To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 740
- compare with another revision
- download diff
- download tarball
- view history from revision 740
- Committer: Teddy Hogeborn
- Date: 2014-12-21 12:56:08 UTC
- Revision ID: teddy@recompile.se-20141221125608-bmkvujlj39srpwd3
mandos-keygen: Fix some stylistic quoting issues.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- 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
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
O_CLOEXEC, pipe2() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
40
WEXITSTATUS(), WTERMSIG(),
42
41
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
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
*/
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
58
57
#include <errno.h> /* errno */
59
58
#include <argp.h> /* struct argp_option, struct
60
59
argp_state, struct argp,
68
67
*/
69
68
#include <errno.h> /* errno, EBADF */
70
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() */
71
75
72
76
#define BUFFER_SIZE 256
73
77
75
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
80
77
81
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
79
83
80
84
typedef struct plugin{
81
85
char *name; /* can be NULL or any plugin name */
101
105
102
106
/* Gets an existing plugin based on name,
103
107
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
104
109
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
110
/* Check for existing plugin with that name */
106
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
112
if((p->name == name)
108
113
or (p->name and name and (strcmp(p->name, name) == 0))){
110
115
}
111
116
}
112
117
/* Create a new plugin */
113
plugin *new_plugin = malloc(sizeof(plugin));
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
114
122
if(new_plugin == NULL){
115
123
return NULL;
116
124
}
117
125
char *copy_name = NULL;
118
126
if(name != NULL){
119
copy_name = strdup(name);
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
120
130
if(copy_name == NULL){
131
int e = errno;
121
132
free(new_plugin);
133
errno = e;
122
134
return NULL;
123
135
}
124
136
}
128
140
.disabled = false,
129
141
.next = plugin_list };
130
142
131
new_plugin->argv = malloc(sizeof(char *) * 2);
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
132
146
if(new_plugin->argv == NULL){
147
int e = errno;
133
148
free(copy_name);
134
149
free(new_plugin);
150
errno = e;
135
151
return NULL;
136
152
}
137
153
new_plugin->argv[0] = copy_name;
138
154
new_plugin->argv[1] = NULL;
139
155
140
new_plugin->environ = malloc(sizeof(char *));
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
141
159
if(new_plugin->environ == NULL){
160
int e = errno;
142
161
free(copy_name);
143
162
free(new_plugin->argv);
144
163
free(new_plugin);
164
errno = e;
145
165
return NULL;
146
166
}
147
167
new_plugin->environ[0] = NULL;
152
172
}
153
173
154
174
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
155
176
static bool add_to_char_array(const char *new, char ***array,
156
177
int *len){
157
178
/* Resize the pointed-to array to hold one more pointer */
158
*array = realloc(*array, sizeof(char *)
159
* (size_t) ((*len) + 2));
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
160
184
/* Malloc check */
161
if(*array == NULL){
185
if(new_array == NULL){
162
186
return false;
163
187
}
188
*array = new_array;
164
189
/* Make a copy of the new string */
165
char *copy = strdup(new);
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
166
194
if(copy == NULL){
167
195
return false;
168
196
}
175
203
}
176
204
177
205
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
178
207
static bool add_argument(plugin *p, const char *arg){
179
208
if(p == NULL){
180
209
return false;
183
212
}
184
213
185
214
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
186
216
static bool add_environment(plugin *p, const char *def, bool replace){
187
217
if(p == NULL){
188
218
return false;
190
220
/* namelen = length of name of environment variable */
191
221
size_t namelen = (size_t)(strchrnul(def, '=') - def);
192
222
/* Search for this environment variable */
193
for(char **e = p->environ; *e != NULL; e++){
194
if(strncmp(*e, def, namelen + 1) == 0){
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
195
225
/* It already exists */
196
226
if(replace){
197
char *new = realloc(*e, strlen(def) + 1);
198
if(new == NULL){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
199
232
return false;
200
233
}
201
*e = new;
202
strcpy(*e, def);
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
203
236
}
204
237
return true;
205
238
}
207
240
return add_to_char_array(def, &(p->environ), &(p->envc));
208
241
}
209
242
243
#ifndef O_CLOEXEC
210
244
/*
211
245
* Based on the example in the GNU LibC manual chapter 13.13 "File
212
246
* Descriptor Flags".
