp_error(state, "Bad group ID number: \"%s\", using %"
557
PRIdMAX, arg, (intmax_t)gid);
558
break;
482
or tmpmax != (gid_t)tmpmax){
483
fprintf(stderr, "Bad group ID number: \"%s\", using %"
484
PRIdMAX "\n", arg, (intmax_t)gid);
485
} else {
486
gid = (gid_t)tmpmax;
559
487
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
562
488
break;
563
489
case 132: /* --debug */
564
490
debug = true;
565
491
break;
566
case 133: /* --plugin-helper-dir */
567
free(pluginhelperdir);
568
pluginhelperdir = strdup(arg);
569
if(pluginhelperdir != NULL){
570
errno = 0;
571
}
572
break;
573
/*
574
* These reproduce what we would get without ARGP_NO_HELP
575
*/
576
case '?': /* --help */
577
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
case -3: /* --usage */
581
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
argp_state_help(state, state->out_stream,
583
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
case 'V': /* --version */
586
fprintf(state->out_stream, "%s\n", argp_program_version);
587
exit(EXIT_SUCCESS);
588
break;
589
492
/*
590
493
* When adding more options before this line, remember to also add a
591
494
* "case" to the "parse_opt_config_file" function below.
594
497
/* Cryptsetup always passes an argument, which is an empty
595
498
string if "none" was specified in /etc/crypttab. So if
596
499
argument was empty, we ignore it silently. */
597
if(arg[0] == '\0'){
598
break;
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
599
502
}
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
503
break;
504
case ARGP_KEY_END:
505
break;
605
506
default:
606
507
return ARGP_ERR_UNKNOWN;
607
508
}
608
return errno; /* Set to 0 at start */
509
return 0;
609
510
}
610
511
611
512
/* This option parser is the same as parse_opt() above, except it
613
514
error_t parse_opt_config_file(int key, char *arg,
614
515
__attribute__((unused))
615
516
struct argp_state *state){
616
errno = 0;
617
517
switch(key){
618
518
case 'g': /* --global-options */
619
519
case 'G': /* --global-env */
626
526
case 129: /* --config-file */
627
527
free(argfile);
628
528
argfile = strdup(arg);
629
if(argfile != NULL){
630
errno = 0;
529
if(argfile == NULL){
530
perror("strdup");
631
531
}
632
532
break;
633
533
case 130: /* --userid */
634
534
case 131: /* --groupid */
635
535
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
640
536
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
641
538
break;
642
539
default:
643
540
return ARGP_ERR_UNKNOWN;
644
541
}
645
return errno;
542
return 0;
646
543
}
647
544
648
545
struct argp argp = { .options = options,
652
549
653
550
/* Parse using parse_opt_config_file() in order to get the custom
654
551
config file location, if any. */
655
ret = argp_parse(&argp, argc, argv,
656
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
657
NULL, NULL);
658
switch(ret){
659
case 0:
660
break;
661
case ENOMEM:
662
default:
663
errno = ret;
664
error(0, errno, "argp_parse");
665
exitstatus = EX_OSERR;
666
goto fallback;
667
case EINVAL:
668
exitstatus = EX_USAGE;
552
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
553
if(ret == ARGP_ERR_UNKNOWN){
554
fprintf(stderr, "Unknown error while parsing arguments\n");
555
exitstatus = EXIT_FAILURE;
669
556
goto fallback;
670
557
}
671
558
688
575
custom_argc = 1;
689
576
custom_argv = malloc(sizeof(char*) * 2);
690
577
if(custom_argv == NULL){
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
693
580
goto fallback;
694
581
}
695
582
custom_argv[0] = argv[0];
711
598
}
712
599
new_arg = strdup(p);
713
600
if(new_arg == NULL){
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
716
603
free(org_line);
717
604
goto fallback;
718
605
}
719
606
720
607
custom_argc += 1;
721
{
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
724
sizeof(char *));
725
#else
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
728
/* overflow */
729
errno = ENOMEM;
730
} else {
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
732
* sizeof(char *));
733
}
