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- Committer: Teddy Hogeborn
- Date: 2021-02-01 19:30:45 UTC
- Revision ID: teddy@recompile.se-20210201193045-lpg6aprpc4srem6k
Fix issue with french translation
Initial white space was missing in both msgid and msgstr of the french
translation, leading to checking tools reporing an incomplete
translation. The string is a raw command line command, and therefore
did not need translation, so this was never a user-visible issue.
* debian/po/fr.po: Add missing whitespace to the id and translation
for msgid " mandos-keygen -F/dev/null|grep ^key_id".
Initial white space was missing in both msgid and msgstr of the french
translation, leading to checking tools reporing an incomplete
translation. The string is a raw command line command, and therefore
did not need translation, so this was never a user-visible issue.
* debian/po/fr.po: Add missing whitespace to the id and translation
for msgid " mandos-keygen -F/dev/null|grep ^key_id".
- 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
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2020 Teddy Hogeborn
6
* Copyright © 2008-2020 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read(),
51
lstat(), symlink() */
53
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
56
57
#include <errno.h> /* errno */
57
58
#include <argp.h> /* struct argp_option, struct
58
59
argp_state, struct argp,
66
67
*/
67
68
#include <errno.h> /* errno, EBADF */
68
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
69
75
70
76
#define BUFFER_SIZE 256
71
77
72
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
73
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
74
81
75
82
const char *argp_program_version = "plugin-runner " VERSION;
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
77
84
78
85
typedef struct plugin{
79
86
char *name; /* can be NULL or any plugin name */
99
106
100
107
/* Gets an existing plugin based on name,
101
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
102
110
static plugin *getplugin(char *name){
103
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
104
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
105
113
if((p->name == name)
106
114
or (p->name and name and (strcmp(p->name, name) == 0))){
108
116
}
109
117
}
110
118
/* Create a new plugin */
111
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
112
123
if(new_plugin == NULL){
113
124
return NULL;
114
125
}
115
126
char *copy_name = NULL;
116
127
if(name != NULL){
117
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
118
131
if(copy_name == NULL){
132
int e = errno;
119
133
free(new_plugin);
134
errno = e;
120
135
return NULL;
121
136
}
122
137
}
126
141
.disabled = false,
127
142
.next = plugin_list };
128
143
129
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
130
147
if(new_plugin->argv == NULL){
148
int e = errno;
131
149
free(copy_name);
132
150
free(new_plugin);
151
errno = e;
133
152
return NULL;
134
153
}
135
154
new_plugin->argv[0] = copy_name;
136
155
new_plugin->argv[1] = NULL;
137
156
138
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
139
160
if(new_plugin->environ == NULL){
161
int e = errno;
140
162
free(copy_name);
141
163
free(new_plugin->argv);
142
164
free(new_plugin);
165
errno = e;
143
166
return NULL;
144
167
}
145
168
new_plugin->environ[0] = NULL;
150
173
}
151
174
152
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
153
177
static bool add_to_char_array(const char *new, char ***array,
154
178
int *len){
155
179
/* Resize the pointed-to array to hold one more pointer */
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
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
196
/* Malloc check */
159
if(*array == NULL){
197
if(new_array == NULL){
160
198
return false;
161
199
}
200
*array = new_array;
162
201
/* Make a copy of the new string */
163
char *copy = strdup(new);
202
char *copy;
203
do {
204
copy = strdup(new);
205
} while(copy == NULL and errno == EINTR);
164
206
if(copy == NULL){
165
207
return false;
166
208
}
173
215
}
174
216
175
217
/* Add to a plugin's argument vector */
218
__attribute__((nonnull(2), warn_unused_result))
176
219
static bool add_argument(plugin *p, const char *arg){
177
220
if(p == NULL){
178
221
return false;
181
224
}
182
225
183
226
/* Add to a plugin's environment */
227
__attribute__((nonnull(2), warn_unused_result))
184
228
static bool add_environment(plugin *p, const char *def, bool replace){
185
229
if(p == NULL){
186
230
return false;
188
232
/* namelen = length of name of environment variable */
189
233
size_t namelen = (size_t)(strchrnul(def, '=') - def);
190
234
/* Search for this environment variable */
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
235
for(char **envdef = p->environ; *envdef != NULL; envdef++){
236
if(strncmp(*envdef, def, namelen + 1) == 0){
193
237
/* It already exists */
194
238
if(replace){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
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
244
return false;
198
245
}
199
*e = new;
200
strcpy(*e, def);
246
*envdef = new_envdef;
247
strcpy(*envdef, def);
201
248
}
202
249
return true;
203
250
}
205
252
return add_to_char_array(def, &(p->environ), &(p->envc));
206
253
}
207
254
255
#ifndef O_CLOEXEC
208
256
/*
209
257
* Based on the example in the GNU LibC manual chapter 13.13 "File
210
258
* Descriptor Flags".