213
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
214
248
*/
249
__attribute__((warn_unused_result))
215
250
static int set_cloexec_flag(int fd){
216
int ret = fcntl(fd, F_GETFD, 0);
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
217
252
/* If reading the flags failed, return error indication now. */
218
253
if(ret < 0){
219
254
return ret;
220
255
}
221
256
/* Store modified flag word in the descriptor. */
222
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
223
259
}
260
#endif /* not O_CLOEXEC */
224
261
225
262
226
263
/* Mark processes as completed when they exit, and save their exit
240
277
/* No child processes */
241
278
break;
242
279
}
243
perror("waitpid");
280
error(0, errno, "waitpid");
244
281
}
245
282
246
283
/* A child exited, find it in process_list */
258
295
}
259
296
260
297
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
261
299
static bool print_out_password(const char *buffer, size_t length){
262
300
ssize_t ret;
263
301
for(size_t written = 0; written < length; written += (size_t)ret){
271
309
}
272
310
273
311
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
274
313
static void free_plugin(plugin *plugin_node){
275
314
276
315
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
310
349
char *plugindir = NULL;
311
350
char *argfile = NULL;
312
351
FILE *conffp;
313
size_t d_name_len;
314
DIR *dir = NULL;
315
struct dirent *dirst;
352
struct dirent **direntries = NULL;
316
353
struct stat st;
317
354
fd_set rfds_all;
318
355
int ret, maxfd = 0;
319
356
ssize_t sret;
320
intmax_t tmpmax;
321
357
uid_t uid = 65534;
322
358
gid_t gid = 65534;
323
359
bool debug = false;
327
363
.sa_flags = SA_NOCLDSTOP };
328
364
char **custom_argv = NULL;
329
365
int custom_argc = 0;
366
int dir_fd = -1;
330
367
331
368
/* Establish a signal handler */
332
369
sigemptyset(&sigchld_action.sa_mask);
333
370
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
334
371
if(ret == -1){
335
perror("sigaddset");
336
exitstatus = EXIT_FAILURE;
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
337
374
goto fallback;
338
375
}
339
376
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
340
377
if(ret == -1){
341
perror("sigaction");
342
exitstatus = EXIT_FAILURE;
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
343
380
goto fallback;
344
381
}
345
382
377
414
.doc = "Group ID the plugins will run as", .group = 3 },
378
415
{ .name = "debug", .key = 132,
379
416
.doc = "Debug mode", .group = 4 },
417
/*
418
* These reproduce what we would get without ARGP_NO_HELP
419
*/
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
380
426
{ .name = NULL }
381
427
};
382
428
383
error_t parse_opt(int key, char *arg, __attribute__((unused))
384
struct argp_state *state){
385
char *tmp;
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
386
432
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
387
435
case 'g': /* --global-options */
388
if(arg != NULL){
436
{
389
437
char *plugin_option;
390
438
while((plugin_option = strsep(&arg, ",")) != NULL){
391
if(plugin_option[0] == '\0'){
392
continue;
393
}
394
439
if(not add_argument(getplugin(NULL), plugin_option)){
395
perror("add_argument");
396
return ARGP_ERR_UNKNOWN;
440
break;
397
441
}
398
442
}
443
errno = 0;
399
444
}
400
445
break;
401
446
case 'G': /* --global-env */
402
if(arg == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), arg, true)){
406
perror("add_environment");
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
407
449
}
408
450
break;
409
451
case 'o': /* --options-for */
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;
452
{
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
456
errno = EINVAL;
457
break;
458
}
459
*option_list = '\0';
460
option_list++;
461
if(arg[0] == '\0'){
462
argp_error(state, "Empty plugin name");