734
#endif
735
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
737
exitstatus = EX_OSERR;
738
free(new_arg);
739
free(org_line);
740
goto fallback;
741
} else {
742
custom_argv = new_argv;
743
}
608
custom_argv = realloc(custom_argv, sizeof(char *)
609
* ((unsigned int) custom_argc + 1));
610
if(custom_argv == NULL){
611
perror("realloc");
612
exitstatus = EXIT_FAILURE;
613
free(org_line);
614
goto fallback;
744
615
}
745
616
custom_argv[custom_argc-1] = new_arg;
746
617
custom_argv[custom_argc] = NULL;
747
618
}
748
619
}
749
do {
750
ret = fclose(conffp);
751
} while(ret == EOF and errno == EINTR);
752
if(ret == EOF){
753
error(0, errno, "fclose");
754
exitstatus = EX_IOERR;
755
goto fallback;
756
}
757
620
free(org_line);
758
621
} else {
759
622
/* Check for harmful errors and go to fallback. Other errors might
760
623
not affect opening plugins */
761
624
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
764
627
goto fallback;
765
628
}
766
629
}
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
769
632
if(custom_argv != NULL){
770
ret = argp_parse(&argp, custom_argc, custom_argv,
771
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
772
NULL, NULL);
773
switch(ret){
774
case 0:
775
break;
776
case ENOMEM:
777
default:
778
errno = ret;
779
error(0, errno, "argp_parse");
780
exitstatus = EX_OSERR;
781
goto fallback;
782
case EINVAL:
783
exitstatus = EX_CONFIG;
633
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
0, NULL);
635
if(ret == ARGP_ERR_UNKNOWN){
636
fprintf(stderr, "Unknown error while parsing arguments\n");
637
exitstatus = EXIT_FAILURE;
784
638
goto fallback;
785
639
}
786
640
}
787
641
788
642
/* Parse actual command line arguments, to let them override the
789
643
config file */
790
ret = argp_parse(&argp, argc, argv,
791
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
792
NULL, NULL);
793
switch(ret){
794
case 0:
795
break;
796
case ENOMEM:
797
default:
798
errno = ret;
799
error(0, errno, "argp_parse");
800
exitstatus = EX_OSERR;
801
goto fallback;
802
case EINVAL:
803
exitstatus = EX_USAGE;
804
goto fallback;
805
}
806
807
{
808
char *pluginhelperenv;
809
bool bret = true;
810
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
811
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
812
if(ret != -1){
813
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
814
}
815
if(ret == -1 or not bret){
816
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
817
" environment variable to \"%s\" for all plugins\n",
818
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
819
}
820
if(ret != -1){
821
free(pluginhelperenv);
822
}
644
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
645
if(ret == ARGP_ERR_UNKNOWN){
646
fprintf(stderr, "Unknown error while parsing arguments\n");
647
exitstatus = EXIT_FAILURE;
648
goto fallback;
823
649
}
824
650
825
651
if(debug){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
652
for(plugin *p = plugin_list; p != NULL; p=p->next){
827
653
fprintf(stderr, "Plugin: %s has %d arguments\n",
828
654
p->name ? p->name : "Global", p->argc - 1);
829
655
for(char **a = p->argv; *a != NULL; a++){
836
662
}
837
663
}
838
664
839
if(getuid() == 0){
840
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
842
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
if(plugindir_fd == -1){
844
if(errno != ENOENT){
845
error(0, errno, "open(\"" PDIR "\")");
846
}
847
} else {
848
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
849
if(ret == -1){
850
error(0, errno, "fstat");
851
} else {
852
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
853
ret = fchown(plugindir_fd, uid, gid);
854
if(ret == -1){
855
error(0, errno, "fchown");
856
}
857
}
858
}
859
close(plugindir_fd);
860
}
861
}
862
863
/* Lower permissions */
864
ret = setgid(gid);
665
/* Strip permissions down to nobody */
666
setgid(gid);
865
667
if(ret == -1){
866
error(0, errno, "setgid");
668
perror("setgid");
867
669
}
868
670
ret = setuid(uid);
869
671
if(ret == -1){
870
