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- Committer: Teddy Hogeborn
- Date: 2009-05-17 03:13:49 UTC
- Revision ID: teddy@fukt.bsnet.se-20090517031349-026hbn7ye1yz8g98
* debian/mandos-client.postinst (update_initramfs): Bug fix: typo.
Only change
permissions on
files.
Only change
permissions on
files.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- 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 © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* DIR, fdopendir(), fstat(), struct
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), 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(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
48
FD_CLOEXEC, write(), STDOUT_FILENO,
49
struct stat, fstat(), close(),
50
setgid(), setuid(), S_ISREG(),
51
faccessat() pipe(), fork(),
52
_exit(), dup2(), fexecve(), read()
53
*/
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() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC, openat() */
56
#include <string.h> /* strsep, strlen(), strsignal(),
57
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
68
66
*/
69
67
#include <errno.h> /* errno, EBADF */
70
68
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
#include <fnmatch.h> /* fnmatch() */
76
69
77
70
#define BUFFER_SIZE 256
78
71
80
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
74
82
75
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
77
85
78
typedef struct plugin{
86
79
char *name; /* can be NULL or any plugin name */
106
99
107
100
/* Gets an existing plugin based on name,
108
101
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
102
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
112
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
105
if((p->name == name)
114
106
or (p->name and name and (strcmp(p->name, name) == 0))){
116
108
}
117
109
}
118
110
/* 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);
111
plugin *new_plugin = malloc(sizeof(plugin));
123
112
if(new_plugin == NULL){
124
113
return NULL;
125
114
}
126
115
char *copy_name = NULL;
127
116
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
131
118
if(copy_name == NULL){
132
int e = errno;
133
119
free(new_plugin);
134
errno = e;
135
120
return NULL;
136
121
}
137
122
}
141
126
.disabled = false,
142
127
.next = plugin_list };
143
128
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
147
130
if(new_plugin->argv == NULL){
148
int e = errno;
149
131
free(copy_name);
150
132
free(new_plugin);
151
errno = e;
152
133
return NULL;
153
134
}
154
135
new_plugin->argv[0] = copy_name;
155
136
new_plugin->argv[1] = NULL;
156
137
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
160
139
if(new_plugin->environ == NULL){
161
int e = errno;
162
140
free(copy_name);
163
141
free(new_plugin->argv);
164
142
free(new_plugin);
165
errno = e;
166
143
return NULL;
167
144
}
168
145
new_plugin->environ[0] = NULL;
173
150
}
174
151
175
152
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
153
static bool add_to_char_array(const char *new, char ***array,
178
154
int *len){
179
155
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
185
158
/* Malloc check */
186
if(new_array == NULL){
159
if(*array == NULL){
187
160
return false;
188
161
}
189
*array = new_array;
190
162
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
195
164
if(copy == NULL){
196
165
return false;
197
166
}
204
173
}
205
174
206
175
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
176
static bool add_argument(plugin *p, const char *arg){
209
177
if(p == NULL){
210
178
return false;
213
181
}
214
182
215
183
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
184
static bool add_environment(plugin *p, const char *def, bool replace){
218
185
if(p == NULL){
219
186
return false;
221
188
/* namelen = length of name of environment variable */
222
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
190
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
226
193
/* It already exists */
227
194
if(replace){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
233
197
return false;
234
198
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
199
*e = new;
200
strcpy(*e, def);
237
201
}
238
202
return true;
239
203
}
244
208
/*
245
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
210
* Descriptor Flags".