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
259
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
212
260
*/
261
__attribute__((warn_unused_result))
213
262
static int set_cloexec_flag(int fd){
214
int ret = fcntl(fd, F_GETFD, 0);
263
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
215
264
/* If reading the flags failed, return error indication now. */
216
265
if(ret < 0){
217
266
return ret;
218
267
}
219
268
/* Store modified flag word in the descriptor. */
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
269
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
270
ret | FD_CLOEXEC));
221
271
}
272
#endif /* not O_CLOEXEC */
222
273
223
274
224
275
/* Mark processes as completed when they exit, and save their exit
238
289
/* No child processes */
239
290
break;
240
291
}
241
perror("waitpid");
292
error(0, errno, "waitpid");
242
293
}
243
294
244
295
/* A child exited, find it in process_list */
256
307
}
257
308
258
309
/* Prints out a password to stdout */
310
__attribute__((nonnull, warn_unused_result))
259
311
static bool print_out_password(const char *buffer, size_t length){
260
312
ssize_t ret;
261
313
for(size_t written = 0; written < length; written += (size_t)ret){
269
321
}
270
322
271
323
/* Removes and free a plugin from the plugin list */
324
__attribute__((nonnull))
272
325
static void free_plugin(plugin *plugin_node){
273
326
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
275
328
free(*arg);
276
329
}
330
free(plugin_node->name);
277
331
free(plugin_node->argv);
278
332
for(char **env = plugin_node->environ; *env != NULL; env++){
279
333
free(*env);
306
360
307
361
int main(int argc, char *argv[]){
308
362
char *plugindir = NULL;
363
char *pluginhelperdir = NULL;
309
364
char *argfile = NULL;
310
365
FILE *conffp;
311
size_t d_name_len;
312
DIR *dir = NULL;
313
struct dirent *dirst;
366
struct dirent **direntries = NULL;
314
367
struct stat st;
315
368
fd_set rfds_all;
316
369
int ret, maxfd = 0;
317
370
ssize_t sret;
318
intmax_t tmpmax;
319
371
uid_t uid = 65534;
320
372
gid_t gid = 65534;
321
373
bool debug = false;
325
377
.sa_flags = SA_NOCLDSTOP };
326
378
char **custom_argv = NULL;
327
379
int custom_argc = 0;
380
int dir_fd = -1;
328
381
329
382
/* Establish a signal handler */
330
383
sigemptyset(&sigchld_action.sa_mask);
331
384
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
332
385
if(ret == -1){
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
386
error(0, errno, "sigaddset");
387
exitstatus = EX_OSERR;
335
388
goto fallback;
336
389
}
337
390
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
338
391
if(ret == -1){
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
392
error(0, errno, "sigaction");
393
exitstatus = EX_OSERR;
341
394
goto fallback;
342
395
}
343
396
375
428
.doc = "Group ID the plugins will run as", .group = 3 },
376
429
{ .name = "debug", .key = 132,
377
430
.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 },
378
444
{ .name = NULL }
379
445
};
380
446
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
383
char *tmp;
447
__attribute__((nonnull(3)))
448
error_t parse_opt(int key, char *arg, struct argp_state *state){
449
errno = 0;
384
450
switch(key){
451
char *tmp;
452
intmax_t tmp_id;
385
453
case 'g': /* --global-options */
386
if(arg != NULL){
454
{
387
455
char *plugin_option;
388
456
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
392
457
if(not add_argument(getplugin(NULL), plugin_option)){
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
458
break;
395
459
}
396
460
}
461
errno = 0;
397
462
}
398
463
break;
399
464
case 'G': /* --global-env */
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
465
if(add_environment(getplugin(NULL), arg, true)){
466
errno = 0;
405
467
}
406
468
break;
407
469
case 'o': /* --options-for */
408
if(arg != NULL){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
411
break;
412
}
413