error(0, errno, "setuid");
871
}
872
873
/* Open plugin directory with close_on_exec flag */
672
perror("setuid");
673
}
674
675
if(plugindir == NULL){
676
dir = opendir(PDIR);
677
} else {
678
dir = opendir(plugindir);
679
}
680
681
if(dir == NULL){
682
perror("Could not open plugin dir");
683
exitstatus = EXIT_FAILURE;
684
goto fallback;
685
}
686
687
/* Set the FD_CLOEXEC flag on the directory, if possible */
874
688
{
875
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
876
#ifdef O_CLOEXEC
877
O_CLOEXEC
878
#else /* not O_CLOEXEC */
879
0
880
#endif /* not O_CLOEXEC */
881
);
882
if(dir_fd == -1){
883
error(0, errno, "Could not open plugin dir");
884
exitstatus = EX_UNAVAILABLE;
885
goto fallback;
886
}
887
888
#ifndef O_CLOEXEC
889
/* Set the FD_CLOEXEC flag on the directory */
890
ret = set_cloexec_flag(dir_fd);
891
if(ret < 0){
892
error(0, errno, "set_cloexec_flag");
893
exitstatus = EX_OSERR;
894
goto fallback;
895
}
896
#endif /* O_CLOEXEC */
897
}
898
899
int good_name(const struct dirent * const dirent){
900
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
901
"*.dpkg-old", "*.dpkg-bak",
902
"*.dpkg-divert", NULL };
903
#ifdef __GNUC__
904
#pragma GCC diagnostic push
905
#pragma GCC diagnostic ignored "-Wcast-qual"
906
#endif
907
for(const char **pat = (const char **)patterns;
908
*pat != NULL; pat++){
909
#ifdef __GNUC__
910
#pragma GCC diagnostic pop
911
#endif
912
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
913
!= FNM_NOMATCH){
914
if(debug){
915
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
916
" matching pattern %s\n", dirent->d_name, *pat);
917
}
918
return 0;
689
int dir_fd = dirfd(dir);
690
if(dir_fd >= 0){
691
ret = set_cloexec_flag(dir_fd);
692
if(ret < 0){
693
perror("set_cloexec_flag");
694
exitstatus = EXIT_FAILURE;
695
goto fallback;
919
696
}
920
697
}
921
return 1;
922
}
923
924
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
925
alphasort);
926
if(numplugins == -1){
927
error(0, errno, "Could not scan plugin dir");
928
direntries = NULL;
929
exitstatus = EX_OSERR;
930
goto fallback;
931
698
}
932
699
933
700
FD_ZERO(&rfds_all);
934
701
935
702
/* Read and execute any executable in the plugin directory*/
936
for(int i = 0; i < numplugins; i++){
937
938
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
939
if(plugin_fd == -1){
940
error(0, errno, "Could not open plugin");
941
free(direntries[i]);
703
while(true){
704
dirst = readdir(dir);
705
706
/* All directory entries have been processed */
707
if(dirst == NULL){
708
if(errno == EBADF){
709
perror("readdir");
710
exitstatus = EXIT_FAILURE;
711
goto fallback;
712
}
713
break;
714
}
715
716
d_name_len = strlen(dirst->d_name);
717
718
/* Ignore dotfiles, backup files and other junk */
719
{
720
bool bad_name = false;
721
722
const char const *bad_prefixes[] = { ".", "#", NULL };
723
724
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
725
".dpkg-old",
726
".dpkg-bak",
727
".dpkg-divert", NULL };
728
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
729
size_t pre_len = strlen(*pre);
730
if((d_name_len >= pre_len)
731
and strncmp((dirst->d_name), *pre, pre_len) == 0){
732
if(debug){
733
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
734
" with bad prefix %s\n", dirst->d_name, *pre);
735
}
736
bad_name = true;
737
break;
738
}
739
}
740
if(bad_name){
741
continue;
742
}
743
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
744
size_t suf_len = strlen(*suf);
745
if((d_name_len >= suf_len)
746
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
747
== 0)){
748
if(debug){
749
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
750
" with bad suffix %s\n", dirst->d_name, *suf);
751
}
752
bad_name = true;
753
break;
754
}
755
}
756
757
if(bad_name){
758
continue;
759
}
760
}
761
762
char *filename;
763
if(plugindir == NULL){
764
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
765
} else {
766
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
767
}
768
if(ret < 0){
769
perror("asprintf");