463
errno = EINVAL;
464
break;
465
}
466
char *option;
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
469
break;
420
470
}
421
471
}
472
errno = 0;
422
473
}
423
474
break;
424
475
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
476
{
429
477
char *envdef = strchr(arg, ':');
430
478
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
431
481
break;
432
482
}
433
483
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
484
envdef++;
485
if(arg[0] == '\0'){
486
argp_error(state, "Empty plugin name");
487
errno = EINVAL;
488
break;
489
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
436
492
}
437
493
}
438
494
break;
439
495
case 'd': /* --disable */
440
if(arg != NULL){
496
{
441
497
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
444
501
}
445
p->disabled = true;
446
502
}
447
503
break;
448
504
case 'e': /* --enable */
449
if(arg != NULL){
505
{
450
506
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
453
510
}
454
p->disabled = false;
455
511
}
456
512
break;
457
513
case 128: /* --plugin-dir */
458
514
free(plugindir);
459
515
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
516
if(plugindir != NULL){
517
errno = 0;
462
518
}
463
519
break;
464
520
case 129: /* --config-file */
465
521
/* This is already done by parse_opt_config_file() */
466
522
break;
467
523
case 130: /* --userid */
468
errno = 0;
469
tmpmax = strtoimax(arg, &tmp, 10);
524
tmp_id = strtoimax(arg, &tmp, 10);
470
525
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
529
break;
476
530
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
477
533
break;
478
534
case 131: /* --groupid */
479
errno = 0;
480
tmpmax = strtoimax(arg, &tmp, 10);
535
tmp_id = strtoimax(arg, &tmp, 10);
481
536
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
540
break;
487
541
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
488
544
break;
489
545
case 132: /* --debug */
490
546
debug = true;
491
547
break;
548
/*
549
* These reproduce what we would get without ARGP_NO_HELP
550
*/
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
560
exit(EXIT_SUCCESS);
561
break;
492
562
/*
493
563
* When adding more options before this line, remember to also add a
494
564
* "case" to the "parse_opt_config_file" function below.
497
567
/* Cryptsetup always passes an argument, which is an empty
498
568
string if "none" was specified in /etc/crypttab. So if
499
569
argument was empty, we ignore it silently. */
500
if(arg[0] != '\0'){
501
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
570
if(arg[0] == '\0'){
571
break;
502
572
}
503
break;
504
case ARGP_KEY_END:
505
break;
506
573
default:
507
574
return ARGP_ERR_UNKNOWN;
508
575
}
509
return 0;
576
return errno; /* Set to 0 at start */
510
577
}
511
578
512
579
/* This option parser is the same as parse_opt() above, except it
514
581
error_t parse_opt_config_file(int key, char *arg,
515
582
__attribute__((unused))
516
583
struct argp_state *state){
584
errno = 0;
517
585
switch(key){
518
586
case 'g': /* --global-options */
519
587
case 'G': /* --global-env */
526
594
case 129: /* --config-file */
527
595
free(argfile);
528
596
argfile = strdup(arg);
529
if(argfile == NULL){
530
perror("strdup");
597
if(argfile != NULL){
598
errno = 0;
531
599
}
532
600
break;
533
601
case 130: /* --userid */
534
602
case 131: /* --groupid */
535
603
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
536
607
case ARGP_KEY_ARG:
537
case ARGP_KEY_END:
538
608
break;
539
609
default:
540
610
return ARGP_ERR_UNKNOWN;
541
611
}
542
return 0;
612
return errno;
543
613
}
544
614
545
615
struct argp argp = { .options = options,
549
619
550
620
/* Parse using parse_opt_config_file() in order to get the custom
551
621
config file location, if any. */
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;