char *plugin_option;
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
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;
418
488
}
419
489
}
490
errno = 0;
420
491
}
421
492
break;
422
493
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
426
494
{
427
495
char *envdef = strchr(arg, ':');
428
496
if(envdef == NULL){
497
argp_error(state, "No colon in \"%s\"", arg);
498
errno = EINVAL;
429
499
break;
430
500
}
431
501
*envdef = '\0';
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
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
510
}
435
511
}
436
512
break;
437
513
case 'd': /* --disable */
438
if(arg != NULL){
514
{
439
515
plugin *p = getplugin(arg);
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
516
if(p != NULL){
517
p->disabled = true;
518
errno = 0;
442
519
}
443
p->disabled = true;
444
520
}
445
521
break;
446
522
case 'e': /* --enable */
447
if(arg != NULL){
523
{
448
524
plugin *p = getplugin(arg);
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
525
if(p != NULL){
526
p->disabled = false;
527
errno = 0;
451
528
}
452
p->disabled = false;
453
529
}
454
530
break;
455
531
case 128: /* --plugin-dir */
456
532
free(plugindir);
457
533
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
534
if(plugindir != NULL){
535
errno = 0;
536
}
461
537
break;
462
538
case 129: /* --config-file */
463
539
/* This is already done by parse_opt_config_file() */
464
540
break;
465
541
case 130: /* --userid */
466
errno = 0;
467
tmpmax = strtoimax(arg, &tmp, 10);
542
tmp_id = strtoimax(arg, &tmp, 10);
468
543
if(errno != 0 or tmp == arg or *tmp != '\0'
469
or tmpmax != (uid_t)tmpmax){
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
472
} else {
473
uid = (uid_t)tmpmax;
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;
474
548
}
549
uid = (uid_t)tmp_id;
550
errno = 0;
475
551
break;
476
552
case 131: /* --groupid */
477
errno = 0;
478
tmpmax = strtoimax(arg, &tmp, 10);
553
tmp_id = strtoimax(arg, &tmp, 10);
479
554
if(errno != 0 or tmp == arg or *tmp != '\0'
480
or tmpmax != (gid_t)tmpmax){
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
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;
485
559
}
560
gid = (gid_t)tmp_id;
561
errno = 0;
486
562
break;
487
563
case 132: /* --debug */
488
564
debug = true;
489
565
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;
490
589
/*
491
590
* When adding more options before this line, remember to also add a
492
591
* "case" to the "parse_opt_config_file" function below.
495
594
/* Cryptsetup always passes an argument, which is an empty
496
595
string if "none" was specified in /etc/crypttab. So if
497
596
argument was empty, we ignore it silently. */
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
597
if(arg[0] == '\0'){
598
break;
500
599
}
501
break;
502
case ARGP_KEY_END:
503
break;
600
#if __GNUC__ >= 7
601
__attribute__((fallthrough));
602
#else
603
/* FALLTHROUGH */
604
#endif
504
605
default:
505
606
return ARGP_ERR_UNKNOWN;
506
607
}
507
return 0;
608
return errno; /* Set to 0 at start */
508
609
}
509
610
510
611
/* This option parser is the same as parse_opt() above, except it
512
613
error_t parse_opt_config_file(int key, char *arg,
513
614
__attribute__((unused))
514
615
struct argp_state *state){
616
errno = 0;
515
617
switch(key){
516
618
case 'g': /* --global-options */
517
619
case 'G': /* --global-env */
524
626
case 129: /* --config-file */
525
627
free(argfile);
526
628
argfile = strdup(arg);
527
if(argfile == NULL){
528
perror("strdup");
629
if(argfile != NULL){
630
errno = 0;
529
631
}
530
break;
632
break;
531
633
case 130: /* --userid */
532
634
case 131: /* --groupid */
533
635
case 132: /* --debug */
636
case 133: /* --plugin-helper-dir */
637
case '?': /* --help */
638
case -3: /* --usage */
639
case 'V': /* --version */
534
640
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
536
641
break;
537
642
default:
538
643