942
770
continue;
943
771
}
944
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
772
773
ret = stat(filename, &st);
945
774
if(ret == -1){
946
error(0, errno, "stat");
947
close(plugin_fd);
948
free(direntries[i]);
775
perror("stat");
776
free(filename);
949
777
continue;
950
778
}
951
779
952
780
/* Ignore non-executable files */
953
if(not S_ISREG(st.st_mode)
954
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
955
X_OK, 0)) != 0)){
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
956
782
if(debug){
957
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
958
" with bad type or mode\n",
959
plugindir != NULL ? plugindir : PDIR,
960
direntries[i]->d_name);
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
961
785
}
962
close(plugin_fd);
963
free(direntries[i]);
786
free(filename);
964
787
continue;
965
788
}
966
789
967
plugin *p = getplugin(direntries[i]->d_name);
790
plugin *p = getplugin(dirst->d_name);
968
791
if(p == NULL){
969
error(0, errno, "getplugin");
970
close(plugin_fd);
971
free(direntries[i]);
792
perror("getplugin");
793
free(filename);
972
794
continue;
973
795
}
974
796
if(p->disabled){
975
797
if(debug){
976
798
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
977
direntries[i]->d_name);
799
dirst->d_name);
978
800
}
979
close(plugin_fd);
980
free(direntries[i]);
801
free(filename);
981
802
continue;
982
803
}
983
804
{
986
807
if(g != NULL){
987
808
for(char **a = g->argv + 1; *a != NULL; a++){
988
809
if(not add_argument(p, *a)){
989
error(0, errno, "add_argument");
810
perror("add_argument");
990
811
}
991
812
}
992
813
/* Add global environment variables */
993
814
for(char **e = g->environ; *e != NULL; e++){
994
815
if(not add_environment(p, *e, false)){
995
error(0, errno, "add_environment");
816
perror("add_environment");
996
817
}
997
818
}
998
819
}
999
820
}
1000
/* If this plugin has any environment variables, we need to
1001
duplicate the environment from this process, too. */
821
/* If this plugin has any environment variables, we will call
822
using execve and need to duplicate the environment from this
823
process, too. */
1002
824
if(p->environ[0] != NULL){
1003
825
for(char **e = environ; *e != NULL; e++){
1004
826
if(not add_environment(p, *e, false)){
1005
error(0, errno, "add_environment");
827
perror("add_environment");
1006
828
}
1007
829
}
1008
830
}
1009
831
1010
832
int pipefd[2];
1011
#ifndef O_CLOEXEC
1012
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1013
#else /* O_CLOEXEC */
1014
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1015
#endif /* O_CLOEXEC */
833
ret = pipe(pipefd);
1016
834
if(ret == -1){
1017
error(0, errno, "pipe");
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
1020
goto fallback;
1021
}
1022
if(pipefd[0] >= FD_SETSIZE){
1023
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1024
FD_SETSIZE);
1025
close(pipefd[0]);
1026
close(pipefd[1]);
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
#ifndef O_CLOEXEC
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
1032
839
/* Ask OS to automatic close the pipe on exec */
1033
840
ret = set_cloexec_flag(pipefd[0]);
1034
841
if(ret < 0){
1035
error(0, errno, "set_cloexec_flag");
1036
close(pipefd[0]);
1037
close(pipefd[1]);
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
1040
844
goto fallback;
1041
845
}
1042
846
ret = set_cloexec_flag(pipefd[1]);
1043
847
if(ret < 0){
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
1049
850
goto fallback;
1050
851
}
1051
#endif /* not O_CLOEXEC */
1052
852
/* Block SIGCHLD until process is safely in process list */
1053
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1054
&sigchld_action.sa_mask,
1055
NULL));
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1056
854
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
exitstatus = EX_OSERR;
1059
free(direntries[i]);
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1060
857
goto fallback;
1061
858
}
1062
859
/* Starting a new process to be watched */
1063