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
624
NULL, NULL);
625
switch(ret){
626
case 0:
627
break;
628
case ENOMEM:
629
default:
630
errno = ret;
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
case EINVAL:
635
exitstatus = EX_USAGE;
556
636
goto fallback;
557
637
}
558
638
575
655
custom_argc = 1;
576
656
custom_argv = malloc(sizeof(char*) * 2);
577
657
if(custom_argv == NULL){
578
perror("malloc");
579
exitstatus = EXIT_FAILURE;
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
580
660
goto fallback;
581
661
}
582
662
custom_argv[0] = argv[0];
598
678
}
599
679
new_arg = strdup(p);
600
680
if(new_arg == NULL){
601
perror("strdup");
602
exitstatus = EXIT_FAILURE;
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
603
683
free(org_line);
604
684
goto fallback;
605
685
}
606
686
607
687
custom_argc += 1;
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;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
615
701
}
616
702
custom_argv[custom_argc-1] = new_arg;
617
703
custom_argv[custom_argc] = NULL;
618
704
}
619
705
}
706
do {
707
ret = fclose(conffp);
708
} while(ret == EOF and errno == EINTR);
709
if(ret == EOF){
710
error(0, errno, "fclose");
711
exitstatus = EX_IOERR;
712
goto fallback;
713
}
620
714
free(org_line);
621
715
} else {
622
716
/* Check for harmful errors and go to fallback. Other errors might
623
717
not affect opening plugins */
624
718
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
perror("fopen");
626
exitstatus = EXIT_FAILURE;
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
627
721
goto fallback;
628
722
}
629
723
}
630
/* If there was any arguments from configuration file,
631
pass them to parser as command arguments */
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
632
726
if(custom_argv != NULL){
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;
727
ret = argp_parse(&argp, custom_argc, custom_argv,
728
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
NULL, NULL);
730
switch(ret){
731
case 0:
732
break;
733
case ENOMEM:
734
default:
735
errno = ret;
736
error(0, errno, "argp_parse");
737
exitstatus = EX_OSERR;
738
goto fallback;
739
case EINVAL:
740
exitstatus = EX_CONFIG;
638
741
goto fallback;
639
742
}
640
743
}
641
744
642
745
/* Parse actual command line arguments, to let them override the
643
746
config file */
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;
747
ret = argp_parse(&argp, argc, argv,
748
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
NULL, NULL);
750
switch(ret){
751
case 0:
752
break;
753
case ENOMEM:
754
default:
755
errno = ret;
756
error(0, errno, "argp_parse");
757
exitstatus = EX_OSERR;
758
goto fallback;
759
case EINVAL:
760
exitstatus = EX_USAGE;
648
761
goto fallback;
649
762
}
650
763
662
775
}
663
776
}
664
777
665
/* Strip permissions down to nobody */
666
setgid(gid);
778
if(getuid() == 0){
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
786
} else {
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
if(ret == -1){
789
error(0, errno, "fstat");
790
} else {
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
793
if(ret == -1){
794
error(0, errno, "fchown");
795
}
796
}
797
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
}
800
}
801
802
/* Lower permissions */
803
ret = setgid(gid);
667
804
if(ret == -1){
668
perror("setgid");
805
error(0, errno, "setgid");
669
806
}
670
807
ret = setuid(uid);
671
808
if(ret == -1){
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 */
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
688
813
{
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;
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
821
if(dir_fd == -1){
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
824
goto fallback;
825
}
826
827
#ifndef O_CLOEXEC
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