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
212
*/
249
__attribute__((warn_unused_result))
250
213
static int set_cloexec_flag(int fd){
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
252
215
/* If reading the flags failed, return error indication now. */
253
216
if(ret < 0){
254
217
return ret;
255
218
}
256
219
/* Store modified flag word in the descriptor. */
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
259
221
}
260
222
261
223
276
238
/* No child processes */
277
239
break;
278
240
}
279
error(0, errno, "waitpid");
241
perror("waitpid");
280
242
}
281
243
282
244
/* A child exited, find it in process_list */
294
256
}
295
257
296
258
/* Prints out a password to stdout */
297
__attribute__((nonnull, warn_unused_result))
298
259
static bool print_out_password(const char *buffer, size_t length){
299
260
ssize_t ret;
300
261
for(size_t written = 0; written < length; written += (size_t)ret){
308
269
}
309
270
310
271
/* Removes and free a plugin from the plugin list */
311
__attribute__((nonnull))
312
272
static void free_plugin(plugin *plugin_node){
313
273
314
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
348
308
char *plugindir = NULL;
349
309
char *argfile = NULL;
350
310
FILE *conffp;
311
size_t d_name_len;
351
312
DIR *dir = NULL;
352
313
struct dirent *dirst;
353
314
struct stat st;
354
315
fd_set rfds_all;
355
316
int ret, maxfd = 0;
356
317
ssize_t sret;
318
intmax_t tmpmax;
357
319
uid_t uid = 65534;
358
320
gid_t gid = 65534;
359
321
bool debug = false;
363
325
.sa_flags = SA_NOCLDSTOP };
364
326
char **custom_argv = NULL;
365
327
int custom_argc = 0;
366
int dir_fd;
367
328
368
329
/* Establish a signal handler */
369
330
sigemptyset(&sigchld_action.sa_mask);
370
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
332
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
374
335
goto fallback;
375
336
}
376
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
338
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
380
341
goto fallback;
381
342
}
382
343
414
375
.doc = "Group ID the plugins will run as", .group = 3 },
415
376
{ .name = "debug", .key = 132,
416
377
.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 },
426
378
{ .name = NULL }
427
379
};
428
380
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
383
char *tmp;
432
384
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
435
385
case 'g': /* --global-options */
436
{
386
if(arg != NULL){
437
387
char *plugin_option;
438
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
439
392
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
441
395
}
442
396
}
443
errno = 0;
444
397
}
445
398
break;
446
399
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
449
405
}
450
406
break;
451
407
case 'o': /* --options-for */
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;
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
418
}
471
419
}
472
errno = 0;
473
420
}
474
421
break;
475
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
476
426
{
477
427
char *envdef = strchr(arg, ':');
478
428
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
429
break;
482
430
}
483
431
*envdef = '\0';
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;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
492
434
}
493
435
}
494
436
break;
495
437
case 'd': /* --disable */
496
{
438
if(arg != NULL){
497
439
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
501
442
}
443
p->disabled = true;
502
444
}
503
445
break;
504
446
case 'e': /* --enable */
505
{
447
if(arg != NULL){
506
448
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
510
451
}
452
p->disabled = false;
511
453
}
512
454
break;
513
455
case 128: /* --plugin-dir */
514
456
free(plugindir);
515
457
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
519
461
break;
520
462
case 129: /* --config-file */
521
463
/* This is already done by parse_opt_config_file() */
522
464
break;
523
465
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
466
errno = 0;
467
tmpmax = strtoimax(arg, &tmp, 10);
525
468
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
530
474
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
533
475
break;
534
476
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
477
errno = 0;
478
tmpmax = strtoimax(arg, &tmp, 10);
536
479
if(errno != 0 or tmp == arg or *tmp != '\0'
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;
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;
541
485
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
544
486
break;
545
487
case 132: /* --debug */
546
488
debug = true;
547
489
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;
562
490
/*
563
491
* When adding more options before this line, remember to also add a
564
492
* "case" to the "parse_opt_config_file" function below.