return ARGP_ERR_UNKNOWN;
539
644
}
540
return 0;
645
return errno;
541
646
}
542
647
543
648
struct argp argp = { .options = options,
547
652
548
653
/* Parse using parse_opt_config_file() in order to get the custom
549
654
config file location, if any. */
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
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;
554
669
goto fallback;
555
670
}
556
671
562
677
conffp = fopen(AFILE, "r");
563
678
} else {
564
679
conffp = fopen(argfile, "r");
565
}
680
}
566
681
if(conffp != NULL){
567
682
char *org_line = NULL;
568
683
char *p, *arg, *new_arg, *line;
573
688
custom_argc = 1;
574
689
custom_argv = malloc(sizeof(char*) * 2);
575
690
if(custom_argv == NULL){
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
691
error(0, errno, "malloc");
692
exitstatus = EX_OSERR;
578
693
goto fallback;
579
694
}
580
695
custom_argv[0] = argv[0];
596
711
}
597
712
new_arg = strdup(p);
598
713
if(new_arg == NULL){
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
714
error(0, errno, "strdup");
715
exitstatus = EX_OSERR;
601
716
free(org_line);
602
717
goto fallback;
603
718
}
604
719
605
720
custom_argc += 1;
606
custom_argv = realloc(custom_argv, sizeof(char *)
607
* ((unsigned int) custom_argc + 1));
608
if(custom_argv == NULL){
609
perror("realloc");
610
exitstatus = EXIT_FAILURE;
611
free(org_line);
612
goto fallback;
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
}
613
744
}
614
745
custom_argv[custom_argc-1] = new_arg;
615
custom_argv[custom_argc] = NULL;
746
custom_argv[custom_argc] = NULL;
616
747
}
617
748
}
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
}
618
757
free(org_line);
619
758
} else {
620
759
/* Check for harmful errors and go to fallback. Other errors might
621
760
not affect opening plugins */
622
761
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
762
error(0, errno, "fopen");
763
exitstatus = EX_OSERR;
625
764
goto fallback;
626
765
}
627
766
}
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
767
/* If there were any arguments from the configuration file, pass
768
them to parser as command line arguments */
630
769
if(custom_argv != NULL){
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
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;
636
784
goto fallback;
637
785
}
638
786
}
639
787
640
788
/* Parse actual command line arguments, to let them override the
641
789
config file */
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
646
goto fallback;
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
}
647
823
}
648
824
649
825
if(debug){
650
for(plugin *p = plugin_list; p != NULL; p=p->next){
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
651
827
fprintf(stderr, "Plugin: %s has %d arguments\n",
652
828
p->name ? p->name : "Global", p->argc - 1);
653
829
for(char **a = p->argv; *a != NULL; a++){
660
836
}
661
837
}
662
838
663
/* Strip permissions down to nobody */
664
setgid(gid);
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
/* Work around Debian bug #981302
863
<https://bugs.debian.org/981302> */
864
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
865
ret = symlink("/proc/self/fd", "/dev/fd");
866
if(ret == -1){
867
error(0, errno, "Failed to create /dev/fd symlink");
868
}
869
}
870
}
871
872
/* Lower permissions */
873
ret = setgid(gid);
665
874
if(ret == -1){
666
perror("setgid");
875
error(0, errno, "setgid");
667
876
}
668
877
ret = setuid(uid);
669
878
if(ret == -1){
670
perror("setuid");
671
}
672
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
879
error(0, errno, "setuid");
880
}
881
882
/* Open plugin directory with close_on_exec flag */
686
883
{
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
884
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
885
#ifdef O_CLOEXEC
886
O_CLOEXEC
887
#else /* not O_CLOEXEC */
888
0
889
#endif /* not O_CLOEXEC */
890
);
891
if(dir_fd == -1){
892