pid_t pid;
1064
do {
1065
pid = fork();
1066
} while(pid == -1 and errno == EINTR);
860
pid_t pid = fork();
1067
861
if(pid == -1){
1068
error(0, errno, "fork");
1069
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1070
&sigchld_action.sa_mask, NULL));
1071
close(pipefd[0]);
1072
close(pipefd[1]);
1073
exitstatus = EX_OSERR;
1074
free(direntries[i]);
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1075
864
goto fallback;
1076
865
}
1077
866
if(pid == 0){
1078
867
/* this is the child process */
1079
868
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1080
869
if(ret < 0){
1081
error(0, errno, "sigaction");
1082
_exit(EX_OSERR);
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1083
872
}
1084
873
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
874
if(ret < 0){
1086
error(0, errno, "sigprocmask");
1087
_exit(EX_OSERR);
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1088
877
}
1089
878
1090
879
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1091
880
if(ret == -1){
1092
error(0, errno, "dup2");
1093
_exit(EX_OSERR);
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1094
883
}
1095
884
1096
if(fexecve(plugin_fd, p->argv,
1097
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1098
error(0, errno, "fexecve for %s/%s",
1099
plugindir != NULL ? plugindir : PDIR,
1100
direntries[i]->d_name);
1101
_exit(EX_OSERR);
885
if(dirfd(dir) < 0){
886
/* If dir has no file descriptor, we could not set FD_CLOEXEC
887
above and must now close it manually here. */
888
closedir(dir);
889
}
890
if(p->environ[0] == NULL){
891
if(execv(filename, p->argv) < 0){
892
perror("execv");
893
_exit(EXIT_FAILURE);
894
}
895
} else {
896
if(execve(filename, p->argv, p->environ) < 0){
897
perror("execve");
898
_exit(EXIT_FAILURE);
899
}
1102
900
}
1103
901
/* no return */
1104
902
}
1105
903
/* Parent process */
1106
904
close(pipefd[1]); /* Close unused write end of pipe */
1107
close(plugin_fd);
1108
plugin *new_plugin = getplugin(direntries[i]->d_name);
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1109
907
if(new_plugin == NULL){
1110
error(0, errno, "getplugin");
1111
ret = (int)(TEMP_FAILURE_RETRY
1112
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1113
NULL)));
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1114
910
if(ret < 0){
1115
error(0, errno, "sigprocmask");
911
perror("sigprocmask");
1116
912
}
1117
exitstatus = EX_OSERR;
1118
free(direntries[i]);
913
exitstatus = EXIT_FAILURE;
1119
914
goto fallback;
1120
915
}
1121
free(direntries[i]);
1122
916
1123
917
new_plugin->pid = pid;
1124
918
new_plugin->fd = pipefd[0];
1125
1126
if(debug){
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1129
}
1130
919
1131
920
/* Unblock SIGCHLD so signal handler can be run if this process
1132
921
has already completed */
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1134
&sigchld_action.sa_mask,
1135
NULL));
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1136
923
if(ret < 0){
1137
error(0, errno, "sigprocmask");
1138
exitstatus = EX_OSERR;
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1139
926
goto fallback;
1140
927
}
1141
928
1146
933
}
1147
934
}
1148
935
1149
free(direntries);
1150
direntries = NULL;
1151
close(dir_fd);
1152
dir_fd = -1;
936
closedir(dir);
937
dir = NULL;
1153
938
free_plugin(getplugin(NULL));
1154
939
1155
940
for(plugin *p = plugin_list; p != NULL; p = p->next){
1167
952
while(plugin_list){
1168
953
fd_set rfds = rfds_all;
1169
954
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1170
if(select_ret == -1 and errno != EINTR){
1171
error(0, errno, "select");
1172
exitstatus = EX_OSERR;
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1173
958
goto fallback;
1174
959
}
1175
960
/* OK, now either a process completed, or something can be read
1194
979
(intmax_t) (proc->pid),
1195
980
WTERMSIG(proc->status),
1196
981
strsignal(WTERMSIG(proc->status)));
982
} else if(WCOREDUMP(proc->status)){
983
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