567
495
/* Cryptsetup always passes an argument, which is an empty
568
496
string if "none" was specified in /etc/crypttab. So if
569
497
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
500
}
501
break;
502
case ARGP_KEY_END:
503
break;
573
504
default:
574
505
return ARGP_ERR_UNKNOWN;
575
506
}
576
return errno; /* Set to 0 at start */
507
return 0;
577
508
}
578
509
579
510
/* This option parser is the same as parse_opt() above, except it
581
512
error_t parse_opt_config_file(int key, char *arg,
582
513
__attribute__((unused))
583
514
struct argp_state *state){
584
errno = 0;
585
515
switch(key){
586
516
case 'g': /* --global-options */
587
517
case 'G': /* --global-env */
594
524
case 129: /* --config-file */
595
525
free(argfile);
596
526
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
527
if(argfile == NULL){
528
perror("strdup");
599
529
}
600
break;
530
break;
601
531
case 130: /* --userid */
602
532
case 131: /* --groupid */
603
533
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
608
536
break;
609
537
default:
610
538
return ARGP_ERR_UNKNOWN;
611
539
}
612
return errno;
540
return 0;
613
541
}
614
542
615
543
struct argp argp = { .options = options,
619
547
620
548
/* Parse using parse_opt_config_file() in order to get the custom
621
549
config file location, if any. */
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;
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;
636
554
goto fallback;
637
555
}
638
556
644
562
conffp = fopen(AFILE, "r");
645
563
} else {
646
564
conffp = fopen(argfile, "r");
647
}
565
}
648
566
if(conffp != NULL){
649
567
char *org_line = NULL;
650
568
char *p, *arg, *new_arg, *line;
655
573
custom_argc = 1;
656
574
custom_argv = malloc(sizeof(char*) * 2);
657
575
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
660
578
goto fallback;
661
579
}
662
580
custom_argv[0] = argv[0];
678
596
}
679
597
new_arg = strdup(p);
680
598
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
683
601
free(org_line);
684
602
goto fallback;
685
603
}
686
604
687
605
custom_argc += 1;
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
}
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;
701
613
}
702
614
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
704
616
}
705
617
}
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
}
714
618
free(org_line);
715
619
} else {
716
620
/* Check for harmful errors and go to fallback. Other errors might
717
621
not affect opening plugins */
718
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
721
625
goto fallback;
722
626
}
723
627
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
726
630
if(custom_argv != NULL){
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;
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;
741
636
goto fallback;
742
637
}
743
638
}
744
639
745
640
/* Parse actual command line arguments, to let them override the
746
641
config file */
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;
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;
761
646
goto fallback;
762
647
}
763
648
775
660
}
776
661
}
777
662
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);
663
/* Strip permissions down to nobody */
664
setgid(gid);
804
665
if(ret == -1){
805
error(0, errno, "setgid");
666
perror("setgid");
806
667
}
807
668
ret = setuid(uid);
808
669
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
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 */
813
686
{
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
TEMP_FAILURE_RETRY(close(dir_fd));
833
exitstatus = EX_OSERR;
834
goto fallback;
835
}
836
#endif /* O_CLOEXEC */
837
838
dir = fdopendir(dir_fd);
839
if(dir == NULL){
840
error(0, errno, "Could not open plugin dir");
841
TEMP_FAILURE_RETRY(close(dir_fd));
842
exitstatus = EX_OSERR;
843
goto fallback;
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;
694
}
844
695
}
845
696
}
846
697
848
699
849
700
/* Read and execute any executable in the plugin directory*/
850
701
while(true){
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
702
dirst = readdir(dir);
854
703
855
704
/* All directory entries have been processed */
856
705
if(dirst == NULL){
857
706
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
860
709
goto fallback;
861
710
}
862
711
break;
863
712
}
864
713
714
d_name_len = strlen(dirst->d_name);
715
865
716
/* Ignore dotfiles, backup files and other junk */
866
717
{
867
718
bool bad_name = false;
868
const char * const patterns[] = { ".*", "#*#", "*~",
869
"*.dpkg-new", "*.dpkg-old",
870
"*.dpkg-bak", "*.dpkg-divert",
871