error(0, errno, "Could not open plugin dir");
893
exitstatus = EX_UNAVAILABLE;
894
goto fallback;
895
}
896
897
#ifndef O_CLOEXEC
898
/* Set the FD_CLOEXEC flag on the directory */
899
ret = set_cloexec_flag(dir_fd);
900
if(ret < 0){
901
error(0, errno, "set_cloexec_flag");
902
exitstatus = EX_OSERR;
903
goto fallback;
904
}
905
#endif /* O_CLOEXEC */
906
}
907
908
int good_name(const struct dirent * const dirent){
909
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
910
"*.dpkg-old", "*.dpkg-bak",
911
"*.dpkg-divert", NULL };
912
#ifdef __GNUC__
913
#pragma GCC diagnostic push
914
#pragma GCC diagnostic ignored "-Wcast-qual"
915
#endif
916
for(const char **pat = (const char **)patterns;
917
*pat != NULL; pat++){
918
#ifdef __GNUC__
919
#pragma GCC diagnostic pop
920
#endif
921
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
922
!= FNM_NOMATCH){
923
if(debug){
924
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
925
" matching pattern %s\n", dirent->d_name, *pat);
926
}
927
return 0;
694
928
}
695
929
}
930
return 1;
931
}
932
933
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
934
alphasort);
935
if(numplugins == -1){
936
error(0, errno, "Could not scan plugin dir");
937
direntries = NULL;
938
exitstatus = EX_OSERR;
939
goto fallback;
696
940
}
697
941
698
942
FD_ZERO(&rfds_all);
699
943
700
944
/* Read and execute any executable in the plugin directory*/
701
while(true){
702
dirst = readdir(dir);
703
704
/* All directory entries have been processed */
705
if(dirst == NULL){
706
if(errno == EBADF){
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
break;
712
}
713
714
d_name_len = strlen(dirst->d_name);
715
716
/* Ignore dotfiles, backup files and other junk */
717
{
718
bool bad_name = false;
719
720
const char const *bad_prefixes[] = { ".", "#", NULL };
721
722
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
723
".dpkg-old",
724
".dpkg-bak",
725
".dpkg-divert", NULL };
726
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
727
size_t pre_len = strlen(*pre);
728
if((d_name_len >= pre_len)
729
and strncmp((dirst->d_name), *pre, pre_len) == 0){
730
if(debug){
731
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
732
" with bad prefix %s\n", dirst->d_name, *pre);
733
}
734
bad_name = true;
735
break;
736
}
737
}
738
if(bad_name){
739
continue;
740
}
741
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
742
size_t suf_len = strlen(*suf);
743
if((d_name_len >= suf_len)
744
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
745
== 0)){
746
if(debug){
747
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
748
" with bad suffix %s\n", dirst->d_name, *suf);
749
}
750
bad_name = true;
751
break;
752
}
753
}
754
755
if(bad_name){
756
continue;
757
}
758
}
759
760
char *filename;
761
if(plugindir == NULL){
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
763
} else {
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
765
}
766
if(ret < 0){
767
perror("asprintf");
945
for(int i = 0; i < numplugins; i++){
946
947
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
948
if(plugin_fd == -1){
949
error(0, errno, "Could not open plugin");
950
free(direntries[i]);
768
951
continue;
769
952
}
770
771
ret = stat(filename, &st);
953
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
772
954
if(ret == -1){
773
perror("stat");
774
free(filename);
955
error(0, errno, "stat");
956
close(plugin_fd);
957
free(direntries[i]);
775
958
continue;
776
959
}
777
960
778
961
/* Ignore non-executable files */
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
962
if(not S_ISREG(st.st_mode)
963
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
964
X_OK, 0)) != 0)){
780
965
if(debug){
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
966
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
967
" with bad type or mode\n",
968
plugindir != NULL ? plugindir : PDIR,
969
direntries[i]->d_name);
783
970
}
784
free(filename);
971