984
" core\n", proc->name, (intmax_t) (proc->pid));
1197
985
}
1198
986
}
1199
987
1201
989
FD_CLR(proc->fd, &rfds_all);
1202
990
1203
991
/* Block signal while modifying process_list */
1204
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1205
(SIG_BLOCK,
1206
&sigchld_action.sa_mask,
1207
NULL));
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1208
993
if(ret < 0){
1209
error(0, errno, "sigprocmask");
1210
exitstatus = EX_OSERR;
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1211
996
goto fallback;
1212
997
}
1213
998
1216
1001
proc = next_plugin;
1217
1002
1218
1003
/* We are done modifying process list, so unblock signal */
1219
ret = (int)(TEMP_FAILURE_RETRY
1220
(sigprocmask(SIG_UNBLOCK,
1221
&sigchld_action.sa_mask, NULL)));
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1222
1006
if(ret < 0){
1223
error(0, errno, "sigprocmask");
1224
exitstatus = EX_OSERR;
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1225
1009
goto fallback;
1226
1010
}
1227
1011
1237
1021
bool bret = print_out_password(proc->buffer,
1238
1022
proc->buffer_length);
1239
1023
if(not bret){
1240
error(0, errno, "print_out_password");
1241
exitstatus = EX_IOERR;
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1242
1026
}
1243
1027
goto fallback;
1244
1028
}
1251
1035
}
1252
1036
/* Before reading, make the process' data buffer large enough */
1253
1037
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1254
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1255
+ (size_t) BUFFER_SIZE);
1256
if(new_buffer == NULL){
1257
error(0, errno, "malloc");
1258
exitstatus = EX_OSERR;
1038
proc->buffer = realloc(proc->buffer, proc->buffer_size
1039
+ (size_t) BUFFER_SIZE);
1040
if(proc->buffer == NULL){
1041
perror("malloc");
1042
exitstatus = EXIT_FAILURE;
1259
1043
goto fallback;
1260
1044
}
1261
proc->buffer = new_buffer;
1262
1045
proc->buffer_size += BUFFER_SIZE;
1263
1046
}
1264
1047
/* Read from the process */
1265
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1266
proc->buffer
1267
+ proc->buffer_length,
1268
BUFFER_SIZE));
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1269
1050
if(sret < 0){
1270
1051
/* Read error from this process; ignore the error */
1271
1052
proc = proc->next;
1283
1064
1284
1065
fallback:
1285
1066
1286
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1287
and exitstatus != EX_OK)){
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1288
1068
/* Fallback if all plugins failed, none are found or an error
1289
1069
occured */
1290
1070
bool bret;
1298
1078
}
1299
1079
bret = print_out_password(passwordbuffer, len);
1300
1080
if(not bret){
1301
error(0, errno, "print_out_password");
1302
exitstatus = EX_IOERR;
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1303
1083
}
1304
1084
}
1305
1085
1306
1086
/* Restore old signal handler */
1307
1087
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1308
1088
if(ret == -1){
1309
error(0, errno, "sigaction");
1310
exitstatus = EX_OSERR;
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1311
1091
}
1312
1092
1313
1093
if(custom_argv != NULL){
1317
1097
free(custom_argv);
1318
1098
}
1319
1099
1320
free(direntries);
1321
1322
if(dir_fd != -1){
1323
close(dir_fd);
1100
if(dir != NULL){
1101
closedir(dir);
1324
1102
}
1325
1103
1326
1104
/* Kill the processes */
1330
1108
ret = kill(p->pid, SIGTERM);
1331
1109
if(ret == -1 and errno != ESRCH){
1332
1110
/* Set-uid proccesses might not get closed */
1333
error(0, errno, "kill");
1111
perror("kill");
1334
1112
}
1335
1113
}
1336
1114
}
1337
1115
1338
1116
/* Wait for any remaining child processes to terminate */
1339
do {
1117
do{
1340
1118
ret = wait(NULL);
1341
1119
} while(ret >= 0);
1342
1120
if(errno != ECHILD){
1343
error(0, errno, "wait");
1121
perror("wait");
1344
1122
}
1345
1123
1346
1124
free_plugin_list();
1347
1125
1348
1126
free(plugindir);
1349
free(pluginhelperdir);
1350
1127
free(argfile);
1351
1128
1352
1129
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0