830
if(ret < 0){
831
error(0, errno, "set_cloexec_flag");
832
exitstatus = EX_OSERR;
833
goto fallback;
834
}
835
#endif /* O_CLOEXEC */
836
}
837
838
int good_name(const struct dirent * const dirent){
839
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
840
"*.dpkg-old", "*.dpkg-bak",
841
"*.dpkg-divert", NULL };
842
#ifdef __GNUC__
843
#pragma GCC diagnostic push
844
#pragma GCC diagnostic ignored "-Wcast-qual"
845
#endif
846
for(const char **pat = (const char **)patterns;
847
*pat != NULL; pat++){
848
#ifdef __GNUC__
849
#pragma GCC diagnostic pop
850
#endif
851
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
852
!= FNM_NOMATCH){
853
if(debug){
854
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
855
" matching pattern %s\n", dirent->d_name, *pat);
856
}
857
return 0;
696
858
}
697
859
}
860
return 1;
861
}
862
863
#ifdef __GLIBC__
864
#if __GLIBC_PREREQ(2, 15)
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
866
alphasort);
867
#else /* not __GLIBC_PREREQ(2, 15) */
868
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
869
&direntries, good_name, alphasort);
870
#endif /* not __GLIBC_PREREQ(2, 15) */
871
#else /* not __GLIBC__ */
872
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
873
&direntries, good_name, alphasort);
874
#endif /* not __GLIBC__ */
875
if(numplugins == -1){
876
error(0, errno, "Could not scan plugin dir");
877
direntries = NULL;
878
exitstatus = EX_OSERR;
879
goto fallback;
698
880
}
699
881
700
882
FD_ZERO(&rfds_all);
701
883
702
884
/* Read and execute any executable in the plugin directory*/
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");
885
for(int i = 0; i < numplugins; i++){
886
887
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
888
if(plugin_fd == -1){
889
error(0, errno, "Could not open plugin");
890
free(direntries[i]);
770
891
continue;
771
892
}
772
773
ret = stat(filename, &st);
893
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
774
894
if(ret == -1){
775
perror("stat");
776
free(filename);
895
error(0, errno, "stat");
896
TEMP_FAILURE_RETRY(close(plugin_fd));
897
free(direntries[i]);
777
898
continue;
778
899
}
779
900
780
901
/* Ignore non-executable files */
781
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
902
if(not S_ISREG(st.st_mode)
903
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
904
X_OK, 0)) != 0)){
782
905
if(debug){
783
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
784
" with bad type or mode\n", filename);
906
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
907
" with bad type or mode\n",
908
plugindir != NULL ? plugindir : PDIR,
909
direntries[i]->d_name);
785
910
}
786
free(filename);
911
TEMP_FAILURE_RETRY(close(plugin_fd));
912
free(direntries[i]);
787
913
continue;
788
914
}
789
915
790
plugin *p = getplugin(dirst->d_name);
916
plugin *p = getplugin(direntries[i]->d_name);
791
917
if(p == NULL){
792
perror("getplugin");
793
free(filename);
918
error(0, errno, "getplugin");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
920
free(direntries[i]);
794
921
continue;
795
922
}
796
923
if(p->disabled){
797
924
if(debug){
798
925
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
799
dirst->d_name);
926
direntries[i]->d_name);
800
927
}
801
free(filename);
928
TEMP_FAILURE_RETRY(close(plugin_fd));
929
free(direntries[i]);
802
930
continue;
803
931
}
804
932
{
807
935
if(g != NULL){
808
936
for(char **a = g->argv + 1; *a != NULL; a++){
809
937
if(not add_argument(p, *a)){
810
perror("add_argument");
938
error(0, errno, "add_argument");
811
939
}
812
940
}
813
941
/* Add global environment variables */
814
942
for(char **e = g->environ; *e != NULL; e++){
815
943
if(not add_environment(p, *e, false)){
816
perror("add_environment");
944
error(0, errno, "add_environment");
817
945
}
818
946
}
819
947
}
820