close(plugin_fd);
972
free(direntries[i]);
785
973
continue;
786
974
}
787
975
788
plugin *p = getplugin(dirst->d_name);
976
plugin *p = getplugin(direntries[i]->d_name);
789
977
if(p == NULL){
790
perror("getplugin");
791
free(filename);
978
error(0, errno, "getplugin");
979
close(plugin_fd);
980
free(direntries[i]);
792
981
continue;
793
982
}
794
983
if(p->disabled){
795
984
if(debug){
796
985
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
797
dirst->d_name);
986
direntries[i]->d_name);
798
987
}
799
free(filename);
988
close(plugin_fd);
989
free(direntries[i]);
800
990
continue;
801
991
}
802
992
{
805
995
if(g != NULL){
806
996
for(char **a = g->argv + 1; *a != NULL; a++){
807
997
if(not add_argument(p, *a)){
808
perror("add_argument");
998
error(0, errno, "add_argument");
809
999
}
810
1000
}
811
1001
/* Add global environment variables */
812
1002
for(char **e = g->environ; *e != NULL; e++){
813
1003
if(not add_environment(p, *e, false)){
814
perror("add_environment");
1004
error(0, errno, "add_environment");
815
1005
}
816
1006
}
817
1007
}
818
1008
}
819
/* If this plugin has any environment variables, we will call
820
using execve and need to duplicate the environment from this
821
process, too. */
1009
/* If this plugin has any environment variables, we need to
1010
duplicate the environment from this process, too. */
822
1011
if(p->environ[0] != NULL){
823
1012
for(char **e = environ; *e != NULL; e++){
824
1013
if(not add_environment(p, *e, false)){
825
perror("add_environment");
1014
error(0, errno, "add_environment");
826
1015
}
827
1016
}
828
1017
}
829
1018
830
1019
int pipefd[2];
831
ret = pipe(pipefd);
1020
#ifndef O_CLOEXEC
1021
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1022
#else /* O_CLOEXEC */
1023
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1024
#endif /* O_CLOEXEC */
832
1025
if(ret == -1){
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
835
goto fallback;
836
}
1026
error(0, errno, "pipe");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
1029
goto fallback;
1030
}
1031
if(pipefd[0] >= FD_SETSIZE){
1032
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1033
FD_SETSIZE);
1034
close(pipefd[0]);
1035
close(pipefd[1]);
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
1038
goto fallback;
1039
}
1040
#ifndef O_CLOEXEC
837
1041
/* Ask OS to automatic close the pipe on exec */
838
1042
ret = set_cloexec_flag(pipefd[0]);
839
1043
if(ret < 0){
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "set_cloexec_flag");
1045
close(pipefd[0]);
1046
close(pipefd[1]);
1047
exitstatus = EX_OSERR;
1048
free(direntries[i]);
842
1049
goto fallback;
843
1050
}
844
1051
ret = set_cloexec_flag(pipefd[1]);
845
1052
if(ret < 0){
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1053
error(0, errno, "set_cloexec_flag");
1054
close(pipefd[0]);
1055
close(pipefd[1]);
1056
exitstatus = EX_OSERR;
1057
free(direntries[i]);
848
1058
goto fallback;
849
1059
}
1060
#endif /* not O_CLOEXEC */
850
1061
/* Block SIGCHLD until process is safely in process list */
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1062
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1063
&sigchld_action.sa_mask,
1064
NULL));
852
1065
if(ret < 0){
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1066
error(0, errno, "sigprocmask");
1067
exitstatus = EX_OSERR;
1068
free(direntries[i]);
855
1069
goto fallback;
856
1070
}
857
1071
/* Starting a new process to be watched */
858
pid_t pid = fork();
1072
pid_t pid;
1073
do {
1074
pid = fork();
1075
} while(pid == -1 and errno == EINTR);
859
1076
if(pid == -1){
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1077
error(0, errno, "fork");
1078
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1079
&sigchld_action.sa_mask, NULL));
1080
close(pipefd[0]);
1081
close(pipefd[1]);
1082
exitstatus = EX_OSERR;
1083
free(direntries[i]);
862
1084
goto fallback;
863
1085
}
864
1086