NULL };
872
#ifdef __GNUC__
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
875
#endif
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
878
#ifdef __GNUC__
879
#pragma GCC diagnostic pop
880
#endif
881
if(fnmatch(*pat, dirst->d_name,
882
FNM_FILE_NAME | FNM_PERIOD) != FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirst->d_name, *pat);
886
}
887
bad_name = true;
888
break;
889
}
890
}
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
891
755
if(bad_name){
892
756
continue;
893
757
}
894
758
}
895
759
896
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
897
#ifdef O_CLOEXEC
898
O_CLOEXEC
899
#else /* not O_CLOEXEC */
900
0
901
#endif /* not O_CLOEXEC */
902
);
903
if(plugin_fd == -1){
904
error(0, errno, "Could not open plugin");
905
continue;
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);
906
765
}
907
#ifndef O_CLOEXEC
908
/* Set the FD_CLOEXEC flag on the plugin FD */
909
ret = set_cloexec_flag(plugin_fd);
910
766
if(ret < 0){
911
error(0, errno, "set_cloexec_flag");
912
TEMP_FAILURE_RETRY(close(plugin_fd));
767
perror("asprintf");
913
768
continue;
914
769
}
915
#endif /* O_CLOEXEC */
916
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
770
771
ret = stat(filename, &st);
917
772
if(ret == -1){
918
error(0, errno, "stat");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
773
perror("stat");
774
free(filename);
920
775
continue;
921
776
}
922
777
923
778
/* Ignore non-executable files */
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
926
0)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
780
if(debug){
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
931
783
}
932
TEMP_FAILURE_RETRY(close(plugin_fd));
784
free(filename);
933
785
continue;
934
786
}
935
787
936
788
plugin *p = getplugin(dirst->d_name);
937
789
if(p == NULL){
938
error(0, errno, "getplugin");
939
TEMP_FAILURE_RETRY(close(plugin_fd));
790
perror("getplugin");
791
free(filename);
940
792
continue;
941
793
}
942
794
if(p->disabled){
944
796
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
945
797
dirst->d_name);
946
798
}
947
TEMP_FAILURE_RETRY(close(plugin_fd));
799
free(filename);
948
800
continue;
949
801
}
950
802
{
953
805
if(g != NULL){
954
806
for(char **a = g->argv + 1; *a != NULL; a++){
955
807
if(not add_argument(p, *a)){
956
error(0, errno, "add_argument");
808
perror("add_argument");
957
809
}
958
810
}
959
811
/* Add global environment variables */
960
812
for(char **e = g->environ; *e != NULL; e++){
961
813
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
814
perror("add_environment");
963
815
}
964
816
}
965
817
}
966
818
}
967
/* If this plugin has any environment variables, we need to
968
duplicate the environment from this process, too. */
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. */
969
822
if(p->environ[0] != NULL){
970
823
for(char **e = environ; *e != NULL; e++){
971
824
if(not add_environment(p, *e, false)){
972
error(0, errno, "add_environment");
825
perror("add_environment");
973
826
}
974
827
}
975
828
}
976
829
977
830
int pipefd[2];
978
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
831
ret = pipe(pipefd);
979
832
if(ret == -1){
980
error(0, errno, "pipe");
981
exitstatus = EX_OSERR;
982
goto fallback;
983
}
984
if(pipefd[0] >= FD_SETSIZE){
985
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
986
FD_SETSIZE);
987
TEMP_FAILURE_RETRY(close(pipefd[0]));
988
TEMP_FAILURE_RETRY(close(pipefd[1]));
989
exitstatus = EX_OSERR;
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
990
835
goto fallback;
991
836
}
992
837
/* Ask OS to automatic close the pipe on exec */
993
838
ret = set_cloexec_flag(pipefd[0]);
994
839
if(ret < 0){
995
error(0, errno, "set_cloexec_flag");
996
TEMP_FAILURE_RETRY(close(pipefd[0]));
997
TEMP_FAILURE_RETRY(close(pipefd[1]));
998
exitstatus = EX_OSERR;
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
999
842
goto fallback;
1000
843
}
1001
844
ret = set_cloexec_flag(pipefd[1]);
1002
845
if(ret < 0){
1003
error(0, errno, "set_cloexec_flag");
1004
TEMP_FAILURE_RETRY(close(pipefd[0]));
1005
TEMP_FAILURE_RETRY(close(pipefd[1]));
1006
exitstatus = EX_OSERR;
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1007
848
goto fallback;
1008
849
}
1009
850
/* Block SIGCHLD until process is safely in process list */
1010
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1011
&sigchld_action.sa_mask,
1012
NULL));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1013
852
if(ret < 0){
1014
error(0, errno, "sigprocmask");
1015
exitstatus = EX_OSERR;
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1016