948
}
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. */
949
/* If this plugin has any environment variables, we need to
950
duplicate the environment from this process, too. */
824
951
if(p->environ[0] != NULL){
825
952
for(char **e = environ; *e != NULL; e++){
826
953
if(not add_environment(p, *e, false)){
827
perror("add_environment");
954
error(0, errno, "add_environment");
828
955
}
829
956
}
830
957
}
831
958
832
959
int pipefd[2];
833
ret = pipe(pipefd);
960
#ifndef O_CLOEXEC
961
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
962
#else /* O_CLOEXEC */
963
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
964
#endif /* O_CLOEXEC */
834
965
if(ret == -1){
835
perror("pipe");
836
exitstatus = EXIT_FAILURE;
837
goto fallback;
838
}
966
error(0, errno, "pipe");
967
exitstatus = EX_OSERR;
968
free(direntries[i]);
969
goto fallback;
970
}
971
if(pipefd[0] >= FD_SETSIZE){
972
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
973
FD_SETSIZE);
974
TEMP_FAILURE_RETRY(close(pipefd[0]));
975
TEMP_FAILURE_RETRY(close(pipefd[1]));
976
exitstatus = EX_OSERR;
977
free(direntries[i]);
978
goto fallback;
979
}
980
#ifndef O_CLOEXEC
839
981
/* Ask OS to automatic close the pipe on exec */
840
982
ret = set_cloexec_flag(pipefd[0]);
841
983
if(ret < 0){
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
984
error(0, errno, "set_cloexec_flag");
985
TEMP_FAILURE_RETRY(close(pipefd[0]));
986
TEMP_FAILURE_RETRY(close(pipefd[1]));
987
exitstatus = EX_OSERR;
988
free(direntries[i]);
844
989
goto fallback;
845
990
}
846
991
ret = set_cloexec_flag(pipefd[1]);
847
992
if(ret < 0){
848
perror("set_cloexec_flag");
849
exitstatus = EXIT_FAILURE;
993
error(0, errno, "set_cloexec_flag");
994
TEMP_FAILURE_RETRY(close(pipefd[0]));
995
TEMP_FAILURE_RETRY(close(pipefd[1]));
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
850
998
goto fallback;
851
999
}
1000
#endif /* not O_CLOEXEC */
852
1001
/* Block SIGCHLD until process is safely in process list */
853
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1002
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1003
&sigchld_action.sa_mask,
1004
NULL));
854
1005
if(ret < 0){
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1006
error(0, errno, "sigprocmask");
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
857
1009
goto fallback;
858
1010
}
859
1011
/* Starting a new process to be watched */
860
pid_t pid = fork();
1012
pid_t pid;
1013
do {
1014
pid = fork();
1015
} while(pid == -1 and errno == EINTR);
861
1016
if(pid == -1){
862
perror("fork");
863
exitstatus = EXIT_FAILURE;
1017
error(0, errno, "fork");
1018
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1019
&sigchld_action.sa_mask, NULL));
1020
TEMP_FAILURE_RETRY(close(pipefd[0]));
1021
TEMP_FAILURE_RETRY(close(pipefd[1]));
1022
exitstatus = EX_OSERR;
1023
free(direntries[i]);
864
1024
goto fallback;
865
1025
}
866
1026
if(pid == 0){
867
1027
/* this is the child process */
868
1028
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
869
1029
if(ret < 0){
870
perror("sigaction");
871
_exit(EXIT_FAILURE);
1030
error(0, errno, "sigaction");
1031
_exit(EX_OSERR);
872
1032
}
873
1033
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
1034
if(ret < 0){
875
perror("sigprocmask");
876
_exit(EXIT_FAILURE);
1035
error(0, errno, "sigprocmask");
1036
_exit(EX_OSERR);
877
1037
}
878
1038
879
1039
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
880
1040
if(ret == -1){
881
perror("dup2");
882
_exit(EXIT_FAILURE);
1041
error(0, errno, "dup2");
1042
_exit(EX_OSERR);
883
1043
}
884
1044
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
}
1045
if(fexecve(plugin_fd, p->argv,
1046
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1047
error(0, errno, "fexecve for %s/%s",
1048
plugindir != NULL ? plugindir : PDIR,
1049