if(pid == 0){
865
1087
/* this is the child process */
866
1088
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
867
1089
if(ret < 0){
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1090
error(0, errno, "sigaction");
1091
_exit(EX_OSERR);
870
1092
}
871
1093
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
872
1094
if(ret < 0){
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1095
error(0, errno, "sigprocmask");
1096
_exit(EX_OSERR);
875
1097
}
876
1098
877
1099
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
878
1100
if(ret == -1){
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1101
error(0, errno, "dup2");
1102
_exit(EX_OSERR);
881
1103
}
882
1104
883
if(dirfd(dir) < 0){
884
/* If dir has no file descriptor, we could not set FD_CLOEXEC
885
above and must now close it manually here. */
886
closedir(dir);
887
}
888
if(p->environ[0] == NULL){
889
if(execv(filename, p->argv) < 0){
890
perror("execv");
891
_exit(EXIT_FAILURE);
892
}
893
} else {
894
if(execve(filename, p->argv, p->environ) < 0){
895
perror("execve");
896
_exit(EXIT_FAILURE);
897
}
1105
if(fexecve(plugin_fd, p->argv,
1106
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1107
error(0, errno, "fexecve for %s/%s",
1108
plugindir != NULL ? plugindir : PDIR,
1109
direntries[i]->d_name);
1110
_exit(EX_OSERR);
898
1111
}
899
1112
/* no return */
900
1113
}
901
1114
/* Parent process */
902
1115
close(pipefd[1]); /* Close unused write end of pipe */
903
free(filename);
904
plugin *new_plugin = getplugin(dirst->d_name);
1116
close(plugin_fd);
1117
plugin *new_plugin = getplugin(direntries[i]->d_name);
905
1118
if(new_plugin == NULL){
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1119
error(0, errno, "getplugin");
1120
ret = (int)(TEMP_FAILURE_RETRY
1121
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1122
NULL)));
908
1123
if(ret < 0){
909
perror("sigprocmask");
1124
error(0, errno, "sigprocmask");
910
1125
}
911
exitstatus = EXIT_FAILURE;
1126
exitstatus = EX_OSERR;
1127
free(direntries[i]);
912
1128
goto fallback;
913
1129
}
1130
free(direntries[i]);
914
1131
915
1132
new_plugin->pid = pid;
916
1133
new_plugin->fd = pipefd[0];
917
1134
1135
if(debug){
1136
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1137
new_plugin->name, (intmax_t) (new_plugin->pid));
1138
}
1139
918
1140
/* Unblock SIGCHLD so signal handler can be run if this process
919
1141
has already completed */
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1142
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1143
&sigchld_action.sa_mask,
1144
NULL));
921
1145
if(ret < 0){
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1146
error(0, errno, "sigprocmask");
1147
exitstatus = EX_OSERR;
924
1148
goto fallback;
925
1149
}
926
1150
931
1155
}
932
1156
}
933
1157
934
closedir(dir);
935
dir = NULL;
1158
free(direntries);
1159
direntries = NULL;
1160
close(dir_fd);
1161
dir_fd = -1;
936
1162
free_plugin(getplugin(NULL));
937
1163
938
1164
for(plugin *p = plugin_list; p != NULL; p = p->next){
950
1176
while(plugin_list){
951
1177
fd_set rfds = rfds_all;
952
1178
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1179
if(select_ret == -1 and errno != EINTR){
1180
error(0, errno, "select");
1181
exitstatus = EX_OSERR;
956
1182
goto fallback;
957
1183
}
958
1184
/* OK, now either a process completed, or something can be read
973
1199
WEXITSTATUS(proc->status));
974
1200
} else if(WIFSIGNALED(proc->status)){
975
1201
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
976
" signal %d\n", proc->name,
1202
" signal %d: %s\n", proc->name,
977
1203
(intmax_t) (proc->pid),
978
WTERMSIG(proc->status));
979
} else if(WCOREDUMP(proc->status)){
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
981
" core\n", proc->name, (intmax_t) (proc->pid));
1204
WTERMSIG(proc->status),
1205
strsignal(WTERMSIG(proc->status)));
982
1206
}
983
1207
}
984
1208
986
1210
FD_CLR(proc->fd, &rfds_all);