855
goto fallback;
1017
856
}
1018
857
/* Starting a new process to be watched */
1019
pid_t pid;
1020
do {
1021
pid = fork();
1022
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
1023
859
if(pid == -1){
1024
error(0, errno, "fork");
1025
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1026
&sigchld_action.sa_mask, NULL));
1027
TEMP_FAILURE_RETRY(close(pipefd[0]));
1028
TEMP_FAILURE_RETRY(close(pipefd[1]));
1029
exitstatus = EX_OSERR;
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1030
862
goto fallback;
1031
863
}
1032
864
if(pid == 0){
1033
865
/* this is the child process */
1034
866
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1035
867
if(ret < 0){
1036
error(0, errno, "sigaction");
1037
_exit(EX_OSERR);
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1038
870
}
1039
871
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1040
872
if(ret < 0){
1041
error(0, errno, "sigprocmask");
1042
_exit(EX_OSERR);
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1043
875
}
1044
876
1045
877
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1046
878
if(ret == -1){
1047
error(0, errno, "dup2");
1048
_exit(EX_OSERR);
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1049
881
}
1050
882
1051
883
if(dirfd(dir) < 0){
1053
885
above and must now close it manually here. */
1054
886
closedir(dir);
1055
887
}
1056
if(fexecve(plugin_fd, p->argv,
1057
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1058
error(0, errno, "fexecve for %s/%s",
1059
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1060
_exit(EX_OSERR);
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
}
1061
898
}
1062
899
/* no return */
1063
900
}
1064
901
/* Parent process */
1065
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1066
pipe */
1067
TEMP_FAILURE_RETRY(close(plugin_fd));
902
close(pipefd[1]); /* Close unused write end of pipe */
903
free(filename);
1068
904
plugin *new_plugin = getplugin(dirst->d_name);
1069
905
if(new_plugin == NULL){
1070
error(0, errno, "getplugin");
1071
ret = (int)(TEMP_FAILURE_RETRY
1072
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1073
NULL)));
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1074
908
if(ret < 0){
1075
error(0, errno, "sigprocmask");
909
perror("sigprocmask");
1076
910
}
1077
exitstatus = EX_OSERR;
911
exitstatus = EXIT_FAILURE;
1078
912
goto fallback;
1079
913
}
1080
914
1083
917
1084
918
/* Unblock SIGCHLD so signal handler can be run if this process
1085
919
has already completed */
1086
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1087
&sigchld_action.sa_mask,
1088
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
921
if(ret < 0){
1090
error(0, errno, "sigprocmask");
1091
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1092
924
goto fallback;
1093
925
}
1094
926
1095
#if defined (__GNUC__) and defined (__GLIBC__)
1096
#if not __GLIBC_PREREQ(2, 16)
1097
#pragma GCC diagnostic push
1098
#pragma GCC diagnostic ignored "-Wsign-conversion"
1099
#endif
1100
#endif
1101
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1102
-Wconversion in GNU libc
1103
before 2.16 */
1104
#if defined (__GNUC__) and defined (__GLIBC__)
1105
#if not __GLIBC_PREREQ(2, 16)
1106
#pragma GCC diagnostic pop
1107
#endif
1108
#endif
927
FD_SET(new_plugin->fd, &rfds_all);
1109
928
1110
929
if(maxfd < new_plugin->fd){
1111
930
maxfd = new_plugin->fd;
1112
931
}
1113
932
}
1114
933
1115
TEMP_FAILURE_RETRY(closedir(dir));
934
closedir(dir);
1116
935
dir = NULL;
1117
936
free_plugin(getplugin(NULL));
1118
937
1131
950
while(plugin_list){
1132
951
fd_set rfds = rfds_all;
1133
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1134
if(select_ret == -1 and errno != EINTR){
1135
error(0, errno, "select");
1136
exitstatus = EX_OSERR;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1137
956
goto fallback;
1138
957
}
1139
958
/* OK, now either a process completed, or something can be read
1154
973
WEXITSTATUS(proc->status));
1155
974
} else if(WIFSIGNALED(proc->status)){
1156
975
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1157
" signal %d: %s\n", proc->name,
976
" signal %d\n", proc->name,
1158
977
(intmax_t) (proc->pid),
1159
WTERMSIG(proc->status),
1160
strsignal(WTERMSIG(proc->status)));
978
WTERMSIG(proc->status));
1161
979
} else if(WCOREDUMP(proc->status)){
1162
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1163
981
" core\n", proc->name, (intmax_t) (proc->pid));
1165
983
}
1166
984
1167
985
/* Remove the plugin */
1168
#if defined (__GNUC__) and defined (__GLIBC__)
1169
#if not __GLIBC_PREREQ(2, 16)