direntries[i]->d_name);
1050
_exit(EX_OSERR);
900
1051
}
901
1052
/* no return */
902
1053
}
903
1054
/* Parent process */
904
close(pipefd[1]); /* Close unused write end of pipe */
905
free(filename);
906
plugin *new_plugin = getplugin(dirst->d_name);
1055
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1056
pipe */
1057
TEMP_FAILURE_RETRY(close(plugin_fd));
1058
plugin *new_plugin = getplugin(direntries[i]->d_name);
907
1059
if(new_plugin == NULL){
908
perror("getplugin");
909
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1060
error(0, errno, "getplugin");
1061
ret = (int)(TEMP_FAILURE_RETRY
1062
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1063
NULL)));
910
1064
if(ret < 0){
911
perror("sigprocmask");
1065
error(0, errno, "sigprocmask");
912
1066
}
913
exitstatus = EXIT_FAILURE;
1067
exitstatus = EX_OSERR;
1068
free(direntries[i]);
914
1069
goto fallback;
915
1070
}
1071
free(direntries[i]);
916
1072
917
1073
new_plugin->pid = pid;
918
1074
new_plugin->fd = pipefd[0];
919
1075
920
1076
/* Unblock SIGCHLD so signal handler can be run if this process
921
1077
has already completed */
922
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1078
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1079
&sigchld_action.sa_mask,
1080
NULL));
923
1081
if(ret < 0){
924
perror("sigprocmask");
925
exitstatus = EXIT_FAILURE;
1082
error(0, errno, "sigprocmask");
1083
exitstatus = EX_OSERR;
926
1084
goto fallback;
927
1085
}
928
1086
929
FD_SET(new_plugin->fd, &rfds_all);
1087
#if defined (__GNUC__) and defined (__GLIBC__)
1088
#if not __GLIBC_PREREQ(2, 16)
1089
#pragma GCC diagnostic push
1090
#pragma GCC diagnostic ignored "-Wsign-conversion"
1091
#endif
1092
#endif
1093
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1094
-Wconversion in GNU libc
1095
before 2.16 */
1096
#if defined (__GNUC__) and defined (__GLIBC__)
1097
#if not __GLIBC_PREREQ(2, 16)
1098
#pragma GCC diagnostic pop
1099
#endif
1100
#endif
930
1101
931
1102
if(maxfd < new_plugin->fd){
932
1103
maxfd = new_plugin->fd;
933
1104
}
934
1105
}
935
1106
936
closedir(dir);
937
dir = NULL;
1107
free(direntries);
1108
direntries = NULL;
1109
TEMP_FAILURE_RETRY(close(dir_fd));
1110
dir_fd = -1;
938
1111
free_plugin(getplugin(NULL));
939
1112
940
1113
for(plugin *p = plugin_list; p != NULL; p = p->next){
952
1125
while(plugin_list){
953
1126
fd_set rfds = rfds_all;
954
1127
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
955
if(select_ret == -1){
956
perror("select");
957
exitstatus = EXIT_FAILURE;
1128
if(select_ret == -1 and errno != EINTR){
1129
error(0, errno, "select");
1130
exitstatus = EX_OSERR;
958
1131
goto fallback;
959
1132
}
960
1133
/* OK, now either a process completed, or something can be read
986
1159
}
987
1160
988
1161
/* Remove the plugin */
989
FD_CLR(proc->fd, &rfds_all);
1162
#if defined (__GNUC__) and defined (__GLIBC__)
1163
#if not __GLIBC_PREREQ(2, 16)
1164
#pragma GCC diagnostic push
1165
#pragma GCC diagnostic ignored "-Wsign-conversion"
1166
#endif
1167
#endif
1168
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1169
-Wconversion in GNU libc
1170
before 2.16 */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic pop
1174
#endif
1175
#endif
990
1176
991
1177
/* Block signal while modifying process_list */
992
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1178
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1179
(SIG_BLOCK,
1180
&sigchld_action.sa_mask,
1181
NULL));
993
1182
if(ret < 0){
994
perror("sigprocmask");
995
exitstatus = EXIT_FAILURE;
1183
error(0, errno, "sigprocmask");
1184
exitstatus = EX_OSERR;
996
1185
goto fallback;
997
1186
}
998
1187
1001
1190
proc = next_plugin;
1002
1191
1003
1192
/* We are done modifying process list, so unblock signal */
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1005