987
1211
988
1212
/* Block signal while modifying process_list */
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1213
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1214
(SIG_BLOCK,
1215
&sigchld_action.sa_mask,
1216
NULL));
990
1217
if(ret < 0){
991
perror("sigprocmask");
992
exitstatus = EXIT_FAILURE;
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
993
1220
goto fallback;
994
1221
}
995
1222
998
1225
proc = next_plugin;
999
1226
1000
1227
/* We are done modifying process list, so unblock signal */
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1228
ret = (int)(TEMP_FAILURE_RETRY
1229
(sigprocmask(SIG_UNBLOCK,
1230
&sigchld_action.sa_mask, NULL)));
1003
1231
if(ret < 0){
1004
perror("sigprocmask");
1005
exitstatus = EXIT_FAILURE;
1232
error(0, errno, "sigprocmask");
1233
exitstatus = EX_OSERR;
1006
1234
goto fallback;
1007
1235
}
1008
1236
1018
1246
bool bret = print_out_password(proc->buffer,
1019
1247
proc->buffer_length);
1020
1248
if(not bret){
1021
perror("print_out_password");
1022
exitstatus = EXIT_FAILURE;
1249
error(0, errno, "print_out_password");
1250
exitstatus = EX_IOERR;
1023
1251
}
1024
1252
goto fallback;
1025
1253
}
1032
1260
}
1033
1261
/* Before reading, make the process' data buffer large enough */
1034
1262
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1035
proc->buffer = realloc(proc->buffer, proc->buffer_size
1036
+ (size_t) BUFFER_SIZE);
1037
if(proc->buffer == NULL){
1038
perror("malloc");
1039
exitstatus = EXIT_FAILURE;
1263
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1264
+ (size_t) BUFFER_SIZE);
1265
if(new_buffer == NULL){
1266
error(0, errno, "malloc");
1267
exitstatus = EX_OSERR;
1040
1268
goto fallback;
1041
1269
}
1270
proc->buffer = new_buffer;
1042
1271
proc->buffer_size += BUFFER_SIZE;
1043
1272
}
1044
1273
/* Read from the process */
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1274
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1275
proc->buffer
1276
+ proc->buffer_length,
1277
BUFFER_SIZE));
1047
1278
if(sret < 0){
1048
1279
/* Read error from this process; ignore the error */
1049
1280
proc = proc->next;
1061
1292
1062
1293
fallback:
1063
1294
1064
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1295
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1296
and exitstatus != EX_OK)){
1065
1297
/* Fallback if all plugins failed, none are found or an error
1066
1298
occured */
1067
1299
bool bret;
1075
1307
}
1076
1308
bret = print_out_password(passwordbuffer, len);
1077
1309
if(not bret){
1078
perror("print_out_password");
1079
exitstatus = EXIT_FAILURE;
1310
error(0, errno, "print_out_password");
1311
exitstatus = EX_IOERR;
1080
1312
}
1081
1313
}
1082
1314
1083
1315
/* Restore old signal handler */
1084
1316
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1085
1317
if(ret == -1){
1086
perror("sigaction");
1087
exitstatus = EXIT_FAILURE;
1318
error(0, errno, "sigaction");
1319
exitstatus = EX_OSERR;
1088
1320
}
1089
1321
1090
1322
if(custom_argv != NULL){
1094
1326
free(custom_argv);
1095
1327
}
1096
1328
1097
if(dir != NULL){
1098
closedir(dir);
1329
free(direntries);
1330
1331
if(dir_fd != -1){
1332
close(dir_fd);
1099
1333
}
1100
1334
1101
1335
/* Kill the processes */
1105
1339
ret = kill(p->pid, SIGTERM);
1106
1340
if(ret == -1 and errno != ESRCH){
1107
1341
/* Set-uid proccesses might not get closed */
1108
perror("kill");
1342
error(0, errno, "kill");
1109
1343
}
1110
1344
}
1111
1345
}
1112
1346
1113
1347
/* Wait for any remaining child processes to terminate */
1114
do{
1348
do {
1115
1349
ret = wait(NULL);
1116
1350
} while(ret >= 0);
1117
1351
if(errno != ECHILD){
1118
perror("wait");
1352
error(0, errno, "wait");
1119
1353
}
1120
1354
1121
1355
free_plugin_list();
1122
1356
1123
1357
free(plugindir);
1358
free(pluginhelperdir);
1124
1359
free(argfile);
1125
1360
1126
1361
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0