1170
#pragma GCC diagnostic push
1171
#pragma GCC diagnostic ignored "-Wsign-conversion"
1172
#endif
1173
#endif
1174
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1175
-Wconversion in GNU libc
1176
before 2.16 */
1177
#if defined (__GNUC__) and defined (__GLIBC__)
1178
#if not __GLIBC_PREREQ(2, 16)
1179
#pragma GCC diagnostic pop
1180
#endif
1181
#endif
986
FD_CLR(proc->fd, &rfds_all);
1182
987
1183
988
/* Block signal while modifying process_list */
1184
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1185
(SIG_BLOCK,
1186
&sigchld_action.sa_mask,
1187
NULL));
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1188
990
if(ret < 0){
1189
error(0, errno, "sigprocmask");
1190
exitstatus = EX_OSERR;
991
perror("sigprocmask");
992
exitstatus = EXIT_FAILURE;
1191
993
goto fallback;
1192
994
}
1193
995
1196
998
proc = next_plugin;
1197
999
1198
1000
/* We are done modifying process list, so unblock signal */
1199
ret = (int)(TEMP_FAILURE_RETRY
1200
(sigprocmask(SIG_UNBLOCK,
1201
&sigchld_action.sa_mask, NULL)));
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1202
1003
if(ret < 0){
1203
error(0, errno, "sigprocmask");
1204
exitstatus = EX_OSERR;
1004
perror("sigprocmask");
1005
exitstatus = EXIT_FAILURE;
1205
1006
goto fallback;
1206
1007
}
1207
1008
1217
1018
bool bret = print_out_password(proc->buffer,
1218
1019
proc->buffer_length);
1219
1020
if(not bret){
1220
error(0, errno, "print_out_password");
1221
exitstatus = EX_IOERR;
1021
perror("print_out_password");
1022
exitstatus = EXIT_FAILURE;
1222
1023
}
1223
1024
goto fallback;
1224
1025
}
1225
1026
1226
1027
/* This process has not completed. Does it have any output? */
1227
#if defined (__GNUC__) and defined (__GLIBC__)
1228
#if not __GLIBC_PREREQ(2, 16)
1229
#pragma GCC diagnostic push
1230
#pragma GCC diagnostic ignored "-Wsign-conversion"
1231
#endif
1232
#endif
1233
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1234
warning from
1235
-Wconversion
1236
in GNU libc
1237
before
1238
2.16 */
1239
#if defined (__GNUC__) and defined (__GLIBC__)
1240
#if not __GLIBC_PREREQ(2, 16)
1241
#pragma GCC diagnostic pop
1242
#endif
1243
#endif
1028
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1244
1029
/* This process had nothing to say at this time */
1245
1030
proc = proc->next;
1246
1031
continue;
1247
1032
}
1248
1033
/* Before reading, make the process' data buffer large enough */
1249
1034
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1250
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1251
+ (size_t) BUFFER_SIZE);
1252
if(new_buffer == NULL){
1253
error(0, errno, "malloc");
1254
exitstatus = EX_OSERR;
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;
1255
1040
goto fallback;
1256
1041
}
1257
proc->buffer = new_buffer;
1258
1042
proc->buffer_size += BUFFER_SIZE;
1259
1043
}
1260
1044
/* Read from the process */
1261
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1262
proc->buffer
1263
+ proc->buffer_length,
1264
BUFFER_SIZE));
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1265
1047
if(sret < 0){
1266
1048
/* Read error from this process; ignore the error */
1267
1049
proc = proc->next;
1279
1061
1280
1062
fallback:
1281
1063
1282
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1283
and exitstatus != EX_OK)){
1064
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1284
1065
/* Fallback if all plugins failed, none are found or an error
1285
1066
occured */
1286
1067
bool bret;
1294
1075
}
1295
1076
bret = print_out_password(passwordbuffer, len);
1296
1077
if(not bret){
1297
error(0, errno, "print_out_password");
1298
exitstatus = EX_IOERR;
1078
perror("print_out_password");
1079
exitstatus = EXIT_FAILURE;
1299
1080
}
1300
1081
}
1301
1082
1302
1083
/* Restore old signal handler */
1303
1084
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1304
1085
if(ret == -1){
1305
error(0, errno, "sigaction");
1306
exitstatus = EX_OSERR;
1086
perror("sigaction");
1087
exitstatus = EXIT_FAILURE;
1307
1088
}
1308
1089
1309
1090
if(custom_argv != NULL){
1324
1105
ret = kill(p->pid, SIGTERM);
1325
1106
if(ret == -1 and errno != ESRCH){
1326
1107
/* Set-uid proccesses might not get closed */
1327
error(0, errno, "kill");
1108
perror("kill");
1328
1109
}
1329
1110
}
1330
1111
}
1331
1112
1332
1113
/* Wait for any remaining child processes to terminate */
1333
do {
1114
do{
1334
1115
ret = wait(NULL);
1335
1116
} while(ret >= 0);
1336
1117
if(errno != ECHILD){
1337
error(0, errno, "wait");
1118
perror("wait");
1338
1119
}
1339
1120
1340
1121
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0