NULL);
1193
ret = (int)(TEMP_FAILURE_RETRY
1194
(sigprocmask(SIG_UNBLOCK,
1195
&sigchld_action.sa_mask, NULL)));
1006
1196
if(ret < 0){
1007
perror("sigprocmask");
1008
exitstatus = EXIT_FAILURE;
1197
error(0, errno, "sigprocmask");
1198
exitstatus = EX_OSERR;
1009
1199
goto fallback;
1010
1200
}
1011
1201
1021
1211
bool bret = print_out_password(proc->buffer,
1022
1212
proc->buffer_length);
1023
1213
if(not bret){
1024
perror("print_out_password");
1025
exitstatus = EXIT_FAILURE;
1214
error(0, errno, "print_out_password");
1215
exitstatus = EX_IOERR;
1026
1216
}
1027
1217
goto fallback;
1028
1218
}
1029
1219
1030
1220
/* This process has not completed. Does it have any output? */
1031
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1221
#if defined (__GNUC__) and defined (__GLIBC__)
1222
#if not __GLIBC_PREREQ(2, 16)
1223
#pragma GCC diagnostic push
1224
#pragma GCC diagnostic ignored "-Wsign-conversion"
1225
#endif
1226
#endif
1227
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1228
warning from
1229
-Wconversion
1230
in GNU libc
1231
before
1232
2.16 */
1233
#if defined (__GNUC__) and defined (__GLIBC__)
1234
#if not __GLIBC_PREREQ(2, 16)
1235
#pragma GCC diagnostic pop
1236
#endif
1237
#endif
1032
1238
/* This process had nothing to say at this time */
1033
1239
proc = proc->next;
1034
1240
continue;
1035
1241
}
1036
1242
/* Before reading, make the process' data buffer large enough */
1037
1243
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
1244
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1245
+ (size_t) BUFFER_SIZE);
1246
if(new_buffer == NULL){
1247
error(0, errno, "malloc");
1248
exitstatus = EX_OSERR;
1043
1249
goto fallback;
1044
1250
}
1251
proc->buffer = new_buffer;
1045
1252
proc->buffer_size += BUFFER_SIZE;
1046
1253
}
1047
1254
/* Read from the process */
1048
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1049
BUFFER_SIZE);
1255
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1256
proc->buffer
1257
+ proc->buffer_length,
1258
BUFFER_SIZE));
1050
1259
if(sret < 0){
1051
1260
/* Read error from this process; ignore the error */
1052
1261
proc = proc->next;
1064
1273
1065
1274
fallback:
1066
1275
1067
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1276
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1277
and exitstatus != EX_OK)){
1068
1278
/* Fallback if all plugins failed, none are found or an error
1069
1279
occured */
1070
1280
bool bret;
1078
1288
}
1079
1289
bret = print_out_password(passwordbuffer, len);
1080
1290
if(not bret){
1081
perror("print_out_password");
1082
exitstatus = EXIT_FAILURE;
1291
error(0, errno, "print_out_password");
1292
exitstatus = EX_IOERR;
1083
1293
}
1084
1294
}
1085
1295
1086
1296
/* Restore old signal handler */
1087
1297
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1088
1298
if(ret == -1){
1089
perror("sigaction");
1090
exitstatus = EXIT_FAILURE;
1299
error(0, errno, "sigaction");
1300
exitstatus = EX_OSERR;
1091
1301
}
1092
1302
1093
1303
if(custom_argv != NULL){
1097
1307
free(custom_argv);
1098
1308
}
1099
1309
1100
if(dir != NULL){
1101
closedir(dir);
1310
free(direntries);
1311
1312
if(dir_fd != -1){
1313
TEMP_FAILURE_RETRY(close(dir_fd));
1102
1314
}
1103
1315
1104
1316
/* Kill the processes */
1108
1320
ret = kill(p->pid, SIGTERM);
1109
1321
if(ret == -1 and errno != ESRCH){
1110
1322
/* Set-uid proccesses might not get closed */
1111
perror("kill");
1323
error(0, errno, "kill");
1112
1324
}
1113
1325
}
1114
1326
}
1115
1327
1116
1328
/* Wait for any remaining child processes to terminate */
1117
do{
1329
do {
1118
1330
ret = wait(NULL);
1119
1331
} while(ret >= 0);
1120
1332
if(errno != ECHILD){
1121
perror("wait");
1333
error(0, errno, "wait");
1122
1334
}
1123
1335
1124
1336
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0